JPH0539896A - Gas filling device for bomb valve - Google Patents

Abstract

PURPOSE:To provide a device capable of filling gas efficiently in a bomb valve. CONSTITUTION:A gas inlet hole 6 of a valve box 4 is communicated with a gas outlet hole 8 after passing through a gas inlet passage 11, a stop valve seat 12 and a stop valve chamber 13 in order. A stop valve body 16 inserted into this stop valve chamber 13 is operated so as to open/close the stop valve seat 12 by means of a handle wheel 19. A check valve chamber 28, a check valve seat 27 and a gas receiving hole 10 are branched off in a linear shape from the gas inlet passage 11, and a check valve body 30 inserted into the check valve chamber 28 is suppressed to the check valve seat 27 by means of a check spring 31 so as to be closed. The tip part of a gas filling metal fitting 34 is connected to the peripheral wall 9 of this gas receiving hole 10 in a tightly fitting state. A valve opening tool 35 opposing the check valve body 30 from the gas receiving hole 10 side is arranged so as to be movable forward/backward freely to/from this check valve body 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for filling gas into a gas cylinder from a cylinder valve.

[0002]

2. Description of the Related Art Generally, a cylinder valve of this type has a gas inlet hole opened on a lower surface of a leg portion of a valve box and connected to a gas outlet hole through a gas inlet passage, a stop valve seat and a stop valve chamber in this order. ,
The stop valve body inserted in the stop valve chamber is configured to be opened and closed by a handle wheel to a stop valve seat.

In the above cylinder valve, the operation of filling the empty gas cylinder with gas is performed in the following procedure. First, open the stop valve by rotating the handlebar wheel to the loosening side. Then, a gas filling metal fitting is screwed into the gas outlet hole to fill the gas. After the gas filling is completed, the handle wheel is rotated to the tightening side and the stop valve body is closed. Subsequently, the gas filling fitting is removed from the gas outlet hole.

[0004]

In the above-mentioned cylinder valve, when the gas is filled, it is necessary to rotate the handle wheel twice for the loosening side and the tightening side. There was a problem that the efficiency of the filling work was poor.

In order to solve the above problems, the inventors of the present invention have taken advantage of the proposal by the applicant of the present application.
The idea of using the technique described in Japanese Patent Publication No. 1 was first considered. The technology is that a gas receiving nozzle is projected laterally from the mid-height part of the valve box, and the gas receiving hole opened in the gas receiving nozzle is made to communicate with the inside of the gas cylinder through the gas receiving passage. The commercially available quick joint plug with double-sided check valve is screwed and fixed to the male screw portion at the tip of, and the socket of the quick joint is fixed to the tip portion of the gas filling high-pressure hose. Then, at the time of gas filling, the socket on the high pressure hose side is connected to the plug on the valve side. Then, the two check valve bodies built in the socket and the plug are butted against each other to open the valve.

However, since this prior art has a structure in which two check valve bodies are opened by connecting a socket to a plug, the following problem newly arises. If the pressure of the residual gas in the collected gas cylinder is high, the socket must be connected against the valve closing force of the residual gas that acts on the check valve in the plug, and Since a large force is required, the efficiency of gas filling work is reduced.
Further, when the socket is separated from the plug after the gas filling of the cylinder is completed, the separating operation is performed while the pressure of the filling gas in the cylinder is still acting. Therefore, a large force is required for the separation operation of the quick coupling,
The operation becomes very difficult, further reducing the efficiency of the gas filling operation. An object of the present invention is to enable gas filling work to be performed efficiently.

[0007]

