A pile extraction device for civil engineering

Abstract

The present invention relates to the technical field of civil engineering construction equipment, and discloses a pile pulling device for civil engineering, including an installation box, a hydraulic power station and a pile body, a sealing top plate is fixedly installed on the top of the installation box by bolts, and a hoisting frame is welded on the top of the sealing top plate, and a drilling and tapping mechanism for drilling and tapping the pile body is arranged on the installation box, and the drilling and tapping mechanism includes a group of central drill rods and a plurality of auxiliary connecting drill rods. The pile pulling device for civil engineering is hoisted to the top of the pile body by a hoisting device, and the device is clamped at the end of the pile body for positioning by a position locking mechanism, and the central drill rod and the auxiliary connecting drill rod are driven to rotate by a hydraulic motor, and the installation box is driven to move downward as a whole by a height adjustment mechanism, and the central drill rod and the auxiliary connecting drill rod are drilled into the top of the pile body, and a threaded connection with the pile body is achieved by a tapping section, so as to provide a force point for pulling the pile body.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering construction equipment, in particular to a pile pulling device for civil engineering. Background Art

[0002] Engineering piles are piles used in engineering construction, which are ultimately subjected to stress in buildings and structures. Non-permanent engineering piles need to be pulled out after the project is completed. For large engineering piles, the soil on the side walls of the pile body is usually separated, and there are generally two types: dry and wet. The dry method uses a full-rotation drill to dig out the soil on the side walls of the pile body, and the wet method mixes the soil on the side walls of the pipe body into mud and pumps it out. However, for small engineering piles, the above method is more expensive. Small engineering piles generally use linear mechanisms, such as hydraulic cylinders. After the hydraulic cylinder drives the clamping mechanism to fix the pile body, the hydraulic cylinder and the clamping mechanism are driven by the lifting equipment to move and slowly pull the pile body upwards. This structure uses a hydraulic cylinder to drive a clamping mechanism to clamp and fix the pile body. The center axis of the hydraulic cylinder is perpendicular to the center axis of the pile body. When the pile body is pulled upward, the piston rod in the hydraulic cylinder is subjected to a large force in the radial direction. Long-term use can easily cause the piston rod to bend and easily damage the sealing of the connection between the piston rod and the cylinder barrel. In addition, it uses a hydraulic cylinder to drive a clamping mechanism to clamp the pile body. The clamping mechanism mainly relies on the friction force generated by the pressure to pull out the pile body. When the soil at the pile body is severely compacted, the friction force alone is not enough to pull out the pile body, which can easily cause slippage between the pile body clamping mechanisms. Summary of the invention

[0003] The object of the present invention is to provide a pile pulling device for civil engineering to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a pile pulling device for civil engineering, comprising an installation box, a hydraulic power station and a pile body, a sealing top plate is fixedly installed on the top of the installation box by bolts, and a hanging frame is welded on the top of the sealing top plate, a drilling and tapping mechanism for drilling and tapping the pile body is arranged on the installation box, the drilling and tapping mechanism comprises a group of central drill rods and a plurality of auxiliary connecting drill rods, the central drill rod and the plurality of auxiliary connecting drill rods are controlled in linkage, and the central drill rod and the auxiliary connecting drill rods are both provided with drilling sections and tapping sections from bottom to top The mounting box is provided with a position locking mechanism for clamping the pile body on the outside, and a height adjusting mechanism is provided on the peripheral side of the mounting box, and the height adjusting mechanism cooperates with the position locking mechanism to drive the mounting box to move upward or downward inside the position locking mechanism, and the hydraulic power station is connected with the drilling and tapping mechanism, the position locking mechanism and the height adjusting mechanism through a hydraulic hose, and the hydraulic power station can provide power to the drilling and tapping mechanism, the position locking mechanism and the height adjusting mechanism and can control the working states of the drilling and tapping mechanism, the position locking mechanism and the height adjusting mechanism.

