A pipe work hoisting apparatus

Abstract

The present application relates to the field of hoisting, especially to a hoisting equipment for pipeline operation, comprising a hanger, a crossbeam, a lifting rope and an electric reel, etc.; the crossbeam is fixedly connected to the hanger; two electric reels are installed on the left side and the right side of the crossbeam respectively; one lifting rope is wound on each electric reel; two lifting ropes on the same side are connected to a sliding frame; two guide wheels are rotatably connected to the sliding frame; a winding groove is formed on the sliding frame, and the guide wheels are rotatably connected in the winding groove; a plurality of sliding blocks one are slidably connected to the sliding frame; a through groove is formed on the sliding block one. By pulling the lifting rope tightly, the sliding block two and the sliding block one are synchronously pulled to move towards the middle part of the sliding frame, the spring is stretched, and then the lowermost pipeline moves towards the middle part, so that the lowermost pipelines move towards each other and contact during hoisting, and are arranged in order and closely contact.

Description

Technical Field

[0001] This invention relates to the field of hoisting, and more particularly to a hoisting device for pipeline operations. Background Technology

[0002] During pipeline laying, repair, and replacement operations, it is usually necessary to lift and move the pipelines to the construction area. During site operations, the pipelines are temporarily unloaded and stacked in a triangular formation in an open area. When the pipelines need to be moved quickly, in order to improve lifting efficiency, workers will use ropes to tie the stacked pipelines together, and then use lifting equipment to lift and move the entire stack of pipelines. However, because the pipelines are directly stacked on the ground, the gap between the bottom layer of pipelines and the ground is narrow, making it difficult for workers to pass the ropes through the bottom. This makes the tying operation cumbersome, time-consuming, and difficult to ensure that the tying is secure, posing a risk of pipeline slippage during lifting and affecting the overall lifting safety.

[0003] In summary, this application proposes a hoisting device for pipeline operations to solve the aforementioned technical problems. Summary of the Invention

[0004] To overcome the drawbacks of workers having difficulty passing ropes through the bottom, resulting in cumbersome and time-consuming binding operations, difficulty in ensuring secure binding, and the risk of pipe slippage during hoisting, which affects the overall hoisting safety, this invention provides a hoisting device for pipe operations.

[0005] The technical solution of this invention is as follows: a lifting device for pipeline operations, comprising a hanger, a crossbeam, lifting ropes, and an electric retractor; a crossbeam is fixedly connected to the hanger; two electric retractors are installed on the left and right sides of the crossbeam; each electric retractor winds up a lifting rope; a slide is also included; two lifting ropes on the same side are connected to a slide; two guide wheels are rotatably connected to the slide; a rope winding groove is opened on the slide, and a guide wheel is rotatably connected in the rope winding groove; several sliding blocks are slidably connected to the slide; each sliding block has a rope passage groove; each sliding block is equipped with an internal support clamp for fixing the pipeline; two sliding blocks are slidably connected to the slide, and all sliding blocks are located between two sliding blocks; each sliding block is fixedly connected to a pressure plate for pushing the pipeline; the lifting rope passes around the guide wheel, enters from the rope winding groove, passes around the guide wheel in the rope winding groove, and then passes through several rope passage grooves to be fixedly connected to the sliding block; each sliding block is fixedly connected to two springs, and the springs are fixedly connected to the slide.

[0006] The present invention achieves the effect of lifting by pushing the pipes into contact with each other through the above structure.

[0007] Preferably, the internal support clamp consists of a fixed rod, a first hinge plate, a rotating rod, a limiting ring, a rotating ring, a second hinge plate, and a support plate; the first sliding block is fixedly connected to the fixed rod; the fixed rod is rotatably connected to four first hinge plates; the fixed rod is rotatably connected to a rotating rod; the rotating rod is fixedly connected to two limiting rings; the rotating rod is rotatably connected to a rotating ring, and the rotating ring is located between the two limiting rings; the rotating ring is rotatably connected to four second hinge plates; each first hinge plate and its corresponding second hinge plate are rotatably connected to a support plate for supporting and fixing the pipe.

[0008] Preferably, it also includes a push plate, a plug plate, and a plug rod; the sliding block has two pairs of plug slots; each pair of plug slots is slidably connected to a plug plate, and the plug plate has several plug holes; each plug plate is fixedly connected to a push plate, and the push plate has a groove corresponding to the position of the rope passage groove; the sliding block has a plug hole, and a plug rod is inserted into the plug hole.