In order to achieve the above object, the present invention has a gas filling device configured as follows. For example, as shown in FIG. 1 to FIG. 5 or FIG. 9, the leg lower surface 5a of the valve box 4 of the cylinder valve 3 is passed through the gas inlet passage 11, the stop valve seat 12, and the stop valve chamber 13 in this order, and then the gas outlet hole. 8, the stop valve body 16 inserted into the stop valve chamber 13 is configured to be opened / closed to the stop valve seat 12 by the opening / closing operation means 20, and the leg lower surface 5a is connected to the check valve chamber 28. The check valve seat 27 and the gas receiving hole 10 are communicated with each other, and the check valve chamber 28, the check valve seat 27, and the gas receiving hole 10 are linearly formed, and the check valve chamber 28 is connected to the check valve chamber 28. The stop valve body 30 is inserted such that it can be opened and closed, and the check valve body 30 is inserted into the check spring 31.
The non-return valve seat 27 is closed by the closing valve, and the gas receiving hole 1
0 is connected to the peripheral wall 9 of the gas filling fitting 34 in a hermetically sealed manner, and the check valve is operated by the pressure of the filling gas that is press-fitted into the gas receiving hole 10 from the gas filling passage 39 of the gas filling fitting 34. The body 30 is configured to open the valve against the check spring 31, and the gas filling fitting 34 is provided with a valve opening tool 35 facing the check valve body 30 from the gas receiving hole 10 side. The check valve body 30 is provided so as to be movable back and forth, and the operating means 55 for moving the valve opening tool 35 forward and backward.
Was established.

The operating means 55 is preferably composed of a fluid pressure cylinder, but may be of an electromagnetic drive type or may utilize a screw thrust force. Further, as the sealing portion of the peripheral wall 9 of the gas receiving hole 10, the outer end surface 25a of the gas receiving hole 10, the inner peripheral surface, the inner bottom surface, and the like are considered.

[0009]

The above-described gas filling device is, for example, as shown in FIGS.
Alternatively, as shown in FIG. 9, it operates as follows. In the gas cylinder 1, the stop valve body 16 is brought into close contact with the stop valve seat 12 by the opening / closing operation means 20 in a state in which the gas is collected and left.

Before filling the cylinder 1 with fresh gas, first, the residual gas in the cylinder 1 is blown. That is, the tip portion of the gas filling metal fitting 34 is attached to the peripheral wall 9 of the gas receiving hole 10 of the cylinder valve 3 in a hermetically sealed manner. Then, fluid pressure or human force is applied to the operation means 55 of the gas filling fitting 34 to drive the valve opening device 35 to the left. Then, the valve opening tool 35 separates the check valve body 30 from the check valve seat 27 against the residual pressure in the cylinder 1 and the elastic force of the check spring 31. Then, the residual gas in the cylinder 1 becomes the gas inlet passage 11
Check valve chamber 28, gas receiving hole 10, and gas filling metal fitting 34
Then, the gas is blown to the outside through the gas filling passage 39 of FIG.

After completion of the blow process, the gas filling metal fitting 3
Fresh gas is supplied to the gas filling passage 39 of No. 4.
Then, the fresh gas flowing into the gas filling passage 39 is discharged from the gas receiving hole 10 into the check valve chamber 28 and the gas inlet passage 11.
After that, the gas cylinder 1 is filled.

When the gas filling is completed, the operation means 55 is returned to drive the valve opening device 35 backward to the right. Then, due to the elastic force of the check spring 31, the check valve body 3
0 closes the check valve seat 27 to prevent the fresh gas in the cylinder 1 from leaking from the gas inlet passage 11 to the gas receiving hole 10. Next, the pressure in the gas filling passage 39 of the gas filling metal fitting 34 is released, and the gas filling metal fitting 34 is removed from the cylinder valve 3 in this state.

When the impure gas in the cylinder 1 is sucked after the residual gas in the cylinder 1 is blown and the impure gas in the cylinder 1 is sucked, the filled fresh gas can be kept at a higher purity.

[0014]

The present invention has the following effects because it is constructed and operates as described above. Even if gas remains in the collected cylinder, first connect the gas filling metal fitting to the cylinder valve, and then open the check valve with residual pressure using the valve opening tool. Therefore, when the gas filling metal fitting is connected, the cylinder residual pressure does not act on the metal fitting. Therefore, the gas filling metal fitting can be lightly connected and its operation is easy. Further, when the fresh gas is filled, the gas is supplied to the gas cylinder from the filling metal fitting through the gas receiving hole, the check valve chamber, and the gas inlet passage in this order, so it is necessary to open and close the stop valve element by the opening and closing operation means. Gas filling work can be performed efficiently.

