A hydraulic operating mechanism hoisting tool

Abstract

This utility model discloses a lifting tool for a hydraulic operating mechanism, including an upper lifting structure, a middle telescopic structure, and a lower limiting structure. The upper lifting structure and the lower limiting structure are connected by the middle telescopic fixing structure. One end of the upper lifting structure is fixedly connected to one end of the middle telescopic fixing structure, and one end of the lower limiting structure is fixedly connected to the other end of the middle telescopic fixing structure. A lifting ring is provided on the upper lifting structure, and a limiting block is provided on the lower limiting structure. The upper lifting structure, the middle telescopic structure, and the lower limiting structure form a U-shaped profile, and the opening width of the U-shaped profile is greater than the thickness of the top of the hydraulic operating mechanism's fixing frame. The U-shaped structure enables the hydraulic operating mechanism to be lifted into the circuit breaker's fixing frame. This allows for lifting without the use of a forklift, enabling the hydraulic operating mechanism to be installed in or removed from the circuit breaker's frame, thereby avoiding personal injury or equipment safety accidents and improving product assembly efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic operating mechanism hoisting technology, and specifically relates to a hydraulic operating mechanism hoisting tool. Background Technology

[0002] Currently, most of the hydraulic operating mechanisms of 220kV and above porcelain column circuit breakers are installed inside the frame.

[0003] Due to product structure limitations, a forklift is used to lift the mechanism during installation. The mechanism is then horizontally inserted into the frame from the side, and slowly lowered to the bottom of the frame. Lifting ropes are then threaded through the openings in the top plate of the frame to secure the mechanism. Finally, a crane is used to vertically lift the mechanism for hanging installation.

[0004] When using forklifts, the lack of reliable securing of the mechanism can easily lead to personal injury or equipment accidents, and assembly efficiency is also low. Therefore, researching and designing a safe, reliable, time-saving, labor-saving, and highly efficient hydraulic lifting tool is of great significance. Utility Model Content

[0005] The purpose of this invention is to overcome the problem of unreliable fixation when a hydraulic operating mechanism is installed within a frame, and to propose a lifting tool for the hydraulic operating mechanism. It is safe, reliable, simple in structure, time-saving, labor-saving, and highly efficient in installation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A hydraulic operating mechanism lifting tool includes an upper lifting structure, an intermediate telescopic structure, and a lower limiting structure. The upper lifting structure and the lower limiting structure are connected by the intermediate telescopic fixing structure. One end of the upper lifting structure is fixedly connected to one end of the intermediate telescopic fixing structure, and one end of the lower limiting structure is fixedly connected to the other end of the intermediate telescopic fixing structure. A lifting ring is provided on the upper lifting structure, and a limiting block is provided on the lower limiting structure. The upper lifting structure, the intermediate telescopic structure, and the lower limiting structure form a U-shaped profile. The opening width of the U-shaped profile is greater than the thickness of the top of the hydraulic operating mechanism fixing frame.

[0007] Furthermore, the intermediate telescopic fixing structure includes an upper rod spiral sleeve and a lower spiral rod. One end of the upper rod spiral sleeve is fixedly connected to one end of the upper hoisting structure, the other end of the upper rod spiral sleeve is threadedly connected to one end of the lower spiral rod, and the other end of the lower spiral rod is fixedly connected to one end of the lower limiting structure.

[0008] Furthermore, the upper screw sleeve is a tubular structure with internal threads, and the lower screw rod is a rod-shaped structure with external threads.

[0009] Furthermore, the upper hoisting structure includes an upper tube and a thick plate. The thick plate is installed on the top surface of the upper tube, and several mounting holes are opened on the thick plate. A lifting ring is installed on any one of the mounting holes. One end of the upper tube is fixedly connected to one end of the middle telescopic fixing structure.

[0010] Furthermore, the lower limit structure includes a lower tube, one end of which is fixedly connected to the other end of the intermediate telescopic fixing structure, and the limit block is installed on the top surface of the lower tube.

[0011] Furthermore, both the upper and lower tubes are hollow rectangular cross-section structures.

