Bored pile reinforcement cage hoisting and lowering device and construction method

Abstract

This application relates to the technical field of lowering reinforcing cages for bored piles, and particularly to a device and construction method for hoisting and lowering reinforcing cages for bored piles. The device includes a base with positioning holes, and positioning claws horizontally slidably connected to the base. Each positioning claw has two rotating wheels, and a conveyor belt is wrapped around the two rotating wheels for contact with the reinforcing cage. The base is installed at the pile hole, with the positioning holes coaxially aligned with the pile hole. The reinforcing cage passes through the positioning holes, and the positioning claws slide to clamp and position the reinforcing cage, ensuring that the reinforcing cage is coaxially aligned with the pile hole. When the positioning claws clamp the reinforcing cage, the conveyor belt contacts the reinforcing cage, and the direction of movement of the conveyor belt is consistent with the direction of movement of the reinforcing cage. As the reinforcing cage is gradually lowered, it drives the conveyor belt and rotating wheels to rotate, thereby reducing the friction between the conveyor belt and the reinforcing cage, protecting the conveyor belt, and ensuring the positional accuracy of the reinforcing cage during the lowering process without affecting its operation.

Description

Technical Field

[0001] This application relates to the technical field of lowering the reinforcing cage of cast-in-place piles, and in particular to a device and construction method for hoisting and lowering the reinforcing cage of bored cast-in-place piles. Background Technology

[0002] Drilled cast-in-place piles are piles made by forming pile holes in the foundation soil on the engineering site through mechanical drilling, steel pipe soil displacement, or manual excavation, and then placing a steel cage in the hole and pouring concrete. According to different hole-forming methods, cast-in-place piles can be divided into several categories such as driven cast-in-place piles, drilled cast-in-place piles, and excavated cast-in-place piles. Before pouring the concrete for a drilled cast-in-place pile, the steel cage needs to be lowered into the borehole.

[0003] Related technology can be found in Chinese Patent Publication No. CN213571925U, which discloses a segmented lowering system for cast-in-place pile reinforcement cages, including: a hoisting device with a driver's cab; a fixing component installed on the hoisting device for fixing the reinforcement cage; a positioning component installed on the side of the pile hole for positioning the reinforcement cage; a positioning data acquisition device installed at the top of the hoisting device for acquiring positioning data of the reinforcement cage; an inclination data acquisition device installed on the fixing component for acquiring inclination data of the reinforcement cage during the lowering process; two display devices installed in the driver's cab of the hoisting device and on one side of the pile hole, respectively; and a control unit installed in the driver's cab and connected to the positioning data acquisition device, the inclination data acquisition device, and the display devices.

[0004] Although the above-mentioned device has a positioning component, it is mainly used to correct and position the steel cage when it is connected to the steel cage, and the positioning accuracy of the steel cage during the lowering process is still relatively poor. Summary of the Invention

[0005] To improve the accuracy of the steel cage lowering process, this application provides a device and construction method for hoisting and lowering the steel cage of bored piles.

[0006] The drilling pile reinforcement cage hoisting and lowering device provided in this application adopts the following technical solution:

[0007] A hoisting and lowering device for a bored pile reinforcement cage includes a base with positioning holes. Positioning claws for clamping the reinforcement cage are horizontally slidably connected to the base. Two rotating wheels are provided on the side of the positioning claws facing the reinforcement cage. The rotating wheels are arranged vertically, and the two rotating wheels are covered with a conveyor belt for contacting the reinforcement cage.

[0008] By adopting the above technical solution, the base is installed at the pile hole, ensuring that the positioning hole is coaxially aligned with the pile hole. The reinforcing cage passes through the positioning hole, and the positioning claws slide to clamp and position the reinforcing cage, ensuring that the reinforcing cage is coaxially aligned with the pile hole. When the positioning claws clamp the reinforcing cage, the conveyor belt contacts the reinforcing cage, and the movement direction of the conveyor belt is consistent with the movement direction of the reinforcing cage. The reinforcing cage is gradually lowered, causing the conveyor belt and rotating wheels to rotate, thereby reducing the friction between the conveyor belt and the reinforcing cage, protecting the conveyor belt, and ensuring the positional accuracy of the reinforcing cage during the lowering process without affecting its descent.

[0009] Preferably, the positioning claw is provided with a mounting plate, and the mounting plate is vertically provided with an adjustment groove. An adjustment screw is rotatably connected in the adjustment groove. The adjustment screw is provided with two sections of threads with opposite directions. Each section of thread is provided with a nut seat. Two rotating wheels are rotatably connected to two nut seats.

