Hoisting and dragging device for PHC pipe pile construction site

Abstract

The utility model discloses a lifting and dragging device for a PHC tubular pile construction site, which comprises a lifting and dragging device body matched with a PHC tubular pile, the lifting and dragging device body comprises a cross rod, a lifting ring is arranged above the cross rod, connecting parts fixedly welded with the top of the cross rod are integrally arranged on two sides of the bottom of the lifting ring, and the connecting parts are connected with the top of the cross rod. And two transverse driving and transverse guiding assemblies are mounted on the transverse rod. According to the utility model, a series of structures are arranged, so that the PHC pipe piles can be conveniently lifted and unloaded on site, and when transverse deviation or horizontal inclination deviation occurs when the PHC pipe piles are lifted to a stacking position, the PHC pipe piles can be automatically transversely moved and rotationally adjusted to be aligned and stacked in a remote control manner; the phenomenon that labor-consuming dragging and rotary adjustment are needed by workers due to final horizontal inclination deviation or transverse deviation during hoisting is avoided, time and labor are saved, safety risks existing in manual dragging and adjustment are avoided, and hoisting and stacking convenience and safety are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of PHC pipe pile lifting, in particular to a lifting and dragging device for a PHC pipe pile construction site. Background Art

[0002] PHC prefabricated pipe piles are transported from the pipe pile factory and unloaded on site for stacking. The stacking site must be flat, with a maximum of three layers. According to the pile utilization plan, the first-used piles should be placed on top to avoid disturbing the pile pile. There is often no centralized stacking area within the construction site. Piles brought into the site are stacked near the pile positions within the construction area. During construction, according to the progress of the pile sinking, close contact with the manufacturer is maintained to ensure the construction progress is met.

[0003] Existing pipe piles are unloaded by cranes, and the pipe piles are unloaded by the two-end hook lifting method; the horizontal angle of the hook should not be less than 60 degrees, the lifting process should be kept stable, and no collision should occur; the existing method of unloading and lifting PHC prefabricated pipe piles by the two-end hook lifting method can lift them smoothly, but there are still the following deficiencies in use; 1. When lifting to the stacking position, it is inevitable that the piles will not be aligned with the lower pipe piles or will be horizontally tilted and offset when they are finally lowered. Manual adjustment of the position and angle by pushing, pulling, and rotating displacement is required to align and stack the piles. The manual dragging and adjustment method is time-consuming and labor-intensive, and there are greater safety risks. The convenience and safety of use are not ideal; in view of this, the present application proposes a lifting and dragging device for the PHC pipe pile construction site to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a hoisting and dragging device for a PHC pipe pile construction site to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a lifting and dragging device for a PHC pipe pile construction site, comprising a lifting and dragging device body that cooperates with the PHC pipe pile, the lifting and dragging device body comprising a crossbar, a lifting ring being provided above the crossbar, and connecting portions welded and fixed to the top of the crossbar being integrally provided on both sides of the bottom of the lifting ring, the provided lifting ring being used to connect to a hook of an external lifting device and to be lifted and displaced by the hook;

[0006] Two transverse drive and transverse guide assemblies are installed on the transverse bar, and the bottom of the transverse drive and transverse guide assembly is fixedly connected with a connecting ring, and a steel wire rope is fixedly installed on the connecting ring, and a circular ring is fixedly installed on the bottom end of the steel wire rope, and an L-shaped hook is welded and fixed to the bottom of the circular ring. The two L-shaped hooks are symmetrically arranged and respectively clamped to the inner sides of both ends of the PHC pipe pile. The transverse drive and transverse guide assembly is used to drive the steel wire rope and the L-shaped hook to move laterally through the corresponding connecting ring, and the spacing between the two L-shaped hooks can be appropriately adjusted according to PHC pipe piles of different lengths. When the PHC pipe piles are unloaded from the transport vehicle at the construction site, when they are hoisted to the stacking position, the position of the PHC pipe pile can be appropriately dragged and adjusted by transverse movement, so that it is convenient to stack it neatly with the PHC pipe piles below, saving the phenomenon of laborious dragging and adjustment required by personnel due to the final deviation during hoisting;

