Steel pipe pile recovery device
By designing a steel pipe pile recovery device, and utilizing the cooperation of the lower clamping block and the lifting mechanism, the problem of insufficient friction in the later stage of operation of the steel pipe pile extractor was solved, realizing stable extraction and efficient recovery of steel pipe piles, and ensuring safety and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-03-20
AI Technical Summary
The existing steel pipe pile extractor has insufficient friction in the later stages of operation, which makes the steel pipe pile easy to fall, affecting the recovery efficiency and posing a safety hazard.
A steel pipe pile recycling device was designed, which uses a lower clamping block to clamp the steel pipe pile, combined with a lifting mechanism and a gear and rack mechanism to realize the automatic clamping and loosening of the steel pipe pile. The "eight" shaped structure is used to decompose the lifting force to ensure stability, and the difficulty is reduced by spiral pulling.
It improves the safety and efficiency of steel pipe pile recovery, is applicable to steel pipe piles of different diameters, reduces the difficulty of extraction, and avoids the risk of falling.
Smart Images
Figure CN224016309U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of steel pipe pile construction, especially relates to a steel pipe pile recovery device. BACKGROUND
[0002] As an important foundation construction material, steel pipe piles are widely used in various civil engineering projects, especially in bridge construction, high-rise building foundation treatment and underground space development projects. After the completion of these projects, the subsequent treatment of steel pipe piles becomes a problem that cannot be ignored. If the steel pipe piles are not timely and effectively recycled, not only will it result in additional construction costs, but also long-term burial in the ground may cause metal pollution and pose a potential threat to the soil and groundwater environment. More seriously, with the continuous development and utilization of urban underground space, such as the excavation of subway tunnels, the construction of comprehensive pipe galleries, and the laying of power tunnels, the remaining steel pipe piles become a safety hazard in major projects such as shield construction, greatly increasing the difficulty and risk of construction.
[0003] In response to the need for steel pipe pile recycling, two main recycling methods are currently used in the industry. The first method relies on large cranes, which can directly pull out steel pipe piles one by one through the powerful lifting capacity of the crane. This method is simple to operate and efficient, especially suitable for open site scenarios. However, the cost of crane rental and operation is high, and for projects with limited budget or restricted construction environment, it is obviously not the best choice.
[0004] Another more economical and flexible recycling method is to use a special steel pipe pile extractor. This type of equipment is usually composed of a base, a hydraulic cylinder, and a steel pipe clamp. During operation, the clamp clamps the steel pipe pile, and then the hydraulic cylinder extends and retracts to move the clamp upwards, gradually pulling the steel pipe pile out. This solution is particularly suitable for narrow or complex terrain where cranes cannot enter, effectively reducing the cost of recycling. However, in actual operation, as the steel pipe pile is gradually pulled out, its contact area with the surrounding anchor hole gradually decreases, resulting in insufficient friction from the anchor hole wall to support the weight of the steel pipe pile. Especially when the steel pipe pile is pulled out to a high height, this lack of friction is particularly prominent, and the steel pipe pile is prone to sudden falling, not only affecting the efficiency of the recycling operation, but also posing a safety hazard to the operator and the surrounding environment. SUMMARY
[0005] The utility model aims at overcoming the deficiency in the prior art, provides a kind of steel pipe pile recovery device, to solve the problem that steel pipe pile is easily fallen in the later period of the operation of existing steel pipe pile extractor, guarantee the safety of steel pipe pile pulling-out operation.
[0006] To achieve the above object, the utility model adopts the technical scheme that:
[0007] A steel pipe pile recycling device includes a base, with legs at the bottom and a mounting seat at the top. A hinged support is mounted on the mounting seat, and a lifting mechanism is pivotally connected to the hinged support. A steel pipe clamp is mounted at the upper end of the lifting mechanism for clamping the steel pipe pile. A through hole is provided in the middle of the base and mounting seat. Two fixed seats are symmetrically mounted on both sides of the mounting seat. A lower clamping block is provided on one side of each fixed seat, and a tightening screw is rotatably connected to one side of the lower clamping block. The tightening screw is threadedly connected to the fixed seat. Guide rods are provided on both sides of the tightening screw, with one end of each guide rod fixedly connected to the lower clamping block and with a clearance fit between the guide rod and the fixed seat.
[0008] Furthermore, the steel pipe clamp includes two symmetrically arranged extrusion blocks. The lower part of the extrusion block is provided with a support rod. A bushing is sleeved on the outside of the support rod. The lower end of the bushing is fixedly installed on the mounting base. A spring is connected between the lower end of the support rod and the upper surface of the mounting base. The inner surface of the extrusion block is provided with a guide groove. An upper clamping block is provided on the inner side of the extrusion block. The contact surface between the extrusion block and the upper clamping block is an inclined surface. A guide rail that is clearance-fitted with the guide groove is provided on one side of the upper clamping block. The lower part of the upper clamping block is pivotally connected to the upper end of the lifting mechanism.