[0010] By adopting the above technical solution, the operator can rotate the adjusting screw to drive the two rotating wheels to move in opposite directions, thereby adjusting the distance between the two rotating wheels, that is, adjusting the length of the contact part between the conveyor belt and the reinforcing cage. Since the reinforcing cage has a hollow structure with many through holes on its surface, and the size of the holes on the surface of different specifications of reinforcing cages is also different, the length of the conveyor belt is adjusted according to the structural characteristics of the reinforcing cage itself to prevent the conveyor belt from getting stuck in the through holes on the surface of the reinforcing cage.

[0011] Preferably, a tensioning wheel is slidably connected to the mounting plate, the sliding direction of the tensioning wheel is perpendicular to the direction of the adjusting groove, and the conveyor belt passes around the tensioning wheel.

[0012] By adopting the above technical solution, the rotating wheel adjusts the contact length between the conveyor track and the steel cage, and the tensioning wheel adjusts the tension of the conveyor track to ensure that it is in a taut state.

[0013] Preferably, a tensioning screw perpendicular to the adjusting screw is rotatably connected to the mounting plate, a tensioning seat is mounted on the tensioning screw, and the tensioning wheel is rotatably connected to the tensioning seat.

[0014] By adopting the above technical solution, the operator can rotate the tensioning screw, which in turn drives the tensioning wheel through the tensioning seat. The structure is stable and the operation is convenient.

[0015] Preferably, the tensioning screw and the adjusting screw are connected by a bevel gear pair.

[0016] By adopting the above technical solution, when the operator rotates the adjusting screw to adjust the position of the rotating wheel, the tensioning screw rotates synchronously, thereby adjusting the position of the tensioning wheel at the same time. This allows for the adjustment of the contact length between the conveyor belt and the steel cage while ensuring the tension of the conveyor belt, making operation convenient.

[0017] Preferably, the mounting plate is horizontally slidably connected to the positioning claw, and a buffer spring is connected between the mounting plate and the positioning claw.

[0018] By adopting the above technical solution, the surface of the steel cage is uneven, and the steel cage will inevitably impact the conveyor belt and mounting plate during the lowering process. The buffer spring can buffer the impact of this part, thereby protecting the positioning claw.

[0019] Preferably, the positioning claws are provided in multiple and evenly distributed on the base. A ring gear is rotatably connected to the base, and a positioning screw corresponding to each positioning claw is rotatably connected to the base. The end of the positioning screw is provided with a positioning gear that meshes with the ring gear. A positioning seat is installed on the positioning screw, and the positioning claw is connected to the positioning seat. A starter motor for driving the ring gear to rotate is provided on the base.

[0020] By adopting the above technical solution, the motor starts, driving the ring gear to rotate. The ring gear simultaneously drives all positioning gears to rotate, causing all positioning screws to rotate synchronously. All positioning claws move synchronously to clamp or release the reinforcing cage. The synchronous movement of all positioning claws results in high positioning accuracy and convenient operation.

[0021] Another objective of this application is to provide a construction method for hoisting and lowering the reinforcing cage of a bored pile, including: using a crane to vertically lift the reinforcing cage and transport it to the pile hole;

[0022] The base is installed at the pile hole, and the positioning hole is coaxial and directly opposite the pile hole;

[0023] The reinforcing cage passes through the positioning hole;

[0024] The motor starts, and the positioning claws clamp and fix the side wall of the steel cage.

[0025] The crane lowered the steel cage into the pile hole.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. With the positioning claws, the conveyor track can clamp and position the steel cage to ensure accuracy during lowering. At the same time, the conveyor track can rotate with the steel cage, resulting in less friction between the two and less damage to the conveyor track. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of Example 1;

[0029] Figure 2 This is a schematic diagram of the mounting plate in Example 1.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Base; 11. Positioning hole; 12. Ring gear; 13. Positioning screw; 14. Positioning gear; 15. Positioning seat; 2. Positioning claw; 31. Rotating wheel; 32. Conveyor belt; 33. Tensioning wheel; 4. Mounting plate; 41. Adjusting groove; 42. Adjusting screw; 43. Nut seat; 44. Tensioning screw; 45. Tensioning seat; 46. Buffer spring; 5. Starter motor. Detailed Implementation

[0032] The present application will be further described in detail below with reference to all the accompanying drawings. Example

[0033] This application discloses a device for hoisting and lowering a reinforcing cage for bored piles, as described in the embodiments below. Figure 1 The system includes a base 1, which is installed at the pile hole. A positioning hole 11, coaxial with and directly opposite the pile hole, is provided at the center of the base 1. A positioning mechanism for positioning the reinforcing cage is provided on the base 1.

[0034] Reference Figure 1 The base 1 has an annular groove, and an annular gear ring 12 is rotatably connected in the annular groove. The annular gear ring 12 is coaxially arranged with the positioning hole 11. The base 1 is equipped with a starter motor 5 for driving the annular gear ring 12 to rotate.

