A device for repairing a damaged point of a natural gas pipeline adjacent to a high-voltage direct-current grounding electrode

Abstract

The application discloses a kind of high-voltage direct-current ground pole adjacent natural gas pipeline break point repair device, belong to pipeline anticorrosion repair technical field, including workbench, the bottom of the workbench is uniformly fixedly connected with support leg, the top of the workbench one side is fixedly connected with fixed ring, the top of the workbench one side is provided with winding assembly, winding assembly is internally provided with winding assembly.The application, by setting winding assembly, sleeve is rotated by transmission gear driven outer gear ring, outer gear ring drives rotating ring to rotate, rotating ring is driven winding roller by connecting frame, and the axis of the pipeline to be repaired is rotated, so that the adhesive tape is wound on the outer surface of the pipeline to be repaired, and in the process, moving lead screw is driven by second lead screw seat to move the connecting ring and rotating ring at a constant speed, so that the adhesive tape can be uniformly wound on the pipeline for repair, so as to realize the automatic winding repair of the pipeline, improve the repair efficiency and repair effect.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of pipeline repair, and particularly relates to a natural gas pipeline breakage point repair device in the vicinity of a high-voltage direct-current grounding electrode. BACKGROUND

[0002] A high-voltage direct-current power transmission system uses stable direct current for transmission and has advantages of no inductive reactance, fast regulation speed, low line loss, low cost, large transmission capacity and suitability for long-distance transmission. Large-scale application of the high-voltage direct-current power transmission system inevitably causes intersection or close parallel with oil and gas pipelines. Based on the operating characteristics of the high-voltage direct-current power transmission, the grounding electrode of the high-voltage direct-current power transmission system will cause certain direct-current interference to the nearby metal structures, especially the oil and gas pipelines.

[0003] The high-voltage direct-current power transmission system and the oil and gas transmission pipeline form a shared corridor in multiple regions, so that the electromagnetic interference of the direct-current power transmission project on the nearby buried metal pipelines is increasingly prominent. In particular, when the single-pole grounding electrode is operated, a high-amplitude interference potential is generated on the pipeline, which may bring safety risks such as electric shock, equipment burnout, pipeline corrosion and hydrogen embrittlement to the pipeline, and then causes interference to the pipeline production and operation. For the buried oil and gas pipeline near the direct-current grounding electrode, regular excavation inspection and on-site corrosion repair are required, such as pipeline maintenance using pipeline surface coating materials such as anticorrosive paint and anticorrosive adhesive tape. The process is generally constructed by manual method, and problems such as uneven coating, many bubbles and low construction efficiency exist. Therefore, a new type of pipeline corrosion repair device with convenient construction and reliable coating is urgently needed in the oil and gas pipeline operation and maintenance engineering.

[0004] The invention patent of Chinese patent application number CN202210039965.6 discloses a pipeline repair winding device, relating to the technical field of oil transportation, which comprises a support frame, an axial power device, a circumferential power device and a spreading device arranged on the support frame; the spreading device is used to carry gauze for repairing the pipeline; the circumferential power device is used to drive the spreading device to move along the circumference of the repaired pipeline; and the axial power device is used to drive the spreading device to move along the axis of the repaired pipeline. The invention uses a mechanical device to realize mechanical winding of fiber gauze and reciprocating motion on a distance pipeline, thereby overcoming manual winding of gauze and reducing the labor intensity of operators. Thus, the pipeline can be quickly repaired to meet the uninterrupted requirements of oil field crude oil transportation. However, in the actual operation process, the winding effect between the adhesive tape and the pipeline may be loose, which will affect the repair effect of the pipeline breakage point. Therefore, a new type of natural gas pipeline breakage point repair device is urgently needed. SUMMARY

[0005] The purpose of this invention is to address the problem that the wrapping effect between the tape and the pipe may become loose, thus affecting the repair effect of the pipe damage point, and to propose a repair device for natural gas pipeline damage points near the high-voltage DC grounding electrode.

