A prestressed pipe pile hoisting tool

Abstract

This utility model relates to the technical field of pipe pile hoisting, and proposes a hoisting tool for prestressed pipe piles, including a hook. A hoisting ring is rotatably connected to the top of the hook, and a support mechanism is located at the tip of the hook. The support mechanism includes a horizontally arranged support block, which is slidably connected to the hook tip and connected to an adjustment mechanism that drives its vertical movement. A wedge block is fixed to the bottom of the support block. The adjustment mechanism includes a second wedge block that matches the first wedge block, and the inclined surfaces of the second wedge block and the first wedge block are in contact and slidably connected. The advantages of this utility model are: by driving the support block vertically upward through the adjustment mechanism, the support block abuts against the inner wall of the pipe pile. The extension and retraction adjustment of the support block can adapt to pipe piles with different inner diameter specifications, and the hoisting operation of pipe piles of various diameters can be completed without changing special hoisting tools.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe pile hoisting, in particular, to a hoisting tool for prestressed pipe piles. Background Art

[0002] As a kind of high-strength, low-cost precast concrete component, prestressed pipe piles are widely used in building foundation engineering. They greatly improve construction efficiency through factory prefabrication and on-site pile sinking. Hoisting operation is a key link in the production, transportation and on-site transfer of pipe piles, which directly affects construction safety and the structural integrity of pipe piles.

[0003] At present, the hoisting of prestressed pipe piles mainly adopts the following traditional methods: 1. External binding with steel wire rope: Hoisting is carried out by winding the steel wire rope around the outer side of the end of the pipe pile. Since the contact area between the steel wire rope and the pipe pile is small, the pulling force during hoisting is concentrated on the joint between the steel end plate and the concrete at the end of the pipe pile, which easily causes crushing and cracking of the end concrete. The damage is particularly significant to large-diameter thin-walled pipe piles, which directly affects the structural strength of the pipe pile.

[0004] 2. Rope passing through inner hole: It requires manual work to pass the steel wire rope through the inner hole of the pipe pile, and hoisting by bottom supporting. This method requires operators to enter the interior of the pipe pile for rope passing, which has potential safety hazards such as oxygen deficiency and asphyxiation, rolling and collision of the pipe pile; meanwhile, the friction between the steel wire rope and the inner wall of the pipe pile will cause wear of the concrete on the inner wall, and the rope passing process is time-consuming, laborious and inefficient.

[0005] 3. Hoisting by electromagnetic chuck: It is only applicable to pipe piles with steel end plates, and hoisting is realized by adsorbing the steel end plates through electromagnetic force. However, it relies on power supply, and pipe pile falling accidents are prone to occur when power is cut off, resulting in poor safety; it also has high requirements for the flatness of the steel end plate, and slipping is prone to occur when the adsorption is not firm. Meanwhile, it cannot adapt to pipe pile types without steel end plates, so the universality is limited.

[0006] In summary, the existing hoisting technologies generally have problems such as high risk of pipe pile damage, poor operation safety, low operation efficiency and insufficient universality, and can hardly meet the requirements of "non-damaging, safe, efficient and adaptable" for prestressed pipe pile hoisting in modern construction engineering. Content of Utility Model

[0007] The utility model provides a hoisting tool for prestressed pipe piles. An adjusting mechanism drives a supporting block to move vertically upward, so that the supporting block abuts against the inner wall of the pipe pile. The hoisting tool adopts an internal support type structural design, can adapt to pipe piles with different inner diameter specifications through the telescopic adjustment of the supporting block, and can complete hoisting operation of pipe piles with various pipe diameters without replacing special hoisting tools.

[0008] For this purpose, the following technical solution is adopted: A prestressed concrete pipe pile hoisting tool includes a hook with a hoisting ring rotatably connected to its top. The hook tip has a support mechanism, which includes a horizontally arranged support block. The support block is slidably connected to the hook tip and is connected to an adjustment mechanism that drives its vertical movement. A wedge block is fixed to the bottom of the support block. The adjustment mechanism includes a wedge block two that matches the wedge block one. The inclined surfaces of the wedge block two and the wedge block one are closely fitted and slidably connected. The wedge block two drives the wedge block one to move vertically through horizontal movement and is connected to a power source that drives its horizontal movement.

[0009] A further technical solution is that a connecting block is fixed on the support block, and two vertically arranged baffles are fixed on the side wall of the hook tip corresponding to the position of the connecting block. A sliding channel for the connecting block to be inserted is formed between the two baffles, and the connecting block is inserted into the sliding channel and slides with the baffles on both sides.

[0010] A further technical solution is that a horizontally arranged guide block is fixed at the bottom of the second wedge along its direction of movement, and a horizontally arranged guide groove is opened at the tip of the hook corresponding to the position of the guide block, and the guide block is embedded in the guide groove and slides in cooperation with it.

