A pipeline construction apparatus

Abstract

The present application belongs to the technical field of pipeline hoisting, and particularly relates to a pipeline construction device, which comprises a mounting plate, a winding cylinder and a folding assembly. The mounting plate is fixedly connected with mounting ears. The winding cylinder is located on one side of the mounting plate and rotationally connected with the mounting plate. A hoisting sling is wound on the winding cylinder. A pair of supporting arms are hingedly connected to the mounting plate. The mounting plate is provided with a first driving mechanism for driving the pair of supporting arms to open and close. A sling hook and a limiting shaft are arranged on one of the supporting arms. The folding assembly comprises a left driving rod and a right driving rod. A clamping assembly is arranged on the left driving rod. A pair of limiting rollers are rotationally connected to the right driving rod. The supporting arms automatically open and close to hold the pipeline, so that the hoisting sling is prevented from being inserted into the bottom of the pipeline by manual operation. The winding and unwinding of the hoisting sling, the locking and releasing of the hook are all completed by mechanical driving. Workers only need to insert the fixing shaft into the clamping assembly on the ground, and completely leave the high-risk area.

Description

Technical Field

[0001] This invention belongs to the field of pipeline hoisting technology, and specifically relates to a pipeline construction device. Background Technology

[0002] In existing municipal, water supply and drainage, and gas pipeline laying construction, a simple hoisting mode of sling + excavator is often used: first, the flexible sling is manually passed through the bottom of the pipeline, and then the two ends of the sling are hung on the hook of the excavator, and the excavator completes the lifting, moving and lowering.

[0003] Pipelines are often placed in pits or on wooden blocks, with narrow gaps at the bottom, requiring workers to bend over to thread the slings through. If the pipeline rolls due to uneven ground or external force, it can easily crush the limbs of workers, causing injury or death.

[0004] After the sling is threaded, it is still necessary to manually hook both ends onto the excavator hook. When the pipeline is moved above the installation pit and placed in position, the sling is pressed to the bottom by the pipeline. It is necessary to manually climb into the excavated pipe pit again to pull the sling completely out from under the pipeline before the next pipeline can be hoisted, which seriously affects the continuity of construction and the safety of operations in the pit.

[0005] The aforementioned defects make the existing sling hoisting method both time-consuming and labor-intensive, and pose significant personal safety hazards. Especially with increasingly stringent requirements for personal safety, there is an urgent need for a mechanized hoisting tool that can avoid manual threading, hanging, and pulling of the sling, and reduce the number of times personnel need to enter the pit. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention provides a pipeline construction device that reduces the risk of personal injury during traditional sling hoisting processes and improves operational efficiency.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0008] A pipeline construction device includes an installation plate, a winding cylinder, and a retracting assembly. The installation plate has mounting ears fixedly connected to it. The winding cylinder is located on one side of the installation plate and rotatably connected to it. The installation plate is equipped with a reduction motor for driving the winding cylinder to rotate. A lifting sling is wound around the winding cylinder. A pair of support arms are hinged to the installation plate, and the installation plate is equipped with a first drive mechanism for driving the opening and closing of the pair of support arms. One of the support arms has a sling hook and a limiting shaft, which limits the downward position of the lifting sling.

[0009] The folding assembly includes a left drive rod and a right drive rod, both of which are slidably connected to the mounting plate. The left drive rod is equipped with a clamping assembly, and the right drive rod is rotatably connected to a pair of limiting rollers. One end of the sling hook passes between the pair of limiting rollers and is fixedly connected to a connecting shaft. The connecting shaft engages with the sling hook. The connecting shaft is fixedly connected to a fixed shaft via a connecting strap, and the clamping assembly clamps the fixed shaft. The mounting plate is equipped with a second drive mechanism that drives the left and right drive rods to move in opposite directions or towards each other. When the left and right drive rods move towards each other, the clamping assembly is locked.

[0010] The clamping assembly includes a fixed roller and a movable roller. The fixed roller is rotatably connected to the left drive rod, and the movable roller is slidably connected to the left drive rod. The left drive rod is provided with a spring assembly that pushes the movable roller to move.