[0012] Furthermore, the limiting block includes a first limiting block, and several sets of threaded holes are opened on the top surface of the lower tube. The limiting block is installed on any set of threaded holes by screws.

[0013] Furthermore, the limiting block includes a second limiting block, which is installed on the top surface of the other end of the lower tube.

[0014] Furthermore, a first stiffening plate assembly is installed at the overlap between one end of the upper hoisting structure and one end of the intermediate telescopic structure, and a second stiffening plate assembly is installed at the overlap between one end of the lower limiting structure and the other end of the intermediate telescopic structure.

[0015] Furthermore, both the first stiffening plate group and the second stiffening plate group are provided with two stiffening plates, which are triangular or rectangular thin plates.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: This utility model proposes a hydraulic operating mechanism lifting tool, which is designed as a telescopic and adjustable "U"-shaped lifting tool using square tubing connected by welding and threads. In use, the "U"-shaped opening of the lifting tool is laid flat. One side of the "U"-shaped opening is designed with a fixed structure for lifting the hydraulic operating mechanism, while the other side is designed with an adjustable structure for the lifting hook point. The telescopic adjustment structure is achieved through the threaded connection between the upper and lower screw rods. The "U"-shaped structure allows for the lifting of the hydraulic operating mechanism into the circuit breaker's fixed frame. This allows for lifting without the use of a forklift, enabling the installation or removal of the hydraulic operating mechanism from the circuit breaker's frame, thus avoiding personal injury or equipment safety accidents and improving product assembly efficiency. Attached Figure Description

[0017] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the present invention and do not specifically limit the shapes and proportions of the components. In the drawings: Figure 1 This is a front view of a hydraulic operating mechanism lifting tool according to this utility model.

[0018] Figure 2 This is a side view of a hydraulic lifting tool according to the present invention.

[0019] Figure 3 This is a top view of a hydraulic operating mechanism lifting tool according to this utility model.

[0020] Figure 4 This is a partial structural diagram of a hydraulic operating mechanism lifting tool according to the present invention.

[0021] Figure 5 This is a schematic diagram illustrating the specific application of a hydraulic operating mechanism lifting tool according to this utility model.

[0022] Among them, 1 is a square tube, 2 is a lifting ring, 3 is a thick plate, 4 is a stiffening plate, 5 is an upper rod spiral sleeve, 6 is a lower spiral rod, 7 is a lower tube, 8 is a first limiting block, 9 is a second limiting block, 10 is a screw, 11 is a mechanism frame, and 12 is a hydraulic operating mechanism. Detailed Implementation

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0024] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] Example 1 A hydraulic operating mechanism lifting tool includes an upper lifting structure, an intermediate telescopic structure, and a lower limiting structure. The upper lifting structure and the lower limiting structure are connected by the intermediate telescopic fixing structure. One end of the upper lifting structure is fixedly connected to one end of the intermediate telescopic fixing structure, and one end of the lower limiting structure is fixedly connected to the other end of the intermediate telescopic fixing structure. A lifting ring 2 is provided on the upper lifting structure, and a limiting block is provided on the lower limiting structure. The upper lifting structure, the intermediate telescopic structure, and the lower limiting structure form a U-shaped profile. The opening width of the U-shaped profile is greater than the thickness of the top of the fixed frame of the hydraulic operating mechanism 12.

[0028] This utility model's intermediate telescopic structure allows for overall height adjustment via threaded connection, adapting to different specifications of the mechanism frame 11. The U-shaped opening width is greater than the thickness of the hydraulic operating mechanism 12's fixing frame, ensuring the tool can smoothly enter and exit the fixing frame. It is suitable for the hoisting needs of various circuit breaker hydraulic operating mechanisms. The upper hoisting structure adjusts the position of the standard lifting ring 2 through multiple sets of threaded holes in the thick plate 3, precisely matching the center of gravity of the hydraulic operating mechanism 12 and preventing tilting during hoisting. It supports the simultaneous installation of two lifting rings, further distributing the load and improving hoisting balance. The lower limit structure's limit blocks are fixed to both sides of the fixing frame, restricting the mechanism's inward and outward movement, preventing slippage or collision during hoisting, and ensuring installation positioning accuracy. The reinforced design of the upper hoisting structure, lower limit structure, and the stiffening plates 4 at the square tube overlap ensures the overall load-bearing capacity of the tool, meeting the weight requirements of the hydraulic operating mechanism and preventing hoisting deformation. The limiting block 8 is detachably connected to the threaded hole of the lower tube 7 via screw 10, and its position can be quickly adjusted according to the size of the fixing frame without the need to replace the entire tool; the "U" shaped structure design allows the tool to be directly inserted into the frame 11 of the mechanism, simplifying the hoisting path, realizing the precise alignment and fixation of the hydraulic operating mechanism within the frame, and shortening the installation time.

