Explosion-proof high-pressure gas connecting pipe

Abstract

The utility model relates to an anti-explosion high-pressure gas connecting pipe. The technical problem that an existing gas pipe is unreasonable in design is solved. The anti-explosion high-pressure gas connecting pipe comprises a connector pipe, a gas inlet pipe, a gas outlet pipe, a gas outlet pipe, a gas inlet pipe and a gas outlet pipe, one end of the joint cap is embedded into the end part of the joint pipe and is in threaded connection with the inner wall of the joint pipe, and a gas inlet communicated with the gas channel is formed in the joint cap; the T-shaped pad comprises a barrel-shaped part arranged on the inner side of the gas inlet and an annular convex shoulder which is arranged on the circumferential outer side of the barrel-shaped part and is arranged on the inner wall of the joint pipe and the extending end of the joint cap in a limited manner; the adjusting core is arranged in the axial direction of the gas channel in a displacement mode, the two ends of the adjusting core can seal the gas outlet pipe and the cylindrical part respectively, and an elastic piece acting on the adjusting core is arranged in the gas channel. According to the anti-explosion high-pressure gas connecting pipe, the safety problems such as explosion caused by leakage are solved, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of gas pipe, and relates to a high-pressure gas connecting pipe. BACKGROUND

[0002] For example, the Chinese patent document discloses an explosion-proof pipe joint for flammable gas pipeline [202420914365.4], which comprises a connecting pipe, flanges connected to both ends of the connecting pipe, and an adjustable pressure balance structure on the side wall of the connecting pipe; the adjustable pressure balance structure comprises a pressure relief connecting pipe connected to the side wall of the connecting pipe, a fixed adapter pipe connected to the side wall of the pressure relief connecting pipe, a tapered piston connected in the inner cavity of the fixed adapter pipe and located on the end face of the pressure relief connecting pipe, a return spring connected to the end face of the tapered piston, a movable piston connected to the end face of the return spring and located in the inner cavity of the fixed adapter pipe, and an adjusting bolt connected to the end face of the movable piston.

[0003] The defect of the above technical solution is that it only adjusts the overall gas pressure in the pipe, and cannot perform segmented adjustment when one end leaks, which may cause explosion and other safety problems during high-pressure gas transportation. UTILITY MODEL CONTENT

[0004] The utility model aims at the above problems existing in the prior art and provides a high-pressure gas connecting pipe.

[0005] The utility model can be realized by the following technical solutions:

[0006] The high-pressure gas connecting pipe comprises:

[0007] A joint pipe has an axial gas passage, and one end of the joint pipe is provided with a gas outlet pipe;

[0008] A joint cap is embedded into the end of the joint pipe and is threadedly connected with the inner wall of the joint pipe, and the joint cap is internally provided with a gas inlet communicated with the gas passage;

[0009] A T-shaped gasket comprises a cylindrical portion arranged on the inner side of the gas inlet, and an annular shoulder arranged on the circumferential outer side of the cylindrical portion and limitedly arranged on the inner wall of the joint pipe and the extended end of the joint cap;

[0010] An adjusting core is arranged in axial displacement along the gas passage, both ends of the adjusting core can respectively close the gas outlet pipe and the cylindrical portion, and an elastic member acting on the adjusting core is arranged in the gas passage.

[0011] Further, the inner wall of the gas inlet is provided with a radially protruding limiting shoulder, the inner diameter of the cylindrical portion is not less than the inner diameter of the limiting shoulder, and the circumferential outer wall of the cylindrical portion and the inner wall of the joint cap and the end of the cylindrical portion and the end of the limiting shoulder are all provided with deformable gaps in communication with each other.

[0012] Further, the end of the joint pipe close to the joint cap is provided with a wide-diameter internal thread with a larger inner diameter than the gas passage, and a positioning step is formed between the wide-diameter internal thread and the gas passage, and the port of the joint pipe close to the wide-diameter internal thread is provided with a recessed mounting groove.

[0013] Further, the joint cap includes an external thread section extending into the wide-diameter internal thread, a mounting shoulder corresponding to the mounting groove and flush with the end surface of the joint pipe, and a port cap section provided on the side of the mounting shoulder away from the external thread section.

[0014] Further, one end of the joint cap is provided with an arc-shaped interface pad sleeved on the outside of the port cap section, the outer diameter of the arc-shaped interface pad close to the joint pipe is larger than the radial outer diameter of the mounting shoulder, and the axial length of the arc-shaped interface pad is greater than the axial length of the port cap section.