[0005] As a further solution of the present invention: the drilling and tapping mechanism also includes a transmission gear, the central drill rod and a plurality of auxiliary connecting drill rods are movably installed at the bottom end of the installation box, and the plurality of auxiliary connecting drill rods are distributed around the circumference of the central drill rod, and the top ends of the central drill rod and the auxiliary connecting drill rods are fixedly mounted with a transmission gear located inside the installation box, and the central drill rod and the auxiliary connecting drill rod can be rotated to drill holes at the top of the pile body and perform tapping operations simultaneously, so that the central drill rod and the auxiliary connecting drill rod can be threadedly connected to the top of the pile body through the tapping section, providing a force point for pulling the pile body.

[0006] As a further solution of the present invention: the transmission gears at the top of the central drill rod and the auxiliary connecting drill rod are meshed with each other, the tapping section and the drilling section on the outside of the central drill rod and the auxiliary connecting drill rod are counter-rotating, the central drill rod and the auxiliary connecting drill rod rotate in opposite directions, and the tapping section and the drilling section are counter-rotating to each other, ensuring that the pile body can be drilled and tapped when the central drill rod and the auxiliary connecting drill rod rotate synchronously.

[0007] As a further solution of the present invention: the drilling and tapping mechanism also includes a hydraulic motor, a plug-in rod and a plug-in slot. The hydraulic motor is fixedly installed on the top of the sealing top plate. A plug-in rod is arranged on the output shaft of the hydraulic motor. The top of the center drill rod is provided with a plug-in slot matching with the plug-in rod. The axial cross-section of the plug-in rod is hexagonal. The hydraulic motor is connected to the hydraulic power station through a hydraulic hose. The plug-in rod can be plugged into the plug-in slot to realize the transmission between the center drill rod and the hydraulic motor, and at the same time, it is convenient to disassemble and assemble the hydraulic motor through the sealing top plate.

[0008] As a further solution of the present invention: the position locking mechanism includes two groups of connecting arms, a hydraulic cylinder and a positioning chuck, the two groups of connecting arms are mirror-imaged and distributed on the outside of the installation box, and the ends of the two groups of connecting arms are fixedly installed with hydraulic cylinders, the output shafts of the hydraulic cylinders are fixedly installed with positioning chucks, the oil inlets of the two groups of hydraulic cylinders are fixedly connected with main oil inlet pipes, and the oil return ports are fixedly connected with main oil return pipes, the main oil inlet pipes and the main oil return pipes are connected to the hydraulic power station through hydraulic hoses, and the positioning chucks on the output shafts are driven by the two groups of hydraulic cylinders to move and clamp the pile body, and the device is locked on the pile body to ensure that the pile body can be drilled and tapped when the movable center drill rod and the auxiliary connecting drill rod of the installation box are moved.

[0009] As a further solution of the present invention: the position locking mechanism also includes a guide rail and a guide groove, the guide rail is fixedly installed on the installation box, and the connecting arm is provided with a guide groove cooperating with the guide rail on the side close to the installation box. The installation box is restricted by the cooperation of the guide rail and the guide groove to ensure the stability of the installation box when moving inside the position locking mechanism.

[0010] As a further solution of the present invention: the height adjustment mechanism includes a driving sprocket, a transmission chain, an adjusting screw and a hydraulic motor 2. The number of the driving sprockets is four, and the driving sprockets are movably installed on the installation box. The driving sprockets are mirror-imaged on both sides of the two connecting arms in groups of two. The transmission chain is meshingly sleeved on the outside of the driving sprocket. The hydraulic motor 2 is fixedly installed on the top of the sealing top plate, and the output shaft of the hydraulic motor 2 is fixedly connected to any driving sprocket. The bottom ends of the four groups of driving sprockets are fixedly connected with adjusting screws, and the adjusting screws are threadedly connected to the connecting arms. The hydraulic motor 2 is connected to the hydraulic power station through a hydraulic hose, and power is provided by the hydraulic motor 2, and the power is transmitted through the driving sprocket and the transmission chain. The hydraulic motor 2 can drive the four groups of adjusting screws to rotate synchronously, providing power for the movement of the installation box at multiple positions.

[0011] As a further solution of the present invention: the height adjustment mechanism also includes a plurality of positioning sprockets and a plurality of positioning pulleys, the positioning sprockets and the positioning pulleys are movably mounted on the circumferential side of the mounting box, the transmission chain is meshedly sleeved on the outside of the positioning sprocket, the positioning pulley is clamped on the outside of the transmission chain, and the transmission chain is restricted by the positioning pulley to prevent the transmission chain from falling off along the outside of the driving sprocket when the transmission chain runs horizontally.

