Large-diameter sewer pipe hoisting and construction auxiliary device

Abstract

This utility model discloses a hoisting and construction auxiliary device for large-diameter drainage pipes, which solves the problem that existing hoisting devices cannot adjust the pitch angle of the hoisted pipe after it has been hoisted into place. It includes a main beam, a secondary beam, a cantilever, a miniature winch, and an operating handle. The main beam has a vertically extending section at the rear third of its length, with pulleys fixedly installed on its side. Two L-shaped crank arms are fixedly connected to the lower end of the vertical section. The ends of the two L-shaped crank arms have pin holes, and wear-resistant steel pins are used to hinge them to the rear end of the cantilever. The miniature winch drives the cantilever to adjust its angle. This cantilever structure, controlled by the miniature winch's rope winding and unwinding, allows for convenient and rapid adjustment of the pitch angle of the precast pipe, facilitating docking during hoisting. The hoisting and installation operations are safe, and installation and dismantling are quick, saving time and labor, and greatly improving construction efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of hoisting and construction tools for large-diameter concrete pipes. Background Technology

[0002] In the hoisting of large-diameter concrete pipes, due to the significant weight of the pipes, both safety and efficiency must be considered. Typically, two standard lifting points are selected approximately one-quarter of the pipe's length from the end to minimize bending moment during hoisting and prevent excessive downward deflection in the middle or upward tilting at both ends. Specifically, two synthetic fiber slings are passed under the pipe, with both ends secured to lifting points on a balance beam. The main lifting point of the balance beam is attached to the crane hook. A trial lift is performed to slightly taut the slings. The concrete pipe is lifted approximately 10-20 cm off the ground or transport vehicle and held suspended for 2-5 minutes before the actual hoisting begins. Once above the target location, the pipe is lowered extremely slowly and smoothly. Personnel in the trench precisely align the pipe with the socket of the installed pipe, making minor adjustments just before contact, and then slowly lower it to the designed position. After confirming the pipe is securely placed, the crane is directed to slowly release the slings and release the lifting equipment. Finally, carefully remove the slings, taking care not to disturb the already positioned pipe body, to complete the hoisting operation.

[0003] This type of hoisting method has low operational efficiency and requires multiple bindings with slings, posing safety hazards. To solve the hoisting problem of concrete pipes, the unit developed a rigid hoisting device. For example, Chinese patent document CN217201610U discloses a drainage pipe loading and unloading device, including a first connector, a U-shaped lifting member, and a connecting steel wire rope. The first connector extends in the left-right direction and is provided with a first lifting lug for connecting to hoisting equipment and a second lifting lug connected to the U-shaped lifting member via the connecting steel wire rope. There are two U-shaped lifting members, each including a first connecting rod segment, a second connecting rod segment, and a vertical connecting rod segment. A third lifting lug connected to the connecting steel wire rope is connected to the first rod segment. The distance between the opposite ends of the two first connecting rod segments in the left-right direction is adjustable. Chinese patent document CN217025009U discloses a concrete drainage pipe hoisting device, wherein the clamping member has a clamping channel with an opening on one side, the shape of which is adapted to the shape of the concrete drainage pipe to be hoisted, for clamping the concrete drainage pipe to be hoisted; the hanging member is arranged above the clamping member and is connected to the clamping member by a rope, and the hanging member has a first lifting hole for providing a hoisting point for hoisting machinery. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a large-diameter drainage pipe hoisting and construction auxiliary device, which solves the problem that existing hoisting devices cannot adjust the pitch angle of the hoisted pipe after it has been hoisted into place, thus meeting the requirements for pipe angle adjustment during pipe splicing and docking construction.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A large-diameter drainage pipe hoisting and construction auxiliary device includes a main beam, a secondary beam, a cantilever, a miniature winch, and an operating handle. The main beam and secondary beam, arranged in parallel, are mechanically connected by wire ropes. The device is characterized by a vertically extending section at the rear third of the main beam, with pulleys fixedly installed on the side of this section. Two L-shaped crank arms are fixedly connected to the lower end of the vertical section. The two L-shaped crank arms are parallel to each other and have equally spaced L-shaped channels between them. Pin holes are provided at the ends of the two L-shaped crank arms, and wear-resistant steel pins are used to hinge them to the rear end of the cantilever. A wire rope mounting seat is provided on the cantilever. A steel plate is welded and fixed to the rear end of the main beam. A miniature winch and an operating handle are installed on this steel plate. The wire rope in the miniature winch passes over the pulleys and is secured to the wire rope mounting seat on the cantilever. The miniature winch drives the cantilever to adjust its angle.