Further, when the gas filling of the cylinder is completed, the check valve body is closed by the check spring to prevent the reverse flow from the gas inlet passage to the gas receiving hole, so that the gas filling metal fitting is depressurized. Can be removed from the valve. Therefore, the filling metal fitting can be removed with a light force, and the gas filling work becomes easier.

When the fresh gas is filled with the check valve body forcibly opened by the valve opening tool, the pressure drop due to the cracking pressure of the check spring is eliminated, and the gas cylinder is filled accordingly. The pressure can be increased.

[0017]

【Example】

(First Embodiment) FIGS. 1 to 6 show a first embodiment.
First, the structure of the cylinder valve will be described with reference to FIGS.
2 is a longitudinal sectional view, and FIG. 3 is a view taken along the line III-III in FIG.

A leg portion 5 of a valve box 4 of a cylinder valve 3 is screwed and fixed to a neck portion 2 of a gas cylinder 1. A gas inlet hole 6 is opened downward on the lower surface 5a of the leg portion 5, and a gas outlet hole 8 is opened on a gas outlet nozzle 7 protruding leftward from an upper portion of the valve box 4. In addition, a gas receiving hole 10 is formed in a gas receiving nozzle 9 which is provided rightward from an intermediate height portion of the valve box 4.
Is opened.

The gas cylinder 1 and the cylinder valve 3 are constructed so as to be able to store compressed gas having a maximum working pressure of about 300 kgf / cm ² . Further, the cylinder valve 3 can be protected when the gas cylinder 1 falls over or collides with another object by screwing and fixing a protective cap (not shown) from the upper side to the male screw 2a provided on the cylinder neck 2. It has become.

The gas inlet hole 6 has the gas inlet passage 11, the stop valve seat 12 of the stop valve 15 and the stop valve chamber 13, the gas outlet passage 1
It is connected to the gas outlet hole 8 through 4 in order. Stop valve chamber 1
The stop valve body 16 inserted in 3 is opened / closed by the stop valve seat 12 by the opening / closing operation means 20 including the valve rod 18 inserted in the valve lid 17 and the handle wheel 19.

The gas receiving hole 10 is communicated with the gas inlet hole 6 through a gas receiving passage 22 which is orthogonal to the middle portion of the gas inlet passage 11. The check valve 2 is connected to the gas receiving passage 22.
3 is attached. That is, the check valve seat 27 and the check valve chamber 28 are provided in the cassette cylinder 25 that is fixed to the gas receiving passage 22 in a hermetically sealed manner.
And are sequentially provided linearly with respect to the gas receiving hole 10. The check valve chamber 28 is formed at the intersection of the gas inlet passage 11 and the gas receiving passage 22. The check valve body 30 mounted in the check valve chamber 28 is elastically closed by the check spring 31 against the check valve seat 27. Above gas receiving hole 1
The gas receiving nozzle 9 which is the peripheral wall of
4 is provided with a support portion A for supporting the supported portion B at the front end (the left end in FIG. 2) in a detachable manner. The valve opening tool 35 of the gas filling fitting 34 is configured to face the check valve body 30 through the gas receiving hole 10.

The cylinder valve 3 operates as follows. When the gas is stored in the gas cylinder 1, the stop valve body 16 is brought into close contact with the stop valve seat 12 by the handle wheel 19. Further, the check valve body 30 is brought into close contact with the check valve seat 27 by the gas pressure in the gas inlet passage 11 and the elastic force of the check spring 31, so that the gas in the gas inlet passage 11 is closed. It is prevented from leaking to 10. When the gas is taken out from the gas cylinder 1, the stop valve body 16 is separated from the stop valve seat 12 by the handle wheel 19. Then, as shown by the two-dot chain line arrow in FIG. 2, the gas in the gas cylinder 1 passes through the gas inlet hole 6, the gas inlet passage 11, the stop valve chamber 13, and the gas outlet passage 14 in this order from the gas outlet hole 8. Taken out.

Next, the gas filling fitting 34 will be described with reference to FIGS. 1, 4 and 5. FIG. 1 is a vertical cross-sectional view showing a state in which the gas filling fitting 34 is fixed to the cylinder valve 3. FIG. 4 shows another sectional view of the gas filling fitting 34,
FIG. 5 is a view taken along the line VV of FIG.

