Detachable tool for hoisting low-voltage sleeve

Abstract

The utility model discloses a detachable tool for hoisting a low-voltage sleeve, which relates to the technical field of hoisting tools and comprises a metal frame sleeved at the umbrella skirt of the low-voltage sleeve, a plurality of lifting mechanisms circumferentially arranged at the edge of the metal frame, and moving components arranged at the bottoms of the lifting mechanisms, the metal frame is assembled in a detachable mode. The tool is reasonable in design, the low-voltage bushing of the transformer can be lifted in the vertical direction and moved in the horizontal direction, the bushing can rotate along the axis, the tool can be used for field assembly, the labor intensity of operation can be effectively relieved, the operation risk is reduced, the replacement efficiency of the bushing is improved, and the working efficiency is improved. And meanwhile, the problem of limited space at the main transformer bushing is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting tooling, and more specifically to the technical field of detachable tooling for lifting low-voltage bushings. Background Art

[0002] The transformer low-voltage bushing is an insulating device outside the transformer box. The transformer low-voltage lead must be led to the outside of the oil tank through the low-voltage bushing to insulate the lead from the transformer casing and maintain a sufficient distance. It also plays the role of fixing the lead. The transformer bushing is one of the current-carrying components of the transformer. During the operation of the transformer, the load current passes through it for a long time. When a short circuit occurs outside the transformer, the short-circuit current passes through it. Therefore, the low-voltage bushing is an important auxiliary component of the transformer.

[0003] During transformer operation, low-voltage bushings may leak oil due to the degradation of flange or internal sealing performance of bushings. Therefore, they need to be inspected regularly and replaced if they leak oil. Low-voltage bushings of large transformers are large in size and heavy in weight. The existing hoisting scheme generally adopts porcelain bottle sheds or lifting rings to bear force from the side. The hoisting operation is risky and easy to cause shed damage. Utility Model Content

[0004] The purpose of the utility model is to solve the above technical problems and provide a detachable tool for lifting a low-voltage bushing.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0006] The utility model provides a detachable tooling for lifting a low-pressure bushing, comprising a metal frame sleeved on the low-pressure bushing umbrella skirt, a plurality of lifting mechanisms circumferentially arranged at the edge of the metal frame, and a moving component arranged at the bottom of each of the lifting mechanisms, wherein the metal frame is assembled in a detachable manner.

[0007] Specifically, this solution can realize the vertical lifting and horizontal movement of the transformer low-voltage bushing, and can also rotate the bushing along the axis. The tooling can be assembled on-site, which can effectively reduce the labor intensity of the operation, reduce the operation risk, and improve the efficiency of bushing replacement, while solving the problem of limited space at the main transformer bushing.

[0008] In one embodiment, a flexible anti-scratch layer is provided at the contact point between the metal frame and the low-pressure bushing shed.

[0009] In one embodiment, the flexible anti-scratch layer is made of rubber, flexible plastic or flexible cotton pad.

[0010] In one embodiment, the metal frame includes two symmetrically arranged splicing units, and the connection between the two splicing units is locked by a tightening assembly.

[0011] In one embodiment, the two splicing units have the same structure and are symmetrically arranged. After being spliced ​​together, the two form a metal frame with a circular through hole inside and a regular octagonal shape outside.

[0012] In one embodiment, the tensioning assembly includes two tensioning plates respectively arranged on the two splicing units, and a tensioning bolt assembly for locking the two tensioning plates.

[0013] In one embodiment, each of the splicing units includes an upper plate and a lower plate that are stacked, and their projections in the vertical direction overlap.

[0014] In one embodiment, a plurality of threaded sleeves are arranged at equal intervals between the upper plate and the lower plate, and corresponding positions of the upper plate and the lower plate are provided with through holes for the corresponding threaded sleeves to pass through.

[0015] In one embodiment, the number of the lifting mechanisms on a single side is at least two, the number of the threaded sleeves on a single side is greater than or equal to the number of the lifting mechanisms, and each of the lifting mechanisms includes a screw rod passing through the corresponding sleeve and a locking nut assembly for locking the screw rod.

[0016] In one embodiment, the moving assembly is a universal wheel with a brake mechanism arranged at the bottom of each screw rod.

