High-capacity relay with auxiliary contact isolation mechanism

Abstract

The invention discloses a high-capacity relay with an auxiliary contact isolation mechanism, and belongs to the technical field of relays. Thehigh-capacity relay with an auxiliary contact isolation mechanismcomprises a shell, a push rod and an insulating plate, wherein the interior of the shell is divided into an upper containing cavity and a lower containing cavity through an isolation plate, a main contact is located in the upper containing cavity, an auxiliary contact is arranged in the lower containing cavity, the shell on the peripheral side of the lower containing cavity is provided with a detachable pull-out carrier plate, the upper end and the lower end of the pull-out carrier plate are fixedly provided with symmetrically-arranged installation guide plates, the installation guide plates are horizontally arranged, the auxiliary contact comprises an auxiliary movable contact and an auxiliary static contact, the auxiliary static contact is fixedly connected with the installation guide plate or the pull-out carrier plate, and the auxiliary movable contact is in transmission connection with the insulating plate. According to the invention, the main contact and the auxiliary contact can be effectively isolated, the requirements of the relay on the normally-open auxiliary contact and the normally-closed auxiliary contact can be met, the requirement of arranging a plurality of groups of auxiliary contacts can be met, the structure is simple, the relay is convenient to produce and assemble, and the isolation effect between the main contact and the auxiliary contact is relatively good.

Description

technical field [0001] The invention relates to the technical field of relays, in particular to a high-capacity relay with an auxiliary contact isolation mechanism. Background technique [0002] The relay is an electric control device that causes the controlled quantity to undergo a predetermined step change in the electrical output circuit when the change of the input quantity (excitation quantity) meets the specified requirements. circuit) and the controlled system (also known as the output circuit), which plays the role of automatic adjustment, safety protection and conversion circuit in the circuit. With the rise of green energy, high-capacity relays are widely used in high-voltage DC loads such as vehicles, photovoltaics, and charging piles. In view of the above-mentioned application scenarios of high-voltage DC loads, it is often necessary to set up auxiliary contacts to monitor the status of the main contacts and perform low-voltage Linkage control to improve the saf...

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Problems solved by technology

[0003] The traditional relay mainly adds a set of auxiliary contacts on the top of the ceramic cavity to realize the monitoring of the main contacts. The effect is poor. When the main contact breaks the load, the arc easily jumps to the auxiliary contact, causing high and low loads to connect, and even burns the auxiliary contact. The reliability of the relay cannot be guaranteed; the auxiliary contact form of this structure is single, only the normally open structure, and it is difficult to meet the requirements of the relay for the normally closed auxiliary contact; One set is set on the top. When multiple sets of auxiliary contacts need to be set, the relay structure will increase in size and complex structure; in addition, there is no effective isolation between the auxiliary contacts and the main contacts of traditional relays. When the main contacts are burnt by arcing , metal particles and other spatters may splash on the auxiliary contacts, which will cause the auxiliary contacts to fail, thereby affecting the reliability of the relay, which is not conducive to improving the market competitiveness of the product

[0004] At present, in the prior art, a high-capacity relay with an auxiliary contact isolation mechanism is disclosed in the patent application publication number CN 112331525 A. Although this solution can solve the above-mentioned problems, it mainly realizes the main relay through the isolator. The isolation of contacts and auxiliary contacts has a complex structure, which is not convenient for the production and assembly of relays; and there is a large through hole in the middle of the isolator, which makes the isolation effect between the main contacts and auxiliary contacts insufficient

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