[0012] As a further solution of the present invention: the positioning pulleys are evenly distributed around the installation box, and the radial cross-section of the positioning pulley is an "I" shape. The positioning pulley is clamped on the outside of the transmission chain to limit the transmission chain and ensure the stability of the transmission chain during horizontal operation.

[0013] As a further solution of the present invention: the hydraulic power station includes but is not limited to a hydraulic pump, a hydraulic control valve, and a hydraulic container. The length of the hydraulic hose is adapted to the height to which the pile body needs to be pulled out, ensuring that when the pile body is pulled, power can be stably transmitted to hydraulic motor one, hydraulic motor two, and the hydraulic cylinder through the hydraulic hose.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The pile pulling device for civil engineering is hoisted to the top of the pile body by hoisting equipment, and is clamped at the end of the pile body for positioning by a position locking mechanism. The central drill rod and the auxiliary connecting drill rod are driven to rotate by a hydraulic motor, and the installation box is driven to move downward as a whole by a height adjustment mechanism. The central drill rod and the auxiliary connecting drill rod are drilled into the top of the pile body, and threaded connection with the pile body is achieved through the tapping section to provide a force point for pulling the pile body. The central drill rod and several auxiliary connecting drill rods cooperate with each other to pull the pile body at multiple locations to avoid slipping. At the same time, when the central drill rod and the auxiliary connecting drill rod pull the pile body, the force direction corresponds to the movement direction to avoid damage to the central drill rod and the auxiliary connecting drill rod due to long-term use.

[0016] 2. In the pile pulling device for civil engineering, the central drill rod and several auxiliary connecting drill rods in the drilling and tapping mechanism are driven by transmission gears. When the hydraulic motor drives the central drill rod to rotate, it can synchronously drive several auxiliary connecting drill rods to rotate, thereby realizing linkage control of multiple drill rods, realizing synchronous connection of multiple drill rods with the pile body, improving the degree of automation, and at the same time, there is no need to install multiple driving devices, reducing construction costs. In addition, the drill rod is provided with a drilling section and a tapping section, which can realize continuous drilling and tapping, further improving the construction speed.

[0017] 3. The pile pulling device for civil engineering, when the drill rod rotates, drives several hydraulic motors to rotate synchronously through hydraulic motor 2, which can drive the installation box to move downward, provide downward pressure for the drill rod, and facilitate rapid drilling and tapping. At the same time, through several driving sprockets and transmission chains, hydraulic motor 2 can drive several adjusting screws to rotate synchronously, provide power for the movement of the installation box at multiple positions, ensure the stability of the installation box and the drill rod during movement, thereby ensuring that the drill rod can be drilled vertically into the pile body, and then ensure that the drill rod moves in the same direction as the force direction when the pile body is pulled out later, avoiding damage to the drill rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure after the overall combination of the present invention;

[0019] Figure 2 It is a schematic diagram of the installation positions of the drilling and tapping mechanism, the position locking mechanism and the height adjustment mechanism in the present invention;

[0020] Figure 3 It is a schematic diagram of the structure inside the installation box of the present invention;

[0021] Figure 4 It is a structural schematic diagram of the positions of the central drill rod and the auxiliary connecting drill rod in the present invention;

[0022] Figure 5 It is a structural schematic diagram of the top and bottom of the sealing top plate in the present invention;

[0023] Figure 6 It is a structural schematic diagram of the center drill rod in the present invention;

[0024] Figure 7 It is a structural schematic diagram of the height adjustment mechanism in the present invention;

[0025] Figure 8 It is a structural schematic diagram of the position locking mechanism in the present invention;

[0026] Fig. 9 It is a schematic diagram of the structure of the exterior of the position connecting arm in the present invention.

