A hoisting device and hoisting method for precast square pile construction

Abstract

The present application relates to precast square pile hoisting technology field, especially to a kind of hoisting device and hoisting method for precast square pile construction, including installation box and lifting ring, the lifting ring is arranged at the top of installation box, the hoisting device further includes two symmetrical slide plates being arranged below installation box, double-shaft motor for controlling the movement of two slide plates towards or opposite and respectively setting the clamping plate at the bottom of each slide plate.The output shaft rotation of double-shaft motor can drive two clamping plates to move towards each other, clamping plate can clamp precast square pile, then hoist precast square pile, hoist precast square pile to specified position, construction, the entire precast square pile is clamped by clamping plate, ensure the stability of precast square pile during lifting, reduce the risk of collision and friction, so as to avoid damage to precast square pile.

Description

Technical Field

[0001] This invention relates to the field of precast square pile hoisting technology, and in particular to a hoisting device and hoisting method for precast square pile construction. Background Technology

[0002] Precast square piles are a type of basic building material widely used in construction projects, especially in bridges, docks, and high-rise buildings. During construction, hoisting is generally required to ensure the safe removal of the precast square piles from the transport vehicle and their accurate installation in the designated location.

[0003] Current hoisting methods typically involve securing the precast square pile to one side with a hook or tying it with ropes. This unilateral force application can cause the precast square pile to tilt or rotate during hoisting, increasing the risk of collisions with other objects and resulting in wear or damage to its surface. Furthermore, the unstable posture of the precast square pile during hoisting makes it prone to collisions and friction with other components or surrounding objects, which can damage not only the surface of the precast square pile but also its internal structure, reducing its overall quality and service life. Summary of the Invention

[0004] To address the problems existing in the background technology, the present invention provides a hoisting device and hoisting method for the construction of precast square piles. It can overcome the disadvantages of unilateral force application, which can cause the precast square piles to tilt or rotate during the hoisting process, increasing the risk of collision between the precast square piles and other objects, thereby causing wear or damage to the surface of the precast square piles. Moreover, during the hoisting process, it is easy to collide and rub against other components or surrounding objects, which can not only damage the surface of the precast square piles, but also affect their internal structure, reducing the overall quality and service life.

[0005] To achieve the above-mentioned technical objectives, the present invention provides a hoisting device for precast square pile construction, comprising a mounting box and a lifting ring. The lifting ring is disposed on the top of the mounting box. The hoisting device further includes two sliding plates symmetrically disposed below the mounting box, a dual-axis motor for controlling the two sliding plates to move in opposite directions, and clamping plates disposed at the bottom of each sliding plate. The dual-axis motor is installed inside the mounting box, and each output shaft of the dual-axis motor is connected to a lead screw via a coupling. Each lead screw is rotatably connected to the mounting box, and the threads on the two lead screws are opposite. The two sliding plates are threadedly connected to the two lead screws respectively. The clamping plates on each side are respectively mounted on the inner side of the bottom of the corresponding sliding plate via a rotating mechanism. The rotating mechanism includes a rotating shaft one, a mounting frame, a rotating shaft two, and a reduction motor. The rotating shaft one is rotatably connected to the corresponding sliding plate and fixedly connected to the corresponding clamping plate. The mounting frame is fixedly installed on the outer side of the corresponding sliding plate. The rotating shaft two is rotatably connected inside the mounting frame. The rotating shaft two and the rotating shaft one on the corresponding side are driven by a worm gear. The reduction motor is mounted on the corresponding sliding plate, and the output shaft of the reduction motor is connected to the rotating shaft two.

[0006] The preferred technical solution of the present invention is as follows: the hoisting device further includes a guide mechanism disposed on each side slide plate, the guide mechanism including slider one and slider two, both slide plates having arc-shaped grooves, the center of each arc-shaped groove coinciding with the rotating shaft one on the corresponding side; slider one and slider two are slidably connected in the corresponding side groove, and each side slider one and slider two are connected to the corresponding side clamping plate.

[0007] A preferred technical solution of the present invention: The hoisting device further includes a stabilizing mechanism disposed on each side slide plate. The stabilizing mechanism includes a cylinder and an insert plate. The cylinder is mounted on the corresponding side slide plate. An insert plate is connected to the telescopic rod of the cylinder. A slot adapted to the insert plate is opened on each side slide plate 2. The insert plate slides through the slide plate and inserts into the slot on the slide plate 2 to fix the slide plate 2.

