Double-leakage-proof electric melting pipe fitting for fuel gas and leakage-proof assembly of double-leakage-proof electric melting pipe fitting

Abstract

The invention relates to the technical field of electric melting pipe fittings, and discloses a double-leakage-proof gas electric melting pipe fitting and a leakage-proof assembly thereof.The leakage-proof assembly is used in the double-leakage-proof gas electric melting pipe fitting and comprises an outer pipe and an inner pipe, the inner pipe is arranged in the outer pipe, and four adjusting assemblies arranged in a circumferential mode are arranged on the outer surface of the outer pipe; an air pressure sensor is arranged on the outer surface of the inner pipe, the adjusting assembly comprises an adjusting box, second sliding grooves are formed in the front wall and the rear wall of the adjusting box, a second partition plate is slidably connected between the interiors of the two second sliding grooves, and a third sliding groove is formed in the bottom face of the second partition plate. Through mutual cooperation of a draught fan and an extrusion plate, the air pressure of a gap between the inner pipe and the outer pipe can be increased, the air pressure outside the inner pipe is larger than the air pressure inside the inner pipe, and if the inner pipe is damaged under the action of the air pressure, the situation of gas leakage can be effectively prevented; and the air tightness can be further improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric fusion pipe fittings, and in particular to a double-leakage-proof electric fusion pipe fitting for gas and a leakage-proof component thereof. Background Art

[0002] The basic principle of electric fusion welding of PE pipe fittings and pipes is to heat the electric heating wire embedded in the inner wall of the pipe fitting to make the plastic resin in the fusion zone undergo phase change. The polymer chain segments penetrate and interweave with each other under a certain pressure, and the material is cooled and recrystallized to combine the fusion zone into a solid whole. The leak-proof component refers to a device that can effectively prevent leakage.

[0003] A Chinese patent with announcement number CN112413159A discloses a gas safety valve with an anti-leakage alarm function, comprising a safety valve body, a valve core is movably sleeved in the middle of the inner cavity of the safety valve body, and a sealing ring is provided between the gap between the safety valve body and the valve core, a group of pressure rubber rings are respectively provided in the inner cavity of the safety valve body and on both sides of the valve core, and capillaries are provided inside the two groups of pressure rubber rings, a buzzer is fixedly installed at the bottom end of the safety valve body, a balancing sleeve is fixedly installed at the bottom end of the buzzer, and the other ends of the two groups of capillaries respectively penetrate and extend to both sides of the inner cavity of the balancing sleeve, a sliding core is movably sleeved inside the balancing sleeve, and a group of main contact guide rods and two groups of auxiliary contact guide rods are respectively provided inside the top end of the balancing sleeve, the two groups of auxiliary contact guide rods are respectively located on both sides of the main contact guide rod, and the bottom ends of the main contact guide rod and the auxiliary contact guide rod extend to the inside of the buzzer. When the device leaks, it cannot be used to carry out targeted treatment of the leakage size.

[0004] A Chinese patent with announcement number CN106932043A discloses an anti-leakage intelligent gas meter, including a differential pressure transmitter, a gas flow direction detection tee, a controller inlet pipe 1, inlet pipe 2, and an outlet pipe. The outer end of the inlet pipe 1 is connected to the outdoor gas pipeline, and the inner end of the inlet pipe 1 is split, one end is connected to the inlet port 1 of the differential pressure transmitter and the other end is connected to the original inlet interface of the gas meter; the inner end of the inlet pipe 2 is connected to the inlet port 2 of the differential pressure transmitter; the differential pressure transmitter and the controller are electrically connected; the controller is electrically connected to the stop valve, the base end of the gas flow direction detection tee is connected to the inlet port of the gas equipment, and the other two ports are connected to the inlet pipe 2 and the outlet pipe respectively. When the device leaks, it can only be warned through the alarm, and protection cannot be entered according to the leakage situation. The leaked gas is prone to cause sudden accidents.