[0027] In the figure: 1. installation box; 2. sealing top plate; 3. lifting frame; 4. drilling and tapping mechanism; 41. center drill rod; 42. auxiliary connecting drill rod; 43. transmission gear; 44. hydraulic motor one; 45. plug-in rod; 46. plug-in slot; 47. tapping section; 48. drilling section; 5. position locking mechanism; 51. connecting arm; 52. hydraulic cylinder; 53. positioning chuck; 54. main oil inlet pipe; 55. main oil return pipe; 56. guide slide rail; 57. guide slide groove; 6. height adjustment mechanism; 61. driving sprocket; 62. positioning sprocket; 63. transmission chain; 64. adjusting screw; 65. positioning pulley; 66. hydraulic motor two; 7. hydraulic power station; 8. pile body. DETAILED DESCRIPTION

[0028] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-9In an embodiment of the present invention, a pile pulling device for civil engineering includes an installation box 1, a hydraulic power station 7 and a pile body 8. A sealing top plate 2 is fixedly installed on the top of the installation box 1 by bolts, and a hanging frame 3 is welded on the top of the sealing top plate 2. A drilling and tapping mechanism 4 for drilling and tapping the pile body 8 is provided on the installation box 1. The drilling and tapping mechanism 4 includes a group of central drill rods 41 and a plurality of auxiliary connecting drill rods 42. A position locking mechanism 5 clamps the device at the end of the pile body 8 for positioning. The central drill rod 41 and the auxiliary connecting drill rod 42 are driven to rotate by a hydraulic motor 44, and the installation box 1 is driven by a height adjustment mechanism 6. The whole is moved downward, and the central drill rod 41 and the auxiliary connecting drill rod 42 are drilled into the top of the pile body 8, and the threaded connection with the pile body 8 is realized through the tapping section 47, which provides a force point for pulling the pile body 8. The central drill rod 41 and the plurality of auxiliary connecting drill rods 42 are controlled in linkage. When the hydraulic motor 44 drives the central drill rod 41 to rotate, the plurality of auxiliary connecting drill rods 42 can be driven to rotate synchronously, thereby realizing linkage control of the plurality of drill rods, realizing synchronous connection of the plurality of drill rods with the pile body 8, and improving the degree of automation. The central drill rod 41 and the auxiliary connecting drill rod 42 are provided with a drilling section 48 and a tapping section 47 from bottom to top, which can realize continuous drilling and tapping. The installation box 1 is provided with a position locking mechanism 5 for clamping the pile body 8 on the outside, and a height adjustment mechanism 6 is provided on the peripheral side of the installation box 1. The height adjustment mechanism 6 cooperates with the position locking mechanism 5 to drive the installation box 1 to move upward or downward inside the position locking mechanism 5. The hydraulic motor 2 66 drives a plurality of hydraulic motors 2 66 to rotate synchronously, which can drive the installation box 1 to move downward, provide downward pressure for the drill rod, and facilitate rapid drilling and tapping. The hydraulic power station 7 is connected to the drilling and tapping mechanism 4, the position locking mechanism 5 and the height adjustment mechanism 6 through a hydraulic hose, and the hydraulic power station 7 can adjust the drilling and tapping pressure. The threading mechanism 4, the position locking mechanism 5 and the height adjustment mechanism 6 provide power and can control the working states of the drilling and tapping mechanism 4, the position locking mechanism 5 and the height adjustment mechanism 6. The drilling and tapping mechanism 4 is controlled by the hydraulic power station 7, and drilling and tapping operations can be performed on the top of the pile body 8. The hydraulic power station 7 controls the height adjustment mechanism 6, which can drive the installation box 1 and the center drill rod 41 and the auxiliary connecting drill rod 42 to move downward, and provide downward pressure when the center drill rod 41 and the auxiliary connecting drill rod 42 are drilling and tapping. The hydraulic power station 7 controls the position locking mechanism 5, and the device can be clamped and fixed on the top of the pile body 8.

