CN217272778U - Safe diffusion system of gas pipeline - Google Patents

Abstract

The utility model discloses a safe system of diffusing of gas pipeline relates to gas transmission and distribution technical field, aims at solving the problem that there is the potential safety hazard in the gas diffusion of present gas conveying pipeline, and its technical scheme main points are: including diffusing valve, back-fire relief valve, diffusing pipe, communicating pipe one and communicating pipe two, diffusing valve connects at main gas-supply pipe through communicating pipe one, diffuses through communicating pipe two intercommunications between valve and the back-fire relief valve, diffuses union coupling on the back-fire relief valve. The utility model discloses a cooperation between valve, back-fire relief valve and the diffuse pipe of diffusing can realize that the dimension of gas conveying line is pressed, when gas pressure is too big, can realize diffusing of gas, improves the transmission and distribution security of gas.

Description

Safe diffusion system of gas pipeline

Technical Field

The utility model relates to a gas transmission and distribution technical field, more specifically say, it relates to a safe system of diffusing of gas pipeline.

Background

In a pipeline gas transmission and distribution pipeline system, the overall stable state of pressure needs to be maintained, gas is supplied to a gas input end transmission and distribution pipeline, certain transmission pressure is formed in the transmission and distribution pipeline, and the gas is transmitted and supplied to the tail end of the transmission and distribution pipeline, namely a user end, through the pressure.

In the use process, the distribution pipeline system is influenced by various external environmental factors, the pressure in the distribution pipeline system may exceed the allowable maximum pressure, and in order to ensure the safety, the gas in the gas pipeline system needs to be discharged and decompressed to maintain the stable pressure of the distribution pipeline system. However, the existing transmission and distribution pipelines are easily affected by external factors in the process of discharging the gas pressure, and may cause a situation of blasting, so that the existing transmission and distribution pipelines have great danger.

Therefore, a new solution is needed to solve this problem.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve above-mentioned problem and provide a safe system of diffusing of gas pipeline, through diffuse valve, back-fire relief valve and diffuse the cooperation between the pipe, can realize that gas conveying line's dimension is pressed, when gas pressure is too big, can realize diffusing of gas, improve the transmission and distribution security of gas.

The above technical purpose of the present invention can be achieved by the following technical solutions: a safe diffusion system of a gas pipeline comprises a diffusion valve, a fire retardant valve, a diffusion pipe, a first communicating pipe and a second communicating pipe, wherein the diffusion valve is connected with a main gas pipe through the first communicating pipe; the first communicating pipe is provided with an on-off valve; the diffuser tube includes an upwardly extending diffuser end for diffusing the combustion gases to an environment remote from the floor.

The utility model discloses further set up to, the end of diffusing pipe is served and is covered and establish the cap of diffusing, a plurality of holes of diffusing are seted up corresponding to the inboard of cap of diffusing to the end of diffusing, and the lower border of cap of diffusing is less than the hole of diffusing.

The utility model discloses further set up to, the cap of diffusing is provided with the mouth of diffusing down, and the downside of the mouth of diffusing sets up the baffle, the periphery profile of baffle is greater than the periphery profile of the cap of diffusing.

The utility model is further provided with a fire-retardant cavity arranged in the fire-retardant valve, the two ends of the fire-retardant cavity are respectively provided with interfaces, a plurality of layers of fire-retardant valve cores are arranged in the fire-retardant cavity, and the interfaces at the two ends are separated by the fire-retardant valve cores; a plurality of tunnel holes which are communicated towards the interfaces at the two ends are formed in the fire-retardant valve core; and the tunnel holes of the adjacent fire-retardant valve cores are staggered, and a gap is formed between the adjacent fire-retardant valve cores.

The utility model is further provided with that the fire retardant valve comprises two half valves which are connected by a fastener and sealed by a sealing gasket; two interfaces of the fire retardant valve are respectively arranged on the two half valves.