[0007] A vertical guide lifting assembly is installed in the middle of the bottom of the cross bar, and the bottom end of the vertical guide lifting assembly is fixedly connected to a circular seat. A rotary drive assembly is installed between the top inner wall and the bottom inner wall of the circular seat. The bottom end of the rotary drive assembly extends to the bottom of the circular seat and is fixedly connected to a U-shaped clamping plate. The vertical guide lifting assembly is used to drive the circular seat to move up and down, and the rotary drive assembly is used to drive the U-shaped clamping plate to clamp downward on the outside of the PHC pipe pile when the circular seat moves downward, and is used to drive the PHC pipe pile to rotate and adjust the alignment through the U-shaped clamping plate when it is horizontally tilted with other PHC pipe piles in the stacking position, thereby saving the phenomenon of personnel needing to drag and rotate due to the final horizontal tilt deviation during hanging.

[0008] Preferably, the transverse drive and transverse guide assembly includes a rectangular sliding sleeve that is slidably mounted on the outside of the transverse bar, the bottom of the rectangular sliding sleeve is welded and fixed to the top of the corresponding connecting ring, and electric slide rails are embedded and fixed on both sides of the bottom of the transverse bar, and the bottom of the moving end of the electric slide rail is fixedly connected to the bottom inner wall of the corresponding rectangular sliding sleeve.

[0009] Preferably, the vertical guide lifting assembly includes a multi-stage electric telescopic rod fixedly connected to the middle of the bottom of the cross bar, the protruding end of the multi-stage electric telescopic rod is fixedly connected to the top of the round-shaped seat, and two vertical guide tubes are embedded and fixed at the bottom of the cross bar. The vertical guide tubes are slidingly sleeved with vertical guide rods, and the bottom ends of the two vertical guide rods are fixedly connected to the top of the round-shaped seat.

[0010] Preferably, the rotary drive assembly includes a rotating shaft rotatably installed between the top inner wall and the bottom inner wall of the circular seat, the outer fixed sleeve of the rotating shaft is provided with a large gear, and a small gear is engaged with the right side of the large gear. A brake motor with an output shaft fixedly installed on the top inner wall of the circular seat and fixedly connected to the top of the small gear, the bottom end of the rotating shaft extends to the bottom of the circular seat and is fixedly connected to the top of the U-shaped clamping plate.

[0011] Preferably, a battery is embedded and fixed in the middle of the top of the cross bar, the electric slide rail, the multi-stage electric telescopic rod and the brake motor are all electrically connected to the battery, the front side of the multi-stage electric telescopic rod, the front side of the two electric slide rails and the rear side of the brake motor are all fixed and electrically connected to wireless remote control switches, the four wireless remote control switches are all electrically connected to the battery, and the four wireless remote control switches are matched with the same external remote control.

[0012] Preferably, an L-shaped rubber pad is bonded and fixed to the inner side of the L-shaped hook, and the top inner wall of the L-shaped rubber pad is in movable contact with the top inner wall of the PHC pile.

[0013] Preferably, the multi-stage electric telescopic rod is located between two rectangular sliding sleeves.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. This hoisting and dragging device for PHC pipe pile construction sites is suitable for hoisting and unloading PHC pipe piles on site through the cooperation of the provided crossbar, lifting ring, cross-drive and cross-guide components, connecting ring, wire rope, round ring and L-shaped hook. In addition, when lateral deviation occurs when hoisting to the stacking position, the PHC pipe piles can be automatically adjusted laterally by remote control to align and stack the piles, eliminating the need for manual dragging and adjustment. This saves time and effort, avoids the safety risks of manual dragging and adjustment, and improves the convenience and safety of hoisting and stacking.

[0016] 2. This lifting and dragging device for PHC pipe pile construction sites cooperates with the provided crossbar, lifting ring, vertical guide lifting assembly, rotary drive assembly, return seat and U-shaped clamping plate. When the PHC pipe pile is horizontally tilted with other PHC pipe piles at the stacking position, it can automatically and quickly perform rotation adjustment and alignment work by remote control. This saves the laborious dragging and rotation adjustment required by personnel due to the final horizontal tilt deviation during lifting and placement, saves time and effort, avoids the safety risks of manual dragging and adjustment, and improves the convenience and safety of lifting and stacking.