[0008] A preferred technical solution of the present invention: a centering mechanism is also provided on each side clamp, the centering mechanism including a connecting block, a connecting shaft, a rotating plate, a horizontal slide rod, a centering plate, a horizontal screw, and a rotating assembly. Connecting blocks are connected to both the left and right sides of the slide plate, connecting shafts are rotatably connected to the connecting blocks, rotating plates are connected to the connecting shafts, horizontal slide rods are slidably connected to the rotating plates, centering plates are connected to the horizontal slide rods, and horizontal screws are threadedly connected to the rotating plates. The horizontal screws and centering plates are rotatably connected, and the rotating assembly is used to control the rotation of the rotating plates to open the centering plate.

[0009] The preferred technical solution of the present invention is as follows: The rotating assembly includes a contact block, a guide rod, a sliding plate, a limiting block, a push block, a connecting plate, and a connecting plate. Contact blocks are connected to the connecting shafts, and torsion springs connect the contact blocks and connecting blocks. Guide rods are connected to both the left and right sides of the mounting bracket, and sliding plates are slidably connected to the guide rods. A limiting block and a push block are connected to the top of each sliding plate. The limiting block contacts the contact block to limit the centering plate. The push block pushes the contact block, causing it to rotate. The contact block drives the rotating plate to rotate, opening the centering plate. Two connecting plates are connected to each insert plate, and a connecting plate is hinged to the top of each connecting plate. The connecting plate and the sliding plate are hinged together.

[0010] The preferred technical solution of the present invention is as follows: two sets of limiting mechanisms are provided on each side clamping plate. The two sets of limiting mechanisms on the same clamping plate are respectively set at both ends of the top of the clamping plate. Each set of limiting mechanisms includes a limiting plate, a vertical screw and two vertical slide rods. The two vertical slide rods are slidably connected to the top of the clamping plate. The limiting plate is connected to the top of the vertical slide rods. The vertical screw is located between the two vertical slide rods and is threadedly connected to the top surface of the clamping plate. The vertical screw is rotatably connected to the limiting plate.

[0011] The preferred technical solution of the present invention is as follows: an indicator mechanism is provided on the front and rear end faces of each side clamp plate. The indicator mechanism includes a scale and an indicator block. The scale is vertically fixed on the end face of the clamp plate. An indicator block is connected to each limiting plate and the indicator block points to the scale.

[0012] The present invention also provides a method for hoisting a hoisting device for precast square pile construction, comprising the following steps:

[0013] S1: Hang the hook on the lifting ring, and then lift the device to the periphery of the precast square pile, so that the precast square pile is located between the two sliding plates;

[0014] S2: Controls the output shaft of the dual-axis motor to rotate, which drives the lead screw to rotate. The lead screw drives the two clamping plates to move closer to each other, and the clamping plates can clamp the precast square pile.

[0015] S3: The extension rod of the control cylinder extends, causing the two insert plates to move away from each other. The insert plates move out of the slots on slider two, releasing slider two and allowing the clamping plate to rotate.

[0016] S4: Control the output shaft of the geared motor to rotate, which drives the clamping plate to rotate. The clamping plate drives the precast square pile to rotate, rotating the precast square pile to a vertical position. Then, the precast square pile is hoisted to the designated position for construction.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] (1) The present invention can drive two clamping plates to move closer to each other by rotating the output shaft of the dual-axis motor. The clamping plates can clamp the precast square pile, then lift the precast square pile, and then lift the precast square pile to the designated position for construction. By clamping the entire precast square pile with the clamping plates, the stability of the precast square pile during the lifting process is ensured, the risk of collision and friction is reduced, and thus damage to the precast square pile can be avoided.

[0019] (2) The present invention can fix the second slider by inserting a plate, thereby improving the stability of the clamping plate, preventing the clamping plate from tilting, and reducing the weight borne by the worm gear and reducing the wear of the worm gear.

[0020] (3) The present invention can push the precast square pile through the centering plate, center the precast square pile, avoid the extra lateral force caused by the shift of the center of gravity, and thus avoid the precast square pile from tilting during hoisting. Attached Figure Description

[0021] Figure 1 A three-dimensional structural schematic diagram of the present invention is shown.

[0022] Figure 2 A three-dimensional structural schematic diagram of the dual-axis motor, lead screw, rotating shaft, and clamping plate of the present invention is shown.

[0023] Figure 3 A three-dimensional structural schematic diagram of the mounting bracket, rotating shaft 2, and geared motor of the present invention is shown.

