Pipeline hoisting device and hoisting method

Abstract

The invention relates to a pipeline hoisting device and method, and belongs to the field of pipeline installation engineering.The pipeline hoisting device comprises a hoisting frame, a plurality of hoisting ropes, a clamping mechanism, a winding mechanism and a connecting mechanism, the hoisting ropes are arranged on the hoisting frame, and the clamping mechanism is arranged on the hoisting ropes and used for clamping a pipeline; the winding mechanism is arranged on the hanging bracket and used for winding or unwinding the hanging rope, and the connecting mechanism is arranged on the hanging bracket and used for being connected with a hook of hoisting equipment. The pipeline hoisting device has the effects that the inclination of the pipeline is adjusted by adjusting the heights of the clamping mechanisms on different hoisting ropes, the pipeline is adjusted to be horizontal, then the pipeline is hoisted, the safety in the pipeline hoisting process is improved, and the problems that in the pipeline hoisting process, the safety is poor, and horizontal placement is difficult are solved.

Description

Technical Field

[0001] The present application relates to the field of pipeline installation engineering, and in particular to a pipeline hoisting device and a pipeline hoisting method. Background Art

[0002] When carrying out factory construction or renovation, industrial pipeline installation project is one of the major items, involving the installation of compressed air pipelines, tap water pipelines, air-conditioning hot and cold water pipelines, process chilled water pipelines, soft water pipelines, pure water pipelines, oil pipelines, wastewater pipelines, nitrogen pipelines, helium pipelines and other pipelines. Some of these pipelines have a large diameter and are heavy, and need to be hoisted to high altitudes in the factory, so the hoisting construction requirements for the pipelines are high.

[0003] At present, the steel rope is usually put on the pipeline, and then the steel rope is hung on the hook of the lifting equipment to lift the pipeline. In order to maintain the balance of the pipeline during lifting, two sets of steel ropes are usually put on both sides of the pipeline respectively. However, the positions of the sets are usually determined by the staff based on experience. After lifting, since the positions of the two sets of steel ropes are not symmetrically distributed from the center of the pipeline to both sides, the pipeline is very likely to tilt during the lifting process, which affects the safety of the lifting process and adds construction difficulty to the horizontal placement of the pipeline after the subsequent lifting to the installation position. There are problems such as poor safety of existing pipeline lifting and difficulty in horizontal placement. Summary of the invention

[0004] In order to improve the problems of poor safety and difficulty in horizontal placement during pipeline hoisting, the present application provides a pipeline hoisting device and a hoisting method.

[0005] The present application provides a pipeline lifting device that adopts the following technical solution: A pipeline hoisting device comprises a hanger, a hoisting rope, a clamping mechanism, a winding mechanism and a connecting mechanism, wherein a plurality of the hoisting ropes are arranged on the hanger, the clamping mechanism is arranged on the hoisting rope and is used to clamp the pipeline, the winding mechanism is arranged on the hanger and is used to wind up or release the hoisting rope, and the connecting mechanism is arranged on the hanger and is used to connect to a hook of a lifting device.

[0006] By adopting the above technical solution, the staff connects the hanger with the hook of the lifting equipment through the connecting mechanism, then lifts the hanger to the pipe to be lifted, clamps the pipe through the clamping mechanism, and then lifts the hanger. After lifting, the horizontal state of the pipe is observed. If the pipe is tilted, the lifting rope on the tilted side is reeled or released through the reeling mechanism, and then the inclination of the pipe is adjusted by adjusting the height of the clamping mechanisms on different lifting ropes. The pipe is adjusted to a level and then lifted, thereby improving the safety of the pipe during lifting and improving the problem of poor safety and difficulty in horizontal placement during pipe lifting.

[0007] Optionally, the winding mechanism includes a winding drum, a driving motor and a reduction gear set, the winding drum is rotatably arranged on a hanger, the suspension rope is wound around the winding drum, the driving motor is arranged on the hanger, and the reduction gear set is arranged on the hanger and is used to drive the winding drum to rotate when the driving motor rotates.

[0008] By adopting the above technical solution, the staff starts the driving motor, and the driving motor drives the winding drum to rotate through the reduction gear set, so that the suspension rope wound on the winding drum can be conveniently wound up or released.