[0005] The above-mentioned existing leakage-proof components of the electric fusion pipe fittings are protected by an alarm when in use, and the alarm only serves as a warning reminder and cannot be automatically repaired. Maintenance by staff is still required. However, since the gas inside the pipeline is always flowing, if the sealing method is used for maintenance, when the gas pressure increases, the sealing can be opened again. When it is opened again, the damaged part gradually increases under the action of the gas pressure, and finally makes it impossible to repair. At the same time, the leaked gas cannot be automatically collected, which is easy to cause an accident again. Summary of the invention

[0006] The object of the present invention is to provide a double-leakage-proof electric fusion pipe fitting for gas and a leakage-proof assembly thereof, so as to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a double-leak-proof electric fusion pipe fitting for gas, the leak-proof component is used for the double-leak-proof electric fusion pipe fitting for gas, including a leak-proof component and a protective shell, the protective shell is arranged on the outside of the leak-proof component, the interior of the protective shell is filled with inert gas, a group of second mounting plates arranged in a circumference are provided in the middle of the inner wall of the protective shell, and the other side of each second mounting plate is fixedly connected to the leak-proof component, the middle of the upper surface of the protective shell is connected to an exhaust pipe, and a pressure valve is provided inside the exhaust pipe.

[0008] Preferably, both ends of the protective shell are threadedly connected with terminal heads, a pipe is inserted into the interior of each terminal head, a bellows is provided inside each pipe, and a positioning ring is provided at one end of the two bellows close to each other, and a second rubber ring is provided between the positioning ring and the terminal head.

[0009] The present invention also provides a leak-proof component, which is used in a double-leak-proof gas electric fusion pipe fitting, comprising an outer tube and an inner tube, wherein the inner tube is arranged inside the outer tube, and the outer surface of the outer tube is provided with four circumferentially arranged adjustment components, and the outer surface of the inner tube is provided with a gas pressure sensor; The adjustment assembly comprises an adjustment box, the front and rear walls of the adjustment box are both provided with second slide grooves, a second partition plate is slidably connected between the two second slide grooves, a third slide groove is provided on the bottom surface of the second partition plate, a moving plate is slidably connected inside the third slide groove, and a spring is provided between the moving plate and the third slide groove; A through slot is provided on the bottom surface of the adjustment box, an extrusion plate is slidably connected to the interior of the through slot, and the cross section of the extrusion plate is in the shape of an inverted convex letter, an air inlet is provided on the right side wall of the through slot, and the other end of the air inlet is connected to the adjustment box.

[0010] The adjustment component can make corresponding adjustments according to the leakage of the inner tube. During normal use, the gap between the outer tube and the inner tube is punched to avoid leakage. When the leakage reaches the first threshold, the gas is diverted by dredging to reduce the loss of gas pressure to the inner and outer tubes. When the leakage reaches the second threshold, part of the gas is discharged by pressure relief.

[0011] Preferably, a first slide groove is provided on the upper surface of the adjustment box, a first partition is slidably connected inside the first slide groove, a group of through holes distributed in a rectangular shape are provided in the middle of the first partition, a fan is provided inside each of the through holes, an air intake scoop is provided on the left side of the adjustment box, and a constraint plate is provided on the left side of the first partition.

[0012] Preferably, an air intake pipe is provided on one side of each adjustment assembly, and each air intake pipe passes through the outer tube and the inner tube in sequence, a one-way valve is provided on one end of the air intake pipe close to the inner tube, and a pressure valve is provided on the side of the air intake pipe away from the inner tube.

[0013] Preferably, a first groove is provided on the bottom surface of the extrusion plate, and the first groove is in an arc shape. A pressure relief groove is provided on the left side surface of the extrusion plate, and the cross section of the pressure relief groove is in a U-shape.

[0014] Preferably, a rubber sleeve is sleeved on the outer surface of the inner tube, and the rubber sleeve is in contact with four extrusion plates. A group of first mounting plates arranged in a circumference are fixedly connected to the middle of the outer surface of the inner tube, and each of the first mounting plates is fixedly connected to the inner wall of the outer tube on one side away from the inner tube.

[0015] Preferably, the outer surface of the rubber sleeve is sleeved with two symmetrical first rubber rings, and the outer surface of each first rubber ring is in close contact with the inner wall of the outer tube, the inner wall of the inner tube is provided with two groups of symmetrical second grooves, and an intake ring is slidably connected between the insides of each group of the second grooves, and the side surfaces of the two intake rings that are close to each other are both inclined, and a spring is provided between each second groove and the intake ring.

