A trenchless pipe-in-pipe lining welding apparatus

Abstract

This application relates to a trenchless pipeline lining welding device, including a welding device, a feeding device, and a clamping device. The clamping device is used to clamp the pipeline lining to cooperate with the welding device for the welding process. The feeding device is used to push the welded pipeline lining into the pipeline that needs to be repaired. The clamping device includes a first clamping area and a second clamping area, in which a pipeline lining is placed, and the opposite end faces of the two pipeline linings abut against each other to form a weld. The welding device includes a welding torch and a driving device, the driving device being used to drive the welding at the weld. The feeding device includes a first feed position and a second feed position. The feeding device moves from the first feed position to the second feed position to push the pipeline lining in the first clamping area into the second clamping area, and then pushes the pipeline lining in the second clamping area into the pipeline that needs to be repaired.

Description

Technical Field

[0001] This application relates to the technical field of trenchless pipeline repair, and more particularly to a trenchless pipeline lining welding device. Background Technology

[0002] With the rapid development of my country's economy, the total length of existing pipelines has become extremely large. Many underground pipelines have been laid for a long time and exposed to corrosive environments for extended periods. The inner metal walls of these pipelines have become thinned and aged, making them insufficient to continue transporting gases and liquids. Instead, the unusable pipelines lead to leaks of transported gases and liquids, causing environmental pollution. In such cases, open-cut replacement with welded pipes or trenchless repair with welded metal-lined pipes are necessary to repair the corroded pipelines.

[0003] Existing specialized pipeline welding equipment primarily employs external welding methods, while trenchless repair methods rely on manual entry into the pipeline shaft to weld the metal lining from the inside. External welding equipment is unsuitable for trenchless pipeline lining repair projects. Manually entering the complex underground pipeline environment to perform welding work is labor-intensive and highly dangerous. Therefore, it is necessary to develop an internal pipeline welding device for trenchless pipeline metal lining welding. Summary of the Invention

[0004] In view of the above practical problems and the shortcomings of the existing technology, the main technical problem to be solved by the present invention is to provide a trenchless pipeline lining welding equipment that can replace manual labor to complete the welding of pipeline linings and the repair of pipeline linings to underground pipelines.

[0005] To solve the above-mentioned technical problems, this application provides a trenchless pipeline lining welding device, which adopts the following technical solution:

[0006] A trenchless pipeline lining welding device includes a welding device, a feeding device, and a clamping device; the clamping device is used to clamp the pipeline lining to cooperate with the welding device for the welding process, and the feeding device is used to push the welded pipeline lining into the pipeline that needs to be repaired.

[0007] The clamping device includes a first clamping area and a second clamping area, and a pipe liner is placed in each of the first clamping area and the second clamping area, and the opposite end faces of the two pipe liners abut against each other to form a weld.

[0008] The welding device includes a welding torch and a driving device, the driving device being used to drive the weld seam to perform welding.

[0009] The feeding device includes a first feeding position and a second feeding position. The feeding device moves from the first feeding position to the second feeding position to advance the pipe liner on the first clamping area to the second clamping area, and then advances the pipe liner on the second clamping area into the pipe that needs to be repaired.

[0010] In a preferred embodiment, the system further includes an integral frame, the clamping device is horizontally disposed on the integral frame, the feeding device is disposed below the clamping device, and the welding device is disposed opposite to the pipe to be repaired on one side of the clamping device.

[0011] The overall frame is equipped with height-adjustable support legs, so that the height is adjusted so that the pipe liner on the clamping device corresponds to the position of the pipe to be repaired.

[0012] In a preferred embodiment, the driving device includes a welding torch feeding device and a welding torch lifting device. The welding torch feeding device advances the welding torch to the weld in the horizontal direction, and the welding torch lifting device adjusts the height of the welding torch in the vertical direction.

