Portable lever hydraulic extractor

Abstract

This application relates to the field of power equipment hoisting technology, and provides a portable lever hydraulic puller, comprising: an adjustable clamp; a circular clamp disposed above the adjustable clamp; multiple telescopic support frames, one end of each telescopic support frame being hinged to the circular clamp, and the other end extending obliquely downward and supporting the ground; a fixing clamp disposed at the hinge between the telescopic support frame and the circular clamp; a hydraulic foot pump, the bottom of which has a fixing plate for fixing to the ground; a lifting hydraulic cylinder, the bottom of which is abutted against the fixing plate, and the top of which is connected to the adjustable clamp; and a high-pressure oil pipe, one end of which is connected to the oil outlet of the hydraulic foot pump, and the other end of which is connected to the oil inlet of the lifting hydraulic cylinder. Through the coordinated operation of the adjustable clamp, the circular clamp, the telescopic support frames, the hydraulic lifting system, and the auxiliary hook, multiple functions such as self-stabilizing support, hydraulic lifting and removal, and auxiliary hoisting are achieved.

Description

Technical Field

[0001] This application relates to the field of power equipment hoisting technology, and more specifically, to a portable lever hydraulic puller. Background Technology

[0002] Currently, during the construction and maintenance of power lines, it is often necessary to use underground corner stakes as temporary anchors for guy wires. After construction, if these stakes remain below the surface, they not only affect subsequent farming but also pose safety hazards such as tripping over pedestrians and livestock. Therefore, it is necessary to remove the remaining corner stakes or pole heads from the ground. In situations where there is no large machinery such as excavators at the construction site, or where large machinery cannot access the site due to narrow terrain or mud, existing methods rely primarily on manual removal using simple tools such as lifting bars and ropes, resulting in extremely low work efficiency and high labor intensity. Furthermore, while some existing small hoisting or lifting devices (such as hand-operated hoists with tripods) can provide some lifting force, their structural stability is poor. During lifting, the stakes are prone to swaying and tilting, increasing the difficulty of removal and potentially causing the device to overturn due to lateral forces, posing serious safety hazards. At the same time, these devices usually require external fixed points for support, making them unusable in open fields or construction sites where no fixed points are available, thus limiting their versatility. Some devices that use hydraulic jacks have a hydraulic pump and actuator cylinder that are often integrated into one unit. This requires the operator to be close to the object being pulled, resulting in limited working space and inconvenient operation. Summary of the Invention

[0003] This application aims to at least address the technical problems in the related technologies, such as the low efficiency, high labor intensity, and safety hazards of traditional manual removal methods when removing buried columnar bodies in construction sites where large machinery cannot enter or reach, and the fact that existing small hoisting devices rely on external fixed points for support, cannot be used in open areas, and the pile body is prone to swinging and tilting during the removal process, causing the device to overturn, resulting in difficulties in carrying out the removal operation smoothly, high operational risks, and poor site adaptability.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows: This application provides a portable lever hydraulic extractor for removing a columnar object buried in the ground, comprising: an adjustable clamp for gripping the outer peripheral wall of the columnar object; a circular clamp positioned above the adjustable clamp, through which the columnar object passes without contacting the circular clamp during upward extraction; multiple telescopic support frames, each with one end hinged to the circular clamp and the other end extending diagonally downward and supported on the ground, the multiple telescopic support frames being spaced apart circumferentially along the circular clamp to form a triangular stable structure; and a fixing clamp positioned on the telescopic support frame. The hinge between the support frame and the circular clamp is used to lock the connection angle between the telescopic support frame and the circular clamp; the hydraulic foot pump has a fixing plate at its bottom for fixing to the ground; the lifting hydraulic cylinder has its cylinder bottom connected to the fixing plate, and its piston rod top connected to the adjustable clamp; the high-pressure oil pipe has one end connected to the oil outlet of the hydraulic foot pump and the other end connected to the oil inlet of the lifting hydraulic cylinder; when the hydraulic foot pump is stepped on, the high-pressure hydraulic oil drives the piston rod to extend, providing an upward pulling force to the adjustable clamp to pull the columnar body out of the ground.

[0005] This application provides a portable lever hydraulic puller, which achieves multiple functions such as self-stabilizing support, hydraulic lifting and removal, and auxiliary lifting through the coordinated operation of an adjustable clamp, a circular clamp, a telescopic support frame, a hydraulic jacking system, and an auxiliary hook.

