CN210110502U

CN210110502U - Special voltage transformer in air chamber of inflating cabinet

Info

Publication number: CN210110502U
Application number: CN201921476860.7U
Authority: CN
Inventors: 张才丽; 潘志清; 刘杰
Original assignee: Sky And Water Chang Kai Instrument Transformer Manufacturing Co Ltd
Current assignee: Sky And Water Chang Kai Instrument Transformer Manufacturing Co Ltd
Priority date: 2019-09-05
Filing date: 2019-09-05
Publication date: 2020-02-21
Anticipated expiration: 2029-09-05

Abstract

The utility model discloses a special voltage transformer in gas chamber of gas insulated switchgear relates to the voltage transformer field. The voltage transformer comprises a metal shell, a bottom plate and a voltage transformer main body, wherein the bottom of the metal shell is connected with the bottom plate, the voltage transformer main body is poured and coated in the metal shell through epoxy resin, and an observation window cover plate is arranged in the middle of the upper part of the metal shell; the left side of the upper portion of the metal shell is provided with a PT plug, the right end of the PT plug is connected with a primary connecting piece, the primary connecting piece is in threaded connection with the right end of the PT plug, and the left side of the lower portion of the metal shell is provided with a secondary outgoing line which directly penetrates out. The product of the utility model is a single-phase metal armored epoxy resin totally-enclosed type pouring insulation structure, which is suitable for the air chamber of an air charging cabinet, and is mainly installed in SF6 gas, and the PT plug is a cone-shaped structure made of soft silica gel material, thereby ensuring reliable sealing; the fuse tube is embedded inside, so that the mutual inductor is prevented from being damaged.

Description

Special voltage transformer in air chamber of inflating cabinet

Technical Field

The utility model relates to a voltage transformer field, concretely relates to aerify special voltage transformer in cabinet air chamber.

Background

The voltage transformer is used in 10KV high-voltage equipment such as switch cabinets, switchboards and the like, transmits information to various measuring instruments, measuring instruments and relay protection and control devices, serves as an operation power supply of electric operating mechanisms, temperature and humidity controllers, fans and the like in the high-voltage equipment, and serves as an important device of various measuring instruments, measuring instruments and relay protection. As a junction for connecting an electric secondary circuit with a primary system, the voltage transformer can isolate instruments, relay protection systems and operators from a high-voltage system, so that the power utilization safety of the secondary circuit is ensured and the safety threat to the operators is avoided.

The environment of the power system is complex and unstable, for the voltage transformer, the overvoltage, the overcurrent and other complex conditions can occur at any time in the system, the overvoltage can burn the voltage transformer,

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a special voltage transformer in gas insulated switchgear air chamber that gas tightness is good, difficult burning out.

The utility model provides a technical scheme is: a special voltage transformer in an air chamber of an inflatable cabinet comprises a metal shell, a bottom plate and a voltage transformer main body, wherein the bottom of the metal shell is connected with the bottom plate, the voltage transformer main body is cast and coated in the metal shell through epoxy resin, and an observation window cover plate is arranged in the middle of the upper part of the metal shell; metal casing upper portion left side is equipped with the PT end cap, and metal casing upper portion right side is equipped with the PT plug, PT plug right-hand member is connected with a connecting piece, a connecting piece with the right-hand member threaded connection of PT plug, there is the secondary in metal casing lower part left side to be qualified for the next round of competitions and directly wears out, upper portion in the metal casing is equipped with a fixed inserts, a fixed inserts right-hand member is fixed with the fuse-link, the fuse-link left end is connected with the voltage transformer main part, and the fuse-link right-hand member is equipped with the second spring, the second spring right-hand member is connected with a connector, the right-hand member of a connector stretches into a connecting piece and is equipped with first spring, first.

Further, the shape of the PT plug adopts a conical structure.

Further, the PT plug is made of soft silica gel.

Furthermore, semiconductor substances are uniformly coated on the inner wall of the metal shell.

Furthermore, semiconductor materials are wrapped on the primary side and the secondary side of the voltage transformer body.

Furthermore, a connecting screw is arranged at the left end of the primary connecting body and screwed into the primary connecting body, and the head of the connecting screw is positioned in the spiral of the second spring.

Compared with the prior art, the beneficial effects of the utility model are that: the product of the utility model is a single-phase metal armored epoxy resin totally-enclosed type pouring insulation structure, which is suitable for an air chamber of an air inflation cabinet and is mainly installed and used in an SF6 air cabinet, and a PT plug is a conical structure made of soft silica gel material and is installed and inserted into the air chamber to be pushed inwards and tighter along with installation until being locked to ensure reliable sealing; the fuse tube is embedded inside the transformer, so that the mutual inductor can be effectively prevented from being damaged and burnt when fluctuating overvoltage occurs; and the semiconductor material is adopted to shield the electric field in the product, so that the partial discharge of the product is ensured to meet the requirements.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the metal casing of the present invention.

