Hydraulic nut hoisting tool

Abstract

The invention relates to a hydraulic nut hoisting tool which comprises two semicircular ring tools, and hoisting plates flush with the end faces are arranged on the end faces of the two ends of each semicircular ring tool. The two semicircular ring tools are oppositely attached in the opening direction, and the two attached hanging plates are detachably connected through a connecting assembly so as to form a ring tool used for containing the hydraulic nut. A lifting hole is formed in the lifting plate and used for being connected with a lifting appliance of a crane to lift the circular ring tool. The design can be suitable for hydraulic nuts of various specifications, and different hoisting tasks can be adapted by adjusting the combination of the semicircular ring tool and the hoisting plate. And secondly, the hanging plates are located at the two ends of the two semicircular ring tools, and the connecting and supporting effects are achieved. A lifting hole is formed in each lifting plate and used for being connected with a lifting appliance of a crane, so that lifting and positioning are facilitated. Therefore, the problems that an existing hydraulic nut hoisting tool is not suitable for installation of a novel product shafting rotor, and hoisting point positions cannot be designed are solved.

Description

Technical Field

[0001] The invention relates to the technical field of ship hydraulic nut installation, and in particular to a hydraulic nut lifting tool. Background Art

[0002] During the installation of the shaft rotor of a new type of ship, due to the change in the installation process of the new product, the hydraulic nut is installed using a self-contained hydraulic lifting tooling system, which results in the old tooling no longer being suitable for the installation of the shaft rotor of the new product; and due to the installation requirements, the lifting points on the surface of the hydraulic nut cannot be designed;

[0003] When the hydraulic nut is lifted to the tail shaft where it needs to be installed, the old tooling cannot assist in the rotation of the hydraulic nut, making the installation process difficult and requiring only manual lifting and rotation for installation. In addition, the use of hydraulic nuts for locking large workpieces is usually a difficult and time-consuming project with potential safety hazards. Therefore, there is an urgent need for a new type of hydraulic nut lifting tooling that is compatible with the new type of hydraulic nut and can facilitate the assembly of the hydraulic nut. Summary of the invention

[0004] The embodiment of the present application provides a hydraulic nut lifting tool to solve the problem that the existing hydraulic nut lifting tool is not suitable for the installation of the shaft system rotor of the new product and the lifting point cannot be designed.

[0005] A hydraulic nut lifting tool is provided, which includes: two semi-circular ring tools, each of which has end faces at both ends provided with hanging plates flush with the end faces; the two semi-circular ring tools are relatively fitted along the opening direction, and the two fitted hanging plates are detachably connected through a connecting component to form a circular ring tool for accommodating the hydraulic nut; and the hanging plates are provided with hanging holes for connecting the lifting equipment of the crane to lift the circular ring tool.

[0006] In some embodiments, the connecting assembly includes two fixedly connected detachable buckles; the detachable buckle on one side of the connecting assembly passes through the corresponding hanging holes of the two semi-circular ring tooling to detachably connect the two semi-circular ring tooling; the detachable buckle on the other side is used for detachable connection with the lifting device of the crane.

[0007] In some embodiments, two first through holes are provided on the hanging plate, and the two first through holes are symmetrically arranged on both sides of the hanging hole along the length direction of the hanging plate; the connecting assembly includes a bolt and a first nut; the bolt passes through the first through holes of the hanging plate corresponding to the two semi-circular ring toolings, and the first nut is screwed in from the threaded end of the bolt and abuts against the corresponding hanging plate to detachably connect the two semi-circular ring toolings.

[0008] In some embodiments, the semicircular ring tooling includes two semicircular ring plates disposed at intervals; two hanging plates are respectively fixed between corresponding ends of the two semicircular ring plates, and the hanging plates are flush with the ends of the semicircular ring plates.

[0009] In some embodiments, a limiting assembly for limiting the hydraulic nut is further included; a plurality of limiting assemblies radially penetrate two semi-circular ring toolings of the circular ring tooling and are distributed at intervals along the circular ring tooling.

[0010] In some embodiments, a second through hole is provided at a trisection point of each semicircular ring plate; the limiting assembly includes a screw and a second nut; the screw passes through the corresponding second through holes of the two semicircular ring plates, and the two second nuts are respectively screwed in from both ends of the screw and respectively abut against the corresponding semicircular ring plates; or,

[0011] A second through hole is provided at the quartering point of each semicircular ring plate; the limiting assembly comprises a screw rod and a second nut; the screw rod passes through the corresponding second through holes of the two semicircular ring plates, and the two second nuts are respectively screwed in from both ends of the screw rod and respectively correspond to the semicircular ring plates.

