CN114050040A

CN114050040A - Large-capacity three-phase voltage transformer

Info

Publication number: CN114050040A
Application number: CN202111407165.7A
Authority: CN
Inventors: 张涛; 冷联; 姚丽敏
Original assignee: Zhenjiang Dangao Electric Equipment Co ltd
Current assignee: Zhenjiang Dangao Electric Equipment Co ltd
Priority date: 2021-11-24
Filing date: 2021-11-24
Publication date: 2022-02-15

Abstract

The utility model provides a three-phase voltage transformer of large capacity includes mutual-inductor base and mutual-inductor casing, the mutual-inductor casing constitute by last casing and lower casing, last casing on be equipped with three spliced poles that crisscross distributes, be equipped with transmission box and outside convex winding chamber on the casing down, winding chamber and spliced pole one-to-one, the spliced pole pass behind the last casing and link to each other with the internal iron core of inferior valve, the periphery of iron core is equipped with the winding that is located the winding intracavity. This voltage transformer has set up a plurality of outside convex winding chambeies on the casing down, has increased voltage transformer's inner space, under the enough big condition in inner space, only needs increase iron core cross-section and winding number of turns can satisfy the operation requirement of voltage transformer large capacity to link to each other through the spliced pole with iron core and crisscross setting, make voltage transformer's inner space obtain make full use of, further improved voltage transformer's capacity.

Description

Large-capacity three-phase voltage transformer

Technical Field

The invention relates to a voltage transformer, in particular to a large-capacity three-phase voltage transformer.

Background

The voltage transformer is a common device in a power system or an electrical control system, and is mainly used for supplying power to a measuring instrument and a relay protection device, measuring the voltage, the power and the electric energy of a line, or protecting valuable devices, motors and transformers in the line when the line fails. The existing voltage transformer mainly comprises a primary coil, a secondary coil, an iron core and an insulating shell, and cannot meet the use requirements of small volume and large capacity in the use process.

Disclosure of Invention

The invention provides a large-capacity three-phase voltage transformer for solving the defects of the prior art.

The utility model provides a three-phase voltage transformer of large capacity includes the mutual-inductor base and installs the mutual-inductor casing on the mutual-inductor base, the mutual-inductor casing constitute by last casing and the lower casing that links to each other, last casing on be equipped with three spliced poles that crisscross distributes, be equipped with the sawtooth groove between two adjacent spliced poles, be equipped with the insulating layer on the inner wall of casing down, be equipped with power transmission box and outside convex winding chamber on the outside terminal surface of casing down, the quantity in winding chamber is the same with the quantity of spliced pole to the position in winding chamber and the position one-to-one of spliced pole, the spliced pole pass behind the last casing with the internal iron core of inferior valve link to each other, the periphery of iron core is equipped with the winding that is located the winding intracavity.

Furthermore, four threaded mounting holes are uniformly distributed on the mutual inductor base.

Furthermore, the upper shell and the lower shell are connected through an insulating bolt.

Furthermore, the joint of the upper shell and the lower shell is provided with airtight rubber.

Furthermore, at least one side of the winding cavity is provided with a protective cooling fin.

Furthermore, the inside of lower casing still is equipped with the fixed plate that is used for fixed iron core, be equipped with the vacuum plate on the bottom surface of fixed plate.

Has the advantages that: the invention discloses a large-capacity three-phase voltage transformer, which is characterized in that a plurality of winding cavities protruding outwards are additionally arranged on a lower shell, the internal space of the voltage transformer is increased, the use requirement of the large capacity of the voltage transformer can be met only by increasing the section of an iron core and the number of winding turns under the condition that the internal space is large enough, the internal space of the voltage transformer is fully utilized by connecting the iron core with staggered connecting columns, and the capacity of the voltage transformer is further improved.