[0016] Technical effects of the present invention: 1. The present invention can increase the air pressure in the gap between the inner tube and the outer tube through the cooperation of the fan and the extrusion plate, so that the air pressure outside the inner tube is greater than the air pressure inside the inner tube. If the inner tube is damaged, under the action of the air pressure, it can also effectively prevent gas leakage. With the cooperation of the first rubber ring and the rubber sleeve, the air tightness can be further improved.

[0017] 2. The present invention can open the air inlet pipe by adjusting the position of the extrusion plate, and can reintroduce the collected gas into the inner tube through the air inlet pipe to reduce waste. At the same time, the gas is diverted to reduce the air pressure caused by it, avoiding the damaged part of the inner tube being further damaged by the air pressure. Under the action of the fan, it can play a role of drainage, making the gas transmission faster.

[0018] 3. The present invention can open the gas relief groove again by adjusting the position of the extrusion plate to discharge the excess gas, so that the amount of leaked gas is always consistent with the amount of diversion, avoiding the gas pressure to increase again and causing the outer tube to be damaged. The exhaust gas can be mixed with the inert gas through the fan to reduce its concentration and avoid dangerous situations during subsequent discharge.

[0019] 4. The present invention detects the air pressure in real time through an air pressure sensor and adjusts the position of the fan according to different pressure conditions, so that it can handle different pressure conditions accordingly and avoid the outer tube from being cracked due to the gradual increase in air pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall front cross-sectional structure of the present invention; Figure 3 It is a schematic diagram of the cross-sectional structure of the wiring head of the present invention; Figure 4 This is a schematic diagram of the structure of the adjustment box of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the adjustment box of the present invention; Figure 6 It is a schematic diagram of the overall right side cross-sectional structure of the present invention; Figure 7 This is a schematic diagram of the cross-sectional structure of the outer tube of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the inner tube of the present invention.

[0021] In the figure: 1. outer tube; 2. inner tube; 3. adjustment assembly; 301. adjustment box; 302. second slide groove; 303. second partition; 304. third slide groove; 305. moving plate; 306. through groove; 307. extrusion plate; 308. air inlet; 309. first slide groove; 310. first partition; 311. through hole; 312. air intake scoop; 313. restraint plate; 314. first groove; 315. pressure relief groove; 4. air intake pipe; 5. rubber sleeve; 6. first mounting plate; 7. first rubber ring; 8. second groove; 9. air intake ring; 10. protective shell; 11. second mounting plate; 12. exhaust pipe; 13. terminal head; 14. pipeline; 15. bellows; 16. positioning ring; 17. second rubber ring. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] First embodiment like Figures 1 to 8 As shown, this embodiment discloses a leak-proof component, which is used in a double-leak-proof gas electric melting pipe fitting, including an outer tube 1 and an inner tube 2. By adopting double-layer protection of the outer tube 1 and the inner tube 2, damage of the single-layer protection is avoided to cause gas leakage, and a gap is formed between the outer tube 1 and the inner tube 2, and the air pressure inside the gap can be adjusted to prevent the inner tube 2 from being damaged and overflowing. The inner tube 2 is arranged inside the outer tube 1, and the outer surface of the outer tube 1 is provided with four adjustment components 3 arranged in a circle, and the outer surface of the inner tube 2 is provided with an air pressure sensor. The adjustment component 3 can be adjusted accordingly according to the leakage of the inner tube 2. In normal use, a method of punching the gap between the outer tube 1 and the inner tube 2 is adopted to avoid leakage. When the leakage reaches a first threshold value, the gas is diverted by dredging to reduce the loss of air pressure to the inner tube 2 and the outer tube 1. When the leakage reaches a second threshold value, a pressure relief method is adopted to guide part of the gas out; The adjustment component 3 includes an adjustment box 301, and the front and rear walls of the adjustment box 301 are both provided with second slide grooves 302. The second slide grooves 302 can constrain the movement trajectory of the second partition plate 303 so that it can move smoothly to avoid rollover and deflation. The second partition plate 303 is slidably connected between the two second slide grooves 302. The second partition plate 303 can effectively divide the space into two parts to avoid the mixing of air and gas during the transportation process, so that the gas concentration is reduced and the subsequent use is affected. The bottom surface of the second partition plate 303 is provided with a third slide groove 304, and the third slide groove 304 is slidably connected with a moving plate 305. A spring is provided between the moving plate 305 and the third slide groove 304. Under the elastic force of the spring, the moving plate 305 continues to drop and is always in contact with the upper surface of the extrusion plate 307, so that a gap between the second partition plate 303 and the extrusion plate 307 is avoided during the adjustment process, so that the outside air is mixed with the internal gas, so that the gas concentration is reduced and the subsequent use is affected. A first slide groove 309 is provided on the upper surface of the adjustment box 301, and a first baffle 310 is slidably connected inside the first slide groove 309, so that the first baffle 310 can move along the trajectory of the first slide groove 309. When the position of the first baffle 310 is adjusted, the fan can be effectively driven to move, and under the action of the second slide groove 302, the upper fan can be moved to the outside of the adjustment box 301, and the fan can effectively drive the air to circulate, so that it mixes with the overflowed gas, reduces the concentration of the overflowed gas, and avoids dangerous situations during subsequent discharge. A group of through holes 311 distributed in a rectangular shape are provided in the middle of the first baffle 310, and a fan is respectively arranged inside each through hole 311. The position of the fan can change with the first baffle 310. When in the first position, the fan is located inside the adjustment box 301. When started, the gas on the right side of the second baffle 303 can be sucked away, and the second baffle 303 is gradually moved under the action of air pressure. The gradual movement to the right increases the gas on the left side of the second partition 303, so that the extrusion plate 307 moves downward, and the air pressure between the inner tube 2 and the outer tube 1 increases. By increasing the air pressure, gas leakage in the inner tube 2 is prevented. In the second position, the fan is still located inside the adjustment box 301, but the air inlet 308 is open. Under the action of the fan, it can play a certain drainage role, making the gas transmission faster. In the third position, the fan moves to the outside of the adjustment box 301. The fan can effectively drive the air to circulate and mix it with the overflowed gas, reduce the concentration of the overflowed gas, and avoid dangerous situations during subsequent discharge. An air inlet hopper 312 is provided on the left side of the adjustment box 301, and a constraint plate 313 is provided on the left side of the first partition 310. When the extrusion plate 307 is gradually increased by the gas pressure and contacts the constraint plate 313, it can drive the second partition 303 to rise, thereby achieving the purpose of adjusting the position of the first partition 310.