[0012] In some embodiments, an auxiliary roller is further included, which is sleeved on the screw and located between the two semicircular ring plates.

[0013] In some embodiments, the plurality of auxiliary rollers are distributed in a ring shape; the diameter of the ring shape is larger than the inner diameter of the circular ring tooling, and the diameter of the ring shape is smaller than the outer diameter of the circular ring tooling.

[0014] In some embodiments, the inner diameter of the annular fixture is smaller than the diameter of the hydraulic nut.

[0015] In some embodiments, in the semicircular ring fixture, the distance between the two semicircular ring plates is greater than the thickness of the hydraulic nut.

[0016] The beneficial effects of the technical solution provided by this application include:

[0017] The embodiment of the present application provides a hydraulic nut lifting tool, wherein the circular ring tool is composed of two semi-circular ring tools through corresponding hanging plates, which are detachably connected in the form of connecting components such as bolts or other fixings, so as to realize a design that is easy to disassemble and assemble. This design enables the tool to be flexibly adjusted according to different sizes of hydraulic nuts. And the hanging plate is flush with the end of each corresponding semi-circular ring tool, ensuring that when the two semi-circular ring tools are detachably connected, the corresponding hanging plate and the corresponding semi-circular ring tool are perfectly fitted; this design can be applied to hydraulic nuts of various specifications, and can be adapted to different lifting tasks by adjusting the combination of the semi-circular ring tool and the hanging plate. Secondly, the hanging plates are located at both ends of the two semi-circular ring tools, playing the role of connection and support. Each hanging plate is provided with a hanging hole for connecting the sling of the crane to facilitate lifting and positioning. Thereby solving the problem that the existing hydraulic nut lifting tool is not suitable for the installation of the shaft rotor of the new product and the lifting point cannot be designed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of the hoisting of a ring tooling for a hydraulic nut provided in an embodiment of the present application;

[0020] Figure 2 A schematic side view of a ring tooling for a hydraulic nut provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the details of the hanging plate of the circular tooling provided in an embodiment of the present application.

[0022] In the figure: 1, circular ring tooling; 2, semi-circular ring tooling; 21, semi-circular ring plate; 22, second through hole; 3, hanging plate; 31, hanging hole; 32, first through hole; 4, limit assembly; 41, screw rod; 42, second nut; 5, auxiliary roller. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] The embodiment of the present application provides a hydraulic nut lifting tool, which can solve the problem that the existing hydraulic nut lifting tool is not suitable for the installation of the shaft system rotor of a new product and the lifting point cannot be designed.

[0025] Since the installation process of the new ship shaft system rotor has changed due to the change in the installation process of the new product, the hydraulic nut installation process uses a self-contained hydraulic lifting tool system for installation, which makes the old tool no longer suitable for the installation of the new product shaft system rotor; and the surface of the hydraulic nut cannot be designed with lifting points due to installation requirements. Then design a new hydraulic nut lifting tool that can adapt to the installation of the new product shaft system rotor, and design a device structure that can solve the lifting positioning; first, design a tool that can accommodate the hydraulic nut, which is divided into two detachable parts, so as to facilitate the placement of the hydraulic nut and its removal after installation, and further design a structure that can stably lift the detachable parts, so that the crane can stably lift the tool to the installation point. Thereby solving the problem that the existing hydraulic nut lifting tool is not suitable for the installation of the new product shaft system rotor and the lifting point cannot be designed.

[0026] refer to Figure 1-3 A hydraulic nut lifting tool comprises: two semi-circular ring tools 2, and the end faces of both ends of each semi-circular ring tool 2 are provided with hanging plates 3 flush with the end faces; the two semi-circular ring tools 2 are relatively fitted along the opening direction, and the two fitted hanging plates are detachably connected through a connecting component to form a circular ring tool 1 for accommodating hydraulic nuts; a hanging hole 31 is provided on the hanging plate 3, which is used to connect the lifting tool of the crane to lift the circular ring tool 1.

