JP2015178894A - Pipe coupling, fluid supply control device, and pipe connection structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately downsize or integrate a device configuration.SOLUTION: A pipe coupling of the present invention comprises: a body portion; a first opening portion; a second opening portion; and a pair of screw insertion holes. The body portion is a generally rectangular parallelepiped member and includes a joint surface (flat surface to be joined with an attachment target in a normal that is a height direction). The first opening portion is open in the joint surface. The second opening portion is open in one end portion of the body portion in a longitudinal direction. The paired screw insertion holes are provided on one end portion and the other end portion of the body section in the longitudinal direction across the first opening portion, respectively. A fluid passage spreading from the first opening portion to the second opening portion is formed to bypass the screw insertion holes.

Description

  The present invention relates to a pipe joint, a fluid supply control device using the pipe joint, and a pipe connection structure.

  As a configuration of this type of pipe joint and pipe connection structure, for example, those described in the following Patent Document 1, Patent Document 2, and the like are known.

  By the way, a fluid supply control device including a flow channel block having a fluid flow channel formed therein and a plurality of fluid control devices mounted on the flow channel block is, for example, a gas supply device in a semiconductor manufacturing process. It is used as. Specifically, for example, in the gas supply unit disclosed in Patent Document 3 below, a plurality of fluid control devices (fluid control valves, flow controllers, etc.) are provided in a channel block in which a gas channel is formed. Are fixed by screws (bolts). The plurality of fluid control devices are arranged in a line along the longitudinal direction of the flow path block.

  The above-described gas supply device used in the semiconductor manufacturing process may be configured to supply many types of gases. In this case, a plurality of gas supply units as described above are provided in parallel (see, for example, Patent Document 4 below).

Japanese Utility Model Publication No. 7-4980 Japanese Patent No. 2940292 JP 2001-227657 A JP 2006-46494 A

  For example, in a T-shaped flange joint, which is a conventional flange joint, provided along a direction (for example, horizontal) orthogonal to the pipe portion that extends perpendicularly (for example, upward) from the flange portion. Sometimes connected pipes. In the case of such a pipe connection structure, the tip of the pipe (hereinafter referred to as “bent part”) is bent in a substantially L shape toward the flange joint, and the bent part is connected to the above-described pipe part. At this time, it is possible to fit the pipe within the width of the flange joint by making the main part of the pipe (part other than the above-described bent part) parallel to the longitudinal direction of the flange.

  By the way, in such a configuration, the mounting direction of the mounting screw for mounting (fixing) the flange portion to another mounting target is also parallel to the tube portion. For this reason, in such a configuration, it is necessary to provide a space for inserting a mounting screw and a fastening tool (for example, obliquely from above) below the main part of the pipe. Therefore, in such a configuration, it is necessary to ensure a relatively long length of the bent portion. That is, in such a configuration, it is necessary to ensure a large space in the height direction of the pipe connection structure.

  Furthermore, when a large number of pipe connection structures as described above are arranged along the width direction of the flange joint, even if a large space in the height direction as described above is secured, the flange joints other than the end portions in the arrangement direction In contrast, it becomes extremely difficult to insert a mounting screw or a fastening tool.

  As illustrated above, in the conventional technology as described above, there is a demand for good miniaturization or integration of the device configuration. The present invention has been made in view of the circumstances exemplified above.

The first configuration of the present invention is as follows.
A pipe joint that is configured to be fixable to a predetermined mounting object by a screw and has a fluid passage inside,
It is a member formed in a substantially rectangular parallelepiped outer shape having a predetermined longitudinal direction, and is a plane provided so as to be joined to the mounting object with the height direction orthogonal to the longitudinal direction as a normal line A main body having a joining surface;
A first opening provided to open at the joint surface;
A second opening provided to open at one end in the longitudinal direction of the main body,
A hole formed along the height direction so that the screw can be inserted therethrough, with the first opening interposed therebetween, the one end side and the other end side in the longitudinal direction of the main body portion A pair of screw insertion holes provided in
Have
The fluid passage leading from the first opening to the second opening is formed so as to bypass the screw insertion hole.

According to a second configuration of the present invention, in the first configuration,
The fluid passage is
A first passage which is the fluid passage provided along the height direction from the first opening;
A fluid passage provided along the longitudinal direction so as to pass through the second opening and connect to the first passage, the second passage formed so as to bypass the screw insertion hole; ,
Have
The second passage is
A non-penetration formed along the longitudinal direction from the second opening so as not to reach the flow passage side screw insertion hole provided on the one end side of the main body portion of the pair of screw insertion holes. An opening-side passage that is a hole;
The channel side screw insertion hole is not communicated with the channel side screw insertion hole at a position closer to the side surface than the flow channel side screw insertion hole, which is a plane whose normal is the width direction perpendicular to the longitudinal direction and the height direction. An intermediate passage formed along the longitudinal direction so as to pass through the side of the screw insertion hole;
Have
The intermediate passage is provided such that one end communicates with the first passage and the other end communicates with an end of the opening-side passage on the flow passage side screw insertion hole side.

According to a third configuration of the present invention, in the first or second configuration,
The central axis of the second opening is configured to intersect the central axis of the first opening.

A fourth configuration of the present invention is a fluid supply control device including the pipe joint of the first to third configurations,
The fluid supply control device includes a flow path block having an internal flow path through which the fluid flows, and a plurality of fluid control devices mounted on the flow path block while being arranged along the internal flow path. And comprising
The pipe joint is configured to be connected to an inlet / outlet of the fluid provided in the flow path block with the flow path block as the mounting target.
The screw insertion hole is formed as a through hole having no screw part,
The joint surface is formed so as to be connected to an inlet / outlet of the fluid provided in the flow path block.

According to a fifth configuration of the present invention, in the fourth configuration,
The fluid control device is detachably attached to the flow channel block by a pair of female screw portions provided in the flow channel block,
The flow direction of the fluid in the flow path block includes a pair of female screw portions and a connection flow path that is the internal flow path provided in the flow path block so as to connect different fluid control devices. The plurality of fluid control devices that are parallel to each other are arranged in a substantially straight line along the arrangement direction of the fluid control devices.

According to a sixth configuration of the present invention, in the fifth configuration,
The female screw portion is formed as a non-through hole that opens on the mounting surface so that the fluid control device is mounted on the mounting surface side that is the surface on which the entrance / exit in the flow path block is formed,
The connection flow path is formed to bypass the female screw portion in a depth direction of the female screw portion.

According to a seventh configuration of the present invention, in the sixth configuration,
The flow path block is configured to be mountable while arranging a plurality of sets of the fluid control devices arranged in the arrangement direction in a direction orthogonal to the arrangement direction.

The eighth configuration of the present invention is:
The pipe connection structure includes a pair of the pipe joints,
One of the pair of pipe joints has the screw insertion hole which is the through hole not having a screw part, the other being the mounting target,
The other of the pair of pipe joints has the screw insertion hole, which is the non-through hole having the screw part as the attachment target.

According to a ninth configuration of the present invention, in the eighth configuration,
Each of the pair of pipe joints is configured such that the central axis of the second opening intersects the central axis of the first opening.

  In the pipe joint having the first configuration, the fluid passage leading from the first opening to the second opening is formed so as to bypass the screw insertion hole. The pipe joint having such a configuration is fixed (attached) to the attachment target by inserting the screw through the pair of screw insertion holes along the height direction.

  Here, the width direction (the direction perpendicular to the longitudinal direction and the height direction) to the extent that the second passage side of the pair of screw insertion holes and the second passage do not communicate with each other. By making it approach as close as possible, the dimension in the said width direction of the said main-body part can be made as small as possible. Therefore, according to such a configuration, it is possible to satisfactorily downsize or integrate the device configuration in the width direction.

  Further, according to this configuration, the pipe connected to the pipe joint, the screw and the fastening tool thereof do not interfere with each other, so that workability is improved and the space in the height direction as in the above-described conventional technique is obtained. It is no longer necessary to secure a large amount.

  According to the second configuration, it is possible to make the dimension of the main body portion in the width direction as small as possible.

  According to the third configuration, it is possible to provide the first opening and the second opening corresponding to the fluid inlet / outlet in the pipe joint so that their central axes intersect on the same plane. Therefore, the piping design becomes easy.

  In the fourth configuration, the pipe joint is fixed (attached) to the flow path block by the screw so that the joint surface is connected to the entrance / exit provided in the flow path block. . Furthermore, since the inlet / outlet pipe connected to the pipe joint does not interfere with the screw or the fastening tool when the pipe joint is attached to the flow path block, a large space is secured to avoid the interference. There is no need. Therefore, according to such a configuration, the configuration of the piping portion with respect to the flow path block is miniaturized as much as possible, so that the fluid supply control device can be satisfactorily miniaturized or integrated.

  In the fifth configuration, each of the plurality of fluid control devices is detachably attached (fixed) to the flow path block by the pair of female screw portions. In this specification, “removable” is not only “removable” but also a maintenance person of the fluid supply control device can perform a relatively simple attachment / detachment operation (such as screwing or releasing of a bolt). ) Can be easily attached and detached. The different fluid control devices are connected by the connection flow path.

  Here, in the flow channel block, a pair of the female screw portions for detachably mounting the fluid control device and the connection flow channel for connecting different fluid control devices are arranged in the array. It is provided on a substantially straight line along a direction (this is a direction parallel to the flow direction of the fluid in the flow path block).

  According to this configuration, the fluid supply control device can be miniaturized as much as possible in the width direction while the fluid control device is detachable from the flow path block. Therefore, according to this configuration, the fluid supply control device can be further reduced in size or integrated while maintaining good maintainability.

  According to the sixth configuration, the flow path block and the fluid supply control device can be miniaturized as much as possible in the width direction. Therefore, according to such a configuration, it is possible to satisfactorily meet demands for further miniaturization or integration in the fluid supply control device.

  According to the seventh configuration, the fluid supply control device capable of supplying a plurality of types of fluids by providing a plurality of the sets in parallel can be miniaturized as much as possible in the width direction. In particular, with the provision of a plurality of the sets in parallel, when forming a connection between the plurality of fluid pipes arranged in parallel and the flow path block, it is preferable to use the pipe joint. The structure of the connection portion can be miniaturized as much as possible in the width direction while maintaining maintainability.

  According to the eighth configuration, the joint surface in the pipe joint having the screw insertion hole which is a through hole not having the screw portion, and the screw insertion hole being a non-through hole having the screw portion. It is possible to join the joint surfaces of the pipe joint to each other and screw the screw into the screw portion. Thereby, a pair of said piping joint is joined mutually. According to such a configuration, the connection structure between the pipes can be miniaturized as much as possible in the width direction while maintaining good maintainability. In particular, when the connection structure is formed for each of the plurality of pipes arranged in parallel to each other, downsizing in the width direction can be favorably realized.

  According to the ninth configuration, the first opening and the second opening corresponding to the fluid inlet / outlet in the pipe joint can be provided such that their central axes intersect on the same plane. Therefore, the piping design becomes easy. Furthermore, by connecting the pair of pipe joints having such a configuration with the screws while joining the joint surfaces to each other, two pipes (the pipe connected to one of the pair of pipe joints and the other are connected). Can be connected while being arranged on a substantially straight line.

The flowchart which shows schematic structure of the flow path of the fluid in the gas supply apparatus which is one Embodiment of the fluid supply control apparatus of this invention. The top view which shows an example of a structure of the gas supply apparatus shown by FIG. FIG. 3 is a front view of the gas supply device (including one embodiment of the flow path block of the present invention) shown in FIG. 2. The front view which expanded one Embodiment of the flow-path block of this invention shown by FIG. The top view of the flow-path block shown by FIG. FIG. 6 is a side view of the flow path block shown in FIG. 5. 7-7 sectional drawing in FIG. The top view of the modification of the flow-path block of this invention. The front view of the flow-path block shown by FIG. The side view of the flow-path block shown by FIG. The top view which shows schematic structure of the fluid supply control apparatus of this invention. The front view of the fluid supply control apparatus shown by FIG. FIG. 12 is a bottom view of the fluid supply control device shown in FIG. 11. The front view which expanded the flow-path block shown by FIG. The top view which shows schematic structure of the fluid supply control apparatus of this invention. The front view of the fluid supply control apparatus shown by FIG. The bottom view of the fluid supply control apparatus shown by FIG. The front view which expanded the flow-path block shown by FIG. The perspective view which shows schematic structure of the fluid supply control apparatus which concerns on one modification of this invention. The disassembled perspective view of the fluid supply control apparatus which concerns on the other modification of this invention. The perspective view which expanded the 1st flow path block shown by FIG. The perspective view from another viewpoint of the 1st flow path block shown by FIG. The top view which shows an example of the piping joint which concerns on one Embodiment of this invention. The side view of the piping joint shown by FIG. The bottom view of the piping joint shown by FIG. The top view which shows another example of the piping joint which concerns on one Embodiment of this invention. The side view of the piping joint shown by FIG. The bottom view of the piping joint shown by FIG. A schematic configuration of a pipe joint structure according to an embodiment of the present invention formed by connecting the pipe joint shown in FIGS. 23 to 25 and the pipe joint shown in FIGS. 26 to 28. FIG. A schematic configuration of a pipe joint structure according to an embodiment of the present invention formed by connecting the pipe joint shown in FIGS. 23 to 25 and the pipe joint shown in FIGS. 26 to 28. FIG. The top view which shows the structure of the piping joint of the prior art as a comparative example. The top view which shows an example of a structure of the fluid supply control apparatus which concerns on one Embodiment of this invention. The side view of the fluid supply control apparatus shown by FIG. The side view which expanded the flow-path block shown by FIG. The side view which shows another example of a structure of the fluid supply control apparatus of this invention. The top view which shows the structure of the modification of the piping joint of this invention. The side view of the piping joint shown by FIG. The bottom view of the pipe joint shown by FIG. The top view which shows the structure of the other modification of the piping joint of this invention. The side view of the piping joint shown by FIG. The bottom view of the piping joint shown by FIG. Sectional drawing of a fluid control valve. The PV section expanded sectional view of FIG. Sectional drawing of a valve part. Sectional drawing of a piston. FIG. The exploded view at the time of the assembly of a fluid control valve. Sectional drawing of the modification of a fluid control valve. Sectional drawing of the other modification of a fluid control valve. Sectional drawing of the reference example of a fluid control valve. Sectional drawing of the flow-path periphery in a valve | bulb mounting block. Sectional drawing of the flow-path periphery in a valve | bulb mounting block. Sectional drawing of the conventional fluid control valve. Sectional drawing of the conventional fluid control valve.

  Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In addition, since a modification will prevent understanding of the description of coherent embodiment if it is inserted during description of one embodiment, it is described collectively at the end.

<Overall Configuration of Gas Supply Device of Embodiment>
First, a schematic configuration of a fluid flow path in a gas supply device 10 which is an example (one embodiment) of a fluid supply control device according to the present invention will be described with reference to FIG. The gas supply device 10 is used in a semiconductor manufacturing process (for example, an etching process), and is configured to be able to use a plurality of (eight in the drawing in FIG. 1) process gases. That is, the gas supply device 10 is configured to be able to supply a supply gas (a mixed gas obtained by mixing a plurality of process gases or a single process gas) to a supply destination (process chamber) (not shown).

  Specifically, in the gas supply device 10, gas supply units 10A, 10B, 10C, 10D, 10E, 10F, 10G, and 10H are provided in parallel. The gas supply units 10A to 10H are respectively connected to different process gas inflow lines 11 (process gas inflow lines 11A, 11B, 11C, 11D, 11E, 11F, 11G, and 11H). Different types of process gases are introduced into the process gas inflow lines 11A to 11H, respectively.

  A purge gas inflow line 12 is connected to the gas supply units 10A to 10H. The purge gas inflow line 12 is provided to supply a purge gas that is an inert gas (for example, nitrogen gas) to the gas supply units 10A to 10H. Further, a process gas supply line 13 is connected to the gas supply units 10A to 10H.

  That is, the gas supply units 10A to 10H include a process gas supplied from a process gas supply source (not shown) via the process gas inflow line 11, and a purge gas supplied from a purge gas supply source (not shown) via the purge gas inflow line 12. Alternatively, it is configured to flow toward the process gas supply line 13. Then, the gas supply apparatus 10 operates the gas supply units 10A to 10H so as to supply the process gas to the process gas supply line 13, thereby supplying the above-described supply gas via the process gas supply line 13. It is comprised so that it may supply to a supply destination.

  The gas supply units 10A to 10H have the same configuration. Therefore, the configuration of the gas supply unit 10A will be mainly described below.

  An internal main gas flow path 14 and an internal purge gas flow path 15 are formed in the gas supply unit 10A. The internal main gas flow path 14 and the internal purge gas flow path 15 are gas flow paths formed inside the gas supply unit 10A. The internal main gas flow path 14 is provided between the process gas inflow line 11 and the process gas supply line 13. That is, the process gas inflow line 11 is connected to the process gas supply line 13 via the internal main gas flow path 14. The internal purge gas flow path 15 is a purge gas flow path, and is provided to connect the purge gas inflow line 12 and the internal main gas flow path 14.

  The gas supply unit 10A includes a flow rate controller 16 as a module. The flow rate controller 16 is interposed on the downstream side (process gas supply line 13 side) in the flow direction of the process gas with respect to the internal main gas flow path 14 from the connection point with the internal purge gas flow path 15. The flow direction of the process gas in the gas supply unit 10A or the like is hereinafter referred to as “gas flow direction”. The flow rate controller 16 is a so-called “mass flow controller”, and can output a detection signal corresponding to the mass flow rate of the gas in the internal main gas flow path 14. It can be controlled by a control signal from a microcomputer or the like.

  The gas supply unit 10A includes a fluid control valve 17 (including a fluid control valve actuator 17a), a fluid control valve 18 (including a fluid control valve actuator 18a), and a fluid control valve 19 (a fluid control valve actuator) as modules. 19a). The fluid control valve 17 is interposed in the internal main gas flow path 14 on the upstream side (the process gas inflow line 11 side) in the gas flow direction with respect to the above-described connection location. The fluid control valve 18 is interposed in the internal purge gas flow path 15. The fluid control valve 19 is interposed in the internal main gas flow path 14 on the downstream side in the gas flow direction from the flow rate controller 16.

  The fluid control valve 17 is an on-off valve having a configuration as a so-called “air operated valve”, and a joint portion for connecting an air pipe for on-off control is provided at an end of the fluid control valve actuator 17a. (The same applies to the fluid control valves 18 and 19). The fluid control valve 17 is provided so as to be able to switch between inflow of process gas from the process gas inflow line 11 toward the flow rate controller 16 and blocking of the process gas. The fluid control valve 18 is provided so as to be able to switch between the flow of purge gas into the internal main gas flow path 14 and the blocking thereof. The fluid control valve 19 is provided so as to be able to switch between the inflow of gas toward the process gas supply line 13 and the shutoff thereof.

  Referring to FIG. 2, in the gas supply units 10A to 10H, the fluid control valve 17, the fluid control valve 18, the flow rate controller 16, and the fluid control valve 19 are arranged in this order in the gas flow direction. The fluid control valves 17 to 19 and the flow rate controller 16 are arranged in a substantially straight line along the gas flow direction (specifically, in parallel with the gas flow direction). Hereinafter, the direction in which the fluid control valve 17, the fluid control valve 18, the flow rate controller 16, and the fluid control valve 19 in the gas supply unit 10 </ b> A and the like are arranged is referred to as “device arrangement direction”. In this configuration, the gas flow direction is parallel to the device arrangement direction, and is one direction from the fluid control valve 17 to the fluid control valve 19 via the fluid control valve 18 and the flow rate controller 16 (from the left in FIG. 2). (Toward the right)).