[0013] In a preferred embodiment, the welding torch feeding device is fixed on the welding torch lifting device, and the welding torch feeding device includes a rotatable welding platform;

[0014] The welding platform is connected to the welding torch, and the welding torch is driven to rotate 360° at a fixed point on a plane perpendicular to the ground.

[0015] In a preferred embodiment, the welding platform is provided with a radial telescopic member, and the welding torch is fixed to the telescopic end of the radial telescopic member;

[0016] When the welding platform is positioned at the center of the pipe liner, the radial telescopic component drives the welding torch to adapt to the radius of the pipe liner until the welding point of the welding torch contacts the weld seam of the pipe liner.

[0017] In a preferred embodiment, both the first clamping area and the second clamping area include two semi-circular limiting members and a clamp disposed on one of the limiting members;

[0018] The clamp has an opening and closing mechanism. In the closed state, the clamp holds the pipe liner and fixes it on the limiting member; in the open state, it is used for feeding and pushing the pipe liner.

[0019] In a preferred embodiment, the clamps in the first clamping area and the second clamping area are arranged adjacent to each other, and a lever device is provided on both sides of the clamp to control the opening and closing of the clamp; the two clamps open and close synchronously.

[0020] In a preferred embodiment, the clamp is provided with two clamping arms corresponding to the lever arm devices on both sides of it, and the lever arm device includes a telescopic motor and a connecting rod fixed to the telescopic end of the telescopic motor.

[0021] The connecting rod is used to connect the clamping arms corresponding to the first clamping area and the second clamping area on the same side to form synchronous opening and closing.

[0022] In a preferred embodiment, the clamping arm and its corresponding semi-circular limiting member form a ring clamp.

[0023] In a preferred embodiment, the feeding device includes a hydraulic cylinder and a push plate disposed at the output end of the hydraulic cylinder; the hydraulic cylinder drives the push plate to move horizontally back and forth to a first feed position or a second feed position;

[0024] When the feeding device is in the first feed position, the push plate abuts against the end face of the pipe liner located in the first clamping area, which is the end face of the pipe liner away from the weld.

[0025] In summary, this application has the following beneficial effects:

[0026] This invention provides a welding equipment that can form an assembly line for welding and repairing damaged pipelines, meeting the needs of pipeline repair for a certain length. This equipment replaces manual labor to enter underground pipelines to complete pipeline welding work, and construction personnel only need to operate the equipment, thus effectively ensuring personal safety. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the pipe lining welding equipment in this embodiment;

[0028] Figure 2 This is a schematic diagram of the clamping device in the pipe lining welding equipment of this embodiment;

[0029] Figure 3 This is a schematic diagram of the fixture in the pipe lining welding equipment of this embodiment;

[0030] Figure 4 This is a schematic diagram of the feeding device in the first feed position in the pipe lining welding equipment of this embodiment;

[0031] Figure 5 This is a schematic diagram of the feeding device in the second feed position of the pipe lining welding equipment in this embodiment;

[0032] Figure 6 This is a schematic diagram of the welding device in the pipe lining welding equipment of this embodiment;

[0033] Figure 7 This is a schematic diagram of the radial expansion joint in the pipe lining welding equipment of this embodiment.

[0034] Explanation of reference numerals in the attached drawings: 1. Welding device; 11. Welding torch; 12. Welding torch feed device; 121. Feed hydraulic cylinder; 13. Welding torch lifting device; 131. Welding lifting motor; 14. Welding platform; 15. Rotating component; 16. Radial telescopic component; 2. Clamping device; 21. First clamping area; 22. Second clamping area; 23. Limiting component; 24. Clamping arm; 25. Lever arm device; 26. Telescopic motor; 27. Connecting rod; 3. Feeding device; 31. First feed position; 32. Second feed position; 33. Hydraulic cylinder; 34. Push plate; 4. Overall frame; 41. Support leg. Detailed Implementation

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed", "equipped", "sleeved / connected", "connected", etc., should be interpreted broadly. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral 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 a connection within two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0038] The following is in conjunction with the appendix Figure 1 Section 7 provides further details regarding this application.

