Electric power line close natural gas pipeline drainage grounding welding device and using method

Abstract

The invention belongs to the technical field of welding devices, and discloses an electric power line close natural gas pipeline drainage grounding welding device and a using method. The electric power line close natural gas pipeline drainage grounding welding device comprises a mold mechanism, a clamp mechanism and an ignition gun. The mold mechanism can form a welding space, and the grounding wire can be welded in the welding space in a closed mode. The clamp mechanism can enable the self-sealing piece to be located at the sealing position to seal the ignition through hole; and the ignition gun pushes the self-sealing piece to the ignition position from the sealing position, so that the ignition gun head extends into the ignition through hole to ignite the welding powder. According to the electric power line close natural gas pipeline drainage grounding welding device, a grounding wire is located in a closed welding space, flame escape is avoided, and potential safety hazards are reduced. According to the using method of the electric power line close natural gas pipeline drainage grounding welding device, it is guaranteed that a grounding wire is welded in a closed welding space, flame escape is avoided, potential safety hazards are reduced, and the safety of constructors is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of welding devices, and in particular to a drainage grounding welding device for a power line adjacent to a natural gas pipeline and a use method thereof. Background Art

[0002] In order to save arable land, my country's oil and gas pipelines and overhead power lines are often close to or cross each other. If oil and gas pipelines and AC power lines are close to each other, it will cause AC interference corrosion, damage the protection system, and pose a safety risk; if oil and gas pipelines and DC power lines are close to each other, it will bring safety risks such as burning equipment and electric shock to personnel.

[0003] At present, in the case of electromagnetic interference caused by proximity or crossover of oil and gas pipelines and overhead power lines, exothermic welding is often used to weld the drainage grounding wires of buried metal oil and gas pipelines. Although this method is fast to weld, simple to operate and use equipment, and corrosion-resistant, it poses great hidden dangers when welding drainage grounding wires adjacent to natural gas pipelines. If there are tiny leaks in the natural gas pipeline, flames will escape during exothermic welding, which can easily ignite natural gas, causing fires or even explosions. This not only threatens the safety of personnel and surrounding facilities, but also damages the energy transmission system and affects the stable supply of energy. Summary of the invention

[0004] The purpose of the present invention is to provide a drainage grounding welding device and a method for use of a power line near a natural gas pipeline, so as to avoid flame overflow during grounding wire welding, prevent ignition of natural gas, reduce construction risks, and ensure the safety of construction personnel.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A drainage grounding welding device for a power line adjacent to a natural gas pipeline, comprising: a mold mechanism, comprising a self-sealing part, a cover part and two movably connected molds, wherein the two molds are molded together to form a welding space, the welding space is used to hold welding powder and to position a grounding wire, the cover part is provided with an ignition through-hole, and when the cover part is covered on the top ends of the two molds after the molds are molded together, the ignition through-hole is connected to the welding space, the self-sealing part is movably connected to the cover part and is used to selectively close the ignition through-hole; a clamp mechanism, comprising a bracket and a reset component arranged on the bracket, the reset component is connected to the self-sealing part and can apply elastic force to the self-sealing part so that the self-sealing part is in a closed position to close the ignition through-hole; an ignition gun, comprising an ignition gun head, the ignition gun head is configured to push the self-sealing part to move from the closed position to the ignition position, so that the ignition gun head can extend into the ignition through-hole to ignite the welding powder.

[0007] The above-mentioned power line is adjacent to the natural gas pipeline drainage grounding welding device, wherein the self-sealing part includes two sealing plates, each of which is slidably connected to the cover part, the reset assembly can push the two sealing plates closer to each other to close the ignition through hole, and the ignition gun head can push the two sealing plates away from each other to extend into the ignition through hole.

[0008] The above-mentioned power line is adjacent to the natural gas pipeline drainage grounding welding device, wherein the ignition through hole is arranged at the top of the sealing cover, the bottom end of the sealing plate is provided with a slider, the sealing cover is provided with a slide groove, the slider is slidably connected to the slide groove, and along the direction in which the two sealing plates approach each other, the slide groove gradually tilts downward so that the sealing plate presses the sealing cover.

[0009] The above-mentioned power line is adjacent to the natural gas pipeline drainage grounding welding device, wherein the reset assembly includes a first elastic member and a push block, the first elastic member is arranged between the bracket and the push block, and the first elastic member can push the push block to abut against the sealing plate so that the sealing plate is located in the closed position.

[0010] The above-mentioned power line is adjacent to the natural gas pipeline drainage grounding welding device, wherein the self-sealing part is rotatably connected to the cover part, the self-sealing part is provided with an alignment hole, the reset assembly can apply elastic force to the self-sealing part so that the alignment hole and the ignition through hole are misaligned, and the ignition gun head can push the self-sealing part to rotate relative to the cover part so that the alignment hole and the ignition through hole are aligned.

[0011] The above-mentioned power line is adjacent to the natural gas pipeline drainage grounding welding device, wherein the reset assembly includes a support member and a second elastic member, the support member is located above the self-sealing member and is fixedly connected to the bracket, the two ends of the second elastic member are respectively fixedly connected to the support member and the self-sealing member, and the second elastic member can apply elastic force to the self-sealing member to cause the alignment hole and the ignition through hole to be misaligned.

[0012] The above-mentioned power line is close to the natural gas pipeline drainage grounding welding device, which also includes a third elastic member and a second guide rod. The second guide rod is sequentially inserted into the support member and the self-sealing member. The third elastic member is sleeved on the second guide. The third elastic member is located between the support member and the self-sealing member to push the self-sealing member to press down and seal the cover member.

[0013] The above-mentioned power line is close to the natural gas pipeline drainage grounding welding device, wherein the sealing cover includes two buckle covers, each of the molds is hinged with one buckle cover, and each buckle cover is provided with a groove on the side away from the mold. The buckle cover can cover the mold hinged thereto so that the two grooves are aligned to form the ignition through hole.

[0014] The above-mentioned power line is close to the natural gas pipeline drainage grounding welding device, wherein the clamping mechanism also includes a plurality of clamping members, the clamping members are connected to the bracket, and at least part of the clamping members can clamp the two molds after mold closing to fix the clamping mechanism and the molds.

