Arc extinguishing structure of high-voltage DC relay

Abstract

The invention discloses an arc extinguishing structure of a high-voltage DC relay. The arc extinguishing structure comprises an arc extinguishing chamber disposed at the upper portion of the high-voltage DC relay and used for accommodating a contact, a yoke cylinder disposed at the lower portion of the high-voltage DC relay and used for realizing a magnetic circuit function, and at least two magnetic steels distributed in the vicinity of the contact. The arc extinguishing chamber has a substantially rectangular shape. The yoke cylinder has a substantially circular shape. The yoke cylinder is provided with an upward height-increasing section which wraps the arc extinguishing chamber and the magnetic steels thereof. A yoke clamp is further installed where the magnetic steels are installed, and extends to the height-increasing section of the yoke cylinder form an overlapped part. Thus, the height-increasing section of the yoke cylinder can be used as a magnetic circuit carrier of the magnetic steels, and the portion of the yoke clamp replaced by the yoke cylinder is relatively reduced to provide space for the arc extinguishing chamber. The arc extinguishing structure can not only achieve a purpose of enhancing the magnetic field strength to achieve a good arc extinguishing effect, but also can reduce the occupation of the arc extinguishing space in the arc extinguishing chamber bythe yoke clamp, thereby ensuring the arc extinguishing effect of the arc extinguishing structure, and reducing the weight.

Description

technical field [0001] The invention relates to the technical field of relays, in particular to an arc extinguishing structure of a high voltage direct current relay. Background technique [0002] A DC relay in the prior art includes a contact part and a magnetic circuit part. The magnetic circuit part adopts a direct-acting magnetic circuit structure. The contact part is set on the upper part, and the magnetic circuit part is set on the lower part. Part of the moving spring part moves, and the moving spring part usually adopts a straight-type moving reed (also called a bridge-type moving reed). Terminal) contact and separation to achieve load connection and disconnection, while high-voltage DC relays usually need to set up an arc-extinguishing structure to realize the arc-extinguishing function. The high-voltage DC relays in the prior art usually use an arc extinguishing chamber and a magnetic steel as the arc extinguishing structure. The arc extinguishing chamber is a sea...

AI Technical Summary

Problems solved by technology

With the optimization and upgrading of high-voltage DC relays to small size and light weight, the shape of products is increasingly changing from rectangular to cylindrical; at the same time, in order to achieve high reliability of products, the original form of contact sealing can no longer meet the requirements , the product is developing in the direction of full sealing

However, due to the reduction in volume, the corresponding arc extinguishing space will be reduced

Especially in order to increase the strength of the magnetic field, the existing technology usually achieves this by adding a yoke clip to "bridge" connect two magnetic steels. The existing technology is to add a ring-shaped yoke jacket on the upper part of the high-voltage DC relay , used to connect two magnetic steels to achieve the purpose of enhancing the magnetic field strength. However, since the ring-shaped yoke clip is located around the contact part, it is bound to occupy the arc extinguishing chamber when the volume of the high-voltage DC relay does not increase. Space, resulting in the sacrifice of arc extinguishing space in polarized arc extinguishing design, which will affect the arc extinguishing effect

Images