[0011] A further technical solution is that a limiting block is fixed on the inclined surface where the second wedge block and the first wedge block are in contact, and a limiting groove is formed on the first wedge block at the position corresponding to the limiting block, and the limiting block is embedded in the limiting groove and slides with it.

[0012] A further technical solution is that the power source includes a horizontally arranged screw, which passes through the side wall of the hook and is threadedly connected to it, and the screw is rotatably connected to the wedge block.

[0013] A further technical solution is that the top surface of the support block is an anti-slip surface.

[0014] The working principle and beneficial effects of this application are as follows: This lifting tool adopts an internal support structure design. The support block is driven to move vertically upward through the adjustment mechanism, so that the support block abuts against the inner wall of the pipe pile. The support block can be adjusted to accommodate pipe piles with different inner diameter specifications. It can complete the lifting operation of pipe piles of various diameters without changing special lifting tools. At the same time, it avoids the risk of slippage caused by the smooth or damaged surface of the pipe pile due to traditional external clamping or binding methods, thus improving safety. Attached Figure Description

[0015] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a schematic diagram of the exploded structure of this application; Figure 3 This is a schematic diagram of the structure of the adjusting mechanism described in this application; Figure 4 This is a schematic diagram of the structure of the wedge block II described in this application.

[0017] In the diagram: 1. Hook; 2. Lifting ring; 3. Support mechanism; 31. Support block; 32. Wedge block one; 33. Connecting block; 4. Adjustment mechanism; 41. Wedge block two; 42. Limiting block; 43. Screw; 44. Guide block; 5. Stop bar. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0019] like Figures 1-4 As shown, a prestressed concrete pipe pile hoisting tool includes a hook 1, a hoisting ring 2 rotatably connected to the top of the hook 1, a support mechanism 3 at the tip of the hook 1, the support mechanism 3 including a horizontally arranged support block 31, the support block 31 being slidably connected to the tip of the hook 1 and connected to an adjustment mechanism 4 for driving its up-and-down movement, a wedge block 32 fixed to the bottom of the support block 31, the adjustment mechanism 4 including a wedge block 41 that matches the wedge block 32, the wedge block 41 and the wedge block 32 having matching inclined surfaces that are closely fitted and slidably connected, the wedge block 41 driving the wedge block 32 to move up and down through horizontal movement, and connected to a power source for driving its horizontal movement.

[0020] In this embodiment, the tool is a special hoisting tool designed specifically for hoisting prestressed pipe piles without damaging the pipe piles and with safe operation. Its core innovation lies in the fact that through an adjustable support mechanism, it can adapt to pipe piles with different inner diameters and achieve support hoisting from the inner wall of the pipe pile, thereby greatly improving the stability and safety of the hoisting process and solving the problem that the concrete at the end of the pipe pile is easily crushed and slipped when hoisting prestressed pipe piles with traditional wire ropes.

[0021] Specifically, the lifting tool is initially in a retracted state. The hook 1, in its retracted state, is manually inserted into the pipe pile. The horizontal section of the hook 1 first abuts against the bottom of the inner wall of the pipe pile. The adjusting mechanism 4 then drives the support block 31 to move vertically upwards until it abuts against the inner wall of the pipe pile. At this point, the lifting tool is in its extended state. The top of the support block 31 has an anti-slip structure, which consists of serrated protrusions or a frosted surface. This increases the friction between the support block 31 and the inner wall of the pipe pile, further reducing the risk of detachment.

[0022] The internal support structure is suitable for hoisting pipe piles of different diameters, avoiding the risk of slippage caused by the smooth or damaged surface of the pipe pile due to traditional external clamping or binding methods, thus improving safety. The crane slowly lifts, and the lifting force is transmitted to the hook 1 through the lifting ring 2, thereby hoisting and transferring the pipe pile. After the pipe pile is placed in place, the crane releases the hook and drives the support block 31 to move vertically downward through the adjustment mechanism 4, so that the support block 31 is separated from the inner wall of the pipe pile. Finally, the lifting device is removed from the pipe pile to complete the operation.

[0023] During the process, the power source propels wedge block 2 41 horizontally. The inclined surface of wedge block 2 41 contacts the inclined surface of wedge block 1 32 and relative sliding occurs. Under the action of the inclined surface, the horizontal thrust of wedge block 2 42 is decomposed into an upward component. This upward component lifts wedge block 1 32, and then pushes the entire support mechanism 3 upward along the sliding channel through the connecting block 33. The support block 31 rises accordingly until its top tightly abuts against the inner wall of the pipe pile, generating sufficient preload to ensure that slippage does not occur during hoisting. It should be noted that the hook 1 includes a vertical section and a horizontal section. When the hoisting tool is in the extended state, the horizontal section of the hook 1 and the support block 31 abut against the inner wall of the pipe pile.