[0015] The method for using the drainage grounding welding device for a power line near a natural gas pipeline adopts the drainage grounding welding device for a power line near a natural gas pipeline, which includes:

[0016] S1: Place two grounding wires to be welded inside one of the molds, and close the two molds so that the grounding wires are fixed in the welding space; put welding powder and ignition fuel into the welding space in sequence, close the cover, and preliminarily clamp the two molds;

[0017] S2: Connecting the clamp mechanism to the mold mechanism so that the reset assembly applies elastic force to the self-sealing member so that the self-sealing member is located in a closed position to close the ignition through hole;

[0018] S3: Use a handheld ignition gun to push the self-sealing part from the closed position to the ignition position, so that the ignition gun head extends into the ignition through hole to ignite the pilot fuel; the high temperature generated by the ignition of the pilot fuel melts the welding powder into a welding powder solution, and the welding powder solution wraps around the end of the grounding wire;

[0019] S4: After the solder powder solution is cooled, the fixture mechanism and the mold are separated, the cover is opened, the two molds are separated, and the ground wire after welding is taken out.

[0020] Beneficial effects of the present invention:

[0021] The present invention provides a grounding welding device for a power line adjacent to a natural gas pipeline, wherein two molds are movably connected, so that the grounding wire to be welded can be placed inside the mold, and the grounding wire can be welded after the molds are closed. After welding, the welded grounding wire can be taken out by simply separating the two molds, which is convenient to operate. The ignition gun can push the self-sealing part to move from the closed position to the ignition position, so that the ignition gun head extends into the ignition through-hole to ignite the welding powder. After the welding is completed and the ignition gun head is pulled out, the reset assembly can apply elastic force to the self-sealing part so that the self-sealing part is located in the closed position to close the ignition through-hole, so that the grounding wire is always in the closed welding space, so as to prevent the flame from escaping and will not ignite the natural gas leaked from the natural gas pipeline, thereby reducing safety hazards and ensuring the safety of construction personnel.

[0022] The method for using the grounding welding device for the power line adjacent to the natural gas pipeline provided by the present invention is as follows: the grounding wire is placed inside one of the molds, the mold is closed so that the grounding wire is fixed in the welding space; welding powder and ignition fuel are sequentially placed in the welding space, the cover is closed, and the two molds are initially clamped; the clamp mechanism is connected to the two molds, the reset assembly pushes the self-sealing part to move to the closed position, and the hand-held ignition gun pushes the self-sealing part from the closed position to the ignition position, so that the ignition gun head extends into the ignition through hole and ignites the ignition fuel; the high temperature generated after the ignition fuel is ignited melts the welding powder into a welding powder solution, and the welding powder solution is wrapped around the end of the grounding wire, and the welding powder solution can be fixed after cooling; the clamp mechanism and the mold are separated, the cover is opened, the two molds are separated, and the grounding wire after welding is taken out. It is ensured that the grounding wire is welded in a closed welding space to avoid flame escape and ignite the natural gas, thereby reducing safety hazards and ensuring the safety of construction personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of a drainage grounding welding device for a power line adjacent to a natural gas pipeline provided in the first embodiment of the present invention;

[0024] Figure 2 is a first structural schematic diagram of a mold mechanism provided in Embodiment 1 of the present invention;

[0025] Figure 3 is a second structural schematic diagram of the mold mechanism provided in the first embodiment of the present invention;

[0026] Figure 4 is a third structural schematic diagram of the mold mechanism provided in the first embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of a cover member and a self-sealing member provided in Embodiment 1 of the present invention;

[0028] Figure 6 It is a first cross-sectional view of a drainage grounding welding device for a power line adjacent to a natural gas pipeline provided in the first embodiment of the present invention;

[0029] Figure 7 is a first cross-sectional view of a cover member and a self-sealing member provided in Embodiment 1 of the present invention;

[0030] Figure 8 is an exploded schematic diagram of a cover member and a self-sealing member provided in Embodiment 1 of the present invention;

[0031] Fig. 9 is a second cross-sectional view of the cover member and the self-sealing member provided in the first embodiment of the present invention;

[0032] Fig.10 is a third cross-sectional view of the cover member and the self-sealing member provided in the first embodiment of the present invention;

[0033] Fig.11 yes Fig.10 The enlarged view of point A in the middle;

[0034] Fig.12 is a structural schematic diagram of a clamp mechanism provided in Embodiment 1 of the present invention;

[0035] Fig.13 is a cross-sectional view of a drainage grounding welding device for a power line adjacent to a natural gas pipeline provided in the first embodiment of the present invention when ignited;

[0036] Fig.14 is a cross-sectional view of the drainage grounding welding device for a power line adjacent to a natural gas pipeline provided in the first embodiment of the present invention after ignition;

[0037] Fig.15 is a second cross-sectional view of the drainage grounding welding device for a power line adjacent to a natural gas pipeline provided in the first embodiment of the present invention;

[0038] Fig.16 is a third cross-sectional view of the drainage grounding welding device for a power line adjacent to a natural gas pipeline provided in the first embodiment of the present invention;

[0039] Fig.17 It is a schematic diagram of the structure of a drainage grounding welding device for a power line adjacent to a natural gas pipeline provided in the second embodiment of the present invention;

[0040] Fig.18 This is an exploded view of a drainage grounding welding device for a power line adjacent to a natural gas pipeline provided in the second embodiment of the present invention;

[0041] Fig.19 is a structural schematic diagram of a mold mechanism provided in Embodiment 2 of the present invention;

[0042] Fig. 20 is a schematic diagram of the cooperation between the support member and the cover member provided in the second embodiment of the present invention;

[0043] Fig.21 is a first cross-sectional view of a mold mechanism and a support member provided in Embodiment 2 of the present invention;

[0044] Fig. 22 It is a second cross-sectional view of the mold mechanism and the support member provided in the second embodiment of the present invention.

[0045] In the figure:

[0046] 1. mold mechanism; 11. self-sealing member; 111. sealing plate; 1111. push portion; 112. alignment hole; 113. convex plate; 12. cover member; 121. ignition through hole; 122. slide groove; 1221. first slide groove; 1222. second slide groove; 1223. downwardly inclined portion; 1224. straight portion; 123. buckle cover; 1231. groove; 13. mold; 131. welding space; 1311. accommodating cavity; 1312. welding liquid channel; 1313. molding cavity; 1314. workpiece hole; 132. joint;

[0047] 2. Clamp mechanism; 21. Bracket; 211. Upper connecting plate; 212. Lower connecting plate; 213. Upper supporting plate; 214. Lower supporting plate; 215. Connecting arm; 22. Reset assembly; 221. First elastic member; 222. Push block; 223. First guide rod; 224. Limiting plate; 225. Support member; 226. Second elastic member; 227. Pin; 23. Clamping member; 231. Screw; 232. Threaded barrel; 233. Push plate; 234. Operating handle;

[0048] 3. Ignition gun; 31. Ignition gun head;

[0049] 4. Slider; 41. Connecting block; 42. Limiting block;

[0050] 5. A third elastic member; 6. A second guide rod;

[0051] 100, welding powder; 200, ignition block; 300, ignition powder; 400, air supply capsule; 500, air supply pipe; 600, air pump. DETAILED DESCRIPTION

[0052] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0053] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection, it can be a mechanical connection or an electrical connection, it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0055] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0056] The present invention provides a drainage grounding welding device for a power line adjacent to a natural gas pipeline and a use method thereof, which can avoid flame overflow during grounding wire welding, prevent natural gas from igniting, reduce construction risks, and ensure the safety of construction personnel.