The utility model discloses set up further as, the bleeding valve includes valve body, valve gap, diaphragm, valve body and valve gap lid close and form the valve pocket, the diaphragm clamping is between valve body and lid, and will the valve pocket separates, set up air inlet and gas outlet that are used for communicating the valve pocket on valve body and the valve gap respectively; the bottom of the valve body protrudes towards the diaphragm to form a closed supporting cylinder, one end of the supporting cylinder, which faces towards the diaphragm, is provided with a valve port convex ring, the valve port convex ring is used for being pressed and sealed with the diaphragm, and a through hole is formed in the inner side of the pressing position of the diaphragm and the valve port convex ring; the side of the diaphragm, which is back to the support cylinder, is provided with a bearing disc, a gland and a spring, the bearing disc is overlapped with the diaphragm, the spring elastically supports against the space between the gland and the bearing disc, and the distance between the gland and the valve port convex ring is adjustable.

The utility model discloses further set up to, fixedly connected with adjusts a section of thick bamboo in the middle of the support section of thick bamboo, set up the guide bar in the regulation section of thick bamboo, the one end of guide bar runs through diaphragm, bearing plate and is fixed with the depression bar, and the valve pocket is stretched out to the other end to threaded connection has adjusting nut, it is sealed through the sealing washer realization between a regulation section of thick bamboo and the guide bar.

The utility model is further arranged in that a sealing ring is arranged on the inner periphery of the adjusting cylinder, and the guide rod passes through the sealing ring to realize sealing; one end of the guide rod, which faces away from the gland, is matched with the external thread of the adjusting nut, and the adjusting nut is abutted against the outer end of the adjusting cylinder for limiting.

The utility model discloses further set up to, a plurality of runner holes one have been seted up corresponding to the through-hole inboard of diaphragm on the load dish, set up the guiding hole between each runner hole one, guide bar sliding connection is in the guiding hole.

The utility model discloses further set up to, on the periphery of valve body was located to the air inlet, the one end of valve gap dorsad valve body was located to the gas outlet, air inlet and gas outlet mutually perpendicular, communicating pipe one and communicating pipe two are connected respectively to air inlet and gas outlet.

To sum up, the utility model discloses following beneficial effect has:

the equipment is connected to each part of safe diffusion system, forms the diffusion pipeline of connection on main gas-supply pipe, when pressure exceeded the safe value on main gas-supply pipe, realizes automatically diffusing, diffuses the gas in the middle of to safe environment. The bleeding valve is normally closed in a normal state and automatically opened when the pressure is too high, so that the gas pressure can be bled; the fire retardant valve is positioned at the rear end of the bleeding valve, so that the fire retardant function of the internal and external environments is achieved, and the risk of backfire is avoided; the pipe then upwards extends diffuses, can discharge the gas of diffusing as far as possible to the safety ring border of keeping away from ground in the middle of, improves the security that the gas diffuses.

Drawings

Fig. 1 is a schematic structural view of a safety bleeding system of a gas pipeline according to the present invention;

FIG. 2 is a schematic view of the structure of the bleeding valve of the present invention;

FIG. 3 is a schematic structural view of the fire relief valve of the present invention;

fig. 4 is a schematic structural diagram of the diffusing pipe of the present invention.

Reference numerals: 00. a main gas delivery pipe; 1. a first communicating pipe; 2. an on-off valve; 3. a bleeding valve; 31. a valve body; 311. an air inlet; 312. a support cylinder; 313. a valve port convex ring; 314. an adjusting cylinder; 315. a seal ring; 32. a valve cover; 321. an air outlet; 33. a valve cavity; 34. a membrane; 341. a through hole; 342. an outer edge; 35. a force bearing disc; 351. a first flow passage hole; 352. a guide hole; 36. a gland; 361. a second flow passage hole; 37. a spring; 38. a guide bar; 381. an external thread; 39. adjusting the nut; 4. a second communicating pipe; 5. a fire relief valve; 51. a fire-retarding cavity; 52. an interface; 53. a fire retardant valve core; 54. a tunnel bore; 55. a gap; 56. a half valve; 57. a gasket; 6. a diffusing pipe; 61. a dispensing end; 62. a dispensing aperture; 63. a diffusing cap; 64. a dispensing opening; 65. and a baffle plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Please refer to fig. 1, which is a safety bleeding system for a gas pipeline, comprising a bleeding valve 3, a fire retardant valve 5, a bleeding pipe 6, a first communicating pipe 1 and a second communicating pipe 4, wherein the components are connected as shown in fig. 1 to form a bleeding pipe 6 connected to a main gas pipe 00, and bleeding can be automatically realized when the pressure on the main gas pipe 00 exceeds a safety value, so as to bleed the gas into a safe environment.