[0029] This utility model discloses a hydraulic operating mechanism lifting tool, the working method of which includes the following steps: Based on the height of the mechanism frame 11, the threaded connection structure between the upper screw sleeve 5 and the lower screw rod 6 is rotated to adjust the overall height of the lifting tool, ensuring that the "U"-shaped profile fits the frame door size. Based on the center of gravity position of the hydraulic operating mechanism 12, the lifting ring 2 is fixed through the threaded hole of the thick plate 3, either as a single ring or double ring, ensuring the mechanism's balance during lifting. Based on the width of the fixed frame, the limiting block 8 is fixed to the corresponding threaded hole of the lower tube 7 using screws 10, so that the limiting block 8 and the welded limiting block 9 are located on opposite sides of the fixed frame, leaving a gap of 1mm-5mm.

[0030] Extend the cantilever of the "U"-shaped opening of the hoisting tool horizontally into the fixed frame of the hydraulic operating mechanism 12, so that the limit blocks engage with both sides of the fixed frame, restricting the inward and outward movement of the mechanism. Connect the hoisting equipment through the standard lifting ring 2 of the upper hoisting structure, slowly lift the hydraulic operating mechanism 12, pass it through the door frame of the mechanism frame 11, and adjust its position to the middle of the frame.

[0031] Slowly lower the mechanism to its fixed installation position within the frame, and secure the hydraulic operating mechanism 12 to the mechanism frame 11 with bolts. Release the hoisting equipment, lower the hoisting tool a certain distance to detach the "U"-shaped cantilever from the fixed frame, and horizontally pull out the tool to complete the fixed installation of the hydraulic operating mechanism on the circuit breaker product.

[0032] Adjust the height of the threaded retraction tool, loosen the lifting ring 2 and the limit block 8, and complete the tool reset and storage.

[0033] The intermediate telescopic fixing structure includes an upper spiral sleeve 5 and a lower spiral rod 6. One end of the upper spiral sleeve 5 is fixedly connected to one end of the upper lifting structure, and the other end of the upper spiral sleeve 5 is threadedly connected to one end of the lower spiral rod 6. The other end of the lower spiral rod 6 is fixedly connected to one end of the lower limiting structure. The upper spiral sleeve 5 is a tubular structure with internal threads, and the lower spiral rod 6 is a rod-shaped structure with external threads. The upper lifting structure includes an upper tube 1 and a thick plate 3. The thick plate 3 is installed on the top surface of the upper tube 1, and several mounting holes are opened on the thick plate 3. The lifting ring 2 is installed in any one of the mounting holes. One end of the upper tube 1 is fixedly connected to one end of the intermediate telescopic fixing structure. The lower limiting structure includes a lower tube 7. One end of the lower tube 7 is fixedly connected to the other end of the intermediate telescopic fixing structure, and a limiting block is installed on the top surface of the lower tube 7. Both the upper tube 1 and the lower tube 7 are hollow rectangular cross-section structures. The limiting block includes a first limiting block 8. Several sets of threaded holes are opened on the top surface of the lower tube 7, and the first limiting block 8 is installed in any set of threaded holes by screws. The limiting block includes a second limiting block 9, which is installed on the top surface of the other end of the lower pipe 7. A first stiffening plate group is installed at the overlap between one end of the upper hoisting structure and one end of the intermediate telescopic structure, and a second stiffening plate group is installed at the overlap between one end of the lower limiting structure and the other end of the intermediate telescopic structure. Both the first and second stiffening plate groups are provided with two stiffening plates 4, which are triangular or rectangular thin plates.