[0006] Furthermore, the main beam, secondary beam, and cantilever are made of galvanized square steel pipe or stainless steel pipe.

[0007] Furthermore, the operating handle is U-shaped, and a boat-shaped button is provided on the operating handle for controlling the forward, reverse and pause functions of the miniature winch.

[0008] Furthermore, a rubber jacket is compositely installed on the front two-thirds of the cantilever.

[0009] Furthermore, the outer surface of the rubber jacket is provided with an uneven structure.

[0010] Furthermore, the pitch angle adjustment range of the cantilever is ±30°.

[0011] Furthermore, the pitch angle adjustment range of the cantilever is ±15°.

[0012] The beneficial effects of this utility model are: This utility model relates to a tool specifically designed for the hoisting and docking installation of large-diameter precast pipes. It utilizes a cantilever arm for rapid insertion of the precast pipe, maintaining an upward tilt during hoisting to effectively prevent slippage and ensure high safety. Furthermore, the cantilever structure, controlled by a miniature winch, allows for convenient and rapid adjustment of the precast pipe's tilt angle, facilitating docking during hoisting. This results in safe hoisting and installation operations, quick installation and dismantling, saving time and labor, and significantly improving construction efficiency. Further details are provided with specific embodiments. Attached Figure Description

[0013] Figure 1 This is a three-dimensional view of the device, showing the horizontal state of the cantilever.

[0014] Figure 2 This is a three-dimensional view of the device, showing the tilted state of the cantilever.

[0015] Figure 3 This indicates the device is in the hoisting and release state.

[0016] Figure 4 This is the hoisting state of the device.

[0017] Figure 5 for Figure 4 The corresponding side view.

[0018] Figure 6 This is step one of the hoisting process.

[0019] Figure 7 This is step two in the hoisting process.

[0020] Figure 8 This is step three in the hoisting process.

[0021] Figure 9 This is step three in the hoisting process.

[0022] In the diagram: 10. Main beam, 11. Vertical section, 12. Steel plate, 13. Pulley, 20. Sub-beam, 30. Cantilever, 31. Rubber jacket, 40. L-shaped crank arm, 41. Wear-resistant steel pin, 50. Miniature winch, 60. Operating handle, 61. Boat-shaped button, 70. Precast pipe, 80. Steel wire rope. Detailed Implementation

[0023] A large-diameter drainage pipe hoisting and construction auxiliary device is used for hoisting and assisting in the connection construction of precast concrete pipes 70. This embodiment will be combined with the product structure. Figure 1 To be continued Figure 5 The specific implementation process will be explained in detail.

[0024] This device consists of a main beam 10, a secondary beam 20, a cantilever 30, a miniature winch 50, an operating handle 60, and a wire rope 80. The main beam 10, secondary beam 20, and cantilever 30 are made of galvanized square steel pipes or stainless steel pipes and can be formed by welding or other methods. The following is a detailed structural description.

[0025] The main beam 10 is a long galvanized square steel pipe, with two wire rope mounting seats welded to its surface for connection to the secondary beam 20 via wire ropes 80. The connected main and secondary beams 20 are arranged parallel to each other, with the secondary beam 20 being slightly shorter than the main beam 10 in length. The secondary beam 20 is used to connect to the crane hook for lifting operations.

[0026] A vertically oriented vertical section 11 is welded downwards at one-third of the rear section of the main beam 10. Near the overlap between the vertical section 11 and the main beam 10, a pulley mounting seat is welded and fixed to the rear side of the vertical section 11 for mounting a pulley 13. The pulley 13 is used to redirect the wire rope 80. Two L-shaped crank arms 40 are welded to the lower end of the vertical section 11. The two L-shaped crank arms 40 are parallel to each other and form an L-shaped, equally spaced channel between them. This channel is used to mount the cantilever 30. Specifically, a pin hole is provided at the end of each of the two L-shaped crank arms 40, and a wear-resistant steel pin 41 is used to hinge the cantilever 30 to the rear end of the cantilever 30 at the pin hole. A wire rope mounting seat is provided at one-third of the distance from the hinge point on the cantilever 30 for securing the wire rope 80.

[0027] A steel plate 12 is welded and fixed at the rear end of the main beam 10. The steel plate 12 is set horizontally, and a miniature winch 50 is fixedly installed on the lower surface of the steel plate 12. The wire rope 80 in the miniature winch 50 passes around the pulley and is fixed to the wire rope mounting seat of the cantilever 30. The angle of the cantilever 30 is adjusted by the action of the miniature winch 50. Specifically, when the miniature winch 50 winds up the rope, the cantilever 30 swings upward. When the miniature winch 50 releases the rope, the cantilever 30 swings downward under its own weight.