[0024] Figure 4 A three-dimensional structural schematic diagram of the guiding mechanism of the present invention is shown.

[0025] Figure 5 A three-dimensional structural schematic diagram of the stabilizing mechanism of the present invention is shown.

[0026] Figure 6 A schematic diagram of a second three-dimensional structure of the stabilizing mechanism of the present invention is shown.

[0027] Figure 7 A three-dimensional structural schematic diagram of the centering mechanism of the present invention is shown.

[0028] Figure 8 A three-dimensional structural schematic diagram of the rotating component of the present invention is shown.

[0029] Figure 9 A three-dimensional structural schematic diagram of the limiting mechanism of the present invention is shown.

[0030] Figure 10 A three-dimensional structural schematic diagram of the indicating mechanism of the present invention is shown.

[0031] The markings in the diagram are as follows: 1-Mounting box, 2-Lifting ring, 3-Dual-axis motor, 4-Screw rod, 5-Slide plate, 6-Shaft 1, 7-Clamping plate, 8-Mounting bracket, 9-Shaft 2, 10-Gear motor, 111-Slide groove, 112-Slider 1, 113-Slider 2, 121-Cylinder, 122-Insertion plate, 131-Connecting block, 132-Connecting shaft, 133-Rotating plate, 134-Horizontal slide rod, 135-Centering plate, 136-Horizontal screw rod, 141-Contact block, 142-Guide rod, 143-Sliding plate, 144-Limiting block, 145-Push block, 146-Connecting plate, 147-Connecting plate, 151-Vertical slide rod, 152-Limiting plate, 153-Vertical screw rod, 161-Scale, 162-Indicator block. Detailed Implementation

[0032] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0033] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The technical solutions of the present invention will now be clearly and completely described in conjunction with the accompanying drawings. It should be understood that the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0034] An embodiment provides a hoisting device for the construction of precast square piles, referring to... Figures 1-3 The system includes a mounting box 1, lifting rings 2, a dual-shaft motor 3, lead screws 4, sliding plates 5, clamping plates 7, and a rotating mechanism. Lifting rings 2 are symmetrically connected to the top left and right sides of the mounting box 1. A dual-shaft motor 3 is bolted to the top center of the mounting box 1. Lead screws 4 are connected to the output shafts of the dual-shaft motor 3 via couplings, allowing the lead screws 4 and mounting box 1 to rotate. Sliding plates 5 are slidably connected to the front and rear sides of the mounting box 1, with the lead screws 4 and sliding plates 5 connected by threads. Clamping plates 7 are mounted on the sliding plates 5 via the rotating mechanism. The sides of the two clamping plates 7 that are close to each other have cushioning material to prevent direct contact and wear on the precast square piles. The rotating mechanism includes… The slide plate 5 is equipped with a rotating shaft 6, a mounting bracket 8, a rotating shaft 9, and a geared motor 10. The rotating shaft 6 is rotatably connected to the middle of the lower part of the slide plate 5. The two rotating shafts 6 are fixedly connected to the two clamping plates 7 respectively. The mounting bracket 8 is bolted to the side of the two slide plates 5 that is far apart from each other. The rotating shaft 9 is rotatably connected to the upper part of the mounting bracket 8. The rotating shaft 9 and the rotating shaft 6 are driven by a worm gear. The worm gear has a self-locking function, which can prevent the rotating shaft 6 and the clamping plate 7 from rotating, ensuring the stability of the clamping plate 7. The geared motor 10 is bolted to the side of the two slide plates 5 that is far apart from each other. The output shaft of the geared motor 10 is connected to the rotating shaft 9 by a coupling.

[0035] Reference Figure 4 It also includes a guiding mechanism, which includes slider 112 and slider 213. Each of the two slide plates 5 has a groove 111 on the side that is close to each other. Sliding slider 112 and two sliders 213 are slidably connected in the groove 111. Sliding slider 112 and slider 213 are both connected to the clamping plate 7.

[0036] Reference Figure 5 and Figure 6 It also includes a stabilizing mechanism, which includes a cylinder 121 and a plate 122. A set of cylinders 121 is bolted to the side of each of the two sliding plates 5 that are far apart from each other. Each set has two cylinders 121. The telescopic rods on the two cylinders 121 in the same set are connected to the plate 122. The second slider 113 has slots that are adapted to the plate 122. The plate 122 slides through the sliding plate 5 and is located in the slot on the second slider 113.

