A Plugging and Unplugging Equipment for a Pin of a Hydraulic Lifting System and Its Usage Method

Abstract

The present invention discloses a plugging and unplugging device and a usage method for a hydraulic lifting system pin, including a ring beam and a controller. The ring beam surrounds the leg. At the middle position inside the ring beam, a pin that cooperates with the leg is sleeved. On both sides of the bottom of the ring beam, hinge seats are provided, and hydraulic jacks are hinged inside the two groups of hinge seats. Through the mutual cooperation of the fixed plugging and unplugging components of the present invention, when the pin cannot be pulled out due to reasons such as the inclination of the ring beam, the bolt can be threadedly fixed with the threaded hole to form a connection and cooperation between the main bracket and the pin cover. At this time, the hydraulic jack can be started to lift the main bracket, forcing the pin to be pulled out of the inside of the leg and the ring beam. This device can be applied to most hydraulic pin-type lifting systems, ensuring the convenience and operability of the device during maintenance and repair work during the lifting and lowering process of the platform or the leg.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic lifting systems, and specifically to a plugging and unplugging device and a usage method for a plug of a hydraulic lifting system. Background Art

[0002] Common hydraulic plug-type lifting platforms mainly include pile legs, a platform, and a hydraulic plug lifting system. The hydraulic plug lifting system includes a cylinder that drives the platform to lift and a hydraulic device that provides power for the cylinder. The platform is supported by at least three pile legs. Usually, a set of hydraulic devices is correspondingly provided on one pile leg, and the hydraulic device provides power for the lifting of its corresponding pile leg. When a hydraulic device corresponding to one pile leg fails, the corresponding pile leg loses power, resulting in the suspension of the lifting operation.

[0003] When the current hydraulic lifting system is in operation, the movement trajectories between system components may be asynchronous, resulting in position offsets. As a result, the plug may get stuck in the gap between the ring beam and the pile leg, preventing the components from operating normally. At this time, the plug needs to be pulled out. However, it is extremely difficult to pull out a stuck plug, and there is no good force application point for the operator to hold, increasing the inconvenience of device maintenance and repair. If the plug is forcibly pulled out from the pile leg, the plug may be damaged due to uneven stress during plugging and unplugging, further increasing the difficulty coefficient of component maintenance. In addition, when the plug is stuck in a moving state, the stuck angle changes with the movement of the device, and the operator needs to finely adjust the pulling angle of the plug. However, the existing structure does not have an operation method that allows the operator to finely adjust the angle of the plug, making it difficult to minimize the damage to the components and ensure the stability of plug detachment. Summary of the Invention

[0004] The purpose of the present invention is to provide a plugging and unplugging device and a usage method for a plug of a hydraulic lifting system to solve the related problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: It includes a ring beam and a controller. The ring beam surrounds the pile leg. At the middle position inside the ring beam, a plug that cooperates with the pile leg is sleeved. On both sides of the bottom of the ring beam, there are hinge seats. Inside the two hinge seats, a hydraulic jack is hinged. At the output ends of the two hydraulic jacks, there is a main bracket connected to each other. On both sides inside the main bracket, there are slide rails. At one end of the back of the two hydraulic jacks, there is a guide groove. Inside the two guide grooves, there are guide blocks that cooperate with each other. On both sides at one end of the bottom of the ring beam, there is a fine-tuning inclination component. On both sides inside the two slide rails, there are sliders. At the bottom of the plug, there is a fixed plugging and unplugging component. The controller is electrically connected to the hydraulic jack through a wire;

[0006] On both sides of one end at the bottom of the fine-tuning tilting component, there are mounting blocks. On the side where the two groups of mounting blocks are close to each other, there are mounting grooves. On one side inside the mounting groove, a threaded rod is sleeved. On the outer side of the threaded rod, internally threaded sleeves that are mutually adapted are symmetrically sleeved. On the top of the two groups of internally threaded sleeves, there are hinged rods, and the hinged rods are connected to the guide block;

[0007] At the bottom of the fixed plugging and unplugging component, there is a plug cover. At the bottom inside the plug cover, there are three threaded holes. On the side where the two groups of sliders are close to each other, there is a connected mounting plate. At the middle position at the bottom of the mounting plate, a driving gear is sleeved. At the edge at the bottom of the mounting plate, there are three bearing seats. Inside the three bearing seats, bolts that are mutually adapted to the threaded holes are sleeved. At the bottom of the outer side of the three bolts, there are driven gears that are meshed with the driving gear.

