Scaffold bottom end steel pipe pulling-out device

Abstract

The utility model discloses a device for pulling out a steel pipe at the bottom end of a scaffold, which comprises an upper clamping plate, a lower clamping plate, a hydraulic cylinder, a hoop device and a soil loosening device, and the hydraulic cylinder is fixed between the upper clamping plate and the lower clamping plate; the hoop device is arranged above the upper clamping plate, the two U-shaped hoops are clamped and fixed to the steel pipe, and a first handle is arranged on the outer side of each U-shaped hoop in the radial direction. The soil loosening device comprises a chassis, a supporting frame and a pointed cone, the chassis sleeves the steel pipe between the upper clamping plate and the lower clamping plate, the outer side of the chassis is the same as the through hole in shape and smaller than the through hole in size, the inner side of the supporting frame is fixed to the chassis, and a second handle is fixed to the upper end of the supporting frame; the pointed cone is fixed on the lower side of the chassis, penetrates through the through hole and extends to the ground; the chassis is driven by the supporting frame to move and rotate on the steel pipe. Before the hydraulic cylinder pulls out the steel pipe, the soil loosening device is inserted or pulled out or rotated to loosen a soil layer on the ground around the steel pipe, the steel pipe is shaken through the hoop device, a gap between the steel pipe and the ground is further enlarged, and the steel pipe pulling-out process is faster and more labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe pulling machines, in particular to a steel pipe pulling device at the bottom end of a scaffold. Background Art

[0002] In the process of construction, erecting scaffolding is an indispensable process. Because the upper end needs to carry the construction platform and building materials, the steel pipes at the bottom of the scaffolding are generally inserted deeper into the soil foundation to enhance stability. When the construction is completed, the steel pipes need to be pulled out to restore the soil foundation, which is also convenient for recycling.

[0003] The invention patent with the patent number "CN115492545A" and the patent application date of September 9, 2022 discloses an automatic hydraulic pipe pulling machine, in which a crossbeam is arranged between two lifting cylinders, and a clamping mechanism for fixing the steel pipe is arranged in the center of the crossbeam, and the steel pipe is pulled out by the lifting cylinder. However, the structure still has the following defects:

[0004] 1. Pull out the steel pipe directly with the lifting cylinder. The friction between the clamping mechanism and the steel pipe clamp position is too large, which may easily cause damage to the clamping mechanism or the steel pipe, affecting the secondary use;

[0005] 2. The above-mentioned pipe pulling machine is large in size and complex in structure. When pulling out multiple steel pipes, it is difficult and time-consuming to move and install. Utility Model Content

[0006] In order to solve the technical problems that the pipe pulling machine and the steel pipe are easily damaged due to excessive force, and the pipe pulling machine is difficult and time-consuming to move and install, the utility model provides a steel pipe pulling device at the bottom end of a scaffold.

[0007] To achieve this technical purpose, the utility model adopts the following scheme:

[0008] A scaffold bottom steel pipe extraction device is sleeved on the steel pipe at the bottom of the scaffold, comprising an upper clamping plate and a lower clamping plate, wherein the geometric centers of the upper clamping plate and the lower clamping plate are provided with through holes for passing the steel pipe, and the lower side of the lower clamping plate abuts against the ground, and further comprising:

[0009] Three hydraulic cylinders are fixed between the upper clamping plate and the lower clamping plate. Each hydraulic cylinder is arranged with the same axial ring distance of the steel pipe. The piston end of the hydraulic cylinder is fixed to the upper clamping plate, and the cylinder end of the hydraulic cylinder is fixed to the lower clamping plate.

[0010] The clamp device is arranged above the upper clamp plate, and includes two opposite U-shaped clamps, which are fixed by bolts to form a circular clamp and clamped on the steel pipe. At least one first handle is radially arranged on the outer side of each U-shaped clamp, and the length from the steel pipe axis to the outer side of the first handle is greater than the diameter of the through hole;