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

[0007] A device for repairing a damaged point of a natural gas pipeline near a high-voltage DC grounding electrode includes a workbench. Support legs are fixedly connected to all four sides of the bottom of the workbench. A fixing ring is fixedly connected to one side of the top of the workbench. A winding assembly is provided on one side of the top of the workbench. A winding assembly is provided inside the winding assembly. Side plates are fixedly connected to both ends of the top of the workbench. An electric push rod is fixedly connected to one side of one of the side plates. A limit guide assembly is fixedly connected to one end of the electric push rod and one side of the other side plate. A top plate is fixedly connected between the tops of the two side plates. A spraying assembly is provided at the bottom of the top plate.

[0008] The winding assembly includes a movable lead screw. A third slide groove is provided on the top of the worktable. The movable lead screw is rotatably connected to the third slide groove. A second lead screw seat is threadedly connected to the outer surface of the movable lead screw. The second lead screw seat is slidably connected to the third slide groove. A connecting ring is fixedly connected to the top of the second lead screw seat. A rotating ring is rotatably connected to one side of the connecting ring. A connecting piece is fixedly connected to the top of the connecting ring. A rotating rod is rotatably connected between the two side plates through a first rotating shaft. A sleeve is fitted on the outer surface of the rotating rod. The sleeve is rotatably connected to the connecting piece through a first bearing. The cross-sectional shape of the rotating rod and the inner wall of the sleeve is a regular hexagon.

[0009] As a further description of the above technical solution:

[0010] An external toothed ring is engaged with the outer surface of the rotating ring, and a transmission gear is meshed with the top of the external toothed ring. The transmission gear is engaged with the outer surface of the sleeve.

[0011] As a further description of the above technical solution:

[0012] One end of the rotating rod extends to one side of the side plate via the first rotating shaft and is fixedly connected to a driven wheel. A motor is fixedly installed on one side of the worktable via a mounting plate. One end of the motor output shaft extends into the third slide groove via the second rotating shaft and is fixedly connected to one end of the moving lead screw. A driving wheel is engaged on the outer surface of the second rotating shaft. A transmission belt drives the driving wheel and the driven wheel.

[0013] As a further description of the above technical solution:

[0014] The winding assembly includes two connecting frames, and a winding roller is rotatably connected between the two connecting frames via a third rotating shaft and a second bearing. Both sides of the winding roller are fitted with fitting wheels. A limiting plate is fixedly connected to the side of the fitting wheel away from the winding roller. A second telescopic rod is fixedly connected to the side of the limiting plate away from the fitting wheel. The end of the second telescopic rod away from the limiting plate is fixedly connected to the inner side of the rotating ring.

[0015] As a further description of the above technical solution:

[0016] A second spring is fitted on the outer surface of the second telescopic rod, and the two ends of the second spring are fixedly connected to one side of the limiting plate and the inner side of the rotating ring, respectively.

[0017] As a further description of the above technical solution:

[0018] The spraying assembly includes a storage box, the top of which is fixedly connected to the bottom of a top plate, a liquid pump fixedly connected to the bottom of the storage box, a telescopic hose fixedly connected to the bottom of the liquid pump, the end of the telescopic hose away from the liquid pump being fixedly connected to one side of a connecting ring, and a spray pipe fixedly connected to the inner side of the rotating ring.

[0019] As a further description of the above technical solution:

[0020] The connecting ring has a first annular cavity, the rotating ring has a second annular cavity, a connecting pipe is fixedly connected to one side of the connecting ring, the connecting ring and the rotating ring are rotatably connected, the connecting pipe has an annular cross-section, and the two ends of the connecting pipe are respectively connected to the first annular cavity and the second annular cavity, and the nozzle is connected to the second annular cavity.