[0015] Further, the adjusting core includes a guide portion protruding in the middle and having an outer wall close to the inner wall of the gas passage, a gap is provided on the outer wall of the guide portion, and a plug end is provided at both ends of the guide portion to act on the cylindrical portion and the gas outlet pipe, respectively.

[0016] Further, the end of the plug end is provided with an annular abutting inclined surface.

[0017] Further, an auxiliary connecting sleeve is sleeved on the outside of the joint pipe, and the circumferential outer wall of the joint pipe close to the joint cap is provided with an anti-escape protrusion limiting the axial movement of the auxiliary connecting sleeve.

[0018] Further, at least two sliding rings adapted to the joint pipe are spaced apart on the inner wall of the auxiliary connecting sleeve, a fastening thread is provided on the end of the outer wall of the auxiliary connecting sleeve close to the joint cap, and a screw ring is provided on the outer wall of the auxiliary connecting sleeve.

[0019] Further, a plurality of tapered rib rings are spaced apart on the circumferential outer wall of the gas outlet pipe, and the outer diameter of the tapered rib rings gradually decreases axially outward.

[0020] Compared with the prior art, the anti-explosion high-pressure gas connecting pipe can effectively adjust the pressure difference at both ends of the gas connecting pipe through the guiding movement of the adjusting core in the gas passage and the cooperation with the T-shaped pad, prevent safety problems such as explosion caused by leakage, and the structure of the T-shaped pad can realize soft sealing and play a contact buffering role, compared with the conventional annular pad structure, the deformation amount is reduced, the extrusion fracture damage is prevented, and the service life is improved. Attached Figure Description

[0021] Figure 1 A schematic diagram of an explosion-proof high-pressure gas connection pipe provided by this utility model.

[0022] Figure 2 for Figure 1 A schematic diagram of the connection cross-section of an explosion-proof high-pressure gas connection pipe.

[0023] Figure 3 for Figure 2 An enlarged schematic diagram of area A of the explosion-proof high-pressure gas connection pipe.

[0024] Figure 4 for Figure 1 A schematic diagram of the regulating core of the explosion-proof high-pressure gas connection pipe.

[0025] Figure 5 for Figure 1 A schematic diagram of the elastic element in an explosion-proof high-pressure gas connection pipe. Figure 1 .

[0026] Figure 6 for Figure 1 A schematic diagram of the elastic element in an explosion-proof high-pressure gas connection pipe. Figure 2 .

[0027] In the diagram, 10 is the connector pipe; 11 is the gas passage; 12 is the wide-diameter internal threaded hole; 13 is the positioning step; 14 is the mounting groove; 15 is the anti-detachment protrusion; 20 is the gas outlet pipe; 21 is the conical rib ring; 30 is the connector cap; 31 is the gas inlet; 32 is the limiting shoulder; 33 is the deformable gap; 34 is the external thread section; 35 is the mounting shoulder; 36 is the port cap section; 40 is the T-shaped pad; 41 is the cylindrical part; 42 is the annular shoulder; 50 is the adjusting core; 51 is the guide part; 52 is the clearance notch; 53 is the plug end; 54 is the annular abutment slope; 60 is the elastic element; 61 is the elastic ring; 62 is the elastic rib; 63 is the internal skeleton; 64 is the filter element; 65 is the compression spring; 70 is the arc-shaped interface pad; 80 is the auxiliary connecting sleeve; 81 is the sliding ring; 82 is the fastening thread; and 83 is the screw ring. Detailed Implementation

[0028] Please see Figures 1 to 3 This is a schematic diagram of an explosion-proof high-pressure gas connection pipe provided by this utility model. The explosion-proof high-pressure gas connection pipe includes: a connector pipe 10, a connector cap 30 disposed at one end of the connector pipe 10, a T-shaped gasket 40 disposed inside the connector pipe 10, and an adjusting core 50. It can be imagined that this explosion-proof high-pressure gas connection pipe also includes other functional components and specific structures, such as an inlet pipe, an outlet pipe 20, and an installation structure, etc., which are all technologies known to those skilled in the art, and therefore will not be described in detail here.

