JP2016161124A - Container valve, pressure detection jig, pressure detection unit, fluid filling jig and fluid filling unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a container valve, a pressure detection jig and a fluid filling jig capable of opening a valve at an inverse flow prevention mechanism provided at a filling port even if a pressure against a filling direction F acts on the inverse flow prevention mechanism.SOLUTION: A gas filling port 11 of a container valve 1 comprising a cylinder fixing part 13, a gas supply port 12, a flow passage 90 where gas G flows, a sheet assembly 54 for changing-over an opening or closing at an intermediate portion of the flow passage 90 and the gas filling port 11 is provided at a primary side flow passage 91 and at the same time the gas filling port 11 is provided with an inverse flow prevention mechanism 20 for preventing inverse flow of filled gas G. The inverse flow prevention mechanism 20 is constituted of a check valve body 22, a pilot valve body 23 and an inverse flow prevention spring 24, and a projected area of a downstream side Fd in a filling direction at the pilot valve body 23 is formed to be smaller than that of the check valve body 22.SELECTED DRAWING: Figure 5

Description

  The present invention relates to, for example, a container valve that is attached to a storage container such as a gas cylinder filled with gas, a pressure detection jig that detects the pressure of a fluid that is attached to the container valve, and a pressure detection unit. The present invention relates to a fluid filling jig and a fluid filling unit that are attached to and filled with fluid.

  In general, a so-called residual pressure holding valve mechanism or the like that allows a fluid such as gas to be conducted and can leave a gas at a predetermined pressure in a storage container in a container valve having an on-off valve that switches between an open state and a sealed state. Unlike the on-off valve, a conduction direction regulating valve mechanism that regulates the conduction direction of the fluid to be conducted may be provided (see Patent Document 1).

  However, for example, in a container valve provided with a conduction direction regulating valve mechanism or the like at an introduction outlet called an outlet, a complicated mechanism such as a mechanism for canceling the conduction direction regulating valve mechanism when the storage container is filled with gas from the outlet Therefore, there is a container valve having a filling port for filling the gas separately from the take-out port for taking out the gas.

  In a container valve having such a filling port, a check valve called a check valve for preventing a backflow of gas to be filled is provided in the filling port, and the backflow prevention valve is opened to fill the gas, so that a predetermined pressure can be obtained. Can be filled with gas. However, when the pressure of the filled gas is detected after the gas filling is completed or the storage container in which the filled gas remains is refilled with gas, the backflow prevention valve has a gas pressure on the storage container side. Therefore, in order to open the backflow prevention valve, it is necessary to apply a large force to open the valve and then to detect the pressure or refill the valve.

JP 2005-201404 A

  Therefore, the present invention provides a container valve that can open the backflow prevention mechanism even when a pressure against the filling direction is applied to the backflow prevention mechanism provided in the filling port, and is attached to the container valve for filling. An object of the present invention is to provide a pressure detection jig for detecting the pressure of the fluid, a pressure detection unit, and a fluid filling jig and a fluid filling unit that are attached to a container valve to fill the fluid.

The present invention includes a container mounting portion that is attached to a storage container, a fluid outlet that extracts a fluid, a fluid passage that communicates from the container mounting portion to the fluid outlet, and a passage through which the fluid passes. An opening / closing valve that switches between opening and closing at an intermediate portion, and a filling port that is connected to the flow path and fills the storage container with the fluid, and the flow path is connected to the opening / closing valve from the container mounting portion side end. A side valve and a container valve set in a secondary channel from the on-off valve to the fluid outlet, the filling port being disposed in the primary channel and filling the filling port A backflow prevention mechanism for preventing backflow of the fluid, the checkflow mechanism comprising: a check valve means; and a biasing means for biasing the check valve means in a valve closing direction opposite to the filling direction. And the check valve means is a main check valve; The auxiliary check valve moves in the filling direction with respect to the main check valve, and the projected area in the orthogonal direction perpendicular to the filling direction on the downstream side of the filling direction is greater than the auxiliary check valve than the main check valve. The check valve is small.
The fluid can be a gas, a liquid, or a gel.

According to the present invention, the backflow prevention mechanism provided at the filling port can be opened even when a pressure against the filling direction is applied.
Specifically, in the backflow prevention mechanism in which the pressure on the downstream side in the filling direction, that is, the pressure on the primary flow path communicating with the storage container is applied, a large pressure acts on the main check valve having a large projected area. In order to open the prevention mechanism, it is necessary to apply a large force to move in the filling direction, but the auxiliary check valve with a small projected area compared to the projected area in the orthogonal direction of the main check valve is small. It can be moved in the filling direction by force. Therefore, even when a pressure against the filling direction is applied, the backflow prevention mechanism provided at the filling port can be opened to refill or detect the pressure.

As an aspect of the present invention, the urging means can urge the auxiliary check valve, and the urging means can urge the main check valve via the auxiliary check valve.
According to the present invention, for example, as compared with the case where separate urging means for urging each of the main check valve and the auxiliary check valve are provided, the auxiliary check valve is assisted in the valve closing direction with a simple structure. While moving the check valve in an energized state, the main check valve can be energized in the valve closing direction.

Further, as an aspect of the present invention, a seal member is disposed at a contact portion of the auxiliary check valve and the main check valve in the filling direction, and further upstream of the seal member in the auxiliary check valve in the filling direction. A through shaft portion that penetrates the main check valve may be provided, and a fluid outlet groove that guides the fluid to the upstream side of the main check valve may be provided on the outer peripheral surface of the through shaft portion.
The sealing member may be a means having sealing properties and elasticity such as an O-ring, rubber packing, and metal packing.

According to the present invention, the durability of the backflow prevention mechanism having a high sealing property can be improved.
Specifically, a seal member is disposed at a contact portion of the auxiliary check valve and the main check valve in the filling direction, and the main check valve in the auxiliary check valve is disposed upstream of the seal member in the filling direction. By providing the through-shaft portion that penetrates the check valve, it is possible to achieve a seal in which the seal member is pressed in the filling direction so as to be in close contact with each other, and a backflow prevention mechanism with high sealing performance can be configured.

  On the other hand, the seal member pressed and brought into close contact with the filling direction vigorously conducts due to a high pressure difference immediately after the start of conduction when the auxiliary check valve moves in the filling direction with respect to the main check valve. The seal member may be damaged or detached when exposed to the fluid to be removed, but by providing a fluid outlet groove for leading the fluid to the upstream side of the main check valve on the outer peripheral surface of the through shaft portion. Since the fluid can be led to the upstream side of the main check valve through the fluid lead-out groove immediately after the auxiliary check valve starts moving, the momentum of the fluid at the start of conduction is suppressed, and the load acting on the seal member is reduced. The sealing member can be prevented from being damaged or detached. Therefore, the durability of the backflow prevention mechanism having a high sealing property can be improved.

As an aspect of the present invention, the upstream end of the through shaft portion can protrude upstream from the main check valve.
According to the present invention, the auxiliary check valve is disposed downstream of the main check valve by pressing the upstream end of the through shaft portion protruding upstream from the main check valve toward the downstream side. Can be moved to the side. Therefore, the auxiliary check valve can be moved downstream with respect to the main check valve with a simple structure.