[0017] The utility model is provided with a series of structures, which facilitates the lifting and unloading of PHC pipe piles on site, and when lateral deviation or horizontal tilt deviation occurs when the PHC pipe piles are lifted to the stacking position, the PHC pipe piles can be automatically moved laterally and rotated to align and stack them by remote control, eliminating the need for personnel to drag and rotate the piles laboriously due to the final horizontal tilt deviation or lateral deviation during lifting, saving time and effort, avoiding the safety risks of manual dragging and adjustment, and improving the convenience and safety of lifting and stacking. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1This is a schematic diagram of the three-dimensional structure of a lifting and dragging device for a PHC pipe pile construction site proposed by the present invention;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure viewed from above;

[0020] Figure 3 This is a schematic diagram of the main cross-sectional structure of a lifting and dragging device for a PHC pipe pile construction site proposed by the present invention;

[0021] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A in FIG.

[0022] In the figure: 1. Horizontal bar; 101. Lifting ring; 2. Rectangular sleeve; 3. Electric slide rail; 4. Connecting ring; 5. Steel wire rope; 6. Circular ring; 7. L-shaped hook; 8. Vertical guide tube; 9. Vertical guide rod; 10. Reciprocating seat; 11. Multi-stage electric telescopic rod; 12. Rotating shaft; 13. Large gear; 14. Small gear; 15. Brake motor; 16. U-shaped pallet; 17. Battery. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] like Figures 1 to 4 As shown, the embodiment of the present invention provides a lifting and dragging device for a PHC pile construction site, including a lifting and dragging device body that cooperates with the PHC pile. The lifting and dragging device body includes a crossbar 1, and a lifting ring 101 is provided above the crossbar 1. Both sides of the bottom of the lifting ring 101 are integrally provided with a connection portion welded to the top of the crossbar 1. The provided lifting ring 101 is used to connect to the hook of an external lifting device and be lifted and displaced by it.

[0025] Two transverse drive and transverse guide assemblies are installed on the transverse bar 1. The bottom of the transverse drive and transverse guide assembly is fixedly connected with a connecting ring 4. A steel wire rope 5 is fixedly installed on the connecting ring 4. The bottom end of the steel wire rope 5 is fixedly installed with a circular ring 6. An L-shaped hook 7 is welded and fixed to the bottom of the circular ring 6. The two L-shaped hooks 7 are symmetrically arranged and respectively clamped to the inner sides of the two ends of the PHC pile. An L-shaped rubber pad is bonded and fixed to the inner side of the L-shaped hook 7. The top inner wall of the L-shaped rubber pad is in active contact with the top inner wall of the PHC pile. The transverse drive and transverse guide assembly is used to drive the steel wire rope 5 and the L-shaped hook through the corresponding connecting ring 4. 7 lateral displacement, can be used to properly adjust the distance between the two L-shaped hooks 7 according to the different lengths of PHC piles. When the PHC piles are unloaded from the transport vehicle at the construction site and hoisted to the stacking position, the position of the PHC piles can be properly dragged and adjusted by using the lateral displacement, so that they can be stacked neatly with the PHC piles below, saving the laborious dragging and adjustment required by personnel due to the final deviation during hoisting. The provided L-shaped rubber pad plays a flexible insulation effect between the inner side of the corresponding L-shaped hook 7 and the PHC pile, reducing the hard wear phenomenon during hoisting.

[0026] A vertical guide lifting assembly is installed in the middle of the bottom of the cross bar 1, and the bottom end of the vertical guide lifting assembly is fixedly connected to the circular seat 10. A rotary drive assembly is installed between the top inner wall and the bottom inner wall of the circular seat 10, and the bottom end of the rotary drive assembly extends to the bottom of the circular seat 10 and is fixedly connected to a U-shaped clamping plate 16. The vertical guide lifting assembly is used to drive the circular seat 10 to move up and down, and the rotary drive assembly is used to drive the U-shaped clamping plate 16 to clamp downward on the outside of the PHC pipe pile when the circular seat 10 moves downward, and is used to drive the PHC pipe pile to rotate and adjust the alignment through the U-shaped clamping plate 16 when it is horizontally tilted with other PHC pipe piles in the stacking position, saving the phenomenon that personnel need to drag and rotate due to the final horizontal tilt deviation during hanging.