[0057] Embodiment 1

[0058] like Figure 1-Figure 16 As shown, the present embodiment provides a drainage grounding welding device for a power line adjacent to a natural gas pipeline, comprising a mold mechanism 1, a clamp mechanism 2 and an ignition gun 3. The mold mechanism 1 comprises a self-sealing member 11, a cover member 12 and two movably connected molds 13. The two molds 13 are molded together to form a welding space 131. The welding space 131 is used to hold welding powder 100 and to position the grounding wire. The cover member 12 is provided with an ignition through hole 121. When the cover member 12 is covered on the top of the two molds 13 after the mold is closed, the ignition through hole 121 is connected to the welding space 131. The sealing member 11 is movably connected to the sealing cover member 12 and is used for selectively closing the ignition through hole 121; the clamp mechanism 2 includes a bracket 21 and a reset assembly 22 arranged on the bracket 21, the reset assembly 22 is connected to the self-sealing member 11 and can apply elastic force to the self-sealing member 11 so that the self-sealing member 11 is in a closed position to close the ignition through hole 121; the ignition gun 3 includes an ignition gun head 31, and the ignition gun head 31 is configured to push the self-sealing member 11 to move from the closed position to the ignition position, so that the ignition gun head 31 can extend into the ignition through hole 121 to ignite the welding powder 100.

[0059] The two molds 13 are movably connected, which is convenient for placing the grounding wire to be welded inside the mold 13. After the molds are closed, the grounding wire is welded. After the welding is completed, the welded grounding wire can be taken out by simply separating the two molds 13, which is easy to operate. The ignition gun 3 can push the self-sealing part 11 to move from the closed position to the ignition position, so that the ignition gun head 31 extends into the ignition through hole 121 to ignite the welding powder 100. After the welding is completed and the ignition gun head 31 is pulled out, the reset component 22 can apply elastic force to the self-sealing part 11 so that the self-sealing part 11 is located in the closed position to close the ignition through hole 121, so that the grounding wire is always in the closed welding space 131, preventing the flame from escaping and igniting the natural gas leaking from the natural gas pipeline, reducing safety hazards and ensuring the safety of construction personnel.

[0060] The mold mechanism 1 is used to form a closed welding space 131 for welding the ground wire. The two molds 13 can be connected by rotation or sliding. This embodiment does not specifically limit the shape of the mold 13. Figures 2 to 4 The shape of the mold 13 is a rectangular parallelepiped, and the two molds 13 are rotatably connected by existing hinges to ensure that the two molds 13 can rotate relative to each other, which is convenient for mold closing and mold separation.

[0061] In other embodiments, one of the two molds 13 is provided with a guide groove, and the other is provided with a guide column. When the molds are closed, the guide column slides along the guide groove so that the two molds 13 are pressed together to form a welding space 131. When the molds are separated, the guide column slides along the guide groove so that the two molds 13 are separated to remove the grounding wire after welding.

[0062] See also Figure 4 The welding space 131 includes a receiving chamber 1311, a soldering liquid channel 1312, a molding chamber 1313, and a workpiece hole 1314. The receiving chamber 1311 is located at the upper end of the mold 13, and contains an ignition block 200 and solder powder 100. The ignition block 200 is easily ignited and then melts the solder powder 100 into a solder powder solution. The soldering liquid channel 1312 is connected with the receiving chamber 1311 and the molding chamber 1313. The solder powder solution flows from the receiving chamber 1311 through the soldering liquid channel 1312 into the molding chamber 1313, wraps around the ground wire to be welded that enters the molding chamber 1313 from the workpiece hole 1314, and forms a welding head after cooling.

[0063] The cover 12 is used to cover the mold 13, reduce the ignition area, and improve safety. The cover 12 can be an integral structure or a split structure. When the cover 12 is an integral structure, it is directly covered on the top of the two molds 13 after the mold is closed. When the cover 12 is a split structure, it is respectively covered on the top of one mold 13. In this embodiment, see Figures 3 to 5The cover member 12 includes two buckle covers 123, each mold 13 is hinged with a buckle cover 123, and each buckle cover 123 has a groove 1231 on a side away from the mold 13. The buckle cover 123 can cover the mold 13 hinged thereto so that the two grooves 1231 are aligned to form an ignition through hole 121. The two molds 13 are aligned to form the ignition through hole 121, which can reduce the ignition area and press the two molds 13 tightly to improve the welding efficiency.

[0064] Optionally, the mold 13 and the cover member 12 are both made of high-purity graphite. High-purity graphite has good high temperature resistance and can withstand the high temperature after the ignition block 200 is ignited, thereby increasing the service life.

[0065] Specifically, the buckle cover 123 and the mold 13 are connected by an existing hinge, and the hinge is at least a two-stage hinge, which ensures that the lower end of the buckle cover 123 is lower than the upper end of the mold 13, and the edge of the buckle cover 123 can cover the mold 13 to improve stability. At the same time, the two-stage hinge facilitates the separation of the buckle cover 123 from the mold 13, avoiding interference between the mold 13 and the buckle cover 123 during mold separation.

[0066] The self-sealing member 11 is used to close the ignition through hole 121 . In the present embodiment, the self-sealing member 11 can slide relative to the cover member 12 , specifically between a closing position and an ignition position, so as to close or open the ignition through hole 121 .

[0067] See also Figure 1 , Figure 5 and Figure 6 The self-sealing member 11 includes two sealing plates 111, each of which is slidably connected to the cover member 12. The reset assembly 22 can push the two sealing plates 111 closer to each other to close the ignition through hole 121, and the ignition gun head 31 can push the two sealing plates 111 away from each other to extend into the ignition through hole 121. The reset assembly 22 pushes the two sealing plates 111 closer to each other to close the ignition through hole 121, which can improve the safety during welding. The ignition gun head 31 pushes the two sealing plates 111 away from each other to extend into the ignition through hole 121, which improves the convenience of ignition.