[0011] The loosening device includes a chassis, a support frame and a pointed cone. The chassis is sleeved on the steel pipe between the upper and lower clamping plates. The shape of the outer side of the chassis is the same as the through hole and the size is smaller than the through hole. The inner side of the support frame is fixed on the chassis and extends to the outside of the steel pipe avoiding the position of the hydraulic cylinder. At least two second handles are fixed on the upper end of the support frame. The pointed cone is fixed on the lower side of the chassis, and its tip extends to the ground through the through hole. The chassis is driven to move and rotate on the steel pipe through the support frame.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. Before the hydraulic cylinder pulls out the steel pipe, first plug in or rotate the loosening device to loosen the soil layer around the steel pipe. The subsequent pulling out process will be faster and more labor-saving, and it can effectively avoid the clamp device and the steel pipe being too tightly fixed and damaged during the pulling out process;

[0014] 2. After the loosening is completed, shake the steel pipe through the second handle on the clamp device to further increase the gap between the steel pipe and the ground, making the steel pipe extraction process faster and more labor-saving;

[0015] 3. The three hydraulic cylinders form a stable power source for pipe pulling, which can prevent the steel pipe from being deflected and damaged during the pipe pulling process.

[0016] The preferred embodiment of the present utility model is:

[0017] Annular rubber pads are fixed on the inner sides of the two U-shaped clamps; the annular rubber pads increase the friction between the U-shaped clamps and the steel pipe fixing positions, making it easier for the hydraulic cylinder to lift and pull out the steel pipe.

[0018] Three first handles are fixed at equal intervals on each U-shaped clamp, and the length of the middle first handle is greater than that of the first handles on both sides; the three first handles are arranged at equal intervals in the horizontal direction, which makes it easy to choose the first handle in any direction to shake the steel pipe, saving effort when shaking.

[0019] The support frame includes a support ring and three support rods. Two second handles are provided and symmetrically fixed on the support ring. The inner ends of the three support rods are fixed to the outer side of the chassis at equal intervals, and the outer ends are fixed to the support ring. Through the above structure, it is convenient to control the movement and rotation of the chassis through the second handle, making the loosening process more convenient and labor-saving.

[0020] The lower surface of the lower clamping plate is annularly fixed with a plurality of bottom corners, which are inverted triangular strip structures, and the tips of the bottom corners are inserted into the ground. The above bottom angle structure increases the friction between the lower clamping plate and the ground, reducing the possibility of movement or rotation of the device.

[0021] The upper clamping plate and the lower clamping plate are disc structures with the same size, and the through holes are circular through holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the clamp device of the utility model;

[0024] Figure 3 This is a schematic diagram of the structure of the hydraulic cylinder of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the soil loosening device of the utility model;

[0026] Figure 5 It is a bottom view schematic diagram of the lower splint of the utility model;

[0027] The markings in the figure are: 1. steel pipe; 2. clamp device; 21. first handle; 22. U-shaped clamp; 23. annular rubber pad; 24. bolt; 3. upper clamp; 4. hydraulic cylinder; 41. piston end; 42. cylinder end; 5. loosening device; 51. support ring; 52. support rod; 53. chassis; 54. second handle; 55. pointed cone; 6. lower clamp; 61. bottom angle. DETAILED DESCRIPTION

[0028] In order to fully understand the purpose, features and effects of the present invention, the present invention is described in detail through the following specific implementation methods, but the present invention is not limited thereto.

[0029] Reference Figure 1-5 This embodiment discloses a steel pipe extraction device at the bottom of a scaffold, which is sleeved on the steel pipe 1 at the bottom of the scaffold, and includes an upper clamping plate 3 and a lower clamping plate 6. The geometric centers of the upper clamping plate 3 and the lower clamping plate 6 are each provided with a through hole for passing the steel pipe 1. The upper clamping plate 3 and the lower clamping plate 6 are disc structures of the same size, and the through hole is a circular through hole;

[0030] Three hydraulic cylinders 4 are provided, fixed between the upper clamping plate 3 and the lower clamping plate 6, and each hydraulic cylinder 4 is arranged with the same axial center ring distance of the steel pipe 1, the piston end 41 of the hydraulic cylinder 4 is fixed to the upper clamping plate 3, and the cylinder end 42 of the hydraulic cylinder 4 is fixed to the lower clamping plate 6;

[0031] The clamp device 2 is arranged above the upper clamp plate 3, and includes two opposite U-shaped clamps 22. The two U-shaped clamps 22 are combined and fixed by bolts 24 to form a circular clamp and clamped on the steel pipe 1. At least one first handle 21 is radially arranged on the outer side of each U-shaped clamp 22. The length from the axis of the steel pipe 1 to the outer side of the first handle 21 is greater than the diameter of the through hole;