[0037] The worker hangs the hook on the lifting ring 2, then hoists the device to the periphery of the precast square pile, positioning it between the two sliding plates 5. The insert plate 122 is inserted into the slot on the second slider 113, fixing the second slider 113 in place. This improves the stability of the clamping plate 7, preventing it from tilting and reducing the weight on the worm gear, thus minimizing wear. The output shaft of the dual-axis motor 3 is then rotated, driving the lead screw 4. The lead screw 4 moves the two sliding plates 5 closer together, which in turn moves the two clamping plates 7 closer together, clamping the precast square pile. The precast square pile is then lifted, and the extension rod of the cylinder 121 is extended, causing the two insert plates 122 to move further apart. The direction of movement is such that the insert plate 122 moves out of the slot on the slider 113, releasing the slider 113 and allowing the clamping plate 7 to rotate. Then, the operator controls the output shaft of the reduction motor 10 to rotate, driving the rotating shaft 9 to rotate. The rotating shaft 9 drives the rotating shaft 6 to rotate through the worm gear, which in turn drives the clamping plate 7 to rotate. The clamping plate 7 then drives the precast square pile to rotate, rotating it to a vertical position. The sliders 112 and 113 can guide the clamping plate 7, improving its stability during rotation. The precast square pile is then hoisted to the designated position for construction. The clamping plate 7 holds the entire precast square pile in place, ensuring its stability during hoisting and reducing the risk of collisions and friction, thus preventing damage to the precast square pile.

[0038] Reference Figure 7 and Figure 8 It also includes a centering mechanism, which includes a connecting block 131, a connecting shaft 132, a rotating plate 133, a horizontal slide bar 134, a centering plate 135, a horizontal screw 136, and a rotating assembly. The lower left and right sides of the slide plate 5 are connected to the connecting block 131, and the connecting shaft 132 is rotatably connected to the connecting block 131. The rotating shaft 132 is connected to the rotating plate 133, and two horizontal slide bars 134 are slidably connected to the rotating plate 133. The two horizontal slide bars 134 on the same rotating plate 133 are connected to the centering plate 135. The lower parts of the centering plates 135 on the left and right sides are inclined in a direction away from each other. The rotating plate 133 is connected to the horizontal screw 136 by a thread. The horizontal screw 136 and the centering plate 135 are rotatably connected. The rotating assembly is used to control the rotation of the rotating plate 133 to rotate the centering plate 135 away.

[0039] Reference Figure 8The rotating assembly includes a contact block 141, a guide rod 142, a sliding plate 143, a limiting block 144, a push block 145, a connecting plate 146, and a connecting plate 147. The upper end of the connecting shaft 132 is connected to the contact block 141, and a torsion spring is connected between the contact block 141 and the connecting block 131. The left and right sides of the mounting bracket 8 are connected to the guide rod 142, and the sliding plate 143 is slidably connected to the guide rod 142. The top of the sliding plate 143 is connected to the limiting block 144, which contacts the contact block 141. The top of the sliding plate 143 is connected to the push block 145. The two insert plates 122 are bolted to the opposite sides of each other and connected to the two connecting plates 146. The top of the connecting plate 146 is hinged to the connecting plate 147, and the connecting plate 147 is hinged to the sliding plate 143.

[0040] Workers can rotate the horizontal screw 136 to move the centering plate 135. Then, adjusting the distance between the left and right centering plates 135 according to the length of the precast square pile, the device is hoisted to the periphery of the precast square pile. The inclined portion of the centering plate 135 will contact the left and right sides of the precast square pile, pushing it to center it and preventing additional lateral forces caused by a shift in the center of gravity. This prevents the precast square pile from tilting during hoisting. The limiting block 144 can block the contact block 141, thus limiting the position of the centering plate 135 and preventing it from shifting. When the telescopic rod of the cylinder 121 extends, causing the two insert plates 122 to move away from each other, the connecting plates 146 on the front and rear sides will also move away from each other. The connecting plate 146 is pulled by the connecting plate 147, which in turn moves the sliding plates 143 on both sides closer to each other. The sliding plates 143 move the limiting blocks 144 on both sides closer to each other, and the limiting blocks 144 and the contact blocks 141 are disengaged. The sliding plates 143 can also move the pushing blocks 145 on both sides closer to each other. The pushing blocks 145 push the contact blocks 141, causing the contact blocks 141 to rotate. The torsion spring is deformed, and the contact blocks 141 drive the connecting shaft 132 to rotate. The connecting shaft 132 drives the rotating plate 133 to rotate, which in turn drives the centering plate 135 to rotate, opening the centering plate 135 and disengaging it from the precast square pile, ensuring that the precast square pile can rotate normally.