[0021] As a further description of the above technical solution:

[0022] The limiting and guiding assembly includes a connecting platform. One side of the connecting platform is fixedly connected to one end of an electric push rod or one side plate. A cavity is formed inside the connecting platform. A sliding hole is formed on one side of the connecting platform and is connected to the cavity. A sliding column is slidably connected inside the sliding hole. A fitting rod is fixedly connected to the top of the sliding column. A pressing block is fixedly connected to the end of the sliding column away from the fitting rod. Pressing wheels are fitted to both sides of the pressing block. A connecting rod is fixedly connected to the end of the pressing wheel away from the pressing block. A fitting block is fixedly connected to the top of the connecting rod. Sliding grooves are formed on both sides of the top of the connecting platform and are connected to the cavity. The sliding column is slidably connected in the sliding groove. A slider is fixedly connected to both sides of the connecting rod. A second sliding groove is formed on both sides of the inner wall of the cavity, and the slider is slidably connected in the second sliding groove.

[0023] As a further description of the above technical solution:

[0024] A first telescopic rod is fixedly connected to one side of the bonding block. The end of the first telescopic rod away from the bonding block is fixedly connected to one side of the inner wall of the cavity. A first spring is sleeved on the outer surface of the first telescopic rod. The two ends of the first spring are fixedly connected to one side of the inner wall of the cavity and one side of the bonding block, respectively.

[0025] As a further description of the above technical solution:

[0026] Two connecting blocks are fixedly connected to the inner side of the fixed ring. A first sliding groove is provided on the top of the connecting blocks. Two adjusting screws are rotatably connected in the first sliding groove. The two adjusting screws are fixedly connected by a fourth rotating shaft. The two adjusting screws are symmetrically distributed along the center position of the fourth rotating shaft and the threads of the two adjusting screws are opposite. A first screw seat is threadedly connected to the outer surface of the adjusting screw. The first screw seat is slidably connected to the first sliding groove. A clamping plate is fixedly connected to the top of the first screw seat.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0028] 1. In this invention, by setting up a winding assembly, the motor drives the driven wheel to rotate via the driving wheel, the driven wheel drives the sleeve to rotate via the rotating rod, the sleeve drives the external gear ring to rotate via the transmission gear, the external gear ring drives the rotating ring to rotate, and the rotating ring drives the winding roller to rotate around the axis of the pipe to be repaired via the connecting frame, so that the tape is wound around the outer surface of the pipe to be repaired. In this process, the moving screw drives the connecting ring and the rotating ring to move at a uniform speed via the second screw seat, so that the tape can be wound and repaired on the pipe in all directions and evenly, thereby realizing automatic winding and repair of the pipe, improving repair efficiency and repair effect.

[0029] 2. In this invention, by setting up a spraying assembly, the adhesive in the storage box enters the first annular cavity through a liquid pump and a telescopic hose, and the adhesive enters the rotating ring through the connecting ring and is sprayed out through the spray nozzle. The adhesive is sprayed between the pipe to be repaired and the tape. The adhesive can improve the wrapping and adhesion effect of the tape on the pipe to be repaired, prevent the tape from loosening, and improve the repair effect on the repair point.

[0030] 3. In this invention, by setting a limiting guide component, the electric push rod drives the connecting platform to move and makes one side of the bonding rod fit against the pipe to be repaired. The pipe to be repaired drives the bonding rod to move, and the bonding rod drives the extrusion block to move through the sliding column. The extrusion block drives the connecting rod to move through the extrusion wheels on both sides. The connecting rod drives the bonding block to move and gradually fits against the inner wall of the pipe, thereby achieving limiting clamping of the pipe to be repaired, ensuring the stability of the pipe to be repaired, and thus ensuring the repair effect of the tape on the pipe to be repaired. Furthermore, by moving the two bonding blocks, the axial position of the pipe to be repaired is kept consistent with the axial center of the fixed ring, the connecting ring, and the rotating ring, avoiding deviation when the tape is wrapped. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural schematic diagram of a repair device for a natural gas pipeline rupture point near a high-voltage DC grounding electrode proposed in this invention;

[0032] Figure 2 This is a front view cross-sectional structural diagram of a repair device for a natural gas pipeline rupture point near a high-voltage DC grounding electrode proposed in this invention;

[0033] Figure 3 This invention proposes a repair device for natural gas pipeline damage points near high-voltage DC grounding electrodes. Figure 2 A magnified structural diagram of part A in the diagram;

[0034] Figure 4 This is a side view cross-sectional structural diagram of the winding assembly of a repair device for a natural gas pipeline rupture point near a high-voltage DC grounding electrode proposed in this invention.