[0009] The present invention achieves the effect of adjusting the position of the push plate by adopting the above structure.

[0010] Preferably, it also includes a rack, a gear, a gear ring, a mounting rod, and a limiting plate; the mounting rod is rotatably connected to both the sliding block two and the pressing plate; the rack is fixedly connected to the slide; the gear ring is fixedly connected to the mounting rod; the gear is rotatably connected to the sliding block two, and the gear meshes with the gear ring and the gear meshes with the rack; the limiting plate for limiting both sides of the pipe is fixedly connected to the mounting rod.

[0011] Preferably, it also includes a movable block and a pressing block; the limiting plate has a sliding groove; several movable blocks are slidably connected at the sliding groove; each movable block is fixedly connected to a pressing block, and the pressing block is made of rubber.

[0012] Preferably, it also includes elastic telescopic rods and rollers; several elastic telescopic rods are fixedly connected to the lower side of the carriage; each elastic telescopic rod has a roller rotatably connected to its telescopic section.

[0013] The present invention achieves the effect of restricting the pressure on the side of the pipe by adopting the above structure.

[0014] Preferably, the opposing sides of the two pressing plates are both curved surfaces.

[0015] Preferably, the limiting plate has two rubber strips on one side with the groove, and the moving block is located between the two rubber strips.

[0016] Preferably, it also includes clamping plates; two clamping plates are rotatably connected to the left and right sides of the crossbeam, and the clamping plates are distributed in a figure-eight pattern.

[0017] Preferably, it also includes an elastic gasket; an elastic gasket is fixed between each pair of corresponding plates, and the elastic gasket is C-shaped.

[0018] By employing the above-described structure, this invention applies downward pressure to the pipeline, thereby improving its stability.

[0019] The beneficial effects of this invention are as follows: by tightening the lifting rope, sliding block two and sliding block one are simultaneously pulled towards the center of the slide, the spring is stretched, thereby causing the lowest layer of pipes to move towards the center. During the lifting process, the lowest layer of pipes move towards each other and come into contact, arranging themselves neatly and in close contact. This allows the weight of the upper layer of pipes to be evenly distributed to each pipe in the lowest layer, thereby reducing the risk of local overload, pipe end deformation, or tearing of the lifting point. It also generates lateral contact force between adjacent pipes, achieving self-stabilization of the pipes and improving their anti-swaying ability.

[0020] The crossbeam applies downward pressure to the entire stack of pipes, and the slide supports and fixes the bottom layer of pipes, thus fixing and limiting the entire stack of pipes. The clamps distributed in a figure-eight pattern restrict the two sides of the entire stack of pipes. With the fixation of the limiting plates, the displacement of the pipes is reduced and the overall stability is improved. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of the hoisting equipment for pipeline operations disclosed in this invention; Figure 2 This is a diagram showing the alignment of the internal support clamp disclosed in this invention with the opening of the lowest-level pipe. Figure 3 This is a schematic diagram of the structure of the carriage, sliding block one, and sliding block two assembly disclosed in this invention; Figure 4 This is a schematic diagram of the structure of the combination of the suspension rope, sliding block one, and sliding block two disclosed in this invention; Figure 5 This is a schematic diagram of the specific structure of the sliding block 1 disclosed in this invention; Figure 6 This is a schematic diagram of the specific structure of the internal support clamp disclosed in this invention; Figure 7 This is a schematic diagram of the internal structure of the sliding block 2 and the pressing plate disclosed in this invention; Figure 8 This is a schematic diagram of the structure of the combination of the limiting plate, the moving block and the pressing block disclosed in this invention; Figure 9 This is a schematic diagram of the structure of the electric winding device, clamping plate and elastic pad assembly disclosed in this invention.

[0022] Explanation of reference numerals in the attached drawings: 1-Hanger, 2-Crossbeam, 3-Hanging rope, 4-Slide, 5-Sliding block one, 6-Inner support clamp, 7-Sliding block two, 8-Pressure plate, 9-Spring, 101-Push plate, 102-Plug-in plate, 103-Plug-in rod, 111-Rack, 112-Gear, 113-Gear ring, 114-Mounting rod, 115-Limiting plate, 116-Moving block, 117-Extrusion block, 121 - Elastic telescopic rod, 122- Roller, 201- Electric rewinder, 202- Clamping plate, 203- Elastic pad, 41- Guide wheel, 42- Rope winding groove, 51- Rope passage groove, 52- Insertion groove, 60- Fixing rod, 61- Hinge plate one, 62- Rotating rod, 63- Limiting ring, 64- Rotating ring, 65- Hinge plate two, 66- Support plate, 11501- Slide groove, 11502- Rubber strip. Detailed Implementation