[0011] The spring assembly includes a push rod, a spring, and a limiting plate; the push rod is slidably connected to the left drive rod; the spring is sleeved outside the push rod and its two ends abut against the push rod and the left drive rod respectively; one end of the push rod contacts the outer surface of the movable roller; the limiting plate is fixedly connected to the mounting plate; when the other end of the push rod abuts against the limiting plate, it can restrict the movement of the push rod, so that the clamping assembly is in a locked state.

[0012] The sling hook is slidably connected to the support arm, and a compression spring is provided between the sling hook and the support arm.

[0013] Several support rollers are rotatably connected to the inner surfaces of each pair of support arms.

[0014] It also includes rubber protective plates, which can be detachably connected to each support arm. The rubber protective plates have grooves for accommodating the support rollers.

[0015] The first driving mechanism includes a first driving cylinder and a movable plate; the cylinder body of the first driving cylinder is fixedly connected to the mounting plate; the piston rod of the first driving cylinder is fixedly connected to the movable plate; the support arm is connected to the movable plate through a connecting rod, and the two ends of the connecting rod are respectively hinged to the support arm and the movable plate.

[0016] The second drive mechanism includes a drive gear and a second drive cylinder; the drive gear is rotatably connected to the mounting plate, the cylinder body of the second drive cylinder is fixedly connected to the mounting plate, and the piston rod of the second drive cylinder is fixedly connected to the right drive rod; both the left and right drive rods are fixed with drive racks that mesh with the drive gear; the drive gear is located between the two drive racks.

[0017] It also includes a limiting ring, which is sleeved on the piston rod of the first drive cylinder. A sliding rod is fixedly connected to the limiting ring and is slidably connected to the moving plate. A limiting spring is sleeved on the sliding rod, and the two ends of the limiting spring abut against the limiting ring and the moving plate, respectively. An adjusting ring is threaded to the lower end of the sliding rod. Limiting protrusions are fixed on both the limiting ring and the drive gear.

[0018] The left and right drive rods are slidably connected; a protective roller is rotatably connected to one side of the mounting plate.

[0019] Compared with the prior art, the beneficial effects of this invention are:

[0020] The support arm automatically opens and closes to support the pipe, avoiding the need for manual lifting of the hoisting sling at the bottom of the unrestrained pipe; the hoisting sling retraction, hook locking / releasing are all mechanically driven, and workers only need to insert the fixed shaft into the clamping assembly on the ground to completely leave the high-risk area.

[0021] The winding drum, in conjunction with a geared motor, enables automatic deployment and retraction of the lifting slings, eliminating the need for manual pulling. The retraction assembly drives the lifting slings to quickly converge, increasing the wrap angle and shortening adjustment time. After lifting is completed, the lifting slings automatically engage with the hook via the limit shaft, preparing for the next lifting operation.

[0022] The entire lifting process is supported by flexible lifting slings, avoiding damage to the outer wall of the pipe from rigid clamping; the support arm has built-in rolling support rollers to reduce friction when lifting the pipe. Optional rubber protective plates are available to adapt to uncoated pipes, expanding application scenarios.

[0023] The clamping assembly features a double safety mechanism of spring locking and limit protrusions to prevent accidental loosening during lifting; the geared motor has a built-in braking mechanism to ensure the stability of the lifting sling during suspension. Protective rollers prevent friction between the lifting sling and the mounting plate, extending its service life.

[0024] In summary, this device replaces high-risk manual processes with mechanized operations, significantly reducing the construction accident rate while improving hoisting accuracy and efficiency. It is especially suitable for safe construction in deep pits, confined spaces, and large-diameter pipelines. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 This is the front view of the present invention;

[0027] Figure 3 This is a cross-sectional view of the present invention;

[0028] Figure 4This is a schematic diagram of the hoisting process of the present invention, wherein (a) is a schematic diagram of the support arm in the closed state; (b) is a schematic diagram of the connection state between the fixed shaft and the clamping assembly; and (c) is a schematic diagram of the pipe being hoisted.

