JP2829523B2 - Container valve for high-pressure gas / low-pressure gas selective extraction - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial application field >> The present invention relates to a high pressure gas in a gas cylinder, among container valves used for charging and discharging gas by being attached to a gas cylinder containing compressed gas, liquefied gas and the like. The present invention relates to a container valve capable of selectively taking out a low-pressure gas having a reduced pressure.

<< Basic structure as a premise >> Some of the container valves for selectively extracting high-pressure gas / low-pressure gas of this type have the following basic structure.

For example, as shown in FIG. 1 to FIG. 6 or FIG. 10 to FIG. 14, in the valve box 2 of the container valve 1, the gas inlet 5 is shut off through the valve chamber 8 of the stop valve 7. While communicating with 10,
The valve chamber 8 of the stop valve 7 communicates with the low-pressure gas outlet 15 through the valve chamber 13 of the pressure reducing valve 12. The pressure reducing valve 12 closes the pressure reducing body 26 with a valve closing spring 27. And the gas pressure actuator 30 presses the valve to the valve-closing side.
At the same time, the spring 32 is pushed toward the valve opening side, and is pushed toward the valve closing side by the gas pressure of the working chamber 33.
The pressure reducing valve body 26 is configured to be opened and closed by a gas pressure and a differential force of 33, and the working chamber 33 is configured to communicate with a secondary side of the valve chamber 13 of the pressure reducing valve 12. is there.

<< Prior Art >> In the above basic structure, as a structure of a portion for selectively performing operation of taking out high-pressure gas and taking out low-pressure gas, the structure shown in FIGS. 10 to 14 is conventionally known.

This means that the low-pressure gas outlet passage 14 can be sealed with a low-pressure plug 90 as shown in FIG. 13, and the high-pressure gas outlet passage 9 can be sealed with a high-pressure plug 91 as shown in FIG. It is configured to be stoppable.

When the high-pressure gas is taken out, as shown in FIG. 13, the high-pressure side plug 91 is removed from the high-pressure gas outlet 10 and the high-pressure gas outlet fitting 92 is connected to the high-pressure gas outlet 10 to connect the low-pressure side. The plug 90 seals the low-pressure gas extraction path 14. On the other hand, when taking out the low-pressure gas, as shown in FIG. 14, the low-pressure plug 90 is removed from the low-pressure gas outlet 15, and the low-pressure gas outlet fitting 93 is connected to the low-pressure gas outlet 15, and the high-pressure plug is connected. At 91, the high-pressure gas outlet 9 is sealed.

<< Problems to be Solved by the Invention >> By the way, in a state where this kind of container valve 1 is actually used, the frequency of extracting low-pressure gas is much higher than the frequency of extracting high-pressure gas. For this reason, the low pressure side plug 90
Since the foreign substance such as dust easily adheres to the outside of the valve box 2 for a long period of time, the foreign substance is removed between the sealing surfaces when it is inserted into the low-pressure gas extraction passage 14 at the next high-pressure gas extraction. Easy to bite. As a result, the sealing surface of the low-pressure plug 90 may be damaged, and gas may leak from the low-pressure gas outlet 15.

An object of the present invention is to prevent gas leakage from a low-pressure gas outlet during high-pressure gas outlet.

<< Means for Solving the Problems >> The present invention is characterized in that the following improvement is added to the above-mentioned basic structure in order to achieve the above object.

For example, as shown in FIGS. 1 to 6, a valve-closing and holding device 35 is attached to the pressure reducing valve 12, and the valve-closing and holding device 35 is given priority over the gas pressure actuator 30 and The valve closing operation state A in which the pressure reducing valve body 26 is held in the valve closing position;
30 and the above-described pressure reducing valve body 26 can be switched between a valve holding release state B in which opening and closing movement is possible.

Note that specific examples of the above-described valve-closing and holding device 35 include the following items (a) to (c).

(A) As shown in FIG. 1 to FIG. 6 or FIG. 7, as shown in FIG.
(53) and a support portion 37 (54) of the operating tool 36 (53).

(B) As shown in FIG. 8, the valve-closing holding device 57 includes a spring receiver 58 of the balancing spring 32 and a support portion 59 of the spring receiver 58.

