Hoisting device and hoisting method for prefabricated square pile construction

Abstract

The invention relates to the technical field of prefabricated square pile hoisting, in particular to a hoisting device for prefabricated square pile construction and a hoisting method.The hoisting device comprises a mounting box and a hoisting ring, and the hoisting ring is arranged at the top of the mounting box; the hoisting device further comprises two sliding plates symmetrically arranged below the mounting box, a double-shaft motor used for controlling the two sliding plates to move in the same direction or opposite directions and clamping plates arranged at the bottoms of the sliding plates respectively. The output shaft of the double-shaft motor rotates to drive the two clamping plates to move in the direction close to each other, the clamping plates can clamp a prefabricated square pile, then the prefabricated square pile is hoisted, then the prefabricated square pile is hoisted to a designated position for construction, the whole prefabricated square pile is clamped through the clamping plates, the stability of the prefabricated square pile in the hoisting process is ensured, and the construction efficiency is improved. And the risks of collision and friction are reduced, so that the prefabricated square pile can be prevented from being damaged.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting of precast square piles, and particularly relates to a hoisting device and a hoisting method for precast square pile construction. Background Technique

[0002] Precast square piles are a kind of basic building materials, which are widely used in construction projects, especially in projects such as bridges, wharves, high-rise buildings, etc. During the construction process, it is generally necessary to assist by hoisting to ensure that the precast square piles are safely lifted from the transport vehicle and accurately installed at the designated position.

[0003] The current hoisting method generally only fixes the hook or binds the rope to one side of the precast square pile. The one-sided force method will cause the precast square pile to tilt or rotate during the hoisting process, increasing the risk of collision between the precast square pile and other objects, thereby causing surface wear or damage to the precast square pile. Moreover, the posture of the precast square pile is unstable during the hoisting process, and it is easy to collide and rub with other components or surrounding objects, which will not only damage the surface of the precast square pile, but may also affect its internal structure, reducing the overall quality and service life. Summary of the Invention

[0004] Aiming at the problems existing in the background technique, the present invention provides a hoisting device and a hoisting method for precast square pile construction, which can overcome the disadvantages that the one-sided force method will cause the precast square pile to tilt or rotate during the hoisting process, increasing the risk of collision between the precast square pile and other objects, thereby causing surface wear or damage to the precast square pile, and it is easy to collide and rub with other components or surrounding objects during the hoisting process, which will not only damage the surface of the precast square pile, but may also affect its internal structure, reducing the overall quality and service life.

[0005] To achieve the above technical purpose, the present invention provides a hoisting device for precast square pile construction, including an installation box and a lifting ring. The lifting ring is arranged on the top of the installation box. The hoisting device further includes two sliding plates symmetrically arranged below the installation box, a double-shaft motor for controlling the two sliding plates to move towards or away from each other, and clamping plates respectively arranged at the bottom of each sliding plate. The double-shaft motor is installed in the installation box, and the output shafts of the double-shaft motor are respectively connected with lead screws through couplings. Each side of the lead screw is rotationally connected with the installation box, and the threads on the two lead screws are opposite. The two sliding plates are respectively threadedly connected with the two lead screws; each side of the clamping plate is respectively installed on the inner side of the bottom of the corresponding slider through a rotating mechanism. The rotating mechanism includes a first rotating shaft, a mounting frame, a second rotating shaft and a reduction motor. The first rotating shaft is rotationally connected to the corresponding side of the sliding plate and is fixedly connected with the corresponding clamping plate. The mounting frame is fixedly installed on the outside of the corresponding side of the sliding plate, and the second rotating shaft is rotationally connected in the mounting frame. The second rotating shaft is in worm and gear transmission with the first rotating shaft on the corresponding side. The reduction motor is installed on the corresponding side of the sliding plate, and the output shaft of the reduction motor is connected with the second rotating shaft.

[0006] A preferred technical solution of the present invention: The hoisting device further includes a guiding mechanism provided on each side of the sliding plate. The guiding mechanism includes a first slider and a second slider. Arc-shaped sliding grooves are formed on both sliding plates, and the center of each arc-shaped sliding groove coincides with the corresponding first rotating shaft on the corresponding side; both the first slider and the second slider are slidably connected in the corresponding sliding grooves on their respective sides, and the first slider and the second slider on each side 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 provided on each side of the sliding plate. The stabilizing mechanism includes a cylinder and an insertion plate. The cylinder is installed on the corresponding side of the sliding plate, and the insertion plates are connected to the telescopic rods of the cylinders. Slots adapted to the insertion plates are formed on each side of the second slider; the insertion plates slidably penetrate through the sliding plates and are inserted into the slots on the second slider to fix the second slider.