[0041] Reference Figure 9 It also includes a limiting mechanism, which includes a vertical slide rod 151, a limiting plate 152 and a vertical screw 153. A set of vertical slide rods 151 are slidably connected to the top left and right sides of the clamping plate 7. Each set has two vertical slide rods 151. The two vertical slide rods 151 in the same set are connected to the limiting plate 152. The top left and right sides of the clamping plate 7 are threadedly connected to the vertical screw 153. The vertical screw 153 and the limiting plate 152 are rotatably connected.

[0042] Reference Figure 10 It also includes an indicator mechanism, which includes a scale 161 and an indicator block 162. The scale 161 is connected to both sides of the clamp 7, and the indicator block 162 is connected to both sides of the limit plate 152. The indicator block 162 points to the scale 161.

[0043] Workers can rotate the vertical screw 153 to move the limiting plate 152 up and down. The height of the limiting plate 152 can be adjusted according to the height of the precast square pile. The indicator block 162 points to the scale 161, and the height of the limiting plate 152 can be known through the scale 161 so that the limiting plate 152 can be accurately adjusted to the appropriate height. Then, the device is hoisted to the periphery of the precast square pile. The limiting plate 152 contacts the top of the precast square pile, and the limiting plate 152 stops moving downward, so that the clamping plate 7 can clamp the precast square pile in the middle.

[0044] The present invention also provides a method for hoisting a hoisting device for precast square pile construction, comprising the following steps:

[0045] S1: Hang the hook on the lifting ring 2, and then lift the device to the periphery of the precast square pile, so that the precast square pile is located between the two sliding plates 5;

[0046] S2: Controls the output shaft of the dual-axis motor 3 to rotate, which drives the lead screw 4 to rotate. The lead screw 4 drives the two clamping plates 7 to move closer to each other, and the clamping plates 7 can clamp the precast square pile.

[0047] S3: The extension rod of the control cylinder 121 extends, causing the two insert plates 122 to move away from each other. The insert plates 122 move out of the slots on the slider 113, releasing the slider 113 and allowing the clamping plate 7 to rotate.

[0048] S4: Control the output shaft of the reduction motor 10 to rotate, drive the clamping plate 7 to rotate, and the clamping plate 7 drives the precast square pile to rotate, rotate the precast square pile to a vertical state, and then hoist the precast square pile to the designated position for construction.

[0049] Obviously, the embodiments described above are only some embodiments of the present invention, and not all embodiments. They only express the preferred implementation of the present invention and are described in a relatively specific and detailed manner, but should not be construed as limiting the scope of the present invention.