[0029] Figure 5 This is a bottom view of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the retractable component of the present invention;

[0031] Figure 7 This is a schematic diagram of the connection structure between the limiting ring and the drive gear of the present invention;

[0032] Figure 8 yes Figure 7 The front view of the structure shown;

[0033] Figure 9 This is a schematic diagram of the structure of the rubber protective plate of the present invention;

[0034] Wherein: 1 is the mounting plate, 2 is the winding cylinder, 3 is the gathering assembly, 30 is the left drive rod, 31 is the right drive rod, 32 is the second drive mechanism, 320 is the drive gear, 321 is the second drive cylinder, 322 is the drive rack, 33 is the clamping assembly, 330 is the fixed roller, 331 is the movable roller, 34 is the limiting roller, 35 is the connecting shaft, 350 is the connecting belt, 36 is the fixed shaft, 37 is the spring assembly, 370 is the push rod, 371 is the spring, and 372 is the limiting roller. 4 is a mounting ear, 5 is a geared motor, 6 is a lifting sling, 7 is a support arm, 70 is a limiting shaft, 8 is a first drive mechanism, 80 is a first drive cylinder, 81 is a moving plate, 82 is a connecting rod, 9 is a sling hook, 90 is a clamping spring, 10 is a support roller, 11 is a rubber protective plate, 12 is a limiting ring, 13 is a sliding rod, 14 is a limiting spring, 15 is an adjusting ring, 16 is a limiting protrusion, 17 is a sliding rod, 18 is a sliding groove, 19 is a protective roller, and 20 is a pipe. Detailed Implementation

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0036] like Figures 1 to 5 As shown, a pipeline construction device includes an installation plate 1, a winding cylinder 2, and a gathering assembly 3. The installation plate 1 is fixedly connected with an installation ear 4, which can be connected to equipment such as an excavator.

[0037] The winding drum 2 is located on one side of the mounting plate 1 and is rotatably connected to the mounting plate 1. The mounting plate 1 is equipped with a geared motor 5 that drives the winding drum 2 to rotate. The housing of the geared motor 5 is fixedly connected to the mounting plate 1, and the output shaft of the geared motor 5 is connected to the winding drum 2 for transmission. The geared motor 5 is a motor with a brake.

[0038] A lifting sling 6 is wound around the winding drum 2, and the pipe 20 is lifted using the lifting sling 6. A pair of support arms 7 are hinged to the lower side of the mounting plate 1, and the mounting plate 1 is equipped with a first drive mechanism 8 that drives the opening and closing of the pair of support arms 7. A sling hook 9 and a limiting shaft 70 are provided on one of the support arms 7. When the support arm 7 is opened to its maximum angle, the limiting shaft 70 limits the downward position of the lifting sling 6, so that the plumb line of the lifting sling 6 is within the opening range of the sling hook 9.

[0039] The retractable assembly 3 includes a left drive rod 30 and a right drive rod 31, both of which are slidably connected to the mounting plate 1. This can be achieved by setting guide rails or other means. The mounting plate 1 is provided with a second drive mechanism 32 that drives the left drive rod 30 and the right drive rod 31 to move towards or away from each other. When the left drive rod 30 and the right drive rod 31 move towards each other, the clamping assembly 33 on the left drive rod 30 can be locked.

[0040] A clamping assembly 33 is provided on the left drive rod 30, and a pair of limiting rollers 34 are rotatably connected to the right drive rod 31. One end of the sling hook 9 passes between the pair of limiting rollers 34 and is fixedly connected to a connecting shaft 35. The connecting shaft 35 cooperates with the sling hook 9; that is, when not hoisting, the connecting shaft 35 is engaged in the sling hook 9; when hoisting, the connecting shaft 35 is separated from the sling hook 9. The connecting shaft 35 is fixedly connected to a fixed shaft 36 via a connecting strap 350. During hoisting, the fixed shaft 36 is fixed by the clamping assembly 33.