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

[0009] A preferred technical solution of the present invention: The rotating assembly includes a contact block, a guide rod, a sliding plate, a limiting block, a pushing block, a connecting plate and a connecting rod. Contact blocks are connected to the connecting shafts, a torsion spring is connected between the contact blocks and the connecting blocks. Guide rods are connected to both the left and right sides of the mounting frame, sliding plates are slidably connected to the guide rods, a limiting block and a pushing block are connected to the top of each sliding plate, the limiting block contacts the contact block to limit the centering plate, the pushing block is used to push the contact block to make the contact block rotate, the contact block drives the rotating plate to rotate to turn the centering plate away. Two connecting plates are connected to each insertion plate, connecting rods are hinged to the top of the connecting plates, and the connecting rods are hinged to the sliding plates.

[0010] A preferred technical solution of the present invention: Two groups of limiting mechanisms are provided on each side clamping plate. The two groups of limiting mechanisms on the same clamping plate are respectively arranged at both ends of the top of the clamping plate. Each group of limiting mechanisms includes a limiting plate, a vertical screw rod and two vertical sliding rods. The two vertical sliding rods are slidably connected to the top of the clamping plate, the limiting plate is connected to the top of the vertical sliding rods, the vertical screw rod is located between the two vertical sliding rods, and the vertical screw rod is threadedly connected to the top surface of the clamping plate and rotatably connected to the limiting plate.

[0011] A preferred technical solution of the present invention: indicating mechanisms are respectively provided on the front and rear end faces of each side splint. The indicating mechanism includes a scale and an indicating block. The scale is vertically fixed on the end face of the splint, and indicating blocks are connected to the limiting plates, and the indicating blocks point to the scale.

[0012] The present invention also provides a hoisting method for a hoisting device used in the construction of precast square piles, including 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: Control the output shaft of the double-shaft motor to rotate, drive the lead screw to rotate, and the lead screw drives the two splints to move towards each other, and the splints can clamp the precast square pile;

[0015] S3: Control the telescopic rod of the cylinder to extend, drive the two inserting plates to move away from each other, the inserting plates move out of the slots on the second slider, release the second slider, and enable the splints to rotate;

[0016] S4: Control the output shaft of the reduction motor to rotate, drive the splints to rotate, the splints drive the precast square pile to rotate, rotate the precast square pile to the vertical state, and then hoist the precast square pile to the designated position for construction.

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

[0018] (1) By rotating the output shaft of the double-shaft motor of the present invention, the two splints can be driven to move towards each other. The splints can clamp the precast square pile, then lift the precast square pile, and then hoist the precast square pile to the designated position for construction. The entire precast square pile is clamped by the splints to ensure the stability of the precast square pile during the hoisting process, reduce the risk of collision and friction, and thus avoid damage to the precast square pile.

[0019] (2) The present invention can fix the second slider through the inserting plate, thereby improving the stability of the splint, avoiding the inclination of the splint, and at the same time reducing the gravity borne by the worm and worm gear and reducing the wear of the worm and worm gear.

[0020] (3) The present invention can push the precast square pile through the centering plate to center the precast square pile, avoid the additional lateral force caused by the center of gravity deviation, and thus avoid the inclination of the precast square pile during the hoisting process. Description of the Drawings

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

[0022] Figure 2 Shows the three-dimensional structural schematic diagram of the double-shaft motor, lead screw, first rotating shaft and splint of the present invention.

[0023] Figure 3 Shows a schematic three-dimensional structure diagram of the mounting bracket, the second rotating shaft and the reduction motor of the present invention.

[0024] Figure 4 Shows a schematic three-dimensional structure diagram of the guiding mechanism of the present invention.

[0025] Figure 5 Shows a first schematic three-dimensional structure diagram of the stabilizing mechanism of the present invention.

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

[0027] Figure 7 Shows a schematic three-dimensional structure diagram of the centering mechanism of the present invention.

[0028] Figure 8 Shows a schematic three-dimensional structure diagram of the rotating assembly of the present invention.

[0029] Figure 9 Shows a schematic three-dimensional structure diagram of the limiting mechanism of the present invention.