[0008] Preferably, a turning handle is sleeved inside the driving gear, and a protective cover is arranged on the outer side of the turning handle.

[0009] Preferably, the main support is in a shape of "Ji" and fits with the plug cover. At the middle position at the bottom of the main support, there is a hatch door. At the middle position at the bottom of both ends of the main support, there are protective covers.

[0010] Preferably, on one side of the outer side of the threaded rod, there is a dial, and anti-slip lines are arranged on the outer side of the dial.

[0011] Preferably, at the bottom inside the pile leg, there is a jack, and the jack is mutually adapted to the plug.

[0012] Preferably, the hinge seat and the hydraulic jacking device are in an active structure and cooperate with each other.

[0013] Preferably, there are three through holes inside the mounting plate, and the through holes cooperate with the bolts.

[0014] Preferably, the bolts and the threaded holes are in a threaded fixed structure and cooperate with each other.

[0015] Preferably, a rubber washer is arranged on the top of the bearing seat.

[0016] A plugging and unplugging device for the plug of a hydraulic lifting system has the following usage steps:

[0017] I. When the device is installed and inserted, the plug cover and the plug can be aligned and inserted and fixed at the combined position of the ring beam and the pile leg, and the hydraulic jacking device is started through the controller, so that the hydraulic jacking device drives the main support to lift and lower and fits with the plug cover. This not only ensures the positioning effect of the plug, but also facilitates the subsequent fixing and pulling out work.

[0018] II. During the operation of the device, when the position offset between the ring beam and the leg causes the latch pin to jam, the driving gear can be rotated to drive the mounting plate to rotate in cooperation with the bearing seat. By using the sliding guidance of the slide rail and the slider and the connection and cooperation of the mounting plate, the bolt passes through the main bracket and rotates and connects in a threaded structure within the threaded hole, so that the main bracket and the latch pin cover are butted and fixed on the basis of being fitted together. At this time, the hydraulic jack can be started, and the main bracket drives the latch pin cover to push the latch pin out of the ring beam and the leg, and the jammed latch pin can be disengaged from the ring beam and the leg.

[0019] III. After the main bracket and the latch pin cover are butted and the latch pin is pulled out, during the process of pulling out the latch pin, the threaded rod can be manually rotated to drive the two internal threaded sleeves to move to one side. Through the movement of the internal threaded sleeves, the articulated rod and the guide block slide and move in cooperation with the guide groove, and under the active cooperation of the articulated seat, the hydraulic jack is tilted to a specified position in the same direction for angle adjustment, so as to facilitate finding the inclination angle suitable for the jammed latch pin quickly and conveniently when pulling out the latch pin, minimizing the damage suffered by the components during the plugging and unplugging process, and further enhancing the stability and practicality of the plugging and unplugging structure.

[0020] Compared with the prior art, the present invention provides a plugging and unplugging device and a using method for a latch pin of a hydraulic lifting system, having the following beneficial effects:

[0021] 1. Through the mutual cooperation of the fixed plugging and unplugging components, when the latch pin cannot be pulled out due to reasons such as the inclination of the ring beam, the bolt can be threadedly fixed with the threaded hole, so that the main bracket and the latch pin cover form a connection and cooperation. At this time, the hydraulic jack can be started to lift the main bracket, forcing the latch pin to be pulled out of the inside of the leg and the ring beam. This device can be applied to most hydraulic latch pin type lifting systems, ensuring the convenience and operability of the device during maintenance and repair work during the lifting process of the platform or the leg.

[0022] 2. Through the meshing and matching of the driving gear and the driven gear, the three bolts can be quickly threadedly positioned with the threaded hole by using the rotational cooperation of the bearing seat, and the lifting guidance is carried out in cooperation with the slide rail and the slider. When the components are threadedly docked, it not only prevents the bolt from being misaligned and offset during rotation, but also quickly inserts the three bolts into the threaded hole, enabling the main bracket and the latch pin cover to form a connection, improving the manual operation efficiency of the staff, effectively strengthening the stability of the docking of the main bracket and the latch pin cover, and making the force during the subsequent plugging and unplugging of the latch pin more uniform.