[0041] The hoisting process is as follows: The device is moved to the location 20 of the pipeline to be hoisted using an excavator; (e.g., ...) Figure 4 As shown in (a), the first drive mechanism 8 first causes a pair of support arms 7 to close and support the pipe 20; then an excavator lifts the device and the supported pipe 20. Figure 4 As shown in (b), the worker then places the fixed shaft 36 into the clamping assembly 33 (during this process, the winding drum 2 rotates to loosen the lifting sling 6, and the lifting sling 6 is in a slack state), and the clamping assembly 33 clamps the fixed shaft 36. Figure 4As shown in (c), the left drive rod 30 and the right drive rod 31 move toward each other through the second drive mechanism 32. After the movement is completed, the clamping assembly 33 is locked. At this time, the winding drum 2 rotates in the opposite direction to wind the lifting sling 6. The lifting sling 6 lifts the pipe 20 and creates a gap between the pipe 20 and the support arm 7. The excavator then moves the pipe 20 to the required installation position.

[0042] After the pipe 20 is placed in the required installation position, the lifting sling 6 is first loosened by rotating the winding drum 2, causing the pipe 20 to move down until the support arm 7 supports the pipe 20; then, the second drive mechanism 32 causes the left drive rod 30 and the right drive rod 31 to move in opposite directions. After the opposite movement ends, the clamping assembly 33 is in the installable and release state; then, the lifting sling 6 is wound by the winding drum 2. During the winding process, the lifting sling 6 will pull the fixed shaft 36 and separate the fixed shaft 36 from the clamping assembly 33 (the lifting sling 6 is not completely retracted); finally, the first drive mechanism 8 causes the pair of support arms 7 to open to the maximum angle to lower the pipe 20.

[0043] After the hoisting is completed, the entire structure is moved upward by the excavator; the winding drum 2 continues to rotate and wind the lifting sling 6. Because the limiting shaft 70 limits the lifting sling 6, the plumb line of the lifting sling 6 is located within the opening range of the sling hook 9. During the winding process, the connecting shaft 35 at the lower end of the lifting sling 6 is engaged in the opening of the sling hook 9, preparing for the next hoisting.

[0044] With the above structural design, before lifting, the support arm 7 lifts the pipe 20, making it easy to pass the lifting sling 6 around the pipe 20; moreover, the lifted pipe 20 is in a restrained state, which can prevent the pipe 20 from shifting and causing injury during the installation of the lifting sling 6. During lifting, the fixed shaft 36 can be manually placed into the clamping assembly 33 to complete the operation. During the retrieval of the lifting sling 6, it can be automatically retrieved by the winding drum 2, without the need for manual entry into the pipe pit.

[0045] The support arm 7 only supports the pipe 20 before and after lifting, rather than clamping or moving the pipe 20. During lifting, the pipe 20 is secured by the flexible lifting slings 6, thus preventing damage to the outer surface of the pipe 20. The retracting assembly 3 can bring the upper part of the lifting slings 6 closer to the center, thereby increasing the contact area (wrap angle) with the pipe 20.

[0046] Furthermore, such as Figure 5 and Figure 6As shown, the clamping assembly 33 includes a fixed roller 330 and a movable roller 331. The fixed roller 330 is rotatably connected to the left drive rod 30, and the movable roller 331 is slidably connected to the left drive rod 30. A spring assembly 37 is provided on the left drive rod 30 to push the movable roller 331 to move. The fixed shaft 36 is pushed in from the gap below the fixed roller 330 and the movable roller 331, so that the fixed shaft 36 is above the gap between the fixed roller 330 and the movable roller 331, thus completing the installation.

[0047] The spring assembly 37 includes a push rod 370, a spring 371, and a limiting plate 372; the push rod 370 is slidably connected to the left drive rod 30; the spring 371 is sleeved on the push rod 370 and its two ends abut against the push rod 370 and the left drive rod 30 respectively; one end of the push rod 370 is in contact with the outer surface of the movable roller 331.