[0017] Specifically, if Figure 1 As shown, the tooling is circular inside and regular octagonal outside. A locking nut assembly and a screw rod are installed at every two corners of the octagon. A universal wheel is fixed under the screw rod for horizontal transportation of the tooling and casing. The inside of the tooling is protected by soft materials and fixed by tensioning components, which ensures the safety and stability of the casing during lifting.

[0018] Working principle: The metal frame is assembled together by bolts, and bears the load by contacting with the low-pressure casing shed. At the same time, multiple screws are installed on the metal frame, and universal wheels are installed under the screws, which can realize movement in any direction in the horizontal plane and up and down in the vertical direction. The regular octagonal metal frame outside the tooling can protect the casing to prevent the shed from breaking, and also bear the load of the casing during installation and transportation.

[0019] The beneficial effects of the utility model are as follows:

[0020] The utility model has a reasonable design. The bearing point of the casing is at the bottom of the low-pressure casing shed. The metal frame can effectively prevent the casing from displacement during the lifting process after being assembled and fixed. At the same time, the contact part between the tooling and the casing is protected by soft materials, which reduces the risk of collision and damage to the shed. The octagonal frame of the tooling can be disassembled and assembled on site, which is convenient for operation in the limited space of the casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the splicing unit;

[0023] Figure 3 yes Figure 2 A directional view of

[0024] Figure 4 yes Figure 2 A schematic diagram of the structure of the tension bolt assembly and the tension plate;

[0025] Figure numerals: 1-metal frame, 2-screw rod, 3-universal wheel, 4-low-pressure casing, 5-tensioning bolt assembly, 6-tensioning plate, 7-locking nut assembly. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0029] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 invention.

[0030] Example 1

[0031] like Figures 1 to 4 As shown, this embodiment provides a detachable tooling for lifting a low-pressure bushing, comprising a metal frame 1 mounted on the umbrella skirt of the low-pressure bushing 4, a plurality of lifting mechanisms circumferentially arranged at the edge of the metal frame 1, and a moving component arranged at the bottom of each lifting mechanism, and the metal frame 1 is assembled in a detachable manner.

[0032] Specifically, this solution can realize the vertical lifting and horizontal movement of the transformer low-voltage bushing 4, and can also rotate the bushing along the axis. The tooling can be assembled on-site, which can effectively reduce the labor intensity of the operation, reduce the operation risk, and improve the replacement efficiency of the bushing, while solving the problem of limited space at the main transformer bushing.

[0033] Example 2

[0034] like Figures 1 to 4 As shown, this embodiment provides a detachable tooling for lifting a low-pressure bushing, comprising a metal frame 1 mounted on the umbrella skirt of the low-pressure bushing 4, a plurality of lifting mechanisms circumferentially arranged at the edge of the metal frame 1, and a moving component arranged at the bottom of each lifting mechanism, and the metal frame 1 is assembled in a detachable manner.

[0035] A flexible anti-scratch layer is provided at the contact point between the metal frame 1 and the shed of the low-voltage bushing 4 .

[0036] The material of the flexible anti-scratch layer is one of rubber, flexible plastic or flexible cotton pad.

[0037] Example 3

[0038] like Figures 1 to 4 As shown, this embodiment provides a detachable tooling for lifting a low-pressure bushing, comprising a metal frame 1 mounted on the umbrella skirt of the low-pressure bushing 4, a plurality of lifting mechanisms circumferentially arranged at the edge of the metal frame 1, and a moving component arranged at the bottom of each lifting mechanism, and the metal frame 1 is assembled in a detachable manner.

[0039] A flexible anti-scratch layer is provided at the contact point between the metal frame 1 and the shed of the low-voltage bushing 4 .

[0040] The material of the flexible anti-scratch layer is one of rubber, flexible plastic or flexible cotton pad.

[0041] The metal frame 1 includes two symmetrically arranged splicing units, and the connection between the two splicing units is locked by a tightening assembly.

[0042] The two splicing units have the same structure and are symmetrically arranged. After being spliced ​​together, a metal frame 1 is formed which has a circular through hole inside and a regular octagon outside.

