JP3016988U - Tension type gas release prevention device - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] When the gas container falls or is greatly tilted, the locking pin is pulled out to close the valve opening by the valve body, and also to prevent the gas overflow function that works when the pipe is damaged. The provided valve body shuts off the gas release. [Structure] A guide portion 15 having a valve body 16 that closes the valve opening 13 when a gas flow rate above a certain level is generated in a valve opening 13 formed in a lower portion of the passage 11 of the valve body 10 can be moved up and down in the passage 11. Distribute to. An operating shaft 40 that is vertically movably inserted through the center of an upper body 30 attached to the upper portion of the valve body 10.
The lower end of the operating shaft 40 is inserted into the lower end of the operating shaft 40, and the lower end of the operating shaft 40 is provided with a flange part 42 for engaging with the guiding part 15. The shaft spring 45 is elastically released. A latching piece that latches the upper part of the operating shaft 40 is detachably attached to the valve body 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a tension-type gas release prevention device mounted on a gas container that contains LP gas and other high-pressure gas.

[0002]

[Prior art]

 If a large amount of high-pressure gas such as flammable gas, combustion-supporting gas, and toxic gas leaked into the atmosphere, there was a risk of fire or explosion. Therefore, in addition to the pressure regulator, the gas release preventer 3 is attached to the container valve 2 mounted on the gas container 1 for safety. In particular, the gas release protector 3 connected to the container valve 2 attached to the LP gas container 1 has a gas overflow when a pipe 7 or the like is damaged due to an earthquake or an external shock while the gas is in use. Fires and secondary disasters will occur due to the release. Also, when the gas container 1 falls or tilts due to the external impact of falling objects such as snow or falling rocks, and the pin 5 attached to the valve operating rod 4 is pulled out, the valve opening is closed and gas is prevented from being released. There was a tension-type release check valve, and each had an individual gas release prevention device. This tension type release prevention valve operates the valve body inside the valve body to close the valve opening by the operation of the operating rod 4 provided in the valve body of the gas release prevention device 3, but normally the valve body is closed. U-shaped pin 5 is inserted into the groove of the actuating rod 4 projecting upward from the upper end of the rod, and the end of the pin is connected to a stable support portion such as a house or a pillar. Chain, string, wire, chain, etc. The gas container 1 is attached to the connector 6 and the pin 5 is pulled out through the connector 6, and the valve rod is closed by the operation of the operating rod 4 to prevent gas release.

[0003]

[Problems to be solved by the device]

 As described above, in the conventional tension type check valve, when the pin is pulled out, the actuating rod and the pushing shaft are actuated to close the valve port and prevent gas release. In addition, there was a conventional gas release prevention valve that closed the valve opening due to gas overflow caused by gas leakage due to damage to the pipe connected to the gas container, but there was no gas release prevention valve that also had these functions. According to the present invention, the valve body is closed by pulling the locking pin out of the valve body to operate the valve body, and the valve body is operated by gas overflow due to breakage of piping or the like to close the valve body. The purpose is to prevent outgassing.

[0004]

[Means for Solving the Problems]