The bleeding valve 3 is connected to the main gas pipe 00 through a first communicating pipe 1, the bleeding valve 3 is communicated with the fire retardant valve 5 through a second communicating pipe 4, and the bleeding pipe 6 is connected to the fire retardant valve 5; the bleeding valve 3 is normally closed in a normal state and automatically opens when the pressure is too high, so that the gas pressure can be bled; the fire retardant valve 5 is positioned at the rear end of the bleeding valve 3, so that the fire retardant function of the internal and external environments is achieved, and the risk of backfire is avoided; the pipe 6 then upwards extends diffuses, can discharge the gas of diffusing to the safety ring border of keeping away from ground as far as possible in the middle of, improves the security that the gas diffused.

In order to carry out overall control on the whole bleeding system, the on-off valve 2 can be connected to the first communicating pipe 1, and the on-off control can be carried out between the bleeding system and the main conveying pipe through the on-off valve 2.

Referring to fig. 2, the relief valve 3 includes a valve body 31, a valve cover 32, and a diaphragm 34, wherein the valve body 31 and the valve cover 32 cover to form a valve cavity 33, and the valve cavity and the valve cover are mounted by a peripheral flange and a fastening member. The diaphragm 34 is an annular flexible sheet, and the outer edge 342 of the diaphragm 34 is clamped between the valve body 31 and the cover body and can divide the valve cavity 33 into two cavities, namely an output side cavity and an input side cavity; the valve body 31 and the valve cover 32 are respectively provided with a gas inlet 311 and a gas outlet 321 which are used for communicating the valve cavity 33, and the gas inlet 311 and the gas outlet 321 are respectively connected with the first communicating pipe 1 and the second communicating pipe 4; during operation, the elastic floating of the diaphragm 34 can realize the on-off switching of two sides of the valve cavity 33, so that the connection and disconnection between the first communication pipe 1 and the second communication pipe 4 are realized.

The bottom of the valve body 31 protrudes toward the diaphragm 34 to form a closed supporting cylinder 312, an inward end of the supporting cylinder 312 is provided with a valve port convex ring 313, the valve port convex ring 313 corresponds to a through hole 341 on the diaphragm 34, and the through hole 341 is located at an inner side position of the valve port convex ring 313. After the diaphragm 34 is elastically deformed towards the direction of the valve port convex ring 313, the diaphragm 34 is abutted against the front of the valve port convex ring 313, and an abutting sealing state is formed between the diaphragm 34 and the valve port convex ring 313, so that the air inlet 311 and the air outlet 321 at two ends of the valve cavity 33 are cut off; after the diaphragm 34 elastically deforms in the direction away from the valve port convex ring 313, the diaphragm 34 and the valve port convex ring 313 are separated, and gas on two sides of the valve cavity 33 can flow through the through hole 341 in the middle of the diaphragm 34, so that the gas inlet 311 and the gas outlet 321 on two ends of the valve cavity 33 can be communicated, and the fuel gas can be diffused.

A bearing disc 35, a gland 36 and a spring 37 are arranged on one side of the diaphragm 34 opposite to the support cylinder 312, wherein the bearing disc 35 and the diaphragm 34 are overlapped, the bearing disc 35 and the diaphragm 34 are tightly attached to each other and keep tight connection, and synchronous lifting and floating can be kept at the connection position; the gland 36 is positioned on one side of the bearing disc 35 far away from the diaphragm 34 and plays a role in supporting the spring 37; the spring 37 elastically presses between the gland 36 and the bearing disc 35, and a pressure can be generated on the diaphragm 34 by the elasticity of the spring 37, so that the diaphragm 34 and the valve port convex ring 313 are pressed against each other, and the sealing between the valve port convex ring 313 and the diaphragm 34 is maintained.

A plurality of first flow passage holes 351 are formed in the bearing disc 35 corresponding to the inner side of the through hole 341 of the diaphragm 34, and the first flow passage holes 351 are distributed annularly and can be used for gas to circulate; the gland 36 is provided with a plurality of second flow passage holes 361, so that gas can smoothly flow from the valve cavity 33.