[0029] In the embodiment, the joint pipe 10 is a circular pipe body, and has an axially arranged gas passage 11 inside the joint pipe 10. An air outlet pipe 20 is arranged at one end of the joint pipe 10, and has a thin outer diameter structure. A plurality of tapered rib rings 21 are arranged at the outer wall of the air outlet pipe 20 in a spaced manner. The outer diameter of the tapered rib ring 21 gradually decreases axially outward. The tapered rib ring 21 forms a plurality of convex strips on the outer wall of the air outlet pipe 20, which facilitates the sleeving of the rubber gas pipe. After the air outlet pipe end is tightened by a steel ring, the rubber gas pipe can be clamped. Alternatively, an elastic buckle is arranged at the end of the rubber gas pipe, and the rubber gas pipe is directly sleeved on the air outlet pipe 20. The same sealing connection mode of the rubber gas pipe can be achieved. At the same time, the inner diameter of the air outlet pipe 20 is smaller than the inner diameter of the gas passage 11, which is beneficial to the adjustment of the movement of the core 50 along the gas passage 11 to completely block one end of the air outlet pipe 20.

[0030] In the embodiment, the joint pipe 10 is a circular pipe body, and has an axially arranged gas passage 11 inside the joint pipe 10. An air outlet pipe 20 is arranged at one end of the joint pipe 10, and has a thin outer diameter structure. A plurality of tapered rib rings 21 are arranged at the outer wall of the air outlet pipe 20 in a spaced manner. The outer diameter of the tapered rib ring 21 gradually decreases axially outward. The tapered rib ring 21 forms a plurality of convex strips on the outer wall of the air outlet pipe 20, which facilitates the sleeving of the rubber gas pipe. After the air outlet pipe end is tightened by a steel ring, the rubber gas pipe can be clamped. Alternatively, an elastic buckle is arranged at the end of the rubber gas pipe, and the rubber gas pipe is directly sleeved on the air outlet pipe 20. The same sealing connection mode of the rubber gas pipe can be achieved. At the same time, the inner diameter of the air outlet pipe 20 is smaller than the inner diameter of the gas passage 11, which is beneficial to the adjustment of the movement of the core 50 along the gas passage 11 to completely block one end of the air outlet pipe 20.

[0031] In the embodiment, one end of the joint cap 30 is an air inlet end, and is embedded into the end of the joint pipe 10 away from the air outlet pipe 20. The joint cap 30 is threadedly connected with the inner wall of the joint pipe 10. The joint cap 30 is also a cylindrical structure. An air inlet 31 is arranged inside the joint cap 30 and is in communication with the gas passage 11. The conventional gas flow direction is from the joint cap 30, through the gas passage 11, and out of the air outlet pipe 20. The inner diameter of the air inlet 31 is usually smaller than the inner diameter of the gas passage 11, which is beneficial to the arrangement of the core 50. Specifically, the joint cap 30 includes an external thread segment 34 extending into the wide-diameter internal thread hole 12. The joint cap 30 is screwed into the end of the joint pipe 10. The wide-diameter internal thread hole 12 is threadedly connected with the external thread segment 34. An installation shoulder 35 is arranged on the outer wall of the joint cap 30 and is embedded into the installation groove 14. The installation shoulder 35 prevents the joint cap 30 from being excessively embedded. An installation space is reserved between the embedded end of the joint cap 30 and the positioning step 13. The outer side end surface of the installed installation shoulder 35 is flush with the end surface of the joint pipe 10, which ensures the flatness of the external structure and facilitates the subsequent sealing arrangement of the arc-shaped interface pad 70. A port cap segment 36 is arranged on the side of the installation shoulder 35 away from the external thread segment 34. The port cap segment 36 serves as an exposed air inlet interface end, which facilitates the internal communication of the air inlet pipe and is also beneficial to the screwing of the air inlet pipe. Optimally, the inner hole structure of the port cap segment 36 is hexagonal, so that a hexagonal wrench can be used to tighten and unscrew the joint cap 30, thereby avoiding the wear problem caused by clamping on the port cap segment 36.