[0023] 3. By using the mutual cooperation of the fine-tuning inclination components, the hydraulic jack can be slowly displaced under the guiding cooperation of the guide groove and the guide block and the movable connection of the articulated seat and the hydraulic jack, so that the latch pin better adapts to the current jammed pulling-out angle, ensuring that the damage suffered by the latch pin during the pulling-out process is minimized and the stability of the latch pin detachment is better. Brief Description of the Drawings

[0024] Figure 1 is the front sectional view of the present invention;

[0025] Figure 2 is the front view of the present invention;

[0026] Figure 3 is the bottom sectional view of the present invention;

[0027] Figure 4 is the rear view of the hydraulic jack of the present invention;

[0028] Figure 5 is the perspective view of the mounting plate of the present invention;

[0029] Figure 6 is the perspective view of the bolt of the present invention.

[0030] In the figure: 1, ring beam; 2, mounting block; 201, mounting groove; 202, internal thread sleeve; 203, threaded rod; 204, articulated rod; 3, hydraulic jack; 4, main bracket; 5, slide rail; 6, slider; 7, driven gear; 701, bearing seat; 702, bolt; 703, bolt cover; 704, mounting plate; 705, driving gear; 706, threaded hole; 8, articulated seat; 9, bolt; 10, leg; 11, controller; 12, guide groove; 13, guide block. Detailed Description of the Invention

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Embodiment 1

[0033] Please refer to Figures 1-6, the present invention provides a technical solution: a plugging and unplugging device and a usage method for a hydraulic lifting system pin, including a ring beam 1 and a controller 11, characterized in that: a leg 10 surrounds the ring beam 1, and a pin 9 that cooperates with the leg 10 is sleeved at the middle position inside the ring beam 1. Hinge seats 8 are provided on both sides of the bottom of the ring beam 1. Hydraulic jacks 3 are hinged inside the two hinge seats 8. The output ends of the two hydraulic jacks 3 are provided with a main bracket 4 connected to each other. Slide rails 5 are provided on both sides inside the main bracket 4. Guide grooves 12 are provided at one end of the back of the two hydraulic jacks 3. Guide blocks 13 that cooperate with each other are provided inside the two guide grooves 12. Fine-tuning inclination components are provided on both sides at one end of the bottom of the ring beam 1. Sliders 6 are provided on both sides inside the two slide rails 5. A fixed plugging and unplugging component is provided at the bottom of the pin 9. The controller 11 is electrically connected to the hydraulic jack 3 through a wire;

[0034] Installation blocks 2 are provided on both sides at one end of the bottom of the fine-tuning inclination component. An installation groove 201 is provided on the side where the two installation blocks 2 are close to each other. A threaded rod 203 is sleeved on one side inside the installation groove 201. Mutually adapted internal threaded sleeves 202 are symmetrically sleeved on the outer side of the threaded rod 203. Hinged rods 204 are hinged at the tops of the two internal threaded sleeves 202, and the hinged rods 204 are connected to the guide blocks 13;

[0035] A pin cover 703 is provided at the bottom of the fixed plugging and unplugging component. Three threaded holes 706 are provided at the bottom inside the pin cover 703. A mounting plate 704 connected to each other is provided on the side where the two sliders 6 are close to each other. A driving gear 705 is sleeved at the middle position of the bottom of the mounting plate 704. Three bearing seats 701 are provided at the edge of the bottom of the mounting plate 704. Bolts 702 that are adapted to the threaded holes 706 are sleeved inside the three bearing seats 701. Driven gears 7 are provided at the bottoms of the outer sides of the three bolts 702 and are meshed with the driving gear 705.

[0036] As a preferred solution of this embodiment: a turning handle is sleeved inside the driving gear 705, and a protective cover is provided on the outer side of the turning handle, which is convenient for operation and use.

[0037] As a preferred solution of this embodiment: the main bracket 4 has a U-shaped structure and fits with the pin cover 703. A hatch is provided at the middle position of the bottom of the main bracket 4. Protective covers are provided at the middle positions of the bottoms of both ends of the main bracket 4, which increases the protection of the components.