(C) As shown in FIG. 9, the valve-closing holding device 62 includes a valve-closing operation tool 63 of the pressure-reducing valve body 26 and a support portion 64 of the valve-closing operation tool 63.

Further, in order to prevent gas leakage from the high-pressure gas outlet 10 when removing the low-pressure gas, the following configuration is further added.

As shown in FIG. 1 to FIG. 6, FIG. 8 and FIG. 9, a high-pressure gas discharge valve chamber is provided in a high-pressure gas discharge passage 9 from a valve chamber 8 of a stop valve 7 to a high-pressure gas discharge port 10. A high-pressure gas discharge valve body 18 is formed in the high-pressure gas discharge valve chamber 17.
Is openably and closably inserted into the high-pressure gas discharge valve seat 19, and the open-close operation section 18a of the high-pressure gas discharge main body 18 is provided facing the high-pressure gas discharge port 10, and the high-pressure gas discharge hole 43 is provided in the open / close operation section 18a. Was opened.

<< Operation >> The present invention operates as follows, for example, as shown in FIG. 1 to FIG.

At the time of removing the low-pressure gas, the container valve 1 is operated as shown in FIG. First, the stop valve 7 is closed, and the high-pressure gas outlet 9 is sealed with the high-pressure gas outlet valve 18 (or the high-pressure side plug of the conventional example).
Is connected to the low-pressure gas outlet fitting 93, and the valve-closing and holding device 35 is switched to the valve-closing and holding release state B. Next, the stop valve 7 is opened. Then, the high-pressure gas flowing out of the pressure reducing valve chamber 13 from the gas cylinder 4 via the stop valve valve chamber 8 is reduced in pressure to a predetermined low pressure by the pressure reducing valve body 26, and then the low-pressure gas outlet 14 and the low-pressure gas outlet 15. Through the low-pressure gas extraction fitting 93.

On the other hand, when the high-pressure gas is taken out, the container valve 1 is operated as shown in FIG. First, with the stop valve 7 closed, the high-pressure gas discharge valve element 18 is opened (or the conventional high-pressure plug is removed), and the high-pressure gas discharge fitting 92 is connected to the high-pressure gas discharge port 10. Is switched to the valve closing holding operation state A. Next, the stop valve 7 is opened. Then, the high-pressure gas flowing out of the valve chamber 8 of the stop valve 7 to the pressure-reducing valve chamber 13 is prevented from flowing out to the low-pressure gas take-out path 14 by the pressure-reducing valve body 26, and the high-pressure gas take-out path 9 and the high-pressure gas take-out port 10 are prevented. Through the high-pressure gas outlet fitting 92.

As described above, unlike the conventional example, when the high-pressure gas is taken out, the low-pressure side plug does not have to be inserted into the low-pressure gas take-out path 14, so that the low-pressure gas take-out port due to the foreign matter being trapped.
Gas leakage from 15 can be prevented.

Further, instead of the conventional high-pressure side plug, a high-pressure gas extraction valve body 18 is connected to the high-pressure gas extraction valve seat in the high-pressure gas extraction passage 9.
In the case where the high-pressure gas is inserted into the high-pressure gas discharge valve chamber 17 from the high-pressure gas discharge valve chamber 17 through the path of the high-pressure gas discharge hole 43 so that the high-pressure gas discharge valve body 18 is not removed from the valve box 2, Yes. For this reason, it is possible to prevent foreign matter such as dust from getting into the closing surface of the high-pressure gas removal valve element 18, and
It is also possible to prevent gas from leaking from the high-pressure gas outlet 10 at the time of extracting the low-pressure gas shown in the drawing.

<< Effects of the Invention >> The present invention has the following effects because it is configured and operates as described above.

When the high-pressure gas is taken out, the outflow of gas from the pressure-reducing valve chamber to the low-pressure gas taking-out port can be prevented by the pressure-reducing valve body. Therefore, unlike the conventional example, the low-pressure-side plug can be omitted from the low-pressure gas taking-out path. Therefore, it is possible to prevent the sealing surface of the plug from being damaged due to the intrusion of the foreign matter adhering to the low-pressure side plug, thereby preventing gas leakage from the low-pressure gas outlet.