A gas filling passage 39 extending in the left-right direction is formed at the center of the casing 38. The gas filling path 39
Has one end connected to the gas filling hole 41 of the casing peripheral surface 40, and the other end of the gas filling passage 39 is opened to the left end surface of the casing. In the engagement operation cylinder hole 43 provided in the left portion of the gas filling passage 39, a cylindrical first piston 44, which is an engagement operation piston, is provided in the left-right direction via the O-ring first sealing member 45. It is inserted so that it can be sealed and moved freely. First above
A first drive chamber 46 is formed on the right outer side of the piston 44, and a forward spring 47 for elastically pressing the first piston 44 leftward is attached to the first drive chamber 46 to stop the forward movement of the first piston 44. It is blocked by a wheel 48.

A second sealing member 50 made of an O-ring is fitted to the left end surface of the first piston 44, and its second
The sealing member 50 is configured to be brought into sealing contact with the sealing outer end surface 25a of the cassette cylinder 25 of the cylinder valve 3. Further, as shown in FIG. 4, the first sealing member 4
The outer diameter dimension D for sealing 5 is set to a value larger than the outer diameter dimension d for sealing of the second sealing member 50.

The left portion of the rod-shaped valve opening tool 35 is movably inserted in the left-right direction into the cylindrical hole 44a of the first piston 44, and the right portion of the valve opening tool 35 is pressed down with the holding bolt 52.
The O-ring 53 and the O-ring 53 support the casing 38 so that the casing 38 can move in the left-right direction in a tightly sealed manner. The above-mentioned valve opening tool 35
Is operated in the left-right direction by a pneumatic operation means 55 fixed to the right part of the casing 38. The operating means 55 is formed by inserting a second piston 57 into a cylinder barrel 56 fixed to the right part of the casing 38. A second drive chamber 58 is formed on the right side of the second piston 57, and a return spring 59 is attached on the left side of the second piston 57. The right end portion of the valve opening tool 35 is fixed to the second piston 57 with a screw.

A supported portion B supported by the support portion A of the cylinder valve 3 is provided on the left side of the peripheral wall of the cylinder hole 43. As shown in FIGS. 1 and 3, the supporting portion A is formed at the tip of the gas receiving nozzle 9,
4 projecting outward in the radial direction with a predetermined gap in the circumferential direction
It comprises one locking wall 68 and an insertion groove 67 formed between these adjacent locking walls 68. These insertion grooves 6
7 and a circumferential groove 69 is formed on the left side of the locking wall 68 over the entire circumference.

The above-mentioned supported portion B projects to the left 4
One L-shaped convex portion 61 and four concave portions 62 that recede rightward are provided alternately in the circumferential direction. The L-shaped convex portion 61 is formed by connecting a locked wall 63 that projects inward in the radial direction and a turning permission groove 64 that retracts outward in the radial direction in the left-right direction.

A cylindrical operating tool 71 for engaging and locking is externally fitted on the peripheral surface 40 of the casing via two guide pins 72 and a guide groove 73 so as to be slidable in the left-right direction.
Two locks 77 are projected from the left side of the operation cylinder 71 to a position where they are fitted in the casing recess 62. The locking tool 77 is elastically pressed leftward from the casing 38 by the locking spring 78. The casing recessed portion 62 is provided with a retreat groove 79 that allows the lock 77 to move to the right.

The above gas filling fitting 34 is used for the gas cylinder 1.
It is used as follows during the gas filling work. Prior to gas filling, the gas filling fitting 34 is connected to the gas receiving nozzle 9 of the gas cylinder 1. That is, as shown in FIG. 1, when the locked wall 63 of the casing 38 is inserted into the insertion groove 67 of the gas receiving nozzle 9 and protrudes into the circumferential groove 69, as shown in the chain double-dashed line diagram of FIG. The operation tool 71 and the lock tool 77 are retracted to the right by the locking wall 68.

Next, when the casing 38 is swung by about 45 degrees, the locked wall 63 is received from the right side by the locking wall 68, and the locking tool 77 is inserted.
Face to face. At the same time, the lock 77 is pushed into the insertion groove 67 by the elastic force of the lock spring 78.
As a result, the turning of the casing 38 is locked, and the gas filling fitting 34 can be prevented from falling off the nozzle 9.