[0024] The bottom surface of the adjustment box 301 is provided with a through groove 306, which penetrates the adjustment box 301 and the outer tube 1, so that the adjustment box 301 and the outer tube 1 are connected, so that the gas can be transmitted freely. The inside of the through groove 306 is slidably connected with an extrusion plate 307, and the cross section of the extrusion plate 307 is in the shape of an inverted convex character. The special shape of the extrusion plate 307 makes it more adaptable. The position of the extrusion plate 307 can be freely adjusted, so that the four extrusion plates 307 are in close contact with the rubber sleeve 5, and the rubber sleeve 5 is more tightly pressed by pressure. The inner tube 2 is fitted more closely to make it more airtight, an air inlet 308 is provided on the right side wall of the through groove 306, and the other end of the air inlet 308 is connected to the adjustment box 301. When the extrusion plate 307 is subjected to the rising gas pressure, the extrusion plate 307 passes over the air inlet 308, thereby opening the air inlet 308, allowing the gas to enter the right side of the adjustment box 301 through the air inlet 308, and enter the inner tube 2 again through the air intake pipe 4, so that the leaked gas can be effectively collected and recycled to reduce waste.

[0025] A first groove 314 is provided on the bottom surface of the extrusion plate 307. The first groove 314 is in an arc shape. The first groove 314 can fit the rubber sleeve 5 more closely, further improving the air tightness. A pressure relief groove 315 is provided on the left side of the extrusion plate 307. When the gas between the inner tube 2 and the outer tube 1 reaches the second threshold, in order to prevent the outer tube 1 from being damaged again, the excess gas can be discharged through the pressure relief groove 315 to avoid damage to the outer tube 1 caused by excessive gas. The cross-section of the pressure relief groove 315 is in a 7-shape. When the extrusion plate 307 gradually rises, the upper end of the pressure relief groove 315 can be connected to the air inlet scoop 312, so that the excess gas can be effectively discharged to avoid load conditions.