As an aspect of the present invention, the fluid outlet can be provided with a pressure reducing mechanism for reducing the pressure of the fluid to be extracted.
According to the present invention, for example, even when the storage container is filled with a fluid at a high pressure, the fluid can be taken out from the fluid outlet by reducing the pressure to a predetermined pressure.

Further, the present invention is a pressure detection jig that is connected to the filling port of the container valve and detects the pressure of the filled fluid, a pressure detection jig mounting portion that is attached to the filling port, a pressure gauge, The pressure detection jig mounting part communicates from the pressure gauge to the pressure gauge and moves the auxiliary check valve in the filling direction relative to the main check valve and the flow path in the pressure detection jig through which the fluid passes. Or a pressure detection unit in which the container valve is connected to the pressure detection jig.
According to the present invention, even if the fluid is filled at a high pressure, the backflow prevention mechanism can be opened to directly detect the pressure of the fluid filled in the storage container.

  The present invention is also a fluid filling jig that is connected to the filling port of the container valve and fills the fluid, wherein the fluid supply device is connected to a filling jig mounting portion that is attached to the filling port. The auxiliary check valve is connected to the apparatus connection portion, the filling jig attachment portion to the fluid supply device connection portion, and the flow passage in the filling jig through which the fluid passes, and the main check valve. It is constituted by a moving operation means for a filling jig that moves in the filling direction, or is a fluid filling unit in which the container valve and the fluid filling jig are connected.

According to the present invention, the fluid can be filled at a required pressure.
In detail, when filling the fluid with the required pressure, if the backflow prevention mechanism is opened and filled with the fluid pressure, the backflow prevention mechanism with the pressure acting against the biasing force of the biasing means will be Although the pressure corresponding to the valve opening is reduced and filled, the auxiliary check valve can be moved by the moving operation means for the filling jig, so that the fluid can be filled at a required pressure. Therefore, even for a storage container where fluid remains at a high pressure, the backflow prevention mechanism can be opened to fill the fluid.

  As an aspect of the present invention, the filling jig moving operation means includes a first moving body that moves in the filling direction by a filling operation, and the auxiliary check valve that moves in the filling direction of the first moving body. And a urging means for charging disposed between the first moving body and the second moving body and urging in the filling direction. The means can be configured to have a biasing force that is smaller than the biasing force of the biasing means in a normal state and larger than the biasing force of the biasing means by a filling operation.

  According to the present invention, the backflow prevention mechanism can be opened at the time of fluid filling by the filling biasing means that is smaller than the biasing force of the biasing means in a normal state and becomes larger than the biasing force of the biasing means by the filling operation. The occurrence of surging due to repeated valve and valve closing can be prevented.

  According to the present invention, a container valve that can open the backflow prevention mechanism even when a pressure against the filling direction is applied to the backflow prevention mechanism provided in the filling port, and the container valve is mounted and filled. It is possible to provide a pressure detection jig and a pressure detection unit for detecting the pressure of a fluid, and a fluid filling jig and a fluid filling unit which are attached to a container valve and filled with a fluid.

Explanatory drawing of a container valve. The block diagram of a container valve. AA arrow sectional drawing of a container valve | bulb. BB arrow sectional drawing of a container valve | bulb. Explanatory drawing of a backflow prevention mechanism. Explanatory drawing of a backflow prevention valve part. Sectional drawing of the filling jig of a mounting state. Sectional drawing of the filling jig of a filling state. Explanatory drawing of a pressure detection jig.

A container valve 1 according to an embodiment of the present invention will be described with reference to FIGS.
1 shows an explanatory view of the container valve 1, FIG. 1 (a) shows a front perspective view of the container valve 1, and FIG. 1 (b) shows a rear perspective view of the container valve 1. 2 shows a schematic configuration diagram of the container valve 1, FIG. 3 shows a sectional view taken along the line AA of the container valve 1, and FIG. 4 shows a sectional view taken along the line BB of the container valve 1. 5 is an explanatory view of the backflow prevention mechanism 20, and FIG. 6 is an explanatory view of the backflow prevention valve portion 20A.

More specifically, FIG. 5 (a) shows a cross-sectional view taken along the line C-C through the backflow prevention mechanism 20, and FIGS. 5 (b) and 5 (c) show enlarged views of part a in FIG. 5 (a). FIG.5 (d) has shown the b section enlarged view in FIG. 5B shows a normal state, FIG. 5C shows a state immediately after the start of movement of the pilot valve 23, and FIG. 5D shows a valve open state.
6A shows a perspective view of the backflow prevention valve portion 20A in the assembled state, and FIG. 6B shows a perspective view of the backflow prevention valve portion 20A in the disassembled state.

  As shown in FIGS. 1 and 2, the container valve 1 is a packing-type container valve that is attached to the cylinder container B and regulates the conduction of the gas G for supplying and filling the gas G. A backflow prevention mechanism 20 attached to the filling port 11, a residual pressure holding mechanism 30, a pressure reduction mechanism 40, a closing valve mechanism 50 attached at the top of the body body 10, a pressure gauge 60, a container safety valve 70, a secondary side safety valve 80, And a flow path 90 formed inside the body body 10.

  Note that an O-ring is provided at an appropriate portion of the container valve 1 where each component and the body main body 10 are opposed to each other and each component is opposed to each other. However, the illustration and detailed description of the O-ring are appropriate. Omitted.

  The body body 10 has a vertically long and substantially cylindrical shape, and includes a closing valve mounting recess 19 for mounting the closing valve mechanism 50 on the upper part, and is a cylinder that is screwed into a mounting part (not shown) on the upper side of the cylinder container B. The attachment part 13 is provided in the lower part. In addition, a gas supply port 12 is provided on the front side of the body body 10 so as to protrude to the near side in the vicinity of the middle stage, and a gas filling port 11 and a residual pressure holding mechanism are provided on the back side to protrude to the back side. Part 14. The residual pressure holding mechanism mounting portion 14 is disposed at a position facing the gas supply port 12.

  On the side surface of the body main body 10, a pressure reducing mechanism mounting portion 15 and a secondary safety valve mounting portion 16 are provided in this order from the lower side on the front side in FIG. 1 (a), and on the front side in FIG. 1 (b). The container safety valve mechanism portion 17 and the pressure gauge mounting portion 18 are provided in this order from the lower side. Note that the container safety valve mechanism 17 and the pressure reducing mechanism mounting portion 15 are disposed at opposing positions.

A flow path 90 is provided inside the body body 10.
The shut-off valve mounting recess 19 includes a working chamber 19a that is a substantially cylindrical recess that is open at the top, and a shut-off valve chamber 19b that has a small diameter around the working chamber 19a. The upper end of the primary flow passage 91 communicates with the bottom surface of the shut-off valve chamber 19b, an upper end opening 91a is formed, and an opening valve seat 91b that protrudes upward along the outer edge of the upper end opening 91a is formed. Have

A flow path 90 is formed inside the body body 10 so as to pass through the closing valve chamber 19 b and communicate from the lower end of the cylinder mounting portion 13 to the tip of the gas supply port 12.
Note that, in the flow path 90, a primary flow path 91 that communicates between the lower end of the closing valve mounting recess 19 and the lower end of the cylinder mounting portion 13, and the second communication path that communicates from the lower end of the closing valve mounting recess 19 to the tip of the gas supply port 12. The secondary flow path 92 is used.