  Further, in this configuration, the flow rate controllers 16 in the gas supply units 10A to 10D are arranged at substantially the same position in the gas flow direction (the same applies to the fluid control valves 17 to 19). That is, each flow rate controller 16 in the gas supply units 10A to 10D is substantially straight along the width direction (the gas flow direction and the direction perpendicular to the thickness direction of the flow path block 20 described later: the vertical direction in FIG. 2). Are arranged in a shape. Similarly, the flow rate controllers 16 in the gas supply units 10E to 10H are disposed at substantially the same position in the gas flow direction (the same applies to the fluid control valves 17, 18 and 19).

  The gas supply device 10 (gas supply unit 10A) includes the above-described flow path block 20 (attachment target), which is a substantially flat plate-like member. In this configuration, the flow rate controller 16 and the fluid control valves 17, 18 and 19 are detachably mounted (fixed) on the flow path block 20 while being arranged in the device arrangement direction. The fluid control valve 17, the fluid control valve 18, the flow rate controller 16, and the fluid control valve 19 are mounted in the flow path block 20 while being arranged in the device arrangement direction in this order, so that The formed gas flow path (details will be described later) is connected so as to be able to exchange gas. That is, the flow path block 20 is connected in this order by mounting the fluid control valve 17, the fluid control valve 18, the flow rate controller 16, and the fluid control valve 19 in a state of being arranged in the device arrangement direction. It is configured.

  The flow path block 20 includes a plurality of sets of the fluid control valve 17, the fluid control valve 18, the flow rate controller 16, and the fluid control valve 19 arranged in the device arrangement direction in the width direction (in this specific example). 4) is configured to be mountable. Specifically, in this configuration, one flow path block 20 is configured to be able to be mounted while arranging a plurality of gas supply units 10A to 10D in the width direction. The flow path block 20 is integrally formed in a non-separable manner (specifically, seamlessly integrated) across the plurality of gas supply units 10A to 10D. Similarly, the other flow path block 20 is configured such that a plurality of gas supply units 10E to 10H can be mounted while being arranged in the width direction. The flow path block 20 is integrally formed in a non-separable manner (specifically, seamlessly integrated) over the plurality of gas supply units 10E to 10H.

  That is, in this configuration, the gas supply device 10 includes a flow path block 20 (unseparably integrated) corresponding to the gas supply units 10A to 10D and a flow path block 20 (unseparable) corresponding to the gas supply units 10E to 10H. Integrated). The two are connected to each other in an adjacent state so that supply gas and purge gas can be exchanged.

<Schematic configuration of flow path block of embodiment>
3-7 has shown the detail of the structure of the flow-path block 20 which concerns on one Embodiment of this invention. Hereinafter, the specific configuration of the flow path block 20 of the present embodiment will be described in detail with reference to FIGS. 3 to 7 and with reference to other drawings as necessary.

  Referring to FIGS. 2 and 3, in the gas supply units 10 </ b> A to 10 </ b> D and 10 </ b> E to 10 </ b> H, the flow rate controller 16 and the fluid control valves 17, 18, and 19 are the upper surface 20 a that is one surface of the flow path block 20. It is mounted on the (mounting surface) side. In addition, one surface of the flow path block 20 opposite to the upper surface 20a is hereinafter referred to as a “lower surface 20b”. The surface of the flow path block 20 that is orthogonal to the upper surface 20a and the lower surface 20b and whose normal direction is the width direction is hereinafter referred to as an “end surface 20c”.

  Hereinafter, first, referring to FIG. 2 to FIG. 4, connection between the fluid control valve 17, the fluid control valve 18, the flow rate controller 16, and the fluid control valve 19 and gas supply in one flow path block 20. A schematic configuration of the internal gas flow path regarding the interconnection between the units 10A to 10D will be described.

  The flow path block 20 is a substantially plate-like member formed of stainless steel, and is configured to flow the process gas in the gas flow direction described above, that is, the device arrangement direction. . Specifically, a substantially U-shaped connection channel 21 is formed inside the channel block 20. The connection flow path 21 constituting the “first flow path” of the present invention is provided at a position on the upstream side in the gas flow direction of the flow path block 20 (position closer to the upstream end in the gas flow direction). Yes.

  The connection flow path 21 is substantially straight along the gas flow direction in plan view (when viewed in the thickness direction of the flow path block 20) so that the process gas flows in the gas flow direction described above. It is formed in a shape. Specifically, the connection flow path 21 has an inlet port 21a and an outlet port 21b that open at the upper surface 20a. That is, the inlet port 21 a is an inflow port for the process gas from the process gas inflow line 11, and is provided at an upstream end portion in the gas flow direction of the connection channel 21. Similarly, the outlet port 21b is an outlet for the process gas flowing in from the inlet port 21a, and is provided at the downstream end of the connection channel 21 in the gas flow direction.

  An inlet passage 21c is formed from the inlet port 21a toward the lower surface 20b. Similarly, an outlet passage 21d is formed from the outlet port 21b toward the lower surface 20b. The inlet passage 21c and the outlet passage 21d are cylindrical holes and are provided in parallel with the thickness direction of the flow path block 20.

  End portions of the inlet passage 21c and the outlet passage 21d on the lower surface 20b side are connected to each other by a connection path 21e. The connection path 21e is formed by welding (for example, laser welding or electron beam welding) with a flat plate-like (oval shape in plan view) formed of stainless steel in a groove formed from the lower surface 20b side. It is a space formed by hermetically closing and is provided in parallel with the gas flow direction.

  A connection flow path 22 is provided downstream of the connection flow path 21 in the gas flow direction and between the fluid control valves 17 and 18 and the flow rate controller 16. The connection flow path 22 constituting the “first flow path” of the present invention is formed along the gas flow direction inside the flow path block 20 so that the gas flows in the gas flow direction described above. It is a gas flow path. The connection channel 22 has the same structure as the connection channel 21 described above, and is provided so as to connect the fluid control valve 17 or 18 and the flow rate controller 16.

  Specifically, the connection channel 22 has an inlet port 22a, an outlet port 22b, an inlet channel 22c, an outlet channel 22d, a connection channel 22e, and a lid portion 22f, similar to the connection channel 21 described above. . The connection flow path 22 transmits the gas flowing into the inlet port 22a via the fluid control valve 17 or 18 to the outlet port 22b via the inlet passage 22c, the connection path 22e, and the outlet passage 22d, and is discharged from the outlet port 22b. Thus, the gas is provided so as to be able to flow from the fluid control valve 17 or 18 toward the flow rate controller 16.

  A connection channel 23 is provided at a position downstream of the connection channels 21 and 22 in the gas flow direction of the channel block 20. That is, the connection flow path 23 is provided at a downstream position (position near the downstream end) in the gas flow direction of the flow path block 20. The connection flow path 23 constituting the “first flow path” of the present invention is formed along the gas flow direction inside the flow path block 20 so that the gas flows in the gas flow direction described above. The gas flow path has the same structure as the connection flow paths 21 and 22 described above. The connection flow path 23 is provided so as to connect the flow rate controller 16 and the fluid control valve 19.

  Specifically, the connection channel 23 has an inlet port 23a, an outlet port 23b, an inlet channel 23c, an outlet channel 23d, a connection channel 23e, and a lid portion 23f, similar to the connection channels 21 and 22 described above. ing. The connection flow path 23 transmits the gas flowing into the inlet port 23a via the flow rate controller 16 to the outlet port 23b via the inlet passage 23c, the connection path 23e, and the outlet passage 23d and discharges it from the outlet port 23b. Thus, the gas is provided to flow from the flow rate controller 16 toward the fluid control valve 19.

  As described above, the connection channels 21, 22, and 23 are each formed substantially in a straight line along the gas flow direction in plan view. Moreover, the connection flow paths 21, 22, and 23 are arrange | positioned substantially linearly along the gas flow direction by planar view. Here, the fact that the connection channels 21, 22, and 23 are “arranged substantially in a straight line” does not necessarily require that their centers in a plan view are accurately positioned on a specific straight line. . That is, for example, if they are arranged so as to overlap a specific straight line in a plan view, it can be said that “they are arranged in a substantially straight line”.

  A purge gas supply port 24 is provided at a position corresponding to the fluid control valve 18 on the upper surface 20 a of the flow path block 20 so as to open toward the fluid control valve 18. The purge gas supply port 24 is disposed at a substantially point-symmetrical position with respect to the outlet port 21b in the connection flow path 21 with respect to the inlet port 22a in the connection flow path 22 in plan view. That is, the outlet port 21b in the connection flow path 21, the purge gas supply port 24, and the inlet port 22a in the connection flow path 22 are arranged in this order in a substantially straight line along the gas flow direction in plan view. Yes.

  The purge gas supply port 24 supplies purge gas to the fluid control valve 18 by communicating with an internal purge gas line 25 formed along the apparatus width direction so as to straddle a plurality of gas supply units 10A, 10B. It is formed to do. The internal purge gas line 25 constituting the “second flow path” of the present invention is a purge gas flow path formed inside the flow path block 20 and is connected to the purge gas inflow line 12 (see FIG. 1). A short gas flow path parallel to the thickness direction of the flow path block 20 is formed between the purge gas supply port 24 and the internal purge gas line 25. That is, each purge gas supply port 24 corresponding to the gas supply units 10A to 10D is connected to the internal purge gas line 25 via the short gas flow path described above.

  In the present embodiment, the internal purge gas line 25 is provided at a position corresponding to the fluid control valve 18 (substantially directly below the fluid control valve 18). Specifically, the internal purge gas line 25 is disposed such that the position in the device arrangement direction in plan view substantially coincides with the purge gas supply port 24.

  A process gas supply port 26 is provided at a position corresponding to the fluid control valve 19 on the upper surface 20 a of the flow path block 20 so as to open toward the fluid control valve 19. The process gas supply port 26 communicates with the supply-side internal gas line 27 formed along the apparatus width direction so as to straddle the plurality of gas supply units 10A, 10B,. It forms so that the gas which passed may be supplied to the supply side internal gas line 27. FIG.

  The supply-side internal gas line 27 constituting the “second flow path” of the present invention is a gas flow path formed inside the flow path block 20 and is connected to the process gas supply line 13 (see FIG. 1). ing. Further, a short gas flow path parallel to the thickness direction of the flow path block 20 is formed between the process gas supply port 26 and the supply side internal gas line 27. That is, each process gas supply port 26 corresponding to the gas supply units 10A to 10D is connected to the supply-side internal gas line 27 via the short gas flow path described above.

  In the present embodiment, the supply-side internal gas line 27 is provided at a position corresponding to the fluid control valve 19 (substantially directly below the fluid control valve 19). Specifically, the supply-side internal gas line 27 is disposed so that the position in the device arrangement direction in plan view substantially coincides with the process gas supply port 26.

  As described above, the gas supply unit 10A or the like controls the process gas flowing from the process gas inflow line 11 into the inlet port 21a in the connection flow path 21 or the purge gas flowing into the internal purge gas line 25 from the purge gas inflow line 12. Alternatively, the valves 17 and 18 can be supplied to the supply-side internal gas line 27 via the connection flow path 22, the flow rate controller 16, the connection flow path 23, and the fluid control valve 19. That is, the gas supply units 10 </ b> A to 10 </ b> D (10 </ b> E to 10 </ b> H) are connected to each other through the internal purge gas line 25 and the supply-side internal gas line 27 so as to be able to exchange gas.

  On the upper surface 20a side of the flow path block 20, female screw portions 28a, 28b, 28c, and 28d are provided. The female screw portions 28 a, 28 b, 28 c and 28 d are so-called “screw holes” and are formed so that the axial direction (depth direction) is parallel to the thickness direction of the flow path block 20.

  The pair of female screw portions 28 a are provided at positions corresponding to the inflow side flange 30. The pair of female screw portions 28 b are provided at positions corresponding to the fluid control valves 17 and 18. The pair of female screw portions 28 c are provided at positions corresponding to the flow rate controller 16. The pair of female screw portions 28 d are provided at positions corresponding to the fluid control valve 19. The pair of female screw portions 28a, the pair of female screw portions 28b, the pair of female screw portions 28c, and the pair of female screw portions 28d are arranged in this order along the gas flow direction (device arrangement direction). They are arranged in a substantially straight line.

  The pair of female screw portions 28 a corresponding to the inflow side flange 30 are arranged in the device arrangement direction on both sides of the connection channel 21 with the inlet port 21 a interposed therebetween. One inflow side flange 30 is provided for each of the gas supply units 10A to 10H. The inflow side flange 30 in the gas supply unit 10A is a piping flange for connecting the process gas inflow line 11A and the inlet port 21a, and is formed in a substantially inverted T shape in front view (the gas supply unit). The inflow side flange 30 in 10B to 10H has the same configuration).

  The inflow side flange 30 that is one of the modules is composed of a flange portion 31 and a pipe portion 32. The flange portion 31 is a substantially I-shaped plate-like member in plan view, and is hermetically joined to the upper surface 20 a of the flow path block 20. The pipe portion 32 is erected substantially vertically from the flange portion 31. The flange portion 31 has a width (dimension in the width direction described above: the same applies hereinafter) slightly larger than the outer diameter of the pipe portion 32 and the mounting bolt 33, and the flow rate controller 16 and the fluid control valves 17 to 19. It is formed to be substantially the same as the width (width of the fluid control valve actuators 17a to 19a).

  A through hole (not shown) through which the mounting bolt 33 is inserted is formed in the flange portion 31 at a position corresponding to the female screw portion 28a. And the inflow side flange 30 is airtightly mounted with respect to the upper surface 20a side in the flow path block 20 by screwing the mounting bolts 33 to the pair of female screw portions 28a (such mounting positions). Since the hermetic seal structure is well known, illustration and explanation are omitted: the same applies hereinafter). That is, the pair of female screw portions 28 a is provided so that the inflow side flange 30 can be detachably attached to the flow path block 20.

  One of the pair of female screw portions 28b corresponding to the fluid control valves 17 and 18 is an outlet port 21b in the connection flow path 21 and a downstream side in the gas flow direction of the pair of female screw portions 28a (right side in FIG. 4). ) And the one in between. The other of the pair of female screw portions 28 b is provided at a position between the purge gas supply port 24 and the outlet port 22 b in the connection flow path 22.

  In the present embodiment, the fluid control valves 17 and 18 are fixed to the flow path block 20 while being integrated via a common valve mounting block 40. That is, the fluid control valve actuators 17a and 18a are attached in advance to the same valve attachment block 40. The valve mounting block 40 is formed in a substantially I shape in plan view. Further, the valve mounting block 40 is formed so that the width thereof is slightly larger than the outer diameter of the mounting bolt 41 and is substantially the same as the widths of the flow rate controller 16 and the fluid control valve actuators 17a to 19a. . In this valve mounting block 40, there is a portion in the vicinity of the valve body in the fluid control valve actuator 17a from the outlet port 21b in the connection flow path 21 (the configuration of such a portion is well known, so illustration and description are omitted: the same applies hereinafter) Through the internal gas flow path (not shown) reaching the inlet port 22a in the connection flow path 22 and from the purge gas supply port 24 to the inlet port 22a in the connection flow path 22 through the vicinity of the valve body in the fluid control valve actuator 18a. And an internal gas flow path (not shown) is formed. The fluid control valve 17 (18) is configured by attaching the fluid control valve actuator 17a (18a) to the valve mounting block 40 having the above-described configuration.

  In addition, a through hole (not shown) for inserting the mounting bolt 41 is formed at a position corresponding to the female screw portion 28 b in the valve mounting block 40. The fluid control valves 17 and 18 are hermetically sealed with respect to the upper surface 20a side of the flow path block 20 via the common valve mounting block 40 by screwing the mounting bolts 41 to the pair of female screw portions 28b. Is installed. That is, in the present embodiment, the fluid control valves 17 and 18 are integrally formed, in other words, the fluid control valve actuators 17a and 18a and the valve mounting block 40 to which these are mounted in advance are attached to the flow path block 20. On the other hand, one detachable module (detachable module) is configured. The pair of female screw portions 28b are provided so that the fluid control valves 17 and 18 (the valve mounting block 40 to which the fluid control valve actuators 17a and 18a are previously attached) can be detachably attached to the flow path block 20. It has been.

  One of the pair of female screw portions 28 c corresponding to the flow rate controller 16 is between the downstream one of the pair of female screw portions 28 b in the gas flow direction and the outlet port 22 b in the connection flow path 22. In the position. The other of the pair of female screw portions 28 c is provided at a position between the inlet port 23 a and the outlet port 23 b in the connection flow path 23.

  In the present embodiment, the flow rate controller 16 is provided with an MFC attachment 50. The MFC attachment part 50 is formed in a substantially I shape in plan view. Further, the width of the MFC mounting portion 50 is slightly larger than the outer diameter of the mounting bolt 51, and the portion above the MFC mounting portion 50 in the flow rate controller 16 and the fluid control valves 17 to 19 (fluid control valves). It is formed so as to be substantially the same as the width of the actuators 17a to 19a). The MFC attachment 50 includes an internal gas flow path (not shown) from the outlet port 22 b in the connection flow path 22 to the flow rate controller 16, and a gas that has passed through the flow rate controller 16 at the inlet of the connection flow path 23. An internal gas flow path (not shown) reaching the port 23a is formed.

  Further, a through hole (not shown) for inserting the mounting bolt 51 is formed at a position corresponding to the female screw portion 28 c in the MFC mounting portion 50. The flow rate controller 16 is airtightly attached to the upper surface 20a side of the flow path block 20 by screwing the mounting bolts 51 into the pair of female screw portions 28c. That is, the pair of female screw portions 28 c are provided so that the flow rate controller 16 (MFC attachment portion 50) can be detachably attached to the flow path block 20.

  One of the pair of female screw portions 28 d corresponding to the fluid control valve 19 is between the downstream one of the pair of female screw portions 28 c in the gas flow direction and the outlet port 23 b in the connection flow path 23. In the position. The other of the pair of female screw portions 28d is provided downstream of the process gas supply port 26 in the gas flow direction, that is, at the downstream end of the flow path block 20 in the gas flow direction.

  In the present embodiment, the fluid control valve 19 is configured by attaching the fluid control valve actuator 19 a to the valve mounting block 60 in advance. The valve mounting block 60 is formed in a substantially I shape in plan view. Further, the valve mounting block 60 is formed so that the width thereof is slightly larger than the outer diameter of the mounting bolt 61 and substantially the same as the widths of the flow rate controller 16 and the fluid control valve actuators 17a to 19a. . The valve mounting block 60 is formed with an internal gas flow path (not shown) extending from the outlet port 23b in the connection flow path 23 to the process gas supply port 26 via the vicinity of the valve body in the fluid control valve actuator 19a. Yes.

  Further, a through hole (not shown) through which the mounting bolt 61 is inserted is formed at a position corresponding to the female screw portion 28 d in the valve mounting block 60. The fluid control valve 19 is airtightly attached to the upper surface 20a side of the flow path block 20 via the valve attachment block 60 by screwing attachment bolts 61 to the pair of female screw portions 28d. ing. That is, the pair of female screw portions 28d are provided so that the fluid control valve 19 (the valve mounting block 60 to which the fluid control valve actuator 19a is previously attached) can be detachably attached to the flow path block 20.

  In the present embodiment, the female screw portion 28a, the connection flow path 21 (including the inlet port 21a, the inlet passage 21c, the connection path 21e, the outlet passage 21d, and the outlet port 21b), the female screw portion 28b, the connection flow path 22 ( The purge gas supply port 24, female screw portion 28c, connection flow path 23 (same as above), process gas supply port 26, and female screw portion 28d are arranged in a substantially straight line along the device arrangement direction. The female screw portions 28a, 28b, 28c, and 28d are formed as non-through holes that open at the upper surface 20a. That is, the connection flow paths 21, 22, and 23 are formed so as to bypass the female screw portions 28a to 28d in the depth direction of the female screw portions 28a to 28d. Specifically, the female screw portions 28a to 28d are formed so as not to communicate with the connection flow paths 21 to 23.