[0026] The outer surface of the inner tube 2 is sleeved with a rubber sleeve 5, and the rubber sleeve 5 is in contact with the four extrusion plates 307. The rubber sleeve 5 can wrap the inner tube 2, so as to effectively enhance the air tightness of the inner tube 2. A group of first mounting plates 6 arranged in a circumference are fixedly connected to the middle of the outer surface of the inner tube 2. The side of each first mounting plate 6 away from the inner tube 2 is fixedly connected to the inner wall of the outer tube 1. The outer surface of the rubber sleeve 5 is sleeved with two symmetrical first rubber rings 7, and the outer surface of each first rubber ring 7 is in close contact with the inner wall of the outer tube 1. When the air pressure between the two first rubber rings 7 increases, The inner wall of the inner tube 2 is provided with two groups of symmetrical second grooves 8, and each group of second grooves 8 is slidably connected with an intake ring 9. The intake ring 9 is elastically spring-loaded to make it fit more closely to prevent gas from overflowing from the gap. The side surfaces of the two intake rings 9 that are close to each other are both inclined. The intake ring 9 on the right side is prevented from accumulating at the corners during gas transmission under the action of the inclined surface. A spring is provided between each second groove 8 and the intake ring 9.

[0027] An air intake pipe 4 is provided on one side of each adjustment component 3, and each air intake pipe 4 passes through the outer tube 1 and the inner tube 2 in sequence. The air intake pipe 4 can reintroduce the collected gas into the inner tube 2 to reduce waste, and at the same time divert the gas to reduce the air pressure caused by it, so as to prevent the damaged part of the inner tube 2 from being damaged again due to the air pressure, thereby increasing the gas leakage again. A one-way valve is provided on the end of the air intake pipe 4 close to the inner tube 2. Under the action of the one-way valve, the gas can be effectively prevented from re-entering the adjustment box 301 through the air intake pipe 4 to avoid backflow. A pressure valve is provided on the side of the air intake pipe 4 away from the inner tube 2, which can allow the gas to pass through when the pressure reaches a certain value.

[0028] Second embodiment The present embodiment discloses a double-leak-proof electric fusion pipe fitting for gas, comprising a leak-proof component and a protective shell 10. The protective shell 10 is arranged on the outside of the leak-proof component. The interior of the protective shell 10 is filled with an inert gas. The inert gas can be mixed with the gas to reduce the concentration of the gas to avoid ignition when encountering an open flame during discharge. A group of second mounting plates 11 arranged in a circumference are provided in the middle of the inner wall of the protective shell 10, and the other side of each second mounting plate 11 is fixedly connected to the leak-proof component. The middle of the upper surface of the protective shell 10 is connected to an exhaust pipe 12. A pressure valve is provided inside the exhaust pipe 12. The pressure valve here is connected to an external computer. When the pressure valve here is opened, the signal will be directly transmitted to the computer, and then the signal will be transmitted to the stop valve at the front end of the gas through the computer to close the stop valve to avoid further increase in waste caused by continued transmission of the gas.

[0029] Both ends of the protective shell 10 are threadedly connected with terminal heads 13, which are assembled in a splicing manner to make it more convenient to replace or repair. A pipe 14 is inserted into the interior of each terminal head 13, and a bellows 15 is provided inside each pipe 14. The ends of the two bellows 15 close to each other are provided with positioning rings 16, and a second rubber ring 17 is provided between the positioning ring 16 and the terminal head 13. The second rubber ring 17 can seal the connection between the pipe 14 and the terminal head 13 to avoid air leakage.

[0030] During assembly, first use wire strippers to open the pipe 14 to allow the internal bellows 15 to leak out, then manually pass the bellows 15 through the terminal head 13, hit the bellows 15 with a specific tool to form a positioning ring 16, so that the bellows 15 can be clamped inside the terminal head 13, manually add a second rubber ring 17 to the connection to improve its air tightness, and then splice the two terminal heads 13 at both ends of the protective shell 10 in turn through threads, and under the pressure of the two positioning rings 16, the two intake rings 9 are brought close to each other, and the spring is compressed to make the intake ring 9 and the positioning ring 16 contact more closely.