[0009] Optionally, a limiting mechanism for limiting the rotation direction of the winding disk is provided on the winding disk, and the limiting mechanism includes a ratchet, a pawl, a limiting spring and a toggle assembly. Two ratchets are coaxially arranged on the winding disk, and the two ratchets are in opposite directions. Two pawls are hingedly arranged on the hanger, and the two pawls respectively abut against two ratchets. The limiting spring is arranged on the hanger and is used to drive the pawl to abut against the ratchet. The toggle assembly is arranged on the hanger, and the toggle assembly is used to drive one of the pawls away from the ratchet.

[0010] By adopting the above technical solution, when lifting the pipeline normally, the limit spring drives the pawl to contact the ratchet, and the two pawls respectively hold the two ratchets in opposite directions, limiting the forward and reverse rotation of the reel, thereby improving the stability of the lifting rope on the reel, and then improving the stability of the rope lifting clamping mechanism and the pipeline, ensuring the safety during the pipeline lifting process, and when the inclination of the pipeline needs to be adjusted, the toggle assembly drives one of the pawls away from the ratchet, which can drive the reel to rotate in one direction. During the rotation, the other ratchet and pawl limit the reverse rotation of the reel, thereby improving the stability of the reel when winding or releasing the lifting rope.

[0011] Optionally, the toggle assembly includes a toggle motor and a protrusion, wherein the toggle motor is arranged on a hanger, and the protrusion is coaxially arranged on an output shaft of the toggle motor, and the protrusion is used to push one of the pawls away from the ratchet wheel.

[0012] By adopting the above technical solution, the toggle motor is started, and the output shaft of the toggle motor drives the protruding end of the protrusion to abut against one of the pawls, so that the pawl can be pushed away from the ratchet. The output shaft of the toggle motor drives the protruding end of the protrusion to rotate between the two pawls, so that the protrusion no longer abuts against the pawl, and the two pawls can abut against the two ratchet wheels respectively.

[0013] Optionally, the clamping mechanism includes a clamping seat, an arc-shaped plate and a driving member, the clamping seat is arranged on the suspension rope, two arc-shaped plates are slidably arranged on the clamping seat, and the driving member is arranged on the clamping seat and is used to drive the two arc-shaped plates to move closer to or away from each other.

[0014] By adopting the above technical solution, the lifting rope drives the clamping seat to move to the top of the pipeline, so that the two arc plates are respectively located on both sides of the pipeline, and then the two arc plates are driven to approach each other by the driving member. The two arc plates can be clamped on both sides of the pipeline, which is convenient for the staff to fix the pipeline to be hoisted.

[0015] Optionally, the driving member includes a bidirectional screw rod, which is rotatably arranged on the clamping seat, and the bidirectional screw rod is threadedly connected to the two arc-shaped plates, and the thread directions of the bidirectional screw rod connecting the two clamping plates are opposite.

[0016] By adopting the above technical solution, the staff can drive the two arc plates to move closer to or away from each other by rotating the bidirectional screw rod in the forward or reverse direction, thereby conveniently clamping or releasing the pipeline.

[0017] Optionally, four suspension ropes are arranged on the hanger in a rectangular array, and two adjacent suspension ropes are symmetrically distributed on the clamping seat with respect to the center of the clamping seat.

[0018] By adopting the above technical solution, when lifting the pipeline, four lifting ropes in a rectangular array disperse the gravity of the pipeline to the hanger, and two adjacent lifting ropes are symmetrically distributed on the clamping seat with the center of the clamping seat, thereby improving the stability of the clamping seat and jointly improving the stability of the pipeline during lifting.

[0019] Optionally, a spirit level is provided on the clamping seat, and a control panel is provided on the hanger, and the control panel is electrically connected to the spirit level, the driving motor and the toggle motor.

[0020] By adopting the above technical solution, the spirit level monitors the horizontality of the clamping seat in real time during the lifting process, and then controls the drive motor and the toggle motor through the control panel to adjust the horizontality of the pipeline, so as to continuously maintain the level of the pipeline during the lifting process.