[0035] Figure 5 This is a front view cross-sectional schematic diagram of the limiting guide component of a repair device for a natural gas pipeline rupture point near a high-voltage DC grounding electrode proposed in this invention.

[0036] Figure 6 This invention proposes a repair device for natural gas pipeline damage points near high-voltage DC grounding electrodes. Figure 5 A magnified structural diagram of part B in the diagram;

[0037] Figure 7 This is a front view cross-sectional view of the connecting block side of a repair device for a natural gas pipeline rupture point near a high-voltage DC grounding electrode proposed in this invention.

[0038] Legend:

[0039] 1. Workbench; 2. Electric push rod; 3. Side plate; 4. Top plate; 5. Limiting guide assembly; 501. Connecting platform; 502. Adhesive block; 503. Adhesive rod; 504. Sliding column; 505. Sliding groove; 506. Cavity; 507. Extrusion block; 508. First spring; 509. First telescopic rod; 510. Extrusion wheel; 511. Connecting rod; 512. Slider; 513. Second slide groove; 6. Winding assembly; 601. Driven wheel; 602. Transmission belt; 603. Drive wheel; 604. Motor; 605. Moving screw; 606. Second screw seat; 607. Third slide groove; 608. Rotating rod; 60 9. Connector; 610. Connecting ring; 611. Rotating ring; 612. External gear ring; 613. Sleeve; 614. Transmission gear; 7. Spraying assembly; 701. Storage box; 702. Spray nozzle; 703. Liquid pump; 704. Telescopic hose; 705. First annular cavity; 706. Connecting pipe; 707. Second annular cavity; 8. Winding assembly; 801. Second telescopic rod; 802. Second spring; 803. Limiting plate; 804. Adhesive wheel; 805. Connecting frame; 806. Winding roller; 9. Fixing ring; 10. Connecting block; 11. First slide groove; 12. First lead screw seat; 13. Adjusting lead screw; 14. Clamping plate. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please see Figure 1 - Figure 7 The present invention provides a technical solution:

[0042] A device for repairing a damaged point in a natural gas pipeline near a high-voltage DC grounding electrode includes a workbench 1. Support legs are fixedly connected to all four sides of the bottom of the workbench 1. A fixing ring 9 is fixedly connected to one side of the top of the workbench 1. A winding assembly 6 is installed on one side of the top of the workbench 1, and a winding assembly 8 is installed inside the winding assembly 6. Side plates 3 are fixedly connected to both ends of the top of the workbench 1. An electric push rod 2 is fixedly connected to one side of one side plate 3. A limit guide assembly 5 is fixedly connected to one end of the electric push rod 2 and one side of the other side plate 3. A top plate 4 is fixedly connected between the tops of the two side plates 3. 4. A spraying assembly 7 is provided at the bottom. Two connecting blocks 10 are fixedly connected to the inner side of the fixing ring 9. A first sliding groove 11 is opened on the top of the connecting block 10. Two adjusting screws 13 are rotatably connected in the first sliding groove 11. The two adjusting screws 13 are fixedly connected to each other through a fourth rotating shaft. The two adjusting screws 13 are symmetrically distributed along the center position of the fourth rotating shaft. The thread directions of the two adjusting screws 13 are opposite. A first screw seat 12 is threadedly connected to the outer surface of the adjusting screw 13. The first screw seat 12 is slidably connected to the first sliding groove 11. A clamping plate 14 is fixedly connected to the top of the first screw seat 12.