  The internal main gas flow path 14 in FIG. 1 is an internal gas flow path formed in the connection flow paths 21 to 23 and the fluid control valve 17 (an internal gas flow path formed in the valve mounting block 40 and connected flow). The flow path from the outlet port 21b in the passage 21 to the inlet port 22a in the connection flow path 22 via the fluid control valve actuator 17a), the internal gas flow path formed in the flow rate controller 16, and the fluid control valve 19 Internal gas flow path (the internal gas flow path formed in the valve mounting block 60 and the flow path from the outlet port 23b in the connection flow path 23 to the process gas supply port 26 via the fluid control valve actuator 19a) and the process gas This corresponds to a gas flow path from the supply port 26 to the supply-side internal gas line 27. Further, the internal purge gas flow path 15 in FIG. 1 is a purge gas flow path from the internal purge gas line 25 to the purge gas supply port 24, an internal gas flow path formed in the valve mounting block 40, and from the purge gas supply port 24 to the fluid control valve. 18 corresponds to the flow path leading to the inlet port 22a in the connection flow path 22 and the internal purge gas line 25.

<The principal part structure of the flow-path block of embodiment>
Next, with regard to the configuration relating to the connection between the internal purge gas lines 25 and the supply-side internal gas lines 27 in the adjacent flow path blocks 20 in a state where the plurality of flow path blocks 20 are arranged adjacent to each other in the width direction, FIG. Description will be made with reference to FIG. FIG. 7 shows only an enlarged cross-sectional view of a connection portion between the internal purge gas lines 25 in the adjacent flow path block 20. But since the connection part of the supply side internal gas lines 27 in the adjacent flow path block 20 is also the same structure, illustration of the expanded sectional view about this part is abbreviate | omitted.

  The flow path block 20 includes a first connection piece 201 and a second connection piece 202 that constitute the “connection portion” of the present invention. The first connection piece 201 protrudes from the one end in the width direction (the right end in FIG. 6) in the width direction (that is, toward the outside) on the lower surface 20b side. The second connecting piece 202 protrudes in the width direction from the other end in the width direction on the upper surface 20a side. That is, as shown in FIG. 6, the first connection piece 201 and the second connection piece 202 are provided at diagonal positions when viewed along the device arrangement direction.

  In the present embodiment, the first connection piece 201 and the second connection piece 202 are the main body portion of the flow channel block 20 (the rectangular parallelepiped portion constituting the main part of the flow channel block 20 and the lid portion 21f, etc. It is formed in one piece without any joints. Moreover, the 1st connection piece 201 and the 2nd connection piece 202 are provided over the full length of the flow-path block 20 about an apparatus arrangement direction. The internal purge gas line 25 welds an opening portion of a non-through hole formed along the width direction from the second connection piece 202 side with a substantially cylindrical blocking member formed of stainless steel (for example, laser welding or electron beam). It is formed by hermetically closing by welding or the like. The supply side internal gas line 27 is formed in the same manner.

  A first connection opening 211 is provided at a position corresponding to the internal purge gas line 25 and the supply-side internal gas line 27 in the device arrangement direction on the surface of the first connection piece 201 (surface opposite to the lower surface 20b). Is formed. The first connection opening 211 is provided so as to open in a direction from the lower surface 20b side to the upper surface 20a side (that is, upward in FIG. 6).

  The first connection opening 211 corresponding to the internal purge gas line 25 is indicated as “211a” in the drawing and may be referred to as “first connection opening 211a” in the following description. Similarly, the first connection opening 211 corresponding to the supply-side internal gas line 27 is indicated as “211b” in the drawing and may be referred to as “first connection opening 211b” in the following description. In the following description, the “first connection opening 211a” and the “first connection opening 211b” may be collectively referred to as the “first connection opening 211”.

  The first connection opening 211 a is connected to one end (the end on the first connection piece 201 side) in the width direction of the internal purge gas line 25 via the first connection path 212. That is, the internal purge gas line 25 is formed as a non-through hole in the width direction. The first connection path 212 is a gas passage inside the flow path block 20 and is formed to connect the above-described one end of the internal purge gas line 25 and the first connection opening 211a. .

  In the present embodiment, the first connection path 212 is formed in a substantially U shape in a side sectional view, like the above-described connection flow path 21 and the like. Specifically, the first connection path 212 includes a straight pipe portion 213, a straight pipe portion 214, and a connection passage portion 215. The straight pipe portion 213 is a substantially cylindrical gas passage formed from the first connection opening 211 a toward the lower surface 20 b, and is connected to one end of the connection passage portion 215. The straight pipe portion 214 is a substantially cylindrical gas passage formed from one end portion of the internal purge gas line 25 toward the lower surface 20b, and is connected to the other end portion of the connection passage portion 215. Has been. The connection passage portion 215 is welded (for example, laser welding or electron beam welding) with a flat plate-like (oval shape in plan view) formed of stainless steel in a groove formed from the lower surface 20b side, etc. Is a space formed by airtightly closing, and is formed along the width direction.

  In the present embodiment, the connection configuration between the first connection opening 211b and the supply-side internal gas line 27 is the same as the connection configuration between the first connection opening 211a and the internal purge gas line 25 described above. . Therefore, the first connection opening 211b is connected to one end (the end on the first connection piece 201 side) in the width direction of the supply-side internal gas line 27 via the first connection path 212. That is, the supply side internal gas line 27 is formed as a non-through hole in the width direction. And the 1st connection path 212 which connects the 1st connection opening part 211b and the supply side internal gas line 27 is formed similarly to the above-mentioned.

  As shown in FIGS. 5 and 7, connection bolt screw holes 217 are provided on both sides of the first connection opening 211, respectively. The connection bolt screwing hole 217 is a screw hole (through hole) provided along the thickness direction of the first connection piece 201 and is formed so that the connection bolt B can be screwed (fastened). In the present embodiment, the pair of connecting bolt screw holes 217 are arranged along the device arrangement direction. That is, the pair of connecting bolt screw holes 217 are provided substantially symmetrically with the first connection opening 211 interposed therebetween.

  A second connection opening 221 is formed at a position corresponding to the internal purge gas line 25 and the supply-side internal gas line 27 in the device arrangement direction on the bottom surface (the surface opposite to the upper surface 20a) of the second connection piece 202. Has been. The second connection opening 221 is provided so as to open in a direction from the upper surface 20a side to the lower surface 20b side (that is, downward in FIG. 6).

  The second connection opening 221 corresponding to the internal purge gas line 25 is indicated as “221a” in the drawing and may be referred to as “second connection opening 221a” in the following description. Similarly, the second connection opening 221 corresponding to the supply-side internal gas line 27 is indicated as “221b” in the drawing and may be referred to as “second connection opening 221b” in the following description. In the following description, the “second connection opening 221a” and the “second connection opening 221b” may be collectively referred to as “second connection opening 221”.

  The second connection opening 221 a is connected to a position near the other end in the width direction of the internal purge gas line 25 via the second connection path 222. The second connection path 222 is a gas passage formed inside the flow path block 20 so as to connect the other end of the internal purge gas line 25 to the second connection opening 221a. Specifically, in the present embodiment, the second connection path 222 is a substantially cylindrical gas path, and is directed from the second connection opening 221a toward the internal purge gas line 25 (that is, toward the upper surface 20a side). Formed).

  In the present embodiment, the connection configuration between the second connection opening 221b and the supply-side internal gas line 27 is the same as the connection configuration between the second connection opening 221a and the internal purge gas line 25. Therefore, the second connection opening 221 b is connected to the other end (the end on the second connection piece 202 side) in the width direction of the supply-side internal gas line 27 via the second connection path 222. And the 2nd connection path 222 which connects the 2nd connection opening part 221b and the supply side internal gas line 27 is formed similarly to the above-mentioned.

  As shown in FIGS. 5 and 7, connection bolt insertion holes 227 are provided on both sides of the second connection opening 221, respectively. The connection bolt insertion hole 227 is a through hole provided along the thickness direction of the second connection piece 202 and is formed so that the connection bolt B described above can be inserted. Specifically, the connecting bolt insertion hole 227 is formed such that its inner diameter is slightly larger than the outer diameter of the connecting bolt B. In the present embodiment, the pair of connecting bolt insertion holes 227 are arranged along the device arrangement direction. That is, the pair of connecting bolt insertion holes 227 are provided substantially symmetrically with the second connection opening 221 interposed therebetween.

  In the present embodiment, the first connection piece 201 and the second connection piece 202 are formed so that the first connection opening 211 and the second connection opening 221 are at the same position in the device arrangement direction. That is, the two flow path blocks 20 are arranged adjacent to each other in the width direction so as to substantially coincide with each other in the device arrangement direction, and the first connection piece 201 and the other second connection piece 202 are overlapped with each other. In view, the first connection opening 211a and the second connection opening 221a face each other, and the first connection opening 211b and the second connection opening 221b face each other. 211 and a second connection opening 221 are provided. Similarly, the connection bolt insertion hole 227 is provided so as to surround the connection bolt screwing hole 217 in a plan view in the above-described state.

  In the present embodiment, each of the first connection opening 211 and the second connection opening 221 is provided with a step portion that can accommodate a seal member when airtightly bonding the two while facing each other. Yes. As described above, the first connection piece 201 and the second connection piece 202 are stacked in the thickness direction so that the first connection opening 211 and the second connection opening 221 face each other. The internal purge gas lines 25 and the supply-side internal gas lines 27 in the path block 20 are connected to each other.

<Operation / Effects of Configuration of Embodiment>
In the configuration of the present embodiment as described above, the fluid control valve 17, the fluid control valve 18, the flow rate controller 16, and the fluid control valve 19 (these are mounted on the flow path block 20) arranged in the device arrangement direction. The gas supply units 10A to 10D including the gas supply units 10A to 10D are attached to the flow path block 20 in a state of being arranged in the width direction. Then, the gas supply units 10A to 10D are connected by the internal purge gas line 25 and the supply-side internal gas line 27 provided inside the flow path block 20 so as to be able to exchange gas. The same applies to the gas supply units 10E to 10H.

  Here, in such a configuration, the flow path block 20 to which the gas supply units 10A to 10D are mounted and the flow path block 20 to which the gas supply units 10E to 10H are mounted are adjacently arranged in parallel in the width direction. . Then, in the gas supply units 10A to 10H, the respective flow rate controllers 16 are arranged at substantially the same position in the gas flow direction, that is, the device arrangement direction (the same applies to the fluid control valves 17 to 19).

  In this state, two adjacent flow path blocks 20 are joined (connected) to each other by the first connection piece 201 and the second connection piece 202. As a result, the internal purge gas lines 25 and the supply-side internal gas lines 27 are connected so as to be able to exchange gas.

  Specifically, the first connection opening 211 in one channel block 20 and the second connection opening 221 in the other channel block 20 are opposed to each other with the above-described seal member interposed therebetween. The piece 201 and the second connection piece 202 are overlapped in the thickness direction. Then, the connecting bolt B is screwed into the connecting bolt screwing hole 217 while being inserted into the connecting bolt insertion hole 227. As a result, the flow path block 20 to which the gas supply units 10A to 10D are mounted and the flow path block 20 to which the gas supply units 10E to 10H are mounted are connected (coupled).

  As described above, according to the configuration of the present embodiment, the plurality of flow path blocks 20 are arranged adjacent to each other in parallel, and both are connected by the first connection piece 201 and the second connection piece 202. As the number of types increases, it is possible to satisfactorily meet the requirement of providing a large number of gas supply units 10A and the like in parallel. Therefore, according to this configuration, the gas supply device 10 can be favorably downsized or integrated while maintaining good maintainability.

  Specifically, according to the configuration of the present embodiment as described above, the piping length of the entire gas supply device 10 can be suppressed as much as possible. In the configuration of the present embodiment, the first connection opening 211 and the second connection opening 221 are provided at the same position in the device arrangement direction. Therefore, according to such a configuration, it is possible to further reduce the size of the entire gas supply device 10 in the device arrangement direction as compared with the related art.

  Further, in the configuration of the present embodiment, the inflow side flange 30 is detachably attached to the flow path block 20 by a pair of female screw portions 28a. Similarly, the fluid control valves 17 and 18 are detachably attached to the flow path block 20 by a pair of female screw portions 28b. The flow rate controller 16 is detachably attached to the flow path block 20 by a pair of female screw portions 28c. Further, the fluid control valve 19 is detachably attached to the flow path block 20 by a pair of female screw portions 28d.

  Then, the inflow side flange 30 and the fluid control valves 17 and 18 are connected by the connection flow path 21. Similarly, the fluid control valves 17 and 18 and the flow rate controller 16 are connected by a connection flow path 22. Further, the flow controller 16 and the fluid control valve 19 are connected by a connection flow path 23. And these connection flow paths 21-23 are arrange | positioned on the substantially same straight line as the female screw parts 28a-28d, and are formed so that these may be detoured in the depth direction.

  Therefore, according to the above-described configuration, the widths of the inflow side flange 30, the valve mounting block 40, the MFC mounting portion 50, and the valve mounting block 60 are minimized (specifically, the flow rate controller 16 and the fluid control valve actuators 17a to 17a). Even if it is set to be substantially the same as the width of 19a, the flow controller 16 and the fluid control valves 17 to 19 can be satisfactorily attached to and detached from the flow path block 20. In other words, these can be satisfactorily attached to and detached from the flow path block 20 without using four mounting bolts in a substantially rectangular shape in plan view. Therefore, according to such a configuration, the width of each gas supply unit 10A and the like and the entire width of the gas supply device 10 can be made as small as possible. Therefore, the gas supply device 10 has good maintainability. It is possible to further reduce the size while holding.

  Further, in the configuration of the present embodiment, the inflow side flange 30, the flow rate controller 16, and the fluid control valves 17 to 19 are concentrated on the upper surface 20 a side in the flow path block 20. Therefore, according to this configuration, the inflow side flange 30, the flow rate controller 16, and the fluid control valves 17 to 19 are collectively mounted on the upper surface 20 a side (according to this configuration, all the flow rate controllers 16 and the fluid control valves 17 to 19 can be accessed from the upper surface 20a side during maintenance (tightening or loosening operation of the mounting bolt 41, etc.), so that the maintainability is extremely good). The gas supply unit 10A or the like or the gas supply device 10 can be realized with as small a width as possible without impairing good maintainability.

  In particular, an increase in the size of the flow path block 20 becomes a big problem when a plurality of gas supply units 10A and the like are integrated due to an increase in the types of process gases. That is, the increase in the size of the flow path block 20 leads to an increase in weight and installation area in the gas supply device 10. Then, in the enlarged flow path block 20 and the gas supply apparatus 10, the freedom degree with respect to installation is very narrowed.

  In this respect, the flow path block 20 can be reduced in size by the above-described configuration, so that the degree of freedom with respect to the installation of the gas supply device 10 is increased, and thus a high-performance semiconductor manufacturing process can be realized well. It becomes. Specifically, for example, the gas supply device 10 can be disposed in the immediate vicinity of the process chamber. In this case, the piping length of the process gas supply line 13 is as short as possible. Therefore, the process gas can be supplied with high frequency and high accuracy (high responsiveness and controllability). Further, the throughput is improved by reducing the process gas switching time.

  Further, in the configuration of the present embodiment, each channel block 20 can be assembled, stocked, and carried. In addition, it can flexibly respond to various requirements for the number of sets of gas supply units 10A, etc. by the number of gas supply units 10A etc. attached to the flow path block 20 or the parallel connection of a plurality of flow path blocks 20 It becomes possible to do. Therefore, according to the present embodiment, the ease of handling at the time of manufacturing the gas supply device 10 is improved, and the number of parts is reduced.

<Modification>
Hereinafter, some typical modifications will be exemplified. In the following description of the modified examples, the same reference numerals as those in the above embodiment can be used for portions having the same configurations and functions as those described in the above embodiment. And about description of this part, the description in the above-mentioned embodiment shall be used suitably in the range which is not technically consistent. Needless to say, the modifications are not limited to those listed below. In addition, all and some of the plurality of modified examples may be applied in a composite manner as appropriate within a technically consistent range.

  The “upper surface 20a” is a name given for convenience in describing each embodiment, and this is not necessarily the upper surface in the vertical direction. That is, depending on the installation mode of the gas supply device 10, the upper surface 20 a can be set so that the normal line thereof faces downward in the horizontal direction or the vertical direction.

  Although the fluid control valve 17 and the fluid control valve 18 are previously attached to the common valve mounting block 40, the present invention is not limited to such an embodiment. That is, the fluid control valve 17 and the fluid control valve 18 can be detachably attached to the flow path block 20 independently of the fluid control valve 19.

  The number of fluid control valves 17 and the like included in one gas supply unit 10A and the like is not limited to the above-described embodiment. In addition, the fluid control valve 17 and the like may be integrated with the flow path block 20 in advance without using the female screw portion or the bolt.

  A part of the fluid control valve 17 or the like may be attached in advance to the flow path block 20 and the remaining part may be detachable from the flow path block 20. The fluid control valve 17 or the like may be an “air operated valve” as described above, or may be an electromagnetic valve or a piezoelectric valve.

  The number of gas supply units 10A and the like that can be mounted in parallel in one flow path block 20 is not limited to four. That is, for example, a flow path block 20 capable of mounting two gas supply units 10A or the like in parallel or a flow path block 20 capable of mounting three gas supply units 10A or the like in parallel may be prepared. Moreover, the parallel number of the flow path blocks 20 is not limited to two. That is, the connection of the three or more flow path blocks 20 is performed in the same manner as in the description of the above-described embodiments.

  FIGS. 8-10 shows the structure of the modification of the flow-path block 20 of this invention. Referring to FIGS. 8 to 10, in this modification, the flow path block 20 is formed with first connection pieces 201 and 201 ′ and second connection pieces 202 and 202 ′. In this modification, the first connection pieces 201 and 201 ′ and the second connection pieces 202 and 202 ′ are formed to have the same thickness as the main body portion of the flow path block 20 described above. The first connection opening 211a, the first connection opening 211b, the second connection opening 221a, and the second connection opening 221b are all provided so as to open at the upper surface 20a.

  The first connection piece 201 is provided so as to protrude in the width direction corresponding to the first connection opening 211a. The first connection piece 201 ′ is provided so as to protrude in the width direction corresponding to the first connection opening 211 b. The second connection piece 202 is provided so as to protrude in the width direction corresponding to the second connection opening 221a. The second connection piece 202 'is provided so as to protrude in the width direction corresponding to the second connection opening 221b.

  The first connection pieces 201 and 201 'and the second connection pieces 202 and 202' are formed so that the protruding amounts are equal. That is, with the two flow path blocks 20 arranged adjacent to each other in the width direction, the first connection piece 201, the second connection piece 202, the first connection piece 201 ′, and the second connection piece 202 ′ are arranged in this order. The first connection opening 211a, the second connection opening 221a, the first connection opening 211b, and the second connection opening 221b are arranged in this order at the same time. The first connection pieces 201 and 201 ′ and the second connection pieces 202 and 202 ′ are formed so as to be arranged in a substantially straight line in the device arrangement direction.

  As shown in FIG. 10, the first connection opening 211 a is connected to the end on the first connection piece 201 side in the width direction of the internal purge gas line 25 via the first connection path 212. That is, the internal purge gas line 25 is formed as a non-through hole in the width direction. In this modification, the first connection path 212 is a substantially cylindrical shape formed from the first connection opening 211a toward the lower surface 20b, similarly to the straight pipe portion 213 in the first embodiment. It is a gas passage having a shape, and is connected to the end portion on the first connecting piece 201 side in the width direction of the internal purge gas line 25.

  The second connection opening 221 a is connected to a position near the end on the second connection piece 202 side in the width direction of the internal purge gas line 25 via the second connection path 222. The second connection path 222 is a gas passage formed in the flow path block 20 so as to connect the end of the internal purge gas line 25 on the second connection piece 202 side and the second connection opening 221a. is there. Specifically, the second connection path 222 is a substantially cylindrical gas path, and is formed from the second connection opening 221a toward the internal purge gas line 25 (that is, toward the lower surface 20b). Yes.