[0031] In actual use, the gas is transmitted from the left end to the right end. At this time, the fan is started. Under the action of the fan, suction can be generated. Under the action of the suction, the air on the right side of the second partition 303 can be introduced into the right side of the first partition 310. Under the action of air pressure, the second partition 303 gradually moves to the right, so that the space on the left side of the second partition 303 is increased. Under the action of negative pressure, part of the gas can be introduced into the left side of the second partition 303 through the air inlet hopper 312, so that the gas on the left side of the second partition 303 is increased, so that the extrusion plate 307 gradually moves downward along the trajectory of the through groove 306, so that the volume of the space between the inner tube 2 and the outer tube 1 is reduced, and the internal air pressure of this space is enhanced. First, the two first rubber rings 7 are pushed away from each other, so that the first rubber ring 7 is more closely attached to the connection, thereby improving the air tightness. At the same time, the extrusion plate 307 gradually descends and contacts the rubber sleeve 5. Under the dual action of extrusion and air pressure, the rubber sleeve 5 is more closely attached to the inner tube 2, further improving the air tightness of the inner tube 2 and avoiding air leakage.

[0032] When the pressure sensor value reaches the first threshold and continues to rise, it indicates that the inner tube 2 is damaged and the inner tube 2 continues to leak air, and the following adjustments are required: When the gas between the inner tube 2 and the outer tube 1 gradually increases, under the action of air pressure, the extrusion plate 307 can be pushed to increase its rising distance. Under the extrusion of the extrusion plate 307, the moving plate 305 can be gradually increased to increase its rising distance. The spring above the moving plate 305 is compressed, so that the moving plate 305 gradually enters the third slide groove 304. When the extrusion plate 307 continues to rise and crosses the air inlet 308, the air inlet 308 is opened, and the gas can enter the right side of the adjustment box 301 through the air inlet 308. At the same time, under the action of the fan, the gas in the first partition 310 can circulate, thereby generating a certain drainage effect, so that the leaked gas can be effectively collected and recycled to reduce waste. Since the gas in the space on the right side of the first partition 310 gradually increases, the pressure valve at the left end of the intake pipe 4 can be opened to allow the gas to circulate, and the gas is reintroduced into the inner tube 2 through the intake pipe 4.

[0033] When the pressure sensor detection value reaches the second threshold and continues to rise, it indicates that the amount of air leakage from the inner tube 2 can no longer be maintained through the intake pipe 4, and the following adjustments are required: At this time, under the action of air pressure, the extrusion plate 307 rises again and contacts the bottom surface of the constraint plate 313, so that the upper end of the pressure relief groove 315 on the left can be connected to the air inlet hopper 312, so that the excess gas can be effectively discharged to avoid the load situation. Under the action of extrusion, under the action of the extrusion plate 307, the first partition plate 310 can be driven to rise, so that the upper fan gradually passes through the first slide groove 309 through the adjustment box 301. Under the action of the upper fan, the inert gas is circulated, so that the exhausted gas can be quickly mixed with the inert gas, so that the concentration of the gas is reduced to avoid ignition due to open flames during discharge. When the exhausted gas gradually increases, the air pressure increases to open the pressure valve inside the exhaust pipe 12. The pressure valve here is connected to an external computer. When the pressure valve here is opened, the signal will be directly transmitted to the computer, and then the signal will be transmitted to the stop valve at the front end of the gas through the computer to close the stop valve to avoid further increase in waste caused by continued transmission of gas.

[0034] The main functions achieved by the present invention are: the air pressure between the inner tube 2 and the outer tube 1 can be increased by adjusting the component 3, and the gas leakage in the inner tube 2 can be prevented by increasing the air pressure. With the cooperation of the first rubber ring 7 and the rubber sleeve 5, the air tightness can be further improved. When the gas between the inner tube 2 and the outer tube 1 gradually increases, the collected gas can be reintroduced into the inner tube 2 through the intake pipe 4 to reduce waste. At the same time, the gas is diverted to reduce the air pressure caused by it, so as to avoid the damaged part of the inner tube 2 being damaged again due to the air pressure, so as to increase the gas leakage again. When the gas between the inner tube 2 and the outer tube 1 gradually increases again, the excess gas can be effectively discharged through the pressure relief groove 315, and the harm can be reduced by mixing with the inert gas.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A double leak-proof gas electric fusion pipe fitting, comprising a leak-proof component and a protective shell (10), characterized in that: The interior of the protective shell (10) is filled with an inert gas, a group of second mounting plates (11) arranged in a circumferential manner are provided in the middle of the inner wall of the protective shell (10), and the other side of each second mounting plate (11) is fixedly connected to the anti-leakage component, and the middle of the upper surface of the protective shell (10) is connected to an exhaust pipe (12), and a pressure valve is provided inside the exhaust pipe (12).