[0043] The winding assembly 6 includes a movable lead screw 605. A third slide groove 607 is provided on the top of the worktable 1. The movable lead screw 605 is rotatably connected to the third slide groove 607. A second lead screw seat 606 is threaded onto the outer surface of the movable lead screw 605. The second lead screw seat 606 is slidably connected to the third slide groove 607. A connecting ring 610 is fixedly connected to the top of the second lead screw seat 606. A rotating ring 611 is rotatably connected to one side of the connecting ring 610. A connecting piece 609 is fixedly connected to the top of the connecting ring 610. A rotating rod 608 is rotatably connected between the two side plates 3 via a first rotating shaft. A sleeve 613 is fitted onto the outer surface of the rotating rod 608. The sleeve 613 is rotatably connected to the connecting piece 609 via a first bearing. Both the moving rod 608 and the inner wall of the sleeve 613 have a regular hexagonal cross-section. An external gear ring 612 is engaged with the outer surface of the rotating ring 611. A transmission gear 614 meshes with the top of the external gear ring 612. The transmission gear 614 is engaged with the outer surface of the sleeve 613. One end of the rotating rod 608 extends to one side of the side plate 3 through the first rotating shaft and is fixedly connected to the driven wheel 601. A motor 604 is fixedly installed on one side of the worktable 1 through the mounting plate. One end of the output shaft of the motor 604 extends into the third slide groove 607 through the second rotating shaft and is fixedly connected to one end of the moving screw 605. A driving wheel 603 is engaged with the outer surface of the second rotating shaft. A transmission belt 602 is connected between the driving wheel 603 and the driven wheel 601.

[0044] The spraying assembly 7 includes a storage box 701, the top of which is fixedly connected to the bottom of the top plate 4. A liquid pump 703 is fixedly connected to the bottom of the storage box 701. A telescopic hose 704 is fixedly connected to the bottom of the liquid pump 703. One end of the telescopic hose 704 away from the liquid pump 703 is fixedly connected to one side of the connecting ring 610. A spray pipe 702 is fixedly connected to the inside of the rotating ring 611. A first annular cavity 705 is formed inside the connecting ring 610. A second annular cavity 707 is formed inside the rotating ring 611. A connecting pipe 706 is fixedly connected to one side of the connecting ring 610. The connecting ring 610 and the rotating ring 611 are rotatably connected. The connecting pipe 706 has an annular cross-sectional shape. Both ends of the connecting pipe 706 are connected to the first annular cavity 705 and the second annular cavity 707, respectively. The spray pipe 702 is connected to the second annular cavity 707.

[0045] The specific implementation method is as follows: by setting up the spraying assembly 7, the adhesive in the storage box 701 enters the first annular cavity 705 through the liquid pump 703, and the adhesive enters the second annular cavity 707 from the first annular cavity 705 through the connecting ring 610 and is sprayed out through the spray nozzle 702. The adhesive is sprayed between the pipe to be repaired and the tape, and the adhesive can improve the wrapping and adhesion effect of the tape on the pipe to be repaired.

[0046] The limiting guide assembly 5 includes a connecting platform 501. One side of the connecting platform 501 is fixedly connected to one end of the electric push rod 2 or one side of the side plate 3. A cavity 506 is formed inside the connecting platform 501. A sliding hole is formed on one side of the connecting platform 501, and the sliding hole is connected to the cavity 506. A sliding post 504 is slidably connected in the sliding hole. A fitting rod 503 is fixedly connected to the top of the sliding post 504. A pressing block 507 is fixedly connected to the end of the sliding post 504 away from the fitting rod 503. Pressing wheels 510 are fitted on both sides of the pressing block 507. A connecting rod 511 is fixedly connected to the end of the pressing wheel 510 away from the pressing block 507. A fitting block 502 is fixedly connected to the top of the connecting rod 511. The connecting platform 501... 01. Sliding grooves 505 are provided on both sides of the top, and the sliding grooves 505 are connected to the cavity 506. The sliding column 504 is slidably connected in the sliding groove 505. The connecting rod 511 is fixedly connected to the sliders 512 on both sides. The inner wall of the cavity 506 is provided with the second sliding grooves 513 on both sides. The sliders 512 are slidably connected in the second sliding grooves 513. The first telescopic rod 509 is fixedly connected to one side of the bonding block 502. The end of the first telescopic rod 509 away from the bonding block 502 is fixedly connected to one side of the inner wall of the cavity 506. The outer surface of the first telescopic rod 509 is fitted with a first spring 508. The two ends of the first spring 508 are fixedly connected to one side of the inner wall of the cavity 506 and one side of the bonding block 502, respectively.