The position of the gland 36 adopts an adjustable structure, namely, the distance between the gland 36 and the valve port convex ring 313 can be adjusted, the initial compression degree of the pair of springs 37 can be adjusted by adjusting the gland 36, the abutting sealing pressure of the diaphragm 34 is adjusted, and the pressure condition of the automatic opening of the bleeding valve 3 is further adjusted.

An adjusting cylinder 314 is fixedly connected to the middle of the supporting cylinder 312, the adjusting cylinder 314 is integrally formed with the valve body 31 and the supporting cylinder 312, and a guide rod 38 is installed in the adjusting cylinder 314 and can slide and adjust along the adjusting cylinder 314 in the axial direction; a sealing ring 315 is arranged on the inner periphery of the adjusting cylinder 314, and the guide rod 38 passes through the sealing ring 315 to realize sealing, so that the sealing of the valve cavity 33 can be maintained during the telescopic adjustment of the guide rod 38.

The guide rod 38 penetrates through the adjusting cylinder 314, and one end of the guide rod extends into the valve cavity 33, penetrates through the membrane 34 and the pressure bearing disc, and is fixed with the pressure rod to support the gland 36; the other end of the guide rod 38 extends out of the valve cavity 33 and is in threaded connection with an adjusting nut 39, the adjusting nut 39 can be abutted against the outer end of the adjusting cylinder 314 for limiting, the extending of the guide rod 38 can be adjusted by screwing the adjusting nut 39 through threads, the compression condition of the spring 37 can be adjusted, and the pressure of the spring 37 on the diaphragm 34 can be adjusted.

A guide hole 352 is formed in the center of the pressure bearing disc corresponding to the position between the first runner holes 351; the guide rod 38 can pass through the guide hole 352, so that the guide rod 38 can be guided to a certain extent, and the stability of the adjustment process of the guide rod 38 is maintained.

In order to facilitate the installation of 6 routes of the diffusing pipe, the air inlet 311 on the diffusing valve 3 is arranged on the periphery of the valve body 31, the air outlet 321 is arranged at one end of the valve cover 32, which faces away from the valve body 31, the air inlet and the air outlet can be arranged in two directions, and the air inlet 311 and the air outlet 321 can be arranged in a mutually perpendicular state according to the installation situation, so that the pipeline of the gas diffusing system can be connected and assembled more conveniently.

Referring to fig. 3, the fire relief valve 5 is a tubular structure arranged up and down, and a cylindrical fire relief cavity 51 is arranged in the fire relief valve. Interfaces 52 are respectively arranged at two ends of the fire retardant cavity 51, and the two interfaces 52 are respectively connected with the lower communicating pipe II 4 and the upper diffusing pipe 6, so that the gas can smoothly circulate.

The three-layer fire-retardant valve core 53 is arranged in the fire-retardant cavity 51, the fire-retardant valve core 53 separates the interfaces 52 at two ends of the fire-retardant cavity 51, the fire-retardant valve core 53 is densely provided with the tunnel holes 54, the aperture of each tunnel hole 54 is small, and the tunnel holes 54 are communicated towards the interfaces 52 at two ends, so that on one hand, the smoothness of the fire-retardant valve 5 can be kept, and gas can be circulated; on the other hand, the slender tunnel hole 54 can block the tempered spark, the spark is extinguished in the collision process with the inner wall of the tunnel hole 54, the inward circulation is avoided, the tempering is avoided, and the tempering blocking effect is achieved.

The tunnel holes 54 between the adjacent fire-retardant valve cores 53 are staggered, so that the collision probability between the tempering sparks and the walls of the tunnel holes 54 can be increased, the tempering blocking effect is further improved, and the safety of the fire-retardant valve 5 is ensured. Predetermine certain clearance 55 between the adjacent back-fire relief valve core 53, this clearance 55 position forms the room of flying promptly, and the room of flying can form further separation between the back-fire relief valve core 53 of both sides, forms disconnected laminar structure, increases the tortuous nature of circulation between the tunnel hole 54, improves back-fire relief effect of back-fire relief valve core 53. The height of a gap 55 between the fire-retardant valve cores 53 is 0.2-1.5cm, so that the gas can be ensured to circulate, and the tempering prevention effect can be achieved.

