A distribution transformer bushing boot

Abstract

The utility model discloses a distribution transformer bushing shield, including sheath main part and transformer bushing, the sheath main part is bellows, and the upper end fixedly connected with upper fixed ring of sheath main part, the lower end fixedly connected with lower fixed ring of sheath main part, the sheath main part is equipped on transformer bushing, be provided with the clamping mechanism for clamping transformer bushing on the upper fixed ring, the upper and lower both ends of sheath main part are all closed design. The utility model discloses reasonable in structure, and sheath main part adopts bellows structure, and the length can be free to stretch out and draw back and adjust, need not to replace different specifications shield, can be adapted to different length distribution transformer bushing, and the scope of application is wide, reduces use cost, and simultaneously uses after completing, compresses bellows type sheath main part, and will be hung in the threaded rod on the hook rotation and hang, can realize the folding fixed of shield, and the volume is greatly reduced after folding, and the space is small, is convenient for transportation and carries and is stored and is deposited, and promotes use convenience.

Description

Technical Field

[0001] This utility model relates to the technical field of protective equipment for distribution transformers, and in particular to a bushing cover for distribution transformers. Background Technology

[0002] The bushing of a distribution transformer is a key component connecting the transformer to external lines. When exposed to the outdoor environment, it is susceptible to dust, rain, snow, and impacts from foreign objects, which can lead to decreased insulation performance, surface corrosion and aging, and even short-circuit faults. Therefore, it needs to be protected by a cover.

[0003] Currently, most traditional transformer bushing covers used in the industry are integrated fixed structures with non-adjustable lengths, only suitable for bushings of specific lengths, resulting in poor adaptability. Installation requires multiple sets of bolts to fix the cover to the transformer housing, making the process cumbersome, time-consuming, and inefficient. Furthermore, the sealing structure of traditional covers is poorly designed, resulting in insufficient fit with the transformer housing, allowing gaps to seep in and impairing protection. In addition, traditional covers have a fixed size, cannot be folded for storage, occupy a large space during transportation, and require additional storage space, making them inconvenient to use. In view of the technical defects of existing protective covers, such as poor adaptability, cumbersome installation, poor sealing effect, and inconvenience in storage and transportation, there is an urgent need for a distribution transformer bushing cover that can flexibly adapt to bushings of different lengths, is easy to install, has reliable sealing, and can be folded and stored, so as to solve the above-mentioned problems in practical applications. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a bushing cover for a distribution transformer.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A bushing cover for a distribution transformer includes a bushing body and a transformer bushing. The bushing body is a corrugated pipe, and an upper fixing ring is fixedly connected to the upper end of the bushing body, and a lower fixing ring is fixedly connected to the lower end of the bushing body. The bushing body is fitted onto the transformer bushing. The upper fixing ring is provided with a clamping mechanism for clamping the transformer bushing. Both the upper and lower ends of the bushing body are closed, and both the upper and lower ends of the bushing body have through holes. The inner bottom and inner top of the bushing body are elastically connected by two symmetrically arranged first springs. The clamping mechanism includes two symmetrically arranged threaded rods that are threaded through and connected to the side wall of the upper fixing ring. One end of each of the two threaded rods located inside the upper fixing ring is rotatably connected to an arc-shaped clamping plate.

[0006] Preferably, both of the arc-shaped clamps are fitted with anti-slip rubber sleeves, and the side walls of the two arc-shaped clamps are elastically connected to the inner wall of the upper fixing ring by a second spring, with the two second springs respectively fitted on the two threaded rods.

[0007] Preferably, each of the two threaded rods has a handle fixedly connected to one end outside the upper fixing ring, and each of the two handles is fitted with an anti-slip sleeve.

[0008] Preferably, the upper end of the lower fixing ring is fixedly connected to two symmetrically arranged U-shaped blocks, and each of the two U-shaped blocks is rotatably connected to a hook, which cooperates with the threaded rod.

[0009] Preferably, an O-ring is installed at the lower end of the lower fixing ring.

[0010] Preferably, a shaft sealing ring is provided inside the upper fixing ring, and the shaft sealing ring is sleeved on the transformer bushing.

[0011] Compared with the prior art, the advantages of this utility model are as follows: 1. The main body of the sheath adopts a corrugated tube structure, which can be freely extended and adjusted in length. It can be adapted to distribution transformer bushings of different lengths without the need to replace different specifications of sheaths. It has a wide range of applications and reduces the cost of use. After use, the corrugated tube sheath body can be compressed and the hook can be rotated and attached to the threaded rod to realize the folding and fixing of the sheath. The volume is greatly reduced after folding, which takes up little space and is convenient for transportation, carrying and storage, thus improving the convenience of use.