[0021] Optionally, the clamping seat is provided with a positioning mechanism for positioning the clamping seat on the pipe, the positioning mechanism includes a connecting rod, a hook plate, a positioning seat and a positioning rope, the connecting rod is threadedly arranged on the clamping seat, the hook plate is rotatably arranged on the connecting rod and is used to hook from the opening of the pipe to the side wall of the pipe, the positioning seat is arranged on the clamping seat, and the positioning rope is wound around the positioning seats of the two clamping seats.

[0022] By adopting the above technical solution, after the arc plate is clamped on the pipe, the staff rotates the connecting rod so that the connecting rod drives the hook plate to move to the open side of the pipe, and then rotates the hook plate toward the center of the pipe, and then rotates the connecting rod to drive the hook plate from the opening of the pipe to the side wall of the pipe, which can limit the movement of the clamping seat in the direction close to the adjacent clamping seat, and then the staff tightens the positioning rope around the positioning seats on the two clamping seats, which can limit the movement of the clamping seat in the direction away from the adjacent clamping seat, thereby positioning the clamping seat on the pipe, thereby improving the stability of the clamping seat on the pipe.

[0023] The present application provides a pipeline hoisting method using the following technical solution: A pipeline hoisting method comprises the following steps: S1: Connect the hanger to the hook of the lifting equipment through the connecting mechanism, clamp the two clamping mechanisms to the two ends of the pipeline respectively, and position the clamping seat on the pipeline through the positioning mechanism; S2: The lifting equipment lifts the hanger, conducts a trial lift on the pipeline, checks whether all parts are firmly connected, and then lowers the pipeline; S3: The lifting equipment lifts the hanger again, and the level meter detects the levelness of the clamping seat, and then the levelness of the pipeline. If the levelness deviation exceeds the design range, the control panel controls the winding mechanism to wind up or release the lifting rope to adjust the pipeline to a level; S4: Lift the pipeline to the set position and release the clamping mechanism from clamping the pipeline.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. By adjusting the height of the clamping mechanism on different lifting ropes, the inclination of the pipeline can be adjusted, the pipeline can be adjusted to a level, and then the pipeline can be hoisted, thereby improving the safety of the pipeline hoisting process and resolving the problem of poor safety and difficulty in horizontal placement during the pipeline hoisting process; 2. The two pawls respectively hold the two ratchets in opposite directions, limiting the forward and reverse rotation of the reel, improving the stability of the lifting rope on the reel, and then improving the stability of the lifting rope clamping mechanism and the pipeline, ensuring the safety during the pipeline lifting process; 3. Position the clamping seat on the pipe to improve the stability of the clamping seat on the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the pipeline lifting device according to an embodiment of the present application.

[0026] Figure 2 It is a schematic diagram of the structure of the clamping mechanism of an embodiment of the present application.

[0027] Figure 3It is a structural schematic diagram of the winding mechanism of an embodiment of the present application.

[0028] Figure 4 It is a structural schematic diagram of the limiting mechanism of an embodiment of the present application.

[0029] Figure 5 It is a structural schematic diagram of the limiting mechanism of the embodiment of the present application from another perspective.

[0030] Figure numerals: 1. hanger; 2. hanging rope; 3. clamping mechanism; 31. clamping seat; 32. arc plate; 33. driving member; 331. bidirectional screw rod; 4. winding mechanism; 41. winding disk; 42. driving motor; 43. reduction gear set; 5. connecting mechanism; 6. limiting mechanism; 61. ratchet; 62. pawl; 63. limiting spring; 64. toggle assembly; 641. toggle motor; 642. bump; 7. level; 8. control panel; 9. positioning mechanism; 91. connecting rod; 92. hook plate; 93. positioning seat; 94. positioning rope. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-5 This application is described in further detail.

[0032] The embodiments of the present application disclose a pipeline hoisting device and a pipeline hoisting method.