[0006] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description

[0007] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a front view schematic diagram of a portable lever hydraulic puller according to an embodiment of this application; Figure 2 This is a side view of a portable lever hydraulic extractor according to an embodiment of this application; Figure 3 This is a top view of a portable lever hydraulic extractor according to an embodiment of this application.

[0008] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1. Portable lever hydraulic puller, 100. Adjustable clamp, 110. First arc-shaped gripper, 120. Second arc-shaped gripper, 130. Handwheel screw, 140. Anti-slip layer, 141. Rubber pad, 142. Serrated steel sheet, 200. Circular clamp, 300. Telescopic support frame, 310. Outer tube, 320. Inner rod, 330. Locking device, 340. Mounting foot pad, 400. Fixing clamp, 500. Hydraulic foot pump, 510. Fixing plate, 520. Return valve, 600. Lifting hydraulic cylinder, 610. Cylinder body, 620. Piston rod, 630. Ball joint, 700. High-pressure oil pipe, 800. Hook, 810. Wire rope, 900. Column, 910. Ground. Detailed Implementation

[0009] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0010] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0011] The following reference Figures 1 to 3 This application describes a portable lever hydraulic puller provided according to some embodiments.

[0012] like Figure 1 , Figure 2 and Figure 3As shown, one embodiment of this application provides a portable lever hydraulic puller 1 for removing a columnar body 900 buried in the ground 910. The puller includes: an adjustable clamp 100 for gripping the outer peripheral wall of the columnar body 900; a circular clamp 200 positioned above the adjustable clamp 100, through which the columnar body 900 passes without contacting the circular clamp 200 during upward removal; multiple telescopic support frames 300, each with one end hinged to the circular clamp 200 and the other end extending obliquely downwards and supporting the ground 910, the multiple telescopic support frames 300 being spaced apart circumferentially along the circular clamp 200 to form a triangular stable structure; and a fixing clip 400 disposed on the telescopic support frame. The hinge between the telescopic support frame 300 and the circular clamp 200 is used to lock the connection angle between the telescopic support frame 300 and the circular clamp 200; the hydraulic foot pump 500 has a fixing plate 510 at its bottom for fixing to the ground 910; the lifting hydraulic cylinder 600 has its cylinder body 610 bottom abutting against the fixing plate 510, and the piston rod 620 top of the lifting hydraulic cylinder 600 is connected to the adjustable clamp 100; the high-pressure oil pipe 700 has one end connected to the oil outlet of the hydraulic foot pump 500 and the other end connected to the oil inlet of the lifting hydraulic cylinder 600; when the hydraulic foot pump 500 is stepped on, the high-pressure hydraulic oil drives the piston rod 620 to extend, providing an upward pulling force to the adjustable clamp 100 to pull the column 900 out of the ground 910.

[0013] Specifically, such as Figure 1 , Figure 2 and Figure 3As shown, the portable lever hydraulic extractor 1 provided in the embodiments of this application is used to remove a columnar body 900 buried in the ground 910. The portable lever hydraulic extractor 1 includes an adjustable clamp 100, a circular clamp 200, multiple telescopic support frames 300, a fixing clamp 400, a hydraulic foot pump 500, a lifting hydraulic cylinder 600, and a high-pressure oil pipe 700. The adjustable clamp 100 is used to grip the outer peripheral wall of the columnar body 900, clamping it securely. The circular clamp 200 is positioned above the adjustable clamp 100. When the columnar body 900 is pulled upwards, it passes through the central space of the circular clamp 200 without contacting it, thus avoiding obstructing the removal and movement of the columnar body 900 and saving operating space. Each of the multiple telescopic support frames 300 has one end hinged to a circular clamp 200, and the other end extends diagonally downwards and is supported on the ground 910. The multiple telescopic support frames 300 are distributed circumferentially along the circular clamp 200 to form a triangular stable structure, effectively counteracting the swaying and tilting forces of the pile and ensuring the stability of the pile during vertical extraction. A fixing clamp 400 is installed at the hinge between the telescopic support frame 300 and the circular clamp 200 to lock the connection angle between them, facilitating adjustment of the support angle of the telescopic support frame 300. It can be understood that the circular clamp 200 is similar to a circular track, with one end of the telescopic support frame 300 movably connected to the circular clamp 200 and the other end retractably supported on the ground 910. The columnar body 900 of the corner pile or residual pole head to be hoisted can pass through the circular clamp 200 during the hoisting process. The bottom of the hydraulic foot pump 500 is equipped with a fixing plate 510 for fixing to the ground 910, providing bottom support for the lifting hydraulic cylinder 600. The bottom of the cylinder body 610 of the lifting hydraulic cylinder 600 is in contact with the fixing plate 510, and the top of the piston rod 620 of the lifting hydraulic cylinder 600 is connected to the adjustable clamp 100 to pull out the corner stake or pole head through the extension and retraction of the piston rod 620. One end of the high-pressure oil pipe 700 is connected to the oil outlet of the hydraulic foot pump 500, and the other end is connected to the oil inlet of the lifting hydraulic cylinder 600, providing power output to the piston rod 620 of the lifting hydraulic cylinder 600. When the hydraulic foot pump 500 is stepped on, the high-pressure hydraulic oil drives the piston rod 620 to extend, providing an upward pulling force to the adjustable clamp 100 to pull the column 900 out of the ground 910.

