Natural gas leakproof device

Abstract

The natural gas leakage prevention device comprises a leakage prevention shell, the leakage prevention shell is arranged on the outer side of a control valve in a sleeving mode and detachably connected with a pipeline, and a rotating shaft of the control valve penetrates through the leakage prevention shell; a glue barrel is arranged above the control valve and is fixedly connected with the anti-leakage shell; a rubber bowl sleeves the outer side of a rotating shaft of the control valve and is fixedly connected with the control valve; the glue barrel is fixedly connected with a cutting assembly which is fixedly connected with an air guide assembly, the air guide assembly is fixedly connected with an air bag, and the top end of the side wall of the air bag is fixedly connected with the inner wall of the anti-leakage shell and the side wall of the pipeline. An ignition assembly is detachably connected to the top face of the air bag and fixedly connected with the inner wall of the anti-leakage shell, and an ignition point of the ignition assembly is arranged below the air bag. The side face of the anti-leakage shell is provided with a plurality of exhaust holes, and the bottom face of the anti-leakage shell is fixedly connected and communicated with a plurality of one-way valves. The device can effectively seal leaked natural gas, give out an alarm in time, automatically seal a leakage point and safely process the leaked gas.

Description

Technical Field

[0001] This invention relates to the field of combustible gas explosion prevention technology, and in particular to a natural gas leak prevention device. Background Technology

[0002] Natural gas, as a clean and efficient energy source, is widely used in residential life and industrial production. However, due to its flammable and explosive properties, its safe use has always been a major concern. In natural gas transmission and usage systems, control valves are critical components used to regulate the flow and on / off of natural gas. Because the control valve shaft requires frequent rotation, the seal between the shaft and the valve body is prone to failure after prolonged use, leading to natural gas leaks. This is a common potential leak point in natural gas systems.

[0003] In existing technologies, leak prevention measures for natural gas control valves are relatively simple, typically using ordinary gaskets or sealing rings. With increased use, these seals wear and age, gradually reducing their sealing effectiveness and making long-term leak prevention difficult. Some leak prevention devices simply wrap the control valve, which can delay the spread of natural gas to some extent, but cannot effectively handle leaked natural gas.

[0004] When a natural gas leak occurs, the leaked gas accumulates in the surrounding environment. Due to the lack of effective monitoring and warning mechanisms, it often goes undetected in time. Once the natural gas concentration reaches the explosive limit, it will ignite upon contact with an open flame, causing serious casualties and property damage. Furthermore, existing devices are mostly leak alarms, which, while capable of warning of leaking natural gas, are ineffective in providing safety protection when no one is inside, and lack automatic sealing capabilities for leak points. After a leak occurs, the natural gas continues to leak, further expanding the danger zone. Therefore, there is an urgent need for a leak prevention device that can effectively seal leaking natural gas, issue timely warnings, automatically seal the leak point, and safely handle the leaking gas to solve the aforementioned problems in existing technologies. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention proposes a natural gas leak prevention device.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] A natural gas leak prevention device includes a natural gas control valve and a natural gas pipeline. Both ends of the control valve are fixedly connected to and communicate with the pipeline. The leak prevention device is sleeved outside the control valve and detachably connected to the pipeline. The device includes a leak-proof shell, which is sleeved outside the control valve and detachably connected to the pipeline. The control valve's rotating shaft passes through the leak-proof shell. A rubber drum is positioned above the control valve and is fixedly connected to the leak-proof shell. A rubber cup is sleeved outside the control valve's rotating shaft and is fixedly connected to the control valve. The barrel is fixedly connected to a cutting assembly, which is fixedly connected to a gas guiding assembly. The gas guiding assembly is fixedly connected to an airbag. The top of the side wall of the airbag is fixedly connected to the inner wall of the leak-proof shell and the side wall of the pipe, respectively, sealing the space between the airbag and the leak-proof shell. An ignition assembly is detachably connected to the top surface of the airbag. The ignition assembly is fixedly connected to the inner wall of the leak-proof shell, and the ignition point of the ignition assembly is located below the airbag. Several exhaust holes are opened on the side of the leak-proof shell, and the exhaust holes are detachably connected to the gas guiding assembly. Several one-way valves are fixedly connected to and connected to the bottom surface of the leak-proof shell.