[0048] After the left drive rod 30 and the right drive rod 31 have completed their opposite movements, the clamping device is in an installable and releaseable state. That is, the fixed shaft 36 can be engaged into or pulled out of the clamping assembly 33 by applying external force. Specifically, the engagement process is as follows: as the fixed shaft 36 is pushed into the gap between the fixed roller 330 and the movable roller 331, it pushes the movable roller 331 to move and compresses the spring 371; when the fixed shaft 36 is above the gap between the fixed roller 330 and the movable roller 331, the spring 371 releases its elastic potential energy, pushing the movable roller 331 to move in the opposite direction, cooperating with the fixed roller 330 to clamp the connecting belt 350. The pull-out process is as follows: a pulling force is applied by the lifting strap 6, causing the fixed shaft 36 to move downwards and push the movable roller 331 to move until it is pulled out.

[0049] After the left drive rod 30 and the right drive rod 31 move toward each other, the other end of the push rod 370 abuts against the limiting plate 372 fixed on the mounting plate 1, thereby restricting the movement of the push rod 370. At this time, since the push rod 370 cannot move (i.e. the movable roller 331 cannot move either), even if a pulling force is applied, the fixed shaft 36 cannot be pulled out; that is, the clamping assembly 33 is in a locked state.

[0050] Furthermore, such as Figure 1 and Figure 2 As shown, the sling hook 9 is slidably connected to the support arm 7, and a compression spring 90 is provided between the sling hook 9 and the support arm 7. When the connecting shaft 35 at the lower end of the lifting sling 6 is engaged in the opening of the sling hook 9, the compression spring 90 can play a certain buffering role to prevent the lifting sling 6 from being overstretched.

[0051] Furthermore, several support rollers 10 are rotatably connected to the inner surfaces of each pair of support arms 7; during the process of supporting the pipe 20, the support rollers 10 make rolling contact, which further protects the outer surface of the pipe 20.

[0052] Furthermore, such as Figure 9 As shown, it also includes rubber protective plates 11, which are detachably connected to each support arm 7. The rubber protective plates 11 have grooves for accommodating the support rollers 10. When hoisting pipes 20 with uncoated outer surfaces or pipes 20 made of hard materials, the rubber protective plates 11 can be installed on the support arms 7 via bolts or other means. During hoisting, the pipes 20 can be moved directly by clamping them with the support arms 7, without the need for lifting slings 6. Conversely, if lifting slings 6 are required, the rubber protective plates 11 are removed.

[0053] Furthermore, such as Figure 2 As shown, the first drive mechanism 8 includes a first drive cylinder 80 and a movable plate 81; the cylinder body of the first drive cylinder 80 is fixedly connected to the mounting plate 1; the piston rod of the first drive cylinder 80 is fixedly connected to the movable plate 81; the support arm 7 is connected to the movable plate 81 through a connecting rod 82, and the two ends of the connecting rod 82 are respectively hinged to the support arm 7 and the movable plate 81. The opening and closing of a pair of support arms 7 can be achieved by the movement of the piston rod.

[0054] Furthermore, such as Figure 5 and Figure 6 As shown, the second drive mechanism 32 includes a drive gear 320 and a second drive cylinder 321; the drive gear 320 is rotatably connected to the mounting plate 1. The drive gear 320 has a through hole in the middle, through which the piston rod of the first drive cylinder 80 can pass and be fixedly connected to the moving plate 81.

[0055] The cylinder body of the second drive cylinder 321 is fixedly connected to the mounting plate 1, and the piston rod of the second drive cylinder 321 is fixedly connected to the right drive rod 31. Both the left drive rod 30 and the right drive rod 31 are fixed with drive racks 322 that mesh with the drive gear 320. The drive gear 320 is located between the two drive racks 322. The extension and retraction of the piston rod of the second drive cylinder 321 drives the right drive rod 31 to move, and the meshing of the drive gear 320 with the drive racks 322 drives the left drive rod 30 to move in the opposite direction.