[0014] Thus, the portable lever hydraulic puller 1 provided in this application uses an adjustable clamp 100 to hold the cylindrical body 900, and a circular clamp 200 and multiple telescopic support frames 300 hinged to it to form an independent triangular stable structure, achieving stable support of the device without relying on any external fixing points. Simultaneously, a split hydraulic system is adopted, where a foot-operated hydraulic pump 500 drives high-pressure hydraulic oil through a high-pressure oil pipe 700 into a lifting hydraulic cylinder 600, causing the piston rod 620 to extend and directly lift the cylindrical body 900 connected to the adjustable clamp 100, converting hydraulic energy into a continuous and controllable upward pulling force. This technical solution utilizes hydraulic transmission to provide a large-tonnage pulling force, replacing the traditional purely manual pulling method, effectively reducing labor intensity; the triangular stable structure ensures the verticality of the cylindrical body 900 during the pulling process, preventing swaying and tilting, and improving operational safety; furthermore, the hydraulic foot-operated pump 500 and the lifting hydraulic cylinder 600 are separately set up, allowing the operator to control them remotely, making the work space more adaptable.

[0015] Compared with existing technologies, the portable lever hydraulic puller 1 provided in this application has the following advantages: First, it does not rely on external fixing points and has strong self-stability. Through the triangular stabilizing structure formed by the circular clamp 200 and multiple telescopic support frames 300, the device can be independently supported on the ground 910, regardless of whether there are utility poles, trees, or other supports at the construction site. It can operate normally in complex terrains such as open fields and muddy construction sites, significantly improving site adaptability. Second, it has a large and controllable pulling force and low labor intensity. Adopting a split hydraulic system consisting of a hydraulic foot pump 500 and a lifting hydraulic cylinder 600, a large-tonnage pulling force can be generated simply by stepping on the pedal, completely replacing purely physical labor methods such as manual lifting and rope pulling. Simultaneously, the return valve 520 allows for precise fine-tuning of the lifting height, making operation labor-saving, accurate, and efficient. Third, it is safe and reliable in operation, preventing the pile from tilting. The triangular stabilizing structure effectively counteracts the lateral sway and tilting force of the column 900 during the removal process, ensuring vertical removal. Furthermore, the central space of the circular clamp 200 allows the column 900 to pass through without contacting it, serving both a guiding and limiting function and avoiding frictional resistance, further enhancing the stability and safety of the removal operation.

[0016] Specifically, during the construction and maintenance of power lines, it is often necessary to remove driven stakes (used as temporary guy wire anchors) and residual pole heads from the ground. If these stakes remain below ground after construction, they not only affect subsequent farming but also pose safety hazards such as tripping over pedestrians and livestock. In-depth research into the on-site working environment has revealed that in situations where large machinery such as excavators is unavailable, or where large machinery cannot access the site due to narrow, muddy terrain, existing methods rely primarily on manual labor using simple tools such as lifting bars and ropes for removal. This results in extremely low work efficiency and immense labor intensity. Furthermore, while some existing small hoisting or lifting devices (such as hand-operated hoists with tripods) can provide some lifting force, their structural stability is poor. During lifting, the stakes are prone to swaying and tilting, increasing the difficulty of removal and potentially causing the device to overturn due to lateral forces, posing serious safety hazards. Meanwhile, these devices typically require external anchor points (such as nearby utility poles or trees) for support, rendering them unusable in open fields or construction sites where no anchor points are available, thus limiting their versatility. Some devices employing hydraulic jacks often have a single integrated hydraulic pump and actuator, requiring the operator to be close to the object being pulled, resulting in limited working space and inconvenient operation. Therefore, there is an urgent need for a portable lever-type hydraulic puller that requires no large machinery, does not rely on external anchor points, provides stable and controllable pulling force, and maintains the pile's verticality during removal, preventing tilting and swaying. This would improve the efficiency, safety, and site adaptability of removal operations.

