JP2020034131A - valve - Google Patents

Abstract

To provide a valve which can be easily installed at a location where a number of pipelines are installed and achieves improvement of earthquake resistance.SOLUTION: A valve 1 has: a valve body 10 provided with a fluid passage 11 and having a recessed portion 12 opening in a direction parallel to a fluid flow direction; a valve body 21 which contacts with or separates from a valve seat 17 included in the valve body 10 to open or close the passage; a stem 20 having the valve body 21 at one end part on the passage 11 side; and an actuator 30 which moves the stem 20 along an axis which is coaxial with or parallel to the fluid flow direction so as to open or close the passage 11. The other end part of the stem 20 protrudes from the actuator 30, has a fluid introduction port 23 which introduces a fluid to a side surface of the stem 20 in the recessed portion 12, and has an internal passage 25 connecting to the fluid introduction port 23 at an axial interior of the stem 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a valve that opens and closes a flow path, and more particularly to a valve that can dispose a valve body in parallel with the flow path by moving a valve body in a fluid flow direction.

  The valve disclosed in Patent Document 1 is a control valve for high-pressure fluid, and the structure thereof is, as shown in FIG. 5, a valve body 102 having an inflow channel 123 and an outflow channel 124, and a channel of the valve body 102. The valve body 103 includes a valve body 103 that opens and closes the valve by contacting and separating the valve body 125 with the valve seat 125 by vertical movement, and an actuator 104 that vertically moves the valve body 103. The actuator 104 is provided with a shaft 141 that moves up and down by the operation of the actuator 104. The shaft 141 and the valve body 103 are connected by the stem 105. The connection between the shaft 141 and the stem 105 has a connection structure 110.

  The stem 105 fits into the upper recess of the valve body 102, penetrates through the inside of the bonnet 108 connected by the bonnet nut 181, and the bonnet 108 and the actuator 104 are connected by the yoke 109.

JP 2018-96473 A

  Like the control valve described in Patent Literature 1, a stem interposed between a valve body and an actuator is generally installed in a direction perpendicular to a fluid flow direction, and a distance between the valve body and the actuator is long.

  A large number of pipes are used in a factory or a plant in which a semiconductor manufacturing apparatus or a hydrogen station is installed, and a member such as a bonnet, a yoke, and an actuator is required in a direction perpendicular to the pipes. In a general valve, if many pipes are arranged in the direction of fluid flow, it may not be possible to install the valve where it is desired to be installed. there were.

  Further, in the general valve described in Patent Document 1, since the distance to the actuator connected to the valve body is long, seismic measures must be taken separately so that the valve is not affected by vibration such as an earthquake. In some cases.

  In a conventional valve, such a problem is inevitable because a stem for controlling a valve body is provided in a direction perpendicular to the flow direction of the fluid, and no valve that solves this problem has been developed. .

  An object of the present invention is to provide a valve which can be easily installed even in a place where many pipes are installed and has improved earthquake resistance.

  The present invention (1) provides a valve body provided with a fluid flow path and having a recess opened in a direction parallel to a fluid flow direction, and a valve seat provided in the valve body and abutting and separating from the valve body. A valve having a valve body for opening and closing a flow path, a stem having the valve body at one end, and an actuator for moving the stem along a fluid flow direction for opening and closing the flow path. The stem forms a fluid introduction port for introducing fluid to the peripheral surface of the stem and / or the valve body in the recess, and forms an internal flow path connected to the fluid introduction port inside the stem in the axial direction. The other end is a valve protruding from the actuator.

  The present inventors have created a valve having a new structure that fundamentally solves the problem of the installation location and the problem of seismic resistance, which seem to be unsolvable, of the conventional valve. This new creation is a breakthrough in that a stem connecting the valve body and the actuator is arranged along the flow direction of the fluid, and the fluid flows inside the stem.

  The present invention (1) has a valve body, a valve body, a stem, and an actuator as main components. The fluid that has entered the inside of the valve body from the flow path of the valve body flows into the inside of the stem through a fluid introduction port formed in the stem, and flows toward the actuator through an internal flow path formed in the stem in the axial direction. The stem protrudes from the actuator, and the fluid that has passed through the internal flow passage of the stem flows out of the valve through the inside of the actuator.

  In the present invention (1), since the stem is arranged in the flow direction of the fluid, the valve can be mounted along the pipe through which the fluid flows, so that the space for installing the valve is reduced as compared with the conventional valve. Can be space. In addition, since the structure of the valve from the valve body to the actuator is set between the pipes through which the fluid flowing through the valve passes, the moment applied to the valve with respect to shaking is small and the influence on vibration is reduced. , Improves earthquake resistance.

  The present invention (2) is characterized in that part or all of the other end side of the stem protruding from the actuator is formed of a flexible member that can expand and contract in a direction parallel to a fluid flow direction. The valve according to the present invention (1).