  The gas filling port 11 and the container safety valve mechanism 17 are connected to the primary flow path 91, and the secondary safety valve mounting part 16 and the pressure gauge mounting part 18 are connected to the secondary flow path 92. further. The decompression mechanism mounting portion 15 and the residual pressure holding mechanism mounting portion 14 are formed in the middle of the secondary flow path 92.

  The closing valve mechanism 50 to be mounted in the closing valve mounting recess 19 includes a rotary handle 51, a ground nut 52, a spindle 53, a seat assembly 54, and a closing member 55 mounted on the bottom surface of the seat assembly 54.

The rotary handle 51 is formed in a substantially circular cloud shape in plan view having a corrugated outer periphery projecting at a plurality of locations, and includes a fitting portion 51 a that allows fitting of a fitted portion 53 a on the upper portion of the spindle 53.
The gland nut 52 has a hollow, generally cylindrical shape that includes a head nut portion 52a and a male screw portion 52b that engages with a female screw formed on the inner surface of the working chamber 19a of the closing valve mounting recess 19.

  The spindle 53 is provided with a fitted portion 53a that fits into the fitting portion 51a of the rotary handle 51 at the top, and a fitting recess 53b that fits into the spindle fitting recess 54a of the seat assembly 54 at the bottom.

The seat assembly 54 has a substantially cylindrical shape, and includes a spindle fitting recess 54 a that allows fitting of the fitting recess 53 b of the spindle 53 at the upper end, and a closing member fitting recess 54 b that allows fitting of the closing member 55. Provided at the bottom.
The closing member 55 is an elastic member having a circular shape in a plan view that is fitted into the closing member fitting recess 54b of the seat assembly 54, and is configured so that the opening valve seat 91b can bite in the closed state.

  As described above, the closing valve mechanism 50 including the rotary handle 51, the ground nut 52, the spindle 53, the seat assembly 54, and the closing member 55 causes the closing member 55 to be fitted into the closing member fitting recess 54b of the seat assembly 54. At the same time, the fitting recess 53b of the spindle 53 is fitted into the spindle fitting recess 54a of the seat assembly 54, the ground nut 52 is attached to the spindle 53, and the male threaded portion 52b of the ground nut 52 and the closing valve mounting recess 19 are formed. It is screwed with a female screw and mounted in the stop valve mounting recess 19. Then, the fitting portion 51a of the rotary handle 51 is fitted into the fitted portion 53a of the spindle 53, and the assembly of the closing valve mechanism 50 is completed.

  The closing valve mechanism 50 configured as described above presses the seat assembly 54 downward via the spindle 53 by screwing the rotary handle 51 in the tightening direction. At this time, the opening valve seat 91 b formed around the upper end opening 91 a bites into the closing member 55 fitted in the closing member fitting recess 54 b of the seat assembly 54, and the upper end opening 91 a is sealed by the closing member 55. This state is referred to as a sealed state.

  Conversely, when the rotary handle 51 is rotated in the loosening direction and the spindle 53 is screwed out, the seat assembly 54 moves upward via the spindle 53, so the upper end opening 91a is opened, and the primary side flow path 91, The shut-off valve chamber 19b and the secondary side flow path 92 communicate with each other, and the flow path 90 becomes conductive. This state is referred to as an open state.

Next, the gas supply port 12 and the supply port internal channel 122 formed in the gas supply port 12 and constituting a part of the secondary channel 92 of the channel 90 will be described with reference to FIG.
The gas supply port 12 is a substantially horizontal columnar shape having a connection allowing portion 121 that allows connection of an instrument that uses a gas G (not shown), and has a supply port flow passage 122 penetrating in the axial direction. Yes.

The residual pressure holding mechanism 30 is disposed in the supply-port flow path 122.
Since the residual pressure holding mechanism 30 is a known residual pressure holding mechanism, a detailed description thereof is omitted. However, the residual pressure holding mechanism 30 includes a residual pressure holding valve body 31, a residual pressure holding spring 32, and a residual pressure holding valve box 33. The residual pressure holding valve box 33 fixed to the gas supply port 12 is used as a reaction force, the residual pressure holding spring 32 urges the residual pressure holding valve body 31 in the supply direction S, and the pressure of the gas G to be supplied is increased. When the pressure is equal to or lower than the predetermined pressure, the residual pressure holding valve body 31 is sealed, and the supply of the gas G can be stopped while the predetermined residual pressure is maintained in the cylinder container B.

The secondary-side safety valve mounting portion 16 is formed with a safety valve mounting space 161 that communicates with the secondary-side flow path 92 and mounts the secondary-side safety valve 80, and the secondary-side safety valve 80 is mounted in the safety valve mounting space 161. Yes.
Since the secondary safety valve 80 is a known safety valve, a detailed description thereof is omitted, but the safety valve box 81 fixed in the safety valve mounting space 161 of the secondary safety valve mounting portion 16 and the safety valve box 81 are fixed. The safety valve lid 82, the safety valve spring 83, the safety valve main body 84, and the sealing cap 85 are configured.

  The secondary-side safety valve 80 is driven by the safety valve spring 83 toward the secondary-side flow path 92 by using the safety valve lid 82 fixed to the secondary-side safety valve mounting portion 16 via the safety valve box 81 as a reaction force. When the pressure of the gas G in the secondary flow path 92 exceeds a predetermined pressure corresponding to the biasing force of the safety valve spring 83, the safety valve body 84 moves in the valve opening direction, and the gas G that is equal to or higher than the predetermined pressure. It is a safety valve that discharges.

  A decompression mechanism mounting space 151 for mounting the decompression mechanism 40 is formed in the decompression mechanism mounting unit 15, and the decompression mechanism 40 is mounted in the decompression mechanism mounting space 151. Since the decompression mechanism mounting space 151 is formed in the middle of the secondary side flow path 92, the gas G passing through the secondary side flow path 92 passes through the decompression mechanism 40 mounted in the decompression mechanism mounting space 151. Then, the gas is supplied from the gas supply port 12.

  Since the decompression mechanism 40 is a known decompression mechanism, a detailed description thereof is omitted. However, the decompression valve box 41 fixed to the decompression mechanism mounting space 151 of the decompression mechanism mounting unit 15 and the decompression valve box 41 are fixed. The pressure reducing valve lid body 42, the pressure reducing valve spring 43, and the pressure reducing valve main body 44 are configured.

  The decompression mechanism 40 is energized by energizing the decompression valve main body 44 in a direction away from the secondary flow path 92 by using the decompression valve box 41 fixed to the decompression mechanism mounting portion 15 as a reaction force. This is a decompression mechanism that decompresses the gas G to a predetermined pressure.

  A pressure gauge mounting space 181 for mounting the pressure gauge 60 is formed in the pressure gauge mounting portion 18, and the pressure gauge 60 is mounted in the pressure gauge mounting space 181. Since the pressure gauge mounting space 181 is connected to the secondary flow path 92 upstream from the decompression mechanism mounting space 151, the pressure gauge 60 detects the pressure of the gas G passing through the secondary flow path 92. Can do. In addition, since the pressure gauge 60 is a well-known pressure gauge, detailed description is abbreviate | omitted.