[0068] Alternatively, see Figure 6 and Figure 7A push portion 1111 is provided on one side of the sealing plate 111 close to the ignition through hole 121, so that the ignition gun head 31 can push the two sealing plates 111 away from each other to enter the ignition through hole 121. Specifically, the push portion 1111 is a slope, and the ignition gun head 31 has a conical surface. When the ignition gun head 31 pushes the two sealing plates 111, the conical surface of the ignition gun head 31 and the push portion 1111 contact each other. The ignition gun head 31 can apply pressure to the push portion 1111 along the normal direction of the contact line between the conical surface and the slope surface, and the pressure will generate a component force in the horizontal direction, pushing the two sealing plates 111 away from each other.

[0069] The sliding of the sealing plate 111 and the cover member 12 can be in the form of a slider 4 and a slide groove 122, or an existing slide rail. For example, the ignition through hole 121 is arranged at the top of the cover member 12, the bottom end of the sealing plate 111 is provided with a slider 4, the cover member 12 is provided with a slide groove 122, the slider 4 is slidably connected to the slide groove 122, and along the direction in which the two sealing plates 111 approach each other, the slide groove 122 gradually tilts downward so that the sealing plate 111 presses the cover member 12. The slider 4 and the slide groove 122 are easy to process and cooperate smoothly. The inclined setting of the slide groove 122 can pull the slider 4 to move downward so that the sealing plate 111 presses the cover member 12, improve the sealing effect, and improve safety.

[0070] Specifically, attend Figures 8 to 11 The slider 4 includes a connecting block 41 and a limiting block 42, the sliding groove 122 includes a first sliding groove 1221 and a second sliding groove 1222, the connecting block 41 is fixedly connected to the bottom side of the sealing plate 111, the limiting block 42 is fixedly connected to the bottom end of the connecting block 41, the first sliding groove 1221 is located above the second sliding groove 1222, the first sliding groove 1221 is used to accommodate the connecting block 41, the second sliding groove 1222 is used to accommodate the limiting block 42, the bottom of the first sliding groove 1221 is provided with a downwardly inclined portion 1223 and a straight portion 1224, the downwardly inclined portion 1223 gradually tilts downward along the direction in which the two sealing plates 111 approach each other, and is finally connected to the straight portion 1224, so that the slider 4 can move downward when sliding from the downwardly inclined portion 1223 to the position of the straight portion 1224, thereby driving the sealing plate 111 to move downward, which can not only close the ignition through hole 121, but also press the cover member 12 to improve the sealing effect.

[0071] In order to facilitate the installation of the slider 4 in the slide groove 122, one end of the slide groove 122 can penetrate to the end surface of the cover member 12. During installation, align the side of the slider 4 with the side of the slide groove 122, and then push the slider 4 into the slide groove 122.

[0072] The clamp mechanism 2 is used to clamp the two molds 13 after mold closing to improve the sealing of the mold 13. The bracket 21 is used to support the reset assembly 22. The bracket 21 can be an integral structure or a split structure. Exemplarily, the bracket 21 is an integral structure and is cast. The bracket 21 has a U-shaped accommodating space, and the mold mechanism 1 is placed in the accommodating space. The clamping member 23 connected to the bracket 21 is arranged on the side wall of the accommodating space and can clamp the mold mechanism 1 to fix the mold mechanism 1 and the clamp mechanism 2.

[0073] Exemplarily, the bracket 21 is a split structure, see Fig.12 The bracket 21 includes an upper connecting plate 211, a lower connecting plate 212, an upper supporting plate 213, a lower supporting plate 214 and a connecting arm 215. The upper connecting plate 211, the lower connecting plate 212, the upper supporting plate 213, the lower supporting plate 214 and the connecting arm 215 can be connected by bolts or fixed by plugging.

[0074] Optionally, the two upper support plates 213 are connected to the upper connecting plate 211 by existing bolts, and are distributed on both sides of the upper connecting plate 211, and are set at an angle with the upper connecting plate 211, specifically, the angle is 90 degrees. The two lower support plates 214 are connected to the lower connecting plate 212 by existing bolts, and are distributed on both sides of the lower connecting plate 212, and are set at an angle with the lower connecting plate 212, specifically, the angle is 90 degrees. A plurality of connecting arms 215 extend in the vertical direction, and the two ends of the connecting arms 215 are respectively fixedly connected to the upper connecting plate 211 and the lower connecting plate 212 to fix the upper support plate 213 and the lower support plate 214; the two ends of the connecting arms 215 are respectively fixedly connected to the upper support plate 213 and the lower support plate 214 to fix the upper support plate 213 and the lower support plate 214, so that the bracket 21 is more stable.

[0075] Optionally, reinforcing ribs may be provided between the upper connecting plate 211 and the lower connecting plate 212 and between the upper supporting plate 213 and the lower supporting plate 214 to further improve the stability of the bracket 21 .

[0076] In order to improve the sealing of the two molds 13 after mold closing, in this embodiment, the clamp mechanism 2 also includes a plurality of clamping members 23, the clamping members 23 are connected to the bracket 21, and at least some of the clamping members 23 can clamp the two molds 13 after mold closing to fix the clamp mechanism 2 and the molds 13, improve the sealing, and increase the safety. The material of the clamp mechanism 2 can be stainless steel or iron to improve the strength.

[0077] Given that the cover member 12 in this embodiment includes two snap covers 123, at least part of the clamping member 23 can clamp the cover member 12, so that the two snap covers 123 are close to each other and then clamp the upper ends of the two molds 13 after the mold is closed, thereby reducing the gap between the cover member 12 and the mold 13, improving the sealing, and preventing the flame from escaping from the gap between the cover member 12 and the mold 13.

[0078] The clamping member 23 may be an existing cylinder mechanism or a lead screw nut mechanism. Optionally, the clamping member 23 includes a screw 231, a threaded barrel 232, a push plate 233 and an operating handle 234. The threaded barrel 232 is fixedly connected to the upper support plate 213 and / or the lower support plate 214. The screw 231 is threadedly connected inside the threaded barrel 232. One end of the screw 231 passes through the bracket 21 and is fixedly connected to the operating handle 234, and the other end is fixedly connected to the push plate 233. When in use, the operating handle 234 is rotated in a first direction, and the screw 231 drives the push plate 233 to approach the mold 13, thereby clamping the mold 13 to improve the sealing performance; the operating handle 234 is rotated in a second direction, and the screw 231 drives the push plate 233 away from the mold 13, thereby loosening the mold 13 to facilitate mold separation. The first direction is opposite to the second direction.

[0079] It should be noted that see Fig.13 The bracket 21 can semi-enclose the two molds 13 after mold closing, and the lower support plate 214 is located on the outside of the mold 13, ensuring that the clamping parts 23 on the two lower support plates 214 can clamp the two molds 13 to improve the sealing performance. The upper support plate 213 is located on the outside of the cover part 12 and can clamp the cover part 12, so that the cover part 12 clamps the upper end of the mold 13, further improving the sealing performance and preventing the flame from escaping from the gap between the cover part 12 and the mold 13.