[0009] Furthermore, several tie rods connect the extrusion blocks on both sides.
[0010] Furthermore, both the upper and lower clamping blocks are provided with V-shaped openings, and both the upper and lower clamping blocks have anti-slip pads on their inner walls.
[0011] Furthermore, the support leg is threadedly connected to the base.
[0012] Furthermore, a sleeve is fixedly connected inside the through hole of the mounting base. The sleeve is rotatably connected to the base, and a toothed ring is fixedly connected to the bottom of the sleeve. A telescopic mechanism is fixedly installed on the lower part of the base. One end of the telescopic mechanism is connected to a rack. The rack is slidably connected to the lower surface of the base, and the rack meshes with the toothed ring.
[0013] Furthermore, the lifting mechanism and the telescopic mechanism are equipped with hydraulic cylinders or electric cylinders.
[0014] Furthermore, the base is provided with an arc-shaped slide rail, and the lower part of the mounting base is provided with several sliders, which are slidably mounted on the arc-shaped slide rail.
[0015] Furthermore, the hinge support is threaded with an adjusting screw, the two ends of which are rotatably mounted on a fixed plate. The fixed plate is fixedly mounted on the mounting base. When the upper clamping block clamps the steel pipe pile, the lifting mechanism forms an "eight" shape.
[0016] The beneficial effects of this utility model are:
[0017] 1) By setting a lower clamping block on the mounting base, the steel pipe clamp can clamp the steel pipe pile after the steel pipe pile is released, thus preventing the steel pipe pile from falling and ensuring the safety of the operators.
[0018] 2) The steel pipe clamp is linked with the lifting mechanism. When the lifting mechanism extends, the steel pipe clamp automatically clamps the steel pipe pile. When the lifting mechanism retracts, the steel pipe clamp automatically releases the steel pipe pile, which improves the efficiency of steel pipe pile recovery.
[0019] 3) Both the upper and lower clamping blocks are equipped with V-shaped openings, which are suitable for use when recycling steel pipe piles of different diameters. The inner walls of both the upper and lower clamping blocks are equipped with anti-slip pads to ensure the stability of the clamping of the steel pipe piles by the upper and lower clamping blocks.
[0020] 4) The mounting base is rotatably connected to the base, and the mounting base is driven to rotate repeatedly on the base by a gear and rack mechanism. When the steel pipe is pulled out, it is repeatedly twisted, so that the steel pipe pile is pulled out in a spiral state, which reduces the difficulty of pulling out the steel pipe pile.
[0021] 5) The position of the hinge support on the mounting base is adjustable, so that when the upper clamping block clamps the steel pipe pile, the jacking mechanism has an "eight" shape structure, which decomposes the force of the jacking mechanism into an upward jacking force and a squeezing force towards the axis of the steel pipe pile, thus ensuring the stability of the steel pipe pile during jacking. Attached Figure Description
[0022] Appendix Figure 1 This is a diagram showing the usage status of a steel pipe pile recycling device according to this utility model.
[0023] Appendix Figure 2 This is an assembly diagram of the base, mounting bracket, and lifting mechanism.
[0024] Appendix Figure 3 This is a schematic diagram of the lower clamping block assembly.
[0025] Appendix Figure 4 This is a schematic diagram of a steel pipe clamp.
[0026] Appendix Figure 5 This is a schematic diagram of the mounting bracket.
[0027] Appendix Figure 6 This is a bottom view of the mounting bracket.
[0028] Appendix Figure 7 This is a schematic diagram of the base.
[0029] Appendix Figure 8 This is a bottom view of the base.
[0030] In the figure, 1, base; 11, through hole; 12, support leg; 13, arc-shaped sliding rail; 14, rack; 15, telescopic mechanism; 2, mounting seat; 21, hinged support; 22, adjusting screw; 23, fixed seat; 24, guide rod; 25, jacking screw; 26, lower clamping block; 27, sliding block; 28, sleeve; 29, gear ring; 3, jacking mechanism; 4, steel pipe clamp; 41, extrusion block; 42, guide groove; 43, pull rod; 44, support rod; 45, shaft sleeve; 46, spring; 47, upper clamping block; 48, guide rail. DETAILED DESCRIPTION
[0031] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings. Figures 1-8 It should be apparent that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0032] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0033] As shown in Figure 1 , Figure 2 A steel pipe pile recycling device, comprising a base 1, the lower part of the base 1 is provided with a support leg 12, the upper part of the base 1 is provided with a mounting seat 2, the mounting seat 2 is provided with a hinged support 21, the hinged support 21 is pivotally connected with a jacking mechanism 3, the upper end of the jacking mechanism 3 is provided with a steel pipe clamp 4 for clamping a steel pipe pile; the base 1 and the mounting seat 2 are provided with a through hole 11 in the middle, as shown in Figure 3 , Figure 5 As shown in
[0034] When the steel pipe pile is recovered, the recovery device is placed on the upper part of the steel pipe pile, the upper end of the steel pipe pile passes through the through hole 11, then the steel pipe clamp 4 is used to clamp the steel pipe pile, and then the jacking mechanism 3 is elongated upwards, so that the steel pipe pile is pulled out of the anchor hole by a distance, and the operation is repeated until the steel pipe pile is completely pulled out.