[0008] Preferably, the anti-leakage shell includes a first shell and a second shell, the first shell and the second shell having completely identical structures; the top, side and bottom surfaces of the first shell are respectively provided with mounting grooves, and a sealing sleeve is snapped into the mounting groove, the sleeve being fitted onto the outside of the pipe, the first shell and the second shell being detachably and sealingly connected to the pipe and the shaft of the control valve respectively through the sleeve; the inner wall of the first shell and the inner wall of the second shell are respectively fixedly connected to the airbag.

[0009] Preferably, the cutting assembly includes a connecting cable, one end of which is fixedly connected to the side wall of the glue bucket, the connecting cable is wound around the outside of the glue bucket, and a cutting blade is fixedly connected to the side of the connecting cable that contacts the glue bucket, the cutting blade being used to cut the outer wall of the glue bucket; the other end of the connecting cable is fixedly connected to the air guiding assembly.

[0010] Preferably, two air guiding components are provided. Each air guiding component includes a sliding plate. The top end of the sliding plate is embedded and fixedly connected to the outside of the airbag. Both ends of the sliding plate are slidably connected to grooved plates. The grooved plates have a U-shaped structure. The two ends of the grooved plates are respectively fixedly connected to the inner wall of the first housing. The top end of the grooved plate is embedded in the outside of the airbag and is sealed and fixedly connected to the airbag. The outer side of the sliding plate is slidably connected to the inner wall of the first housing. The sliding plate is detachably connected to the exhaust port and fixedly connected to the other end of the connecting cable.

[0011] Preferably, the inner sidewall of the trough plate is provided with a longitudinal sliding groove, and an elastic rubber pad is fixedly connected in the longitudinal sliding groove. Several sliding balls are rotatably connected to the opposite side of the longitudinal sliding groove, and the sliding balls are respectively arranged to abut against the inner side of the slide plate and the rubber pad.

[0012] Preferably, there are two ignition components, each including a driver, and the two drivers are respectively fixedly connected to the top end of the inner cavity of the first housing and the top end of the inner cavity of the second housing; the driver is connected to an igniter, which passes through the airbag and is disposed in the space between the control valve and the anti-leakage shell.

[0013] Preferably, the glue bucket is filled with an adhesive that can cure upon contact with air; the volume of the adhesive in the glue bucket is greater than the volume of the glue bowl; the highest point of the volume in the glue bowl is higher than the top of the rotating shaft of the control valve; the glue bucket is made of resin, silicone, or rubber.

[0014] Preferably, the other end of the connecting cable is also fixedly connected to a delay component, which includes a guide block and several chain links. The guide block has a guide groove on its side and a guide hole on its bottom surface. The guide block is fixedly connected to the anti-leakage shell. The guide hole is in sliding contact with the chain link. Adjacent chain links are rotatably connected, and all chain links are combined to form a chain. The chain passes through the guide hole and is slidably connected to it. The chain link at the top of the chain is fixedly connected to a cable. One end of the cable passes around the top of the guide groove and is fixedly connected to a counterweight. The chain link at the bottom of the chain is fixedly connected to the other end of the connecting cable. The chain link is driven by a locking link, and the locking link is fixedly connected to the end face of the slide plate.

[0015] Preferably, the chain link includes a chain plate and a first locking tooth. One side of the chain plate is fixedly connected to the first locking tooth, and the side of the chain plate away from the first locking tooth is fixedly connected to the cutting blade. Adjacent chain plates are rotatably connected to each other. The locking link includes a second locking tooth. One end of the second locking tooth is hinged to the air guiding assembly. The other end of the second locking tooth is adapted to and engaged with the first locking tooth. An elastic rubber block is fixedly connected between the bottom surface of the other end of the second locking tooth and the air guiding assembly.

[0016] Preferably, the vent hole is plugged with a rubber stopper.