[0030] Figure 10 Shows a schematic three-dimensional structure diagram of the indicating mechanism of the present invention.

[0031] The marks in the figure are: 1 - mounting box, 2 - lifting ring, 3 - double-shaft motor, 4 - lead screw, 5 - sliding plate, 6 - first rotating shaft, 7 - clamping plate, 8 - mounting bracket, 9 - second rotating shaft, 10 - reduction motor, 111 - chute, 112 - first slider, 113 - second slider, 121 - cylinder, 122 - inserting plate, 131 - connecting block, 132 - connecting shaft, 133 - rotating plate, 134 - horizontal sliding rod, 135 - centering plate, 136 - horizontal screw rod, 141 - contact block, 142 - guide rod, 143 - sliding plate, 144 - limiting block, 145 - pushing block, 146 - connecting plate, 147 - connecting board, 151 - vertical sliding rod, 152 - limiting plate, 153 - vertical screw rod, 161 - scale, 162 - indicating block. Detailed implementation manners

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0033] In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance. The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. It should be noted that the technical features involved in 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] A hoisting device for precast square pile construction provided by an embodiment, referring to Figures 1 - 3 , includes an installation box 1, lifting rings 2, a biaxial motor 3, lead screws 4, sliding plates 5, clamping plates 7, and a rotating mechanism. Lifting rings 2 are symmetrically connected to the front and back on both left and right sides of the top of the installation box 1. A biaxial motor 3 is installed in the middle of the inner top of the installation box 1 by bolts. Lead screws 4 are connected to the output shafts of the biaxial motor 3 through couplings. The lead screws 4 rotate with the installation box 1. The front and back sides inside the installation box 1 are both slidably connected with sliding plates 5. The lead screws 4 are threadedly connected to the sliding plates 5. Clamping plates 7 are installed on the sliding plates 5 through the rotating mechanism. Buffer materials are provided on the sides of the two clamping plates 7 that are close to each other to avoid wear of the precast square pile caused by direct contact. The rotating mechanism includes a first rotating shaft 6, an installation frame 8, a second rotating shaft 9, and a reduction motor 10. The middle parts of the lower parts of the sliding plates 5 are rotatably connected with the first rotating shaft 6. The two first rotating shafts 6 are respectively fixed to the two clamping plates 7. Installation frames 8 are connected to the sides of the two sliding plates 5 that are far from each other by bolts. The upper parts inside the installation frames 8 are rotatably connected with the second rotating shaft 9. The second rotating shaft 9 and the first rotating shaft 6 are driven by a worm and worm gear. The worm and worm gear has a self-locking function, which can prevent the first rotating shaft 6 and the clamping plate 7 from rotating and ensure the stability of the clamping plate 7. Reduction motors 10 are installed on the sides of the two sliding plates 5 that are far from each other by bolts. The output shafts of the reduction motors 10 are connected to the second rotating shaft 9 through couplings.

[0035] Referring to Figure 4 , it further includes a guiding mechanism. The guiding mechanism includes a first slider 112 and a second slider 113. Chute 111 is opened on the side of the two sliding plates 5 that are close to each other. A first slider 112 and two second sliders 113 are slidably connected in the chute 111. The first slider 112 and the second slider 113 are both connected to the clamping plate 7.

[0036] Referring to Figure 5 and Figure 6 , it further includes a stabilizing mechanism. The stabilizing mechanism includes a cylinder 121 and an insertion plate 122. A group of cylinders 121 are installed on the sides of the two sliding plates 5 that are far from each other by bolts. There are two cylinders 121 in each group. The telescopic rods on the two cylinders 121 in the same group are jointly connected with the insertion plate 122. Slots adapted to the insertion plate 122 are opened on the second sliders 113. The insertion plate 122 slidably penetrates through the sliding plate 5 and is located in the slots on the second sliders 113.