  Similar to the connection bolt screw hole 217 (see FIG. 5) in the first embodiment described above, connection bolt screw holes 230 are provided on both sides of the first connection opening 211, respectively. In this modification, connecting bolt screwing holes 230 are also provided on both sides of the second connection opening 221a. Then, by attaching the bypass pipe 290 in a state where the first connection piece 201, the second connection piece 202, the first connection piece 201 ′ and the second connection piece 202 ′ are adjacently arranged in the device arrangement direction as described above. The flow path block 20 is configured so that the internal purge gas lines 25 and the supply-side internal gas lines 27 in the adjacent flow path blocks 20 are connected to each other.

  Specifically, the bypass pipe 290 includes a flange part 291 and a connecting pipe part 292. The flange portion 291 is configured in the same manner as the flange portion 31 (see FIG. 2 and the like) in the inflow side flange 30 described above. And this flange part 291 is a flow path by screwing the connection bolt B in the connection bolt screwing hole 230 in the state arrange | positioned so that the 1st connection opening part 211 and the 2nd connection opening part 221 may be opposed. The block 20 is hermetically joined. The connecting pipe part 292 is formed in an inverted U shape in front view so as to connect the two flange parts 291 together.

  In the configuration of the modified example, the first connection piece 201 and the second connection piece 202 are bypassed so as to straddle the first connection piece 201 and the second connection piece 202 in a state where the first connection piece 201 and the second connection piece 202 are adjacently arranged in the device arrangement direction. A pipe 290 is attached. As a result, the internal purge gas lines 25 in the adjacently disposed flow path blocks 20 are connected to each other. Similarly, in the state where the first connection piece 201 ′ and the second connection piece 202 ′ are arranged adjacent to each other in the device arrangement direction, the bypass pipe extends across the first connection piece 201 ′ and the second connection piece 202 ′. 290 is mounted. Thereby, the mutual supply side internal gas lines 27 in the adjacently arranged flow path blocks 20 are connected to each other.

  Here, as shown in FIG. 8, in a state where the two flow path blocks 20 are adjacently arranged, the second connection piece is formed in the space between the first connection piece 201 and the first connection piece 201 ′. 202 is accommodated. Similarly, the first connection piece 201 ′ is accommodated in the space between the second connection piece 202 and the second connection piece 202 ′. Therefore, according to such a configuration, when a large number of gas supply units 10A and the like are provided in parallel with an increase in the type of process gas, the size in the width direction of the entire gas supply device 10 is suppressed as much as possible. Is possible.

  The first connection pieces 201 and 201 ′ and the second connection pieces 202 and 202 ′ are formed in a tongue shape (cantilever shape) only in the vicinity of the first connection opening 211 and the second connection opening 221. May be. In particular, in the present embodiment, the first connection piece 201 corresponding to the first connection opening 211a has the minimum necessary dimension in the device arrangement direction, like the first connection piece 201 ′ corresponding to the first connection opening 211b. It may be formed in a limited range (specifically, as narrow as possible in a range in which the connecting bolt screwing holes 230 can be satisfactorily formed on both sides of the first connection opening 211a). The same applies to the second connection piece 202 corresponding to the second connection opening 221a.

<Modified example of schematic configuration of fluid supply control device>
Next, a configuration according to another example (another embodiment) of the present invention will be described. In the following description of another example, the same reference numerals as those in the above embodiment can be used for portions having the same configuration and functions as those described in the above embodiment. And about description of this part, within the range which is not technically contradictory, drawing and description in the above-mentioned embodiment shall be used suitably.

  Referring to FIGS. 11 to 14, in the present embodiment, the flow controller 16 is detachably mounted on the upper surface 20 a side of the flow path block 20. On the other hand, the fluid control valves 17 to 19 and the inflow side flange 30 are detachably mounted on the lower surface 20b side opposite to the upper surface 20a. Further, the fluid control valve 18, the fluid control valve 17, the inflow side flange 30, and the fluid control valve 19 are arranged in this order in the device arrangement direction (direction parallel to the connection path 21e in the connection flow path 21). Due to these, the flow path configuration inside the flow path block 20 is changed from that of the above-described embodiment.

  Except for the above, the flow rate controller 16, the fluid control valves 17 to 19, and the inflow side flange 30 are mounted on the flow path block 20 in the same manner as in the above embodiment. That is, the configurations of the valve mounting block 40, the MFC mounting portion 50, and the valve mounting block 60 are substantially the same as in the above-described embodiment.

  The configuration of the flow path block 20 in the present embodiment will be described. Unlike the above-described embodiment, the connection flow path 21 is provided such that the inlet port 21a and the outlet port 21b are opened on the lower surface 20b side. Yes. Further, the connection flow path 21 is provided between the connection flow path 22 and the connection flow path 23 in the device arrangement direction. Specifically, the inlet port 21a in the connection flow path 21 is provided at a substantially central portion of the flow path block 20 in the device arrangement direction. Other than that, the connection flow path 21 is formed in the substantially U shape similarly to the above-mentioned embodiment.

  The inlet port 22a in the connection flow path 22 is provided so as to open to the lower surface 20b side on the extension line of the directed line drawn from the inlet port 21a to the outlet port 21b in the connection flow path 21. Yes. On the other hand, the outlet port 22b is provided so as to open to the upper surface 20a side. The connection channel 22 is formed so as to connect the inlet port 22a and the outlet port 22b in a straight line. Specifically, in the present embodiment, the outlet port 22b is disposed at a position that substantially matches the inlet port 22a in plan view. That is, the connection flow path 22 is provided in parallel with the thickness direction of the flow path block 20.

  The outlet port 23b in the connection channel 23 is provided so as to open to the lower surface 20b side on the extension line of the directed line drawn from the outlet port 21b in the connection channel 21 toward the inlet port 21a. Yes. On the other hand, the inlet port 23a is provided so as to open to the upper surface 20a side. The connection channel 23 is formed so as to connect the inlet port 23a and the outlet port 23b in a straight line. Specifically, in the present embodiment, the outlet port 23b is disposed at a position that substantially coincides with the inlet port 23a in plan view. That is, the connection flow path 23 is provided in parallel with the thickness direction of the flow path block 20.

  The purge gas supply port 24 is provided so as to open to the lower surface 20 b side on the extension line of the directed line drawn from the outlet port 21 b in the connection channel 21 toward the inlet port 22 a in the connection channel 22. ing. Specifically, the purge gas supply port 24 is disposed in the vicinity of one end of the flow path block 20 in the device arrangement direction. The purge gas supply port 24 is connected to the internal purge gas line 25 in the same manner as in the above embodiment.

  Further, the process gas supply port 26 opens on the lower surface 20b side on the extension line of the directed line drawn from the inlet port 21a in the connection channel 21 toward the outlet port 23b in the connection channel 23. Is provided. Specifically, the process gas supply port 26 is disposed in the vicinity of the other end of the flow path block 20 in the device arrangement direction so as to be close (adjacent) to the outlet port 23 b in the connection flow path 23. The process gas supply port 26 is connected to the supply-side internal gas line 27 in the same manner as in the above embodiment.

  In this embodiment, the purge gas supply port 24, the connection channel 22, the outlet port 21b in the connection channel 21, the inlet port 21a, the connection channel 23, and the process gas supply port 26 are arranged in this order. They are arranged in a substantially straight line along the direction.

  Also in this embodiment, the connection flow paths 21 to 23 are formed so as to bypass the female screw portions 28a to 28d. Specifically, the pair of female screw portions 28c are non-penetrating screw holes opened on the upper surface 20a of the flow path block 20, and are provided outside the connection flow paths 21 to 23 in the device arrangement direction. ing. Further, one of the pair of female screw portions 28 c that is disposed on the connection flow path 22 side is provided so as not to communicate with the internal purge gas line 25. Similarly, the other of the pair of female screw portions 28c and disposed on the connection flow path 23 side is provided so as not to communicate with the supply-side internal gas line 27.

  The female screw portions 28 a, 28 b and 28 d are non-penetrating screw holes and are formed so as to open on the lower surface 20 b of the flow path block 20. One of the pair of female screw portions 28a and one of the pair of female screw portions 28b are provided so as not to communicate with the connection path 21e at a position between the inlet port 21a and the outlet port 21b in the connection flow path 21. ing. The other of the pair of female screw portions 28a and the other of the pair of female screw portions 28d are provided in a region where the internal flow path is not formed between the inlet port 21a and the connection flow path 23 in the connection flow path 21. ing. The other of the pair of female screw portions 28b and the other of the pair of female screw portions 28d are provided in regions where no internal flow path is formed at both ends in the device arrangement direction.

  Thus, in the configuration of the present embodiment, the flow rate controller 16 is detachably mounted on the upper surface 20a side, which is one surface of the flow path block 20. On the other hand, the fluid control valves 17 to 19 are detachably provided on the lower surface 20b side opposite to the upper surface 20a. Therefore, according to such a configuration, the gas supply unit 10A or the like or the gas supply device 10 having good maintainability of the flow rate controller 16 and the fluid control valves 17 to 19 has a smallest possible width and a long length in the device arrangement direction. This will be possible.

  12 and 14, in the embodiment, the process gas supplied to the inlet port 21a in the connection channel 21 flows from the right to the left in the connection channel 21 and the valve mounting block 40 in the drawing. On the other hand, the air flows through the flow rate controller 16 and the valve mounting block 60 from the left to the right in the figure. For this reason, in the embodiment, the “gas flow direction” is not a single direction but is a mode in which the gas reciprocates along the device arrangement direction (or draws a “loop”).

<Modified example of schematic configuration of fluid supply control device>
15 to 18, the configuration of the embodiment is a modification of the above-described embodiment. Specifically, in the present embodiment, the inflow side flange 30 is attached to the end surface 20 c of the flow path block 20. Here, the end surface 20c is one surface in the flow path block 20, and is a surface orthogonal to the upper surface 20a and the lower surface 20b. The end surface 20c is provided on one end side of the flow path block 20 in the device arrangement direction.

  Further, due to this, in this embodiment, the positional relationship between the fluid control valve 17 and the fluid control valve 18 in the device arrangement direction is opposite to that of the above-described embodiment. That is, the fluid control valve 17 is disposed at a position closer to the end surface 20 c than the fluid control valve 18. Further, due to the above-described change, the flow path configuration inside the flow path block 20 is changed from that of the above-described embodiment.

  The inlet port 21a in the connection channel 21 is provided so as to open at the end face 20c. On the other hand, the outlet port 21b is provided so as to open at a position on the end surface 20c side of the lower surface 20b in the device arrangement direction (specifically, a position closer to the one end in the device arrangement direction). ing. As shown in FIGS. 16 and 18, the connection flow path 21 is formed in a shape (substantially L-shaped) bent at a right angle so as to connect the inlet port 21a and the outlet port 21b. Yes.

  The purge gas supply port 24 is provided so as to open at a position near the center of the lower surface 20b in the device arrangement direction. The purge gas supply port 24 is connected to the internal purge gas line 25 in the same manner as in the first and the above embodiments.

  The inlet port 22 a in the connection channel 22 is provided so as to open at the lower surface 20 b at a position between the outlet port 21 b in the connection channel 21 and the purge gas supply port 24. On the other hand, the outlet port 22b is provided so as to open at a position closer to the end surface 20c than the central portion of the upper surface 20a in the device arrangement direction. Specifically, the outlet port 22b is disposed at a position substantially coincident with the outlet port 21b in the connection flow path 21 in plan view. The connection channel 22 is formed so as to connect the inlet port 22a and the outlet port 22b in a straight line. More specifically, in the present embodiment, the connection flow path 22 is provided obliquely in front view so as to intersect the thickness direction of the flow path block 20.

  The connection channel 23 is provided at a position near the other end of the channel block 20 in the device arrangement direction, as in the above-described embodiment. That is, the inlet port 23a in the connection flow path 23 is provided so as to open to the upper surface 20a side at a position near the end opposite to the end face 20c in the device arrangement direction. On the other hand, the outlet port 23b is on the lower surface 20b side on the extension line of the directional line drawn from the outlet port 21b in the connection channel 21 toward the inlet port 22a and the purge gas supply port 24 in the connection channel 22. It is provided so as to open. Specifically, the outlet port 23b is provided so as to open to the lower surface 20b side at a position substantially coincident with the inlet port 23a in plan view, as in the above-described embodiment. The connection channel 23 is formed so as to connect the inlet port 23a and the outlet port 23b in a straight line.

  The process gas supply port 26 is provided at a position between the purge gas supply port 24 and the outlet port 23b in the connection flow path 23 so as to open to the lower surface 20b side. Specifically, the process gas supply port 26 is disposed so as to be close to (adjacent to) the outlet port 23 b in the connection flow path 23. The process gas supply port 26 is connected to the supply-side internal gas line 27 in the same manner as in the above embodiment.

  The pair of female screw portions 28a are formed as non-through holes that open on the end face 20c side so as not to communicate with the connection flow paths 21 and 22. The female screw portions 28 b and 28 d are non-penetrating screw holes and are formed so as to open on the lower surface 20 b of the flow path block 20.

  One of the pair of female screw portions 28 b is formed so as not to communicate with the connection channel 21 on the end face 20 c side with respect to the outlet port 21 b in the connection channel 21. The other of the pair of female screw portions 28b and the other of the pair of female screw portions 28d are arranged between the purge gas supply port 24 and the internal purge gas line 25, the process gas supply port 26, and the supply-side internal gas line 27. It is provided in a region where no flow path is formed.

  The pair of female screw portions 28c are non-penetrating screw holes opened on the upper surface 20a of the flow path block 20, and the outlet port 22b in the connection flow path 22 and the inlet port in the connection flow path 23 in the device arrangement direction. 23a is provided outside. Specifically, one of the pair of female screw portions 28 c is formed so as not to communicate with the connection channel 21 on the end face 20 c side of the outlet port 22 b in the connection channel 22. The other of the pair of female screw portions 28c is provided in a region where the internal flow path is not formed at the end opposite to the end surface 20c in the device arrangement direction, like the other of the pair of female screw portions 28d. Yes.

  Thus, in the embodiment, on the upper surface 20a side in the flow path block 20, the pair of female screw portions 28c, the outlet port 22b in the connection flow path 22, and the inlet port 23a in the connection flow path 23 are: They are arranged in a substantially straight line along the device arrangement direction. Further, on the lower surface 20b side of the flow path block 20, female screw portions 28b and 28d, an outlet port 21b in the connection flow path 21, an inlet port 22a in the connection flow path 22, a purge gas supply port 24, and a process The gas supply port 26 and the outlet port 23b in the connection flow path 23 are arranged in a substantially straight line along the device arrangement direction.

  That is, also in this embodiment, the connection flow paths 21 to 23 and the female screw portions 28a to 28d are arranged in a substantially straight line along the device arrangement direction. And the connection flow paths 21-23 are provided so that the female screw parts 28a-28d may be detoured.

  According to the configuration of the present embodiment, by providing the inflow side flange 30 on the end face 20c of the flow path block 20, the dimension of the flow path block 20 in the device arrangement direction is larger than that of the configuration of the above-described embodiment. It is downsized.

  Further, as shown in FIG. 19, the fluid control valve 17 and the like may be mounted on an end surface (a surface different from the upper surface 20a and the lower surface 20b) in the flow path block 20.

  When the gas supply device 10 is provided with a plurality of gas supply units 10A, 10B,..., The present invention provides a single flow path block 20 having a plurality of gas supply units 10A, 10B,. .. not limited to a common (integral) configuration. That is, the flow path block 20 may be configured to be dividable corresponding to each of the plurality of gas supply units 10A, 10B.

  Further, the number of fluid control valves 17 and the like included in one gas supply unit 10A and the like is not limited to the above-described embodiment. In addition, the fluid control valve 17 and the like may be integrated with the flow path block 20 in advance without using the female screw portion or the bolt.

  20 to 22 show configurations corresponding to these modified examples. 20 to 22, the gas supply units 10A, 10B,... Are configured separately from each other and can be connected to each other in the width direction. In FIG. 20, only two gas supply units 10A and 10B are shown for simplification of illustration, but in this modification, an arbitrary number of gas supply units 10A and the like can be connected. Is possible.

  In each gas supply unit 10 </ b> A and the like of this modification, the flow rate controller 16 is detachably attached to the upper surface 20 a of the flow path block 20 as in the above-described embodiments. On the other hand, the fluid control valve 17 and the like are integrated with the flow path block 20 in advance without using the mounting bolt as described above. That is, the fluid control valve actuator 17 a and the like are directly fixed to the flow path block 20. In this modification, the fluid control valve 17 and the like are provided on the lower surface 20b side of the flow path block 20 (however, in FIG. 20, the lower surface 20b side is the upper side in the figure). It is shown.)

  Here, in the plurality of gas supply units 10 </ b> A, 10 </ b> B,... Provided in parallel, the connection between adjacent units is a side surface (surface having a normal line parallel to the width direction) in the adjacent flow path block 20. It is formed via a connecting surface 20d. Hereinafter, the detail of the structure for connecting the adjacent flow path blocks 20 is demonstrated. In addition, the structure for connecting the above-mentioned connection bodies is mentioned later.

  In the gas supply device 10 of this modification, two types of flow path blocks 20, that is, a first flow path block 201A and a second flow path block 202A are provided. In the connected body of the plurality of gas supply units 10A, 10B,... Provided in parallel, the first flow path block 201A and the second flow path block 202A are alternately arranged. That is, for example, the first flow path block 201A is provided in the gas supply unit 10A, while the second flow path block 202A is provided in the gas supply unit 10B.

  In the first flow path block 201A and the second flow path block 202A, the purge gas supply port 24 and the process gas supply port 26 are provided so as to open at each of the pair of connecting surfaces 20d. The first flow path block 201A and the second flow path block 202A are provided with a connection screw hole 211H and a connection bolt insertion hole 212H. The connecting screw hole 211H is a screw hole penetrating along the width direction, and is formed so that the connecting bolt B can be screwed thereon. The connecting bolt insertion hole 212H is a through hole provided with a step portion that can accommodate the head of the connecting bolt B, and is formed so that the male screw portion of the connecting bolt B can be inserted.

  In this modification, a pair of connecting screw holes 211H are provided at diagonal positions with the purge gas supply port 24 interposed therebetween. In addition, a pair of connecting bolt insertion holes 212 </ b> H are provided at diagonal positions sandwiching the purge gas supply port 24. The pair of connecting screw holes 211H and the pair of connecting bolt insertion holes 212H are arranged in a substantially rectangular shape when viewed from the front (that is, when viewed in parallel with the width direction). Similarly, a pair of connection screw holes 211H and a pair of connection bolt insertion holes 212H are also disposed around the process gas supply port 26 in a substantially rectangular shape when viewed from the front.

  In this modification, the second flow path block 202A has the same configuration as the first flow path block 201A except that the positional relationship between the connection screw hole 211H and the connection bolt insertion hole 212H is different from the first flow path block 201A. ing. Specifically, in a front view, the position where the connection screw hole 211H in the first flow path block 201A is provided matches the position where the connection bolt insertion hole 212H is provided in the second flow path block 202A. At the same time, the first flow path block 201A is arranged so that the position where the connection bolt insertion hole 212H is provided in the first flow path block 201A and the position where the connection screw hole 211H is provided in the second flow path block 202A coincide. The second flow path block 202A is formed. Therefore, hereinafter, detailed configurations of the first flow path block 201A and the second flow path block 202A will be described with reference to FIGS. 21 and 22 which are perspective views of the first flow path block 201A.

  Around the purge gas supply port 24 on the connection surface 20d of the first flow path block 201A (second flow path block 202A) and inside the connection screw hole 211H and the connection bolt insertion hole 212H (on the purge gas supply port 24 side). Is provided with a purge line seal step 213A. The purge line seal step 213A is formed so that a seal member (not shown) for hermetically connecting to the adjacent second flow path block 202A (first flow path block 201A) at the position of the purge gas supply port 24 can be mounted. ing.