[0017] To address the shortcomings of existing technologies, such as Figure 1 , Figure 2 and Figure 3As shown, the portable lever hydraulic puller 1 provided in this application achieves multiple functions of self-stabilizing support, hydraulic lifting and removal, and auxiliary lifting through the coordinated operation of the adjustable clamp 100, the circular clamp 200, the telescopic support frame 300, the hydraulic jacking system, and the auxiliary hook 800. Specifically, in the self-stabilizing support scenario, the circular clamp 200 serves as a fixed platform, with multiple telescopic support frames 300 distributed circumferentially and hinged to it. The other end of the telescopic support frame 300 extends obliquely downward to support the ground 910, forming an independent triangular stable structure that does not rely on any external fixing points. Moreover, the length of the telescopic support frame 300 is adjustable, which can adapt to different heights and different ground 910 flatnesses. After the fixing clamp 400 locks the connection angle, it effectively counteracts the swing and tilting force of the pile during the removal process, ensuring the stability of the pile being pulled out vertically, and solving the problem of existing devices relying on external support and being prone to overturning. In the hydraulic lifting and extraction scenario, stepping on the hydraulic foot pump 500 causes high-pressure hydraulic oil to drive the piston rod 620 of the lifting hydraulic cylinder 600 to extend through the high-pressure oil pipe 700. The top of the piston rod 620 directly lifts the adjustable clamp 100 that is tightly gripping the pile body, providing a continuous, controllable, and high-tonnage upward pulling force to the pile body. Moreover, the hydraulic foot pump 500 and the lifting hydraulic cylinder 600 are set separately, allowing the operator to control them remotely by stepping on them, freeing up their hands. At the same time, the return oil valve 520 can achieve precise fine-tuning of the lifting height and pressure relief and reset, completely replacing the inefficient and laborious manual extraction method, which is especially suitable for piles with large burial depth and compacted soil. In assisted lifting scenarios, when the site is open or the pile is heavy, the hook 800 is connected to the adjustable clamp 100 and external lifting equipment, such as a hand-operated hoist or electric winch, via the wire rope 810 to provide auxiliary upward pulling force. This force works in conjunction with the pulling force of the hydraulic jacking system to form a dual-mode collaborative operation of "lifting up + jacking down". This further reduces the requirement for a single power source and improves the flexibility and reliability of the operation.

[0018] In specific applications, the portable lever hydraulic puller 1 provided in this application is a vertical hoisting device suitable for the power industry. Its function is to remove corner piles and residual pole heads, thereby improving work efficiency. This device, through the combination of multiple technologies such as adjustable clamps 100, triangular supports, and hydraulic power, can quickly remove corner piles and residual pole heads without requiring workers to bear a heavy workload, and greatly improves work efficiency, effectively solving the problem of piles left in the ground.

[0019] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3As shown, the adjustable clamp 100 includes: a first arc-shaped clamp 110; a second arc-shaped clamp 120, the second arc-shaped clamp 120 being disposed opposite to the first arc-shaped clamp 110, the first arc-shaped clamp 110 and the second arc-shaped clamp 120 together forming a clamping space for accommodating the columnar body 900; and a handwheel screw 130, the handwheel screw 130 being connected to the first arc-shaped clamp 110 and the second arc-shaped clamp 120, for adjusting the radial dimension of the clamping space.

[0020] Specifically, such as Figure 1 , Figure 2 and Figure 3 As shown, the adjustable clamp 100 includes a first arc-shaped clamp 110, a second arc-shaped clamp 120, and a handwheel screw 130. The second arc-shaped clamp 120 is positioned opposite the first arc-shaped clamp 110, and together they form a clamping space for accommodating a columnar body 900, specifically a corner post or pole head. The handwheel screw 130 connects the first arc-shaped clamp 110 and the second arc-shaped clamp 120. By rotating the handwheel screw 130, the relative distance between the first arc-shaped clamp 110 and the second arc-shaped clamp 120 can be adjusted, thereby changing the radial dimension of the clamping space to accommodate columnar bodies 900 of different diameters. In this way, the operator only needs to rotate the handwheel screw 130 according to the actual diameter of the column 900 to be removed to quickly complete the clamping or loosening operation of the clamp. This achieves universal clamping for column 900 of different specifications, avoiding the trouble of changing different clamps for piles of different diameters. At the same time, the self-locking characteristic of the handwheel screw 130 can maintain a constant clamping force, preventing the clamp from loosening due to vibration or force during the removal process, thus ensuring the reliability of clamping and the continuity of operation.