Specifically, the fire relief valve 5 is assembled by using two half valves 56, a flange is connected to the edge of the joint of the two half valves 56, the two half valves 56 are fixedly connected by fasteners, and a gasket 57 is installed at the joint, so as to keep the fire relief chamber 51 closed.

Referring to fig. 4, the lower end of the diffusing pipe 6 is connected to the upper port 52 of the fire relief valve 5, and the upper end extends upward to the middle of the high altitude to form a diffusing end 61; the diffusing end 61 is provided with a diffusing hole 62 for gas to pass through, so that the gas can be diffused.

The diffusing cap 63 is covered on the diffusing end 61, the diffusing cap 63 is in a bowl shape and is covered on the diffusing end 61, and the diffusing hole 62 on the diffusing end 61 is covered and arranged, so that the normal diffusion of the diffusing hole 62 is not influenced, the diffusing hole 62 can be shielded, the diffusing hole 62 is prevented from being directly exposed, and the influence of external pollutants and birds can be reduced. The lower edge of the diffusing cap 63 is lower than the diffusing hole 62, and the diffusing cap 63 can shield and protect the diffusing hole 62 to a greater extent.

A bowl-shaped diffusing cap 63 is reversely mounted on the diffusing end 61, a downward diffusing port 64 is formed between the lower end of the diffusing cap 63 and the outer periphery of the diffusing pipe 6, the diffusing ports 64 are annularly distributed, and the outflowing fuel gas is discharged downward from the diffusing port 64. In order to avoid the re-flow of the exhaust gas to the vicinity of the ground, a baffle plate 65 may be attached to the lower side of the exhaust port 64, and the baffle plate 65 may be in an annular shape and fitted around the outer periphery of the exhaust pipe 6, so that the exhaust gas may be blocked and the exhaust gas may be diffused to the outer periphery, thereby improving the safety of the exhaust gas.

The inner periphery of the baffle 65 needs to keep the sealing with the diffusing pipe 6 as much as possible, so that the condition that gas flows downwards from the gap is reduced; and the periphery profile of baffle 65 needs to be greater than the periphery profile of diffusing cap 63 for the gas that flows out downwards from diffusing mouth 64 can both receive the direction that blocks of baffle 65, thereby improves the diffusion water conservancy diversion effect to the diffusion, improves the security that the gas was diffused.

When the diffusion system works, firstly, the on-off valve 2 on the first communicating pipe 1 is opened, and the diffusion pipe 6 is connected to the main conveying pipe; the pressure of the fuel gas enters the bleeding valve 3, and the bleeding valve 3 automatically controls the on-off of the bleeding valve 3 according to the condition between the pressure of the fuel gas and the preset pressure, so that the safe bleeding of the fuel gas is realized.

When the pressure in the main delivery pipe is normal, the pressure of the spring 37 on the diaphragm 34 is greater than the internal pressure of the gas, and under the elastic action of the spring 37, the abutting seal between the diaphragm 34 and the valve port convex ring 313 is maintained, so as to maintain the normally closed state of the relief valve 3.

When the pressure in the main conveying pipe is higher than a preset value, the pressure of the spring 37 cannot maintain the sealing state of the diaphragm 34, the pressure of the gas pushes the diaphragm 34 to float, and the space between the diaphragm 34 and the valve port convex ring 313 is opened for the gas to flow out, so that the automatic diffusion of the gas is realized.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the fan belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The safe diffusion system of the gas pipeline is characterized by comprising a diffusion valve (3), a fire retardant valve (5), a diffusion pipe (6), a first communicating pipe (1) and a second communicating pipe (4), wherein the diffusion valve (3) is connected to a main gas pipe (00) through the first communicating pipe (1), the diffusion valve (3) and the fire retardant valve (5) are communicated through the second communicating pipe (4), and the diffusion pipe (6) is connected to the fire retardant valve (5); the first communicating pipe (1) is provided with a on-off valve (2); the diffuser pipe (6) comprises an upwardly extending diffuser end (61) for diffusing the combustion gases to the environment remote from the floor.

2. The safety diffusing system of a gas pipeline according to claim 1, wherein a diffusing cap (63) is covered on the diffusing end (61) of the diffusing pipe (6), a plurality of diffusing holes (62) are formed on the diffusing end (61) corresponding to the inner side of the diffusing cap (63), and the lower edge of the diffusing cap (63) is lower than the diffusing holes (62).

