Pure porcelain oil-filled large-current transformer bushing structure

Abstract

The utility model discloses a pure porcelain oil-filled large-current transformer bushing structure, which comprises a conductor, a porcelain bushing, a flange and a gland, and a plurality of wiring terminals are arranged at the head and the tail of the conductor; the porcelain bushing is coaxially arranged outside the conductor and is connected with a head plate of the conductor in a sealing manner; the flange is arranged outside the porcelain bushing; the gland is connected with the tail of the conductor through a plurality of disc spring fastening structures and then abuts against the tail of the porcelain bushing, and a wiring terminal at the tail of the conductor penetrates through the gland. The bushing is simple in structure, solves the problem that the head structure of an existing pure porcelain oil-filled large-current transformer bushing is large, and is convenient to produce and assemble; and the sealing effect is good, and the operation risk caused by casing pipe permeation is reduced. Meanwhile, the structure is short in oil size and can meet market requirements to a greater extent.

Description

Technical Field

[0001] The utility model relates to a pure porcelain oil-filled high-current transformer bushing structure, belonging to the technical field of high-voltage bushing electrical equipment. Background Art

[0002] At present, the pure porcelain oil-filled high current transformer bushing adopts a tie rod structure, which is sealed and fixedly connected to the lower end plate of the conductor through the upper end face of the head flange; the insulating positioning ring is fixedly connected to the lower end column of the conductor; the upper end of the insulating porcelain part is sealed and connected to the lower end face of the head flange, and the lower end of the insulating porcelain part is in contact with the insulating positioning ring, and the insulating positioning ring extends into the cavity of the porcelain sleeve. This structure has an overly large head and an overly complex structure, which is not conducive to production and assembly, and inconvenient maintenance. Utility Model Content

[0003] The utility model aims to provide a pure porcelain oil-filled high current transformer bushing structure, which has a simple structure and is convenient for production and assembly.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A pure porcelain oil-filled high-current transformer bushing structure comprises a conductor, a porcelain sleeve, a flange and a gland, wherein the head and tail of the conductor are both provided with a plurality of connection terminals; the porcelain sleeve is coaxially arranged outside the conductor and sealedly connected to the head plate of the conductor; the flange is installed outside the porcelain sleeve; the gland is connected to the tail of the conductor through a plurality of disc spring fastening structures and abuts against the tail of the porcelain sleeve, and the connection terminals at the tail of the conductor are inserted through the gland.

[0006] Preferably, the flange is glued together with the porcelain sleeve.

[0007] Preferably, sealing rings are provided at the contact surface between the porcelain sleeve and the head plate of the conductor and at the abutment surface between the gland and the tail of the porcelain sleeve.

[0008] Preferably, the disc spring fastening structure includes a connecting sleeve, a bolt and a disc spring, the disc spring sleeve is arranged on the connecting sleeve, the connecting sleeve is an inverted T-shaped structure and is inserted through the gland, the bolt is inserted through the center hole of the connecting sleeve and is threadedly connected to the tail of the conductor.

[0009] The beneficial effects of the utility model are:

[0010] The structure is simple, which solves the problem of large head structure of existing pure porcelain oil-filled high current transformer bushing, and is easy to produce and assemble; and the sealing effect is good, which reduces the operation risk caused by bushing penetration. At the same time, the structure is short in oil, which can meet the market demand to a greater extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1is a schematic diagram of the structure of the casing;

[0012] Figure 2 It is a structural schematic diagram of the disc spring fastening structure.

[0013] The main reference numerals in the figure have the following meanings:

[0014] 1. Conductor, 2. Porcelain sleeve, 3. Flange, 4. Gland, 5. Terminal block, 6. Disc spring fastening structure, 7. Connecting sleeve, 8. Bolt, 9. Disc spring, 10. Sealing ring. DETAILED DESCRIPTION

[0015] The utility model is specifically introduced below in conjunction with the accompanying drawings and embodiments.

[0016] like Figure 1-2 As shown: This embodiment provides a pure porcelain oil-filled large current transformer bushing structure, including a conductor 1, a porcelain sleeve 2, a flange 3 and a gland 4, and a plurality of wiring terminals 5 are installed at the head and tail of the conductor 1; the porcelain sleeve 2 is coaxially arranged outside the conductor 1 and sealedly connected to the head plate of the conductor 1; the flange 3 is installed outside the porcelain sleeve 2 and glued together with the porcelain sleeve 2; in order to improve the sealing effect, the gland 4 is connected to the tail of the conductor 1 through a plurality of disc spring fastening structures 6 and abuts against the tail of the porcelain sleeve 2, and the wiring terminal 5 at the tail of the conductor 1 is inserted through the gland 4. The disc spring fastening structure 6 includes a connecting sleeve 7, a bolt 8 and a disc spring 9, and the disc spring 9 is sleeved on the connecting sleeve 7. The connecting sleeve 7 is an inverted T-shaped structure and is tightly fitted with the gland 4 after being inserted through the gland 4. The bolt 8 is inserted through the center hole of the connecting sleeve 7 and is threadedly connected to the tail of the conductor 1. At the same time, in order to further improve the sealing effect, sealing rings 10 are provided at the contact surface between the porcelain sleeve 2 and the head plate of the conductor 1 and at the abutment surface between the gland 4 and the tail of the porcelain sleeve 2 .

[0017] The pure porcelain oil-filled high-current transformer bushing has a simple structure, which solves the problem of large head structure of existing pure porcelain oil-filled high-current transformer bushings, and is easy to produce and assemble; it also has a good sealing effect, reducing the operating risk caused by bushing penetration. At the same time, the structure is short in oil and can meet market demand to a greater extent.

[0018] The above is only a preferred implementation of the utility model patent. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model patent. These improvements and modifications should also be regarded as the protection scope of the utility model patent.

Claims

1. A pure porcelain oil-filled high current transformer bushing structure, comprising a conductor, a porcelain sleeve, a flange and a gland, characterized in that: The head and tail of the conductor are both equipped with multiple wiring terminals; the porcelain sleeve is coaxially arranged outside the conductor and sealed with the head plate of the conductor; the flange is installed outside the porcelain sleeve; the gland is connected to the tail of the conductor through multiple disc spring fastening structures and abuts against the tail of the porcelain sleeve, and the wiring terminals at the tail of the conductor are inserted through the gland.

2. A pure porcelain oil-filled high current transformer bushing structure according to claim 1, characterized in that: The flange and the porcelain sleeve are glued together as a whole.

3. The pure porcelain oil-filled high current transformer bushing structure according to claim 1 is characterized in that: Sealing rings are arranged at the contact surface between the porcelain sleeve and the head plate of the conductor and at the abutment surface between the gland and the tail of the porcelain sleeve.

4. A pure porcelain oil-filled high current transformer bushing structure according to claim 1, characterized in that: The disc spring fastening structure includes a connecting sleeve, a bolt and a disc spring, wherein the disc spring sleeve is arranged on the connecting sleeve, the connecting sleeve is an inverted T-shaped structure and is inserted through the gland, and the bolt is inserted through the center hole of the connecting sleeve and is threadedly connected to the tail of the conductor.

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