[0047] The specific implementation method is as follows: by setting the limiting guide component 5, the electric push rod 2 drives the connecting platform 501 to move and makes one side of the bonding rod 503 fit against the pipe to be repaired. The pipe to be repaired drives the bonding rod 503 to move, and the bonding rod 503 drives the extrusion block 507 to move. The extrusion block 507 drives the bonding block 502 to move through the connecting rod 511 and gradually fits against the inner wall of the pipe, thereby realizing the limiting clamping of the pipe to be repaired, ensuring the stability of the pipe to be repaired, and thus ensuring the repair effect of the tape on the pipe to be repaired.

[0048] The winding assembly 8 includes two connecting frames 805, and a winding roller 806 is rotatably connected between the two connecting frames 805 via a third rotating shaft and a second bearing. Both sides of the winding roller 806 are fitted with a fitting wheel 804. A limiting plate 803 is fixedly connected to the side of the fitting wheel 804 away from the winding roller 806. A second telescopic rod 801 is fixedly connected to the side of the limiting plate 803 away from the fitting wheel 804. One end of the second telescopic rod 801 away from the limiting plate 803 is fixedly connected to the inner side of the rotating ring 611. A second spring 802 is sleeved on the outer surface of the second telescopic rod 801. Both ends of the second spring 802 are fixedly connected to one side of the limiting plate 803 and the inner side of the rotating ring 611, respectively.

[0049] The specific implementation method is as follows: by setting up the winding assembly 6, the motor 604 drives the driven wheel 601 to rotate, the driven wheel 601 drives the sleeve 613 to rotate, the sleeve 613 drives the external toothed ring 612 to rotate, the external toothed ring 612 drives the rotating ring 611 to rotate, and the rotating ring 611 drives the winding roller 806 to rotate around the axis of the pipe to be repaired, so that the tape is wrapped around the outer surface of the pipe to be repaired. In this process, the moving screw 605 drives the connecting ring 610 and the rotating ring 611 to move at a uniform speed through the second screw seat 606, so that the tape can wrap and repair the pipe in all directions and evenly.

[0050] Working principle: During use, the operator adds adhesive to the storage box 701. Then, the operator wraps the tape around the winding roller 806. The bonding wheel 804, driven by the second spring 802, squeezes the tape. Next, the operator passes the pipe to be repaired through the fixing ring 9, rotating ring 611, and connecting ring 610, and then bonds one end of the pipe to the bonding rod 503. At this point, the operator activates the electric push rod 2, which moves the connecting platform 501 and brings one side of the bonding rod 503 to the pipe to be repaired. During the process of the pipe being repaired being fitted together, the fitting rod 503 moves, the fitting rod 503 moves the sliding column 504, the sliding column 504 moves the extrusion block 507, the extrusion block 507 moves the extrusion rollers 510 on both sides to both sides, the extrusion rollers 510 move the connecting rod 511, and the connecting rod 511 moves the fitting block 502 in the sliding groove 505. The fitting block 502 moves and gradually fits against the inner wall of the pipe, thereby achieving the limiting clamping of the pipe to be repaired and ensuring the stability of the pipe to be repaired.