Next, the operation of filling the gas cylinder 1 with gas will be described with reference to FIG. First, compressed air is supplied to the second drive chamber 58 of the operating means 55. Then, the valve opening tool 35 is driven leftward via the second piston 57, and the valve opening tool 35 resists the residual pressure in the gas cylinder 1 and the elastic force of the check spring 31 to prevent the check valve body 30. Is separated from the check valve seat 27. Then, the residual gas in the cylinder 1 is discharged from the gas filling hole 41 through the gas inlet passage 11 and the gas receiving passage 22 and the gas filling passage 39 of the gas filling fitting 34. Subsequently, vacuuming work is performed from the gas filling hole 41 of the gas filling fitting 34. Then, the impure gas remaining in the gas cylinder 1 is discharged through the same route as above.

After that, the gas filling hole 4 of the gas filling fitting 34
Fresh gas is supplied from 1 to the gas filling passage 39. Then, the first piston is generated by the difference between the pressure receiving force corresponding to the sealing outer diameter dimension D of the first sealing member 45 and the pressure receiving pressure corresponding to the sealing outer diameter dimension d of the second sealing member 50. 44 is pressed leftward, and its first piston 44 seals and abuts the sealing outer end surface 25a of the cassette tube 25 via the second sealing member 50. Then, the fresh gas flowing into the gas filling passage 39 is filled into the gas cylinder 1 from the check valve chamber 28 through the gas inlet passage 11.

When the above gas filling is completed, the second drive chamber 5
Exhaust compressed air from 8. Then, the return spring 59 causes the valve opening tool 35 to retract, and the check valve body 30 is closed by the check spring 31. In this state, the gas in the gas filling passage 39 is released from the filling hole 41, and the gas filling metal fitting 34 is removed from the gas cylinder 1.

The above removing operation is performed as follows.
First, as shown by the chain double-dashed line diagram in FIG. 4, the operating portion 81 of the operating tool 71 is pressed rightward to remove the locking tool 77 from the insertion groove 67. In this state, the casing 38
The locked wall 63 is swung out only once and pulled out to the right through the insertion groove 67.

The gas filling metal fitting 34 having the above construction has the following advantages. When connecting the gas filling metal fitting 34 to the cylinder valve 3 in a hermetically sealed manner, the sealing outer end surface 2 of the gas receiving nozzle 9 is connected.
Since it suffices to bring the tip end surface of the first piston 44 into contact with 5a in the axial direction, the sealing member 50 is less likely to be damaged during the connecting operation as compared with the case of the peripheral surface fitting type seal structure.

Before the fresh gas is filled, the second sealing member 50 is pressed against the outer end surface 25a of the cylinder valve 3 via the first piston 44 by the elastic force of the forward spring 47, and the forward spring 47 is also applied. First by the elastic force of
Since the mounting posture of the casing 38 can be held straight through the piston 44, the initial seal at the time of gas filling is good.

A gas filling system using the cylinder valve 3 and the gas filling fitting 34 will be described with reference to FIG. The gas header 83 installed in the gas filling station is provided with about 20 header valves 84, and each header valve 84 is connected to the high pressure hose 85.
And the gas filling metal fitting 34 in this order, and is connectable to the cylinder valve 3 of the gas cylinder 1. At the left end of the gas header 83, a blow valve 86, a vacuum valve 87, and a filling valve 88 are connected. These four types of main valves 84, 86, 87 and 88 are normally closed pneumatically operated valves. In the initial state, all the operation solenoid valves 89, 90, 91, 92, 93 are switched to the discharge position, so that all the above-mentioned main valves are closed. Further, the header main valve 84 is configured so that it cannot be opened unless the cylinder valve 3 is connected. The operation air line M is provided with a filter 95, a pressure reducing valve 96, 96, and a lubricator 97, 97 in order.

The operation of filling the cylinder 1 that has been collected with the gas remaining therein with the high-purity fresh gas is performed in the order of the step of blowing the residual gas, the step of evacuating the inside of the cylinder, and the step of filling the gas.