[0038] As a preferred solution of this embodiment: a dial is provided on one side of the outer side of the threaded rod 203, and an anti-slip pattern is provided on the outer side of the dial, which enhances the operability.

[0039] Embodiment Two

[0040] Please refer to Figures 1-6, the present invention provides a technical solution: a plugging and unplugging device and a usage method for a hydraulic lifting system pin, including a ring beam 1 and a controller 11, characterized in that: a leg 10 is provided at the top of the ring beam 1, and a pin 9 that cooperates with the leg 10 is sleeved at the middle position inside the ring beam 1. Hinge seats 8 are provided on both sides of the bottom of the ring beam 1. Hydraulic jacks 3 are hinged inside the two hinge seats 8. The output ends of the two hydraulic jacks 3 are provided with a main bracket 4 connected to each other. Slide rails 5 are provided on both sides inside the main bracket 4. Guide grooves 12 are provided at one end of the back of the two hydraulic jacks 3. Guide blocks 13 that cooperate with each other are provided inside the two guide grooves 12. Fine-tuning inclination components are provided on both sides at one end of the bottom of the ring beam 1. Slide blocks 6 are provided on both sides inside the two slide rails 5. A fixed plugging and unplugging component is provided at the bottom of the pin 9. The controller 11 is electrically connected to the hydraulic jack 3 through a wire;

[0041] Installation blocks 2 are provided on both sides at one end of the bottom of the fine-tuning inclination component. An installation groove 201 is provided on the side where the two installation blocks 2 are close to each other. A threaded rod 203 is sleeved on one side inside the installation groove 201. Internally threaded sleeves 202 that are mutually adapted are symmetrically sleeved on the outer side of the threaded rod 203. Hinged rods 204 are hinged at the tops of the two internally threaded sleeves 202, and the hinged rods 204 are connected to the guide blocks 13;

[0042] A pin cover 703 is provided at the bottom of the fixed plugging and unplugging component. Three threaded holes 706 are provided at the bottom inside the pin cover 703. A mounting plate 704 connected to each other is provided on the side where the two slide blocks 6 are close to each other. A driving gear 705 is sleeved at the middle position of the bottom of the mounting plate 704. Three bearing seats 701 are provided at the edge of the bottom of the mounting plate 704. Bolts 702 that are mutually adapted to the threaded holes 706 are sleeved inside the three bearing seats 701. Driven gears 7 are provided at the bottoms of the outer sides of the three bolts 702 and are meshed with the driving gear 705.

[0043] As a preferred solution of this embodiment: a turning handle is sleeved inside the driving gear 705, and a protective cover is provided on the outer side of the turning handle, which is convenient for operation and use.

[0044] As a preferred solution of this embodiment: the main bracket 4 is in a U-shaped structure and fits with the pin cover 703. A hatch is provided at the middle position of the bottom of the main bracket 4. Protective covers are provided at the middle positions of the bottoms of both ends of the main bracket 4, which increases the protection of the components.

[0045] As a preferred solution of this embodiment: a dial is provided on one side of the outer side of the threaded rod 203, and an anti-slip pattern is provided on the outer side of the dial, which enhances the operability.

[0046] As a preferred solution of this embodiment: a jack is provided at the bottom inside the leg 10, and the jack is mutually adapted to the pin 9, which is convenient for the insertion and fixation of the components.

[0047] As a preferred solution of this embodiment: The hinge seat 8 and the hydraulic jack 3 are in an active structure and cooperate with each other, facilitating the movement of components for angle adjustment.

[0048] As a preferred solution of this embodiment: There are three groups of through holes inside the mounting plate 704, and the through holes cooperate with the bolts 702, enabling the components to be inserted and fixed.

[0049] As a preferred solution of this embodiment: The bolt 702 and the threaded hole 706 are in a threaded fixed structure and cooperate with each other, facilitating the alignment and connection of the device.

[0050] As a preferred solution of this embodiment: A rubber washer is provided on the top of the bearing seat 701, increasing the adhesion and buffering force between components.

[0051] A method for using a plugging and unplugging device for a hydraulic lifting system pin is as follows:

[0052] 1. When installing and inserting the device, the plug cover 703 can be aligned with the plug 9 and inserted and fixed at the combined position of the collar beam 1 and the leg 10, and the hydraulic jack 3 is started through the controller 11, so that the hydraulic jack 3 drives the main bracket 4 to lift and lower, and fits with the plug cover 703. This not only ensures the positioning effect of the plug 9 but also facilitates subsequent fixing and unplugging work.