[0023] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0024] Example 1: A hoisting device for pipeline operations, referring to... Figures 1-9 As shown, the system includes a hanger 1, a crossbeam 2, a lifting rope 3, and an electric winder 201. The crossbeam 2 is fixedly connected to the hanger 1. Two electric winders 201 are installed on the left and right sides of the crossbeam 2. Each electric winder 201 winds up a lifting rope 3. The system also includes a slide 4. Two lifting ropes 3 located on the same side are connected to a slide 4. Two guide wheels 41 are rotatably connected to the slide 4. The slide 4 has a rope winding groove 42, and the guide wheels 41 are rotatably connected in the rope winding groove 42. Several sliding blocks 5 are slidably connected to the slide 4. The sliding blocks 5 have a rope guide. The slide 4 has two sliding blocks 7 slidably connected to it, and all sliding blocks 5 are located between the two sliding blocks 7. Each sliding block 7 is fixedly connected to a pressure plate 8 for pushing the pipe. The suspension rope 3 passes around the guide wheel 41, enters through the rope groove 42, passes around the guide wheel 41 in the rope groove 42, and then passes through several rope grooves 51 and is fixedly connected to the sliding block 7. Each sliding block 7 is fixedly connected to two springs 9, and the springs 9 are fixedly connected to the slide 4.

[0025] The internal support clamp 6 consists of a fixed rod 60, a hinge plate 61, a rotating rod 62, a limiting ring 63, a rotating ring 64, a second hinge plate 65, and a support plate 66. The sliding block 5 is fixedly connected to the fixed rod 60. The fixed rod 60 is rotatably connected to four hinge plates 61. The fixed rod 60 is rotatably connected to the rotating rod 62. The rotating rod 62 is fixedly connected to two limiting rings 63. The rotating rod 62 is rotatably connected to the rotating ring 64, and the rotating ring 64 is located between the two limiting rings 63. The rotating ring 64 is rotatably connected to four second hinge plates 65. Each hinge plate 61 and its corresponding second hinge plate 65 are rotatably connected to a support plate 66.

[0026] It also includes a push plate 101, a plug-in plate 102, and a plug rod 103; the sliding block 5 has two pairs of plug-in slots 52; each pair of plug-in slots 52 is slidably connected to a plug-in plate 102, and the plug-in plate 102 has several plug holes; each plug-in plate 102 is fixedly connected to a push plate 101, and the push plate 101 has a groove corresponding to the position of the rope groove 51; the sliding block 5 has a plug hole, and the plug rod 103 is inserted into the plug hole.

[0027] It also includes a rack 111, a gear 112, a gear ring 113, a mounting rod 114, and a limiting plate 115; the mounting rod 114 is rotatably connected to the sliding block 7 and the pressing plate 8; the rack 111 is fixedly connected to the slide 4; the gear ring 113 is fixedly connected to the mounting rod 114; the gear 112 is rotatably connected to the sliding block 7, and the gear 112 meshes with the gear ring 113 and the gear 112 meshes with the rack 111; the limiting plate 115 is fixedly connected to the mounting rod 114.

[0028] It also includes a movable block 116 and a pressing block 117; the limiting plate 115 has a sliding groove 11501; several movable blocks 116 are slidably connected at the sliding groove 11501; each movable block 116 is fixedly connected to a pressing block 117, and the pressing block 117 is made of rubber.

[0029] It also includes elastic telescopic rods 121 and rollers 122; several elastic telescopic rods 121 are fixedly connected to the lower side of the slide 4; each elastic telescopic rod 121 is rotatably connected to a roller 122 in its telescopic part.

[0030] Both pressing plates 8 have curved surfaces on their opposing sides, which increases the contact area with the pipe and improves the fixing effect.

[0031] Two rubber strips 11502 are provided on one side of the limiting plate 115 with the sliding groove 11501, and the moving block 116 is located between the two rubber strips 11502. The rubber strips 11502 can deform to fit the pipe and improve the fixing effect.