[0021] In specific applications, there may be multiple adjustable clamps 100. Multiple adjustable clamps 100 are spaced apart along the axial direction of the column 900. This arrangement is to improve the stability and reliability of clamping. The number of adjustable clamps 100 can be set according to the actual use, and will not be listed here.

[0022] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the adjustable clamp 100 also includes an anti-slip layer 140 disposed on the inner side of the first arc-shaped gripper 110 and the second arc-shaped gripper 120. The anti-slip layer 140 includes a rubber pad 141 and a serrated steel sheet 142 embedded in the rubber pad 141.

[0023] Specifically, such as Figure 1 , Figure 2 and Figure 3As shown, the adjustable clamp 100 also includes an anti-slip layer 140 disposed inside the first arc-shaped gripper 110 and the second arc-shaped gripper 120. The anti-slip layer 140 includes a rubber pad 141 and a serrated steel plate 142 embedded in the rubber pad 141. The rubber pad 141 directly contacts the outer peripheral wall of the columnar body 900, using the high coefficient of friction of the rubber material to provide an initial anti-slip effect. At the same time, the elastic deformation capacity of the rubber allows the gripper to fit more tightly with the surface of the columnar body 900, avoiding uneven clamping force caused by the unevenness of the surface of the columnar body 900. The serrated steel plate 142 embedded in the rubber pad 141 is partially exposed after the rubber pad 141 is deformed by pressure or works together with the rubber pad 141 to further increase the biting force and anti-slip capability with the surface of the columnar body 900. In this way, the composite anti-slip structure of the rubber pad 141 and the serrated steel plate 142 significantly improves the friction and gripping force between the adjustable clamp 100 and the column 900 without damaging the surface of the column 900. Even if there is a large vibration or force fluctuation during the removal process, it can effectively prevent relative sliding between the clamp and the column 900, ensuring the stable transmission of the removal force and the reliability of the operation.

[0024] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the telescopic support frame 300 includes: an outer tube 310, one end of which is hinged to a circular clamp 200; an inner rod 320, which is slidably disposed within the outer tube 310; and a locking member 330, which is disposed on the outer tube 310 and is used to lock the inner rod 320 in the extended or retracted position.

[0025] Specifically, such as Figure 1 , Figure 2 and Figure 3As shown, the telescopic support frame 300 includes an outer tube 310, an inner rod 320, and a locking element 330. One end of the outer tube 310 is hinged to a circular clamp 200, allowing the entire telescopic support frame 300 to rotate relative to the circular clamp 200 in a vertical plane, facilitating deployment or retraction for carrying. The inner rod 320 is slidably disposed within the outer tube 310. The relative sliding between the inner and outer tubes 310 allows for adjustment of the total length of the telescopic support frame 300, adapting to the removal height requirements of different columnar objects 900 and the support length requirements under varying ground flatness conditions. The locking element 330 is disposed on the outer tube 310 and is used to lock the inner rod 320 in the extended or retracted position, preventing accidental sliding of the inner rod 320 relative to the outer tube 310 during removal, which could lead to changes in support height or structural instability. In this way, operators can flexibly adjust the support angle and support length of each telescopic support frame 300 according to the actual terrain conditions of the construction site and the burial depth of the column 900, and reliably fix it with locking parts 330, so that the bottom of each telescopic support frame 300 can be firmly supported on the ground 910, ensuring the effectiveness of the triangular stability structure and the safety of the removal operation; at the same time, in the non-working state, the inner rod 320 can be retracted into the outer sleeve 310 and each telescopic support frame 300 can be folded up, which greatly reduces the storage volume of the device and facilitates transportation and carrying.

[0026] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, there are three telescopic support frames 300, which are evenly spaced along the circumference of the circular clamp 200.