[0051] After clamping the pipe to be repaired, the worker pulls out one end of the tape on the winding roller 806 and places it between the two clamping plates 14. Then, the worker turns a knob, which drives the adjusting screw 13 to rotate. The adjusting screw 13 moves the first screw within the first slide groove 11, causing the first screw seat 12 to move the clamping plates 14 closer together. The two clamping plates 14 clamp and limit the tape. After the clamping plates 14 are in position, the worker starts the motor 604. The motor 604 drives the moving screw 605 to rotate, which in turn moves the second screw seat 606 within the third slide groove 607. During this process, the motor 604 drives the drive wheel 603 to rotate, which in turn drives the driven wheel 601 to rotate via the transmission belt 602. The driven wheel 601 then drives the first rotating shaft... The rotating rod 608 rotates, which drives the sleeve 613 to rotate. The sleeve 613 drives the transmission gear 614 to rotate, which drives the external gear ring 612 to rotate. The external gear ring 612 drives the rotating ring 611 to rotate. The rotating ring 611 drives the winding roller 806 to rotate around the axis of the pipe to be repaired through the connecting frame 805. Driven by the rotating ring 611, the winding roller 806 moves from one side near the fixed ring 9 to the other side, so that the tape is wrapped around the outer surface of the pipe to be repaired. At the same time, the adhesive in the storage box 701 enters the first ring cavity 705 through the liquid pump 703 and the telescopic hose 704, and the adhesive enters the rotating ring 611 through the connecting ring 610 and is sprayed out through the spray nozzle 702. The adhesive is sprayed between the pipe to be repaired and the tape, which accelerates the repair effect of the tape on the pipe to be repaired.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for repairing damaged points of natural gas pipelines near high-voltage DC grounding electrodes, comprising a workbench (1), wherein support legs are fixedly connected to all four sides of the bottom of the workbench (1), characterized in that, A fixing ring (9) is fixedly connected to one side of the top of the workbench (1). A winding assembly (6) is provided on one side of the top of the workbench (1). A winding assembly (8) is provided inside the winding assembly (6). Side plates (3) are fixedly connected to both ends of the top of the workbench (1). An electric push rod (2) is fixedly connected to one side of one of the side plates (3). A limit guide assembly (5) is fixedly connected to one end of the electric push rod (2) and one side of the other side plate (3). A top plate (4) is fixedly connected between the tops of the two side plates (3). A spraying assembly (7) is provided at the bottom of the top plate (4). The winding assembly (6) includes a movable lead screw (605), and a third slide groove (607) is provided on the top of the worktable (1). The movable lead screw (605) is rotatably connected to the third slide groove (607). A second lead screw seat (606) is threadedly connected to the outer surface of the movable lead screw (605). The second lead screw seat (606) is slidably connected to the third slide groove (607). A connecting ring (610) is fixedly connected to the top of the second lead screw seat (606). A rotating ring (611) is rotatably connected to one side of the connecting ring (610). A connecting piece (609) is fixedly connected to the top of the connecting ring (610). A rotating rod (608) is rotatably connected between the two side plates (3) through a first rotating shaft. A sleeve (613) is sleeved on the outer surface of the rotating rod (608). The sleeve (613) is rotatably connected to the connecting piece (609) through a first bearing. The cross-sectional shape of the inner wall of the rotating rod (608) and the sleeve (613) is a regular hexagon. The winding assembly (8) includes two connecting frames (805), and a winding roller (806) is rotatably connected between the two connecting frames (805) via a third rotating shaft and a second bearing. Both sides of the winding roller (806) are fitted with a bonding wheel (804). A limiting plate (803) is fixedly connected to the side of the bonding wheel (804) away from the winding roller (806). A second telescopic rod (801) is fixedly connected to the side of the limiting plate (803) away from the bonding wheel (804). One end of the second telescopic rod (801) away from the limiting plate (803) is fixedly connected to the inner side of the rotating ring (611). A second spring (802) is sleeved on the outer surface of the second telescopic rod (801), and the two ends of the second spring (802) are fixedly connected to one side of the limiting plate (803) and the inner side of the rotating ring (611), respectively. The spraying assembly (7) includes a storage box (701), the top of which is fixedly connected to the bottom of the top plate (4), a liquid pump (703) is fixedly connected to the bottom of the storage box (701), a telescopic hose (704) is fixedly connected to the bottom of the liquid pump (703), one end of the telescopic hose (704) away from the liquid pump (703) is fixedly connected to one side of the connecting ring (610), and a spray pipe (702) is fixedly connected to the inner side of the rotating ring (611). The limiting guide assembly (5) includes a connecting platform (501). One side of the connecting platform (501) is fixedly connected to one end of the electric push rod (2) or one side of the side plate (3). A cavity (506) is opened inside the connecting platform (501). A sliding hole is opened on one side of the connecting platform (501), and the sliding hole is connected to the cavity (506). A sliding column (504) is slidably connected in the sliding hole. A fitting rod (503) is fixedly connected to the top of the sliding column (504). A pressing block (507) is fixedly connected to the end of the sliding column (504) away from the fitting rod (503). Pressing wheels (510) are fitted on both sides of the pressing block (507). The end of the extrusion wheel (510) away from the extrusion block (507) is fixedly connected to a connecting rod (511). The top of the connecting rod (511) is fixedly connected to a fitting block (502). The top two sides of the connecting platform (501) are provided with sliding grooves (505). The sliding grooves (505) are connected to the cavity (506). The sliding column (504) is slidably connected in the sliding groove (505). The two sides of the connecting rod (511) are fixedly connected with sliders (512). The two sides of the inner wall of the cavity (506) are provided with second sliding grooves (513). The sliders (512) are slidably connected in the second sliding grooves (513).