[0032] First, connect the hanger 1 to the hoisting equipment. Use the hoisting equipment to move the hanger 1 above the pipe stack. Then lower the hanger 1 until the slide 4 contacts the ground, slack off the hoisting rope 3. Next, workers move the two slides 4 to both sides of the pipe openings and move the sliding block 7 to move the pressing plate 8 to both sides of the bottommost pipe. Figure 2 As shown, the worker then pushes the sliding block 5 along the slide 4, aligning the inner support clamp 6 with the opening of the lowest pipe. Then, the entire slide 4 is pushed closer to the pipe until it is flush with the pipe opening, allowing the inner support clamp 6 to extend into the opening of the lowest pipe. Figure 1As shown, the workers then rotate the rotating rods 62 one by one. The rotating rods 62 drive the rotating rings 64 to move, causing the hinge plates 61 and 65 to rotate, lifting the support plate 66 and bringing it into contact with the inner wall of the pipe, thus fixing the bottommost pipe. Then, the hoisting equipment is started, moving the crossbeam 2 upwards. The hoisting ropes 3 tighten, causing the slide 4 and the fixed bottommost pipe to move upwards. The bottommost pipe then moves the other pipes above it upwards, thus achieving the hoisting of all pipes. However, considering that the spacing between the bottommost pipes varies when the pipes are stacked on the ground, and that the bottommost pipe is subjected to the load of the pipes above it, the force on the upper pipes is easily concentrated during the hoisting process. At the lowest level of the pipe, overload deformation or tearing of the lifting point occurred. Therefore, initially, the two push plates 101 on the sliding block 5 were aligned with the outer wall of the lowest level pipe on the side opposite to the sliding block 5. After the slide frame 4 was in contact with the pipe opening and the inner support clamp 6 fixed the lowest level pipe, the hoisting equipment lifted the hanger 1 and tightened the hoisting rope 3. During the tightening of the hoisting rope 3, the hoisting rope 3 first pulled the sliding block 7 and the pressing plate 8 towards the middle of the slide frame 4 until the arc-shaped surface of the pressing plate 8 contacted the side of the lowest level pipe. As the hoisting rope 3 continued to tighten, it pulled the sliding block 7 to continue moving and pushed the side of the lowest level pipe through the pressing plate 8. The pipe moves towards the center until it contacts an adjacent pipe. At this point, sliding block 2 7 contacts the push plate 101 on the adjacent sliding block 1 5. Sliding block 2 7 pushes sliding block 1 5 towards the center of the slide frame 4, and simultaneously pushes the pipe fixed by the inner support clamp 6 on sliding block 1 5 towards the center, so that it contacts the next adjacent pipe. At this point, the push plate 101 of sliding block 1 5 contacts the push plate 101 of the next sliding block 1 5, and then sliding block 1 5 pushes the next sliding block 1 5 towards the center of the slide frame 4, and also pushes the next bottommost pipe towards the center. Thus, during the lifting process, by tightening the lifting rope 3, the slide is pulled simultaneously. Moving block 2 7 and sliding block 1 5 move toward the center of the slide 4, stretching spring 9 and pushing the bottom layer of pipes toward the center. This causes the bottom layer of pipes to move toward each other and make contact during the lifting process, arranging them neatly and in close contact. This distributes the weight of the upper layer of pipes evenly to the bottom layer of pipes, reducing the risk of local overload, pipe end deformation, or tearing of the lifting point. It also creates lateral contact force between adjacent pipes, achieving self-stabilization of the pipes and improving their anti-sway capability. When sliding block 1 5 makes contact with each other through push plate 101, the lifting rope 3 is continuously tightened, lifting the slide 4 and the pipes, and then transferring the entire batch of stacked pipes.

[0033] Furthermore, before use, the staff pushes the plug plate 102 to move within the plug slot 52 according to the pipe diameter, and inserts the plug rod 103 into the plug hole to fix the plug plate 102, thereby adjusting the distance between the two push plates 101 on the sliding block 5 to adapt to various pipe sizes and improve the overall adaptability of the equipment.