  The container safety valve mechanism portion 17 is formed with a safety valve mounting space 171 that is connected to the primary flow path 91 via a backflow prevention mechanism mounting space 111 described later, and in which the container safety valve 70 is mounted, and the container safety valve 70 is provided in the safety valve mounting space 171. Wearing.

  Since the container safety valve 70 is a known fusing-type safety valve, a detailed description thereof is omitted, but the valve body 71 fixed to the safety valve mounting space 171 of the container safety valve mechanism 17 and the valve body 71 are penetrated. The filler plug 72 is filled with a safety plate 73. The plug valve 72 is made of a phase metal that melts at a predetermined temperature, and the safety plate 73 is a plate material that deforms at a predetermined pressure, and seals the secondary flow path 92 side of the plug valve 72.

  When the gas G that is conducted through the primary side flow path 91, that is, the gas G in the cylinder container B exceeds a predetermined temperature or a predetermined pressure, the safety plate 73 may be deformed, 72 is a safety valve which can melt | dissolve and can discharge | release gas G outside.

As shown in FIG. 5, the gas filling port 11 is formed with a backflow prevention mechanism mounting space 111 penetrating in a direction intersecting the primary flow path 91, and the backflow prevention mechanism mounting space 111 is mounted with the backflow prevention mechanism 20. ing.
Specifically, the backflow prevention mechanism mounting space 111 includes a connection space 111a for mounting a stop plug (not shown) when not in use, a mechanism mounting space 111b for mounting the backflow prevention mechanism 20, a connection space 111a, and a mechanism mounting space 111b. And a reduced diameter space 111c into which a distal end portion of a check valve body 22 described later is inserted, and a space therethrough is formed.

  As shown in FIGS. 5 and 6, the backflow prevention mechanism 20 is inserted into the mechanism mounting space 111 b and fixed, a backflow prevention valve box 21, a check valve body 22, a pilot valve body 23, a backflow prevention spring 24, It consists of.

  In FIG. 5, the direction from the right side to the left side is the filling direction F, the right side is the filling direction upstream Fu, and the left side is the filling direction downstream Fd. The check valve body 22 and the pilot valve body 23 constitute a backflow prevention valve portion 20A. Further, in FIG. 6, the front side is the upstream side Fu in the filling direction and the back side is the downstream side Fd in the filling direction, and the front side of the check valve body 22 and the pilot valve body 23 is easy to understand the internal structure. Although a part is notched and illustrated, the through shaft portion 231 is illustrated without being cut out.

  The backflow prevention valve box 21 has a substantially cylindrical shape with a bottom, and has a columnar insertion space 21a into which other elements are inserted, and an inner surface constituting a mechanism mounting space 111b with threads formed on the outer peripheral surface. It is fixed by screwing with the thread groove. A mounting recess 211 for mounting a rear end portion of a backflow prevention spring 24 to be described later is formed in a portion that becomes the bottom of the insertion space 21a.

  As shown in FIG. 6 (b), the check valve body 22 includes a tip diameter-reduced portion 221 on the upstream side Fu in the filling direction and a cylindrical body portion 222 having a cylindrical shape. The cylindrical main body 222 has an insertion space 222a that allows insertion of a cylindrical tube portion 232 of a pilot valve body 23, which will be described later, and a pilot valve body 23, which will be described later, is provided inside the tip reduced diameter portion 221. The through-shaft portion 231 has an insertion space 221a through which the check valve body 22 penetrates in the axial direction, that is, the filling direction F, with the insertion space 221a and the insertion space 222a.

  In addition, a mounting groove 223 in which the O-ring 25 is mounted is provided on the outer periphery of the tip reduced diameter portion 221 and the cylindrical main body portion 222. The O-ring 25 mounted in the mounting groove 223 forms an inner surface constituting the insertion space 21a and a mechanism mounting space 111b in the backflow prevention valve portion 20A in a state where the check valve body 22 is mounted in the insertion space 21a. The inner surface to be contacted in the radial direction is sealed.

  The pilot valve body 23 includes a through shaft portion 231 on the upstream side Fu in the filling direction and a cylindrical tube portion 232 on the downstream side Fd in the filling direction. The through-shaft portion 231 is a cylindrical shaft member that is inserted into the insertion space 221a of the above-mentioned tip diameter-reduced portion 221 and has a partly reduced tip diameter, and has a helical gas outlet groove on the outer peripheral surface. 233 is formed.

  The cylindrical tube portion 232 has a cylindrical shape with a diameter to be inserted into the insertion space 222a, and has an insertion space 232a in which the downstream side Fd in the filling direction is opened and the upstream side Fu in the filling direction of the backflow prevention spring 24 is inserted. doing. Also, the upstream side Fu in the filling direction of the cylindrical tube portion 232 has an insertion groove 234 in which the outer periphery extends to the upstream side Fu in the filling direction, and the O-ring 25 is fitted from the upstream side Fu in the filling direction.

The penetrating shaft portion 231 is formed such that the length in the filling direction upstream Fu from the insertion groove 234 is longer than the insertion space 221a, and the gas outlet groove 233 is formed in the filling direction upstream Fu from the insertion groove 234. ing.
The O-ring 25 mounted in the insertion groove 234 contacts the wall surface 222b on the upstream side Fu in the filling direction forming the insertion space 222a and seals in the axial direction (filling direction F).

  Further, in the check valve body 22 in which the cylindrical tube portion 232 is inserted into the insertion space 222a in the backflow prevention valve portion 20A and the pilot valve body 23, the projected area projected onto the orthogonal plane orthogonal to the filling direction F is the check valve. The pilot valve body 23 is smaller than the body 22.

  The backflow prevention spring 24 is mounted on the mounting recess 211 of the backflow prevention valve box 21 at the end in the filling direction downstream Fd, and the insertion space 232a of the pilot valve body 23 is mounted at the end in the filling direction upstream Fu. In the backflow prevention valve portion 20A, the backflow prevention valve box 21 disposed between the backflow prevention valve box 21 and the pilot valve body 23 and fixed to the mechanism mounting space 111b is used as a reaction force, and the pilot valve body 23 is placed upstream in the filling direction. It is energized to the side Fu.

  The backflow prevention mechanism 20 configured as described above has a pilot in which the through-shaft portion 231 is inserted into the insertion space 221a, the cylindrical tube portion 232 is inserted into the insertion space 222a, and the O-ring 25 is attached to the insertion groove 234. The valve body 23 and the check valve body 22 are assembled to constitute the backflow prevention valve portion 20A. Then, the end portion of the upstream side Fu in the filling direction is inserted into the insertion space 232a, and the end portion of the downstream side Fd in the filling direction is inserted into the mounting recess 211, so that the backflow prevention spring 24 is connected to the pilot valve body 23 and the backflow prevention valve box. 21 and is mounted in the mechanism mounting space 111b in a manner of being sandwiched between the two.

  In this state, the backflow prevention spring 24 urges the pilot valve body 23 to the upstream side Fu in the filling direction by using the backflow prevention valve box 21 fixed in the mechanism mounting space 111b as a reaction force. It is pressed against the check valve body 22 on the upstream side Fu in the filling direction. The check valve body 22 in which the pilot valve body 23 is pressed against the upstream side Fu in the filling direction is pressed against the upstream side Fu in the filling direction by the urging force of the backflow prevention spring 24 via the pilot valve body 23, and the tip diameter-reduced portion 221 is It will be in the state inserted in the reduced diameter space 111c.