2. The double-leakage-proof gas electric fusion pipe fitting according to claim 1, characterized in that: Both ends of the protective shell (10) are threadedly connected to terminal heads (13), a pipe (14) is inserted into the interior of each terminal head (13), a bellows (15) is provided inside each pipe (14), and a positioning ring (16) is provided at one end of two bellows (15) close to each other, and a second rubber ring (17) is provided between the positioning ring (16) and the terminal head (13).

3. A leak-proof component, the leak-proof component is used for a double-leak-proof gas electric fusion pipe fitting, comprising an outer pipe (1) and an inner pipe (2), the inner pipe (2) being arranged inside the outer pipe (1), characterized in that: The outer surface of the outer tube (1) is provided with four adjustment components (3) arranged in a circumferential pattern, and the outer surface of the inner tube (2) is provided with an air pressure sensor; The adjustment assembly (3) comprises an adjustment box (301), the front and rear walls of the adjustment box (301) are both provided with second slide grooves (302), a second partition plate (303) is slidably connected between the two second slide grooves (302), a third slide groove (304) is provided on the bottom surface of the second partition plate (303), a moving plate (305) is slidably connected inside the third slide groove (304), and a spring is provided between the moving plate (305) and the third slide groove (304); The bottom surface of the adjustment box (301) is provided with a through slot (306), the interior of the through slot (306) is slidably connected with an extrusion plate (307), and the cross section of the extrusion plate (307) is in the shape of an inverted convex letter; the right side wall of the through slot (306) is provided with an air inlet (308), and the other end of the air inlet (308) is connected to the adjustment box (301).

4. The anti-leakage assembly according to claim 3, characterized in that: The upper surface of the adjustment box (301) is provided with a first slide groove (309), the interior of the first slide groove (309) is slidably connected to a first partition (310), a group of through holes (311) distributed in a rectangular shape are provided in the middle of the first partition (310), a fan is provided inside each of the through holes (311), an air intake scoop (312) is provided on the left side of the adjustment box (301), and a restraining plate (313) is provided on the left side of the first partition (310).

5. The anti-leakage assembly according to claim 3, characterized in that An air intake pipe (4) is provided on one side of each adjustment assembly (3), and each air intake pipe (4) sequentially passes through the outer tube (1) and the inner tube (2); a one-way valve is provided on one end of the air intake pipe (4) close to the inner tube (2), and a pressure valve is provided on one side of the air intake pipe (4) away from the inner tube (2).

6. The anti-leakage assembly according to claim 3, characterized in that: The bottom surface of the extrusion plate (307) is provided with a first groove (314), the first groove (314) is in an arc shape, and the left side surface of the extrusion plate (307) is provided with a pressure relief groove (315), the cross section of the pressure relief groove (315) is in a 7-shape.

7. The anti-leakage assembly according to claim 3, characterized in that: The outer surface of the inner tube (2) is sleeved with a rubber sleeve (5), and the rubber sleeve (5) is in contact with four extrusion plates (307). A group of first mounting plates (6) arranged in a circumference are fixedly connected to the middle of the outer surface of the inner tube (2), and a side of each first mounting plate (6) away from the inner tube is fixedly connected to the inner wall of the outer tube (1).

8. The anti-leakage assembly according to claim 7, characterized in that: The outer surface of the rubber sleeve (5) is sleeved with two symmetrical first rubber rings (7), and the outer surface of each first rubber ring (7) is in close contact with the inner wall of the outer tube (1). The inner wall of the inner tube (2) is provided with two groups of symmetrical second grooves (8), and an intake ring (9) is slidably connected between the insides of each group of the second grooves (8). The side surfaces of the two intake rings (9) that are close to each other are both inclined, and a spring is provided between each second groove (8) and the intake ring (9).

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