[0030] As a further implementation scheme of the above invention: the drilling and tapping mechanism 4 also includes a transmission gear 43, a central drill rod 41 and a plurality of auxiliary connecting drill rods 42 are movably installed at the bottom end of the installation box 1, and a plurality of auxiliary connecting drill rods 42 are distributed around the circumference of the central drill rod 41, the central drill rod 41 and the plurality of auxiliary connecting drill rods 42 cooperate with each other, and the pile body 8 can be pulled at multiple locations to avoid slipping, and the top ends of the central drill rod 41 and the auxiliary connecting drill rods 42 are fixedly mounted with a transmission gear 43 located inside the installation box 1, and the central drill rod 41 and the auxiliary connecting drill rod 42 can be rotated to drill holes in the top of the pile body 8 and perform tapping operations simultaneously, so that the central drill rod 41 and the auxiliary connecting drill rod 42 can be threadedly connected to the top of the pile body 8 through the tapping section 47, providing a force point for pulling the pile body 8.

[0031] As a further implementation scheme of the above invention: the transmission gear 43 at the top of the central drill rod 41 and the auxiliary connecting drill rod 42 are meshed with each other. When the hydraulic motor 44 drives the central drill rod 41 to rotate, it can synchronously drive several auxiliary connecting drill rods 42 to rotate, thereby realizing the linkage control of multiple drill rods, realizing the synchronous connection of multiple drill rods with the pile body 8, and improving the degree of automation. The tapping section 47 and the drilling section 48 on the outside of the central drill rod 41 and the auxiliary connecting drill rod 42 are counter-rotating. Since the central drill rod 41 and the auxiliary connecting drill rod 42 are transmitted through the transmission gear 43, the central drill rod 41 and the auxiliary connecting drill rod 42 rotate in opposite directions. The tapping section 47 and the drilling section 48 are counter-rotatingly arranged to ensure that the central drill rod 41 and the auxiliary connecting drill rod 42 can perform drilling and tapping operations on the pile body 8 when they rotate synchronously.

[0032] As a further implementation scheme of the above invention: the drilling and tapping mechanism 4 also includes a hydraulic motor 44, a plug-in rod 45 and a plug-in groove 46. The hydraulic motor 44 is fixedly installed on the top of the sealing top plate 2. The plug-in rod 45 is arranged on the output shaft of the hydraulic motor 44. The top of the center drill rod 41 is provided with a plug-in groove 46 that cooperates with the plug-in rod 45. The plug-in rod 45 can be plugged into the plug-in groove 46 to realize the transmission between the center drill rod 41 and the hydraulic motor 44, and at the same time, it is convenient to disassemble and assemble the hydraulic motor 44 through the sealing top plate 2. The axial cross-sectional shape of the plug-in rod 45 is hexagonal, which ensures that the hydraulic motor 44 can transmit torque through the plug-in rod 45 and the plug-in groove 46 when working, thereby driving the center drill rod 41 to rotate. The hydraulic motor 44 is connected to the hydraulic power station 7 through a hydraulic hose, and the hydraulic power station 7 can control the start and stop and the speed of the hydraulic motor 44 through the hydraulic hose.

[0033] As a further implementation scheme of the above invention: the position locking mechanism 5 includes two groups of connecting arms 51, a hydraulic cylinder 52 and a positioning chuck 53. The two groups of connecting arms 51 are distributed on the outside of the installation box 1 in a mirror image, and the ends of the two groups of connecting arms 51 are fixedly installed with hydraulic cylinders 52, and the positioning chuck 53 is fixedly installed on the output shaft of the hydraulic cylinder 52. The positioning chuck 53 on the output shaft is driven by the two groups of hydraulic cylinders 52 to move and clamp the pile body 8, and the device is locked on the pile body 8, so as to ensure that the movable center drill rod 41 of the installation box 1 and the auxiliary connecting drill rod 41 are fixedly installed. When the rod 42 moves, drilling and tapping operations can be performed on the pile body 8. The oil inlets of the two groups of hydraulic cylinders 52 are fixedly connected with a main oil inlet pipe 54, and the oil return ports are fixedly connected with a main oil return pipe 55. The main oil inlet pipe 54 and the main oil return pipe 55 are connected to the hydraulic power station 7 through hydraulic hoses. The hydraulic power station 7 can control the start and stop of the hydraulic cylinder 52 through the hydraulic hose, and at the same time, the hydraulic oil is transported through the main oil inlet pipe 54 and the main oil return pipe 55, so that the two groups of hydraulic cylinders 52 can move synchronously, thereby realizing the centering clamping of the pile body 8 by the position locking mechanism 5.