[0037] The staff hangs the lifting hook on the lifting ring 2, and then hoists this device to the periphery of the precast square pile, making the precast square pile located between two sliding plates 5. The inserting plate 122 is inserted into the slot on the second slider 113 to fix the second slider 113, thereby improving the stability of the clamping plate 7, avoiding the inclination of the clamping plate 7, and at the same time being able to reduce the gravity borne by the worm and worm gear and reduce the wear of the worm and worm gear. Then, control the rotation of the output shaft of the double-shaft motor 3 to drive the screw rod 4 to rotate. The screw rod 4 drives the two sliding plates 5 to move towards each other. The sliding plates 5 drive the two clamping plates 7 to move towards each other. The clamping plates 7 can clamp the precast square pile, and then hoist the precast square pile. Then, control the telescopic rod of the air cylinder 121 to extend, driving the two inserting plates 122 to move away from each other. The inserting plates 122 move out of the slots on the second slider 113 to release the second slider 113, enabling the clamping plate 7 to rotate. Subsequently, the staff controls the rotation of the output shaft of the reduction motor 10 to drive the second rotating shaft 9 to rotate. The second rotating shaft 9 drives the first rotating shaft 6 to rotate through the worm and worm gear. The first rotating shaft 6 drives the clamping plate 7 to rotate, and the clamping plate 7 drives the precast square pile to rotate to a vertical state. The first slider 112 and the second slider 113 can guide the clamping plate 7 to improve the stability of the clamping plate 7 during rotation. Then, hoist the precast square pile to the designated position for construction. Clamp the entire precast square pile with the clamping plate 7 to ensure the stability of the precast square pile during the hoisting process and reduce the risk of collision and friction, thereby being able to avoid damage to the precast square pile.

[0038] Refer to Figure 7 and Figure 8 Also included is a centering mechanism. The centering mechanism includes a connecting block 131, a connecting shaft 132, a rotating plate 133, a horizontal sliding rod 134, a centering plate 135, a horizontal screw rod 136, and a rotating assembly. Connecting blocks 131 are connected to the left and right sides of the lower part of the sliding plate 5. Connecting shafts 132 are rotatably connected to the connecting blocks 131. Rotating plates 133 are connected to the connecting shafts 132. Two horizontal sliding rods 134 are slidably connected to the rotating plates 133. A centering plate 135 is commonly connected to the two horizontal sliding rods 134 on the same rotating plate 133. The lower parts of the centering plates 135 on the left and right sides incline away from each other. Horizontal screw rods 136 are threadedly connected to the rotating plates 133. The horizontal screw rods 136 are rotatably connected to the centering plates 135. The rotating assembly is used to control the rotation of the rotating plate 133 to turn away the centering plate 135.

[0039] Refer to Figure 8, the rotating assembly includes a contact block 141, a guide rod 142, a sliding plate 143, a limiting block 144, a pushing block 145, a connecting plate 146 and a connecting rod 147. Contact blocks 141 are connected to the upper ends of the connecting shafts 132. A torsion spring is connected between the contact block 141 and the connecting block 131. Guide rods 142 are connected to the left and right sides of the mounting bracket 8. Sliding plates 143 are slidably connected to the guide rods 142. Limiting blocks 144 are connected to the tops of the sliding plates 143. The limiting blocks 144 are in contact with the contact blocks 141. Pushing blocks 145 are connected to the tops of the sliding plates 143. Two connecting plates 146 are bolted to the mutually remote sides of the two inserting plates 122. Connecting rods 147 are hinged to the tops of the connecting plates 146. The connecting rods 147 are hingedly connected to the sliding plates 143.

[0040] The worker can rotate the horizontal screw rod 136 to drive the centering plate 135 to move, and then adjust the distance between the centering plates 135 on the left and right according to the length of the precast square pile. Then, the device is lifted to the periphery of the precast square pile. The inclined parts of the centering plates 135 will contact the left and right sides of the precast square pile and push the precast square pile to center it, avoiding the additional lateral force caused by the center of gravity offset, so as to avoid the inclination of the precast square pile during hoisting. The limiting block 144 can block the contact block 141 to limit the centering plate 135 and prevent the position of the centering plate 135 from shifting. When the telescopic rod of the air cylinder 121 extends to move the two inserting plates 122 in the mutually remote direction, the front and rear connecting plates 146 will also move in the mutually remote direction. The connecting plates 146 are pulled by the connecting rods 147. The connecting rods 147 drive the sliding plates 143 on the left and right to move in the mutually approaching direction. The sliding plates 143 drive the limiting blocks 144 on the left and right to move in the mutually approaching direction. The limiting blocks 144 are separated from the contact blocks 141. The sliding plates 143 can also drive the pushing blocks 145 on the left and right to move in the mutually approaching direction. The pushing blocks 145 will push the contact blocks 141 to make the contact blocks 141 rotate, the torsion spring deforms, the contact blocks 141 drive the connecting shafts 132 to rotate, and the connecting shafts 132 drive the rotating plate 133 to rotate, thereby driving the centering plate 135 to rotate and turning the centering plate 135 away from the precast square pile to ensure that the precast square pile can rotate normally.