[0012] 2. Through the clamping mechanism of the upper fixed ring, simply turn the handle to drive the threaded rod to move, which will drive the arc-shaped clamping plate to clamp the transformer bushing, thus completing the quick fixation of the cover. No complicated tools and multiple sets of bolts are required, which greatly improves the installation efficiency. The pre-tensioning and limiting effect of the second spring further ensures the stability of the clamping and avoids loosening.

[0013] 3. After installation and fixing, remove the hook. The tension of the first spring will cause the lower fixing ring to move downward, so that the "O" ring at the lower end of the lower fixing ring is tightly fitted with the upper end face of the transformer. At the same time, the shaft sealing ring inside the upper fixing ring is fitted with the outer wall of the bushing, forming a double sealing structure that effectively prevents rainwater, dust and foreign objects from entering, and the protection effect is significant. Attached Figure Description

[0014] Figure 1 This is a perspective view of a bushing cover for a distribution transformer proposed in this utility model; Figure 2 This is a bottom perspective view of a bushing cover for a distribution transformer proposed in this utility model; Figure 3 This is a cross-sectional view of a bushing cover for a distribution transformer proposed in this utility model; Figure 4 for Figure 1 Enlarged view of the structure at point A in the image; Figure 5 for Figure 3 Enlarged view of the structure at point B in the image.

[0015] In the diagram: 1. Sheath body, 2. Transformer bushing, 3. Lower fixing ring, 4. Upper fixing ring, 5. Shaft sealing ring, 6. Handle, 7. Threaded rod, 8. "O" ring sealing ring, 9. U-shaped block, 10. Hook, 11. First spring, 12. Arc-shaped clamp, 13. Second spring. Detailed Implementation

[0016] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0017] Reference Figure 1-5 A bushing cover for a distribution transformer includes a cover body 1 and a transformer bushing 2. The cover body 1 adopts an elastic corrugated pipe structure (preferably made of weather-resistant rubber or reinforced plastic), which has the characteristics of being stretchable and foldable, and can be freely adjusted in length to fit transformer bushings 2 of different specifications. The upper end of the cover body 1 is integrally formed and fixedly connected with an annular upper fixing ring 4, and the lower end is fixedly connected with an annular lower fixing ring 3 in the same way. The cover body 1 is completely fitted over the outside of the transformer bushing 2 to form a fully enclosed protection.

[0018] The upper and lower ends of the sheath body 1 are both closed, and a through hole is provided at the installation position of the transformer bushing 2 (the inner diameter of the through hole is adapted to the outer diameter of the transformer bushing 2) to ensure that the bushing can pass through smoothly; the inner bottom (inner side of the lower fixing ring 3) and the inner top (inner side of the upper fixing ring 4) of the sheath body 1 are elastically connected by two symmetrically arranged first springs 11. The first springs 11 are always in a stretched state, providing a downward elastic force for the lower fixing ring 3.

[0019] The upper fixing ring 4 is equipped with a clamping mechanism for quick clamping and fixing. The clamping mechanism includes two symmetrically arranged threaded rods 7 that are threaded through and connected to the side wall of the upper fixing ring 4. The threaded rods 7 are radially distributed along the upper fixing ring 4. One end of each of the two threaded rods 7 located inside the upper fixing ring 4 is rotatably connected to an arc-shaped clamping plate 12 via a bearing. The curvature of the arc-shaped clamping plate 12 is adapted to the outer wall of the transformer bushing 2. The two arc-shaped clamping plates 12 are arranged opposite each other to achieve clamping and fixing of the bushing. The inner side wall of each arc-shaped clamping plate 12 is fitted with an anti-slip rubber sleeve, which not only enhances the clamping friction and prevents the protective cover from shifting, but also buffers the clamping force and prevents scratching the surface of the bushing. The outer side wall of each of the two arc-shaped clamping plates 12 is elastically connected to the inner wall of the upper fixing ring 4 via a second spring 13. The second spring 13 is respectively fitted on the corresponding threaded rod 7 to provide pre-tightening force for the arc-shaped clamping plate 12 and improve clamping stability.

[0020] Handles 6 are welded and fixed to one end of each of the two threaded rods 7 located outside the upper fixed ring 4. The outer peripheral wall of the handle 6 is fitted with an anti-slip rubber sleeve for easy gripping and force application by the operator. The threaded rod 7 can be driven to move axially by rotating the handle 6. A shaft sealing ring 5 is embedded and installed on the inner side wall of the upper fixed ring 4. The shaft sealing ring 5 is fitted on the transformer bushing 2 to achieve a seal between the upper fixed ring 4 and the bushing, preventing foreign objects from seeping in through the through hole.