[0027] Specifically, such as Figure 1 , Figure 2 and Figure 3As shown, there are three telescopic support frames 300, evenly spaced along the circumference of the circular clamp 200. That is, the angle between any two adjacent telescopic support frames 300 is 120 degrees. Thus, the bottom ends of the three telescopic support frames 300 and the three support points on the ground 910 form an equilateral triangle support area, with the center of the circular clamp 200 located at the centroid of this triangle. This three-point evenly distributed structure is one of the most stable and economical support forms in engineering mechanics. It can evenly distribute the downward vertical reaction force and lateral tilting moment generated during the removal process to each telescopic support frame 300, avoiding overloading of a single support frame or overturning of the entire device due to uneven force distribution. Simultaneously, the three-point support has good self-leveling characteristics; even if there are slight uneven areas on the ground, the three telescopic support frames 300 can adapt by independently adjusting their lengths without the need for additional auxiliary supports. Thus, this application uses three evenly spaced telescopic support frames 300, which achieves the simplification of structure and the lightest weight while ensuring sufficient support stability. This facilitates rapid deployment and storage on site, while ensuring the overall rigidity and anti-overturning ability of the device during the removal operation.

[0028] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the telescopic support frame 300 also includes: mounting pads 340, which are hinged to the end of the inner rod 320 away from the outer sleeve 310, so that the mounting pads 340 can swing relative to the inner rod 320 to adapt to different slopes of the ground 910, and the ground contact area of ​​the mounting pads 340 is larger than the cross-sectional area of ​​the inner rod 320.

[0029] Specifically, such as Figure 1 , Figure 2 and Figure 3As shown, the telescopic support frame 300 also includes mounting pads 340. These mounting pads 340 are hinged to the end of the inner rod 320 furthest from the outer sleeve 310, allowing them to swing freely within a certain angle range relative to the inner rod 320. Simultaneously, the ground contact area of ​​the mounting pads 340 is designed to be larger than the cross-sectional area of ​​the inner rod 320. Thus, when the telescopic support frame 300 is supported on uneven ground 910 or a slope, the mounting pads 340 can adaptively swing with changes in the slope of the ground 910, ensuring that the bottom surface of the mounting pads 340 maintains maximum contact with the ground 910, preventing sinking or slippage caused by point or line contact when the end of the inner rod 320 directly contacts the ground. Furthermore, the increased ground contact area effectively disperses the pressure transmitted from the telescopic support frame 300 to the ground 910, reducing the pressure per unit area and preventing excessive sinking on soft, muddy ground. It also further increases the frictional resistance of the support, improving the overall stability of the device. In this way, by combining the hinged mounting foot pad 340 with the large-area grounding design, the portable lever hydraulic puller 1 provided in this application can be stably supported on construction sites with different slopes and soil types, such as hard roads, soft soil, and gravel surfaces, which significantly enhances the device's adaptability to complex terrain and ensures the reliability and safety of the support system during the pull-out operation.

[0030] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the bottom of the cylinder body 610 of the lifting hydraulic cylinder 600 is connected to the fixed plate 510 via a ball joint 630, so that the extension direction of the piston rod 620 can be adaptively adjusted.

[0031] Specifically, such as Figure 1 , Figure 2 and Figure 3As shown, the bottom of the cylinder body 610 of the lifting hydraulic cylinder 600 is abutted against the fixed plate 510 via a ball joint 630. The ball joint 630 is a connection structure that allows for multi-directional rotation, enabling the cylinder body 610 to swing at a certain angle relative to the fixed plate 510 in any direction. Thus, in actual use, if the ground 910 is uneven, the clamping center of the adjustable clamp 100 and the column 900 is not perfectly aligned with the axis of the lifting hydraulic cylinder 600, or the column 900 is slightly tilted due to uneven force during removal, the ball joint 630 can automatically adjust the angle of the cylinder body 610 to ensure that the extension direction of the piston rod 620 is always consistent with the force direction of the adjustable clamp 100, thus avoiding bending of the piston rod 620 or damage to the cylinder body 610 due to uneven load. Meanwhile, the ball joint 630 structure transmits only axial thrust and not bending moment, allowing the lifting hydraulic cylinder 600 to bear only compressive loads during operation. This fully leverages the linear lifting advantage of the hydraulic cylinder, improving the service life and operational reliability of the hydraulic system. Furthermore, through the adaptive adjustment function of the ball joint 630, this application effectively reduces the requirements for centering accuracy at the construction site, simplifies the installation and commissioning process, and ensures stable output of the lifting hydraulic cylinder 600 under various working conditions, further enhancing the smoothness and safety of the removal operation.

[0032] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the hydraulic foot pump 500 is also equipped with a return oil valve 520. When the return oil valve 520 is opened, the hydraulic oil in the lifting hydraulic cylinder 600 flows back to the hydraulic foot pump 500, and the piston rod 620 retracts under the action of gravity or external force.