  At this time, the end portion on the upstream side Fu in the filling direction of the penetrating shaft portion 231 inserted through the insertion space 221a protrudes from the tip reduced diameter portion 221 to the upstream side Fu in the filling direction in the reduced diameter space 111c, and the insertion groove 234 is inserted. The end portion of the gas outlet groove 233 formed on the upstream side Fu in the filling direction from the O-ring 25 attached to the upper side in the filling direction is also exposed to the upstream side Fu in the filling direction from the reduced diameter portion 221. Further, the O-ring 25 attached to the insertion groove 234 is pressed against the cylindrical main body 222b of the check valve body 22 and sealed in the axial direction, that is, the filling direction F.

As described above, the backflow prevention mechanism 20 is assembled to the gas filling port 11, and the residual pressure holding mechanism 30, the pressure reducing mechanism 40, the closing valve mechanism 50, the pressure gauge 60, the container safety valve 70, and the secondary side configured as described above. The container valve 1 assembled with the safety valve 80 is attached to the cylinder container B by screwing the cylinder mounting portion 13, and the primary flow path 91 communicating with the inside of the cylinder container B operates the rotary handle 51 of the closing valve mechanism 50. By switching by the open / close switching operation, the gas G that is in communication with the secondary side flow path 92 and filled in the cylinder container B in the valve open state passes through the flow path 90 and is disposed in the secondary side flow path 92. The pressure reducing mechanism 40 is depressurized, and the residual pressure holding valve body 31 is moved in the valve opening direction against the urging force of the residual pressure holding spring 32 to open the residual pressure holding mechanism 30. More It can be released by pressure.
Therefore, the gas G having a predetermined pressure can be supplied to the instrument connected to the gas supply port 12.

  Further, in the gas supply state in which the gas G is released from the gas supply port 12, when the pressure of the gas G inside the cylinder container B decreases to a predetermined pressure due to the discharge, the residual pressure holding mechanism 30 that has been opened opens the residual pressure. Since the residual pressure holding valve main body 31 moves in the valve closing direction by the urging force of the holding spring 32 and closes, the cylinder container B can be held at a predetermined residual pressure.

  Furthermore, in the opened container valve 1, the pressure inside the cylinder container B is controlled by the pressure gauge 60 installed in the pressure gauge installation space 181 connected to the upstream side of the decompression mechanism 40 in the secondary side flow path 92. It can be detected roughly.

  Further, when the pressure of the gas G to be released becomes excessive in the opened container valve 1, the safety valve body 84 moves in the valve opening direction against the biasing force of the safety valve spring 83 to open the secondary safety valve 80. It is possible to prevent the excessive pressure G from being supplied to the appliance that uses the gas G connected to the connection permitting portion 121 by discharging the excessive pressure gas G.

  Even if the container valve 1 is in an open state, conversely, even if it is a container valve 1 in a closed state that is closed by a valve closing operation that rotates the rotary handle 51 in the tightening direction, 91 or the gas G in the cylinder container B is equal to or higher than a predetermined temperature and / or a predetermined pressure, the container safety valve 70 is actuated to release the gas G in the primary channel 91 and Can be prevented from exceeding a predetermined temperature and / or a predetermined pressure.

  Thus, the cylinder attachment part 13 attached to the cylinder container B, the gas supply port 12 for taking out the gas G, and the flow path 90 through which the gas G passes while communicating from the cylinder attachment part 13 to the gas supply port 12. And a sheet assembly 54 that switches between opening and closing at an intermediate portion of the flow path 90 and a gas filling port 11 that is connected to the flow path 90 and fills the gas cylinder B with the gas G. The flow path 90 is connected to the cylinder mounting portion 13. The primary side flow path 91 from the side end portion to the seat assembly 54 and the gas filling port 11 of the container valve 1 set in the secondary side flow path 92 from the seat assembly 54 to the gas supply port 12 are used as the primary side flow path 91. In addition, the gas filling port 11 includes a backflow prevention mechanism 20 that prevents backflow of the gas G to be filled, and the backflow prevention mechanism 20 is connected to the backflow prevention valve portion 20A. The check valve portion 20A is composed of a backflow prevention spring 24 that biases the valve closing direction opposite to the filling direction F, and the check valve portion 20A is filled with respect to the check valve body 22 and the check valve body 22. This is a case where the pilot valve body 23 is moved in the direction F, and the projected area on the downstream side Fd in the filling direction is smaller than the check valve body 22, so that a pressure against the filling direction F is applied. However, the backflow prevention mechanism 20 provided in the gas filling port 11 can be opened.

  More specifically, the check valve body 22 having a large projected area is applied to the backflow prevention mechanism 20 in which the pressure on the downstream side Fd in the filling direction from the backflow prevention mechanism 20, that is, the pressure on the primary flow path 91 side communicating with the cylinder container B is applied. Therefore, in order to open the backflow prevention mechanism 20, it is necessary to apply a large force to move the check valve body 22 in the filling direction F, but the projected area is the check valve body 22. The smaller pilot valve body 23 can be moved in the filling direction F with a small force. Therefore, even when a pressure against the filling direction F acts, the backflow prevention mechanism 20 provided in the gas filling port 11 can be opened and refilled or the pressure can be detected.

  Further, the backflow prevention spring 24 biases the pilot valve body 23, and the backflow prevention spring 24 biases the check valve body 22 via the pilot valve body 23. For example, the check valve body 22 and the pilot valve body 23 The pilot valve body 23 is moved in the valve closing direction with respect to the check valve body 22 in a valve closing direction with a simple structure as compared with the case where separate backflow prevention springs 24 for biasing each of the check valve are provided. The body 22 can be urged in the valve closing direction.

  Further, an O-ring 25 is disposed at a contact portion in the filling direction F between the pilot valve body 23 and the check valve body 22, and the check valve body 22 is disposed upstream of the O-ring 25 in the pilot valve body 23 in the filling direction. Since the through-shaft portion 231 that penetrates and the gas outlet groove 233 for leading the gas G to the upstream side of the check valve body 22 can be provided on the outer peripheral surface of the through-shaft portion 231, a backflow prevention mechanism with high sealing performance The durability of 20 can be improved.

  More specifically, an O-ring 25 is arranged at the contact portion in the filling direction F between the pilot valve body 23 and the check valve body 22, and the check valve body is located upstream of the O-ring 25 in the pilot valve body 23 in the filling direction Fu. By providing the through-shaft portion 231 penetrating 22, a seal in which the O-ring 25 is pressed against and in close contact with the filling direction F can be formed, and the backflow prevention mechanism 20 with high sealing performance can be configured. In the above description, the O-ring 25 is attached to the insertion groove 234 formed in the pilot valve body 23, but may be attached to the O-ring 25.