[0056] Furthermore, such as Figures 6 to 8 As shown, it also includes a limiting ring 12, on which a sliding rod 13 (preferably two rods) is fixedly connected. The sliding rod 13 is slidably connected to the moving plate 81, and a limiting spring 14 is sleeved on the sliding rod 13. The two ends of the limiting spring 14 abut against the limiting ring 12 and the moving plate 81, respectively. An adjusting ring 15 is threadedly connected to the lower end of the sliding rod 13. By rotating the adjusting ring 15, the extension length of the lower end of the sliding rod 13 can be changed, thereby adjusting the height of the limiting ring 12. Limiting protrusions 16 are fixed on both the limiting ring 12 and the drive gear 320, and at least two limiting protrusions 16 are provided on both the limiting ring 12 and the drive gear 320, with a gap between them.

[0057] The limit spring 14 also serves as a buffer to prevent collision between the limit ring 12 and the drive gear 320.

[0058] Both the first drive cylinder 80 and the second drive cylinder 321 are preferably hydraulic cylinders. To prevent the piston rod of the second drive cylinder 321 from moving unexpectedly during hoisting (e.g., due to hydraulic lock failure), which would cause the left drive rod 30 and the right drive rod 31 to move arbitrarily, resulting in a reduction in the contact area (or wrap angle) between the lifting sling 6 and the pipe 20, and posing a risk of the pipe 20 slipping, the lifting sling 6 lifts the pipe 20 and creates a gap between the pipe 20 and the support arm 7. Then, the first drive cylinder 80 drives the two support arms 7 to continue closing until the limiting protrusion 16 on the limiting ring 12 engages with the limiting protrusion 16 on the drive gear 320. At this point, the gap between the support arm 7 and the pipe 20 decreases. Because of the mutual engagement between the limiting protrusions 16, the drive gear 320 can be restricted from rotating arbitrarily, thereby restricting the arbitrary movement of the left drive rod 30 and the right drive rod 31.

[0059] When the above structure is adopted, if the left drive rod 30 and the right drive rod 31 are to move in opposite directions through the second drive mechanism 32, the two support arms 7 need to be driven to open until the limiting protrusion 16 on the limiting ring 12 separates from the limiting protrusion 16 on the drive gear 320 before proceeding with the subsequent operation.

[0060] Furthermore, such as Figure 6 As shown, the left drive rod 30 and the right drive rod 31 are slidably connected; specifically, both the left drive rod 30 and the right drive rod 31 are provided with a sliding rod 17 and a sliding groove 18; the sliding rod 17 on the left drive rod 30 is slidably connected to the sliding groove 18 on the right drive rod 31, and the sliding rod 17 on the right drive rod 31 is slidably connected to the sliding groove 18 on the left drive rod 30.

[0061] Furthermore, such as Figure 1 As shown, a protective roller 19 is rotatably connected to one side of the mounting plate 1. The lifting sling 6 contacts the outer side of the protective roller 19, which can prevent friction between the lifting sling 6 and the mounting plate 1.

[0062] The above description only illustrates preferred embodiments of the present invention, but the present invention is not limited to the above embodiments.

Claims

1. A pipeline construction device, characterized in that: The assembly includes a mounting plate (1), a winding cylinder (2), and a gathering assembly (3); the mounting plate (1) is fixedly connected to a mounting ear (4), the winding cylinder (2) is located on one side of the mounting plate (1) and is rotatably connected to the mounting plate (1), and the mounting plate (1) is provided with a geared motor (5) for driving the winding cylinder (2) to rotate; a lifting sling (6) is wound on the winding cylinder (2); a pair of support arms (7) are hinged on the mounting plate (1), and the mounting plate (1) is provided with a first drive mechanism (8) for driving the pair of support arms (7) to open and close; one of the support arms (7) is provided with a sling hook (9) and a limiting shaft (70), and the drooping position of the lifting sling (6) is limited by the limiting shaft (70); The gathering assembly (3) includes a left drive rod (30) and a right drive rod (31), both of which are slidably connected to the mounting plate (1). The left drive rod (30) is provided with a clamping assembly (33), and the right drive rod (31) is rotatably connected with a pair of limiting rollers (34). One end of the sling hook (9) passes between the pair of limiting rollers (34) and is fixedly connected to a connecting shaft (35). The connecting shaft (35) cooperates with the sling hook (9). The connecting shaft (35) is fixedly connected to a fixed shaft (36) through a connecting belt (350). The mounting plate (1) is provided with a second drive mechanism (32) that drives the left drive rod (30) and the right drive rod (31) to move towards or away from each other. During hoisting, the fixed shaft (36) is placed into the clamping assembly (33), and the fixed shaft (36) is clamped by the clamping assembly (33). Finally, the left drive rod (30) and the right drive rod (31) move towards each other through the second drive mechanism (32). After the movement towards each other ends, the clamping assembly (33) is locked.