[0033] Reference Figure 1 The pipeline lifting device includes a hanger 1, a lifting rope 2, a clamping mechanism 3, a winding mechanism 4 and a connecting mechanism 5. The connecting mechanism 5 is installed on the hanger 1. The connecting mechanism 5 is used to connect with the hook of the lifting equipment. In the present embodiment, the hanger 1 is a rectangular frame formed by welding a plurality of I-beams. The hanger 1 is welded with four lifting ears in a rectangular array. The connecting mechanism 5 includes four steel ropes. The four steel ropes are respectively wound around the four lifting ears. Each steel rope is locked and fixed on the lifting ears by a rope clamp. The ends of the four steel ropes away from the hanger 1 are locked by the rope clamp to form a rope loop for the hook of the lifting equipment to be hooked. The staff controls the hook of the lifting equipment to be hooked to the rope loop formed by the four steel ropes, and the hanger 1 can be lifted by the lifting equipment. During the lifting process, the steel ropes distributed in the four rectangular arrays evenly distribute the force, thereby improving the stability of the hanger 1 during the lifting process.

[0034] Reference Figure 1 , Figure 2Four suspension ropes 2 are installed in a rectangular array on the side of the hanger 1 away from the connecting mechanism 5. In this embodiment, the suspension rope 2 is a steel wire rope; the clamping mechanism 3 is installed on the suspension rope 2, and the clamping mechanism 3 is used to clamp the pipeline. The clamping mechanism 3 includes a clamping seat 31, an arc plate 32 and a driving member 33. One clamping seat 31 is installed on each of the two suspension ropes 2 in two adjacent and parallel groups of four suspension ropes 2, so that the two clamping seats 31 are also parallel to each other. The two suspension ropes 2 on the same clamping seat 31 are symmetrically distributed with the center of the clamping seat 31. A slide groove is provided on the clamping seat 31, and two arc plates 32 are slidably installed in the slide groove. The two arc plates 32 are symmetrically distributed so that an arc space for the pipe to be inserted is formed between the two arc plates 32. In the present embodiment, a rubber pad is installed on the side of the arc plate 32 facing the adjacent arc plate 32 to enhance the friction between the arc plate 32 and the pipe and reduce the damage to the pipe when the arc plate 32 clamps the pipe. The driving member 33 is installed on the clamping seat 31. The driving member 33 is used to drive the two arc plates 32 to move closer to or away from each other. The driving member 33 includes a bidirectional screw rod 331, which is rotatably installed on the clamping seat 31. The directions of the two sections of threads connected to the two clamping seats 31 are opposite.

[0035] The staff lifts the hanger 1 to the top of the pipeline through the lifting equipment, so that the two clamping seats 31 are symmetrically distributed to the two ends of the pipeline with the center of the pipeline, and the two arc plates 32 on the same clamping seat 31 are respectively located on both sides of the pipeline, and then the staff twists the bidirectional screw rod 331 to make the two arc plates 32 approach each other to clamp the pipeline, and then the hanger 1 can be lifted again by the lifting equipment, and the hanger 1 can lift the pipeline through the lifting rope 2 for hoisting. The rectangular array distribution of the four lifting ropes 2 on the hanger 1 and the symmetrical distribution of the two adjacent lifting ropes 2 on the clamping seat 31 make the gravity of the pipeline evenly and stably transmitted to the hanger 1, thereby improving the stability of the pipeline during hoisting and reducing the probability of the pipeline tilting during hoisting. The staff can make the two arc plates 32 clamp or release the pipeline by rotating the bidirectional screw rod 331, which is convenient for the staff to fix or release the pipeline.

[0036] Reference Figure 2 A positioning mechanism 9 is installed on the clamping seat 31, and the positioning mechanism 9 is used to position the clamping seat 31 on the pipe. The positioning mechanism 9 includes a connecting rod 91, a hook plate 92, a positioning seat 93 and a positioning rope 94. The connecting rod 91 is threadedly installed on one clamping seat 31, and the moving directions of the two connecting rods 91 are opposite. The hook plate 92 is rotatably installed on one end of the connecting rod 91 away from the other connecting rod 91. One positioning seat 93 is installed on one clamping seat 31, and the positioning rope 94 is wound around the two positioning seats 93. In this embodiment, the positioning rope 94 is a steel rope.