[0034] Meanwhile, considering that when the lowest-level pipe connects to the upper-level pipe, the upper-level pipe is not yet stable during the process of pushing the lowest-level pipe to move towards contact, and is prone to rolling off; therefore, when the lifting rope 3 pulls the sliding block 7 and the pressing plate 8 to move, the sliding block 7 and the pressing plate 8 simultaneously drive the mounting rod 114 and the limiting plate 115 to move, and the rack 111, gear 112 and gear ring 113 mesh with each other. During the movement of the mounting rod 114, the mounting rod 114 and the limiting plate 115 rotate towards the pipe surface, so that the rubber strip 11502 on the limiting plate 115 contacts the pipe and deforms and presses against the pipe surface, thus restricting the upper-level pipe during the process of pushing the lowest-level pipe to move towards contact, preventing the pipe from rolling off, and providing buffer protection for the pipe; and before use, the operator actively pushes the moving block 116 to the limiting position according to the pipe diameter. The plate 115 moves, aligning the extrusion block 117 with the contact points of two adjacent pipes. When the limiting plate 115 rotates and contacts the upper pipe, the rubber extrusion block 117 deforms and engages with the contact points of the two adjacent pipes, providing additional support between them. This not only alleviates the load on the lower pipes but also improves the stability of the entire pile of pipes during hoisting. It is important to note that the moving block 116 is located between the two rubber strips 11502. Workers can overcome the resistance of the rubber strips 11502 to push the moving block 116 and adjust the position of the extrusion block 117. After adjustment, the extrusion block 117 remains stationary due to the resistance of the rubber strips 11502, preventing it from sliding during the rotation of the limiting plate 115. This ensures that the extrusion block 117 can be precisely engaged between the two adjacent pipes.

[0035] Furthermore, by tightening the lifting rope 3 during hoisting, the limiting plate 115 and the pressing block 117 are simultaneously deformed and pressed against the side of the pipe as the lowest layer of pipes moves towards each other and comes into contact. This allows the rotating limiting plate 115 to be directly locked after hoisting by the lifting rope 3, thus improving the overall stability of the hoisting.

[0036] Once the entire stack of pipes is hoisted to the designated position, the hoisting equipment is controlled to lower the pipes. During the lowering process, the rollers 122 on the lower side of the slide 4 first contact the ground, and as the pipes continue to fall, the elastic telescopic rod 121 retracts until the pipes contact the ground, thereby buffering the force on the entire pipe and reducing damage to the pipes due to inertia. After the entire stack of pipes is lowered, when the hoisting rope 3 is in a slack state, the spring 9 rebounds and resets, causing the sliding block 7 and the pressure plate 8 to move and detach from the bottommost pipe. Subsequently, the workers reverse the rotation rod 62 to release the fixation on the pipes, and then remove the inner support clamp 6 from the pipes, completing the hoisting and transfer of the entire stack of pipes.

[0037] Example 2: Based on Example 1, referring to... Figure 1 and Figure 9 As shown, it also includes a clamping plate 202; two clamping plates 202 are rotatably connected to the left and right sides of the crossbeam 2, and the clamping plates 202 are distributed in a figure-eight pattern.

[0038] It also includes an elastic gasket 203; an elastic gasket 203 is fixedly connected between each pair of corresponding plates 202, and the elastic gasket 203 is C-shaped.

[0039] Based on the above embodiment 1, considering that during the hoisting and movement process, the entire pile of pipes may sway under the influence of external wind, which could easily cause displacement of the upper pipes and affect the stable hoisting of the entire pile of pipes; therefore, after the hoisting rope 3 is tightened and the entire pile of pipes is lifted off the ground, the electric rewinder 201 is then controlled to rewind the hoisting rope 3, pulling the entire pile of pipes towards the crossbeam 2. When the uppermost pipe contacts the elastic pad 203 on the lower side of the crossbeam 2, as the entire pile of pipes continues to be pulled upwards, the elastic pad 203 deforms and adheres to the uppermost pipe, pulling the two pipes in a figure-eight pattern. The clamping plates 202 rotate in opposite directions, pressing and fixing both sides of the pipe until the two clamping plates 202 are pressed tightly against the pipe surface. The clamping plates 202 contact and press with the pipe through the elastic gaskets 203. During the subsequent hoisting process, by tightening the hoisting ropes 3, the crossbeam 2 applies downward pressure to the upper side of the entire pile of pipes. In conjunction with the slide frame 4, the bottom layer of pipes is supported and fixed, and the entire pile of pipes is fixed and limited. The clamping plates 202, which are arranged in a figure-eight pattern, restrict both sides of the entire pile of pipes. With the fixation of the limiting plate 115, the whole structure forms a triangular shape to limit the entire pile of pipes, thereby reducing the phenomenon of pipe displacement and improving the overall stability.

[0040] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention are existing technologies known to those skilled in the art.