2. The pipeline construction device according to claim 1, characterized in that: The clamping assembly (33) includes a fixed roller (330) and a movable roller (331). The fixed roller (330) is rotatably connected to the left drive rod (30), and the movable roller (331) is slidably connected to the left drive rod (30). The left drive rod (30) is provided with a spring assembly (37) for pushing the movable roller (331) to move.

3. A pipeline construction device according to claim 2, characterized in that: The spring assembly (37) includes a push rod (370), a spring (371), and a limiting plate (372); the push rod (370) is slidably connected to the left drive rod (30); the spring (371) is sleeved on the outside of the push rod (370) and the two ends of the spring (371) abut against the push rod (370) and the left drive rod (30) respectively; one end of the push rod (370) contacts the outer surface of the movable roller (331); the limiting plate (372) is fixedly connected to the mounting plate (1); when the other end of the push rod (370) abuts against the limiting plate (372), it can restrict the movement of the push rod (370) and put the clamping assembly (33) in a locked state.

4. A pipeline construction device according to claim 1, characterized in that: The sling hook (9) is slidably connected to the support arm (7), and a compression spring (90) is provided between the sling hook (9) and the support arm (7).

5. A pipeline construction device according to claim 1, characterized in that: Several support rollers (10) are rotatably connected to the inner surfaces of a pair of support arms (7).

6. A pipeline construction device according to claim 5, characterized in that: It also includes a rubber protective plate (11), and each support arm (7) is detachably connected to a rubber protective plate (11), and the rubber protective plate (11) is provided with a groove for accommodating the support roller (10).

7. A pipeline construction device according to claim 1, characterized in that: The first drive mechanism (8) includes a first drive cylinder (80) and a moving plate (81); the cylinder body of the first drive cylinder (80) is fixedly connected to the mounting plate (1); the piston rod of the first drive cylinder (80) is fixedly connected to the moving plate (81); the support arm (7) is connected to the moving plate (81) through a connecting rod (82), and the two ends of the connecting rod (82) are respectively hinged to the support arm (7) and the moving plate (81).

8. A pipeline construction device according to claim 7, characterized in that: The second drive mechanism (32) includes a drive gear (320) and a second drive cylinder (321); the drive gear (320) is rotatably connected to the mounting plate (1), the cylinder body of the second drive cylinder (321) is fixedly connected to the mounting plate (1), and the piston rod of the second drive cylinder (321) is fixedly connected to the right drive rod (31); both the left drive rod (30) and the right drive rod (31) are fixed with drive racks (322) that mesh with the drive gear (320); the drive gear (320) is located between the two drive racks (322).

9. A pipeline construction device according to claim 8, characterized in that: It also includes a limiting ring (12), which is sleeved on the piston rod of the first drive cylinder (80). A sliding rod (13) is fixedly connected to the limiting ring (12), and the sliding rod (13) is slidably connected to the moving plate (81). A limiting spring (14) is sleeved on the sliding rod (13), and the two ends of the limiting spring (14) abut against the limiting ring (12) and the moving plate (81) respectively. An adjusting ring (15) is threadedly connected to the lower end of the sliding rod (13). Limiting protrusions (16) are fixed on both the limiting ring (12) and the drive gear (320).

10. A pipeline construction device according to claim 1, characterized in that: The left drive rod (30) and the right drive rod (31) are slidably connected; a protective roller (19) is rotatably connected to one side of the mounting plate (1).

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