[0017] Compared with the prior art, the present invention has the following advantages and technical effects:

[0018] This invention, fitted onto a natural gas control valve, can contain leaking natural gas within a leak-proof housing. Simultaneously, the leaking gas causes the gasbag to deform, pushing the gas-guiding component upwards. This deformation activates an ignition component, which ignites the natural gas-air mixture below the gasbag, causing a mixed explosion. This explosion further deforms the gasbag and pushes the gas-guiding component upwards, opening the vent. The exploding gas is released through the vent, relieving pressure within the leak-proof housing. After pressure relief, the gasbag rebounds, pushing the gas-guiding component back to continue accumulating natural gas. The loud noise from the explosion serves as a warning. Simultaneously, the glue container can be cut by a cutting component during the upward movement of the gas-guiding component. The glue inside the container fills the glue cup, gradually sealing the leak point as the glue hardens, achieving complete closure of the control valve. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0020] Figure 1 This is a side view of the three-dimensional structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the main structure of the present invention with the anti-leakage shell removed;

[0022] Figure 3 A side-view three-dimensional structural diagram of the cutting assembly and the air guiding assembly;

[0023] Figure 4 This is a side view of the three-dimensional structure of the groove plate;

[0024] Figure 5 A side-view three-dimensional structural diagram of the cutting assembly, the air guiding assembly, and the delay assembly;

[0025] Figure 6 for Figure 5 Enlarged structural diagram at point A in the middle;

[0026] Figure 7 This is a side view of the three-dimensional structure of the guide slider;

[0027] Figure 8 This is a side view of the three-dimensional structure of the first shell.

[0028] The components are as follows: 1. Control valve; 2. Pipeline; 3. Glue bucket; 4. Glue cup; 5. Airbag; 6. Exhaust port; 7. Rubber plug; 8. First housing; 9. Second housing; 10. Rubber sleeve; 11. Mounting groove; 12. Connecting cable; 13. Cutting disc; 14. Slide plate; 15. Groove plate; 16. Longitudinal sliding groove; 17. Rubber pad; 18. Sliding ball; 19. Driver; 20. Igniter; 21. Guide block; 22. Guide groove; 23. Guide hole; 24. Cable; 25. Counterweight; 26. Chain plate; 27. First locking tooth; 28. Second locking tooth; 29. ​​Rubber block; 30. Check valve. Detailed Implementation

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] It should be noted that all components in the technical solution of this application require necessary additional facilities for water supply, oil supply, power supply, and gas supply for driving and / or control. Unless otherwise stated, they are assumed to be used and equipped with existing technology and no special explanation is required.

[0031] It should be noted that, in order to make the above-mentioned objectives, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] Depend on Figure 1-8 The diagram illustrates a natural gas leak prevention device, comprising a natural gas control valve 1 and a natural gas pipeline 2. Both ends of the control valve 1 are fixedly connected to and communicate with the pipeline 2. The leak prevention device is sleeved on the outside of the control valve 1 and detachably connected to the pipeline 2. The leak prevention device includes a leak-proof shell, which is sleeved on the outside of the control valve 1 and detachably connected to the pipeline 2. The rotating shaft of the control valve 1 passes through the leak-proof shell. A rubber bucket 3 is positioned above the control valve 1, and the rubber bucket 3 is fixedly connected to the inner wall of the first shell 8 or the second shell 9 of the leak-proof shell. A rubber cup 4 is sleeved on the outside of the rotating shaft of the control valve 1, and the rubber cup 4 is connected to the control valve 1... Valve 1 is fixedly connected; a cutting assembly is fixedly connected to the glue bucket 3, a gas guiding assembly is fixedly connected to the cutting assembly, and an airbag 5 is fixedly connected to the gas guiding assembly. The top of the side wall of the airbag 5 is fixedly connected to the inner wall of the anti-leakage shell and the side wall of the pipe 2, respectively, and the space between the top of the airbag 5 and the anti-leakage shell is sealed; an ignition assembly is detachably connected to the top surface of the airbag 5, and the ignition assembly is fixedly connected to the inner wall of the anti-leakage shell. The ignition point of the ignition assembly is set below the airbag 5; several exhaust holes 6 are opened on the side of the anti-leakage shell, and the exhaust holes 6 are detachably connected to the gas guiding assembly; several one-way valves 30 are fixedly connected to and connected to the bottom surface of the anti-leakage shell.

[0033] Furthermore, a rubber plug 7 is inserted into the vent 6. The rubber plug 7 can seal the leak-proof shell, preventing natural gas from leaking out and flowing into the outside of the device through the tiny sliding gap between the gas guide assembly and the leak-proof shell. It can also be ejected by an explosion without affecting the vent 6.

