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A kind of production method of high voltage direct current contactor

A high-voltage direct current, production method technology, applied in the direction of measuring the acceleration and deceleration rate of fluid, instruments, relays, etc., can solve the problems of unstable overall state, easy arc phenomenon, damage to internal components, etc., so as to reduce production costs. , high stability, high security effect

Active Publication Date: 2019-05-14
旭格威科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] like Figure 4 As shown, when the high-voltage DC contactor is running, arcing is likely to occur in the closed inner cavity 18 inside it, resulting in damage to internal components. In the prior art, inert gas is injected into the closed inner cavity 18 to protect the closed inner cavity. For the components in the chamber 18, the existing inert gas generally uses hydrogen gas. However, due to its own characteristics, the overall state of hydrogen gas is not very stable. The high voltage DC contactor is welded by various components, so the overall sealing performance of the high voltage DC contactor varies with As the use time increases, certain problems often occur in the sealing of the internal closed cavity 18, which may easily lead to hydrogen leakage. After the leaked hydrogen and air are mixed, there will be explosions and other dangerous situations when encountering an open flame. The existing high-voltage direct current The safety of the contactor needs to be improved, and there are improvements

Method used

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  • A kind of production method of high voltage direct current contactor
  • A kind of production method of high voltage direct current contactor
  • A kind of production method of high voltage direct current contactor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A production method of a high-voltage DC contactor, specifically comprising the following steps:

[0033] Such as Figures 1 to 5 As shown, assemble the packing: pre-install the static electrode porcelain shell parts, the bottom plate assembly and the moving magnetic core assembly in the sealed cavity 10 of a welding mold 9 according to the structure of the existing high-voltage DC contactor. The welding mold 9 includes The welding mold housing 91 and the welding mold cover 92 are composed, and the sealing cavity 10 is located in the welding mold housing 91. Specifically, by placing two left and right positioning molds 14 in the sealing cavity 10, the above positioning molds 14 abut, fix and seal Flange 3 and insulating porcelain shell 2, so that the entire contactor can be placed upright in the welding mold 9, between the sealing flange 3 and the insulating porcelain shell 2, the static electrode 1 and the insulating porcelain shell 2, and the sealing flange 3 Welding...

Embodiment 2

[0042] The difference from Example 1 lies in the volume ratio between hydrogen and helium. In this solution, hydrogen and helium with a volume ratio of 2:3 are mixed to prepare an inert mixed gas.

Embodiment 3

[0044] The difference from Example 1 lies in the volume ratio between hydrogen and helium. In this solution, hydrogen and helium with a volume ratio of 3:7 are mixed to prepare an inert mixed gas.

[0045] To sum up, the comparison between the three embodiments shows that the volume ratio of the third embodiment can better protect the components in the closed inner cavity and facilitate mass spectrometry analysis, which improves the overall safety and avoids hydrogen leakage and explosion. It is beneficial to the real-time detection of product airtightness, preferred embodiment three.

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Abstract

The invention discloses a production method of a high-voltage DC contactor. By adopting the technical scheme, compared with the condition that a single inert gas hydrogen is introduced in the prior art, a certain ratio of hydrogen and helium are introduced into a closed inner cavity in the high-voltage DC contactor, the helium has relatively high stability, the hazardous conditions of explosion and the like are not easily generated, and meanwhile, whether a leakage condition exists or not is detected through continuously introducing a mixed gas and combining with a mass spectrum analyzer by using a positive voltage detection method in a product production process, thereby determining the air-tightness of the high-voltage DC contactor. The detection method is simple, and the production efficiency is improved while relatively high security of a product is kept.

Description

technical field [0001] The invention relates to a production method of an automatic control system component, more specifically, to a production method of a high-voltage direct current contactor. Background technique [0002] A DC contactor is a contactor used in a DC circuit, corresponding to an AC contactor, and generally has a main contact, an auxiliary contact and a coil contact. It is suitable for many new energy fields such as program-controlled power supply or uninterruptible power supply system, forklift, electric vehicle, mobile electric charging pile; when the contactor coil is energized, the coil current generates a magnetic field, so that the static iron core generates electromagnetic attraction to attract the moving iron core, And drive the contact action: the normally closed contact is disconnected, the normally open contact is closed, and the two are linked. When the coil is powered off, the electromagnetic attraction disappears, and the armature is released ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H49/00G01M3/32G01N27/62
CPCG01M3/32G01N27/62H01H49/00
Inventor 黄秋平郑旭光
Owner 旭格威科技(上海)有限公司
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