[0080] The reset assembly 22 can apply elastic force to the self-sealing member 11 so that the self-sealing member 11 is in a closed position to close the ignition through hole 121, thereby improving the sealing of the power line adjacent to the natural gas pipeline drainage grounding welding device and reducing safety hazards. Fig.12 and Fig.13 The reset assembly 22 includes a first elastic member 221 and a push block 222. The first elastic member 221 is arranged between the bracket 21 and the push block 222, and the first elastic member 221 can push the push block 222 to abut against the sealing plate 111 so that the sealing plate 111 is located in a closed position, thereby preventing the flame from escaping after the ignition block 200 is ignited, improving safety, and ensuring the safety of equipment and construction personnel.

[0081] See also Fig.12 , Fig.14 and Fig.15The first elastic member 221 can be an existing spring or an existing elastic sheet, as long as it can push the abutting block 222 to abut against the sealing plate 111 so that the sealing plate 111 is located in the closed position.

[0082] Exemplarily, the first elastic member 221 is a spring, and the reset assembly 22 further includes a first guide rod 223. The first elastic member 221 is sleeved on the first guide rod 223, and one end of the first guide rod 223 is connected to the push block 222, and the other end is connected to the bracket 21, and the two ends of the first elastic member 221 are respectively fixedly connected to the bracket 21 and the push block 222. The first guide rod 223 provides a limiting effect for the first elastic member 221, preventing the first elastic member 221 from deforming along its radial direction, ensuring that the first elastic member 221 deforms along the axial direction of the first guide rod 223 to push the push block 222 to contact the sealing plate 111 so that the sealing plate 111 is located in a closed position to close the ignition through hole 121.

[0083] The first guide rod 223 can be slidably connected to the bracket 21, or can be fixedly connected to the bracket 21. Optionally, the first guide rod 223 is slidably connected to the bracket 21, and a sliding through hole is provided on the bracket 21. The first guide rod 223 is inserted into the sliding through hole. Due to the clearance fit between the first guide rod 223 and the sliding through hole, the first guide rod 223 can slide along the inner wall of the sliding through hole. A limit plate 224 is provided at one end of the first guide rod 223 away from the push block 222 to prevent the first guide rod 223 from sliding off the bracket 21. When in use, the first elastic member 221 is placed in a compressed state by sliding the first guide rod 223, and the sealing plate 111 is slidably installed on the cover member 12. The first elastic member 221 squeezes the bracket 21 and the push block 222. Since the bracket 21 is fixed, the push block 222 and the first guide rod 223 are fixedly connected. Therefore, the first elastic member 221 will push the push block 222 to squeeze the sealing plate 111 so that the sealing plate 111 is in a closed position to close the ignition hole 121.

[0084] Optionally, the first guide rod 223 is fixedly connected to the bracket 21, and a sliding groove is provided on one side of the push block 222 close to the first elastic member 221 for accommodating the first guide rod 223. There is a gap between the first guide rod 223 and the groove wall of the sliding groove, so that the first guide rod 223 slides in the sliding groove. The first elastic member 221 can be fixed to the bracket 21 and the push block 222 by welding, which is simple to operate and has high connection strength. The first guide rod 223 is inserted through the upper support plate 213, and the parts on both sides of the upper support plate 213 that contact the first guide rod 223 can be welded and reinforced to ensure the stability of the first guide rod 223. When in use, by pushing the push block 222 to move along the first guide rod 223 close to the bracket 21, the first elastic member 221 is in a compressed state, and the sealing plate 111 is slidably installed on the cover member 12. Since the bracket 21 is fixed, the first elastic member 221 pushes the push block 222 to slide along the first guide rod 223 to approach the sealing plate 111, and then squeezes the sealing plate 111 so that the sealing plate 111 is located in a closed position to close the ignition through hole 121. It should be noted that the expansion and contraction amount of the first elastic member 221 is less than the length of the first guide rod 223. Since the first elastic member 221 is fixedly connected to the push block 222, the push block 222 will not slide away from the first guide rod 223.

[0085] Preferably, the length of the push block 222 is greater than 5 cm, which prolongs the distance between the first elastic member 221 and the mold 13, so that the first elastic member 221 is away from the heat source, reducing the impact of high temperature on the first elastic member 221 and improving its service life.

[0086] Exemplarily, the first elastic member 221 is a spring sheet, and both ends of the first elastic member 221 are fixedly connected to the bracket 21 and the push block 222. When in use, the first elastic member 221 is compressed by pushing the push block 222, so that the first elastic member 221 is in a compressed state, and the sealing plate 111 is slidably installed on the cover member 12. Since the bracket 21 is fixed, the first elastic member 221 squeezes the push block 222 so that the push block 222 abuts against the sealing plate 111, thereby making the sealing plate 111 in a closed position to close the ignition through hole 121.

[0087] There may be two reset assemblies 22 or three or more reset assemblies 22. Optionally, there may be two reset assemblies 22 distributed at 180° around the ignition hole 121. When in use, the first elastic members 221 of the two reset assemblies 22 push the push blocks 222 toward each other until they abut against the sealing plate 111, thereby pushing the two sealing plates 111 toward each other to close the ignition hole 121.

[0088] The ignition gun 3 is used to ignite the ignition block 200 in the welding space 131. The caliber of the ignition gun head 31 is smaller than the caliber of the ignition through hole 121, so that the ignition gun head 31 can be inserted into the ignition through hole 121. The shape of the ignition gun 3 is not specifically limited in this embodiment.

[0089] In order to solve the problem of insufficient combustion oxygen in the closed welding space 131, in this embodiment, see Fig.13 The air supply capsule 400 is placed in the accommodating cavity 1311, and contains combustible gas or fillable gas. When burning, the air supply capsule 400 is burned, and the combustible gas inside is released to ensure smooth welding of the grounding wire. Optionally, the material of the air supply capsule 400 is polyethylene, which is easy to obtain, and the combustible gas in the air supply capsule 400 can be oxygen, which has a good combustion-supporting type.

[0090] Alternatively, see Fig.16 A joint 132 is also provided on one side of the mold 13, on which an air supply pipe 500 is connected, and the other end of the air supply pipe 500 is connected to an air pump 600, which can deliver air into the welding space 131 to ensure the normal combustion of the ignition block 200. The length of the air supply pipe 500 is not less than 10 cm, and the air supply pipe 500 can be made of stainless steel to avoid being burned by flames and improve the service life.