[0043] The tensioning assembly includes two tensioning plates 6 respectively arranged on the two splicing units, and a tensioning bolt assembly 5 for locking the two tensioning plates 6 .

[0044] Each splicing unit includes an upper plate and a lower plate which are stacked, and the projections of the upper plate and the lower plate in the vertical direction overlap.

[0045] A plurality of threaded sleeves are arranged at equal intervals between the upper plate and the lower plate, and corresponding positions of the upper plate and the lower plate are provided with through holes for the corresponding threaded sleeves to pass through.

[0046] The number of lifting mechanisms on one side is at least two, the number of threaded sleeves on one side is greater than or equal to the number of lifting mechanisms, and each lifting mechanism includes a screw rod 2 passing through a corresponding sleeve and a locking nut assembly 7 for locking the screw rod 2 .

[0047] The moving component is a universal wheel 3 with a brake mechanism arranged at the bottom of each screw rod 2.

[0048] Specifically, if Figure 1 As shown, the tooling is circular inside and regular octagonal outside, with a locking nut assembly 7 and a screw rod 2 installed at every two corners of the octagon, and a universal wheel 3 fixed under the screw rod 2, which is used for horizontal transportation of the tooling and the casing. The inside of the tooling is protected by soft materials and fixed by tightening components, which ensures the safety and stability of the casing during the lifting process.

[0049] Working principle: The metal frame 1 is assembled together by bolts, and bears the load by contacting with the shed of the low-pressure bushing 4; at the same time, multiple screws 2 are installed on the metal frame 1, and universal wheels 3 are installed under the screws 2, which can realize movement in any direction in the horizontal plane and vertical movement up and down. The regular octagonal metal frame 1 on the periphery of the tooling can protect the bushing to prevent the shed from breaking, and also bear the load of the bushing during installation and transportation.

Claims

1. A detachable tool for lifting low-voltage bushing, characterized in that: It comprises a metal frame (1) sleeved on the shed of a low-pressure bushing (4), a plurality of lifting mechanisms circumferentially arranged at the edge of the metal frame (1), and a moving assembly arranged at the bottom of each of the lifting mechanisms, wherein the metal frame (1) is assembled in a detachable manner; The metal frame (1) comprises two symmetrically arranged splicing units, and the connection between the two splicing units is locked by a tensioning assembly; The two splicing units have the same structure and are symmetrically arranged. After being spliced ​​together, a metal frame (1) is formed which has a circular through hole inside and a regular octagonal shape outside.

2. The detachable tooling for lifting low-voltage bushing according to claim 1 is characterized in that: A flexible anti-scratch layer is provided at the contact point between the metal frame (1) and the low-pressure bushing (4) shed.

3. The detachable tooling for lifting low-voltage bushing according to claim 2 is characterized in that: The material of the flexible anti-scratch layer is one of rubber, flexible plastic or flexible cotton pad.

4. The detachable tool for lifting low-voltage bushing according to claim 1 is characterized in that: The tensioning assembly comprises two tensioning plates (6) respectively arranged on the two splicing units, and a tensioning bolt assembly (5) for locking the two tensioning plates (6).

5. The detachable tooling for lifting low-voltage bushing according to claim 1 is characterized in that: Each of the splicing units comprises an upper plate and a lower plate which are stacked, and their projections in the vertical direction overlap.

6. The detachable tooling for lifting low-voltage bushing according to claim 5 is characterized in that: A plurality of threaded sleeves are arranged at equal intervals between the upper plate and the lower plate, and corresponding positions of the upper plate and the lower plate are provided with through holes for the corresponding threaded sleeves to pass through.

7. The detachable tool for lifting low-voltage bushing according to claim 6, characterized in that: The number of the lifting mechanisms on a single side is at least two, the number of the threaded sleeves on a single side is greater than or equal to the number of the lifting mechanisms, and each lifting mechanism comprises a screw rod (2) passing through the corresponding sleeve and a locking nut assembly (7) for locking the screw rod (2).

8. The detachable tool for lifting low-voltage bushing according to claim 7, characterized in that: The moving assembly is a universal wheel (3) with a brake mechanism arranged at the bottom of each screw rod (2).

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