  On the other hand, when the O-ring 25 is pressed against and brought into close contact with the filling direction F, the pilot valve body 23 moves in the filling direction F with respect to the check valve body 22, and from the filling direction downstream side Fd to the filling direction upstream side Fu. Immediately after the start of conduction when the gas G is conducted, the gas G is exposed to the gas G that is vigorously conducted due to a high pressure difference, and the O-ring 25 may be damaged or detached. However, by providing the gas outlet groove 233 that guides the gas G from the check valve body 22 to the upstream side Fu in the filling direction on the outer peripheral surface of the through-shaft portion 231, the gas outlet groove 233 is formed immediately after the pilot valve body 23 starts moving. Since the gas G can be led out from the check valve body 22 to the upstream side Fu in the filling direction, the momentum of the gas G at the start of conduction is suppressed, the load acting on the O-ring 25 is reduced, and the O-ring 25 is damaged. , Can be prevented from coming off. Therefore, the durability of the backflow prevention mechanism 20 with high sealing performance can be improved.

  Further, since the tip end portion of the penetrating shaft portion 231 protrudes from the check valve body 22 to the upstream side Fu in the filling direction, the tip end portion of the penetrating shaft portion 231 that protrudes from the check valve body 22 to the upstream side Fu in the filling direction is downstream in the filling direction. By pressing toward Fd, the pilot valve body 23 can be moved to the downstream side Fd in the filling direction with respect to the check valve body 22. Therefore, the pilot valve body 23 can be moved to the downstream side Fd in the filling direction with respect to the check valve body 22 with a simple structure.

  Further, since the secondary side flow path 92 up to the gas supply port 12 is provided with the pressure reducing mechanism 40 for reducing the pressure of the gas G to be taken out, for example, even when the cylinder G is filled with the gas G at a high pressure The gas G can be supplied from the supply port 12 by reducing the pressure to a predetermined pressure.

  In this way, the case where the gas G is filled into the cylinder container B equipped with the container valve 1 that can safely discharge the gas G filled in the cylinder container B from the gas supply port 12 will be described with reference to FIGS. explain. 7 shows a cross-sectional view of the filling unit 300A in which the fluid filling jig 300 is attached to the gas filling port 11, that is, the filling unit 300A in which the backflow prevention mechanism 20 is closed, and FIG. A sectional view of the filling unit 300A in which the fluid filling jig 300 is mounted, that is, the backflow prevention mechanism 20 is in a valve open state is shown.

  The fluid filling jig 300 includes a mounting cylinder part 310 attached to the gas filling port 11, a branch part 320, a handle support part 330, a handle 340, a joint part 350, a safety connection part 360, and a valve opening mechanism 370. The mounting cylinder part 310, the branch part 320, the handle support part 330, and the handle 340 are arranged in this order, and the joint part 350 and the safety connection part 360 branched by the branch part 320 are arranged in this order. It forms a letter shape.

  The mounting cylinder portion 310 has a cylindrical shape having an insertion space 311 that allows the valve opening mechanism 370 to be inserted therein, and has a connection portion 312 that is screwed to the gas filling port 11 on the downstream side Fd in the filling direction. Yes. 7 and 8, the left side is the filling direction downstream side Fd, the right side is the filling direction upstream side Fu, and the left-right direction is the axial direction.

  The branch portion 320 allows the valve opening mechanism 370 to be inserted therein, and has an internal space 321 branched in a direction orthogonal to the axial direction. A screw connection portion of a joint portion 350 described later is provided on the branch side. A screw connection portion 322 that allows screw connection of 351 is provided.

The handle support 330 has an internal space 331 in which a handle 340 described later is disposed on the upstream side Fu in the filling direction and allows the valve opening mechanism 370 to be inserted therein.
The handle 340 is connected to a slide shaft portion 374 of a valve opening mechanism 370 described later, and as shown in FIG. 8, the slide shaft portion 374 is moved to the downstream side Fd in the filling direction by pivoting from the initial state of FIG. It is an operation unit to be slid.

The joint part 350 is a joint part that connects the branch part 320 and a safety connection part 360, which will be described later, in communication with each other. The joint part 350 has screw connection parts 351 at both ends, and has a through channel 352 that penetrates both ends. Yes.
The safety connection portion 360 includes a device connection portion 361 that allows connection of a filling device (not shown), a screw connection portion 362 that is screwed to the screw connection portion 351 of the joint portion 350, and a safety valve disposed therebetween. 363.

  The valve opening mechanism 370 includes a push rod 371 for pushing the check valve body 22 and the pilot valve body 23 of the backflow prevention mechanism 20 in the filling direction FS from the downstream side Fd in the filling direction, and a filling treatment for pushing the push rod 371 to the gas filling port 11 side. The tool spring 372, the push rod 373, and the slide shaft portion 374 are configured.

  The push rod 371 has a rod shape having a flange portion 371a having an enlarged diameter in an intermediate portion in the axial direction, and the push rod 373 has a rod shape having a filling direction downstream enlarged portion 373a having an enlarged diameter on the downstream side Fd in the filling direction. It is.

The filling jig spring 372 is constituted by a coil spring that is fitted to the outside of the push rod 371 on the upstream side Fu in the filling direction from the flange portion 371a.
The slide shaft portion 374 can be rided in the axial direction by the handle 340, and has an insertion recess 374a that allows insertion of an end portion on the upstream side Fu in the filling direction of the push rod 373.

In the fluid filling jig 300 configured in this way, the mounting cylinder part 310, the branch part 320, the handle support part 330, and the handle 340 are arranged and connected along the axial direction, and the threaded cover of the branch part 320 is screwed. The joint part 350 to which the safety connection part 360 is connected is connected to the connection part 322.
At this time, the insertion space 311 of the mounting cylinder part 310, the internal space 321 of the branch part 320, and the internal space 331 of the handle support part 330 constitute an internal space N that communicates in the axial direction.

  In this internal space N, the push rod 371, the filling jig spring 372, the push rod 373, and the slide shaft portion 374 are arranged coaxially in the axial direction. At this time, the filling jig spring 372 disposed between the flange portion 371a of the push rod 371 and the diameter-enlarged downstream portion 373a in the filling direction of the push rod 373 is in a state in which an excessive load is not applied due to its natural length.

  The urging force of the natural length filling jig spring 372 is smaller than the urging force of the backflow prevention spring 24 of the backflow prevention mechanism 20 attached to the gas filling port 11. Further, in the assembled state, the filling jig spring 372 may be assembled in a slightly contracted state rather than a natural length as long as the biasing force of the backflow preventing spring 24 of the backflow preventing mechanism 20 attached to the gas filling port 11 is smaller. .

A case will be described in which the fluid filling jig 300 configured as described above is connected to the gas filling port 11 to constitute the filling unit 300A, and the gas G is filled with the configured filling unit 300A.
First, the connecting portion 312 of the fluid filling jig 300 is connected to the gas filling port 11, and the filling device is connected to the safety connecting portion 360. In this state, the internal space N is in a sealed state.

  Then, the rotary handle 51 of the closing valve mechanism 50 is operated to open the valve. However, the internal space N is in a state of being blocked by the closed-flow backflow prevention mechanism 20 attached to the gas filling port 11.

  Here, as shown in FIG. 8, by opening the handle 340, the slide shaft portion 374 is moved to the downstream side Fd in the filling direction, and the slide shaft portion 374 moved to the downstream side Fd in the filling direction is the insertion recess. The push rod 373 is pressed against the downstream side Fd in the filling direction while inserting the end of the upstream side Fu in the filling direction 374a.