[0034] In this embodiment, the thick plate 3 has several mounting holes. The mounting hole position of the lifting ring 2 can be selected according to the actual center of gravity position of the hydraulic operating mechanism 12, supporting single or double lifting ring configurations to prevent the mechanism from tilting or flipping during hoisting. The first limiting block 8 is flexibly fixed to the lower tube 7 with screws and multiple sets of threaded holes. In conjunction with the welded second limiting block 9, the fixing frame is clamped from both sides to restrict the forward and backward movement of the mechanism, prevent slippage during hoisting, and improve positioning accuracy. The upper tube 1 and the lower tube 7 adopt a hollow rectangular cross-section structure, which combines lightweight and high rigidity to meet the weight bearing requirements of the hydraulic operating mechanism. The first and second stiffening plate groups at the overlap are reinforced with two triangular / rectangular stiffening plates 4 in each group by welding, which effectively disperses stress, avoids deformation of the connection node, and improves the overall structural stability of the tool. The upper hoisting, middle telescopic, and lower limit structures are assembled after being independently formed, making parts replacement and maintenance convenient; the screw connection design of limit block 8 allows for quick position adjustment, and can be adapted to different fixing frame widths without disassembling the whole tool; the "U" shaped structure extends directly into the frame door frame, and works with the limit block for precise positioning, reducing hoisting path interference, realizing rapid alignment and fixation of the mechanism within the frame, and shortening the installation time of a single piece of equipment.

[0035] This embodiment discloses a hydraulic lifting tool, the working method of which includes the following steps: Rotate the upper screw sleeve 5 and the lower screw rod 6 to match the overall height of the lifting tool with the installation height of the mechanism frame 11. After adjustment, maintain the threaded connection in a pre-tightened state. According to the center of gravity position of the hydraulic operating mechanism 12, fix the lifting ring 2 to the corresponding mounting hole of the thick plate 3 with bolts. According to the width of the fixed frame, fix the first limiting block 8 to the matching threaded hole of the lower tube 7 with screws to ensure that the distance between it and the second limiting block 9 is equal to the width of the fixed frame + 2mm - 10mm gap.

[0036] Extend the cantilever of the "U"-shaped opening side of the hoisting tool horizontally into the bottom of the fixed frame of the hydraulic operating mechanism 12, so that the first limiting block 8 and the second limiting block 9 respectively fit against the outer walls of the two sides of the fixed frame to complete the lateral limiting of the mechanism; check the reliability of the connection of the lifting ring 2 and the clamping status of the limiting blocks to ensure that there is no loosening or tilting.

[0037] Connect the lifting equipment via the lifting ring 2, slowly lift the hydraulic operating mechanism 12, raise it vertically and pass it through the door frame of the mechanism frame 11, adjust the lifting posture to align the center line of the mechanism with the installation position inside the frame; continue to lower the mechanism to the fixed installation surface inside the frame, and temporarily fix the mechanism with guide bolts or positioning pins to ensure that the installation holes are aligned.

[0038] The hydraulic operating mechanism 12 is fastened to the mechanism frame 11 with bolts, and the fixing strength is checked; the hoisting equipment is controlled to fall slowly, so that the "U"-shaped cantilever is disengaged from the fixed frame, and the hoisting tools are pulled out horizontally to complete the installation.

[0039] Rotate the middle telescopic structure in the opposite direction to retract the tool to its minimum height, and release the lifting ring 2 and the first limit block 8 if necessary to complete the tool reset and storage.

[0040] Example 2 The overall structure of a hydraulic lifting tool according to this embodiment is shown in the three-view diagram. Figure 1 , Figure 2 , Figure 3 As shown, a partial structural diagram is as follows: Figure 4 As shown, the specific application of this lifting tool is as follows: Figure 5 As shown, it includes this lifting tool, mechanism frame 11, and hydraulic operating mechanism 12.

[0041] The hydraulic operating mechanism mentioned in this embodiment mainly consists of five modules: a pressurization module, an energy storage module, a control module, a working module, and a monitoring module. The hydraulic operating mechanism uses disc springs as the energy-providing element and hydraulic oil as the energy transmission medium. Energy is stored through a motor-driven oil pump, converting electrical energy into the elastic potential energy of the disc springs via the hydraulic oil. Due to its characteristics of high output power, short action time, and smooth operation, the hydraulic operating mechanism is widely used in high-voltage circuit breakers, especially in ultra-high voltage and extra-high voltage circuit breakers.