[0035] Reference Figure 1 A positioning screw 13 is rotatably connected to the upper surface of the base 1. The positioning screws 13 are evenly distributed between the annular groove and the positioning hole 11. A positioning seat 15 is installed on the positioning screw 13, and the positioning seat 15 is threadedly engaged with the positioning screw 13. When the positioning screw 13 rotates, the positioning seat 15 can move linearly along the positioning screw 13.

[0036] Reference Figure 1 A positioning gear 14 is provided at the end of the positioning screw 13 facing the annular groove. The positioning gear 14 meshes with the annular gear ring 12. When the annular gear ring 12 rotates, it can synchronously drive all the positioning screws 13 to rotate, thereby driving all the positioning seats 15 to perform linear motion. When all the positioning seats 15 move, they either move synchronously towards the positioning hole 11 or synchronously towards the annular groove.

[0037] Reference Figure 1The positioning mechanism includes positioning claws 2 fixed on positioning seats 15. When the starter motor 5 is activated, it synchronously drives all positioning seats 15 and positioning claws 2 to move towards the positioning hole 11. The positioning claws 2 clamp and position the reinforcing cage to ensure the positional accuracy of the reinforcing cage during lowering. After the reinforcing cage is lowered, the starter motor 5 reverses, and all positioning claws 2 move towards the annular groove.

[0038] Reference Figure 1 and Figure 2 The positioning claw 2 is horizontally slidably connected to the mounting plate 4 in the direction of the positioning hole 11. Several buffer springs 46 are provided between the mounting plate 4 and the positioning claw 2. Several protective screws are connected between the mounting plate 4 and the positioning claw 2. One end of the protective screw is threaded to the mounting plate 4, and the other end abuts against the side of the positioning claw 2 facing the positioning hole 11.

[0039] Reference Figure 1 and Figure 2 The mounting plate 4 has a vertically arranged adjustment groove 41 and a horizontally arranged tensioning groove. An adjustment screw 42 is rotatably connected within the adjustment groove 41. The adjustment screw 42 has two sections of threads with opposite directions, symmetrically arranged on the adjustment screw 42. Each section of thread has a thread nut 43, and a rotating wheel 31 is rotatably connected to the thread nut 43. The diameter of the rotating wheel 31 is greater than the distance from the center of the rotating wheel 31 to the side of the mounting plate 4 closest to the positioning hole 11, meaning that part of the rotating wheel 31 extends out of the mounting plate 4. When the operator rotates the adjustment screw 42, the rotating wheels 31 move synchronously in opposite directions, thereby adjusting the distance between the two rotating wheels 31.

[0040] Reference Figure 1 and Figure 2 A tensioning screw 44 is rotatably connected inside the tensioning groove. A tensioning seat 45 is mounted on the tensioning screw 44, and a tensioning wheel 33 is rotatably connected to the tensioning seat 45. The tensioning wheel 33 and the two rotating wheels 31 are collectively wrapped with a ring-shaped conveyor belt 32. Since the rotating wheels 31 partially extend out of the mounting plate 4, the conveyor belt 32 also partially extends out of the mounting plate 4, and this part of the conveyor belt 32 is in contact with the reinforcing cage.

[0041] Reference Figure 1 and Figure 2 The reinforcing cage is inserted into the positioning hole 11, and the positioning claw 2 moves toward the positioning hole 11, i.e., toward the reinforcing cage, until the conveyor belt 32 comes into contact with the reinforcing cage to clamp and position it. When the reinforcing cage is lowered, the conveyor belt 32 rotates synchronously, thereby reducing the friction between the two, ensuring the stability of the reinforcing cage during the lowering process, and reducing the wear of the conveyor belt 32.

[0042] Reference Figure 1 and Figure 2When the uneven surface of the reinforcing cage compresses the conveyor belt 32, the conveyor belt 32 transfers this pressure to the mounting plate 4, which in turn transfers it to the buffer spring 46. The buffer spring 46 buffers and eliminates this pressure, thus ensuring the stability and positioning guidance effect during the lowering of the reinforcing cage. When the positioning claw 2 moves towards the reinforcing cage to clamp it, the protective screw abuts against the positioning claw 2, thereby protecting the buffer spring 46 and preventing it from being squeezed and compressed during clamping, which could cause the buffer spring 46 to fail. After clamping is complete, the protective screw is rotated to release it from the positioning claw 2.

[0043] Reference Figure 1 and Figure 2 The reinforcing cage has a hollow structure with many through holes on its surface, and the size of these through holes varies between different cages. To prevent the conveyor belt 32 from getting completely stuck in the through holes and causing the device to jam, the operator can adjust the length of the contact area between the conveyor belt 32 and the reinforcing cage according to the size of the through holes, i.e., adjust the distance between the two rotating wheels 31. The operator can rotate the adjusting screw 42 to adjust the position of the two rotating wheels 31 to accommodate the requirements of different reinforcing cages.