Note that, in the case where a high-pressure gas extraction valve body is provided instead of the conventional high-pressure side plug, and this is inserted into the high-pressure gas extraction valve seat in the high-pressure gas extraction path so as to be capable of opening and closing, the following effects are further exhibited. . That is, it is not necessary to remove the high-pressure gas discharge valve body from the valve box, so that it is possible to prevent foreign matter such as dust from getting into the closing surface of the high-pressure gas discharge valve body. Can be prevented.

<< Example >> Hereinafter, an example of the present invention will be described with reference to the drawings.

(First Embodiment) FIGS. 1 to 6 show a first embodiment.

FIG. 1 is a view showing a state in which high-pressure gas is taken out, and is a cross-sectional view taken along line II of FIG. FIG. 2 is a view showing a state of taking out low-pressure gas, and is a view corresponding to FIG. FIG. 3 is a front view of the container valve. FIG. 4 is a cross-sectional view of FIG.
FIG. 4 is a sectional view taken along the line IV. FIG. 5 is a partial sectional view taken along line VV of FIG. FIG. 6 is a sectional view taken along line VI-VI of FIG.

As shown in FIG. 3, the container valve 1 has a leg screw portion 3 formed at a lower portion of a valve box 2 fixed to a gas cylinder 4 by screws. The old filling pressure (150kg / cm ² ) in the gas cylinder 4
High pressure gas of 300 kg / cm ² which is twice as high as that of gas can be filled, and it is possible to select the case of taking out the gas directly or the case of taking out by reducing the pressure to 150 kg / cm ² or less with the container valve 1. ing.

That is, as shown in FIG. 4, the gas in the gas cylinder is
The gas is introduced from the gas inlet 5 formed on the lower surface of the leg screw portion 3 to the high-pressure gas outlet 10 through the gas inlet passage 6, the valve chamber 8 of the stop valve 7, and the high-pressure gas outlet 9 in this order. In some cases, the gas is discharged from the valve chamber 8 to the low-pressure gas outlet 15 through the communication hole 11, the valve chamber 13 of the pressure reducing valve 12, and the low-pressure gas outlet 14 in this order (see FIG. 1). A high-pressure gas discharge valve body 18 is inserted into a high-pressure gas discharge valve seat 19 in a high-pressure gas discharge valve chamber 17 formed in the middle of the high-pressure gas discharge passage 9 so as to be freely opened and closed. The opening / closing operation portion 18a of the hexagonal hole of the high-pressure gas extracting valve element 18 is provided facing the high-pressure gas extracting port 10.

The stop valve 7 is provided with a valve rod 21 inserted into the valve lid 20 and a handle wheel 22.
The valve body 23 in the valve chamber 8 is rotated by the
Is opened and closed.

The pressure reducing valve 12 is configured as shown in FIG.
That is, the pressure reducing valve element 26 inserted into the pressure reducing valve chamber 13
, And is pressed by the gas pressure actuator 30 toward the valve opening side away from the pressure reducing valve seat 28. The gas pressure actuator 30 presses the pressure-receiving operating body 31 formed of a piston toward the valve-opening side with a balancing spring 32 formed of a plurality of disc springs, and presses the gas-pressured operating body 31 toward the valve-closing side with the gas pressure of the working chamber 33. The pressure reducing valve body 26 is configured to be opened and closed by the difference between the gas pressure in the working chamber 33 and the gas pressure in the working chamber 33. The working chamber 33 is communicated with a low-pressure gas extraction passage 14 which is a secondary side of the pressure reducing valve chamber 13. Further, the pressure receiving operating body 31 can be connected to the pressure reducing valve body 26 via the intermediate transmission rod 34.

A valve-closing and holding device 35 is attached to the pressure reducing valve 12. The valve-closing holding device 35 includes an operating tool 36 of the pressure-receiving operating body 31 and a support portion 37 of the operating tool 36, and is switched to the valve-closing holding action state A in FIG. On the other hand, when the low-pressure gas is taken out, the state is switched to the valve-closing holding release state B in FIG.