[0041] Refer to Figure 9 , it further includes a limiting mechanism. The limiting mechanism includes a vertical sliding rod 151, a limiting plate 152 and a vertical screw rod 153. A set of vertical sliding rods 151 are slidably connected to the left and right sides of the top of the clamping plate 7. There are two vertical sliding rods 151 in each set. A limiting plate 152 is connected to the two vertical sliding rods 151 in the same group. Vertical screw rods 153 are threadedly connected to the left and right sides of the top of the clamping plate 7. The vertical screw rods 153 are rotatably connected to the limiting plate 152.

[0042] Refer toFigure 10 It further includes an indicating mechanism, which includes a scale 161 and an indicating block 162. The scale 161 is connected to both the left and right sides of the clamping plate 7, and the indicating block 162 is connected to the limiting plate 152. The indicating block 162 points to the scale 161.

[0043] The staff can rotate the vertical screw 153 to drive the limiting plate 152 to move up and down, and can adjust the height of the limiting plate 152 according to the height of the precast square pile. The indicating block 162 points to the scale 161, and the height of the limiting plate 152 can be understood through the scale 161, so as to accurately adjust the limiting plate 152 to an 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 hoisting method for a hoisting device for precast square pile construction, including the following steps:

[0045] S1: Hang the hook on the lifting ring 2, and then hoist 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: Control the output shaft of the dual-axis motor 3 to rotate, drive the lead screw 4 to rotate, and the lead screw 4 drives the two clamping plates 7 to move towards each other, and the clamping plates 7 can clamp the precast square pile;

[0047] S3: Control the telescopic rod of the cylinder 121 to extend, drive the two inserting plates 122 to move away from each other, the inserting plates 122 are removed from the slots on the slider two 113, and the slider two 113 is released, so that the clamping plate 7 can rotate;

[0048] S4: Control the output shaft of the reduction motor 10 to rotate, drive the clamping plate 7 to rotate, 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 a part of the embodiments of the present invention, rather than all embodiments. It only expresses the preferred embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the patent of the present invention.

[0050] It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations, quantity increases or decreases, improvements and substitutions can be made. Therefore, based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

Claims

1. A hoisting device for prefabricated square pile construction, comprising an installation box (1) and a hoisting ring (2), wherein the hoisting ring (2) is arranged on the top of the installation box (1), characterized in that: The hoisting device also includes two slide plates (5) symmetrically arranged below the installation box (1), a double-axis motor (3) for controlling the two slide plates (5) to move toward or away from each other, and a clamping plate (7) respectively arranged at the bottom of each slide plate (5), wherein the double-axis motor (3) is installed in the installation box (1), and the output shaft of the double-axis motor (3) is connected to a screw rod (4) through a coupling, and the screw rod (4) on each side is rotationally connected to the installation box (1), and the threads on the two screw rods (4) are opposite, and the two slide plates (5) are respectively threadedly connected to the two screw rods (4); the clamping plates (7) on each side are respectively installed on the corresponding screw rods (4) through a rotating mechanism. On the inner side of the bottom of the side slider (5), the rotating mechanism comprises a rotating shaft 1 (6), a mounting frame (8), a rotating shaft 2 (9) and a reduction motor (10); the rotating shaft 1 (6) is rotatably connected to the corresponding side slider (5) and fixedly connected to the corresponding clamping plate (7); the mounting frame (8) is fixedly mounted on the outer side of the corresponding side slider (5); the rotating shaft 2 (9) is rotatably connected inside the mounting frame (8); the rotating shaft 2 (9) and the rotating shaft 1 (6) on the corresponding side are driven by a worm gear; the reduction motor (10) is mounted on the corresponding side slider (5), and the output shaft of the reduction motor (10) is connected to the rotating shaft 2 (9).

2. A hoisting device for prefabricated square pile construction according to claim 1, characterized in that: The lifting device also includes a guide mechanism arranged on the slide plate (5) on each side, and the guide mechanism includes a slider 1 (112) and a slider 2 (113). The two slide plates (5) are both provided with an arc-shaped slide groove (111), and the center of each arc-shaped slide groove (111) coincides with the rotating shaft 1 (6) on the corresponding side; the slider 1 (112) and the slider 2 (113) are both slidably connected in the corresponding side slide groove (111), and the slider 1 (112) and the slider 2 (113) on each side are connected to the corresponding side clamping plate (7).