[0037] After the staff clamps the arc plate 32 on the clamping seat 31 onto the pipe, they rotate the connecting rod 91 so that the connecting rod 91 drives the hook plate 92 to move toward the end of the pipe, and then rotate the hook plate 92 so that the hook plate 92 faces the end opening of the pipe, and then rotate the connecting rod 91 in the opposite direction so that the hook plate 92 is hooked onto the inner wall of the opening of the pipe, thereby limiting the movement of the clamping seat 31 in the direction away from the end of the pipe. Then the staff winds the positioning rope 94 tightly around the two positioning seats 93, and the positioning rope 94 can tighten the two positioning seats 93, and then tighten the two clamping seats 31, limiting the movement of the clamping seat 31 in the direction close to the end of the pipe, and then positioning the clamping seat 31 on the pipe, thereby improving the stability of the clamping seat 31 on the pipe, and further improving the stability during the process of lifting the pipe.

[0038] Reference Figure 1 , Figure 3 The winding mechanism 4 is installed on the hanger 1, and the winding mechanism 4 is used to wind up or release the suspension rope 2. The winding mechanism 4 includes a winding disk 41, a driving motor 42 and a reduction gear set 43. Four winding disks 41 are rotatably installed in a rectangular array on the hanger 1. The four suspension ropes 2 are respectively wound on the four winding disks 41. The driving motor 42 is installed on the hanger 1, and the reduction gear set 43 is installed on the hanger 1. The reduction gear set 43 is used to drive the winding disk 41 to rotate when the output shaft of the driving motor 42 rotates.

[0039] After the pipeline is lifted, if the pipeline is tilted, start the drive motor 42, and the drive motor 42 drives the winding disk 41 to rotate through the reduction gear set 43, and the lifting rope 2 is wound or released, so that the height of the two clamping seats 31 can be adjusted, and the pipeline can be adjusted to be level, thereby improving the safety during the pipeline lifting process.

[0040] Reference Figure 4 , Figure 5A limiting mechanism 6 is installed on the winding disk 41. The limiting mechanism 6 is used to limit the rotation direction of the winding disk 41. The limiting mechanism 6 includes a ratchet 61, a pawl 62, a limiting spring 63 and a toggle assembly 64. Two ratchet wheels 61 are coaxially installed on the winding disk 41. The directions of the two ratchet wheels 61 are opposite. Two pawls 62 are hingedly installed on the hanger 1. The two pawls 62 are respectively used to abut against the two ratchet wheels 61. Two limiting springs 63 are installed on the hanger 1. The two limiting springs 63 are respectively connected to the two pawls 62. Then, the limit spring 63 always has the tendency to drive the pawl 62 to abut against the ratchet 61. The toggle assembly 64 is installed on the hanger 1. The toggle assembly 64 is used to drive one of the pawls 62 away from the ratchet 61. The toggle assembly 64 includes a toggle motor 641 and a protrusion 642. The toggle motor 641 is installed on the hanger 1. The protrusion 642 is coaxially installed on the output shaft of the toggle motor 641. The protrusion 642 is located between the two pawls 62. The protruding end of the protrusion 642 is used to push one of the pawls 62 away from the ratchet 61.

[0041] When the pipeline is hoisted normally, the motor 641 is driven to drive the protruding end of the protrusion 642 to rotate between the two ratchet claws 62, and the limit spring 63 drives the ratchet claw 62 to abut against the ratchet wheel 61. The two ratchet claws 62 lock the two opposite ratchet wheels 61, which can lock the rotation of the winding drum 41, thereby improving the stability of the length of the lifting rope 2 released from the winding drum 41 during the process of hoisting the pipeline, thereby improving the stability of the pipeline during the hoisting process and ensuring the safety of the pipeline during the hoisting process; when the pipeline inclination needs to be adjusted, the motor is driven to drive the motor ... The protruding end of the protrusion 641 drives the protruding end of the protrusion 642 to rotate until one of the pawls 62 is pushed away from the ratchet 61. At this time, the winding drum 41 can be rotated toward the locking direction of the ratchet 61 to reel in or release the sling 2. In the process of reeling in or releasing the sling 2, the other pawl 62 is still abutted against the other ratchet 61 under the action of the limit spring 63, limiting the winding drum 41 from rotating in the opposite direction during the rotation process, thereby improving the stability of the winding drum 41 during the process of reeling in or releasing the sling 2.