[0032] In the embodiment, one end of the joint cap 30 is provided with an arc-shaped interface pad 70 sleeved outside the port cap segment 36, the outer wall of the port cap segment 36 has a stepped structure, the contact area of the arc-shaped interface pad 70 is increased, and the difficulty of disengagement is increased, and the port of the arc-shaped interface pad 70 abuts against the mounting shoulder 35 and the end face of the joint pipe 10, and the outer diameter of one end of the arc-shaped interface pad 70 close to the joint pipe 10 is greater than the radial outer diameter of the mounting shoulder 35, and the sealing of the joint pipe 10 and the outside connection end of the joint cap 30 is realized through the arc-shaped interface pad 70. Moreover, the axial length of the arc-shaped interface pad 70 is greater than the axial length of the port cap segment 36, so that the air inlet of the externally connected air inlet pipe is tightly connected with the arc-shaped interface pad 70, and the sealing performance of the air inlet end is improved. An auxiliary connecting sleeve 80 is sleeved outside the joint pipe 10, and the circumferential outer wall of one end of the joint pipe 10 close to the joint cap 30 is provided with an anti-disengagement convex portion 15 for limiting the axial movement of the auxiliary connecting sleeve 80, the auxiliary connecting sleeve 80 is used for locking the outside of the externally connected air inlet pipe, and the anti-disengagement convex portion 15 serves as a fixed fulcrum of the auxiliary connecting sleeve 80 outside the joint pipe 10. Specifically, at least two sliding rings 81 adapted to the joint pipe 10 are arranged at intervals on the inner wall of the auxiliary connecting sleeve 80, the sliding rings 81 reduce the contact area of the auxiliary connecting sleeve 80 and the joint pipe 10, and facilitate the axial sliding and circumferential rotation of the auxiliary connecting sleeve 80. A fastening thread 82 is arranged on the outer wall of one end of the auxiliary connecting sleeve 80 close to the joint cap 30, usually, a joint end of the air inlet pipe is provided with a screw cap portion, the screw cap portion is sleeved on the auxiliary connecting sleeve 80 and is connected with the fastening thread 82 in a matched mode, when the screw cap portion of the air inlet pipe is connected with the fastening thread 82, the air inlet of the air inlet pipe is connected with the arc-shaped interface pad 70. Moreover, the outer wall of the auxiliary connecting sleeve 80 is provided with a tightening ring 83, the tightening ring 83 serves as an external protruding structure, so that the force point of the outer wall of the auxiliary connecting sleeve 80 is increased, and the tightening of the externally connected air inlet pipe is facilitated.

[0033] In the embodiment, the T-shaped pad 40 is made of high-strength silica gel material and is used for bearing the axial extrusion of the adjusting core 50 and the impact of high-pressure gas, and the arc-shaped interface pad 70 is made of sealing rubber material and is used for bearing the sleeving pressure of the air inlet pipe. The two materials are commercially available materials and are prior art, and details are not described herein. The T-shaped pad 40 includes a cylindrical portion 41 arranged inside the gas inlet 31 and an annular shoulder 42 arranged on the circumferential outer side of the cylindrical portion 41, and the T-shaped pad 40 is pre-installed in the joint pipe 10. When the joint cap 30 is screwed in, the annular shoulder 42 of the T-shaped pad 40 is extruded and limited to be arranged on the inner wall of the joint pipe 10 and the joint cap 30, so that the joint pipe 10 and the inside connection end of the joint cap 30 are sealed. The cylindrical portion 41 serves as the contact end of the adjusting core 50 in the gas inlet 31, the inner wall of the gas inlet 31 is provided with a radially protruding limiting shoulder 32, and the inner diameter of the cylindrical portion 41 is not less than the inner diameter of the limiting shoulder 32. This structure forms an internal partition, avoids the deformation and elastic failure of the T-shaped pad 40 caused by the long-term direct impact of high-pressure gas flowing through the joint pipe 10.

[0034] The structure of the T-shaped gasket 40 can realize soft sealing while playing a role of contact buffering, compared with the conventional ring-shaped gasket structure, the structural strength is increased, the deformation amount is reduced, and the extrusion fracture damage is prevented. Optimally, the circumferential outer wall of the cylindrical portion 41 and the inner wall of the outer threaded segment 34 and the end of the cylindrical portion 41 and the end of the limiting shoulder 32 are provided with deformable gaps 33 that are in communication with each other, the deformable gaps 33 make the T-shaped gasket 40 deform into two segments, increase the one-segment deformation process of the cylindrical portion 41 of the T-shaped gasket 40 to the inner wall of the gas inlet 31, cooperate with the two-segment extrusion deformation of itself, reduce the two-segment extrusion deformation amount of itself, and improve the service life. In addition, the deformable gap 33 and the limiting shoulder 32 form an independent chamber, when the adjusting core 50 is blocked in the cylindrical portion 41 of the T-shaped gasket 40, the high-pressure gas enters the deformable gap 33 and acts on the T-shaped gasket 40 to increase the second stress point of the adjusting core 50, facilitating the forward pushing of the adjusting core 50 to achieve self-recovery after one-way blocking.