[0042] This utility model utilizes square tubes, square steel, and steel plates, welded and threadedly connected to form a retractable and adjustable "U"-shaped lifting tool. In use, the "U"-shaped opening of the tool is laid flat. One side of the "U"-shaped opening houses the fixed structure for the hydraulic operating mechanism, while the other side features an adjustment mechanism for the lifting hook's lifting point. The retractable structure is achieved through a threaded connection between the upper and lower spiral sleeves. The "U"-shaped structure allows for the lifting of the hydraulic operating mechanism into the circuit breaker's fixed frame.

[0043] A hydraulically operated lifting tool consists of an upper tube 1 and an upper rod screw sleeve 5 welded together to form the upper part of the lifting tool, and a lower tube 7 and a lower screw rod 6 welded together to form the lower part of the lifting tool. The upper and lower parts of the lifting tool are then connected by threads of the upper rod screw sleeve 5 and the lower screw rod 6 to form a "U" shape. The overlapping joints of the lower tube 7 are reinforced and fixed by two stiffening plates 4. Six threaded holes with a small spacing are machined on one side of the thick plate 3 for the fixed installation of the lifting ring 2. The thick plate 3 is fixed to the upper pipe 1 by welding. The position of the lifting ring 2 is adjusted and fixed on the threaded holes by the center of gravity of the hoisting. Two lifting rings 2 can also be fixed at the same time for hoisting. The hoisting tool can be adjusted up and down according to the height of the mechanism frame 11 by means of the threaded connection structure between the upper screw sleeve 5 and the lower screw rod 6 of the hoisting tool. The second limiting block 9 is fixed to one end of the square tube 7 by welding. Several sets of threaded holes are machined on the square tube 7. The first limiting block 8 is fixed to the threaded holes of the square tube 7 by two screws 10. The position of the first limiting block 8 can be adjusted and fixed according to the actual situation. See details. Figure 2 As shown; When using this lifting tool, first, extend the cantilever of one side of the "U"-shaped opening of the lifting tool into the fixing frame of the hydraulic operating mechanism 12 for the circuit breaker, so that the first limit block 8 and the second limit block 9 are held on both sides of the fixing frame of the hydraulic operating mechanism 12, restricting the hydraulic operating mechanism 12 from moving inward or outward. Then, by fixing the standard lifting ring 2 on the other side of the "U"-shaped opening of the lifting tool, slowly lift the hydraulic operating mechanism 12 through the door frame of the mechanism frame 11, so that the hydraulic operating mechanism 12 is in the middle position inside the mechanism frame 11. Slowly lift the hydraulic operating mechanism 12 to its fixed installation position on the mechanism frame 11, and fix the hydraulic operating mechanism 12 to the mechanism frame 11 with bolts. Finally, slowly lower the lifting tool a certain distance, and then pull the lifting tool out of the fixing frame of the hydraulic operating mechanism 11, completing the fixed installation of the hydraulic operating mechanism 11 on the circuit breaker product. This embodiment enables the hydraulic operating mechanism to be horizontally placed into the mechanism frame using only vertical hoisting, and can be lifted up and down within the mechanism frame, achieving complete installation of the hydraulic operating mechanism within the mechanism frame in a single hoisting operation. Compared to the original method of installing the hydraulic operating mechanism within the mechanism frame, this method is more time-saving and labor-saving, improves operational safety and reliability, and increases product assembly efficiency. This embodiment enables the lifting tool to be adjusted vertically and horizontally according to requirements by adjusting the length of the threaded connection between the upper and lower parts of the lifting tool; This embodiment realizes a structure in which the limiting block for fixing the hydraulic operating mechanism on one side of the "U"-shaped opening cantilever can be adjusted according to the size of the hydraulic operating mechanism fixing frame. It can be applied to the hoisting of various hydraulic operating mechanisms and has a wide range of applications. This embodiment allows the hoisting position on the cantilever on the other side of the "U"-shaped opening to be adjusted and fixed by using standard lifting rings in the bolt holes on the cantilever, thus preventing the center of gravity from shifting during hoisting and affecting hoisting safety. Furthermore, the structure is simple and the design is reasonable.