 According to the present invention, a connecting cylinder portion for connecting a container valve is provided on one side, and a valve opening is formed in a lower portion of a passage provided in a valve body having a connecting receiving portion for connecting a pipe on the other side. A guide part equipped with a valve body that closes the valve opening by a gas flow rate above a certain level is arranged in the valve chamber provided below so that it can move up and down in the passage, and it is installed at the center of the upper body attached to the upper part of the valve body. The lower end of the actuating shaft which has a push button on the upper part, which is movably inserted vertically, is provided with a brim part which engages with the guide part, and is elastically struck between the engaging brim provided on the actuating shaft and the upper body. The locking flange of the actuating shaft that lowers against the shaft spring and the locking part that locks are removably locked to the locking receiving part provided on the valve body. It is characterized in that the valve opening is closed by the valve body of the guide portion that engages with the actuating shaft that is raised by the elastic force of the shaft spring. Further, the present invention provides a connecting hole up to the rear end in the rear of the accommodation chamber provided inside the tip of the insertion cylinder having a locking flange on the outer circumference of the tip, and has an insertion flange on the outer circumference of the tip to communicate with the inside. The front end portion provided with is attached to the tip of the insertion cylinder, an O-ring is attached between the insertion flange portion and the locking flange portion, and the communication hole is closed in the accommodating chamber of the insertion cylinder. A movable valve having a stop valve part in the front part and a stop valve part in the rear part that closes the connecting hole is housed so as to be movable back and forth, a spring is arranged in front of the movable valve, and a gas flow groove is formed on the peripheral surface. In the valve body formed by fixing the rear end of the support rod whose front end is locked to the rear end of the movable valve provided between the rear part of the insertion cylinder and the connecting cylinder part provided on one side of the valve body. A valve body that is provided with a passage and closes the valve opening by a gas flow rate above a certain level in a valve chamber provided below the valve opening formed in the lower portion of the passage. A guide part having a vertical axis is arranged in the passage so as to be vertically movable, and the vertically movable body is inserted through the center of an upper body attached to the upper part of the valve body. The lower part of the operation shaft is provided with a flange part that engages with the guide part and is lowered against the shaft spring elastically struck between the upper part of the locking flange and the upper part of the operation shaft. A guide that hooks onto the operating shaft that is lifted by the shaft spring when the hooking piece that hooks with the shaft is detachably hooked to the hooking receiving part provided on the valve body, and the hooking piece drops off. The feature of this school is that the valve port is closed by the valve body of this part.In addition, this school plan is to insert it into the hole provided at the center of the upper body attached to the upper part of the valve body and The lower end is inserted into the guide, and the lower end of the actuating shaft is provided with a brim that engages with the guide, and a shaft spring is resiliently provided between the actuating shaft and the upper body. In addition, a locking pin attached to the upper body is provided with a pin hole, and a locking pin that locks the locking flange of the actuating shaft that compresses the shaft spring and pushes it down is detachably attached to the pin hole. It is characterized by having done. Furthermore, the present invention provides a window portion on the wall surface of the valve body, and is vertically movably mounted in a passage of the valve body to form a colored portion on the outer periphery of a guide portion having a valve body, The feature is that the presence or absence of the colored part can be confirmed from the part.

[0005]

[Action]

 If the gas container falls over or tilts and the latching pieces such as the locking pin are pulled out from the latching receiving part provided on the valve body, the elastic force of the shaft spring moves the operating shaft upward to move the guide part. By pulling up, the valve body provided in the guide portion is raised to close the valve opening, thereby preventing gas discharge. Further, when the gas flow rate increases due to damage to the pipes connected to the gas container, the valve opening through which the gas overflow flows is closed by the valve body to prevent gas release. Further, the operating state of the valve body can be easily confirmed by checking the presence or absence of the colored portion provided in the guide portion through the window provided in the wall portion of the valve body.

[0006]

【Example】

 A first embodiment of the present invention will be described with reference to FIGS. 3 to 6. A passage 11 is provided inside the first valve body 10, and a lower portion of a passage 11a having a slightly smaller diameter is provided below the passage via a step 12. A valve opening 13 having a slightly smaller diameter is formed, and a lower lid 19 is attached to the lower end of a valve chamber 14 having a slightly larger diameter provided below the valve opening. A guide portion 15 is housed in the passage 11 so as to be movable up and down, and an upper end of a rod-shaped valve body 16 is attached to the guide portion and fixed by a snap ring 16d. It is movably inserted. The valve body 16 has an upper small opening 16b and a lower small opening 16c formed at the upper and lower sides connected to each other through a communication opening 16a, and an O-ring 18 for closing the valve opening 13 is attached to the lower outer circumference of the valve body. A shaft hole 31 is provided at the center of an upper body 30 mounted with an O-ring mounted above the passage 11 of the valve body, and a recess 33 provided in the upper part of the upper body and a spring groove portion 34 below the recess. Has been formed. Although a lock receiving portion 36 such as a pin hole is provided in the locking cylinder 35 fixed in the concave portion 33, and a spring 37 is urged between the lower portion of the upper body 30 and the guide portion 15. The spring 37 is not always necessary. Further, the colored portion 15a is formed on the outer periphery of the guide portion 15, and the operating state of the valve body 16 can be confirmed by confirming the presence or absence of the colored portion 15a from the window portion 11a provided in the valve body described later. it can.