Claims

1. A lifting device for pipeline operations, comprising a lifting frame (1), a crossbeam (2), a lifting rope (3), and an electric retractor (201); the lifting frame (1) is fixedly connected to the crossbeam (2); two electric retractors (201) are installed on the left and right sides of the crossbeam (2); each electric retractor (201) winds up a lifting rope (3); characterized in that: It also includes a slide (4); two suspension ropes (3) on the same side are connected to a slide (4); two guide wheels (41) are rotatably connected to the slide (4); the slide (4) has a rope groove (42), and the guide wheel (41) is rotatably connected inside the rope groove (42); several sliding blocks (5) are slidably connected to the slide (4); the sliding blocks (5) have a rope groove (51); each sliding block (5) is equipped with an internal support clamp (6) for fixing the pipe; the slide (4) is slidably connected to Two sliding blocks (7) are provided, and all sliding blocks (5) are located between the two sliding blocks (7); each sliding block (7) is fixedly connected to a pressure plate (8) for pushing the pipe; the suspension rope (3) passes around the guide wheel (41), enters from the rope groove (42), passes around the guide wheel (41) in the rope groove (42), and then passes through several rope grooves (51) to be fixedly connected to the sliding block (7); each sliding block (7) is fixedly connected to two springs (9), and the springs (9) are fixedly connected to the slide (4).

2. The hoisting equipment for pipeline operations according to claim 1, characterized in that: The internal support clamp (6) consists of a fixed rod (60), a hinge plate one (61), a rotating rod (62), a limiting ring (63), a rotating ring (64), a hinge plate two (65), and a support plate (66); the sliding block one (5) is fixedly connected to the fixed rod (60); the fixed rod (60) is rotatably connected to four hinge plates one (61); the fixed rod (60) is rotatably connected to the rotating rod (62); the rotating rod (62) is fixedly connected to two limiting rings (63); the rotating rod (62) is rotatably connected to the rotating ring (64), and the rotating ring (64) is located between the two limiting rings (63); the rotating ring (64) is rotatably connected to four hinge plates two (65); each hinge plate one (61) and a corresponding hinge plate two (65) are rotatably connected to a support plate (66) for supporting and fixing the pipe.

3. The hoisting equipment for pipeline operations according to claim 1, characterized in that: It also includes a push plate (101), a plug plate (102) and a plug rod (103); the sliding block (5) has two pairs of plug slots (52); each pair of plug slots (52) is slidably connected to a plug plate (102), and the plug plate (102) has several plug holes; each plug plate (102) is fixedly connected to a push plate (101), and the push plate (101) has a groove corresponding to the position of the rope groove (51); the sliding block (5) has a plug hole, and the plug rod (103) is inserted into the plug hole.

4. The hoisting equipment for pipeline operations according to claim 1, characterized in that: It also includes a rack (111), a gear (112), a gear ring (113), a mounting rod (114), and a limiting plate (115); the mounting rod (114) is rotatably connected to the sliding block (7) and the pressing plate (8); the rack (111) is fixedly connected to the slide (4); the gear ring (113) is fixedly connected to the mounting rod (114); the gear (112) is rotatably connected to the sliding block (7), and the gear (112) meshes with the gear ring (113), and the gear (112) meshes with the rack (111); the limiting plate (115) for limiting both sides of the pipe is fixedly connected to the mounting rod (114).

5. A hoisting device for pipeline operations according to claim 4, characterized in that: It also includes a movable block (116) and a pressing block (117); a groove (11501) is opened on the limiting plate (115); several movable blocks (116) are slidably connected at the groove (11501); each movable block (116) is fixedly connected to a pressing block (117), and the pressing block (117) is made of rubber.

6. The hoisting equipment for pipeline operations according to claim 1, characterized in that: It also includes elastic telescopic rods (121) and rollers (122); several elastic telescopic rods (121) are fixedly connected to the lower side of the carriage (4); each elastic telescopic rod (121) has a roller (122) rotatably connected to its telescopic part.

7. A hoisting device for pipeline operations according to claim 1, characterized in that: Both pressing plates (8) have curved surfaces on their opposite sides.

8. A hoisting device for pipeline operations according to claim 5, characterized in that: Two rubber strips (11502) are provided on one side of the limiting plate (115) with a sliding groove (11501), and the moving block (116) is located between the two rubber strips (11502).

9. A hoisting device for pipeline operations according to claim 1, characterized in that: It also includes a card plate (202); the left and right sides of the crossbeam (2) are each connected to two card plates (202), and the card plates (202) are arranged in a figure-eight pattern.

10. A hoisting device for pipeline operations according to claim 9, characterized in that: It also includes an elastic gasket (203); an elastic gasket (203) is fixed between each pair of corresponding plates (202), and the elastic gasket (203) is C-shaped.

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