Special tool for hoisting 220KV transformer high-voltage bushing

Abstract

The special tool for hoisting the 220KV transformer high-voltage bushing comprises a hoisting cylinder with an open bottom and a closed top, a positioning hole is formed in the top of the hoisting cylinder, connecting holes which are uniformly distributed along the circumferential direction of the positioning hole are formed in the top of the hoisting cylinder, a through hole is formed in the top of the hoisting cylinder, and a lifting lug is arranged on the outer wall of the hoisting cylinder. A high-voltage lead pipe on the high-voltage bushing can pass through the designed positioning hole during hoisting, so that the influence of the high-voltage lead pipe can be avoided; through the designed through hole, a deflation valve on the high-pressure bushing can penetrate through the through hole during hoisting, so that the influence of the deflation valve can be avoided; through the designed connecting hole, the military cap on the high-voltage bushing can be conveniently connected and fixed with the top of the hoisting cylinder; and in the hoisting process, the inner wall of the hoisting cylinder can limit the radial displacement of the insulating porcelain bushing on the high-voltage bushing, so that the insulating porcelain bushing is prevented from shaking left and right, and the hoisting stability and safety are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of power equipment, in particular to a special tool for hoisting the high-voltage bushing of a 220KV transformer. Background Art

[0002] The high-voltage bushing is a main component of the transformer. Its main functions are to fix and support the high-voltage lead wire, insulate and isolate the high-voltage lead wire from the transformer shell and the ground, and ensure the safe and stable operation of the transformer. Due to the large volume and heavy weight of the high-voltage bushing of the transformer, the hoisting of the high-voltage bushing is very difficult during the installation and maintenance of the transformer. Especially for the transformer bushing with an inclined angle, the installation difficulty increases exponentially.

[0003] For the transformers currently operating in the State Grid, regardless of the voltage level, model, and manufacturer, the high-voltage bushing generally consists of the following parts structurally: general's cap, upper flange, lower flange, insulating porcelain sleeve, fixed flange, insulating barrel, grading ball, etc. The center of gravity of the high-voltage bushing is on the insulating porcelain sleeve, showing a trend of being heavier at the top and lighter at the bottom. Among them, two lifting lugs are designed on both sides of the fixed flange symmetrically to connect the shackle for hoisting the high-voltage bushing. When hoisting the bushing vertically, the shackle is vertically stressed, meeting the hoisting process requirements of the high-voltage bushing. However, when hoisting the high-voltage bushing horizontally or obliquely, the shackle is stressed laterally, not meeting the hoisting process requirements of the high-voltage bushing. Especially during the hoisting process, when the high-voltage bushing is converted from the horizontal direction to the vertical direction, or from the vertical direction to the horizontal direction, the stress point of the shackle is constantly changing, which easily causes the shackle to deform or break, resulting in accidents. Moreover, during the hoisting process, due to the lack of effective limitation on the lateral displacement of the insulating porcelain sleeve, it is easy to cause the insulating porcelain sleeve to shake, and radial force is easily formed on the bolts connecting the fixing plate and the high-voltage bushing. Summary of the Invention

[0004] In view of this, in order to solve the technical problems existing in the above technology, it is necessary to provide a special tool for hoisting the high-voltage bushing of a 220KV transformer.

[0005] A special tool for hoisting the high-voltage bushing of a 220KV transformer includes a hoisting cylinder with an open bottom and a closed top. A positioning hole is opened at the top of the hoisting cylinder. Connecting holes are opened at the top of the hoisting cylinder and are evenly distributed circumferentially along the positioning hole. A through hole is opened at the top of the hoisting cylinder. A lifting lug is arranged on the outer wall of the hoisting cylinder.

[0006] Preferably, an anti-impact lining is arranged on the inner wall of the hoisting cylinder.

[0007] Preferably, the anti-impact lining includes at least two split inner linings, and each split inner lining is evenly distributed along the inner wall of the hoisting cylinder.

[0008] Preferably, an expansion joint is left between two adjacent split inner linings.

[0009] Preferably, an anti-wear lining is provided at the top inside the lifting cylinder, and the shape of the anti-wear lining fits the top of the lifting cylinder.

[0010] Preferably, the anti-impact lining and the anti-wear lining are made of rubber material.

[0011] Preferably, there are at least two lifting lugs, and each lifting lug is evenly distributed along the outer wall of the lifting cylinder.

[0012] Preferably, a rib plate is provided below the lifting lug.

[0013] Preferably, there are two rib plates, and the two rib plates are symmetrically arranged with respect to the center line of the lifting lug.

[0014] Compared with the prior art, the special tool for lifting the high-voltage bushing of a 220KV transformer provided by the present utility model includes a lifting cylinder with an open bottom and a closed top. A positioning hole is provided at the top of the lifting cylinder, connection holes evenly distributed circumferentially along the positioning hole are provided at the top of the lifting cylinder, a through hole is provided at the top of the lifting cylinder, and lifting lugs are provided on the outer wall of the lifting cylinder. Through the designed positioning hole, the high-voltage lead pipe on the high-voltage bushing can pass through during lifting, so as to avoid the influence of the high-voltage lead pipe; through the designed through hole, the air release valve on the high-voltage bushing can pass through during lifting, so as to avoid the influence of the air release valve; through the designed connection holes, it is convenient to connect and fix the general's cap on the high-voltage bushing to the top of the lifting cylinder; and during the lifting process, the inner wall of the lifting cylinder can also limit the radial displacement of the insulating porcelain sleeve on the high-voltage bushing, preventing the insulating porcelain sleeve from swaying left and right, so as to ensure the stability and safety of lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0016] Figure 1 It is a front view structural schematic diagram of the present utility model.