[0035] Please refer to Figures 2 to 4 In the embodiment, the adjusting core 50 is arranged to displace axially along the gas passage 11, and the two ends of the adjusting core 50 can block the pipe of the gas outlet pipe 20 and the cylindrical portion 41, respectively. Specifically, the adjusting core 50 includes a guide portion 51 protruding in the middle and having an outer wall close to the inner wall of the gas passage 11, the maximum outer diameter of the guide portion 51 is close to the inner diameter of the gas passage 11 to form a movement guide of the adjusting core 50 in the gas passage 11, a gap 52 is arranged on the outer wall of the guide portion 51 to ensure the gas flow in the gas passage 11, and a plug end 53 is arranged at the two ends of the guide portion 51 to act on the cylindrical portion 41 and the gas outlet pipe 20, respectively. The outer diameter of the plug end 53 is smaller, and corresponds to the joint points of the cylindrical portion 41 and the gas outlet pipe 20 and the gas passage 11. The end of the plug end 53 is provided with an annular abutting bevel 54, which reduces the contact area of the plug end 53 and the cylindrical portion 41 and the gas outlet pipe 20, has good sealing performance, and is also beneficial to the gas drilling in the self-recovery process. An elastic member 60 is arranged in the gas passage 11 and acts on the adjusting core 50, in the embodiment, the elastic member 60 is a tower spring, which is sleeved outside the adjusting core 50 and acts on the guide portion 51 and the inner wall of the gas passage 11 close to the gas outlet pipe 20. The elasticity of the tower spring is used as a threshold value for the movement of the adjusting core 50, when the unilateral gas pressure is greater than the set threshold value, the tower spring can be compressed or stretched, the displacement of the adjusting core 50 is realized, and the pressure regulation in the gas passage 11 is realized.

[0036] Please refer to Figure 5In other embodiments, the elastic member 60 can also be sleeved outside the adjusting core 50 as an elastic ring 61, and the elastic ring 61 is connected with the T-shaped pad 40 through an elastic rib 62, and the axial displacement of the adjusting core 50 is realized through the deformation of the elastic rib 62. Similarly, the elasticity of the elastic rib 62 is used as the threshold of the movement of the adjusting core 50, and the pressure adjustment in the gas passage 11 is realized in cooperation.

[0037] Please refer to Figure 6 In other embodiments, the elastic member 60 can also be made into a unified built-in skeleton 63, the built-in skeleton 63 is surrounded by a filter core 64 structure to ensure the flow, the adjusting core 50 is limited in the inner circle of the built-in skeleton 63 to ensure the movement guide, and the compression spring 65 structure acting on both sides of the adjusting core 50 forms the self-recovery of the instantaneous gas pressure change.

[0038] It should be noted that the joint pipe 10 and the gas outlet pipe 20 are integrated, and the detachable setting of the joint cap 30 facilitates the maintenance and replacement of the T-shaped pad 40, the adjusting core 50 and the elastic member 60 in the later period. The adjusting core 50 and the gas outlet pipe 20 at one end are hard contact sealing, which keeps the micro gas flowing out in the positive direction, which is beneficial to the self-recovery in the later period.

[0039] The adjusting core 50 adjusts the working principle: when the gas outlet pipe 20 at one end and the external pipeline leak, the pressure at one end of the gas inlet 31 is much larger than the pressure of the gas outlet pipe 20, the adjusting core 50 is pushed to close the one end of the gas outlet pipe 20, due to the hard contact sealing, the micro gas flows out and there is no safety hazard, avoiding the explosion problem of the one end of the gas outlet pipe 20, at the same time, cooperating with the alarm device can know the leakage situation in the first time, after solving the leakage problem of the gas outlet pipe 20 and after a period of time, the pressure at one end of the gas outlet pipe 20 recovers to the same pressure value of the gas inlet 31, the adjusting core 50 restores to move to the middle to keep normal flow, and when the pressure at one end of the gas outlet pipe 20 is greater than the pressure at one end of the gas inlet 31, the adjusting core 50 is pushed to close in the position of the cylindrical part 41 of the T-shaped pad 40, the soft sealing avoids the reverse leakage of the gas, and realizes the one-way restriction of the gas connection pipe. Through the guided movement of the adjusting core 50 in the gas passage 11 and the cooperation with the T-shaped pad 40, the pressure difference between the two ends of the gas connection pipe can be effectively adjusted, and the safety problems such as explosion caused by leakage can be prevented.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or use similar ways to replace them, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. An explosion-proof high-pressure gas connection pipe, characterized in that, include: The connector tube (10) has an axially arranged gas channel (11) inside, and one end of the connector tube (10) is provided with an outlet pipe (20). The connector cap (30) is embedded at one end into the end of the connector tube (10) and threaded to the inner wall of the connector tube (10). The connector cap (30) has a gas inlet (31) inside that communicates with the gas channel (11). The T-shaped pad (40) includes a cylindrical portion (41) disposed inside the gas inlet (31) and an annular shoulder (42) disposed on the outer side of the cylindrical portion (41) and limited to the inner wall of the connector tube (10) and the insertion end of the connector cap (30). An adjusting core (50) is disposed axially along the gas channel (11). The two ends of the adjusting core (50) can respectively close the gas outlet pipe (20) and the cylindrical part (41), and an elastic element (60) acting on the adjusting core (50) is provided in the gas channel (11).