[0024] like Figure 2 As shown, a connecting block 33 is fixed on the support block 31. Two vertically arranged baffles 5 are fixed on the side wall of the tip of the hook 1 corresponding to the position of the connecting block 33. A sliding channel for the connecting block 33 to be inserted is formed between the two baffles 5. The connecting block 33 is inserted into the sliding channel and slides with the baffles 5 on both sides. The sliding channel restricts the movement direction of the support block 31, so that it can only slide vertically along the sliding channel.

[0025] like Figures 3-4 As shown, a guide block 44 is fixedly connected to the bottom of the second wedge block 41. A guide groove is provided on the hook 1 at the position corresponding to the guide block 44. The guide block 44 is embedded in the guide groove and slides with the guide groove. The guide block 44 and the guide groove constrain the movement trajectory of the second wedge block 41, ensuring that it moves only in a straight line in the horizontal direction.

[0026] like Figure 3As shown, a limiting block 42 is fixedly connected to the inclined surface of wedge block 2 41. A limiting groove is formed on the inclined surface of wedge block 1 32 corresponding to the position of the limiting block 42. The limiting block 42 is embedded in the limiting groove and slides in cooperation with the limiting groove. The limiting block 42 and the limiting groove prevent wedge block 1 32 and wedge block 2 41 from slipping relative to each other, ensuring the stability of the inclined surface fit and enhancing the safety of hoisting.

[0027] like Figure 3 As shown, one embodiment of the power source includes a horizontally arranged screw 43, which passes through and is threadedly connected to the side wall of the hook 1. The screw 43 is rotatably connected to a second wedge block 41. The screw 43 serves as the power source, driving the second wedge block 41 to move horizontally through rotation.

[0028] The lifting tool is initially in a retracted state. The hook 1, in its retracted state, is manually placed into the pipe pile. The horizontal section of the hook 1 first abuts against the bottom of the inner wall of the pipe pile. The support block 31 is then driven vertically upward by the adjusting mechanism 4 until it abuts against the inner wall of the pipe pile. At this point, the lifting tool is in an extended state. It adopts an internal support structure, which avoids the risk of slippage that may occur due to the smooth or damaged surface of the pipe pile, which is a problem with traditional external clamping or binding methods, thus improving safety. The crane slowly lifts the pipe pile, and the lifting force is transmitted to the hook 1 through the lifting ring 2, thereby lifting and transferring the pipe pile. After the pipe pile is placed in position, the crane releases the hook and the support block 31 is driven vertically downward by the adjusting mechanism 4, causing the support block 31 to detach from the inner wall of the pipe pile. Finally, the lifting tool is removed from the pipe pile, completing the operation.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A prestressed concrete pipe pile hoisting tool, characterized in that: The device includes a hook (1), the top of which is rotatably connected to a lifting ring (2), and the tip of the hook (1) has a support mechanism (3). The support mechanism (3) includes a horizontally arranged support block (31), which is slidably connected to the tip of the hook (1) and connected to an adjustment mechanism (4) that drives its up and down movement. The bottom of the support block (31) is fixed with a wedge block one (32). The adjustment mechanism (4) includes a wedge block two (41) that matches the wedge block one (32). The wedge block two (41) and the wedge block one (32) have matching inclined surfaces that are close together and slidably connected. The wedge block two (41) drives the wedge block one (32) to move up and down through horizontal movement and is connected to a power source that drives its horizontal movement.

2. The prestressed pipe pile hoisting tool according to claim 1, characterized in that, A connecting block (33) is fixed on the support block (31). Two vertically arranged baffles (5) are fixed on the side wall of the tip of the hook (1) corresponding to the position of the connecting block (33). A sliding channel for the connecting block (33) to be inserted is formed between the two baffles (5). The connecting block (33) is inserted into the sliding channel and slides with the baffles (5) on both sides.

3. The prestressed pipe pile hoisting tool according to claim 1, characterized in that, The bottom of the second wedge block (41) is fixed with a horizontally arranged guide block (44) along its direction of movement. The tip of the hook (1) is provided with a horizontally arranged guide groove corresponding to the position of the guide block (44). The guide block (44) is embedded in the guide groove and slides in cooperation with it.

4. The prestressed pipe pile hoisting tool according to claim 1, characterized in that, A limiting block (42) is fixed on the inclined surface where the second wedge block (41) and the first wedge block (32) make contact. A limiting groove is opened on the first wedge block (32) at the position corresponding to the limiting block (42). The limiting block (42) is embedded in the limiting groove and slides with it.

5. A prestressed pipe pile hoisting tool according to claim 1, characterized in that, The power source includes a horizontally arranged screw (43) that passes through the side wall of the hook (1) and is threadedly connected thereto. The screw (43) is rotatably connected to the second wedge block (41).

6. The prestressed pipe pile hoisting tool according to claim 1, characterized in that, The top surface of the support block (31) is an anti-slip surface.

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