[0017] Figure 2 For the present utility model Figure 1 is a top view structural schematic diagram.

[0018] Figure 3 For the present utility model Figure 1 is a bottom view structural schematic diagram.

[0019] Figure 4 For the present utility model Figure 1Schematic side view structure diagram.

[0020] Figure 5 This is a utility model Figure 4 Schematic cross-sectional structure diagram of A-A in it.

[0021] In the figure: hoisting cylinder 01, positioning hole 02, connection hole 03, through hole 04, lifting lug 05, anti-impact lining 06, expansion joint 07, anti-wear lining 08, rib plate 09. Specific implementation mode

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be understood that the terms "upper", "middle", "outer", "inner", "lower", etc. indicating orientation or positional relationship are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0024] Please refer to Figures 1 to 5 , the present utility model provides a special tool for hoisting the high-voltage bushing of a 220KV transformer, including a hoisting cylinder 01 with an open bottom and a closed top. A positioning hole 02 is provided at the top of the hoisting cylinder 01. Through the designed positioning hole 02, the high-voltage lead pipe on the high-voltage bushing can pass through during hoisting, so as to avoid the influence of the high-voltage lead pipe. A connection hole 03 evenly distributed along the circumference of the positioning hole 02 is provided at the top of the hoisting cylinder 01. Through the designed connection hole 03, it is convenient to connect and fix the general's cap on the high-voltage bushing to the top of the hoisting cylinder 01. A through hole 04 is provided at the top of the hoisting cylinder 01. Through the designed through hole 04, the air release valve on the high-voltage bushing can pass through during hoisting, so as to avoid the influence of the air release valve. A lifting lug 05 is provided on the outer wall of the hoisting cylinder 01 for connecting a shackle to hoist the high-voltage bushing.

[0025] In one implementation mode, an anti-impact lining 06 is provided on the inner wall of the hoisting cylinder 01. Through the anti-impact lining 06, it can prevent the insulating porcelain sleeve from bumping against the inner wall of the hoisting cylinder 01.

[0026] Specifically, the anti-impact inner lining 06 includes at least two split inner linings, and each split inner lining is evenly distributed along the inner wall of the hoisting cylinder 01. The anti-impact inner lining 06 can be fixed to the inner wall of the hoisting cylinder 01 by bonding or screw fixing. When screw fixing is adopted, a stepped hole needs to be opened on the anti-impact inner lining 06, which can not only provide a place for screw installation but also prevent the screw from leaking out.

[0027] Specifically, an expansion joint 07 is provided between two adjacent split inner linings to prevent wrinkles from forming between the two adjacent split inner linings after the split inner linings are deformed, and at the same time, it is convenient to install each split body on the inner wall of the hoisting cylinder 01.

[0028] In an embodiment, an anti-wear inner lining 08 is provided at the top inside the hoisting cylinder 01, and the shape of the anti-wear inner lining 08 is adapted to the top of the hoisting cylinder 01. The anti-wear inner lining 08 can prevent the top of the hoisting cylinder 01 from rubbing against the high-voltage lead pipe and the insulating porcelain sleeve, causing damage to the high-voltage lead pipe and the insulating porcelain sleeve during hoisting.

[0029] As a preferred method, the anti-impact inner lining 06 and the anti-wear inner lining 08 are made of rubber material.

[0030] In an embodiment, there are at least two lifting lugs 05, and each lifting lug 05 is evenly distributed along the outer wall of the hoisting cylinder 01.

[0031] Among them, a rib plate 09 is provided below the lifting lug 05. By adding the rib plate 09, the overall tensile resistance of the lifting lug 05 can be increased to ensure the overall strength of the lifting lug 05. Two rib plates 09 can be selected for installation, and the two rib plates 09 are symmetrically arranged with respect to the center line of the lifting lug 05. One side of the rib plate 09 is welded to the outer arc surface of the hoisting cylinder 01, and the other side is welded to the bottom surface of the lifting lug 05.

[0032] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited by this. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A special tool for hoisting high-voltage bushing of 220KV transformer, characterized by: It includes a lifting tube with an open bottom and a closed top, a positioning hole is opened on the top of the lifting tube, connecting holes are opened on the top of the lifting tube and are evenly distributed along the circumference of the positioning hole, a through hole is opened on the top of the lifting tube, a lifting ear is arranged on the outer wall of the lifting tube, an anti-collision lining is arranged on the inner wall of the lifting tube, and the anti-collision lining includes at least two split liners, each of which is evenly distributed along the inner wall of the lifting tube.

2. The special tool for hoisting high-voltage bushing of 220KV transformer according to claim 1 is characterized in that: An expansion joint is left between two adjacent split liners.

3. The special tool for hoisting high-voltage bushing of 220KV transformer according to claim 1 is characterized in that: The top of the hoisting tube is provided with an anti-wear lining, and the shape of the anti-wear lining is adapted to the top of the hoisting tube.

4. The special tool for hoisting high-voltage bushing of 220KV transformer according to claim 1 or 3, characterized in that: The anti-collision lining and the anti-wear lining are made of rubber.

5. The special tool for hoisting high-voltage bushing of 220KV transformer according to claim 1 is characterized in that: There are at least two lifting ears, and each lifting ear is evenly distributed along the outer wall of the lifting tube.

6. The special tool for hoisting high-voltage bushing of 220KV transformer according to claim 5 is characterized in that: A rib plate is arranged below the lifting ear.

7. The special tool for hoisting high-voltage bushing of 220KV transformer according to claim 6 is characterized in that: There are two rib plates, which are symmetrically arranged along the center line of the lifting ear.

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