[0039] This application discloses a trenchless pipeline lining welding device, mainly consisting of an integral frame 4 and a welding device 1, a feeding device 3, and a clamping device 2 mounted on the integral frame 4. The clamping device 2 is horizontally mounted on the integral frame 4, the feeding device 3 is positioned below the clamping device 2, and the welding device 1 is positioned opposite the pipeline to be repaired on one side of the clamping device 2; wherein:

[0040] The overall frame 4 is equipped with height-adjustable support legs, so that the height is adjusted so that the pipe liner on the clamping device 2 corresponds to the position of the pipe to be repaired.

[0041] The clamping device 2 includes a first clamping area 21 and a second clamping area 22. The clamping areas of the clamping device 2 are used to clamp two pipe liners respectively and fix the two pipe liners in place to cooperate with the welding device 1 for welding. Specifically, a pipe liner is placed in each of the first clamping area 21 and the second clamping area 22, and the opposite end faces of the two pipe liners abut against each other to form a weld, and the welding process is performed at the weld.

[0042] The welding device 1 includes a welding torch 11 and a driving device. The driving device is used to drive the welding seam to perform welding, and the welding torch 11 is used to weld the inner lining of the metal pipe.

[0043] The feeding device 3 is used to push the welded pipe liner into the pipe that needs to be repaired. The feeding device 3 is provided with a first feeding position 31 and a second feeding position 32. The feeding device 3 moves from the first feeding position 31 to the second feeding position 32 to push the pipe liner on the first clamping area 21 into the second clamping area 22, and then pushes the pipe liner on the second clamping area 22 into the pipe that needs to be repaired.

[0044] In this embodiment, the height-adjustable support legs are provided, with large bolt adjustment components on each support leg. To address the horizontal height difference between the pipe to be repaired and the metal pipe lining automatically welded by the equipment in different working environments, and to handle uneven ground during construction, height-adjustable support legs are configured. The height of each support leg can be adjusted using a dedicated large wrench, thereby adjusting the overall level of the equipment to adapt to different terrain working environments.

[0045] In this embodiment, the clamping device 2 provided is provided with two semi-circular limiting members 23 and a clamp on one of the limiting members 23 in the corresponding first clamping area 21 and second clamping area 22. The clamp is used to fix the pipe lining during welding. Therefore, when it is set, the clamps in the first clamping area 21 and the second clamping area 22 are arranged adjacent to each other, and the clamps are arranged on both sides near the weld.

[0046] Furthermore, the clamp is designed with an opening and closing function. In the open state, it is used for feeding and advancing the pipe liner; in the closed state, it clamps and fixes the pipe liner, and the welding process is performed while the liner is clamped and fixed. Lifting arms 25 are provided on both sides of the clamp to control its opening and closing; the two clamps open and close synchronously, and the lifting arms 25 assist the clamps in pressing and fixing the metal pipe liner to be welded.

[0047] The specific structure of the clamp is configured as follows: two semi-circular limiting members 23 on the first clamping area 21 or the second clamping area 22, with the clamp mounted on one of the limiting members 23 near the weld seam. The clamp has two clamping arms 24 on the lever arm devices 25 on both sides, which open and close. The two clamping arms 24 are respectively hinged to both ends of the semi-circular limiting member 23, opening and closing at the hinged ends. The two clamping arms 24 and their corresponding semi-circular limiting members 23 form a ring clamp for holding the inner lining of the metal pipe to be welded.

[0048] The clamping mechanism is driven as follows: The lever arm device 25 includes a telescopic motor 26 and a connecting rod 27 fixed to the telescopic end of the telescopic motor 26; In order to achieve synchronous opening and closing of the two clamps, the clamping arms 24 on the same side of the first clamping area 21 and the second clamping area 22 are connected by the connecting rod 27. The telescopic end of the telescopic motor 26 is fixed in the middle of the connecting rod 27. The lever arm devices 25 on both sides are driven synchronously, and the telescopic motor 26 drives the clamping to achieve the opening and closing movement.