The switching of the valve closing holding device 35 to the valve closing holding operation state A is performed as follows.
As shown in FIGS. 1 and 6, the following is performed. First, the output part 39a of the propulsion bolt 39 of the operating tool 36 is
After engaging with the input section 40, the support section 37 formed of a female screw cylinder is used.
Into the propulsion bolt 39. Next, the valve closing operation handle 41 is inserted and fixed to the input portion 39b of the propulsion bolt 39. Subsequently, by rotating the handle 41, the thrust of the propulsion bolt 39 moves the pressure-receiving operating body 31 to the upper valve-closing holding position on the upper side in FIG. 1 against the elastic force of the balancing spring 32. Thus, the pressure reducing valve body 26 is closed and brought into contact with the pressure reducing valve seat 28 by the elastic pressure of the valve closing spring 27. And the valve element 23 of the stop valve 7
The high pressure gas in the gas cylinder is opened from the stop valve chamber 8 through the high pressure gas discharge passage 9 and the high pressure gas outlet hole 43 in the high pressure gas discharge valve 18 by opening the high pressure gas discharge valve 18. After that, it is taken out to the high-pressure gas outlet 10.

On the other hand, the valve closing holding release state B of the valve closing holding device 35
The switching to is performed by removing the operation tool 36 and the support portion 37 from the valve box 2 in a procedure substantially opposite to the above. As a result, as shown in FIG. 2, the operating tool 36 does not act on the pressure receiving operating body 31. Then, by opening the stop valve body 23 with the high pressure gas removal valve body 18 closed,
After the high-pressure gas in the gas cylinder is depressurized by the pressure-reducing valve 26, it is taken out of the working chamber 33 to the low-pressure gas outlet 15 via the low-pressure gas outlet 14.

Further, the valve box 2 is provided with a safety valve 44 for taking out low-pressure gas. That is, as shown in FIG. 5, a gas outlet hole 45 branches off from the middle of the low-pressure gas outlet passage 14, and a rupturable plate 48 is mounted via a holding bolt 47 to a safety valve chamber 46 facing the gas outlet hole 45. In this case, when the high-pressure gas is taken out as shown in FIG. 1, the pressure reducing valve body 26 is closed so that no gas pressure is applied to the low-pressure gas taking-out path 14, and the low-pressure gas taking-out path 14 can communicate with the atmosphere through a large flow path. Therefore, the safety valve shown in Fig. 12 of the conventional example
Unlike 95, the backup bolt 97 attached to the rupturable plate 96 can be omitted in case gas leaks due to damage of the sealing portion of the low-pressure side plug 90.

Further, since the high pressure gas discharge valve element 18 is opened and closed in the valve box 2 and does not need to be extracted from the high pressure gas discharge port 10, foreign matter is prevented from being caught between the valve element 18 and the valve seat 19. Is done.

7 to 8 show other embodiments, respectively.
A configuration different from the first embodiment will be described.

(Second Embodiment) FIG. 7 is a view corresponding to FIG. 1 showing a second embodiment, in which the valve closing and holding device 50 is switched to the valve closing and holding operation state A. In this case, an operation tool 53 including a propulsion bolt 51 and a valve closing operation handle 52, and a support portion 54 made of a female screw cylinder are always attached to the fixed side of the valve box 2. In the output portion 51a of the propulsion bolt 51, a valve-closing retention releasing gap 55 extending in the axial direction is formed, and when the propulsion bolt 51 is screwed to the lower valve-closing retention release state on the drawing, The output portion 51a of the propulsion bolt 51 does not interfere with the input portion 40 of the pressure receiving operation body 31.

According to the above configuration, the operator 53 and the support portion
Since it is not necessary to attach or detach the valve closing device 54, the switching operation of the valve closing and holding device 50 is easy.

(Third Embodiment) FIG. 8 is a view corresponding to FIG. 1 showing a third embodiment, in which the valve closing and holding device 57 is switched to the valve closing and holding operation state A. The valve-closing holding device 57 includes a spring receiver 58 of the balancing spring 32 and a support portion 59 made of a female screw cylinder. The spring receiver 58 is supported on the fixed side of the valve box 2 via a support portion 59 so as to be able to advance and retreat in the opening and closing direction of the pressure reducing valve body 26. By screwing the spring receiver 58 upward in the drawing, the elastic pressure of the balancing spring 32 is not applied to the pressure receiving operation body 31, and the pressure reducing body 26 closes and contacts the pressure reducing valve seat 28 with the elastic pressure of the valve closing spring 27. Is done. On the other hand, in a state where the spring receiver 58 is screwed downward in the drawing and received by the support portion 59, the balancing spring 32 is compressed, and the elastic force for balancing is applied to the pressure receiving operation body 31. As a result, the valve-closing holding device 57 is switched to the valve-closing holding release state, and the pressure reducing valve body 26 operates to reduce the pressure.