[0053] 2. During the operation of the device, when the collar beam 1 and the leg 10 are displaced and the plug 9 is stuck, the driving gear 705 can be rotated to drive the mounting plate 704 to rotate in cooperation with the bearing seat 701, and by using the sliding guide of the slide rail 5 and the slider 6 and the connection cooperation of the mounting plate 704, the bolt 702 passes through the main bracket 4 and is rotationally connected in the threaded hole 706 in a threaded structure, so that the main bracket 4 and the plug cover 703 are butt-joined and fixed on the basis of fitting. At this time, the hydraulic jack 3 can be started to drive the main bracket 4 to drive the plug cover 703 to push the plug 9 out of the collar beam 1 and the leg 10, and the stuck plug 9 can be disengaged from the collar beam 1 and the leg 10.

[0054] 3. After the main bracket 4 and the plug cover 703 are butt-joined and during the process of pulling out the plug 9, the threaded rod 203 can be manually rotated to drive the two internal threaded sleeves 202 to move to one side. The movement of the internal threaded sleeves 202 drives the articulated rod 204 and the guide block 13 to slide in cooperation with the guide groove 12, and under the active cooperation of the hinge seat 8, the hydraulic jack 3 is tilted to a specified same-direction position for angle adjustment, so as to facilitate finding the inclination angle suitable for the stuck plug 9 quickly and conveniently when pulling out the plug 9, minimizing the damage suffered by the components during plugging and unplugging, and further enhancing the stability and practicality of the use of this plugging and unplugging structure.

[0055] In summary: When the device is started, the fixed plug-in component is used to quickly form a threaded fixation between the bolt 702 and the threaded hole 706, completing the docking of the main bracket 4 and the plug cover 703. By starting the hydraulic jack 3, the main bracket 4 is forced to drive the plug cover 703 and the plug 9 to lift out of the inside of the ring beam 1 and the leg 10. With the mutual cooperation of the fine-tuning inclination components, the stability of the plug 9 being pulled out is further ensured, the damage received is reduced, and the subsequent service life of the components is extended. This device can be applied to the vast majority of hydraulic plug-type lifting systems. During the lifting and lowering process of the platform or the leg 10, when the plug 9 gets stuck due to the asynchronous movement between the lifting systems or the uneven force on the plug 9, this device can be used.

[0056] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than limiting the protection scope of the present invention. Any simple modification or equivalent replacement made by those of ordinary skill in the art to the technical solution of the present invention does not depart from the essence and scope of the technical solution of the present invention.

Claims

1. A plugging and unplugging device for a hydraulic lifting system pin, comprising a ring beam (1) and a controller (11). Characterized in that: The ring beam (1) surrounds the leg (10). At the middle position inside the ring beam (1), a pin (9) that cooperates with the leg (10) is sleeved. On both sides of the bottom of the ring beam (1), hinge seats (8) are provided. Inside the two hinge seats (8), a hydraulic jack (3) is hinged. At the output ends of the two hydraulic jacks (3), a main bracket (4) is connected. On both sides of the inside of the main bracket (4), slide rails (5) are provided. At one end of the back of the two hydraulic jacks (3), guide grooves (12) are provided. Inside the two guide grooves (12), guide blocks (13) that cooperate with each other are provided. On both sides of one end of the bottom of the ring beam (1), a fine-tuning inclination component is provided. On both sides of the inside of the two slide rails (5), sliders (6) are provided. At the bottom of the pin (9), a fixed plugging and unplugging component is provided. The controller (11) is electrically connected to the hydraulic jack (3) through a wire. On both sides of one end of the bottom of the fine-tuning inclination component, mounting blocks (2) are provided. On the side where the two mounting blocks (2) are close to each other, a mounting groove (201) is provided. On one side inside the mounting groove (201), a threaded rod (203) is sleeved. On the outer side of the threaded rod (203), internally threaded sleeves (202) that are mutually adapted are symmetrically sleeved. At the tops of the two internally threaded sleeves (202), a hinge rod (204) is hinged, and the hinge rod (204) is connected to the guide block (13). At the bottom of the fixed plugging and unplugging component, a pin cover (703) is provided. At the bottom inside the pin cover (703), three threaded holes (706) are provided. On the side where the two sliders (6) are close to each other, a connecting mounting plate (704) is provided. At the middle position of the bottom of the mounting plate (704), a driving gear (705) is sleeved. At the edge of the bottom of the mounting plate (704), three bearing seats (701) are provided. Inside the three bearing seats (701), bolts (702) that are mutually adapted to the threaded holes (706) are sleeved. At the bottom of the outer sides of the three bolts (702), a driven gear (7) that meshes with the driving gear (705) is provided.