Reference numerals: the voltage transformer comprises a metal shell 1, a bottom plate 2, a PT plug 3, a PT plug 4, a PT plug 5, an observation window cover plate 6, a first spring 7, a secondary outlet wire 8, a primary connecting piece 9, a voltage transformer main body 10, a fuse tube 11, a second spring 12, a primary fixing insert 13, a connecting screw 13 and a primary connecting piece 14.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the specific embodiments.

As shown in fig. 1-2, a special voltage transformer in an air chamber of an inflatable cabinet comprises a metal shell 1, a bottom plate 2 and a voltage transformer main body 9, wherein the bottom of the metal shell 1 is connected with the bottom plate 2, the voltage transformer main body 9 is poured and coated in the metal shell 1 through epoxy resin, and an observation window cover plate 5 is arranged in the middle of the upper part of the metal shell 1; the left side of 1 upper portion of metal casing is equipped with PT end cap 3, and metal casing upper portion right side is equipped with

PT plug

4, 4 right-hand members of PT plug are connected with a connecting piece 8, a connecting piece 8 with the right-hand member threaded connection of

PT plug

4, 1 lower part left side of metal casing has secondary 7 of being qualified for the next round of competitions and directly wears out, upper portion in the metal casing 1 is equipped with once fixed inserts 12, once fixed inserts 12 right-hand member is fixed with fuse-link 10, fuse-link 10 left end is connected with voltage transformer main part 9, and fuse-link 10 right-hand member is equipped with second spring 11, second spring 11 right-hand member is connected with once connector 14, the right-hand member of once connector 14 stretches into a connecting piece 8 and is equipped with first spring 6, first spring 6 wears out outside a connecting piece.

The shape of the PT plug 4 adopts a conical structure, and the PT plug 4 is made of soft silica gel; the inner wall of the metal shell 1 is uniformly coated with semiconductor materials, and the primary side and the secondary side of the voltage transformer main body 9 are wrapped with semiconductor materials. The left end of the primary connecting body 14 is provided with a connecting screw 13, the connecting screw 13 is screwed into the primary connecting body 14, and the head of the connecting screw 13 is positioned inside the spiral of the second spring 11.

A voltage transformer main body 9 is coated outside epoxy resin in a metal shell 1, the lower portion of the voltage transformer main body 9 is a secondary side, a secondary outlet 7 directly penetrates out of the lower portion of a shell of the metal shell 1, a fusing tube 10 is connected to the primary side of the upper portion of the voltage transformer main body 9, the fusing tube 10 prevents fluctuating overvoltage from burning the voltage transformer, and the fusing tube is connected with a second spring 11, a connecting screw 13, a primary connecting body 14, a primary connecting piece 8 and a first spring 6.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience of describing the present patent and for simplification of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present patent. It should be noted that unless otherwise expressly specified or limited, the terms "mounted," "connected," and "disposed" are intended to be broadly construed and include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed.

The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims

1. A special voltage transformer in an air chamber of an inflatable cabinet comprises a metal shell, a bottom plate and a voltage transformer main body, wherein the bottom of the metal shell is connected with the bottom plate, the voltage transformer main body is cast and coated in the metal shell through epoxy resin, and an observation window cover plate is arranged in the middle of the upper part of the metal shell; metal casing upper portion left side is equipped with the PT end cap, and metal casing upper portion right side is equipped with PT plug, its characterized in that: the PT plug right-hand member is connected with a connecting piece, a connecting piece with the right-hand member threaded connection of PT plug, metal casing lower part left side has the secondary to be qualified for the next round of competitions and directly wears out, upper portion in the metal casing is equipped with once fixed inserts, once fixed inserts right-hand member is fixed with the fuse-link, the fuse-link left end is connected with the voltage transformer main part, and the fuse-link right-hand member is equipped with the second spring, the second spring right-hand member is connected with a connector, the right-hand member of a connector stretches into a connecting piece and is equipped with first spring, first spring wears out outside a connecting piece.

2. The special voltage transformer in the air chamber of the inflatable cabinet as claimed in claim 1, wherein: the shape of the PT plug adopts a conical structure.

3. The special voltage transformer in the air chamber of the inflatable cabinet as claimed in claim 1, wherein: the PT plug is made of soft silica gel.

4. The special voltage transformer in the air chamber of the inflatable cabinet as claimed in claim 1, wherein: and the inner wall of the metal shell is uniformly coated with a semiconductor substance.

5. The special voltage transformer in the air chamber of the inflatable cabinet as claimed in claim 1, wherein: the primary side and the secondary side of the voltage transformer main body are wrapped with semiconductor materials.

6. The special voltage transformer in the air chamber of the inflatable cabinet as claimed in claim 1, wherein: the left end of the primary connecting body is provided with a connecting screw, the connecting screw is screwed into the primary connecting body, and the head of the connecting screw is positioned in the spiral of the second spring.