[0032] The loosening device 5 includes a chassis 53, a support frame and a pointed cone 55. The chassis 53 is sleeved on the steel pipe 1 between the upper and lower clamping plates 6. The shape of the outer side of the chassis 53 is the same as the through hole and the size is smaller than the through hole. The inner side of the support frame is fixed on the chassis 53 and extends to the outside of the steel pipe 1 avoiding the position of the hydraulic cylinder 4. At least two second handles 54 are fixed on its upper end; the pointed cone 55 is fixed on the lower side of the chassis 53, and its tip extends to the ground through the through hole; the chassis 53 is driven to move and rotate on the steel pipe 1 through the support frame.

[0033] In this embodiment, before the hydraulic cylinder 4 pulls out the steel pipe 1, the loosening device 5 is first inserted, pulled out or rotated to loosen the soil layer on the surface around the steel pipe 1, so that the subsequent pulling out process is faster and more labor-saving, and the clamp device 2 and the steel pipe 1 are avoided from being damaged during the pulling out process; after the loosening is completed, the steel pipe 1 can be shaken by the second handle 54 on the clamp device 2 to further increase the gap between the steel pipe 1 and the ground, making the pulling out process of the steel pipe 1 faster and more labor-saving; the three hydraulic cylinders 4 form a stable power source for pulling out the pipe, which can avoid the deviation of the steel pipe 1 during the pulling out process and damage to the steel pipe 1.

[0034] In this embodiment, an annular rubber pad 23 is fixed to the inner side of the two U-shaped clamps 22; the shape of the U-shaped clamp 22 is as shown in FIG. Figure 2 , which is composed of a U-shaped groove plate in the middle and connecting plates fixed at both ends of the U-shaped groove plate. Bolt holes are opened on the connecting plates. After the two U-shaped clamps 22 are connected, bolts 24 are used to pass through the bolt holes on both sides respectively to fix the two U-shaped clamps 22. Glue is used to bond an annular rubber pad 23 in the middle of the U-shaped groove plate. The annular rubber pad 23 increases the friction between the U-shaped clamp 22 and the fixed position of the steel pipe 1, which is convenient for the hydraulic cylinder 4 to lift and pull out the steel pipe 1.

[0035] As an option, three first handles 21 are fixed radially and evenly spaced on the outer side wall of each U-shaped clamp 22, the first handles 21 on the two U-shaped clamps 22 are arranged at the same position, and the length of the first handle 21 fixed in the middle of the U-shaped clamp 22 is greater than the length of the first handles 21 on both sides; preferably, soft silicone pads are wrapped around the first handle 21 and the second handle 54, and the soft silicone material can reduce hand wear when the operator holds the first handle 21 and the second handle 54; the three first handles 21 are arranged at equal intervals in the horizontal direction, which makes it easy to select the first handle 21 in any direction to shake the steel pipe 1, which saves more effort when shaking.

[0036] In this embodiment, the support frame includes a support ring 51 and three support rods 52, the inner ends of the three support rods 52 are fixed on the outer side of the chassis 53 at equal intervals, and the outer ends thereof are fixed to the inner wall of the support ring 51; two second handles 54 are symmetrically fixed on the support ring 51, and the second handles 54 are composed of a vertical handle and a horizontal handle fixed on the outer side of the vertical handle, which is convenient for the operator to choose according to the actual situation, making the loosening process more labor-saving; because the three support rods 52 and the three hydraulic cylinders 4 are all arranged with equal ring spacing on the axis of the steel pipe 1, when the loosening device 5 is rotated, its maximum rotation angle is the angle between the two hydraulic cylinders 4, which is sufficient to make the pointed cone 55 break and loosen the soil layer on the ground; through the above structure, it is convenient to control the movement and rotation of the chassis 53 through the second handle 54, making the loosening process more convenient and labor-saving.

[0037] In this embodiment, the lower surface of the lower clamping plate 6 is annularly fixed with a plurality of bottom angles 61, and the bottom angles 61 are long strips of inverted triangle structures. As an option, the bottom angles 61 are long strips of right-angled inverted triangle structures, one of the faces of which is fixed to the lower surface of the lower clamping plate 6, and the other two faces constitute the tips of the bottom angles 61 inserted into the ground; through the above-mentioned bottom angle 61 structure, the friction between the lower clamping plate 6 and the ground is increased, and the possibility of movement or rotation of the device is reduced.