[0034] Furthermore, the leakage point of control valve 1 is usually located at the position where its shaft is constantly rotating, and the rotating handle of control valve 1 is located on the outside of the anti-leakage housing for easy daily use.

[0035] Furthermore, the airbag 5 is a rubber airbag, and the thickness of the top surface of the airbag 5 is half that of other parts. It can push and deform the top surface of the airbag 5 by pushing the bottom end of the airbag 5, thereby driving the ignition component.

[0036] The design is further optimized, with the leak-proof enclosure comprising a first housing 8 and a second housing 9, which are structurally identical. By enclosing the control valve 1 with these two housings, leaking natural gas can be sealed into a closed space, facilitating natural gas handling and providing initial leak prevention. The top, sides, and bottom of the first housing 8 are each provided with mounting grooves 11, into which a sealing sleeve 10 is fitted. The sleeve 10 is fitted onto the outside of the pipe 2. The first housing 8 and the second housing 9 are sealed to the pipe 2 and the control valve 1's shaft via the sleeve 10. The sleeve 10, fitted onto the outside of the pipe 2 or the control valve 1's shaft, provides auxiliary sealing with sealant. The sleeve 10 is a disposable rubber or silicone sleeve; if the first housing 8 and the second housing 9 are disassembled, the sleeve 10 needs to be cleaned and replaced. The first housing 8 and the second housing 9 are detachably connected to the pipe 2 and the control valve 1 respectively via rubber sleeves 10; the inner walls of the first housing 8 and the second housing 9 are fixedly connected to the airbag 5 respectively.

[0037] Furthermore, during the installation of the mating surfaces of the first housing 8 and the second housing 9, it is necessary to apply sealant or add a sealing gasket to enhance the overall sealing performance of the invention.

[0038] Furthermore, there are two airbags 5, which are fixedly connected to the inner walls of the first shell 8 and the second shell 9 respectively. The top ends of the two airbags 5 are sealed and fixedly connected, thus achieving the separation of the upper part of the airbags 5.

[0039] Furthermore, the outer sides of the first housing 8 and the second housing 9 are fixedly connected by several bolts and fixing feet. The fixing feet are fixedly connected to the first housing 8 and the second housing 9. This is existing technology and will not be described in detail here.

[0040] The solution is further optimized. The cutting component includes a connecting cable 12. One end of the connecting cable 12 is fixedly connected to the side wall of the glue bucket 3. The connecting cable 12 is wrapped around the outside of the glue bucket 3. A cutting blade 13 is fixedly connected to the side of the connecting cable 12 that contacts the glue bucket 3. The cutting blade 13 is used to cut the outer wall of the glue bucket 3. The other end of the connecting cable 12 is fixedly connected to the air guiding component.

[0041] Furthermore, by fixing the cutting blade 13 to the side of the connecting cable 12, the glue bucket 3 containing glue can be cut and broken during the process of the connecting cable 12 being driven upward by the air guide assembly. The glue flows into the glue bowl 4 below the glue bucket 3 until it covers the rotating shaft of the control valve 1. Through the curing of the glue, the leakage position of the control valve 1 is sealed.

[0042] Further optimization of the design involves two gas guiding components, each including a sliding plate 14. The top of the sliding plate 14 is embedded in and fixedly connected to the outside of the airbag 5. Both ends of the sliding plate 14 are slidably connected to grooved plates 15, which have a U-shaped structure. The two ends of the grooved plates 15 are fixedly connected to the inner wall of the first housing 8, and the top of the grooved plates 15 is embedded in and sealed to the outside of the airbag 5. The outer side of the sliding plate 14 is slidably connected to the inner wall of the first housing 8. The sliding plate 14 is detachably connected to the exhaust port 6, and the other end of the sliding plate 14 is fixedly connected to the connecting cable 12. The grooved plates 15 allow the sliding plate 14 to slide against the inner wall of the first housing 8, thus closing and opening the exhaust port 6. Furthermore, the two gas guiding components are respectively located within the inner walls of the first housing 8 and the second housing 9, and the exhaust ports 6 are respectively located on the outer sides of the first housing 8 and the second housing 9, both enabling the accumulation and release of natural gas. Under the pressure of the leaking natural gas, the airbag 5 will drive the slide plate 14 to rise continuously until the top surface of the airbag 5 contacts the control switch of the actuator 19. The igniter 20 will then ignite the natural gas mixer, causing the slide plate 14 to continue to rise and open the vent 6, thereby releasing the pressure inside the vent shell. The airbag 5 will rebound under the internal pressure, causing the slide plate 14 to return and close the vent 6 again. The leaking natural gas will continue to accumulate, and the pressure inside the vent shell will decrease after the pressure is released. Fresh air will enter the inner cavity of the vent shell through the one-way valve 30 at the bottom, facilitating the formation of the next explosion.