[0042] Reference Figure 1 , Figure 2 A level 7 is installed on the clamping seat 31. In the present embodiment, the level 7 is an electronic level 7. A control panel 8 is installed on the hanger 1. The control panel 8 is electrically connected to the level 7, the driving motor 42 and the toggle motor 641.

[0043] During the lifting process, the spirit level 7 monitors the levelness of the clamping seat 31, and then monitors the levelness of the pipeline. The spirit level 7 then sends an electrical signal to the control panel 8. If the monitored levelness exceeds the set levelness deviation, the control panel 8 can control the toggle motor 641 and the drive motor 42 to start, reel in or release the lifting rope 2, and then adjust the levelness of the pipeline in time, so that the levelness of the pipeline can be continuously monitored and adjusted during the lifting process to ensure safety.

[0044] A pipeline hoisting method comprises the following steps: S1: Connect the hanger 1 to the hook of the lifting equipment through the connecting mechanism 5, clamp the two clamping mechanisms 3 to the two ends of the pipeline respectively, and position the clamping seat 31 on the pipeline through the positioning mechanism 9; S2: The lifting equipment lifts the hanger 1, performs a trial lift on the pipeline, checks whether all parts are firmly connected, and then lowers the pipeline; S3: The lifting device lifts the hanger 1 again, and the level meter 7 detects the levelness of the clamping seat 31, and then detects the levelness of the pipeline. If the levelness deviation exceeds the design range, the control panel 8 controls the winding mechanism 4 to wind or release the lifting rope 2 to adjust the pipeline to a level; S4: hoist the pipeline to the set position and release the clamping mechanism 3 from clamping the pipeline.

[0045] The implementation principle of a pipeline hoisting device and a hoisting method in the embodiment of the present application is as follows: the staff connects the hook of the hoisting equipment with the hanger 1 through the connecting mechanism 5, and then hoists the hanger 1 to the top of the pipeline to be hoisted, so that the two arc plates 32 on the clamping seat 31 are respectively located on both sides of the pipeline, and then rotates the bidirectional screw rod 331 to make the two arc plates 32 approach each other to clamp the pipeline, and hooks the hook plate 92 to the inner wall of the opening side of the pipeline, and at the same time, tightens the positioning rope 94 to the positioning seat 93 on the two clamping seats 31, positions the two clamping seats 31, and then the hoisting equipment lifts the hanger 1, and conducts a trial hoist on the pipeline to check whether the connections at each position are firm, and then lowers the pipeline and aligns the pipe. After stabilizing the loose connection, lift the hanger 1 again. After the pipeline is lifted, the spirit level 7 monitors the horizontality of the clamping seat 31, and then monitors the horizontality of the pipeline. If the inclination of the pipeline exceeds the set range, the control panel 8 controls the toggle motor 641 and the drive motor 42 to start, and the lifting rope 2 connecting the two clamping seats 31 is wound or released, and the height of the two clamping seats 31 is adjusted to adjust the pipeline to the level. After the pipeline is lifted to the installation position, the arc plate 32 is released to clamp the pipeline, and the pipeline can be placed horizontally at the installation position, thereby improving the safety of the pipeline during lifting and improving the problem of poor safety and difficulty in horizontal placement during the pipeline lifting process.

[0046] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pipeline hoisting device, characterized in that: The invention comprises a hanger (1), a lifting rope (2), a clamping mechanism (3), a reeling mechanism (4) and a connecting mechanism (5), wherein a plurality of the lifting ropes (2) are arranged on the hanger (1), the clamping mechanism (3) is arranged on the lifting rope (2) and is used to clamp the pipeline, the reeling mechanism (4) is arranged on the hanger (1) and is used to reel in or release the lifting rope (2), and the connecting mechanism (5) is arranged on the hanger (1) and is used to connect to a hook of a lifting device.

2. A pipeline hoisting device according to claim 1, characterized in that: The winding mechanism (4) comprises a winding disk (41), a driving motor (42) and a reduction gear set (43); the winding disk (41) is rotatably arranged on the hanging frame (1); the hanging rope (2) is wound around the winding disk (41); the driving motor (42) is arranged on the hanging frame (1); and the reduction gear set (43) is arranged on the hanging frame (1) and is used to drive the winding disk (41) to rotate when the driving motor (42) rotates.