2. The device for repairing damaged points of natural gas pipelines near high-voltage DC grounding electrodes according to claim 1, characterized in that, The outer surface of the rotating ring (611) is engaged with an external gear ring (612), and the top of the external gear ring (612) is engaged with a transmission gear (614). The transmission gear (614) is engaged with the outer surface of the sleeve (613).

3. The device for repairing damaged points of natural gas pipelines near high-voltage DC grounding electrodes according to claim 1, characterized in that, One end of the rotating rod (608) extends to one side of the side plate (3) through the first rotating shaft and is fixedly connected to the driven wheel (601). A motor (604) is fixedly installed on one side of the worktable (1) through the mounting plate. One end of the output shaft of the motor (604) extends into the third slide groove (607) through the second rotating shaft and is fixedly connected to one end of the moving lead screw (605). A driving wheel (603) is snapped onto the outer surface of the second rotating shaft. A transmission belt (602) is connected between the driving wheel (603) and the driven wheel (601).

4. The device for repairing damaged points of natural gas pipelines near high-voltage DC grounding electrodes according to claim 1, characterized in that, The connecting ring (610) has a first annular cavity (705) and the rotating ring (611) has a second annular cavity (707). A connecting pipe (706) is fixedly connected to one side of the connecting ring (610). The connecting ring (610) and the rotating ring (611) are rotatably connected. The connecting pipe (706) has an annular cross-sectional shape. The two ends of the connecting pipe (706) are respectively connected to the first annular cavity (705) and the second annular cavity (707). The nozzle (702) is connected to the second annular cavity (707).

5. The device for repairing damaged points of natural gas pipelines near high-voltage DC grounding electrodes according to claim 1, characterized in that, A first telescopic rod (509) is fixedly connected to one side of the bonding block (502). The end of the first telescopic rod (509) away from the bonding block (502) is fixedly connected to one side of the inner wall of the cavity (506). A first spring (508) is sleeved on the outer surface of the first telescopic rod (509). The two ends of the first spring (508) are fixedly connected to one side of the inner wall of the cavity (506) and one side of the bonding block (502), respectively.

6. The device for repairing damaged points of natural gas pipelines near high-voltage DC grounding electrodes according to claim 1, characterized in that, Two connecting blocks (10) are fixedly connected to the inner side of the fixed ring (9). A first sliding groove (11) is provided on the top of the connecting block (10). Two adjusting screws (13) are rotatably connected in the first sliding groove (11). The two adjusting screws (13) are fixedly connected to each other through a fourth rotating shaft. The two adjusting screws (13) are symmetrically distributed along the center position of the fourth rotating shaft. The threads of the two adjusting screws (13) are opposite. A first screw seat (12) is threadedly connected to the outer surface of the adjusting screw (13). The first screw seat (12) is slidably connected to the first sliding groove (11). A clamping plate (14) is fixedly connected to the top of the first screw seat (12).

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