  The push rod 373 pressed against the downstream side Fd in the filling direction by the slide shaft portion 374 moves to the downstream side Fd in the filling direction while pressing the spring 372 for filling jig against the downstream side Fd in the filling direction. The filling jig spring 372 moves the push rod 371 to the downstream side Fd in the filling direction via the flange portion 371a using the downstream diameter-enlarged portion 373a of the push rod 373 moved to the downstream side Fd in the filling direction as a reaction force.

  As shown in FIG. 5B, the end of the push rod 371 moved to the downstream side Fd in the filling direction is the tip of the penetrating shaft portion 231 of the pilot valve body 23 protruding from the check valve body 22. And press in the filling direction F. The pilot valve body 23 pressed against the downstream side Fd in the filling direction by the push rod 371 moves to the downstream side Fd in the filling direction with respect to the check valve body 22, and further movement of the downstream side Fd in the filling direction of the push rod 371 causes The end of the push rod 371 on the downstream side Fd in the filling direction is pressed not only in the pilot valve body 23 but also in the filling direction F together with the check valve body 22, and the check valve body 22 and the pilot valve body 23 are pressed against the backflow prevention valve box 21. On the other hand, it is moved to the downstream side Fd in the filling direction, the tip diameter reducing portion 221 is moved from the reduced diameter space 111c to the downstream side Fd in the filling direction, and the backflow prevention mechanism 20 is opened.

  When the gas G is supplied from the filling device connected to the safety connection portion 360 in the valve open state of the backflow prevention mechanism 20, the gas G can be filled into the cylinder container B through the primary side flow path 91. it can.

  When the filling of the gas G is completed, the push rod 371 of the valve opening mechanism 370 moves to the upstream side Fu in the filling direction by returning the handle 340 to the initial state shown in FIG. 23 is moved to the upstream side Fu in the filling direction by the backflow prevention spring 24, the tip diameter-reduced portion 221 of the check valve body 22 is inserted into the diameter-reduced space 111c, the valve is closed, and the filled gas G is filled with the gas filling port. 11 can be prevented from being released.

  Thus, the connection part 312 which connects with the gas filling port 11 of the above-mentioned container valve 1 and fills the gas G with the fluid filling jig 300 for filling the gas G, and the equipment connection part to which the filling device is connected. 361 and a valve opening mechanism that communicates from the connecting portion 312 to the device connecting portion 361 and moves the pilot valve body 23 to the downstream Fd in the filling direction with respect to the internal space N through which the gas G passes and the check valve body 22. 370, the gas G can be filled at a required pressure.

  More specifically, when filling the gas G with a required pressure, if the valve G is opened and filled with the pressure of the gas G, the pressure acts against the urging force of the backflow prevention spring 24. Although the pressure corresponding to the opening of the backflow prevention mechanism 20 is reduced and filled, the pilot valve body 23 can be moved and filled by the valve opening mechanism 370, so that the gas G can be filled at a required pressure. Therefore, the gas flow G can be filled by opening the backflow prevention mechanism 20 even for the cylinder B where the gas G remains at a high pressure.

  The valve opening mechanism 370 includes a push rod 373 that moves to the downstream side Fd in the filling direction by a filling operation, and a push rod that pushes the pilot valve body 23 in the filling direction F by the movement of the push rod 373 in the filling direction F. 371 and a filling jig spring 372 disposed between the push rod 373 and the push rod 371 and biasing in the filling direction F, and the filling jig spring 372 is connected to the backflow prevention spring 24 in a normal state. By configuring so that the biasing force is smaller than the biasing force and larger than the biasing force of the backflow prevention spring 24 by the filling operation, the biasing force of the backflow prevention spring 24 is smaller than the biasing force of the backflow prevention spring 24 in the normal state. Opening and closing of the backflow prevention mechanism 20 when the gas G is filled by the filling jig spring 372 that has a biasing force larger than the force. It is possible to prevent the occurrence of surging due to the repeated.

  Next, the case where the pressure is detected using the pressure detection jig 400 that detects the pressure of the gas G filled using the fluid filling jig 300 as described above will be described with reference to FIG. FIG. 9 is an explanatory view of the pressure detection jig 400. Specifically, FIG. 9A shows that the detection unit 400A in which the pressure detection jig 400 is mounted on the gas filling port 11, that is, the backflow prevention mechanism 20 is closed. 9B is a sectional view of the detection unit 400A in the state, and FIG. 9B is a detection unit using the pressure detection jig 400 attached to the gas filling port 11, that is, the detection unit in which the backflow prevention mechanism 20 is in the valve open state. A cross-sectional view of 400A is shown.

  The pressure detection jig 400 includes a mounting cylinder part 410 attached to the gas filling port 11, a branch part 420, a handle 430, a blow valve 440, and a push rod 450, and the mounting cylinder part 410, the branch part 420, and the handle 430. , And the push rod 450 are arranged in this order, and the blow valve 440 branched by the branch portion 420 forms a substantially T-shape as a whole.

  The mounting cylinder portion 410 has a cylindrical shape having an insertion space 411 that allows the push rod 450 to be inserted therein, and has a connection portion 412 that is screwed and connected to the gas filling port 11 on the downstream side Fd in the filling direction. . In FIG. 9, the left side is the filling direction downstream side Fd, the right side is the filling direction upstream side Fu, and the left-right direction is the axial direction.

  The branch portion 420 allows the push rod 450 to be inserted therein, and has an internal space 421 branched in a direction orthogonal to the axial direction, and a screw connection portion 441 of a blow valve 440 described later on the branch side. A screwed connection portion 422 that permits screwing connection, and a mounted portion 423 for mounting a pressure gauge (not shown).

The handle 430 is an operation unit that slides a push rod 450 to be described later in the axial direction by a rotation operation.
The blow valve 440 is a blow valve of a known mechanism having a screw connection portion 441 that is screwed and connected to the screw connection portion 422.

In the pressure detection jig 400 configured in this way, the mounting cylinder portion 410, the branch portion 420, and the handle 430 are arranged and connected along the axial direction, and blown to the threaded connection portion 422 of the branch portion 420. A valve 440 is connected, and a pressure gauge (not shown) is connected to the mounted portion 423.
At this time, the insertion space 411 of the mounting cylinder portion 410 and the internal space 421 of the branching portion 420 communicate with each other in the axial direction to form the internal space N1, and the push rod 450 is disposed therein.

A case will be described in which the pressure detection jig 400 configured as described above is connected to the gas filling port 11 to configure the detection unit 400A, and the pressure of the gas G charged by the configured detection unit 400A is detected.
First, the connection part 412 of the pressure detection jig 400 is connected to the gas filling port 11 to constitute the detection unit 400A, and the rotary handle 51 of the closing valve mechanism 50 is operated to open the valve. However, the insertion spaces 411 and 421 are in a state of being blocked by the backflow prevention mechanism 20 in the closed state attached to the gas filling port 11.