[0049] In this embodiment, the provided driving device includes a welding torch feeding device 12 and a welding torch lifting device 13. The welding torch feeding device 12 pushes the welding torch 11 horizontally to the weld seam where the two pipe liners abut. The welding torch lifting device 13 adjusts the height of the welding torch 11 vertically so that the centerline of the welding torch 11 can be aligned with the centerline of the pipe liners, which facilitates the welding torch feeding device 12 to push the welding torch 11 horizontally.

[0050] Furthermore, the welding torch feed device 12 is fixed on the welding torch lifting device 13. The welding torch feed device 12 includes a rotatable welding platform 14. The welding torch 11 is connected to the rotatable rotating part 15 provided on the welding platform 14, and the welding torch 11 is driven to rotate 360° at a fixed point on a plane perpendicular to the ground, so as to realize the circumferential welding of the pipe lining at the weld seam along the circular inner wall of the pipe lining.

[0051] The welding torch feeding device 12 includes a feeding hydraulic cylinder 121 that pushes the welding torch 11 and the welding platform 14 to move laterally and horizontally. The welding torch lifting device 13 includes a welding lifting motor 131 that provides power for vertical movement of the welding torch feeding device 12, the welding platform 14, and the welding torch 11.

[0052] Furthermore, the welding platform 14 is equipped with a radial telescopic member 16, and the welding torch 11 is fixed to the telescopic end of the radial telescopic member 16. The radial telescopic member 16 includes a telescopic motor that provides lateral horizontal telescopic extension. When the welding platform 14 corresponds to the center of the pipe liner, the radial telescopic member 16 drives the welding torch 11 to adapt to the radius of the pipe liner until the welding point of the welding torch 11 abuts against the weld seam of the pipe liner. In this embodiment, the radial telescopic member 16 is used to meet the welding process of pipe liners with different diameters.

[0053] In this embodiment, the provided feeding device 3 includes a hydraulic cylinder 33 and a push plate 34 disposed at the output end of the hydraulic cylinder 33; the hydraulic cylinder 33 drives the push plate 34 to move horizontally back and forth to the first feed position or the second feed position; when the feeding device 3 is located at the first feed position 31, the push plate 34 abuts against the end face of the pipe liner located on the first clamping area 21, the end face being the end face of the pipe liner away from the weld.

[0054] The trenchless pipe lining welding equipment provided in this embodiment is implemented as follows:

[0055] Start the pipe lining welding equipment, place the metal pipe lining on the clamp and fix it. The ring part of the clamp can be opened from the middle to the left and right sides of the equipment by clamping arms 24, which facilitates the placement of the metal pipe lining to be welded and the pushing of the welded metal pipe into the pipe that needs to be repaired. The lever arm device 25 fixed on both sides of the arc-shaped clamping arms 24 to the overall frame 4 assists in pressing and fixing the metal lining to be welded.

[0056] The welding torch lifting device 13 is activated, and the welding platform 14 is adjusted to a height corresponding to the inner diameter of the metal pipe lining to be welded. The welding torch feed device 12 extends, and the welding platform 14 and the welding torch 11 are horizontally delivered to the weld joint of the metal pipe lining to be welded. Under the action of the welding platform 14, the welding torch 11 moves in an arc vertically to the ground to weld the gap at the joint of the metal pipe lining.