3. A hoisting device for prefabricated square pile construction according to claim 2, characterized in that: The hoisting device also includes a stabilizing mechanism arranged on each side slide (5), the stabilizing mechanism including a cylinder (121) and a plug plate (122), the cylinder (121) is installed on the corresponding side slide (5), the plug plate (122) is connected to the telescopic rod of the cylinder (121), and a slot adapted to the plug plate (122) is opened on the slider (113) on each side; the plug plate (122) slides through the slide (5) and is inserted into the slot on the slider (113) to fix the slider (113).

4. A hoisting device for prefabricated square pile construction according to claim 3, characterized in that: A centering mechanism is also provided on each side clamping plate (7), and the centering mechanism comprises a connecting block (131), a connecting shaft (132), a rotating plate (133), a horizontal sliding 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 with connecting blocks (131), the connecting blocks (131) are rotatably connected with connecting shafts (132), the connecting shafts (132) are connected with rotating plates (133), the rotating plates (133) are slidably connected with horizontal sliding rods (134), the horizontal sliding rods (134) are connected with centering plates (135), the rotating plates (133) are threadedly connected with horizontal screws (136), the horizontal screws (136) and the centering plate (135) are rotatably connected, and the rotating assembly is used to control the rotating plate (133) to rotate and turn the centering plate (135) away.

5. A hoisting device for prefabricated square pile construction according to claim 4, characterized in that: The rotating assembly comprises a contact block (141), a guide rod (142), a sliding plate (143), a limit block (144), a push block (145), a connecting plate (146) and a connecting plate (147); the contact block (141) is connected to the connecting shaft (132); a torsion spring is connected between the contact block (141) and the connecting block (131); the left and right sides of the mounting frame (8) are connected to the guide rod (142); the sliding plate (143) is slidably connected to the guide rod (142); the top of the sliding plate (143) is connected to the limit block (141); 4) and the push block (145), the limit block (144) and the contact block (141) are in contact 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 the centering plate (135) is turned away, the plug plate (122) is connected with two connecting plates (146), the top of the connecting plate (146) is hinged with a connecting plate (147), and the connecting plate (147) and the sliding plate (143) are hingedly connected.

6. A hoisting device for prefabricated square pile construction according to claim 5, characterized in that: Two sets of limiting mechanisms are arranged on each side clamping plate (7), and the two sets of limiting mechanisms on the same clamping plate (7) are respectively arranged at two ends of the top of the clamping plate (7), and each set of limiting mechanisms comprises a limiting plate (152), a vertical screw rod (153) and two vertical sliding rods (151), the two vertical sliding rods (151) are slidably connected to the top of the clamping plate (7), the limiting plate (152) is connected to the top of the vertical sliding rod (151), the vertical screw rod (153) is located between the two vertical sliding rods (151), and the vertical screw rod (153) is threadedly connected to the top surface of the clamping plate (7), and the vertical screw rod (153) is rotatably connected to the limiting plate (152).

7. A hoisting device for prefabricated square pile construction according to claim 6, characterized in that: An indicating mechanism is provided on the front and rear end surfaces of each side clamp (7), respectively, the indicating mechanism comprising a scale (161) and an indicating block (162), the scale (161) is vertically fixed on the end surface of the clamp (7), the limiting plate (152) is connected with the indicating block (162), and the indicating block (162) points to the scale (161).

8. A method for hoisting a prefabricated square pile using a hoisting device for construction, using the hoisting device for construction of prefabricated square piles according to claim 3 for hoisting, characterized in that: The specific steps include: S1. Hang the hook on the lifting ring, and then hang the device to the periphery of the prefabricated square pile so that the prefabricated square pile is located between the two slide plates; S2. Control the output shaft of the dual-axis motor to rotate, drive the screw to rotate, and the screw drives the two clamps to move towards each other, so that the clamps can clamp the prefabricated square piles; S3. The telescopic rod of the control cylinder is extended, driving the two plugs to move away from each other, the plug is removed from the slot on the slider 2, and the slider 2 is released so that the splint can rotate; S4. Control the output shaft of the reduction motor to rotate, drive the clamp to rotate, and the clamp drives the prefabricated square pile to rotate, rotate the prefabricated square pile to a vertical state, and then hoist the prefabricated square pile to a designated location for construction.

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