[0091] See also Figure 4 , Fig.12 , Fig.13 and Fig.14 The present embodiment provides a grounding welding device for draining a power line near a natural gas pipeline. When in use, place the grounding wire to be welded in the workpiece hole 1314, close the two molds 13, and clamp the welded grounding wire in the molding cavity 1313. Add the welding powder 100 and the ignition block 200 into the accommodating cavity 1311 in sequence, close the cover member 12, install the clamp mechanism 2, and adjust the clamping member 23 so that the clamping member 23 on the lower support plate 214 clamps the mold 13 to improve its sealing performance. The clamping member 23 on the upper support plate 213 clamps the cover member 12, and the cover member 12 presses against the upper end of the mold 13 to prevent the flame from escaping from the gap between the mold 13 and the cover member 12. The push block 222 pushes the self-sealing member 11 to the closed position to close the ignition through hole 121. After the grounding wire is installed, the staff holds the ignition gun 3 and presses the contact gap of the two sealing plates 111 vertically downward. The conical surface of the ignition gun head 31 presses the push portion 1111, so that the two sealing plates 111 move away from each other. The ignition gun head 31 then extends into the ignition through hole 121, ignites the ignition block 200, and then withdraws. The sealing plates 111 approach each other to a closed position under the action of the reset assembly 22, and then close the ignition through hole 121, ensuring that the welding of the grounding wire is in a closed welding space 131, preventing the flame from escaping, and improving safety.

[0092] Embodiment 2

[0093] Figures 17 to 22 The second embodiment is shown, wherein the components identical or corresponding to the first embodiment are marked with the corresponding reference numerals of the first embodiment. For the sake of simplicity, only the differences between the second embodiment and the first embodiment are described. The difference is that the self-sealing member 11 is rotatably connected to the cover member 12, and the self-sealing member 11 can rotate relative to the cover member 12 between the closed position and the ignition position to close or open the ignition through hole 121.

[0094] The self-sealing member 11 is provided with an alignment hole 112, and the reset assembly 22 can apply elastic force to the self-sealing member 11 so that the alignment hole 112 is misaligned with the ignition through hole 121, and the ignition gun head 31 can push the self-sealing member 11 to rotate relative to the cover member 12 so that the alignment hole 112 is aligned with the ignition through hole 121. The misalignment of the alignment hole 112 and the ignition through hole 121 ensures the sealing of the drainage grounding welding device of the power line adjacent to the natural gas pipeline, and the alignment of the alignment hole 112 and the ignition through hole 121 facilitates the ignition gun head 31 to extend into the ignition through hole.

[0095] The cover member 12 can be a circular structure or two semicircular structures. Fig.18 The cover member 12 is a circular top cover, which is hinged to one of the molds 13 and can be connected with an existing hinge, which is easy to obtain. An ignition through hole 121 is provided on the cover member 12 away from the hinge.

[0096] The self-sealing member 11 can be covered on the cover member 12, or an annular groove and an annular protrusion can be provided to realize the rotation connection. Fig.18 and Fig.19 The self-sealing member 11 is covered on the cover member 12. Since there is a certain gap between the self-sealing member 11 and the cover member 12, the self-sealing member 11 can rotate relative to the cover member 12, and no additional structure is required, which is simple to process. The self-sealing member 11 can rotate relative to the cover member 12, which facilitates the alignment and misalignment of the alignment hole 112 and the ignition through hole 121, thereby improving the welding efficiency of the grounding wire.

[0097] In order to facilitate the ignition gun head 3 to push the self-sealing part 11 to rotate, in the present embodiment, the self-sealing part 11 also includes a convex plate 113, and the ignition gun head 31 pushes the convex plate 113 to make the self-sealing part 11 rotate relative to the cover part 12, thereby aligning the alignment hole 112 and the ignition through hole 121, so as to facilitate ignition; after the ignition gun 3 leaves the alignment hole 112, the reset assembly 22 applies force to the self-sealing part 11, so that the self-sealing part 11 rotates to the closed position, and the ignition through hole 121 and the alignment hole 112 are misaligned to close the welding space 131, so as to prevent the flame from escaping from the power line adjacent to the natural gas pipeline discharge grounding welding device during grounding wire welding, thereby preventing the natural gas leaking from the natural gas pipeline from igniting, thereby improving safety.

[0098] In this embodiment, participating Fig.18 and Fig. 20 The reset assembly 22 includes a support member 225 and a second elastic member 226. The support member 225 is located above the self-sealing member 11 and is fixedly connected to the bracket 21. The two ends of the second elastic member 226 are respectively fixedly connected to the support member 225 and the self-sealing member 11. The second elastic member 226 can apply elastic force to the self-sealing member 11 to misalign the alignment hole 112 and the ignition through hole 121, thereby closing the welding space 131 to prevent flame escape and improve safety.

[0099] Specifically, see Fig.17 and Fig. 20 , the support member 225 can be a cover plate, and the two ends of the support member 225 are respectively fixedly connected to the two upper support plates 213 of the support frame to ensure that the support member 225 is in a fixed position. The second elastic member 226 can select an existing torsion spring, and the two ends of the second elastic member 226 are respectively fixedly connected to the support member 225 and the self-sealing member 11. The connection between the second elastic member 226 and the support member 225 and the self-sealing member 11 can be welded or detachably connected. Exemplarily, the second elastic member 226 is detachably connected to the support member 225 and the self-sealing member 11, and the bottom surface of the support member 225 and the top surface of the self-sealing member 11 are respectively provided with a card slot. The two ends of the second elastic member 226 cooperate with the card slot, and the connection is convenient and firm, and can be disassembled. After the second elastic member 226 is damaged, the second elastic member 226, the support member 225 and the self-sealing member 11 can be disassembled, and a new second elastic member 226 can be replaced to reduce the maintenance cost.

[0100] In this embodiment. A pin shaft 227 is sleeved inside the second elastic member 226 to reduce the lateral displacement of the second elastic member 226 and increase its service life. When the second elastic member 226 is in a natural state, the alignment hole 112 on the self-sealing member 11 and the ignition through hole 121 on the cover member 12 are misaligned, and the ignition gun head 31 pushes the convex plate 113 on the self-sealing member 11 to rotate the self-sealing member 11 to a position where the alignment hole 112 is aligned with the ignition through hole 121, so that the ignition gun head 31 can ignite the welding powder 100 in the ignition through hole 121. At this time, the second elastic member 226 is in a deformed state. After the ignition gun head 31 leaves the ignition through hole 121, the second elastic member 226 is reset, driving the self-sealing member 11 to rotate to a closed position to close the ignition through hole 121.