[0043] Furthermore, flame-retardant measures are applied to the surface of the airbag 5 material, which improves the safety of the present invention. This is existing technology and will not be described in detail here.

[0044] In a further optimized design, a longitudinal sliding groove 16 is formed on the inner side wall of the groove plate 15. An elastic rubber pad 17 is fixedly connected within the longitudinal sliding groove 16. Several sliding balls 18 are rotatably connected to the opposite side of the longitudinal sliding groove 16. The sliding balls 18 are respectively arranged to abut against the inner side of the slide plate 14 and the rubber pad 17. A rotating groove is formed on the opposite side of the longitudinal sliding groove 16, perpendicular to the longitudinal sliding groove 16, for the sliding balls 18 to rotate. This allows the sliding balls 18 to rotate within the longitudinal sliding groove 16 and also allows the sliding balls 18 to slide a certain distance under the action of abutting against the rubber pad 17. This is existing technology and will not be described in detail here, nor is it shown in the accompanying drawings.

[0045] Furthermore, the side of the rubber pad 17 that is in contact with the slider 18 is made of hard resin, and the other side is made of elastic silicone or rubber. The rubber pad 17 can abut against the slider 18, and the slider 18 can abut against the slide plate 14. This can further improve the tightness of the fit between the slide plate 14 and the first housing 8 and the second housing 9, and prevent them from shifting.

[0046] Further optimization of the design involves two ignition components, each comprising a driver 19, which is fixedly connected to the top of the inner cavity of the first housing 8 and the top of the inner cavity of the second housing 9, respectively. The driver 19 is connected to an igniter 20 via a power cord. The igniter 20 is positioned below the gasbag 5 and within the space between the control valve 1 and the anti-leakage shell. The ignition component is similar to a pulse igniter in a gas stove, consisting of two parts: the driver 19, which mainly includes a power supply (lithium battery or button battery), an oscillation circuit, a step-up transformer, and a control switch. By increasing the voltage of the power supply to a level sufficient to generate an electric arc discharge, the igniter 20 achieves the arc discharge, thus igniting the gas. This is existing technology and will not be elaborated further.

[0047] Furthermore, the igniter 20 can be suspended in the air or fixedly installed on the outside of the control valve 1 and the inner wall of the first housing 8 and the second housing 9 to facilitate the ignition of the gas.

[0048] The design is further optimized by filling the glue bucket 3 with an adhesive that cures upon contact with air. The adhesive capacity of the glue bucket 3 is greater than that of the glue bowl 4, and the highest point of the volume in the glue bowl 4 is higher than the top of the rotating shaft of the control valve 1, ensuring that the adhesive completely covers the rotating shaft of the control valve 1. The glue bucket 3 is made of resin, silicone, or rubber, making it easy to cut with the cutting disc 13.

[0049] In a further optimized design, a delay component is fixedly connected to the other end of the connecting cable 12. This delay component includes a guide slider 21 and several chain links. The guide slider 21 has a guide groove 22 on its side and a guide hole 23 on its bottom surface. The guide slider 21 is fixedly connected to the inner wall of the first housing 8 or the second housing 9 of the leak-proof shell. The guide hole 23 slides in contact with the chain links. Adjacent chain links are rotatably connected, and all chain links combine to form a chain. The chain passes through the guide hole 23 and slides with it. The guide slider 21 provides support and guidance for the entire chain, allowing the chain links to slide freely up and down. A cable 24 is fixedly connected to the chain link at the top of the chain. One end of the cable 24 passes over the top of the guide groove 22 and is fixedly connected to a counterweight 25. The chain link at the bottom of the chain is fixedly connected to the other end of the connecting cable 12. A locking link is connected to the chain link drive, and the locking link is fixedly connected to the end face of the slide plate 14.