The above gas blowing step is performed in the following procedure. First, the header solenoid valve 89 is switched to the supply position to open the header valve 84, and the blow solenoid valve 90 is opened.
Is switched to the supply position to open the blow valve 86. Next, the metal fitting solenoid valve 91 is switched to the supply position. Then,
The valve opening tool 35 driven by the pneumatic operation means 55 forcibly opens the check valve 23 against the residual pressure in the cylinder 1. As a result, the residual gas in the cylinder 1 is discharged to the blow line U through the gas filling fitting 34, the header valve 84, and the blowing valve 86 in this order.

Subsequently, the vacuuming process is performed in the following procedure. The blow solenoid valve 90 is switched to the discharge position to close the blow master valve 86, and the vacuum evacuation solenoid valve 92 is switched to the supply position to open the vacuum master valve 87.
Then, a vacuum pump provided at the end of the vacuum line V
Impure gas remaining in the cylinder 1 is sucked by (not shown).

Next, the gas filling step is performed in the following procedure. The vacuum evacuation solenoid valve 92 is switched to the discharge position to close the vacuum evacuation source valve 87, and the filling solenoid valve 9 is closed.
3 is switched to the supply position, and the filling main valve 88 is opened. Then, the fresh gas in the high-pressure tank (not shown) connected to the starting end of the filling line W passes through the filling main valve 88, the gas header 83, the header main valve 84, and the gas filling metal fitting 34 in this order to the cylinder 1. It will be filled. When the filling is completed, the metal fitting solenoid valve 91 is switched to the discharge position to open the valve opening tool 3
Retract 5 Then, the check valve 23 of the cylinder valve 3
Automatically closes. Alternatively, the metal fitting solenoid valve 91 may be switched to the discharge position from the start of the gas filling process, and the valve opening tool 35 of the gas filling fitting 34 may be retracted and returned. In this case, the check valve 23 is automatically opened by the pressure of the fresh gas to be charged.

Finally, the main valve for filling 88 is closed and the main valve for blowing 86 is opened to depressurize the gas filling fitting 34 to the gas header 83. Then, the gas filling metal fitting 34 is removed from the cylinder valve 3.

Note that each of the above-mentioned main valves may be constituted by a solenoid valve or a motorized valve instead of the pneumatically operated type. Further, in each of the above steps, it is preferable to provide an interlock circuit in the pneumatic circuit or the electric circuit in order to prevent a mistake in the opening / closing operation of each main valve. In the system in which the collected gas cylinder 1 is additionally filled with fresh gas, the blow line U, the vacuuming line V, etc. can be omitted.

FIG. 7 and FIG. 8 each show a modified example of the cylinder valve, in which the valve of FIG. 2 is modified as follows. In these modified examples, members having the same configurations as those in the first embodiment are designated by the same reference numerals.

In the cylinder valve of FIG. 7, the stop valve body 16, the valve rod 18, and the handle wheel 19 are provided sideways, the gas outlet hole 8 is also provided sideways, and the gas receiving hole 10 and the gas receiving passage 22 are provided upward. There is. Thereby, the gas filling metal fittings can be connected along the central axis of the gas cylinder and the cylinder valve 3, and the connection operation can be easily automated.

In the cylinder valve of FIG. 8, the gas receiving passage 22
Through the gas inlet passage 11 at a right angle to the gas receiving passage 2
A check valve body 30, a check spring 31, and a spring receiver 99 are sequentially inserted from the left opening end side of No. 2. Reference numeral 8 is a gas outlet hole. The check valve chamber 28 includes the gas inlet passage 11 and the gas receiving passage 22.
It is formed at the intersection with and. Note that in the above cylinder valve, the check valve 23 can be configured as a cassette, as in the case of FIG.

9 to 15 show another embodiment of the connecting structure between the cylinder valve 3 and the gas filling fitting 34, respectively. In addition, in these examples, in FIG.
The members having the same configuration as are given the same reference numerals.