  Similarly, around the process gas supply port 26 on the connection surface 20d of the first flow path block 201A (second flow path block 202A) and inside the connection screw hole 211H and the connection bolt insertion hole 212H (process gas supply). On the port 26 side, a supply line seal step 214A is provided. The supply line seal step 214A is formed so that a seal member (not shown) for hermetically connecting to the adjacent second flow path block 202A (first flow path block 201A) at the position of the process gas supply port 26 can be mounted. Has been.

  The first flow path block 201A and the second flow path block 202A are provided with actuator mounting holes 215A, 216A, and 217A, which are substantially cylindrical non-through holes that open on the lower surface 20b. In this modification, the actuator mounting holes 215A, 216A, and 217A are arranged in this order in a substantially straight line along the device arrangement direction. That is, the actuator mounting hole 215A is provided at a position near one end (left side in FIG. 21) of the first flow path block 201A and the second flow path block 202A in the device arrangement direction. On the other hand, the actuator mounting hole 217A is provided at a position near the other end (right side in FIG. 21) of the first flow path block 201A and the second flow path block 202A in the device arrangement direction.

  The actuator mounting holes 215A, 216A and 217A are formed so that the fluid control valve actuators 18a, 17a and 19a can be fixed, respectively. The actuator mounting holes 215A, 216A and 217A are provided so that the end portions in the depth direction form valve chambers in the fluid control valves 18, 17 and 19 after the fluid control valve actuators 18a, 17a and 19a are mounted. ing.

  Hereinafter, the internal flow path configuration in the first flow path block 201A and the second flow path block 202A will be described. In the present embodiment, the inlet port 23a in the connection flow path 23 overlaps with the actuator mounting hole 217A in plan view so as to open at the upper surface 20a (more specifically, with the central axis of the actuator mounting hole 217A) (Coaxial position). The outlet port 23b in the connection flow path 23 is provided so as to open at a substantially central portion in plan view of the actuator mounting hole 217A. And the connection flow path 23 is formed as a substantially cylindrical through-hole which goes to the exit port 23b from the entrance port 23a. That is, the connection flow path 23 is formed so that the gas flowing in from the inlet port 23a through the flow rate controller 16 is discharged to the process gas supply port 26 through the actuator mounting hole 217A (fluid control valve 19). .

  The first flow path block 201A and the second flow path block 202A are provided with a connection flow path 223 for connecting the inflow side flange 30 and the fluid control valve 17 (actuator mounting hole 216A). The connection channel 223 includes an inlet port 223a, an outlet port 223b, a first inlet passage 223c, a second inlet passage 223d, and a connection passage 223e.

  The inlet port 223a is provided at an intermediate position between the pair of female screw portions 28a for detachably mounting the inflow side flange 30 so as to open on the lower surface 20b side. The outlet port 223b is provided so as to open at the actuator mounting hole 216A. The first inlet passage 223c is a substantially cylindrical non-through hole and is provided so as to extend from the inlet port 223a toward the upper surface 20a. The second inlet passage 223d is provided so as to extend along the width direction from the end of the first inlet passage 223c opposite to the inlet port 223a.

  The connection path 223e is welded to a groove formed from the connecting surface 20d side of the extension destination of the second inlet passage 223d by a lid (not shown) having a flat plate shape (oval shape in plan view) formed of stainless steel (for example, This is a space formed by hermetically closing by laser welding, electron beam welding, or the like, and is provided in parallel with the gas flow direction. One end of the connection path 223e is connected to the second inlet path 223d. The other end of the connection path 223e is connected to the outlet port 223b.

  The first flow path block 201A and the second flow path block 202A are provided with a connection flow path 222A for connecting the fluid control valves 17 and 18 (actuator mounting holes 216A and 215A) and the flow rate controller 16. . In the present embodiment, the connection channel 222A includes an inlet port 222a, an outlet port 222b, a first inlet channel 222c, a second inlet channel 222d, a connection channel 222e, an outlet channel 222g, and a junction channel 222h. ,have.

  The inlet port 222a is provided so as to open at a substantially central portion in plan view of the actuator mounting hole 216A. The outlet port 222b is provided at a position overlapping the actuator mounting hole 215A in plan view (more specifically, a position coaxial with the central axis of the actuator mounting hole 215A) so as to open at the upper surface 20a. It should be noted that one of the pair of female screw portions 28c is provided outside the outlet port 222b in the device arrangement direction so as to open on the upper surface 20a side. The other of the pair of female screw portions 28c is provided on the outer side in the device arrangement direction with respect to the inlet port 23a in the connection flow path 23 so as to open on the upper surface 20a side.

  The first inlet passage 222c is a substantially cylindrical non-through hole and is provided so as to extend from the inlet port 222a toward the upper surface 20a. The second inlet passage 222d is provided so as to extend along the width direction from the end of the first inlet passage 222c opposite to the inlet port 222a.

  The connection path 222e is welded to a groove formed from the connecting surface 20d side of the extension destination of the second inlet passage 222d by a flat plate (made oval in plan view) formed of stainless steel (not shown) (for example, This is a space formed by hermetically closing by laser welding, electron beam welding, or the like, and is provided in parallel with the gas flow direction. One end of the connection path 222e is connected to the second inlet path 222d. The other end of the connection path 222e is connected to the outlet path 222g.

  The outlet passage 222g is provided so as to extend from the other end portion of the connection path 222e toward the side opposite to the second inlet passage 222d along the width direction. The outlet passage 222g is connected to the merging passage 222h. The junction passage 222h is a substantially cylindrical through hole, and is provided so as to connect the substantially center portion of the actuator mounting hole 215A in plan view and the outlet port 222b.

  In the present modification, the connection flow path 222A allows the process gas that has flowed into the actuator mounting hole 216A (fluid control valve 17) via the outlet port 223b in the connection flow path 223 from the inlet port 222a to the first inlet passage 222c. The exhaust gas is discharged from the outlet port 222b through the second inlet passage 222d, the connection passage 222e, the outlet passage 222g, and the merging passage 222h, so that the process gas can be supplied to the flow rate controller 16. Further, the connection flow path 222A discharges the purge gas flowing in from the purge gas supply port 24 from the outlet port 222b through the actuator mounting hole 215A (fluid control valve 18) and the junction passage 222h, thereby allowing the purge gas to flow. 16 can be supplied.

  In this modification, the purge gas supply port 24 provided on one of the pair of connection surfaces 20d, the actuator mounting hole 215A (fluid control valve 18), and the other of the pair of connection surfaces 20d are provided. A purge gas flow path that connects the purge gas supply port 24 is formed to correspond to the internal purge gas line in the above-described embodiment. Similarly, the process gas supply port 26 provided on one of the pair of connecting surfaces 20d, the actuator mounting hole 217A (fluid control valve 19), and the process gas provided on the other of the pair of connecting surfaces 20d. By the process gas supply flow path connecting to the supply port 26, the one corresponding to the supply side internal gas line in the above-described embodiment is formed.

  In this modification, the female screw portions 28a and 28c, the connection channel 23, the inlet port 223a and the first inlet passage 223c in the connection channel 223, the inlet port 222a and the outlet port 223b in the connection channel 222A. The first inlet passage 222c and the connection path 223e are arranged in a substantially straight line along the gas flow direction in a plan view. The connection channels 223 and 222A are provided so as not to communicate with the female screw portions 28a and 28c.

  As described above, in the connection body of the plurality of gas supply units 10A, 10B,... Provided in parallel, the adjacent first flow path block 201A and second flow path block 202A are connected to the connection bolt B and the above-mentioned not shown. By joining using the seal member, the opposing purge gas supply ports 24 and the opposing process gas supply ports 26 are hermetically connected to each other. Thereby, an internal purge gas line passing through the plurality of purge gas supply ports 24 and the plurality of actuator mounting holes 215A (fluid control valve 18) is formed. Similarly, supply-side internal gas lines that pass through the plurality of process gas supply ports 26 and the plurality of actuator mounting holes 217A (fluid control valve 19) are formed.

  In such a configuration, the flow rate controller 16 is detachably attached to the flow path block 20 integrally provided with the fluid control valve 17 and the like. Therefore, according to such a configuration, the gas supply unit 10A or the like or the gas supply device 10 can be favorably downsized in the height direction in FIG. In addition, the gas supply unit 10A or the like or the gas supply apparatus 10 that is easy to assemble and has good maintainability of the flow rate controller 16 can be realized with as small a width as possible. Further, by providing a plurality of gas supply units 10A, 10B,... In parallel, the gas supply apparatus 10 capable of supplying a plurality of types of process gas can be realized with as small a width as possible.

  Note that a part of the fluid control valve 17 or the like may be attached in advance to the flow path block 20 and the remaining part may be detachable from the flow path block 20.

  According to the configuration described in each of the above embodiments and modifications, as described above, the gas supply device 10 capable of supplying a plurality of types of process gas can be miniaturized as much as possible. In particular, according to the configuration described in each of the above-described embodiments and modifications, a fluid control device such as the fluid control valve 17 (for example, an installation area described later is allowed) whose width of the main body portion is designed to be as small as possible. In a gas supply unit 10A equipped with an air operated valve having a reduced configuration), an attachment structure for detachably attaching the fluid control device to the flow path block 20 or connecting a plurality of fluid control devices to each other Therefore, the increase in the width dimension due to the flow channel structure for suppressing the flow is favorably suppressed.

<Configuration of piping joint and piping connection structure>
The pipe joints 1 and 1A according to one embodiment of the present invention and the pipe connection structure PJ according to one embodiment of the present invention will be described with reference to FIGS. The pipe joint 1 and the pipe joint 1A have substantially the same configuration. Therefore, first, the details of the configuration of the pipe joint 1 will be described with reference to FIGS. 23 to 25. FIG. 31 shows a pipe joint structure 1C according to the prior art as a comparative example.

  The pipe joint 1 includes a main body 2. The main body 2 is formed in a substantially rectangular parallelepiped outer shape having a longitudinal direction parallel to the horizontal direction in FIGS. That is, the pipe joint 1 has six planar surfaces including a joining surface 2a, a top surface 2b, a first end surface 2c, a second end surface 2d, a first side surface 2e, and a second side surface 2f.

  The joint surface 2a (specifically, the bottom surface) is a plane whose normal is the height direction orthogonal to both the longitudinal direction and the width direction (vertical direction in FIG. 23). The joint surface 2a is a flat surface provided so as to be joined to the mounting target of the pipe joint 1, and is formed in a substantially rectangular shape. The top surface 2b is provided in parallel with the bonding surface 2a.

  The first end face 2c and the second end face 2d are end faces of the main body 2 having the longitudinal direction as a normal line, and are provided in parallel to each other. The first side surface 2e and the second side surface 2f are side surfaces of the main body 2 having the width direction as a normal line, and are provided in parallel to each other.

  A first opening 2g and a seal step 2h are formed on the joint surface 2a. That is, the first opening 2g is provided so as to open at the joint surface 2a. In the present embodiment, the first opening 2g is provided at a substantially central portion in the width direction of the bonding surface 2a. The seal step portion 2h is formed so as to accommodate a seal member (not shown) around the first opening 2g. Here, when the pipe joint 1 is attached (joined and fixed) to the attachment target, the seal member refers to a fluid passage formed in the attachment target and a fluid passage formed inside the pipe joint 1 (details) Is a member for airtight or liquid-tight connection. In addition, since the structure of this sealing member is well-known, in this specification, illustration about this structure and the detailed description beyond this are abbreviate | omitted.

  A first bolt insertion hole 2k and a second bolt insertion hole 2m are formed in the main body 2 along the height direction. In the present embodiment, the first bolt insertion hole 2k and the second bolt insertion hole 2m are screws (bolts: bolt B shown in FIG. 29, for example) when the pipe joint 1 is mounted on the mounting target. Is a through-hole that does not have a screw portion, and is provided so as to open at the joint surface 2a and the top surface 2b.

  The first bolt insertion hole 2k corresponding to the “flow-path-side screw insertion hole” of the present invention is provided on the first end surface 2c rather than the first opening 2g. That is, the first bolt insertion hole 2k is provided at a position near the end on the side where the second opening 2p described later is provided in the longitudinal direction of the main body 2. On the other hand, the second bolt insertion hole 2 m is disposed at the end portion on the second end face 2 d side in the longitudinal direction of the main body portion 2. Specifically, the first bolt insertion hole 2k and the second bolt insertion hole 2m are provided at symmetrical positions across the first opening 2g in plan view.

  A second opening 2p is formed in the first end surface 2c. That is, the second opening 2 p is provided so as to open at the end on the first end face 2 c side in the longitudinal direction of the main body 2. In the present embodiment, the second opening 2p is provided at a substantially central portion in the width direction of the main body 2 (that is, substantially the same position as the first opening 2g in the width direction). In the present embodiment, the second opening 2p is covered with the tube portion 3. The tube portion 3 is a substantially cylindrical member provided so as to protrude outward from the first end surface 2c toward the normal direction of the first end surface 2c, and the outer diameter thereof is the width of the main body portion 2 ( It is formed to be slightly smaller than the dimension in the width direction (the same applies hereinafter).

  A fluid passage (typically a gas passage) that connects the first opening 2g and the second opening 2p (pipe portion 3) is formed inside the main body 2. Specifically, a first passage 4 and a second passage 5 are provided inside the main body 2.

  The first passage 4 is provided along the height direction from the first opening 2g. In the present embodiment, the first passage 4 is formed as a non-through hole. The second passage 5 is provided along the longitudinal direction so as to pass through the second opening 2p and to be connected to the first passage 4. Specifically, in the present embodiment, the second passage 5 is long so as to connect the second opening 2p and a position separated from the joint surface 2a rather than the first opening 2g in the first passage 4. It is provided along the direction. That is, the 2nd channel | path 5 is provided so that the edge part on the opposite side to the 1st opening part 2g in the 1st channel | path 4 and the 2nd opening part 2p may be connected.

  The second passage 5 is provided on the first bolt insertion hole 2k side (that is, at a position where it does not interfere with the second bolt insertion hole 2m). In particular, the second passage 5 is formed so as to bypass the first bolt insertion hole 2k. Specifically, in the present embodiment, the second passage 5 has an opening-side passage 6 and an intermediate passage 7.

  The opening-side passage 6 is a non-through hole provided along the longitudinal direction from the second opening 2p, and is formed so as not to reach the first bolt insertion hole 2k. The intermediate passage 7 is formed along the longitudinal direction so as not to communicate with the first bolt insertion hole 2k but to pass the side thereof. That is, the intermediate passage 7 is provided at a position closer to the first side surface 2e in the main body 2 than the first bolt insertion hole 2k in the width direction. Specifically, the intermediate passage 7 is welded (for example, laser welding or electronic) with a flat plate-like (oval shape in plan view) lid portion 7a formed of stainless steel in a groove formed from the first side surface 2e side. This is a space formed by being hermetically or liquid-tightly closed by beam welding or the like, and is provided in parallel to the longitudinal direction.

  The intermediate passage 7 is provided so that one end thereof communicates with the end portion on the top surface 2b side of the first passage 4 via a communication portion 8a which is an extremely short fluid passage. Similarly, the intermediate passage 7 is provided so that the other end thereof communicates with the end portion of the opening side passage 6 on the first bolt insertion hole 2k side via a communication portion 8b which is an extremely short fluid passage. As described above, in the main body 2, the fluid passage extending from the second opening 2p to the first opening 2g is substantially L-shaped along the longitudinal direction while bypassing the first bolt insertion hole 2k. Is formed.

  The pipe joint 1A has a first bolt insertion hole 9a instead of the first bolt insertion hole 2k, and a pipe joint 1 (almost) except that it has a second bolt insertion hole 9b instead of the second bolt insertion hole 2m. ) It has the same configuration. Therefore, in the configuration of the pipe joint 1A shown in FIGS. 26 to 28, the description of the pipe joint 1 described above is used for the explanation of the portions other than the first bolt insertion hole 9a and the second bolt insertion hole 9b. Is done.

  The first bolt insertion hole 9a has a screw portion to which the above-described screw inserted into the first bolt insertion hole 2k can be screwed. In the present embodiment, the first bolt insertion hole 9a is formed as a non-through hole that opens only at the joint surface 2a. Similarly, the second bolt insertion hole 9b has a screw portion to which the above-described screw inserted into the second bolt insertion hole 2m can be screwed. In the present embodiment, the second bolt insertion hole 9b is also formed as a non-through hole that opens only at the joint surface 2a.

  In the pipe joints 1 and 1A, the central axis C1 of the second opening 2p along the longitudinal direction (specifically parallel to the longitudinal direction) is along the height direction (specifically parallel to the height direction). The center axis C2 of the first opening 2g and the substantially central portion in the width direction of the main body 2 are crossed (specifically orthogonal).

  A pipe connection structure PJ shown in FIG. 29 includes a pipe joint 1 and a pipe joint 1A. The pipe part 3 in the pipe joint 1 is connected to a tubular pipe P11 formed of stainless steel in an airtight or liquidtight manner by welding (for example, TIG welding) or the like. Similarly, the pipe portion 3 in the pipe joint 1A is connected to a tube-like pipe P12 formed of stainless steel in an airtight or liquidtight manner by welding (for example, TIG welding) or the like. The pipe joint 1 and the pipe joint 1A are joined to each other at the joint surface 2a so that the first openings 2g overlap each other. And the pipe connection structure PJ joins the joint surface 2a of the pipe joint 1 and the joint surface 2a of the pipe joint 1A as described above, and inserts one bolt B through the first bolt insertion hole 2k. It is formed by screwing into the first bolt insertion hole 9a and screwing into the second bolt insertion hole 9b while inserting another bolt B through the second bolt insertion hole 2m.

  The pipe connection structure PJ shown in FIG. 30 connects the pipe P11 and the pipe P12, connects the pipe P21 and the pipe P22, connects the pipe P31 and the pipe P32, and connects the pipe P41 and the pipe P42. Are connected, four sets of pipe connection structures PJ shown in FIG. 29 are provided.

<Action and effect>
In the configuration of the above-described embodiment, the first passage 4 provided along the height direction between the first bolt insertion hole 2k (9a) and the second bolt insertion hole 2m (9b), and the second A fluid passage between the opening 2p (pipe portion 3) is formed along the longitudinal direction so as to bypass the first bolt insertion hole 2k (9a). The pipe joint 1 having such a configuration is fixed (mounted) to the mounting target by inserting a screw (bolt B or the like) through the first bolt insertion hole 2k and the second bolt insertion hole 2m along the height direction. The

  Here, the first passage 4 and the second passage 5 are made as close as possible in the width direction, and the first bolt insertion hole 2k (9a) and the second passage 5 are not allowed to communicate with each other in the width direction. By making it approach as close as possible, the dimension in the width direction of the main body 2 can be made as small as possible. Therefore, according to such a configuration, it is possible to satisfactorily downsize or integrate the device configuration in the width direction.

  Furthermore, in the pipe joints 1 and 1A, the central axis C1 of the second opening 2p along the longitudinal direction is equal to the central axis C2 of the first opening 2g along the height direction and the width direction of the main body 2. Intersect at a substantially central part (specifically, orthogonal on the same plane). In such a configuration, the center axis C1 in the pipe joint 1 and the center axis C1 in the pipe joint 1A substantially coincide with each other in the width direction. Therefore, according to this configuration, the piping design is facilitated. Specifically, the two pipes P11 and P12 can be connected while being arranged on a substantially straight line in the width direction. In addition, when the pipe joint 1 is mounted on a certain mounting target using a screw, the occurrence of interference between the pipe portion 3 and the pipe connected thereto and the above-described screw and its fastening tool is favorably avoided. Is done.

  In particular, in the pipe connection structure PJ formed by connecting (connecting) the pipe joint 1 and the pipe joint 1A, as shown in FIGS. 29 and 30, the pipe joint 1 and the pipe joint 1A are The fastening (connection) or separation operation can be performed by inserting a rod-shaped hexagon wrench or the like along the height direction from the top surface 2b side of the pipe joint 1 and operating the bolt B. Therefore, according to this configuration, even when the widths of the pipe joint 1 and the pipe joint 1A are made as small as possible, good maintainability (workability of the above-described work) is ensured.