[0033] Specifically, such as Figure 1 , Figure 2 and Figure 3As shown, the hydraulic foot pump 500 is also equipped with a return valve 520. During normal lifting operations, the return valve 520 is closed, and hydraulic oil is pumped unidirectionally to the inlet of the lifting hydraulic cylinder 600, pushing the piston rod 620 out. When it is necessary to retract the piston rod 620 for device removal or the next removal operation, the operator can manually open the return valve 520. At this time, the high-pressure hydraulic oil in the lifting hydraulic cylinder 600 flows back to the oil tank of the hydraulic foot pump 500 through the high-pressure oil pipe 700 under the action of pressure difference. The pressure in the lifting hydraulic cylinder 600 drops rapidly, and the piston rod 620 retracts smoothly under its own weight or external downward pressure. Thus, by setting the return valve 520, rapid depressurization and automatic reset of the lifting hydraulic cylinder 600 are achieved without the need for an additional reverse hydraulic circuit, simplifying the structure and operation of the hydraulic system. Operators only need to turn or press the return valve 520 to control the retraction of the piston rod 620. The operation is simple and quick, which significantly improves the continuity and efficiency of the removal operation. It also facilitates the storage and transportation of the device when it is not in operation.

[0034] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, it also includes: a hook 800, which is connected to an adjustable clamp 100 via a flexible connector. The hook 800 is used to connect to external lifting equipment to provide an auxiliary upward pulling force to the adjustable clamp 100 or the column 900. The auxiliary pulling force works in conjunction with the pulling force provided by the lifting hydraulic cylinder 600 to pull the column 900 out of the ground.

[0035] Specifically, such as Figure 1 , Figure 2 and Figure 3As shown in the embodiment of this application, the portable lever hydraulic puller 1 also includes a hook 800. The hook 800 is connected to the adjustable clamp 100 via a flexible connector. The flexible connector may specifically include, for example, a wire rope, chain, or high-strength nylon strap. The other end of the hook 800 is used to connect to external lifting equipment, such as a hand chain hoist or electric winch. During the pull-out operation, when encountering a column 900 that is heavy, deeply buried, or has high soil resistance, or when a single stroke of the lifting hydraulic cylinder 600 is insufficient to completely pull out the column 900, the operator can simultaneously activate the lifting hydraulic cylinder 600 and the external lifting equipment: the lifting hydraulic cylinder 600 provides an upward lifting force to the adjustable clamp 100 through the piston rod 620, while the external lifting equipment applies an auxiliary upward pulling force to the adjustable clamp 100 or directly to the column 900 through the hook 800 and the flexible connector. These two pulling forces work synergistically on the adjustable clamp 100, forming a dual force application scheme of "bottom lifting + top pulling," which significantly increases the upward resultant force borne by the column 900, thereby more effectively overcoming the soil's adhesion and friction. Thus, the introduction of the hook 800 reduces the large tonnage requirement of the single power source of the lifting hydraulic cylinder 600, making it more widely applicable. Furthermore, when the stroke of the lifting hydraulic cylinder 600 is insufficient or when continuous pulling force is required, external lifting equipment can bear part of the load or continue the lifting, realizing dual-mode collaborative operation of hydraulic lifting and mechanical lifting. This significantly improves the operational capacity, adaptability to working conditions, and operational flexibility of the removal device, ensuring efficient and reliable removal of the column 900 under various complex construction conditions.

[0036] In some embodiments, optionally, such as Figure 1 , Figure 2 and Figure 3 As shown, the hook 800 is connected to the adjustable clamp 100 via the wire rope 810, and the external lifting equipment is a hand-operated hoist or an electric winch.

[0037] Specifically, such as Figure 1 , Figure 2 and Figure 3As shown, the hook 800 is connected to the adjustable clamp 100 via a wire rope 810. The external lifting equipment is either a manual chain hoist or an electric winch. The wire rope 810 features high strength, good flexibility, wear resistance, and corrosion resistance, reliably transmitting significant tensile force while allowing for flexible arrangement and adjustment of the lifting direction on the construction site. The manual chain hoist is a manually operated lifting device that uses chain drive to raise and lower heavy objects without external power, making it particularly suitable for outdoor construction environments without electricity. The electric winch, driven by a motor, provides continuous and stable lifting force, suitable for lifting heavy objects or maintaining tension for extended periods. Operators can choose between a manual chain hoist or an electric winch as the external lifting equipment based on the actual conditions of the construction site, such as the availability of power, the weight of the column 900, and the required removal speed. In this way, by reliably connecting the hook 800 to the adjustable clamp 100 through the wire rope 810, and by providing auxiliary pulling force with a hand-operated hoist or electric winch, this application realizes the rapid docking and collaborative operation between the lifting hydraulic cylinder 600 and external lifting equipment. It retains the portability and adaptability of manual operation, and can improve the efficiency of operation through electric means, meeting the diverse needs under different construction conditions, and further enhancing the practicality and flexibility of the device.