(Second Embodiment) FIG. 9 shows a second embodiment. The cylinder valve 3 has the same structure as that of FIG. Further, the sealing cylinder 42 is screwed and fixed to the left end portion of the casing 38, and the sealing member 50 mounted on the outer peripheral surface of the sealing cylinder 42 is sealingly abutted on the inner peripheral surface of the gas receiving hole 10. .. As described above, the sealing surface on the cylinder valve 3 side is connected to the nozzle 9
Since it is provided inside, the sealing surface on the cylinder valve 3 side can be prevented from being damaged even when the gas cylinder is roughly handled, and the sealing life can be kept good for a long period of time.

(Third Embodiment) FIG. 10 shows a third embodiment, in which the above-mentioned FIG. 9 is modified as follows. As shown in the lower half diagram, the sleeve 5 fitted onto the casing 38
When 1 is retracted against the pushing spring 54, the engagement between the groove 65 on the outer peripheral surface of the gas receiving nozzle 9 and the ball 66 is released, and the gas filling metal fitting 34 can be attached to and detached from the nozzle 9. On the other hand, as shown in the upper half diagram, the spring 54
When the sleeve 51 is advanced by, the ball 66 is engaged with the groove 65 and the metal fitting 34 is fixed to the nozzle 9. The groove 65 constitutes a supporting portion A, and the ball 66 constitutes a supported portion B.

(Fourth Embodiment) FIG. 11 shows a fourth embodiment in which a sealing member 50 is attached to the inner peripheral surface of the gas receiving hole 10.
The outer peripheral surface of the distal end portion of the casing 38 is brought into sealing contact with the sealing member 50. In addition, the sealing member 50 described above.
Can also be mounted on the bottom wall of the gas receiving hole 10.

(Fifth Embodiment) FIG. 12 shows a fifth embodiment. Instead of the sleeve 51 and the ball 66 shown in FIG. 10, a plurality of cams 70 are provided at the front of the casing 38 of the gas filling fitting 34. Is rotatably supported.

(Sixth Embodiment) FIG. 13 shows a sixth embodiment. The cylinder valve 3 has the same structure as that shown in FIG. When switching from the separated state in the lower half diagram to the connected state in the upper half diagram, first, the gas filling metal fitting 34 is moved to the left side toward the cylinder valve 3 and the gas receiving hole 1
The sealing tube 42 is brought into contact with the sealing outer end surface 25a of 0. Next, when the sleeve 32 is moved to the left side, the plurality of connecting fittings 33 engage with the gas receiving nozzle 9 and the sleeve 32 is locked by the ball 37.

(Seventh Embodiment) FIG. 14 shows a seventh embodiment, in which the support portion A of the cylinder valve 3 is constituted by a male screw. Further, the sealing cylinder 42 is screwed and fixed to the tip of the casing 38 of the gas filling fitting 34, and the supported portion B is constituted by the female screw of the cap nut 74 supported by the sealing cylinder 42.

(Eighth Embodiment) FIG. 15 shows an eighth embodiment, in which the support portion A of the cylinder valve 3 is formed by a female screw of the gas receiving hole 10. Further, the pressing metal fitting 76 is fixed to the tip of the casing 38 of the gas filling metal fitting 34, and the supported portion B is constituted by the male screw of the operation bolt 75 fitted onto the metal fitting 76. The screw thrust of the operation bolt 75 causes the pressing metal fitting 76 to be brought into sealing contact with the bottom surface of the gas receiving hole 10.

The valve-opening tool operating means 55 provided on the gas filling fitting 34 may be a double-acting cylinder, or may be a manually-operated one using screw thrust. When receiving the pressure acting on the filling metal fitting 34 from the gas receiving hole 10 at the time of filling the fresh gas, instead of receiving it by the support portion A of the nozzle 9, the main body portion of the valve box 4 or the cylinder 1 receives it. Good.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment and showing a state in which a gas filling metal fitting is fixed to a cylinder valve.

FIG. 2 is a vertical sectional view of the cylinder valve.

FIG. 3 is a view taken along the line III-III in FIG.

FIG. 4 is a view showing another cross section of the gas filling metal fitting.

5 is a view taken along the line VV of FIG.

FIG. 6 is a system diagram of a gas filling system using the valve and the metal fitting.

FIG. 7 is a view corresponding to FIG. 2, showing a modified example of the cylinder valve.

FIG. 8 is a view corresponding to FIG. 2, showing another modification of the cylinder valve.