Drawings

FIG. 1 is a front view of a three-phase voltage transformer;

FIG. 2 is a top view of a three-phase voltage transformer;

FIG. 3 is a schematic view of the internal structure of the lower case;

in the figure: 1. the transformer comprises a transformer base 11, a threaded mounting hole 2, a transformer shell 21, an upper shell 22, a lower shell 221, an iron core 222, a fixing plate 223, a vacuum plate 23, an insulating bolt 24, airtight rubber 3, a connecting column 4, a sawtooth groove 5, an insulating layer 6, a power transmission box 7, a winding cavity 71, a winding 72 and a protective cooling fin.

Detailed Description

For the purpose of enhancing the understanding of the present invention, the present invention will be described in further detail with reference to the following examples and the accompanying drawings, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention.

As shown in fig. 1-3, a three-phase voltage transformer of large capacity includes mutual-inductor base 1 and installs mutual-inductor housing 2 on mutual-inductor base 1, mutual-inductor housing 2 constitute by continuous last casing 21 and lower casing 22, last casing 21 on be equipped with three spliced pole 3 that distribute crisscross, be equipped with serration groove 4 between two adjacent spliced pole 3, be equipped with insulating layer 5 on the inner wall of casing 22 down, be equipped with power transmission box 6 and outside convex winding chamber 7 on the outside terminal surface of casing 22 down, the quantity of winding chamber 7 is the same with spliced pole 3's quantity to the position one-to-one of winding chamber 7 and spliced pole 3's position, spliced pole 3 pass last casing 21 after and link to each other with iron core 221 in the casing 22 down, the periphery of iron core 221 is equipped with the winding 71 that is located winding chamber 7.

In this embodiment, four threaded mounting holes 11 are uniformly distributed on the transformer base 1.

In this embodiment, the upper housing 21 and the lower housing 22 are connected by an insulating bolt 23.

In this embodiment, an airtight rubber 24 is disposed at the joint of the upper housing 21 and the lower housing 22.

In this embodiment, at least one side of the winding cavity 7 is provided with a protective heat sink 72.

In this embodiment, a fixing plate 222 for fixing the core 221 is further disposed inside the lower housing 22, and a vacuum plate 223 is disposed on a bottom surface of the fixing plate 222.

This voltage transformer has set up a plurality of outside convex winding chambeies on the casing down, voltage transformer's inner space has been increased, under the enough big condition in inner space, only need increase iron core cross-section and winding number of turns can satisfy the operation requirement of voltage transformer large capacity, and link to each other through the spliced pole with iron core and crisscross setting, make voltage transformer's inner space obtain make full use of, voltage transformer's capacity has further been improved, this voltage transformer adopts vacuum closed structure in addition, through add the sawtooth groove between two adjacent spliced poles, voltage transformer's creepage distance has been increased, voltage transformer's safety in utilization has been improved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a three-phase voltage transformer of large capacity, its characterized in that includes the mutual-inductor base and installs the mutual-inductor casing on the mutual-inductor base, the mutual-inductor casing constitute by continuous last casing and lower casing, last casing on be equipped with three spliced poles that crisscross distributes, be equipped with the sawtooth groove between two adjacent spliced poles, be equipped with the insulating layer on the inner wall of casing down, be equipped with power transmission box and outside convex winding chamber on the outside terminal surface of casing down, the quantity in winding chamber is the same with the quantity of spliced pole to the position one-to-one of winding chamber and spliced pole, the spliced pole pass behind the last casing with the internal iron core of inferior valve link to each other, the periphery of iron core is equipped with the winding that is located the winding intracavity.

2. The three-phase voltage transformer with large capacity according to claim 1, characterized in that four threaded mounting holes are uniformly distributed on the transformer base.

3. A large capacity three-phase voltage transformer according to claim 1, wherein said upper and lower cases are connected by means of insulating bolts.

4. The large capacity three-phase voltage transformer recited in claim 1 wherein the junction of said upper and lower housings is provided with airtight rubber.

5. A high capacity three phase voltage transformer according to claim 1 wherein said winding chamber is provided with protective fins on at least one side.

6. A large capacity three-phase voltage transformer according to claim 1, wherein a fixing plate for fixing the core is further provided inside the lower case, and a vacuum plate is provided on a bottom surface of the fixing plate.