[0027] Specifically, the transverse drive and transverse guide assembly includes a rectangular sleeve 2 that is slidably mounted on the outside of the transverse bar 1. The bottom of the rectangular sleeve 2 is welded and fixed to the top of the corresponding connecting ring 4. Electric slide rails 3 are embedded and fixed on both sides of the bottom of the transverse bar 1, wherein embedding grooves are provided on both sides of the bottom of the transverse bar 1. The electric slide rails 3 are fixedly connected to the top inner walls of the corresponding embedding grooves, which has the effect of embedding and fixing the electric slide rails 3 without convexity. The bottom of the moving end of the electric slide rail 3 is fixedly connected to the bottom inner wall of the corresponding rectangular sleeve 2; the rectangular sleeve 2 and the electric slide rail 3 are coordinated, and the electric slide rail 3 is used to drive the corresponding rectangular sleeve 2 to move horizontally, and the rectangular sleeve 2 is used to realize the lateral displacement adjustment of the wire rope 5 and the L-shaped hook 7 driven by the corresponding connecting ring 4.

[0028] Furthermore, the vertical guide lifting assembly includes a multi-stage electric telescopic rod 11 fixedly connected to the middle of the bottom of the cross bar 1, the multi-stage electric telescopic rod 11 is located between the two rectangular sliding sleeves 2, the protruding end of the multi-stage electric telescopic rod 11 is fixedly connected to the top of the round-shaped seat 10, and two vertical guide tubes 8 are embedded and fixed at the bottom of the cross bar 1, wherein the bottom of the cross bar 1 is provided with two embedded through-holes which are respectively welded and fixed to the outer sides of the corresponding vertical guide tubes 8, and the sliding sleeve inside the vertical guide tube 8 is provided with a vertical guide rod 9, and the bottom ends of the two vertical guide rods 9 are fixedly connected to the top of the round-shaped seat 10; the multi-stage electric telescopic rod 11, the vertical guide tube 8 and the vertical guide rod 9 are coordinated, and the multi-stage electric telescopic rod 11 is used to drive the round-shaped seat 10 to move up and down, and the vertical guide rod 9 is used to slide up and down in the corresponding vertical guide tube 8 to realize vertical guidance of the round-shaped seat 10.

[0029] Furthermore, the rotary drive assembly includes a rotating shaft 12 rotatably mounted between the top inner wall and the bottom inner wall of the circular seat 10, wherein a circular through-hole is opened on the bottom inner wall of the circular seat 10, and bearings are fixedly mounted in the circular through-hole and on the top inner wall of the circular seat 10, and the inner ring of the bearing is fixedly sleeved on the outer side of the rotating shaft 12, which has the effect of rotatably mounting the rotating shaft 12, and a large gear 13 is fixedly sleeved on the outer side of the rotating shaft 12, and a small gear 14 is meshed with the right side of the large gear 13, and a brake motor 15 is fixedly mounted on the top inner wall of the circular seat 10 with an output shaft and a fixed connection with the top of the small gear 14, and the bottom end of the rotating shaft 12 extends to the bottom of the circular seat 10 and is fixedly connected to the top of the U-shaped clamping plate 16; The rotating shaft 12, large gear 13, small gear 14 and brake motor 15 cooperate. After the U-shaped clamping plate 16 is clamped downward on the outside of the PHC pipe pile, when the PHC pipe pile has a horizontal tilt deviation with the PHC pipe piles stacked below, the brake motor 15 is used to drive the small gear 14 to rotate. The small gear 14 drives the rotating shaft 12 to rotate through the large gear 13 meshing with it, and the rotating shaft 12 drives the U-shaped clamping plate 16 to rotate. The rotating U-shaped clamping plate 16 is used to drive the PHC pipe pile to rotate and adjust the alignment when it is horizontally tilted with other PHC pipe piles in the stacking position, so as to facilitate labor-saving and neat stacking work, and save the phenomenon that personnel need to laboriously drag and rotate due to the final horizontal tilt deviation during hanging.