FIG. 9 shows a second embodiment and is a diagram corresponding to FIG. 1.

FIG. 10 is a partial view corresponding to FIG. 1, showing a third embodiment.

11 is a partial view showing a fourth embodiment and corresponding to FIG. 1. FIG.

FIG. 12 is a partial view showing a fifth embodiment and corresponding to FIG.

FIG. 13 is a partial view showing a sixth embodiment and corresponding to FIG.

14 is a partial view showing a seventh embodiment and corresponding to FIG. 1. FIG.

FIG. 15 is a partial view corresponding to FIG. 1, showing an eighth embodiment.

[Explanation of symbols]

3 ... cylinder valve, 4 ... valve box, 5a ... leg bottom surface, 8 ... gas outlet hole, 9 ... peripheral wall of gas receiving hole 10 (gas receiving nozzle), 10 ... gas receiving hole, 11 ... gas inlet passage, 12 ... Stop valve seat, 13 ... Stop valve chamber, 16 ... Stop valve body, 20 ... Open / close operation means, 25a ... Outer end surface for sealing gas receiving hole 10, 2
7 ... Check valve seat, 28 ... Check valve chamber, 30 ... Check valve body, 31
... Check spring, 34 ... Gas filling metal fitting, 35 ... Valve opening tool, 39
... Gas filling passage, 43 ... Cylinder hole, 44 ... Piston (first piston), 45 ... First sealing member, 47 ... Advance spring,
50 ... Second sealing member, 55 ... Operating means, D ... Sealing outer diameter dimension of first sealing member 45, d ... Second sealing member 50 sealing outer diameter dimension.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsumasa Kagomoto 4-6-1 Shimozakabe, Amagasaki City, Hyogo Prefecture Neriki Co., Ltd.

Claims (3)

[Claims] 1. The lower surface of the leg of the valve box (4) of the cylinder valve (3)
Gas inlet path (11), stop valve seat (12) and stop valve chamber (5a)
(13) in order to communicate with the gas outlet hole (8), and the stop valve body (16) inserted into the stop valve chamber (13) is opened and closed by means for opening and closing operation.
The stop valve seat (12) is configured to be opened and closed by (20), and the lower surface (5a) of the leg portion is connected to the check valve chamber (28) and the check valve seat (2).
7) to communicate with the gas receiving hole (10), and the check valve chamber (28), the check valve seat (27), and the gas receiving hole (10) are formed in a straight line, and the above check valve is formed. Check valve body (30) in the valve chamber (28)
Is movably inserted into the check valve body (30), and the check valve body (30) is closed by a check spring (31) to close the check valve seat (27), and the peripheral wall (9) of the gas receiving hole (10) is closed. Gas filling metal fittings (34)
Gas-tight metal fittings (34) connecting the tips of the
The non-return valve body (30) is opened against the non-return spring (31) by the pressure of the filling gas that is press-fitted into the gas receiving hole (10) from the gas filling passage (39). And a valve opening member (35) facing the check valve body (30) from the gas receiving hole (10) side in the gas filling metal fitting (34). A gas filling device for a cylinder valve, wherein the gas filling device for a cylinder valve is provided so as to be movable back and forth with respect to the above, and an operation means (55) for moving the valve opening tool (35) forward and backward. 2. The gas filling device for a cylinder valve according to claim 1, wherein a cylinder hole for engaging operation is provided in a front portion of the gas filling passage (39).
(43) is provided, and a cylindrical engaging operation piston (44) is inserted into the cylinder hole (43) through the first sealing member (45) so as to be able to move tightly in the front-rear direction. )) Forward spring (47)
And a front end face of the piston (44) and the gas receiving hole.
Second sealing member between the sealing outer end surface (25a) of (10)
(50) is provided, and the outer diameter dimension (D) for sealing of the first sealing member (45) is the outer diameter dimension for sealing of the second sealing member (50).
Set to a value larger than (d). 3. The gas filling device for a cylinder valve according to claim 1, wherein the front portion of the peripheral wall of the gas filling passage (39) and the gas receiving hole (1).
A sealing member (50) is provided between the inner peripheral surface of (0) and the inner peripheral surface.