[0050] Furthermore, the counterweight 25 can suspend the entire chain via the cable 24, preventing the chain from coming off the guide block 21 due to gravity.

[0051] The scheme is further optimized. The chain link includes a chain plate 26 and a first locking tooth 27. One side of the chain plate 26 is fixedly connected to the first locking tooth 27, and the side of the chain plate 26 away from the first locking tooth 27 is fixedly connected to the cutting plate 13. Adjacent chain plates 26 are rotatably connected to each other. The locking link includes a second locking tooth 28. One end of the second locking tooth 28 is hinged to the air guiding component. The other end of the second locking tooth 28 is adapted to and locked to the first locking tooth 27. The bottom surface of the other end of the second locking tooth 28 is fixedly connected to the air guiding component with an elastic rubber block 29.

[0052] The chain links are hinged together by chain plates 26, allowing the chain, consisting of several links, to wrap around the outside of the glue bucket 3. A cutting disc 13, fixedly mounted on the back of the chain plates 26, cuts the glue bucket 3. Simultaneously, a first locking tooth 27 fixedly connected to one side of the chain plates 26 can slide and engage with a second locking tooth 28. The second locking tooth 28 drives the entire chain upward, achieving the effect of tightening and cutting the outer wall of the glue bucket 3 with the cutting disc 13. The chain, suspended for a certain length, can be continuously tightened by the sliding plate 14, reducing the maintenance frequency of this invention. Furthermore, one of the two cutting components of this invention can be used.

[0053] The working process of this embodiment is as follows:

[0054] The leak-proof housing of this invention comprises a first housing 8 and a second housing 9 with identical structures. These two housings fit together to enclose the control valve 1. They are sealed to the pipeline 2 and the shaft of the control valve 1 via a rubber sleeve 10 within the mounting groove 11. The rubber sleeve 10 is fitted over the outside of the pipeline 2 or the shaft and sealed with sealant. Sealant is applied to the mating surfaces of the first housing 8 and the second housing 9, or a sealing gasket is added to enhance the seal, thereby confining leaked natural gas within a sealed space. The shaft of the control valve 1 passes through the leak-proof housing, and its rotating handle is located on the outside of the housing for easy operation. The shaft is a common leak point.

[0055] The glue container 3 is fixed inside the leak-proof housing and above the control valve 1. It is filled with air-curing glue. A cutting assembly is located on the outside of the glue container 3, connected to the gas guiding assembly, which in turn is fixedly connected to the airbag 5. The airbag 5 is made of rubber, with its top surface thickness being half that of other parts. Its top sidewalls are fixedly connected to the inner wall of the leak-proof housing and the side wall of the pipe 2, sealing the space between the airbag 5 and the leak-proof housing. An ignition point for the ignition assembly is located below the airbag 5. The ignition assembly's driver 19 is fixed to the top of the inner wall of the leak-proof housing (the top of the inner wall of the first housing 8 or the second housing 9), and is connected to the igniter 20 via a power cord. An exhaust port 6 is opened on the side of the leak-proof housing, plugged with a rubber stopper 7. The exhaust port 6 is detachably connected to the gas guiding assembly. Several one-way valves 30 are fixedly connected to the bottom surfaces of the first housing 8 and the second housing 9.

[0056] When natural gas leaks at the shaft of control valve 1, the leaking natural gas is trapped inside the vent housing. As the natural gas accumulates, the pressure inside the vent housing gradually increases, causing the gasbag 5 to deform. Because the top surface of the gasbag 5 is relatively thin, its bottom is pushed under pressure, and the top surface deforms, thereby driving the control switch of the ignition assembly. At the same time, the deformation of the gasbag 5 causes the slide plate 14 of the gas guiding assembly to move upward, and the gas guiding assembly drives the cutting assembly to operate.

[0057] If the cutting assembly consists of a connecting cable 12 and a cutting blade 13, the connecting cable 12 moves upward under the influence of the air guiding assembly, and the cutting blade 13 on its side cuts the outer wall of the glue bucket 3, causing the glue inside the glue bucket 3 to flow out.