[0030] Furthermore, a battery 17 is embedded and fixed in the middle of the top of the cross bar 1, and the electric slide rail 3, the multi-stage electric telescopic rod 11 and the brake motor 15 are all electrically connected to the battery 17. The front side of the multi-stage electric telescopic rod 11, the front side of the two electric slide rails 3 and the rear side of the brake motor 15 are all fixed and electrically connected with wireless remote control switches. The four wireless remote control switches are all electrically connected to the battery 17. The four wireless remote control switches are matched with the same external remote control. The set external remote control is used for personnel to remotely open and close the electric slide rail 3, the multi-stage electric telescopic rod 11 and the brake motor 15.

[0031] The method of using this embodiment is as follows: the lifting ring 101 is connected to the hook of the external lifting equipment, which is driven to lift and displace. When the PHC piles transported to the site are unloaded and stacked, the personnel use the external remote control to start the two electric slide rails 3. The two electric slide rails 3 drive the two rectangular sliding sleeves 2 to slide close to or repel each other on the cross bar 1. The two rectangular sliding sleeves 2 drive the two steel wire ropes 5 and the two L-shaped hooks 7 to repel or move close to each other through the two connecting rings 4. The spacing between the two steel wire ropes 5 and the two L-shaped hooks 7 can be flexibly adjusted. After the adjustment is appropriate, the two L-shaped hooks 7 are respectively inserted into the inner sides of the two ends of the PHC pile, and the device is lifted and displaced by using the external lifting equipment to realize the lifting of the PHC pile.

[0032] When the pile is lifted to the stacking location on site and lowered, if there is a lateral deviation between the lifted PHC pile and the PHC pile already stacked below and needs to be aligned, the personnel can use the external remote control to control the two electric slide rails 3 to drive the two rectangular sliding sleeves 2 to move in the same direction. At this time, the two rectangular sliding sleeves 2 drive the PHC pile to move laterally through the two connecting rings 4, the two steel wire ropes 5 and the two L-shaped hooks 7 in turn to adjust the alignment. After the adjustment is aligned, the PHC pile can be lowered for stacking. After stacking, the two L-shaped hooks 7 are removed from the ends of the PHC pile to carry out the lifting of the next PHC pile. By remotely controlling the automatic lateral movement adjustment of the PHC pile when a lateral deviation occurs during lifting to the stacking location, it is convenient to stack it neatly with the PHC pile below, and there is no need for manual dragging and adjustment, which saves the need for personnel to drag and adjust due to the final deviation during lifting and laying, saves time and effort, avoids the safety risks of manual dragging and adjustment, and improves the convenience and safety of lifting and stacking.

[0033] When the PHC pile is hoisted to the on-site stacking location for lowering, if there is a horizontal tilt deviation between the hoisted PHC pile and the PHC piles already stacked below and needs to be aligned, the personnel use the external remote control to control the multi-stage electric telescopic rod 11 to start forward, so that it drives the return seat 10 to move downward, and the return seat 10 drives the two vertical guide rods 9 to slide downward in the corresponding vertical guide tubes 8. At the same time, the return seat 10 drives the U-shaped clamping plate 16 to clamp downward on the PHC pile through the rotating shaft 12. At this time, the personnel use the external remote control to control the brake motor 15 to start, so that it drives the small gear 14 to rotate, and the small gear 14 rotates through the rotation axis 12. The meshed large gear 13 drives the rotating shaft 12 to rotate, and the rotating shaft 12 drives the U-shaped clamping plate 16 to rotate. The U-shaped clamping plate 16 collapses and drives the PHC pipe pile inside it to rotate horizontally for rotation adjustment. After adjustment and alignment, the stacking work can be carried out, so that when the PHC pipe pile is horizontally tilted with other PHC pipe piles in the stacking position, the rotation adjustment and alignment work can be automatically and quickly performed by remote control, which saves the phenomenon that personnel need to drag and rotate due to the final horizontal tilt deviation during lifting, saves time and effort, avoids the safety risks of manual dragging and adjustment, and improves the convenience and safety of lifting and stacking.