  When the stem is moved in the fluid flow direction by the actuator, the actuator-side end surface of the stem is moved in the fluid flow direction. When the fluid flows from the valve body side to the actuator side, the fluid flows out from the actuator-side end face of the stem, so that it must be flexibly connected to the pipe connected to the valve outflow side. As in the invention described in the present invention (2), a part or the whole of the stem is formed of a flexible member that can expand and contract in the flow direction of the fluid, so that there is no problem with the pipe connected to the outflow side. Can be connected.

  The present invention (3) provides a body provided with a fluid flow path and having a recess opened in a direction parallel to the flow direction of the fluid, and a valve seat provided on a bottom surface of the recess to contact the body with the flow. A valve that opens and closes a passage, a stem having the valve body at one end, and an actuator that moves the stem along a flow direction of fluid for opening and closing the flow path, wherein the valve The actuator has a through hole at an end opposite to the valve body in a direction coaxial or parallel with the stem, and the stem is provided with a fluid on a peripheral surface of the stem and / or the valve body in the recess. And an internal flow path connected to the fluid introduction port is formed inside the stem in the axial direction, the other end is in the through hole, and the stem is provided in the through hole. Activate fluid away from the other end of the Outflow pipe to and out flow to the eta outside is disposed, the distance between the opposing end surfaces of the outlet pipe and the stem is a valve, characterized in that longer than the movable distance of the stem.

  In the present invention (2), since part or all of the stem protruding from the actuator is formed of a flexible member that can expand and contract in the fluid flow direction, there is no problem with piping connected to the outflow side. Can be connected. The present invention (3) has a structure which can be connected to the inflow / outflow pipe on the actuator side without using a flexible member as in the present invention (2).

  By adopting the structure of the present invention (3), part or all of the stem protruding from the actuator can be connected to the pipe without using a flexible member, so that the structure can be simplified and the manufacturing cost can be reduced. it can.

  ADVANTAGE OF THE INVENTION According to the valve of this invention, the space for installing a valve can be made small compared with the conventional valve, and since the valve can be arrange | positioned in parallel with a flow path, it is more earthquake-resistant than the conventional valve. Can be improved.

1 is a longitudinal sectional view showing Embodiment 1 of a valve according to the present invention. FIG. 6 is a longitudinal sectional view showing Embodiment 2 of the valve according to the present invention. It is a longitudinal section showing Example 3 of the valve by this invention. FIG. 7 is a vertical sectional view showing a fourth embodiment of the valve according to the present invention. It is a partial longitudinal section of the valve of patent documents 1.

  Hereinafter, preferred embodiments of the present invention will be illustratively described in detail with reference to the drawings. However, unless otherwise specified, the shapes and relative arrangements of the components described in this embodiment are not intended to limit the scope of the present invention, but are merely illustrative examples.

  In FIG. 1, the fluid flows from left to right. As shown in FIG. 1, the valve 1 includes a valve body 10 having a flow path 11, a valve element 21 that opens and closes the flow path 11 by right and left movement, an actuator 30 that moves the valve element 21 left and right, and an actuator 30. It has a stem 20 which is moved left and right by a moved piston 32.

  A first joint member 60 is attached to a left end surface of the valve body 10. The first joint member 60 includes a nut 61, a first pipe 63, and a bearing 64, and the nut 61 is provided with a female screw 62 for connecting to another pipe. The first pipe 63 has a first pipe flow path 66 formed therein. The first pipe 63 is welded at the welded portion 65 on the left end surface of the valve body 10, and the first pipe flow path 66 and the flow path 11 are airtight. Is in communication with

  The valve body 10 has a recess 12 that opens in the direction of fluid flow on the actuator 30 side, and a protrusion 13 that projects to the right. A male screw 14 is provided on the outer periphery of the right end of the protrusion 13. A cover member 15 is fitted into the right opening of the recess 12, and the space between the protrusion 13 and the cover member 15 is sealed with an O-ring 28. A bonnet 16 is in contact with the right end surface of the lid member 15, and the bonnet 16 and the lid member 15 are fixed to the valve body 10 by a bonnet fixing nut 26. The fixing is performed by engaging the male screw portion 14 and the bonnet fixing nut female screw portion 26b. The bonnet 16 passes through a bonnet fixing nut through hole 26 a formed in the center of the bonnet fixing nut 26. The cover member 15 and the bonnet 16 have a cover member through hole 15a and a bonnet through hole 16a, respectively, penetrating in the axial direction of the stem 20, and the stem 20 penetrates these through holes.