A latching piece 38, which comprises a locking pin and a latching portion formed in a substantially U shape, is detachably inserted into a latching receiving portion 36 provided in the locking cylinder 35, and the latching is performed. An arcuate portion 39 for providing elastic force is provided on the rear portion of the piece 38, and stopper pieces 39a are provided on the outer sides of the tips so as not to come off with a little force. A connecting tool 6 such as a chain is attached. Reference numeral 40 denotes an operating shaft having an O-ring attached to the inner surface of the shaft hole 31 of the upper body 30 and inserted therein. The lower end of the operating shaft is provided with a collar portion 42 formed at the lower end of the operating shaft. The upper part of the guide part can be hooked. Further, a hooking portion 43 and a locking collar 44 are continuously provided at a substantially constant interval above the operating shaft 40, and a shaft spring 45 is interposed between the locking collar 44 and the spring groove portion 34 to operate. The shaft 40 is repulsed upward, and a push button 46 is attached to the upper end of the operating shaft. A through hole 21 provided inside a threaded hole formed on the inner surface of the connecting cylinder portion 20 provided on one side of the lower portion of the valve body 10 communicates with the valve chamber 14, and a connection provided on the other side of the lower portion of the valve body. A communication port 26 provided inside a threaded hole formed on the inner surface of the receiving portion 25 communicates with the flow path 11a. The operating shaft 40 is pushed down against the elastic force of the shaft spring 45, and the engaging portion 38 such as a locking pin is inserted into the engaging receiving portion 36 such as a pin hole provided in the engaging cylinder 35. The state in which the upper surface of the locking collar 44 is locked is a normal use state (FIG. 3).

When the pipe 7 connected to the gas container 1 shown in FIG. 2 through the container valve 2 and the valve body 10 is broken, the operating shaft 40 is attached to the hooking piece 38 as shown in FIG. Although the upward movement is restricted, the valve body 16 is lifted by the gas excess flow passing through the communication hole 16 a of the valve body 16 located at the valve mouth 13 and the valve mouth 13 is closed by the O-ring 18. (Fig. 5). In this case, the guide portion 15 having the valve body 16 attached to the lower part also rises, but the operating shaft 40 cannot rise, so that the collar part 42 of the operating shaft comes close to the upper part of the raised valve body 16, but they are not related to each other. It is configured so that they do not match. In addition, when the gas container 1 falls or tilts, a hooking piece 38 is connected from the hooking receiving portion 36 of the locking cylinder, the hooking piece 38 connecting one end to the stable supporting part such as a house or a pillar with the connecting tool 6. When it is pulled out, the locking flange 44 of the operating shaft becomes free and rises due to the elastic force of the shaft spring 45 (FIG. 6), and as shown in FIG. 3, it is locked at the flange portion 42 of the operating shaft. The guide portion 15 that is present also rises, and the valve opening 13 is closed by the seal ring 18 of the valve body 16 provided in the guide portion, and the gas release is blocked by the valve chamber 14. Since the operating shaft 40 is not directly connected to the guide portion 15, when the collar portion 42 rises, the guide portion 15 locked to the collar portion also rises.

Further, referring to FIG. 3, the case where the gas release preventing device 9 is attached to the connecting cylinder portion 20 provided on one side of the valve body 10 will be described. The female thread portion of the connecting cylinder portion 20 is locked to the outer periphery of the tip. The rear portion of the insertion cylinder 48 having the flange portion 47 is connected, and a small-diameter connecting hole 50 is formed to the rear end inside the storage chamber 49 provided at the inner end of the insertion cylinder. A recessed portion 51 is provided on the end surface. On the outer periphery of the insertion tube 48, a connecting body 9a having a connecting screw portion 52 on the outer periphery of the distal end and a tightening portion 52a having a large diameter on the rear portion is rotatably attached to the connecting portion 2a of the container valve 2. There is. A front end portion 54 having a slightly larger diameter insertion flange portion 53 in the front portion is screwed inside the front end of the insertion cylinder 48, and an O-ring 55 is provided between the insertion flange portion 53 and the locking flange portion 47. A taper surface is provided at the rear end of the communication through hole 53a provided at the center of the tip end portion. A movable valve 56 is housed in the accommodating chamber 49 of the insertion cylinder so as to be movable back and forth, and a check valve portion 56a equipped with an opening for closing the rear end of the communication through hole 53a is provided in the front portion of the movable valve. Further, an o-ring is attached to the stop valve portion 57 provided at the rear portion of the movable valve to close the connecting hole 50. A plurality of gas flow grooves 58 are provided on the peripheral surface of the movable valve 56, and a ring 59b is provided at the rear end of a support rod 59a whose front end is locked to a blind hole 59 provided at the rear of the stop valve 57. It is fixed by 51 and the inner end of the connecting cylinder portion 20. Reference numeral 56b is a spring that is urged between the tip 54 and the movable valve.