[0034] As a further implementation scheme of the above invention: the position locking mechanism 5 also includes a guide rail 56 and a guide groove 57. The guide rail 56 is fixedly installed on the installation box 1. A guide groove 57 that cooperates with the guide rail 56 is opened on the side of the connecting arm 51 close to the installation box 1. The installation box 1 is restricted by the cooperation of the guide rail 56 and the guide groove 57 to ensure the stability of the installation box 1 when moving inside the position locking mechanism 5, and to ensure that the center drill rod 41 and the auxiliary connecting drill rod 42 can be vertically drilled into the pile body 8.

[0035] As a further implementation scheme of the above invention: the height adjustment mechanism 6 includes a driving sprocket 61, a transmission chain 63, an adjusting screw 64 and a hydraulic motor 2 66. The number of the driving sprockets 61 is four, and the driving sprockets 61 are movably installed on the installation box 1. The driving sprockets 61 are mirror-distributed on both sides of the two connecting arms 51 in pairs. The transmission chain 63 is meshed and sleeved on the outside of the driving sprocket 61. The transmission is carried out through the transmission chain 63 and the driving sprocket 61 to ensure the transmission effect and avoid slipping. The hydraulic motor 2 66 is fixedly installed on the top of the sealing top plate 2, and the output shaft of the hydraulic motor 2 66 It is fixedly connected to any driving sprocket 61, powered by hydraulic motor 2 66, and transmitted through driving sprocket 61 and transmission chain 63. Hydraulic motor 2 66 can drive four sets of adjusting screws 64 to rotate synchronously, provide power for the movement of installation box 1 at multiple positions, and ensure the stability of installation box 1 and drill rod during movement. The bottom ends of four sets of driving sprockets 61 are fixedly connected with adjusting screws 64, and the adjusting screws 64 are threadedly connected to connecting arm 51. Hydraulic motor 2 66 is connected to hydraulic power station 7 through hydraulic hose, and hydraulic power station 7 can control the start and stop and rotation speed of hydraulic motor 2 66 through hydraulic hose.

[0036] As a further implementation scheme of the above invention: the height adjustment mechanism 6 also includes a plurality of positioning sprockets 62 and a plurality of positioning pulleys 65, the positioning sprockets 62 and the positioning pulleys 65 are movably mounted on the peripheral side of the installation box 1, the transmission chain 63 is meshed and sleeved on the outside of the positioning sprocket 62, and the position of the transmission chain 63 is limited by the positioning sprocket 62 to avoid friction between the transmission chain 63 and the installation box 1 during operation, and the positioning pulley 65 is clamped on the outside of the transmission chain 63, and the transmission chain 63 is limited by the positioning pulley 65 to prevent the transmission chain 63 from falling off along the outside of the driving sprocket 61 when the transmission chain 63 is horizontally operated.

[0037] As a further implementation scheme of the above invention: the positioning pulleys 65 are evenly distributed on the circumferential side of the installation box 1, and the radial cross-sectional shape of the positioning pulley 65 is an "I" shape. The positioning pulley 65 is clamped on the outside of the transmission chain 63 to limit the transmission chain 63, thereby ensuring the stability of the transmission chain 63 during horizontal operation, and further realizing the transmission chain 63 to transmit power between multiple drive sprockets 61.

[0038] As a further implementation scheme of the above invention: the hydraulic power station 7 includes but is not limited to a hydraulic pump, a hydraulic control valve, and a hydraulic container. The hydraulic power station 7 is a common existing technology. The hydraulic pump can convert electrical energy into hydraulic energy, the hydraulic control valve can control the flow and pressure of the hydraulic oil, and the hydraulic container is used to store the hydraulic oil. The length of the hydraulic hose is adapted to the height to which the pile body 8 needs to be pulled out, ensuring that when the pile body 8 is pulled, the hydraulic hose can stably transmit power to the hydraulic motor 1 44, the hydraulic motor 2 66 and the hydraulic cylinder 52.