  A valve body 21 is formed at one end (left side in the figure) of the stem 20, and a flange 24 is formed at the valve body 21 side. A bellows 27 is provided between the right end surface of the flange portion 24 in the illustrated example and the left end surface of the lid member 15 in the illustrated example, and is sealed so that fluid does not leak outside. A contact member 22 is provided on the valve body 21 at one end of the stem 20, and the valve member 17 is brought into contact with and separated from the valve seat 17 of the valve body 10 to open and close the valve. The contact member 22 is not particularly limited as long as it can ensure airtightness with the valve seat 17. In the present embodiment, an annular elastic member (for example, a seal ring such as an O-ring) is used. Used. The bellows 27 does not need to be provided depending on the fluid used.

  The actuator 30 has a bottomed cylindrical actuator body 31, and a through hole into which an end of the bonnet 16 is fitted is formed on the bottom surface of the actuator body 31. The actuator body 31 and the bonnet 16 are fixed by a bonnet fixing member 37. The actuator body 31 has an actuator body male screw portion 40 formed on the outer peripheral surface on the open end side, and the actuator cover female screw portion 41 formed on the inner peripheral surface on the open end side of the bottomed cylindrical actuator cover 33 and a screw. Fitted and fixed. A piston 32 is disposed inside the actuator 30, and the piston 32 is fixed to the stem 20 by a stem fixing member 38.

  A piston through hole 32 a is formed in the center of the piston 32, and an actuator cover through hole 33 a is also formed in the center of the actuator cover 33. The stem 20 penetrates through the cover member through-hole 15a, the hood through-hole 16a, the piston through-hole 32a, and the actuator cover through-hole 33a, and protrudes from the closed end side of the actuator cover 33 to the outside.

  A fluid introduction port 27 is opened near the valve body 21 of the stem 20, from which the fluid flows into the inside of the stem 20 and flows out from the right end of the stem 20 to the outside through an internal flow path 25 formed inside the stem 20. I do. In the present embodiment, the fluid introduction port 27 is opened on the peripheral surface of the stem 20 located in the recess. However, the fluid introduction port 27 is opened on the valve body 21 where there is no problem in securing confidentiality. It can be open to both.

  An O-ring 28 seals between the stem 20 and the bonnet 16 and between the stem 20 and the piston 32. The actuator body 31 is provided with a drive gas inlet 35 from which a drive gas is introduced into the piston control space 36. The space between the piston 32 and the bonnet body 31 is sealed by an O-ring 39.

  A spring 34, which is a compression coil spring, is provided between the actuator cover 33 and the piston 32, and the piston 32 is constantly biased to the left. When the driving gas is introduced into the piston control space 36 and the internal pressure increases, and a force greater than the urging force of the spring 34 is applied to the right, the stem 20 connected to the piston 32 moves to the right and the valve is opened. Become. Conversely, when the driving gas is removed and the internal pressure of the piston control space 36 decreases and the urging force of the spring 34 overcomes, the stem 20 connected to the piston 32 moves to the left, and the valve is closed.

  To the right of the actuator 30 is a second joint member 70. The second joint member 70 includes a nut 71, a second pipe 73, and a bearing 74, and the nut 71 is provided with a female screw 72 for connecting to another pipe. The second pipe 73 has a second pipe flow path 76 formed therein. The second pipe 73 is connected to the stem 20 via a flexible tube (flexible member) 50. And the flexible tube 50 are air-tightly communicated. The flexible tube 50 may be configured by connecting the flexible tube 50 to the other end of the stem 20 in addition to forming a part of the other end of the stem 20 with a flexible member.

  By adopting the structure shown in FIG. 1, even in a situation where a large number of pipes are arranged, the space for installing the valve can be small, so that the valve can be installed in a place where it is needed. Also, the earthquake resistance of the valve can be improved.

  The valve 1 of the first embodiment shown in FIG. 1 is an automatic valve driven by gas, while the valve 1 of the second embodiment shown in FIG. 2 is a manual valve. The description of the same structure as in FIG. 1 is omitted.

  A bonnet projection male screw 16c is formed near the end of the projection 16b protruding from the valve body 10 of the bonnet 16 and is engaged with a handle female screw 42a cut on the inner surface of the center through hole of the handle 42. A stem fixing member 47 is attached to an end surface of the bonnet protruding portion 16b, and is fixed to the stem 20. The bearing 43 is attached to the stem fixing member 47.

  The stem 20 penetrates the bonnet through hole 16a and protrudes outward (to the right in the drawing) from the handle. In the manual valve having the structure shown in FIG. 2, as in the case of the automatic valve shown in FIG. Can be installed in Also, the earthquake resistance of the valve can be improved. The other end (projecting end) of the stem 20 projecting from the handle 42 is connected to the stem 20 via the flexible tube 50 as in the first embodiment. Further, a structure similar to the characteristic structure of the third embodiment described later may be formed on the protruding portion 16b so that the flexible tube 50 is not interposed.