[0034] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A lifting and dragging device for PHC pile construction sites, comprising a lifting and dragging device body that cooperates with the PHC piles, characterized in that: The lifting and dragging device body comprises a crossbar (1), a lifting ring (101) is provided above the crossbar (1), and both sides of the bottom of the lifting ring (101) are integrally provided with connecting parts that are welded and fixed to the top of the crossbar (1); Two transverse drive and transverse guide assemblies are installed on the transverse rod (1), a connecting ring (4) is fixedly connected to the bottom of the transverse drive and transverse guide assembly, a steel wire rope (5) is fixedly installed on the connecting ring (4), a circular ring (6) is fixedly installed at the bottom end of the steel wire rope (5), an L-shaped hook (7) is welded and fixed to the bottom of the circular ring (6), and the two L-shaped hooks (7) are symmetrically arranged and respectively clamped to the inner sides of the two ends of the PHC pipe pile; A vertical guide lifting assembly is installed in the middle of the bottom of the crossbar (1), the bottom end of the vertical guide lifting assembly is fixedly connected to a circular seat (10), a rotary drive assembly is installed between the top inner wall and the bottom inner wall of the circular seat (10), and the bottom end of the rotary drive assembly extends to the bottom of the circular seat (10) and is fixedly connected to a U-shaped clamping plate (16).

2. The hoisting and dragging device for PHC pile construction site according to claim 1, characterized in that: The transverse drive and transverse guide assembly comprises a rectangular sliding sleeve (2) which is slidably mounted on the outside of the transverse bar (1); the bottom of the rectangular sliding sleeve (2) is welded and fixed to the top of the corresponding connecting ring (4); electric slide rails (3) are embedded and fixed on both sides of the bottom of the transverse bar (1); the bottom of the moving end of the electric slide rail (3) is fixedly connected to the bottom inner wall of the corresponding rectangular sliding sleeve (2).

3. The hoisting and dragging device for PHC pile construction site according to claim 2, characterized in that: The vertical guide lifting assembly comprises a multi-stage electric telescopic rod (11) fixedly connected to the middle of the bottom of the crossbar (1), the extended end of the multi-stage electric telescopic rod (11) is fixedly connected to the top of the round-shaped seat (10), two vertical guide tubes (8) are embedded and fixed at the bottom of the crossbar (1), and a vertical guide rod (9) is provided in a sliding sleeve inside the vertical guide tube (8), and the bottom ends of the two vertical guide rods (9) are fixedly connected to the top of the round-shaped seat (10).

4. The hoisting and dragging device for PHC pile construction site according to claim 3, characterized in that: The rotary drive assembly comprises a rotating shaft (12) rotatably mounted between the top inner wall and the bottom inner wall of the reciprocating seat (10); a large gear (13) is fixedly sleeved on the outer side of the rotating shaft (12); a small gear (14) is meshed on the right side of the large gear (13); a brake motor (15) whose output shaft is fixedly connected to the top of the small gear (14) is fixedly mounted on the top inner wall of the reciprocating seat (10); and the bottom end of the rotating shaft (12) extends to the bottom of the reciprocating seat (10) and is fixedly connected to the top of the U-shaped clamping plate (16).

5. The hoisting and dragging device for PHC pile construction site according to claim 4, characterized in that: A battery (17) is embedded and fixed in the middle of the top of the crossbar (1); the electric slide rail (3), the multi-stage electric telescopic rod (11) and the brake motor (15) are all electrically connected to the battery (17); the front side of the multi-stage electric telescopic rod (11), the front sides of the two electric slide rails (3) and the rear side of the brake motor (15) are all fixed and electrically connected to wireless remote control switches; the four wireless remote control switches are all electrically connected to the battery (17); and the four wireless remote control switches are matched with the same external remote control.

6. The hoisting and dragging device for PHC pile construction site according to claim 1, characterized in that: An L-shaped rubber pad is bonded and fixed to the inner side of the L-shaped hook (7), and the top inner wall of the L-shaped rubber pad is in active contact with the top inner wall of the PHC pipe pile.

7. The hoisting and dragging device for PHC pile construction site according to claim 3, characterized in that: The multi-stage electric telescopic rod (11) is located between two rectangular sliding sleeves (2).

Images