If a fallen object such as snow falls on the gas release prevention device 9 and the exposed portion 48 a of the insertion cylinder 48 connected to the connecting cylinder portion 20 is thin and has the weakest strength, the valve body 10 Is dropped from the gas container 1, the support rod 59a is also dropped, and the movable valve 56 in the accommodating chamber 49 of the insertion tube 48 is moved by the gas pressure flowing from the communication hole 53a so that the stop valve portion 57 is connected to the connecting hole 50. Close to prevent outgassing. The stop valve portion 57 of this movable valve does not operate unless the insertion cylinder 48 is broken and the support rod 59a falls off, and its structure is extremely simple, so that the cost is low and no failure occurs. When the gas container 1 becomes empty and needs to be replaced, if the connecting body 9a is disconnected from the container valve connecting portion 2a, the gas pressure remaining in the pipe 7 causes the gas to be discharged into the atmosphere through the communication hole 53a. In order to prevent this, the check valve portion 56a of the movable valve advances the accommodation chamber 49 and closes the communication hole 53a at the tip portion, thereby preventing the reverse flow of gas from the pipe 7 side.

The second embodiment shown in FIGS. 7 to 9 will be described. A step portion 62 is formed substantially below a passage 61 provided inside the second valve body 60, and a valve provided at the lower end of the passage 61. An opening 63 is provided, and a lower lid 65 is attached to a lower portion of a valve chamber 64 formed below the valve opening. A guide 67 is inserted into the passage 61, a valve body 67 is inserted into the valve opening 63 so as to be vertically movable, and an o-ring 69 for closing the valve opening 63 is formed at a substantially lower end. The upper end of the valve body is attached to the guide portion 66. Here, an upper small opening 67a and a lower small opening 67b are provided on the upper and lower sides of the valve body 67, and both are connected by a communication hole 67c. On the upper peripheral surface of the valve body 60, there is provided a latching receiving portion 36a formed of a widely formed locking groove or the like, and on one lower portion of the valve body 60, a connecting cylinder portion 73 for connecting a container valve is provided. An insertion cylinder 48 of the gas release prevention device 9 is connected to the connection cylinder portion, and a movable valve 56 is mounted inside. Further, a hole 81 communicating with the passage 61 is formed in a connecting portion 80 for piping provided on the other side of the valve body 60, and a thread groove 82 for connecting a pipe is provided on the inner peripheral surface.

Reference numeral 85 denotes an upper body attached to an upper portion of a passage 61 provided in the second valve body 60 with an O-ring interposed, and a spring groove 87 around an upper end of a shaft hole 86 provided at the center of the upper body. Is provided, and the guide portion 66 is elastically urged downward by interposing a spring 88 on the lower surface of the upper body, but the spring 88 is not always necessary. The lower portion of the operating shaft 90 inserted through the shaft hole 86 of the upper body 85 through the O-ring is inserted into the guide portion 66, and the lower end has the flange portion 91 so as to abut against the back surface of the guide portion 66. To prevent escape and raise the guide 66 together with the operating shaft 90. Since the actuating shaft and the guide portion 66 are not directly connected, only the actuating shaft 90 descends, and when the collar portion 91 of the actuating shaft contacts the upper surface of the valve body 67, the interior 66 is pushed down and the guide portion 66 is depressed. The valve element 67 attached to is lowered. Further, since the shaft spring 93 is mounted between the back surface of the locking projection 92 provided on the upper end of the actuating shaft 90 and the spring groove 87, the actuating shaft 90 is always repulsed upward.

As shown in FIG. 8, the operating shaft 90 is pushed down against the shaft spring 93, and the lower side portion 97 of the latching piece 38 a formed in a substantially U shape is provided on the second valve body 60. When it is hooked on the hook receiving portion 36a and the locking projection 92 provided on the upper end of the operating shaft 90 is locked on the upper side portion 98, the guide portion 66 is provided on the lower portion of the passage 61 as shown in FIG. The valve opening is locked by the stepped portion 62, and the valve opening is closed by an O-ring attached to the lower portion of the valve body 67 inserted through the valve opening 63. Further, a locking projection 92 provided on the upper end of the actuating shaft 90 inserted through the upper part of the guide portion 15 is abutted (FIG. 7). Therefore, the operating shaft 90, which is hooked by the hooking piece 38a attached to the valve body 60, is pushed down within a range in which the lower side portion 97 which is locked to the hooking receiving portion 36a of the second valve body 60 can be moved. be able to. Similar to the first valve body, the window portion 10a is provided on the wall surface of the valve body 60, and the presence or absence of the colored portion 15a provided on the outer periphery of the guide portion 66 is confirmed from the window portion 10 to operate the valve body. You can easily check the status.