  In addition, as shown in FIG. 30, a plurality of pipes P11, P21,... Provided in parallel and a plurality of pipes P12, P22,. The pipe connection structure PJ for forming the connection can be well integrated in the width direction as compared with the pipe joint structure 1C according to the related art (see FIG. 31).

  That is, “d” shown in FIG. 30 is an interval between adjacent pipes necessary when the bolt B is operated along the height direction from the top surface 2b side of the pipe joint 1 as described above. Indicates. Here, in FIG. 30, since the four pipes P11 to P41 provided in parallel and the four pipes P12 to P42 provided in parallel are connected, between the centers of P11 and P41. The distance (distance between the centers of P12 and P42) D is 3d.

  On the other hand, in the pipe joint structure 1C according to the prior art (see FIG. 31), maintenance work for fastening and separation is performed by inserting a spanner from a direction orthogonal to the pipe P11 etc. and centering on the axial direction of the pipe P11 etc. Is done by rotating. Therefore, when the pipe joint structure 1C according to the prior art is used, the pipes P11 to P41 and the pipes P12 to P42 are adjacent to each other as shown in FIG. The distance d1 between the pipes is much larger than the distance d in FIG. 30, and the center-to-center distance between P11 and P41 (the center-to-center distance between P12 and P42) D1 is also much larger than the center-to-center distance D in FIG. Become.

  Next, with reference to FIGS. 32 to 34, the above-described piping joint 1 (see FIGS. 23 to 25) is applied to the gas supply device 10 as the “fluid supply control device” of the present invention. An example will be described.

  The pair of female screw portions 28 a 1 and 28 a 2 are provided at positions corresponding to the pipe joint 1. Specifically, the pair of female screw portions 28a1 and 28a2 corresponding to the pipe joint 1 are arranged in the device arrangement direction on both sides of the connection channel 21 with the inlet port 21a interposed therebetween. That is, the female screw portion 28a1 (upstream in the gas flow direction) is provided at a position on the most upstream side of the flow path block 20 in the gas flow direction. The pair of female screw portions 28 b are provided at positions corresponding to the fluid control valves 17 and 18. The pair of female screw portions 28 c are provided at positions corresponding to the flow rate controller 16. The pair of female screw portions 28 d are provided at positions corresponding to the fluid control valve 19.

  In the present embodiment, the pair of female screw portions 28a1, 28a2, the pair of female screw portions 28b, the pair of female screw portions 28c, and the pair of female screw portions 28d are arranged in this order in the gas flow direction (equipment). It is provided so that it may be arranged on a substantially straight line along the arrangement direction. Specifically, the female screw portions 28b and 28c and the female screw portion 28d are positioned on a center line C (see a one-dot chain line in FIG. 32) whose center in a plan view is a straight line parallel to the gas flow direction. It is provided to do. Further, the pair of female screw portions 28a1 and 28a2 are provided such that a circle constituting an inner diameter in plan view overlaps the center line C.

  In the present embodiment, the female screw portion 28a1 is provided such that its center is offset to one side in the apparatus width direction (the side opposite to the gas supply units 10B to 10D) with respect to the center line C described above. Yes. Similarly, the female screw portion 28a2 is provided such that its center is offset from the above-mentioned center line C to the other side (gas supply units 10B to 10D side) in the apparatus width direction.

  One pipe joint 1 is provided in each of the gas supply units 10A, 10B, 10C and 10D. The pipe joint 1 in the gas supply unit 10 </ b> A is configured to be connected to an inlet port 21 a (corresponding to “inlet / outlet” of the present invention) in the connection flow path 21. That is, the pipe joint 1 is hermetically joined to the upper surface 20a of the flow path block 20 at a position facing the inlet port 21a, thereby connecting the process gas inflow line 11A and the inlet port 21a. (The piping joint 1 in the gas supply units 10B, 10C, and 10D has the same configuration).

  In the pipe joint 1, the longitudinal direction of the main body portion 2 is a direction along the device arrangement direction (specifically parallel), and the width direction of the main body portion 2 is a direction along the device width direction (specifically parallel). ), And is attached to the flow path block 20 so that the height direction in the main body 2 is a direction (specifically parallel) along the thickness direction of the flow path block 20. Moreover, in the main-body part 2, the 1st volt | bolt penetration hole 2k and the 2nd volt | bolt penetration hole 2m are the states in which the volt | bolt B is the above-mentioned centerline in planar view in the state which mounted | wore with the pipe joint 1 with respect to the flow path block 20. It is formed to cross C. The joint surface 2 a in the main body 2 is joined to the upper surface 20 a in the flow path block 20.

  The pipe joint 1 is attached to the flow path block 20 so that the first end face 2c is located on the upstream side in the gas flow direction. A tube portion 3 for connecting to the process gas inflow line 11 is provided so as to protrude from the first end surface 2c in a substantially horizontal direction.

  The first side surface 2e is provided on the female screw portion 28a2 side in a state where the pipe joint 1 is mounted on the flow path block 20. The second side surface 2f is provided on the female screw portion 28a1 side in a state where the pipe joint 1 is attached to the flow path block 20.

  The pipe joint 1 is attached to and detached from the flow path block 20 by inserting a pair of bolts B through the first bolt insertion hole 2k and the second bolt insertion hole 2m and screwing them into the pair of female screw portions 28a1 and 28a2. It is installed freely. Here, in the present embodiment, the width of the main body 2 is slightly larger than the outer diameters of the tube 3 and the bolt B, and the width (fluid) of the flow rate controller 16 and the fluid control valves 17 to 19. The width of the control valve actuators 17a to 19a is substantially the same.

  The first bolt insertion hole 2k is disposed on the tube part 3 side in plan view so as to correspond to the female screw part 28a1. On the other hand, the 2nd bolt insertion hole 2m is arrange | positioned at the edge part by the side of the 2nd end surface 2d in the above-mentioned longitudinal direction so as to correspond to the internal thread part 28a2. The first opening 2g is arranged at a position facing the inlet port 21a in the connection flow path 21 corresponding to the process gas inlet in the flow path block 20 in a state where the pipe joint 1 is attached to the flow path block 20. Yes.

  The seal step portion 2h is formed so as to be able to accommodate a gas seal member. This gas seal member has an inlet port 21a in the connection channel 21 at the joint between the upper surface 20a in the flow channel block 20 and the joint surface 2a in the main body 2 with the pipe joint 1 mounted on the flow channel block 20. And the first opening 2g are hermetically connected. The second opening 2p is provided so as to open at the upstream end of the main body 2 in the gas flow direction in a state where the pipe joint 1 is attached to the flow path block 20.

  One of the pair of female screw portions 28b corresponding to the fluid control valves 17 and 18 is provided at a position between the outlet port 21b in the connection flow path 21 and the female screw portion 28a2. The other of the pair of female screw portions 28b is provided at a position between the purge gas supply port 24 and the outlet port 22b of the connection flow path 22 (more strictly speaking, the other of the pair of female screw portions 28b). Is provided between the purge gas supply port 24, one of the pair of female screw portions 28c, which will be described later, and the purge gas supply port 24. However, at this stage of explanation, the position of the pair of female screw portions 28c is Therefore, for the positions of the pair of female screw portions 28c, see the description below.)

  One of the pair of female screw portions 28 c corresponding to the flow rate controller 16 is between the downstream one of the pair of female screw portions 28 b in the gas flow direction and the outlet port 22 b in the connection flow path 22. In the position. The other of the pair of female screw portions 28c is provided at a position between the inlet port 23a and the outlet port 23b in the connection channel 23 (more strictly speaking, the other of the pair of female screw portions 28c is the inlet However, at this stage of description, the positions of the pair of female screw portions 28d have not yet been determined, so that the pair of female screw portions 28d is provided between the pair of female screw portions 28d. (For the position of the female screw portion 28d, see the description below.)

  Further, a through hole (not shown) for inserting the mounting bolt 51 is formed at a position corresponding to the female screw portion 28 c in the MFC mounting portion 50. The flow rate controller 16 is airtightly attached to the upper surface 20a side of the flow path block 20 by screwing the mounting bolts 51 into the pair of female screw portions 28c. That is, the pair of female screw portions 28 c are provided so that the flow rate controller 16 (MFC attachment portion 50) can be detachably attached to the flow path block 20. Since the configuration in which the flow rate controller 16 (MFC attachment portion 50) is hermetically joined to the upper surface 20a side in the flow path block 20 is well known, in the present specification, such a configuration is illustrated or Further detailed description is omitted.

  As described above, in the present embodiment, the female screw portions 28a1 and 28a2, the connection channel 21 (including the inlet port 21a, the inlet passage 21c, the connection passage 21e, the outlet passage 21d, and the outlet port 21b), the female screw portion. 28b, connection flow path 22 (same as above), purge gas supply port 24, female screw portion 28c, connection flow path 23 (same as above), process gas supply port 26, and female screw part 28d are substantially aligned along the device arrangement direction. Arranged in a shape. The female screw portions 28a1, 28a2, 28b, 28c, and 28d are formed as non-through holes that open on the upper surface 20a. That is, the connection flow paths 21, 22, and 23 are formed so as to bypass the female screw portions 28a1 to 28d in the depth direction of the female screw portions 28a1 to 28d. Specifically, the female screw portions 28a1 to 28d are formed so as not to communicate with the connection flow paths 21 to 23.

<Action and effect>
In the configuration of the present embodiment as described above, the pipe joint 1 is detachably attached to the flow path block 20 by the pair of female screw portions 28a1 and 28a2. Similarly, the fluid control valves 17 and 18 are detachably attached to the flow path block 20 by a pair of female screw portions 28b. The flow rate controller 16 is detachably attached to the flow path block 20 by a pair of female screw portions 28c. Further, the fluid control valve 19 is detachably attached to the flow path block 20 by a pair of female screw portions 28d.

  Then, the pipe joint 1 and the fluid control valves 17 and 18 are connected by the connection flow path 21. Similarly, the fluid control valves 17 and 18 and the flow rate controller 16 are connected by a connection flow path 22. Further, the flow controller 16 and the fluid control valve 19 are connected by a connection flow path 23. And these connection flow paths 21-23 are arrange | positioned on the substantially same straight line as the female screw parts 28a-28d, and are formed so that these may be detoured in the depth direction.

  Therefore, according to the above-described configuration, the width of the pipe joint 1, the valve mounting block 40, the MFC mounting portion 50, and the valve mounting block 60 is minimized (specifically, the flow rate controller 16 and the fluid control valve actuators 17a to 19a). The flow rate controller 16 and the fluid control valves 17 to 19 can be satisfactorily attached to and detached from the flow path block 20 even when set to substantially the same width. In other words, these can be satisfactorily attached to and detached from the flow path block 20 without using four mounting bolts in a substantially rectangular shape in plan view. Therefore, according to such a configuration, the width of each gas supply unit 10A and the like and the entire width of the gas supply device 10 can be made as small as possible. Therefore, the gas supply device 10 has good maintainability. It is possible to further reduce the size while holding.

  In particular, paying attention to the configuration of the piping portion with respect to the flow path block 20, in the pipe joint 1, the main body portion 2 formed in an outer shape having a longitudinal direction in plan view, and the second opening 2 p side in the longitudinal direction, Is provided with a first bolt insertion hole 2k at the opposite end. Further, the first bolt insertion hole 2k and the second bolt insertion hole 2m are provided at substantially symmetrical positions across the first opening 2g and the first passage 4 that open toward the flow path block 20. The pipe joint 1 is attached to the flow path block 20 using the first bolt insertion hole 2k, the second bolt insertion hole 2m, and the bolt B.

  Here, in the main body 2, the first passage 4 is provided along the height direction from the first opening 2g. Further, the second passage 5 is provided so as to bypass the first bolt insertion hole 2k along the longitudinal direction from a position separated from the first opening 2g in the first passage 4.

  That is, in this configuration, a substantially L-shaped gas passage is formed in the main body 2 between the first opening 2g and the second opening 2p in a side sectional view. Further, the first passage 4 and the second passage 5 are made as close as possible in the width direction, and the second bolt insertion hole 2m and the second passage 5 are made as small as possible in the width direction so as not to communicate with each other. By making it approach, the dimension in the width direction of the main-body part 2 can be made as small as possible.

  Moreover, in this structure, the structure of the piping part with respect to the flow path block 20 is miniaturized as much as possible. That is, the pipe joint 1 is arranged along the gas flow direction together with the flow rate controller 16 and the fluid control valves 17 to 19 and the configuration for mounting them on the flow path block 20 (such as the female screw portion 28b and the mounting bolt 41). Are attached to the flow path block 20 by the female screw portions 28a1, 28a2 and the pair of bolts B arranged in a substantially straight line.

  At this time, from the pipe joint 1, the gas passage configuration for connecting to the process gas inflow line 11 (the gas passage inside the main body portion 2 and the pipe portion 3) is substantially horizontally from the main body portion 2 in the gas flow direction. Is provided so as to extend toward the upstream side. For this reason, as shown in FIGS. 32 and 33, the portion in the vicinity of the pipe joint 1 in the process gas inflow line 11 is provided without being bent in the apparatus width direction or the height direction.

  In addition, when the pipe joint 1 is attached to and detached from the flow path block 20, the first bolt insertion hole 2 k and the second bolt insertion hole 2 m are at positions that do not interfere with the vicinity of the pipe joint 1 in the process gas inflow line 11. . For this reason, it is not necessary to create (secure) a relatively large space for fastening the bolt B by piping design above the first bolt insertion hole 2k and the second bolt insertion hole 2m. That is, it is not necessary to detour such a pipe portion in order to secure a space for attaching / detaching the pipe joint 1. Therefore, this piping part can be shortened as much as possible.

  Further, in the configuration of the present embodiment, the pipe joint 1, the flow rate controller 16, and the fluid control valves 17 to 19 are concentrated on the upper surface 20 a side in the flow path block 20. Therefore, according to such a configuration, the piping joint 1, the flow rate controller 16, and the fluid control valves 17 to 19 are collectively mounted on the upper surface 20a side (according to this configuration, all the piping joints 1, Since the flow rate controller 16 and the fluid control valves 17 to 19 can be accessed from the upper surface 20a side during maintenance (such as tightening or loosening the bolt B and the mounting bolt 41), the maintainability is extremely high. The gas supply unit 10A or the like or the gas supply apparatus 10 can be realized with as small a width as possible without impairing good maintainability.

  The configuration shown in FIGS. 29 and 30 is, for example, before reaching the flow path block 20 in the process gas inflow line 11 (process gas inflow lines 11A, 11B, 11C, and 11D) shown in FIG. It can be satisfactorily applied to the pipe connection structure in the pipe portion.

  The fluid control valves 17 to 19 may be detachably mounted on the lower surface 20b side. FIG. 35 corresponds to such a modification. In this modification, the pipe joint 1 has the same configuration as that of the above-described embodiment, and the end face of the flow path block 20 so that the pipe portion 3 protrudes downward (on the lower surface 20b side). It is attached to 201B. Here, the end surface 201B is one surface of the flow path block 20 and is a surface orthogonal to the upper surface 20a and the lower surface 20b. The end surface 201B is provided on one end side of the flow path block 20 in the device arrangement direction.

  Moreover, in this modification, the fluid control valves 17, 18, and 19 are arranged in the device arrangement direction in this order from the end face 201B side. Due to these changes, the flow path configuration inside the flow path block 20 is changed from that of the above-described embodiment. Except for the above, the flow controller 16, the fluid control valves 17 to 19, and the pipe joint 1 are mounted on the flow path block 20 in the same manner as in the above-described embodiment. That is, the configurations of the valve mounting block 40, the MFC mounting portion 50, and the valve mounting block 60 are substantially the same as in the above-described embodiment.

  The inlet port 21a in the connection channel 21 is provided so as to open at a substantially central portion in the thickness direction of the end surface 201B. On the other hand, the outlet port 21b is provided so as to open at a position closer to the end surface 201B than the central portion of the lower surface 20b in the device arrangement direction. And the connection flow path 21 is formed in the shape (substantially L shape) bent at right angle so that the inlet port 21a and the outlet port 21b may be connected.

  The pair of female screw portions 28a1 and 28a2 are formed as non-through holes that open on the end face 201B side so as not to communicate with the connection flow paths 21 and 22. Specifically, the female screw portion 28a1 is provided above the inlet port 21a in the connection channel 21 (on the upper surface 20a side). On the other hand, the female screw portion 28a2 is provided below the inlet port 21a in the connection channel 21 (on the lower surface 20b side). The female screw portion 28a1, the inlet port 21a in the connection channel 21, and the female screw portion 28a2 are arranged in this order from top to bottom.

  The female screw portions 28 b and 28 d are non-penetrating screw holes and are formed so as to open on the lower surface 20 b of the flow path block 20. One of the pair of female screw portions 28b is formed so as not to communicate with the connection channel 21 on the end surface 201B side with respect to the outlet port 21b in the connection channel 21. The other of the pair of female screw portions 28b and the other of the pair of female screw portions 28d are arranged between the purge gas supply port 24 and the internal purge gas line 25, the process gas supply port 26, and the supply-side internal gas line 27. It is provided in a region where no flow path is formed.

  Thus, in this modification, on the upper surface 20a side of the flow path block 20, the pair of female screw portions 28c, the outlet port 22b in the connection flow path 22, and the inlet port 23a in the connection flow path 23 are provided. These are arranged in a substantially straight line along the device arrangement direction. Further, on the lower surface 20b side of the flow path block 20, female screw portions 28b and 28d, an outlet port 21b in the connection flow path 21, an inlet port 22a in the connection flow path 22, a purge gas supply port 24, and a process The gas supply port 26 is arranged in a substantially straight line along the device arrangement direction.

  Moreover, in the structure of this modification, the pipe part 3 in the pipe joint 1 is provided so as to protrude downward (lower surface 20b side). For this reason, the portion in the vicinity of the pipe joint 1 in the process gas inflow line 11 is provided without being bent in the apparatus width direction. Therefore, this piping part can be shortened as much as possible.

  Furthermore, according to the configuration of the present modification, by providing the pipe joint 1 on the end surface 201B of the flow path block 20, the dimension of the flow path block 20 in the device arrangement direction is reduced. Thereby, the flow path block 20 can be further reduced in weight.

  Note that the flow state of the process gas in the present modification will be described with reference to FIG. First, the process gas is supplied to the inlet port 21a in the connection channel 21 provided on the end surface 201B of the channel block 20. Such process gas moves downward in the connection flow channel 21 after moving in the right direction in the figure. Thereafter, the process gas flows through the valve mounting block 40 from the outlet port 21 b in the connection channel 21 to the inlet port 22 a in the connection channel 22 through the fluid control valve 17. The flow of the process gas so far is directed from the left to the right in the figure in the device arrangement direction.

  On the other hand, the outlet port 22b in the connection channel 22 is on the left side in the drawing with respect to the inlet port 22a in the device arrangement direction. For this reason, the flow of the process gas in the connection flow path 22 is directed from the right to the left in the drawing in the device arrangement direction. Thereafter, the process gas flows through the flow rate controller 16 (including the MFC attachment 50) from the left to the right in the drawing in the device arrangement direction.

  Further, the process gas supplied to the inlet port 23a in the connection flow path 23 via the flow rate controller 16 (including the MFC mounting portion 50) flows downward in the connection flow path 23 and flows to the valve mounting block 60. Reach. Also in the valve mounting block 60, the process gas is directed from the right to the left in the drawing in the apparatus arrangement direction while going to the process gas supply port 26 through the fluid control valve 19. As described above, in this modification, the “gas flow direction” is not a single direction in the device arrangement direction, but is a mode of reciprocating along the device arrangement direction (or drawing a “loop”).