2. The explosion-proof high-pressure gas connection pipe according to claim 1, characterized in that, The inner wall of the gas inlet (31) is provided with a radially protruding limiting shoulder (32). The inner diameter of the cylindrical part (41) is not less than the inner diameter of the limiting shoulder (32). The circumferential outer wall of the cylindrical part (41) and the inner wall of the connector cap (30) and the end of the cylindrical part (41) and the end of the limiting shoulder (32) are provided with deformable gaps (33) that communicate with each other.

3. The explosion-proof high-pressure gas connection pipe according to claim 2, characterized in that, The connector tube (10) has a wide-diameter internal threaded hole (12) with an inner diameter larger than that of the gas channel (11) at one end near the connector cap (30), and a positioning step (13) is formed between the wide-diameter internal threaded hole (12) and the gas channel (11). The connector tube (10) has a recessed mounting groove (14) at the port near the wide-diameter internal threaded hole (12).

4. The explosion-proof high-pressure gas connection pipe according to claim 3, characterized in that, The connector cap (30) includes an external thread section (34) that extends into the wide-diameter internal threaded hole (12), a mounting shoulder (35) that is embedded in the mounting groove (14) and flush with the end face of the connector tube (10), and a port cap section (36) disposed on the side of the mounting shoulder (35) away from the external thread section (34).

5. The explosion-proof high-pressure gas connection pipe according to claim 4, characterized in that, One end of the connector cap (30) is provided with an arc-shaped interface pad (70) that is sleeved on the outside of the port cap section (36). The outer diameter of the arc-shaped interface pad (70) near the connector tube (10) is greater than the radial outer diameter of the mounting shoulder (35), and the axial length of the arc-shaped interface pad (70) is greater than the axial length of the port cap section (36).

6. The explosion-proof high-pressure gas connection pipe according to claim 1, characterized in that, The regulating core (50) includes a guide portion (51) that protrudes in the middle and whose outer wall is close to the inner wall of the gas channel (11). A clearance notch (52) is provided on the outer wall of the guide portion (51). At both ends of the guide portion (51) are plug ends (53) that act on the cylindrical portion (41) and the gas outlet pipe (20) respectively.

7. The explosion-proof high-pressure gas connection pipe according to claim 6, characterized in that, The end of the plug (53) is provided with an annular abutment slope (54).

8. The explosion-proof high-pressure gas connection pipe according to claim 1, characterized in that, An auxiliary connecting sleeve (80) is sleeved on the outside of the connector tube (10), and an anti-detachment protrusion (15) is provided on the circumferential outer wall of the connector tube (10) near the connector cap (30) to restrict the axial movement of the auxiliary connecting sleeve (80).

9. The explosion-proof high-pressure gas connection pipe according to claim 8, characterized in that, The inner wall of the auxiliary connecting sleeve (80) is provided with at least two sliding rings (81) that are adapted to the connector tube (10). The outer wall of the auxiliary connecting sleeve (80) is provided with a fastening thread (82) at one end near the connector cap (30). The outer wall of the auxiliary connecting sleeve (80) is provided with a screw ring (83).

10. The explosion-proof high-pressure gas connection pipe according to claim 8, characterized in that, The outer circumferential wall of the air outlet pipe (20) is provided with a number of conical ribs (21) at intervals, and the outer diameter of the conical ribs (21) gradually decreases outward in the axial direction.

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