  FIG. 3 is a longitudinal sectional view of the third embodiment. Since the cover member 15 of FIG. 1 is integrated with the bonnet 16, the cover member 15 is not required. The bonnet fixing nut 26 shown in FIG. 1 is eliminated, and the female threaded portion 31a of the actuator body and the male threaded portion 14 on the inner surface of the concave portion formed at the open end of the actuator body 31 are screwed into the valve body 10, the bonnet 16 and the actuator 30. And are integrated.

  A thick convex portion 46a is formed from the inner end surface 45 of the actuator cover 33, and a through hole 46a is formed at the center thereof. The stem 20 is inserted into the through hole 46a from the left side in the figure, and the inflow / outflow pipe 78 is inserted from the right side, and the stem 20 and the inflow / outflow pipe 78 are separated from each other. The separation distance is set to be larger than the movable distance of the stem 20, and the two are prevented from coming into contact by the operation of the stem 20.

  The O-ring 28 seals the gap between the outer peripheral surface on the other end side of the stem 20 and the inner surface of the through hole 46a of the convex portion 46, and the gap between the outer peripheral surface of the inflow / outflow tube 78 and the inner surface of the through hole 46a of the convex portion 46. Sealed with an O-ring 77. Since the internal flow passage 25 of the stem 20 and the outflow / inflow pipe flow passage 79 communicate with each other, and the flexible tube 50 as shown in the first or second embodiment does not need to be interposed, the manufacturing cost can be reduced.

  FIG. 4 is a longitudinal sectional view of the fourth embodiment. The difference from the third embodiment shown in FIG. 3 is that the bonnet 16 and the bellows 27 are eliminated to make the structure simple. With this simple structure, the manufacturing cost can be reduced. 3 and 4 can also be applied to the configuration of the first embodiment.

1: Valve (Examples 1 and 2)
2: Valve (Examples 3 and 4)
10: Valve body 11: Flow path 12: Recess 13: Projection 14: Male thread 15: Lid member 15a: Lid member through hole 16: Bonnet 16a: Bonnet through hole 16b: Bonnet projection 16c: Bonnet projection male screw 17 : Valve seat 20: Stem 21: Valve element 22: Contact member 23: Fluid introduction port 24: Flange part 25: Internal flow path 26: Bonnet fixing nut 26a: Bonnet fixing nut through hole 26b: Bonnet fixing nut female screw part 27: Bellows 28: O-ring 29: Spring 30: Actuator 31: Actuator body 31a: Actuator body internal thread 32: Piston 32a: Piston through hole 33: Actuator cover 33a: Actuator cover through hole 34: Spring 35: Drive gas inlet 36: Piston control space 37: B Net fixing member 38: Stem fixing member 39: O-ring 40: Actuator body male screw part 41: Actuator cover female screw part 42: Handle 42a: Handle female screw 43: Bearing 45: Inner end surface 46: Convex part 46a: Through hole 47: Stem fixing Member 50: Flexible tube (flexible member)
60: first joint member 61: nut 62: female screw 63: first pipe 64: bearing 65: welded portion 66: first pipe flow path 70: second joint member 71: nut 72: female screw 73: second pipe 74 : Bearing 76: second piping flow path 77: O-ring 78: outflow / inflow pipe 79: outflow / inflow pipe flow path

Claims (3)

A valve body provided with a fluid flow path and having a recess opened in a direction parallel to the fluid flow direction;
A valve body that opens and closes the flow path by contacting and separating with a valve seat provided on the valve body,
A stem having the valve body at one end,
An actuator for moving the stem along the flow direction of the fluid for opening and closing the flow path,
The stem forms a fluid inlet for introducing a fluid to the peripheral surface of the stem and / or the valve body in the recess, and forms an internal flow path connected to the fluid inlet inside the stem in the axial direction. , The other end protruding from the actuator.   The part or whole of the other end side of the stem protruding from the actuator is constituted by a flexible member that can expand and contract in a direction parallel to a fluid flow direction. Valve. A body provided with a fluid flow path and having a recess opened in a direction parallel to the fluid flow direction;
A valve body that opens and closes the flow path by contacting a valve seat provided on the bottom surface of the recess,
A stem having the valve body at one end,
An actuator for moving the stem along the flow direction of the fluid for opening and closing the flow path,
The actuator has a through hole penetrating in a direction coaxial or parallel to the stem at an end opposite to the valve body,
The stem forms a fluid inlet for introducing a fluid to the peripheral surface of the stem and / or the valve body in the recess, and forms an internal flow path connected to the fluid inlet inside the stem in the axial direction. The other end is in the through-hole, and an inflow / outflow pipe is disposed in the through-hole to separate the other end of the stem from the fluid and flow into and out of the actuator,
A valve, wherein a distance between opposed ends of the stem and the inflow / outflow pipe is longer than a movable distance of the stem.

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