  The present invention is not limited to the piping configuration as in the above-described embodiment or modification. For this reason, the configuration of the pipe joint 1 can be appropriately changed according to the piping configuration of the entire apparatus.

  For example, as shown in FIGS. 36 to 38, the first passage 4 can be formed as a through hole extending from the joint surface 2a to the top surface 2b. In this case, the pipe portion 3 can be provided also on the top surface 2b. Furthermore, as shown in FIGS. 39 to 41, the pipe portion 3 and the second opening 2 p can be provided also on the second end face 2 d side. In this case, a pair of the second passages 5 are formed across the first opening 2g (first passage 4) in plan view. Typically, in this case, the pair of second passages 5 can be provided substantially symmetrically with respect to the first opening 2g (first passage 4).

  The pipe part 3 may be omitted as appropriate.

  The first bolt insertion hole 2k and the second bolt insertion hole 2m may not be provided at symmetrical positions across the first opening 2g in plan view. That is, the positions of the first bolt insertion hole 2k and the second bolt insertion hole 2m can be appropriately changed within a range in which the seal at the first opening 2g can be satisfactorily secured.

  The present invention is not limited to application to a fluid supply point to the flow path block 20. That is, the present invention can also be applied to a fluid outflow location (outflow side joint) from the flow path block 20.

  2. Description of the Related Art Conventionally, in an air operated valve that slides two or more pistons by operating air pressure, a compression spring that urges the valve body in a direction to contact the valve seat in order to contact or separate the valve body from the valve seat. It is used. In the semiconductor manufacturing process, since dangerous gas is handled, it is necessary to prevent any gas from leaking from the air operated valve for semiconductor manufacturing. Therefore, high sealing performance is required when the air operated valve is closed. For example, Japanese Patent Laid-Open No. 04-248085 discloses an air operated valve 100 as shown in FIG.

  However, the air operated valve 100V has the following problems.

  That is, the air operated valve 100V includes pistons 101AV, 101BV, and 101CV. Eight coil springs 102AV to 102AV, 102BV to 102BV, and 102CV to 102CV are circumferentially attached to each piston and used. For example, if any one of the eight coil springs deteriorates, the valve body may be out of balance and tilt, and the sealing force required when the air operated valve 100V is closed may be deteriorated.

  In order to solve the above problem, in the air operated valve 200V described in Patent Document 2 (Japanese Patent Laid-Open No. 2008-144819), as shown in FIG. 54, the first piston 201V and the second piston 202V are the first ones. The piston 201V includes two coil springs 203V and 204V on the same plane in order to obtain a sealing force when the valve is closed.

  However, the air operated valve 200V described in Patent Document 2 has the following problems.

  (1) If two coil springs 203V and 204V are attached to the first piston 201V on the same plane as the air operated valve 200V in order to obtain a sealing force necessary for closing the valve, the valve may be enlarged. There is. In recent years, semiconductor manufacturing apparatuses are required to switch various gases as the semiconductor wafer manufacturing process becomes more complicated. Along with this, the number of valves to be installed is increasing. Therefore, when a plurality of air operated valves are installed, there arises a problem that the entire installation area increases. Therefore, there is an increasing demand for downsizing each individual valve.

  (2) Further, if the valve is downsized, the installation area is limited, and the flexibility of the spring wire diameter and spring diameter is lost. The reason is that if the installation area is limited, the wire diameter of the spring must be reduced, and a spring having a small diameter must be used. For this reason, the stress applied to one spring increases, which causes a problem in the durability of the spring. In particular, in the semiconductor manufacturing process, since dangerous gases are handled, securing of the sealing force necessary for closing a fluid control valve for semiconductor manufacturing, valve performance, durability, and the like are major issues.

  The present invention is for solving the above-mentioned problems, and it is possible to improve the degree of freedom in designing a compression spring while reducing the size of the valve and reducing the overall installation area, and to provide a sealing force necessary for closing the valve. It is an object of the present invention to provide a fluid control valve capable of ensuring the above.

<Configuration of fluid control valve>
As shown in FIG. 42, the fluid control valve 1V (the fluid control valves 17 to 19 described above) includes a valve unit YV that controls the fluid and an actuator unit XV that applies driving force to the valve unit YV. The fluid control valve 1V connects the actuator part XV to the body 14V via the adapter 15V. The fluid control valve 1V has a diameter similar to that of a pencil and forms a cylindrical appearance.

  As shown in FIG. 44, the valve portion YV includes a body 14V and a holder 16V. On the lower surface of the body 14V, an inlet channel 14bV into which the control fluid flows and an outlet channel 14cV from which the control fluid flows out are formed. A mounting hole 14dV is formed in a cylindrical shape on the upper surface of the body 14V. A valve seat 14aV is formed at the center of the body 14V, and the inlet channel 14bV and the outlet channel 14cV communicate with each other through a valve hole in the valve seat 14aV.

  A holder 16V is fixed to the upper portion of the body 14V by welding at a welding portion 29V. Thereby, the body 14V and the holder 16V are integrated and sealed. An adapter 15V is attached to the upper portion of the holder 16V as shown in FIG. A male screw portion 16aV is provided on the upper outer peripheral surface of the holder 16V, and a female screw portion 15aV is provided on the inner peripheral surface of the adapter 15V. A cylindrical stem 24V is slidably held on the inner peripheral surface of the holder 16V. An opening is formed on the upper surface of the holder 16V and a compression spring 19V is accommodated. Moreover, the upper end surface of the bellows 17V is attached to the lower surface of the holder 16V. The lower end surface of the bellows 17V is attached to a valve body holding portion 24aV formed on the lower surface of the stem 24V. A valve body 18V made of an elastic body is attached to the valve body holding portion 24aV. That is, the bellows 17V is disposed between the valve body 18V and the holder 16V.

  The valve body 18V is in contact with or separated from the valve seat 14aV. When the valve body 18V comes into contact with the valve seat 14aV, the inlet flow path 14bV and the outlet flow path 14cV are blocked. When the valve body 18V is separated from the valve seat 14aV, the inlet flow path 14bV and the outlet flow path 14cV communicate. A spring mounting plate 28V is attached to the stem 24V, and the upper end surface of the compression spring 19V is in contact with the lower surface side of the spring mounting plate 28V. The lower end surface of the compression spring 19V is in contact with the upper surface of the opening of the holder 16V. The compression spring 19V biases the valve body 18V in a direction in which it is separated from the valve seat 14aV. As shown in FIG. 43, an O-ring 27V for preventing air leakage is attached between the upper outer peripheral portion of the stem 24V and the inner peripheral surface of the interior part 23AV.

  As shown in FIG. 43, the actuator portion XV includes a first piston 11AV and a second piston 11BV in series on the same axis. “Coaxial” means that the axes are the same. Further, one first compression spring 12AV that urges the valve body 18V in a direction to contact the valve seat 14aV is coaxially attached to the first piston 11AV, and the valve body 18V is attached to the second piston 11BV. One second compression spring 12BV that is urged in a direction in contact with the seat 14aV is coaxially attached. Since each is mounted on the same axis in series, the width of the valve can be reduced and the size can be reduced. The first piston 11AV and the second piston 11BV, the first compression spring 12AV and the second compression spring 12BV, and the interior part 23AV and the interior part 23BV have the same shape. Therefore, parts can be shared and manufacturing costs can be reduced. In addition, work efficiency is improved during assembly.

  Furthermore, the actuator portion XV includes an interior part 23AV, an interior part 23BV, an exterior member 22V, and a cap 20V.

  In addition, description of another component is omitted by demonstrating one component among each components of the same shape. Further, since the explanatory text becomes complicated, “A” and “B” of the parts having the same shape are appropriately omitted.

  As shown in FIG. 43, in the actuator portion XV, two interior parts 23AV and 23BV are loaded in a tube-shaped exterior member 22V. The interior component 23V has a cylindrical side surface. A cylinder 23aV is formed in the upper part of the interior part 23V. The outer diameter of the interior component 23V is substantially the same as the inner diameter of the exterior member 22V. An opening smaller than the inner diameter of the exterior member 22V is formed in the lower part of the interior part 23V. A cap 20V is attached to the tip of the exterior member 22V, and an adapter 15V is attached to the other end. Thus, the interior parts 23AV and 23BV are sandwiched and held between the adapter 15V and the cap 20V. The interior parts 23AV and 23BV are fixed in an overlapped state inside the exterior member 22V, and form a first piston chamber 13AV and a second piston chamber 13BV that house the first piston 11AV and the second piston 11BV, respectively.

  The piston 11V is slidably loaded in the piston chamber 13V, and divides the piston chamber 13V into a pressurizing chamber 13aV and a back pressure chamber 13bV. In the back pressure chamber 13bV, a compression spring 12V is arranged coaxially with the piston 11V in a state where the piston 11V is urged in a direction approaching the valve seat 14aV.

  As shown in FIGS. 45 and 46, the piston 11V is formed by integrally forming a piston rod 11bV with a piston portion 11aV. The piston portion 11aV has a columnar shape, and has an outer diameter dimension slightly smaller than the inner diameter dimension of the interior part 23V. A mounting groove 11cV for mounting an O-ring 25V made of an elastic body such as rubber is annularly provided in the piston portion 11aV along the outer peripheral surface. A recess 11eV is formed on the lower surface of the piston 11V. An internal flow path 11dV is formed inside the piston 11V. A flow path 11fV for communicating with the pressurizing chamber 13aV is formed below the internal flow path 11dV. The channel 11fV communicates with the internal channel 11dV. That is, the air supply / exhaust port 20aV formed on the inner peripheral surface of the cap 20V communicates with the pressurizing chamber 13aV of the piston 11V via the internal flow path 11dV and the flow path 11fV of the piston 11V.

  In the fluid control valve 1V, a stem 24V is disposed in the recess 11eV of the first piston 11AV at the lower end of the two pistons 11V. On the other hand, the upper end of the piston rod 11bV of the first piston 11AV is disposed in the recess 11eV of the second piston 11BV at the upper end. Of the two pistons 11V, an O-ring 26AV for preventing air leakage is arranged on the outer peripheral surface of the piston rod 11bV of the first piston 11AV at the lower end and the lower inner peripheral portion of the interior part 23BV. Yes. On the other hand, an O-ring 26BV is disposed between the outer peripheral surface of the piston rod 11bV of the second piston 11BV at the upper end and the lower inner peripheral portion of the cap 20V.

  The lower end surfaces of the compression springs 12AV and 12BV that are urged in the direction in which the valve body 18V comes into contact with the valve seat 14aV are in contact with the upper surfaces of the piston portions 11aV of the first piston 11AV and the second piston 11BV. The upper end surface of the first compression spring 12AV is in contact with the lower surface of the interior part 23BV, and the upper end surface of the second compression spring 12BV is in contact with the lower surface of the cap 20V.

  Here, the sum (F1 + F2) of the urging force (F1) by the first compression spring 12AV and the urging force (F2) by the second compression spring 12BV causes the valve body 18V to contact the valve seat 14aV (F = F1 + F2). ), That is, a sealing force for closing the fluid control valve 1V. Note that the drag of the compression spring 19V is omitted in the description because the drag of the compression spring 19V is smaller than the force (F) that causes the valve element 18V to contact the valve seat 14aV. In addition, in the fluid control valves 2V and 3V according to other embodiments to be described later, similarly, description of the drag force of the compression spring 19V is omitted.

  Moreover, since the first compression spring 12AV and the second compression spring 12BV have the same shape, they have the same urging force (F1 = F2). That is, the urging force required for one spring is F / 2 = F1 = F2 when two pistons are overlapped. Therefore, the urging force of each spring can be lowered. That is, the stress applied to one spring can be lowered, and the durability of the spring is improved. In addition, the degree of freedom in designing the spring is increased.

  In addition, the fluid control valve 2V according to another embodiment to be described later includes six first compression springs 12AV to sixth compression springs 12FV. This is a force (F = F1 + F2 + F3 + F4 + F5 + F6) for bringing 18V into contact with the valve seat 14aV. Further, the urging force necessary for one spring is F / 6 = F1 = F2 = F3 = F4 = F5 = F6. In addition, since the fluid control valve 3V which concerns on other embodiment mentioned later has the same number of pistons as the fluid control valve 2V which concerns on other embodiment, description is omitted.

  The fluid control valve 1V supplies and exhausts air through an air supply / exhaust port 20aV formed on the inner peripheral surface of the cap 20V. The outer peripheral surface of the cap 20V is covered with an exterior member 22V, and a one-touch joint 21V is mounted on the upper surface of the cap 20V. Although not shown, an air tube is connected to the one-touch joint 21V. Thus, since an air tube can be connected on the upper surface, an increase in installation area can be prevented.

(Assembly of fluid control valve)
Next, assembly of the fluid control valve 1 according to this embodiment will be described with reference to FIG. The actuator part XV and the valve part YV are each assembled separately. Therefore, the actuator part XV can be attached or detached from the holder 16V which comprises the valve part YV.

  First, assembly of the actuator part XV will be described. The seal member 25AV is mounted in the mounting groove 11cV of the first piston 11AV and the second piston 11BV. The adapter 15V is press-fitted into one end opening of the exterior member 22V. The interior component 23AV, the piston 11AV, the compression spring 12AV, the interior component 23BV, the piston 11BV, and the compression spring 12BV are loaded into the exterior member 22V. At this time, the piston rod 11bV of the piston 11V is passed through the through hole of the interior part 23V and the through hole of the cap 20V. The cap 20V is fitted to the opening end of the exterior member 22V so as to penetrate the piston rod 11bV protruding outward from the through hole of the interior part 23V. At this stage, the interior part 23V, the piston 11V, and the compression spring 12V are temporarily held in the exterior member 22V. The both end portions of the exterior member 22V are fixed by caulking along the caulking grooves of the adapter 15V and the cap 20V.

  Next, assembly of the valve part YV will be described. As shown in FIG. 47, the holder 16V is inserted into the mounting hole 14dV of the body 14V, and the holder 16V into which the stem 24V is fitted is disposed inside the mounting hole 14dV. The body 14V and the holder 16V are fixed by welding at the welded portion 29V. Thereby, the body 14V and the holder 16V are integrally formed and sealed. As a method of fixing the body 14V and the holder 16V, a metal gasket or the like may be sandwiched and closed by press-fitting or screwing.

  Next, the actuator part XV is connected to the valve part YV. The female screw portion 15aV of the adapter 15V screwed to the body 14V is screwed into the male screw portion 16aV of the holder 16V. At this time, the stem 24V protruding from the holder 16V hits the recess 11eV of the piston 11V, and the elastic force of the compression spring 12V acting on the piston 11V is transmitted to the valve body 18V via the stem 24V, and the valve body 18V is transmitted to the valve seat. 14aV. This completes the assembly.

  In recent years, there has been an increasing demand for miniaturization of fluid control valves. However, as the size is reduced, the components of the fluid control valve are reduced in size, making it difficult to maintain sufficient strength. Therefore, if press-fitting is performed to fix the body 14V and the holder 16V, the components may be damaged.

  In the fluid control valve 1V of the present invention having a diameter comparable to that of a pencil (for example, a diameter of about 10 mm), the body 14V and the holder 16V are fixed by welding, so that there is no possibility of breakage due to press-fitting or screwing. 14V and the holder 16V can be sealed. Therefore, the strength of the valve portion Y can be ensured while realizing the miniaturization of the fluid control valve. Since the actuator part X can be easily detached from the valve part Y at the time of assembly and maintenance, work efficiency can be improved. Moreover, since the body 14V and the holder 16V are sealed, the control fluid does not leak, and safety can be improved.

(Description of fluid control valve operation)
Next, the operation of the fluid control valve 1V according to this embodiment will be described.

  In the fluid control valve 1V, when air is not supplied to the supply / exhaust port 20aV, the piston 11V is pushed down in the direction of the valve seat 14aV against the drag of the compression spring 19V by the elastic force of the compression spring 12V, and via the stem 24V. The valve body 18V is brought into contact with the valve seat 14aV. Therefore, the control fluid supplied to the inlet channel 14bV does not flow from the valve seat 14aV to the outlet channel 14cV.

  When air is supplied from the air supply / exhaust port 20aV, the air flows from the internal flow path 11dV into the pressurizing chamber 13aV through the flow path 11fV. When the air flowing into the pressurizing chamber 13aV overcomes the elastic force of the compression spring 12V in the back pressure chamber 13bV, the compression spring 12V starts to contract. Thereby, piston 11V raises. When the piston 11V rises, as shown in FIG. 42, the compression spring 19V attached to the stem 24V is not pressed in the direction of the valve seat 14aV, and the stem 24V rises due to the elastic force of the compression spring 19V. The extended bellows 17V contracts and the valve body 18V is separated from the valve seat 14aV. When the control fluid is supplied to the inlet channel 14bV in this state, the control fluid flows from the inlet channel 14bV to the outlet channel 14cV through the valve hole in the valve seat 14aV.

<Modified example of fluid control valve>
Another embodiment of the fluid control valve of the present invention will be described with reference to the drawings. FIG. 48 is a cross-sectional view of a fluid control valve 2V according to another embodiment of the present invention. In addition, about the structure which is common in embodiment mentioned above, the code | symbol same as embodiment mentioned above is attached | subjected to drawing, and description is omitted.

  In the fluid control valve 2V according to the present embodiment (the fluid control valves 17 to 19 described above), as shown in FIG. 48, six interior parts 23V having the same shape are stacked and fixed in the exterior member 22V. First, second, third, fourth, fifth and sixth pistons 11AV, 11BV, 11CV, 11DV, 11EV, 11FV (hereinafter referred to as 11AV to 11FV) and six first, second, Third, fourth, fifth, and sixth compression springs 12AV, 12BV, 12CV, 12DV, 12EV, and 12FV (hereinafter referred to as 12AV to 12FV) can be installed. The first to sixth compression springs 12AV to 12FV are coaxially attached to the first to sixth pistons 11AV to 11FV, respectively. By stacking six pistons 11V, six piston chambers 13AV, 13BV, 13CV, 13DV, 13EV, and 13FV are formed to constitute a six-stage fluid control valve.

  Here, in recent years, since various types of gas are switched in a semiconductor manufacturing apparatus, the number of valves to be installed has increased, and a reduction in the total installation area has become a problem. In order to reduce the size of the valve, a fluid control valve having a diameter similar to that of a pencil has been developed. In this case, the spring diameter of the compression spring 12V attached to the piston 11V must be small. Therefore, in order to ensure a constant sealing force when the valve is closed, it is necessary to stack a plurality of pistons 11V.

  The applicant has conducted a number of experiments and found that it is necessary to stack four or more pistons 11V in order to ensure a constant sealing force when the valve is closed. One or more compression springs 12V are coaxially attached to each of the four or more pistons 11V. In addition, like the fluid control valve 2V, when six pistons 11V are stacked and six compression springs 12V are attached one by one, a certain sealing force is surely secured, and the durability of the compression springs 12V is further improved. I found out that

As described above, according to the fluid control valves 1V and 2V of the present invention,
(1) In the fluid control valves 1V and 2V for sliding the piston 11V by the pressure of the operating fluid and bringing the valve body 18V into contact with or away from the valve seat 14aV, the first piston 11AV and the second piston 11BV are coaxially provided. In addition, one first compression spring 12AV that urges the valve body 18V in a direction to contact the valve seat 14aV is coaxially attached to the first piston 11AV, and a valve body is attached to the second piston 11BV. Since one second compression spring 12BV that urges 18V in a direction to contact the valve seat 14aV is coaxially mounted, the first compression spring 12AV is connected to the first piston 11AV by the second Since the second compression spring 12BV is attached in series to the piston 11BV, the width of the fluid control valves 1V and 2V can be reduced and the size can be reduced. . Therefore, the entire installation area can be reduced.