[0044] Reference Figure 1 and Figure 2 The tensioning screw 44 and the adjusting screw 42 are connected by a bevel gear. When the adjusting screw 42 rotates, the tensioning screw 44 rotates synchronously. When the two rotating wheels 31 move towards each other, the tensioning wheel 33 moves away from the rotating wheels 31. When the two rotating wheels 31 move away from each other, the tensioning wheel 33 moves towards the rotating wheels 31.

[0045] Reference Figure 1 and Figure 2 When the operator adjusts the rotating wheel 31, changing the length of the contact area between the conveyor track 32 and the reinforcing cage, the tension of the conveyor track 32 itself also changes. To ensure the tension of the conveyor track 32, the tensioning wheel 33 adjusts the tension of the conveyor track 32. When the operator rotates the adjusting screw 42, the tensioning screw 44 moves synchronously, causing the tensioning wheel 33 and the two rotating wheels 31 to move synchronously, adjusting the length of the contact area between the conveyor track 32 and the reinforcing cage while ensuring the tension of the conveyor track 32 itself.

[0046] The implementation principle of the drilling pile reinforcement cage hoisting and lowering device in this embodiment is as follows: the reinforcement cage is lowered into the pile hole through the positioning hole 11, the start motor 5 is activated, and the positioning claw 2 moves towards the reinforcement cage until the conveyor belt 32 contacts the reinforcement cage and clamps and fixes it. The reinforcement cage is gradually lowered, and the conveyor belt 32 rotates accordingly to position the reinforcement cage and ensure the accuracy of the lowering. Example

[0047] A construction method for a drilling pile reinforcement cage hoisting and lowering device includes: a crane vertically hoisting the reinforcement cage and transporting it to the pile hole; a base being installed at the pile hole, with the positioning hole coaxial and aligned with the pile hole; the reinforcement cage passing through the positioning hole; the motor being started, and the positioning claw clamping and fixing the side wall of the reinforcement cage; and the crane lowering the reinforcement cage into the pile hole.

[0048] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for hoisting and lowering reinforcing cages for bored piles, characterized in that: Includes a base (1), on which a positioning hole (11) is provided, and a positioning claw (2) for clamping a steel cage is horizontally slidably connected on the base (1). The positioning claw (2) has two rotating wheels (31) on the side facing the steel cage. The rotating wheels (31) are arranged in a vertical direction, and the two rotating wheels (31) are wrapped with a conveyor belt (32) for contacting the steel cage. The positioning claw (2) is provided with a mounting plate (4), and the mounting plate (4) is vertically provided with an adjustment groove (41). An adjustment screw (42) is rotatably connected in the adjustment groove (41). The adjustment screw (42) is provided with two sections of threads with opposite directions. Each section of thread is provided with a nut seat (43). Two rotating wheels (31) are rotatably connected to two nut seats (43). A tension wheel (33) is slidably connected to the mounting plate (4). The sliding direction of the tension wheel (33) is perpendicular to the direction of the adjusting groove (41). The conveyor belt (32) passes around the tension wheel (33). The mounting plate (4) is rotatably connected to a tensioning screw (44) perpendicular to the adjusting screw (42), and a tensioning seat (45) is mounted on the tensioning screw (44). The tensioning wheel (33) is rotatably connected to the tensioning seat (45). The tensioning screw (44) and the adjusting screw (42) are connected by a bevel gear pair; The positioning claws (2) are provided in multiple and evenly distributed on the base (1). A ring gear (12) is rotatably connected to the base (1). A positioning screw (13) corresponding to the positioning claws (2) is rotatably connected to the base (1). The end of the positioning screw (13) is provided with a positioning gear (14) that meshes with the ring gear (12). A positioning seat (15) is installed on the positioning screw (13). The positioning claws (2) are connected to the positioning seat (15). A starter motor (5) for driving the ring gear (12) to rotate is provided on the base (1).

2. The device for hoisting and lowering the reinforcing cage of a bored pile according to claim 1, characterized in that: The mounting plate (4) is horizontally slidably connected to the positioning claw (2), and a buffer spring (46) is connected between the mounting plate (4) and the positioning claw (2).

3. A construction method for hoisting and lowering the reinforcing cage of a bored pile, wherein the construction is carried out using the hoisting and lowering device for the reinforcing cage of a bored pile as described in any one of claims 1-2, characterized in that: The crane vertically lifts the steel reinforcement cage and transports it to the pile hole; The base is installed at the pile hole, and the positioning hole is coaxial and directly opposite to the pile hole; The reinforcing cage passes through the positioning hole; The motor starts, and the positioning claws clamp and fix the side wall of the steel cage. The crane lowered the steel cage into the pile hole.

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