[0057] After welding is completed, the welding torch 11 is retrieved, the lever assembly is used to relieve the force on the clamping arm 24, the annular clamp is opened, and the electric push cylinder of the lower feed device 3 moves horizontally to drive the push plate 34 to push out the welded metal pipe liner. The metal pipe liner in the first clamping area 21 is pushed to the second clamping area 22, and the metal pipe liner in the second clamping area 22 is pushed into the pipe that needs to be repaired. At this time, a new metal pipe liner to be welded can be placed on the clamp in the first clamping area 21, and the welding of the metal pipe liners in the two areas can be started again.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A trenchless pipeline lining welding device, characterized in that: The system includes a welding device, a feeding device, and a clamping device. The clamping device holds the pipe liner for welding, and the feeding device pushes the welded pipe liner into the pipe to be repaired. The clamping device is horizontally positioned, and the feeding device is positioned below it. The clamping device includes a first clamping area and a second clamping area, each containing a pipe liner with its opposite end faces abutting to form a weld. The welding device includes a welding torch and a driving device, which drives the welding torch to weld at the weld. The feeding device includes a first feed position and a second feed position, and the feeding device moves from the first feed position to the second feed position to push the pipe liner in the first clamping area. The pipe liner is advanced into the second clamping area and then into the pipe to be repaired. The clamping device can open to the left and right sides of the equipment to place the pipe liner to be welded and to drive the feeding device to advance the welded pipe liner into the pipe to be repaired. After the pipe liner in the first clamping area is advanced into the second clamping area, the pipe liner can continue to be placed in the first clamping area for continuous welding and advancement. The feeding device includes a hydraulic cylinder and a push plate disposed at the output end of the hydraulic cylinder. The push plate is driven by the hydraulic cylinder to move horizontally back and forth to the first feed position or the second feed position. When the feeding device is in the first feed position, the push plate abuts against the end face of the pipe liner located in the first clamping area. This end face is the end face of the pipe liner away from the weld.

2. The trenchless pipe lining welding equipment according to claim 1, characterized in that: It also includes an overall frame, the clamping device is horizontally mounted on the overall frame, and the welding device is mounted opposite to the pipe to be repaired on one side of the clamping device; the overall frame is provided with height-adjustable support legs, so that the height is adjusted so that the pipe liner on the clamping device corresponds to the position of the pipe to be repaired.

3. The trenchless pipe lining welding equipment according to claim 1, characterized in that: The driving device includes a welding torch feeding device and a welding torch lifting device. The welding torch feeding device advances the welding torch to the weld in the horizontal direction, and the welding torch lifting device adjusts the height of the welding torch in the vertical direction.

4. The trenchless pipeline lining welding equipment according to claim 3, characterized in that: The welding torch feeding device is fixed on the welding torch lifting device. The welding torch feeding device includes a rotatable welding platform. The welding torch is connected to the welding platform and the welding torch is driven to rotate 360° at a fixed point on a plane perpendicular to the ground.

5. The trenchless pipeline lining welding equipment according to claim 4, characterized in that: The welding platform is equipped with a radial telescopic component, and the welding torch is fixed to the telescopic end of the radial telescopic component. When the welding platform is located at the center of the pipe lining, the radial telescopic component drives the welding torch to adapt to the radius of the pipe lining until the welding point of the welding torch abuts against the weld seam of the pipe lining.

6. The trenchless pipe lining welding equipment according to claim 1, characterized in that: Both the first clamping area and the second clamping area include two semi-circular limiting members and a clamp disposed on one of the limiting members; the clamp has an opening and closing function, and in the closed state, the clamp is used to clamp the pipe liner and fix it on the limiting member; in the open state, it is used for feeding and pushing the pipe liner.

7. The trenchless pipe lining welding equipment according to claim 6, characterized in that: The clamps in the first clamping area and the second clamping area are arranged adjacent to each other, and a lever device is provided on both sides of the clamp to control the opening and closing of the clamp; the two clamps open and close synchronously.

8. A trenchless pipeline lining welding device according to claim 7, characterized in that: The clamp is provided with two clamping arms corresponding to the lever arm devices on both sides. The lever arm device includes a telescopic motor and a connecting rod fixed to the telescopic end of the telescopic motor. The connecting rod is used to connect the clamping arms corresponding to the first clamping area and the second clamping area on the same side to form synchronous opening and closing.

9. A trenchless pipeline lining welding device according to claim 8, characterized in that: The clamping arm and its corresponding semi-circular limiting member form a ring clamp.

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