[0039] During the specific implementation: the hydraulic motor 1 44, the hydraulic motor 2 66 and the hydraulic cylinder 52 are connected to the hydraulic power station 7 through the hydraulic hose, so that the hydraulic power station 7 can provide power to the hydraulic motor 1 44, the hydraulic motor 2 66 and the hydraulic cylinder 52, and can control the hydraulic motor 1 44, the hydraulic motor 2 66 and the hydraulic cylinder 52; the device is connected to the lifting equipment in the prior art through the lifting frame 3, and the lifting equipment can be a crane, and the lifting equipment provides a pulling force for pulling out the pile body 8; the device is hoisted to the top of the pile body 8 to be pulled out through the lifting equipment, and the hydraulic The power station 7 controls the two groups of hydraulic cylinders 52 to move, drive the positioning chuck 53 to move inward to clamp the pile body 8, and fix the device to the end of the pile body 8. Then, the hydraulic power station 7 controls the hydraulic motor 1 44 to rotate. The hydraulic motor 1 44 drives the central drill rod 41 to rotate through the plug rod 45 on the output shaft and the plug groove 46. The central drill rod 41 is driven by the transmission gear 43 to rotate the auxiliary connecting drill rods 42 on the peripheral side. After the hydraulic motor 1 44 is started, the hydraulic power station 7 synchronously controls the hydraulic motor 2 66 to start, and the hydraulic motor 2 66 drives the output shaft The driving sprocket 61 on the output shaft rotates, and drives all the driving sprockets 61 to rotate through the transmission chain 63, thereby driving multiple groups of adjusting screws 64 to rotate synchronously, driving the installation box 1 to move downward as a whole. When the transmission chain 63 rotates, the positioning sprocket 62 and the positioning pulley 65 cooperate to limit the position of the transmission chain 63; when the central drill rod 41 and the auxiliary connecting drill rod 42 rotate, the central drill rod 41 and the auxiliary connecting drill rod 42 are synchronously driven to move downward, and holes are drilled at the top of the pile body 8 through the drilling sections 48 on the central drill rod 41 and the auxiliary connecting drill rod 42. The tapping sections 47 on the center drill rod 41 and the auxiliary connecting drill rod 42 are used to tap the drilled holes. When the center drill rod 41 and the auxiliary connecting drill rod 42 are moved down to their proper positions, the center drill rod 41 and the auxiliary connecting drill rod 42 are threadedly connected to the pile body 8 through the drilling section 48. After the center drill rod 41 and the auxiliary connecting drill rod 42 are moved down to their proper positions, the two groups of hydraulic cylinders 52 are controlled by the hydraulic power station 7 to reset, and the clamping state of the positioning chuck 53 on the pile body 8 is released. The hoisting frame 3, the installation box 1, the center drill rod 41 and the auxiliary connecting drill rod 42 are pulled up by the hoisting equipment, thereby pulling out the pile body 8.