In FIGS. 10A and 10B, the transparent body 29 is attached to the window portion 10 a provided on the side wall of the valve body 10 so that the inside can be seen, and the outer peripheral surface of the guide portion 15 accommodated in the passage 11 of the valve body 10. Is provided with a colored portion 15a. In order to return the operating shaft 40 to the ascending return after the push button is pressed down, the shaft spring 45 is elastically urged between the upper body 30 and the operating shaft 40, and the valve port 13 is opened so that the gas is normally supplied. When it is present, the colored portion 15a is not located in the window portion 10a. However, when the pipe 7 is broken or the locking piece 38 such as a locking pin is pulled out from the valve body, the guide shaft 15 having the valve element 16 is pulled up by the operation of the operating shaft 40 which is raised by the shaft spring 45. The valve opening 13 is closed to shut off the gas discharge. In this case, when the guide portion 15 having the valve body 16 rises and the colored portion 15a of the guide portion is located in the window portion 10a, the valve body 16 (67) is closed from the outside of the valve body 10. The condition can be easily confirmed.

When the valve opening 13 is closed by the valve body 16 (67), the valve body 13 is returned to the normal position because the valve opening 13 remains closed due to the gas pressure from the gas container 1. In any case, the valve body 16 does not descend by its own weight, so the valve opening 13 is closed. Therefore, the handle of the container valve 2 is rotated to temporarily stop the outflow of gas from the gas container 1, and then the push button 46 mounted on the upper part of the valve body 10 is pushed down against the shaft spring 45. The lower end of the valve contacts the upper end of the valve element 16 and pushes down the guide portion 15, thereby opening the valve port 13 and then opening the container valve 2 so that it can be used again.

[0016]

[Effect of the Invention] According to the first aspect of the invention, when the locking part such as the locking pin attached to the valve body falls off, the operating shaft rises, and the guide part that locks on the lower part of the operating shaft is pulled up. Therefore, the valve body provided in the guide section closes the valve mouth to prevent the gas from being released, and the valve body also has the function of closing the valve mouth due to the excessive flow of gas caused by the damage to the piping, etc. Is extremely safe to have. According to the second aspect of the invention, since the gas discharge preventing device is attached to the connecting cylinder portion for connecting the container valve of the valve body, when the insertion cylinder is broken, the gas discharge from the gas container can be blocked and prevented. When the hooking piece is disengaged from the valve body, the valve shaft is raised by the actuation of the actuating shaft to close the valve port and prevent gas release. Since it is possible to close the valve port to prevent gas release, it has three functions and is extremely safe. According to the invention of claim 3, the shape of the locking pin for locking the operating shaft for operating the guide portion to which the valve body is attached is small and lightweight, and the structure is simple. Therefore, when the locking pin is pulled out, It can be actuated by a spring to reliably close the valve opening and prevent gas release. By confirming the presence or absence of the colored portion provided in the guide portion having the valve body from the window provided on the wall surface of the valve body, it is possible to easily confirm the open / closed state of the valve body from the outside. It is easy to use and can perform piping work efficiently.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a state in which a conventional tension-type gas release prevention device is attached to a gas container.

FIG. 2 is a partially cutaway side view of the tension type gas release preventing device of the present invention mounted on a gas container.

FIG. 3 shows the first embodiment of the present invention and is a vertical cross-sectional view of the first valve body with the valve opening opened.

FIG. 4 is a cross-sectional view of main parts taken along the line AA of FIG.

FIG. 5 is a vertical cross-sectional view, partially omitted, showing a state in which a valve port is closed due to a gas overflow according to the first embodiment.

FIG. 6 is a vertical cross-sectional view in which a part of the latching piece is pulled out from the latching receiving portion and the valve port is closed.

FIG. 7 shows a second embodiment and is a vertical cross-sectional view of the second valve body with the valve opening opened.

FIG. 8 is a front view of an essential part showing a state in which the operating shaft is pushed down and hooked by the hooking piece.

FIG. 9 is a cross-sectional view of essential parts in a state in which a hooking piece is disengaged and a valve body closes a valve port.

10A and 10B show an open / closed state of the valve port, in which FIG. 10A shows a valve open state without the colored portion being located in the window portion, and FIG. 10B shows a valve closed state in which the colored portion is located at the window portion. There is.