[0101] In order to avoid the flame escaping due to the loose seal between the sealing member 12 and the mold 13, in the present embodiment, the power line adjacent to the natural gas pipeline drainage grounding welding device also includes a third elastic member 5 and a second guide rod 6, the second guide rod 6 is sequentially passed through the support member 225 and the self-sealing member 11, the third elastic member 5 is sleeved on the second guide rod 6, the third elastic member 5 is located between the support member 225 and the self-sealing member 11 to push the self-sealing member 11 to press down the sealing sealing member 12, so that the sealing member 12 presses down the mold 13, thereby reducing the gap between the sealing member 12 and the mold 13 and avoiding the flame escaping.

[0102] It should be noted that, since the support member 225 is fixedly connected to the bracket 21, and the bracket 21 is clamped to the mold 13 by the clamping member 23, the support member 225 is in a fixed position. Under the elastic force of the third elastic member 5, the third elastic member 5 exerts equal forces on the support member 225 and the self-sealing member 11, but since the support member 225 is fixed, the third elastic member 5 can push the self-sealing member 11 to press the cover member 12.

[0103] In this embodiment, see Fig.19 , two third elastic members 5 are provided, which are distributed at 180° around the axis of the pin 227, so that the self-sealing member 11 is evenly stressed and the stability is improved. In other embodiments, four or even more third elastic members 5 can be provided, which can be configured according to the actual situation and the use requirements.

[0104] The third elastic member 5 can be selected from existing springs, and the two ends of the third elastic member 5 can be welded to the support member 225 and the self-sealing member 11, which is easy to operate and firmly connected. The second guide rod 6 provides a guiding function for the third elastic member 5 to ensure that the third elastic member 5 is extended and retracted along the axial direction of the second guide rod 6. After the support member 225 and the self-sealing member 11 are installed, the third elastic member 5 is in a compressed state and will squeeze the support member 225 and the self-sealing member 11. Since the support member 225 and the bracket 21 are fixedly connected, the third elastic member 5 pushes the self-sealing member 11 to move downward, and then the self-sealing member 11 pushes the cover member 12 to move downward, reducing the gap between the cover member 12 and the mold 13, improving the sealing, preventing the flame from escaping, and increasing safety.

[0105] It should be noted that in this embodiment, the ignition hole 121 is arranged on the side of the cover 12, and the ignition gun head 31 is inconvenient to extend into the accommodating cavity 1311. Therefore, the ignition powder 300 and the welding powder 100 can be placed in the accommodating cavity 1311, and the ignition powder 300 can be placed at the ignition hole 121 at the same time to facilitate ignition.

[0106] The present embodiment provides a grounding welding device for draining and welding a power line near a natural gas pipeline, see Figure 4 , Fig.12 , Fig.21 and Fig. 22 When in use, place the grounding wire to be welded in the workpiece hole 1314, close the two molds 13, and clamp the welded grounding wire in the molding cavity 1313. Add welding powder 100 and ignition powder 300 into the accommodating cavity 1311 in sequence, close the cover 12, install the clamp mechanism 2, and adjust the clamp 23 so that the clamp 23 on the lower support plate 214 clamps the lower end of the mold 13 to improve its sealing. The third elastic member 5 is in a compressed state, and the third elastic member 5 applies equal force to the support member 225 and the self-sealing member 11. However, since the support member 225 is fixed, the third elastic member 5 can push the self-sealing member 11 to press the cover 12, and then the cover 12 presses the mold 13, reducing the gap between the cover 12 and the mold 13, improving the sealing, and preventing the flame from escaping from the gap between the mold 13 and the cover 12. When the second elastic member 226 is in the initial state, the alignment hole 112 and the ignition through hole 121 are misaligned, and the staff holds the ignition gun 3 and pushes the convex plate 113 along the radial direction of the self-sealing member 11, so that the alignment hole 112 is aligned with the ignition through hole 121, and the ignition powder 300 at the ignition through hole 121 is ignited and separated from the self-sealing member 11. Under the action of the reset assembly 22, the self-sealing member 11 rotates to the closed position to close the ignition through hole 121, ensuring that the welding of the grounding wire is in a closed welding space 131, preventing the flame from escaping, and improving safety.

[0107] Embodiment 3

[0108] The present embodiment provides a method for using a power line adjacent to a natural gas pipeline drainage grounding welding device, which uses any of the above-mentioned power line adjacent to a natural gas pipeline drainage grounding welding devices, including: S1: placing two grounding wires to be welded inside one of the molds 13, and clamping the two molds 13 so that the grounding wires are fixed in the welding space 131; sequentially placing welding powder 100 and primer into the welding space 131, closing the cover 12, and preliminarily clamping the two molds 13;

[0109] S2: Connect the clamp mechanism 2 to the mold mechanism 1 so that the reset assembly 22 applies elastic force to the self-sealing part 11 so that the self-sealing part 11 is located in the closed position to close the ignition through hole 121; S3: Use the handheld ignition gun 3 to push the self-sealing part 11 from the closed position to the ignition position, so that the ignition gun head 31 extends into the ignition through hole 121 to ignite the pilot fuel; the high temperature generated after the pilot fuel is ignited melts the welding powder 100 into a welding powder solution, and the welding powder solution wraps the end of the grounding wire; S4: After the welding powder solution cools down, separate the clamp mechanism 2 and the mold 13, open the cover part 12, separate the two molds 13, and take out the grounding wire after welding.

[0110] The method for using the drainage grounding welding device for a power line adjacent to a natural gas pipeline provided by the present invention comprises the following steps: placing a grounding wire inside one of the molds 13, and closing the mold 13 so that the grounding wire is fixed in a welding space 131; sequentially placing welding powder 100 and ignition fuel into the welding space 131, closing the cover member 12, and preliminarily clamping the two molds 13; connecting the clamp mechanism 2 to the two molds 13, and the reset component 22 pushes the self-sealing member 11 to move to a closed position, and the hand-held ignition gun 3 pushes the self-sealing member 11 to move from the closed position to the ignition position, so that the ignition gun head 31 extends into the ignition through hole 121 to ignite the ignition fuel; the high temperature generated after the ignition fuel is ignited melts the welding powder 100 into a welding powder solution, and the welding powder solution is wrapped around the end of the grounding wire, and the welding powder solution is shaped after cooling; separating the clamp mechanism 2 and the mold 13, opening the cover member 12, separating the two molds 13, and taking out the welded grounding wire. Ensure that the ground wire is welded in a closed welding space 131 to avoid flame escape and ignite natural gas, thereby reducing safety hazards and ensuring the safety of construction workers.

[0111] In S1, two grounding wires to be welded can be placed in the forming cavity 1313 through the workpiece hole 1314. The ignition fuel should be selected according to the actual situation. If the ignition gun head 31 can be inserted into the accommodating cavity 1311, the ignition fuel can be the ignition block 200. If the ignition gun head 31 cannot be inserted into the accommodating cavity 1311, the ignition fuel can be the ignition powder 300.