[0027] Through this structural design, the circular ring fixture 1 is composed of two semi-circular ring fixtures 2 through corresponding hanging plates 3, which are detachably connected in the form of connecting components such as bolts or other fixings, so as to realize a design that is easy to disassemble and assemble. This design enables the fixture to be flexibly adjusted according to different hydraulic nut sizes. And the hanging plate 3 is flush with the end of each corresponding semi-circular ring fixture 2, ensuring that when the two semi-circular ring fixtures 2 are detachably connected, the corresponding hanging plate 3 and the corresponding semi-circular ring fixture 2 are perfectly fitted; this design can be applied to hydraulic nuts of various specifications, and can be adapted to different lifting tasks by adjusting the combination of the semi-circular ring fixture 2 and the hanging plate 3. Secondly, the hanging plate 3 is located at both ends of the two semi-circular ring fixtures 2, playing the role of connection and support. Each hanging plate 3 is provided with a hanging hole 31 for connecting the sling of the crane to facilitate lifting and positioning. Thereby solving the problem that the existing hydraulic nut lifting fixture is not suitable for the installation of the shaft rotor of the new product and the lifting point cannot be designed.

[0028] It is important to know that, on the basis of solving this technical problem, when hoisting to the tail shaft to be installed, the old tooling cannot assist in the rotation of the hydraulic nut, and the installation process is difficult. It can only be installed by manual lifting and rotation. In addition, the hydraulic nut is used to lock large workpieces, which is usually a difficult and time-consuming project, and there are safety hazards. Then the internal structure of the tooling is further designed so that the hydraulic nut can be firmly limited in the tooling, and after lifting and positioning, the auxiliary hydraulic nut can be safely and conveniently installed to the corresponding tail shaft. The following will further introduce the optimized implementation example of the hydraulic nut lifting tooling. Thereby solving the problem that the installation of the existing hydraulic nut is difficult and time-consuming, and there are safety hazards.

[0029] In some preferred embodiments, the connecting assembly includes two fixedly connected detachable buckles; the detachable buckle on one side of the connecting assembly passes through the corresponding hanging holes 31 of the two semi-circular ring tooling 2 to detachably connect the two semi-circular ring tooling 2; the detachable buckle on the other side is used for detachable connection with the lifting device of the crane.

[0030] Through the design of this structure, the connecting component plays the role of locking the two semi-circular ring tooling 2, and the detachable design facilitates the installation and disassembly of the construction; secondly, the connecting component can also be detachably connected to the hoisting device of the crane as an auxiliary part, so as to assist the circular ring tooling 1 to be lifted and positioned by the crane. That is, the connecting component not only locks the tooling, but also detachably connects with the hoisting device of the crane. This design provides greater flexibility for the lifting operation. The construction team can quickly adjust the lifting plan according to specific needs to adapt to different operating environments; on the other hand, it is necessary to know that in the actual construction process, the hoisting device can be a connecting part such as a wire rope, a sling or a hand winch that can connect the lifting hole 31 to the crane.

[0031] In some preferred embodiments, two first through holes 32 are provided on the hanging plate 3, and the two first through holes 32 are symmetrically arranged on both sides of the hanging hole 31 along the length direction of the hanging plate 3; the connecting assembly includes a bolt and a first nut; the bolt passes through the first through holes 32 of the hanging plates 3 corresponding to the two semi-circular ring tooling 2, and the first nut is screwed in from the threaded end of the bolt and abuts against the corresponding hanging plate 3, so that the two semi-circular ring tooling 2 are detachably connected.

[0032] In this embodiment, two first through holes 32 are introduced and a connecting assembly is used to realize the detachable connection between the semi-circular ring tooling 2 and the hanging plate 3. The two symmetrical first through holes 32 are distributed on both sides of the hanging hole 31, which can provide better stability during the lifting process. The symmetrical design can balance the force and avoid structural instability caused by excessive force on one side. The design simplifies the installation and disassembly process by using the connection method of bolts and first nuts. The operator can adjust and replace the semi-circular ring tooling more conveniently, which improves efficiency in actual operation. This structure has strong adaptability and can be adjusted for semi-circular ring tooling of different sizes and weights. By selecting suitable bolts and nuts, the needs of different application scenarios can be met. It is important to know that it is necessary to ensure that the bolts and the first nuts are made of high-strength materials to withstand the expected load without failure.

[0033] In some preferred embodiments, the semicircular ring tooling 2 includes two semicircular ring plates 21 disposed at intervals; two hanging plates 3 are respectively fixed between corresponding ends of the two semicircular ring plates 21, and the hanging plates 3 are flush with the ends of the semicircular ring plates 21.