[0035] In the later stage of pulling out the steel pipe pile, when the friction between the anchor hole and the steel pipe pile is not enough to support the weight of the steel pipe pile, after the steel pipe pile is pulled out to a certain height, the jacking screw 25 is first rotated, the lower clamping block 26 is used to clamp the steel pipe pile, the steel pipe clamp 4 is loosened, the jacking mechanism 3 is reset, and the pulling out operation is repeated. The lower clamping block 26 avoids the falling of the steel pipe pile, and ensures the safety of the operator.
[0036] As shown in Figure 4 , the steel pipe clamp 4 comprises two symmetrically arranged extrusion blocks 41, the lower part of the extrusion block 41 is provided with a support rod 44, the outer part of the support rod 44 is provided with a shaft sleeve 45, the lower end of the shaft sleeve 45 is fixedly installed on the mounting seat 2, and the lower end of the support rod 44 is connected with the upper surface of the mounting seat 2 through a spring 46; the inner surface of the extrusion block 41 is provided with a guide groove 42, and the inner side of the extrusion block 41 is provided with an upper clamping block 47, as shown in Figure 2 , the contact surface of the extrusion block 41 and the upper clamping block 47 is an inclined surface, one side of the upper clamping block 47 is provided with a guide rail 48 in gap cooperation with the guide groove 42, and the lower part of the upper clamping block 47 is pivotally connected with the upper end of the jacking mechanism 3; when the jacking mechanism 3 is elongated, the upper clamping block 47 is driven to move upwards, and under the action of the inclined surfaces of the extrusion block 41 and the upper clamping block 47, the upper clamping blocks 47 on the two sides move towards the middle, and the steel pipe pile is automatically clamped; when the steel pipe pile is clamped, the jacking mechanism 3 continues to be elongated, the jacking force overcomes the combined force of the gravity of the extrusion block 41 and the elastic force of the spring 46 and other forces, so that the extrusion block 41 is pulled out a distance upwards with the steel pipe pile; when the jacking mechanism 3 is retracted, the upper clamping blocks 47 on the two sides move downwards while moving away from each other, and the steel pipe pile is loosened, so that the automatic clamping and loosening of the steel pipe clamp 4 is realized, and the efficiency of the steel pipe pile recovery is improved.
[0037] As shown in Figure 4 , a plurality of pull rods 43 are connected between the two extrusion blocks 41, so as to enhance the stability of the steel pipe clamp 4.
[0038] As shown in Figure 2 , Figure 3 , the upper clamping block 47 and the lower clamping block 26 are both provided with V-shaped openings, which are suitable for the recovery of steel pipe piles with different diameters; the inner walls of the upper clamping block 47 and the lower clamping block 26 are both provided with anti-skid pads, so as to ensure the stability of the clamping of the upper clamping block 47 and the lower clamping block 26 on the steel pipe pile.
[0039] Further, the leg 12 is threadedly connected with the base 1, facilitating adjustment of the support height of each leg 12 according to the construction environment, so as to ensure that the central axis of the through hole 11 coincides with the central axis of the steel pipe pile, reduce the resistance of the steel pipe pile pulling out, and avoid bending deformation of the steel pipe pile when pulling out.
[0040] As shown in Figure 1 , Figure 2 , the mounting seat 2 is fixedly connected with a sleeve 28 in the through hole 11, the sleeve 28 is rotationally connected with the base 1, and the bottom of the sleeve 28 is fixedly connected with a gear ring 29; the base 1 is fixedly installed with a telescopic mechanism 15 at the lower part, one end of the telescopic mechanism 15 is connected with a gear rack 14, the gear rack 14 is slidingly connected with the lower surface of the base 1, and the gear rack 14 is engaged with the gear ring 29; when the steel pipe pile is pulled out, the telescopic mechanism 15 reciprocatingly telescopes, drives the gear rack 14 to reciprocatingly telescope, and thus drives the mounting seat 2 to reciprocatingly rotate, so as to repeatedly twist the steel pipe pile when the steel pipe is pulled out, so that the steel pipe pile is in a spiral pulling-out state, and the difficulty of pulling out the steel pipe pile is further reduced.