3. A safety bleeding system for gas lines, as in claim 2, characterized in that the bleeding cap (63) is provided with a downward-directed bleeding opening (64), on the underside of the bleeding opening (64) there being provided a baffle (65), the peripheral profile of the baffle (65) being greater than the peripheral profile of the bleeding cap (63).

4. The safety diffusing system of the gas pipeline as claimed in claim 1, wherein a fire retarding cavity (51) is arranged in the fire retarding valve (5), interfaces (52) are respectively arranged at two ends of the fire retarding cavity (51), a plurality of layers of fire retarding valve cores (53) are arranged in the fire retarding cavity (51), and the interfaces (52) at two ends are separated by the fire retarding valve cores (53); a plurality of tunnel holes (54) which are communicated towards the interfaces (52) at the two ends are formed in the fire retardant valve core (53); the tunnel holes (54) of the adjacent fire retardant valve cores (53) are staggered, and gaps (55) are arranged between the adjacent fire retardant valve cores (53).

5. The safety bleeding system for gas pipelines according to claim 4, characterized in that said fire-retardant valve (5) comprises two half-valves (56), the two half-valves (56) being connected by fasteners and sealed by a gasket (57); two interfaces (52) of the fire retardant valve (5) are respectively arranged on the two half valves (56).

6. The safety bleeding system for a gas pipeline according to claim 1, wherein the bleeding valve (3) comprises a valve body (31), a valve cover (32) and a membrane (34), the valve body (31) and the valve cover (32) are covered to form a valve cavity (33), the membrane (34) is clamped between the valve body (31) and the cover body and separates the valve cavity (33), and the valve body (31) and the valve cover (32) are respectively provided with a gas inlet (311) and a gas outlet (321) for communicating the valve cavity (33); the bottom of the valve body (31) protrudes towards the diaphragm (34) to form a closed supporting cylinder (312), one end, facing the diaphragm (34), of the supporting cylinder (312) is provided with a valve port convex ring (313), the valve port convex ring (313) is used for being in abutting sealing with the diaphragm (34), and a through hole (341) is formed in the inner side of the abutting position of the diaphragm (34) and the valve port convex ring (313); one side of the diaphragm (34) back to the support cylinder (312) is provided with a bearing disc (35), a gland (36) and a spring (37), the bearing disc (35) is overlapped with the diaphragm (34), the spring (37) elastically presses against the space between the gland (36) and the bearing disc (35), and the distance between the gland (36) and the valve port convex ring (313) is adjustable.

7. The safety diffusing system of the gas pipeline according to claim 6, wherein an adjusting cylinder (314) is fixedly connected to the middle of the supporting cylinder (312), a guide rod (38) is arranged in the adjusting cylinder (314), one end of the guide rod (38) penetrates through the membrane (34) and the pressure-bearing disc and is fixed with the pressure rod, the other end of the guide rod extends out of the valve cavity (33), an adjusting nut (39) is in threaded connection, and the adjusting cylinder (314) and the guide rod (38) are sealed through a sealing ring (315).

8. The safety bleeding system for gas lines as claimed in claim 7, wherein the inner circumference of the adjusting cylinder (314) is fitted with a sealing ring (315), the guide rod (38) passing through the sealing ring (315) to effect sealing; one end of the guide rod (38) back to the gland (36) is externally threaded (381) matched with the adjusting nut (39), and the adjusting nut (39) is abutted against the outer end of the adjusting barrel (314) for limiting.

9. The safety diffusing system of a gas pipeline according to claim 7, wherein a plurality of first flow passage holes (351) are formed in the force bearing disc (35) corresponding to the inner sides of the through holes (341) of the membranes (34), guide holes (352) are formed between the first flow passage holes (351), and the guide rods (38) are slidably connected into the guide holes (352).

10. The safety diffusing system of a gas pipeline according to claim 6, wherein the gas inlet (311) is arranged on the outer periphery of the valve body (31), the gas outlet (321) is arranged at one end of the valve cover (32) opposite to the valve body (31), the gas inlet (311) and the gas outlet (321) are perpendicular to each other, and the gas inlet (311) and the gas outlet (321) are respectively connected with the first communicating pipe (1) and the second communicating pipe (4).

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