[0050] It should be noted that, for those skilled in the art, various modifications, additions or subtractions, improvements and substitutions can be made without departing from the concept of the present invention. Therefore, based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A hoisting device for precast square pile construction, comprising an installation box (1) and a lifting ring (2), wherein the lifting ring (2) is disposed on the top of the installation box (1), characterized in that: The hoisting device also includes two sliding plates (5) symmetrically arranged below the mounting box (1), a dual-axis motor (3) for controlling the two sliding plates (5) to move in opposite directions, and clamping plates (7) respectively arranged at the bottom of each sliding plate (5). The dual-axis motor (3) is installed inside the mounting box (1). The output shaft of the dual-axis motor (3) is connected to a lead screw (4) through a coupling. Each lead screw (4) is rotatably connected to the mounting box (1). The threads on the two lead screws (4) are opposite. The two sliding plates (5) are threadedly connected to the two lead screws (4) respectively. The clamping plates (7) on each side are respectively installed on the corresponding sliding plates through a rotating mechanism. The rotating mechanism includes a rotating shaft one (6), a mounting frame (8), a rotating shaft two (9), and a geared motor (10) on the inner bottom of the side slide plate (5). The rotating shaft one (6) is rotatably connected to the corresponding side slide plate (5) and fixedly connected to the corresponding clamping plate (7). The mounting frame (8) is fixedly installed on the outer side of the corresponding side slide plate (5). The rotating shaft two (9) is rotatably connected inside the mounting frame (8). The rotating shaft two (9) is driven by the rotating shaft one (6) on the corresponding side through a worm gear. The geared motor (10) is installed on the corresponding side slide plate (5), and the output shaft of the geared motor (10) is connected to the rotating shaft two (9). The hoisting device also includes a guide mechanism set on each side slide plate (5). The guide mechanism includes a slider one (112) and a slider two (113). An arc-shaped groove (111) is opened on both slide plates (5). The center of each arc-shaped groove (111) coincides with the rotating shaft one (6) on the corresponding side. The slider one (112) and slider two (113) are slidably connected in the corresponding side groove (111). 3) Connection with the corresponding side clamp (7): The hoisting device also includes a stabilizing mechanism set on each side slide (5). The stabilizing mechanism includes a cylinder (121) and a plug plate (122). The cylinder (121) is installed on the corresponding side slide (5). The extension rod of the cylinder (121) is connected to the plug plate (122). A slot adapted to the plug plate (122) is opened on each side slide (113). The plug plate (122) slides through the slide (5) and Insert into the slot on slider two (113) to fix slider two (113); each side clamp (7) is also provided with a centering mechanism, the centering mechanism including a connecting block (131), a connecting shaft (132), a rotating plate (133), a horizontal slide rod (134), a centering plate (135), a horizontal screw (136) and a rotating assembly, the left and right sides of the slide plate (5) are connected to the connecting block (131), and the connecting block (131) is rotatably connected to the connecting shaft (132). 132), a rotating plate (133) is connected to the connecting shaft (132), a horizontal slide rod (134) is slidably connected to the rotating plate (133), a centering plate (135) is connected to the horizontal slide rod (134), a horizontal screw (136) is threadedly connected to the rotating plate (133), the horizontal screw (136) and the centering plate (135) are rotatably connected, and the rotating assembly is used to control the rotating plate (133) to rotate and open the centering plate (135); The rotating assembly includes a contact block (141), a guide rod (142), a sliding plate (143), a limiting block (144), a push block (145), a connecting plate (146), and a connecting plate (147). A contact block (141) is connected to each connecting shaft (132). A torsion spring connects the contact block (141) and the connecting block (131). Guide rods (142) are connected to both the left and right sides of the mounting bracket (8). A sliding plate (143) is slidably connected to each guide rod (142). A limiting block (147) is connected to the top of each sliding plate (143). 4) The push block (145), the limiting block (144) and the contact block (141) contact each other to limit the centering plate (135). The push block (145) is used to push the contact block (141) to make the contact block (141) rotate. The contact block (141) drives the rotating plate (133) to rotate and open the centering plate (135). Two connecting plates (146) are connected to the insert plate (122). The top of the connecting plate (146) is hinged to the connecting plate (147). The connecting plate (147) and the sliding plate (143) are hinged together.

2. The hoisting device for precast square pile construction according to claim 1, characterized in that: Two sets of limiting mechanisms are provided on each side clamp (7). The two sets of limiting mechanisms on the same clamp (7) are respectively set at the top ends of the clamp (7). Each set of limiting mechanisms includes a limiting plate (152), a vertical screw (153) and two vertical slide rods (151). The two vertical slide rods (151) are slidably connected to the top of the clamp (7). The limiting plate (152) is connected to the top of the vertical slide rods (151). The vertical screw (153) is located between the two vertical slide rods (151) and is threadedly connected to the top surface of the clamp (7). The vertical screw (153) is rotatably connected to the limiting plate (152).

3. The hoisting device for precast square pile construction according to claim 2, characterized in that: Indicating mechanisms are provided on the front and rear end faces of each side clamp (7). The indicating mechanism includes a scale (161) and an indicating block (162). The scale (161) is vertically fixed on the end face of the clamp (7). An indicating block (162) is connected to each limiting plate (152). The indicating block (162) points to the scale (161).

4. A method for hoisting a hoisting device for precast square pile construction, comprising using the hoisting device for precast square pile construction as described in claim 1, characterized in that... Specifically, the following steps are included: S1. Hang the hook on the lifting ring, and then lift the device to the periphery of the precast square pile, so that the precast square pile is located between the two sliding plates; S2. Control the output shaft of the dual-axis motor to rotate, which drives the lead screw to rotate. The lead screw drives the two clamping plates to move closer to each other, and the clamping plates can clamp the precast square pile. S3. The extension rod of the control cylinder extends, causing the two insert plates to move away from each other. The insert plates move out of the slots on slider two, releasing slider two and allowing the clamping plate to rotate. S4. Control the output shaft of the geared motor to rotate, which drives the clamping plate to rotate. The clamping plate drives the precast square pile to rotate, rotating the precast square pile to a vertical position. Then, the precast square pile is hoisted to the designated position for construction.

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