[0058] When the cutting component is combined with the delay component, the air guide component drives the second tooth 28 of the locking link upwards. The second tooth 28 engages with the first tooth 27 on the chain, thereby driving the chain upwards. After several repetitions, the chain link pulls the connecting cable 12 to tighten the outer wall of the glue bucket 3. The cutting blade 13 on it cuts the glue bucket 3, and the cable 24 and counterweight 25 at the top of the chain ensure stable chain sliding. The guide slider 21 provides support and guidance for the chain, and the chain link slides through the guide hole 23. The glue capacity in the glue bucket 3 is greater than the capacity of the glue bowl 4. After the glue flows into the glue bowl 4, because the highest point of the glue bowl 4 is higher than the top of the control valve 1 shaft, it can completely cover the shaft, achieving initial sealing of the leakage point.

[0059] After being driven by the gasbag 5, the ignition assembly driver 19 increases the power supply voltage through the oscillation circuit and step-up transformer, causing the igniter 20 to generate an electric arc discharge, igniting the natural gas and air mixture below the gasbag 5. After the natural gas explodes, the resulting pressure further pushes the gasbag 5 to deform, causing the gas guiding assembly to continue to rise, ejecting the rubber plug 7 in the exhaust port 6, allowing the gas produced by the explosion to be discharged through the exhaust port 6, thus achieving pressure relief.

[0060] After depressurization, the pressure inside the vent housing decreases, causing the airbag 5 to rebound, resetting the air guiding assembly and closing the exhaust port 6. Simultaneously, the one-way valve 30 introduces fresh air, preparing for a potential next explosion. Meanwhile, the adhesive inside the glue cup 4 gradually solidifies upon contact with air, ultimately sealing the leak point at the control valve 1's shaft. Throughout the process, the loud noise generated by the explosion serves as a warning, alerting relevant personnel to take timely action.

[0061] During installation, the first housing 8 and the second housing 9 are sealed to the pipeline 2 and the control valve 1 shaft via a rubber sleeve 10. The rubber sleeve 10 is a disposable product and needs to be replaced after disassembly. Through the above implementation method, the device can effectively achieve the sealing, warning, handling, and plugging of natural gas leaks, greatly improving the safety of natural gas use.

[0062] The above are merely preferred embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A natural gas leak prevention device, comprising a natural gas control valve (1) and a natural gas pipeline (2), wherein both ends of the control valve (1) are fixedly connected to and communicate with the pipeline (2); the leak prevention device is sleeved on the outside of the control valve (1) and detachably connected to the pipeline (2), characterized in that: The leakage device includes a leak-proof shell, which is sleeved on the outside of the control valve (1) and detachably connected to the pipeline (2). The rotating shaft of the control valve (1) passes through the leak-proof shell. A glue bucket (3) is provided above the control valve (1), and the glue bucket (3) is fixedly connected to the leak-proof shell. A glue cup (4) is sleeved on the outside of the rotating shaft of the control valve (1), and the glue cup (4) is fixedly connected to the control valve (1). A cutting assembly is fixedly connected to the glue bucket (3), and a gas guiding assembly is fixedly connected to the cutting assembly. The gas guiding assembly is fixedly connected to... An airbag (5) is provided, the top of the side wall of the airbag (5) is fixedly connected to the inner wall of the anti-leak shell and the side wall of the pipe (2) respectively, and the space between the airbag (5) and the anti-leak shell is sealed; an ignition component is detachably connected to the top surface of the airbag (5), the ignition component is fixedly connected to the inner wall of the anti-leak shell, and the ignition point of the ignition component is set below the airbag (5); a plurality of exhaust holes (6) are provided on the side of the anti-leak shell, and the exhaust holes (6) are detachably connected to the gas guiding component; a plurality of one-way valves (30) are fixedly connected to and connected to the bottom surface of the anti-leak shell.

2. The natural gas leak prevention device according to claim 1, characterized in that: The anti-leakage shell includes a first shell (8) and a second shell (9). The first shell (8) and the second shell (9) have the same structure. The top, side and bottom surfaces of the first shell (8) are respectively provided with mounting grooves (11). A sealing sleeve (10) is snapped into the mounting groove (11). The sleeve (10) is sleeved on the outside of the pipe (2). The first shell (8) and the second shell (9) are detachably and sealed to the pipe (2) and the shaft of the control valve (1) respectively through the sleeve (10). The inner wall of the first shell (8) and the inner wall of the second shell (9) are respectively fixedly connected to the airbag (5).