3. A pipeline hoisting device according to claim 2, characterized in that: The winding disk (41) is provided with a limiting mechanism (6) for limiting the rotation direction of the winding disk (41), the limiting mechanism (6) comprising a ratchet (61), a pawl (62), a limiting spring (63) and a toggle assembly (64), two ratchet wheels (61) are coaxially provided on the winding disk (41), the two ratchet wheels (61) are in opposite directions, two pawls (62) are hingedly provided on the hanger (1), the two pawls (62) respectively abut against the two ratchet wheels (61), the limiting spring (63) is provided on the hanger (1) and is used to drive the pawl (62) to abut against the ratchet wheel (61), and the toggle assembly (64) is provided on the hanger (1), and the toggle assembly (64) is used to drive one of the pawls (62) away from the ratchet wheel (61).

4. A pipeline hoisting device according to claim 3, characterized in that: The toggle assembly (64) comprises a toggle motor (641) and a bump (642); the toggle motor (641) is arranged on the hanger (1); the bump (642) is coaxially arranged on the output shaft of the toggle motor (641); the bump (642) is used to push one of the pawls (62) away from the ratchet wheel (61).

5. A pipeline hoisting device according to claim 1, characterized in that: The clamping mechanism (3) comprises a clamping seat (31), an arc-shaped plate (32) and a driving member (33); the clamping seat (31) is arranged on the suspension rope (2); two arc-shaped plates (32) are slidably arranged on the clamping seat (31); and the driving member (33) is arranged on the clamping seat (31) and is used to drive the two arc-shaped plates (32) to move closer to or farther from each other.

6. A pipeline hoisting device according to claim 5, characterized in that: The driving member (33) comprises a bidirectional screw rod (331), the bidirectional screw rod (331) being rotatably disposed on the clamping seat (31), the bidirectional screw rod (331) being threadedly connected to the two arc-shaped plates (32), and the thread directions of the bidirectional screw rod (331) and the two clamping plates being opposite.

7. A pipeline hoisting device according to claim 5, characterized in that: Four of the suspension ropes (2) are arranged on the hanger (1) in a rectangular array, and two adjacent suspension ropes (2) are symmetrically distributed on the clamping seat (31) about the center of the clamping seat (31).

8. A pipeline hoisting device according to claim 5, characterized in that: The clamping seat (31) is provided with a level meter (7), and the hanger (1) is provided with a control panel (8), wherein the control panel (8) is electrically connected to the level meter (7), the driving motor (42), and the toggle motor (641).

9. A pipeline hoisting device according to claim 5, characterized in that: The clamping seat (31) is provided with a positioning mechanism (9) for positioning the clamping seat (31) on the pipeline. The positioning mechanism (9) comprises a connecting rod (91), a hook plate (92), a positioning seat (93) and a positioning rope (94). The connecting rod (91) is threadedly arranged on the clamping seat (31). The hook plate (92) is rotatably arranged on the connecting rod (91) and is used to be hooked from the opening of the pipeline to the side wall of the pipeline. The positioning seat (93) is arranged on the clamping seat (31). The positioning rope (94) is wound around the positioning seats (93) of the two clamping seats (31).

10. A pipeline hoisting method applied to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: Connect the hanger (1) to the hook of the lifting device through the connecting mechanism (5), clamp the two clamping mechanisms (3) to the two ends of the pipeline respectively, and position the clamping seat (31) on the pipeline through the positioning mechanism (9); S2: The lifting device lifts the hanger (1), performs a trial lift on the pipeline, checks whether all parts are firmly connected, and then lowers the pipeline; S3: The lifting device lifts the hanger (1) again, and the level meter (7) detects the horizontality of the clamping seat (31), thereby detecting the horizontality of the pipeline. If the deviation of the horizontality exceeds the design range, the control panel (8) controls the reeling mechanism (4) to reel in or release the lifting rope (2), thereby adjusting the pipeline to a horizontal level; S4: The pipeline is hoisted to the set position, and the clamping mechanism (3) is released from clamping the pipeline.

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