[0028] An operating handle 60 is fixedly connected above the steel plate 12. The operating handle 60 is U-shaped and is used for gripping by ground operators. A boat-shaped button 61 is provided on the operating handle 60. The boat-shaped button 61 is used to control the forward, reverse, and pause of the miniature winch 50, and has three gears. Installing the boat-shaped button on the operating handle 60 makes it convenient for operators to change gears.

[0029] A rubber jacket 31 is laminated on the front two-thirds of the cantilever 30. The rubber jacket 31 is fixed to the outer surface of the cantilever 30 to protect the cantilever 30 and form a protection for the precast concrete pipe 70. The outer surface of the rubber jacket 31 is provided with a concave-convex structure, which has the dual functions of buffering and anti-slip.

[0030] The method of using this device is as follows: Step 1: Hoist the device onto the crane hook. Ground operators adjust the cantilever 30 to a horizontal position and, with the crane's assistance, insert it into the inner cavity of the precast concrete pipe 70. Then, the operator manipulates the mini winch 50 to reel in the rope, causing the cantilever 30 to tilt upwards. Once this tilt angle is greater than 15°, lifting begins. (Refer to...) Figure 6 After hoisting the precast concrete pipe 70 off the ground and holding it suspended for 2-5 minutes, the actual hoisting begins. Once it reaches the target location, the precast concrete pipe 70 is slowly and steadily lowered. Then, the operators in the trench gradually bring the pipe closer and, by controlling the release of the rope using the mini winch 50, tilt the opening of the precast pipe 70 downwards. Figure 7 That is, align the end of the precast pipe 70 with the socket of the installed pipe, wait for the two pipes to contact each other, and then slowly lower it to the socket position. During this process, a crane is used to assist in achieving a one-time socket connection, and the socket accuracy is ensured by adjusting the tilt angle. After the precast concrete pipe 70 is firmly placed, the crane is directed to loosen the slings and pull out the cantilever 30. (Refer to...) Figure 8 and Figure 9 During the extraction process, be careful to avoid bumping or disturbing the already positioned pipe body, and complete one hoisting operation.

Claims

1. A hoisting and construction auxiliary device for large-diameter drainage pipes, comprising a main beam (10), a secondary beam (20), a cantilever (30), a miniature winch (50), and an operating handle (60), wherein the parallel main beam (10) and secondary beam (20) are mechanically connected by wire ropes, characterized in that, The main beam (10) has a vertically extending section (11) at the rear third of its length, and a pulley (13) is fixedly installed on the side of the vertical section (11). Two L-shaped crank arms (40) are fixedly connected to the lower end of the vertical section (11). The two L-shaped crank arms (40) are parallel to each other and have an L-shaped, equally spaced channel between them. Pin holes are provided at the ends of the two L-shaped crank arms (40), and wear-resistant steel pins (41) pass through the pin holes. The cantilever (30) is hinged to the rear end of the cantilever (30), and a wire rope mounting seat is provided on the cantilever (30). A steel plate (12) is fixedly provided at the rear end of the main beam (10). A miniature winch (50) and an operating handle (60) are installed on the steel plate (12). The wire rope (80) in the miniature winch (50) passes around the pulley (13) and is fixed at the wire rope mounting seat of the cantilever (30). The miniature winch (50) drives the cantilever (30) to adjust the angle.

2. A large diameter sewer pipe hoisting and construction assisting apparatus according to claim 1, characterized in that, The main beam (10), secondary beam (20), and cantilever (30) are made of galvanized square steel pipe or stainless steel pipe.

3. The large-diameter sewer pipe hoisting and construction assisting apparatus according to claim 1, characterized by The operating handle (60) is U-shaped, and a boat-shaped button (61) is provided on the operating handle (60) for controlling the forward rotation, reverse rotation and pause of the micro winch (50).

4. The large-diameter sewer pipe hoisting and construction assisting apparatus according to claim 1, characterized by A rubber jacket (31) is compositely installed at the front two-thirds of the cantilever (30).

5. A large diameter sewer pipe hoisting and construction aid according to claim 4, characterised in that, The outer surface of the rubber jacket (31) is provided with a textured structure.

6. The auxiliary device for hoisting and constructing large-diameter drainage pipelines according to claim 5, characterized in that, The pitch angle adjustment range of the cantilever is ±30°.

7. A large diameter sewer pipe hoisting and construction aid according to claim 6, characterised in that, The pitch angle adjustment range of the cantilever is ±15°.

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