[0038] The operating principle of the device is as follows: put the device on the steel pipe 1 on the ground so that the lower surface contacts the ground around the steel pipe 1, put the clamp device 2 on the steel pipe 1 at the upper end of the upper clamp plate 3, and fix it with bolts 24, first rotate or move up and down the pointed cone 55 at the bottom of the chassis 53 through the second handle 54 to loosen the soil around the pipe body, then shake the steel pipe 1 through the first handle 21 to loosen it in the soil, and finally control the piston rod of the hydraulic cylinder 4 to move upward at the same time to lift the upper clamp plate 3, and the first handle 21 of the clamp device 2 above the upper clamp plate 3 drives the clamped steel pipe 1 to move upward, thereby pulling out the steel pipe 1.

[0039] Finally, it should be noted that the above-listed examples are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and modifications fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A scaffold bottom steel pipe extraction device, which is sleeved on the steel pipe (1) at the bottom of the scaffold, comprises an upper clamping plate (3) and a lower clamping plate (6), the geometric centers of the upper clamping plate (3) and the lower clamping plate (6) are provided with through holes for inserting the steel pipe (1), and the lower side of the lower clamping plate (6) is in contact with the ground, characterized in that: Also includes: Three hydraulic cylinders (4) are fixed between an upper clamping plate (3) and a lower clamping plate (6), each hydraulic cylinder (4) is arranged with the same axial center ring distance of the steel pipe (1), a piston end (41) of the hydraulic cylinder (4) is fixed to the upper clamping plate (3), and a cylinder body end (42) of the hydraulic cylinder (4) is fixed to the lower clamping plate (6); The clamp device (2) is arranged above the upper clamp plate (3), and comprises two opposite U-shaped clamps (22). The two U-shaped clamps (22) are combined and fixed by bolts (24) to form a circular clamp and clamped on the steel pipe (1). At least one first handle (21) is radially arranged on the outer side of each U-shaped clamp (22), and the length from the axis of the steel pipe (1) to the outer side of the first handle (21) is greater than the diameter of the through hole. The loosening device (5) comprises a chassis (53), a support frame and a pointed cone (55). The chassis (53) is sleeved on a steel pipe (1) between upper and lower clamping plates (6). The shape of the outer side of the chassis (53) is the same as that of the through hole and the size is smaller than the through hole. The inner side of the support frame is fixed on the chassis (53) and extends to the outer side of the steel pipe (1) avoiding the position of the hydraulic cylinder (4). At least two second handles (54) are fixed on the upper end of the support frame. The pointed cone (55) is fixed on the lower side of the chassis (53) and its tip passes through the through hole and extends toward the ground. The chassis (53) is driven to move and rotate on the steel pipe (1) through the support frame.

2. The scaffold bottom steel pipe extraction device according to claim 1, characterized in that: An annular rubber pad (23) is fixed on the inner side of the two U-shaped clamps (22).

3. The device for extracting the steel pipe (1) at the bottom of the scaffold according to claim 1, characterized in that: Three first handles (21) are fixed at equal intervals on each U-shaped clamp (22), and the length of the middle first handle (21) is greater than the lengths of the first handles (21) on both sides.

4. The scaffold bottom steel pipe extraction device according to claim 1, characterized in that: The support frame comprises a support ring (51) and three support rods (52); two second handles (54) are provided and are symmetrically fixed on the support ring (51); the inner ends of the three support rods (52) are fixed to the side of the chassis (53) at equal intervals, and the outer ends thereof are fixed to the support ring (51).

5. The scaffold bottom steel pipe extraction device according to claim 1, characterized in that: The lower surface of the lower clamping plate (6) is annularly fixed with a plurality of bottom corners (61), the bottom corners (61) being an inverted triangular strip structure, the tips of the bottom corners being inserted into the ground.

6. The scaffold bottom steel pipe extraction device according to claim 1, characterized in that: The upper clamping plate (3) and the lower clamping plate (6) are disc structures of the same size, and the through holes are circular through holes.

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