[0044] This embodiment achieves a retractable and adjustable structure by using the threaded connection between the upper screw sleeve and the lower screw rod. The "U"-shaped structure allows the hydraulic operating mechanism to be horizontally placed into the mechanism frame using only vertical hoisting and to be lifted up and down within the mechanism frame. The adjustable and fixed standard lifting ring on the cantilever on the other side of the "U"-shaped opening ensures that the overall hoisting center of gravity does not shift.

[0045] Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the foregoing description. Therefore, the scope of this teaching should not be determined by reference to the foregoing description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed utility model subject matter.

[0046] The above content provides a further detailed description of this utility model. It should not be considered that the specific embodiments of this utility model are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of this utility model, and all of these should be considered to fall within the defined protection scope of this utility model.

Claims

1. A hydraulic operating mechanism hoisting tool characterized by, It includes an upper hoisting structure, an intermediate telescopic structure, and a lower limit structure. The upper hoisting structure and the lower limit structure are connected by an intermediate telescopic fixing structure. One end of the upper hoisting structure is fixedly connected to one end of the intermediate telescopic fixing structure, and one end of the lower limit structure is fixedly connected to the other end of the intermediate telescopic fixing structure. A hoisting ring (2) is provided on the upper hoisting structure, and a limit block is provided on the lower limit structure. The upper hoisting structure, the intermediate telescopic structure, and the lower limit structure form a U-shaped profile. The opening width of the U-shaped profile is greater than the thickness of the top of the fixed frame of the hydraulic operating mechanism (12).

2. A hydraulic operator hoist tool according to claim 1, wherein, The intermediate telescopic fixing structure includes an upper rod spiral sleeve (5) and a lower spiral rod (6). One end of the upper rod spiral sleeve (5) is fixedly connected to one end of the upper hoisting structure, the other end of the upper rod spiral sleeve (5) is threadedly connected to one end of the lower spiral rod (6), and the other end of the lower spiral rod (6) is fixedly connected to one end of the lower limiting structure.

3. A hydraulic operator hoist tool according to claim 2, wherein, The upper spiral sleeve (5) is a tubular structure with internal threads, and the lower spiral rod (6) is a rod-shaped structure with external threads.

4. A hydraulic operator hoist tool according to claim 1, wherein, The upper hoisting structure includes an upper tube (1) and a thick plate (3). The thick plate (3) is installed on the top surface of the upper tube (1). Several mounting holes are opened on the thick plate (3). The lifting ring (2) is installed on any one of the mounting holes. One end of the upper tube (1) is fixedly connected to one end of the middle telescopic fixing structure.

5. A hydraulic operator hoist tool according to claim 4, wherein, The lower limit structure includes a lower tube (7), one end of which is fixedly connected to the other end of the middle telescopic fixing structure, and the limit block is installed on the top surface of the lower tube (7).

6. A hydraulic operator hoist tool according to claim 5, wherein, Both the upper tube (1) and the lower tube (7) are hollow rectangular cross-section structures.

7. A hydraulic operator hoist tool according to claim 6, wherein, The limiting block includes a first limiting block (8), and the top surface of the lower tube (7) is provided with several sets of threaded holes. The limiting block (8) is installed on any set of threaded holes by screws.

8. A hydraulic operator hoist tool according to claim 6, wherein, The limiting block includes a second limiting block (9), which is installed on the top surface of the other end of the lower tube (7).

9. A hydraulic operator hoist tool according to claim 1, wherein, A first stiffening plate group is installed at the overlap between one end of the upper hoisting structure and one end of the middle telescopic structure, and a second stiffening plate group is installed at the overlap between one end of the lower limiting structure and the other end of the middle telescopic structure.

10. A hydraulic operator hoist tool according to claim 9, wherein, Both the first stiffener group and the second stiffener group are provided with two stiffeners (4), and the stiffeners (4) are triangular or rectangular thin plates.

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