According to the above configuration, the valve closing and holding device 57 requires a small number of components, so that the configuration is simplified.

Fourth Embodiment FIG. 9 is a view corresponding to FIG. 1 showing a fourth embodiment, in which the valve closing and holding device 62 is switched to the valve closing and holding operation state A. The valve-closing holding device 62 includes a valve-closing operation tool 63 for the pressure-reducing valve body 26 and a support portion 64 made of a female screw. The valve closing operation tool 63 is screwed to the fixed side of the valve box 2 via a support portion 64 so as to be able to advance and retreat in the opening and closing direction of the pressure reducing valve body 26. Then, by screwing the valve closing operation tool 63 upward in the drawing, the valve closing operation tool 63 closes the pressure reducing valve body 26 against the elastic force of the balancing spring 32.
On the other hand, when the valve closing operation tool 63 is screwed downward in the drawing, the valve closing operation tool 63 does not act on the pressure reducing valve body 26. As a result, the valve-closing holding device 62 is switched to the valve-closing holding release state, and the pressure reducing valve body 26 operates to reduce the pressure.

According to the above-described configuration, the valve-closing holding device 62 has a small number of components, simplifies the configuration, and ensures the valve-closing operation of the pressure-reducing valve body 26.

[Brief description of the drawings]

1 to 9 show an embodiment of the present invention. 1 to 6 show a first embodiment. FIG. 1 is a view showing a state in which high-pressure gas is taken out, and FIG.
FIG. 2 is a cross-sectional view taken along the line II of FIG. 2, and FIG.
FIG. 3 is a front view of the container valve, FIG. 4 is a sectional view taken along line IV-IV of FIG. 3, and FIG. 5 is a partial sectional view taken along line VV of FIG. FIG. 6 is a sectional view taken along the line VI-VI of FIG. 7 to 9 show the second to fourth embodiments, respectively, and are equivalent to FIG. 10 to 14 show a conventional example. 10 is a front view of the container valve, FIG. 11 is a sectional view taken along line XI-XI of FIG. 10, FIG. 12 is a partial sectional view taken along line XII-XII of FIG. FIG. 11 is a diagram showing a high-pressure gas extraction state,
FIG. 14 is a cross-sectional view taken along the line XIII-XIII of FIG.
FIG. 1 ... container valve, 2 ... valve box, 5 ... gas inlet, 7 ... stop valve, 8 ... valve chamber, 9 ... high-pressure gas outlet, 10 ... high-pressure gas outlet, 12 ... decompression Valve, 13 ... Pressure reducing valve chamber, 15 ...
... low pressure gas outlet, 17 ... high pressure gas outlet valve chamber, 18 ...
… High pressure gas outlet valve, 19 …… High pressure gas outlet valve seat, 26
…… Reducing valve body, 27 …… Valve closing spring, 30 …… Gas pressure actuator,
31… Pressure receiving body, 32… Balance spring, 33 …… Working chamber,
35 …… Valve-closed holding device, 36 …… Operation tool, 37 …… Support part, 43
…… High-pressure gas outlet holes, 57 and 62 …… Valve closing and holding device, 58 ……
Spring receiver, 59/64 Support part, 63 Valve closing operation tool, A
... Valve-closed holding action state, B ... Valve-closed hold release state.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) G05D 16/00

Claims (5)