[0112] In S2 , the clamping mechanism 2 can be manually assisted to be suspended outside the mold 13 , and the clamping member 23 can be adjusted to clamp the two molds 13 , thereby fixing the clamping mechanism 2 to the mold 13 .

[0113] In S3 , it is necessary to detect whether the ignition gun 3 can be used normally and whether the reset assembly 22 can return the self-sealing member 11 to the closed position in time to close the ignition through hole 121 .

[0114] In S4, after taking out the welded grounding wire, the accommodating cavity 1311, the solder liquid channel 1312, the molding cavity 1313 and the workpiece hole 1314 are cleaned to ensure the welding quality of the grounding wire.

[0115] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A grounding welding device for draining power lines near natural gas pipelines, characterized in that: include: A mold mechanism (1) comprises a self-sealing member (11), a cover member (12) and two movably connected molds (13); the two molds (13) are molded together to form a welding space (131); the welding space (131) is used to contain welding powder (100) and to position a grounding wire; the cover member (12) is provided with an ignition through hole (121); when the cover member (12) is covered on the top of the two molds (13) after the molds are molded together, the ignition through hole (121) is connected to the welding space (131); the self-sealing member (11) is movably connected to the cover member (12) and is used to selectively close the ignition through hole (121); A clamp mechanism (2), comprising a bracket (21) and a reset component (22) arranged on the bracket (21), wherein the reset component (22) is connected to the self-sealing member (11) and is capable of applying elastic force to the self-sealing member (11) so that the self-sealing member (11) is located in a closed position to close the ignition through hole (121); An ignition gun (3) comprises an ignition gun head (31), wherein the ignition gun head (31) is configured to push the self-sealing member (11) to move from the closed position to the ignition position, so that the ignition gun head (31) can extend into the ignition through hole (121) to ignite the welding powder (100).

2. The drainage grounding welding device for a power line near a natural gas pipeline according to claim 1 is characterized in that: The self-sealing member (11) comprises two sealing plates (111), each of the sealing plates (111) being slidably connected to the cover member (12), the reset assembly (22) being capable of pushing the two sealing plates (111) closer together to close the ignition through hole (121), and the ignition gun head (31) being capable of pushing the two sealing plates (111) away from each other to extend into the ignition through hole (121).

3. The drainage grounding welding device for a power line near a natural gas pipeline according to claim 2 is characterized in that: The ignition through hole (121) is arranged at the top of the sealing member (12); a slider (4) is arranged at the bottom end of the sealing plate (111); a slide groove (122) is arranged on the sealing member (12); the slider (4) is slidably connected to the slide groove (122); along the direction in which the two sealing plates (111) approach each other, the slide groove (122) gradually tilts downward so that the sealing plate (111) presses the sealing member (12).

4. The drainage grounding welding device for a power line adjacent to a natural gas pipeline according to claim 2 is characterized in that: The reset assembly (22) comprises a first elastic member (221) and a push block (222); the first elastic member (221) is arranged between the bracket (21) and the push block (222); and the first elastic member (221) is capable of pushing the push block (222) to abut against the sealing plate (111) so that the sealing plate (111) is located in the closed position.

5. The drainage grounding welding device for a power line adjacent to a natural gas pipeline according to claim 1 is characterized in that: The self-sealing member (11) is rotatably connected to the cover member (12); the self-sealing member (11) is provided with an alignment hole (112); the reset assembly (22) can apply elastic force to the self-sealing member (11) so that the alignment hole (112) and the ignition through hole (121) are misaligned; and the ignition gun head (31) can push the self-sealing member (11) to rotate relative to the cover member (12) so that the alignment hole (112) and the ignition through hole (121) are aligned.

6. The drainage grounding welding device for a power line adjacent to a natural gas pipeline according to claim 5 is characterized in that: The reset assembly (22) comprises a support member (225) and a second elastic member (226); the support member (225) is located above the self-sealing member (11) and is fixedly connected to the bracket (21); two ends of the second elastic member (226) are respectively fixedly connected to the support member (225) and the self-sealing member (11); the second elastic member (226) can apply elastic force to the self-sealing member (11) so that the alignment hole (112) and the ignition through hole (121) are misaligned.

7. The drainage grounding welding device for a power line near a natural gas pipeline according to claim 6 is characterized in that: The invention also comprises a third elastic member (5) and a second guide rod (6), wherein the second guide rod (6) is sequentially passed through the support member (225) and the self-sealing member (11), the third elastic member (5) is sleeved on the second guide rod (6), and the third elastic member (5) is located between the support member (225) and the self-sealing member (11) to push the self-sealing member (11) downward to seal the cover member (12).

8. The drainage grounding welding device for a power line near a natural gas pipeline according to any one of claims 1 to 7, characterized in that: The cover member (12) comprises two buckle covers (123), each of the molds (13) being hingedly connected to one of the buckle covers (123), and each of the buckle covers (123) being provided with a groove (1231) on a side away from the mold (13), and the buckle cover (123) can cover the mold (13) hingedly connected thereto so that the two grooves (1231) are aligned to form the ignition through hole (121).

9. The drainage grounding welding device for a power line near a natural gas pipeline according to any one of claims 1 to 7, characterized in that: The clamping mechanism (2) further comprises a plurality of clamping members (23), wherein the clamping members (23) are connected to the bracket (21), and at least some of the clamping members (23) are capable of clamping the two molds (13) after mold closing to fix the clamping mechanism (2) and the molds (13).

10. A method for using a drainage grounding welding device for a power line near a natural gas pipeline, using the drainage grounding welding device for a power line near a natural gas pipeline as claimed in any one of claims 1 to 9, characterized in that: include: S1: placing two grounding wires to be welded inside one of the molds (13), and closing the two molds (13) so that the grounding wires are fixed in the welding space (131); placing welding powder (100) and ignition fuel into the welding space (131) in sequence, closing the cover (12), and preliminarily clamping the two molds (13); S2: connecting the clamp mechanism (2) to the mold mechanism (1) so that the reset assembly (22) applies elastic force to the self-sealing member (11) so that the self-sealing member (11) is located in a closed position to close the ignition through hole (121); S3: A handheld ignition gun (3) is used to push the self-sealing member (11) from the closed position to the ignition position, so that the ignition gun head (31) extends into the ignition through hole (121) to ignite the pilot fuel; the high temperature generated after the pilot fuel is ignited melts the welding powder (100) into a welding powder solution, and the welding powder solution is wrapped around the end of the grounding wire; S4: After the solder powder solution cools down, the clamping mechanism (2) and the mold (13) are separated, the cover member (12) is opened, the two molds (13) are separated, and the ground wire after welding is taken out.

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