[0034] Through the design of this structure, two semicircular ring plates 21 and corresponding hanging plates 3 are introduced to form a more stable and efficient lifting system. The spacing of the two semicircular ring plates 21 increases the lateral stability of the overall structure, so that the center of gravity can be well controlled during the lifting process, significantly reducing the risk of tilting. The hanging plate 3 is level with the end of the semicircular ring plate 21, which can ensure that the load is evenly distributed during lifting and reduce the uneven force phenomenon. The combined design of the two semicircular ring plates 21 and the hanging plate 3 makes the components easier to disassemble and replace, simplifies the assembly and maintenance process, and is convenient for on-site operations and later maintenance. It should be noted that such a circular ring design allows the circular tooling 1 to move freely and conveniently, and the two semicircular ring plates 21 set at intervals also allow it to be firmly in place when stationary. And ensure the processing accuracy of each component, especially the fixation of the hanging plate 3 at the interval of the semicircular ring plate 21, to avoid potential risks caused by assembly errors.

[0035] In some preferred embodiments, a limiting component 4 for limiting the hydraulic nut is further included; a plurality of limiting components 4 radially penetrate the two semi-circular ring fixtures 2 of the circular ring fixture 1 and are circumferentially spaced and distributed along the circular ring fixture 1 .

[0036] Through this structural design, the limiting component 4 is designed to limit the position of the hydraulic nut to ensure that it does not fall off the circular ring fixture 1 during use. The limiting component 4 is inserted in a direction perpendicular to the circular ring and is tightly connected to the two semi-circular ring fixtures 2. In this connection mode, the limiting component 4 can also effectively disperse the load and ensure the stability of the entire structure.

[0037] In some preferred embodiments, each semicircular ring plate 21 is provided with a second through hole 22 at a point where three equal parts are divided; the limiting assembly includes a screw rod 41 and a second nut 42; the screw rod 41 passes through the corresponding second through holes 22 of the two semicircular ring plates 21, and the two second nuts 42 are respectively screwed into the two threaded ends of the screw rod 41 and respectively abut against the corresponding semicircular ring plates 21; or,

[0038] A second through hole 22 is provided at the quartering point of each semicircular ring plate 21; the limiting assembly includes a screw rod 41 and a second nut 42; the screw rod 41 passes through the corresponding second through holes 22 of the two semicircular ring plates 21, and the two second nuts 42 are respectively screwed into the two threaded ends of the screw rod 41 and respectively abut against the corresponding semicircular ring plates 21.

[0039] In the structure of this embodiment, a limiting assembly 4 for limiting the hydraulic nut is designed, which includes a screw 41 and a second nut 42, in order to enhance the stability of the lifting structure and prevent the hydraulic nut from falling off. A second through hole 22 is set at the trisection point of each semicircular ring plate 21, which increases the installation fixing point and prepares for the positioning installation of the limiting assembly 4; so that the screw 41 can pass through the two semicircular ring plates 21, so that the two semicircular ring plates 21 can be effectively connected and fixed to ensure that they will not loosen due to load changes, and secondly, the hydraulic nut is limited to prevent it from falling off. The design of the limiting assembly 4 is to limit the movement of the hydraulic nut, and secondly to provide strong support to ensure that each semicircular ring plate 21 can remain stable under loading conditions and prevent structural deformation caused by external forces. It should be noted that the positioning distribution of the trisection points is mainly to better limit the hydraulic nut, and more points can be set further.

[0040] Another design mainly increases the number of fixing points, namely, the second through holes 22, to better ensure the limiting of the hydraulic nut and improve the overall structural stability of the annular fixture 1. It should be noted that, if practical, more second through holes 22, namely, more limiting components 4, can be designed.

[0041] In some preferred embodiments, an auxiliary roller 5 is further included. The auxiliary roller 5 is sleeved on the screw rod 41 and is located between the two semicircular ring plates 21 .