[0040] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A pile pulling device for civil engineering, comprising a mounting box (1), a hydraulic power station (7) and a pile body (8), characterized in that: A sealing top plate (2) is fixedly installed on the top of the installation box (1) by bolts, and a hanging frame (3) is welded on the top of the sealing top plate (2). A drilling and tapping mechanism (4) for drilling and tapping the pile body (8) is arranged on the installation box (1). The drilling and tapping mechanism (4) comprises a group of central drill rods (41) and a plurality of auxiliary connecting drill rods (42). The central drill rod (41) and the plurality of auxiliary connecting drill rods (42) are linked and controlled. The central drill rod (41) and the auxiliary connecting drill rods (42) are both provided with a drilling section (48) and a tapping section (47) from bottom to top. The outside of the installation box (1) is provided with a drilling section (48) and a tapping section (47) for drilling and tapping the pile body (8). The clamping position locking mechanism (5) is provided with a height adjustment mechanism (6) on the peripheral side of the installation box (1), and the height adjustment mechanism (6) cooperates with the position locking mechanism (5) to drive the installation box (1) to move upward or downward inside the position locking mechanism (5), and the hydraulic power station (7) is connected to the drilling and tapping mechanism (4), the position locking mechanism (5) and the height adjustment mechanism (6) through a hydraulic hose, and the hydraulic power station (7) can provide power to the drilling and tapping mechanism (4), the position locking mechanism (5) and the height adjustment mechanism (6) and can control the working states of the drilling and tapping mechanism (4), the position locking mechanism (5) and the height adjustment mechanism (6); The position locking mechanism (5) comprises two groups of connecting arms (51), a hydraulic cylinder (52) and a positioning chuck (53), the two groups of connecting arms (51) are distributed in a mirror image outside the installation box (1), and the ends of the two groups of connecting arms (51) are fixedly mounted with a hydraulic cylinder (52), the output shaft of the hydraulic cylinder (52) is fixedly mounted with a positioning chuck (53), the oil inlets of the two groups of hydraulic cylinders (52) are fixedly connected with a main oil inlet pipe (54), and the oil return ports are fixedly connected with a main oil return pipe (55), and the main oil inlet pipe (54) and the main oil return pipe (55) are connected to the hydraulic power station (7) via a hydraulic hose; The position locking mechanism (5) further comprises a guide rail (56) and a guide slot (57), wherein the guide rail (56) is fixedly mounted on the installation box (1), and a guide slot (57) cooperating with the guide rail (56) is provided on a side of the connecting arm (51) close to the installation box (1); The height adjustment mechanism (6) comprises a driving sprocket (61), a transmission chain (63), an adjusting screw (64) and a second hydraulic motor (66). The number of the driving sprockets (61) is four, and the driving sprockets (61) are movably mounted on the mounting box (1). The driving sprockets (61) are mirror-imaged on both sides of two connecting arms (51) in a group of two. The transmission chain (63) is meshingly sleeved on the outside of the driving sprockets (61). The second hydraulic motor (66) is fixedly mounted on the top of the sealing top plate (2), and the output shaft of the second hydraulic motor (66) is fixedly connected to any driving sprocket (61). The bottom ends of the four groups of driving sprockets (61) are fixedly connected to the adjusting screws (64), and the adjusting screws (64) are threadedly connected to the connecting arms (51). The second hydraulic motor (66) is connected to the hydraulic power station (7) via a hydraulic hose. The height adjustment mechanism (6) further comprises a plurality of positioning sprockets (62) and a plurality of positioning pulleys (65), wherein the positioning sprockets (62) and the positioning pulleys (65) are both movably mounted on the peripheral side of the installation box (1), the transmission chain (63) is meshedly sleeved on the outside of the positioning sprockets (62), and the positioning pulleys (65) are clamped on the outside of the transmission chain (63); The positioning pulleys (65) are evenly distributed on the circumference of the installation box (1), and the radial cross-sectional shape of the positioning pulleys (65) is an "I" shape.

2. A pile pulling device for civil engineering according to claim 1, characterized in that: The drilling and tapping mechanism (4) further comprises a transmission gear (43); the central drill rod (41) and a plurality of auxiliary connecting drill rods (42) are movably mounted on the bottom end of the installation box (1); and the plurality of auxiliary connecting drill rods (42) are distributed around the central drill rod (41); and the top ends of the central drill rod (41) and the auxiliary connecting drill rods (42) are fixedly sleeved with a transmission gear (43) located inside the installation box (1).

3. A pile pulling device for civil engineering according to claim 2, characterized in that: The transmission gear (43) at the top end of the central drill rod (41) and the auxiliary connecting drill rod (42) are meshed with each other, and the tapping section (47) and the drilling section (48) outside the central drill rod (41) and the auxiliary connecting drill rod (42) rotate in opposite directions.

4. A pile pulling device for civil engineering according to claim 1, characterized in that: The drilling and tapping mechanism (4) further comprises a hydraulic motor (44), a plug-in rod (45) and a plug-in slot (46); the hydraulic motor (44) is fixedly mounted on the top of the sealing top plate (2); the output shaft of the hydraulic motor (44) is provided with a plug-in rod (45); the top of the center drill rod (41) is provided with a plug-in slot (46) that matches the plug-in rod (45); the axial cross-section of the plug-in rod (45) is hexagonal; and the hydraulic motor (44) is connected to the hydraulic power station (7) via a hydraulic hose.

5. The pile pulling device for civil engineering according to claim 1, characterized in that: The hydraulic power station (7) includes, but is not limited to, a hydraulic pump, a hydraulic control valve, and a hydraulic container. The length of the hydraulic hose is adapted to the height at which the pile body (8) needs to be pulled out.

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