[Explanation of symbols]

 10 1st valve body 11 Passage 13 Valve mouth 14 Valve chamber 15 Guide part 16 Valve body 20 Connecting cylinder part 25 Connection receiving part 30 Upper body 35 Locking cylinder 36 Locking receiving part 38 Locking part 40 Operating shaft 42 Tsuba Part 44 Locking flange 45 Axial spring 46 Push button 47 Locking flange part 48 Inserting cylinder 49 Storage chamber 50 Connecting hole 53 Inserting flange part 53a Communication through hole 53b Spring 54 Tip part 55 Oring 56 Movable valve 56a Check valve part 57 Stop valve portion 58 Gas distribution groove 59a Support rod 60 Second valve body 63 Valve opening 66 Guide portion 67 Valve body 71 Locking groove portion 80 Connection portion 92 Locking collar body 93 Shaft spring

Claims (4)

[Scope of utility model registration request] 1. A connecting cylinder portion for connecting a container valve is provided on one side,
A valve having a valve opening formed in a lower portion of a passage provided in a valve body having a connection receiving portion for connecting a pipe on the other side and closing the valve opening in a valve chamber provided below the valve opening with a gas flow rate of a certain amount or more. A guide portion including a body is arranged in the passage so as to be vertically movable, and is vertically movably inserted through the center of an upper body attached to the upper portion of the valve body, and is attached to a lower end of an operating shaft having a push button on the upper portion. A hook for locking with a locking flange of the operating shaft, which is provided with a guide part and a locking part for locking and lowers against a shaft spring elastically springed between the locking flange provided on the operating shaft and the upper body. The stopper portion is detachably hooked to a hook receiving portion provided on the valve body, and the guide portion is engaged with the operating shaft that is lifted by the elastic force of the shaft spring when the hook portion is detached. A tension type gas release prevention device characterized in that a valve body closes a valve opening. 2. A connecting hole is provided up to the rear end inside a housing chamber provided inside the distal end of an insertion cylinder having a locking flange on the outer periphery of the distal end, and an insertion flange is provided on the outer periphery of the distal end to communicate internally. The tip end portion provided with is attached to the tip end of the insertion cylinder, an O-ring is attached between the insertion flange portion and the locking flange portion, and the check hole for closing the communication hole is provided in the accommodation chamber of the insertion cylinder. A movable valve having a valve part in the front part and a stop valve part in the rear part that closes the connecting hole is housed so as to be movable back and forth, a spring is arranged in front of the movable valve, and a gas flow groove is provided on the peripheral surface. Also, the rear end of the movable valve is fixed to the rear end of the support rod whose front end is locked between the rear part of the insertion cylinder and the connecting cylinder part provided on one side of the valve main body. And a valve body provided below the valve opening formed in the lower part of the passage to close the valve opening by a gas flow rate above a certain level. A guide part is arranged in the passage so as to be vertically movable, and is vertically movably inserted through the center of an upper body attached to the upper part of the valve body, and the lower end of an operating shaft having a push button on the upper part is inserted through the guide part. The lower end of the operating shaft is provided with a brim that engages with the guide, and the operating shaft that is lowered against the axial spring elastically springed between the upper body and the locking flange provided on the upper part of the operating shaft. The valve body of the guide portion, which is configured to detachably engage the retaining piece that is attached to the retaining body provided on the valve body, and which is retained by the operating shaft that is raised by the shaft spring when the retaining piece is detached. A tension type gas release prevention device characterized in that the valve port is closed by means of. 3. A lower end of an actuating shaft having a push button at the upper end thereof is inserted into a guide portion, and the lower end of the actuating shaft is inserted through a hole provided at the center of an upper body attached to the upper portion of the valve body, and the guide portion is provided at the lower end of the actuating shaft. A flange is provided to lock the shaft spring between the operating shaft and the upper body, and a pin hole is provided in the locking cylinder attached to the upper body to compress and push down the shaft spring. The tension type gas release prevention device according to claim 1 or 2, wherein an engagement pin for engaging with an engagement flange of the actuating shaft is detachably attached to the pin hole. 4. A window portion is provided on a wall surface of the valve body, and a colored portion is formed on an outer periphery of a guide portion having a valve body so as to be vertically movable in a passage of the valve body. The tension type gas release prevention device according to claim 1, wherein the presence or absence of the colored portion can be confirmed.