[0042] Through this structural design, the auxiliary roller 5 is introduced as an auxiliary component for better installation and rotation of the hydraulic nut. The auxiliary roller 5 is installed on the screw 41 by a sleeve connection and is located between the two semicircular ring plates 21. This design makes full use of the space and ensures the orderly layout of the components. The hydraulic nut can be freely rotated in the tooling under the limit of the auxiliary roller 5, which provides convenient conditions for the hydraulic nut to be installed on the tail shaft thread. And it should be known that through the rolling mechanism, the rotation of the hydraulic nut becomes smoother, reducing the energy loss caused by friction. The auxiliary roller 5 should be made of wear-resistant materials to ensure that it is not easy to wear in long-term use. And ensure that its surface is smooth, so that during the rotation and installation of the hydraulic nut, the friction between them is reduced, the outer surface of the hydraulic nut is protected, and the wear on the ring tooling 1 is minimized. The connection between the auxiliary roller 5 and the screw 41 should be designed to be easy to disassemble and maintain good coaxiality to ensure the smoothness of the rotation. Secondly, in order to improve the service life of the auxiliary roller 5, an appropriate lubrication mechanism can be equipped during installation to keep it running smoothly for a long time.

[0043] In some preferred embodiments, the plurality of auxiliary rollers 5 are distributed in a ring shape; the diameter of the ring shape is larger than the inner diameter of the circular ring fixture 1 , and the diameter of the ring shape is smaller than the outer diameter of the circular ring fixture 1 .

[0044] Through this structural design, multiple auxiliary rollers 5 are designed to be distributed in the same ring shape, and the diameter of the ring shape is larger than the inner diameter of the circular fixture 1 and smaller than the outer diameter of the circular fixture 1. The key to this design is to ensure that the hydraulic nut is placed under specific permitted conditions. This design ensures that the hydraulic nut can only be placed in the circular fixture 1 when it meets the size requirements. Multiple auxiliary rollers 5 are evenly distributed along the ring intervals. These auxiliary rollers 5 are not only responsible for supporting the hydraulic nut, but also play a guiding and limiting role. Due to the presence of the auxiliary rollers 5, the hydraulic nut can be rotated more easily in the circular fixture 1, making the disassembly and installation process more efficient. It should be noted that during the manufacturing process, the size matching between the auxiliary rollers 5 and the hydraulic nuts is ensured to avoid gaps that are too large or too small.

[0045] In some preferred embodiments, the inner diameter of the annular fixture 1 is smaller than the diameter of the hydraulic nut.

[0046] This embodiment is intended to clearly define the size relationship between the circular fixture 1 and the hydraulic nut. The circular fixture 1 is composed of a plurality of detachably connected semicircular ring plates 21 to form a complete circular ring structure. This structure is designed to ensure smooth installation and operation of the hydraulic nut. The diameter of the hydraulic nut is designed to be larger than the inner diameter of the circular ring. This design ensures that the hydraulic nut can be securely supported in the circular fixture 1 during use to prevent it from falling off during operation.

[0047] In some preferred embodiments, in the semicircular ring fixture 2, the distance between the two semicircular ring plates 21 is greater than the thickness of the hydraulic nut.

[0048] Through this structural design, the semicircular ring fixture 2 is composed of two semicircular ring plates 21, and these semicircular ring plates are connected by a hanging plate 3. It should be noted that the spacing between the two semicircular ring plates 21 is greater than the thickness of the hydraulic nut. By appropriately increasing the spacing between the two semicircular ring plates 21, the operator can obtain a larger operating space when handling the hydraulic nut. This not only improves the flexibility of operation, but also reduces the risk of operating errors caused by insufficient space. Ensuring that there is enough space between the two semicircular ring plates is mainly to fit the thickness of the hydraulic nut so that it can be smoothly placed in the ring fixture 1, and secondly to enable the operator to install and remove the hydraulic nut more conveniently, reducing potential problems caused by interference with the hydraulic nut during installation or removal.

[0049] The beneficial effects brought by the present invention include:

[0050] The present invention proposes a hydraulic nut lifting tool, in which a hanging plate 3 is located at both ends of two semi-circular ring tools 2, providing necessary support for the entire tool and enhancing the stability of the structure. The two semi-circular ring tools 2 are detachably connected together by the hanging plate 3 to ensure that the various parts will not separate during the lifting process, thereby ensuring the integrity of the tool when in use. The hanging hole 31 on each hanging plate 3 is designed to provide convenience for connecting the sling of the crane, making the lifting operation more efficient. The layout of the hanging hole 31 can be designed according to actual needs to facilitate accurate lifting and positioning. By connecting the crane through the hanging hole, the risk during the operation can be effectively reduced, the safety and stability during lifting can be ensured, the accidents caused by uneven weight can be reduced, and the installation and positioning can be better performed. Secondly, the tool can be flexibly adjusted according to the size of different hydraulic nuts to meet the installation and disassembly requirements of various hydraulic nuts. This feature is particularly important for a changeable application environment. Thereby solving the problem that the existing hydraulic nut lifting tool is not suitable for the installation of the shaft rotor of a new product and the lifting point cannot be designed.