[0041] The jacking mechanism 3 and the telescopic mechanism 15 adopt a hydraulic cylinder or an electric cylinder.
[0042] As shown in Figure 7 , the base 1 is provided with an arc-shaped sliding rail 13, and as shown in Figure 6 , the mounting seat 2 is provided with a plurality of sliding blocks 27 at the lower part, the sliding blocks 27 are slidingly installed on the arc-shaped sliding rail 13, the sliding blocks 27 increase the contact area of the mounting seat 2 and the base 1, and the stability of the mounting seat 2 is enhanced.
[0043] As shown in Figure 5 , the hinge support 21 is threadedly connected with an adjusting screw 22, both ends of the adjusting screw 22 are rotationally installed on a fixed plate, and the fixed plate is fixedly installed on the mounting seat 2; the position of the hinge support 21 on the mounting seat 2 is adjusted by rotating the adjusting screw 22, so that when the upper clamping block 47 clamps the steel pipe pile, the jacking mechanism 3 is in an "eight" shape structure, the acting force of the jacking mechanism 3 is decomposed into upward jacking force and extrusion force to the side of the central axis of the steel pipe pile, and the stability of the steel pipe pile during jacking is ensured.
[0044] The above content is only an example and description of the structure of the utility model, and those skilled in the art can make various modifications or supplements or adopt similar ways to replace the described specific embodiments, as long as the modifications or supplements or replacement do not deviate from the structure of the utility model or exceed the range defined by the present claim, and all of the above shall belong to the protection scope of the utility model.
Claims
1. A steel pipe pile recycling device, comprising a base, a support leg at the lower part of the base, a mounting seat at the upper part of the base, a hinge support on the mounting seat, a lifting mechanism pivotally connected to the hinge support, a steel pipe clamp at the upper end of the lifting mechanism for clamping the steel pipe pile; a through hole is provided in the middle of the base and the mounting seat, characterized in that... Two fixed seats are symmetrically installed on both sides of the mounting base. A lower clamping block is provided on one side of the fixed seat. A tightening screw is rotatably connected to one side of the lower clamping block. The tightening screw is threadedly connected to the fixed seat. Guide rods are provided on both sides of the tightening screw. One end of the guide rod is fixedly connected to the lower clamping block, and the guide rod is clearance-fitted with the fixed seat.
2. The steel pipe pile recycling device according to claim 1, characterized in that, The steel pipe clamp includes two symmetrically arranged extrusion blocks. The lower part of the extrusion block is provided with a support rod. A bushing is sleeved on the outside of the support rod. The lower end of the bushing is fixedly installed on the mounting base. A spring is connected between the lower end of the support rod and the upper surface of the mounting base. The inner surface of the extrusion block is provided with a guide groove. An upper clamping block is provided on the inner side of the extrusion block. The contact surface between the extrusion block and the upper clamping block is an inclined surface. A guide rail with clearance fit to the guide groove is provided on one side of the upper clamping block. The lower part of the upper clamping block is pivotally connected to the upper end of the lifting mechanism.
3. The steel pipe pile recycling device according to claim 2, characterized in that, Several tie rods connect the extrusion blocks on both sides.
4. A steel pipe pile recycling device according to claim 2, characterized in that, Both the upper and lower clamping blocks are provided with V-shaped openings, and both the upper and lower clamping blocks have anti-slip pads on their inner walls.
5. A steel pipe pile recycling device according to claim 1, characterized in that, The support leg is threadedly connected to the base.
6. A steel pipe pile recycling device according to claim 1, characterized in that, A sleeve is fixedly connected inside the through hole of the mounting base. The sleeve is rotatably connected to the base, and a toothed ring is fixedly connected to the bottom of the sleeve. A telescopic mechanism is fixedly installed on the lower part of the base. One end of the telescopic mechanism is connected to a rack. The rack is slidably connected to the lower surface of the base, and the rack meshes with the toothed ring.
7. A steel pipe pile recycling device according to claim 6, characterized in that, The lifting mechanism and telescopic mechanism are equipped with hydraulic cylinders or electric cylinders.
8. A steel pipe pile recycling device according to claim 6, characterized in that, The base is provided with an arc-shaped slide rail, and the lower part of the mounting base is provided with several sliders, which are slidably mounted on the arc-shaped slide rail.
9. A steel pipe pile recycling device according to claim 2, characterized in that, The hinge support is threaded with an adjusting screw. The two ends of the adjusting screw are rotatably mounted on the fixed plate. The fixed plate is fixedly mounted on the mounting base. When the upper clamping block clamps the steel pipe pile, the jacking mechanism has an "eight" shaped structure.