  In order to increase not only the two pistons 11V (first piston 11AV, second piston 11BV) but also the sealing force for closing the valve, for example, even if six pistons 11V are loaded, the height of the actuator portion X increases. Only. That is, while increasing the sealing force, the width of the fluid control valve itself remains narrow, and the installation area does not change. Therefore, regardless of the number of pistons 11V, the fluid control valve can be reduced in size, and the entire installation area can be reduced. Regardless of the number of pistons 11V, the sealing force required for valve closing can be easily set by simply combining an arbitrary number of pistons 11V according to the material and shape of the valve body 18V and the required Cv value. It becomes possible to do. Furthermore, even if any one of the compression springs 12V is deteriorated, the urging force of the other compression springs 12V ensures that the valve body 18V is not out of balance and tilted, and a uniform sealing force is secured to the valve seat 14aV. can do.

  (2) In the fluid control valves 1V and 2V described in (1), the first piston 11AV and the second piston 11BV have the same shape, and the first compression spring 12AV and the second compression spring 12BV are the same. Since it is characterized by having a shape, when a plurality of pistons 11V and compression springs 12V are combined, they have the same shape, so that the parts can be shared. Therefore, it is not necessary to separately prepare pistons and compression springs of other shapes, and the cost for manufacturing can be reduced when parts are manufactured by molding. Furthermore, by sharing the parts, work efficiency can be improved during assembly.

  (3) In the fluid control valves 1V and 2V described in (1) or (2), the sum of the urging force by the first compression spring 12AV and the urging force by the second compression spring 12BV Therefore, the sum of the urging forces of the first compression spring 12AV and the second compression spring 12BV is a sealing force for closing the fluid control valves 1V and 2V. Therefore, the spring stress of the compression spring 12V can be lowered. Therefore, the durability of the compression spring 12V can be improved. Further, the degree of freedom in designing the compression spring 12V is increased, and the design / manufacturing is facilitated. Furthermore, even if the tolerance varies, it is possible to ensure a sealing force necessary for closing the valve.

  (4) In the fluid control valves 1V and 2V according to any one of (1) to (3), a holder 16V is fixed to an upper portion of the body 14V where the valve seat 14aV is formed, and the valve body 18V Since the bellows 17V is arranged between the holders 16V, it is possible to obtain a long stroke within a smaller diameter as compared with the diaphragm valve body.

  (5) In the fluid control valves 1V and 2V according to any one of (1) to (4), a holder 16V is fixed to the upper portion of the body 14V where the valve seat 14aV is formed by welding. Therefore, the actuator part XV can be easily removed during assembly and maintenance, and the work efficiency can be improved. Moreover, since the body 14V and the holder 16V are sealed, the control fluid does not leak, and safety can be improved.

  (6) In the fluid control valve according to (5), the actuator part XV including the piston 11V is detachable from the holder 16V. They can be exchanged and work efficiency can be improved.

  (7) The fluid control valves 1V and 2V according to any one of (1) to (6) are characterized by having a tube-shaped exterior member 22V, so that assembly can be easily performed. .

  (8) The fluid control valves 1V and 2V according to (7) are characterized by having the one-touch joint 21V on the upper surface of the cap 20V attached to the tip of the exterior member 22V. Since the one-touch joint 21V can be arranged on the upper surface of the cap 20V and the air tube can be connected on the upper surface, an increase in the installation area can be prevented.

<Other variations of fluid control valve>
Another embodiment of the fluid control valve of the present invention will be described with reference to the drawings. FIG. 49 is a cross-sectional view of a fluid control valve 3V (fluid control valves 17 to 19 described above) according to another embodiment of the present invention. In addition, about the structure which is common in embodiment mentioned above, the code | symbol same as embodiment mentioned above is attached | subjected to drawing, and description is omitted.

  In embodiment mentioned above, it demonstrated using the bellows 17V for the valve part YV of the fluid control valve 1. FIG. However, in the fluid control valve 3V according to the present embodiment, as shown in FIG. 49, the valve portion YV constitutes the fluid control valve 3V using not the bellows 17V but the diaphragm valve body 31V.

  An inlet channel 14bV and an outlet channel 14cV are provided on the lower surface of the body 14V of the valve portion Y. A mounting hole 14dV is formed in a cylindrical shape on the upper surface of the body 14V. A valve seat 32V is annularly provided at the center of the bottom wall of the mounting hole 14dV, and the inlet flow path 14bV and the outlet flow path 14cV communicate with each other via the valve seat 32V.

  The valve portion YV has a diaphragm valve body 31V mounted in the mounting hole 14dV of the body 14V, the outer edge portion of the diaphragm valve body 31V is pressed by the holder 34V, and between the inner peripheral surface of the mounting hole 14dV and the outer peripheral surface of the holder 34V. By screwing the inserted adapter 33V into the body 14V, the outer edge portion of the diaphragm valve body 31V is sandwiched between the body 14V and the holder 34V. The diaphragm valve body 31V is made of a thin film made of resin, metal, or the like so that it can be deformed. The holder 34V and the adapter 33V are made of metal having heat resistance and rigidity. The holder 34V is loaded with a metal stem 30V so as to be in contact with the diaphragm valve body 31V, and the driving force of the actuator portion XV is transmitted to the diaphragm valve body 31V via the stem 30V.

As described above, according to the fluid control valve 3V of the present invention,
(1) In the fluid control valve 3V that slides the piston 11V by the pressure of the operating fluid and makes the diaphragm valve body 31V contact or separate from the valve seat 32V, the first piston 11AV and the second piston 11BV are coaxially provided. The first piston 11AV is coaxially mounted with one first compression spring 12AV that urges the diaphragm valve body 31V in a direction to contact the valve seat 32V, and the second piston 11BV has a diaphragm valve. Since one second compression spring 12BV that urges the body 31V in the direction in which the body 31V abuts on the valve seat 32V is coaxially mounted, the first compression spring 12AV is attached to the first piston 11AV. Since the second compression spring 12BV is attached in series to the two pistons 11BV, the width of the fluid control valve 3V is narrowed and small. It can be of. Therefore, the entire installation area can be reduced.

<Reference example of fluid control valve>
The piston 11V having the same shape can also be applied to a NO type fluid control valve. FIG. 50 is a cross-sectional view of the fluid control valve 4V (the fluid control valves 17 to 19 described above) according to the reference example. Compared to the NC type fluid control valves 1V, 2V, and 3V, the compression spring 12V is not biased in the direction in which the valve body 18V contacts the valve seat 14aV, and the compression spring 12V includes a plurality of pistons 11V. Among these, it is different in that it is not attached to each piston. In addition, about the structure which is common in embodiment mentioned above, the code | symbol same as embodiment mentioned above is attached | subjected to drawing, and description is omitted.

  The fluid control valve 4V is attached so that the piston part 11aV of the piston 11V is at the upper part and the piston rod 11bV is at the lower part as compared with the NC type fluid control valves 1V, 2V, 3V. The compression spring 12AV is attached only to the first piston 11AV arranged at the bottom. One end of the compression spring 12AV is in contact with the first piston 11AV, and the other end is in contact with a component 35V attached to the adapter 15V. The compression spring 12AV biases the valve body 18V in a direction away from the valve seat 14aV. Thereby, the piston 11V having the same shape can be applied not only to the NC type but also to the NO type.

  In the NO type fluid control valve, only one compression spring 12AV is used in the fluid control valve 4V according to the reference example. However, when a plurality of pistons are used, one compression spring 12V is attached to one piston 11V. Also good. For example, in the fluid control valve 4V according to the reference example, one compression spring 12V may be attached to each of the pistons 11AV to 11FV.

  In addition, this embodiment is only a mere illustration and does not limit this invention at all. Accordingly, the present invention can naturally be improved and modified in various ways without departing from the gist thereof.

  For example, two pistons 11V are stacked in the above-described embodiment, and six pistons 11V are stacked in the other embodiments, but any number of pistons 11V may be stacked.

  For example, in the embodiment described above, air is used as the operation fluid, but the operation fluid may be an inert gas.

<Flow path in valve mounting block>
FIG. 51 is a cross-sectional view showing the vicinity of the flow path in the valve mounting block 60. In the valve mounting block 60, an inlet channel 14bV (inlet channel 14bV through which process gas or purge gas flows in, an outlet channel 14cV through which process gas or purge gas flows out, an inlet channel 14dV (exit channel 14dV) that communicates with the outlet channel 14cV (outlet channel 14cV). Valve chamber) is formed.

  The inlet flow path 14bV is connected to the connection flow path 23 via the outlet port 23b. The outlet flow path 14 cV is connected to the supply side internal gas line 27 via the process gas supply port 26. Then, the valve body 18V of the fluid control valve 19 is driven so as to communicate and block the mounting hole 14dV and the outlet flow path 14cV by separating and abutting against the valve seat 14aV. That is, the mounting hole 14dV and the bellows 17V having a large volume and a complicated shape are arranged on the upstream side of the blocking portion. With such a configuration, in a state where the valve body 18V blocks the mounting hole 14dV and the outlet flow path 14cV, the amount of gas staying between the supply-side internal gas line 27 on the downstream side of the blocking section and the valve body 18V. Can be reduced.

  FIG. 52 is a cross-sectional view showing the vicinity of the flow path in the valve mounting block 40. In the valve mounting block 40 (left side in the figure), an inlet channel 14bV (first inlet channel) into which process gas (first fluid) flows, and an outlet channel 14cV (first outlet flow) into which process gas flows out. ), An attachment hole 14dV (first valve chamber) communicating with the inlet channel 14bV and the outlet channel 14cV is formed. Further, in the valve mounting block 40 (right side in the figure), an inlet flow path 14bV (second inlet flow path) into which purge gas (second fluid) flows and an outlet flow path 14cV (second outlet flow) from which purge gas flows out. ), An attachment hole 14dV (second valve chamber) communicating with the inlet channel 14bV and the outlet channel 14cV is formed.

  The left inlet channel 14bV is connected to the connection channel 21 via the outlet port 21b. The outlet flow path 14cV is connected to the connection flow path 22 via the inlet port 22a. The right inlet channel 14 bV is connected to the internal purge gas line 25 via the purge gas supply port 24. The outlet flow path 14cV is connected to the connection flow path 22 via the inlet port 22a. The two outlet channels 14cV communicate with each other.

  On the left side of the figure, the valve element 18V of the fluid control valve 17 (one fluid control valve) is separated from and abutted against the valve seat 14aV, so that the mounting hole 14dV (first valve chamber) and the outlet flow Driven to communicate with and shut off the path 14cV (first outlet channel). Also, on the right side of the figure, the valve element 18V of the fluid control valve 18 (the other fluid control valve) is separated and abutted against the valve seat 14aV, so that the mounting hole 14dV (second valve chamber) and the outlet flow It is driven so as to communicate and block the path 14cV (second outlet channel).

  That is, the mounting hole 14dV and the bellows 17V having a large volume and a complicated shape are arranged on the upstream side of the blocking portion. With such a configuration, in both fluid control valves 17 and 18, the amount of gas remaining on the downstream side of the blocking portion is reduced in a state where the valve body 18 </ b> V blocks the mounting hole 14 dV and the outlet flow path 14 cV. Can do. Therefore, at the time of switching between the process gas and the purge gas, it is possible to reduce the amount of the retained gas before switching that is mixed in the gas after switching.

  Other modifications not specifically mentioned are naturally included in the technical scope of the present invention without departing from the essential part of the present invention. In addition, in each element constituting the means for solving the problems of the present invention, elements expressed in terms of function and function are specific configurations disclosed in the above-described embodiments and modifications, and equivalents thereof. In addition to objects, any configuration capable of realizing the action / function is included.

  DESCRIPTION OF SYMBOLS 1 ... Pipe joint, 2 ... Main-body part, 2a ... Joint surface, 2g ... 1st opening part, 2k ... 1st bolt insertion hole, 2m ... 2nd bolt insertion hole, 2p ... 2nd opening part, 4 ... 1st channel | path DESCRIPTION OF SYMBOLS 5 ... 2nd channel | path, 6 ... Opening side channel | path, 7 ... Intermediate channel, 10 ... Gas supply apparatus, 10A-10H ... Gas supply unit, 11 ... Process gas inflow line, 12 ... Purge gas inflow line, 13 ... Process gas supply Line 14, internal main gas flow path 15, internal purge gas flow path 16, flow controller, 17 to 19 fluid control valve, 19 a, 19 b fluid control valve actuator, 20 flow path block, 20 a upper surface 20b ... lower surface, 21-23 ... connection flow path, 24 ... purge gas supply port, 25 ... internal purge gas line, 26 ... process gas supply port, 27 ... supply side internal gas line, 28a-28d Female screw part, 30 ... Inflow side flange, 31 ... Flange part, 32 ... Pipe part, 33 ... Mounting bolt, 40 ... Valve mounting block, 41 ... Mounting bolt, 50 ... MFC mounting part, 51 ... Mounting bolt, 60 ... Valve Mounting block, 61 ... Mounting bolt, 201 ... First connection piece, 202 ... Second connection piece, 211 ... First connection opening, 212 ... First connection path, 221 ... Second connection opening, 222 ... Second connection Road, 28a-28d ... Female screw part, 290 ... Bypass piping, 1V-3V ... Fluid control valve, 11V ... Piston, 11AV ... First piston, 11BV ... Second piston, 12V ... Compression spring, 12AV ... First compression spring , 12BV ... second compression spring, 13V ... piston chamber, 14V ... body, 14aV ... valve seat, 15V ... adapter, 16V ... holder, 17V ... bellows, 18V ... valve body, 20V ... Cap, 21V ... Fittings, 22V ... exterior member, 23V ... interior parts, 31V ... diaphragm valve element, 32V ... valve seat, XV ... actuator, YV ... valve unit.

Claims (16)

A pipe joint that is configured to be fixable to a predetermined mounting object by a screw and has a fluid passage inside,
It is a member formed in a substantially rectangular parallelepiped outer shape having a predetermined longitudinal direction, and is a plane provided so as to be joined to the mounting object with the height direction orthogonal to the longitudinal direction as a normal line A main body having a joining surface;
A first opening provided to open at the joint surface;
A second opening provided to open at the first end surface in the longitudinal direction of the main body;
A hole formed along the height direction so that the screw can be inserted between the first end surface side and the second end surface side in the longitudinal direction of the main body portion across the first opening. A pair of screw insertion holes provided;
Have
The pipe joint, wherein the fluid passage leading from the first opening to the second opening is formed so as to bypass the screw insertion hole. The pipe joint according to claim 1,
The fluid passage is
A first passage which is the fluid passage provided along the height direction from the first opening;
A fluid passage provided along the longitudinal direction so as to pass through the second opening and connect to the first passage, the second passage formed so as to bypass the screw insertion hole; ,
Have
The second passage is
A non-through hole formed from the second opening portion along the longitudinal direction so as not to reach the flow passage side screw insertion hole provided on the first end surface side in the main body portion of the pair of screw insertion holes. An opening side passageway,
The channel side screw insertion hole is not communicated with the channel side screw insertion hole at a position closer to the side surface than the flow channel side screw insertion hole, which is a plane whose normal is the width direction perpendicular to the longitudinal direction and the height direction. An intermediate passage formed along the longitudinal direction so as to pass through the side of the screw insertion hole;
Have
The intermediate passage is provided such that one end thereof communicates with the first passage and the other end communicates with an end portion on the flow passage side screw insertion hole side in the opening side passage. . The pipe joint according to claim 2,
A third opening provided to open at the second end surface in the longitudinal direction of the main body;
The fluid passage is
A fluid passage provided along the longitudinal direction so as to pass through the third opening and to be connected to the first passage, the third passage formed to bypass the screw insertion hole; Have
The third passage is
A non-through hole formed along the longitudinal direction from the third opening so as not to reach the second screw insertion hole provided on the second end surface side in the main body portion of the pair of screw insertion holes. An opening side passageway,
The second screw insertion hole does not communicate with the second screw insertion hole at a position closer to the side surface, which is a plane whose normal is the width direction orthogonal to the longitudinal direction and the height direction, than the second screw insertion hole. An intermediate passage formed along the longitudinal direction so as to pass through the side of the screw insertion hole;
Have
The intermediate passage is provided such that one end communicates with the first passage and the other end communicates with an end of the opening-side passage on the second screw insertion hole side. . The pipe joint according to claim 2 or 3,
The pipe joint according to claim 1, wherein the intermediate passage is a space formed by airtightly or liquidtightly closing a groove formed from the side surface with a flat lid portion. The pipe joint according to claim 2 or 3,
The pipe joint according to claim 1, wherein the first passage is provided as a through hole penetrating in the height direction from the first opening. The pipe joint according to any one of claims 1 to 3,
A pipe joint characterized in that the central axis of the second opening intersects with the central axis of the first opening. A fluid supply control device comprising the pipe joint according to any one of claims 1 to 3,
The fluid supply control device includes a flow path block having an internal flow path through which the fluid flows, and a plurality of fluid control devices mounted on the flow path block while being arranged along the internal flow path. And comprising
The pipe joint is configured to be connected to an inlet / outlet of the fluid provided in the flow path block with the flow path block as the mounting target.
The screw insertion hole is formed as a through hole having no screw part,
The fluid supply control device according to claim 1, wherein the joint surface is formed so as to be connected to an inlet / outlet of the fluid provided in the flow path block. The fluid supply control device according to claim 7,
The fluid control device is detachably attached to the flow channel block by a pair of female screw portions provided in the flow channel block,
The flow direction of the fluid in the flow path block includes a pair of female screw portions and a connection flow path that is the internal flow path provided in the flow path block so as to connect different fluid control devices. A fluid supply control device, wherein the fluid supply control device is arranged in a substantially straight line along an arrangement direction of the plurality of fluid control devices, which are parallel to each other. The fluid supply control device according to claim 8,
The female screw portion is formed as a non-through hole that opens on the mounting surface so that the fluid control device is mounted on the mounting surface side that is the surface on which the entrance / exit in the flow path block is formed,
The fluid supply control device according to claim 1, wherein the connection flow path is formed so as to bypass the female screw portion in a depth direction of the female screw portion. The fluid supply control device according to claim 9,
The fluid supply control device, wherein the flow path block is configured to be mounted while arranging a plurality of sets of the fluid control devices arranged in the arrangement direction in a direction orthogonal to the arrangement direction. . The fluid supply control device according to claim 7,
The plurality of fluid control devices include
A fluid control valve configured to be able to switch between flow and block of the fluid;
A flow rate controller configured to control the flow rate of the fluid;
Contains
The fluid supply control device according to claim 1, wherein the actuators of the two fluid control valves are mounted on the flow path block via a common mounting block. The fluid supply control device according to claim 11,
The mounting block communicates with the first inlet channel through which the first fluid flows, the first outlet channel through which the first fluid flows out, the first inlet channel and the first outlet channel. The first valve chamber, the second inlet channel into which the second fluid flows, the second outlet channel from which the second fluid flows out, the second inlet channel and the second outlet channel. A second valve chamber communicating therewith,
The valve body of one of the fluid control valves is driven to communicate and block the first valve chamber and the first outlet flow path, and the valve body of the other fluid control valve is driven to the second valve chamber. And the second outlet channel, and the first outlet channel and the second outlet channel communicate with each other, and the fluid supply control device is characterized in that the first outlet channel and the second outlet channel communicate with each other. The fluid supply control device according to claim 11,
The fluid supply control device according to claim 1, wherein a width of the mounting block is formed to be substantially the same as a width of the fluid control valve in a direction orthogonal to the arrangement direction. The fluid supply control device according to claim 8,
The fluid supply control device according to claim 1, wherein the pipe joint is provided on an end surface of the flow path block in the arrangement direction. A pair of the pipe joints according to claim 1 or 2,
One of the pair of pipe joints has the screw insertion hole which is the through hole not having a screw part, the other being the mounting target,
The pipe connection structure according to claim 1, wherein the other of the pair of pipe joints has the screw insertion hole which is the non-through hole having the screw part as the mounting target. The pipe connection structure according to claim 15,
Each of a pair of said piping joint is comprised so that the center axis line of said 2nd opening part may intersect with the center axis line of said 1st opening part, The pipe connection structure characterized by the above-mentioned.

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