3. The natural gas leak prevention device according to claim 2, characterized in that: The cutting assembly includes a connecting cable (12), one end of which is fixedly connected to the side wall of the glue bucket (3), the connecting cable (12) is wrapped around the outside of the glue bucket (3), and a cutting blade (13) is fixedly connected to the side of the connecting cable (12) that contacts the glue bucket (3), the cutting blade (13) being used to cut the outer wall of the glue bucket (3); the other end of the connecting cable (12) is fixedly connected to the air guiding assembly.

4. The natural gas leak prevention device according to claim 3, characterized in that: Two air guiding components are provided. The air guiding components include a slide plate (14). The top end of the slide plate (14) is embedded and fixedly connected to the outside of the airbag (5). The two ends of the slide plate (14) are slidably connected to a groove plate (15). The groove plate (15) has a U-shaped structure. The two ends of the groove plate (15) are fixedly connected to the inner wall of the first housing (8). The top end of the groove plate (15) is embedded in the outside of the airbag (5) and is sealed and fixedly connected to the airbag (5). The outer side of the slide plate (14) is slidably connected to the inner wall of the first housing (8). The slide plate (14) is detachably connected to the exhaust hole (6). The slide plate (14) is fixedly connected to the other end of the connecting cable (12).

5. The natural gas leak prevention device according to claim 4, characterized in that: The inner wall of the groove plate (15) is provided with a longitudinal sliding groove (16), and an elastic rubber pad (17) is fixedly connected in the longitudinal sliding groove (16). A number of sliding balls (18) are rotatably connected to the opposite side of the longitudinal sliding groove (16), and the sliding balls (18) are respectively in contact with the inner side of the slide plate (14) and the rubber pad (17).

6. The natural gas leak prevention device according to claim 2, characterized in that: Two ignition components are provided. Each ignition component includes a driver (19). The two drivers (19) are fixedly connected to the top end of the inner cavity of the first housing (8) and the top end of the inner cavity of the second housing (9), respectively. The driver (19) is connected to an igniter (20). The igniter (20) passes through the airbag (5) and is located in the space between the control valve (1) and the anti-leakage shell.

7. The natural gas leak prevention device according to claim 1, characterized in that: The glue bucket (3) is filled with glue that can cure upon contact with air; the glue capacity in the glue bucket (3) is greater than the capacity of the glue bowl (4); the highest point of the volume in the glue bowl (4) is higher than the top of the rotating shaft of the control valve (1); the glue bucket (3) is made of resin, silicone or rubber.

8. The natural gas leak prevention device according to claim 4, characterized in that: The other end of the connecting cable (12) is also fixedly connected to a delay component, which includes a guide block (21) and several chain links. The guide block (21) has a guide groove (22) on its side and a guide hole (23) on its bottom surface. The guide block (21) is fixedly connected to the anti-leakage shell. The guide hole (23) is in sliding contact with the chain links. Adjacent chain links are rotatably connected, and all chain links are combined to form a chain. The chain passes through the guide hole (23) and is slidably connected to it. The chain link at the top of the chain is fixedly connected to a cable (24). One end of the cable (24) passes around the top of the guide groove (22) and is fixedly connected to a counterweight (25). The chain link at the bottom of the chain is fixedly connected to the other end of the connecting cable (12). The chain link is driven by a locking link, and the locking link is fixedly connected to the end face of the slide plate (14).

9. The natural gas leak prevention device according to claim 8, characterized in that: The chain link includes a chain plate (26) and a first locking tooth (27). One side of the chain plate (26) is fixedly connected to the first locking tooth (27), and the side of the chain plate (26) away from the first locking tooth (27) is fixedly connected to the cutting blade (13). Adjacent chain plates (26) are rotatably connected to each other. The locking link includes a second locking tooth (28). One end of the second locking tooth (28) is hinged to the air guiding assembly. The other end of the second locking tooth (28) is adapted to and locked to the first locking tooth (27). An elastic rubber block (29) is fixedly connected between the bottom surface of the other end of the second locking tooth (28) and the air guiding assembly.

10. The natural gas leak prevention device according to claim 1, characterized in that: The vent hole (6) is blocked with a rubber plug (7).

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