  Here, as shown in FIG. 9B, by opening the handle 430, the push rod 450 moves to the downstream side Fd in the filling direction and the filling direction of the push rod 450 moved to the downstream side Fd in the filling direction. As shown in FIG. 5B, the end of the downstream side Fd abuts on the tip of the penetrating shaft portion 231 of the pilot valve body 23 protruding from the check valve body 22, and presses it against the downstream side Fd in the filling direction. The pilot valve body 23 pressed against the downstream side Fd in the filling direction by the push rod 450 moves to the downstream side Fd in the filling direction with respect to the check valve body 22, and further movement of the downstream side Fd in the filling direction of the push rod 450 causes The end of the push rod 450 on the downstream side Fd in the filling direction presses not only the pilot valve body 23 but also the check valve body 22 together with the downstream Fd in the filling direction, and the check valve body 22 and the pilot valve body 23 are backflow-prevented valve box. 21 to the downstream side Fd in the filling direction, the tip diameter-reducing portion 221 moves from the reduced diameter space 111c to the downstream side Fd in the filling direction, and the backflow prevention mechanism 20 opens.

In the open state of the backflow prevention mechanism 20, the pressure of the filled gas G can be detected by a pressure gauge connected to the mounted portion 423.
More specifically, a connection part 412 for connecting a pressure detecting jig 400 connected to the gas filling port 11 of the container valve 1 and detecting the pressure of the filled gas G to the gas filling port 11, a pressure gauge, By composing from the connecting portion 412 to the pressure gauge, the internal space N1 through which the gas G passes and the push rod 450 that moves the pilot valve body 23 in the filling direction F with respect to the check valve body 22, Even when the gas G is filled at a high pressure, the pressure of the gas G filled in the cylinder container B can be directly detected by opening the backflow prevention mechanism 20.

In the correspondence between the configuration of the present invention and the above-described embodiment, the storage container of the present invention corresponds to the cylinder container B,
Similarly,
The container mounting part corresponds to the cylinder mounting part 13,
The fluid outlet corresponds to the gas supply port 12,
The fluid corresponds to gas G,
The on-off valve corresponds to the seat assembly 54,
The filling port corresponds to the gas filling port 11,
The check valve means corresponds to the check valve portion 20A,
The biasing means corresponds to the backflow prevention spring 24,
The main check valve corresponds to the check valve body 22,
The auxiliary check valve corresponds to the pilot valve body 23,
The seal member corresponds to the O-ring 25,
The fluid outlet groove corresponds to the gas outlet groove 233,
The pressure detection jig corresponds to the pressure detection jig 400,
The pressure detection jig mounting part corresponds to the connection part 412,
The flow path in the pressure detection jig corresponds to the internal space N1,
The pressure detecting jig moving operation means corresponds to the push rod 450,
The filling jig mounting portion corresponds to the connection portion 312,
The fluid supply device is compatible with filling equipment,
The fluid supply device connection portion corresponds to the device connection portion 361,
The flow path in the filling jig corresponds to the internal space N,
The movement operation means for the filling jig corresponds to the valve opening mechanism 370,
The first moving body corresponds to the push rod 373,
The second moving body corresponds to the push rod 371,
The urging means for filling corresponds to the spring 372 for filling jig,
The present invention is not limited only to the configuration of the above-described embodiment, and many embodiments can be obtained.

For example, in the above description, the gas is described as the fluid, but it may be a liquid or a gel body.
The O-ring 25 may be a sealing and elastic means such as rubber packing or metal packing.

DESCRIPTION OF SYMBOLS 1 ... Container valve 11 ... Gas filling port 12 ... Gas supply port 13 ... Cylinder mounting part 20 ... Backflow prevention mechanism 20A ... Backflow prevention valve part 22 ... Check valve body 23 ... Pilot valve body 24 ... Backflow prevention spring 25 ... O-ring 40 ... pressure reducing mechanism 54 ... sheet assembly 90 ... flow path 91 ... primary side flow path 92 ... secondary side flow path 231 ... penetrating shaft part 233 ... gas outlet groove 300 ... fluid filling jig 312 ... connection part 361 ... equipment connection part 370 ... Valve opening mechanism 371 ... Push bar 372 ... Filling jig spring 373 ... Push rod 400 ... Pressure detection jig 412 ... Connection part 450 ... Push bar B ... Cylinder container N, N1 ... Internal space F ... Filling direction

Claims (10)

A container mounting portion attached to the storage container;
A fluid outlet for removing fluid;
While communicating from the container mounting portion to the fluid outlet, a flow path through which the fluid passes,
An on-off valve that switches between opening and closing at an intermediate portion of the flow path;
A filling port connected to the flow path and filling the storage container with the fluid;
A container valve in which the flow path is set as a primary flow path from a container attachment part side end to the open / close valve and a secondary flow path from the open / close valve to the fluid outlet;
While arranging the filling port in the primary side flow path,
The filling port includes a backflow prevention mechanism for preventing backflow of the fluid to be filled,
The backflow prevention mechanism is composed of check valve means and biasing means for biasing the check valve means in a valve closing direction opposite to the filling direction.
The check valve means,
A main check valve;
An auxiliary check valve that moves in the filling direction with respect to the main check valve,
A container valve in which the auxiliary check valve is smaller than the main check valve in a projected area in a direction orthogonal to the filling direction downstream of the filling direction. The biasing means biases the auxiliary check valve;
The container valve according to claim 1, wherein the main check valve is biased by the biasing means via the auxiliary check valve. While arranging a sealing member at the contact portion in the filling direction of the auxiliary check valve and the main check valve,
A through-shaft portion penetrating the main check valve on the upstream side in the filling direction from the seal member in the auxiliary check valve;
The container valve according to claim 1 or 2, wherein a fluid outlet groove for leading the fluid to an upstream side of the main check valve is provided on an outer peripheral surface of the through shaft portion. The container valve according to claim 3, wherein the upstream end portion of the through shaft portion protrudes upstream from the main check valve. The container valve according to any one of claims 1 to 4, further comprising a pressure reducing mechanism for reducing a pressure of a fluid to be taken out at the fluid outlet. A pressure detection jig connected to the filling port of the container valve according to any one of claims 1 to 5 to detect the pressure of the filled fluid,
A pressure detection jig mounting portion to be attached to the filling port;
A pressure gauge,
While communicating from the pressure detection jig mounting part to the pressure gauge, a flow path in the pressure detection jig through which the fluid passes,
A pressure detection jig comprising: a pressure detection jig moving operation means for moving the auxiliary check valve in the filling direction with respect to the main check valve. A container valve according to any one of claims 1 to 5;
A pressure detection unit connected to the pressure detection jig according to claim 6. A fluid filling jig connected to the filling port of the container valve according to any one of claims 1 to 5 and filling the fluid,
A filling jig attachment portion attached to the filling port;
A fluid supply device connection to which the fluid supply device is connected;
While communicating from the filling jig attachment part to the fluid supply device connection part, the flow path in the filling jig through which the fluid passes,
A fluid filling jig comprising a filling jig moving operation means for moving the auxiliary check valve in the filling direction with respect to the main check valve. The filling jig moving operation means,
A first moving body that moves in the filling direction by a filling operation;
A second moving body that pushes the auxiliary check valve in the filling direction by moving the first moving body in the filling direction;
It is arranged between the first moving body and the second moving body, and is constituted by a urging means for filling that urges in the filling direction,
The urging means for filling,
The fluid filling jig according to claim 8, wherein the fluid filling jig is configured to have a biasing force smaller than a biasing force of the biasing unit in a normal state and larger than a biasing force of the biasing unit by a filling operation. A container valve according to any one of claims 1 to 5;
A fluid filling unit connected to the fluid filling jig according to claim 8.

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