(57) [Claims] In a valve box (2) of a container valve (1), a gas inlet (5) is communicated with a high-pressure gas outlet (10) through a valve chamber (8) of a stop valve (7). The valve chamber (8) of the stop valve (7) is replaced with the valve chamber (13) of the pressure reducing valve (12).
The pressure reducing valve (12) is connected to the low pressure gas outlet (15) through the pressure reducing valve (12).
In 7), press the valve to the valve closing side and press the gas pressure actuator (30).
The gas pressure actuator (30) is configured such that the pressure-receiving operating body (31) is pressed toward the valve-opening side by a balancing spring (32) and the operating chamber (3).
The pressure is pushed toward the valve closing side by the gas pressure of 3), and the pressure reducing valve body (26) is opened and closed by the differential force between the balancing spring (32) and the gas pressure of the working chamber (33). The above-mentioned working chamber (33) is a valve chamber (13) of the above-mentioned pressure reducing valve (12).
A high-pressure gas / low-pressure gas selective discharge container valve configured to communicate with the secondary side of the above, wherein the pressure reducing valve (12) is provided with a valve closing holding device (35), and the valve closing holding device (35) Is the gas pressure actuator described above (30)
A valve closing operation state (A) in which the pressure reducing valve body (26) is held in the valve closing position in preference to the above, the gas pressure actuator (30) and the pressure reducing valve A container valve for selectively extracting high-pressure gas / low-pressure gas, wherein the container valve is configured to be switchable between a closed state and a released state (B) in which the body (26) can be opened and closed. 2. The valve closing and holding device (35) includes an operating tool (36) for the pressure receiving operating body (31) and a support portion (37) for the operating tool (36). The operating tool (36) is connected to the fixed side of the valve box (2) via the support portion (37), and the valve-closing holding operation state (A) and the valve-closing holding release state ( B), and in the above-described valve-closing holding operation state (A), the operation tool (3)
6) connects the pressure receiving operation body (31) with the balancing spring (3).
While the valve is held at the valve-closing holding position against 2), in the above-described valve-closing holding release state (B), the operating tool (3) is not used.
6. The high-pressure gas / low-pressure gas selective discharge according to claim 1, wherein 6) is configured to release the pressure-closed holding of the pressure-receiving operating body (31) and open and close the pressure-receiving operating body (31). Container valve. 3. The valve-closing holding device (57) includes a spring receiver (58) of the balancing spring (32) and a spring receiver (58).
The spring receiver (58) is provided on the fixed side of the valve box (2) via the support (59) to open and close the pressure reducing valve body (26). In the valve closing and holding state (A) and the valve closing and holding release state, and in the valve closing and holding state (A), The spring receiver (58) releases the resilient pressure of the balancing spring (32) from the pressure receiving operation body (31), whereas in the above-described valve-closed holding release state, the spring receiver (58) The high-pressure gas / low-pressure gas selective take-out container valve according to claim 1, wherein the pressure valve is configured to apply a balancing elastic pressure of the balancing spring (32) to the pressure receiving operation body (31). 4. The valve closing holding device (62) includes a valve closing operation tool (63) for the pressure reducing valve body (26) and a valve closing operation tool (6).
3) a support portion (64), and the valve closing operation tool (63) is provided on the fixed side of the valve box (2) via the support portion (64). 26) is configured to be adjustable in the opening / closing direction in the opening / closing direction so as to be switchable between the valve closing holding operation state (A) and the valve closing holding release state. In (A), the valve-closing operation tool (63) connects the pressure-reducing valve body (26) to the balancing spring (3).
In contrast to 2), the valve is operated to the valve-closing holding position, whereas in the above-mentioned valve-closing holding release state, the valve-closing operating device (63)
2. The container for selectively extracting high-pressure gas and low-pressure gas according to claim 1, wherein the pressure-reducing valve element (26) is configured to release the above-mentioned closed state of the pressure-reducing valve element (26) to open and close the pressure-reducing valve element (26). valve. 5. A high-pressure gas discharge valve chamber (17) in a high-pressure gas discharge passage (9) from the valve chamber (8) of the stop valve (7) to the high-pressure gas discharge port (10). To form
In the high-pressure gas discharge valve chamber (17), the high-pressure gas discharge valve (18) is inserted into the high-pressure gas discharge valve seat (19) so as to be openable and closable, and the high-pressure gas discharge valve (18) is opened and closed. Section (18a) is provided facing the high-pressure gas outlet (10), and the opening / closing operation section (18a) is provided with a high-pressure gas outlet (43).
The container valve for selectively extracting high-pressure gas / low-pressure gas according to any one of claims 1 to 4, wherein the valve is opened.