[0021] Two symmetrically arranged U-shaped blocks 9 are welded and fixed to the upper end of the lower fixing ring 3. The two U-shaped blocks 9 are connected to hooks 10 through pins. The hooks 10 can rotate around the pins and their positions correspond to the threaded rod 7 for fixing in the folded state. An O-ring seal 8 is embedded in the lower end of the lower fixing ring 3. The O-ring seal 8 is made of aging-resistant rubber and is used to fit against the upper surface of the transformer to achieve sealing.

[0022] In use, the sheath body 1 is aligned with the transformer bushing 2, and the through hole of the upper fixing ring 4 is aligned with the upper end of the transformer bushing 2. The sheath is then fitted onto the transformer bushing 2 from top to bottom, ensuring that the lower fixing ring 3 is located above the upper end face of the transformer. At this time, the hook 10 is in a folded and fixed state hooked onto the threaded rod 7, and the sheath body 1 remains in a compressed state. The hook 10 is flipped over to disengage it from the threaded rod 7, releasing the constraint on the lower fixing ring 3. The first spring 11 returns to its tensile deformation, pulling the lower fixing ring 3 downward until the "O"-ring seal 8 at the lower end of the lower fixing ring 3 is tightly fitted with the upper end face of the transformer. At the same time, the shaft seal 5 is fitted onto the transformer bushing 2, and the shaft seal 5 inside the upper fixing ring 4 is tightly fitted with the outer wall of the transformer bushing 2, forming a double seal from top to bottom, completing the protective assembly. Then, the operator holds the handle 6 (the anti-slip sleeve increases grip friction) and simultaneously rotates the two threaded rods 7 clockwise. The threaded rods 7 move radially inward along the upper fixing ring 4, pushing the arc-shaped clamp 12 closer to the transformer bushing 2. This continues until the anti-slip rubber sleeve on the arc-shaped clamp 12 is tightly fitted to the outer wall of the bushing, thus fixing the cover. The second spring 13 provides continuous pre-tightening force to the arc-shaped clamp 12 to prevent loosening. When the cover needs to be removed, first rotate the handle 6 counterclockwise. The threaded rod 7 drives the arc-shaped clamp 12 to move outward, releasing the clamp on the bushing. Pull the lower fixing ring 3 upward to compress the sheath body 1 and the first spring 11, and rotate the hook 10 to attach it to the corresponding threaded rod 7, thus folding and fixing the cover. At this point, the cover can be removed from the bushing. The folded cover is compact and easy to store or transport.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bushing cover for a distribution transformer, comprising a cover body (1) and a transformer bushing (2), characterized in that, The sheath body (1) is a corrugated pipe, and the upper end of the sheath body (1) is fixedly connected to an upper fixing ring (4), and the lower end of the sheath body (1) is fixedly connected to a lower fixing ring (3). The sheath body (1) is sleeved on the transformer bushing (2). The upper fixing ring (4) is provided with a clamping mechanism for clamping the transformer bushing (2). The upper and lower ends of the sheath body (1) are both closed designs, and the upper and lower ends of the sheath body (1) are both provided with through holes. The inner bottom and inner top of the sheath body (1) are elastically connected by two symmetrically arranged first springs (11). The clamping mechanism includes two symmetrically arranged threaded rods (7) that are threaded through and connected to the side wall of the upper fixing ring (4). One end of each of the two threaded rods (7) located inside the upper fixing ring (4) is rotatably connected to an arc-shaped clamping plate (12).

2. The bushing cover for a distribution transformer according to claim 1, characterized in that, Both of the arc-shaped clamps (12) are fitted with anti-slip rubber sleeves, and the side walls of the two arc-shaped clamps (12) are elastically connected to the inner wall of the upper fixing ring (4) by a second spring (13). The two second springs (13) are respectively fitted on the two threaded rods (7).

3. A bushing cover for a distribution transformer according to claim 2, characterized in that, Each of the two threaded rods (7) is fixedly connected to a handle (6) at one end outside the upper fixing ring (4), and both handles (6) are fitted with anti-slip sleeves.

4. A bushing cover for a distribution transformer according to claim 3, characterized in that, The upper end of the lower fixing ring (3) is fixedly connected to two symmetrically arranged U-shaped blocks (9), and hooks (10) are rotatably connected inside the two U-shaped blocks (9), and the hooks (10) cooperate with the threaded rod (7).

5. A bushing cover for a distribution transformer according to claim 4, characterized in that, The lower end of the lower fixing ring (3) is equipped with an "O" type sealing ring (8).

6. A bushing cover for a distribution transformer according to claim 5, characterized in that, The upper fixing ring (4) is provided with a shaft sealing ring (5), which is sleeved on the transformer bushing (2).

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