[0051] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0052] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0053] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A hydraulic nut lifting tool, characterized in that: It includes: Two semi-circular ring fixtures (2), each of the semi-circular ring fixtures (2) having end surfaces at both ends provided with a hanging plate (3) flush with the end surface; The two semicircular ring fixtures (2) are relatively fitted along the opening direction, and the two fitted hanging plates are detachably connected via a connecting assembly to form a circular ring fixture (1) for accommodating a hydraulic nut; The hanging plate (3) is provided with a hanging hole (31) for connecting a hanging device of a crane to lift the circular tooling (1).

2. The hydraulic nut lifting tool as claimed in claim 1, characterized in that: The connecting assembly comprises two detachable buckles that are fixedly connected; The detachable buckle on one side of the connecting component passes through the corresponding hanging holes (31) of the two semi-circular ring fixtures (2), so as to detachably connect the two semi-circular ring fixtures (2); The detachable buckle on the other side is used for detachable connection with the lifting device of the crane.

3. The hydraulic nut lifting tool as claimed in claim 1, characterized in that: The hanging plate (3) is provided with two first through holes (32), and the two first through holes (32) are symmetrically arranged on both sides of the hanging hole (31) along the length direction of the hanging plate (3); The connecting assembly comprises a bolt and a first nut; The bolt passes through the first through hole (32) of the corresponding hanging plate (3) of the two semi-circular ring fixtures (2), and the first nut is screwed in from the threaded end of the bolt and abuts against the corresponding hanging plate (3) to detachably connect the two semi-circular ring fixtures (2).

4. The hydraulic nut lifting tool as claimed in claim 1, characterized in that: The semicircular ring tool (2) comprises two semicircular ring plates (21) arranged at intervals; The two hanging plates (3) are respectively fixed between the corresponding ends of the two semicircular ring plates (21), and the ends of the hanging plates (3) and the semicircular ring plates (21) are flush.

5. The hydraulic nut lifting tool as claimed in claim 1, characterized in that: It also includes a limiting assembly (4) for limiting the position of the hydraulic nut; The plurality of limit assemblies (4) radially penetrate the two semi-circular ring fixtures (2) of the circular ring fixture (1), and are distributed at intervals along the circular ring fixture (1).

6. The hydraulic nut lifting tool as claimed in claim 5, characterized in that: A second through hole (22) is provided at a trisection point of each of the semicircular ring plates (21); The limiting assembly comprises a screw rod (41) and a second nut (42); the screw rod (41) passes through the corresponding second through holes (22) of the two semicircular ring plates (21); the two second nuts (42) are respectively screwed in from the two threaded ends of the screw rod (41) and respectively abut against the corresponding semicircular ring plates (21); or, A second through hole (22) is provided at the quartering point of each of the semicircular ring plates (21); The limiting assembly comprises a screw rod (41) and a second nut (42); the screw rod (41) passes through the corresponding second through holes (22) of the two semicircular ring plates (21); the two second nuts (42) are respectively screwed in from the two threaded ends of the screw rod (41) and respectively abut against the corresponding semicircular ring plates (21).

7. The hydraulic nut lifting tool as claimed in claim 6, characterized in that: It also comprises an auxiliary roller (5), wherein the auxiliary roller (5) is sleeved on the screw rod (41) and is located between the two semicircular ring plates (21).

8. The hydraulic nut lifting tool as claimed in claim 7, characterized in that: The plurality of auxiliary rollers (5) are distributed in a ring shape; The diameter of the ring is greater than the inner diameter of the circular ring fixture (1), and the diameter of the ring is smaller than the outer diameter of the circular ring fixture (1).

9. The hydraulic nut lifting tool as claimed in claim 4, characterized in that: The inner diameter of the annular fixture (1) is smaller than the diameter of the hydraulic nut.

10. The hydraulic nut lifting tool as claimed in claim 4, characterized in that: In the semicircular ring fixture (2), the distance between the two semicircular ring plates (21) is greater than the thickness of the hydraulic nut.

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