[0038] In the description of this application, the term "multiple" refers to two or more. Unless otherwise expressly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0039] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A portable lever-operated hydraulic extractor for removing columnar objects buried in the ground, characterized in that, include: An adjustable clamp, which is used to hold the outer peripheral wall of the columnar body tightly; A circular clamp is positioned above the adjustable clamp. When the columnar body is pulled upwards, it passes through the central space of the circular clamp without contacting it. Multiple telescopic support frames, one end of each telescopic support frame is hinged to the circular clamp, and the other end extends obliquely downward and is supported on the ground. The multiple telescopic support frames are distributed at intervals along the circumference of the circular clamp to form a triangular stable structure. A fixing clip is provided at the hinge of the telescopic support frame and the circular clamp, and is used to lock the connection angle between the telescopic support frame and the circular clamp; A hydraulic foot pump, wherein the bottom of the hydraulic foot pump is provided with a fixing plate for fixing to the ground; A lifting hydraulic cylinder, wherein the bottom of the cylinder body of the lifting hydraulic cylinder is abutted against the fixed plate, and the top of the piston rod of the lifting hydraulic cylinder is connected to the adjustable clamp; A high-pressure oil pipe, one end of which is connected to the oil outlet of the hydraulic foot pump, and the other end of which is connected to the oil inlet of the lifting hydraulic cylinder; When the hydraulic foot pump is stepped on, the high-pressure hydraulic oil drives the piston rod to extend, providing an upward pulling force to the adjustable clamp to pull the columnar body out of the ground.

2. The portable lever hydraulic puller according to claim 1, characterized in that, The adjustable clamp includes: First arc-shaped gripper; The second arc-shaped gripper is disposed opposite to the first arc-shaped gripper, and the first arc-shaped gripper and the second arc-shaped gripper together form a clamping space for accommodating the columnar body; A handwheel screw, which connects the first arc-shaped jaw and the second arc-shaped jaw, is used to adjust the radial dimension of the clamping space.

3. The portable lever hydraulic puller according to claim 2, characterized in that, The adjustable clamp also includes an anti-slip layer disposed on the inner side of the first arc-shaped gripper and the second arc-shaped gripper, the anti-slip layer comprising a rubber pad and a serrated steel sheet embedded in the rubber pad.

4. The portable lever hydraulic puller according to claim 1, characterized in that, The telescopic support frame includes: An outer tube, one end of which is hinged to the circular clamp; Inner rod, the inner rod being slidably disposed within the outer sleeve; and A locking element, which is disposed on the outer sleeve, is used to lock the inner rod in the extended or retracted position.

5. The portable lever hydraulic puller according to claim 4, characterized in that, The number of telescopic support frames is three, and the three telescopic support frames are evenly spaced along the circumference of the circular clamp.

6. The portable lever hydraulic puller according to claim 4, characterized in that, The telescopic support frame also includes: Mounting pads are hinged to the end of the inner rod away from the outer tube, allowing the mounting pads to swing relative to the inner rod to adapt to different ground slopes, and the ground contact area of ​​the mounting pads is larger than the cross-sectional area of ​​the inner rod.

7. The portable lever hydraulic puller according to claim 1, characterized in that, The bottom of the lifting hydraulic cylinder is connected to the fixed plate via a ball joint, so that the extension direction of the piston rod can be adaptively adjusted.

8. The portable lever hydraulic puller according to claim 1, characterized in that, The hydraulic foot pump is also equipped with a return valve. When the return valve is opened, the hydraulic oil in the lifting hydraulic cylinder flows back to the hydraulic foot pump, and the piston rod retracts under the action of gravity or external force.

9. The portable lever hydraulic puller according to claim 1, characterized in that, Also includes: The hook is connected to the adjustable clamp via a flexible connector. The hook is used to connect to external lifting equipment to provide an auxiliary upward pulling force to the adjustable clamp or the column. The auxiliary pulling force works in conjunction with the pulling force provided by the lifting hydraulic cylinder to pull the column from the ground.

10. The portable lever hydraulic puller according to claim 9, characterized in that, The hook is connected to the adjustable clamp via a wire rope, and the external lifting equipment is a hand-operated hoist or an electric winch.

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