2. A plugging and unplugging device for a hydraulic lifting system pin according to claim 1, Characterized in that: Inside the driving gear (705), a turning handle is sleeved, and a protective cover is provided on the outer side of the turning handle.

3. A plugging and unplugging device for a hydraulic lifting system pin according to claim 1, Characterized in that: The main bracket (4) is in a U-shaped structure and fits with the pin cover (703). At the middle position of the bottom of the main bracket (4), a hatch is provided. At the middle positions of the bottoms of both ends of the main bracket (4), protective covers are provided.

4. A plugging and unplugging device for a hydraulic lifting system pin according to claim 1, Characterized in that: On one side of the outer side of the threaded rod (203), a dial is provided, and anti-slip lines are provided on the outer side of the dial.

5. A plugging and unplugging device for a hydraulic lifting system pin according to claim 1, Characterized in that: A socket is provided at the bottom inside the leg (10), and the socket is adapted to the bolt (9).

6. A plugging and unplugging device for a bolt of a hydraulic lifting system according to claim 1, characterized in that: The hinge seat (8) and the hydraulic jack (3) are in a movable structure and cooperate with each other.

7. A plugging and unplugging device for a bolt of a hydraulic lifting system according to claim 1, characterized in that: Three through holes are provided inside the mounting plate (704), and the through holes cooperate with the bolts (702).

8. A plugging and unplugging device for a bolt of a hydraulic lifting system according to claim 1, characterized in that: The bolt (702) and the threaded hole (706) are in a threaded fixed structure and cooperate with each other.

9. A plugging and unplugging device for a bolt of a hydraulic lifting system according to claim 1, characterized in that: A rubber washer is provided on the top of the bearing seat (701).

10. A method for using a plugging and unplugging device for a bolt of a hydraulic lifting system, including a plugging and unplugging device for a bolt of a hydraulic lifting system according to any one of claims 1-9, and the steps of the using method are as follows: First, when the device is installed and inserted, align the bolt cover (703) with the bolt (9) and insert and fix it at the combined position of the collar (1) and the leg (10), and start the hydraulic jack (3) through the controller (11) to drive the main bracket (4) to lift and lower, and fit with the bolt cover (703); Second, when the device is operating and moving, when the collar (1) and the leg (10) are displaced and the bolt (9) is stuck, rotate the driving gear (705) to drive the mounting plate (704) to rotate in cooperation with the bearing seat (701), and utilize the sliding guidance of the slide rail (5) and the slider (6) and the connection cooperation of the mounting plate (704) to make the bolt (702) pass through the main bracket (4) and rotate and connect in the threaded hole (706) in a threaded structure, so that the main bracket (4) and the bolt cover (703) are butt-joined and fixed on the basis of fitting. At this time, start the hydraulic jack (3) to drive the main bracket (4) to drive the bolt cover (703) to push the bolt (9) out of the collar (1) and the leg (10), and separate the stuck bolt (9) from the collar (1) and the leg (10); Third, after the main bracket (4) and the bolt cover (703) are butted, during the process of pulling out the bolt (9), manually rotate the threaded rod (203) to drive the two internal threaded sleeves (202) to move to one side, drive the hinge rod (204) and the guide block (13) to slide and move in cooperation with the guide groove (12) through the movement of the internal threaded sleeves (202), and under the movable cooperation of the hinge seat (8), make the hydraulic jack (3) tilt to a specified same-direction position for angle adjustment, so as to facilitate finding the inclination angle suitable for the stuck bolt (9) quickly and conveniently when pulling out the bolt (9), and minimize the damage suffered by the components during plugging and unplugging.

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