Airflow control element with shielding function

A technology of airflow control and shielding components, which is applied in the direction of electrical components, high-voltage air circuit breakers, high-voltage/high-current switches, etc., can solve the problems of difficulty in breaking short-circuit current, airflow control components do not have shielding function, and deteriorate the insulation structure. Achieve the effect of solving the electric field intensity control requirements, improving the electric field distribution, and reducing the difficulty

Pending Publication Date: 2021-03-16
特变电工云集高压开关有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current self-supporting contact is composed of multi-lobe contact fingers, and there is a gap of about 1mm between adjacent petal contact fingers. The opening structure of about 1mm deteriorates its insulation structure, making it difficult to break the short-circuit current
Current airflow control elements are not shielded

Method used

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  • Airflow control element with shielding function
  • Airflow control element with shielding function
  • Airflow control element with shielding function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] In order to make the present invention more comprehensible, preferred embodiments are described in detail below with accompanying drawings.

[0026] Such as figure 2 As shown, an airflow control element 100 with a shielding function provided by the present invention is composed of a base 40 fired from polytetrafluoroethylene and a shielding element 30 embedded in the base 40. The base 40 has a ring structure, and the ring structure The outer circle diameter of the top end is smaller than the outer circle diameter of the bottom end. The base body 40 has a streamlined outer surface 10. A circular arc with a radius of R2 ~ R5 has a smooth transition.

[0027] The diameter of the inner circle at the top of the ring structure is smaller than the diameter of the inner circle at the bottom, and the inside of the ring structure is stepped, and the turning of the step adopts an arc with a radius of R2 to R5 for a smooth transition. The top of the ring structure is a throat ar...

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PUM

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Abstract

The invention discloses an airflow control element with a shielding function, one structure of the airflow control element is composed of a base body fired by a polytetrafluoroethylene material and ashielding element embedded in the base body, the base body is of an annular structure and is provided with a streamline outer surface, and the top of the base body is a throat area; and the other structure is formed by superposing a shielding substrate made of an aluminum material or a copper material or a steel material with an arc-combustion-resistant coating sprayed on the outer surface, and the top of the shielding substrate is a throat area. A shielding function is achieved while airflow is controlled, SF6 high-pressure airflow is guided and controlled in the large-current breaking process of a circuit breaker, the maximum field intensity under transient recovery voltage is controlled, and the control requirement of the high-voltage circuit breaker for the large-current breaking performance and the electric field intensity under the transient recovery voltage is met; the electric field distribution of the moving and static contacts under the transient recovery voltage is effectively improved, and the difficulty of the circuit breaker in breaking large current is reduced.

Description

technical field [0001] The invention relates to an airflow control element with a shielding function, belonging to the technical field of high-voltage electric equipment. Background technique [0002] High-voltage circuit breaker is an important device to ensure the safe operation of the power system. It is used to break the normal load current and short-circuit fault current of the circuit. When the short-circuit breaking current is as high as 50kA, 63kA, 80kA, 100kA or 120kA, the breaking task is very difficult for the circuit breaker. [0003] The breaking process of the circuit breaker is as follows: figure 1 shown. figure 1 a), the arc extinguishing chamber of the circuit breaker is in the closing position, the normal load current or short-circuit fault current is formed by the electrical connection formed by the moving main contact 4 and the static main contact 1, and the moving arc contact 3 and the static arc contact 2 flow on the electrical connection. figure 1 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/22H01H33/02
CPCH01H33/22H01H33/02
Inventor 孟维东常越汤伟魏俊梅王玉军殷福煜杨震张辉张聪明
Owner 特变电工云集高压开关有限公司
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