High-voltage direct-current relay with reliable sealing structure

Abstract

The invention discloses a high-voltage direct-current relay with a reliable sealing structure, which comprises a metal base with an opening at the upper end and a rectangular structure, a square ring, an output end arranged on the metal base and a rectangular upper cover fixed at the upper end of the metal base through a screw, and is characterized in that a sleeve is fixedly mounted at the lower end part of an inner cavity of the metal base in a square shape; an inserting cylinder is movably inserted into the upper end of the sleeve, a plug is arranged at the lower end of the inserting cylinder and comprises a corrugated rubber plug and a cylindrical rubber plug, an air return hole is formed in the side face of the cylindrical rubber plug, and a first sealing ring and a second sealing ring are sequentially arranged on the upper end face of the metal base from inside to outside. An air return pipe and an air inlet pipe are arranged at the lower ends of the first sealing ring and the second sealing ring respectively. The service life of the high-voltage direct-current relay can be prolonged, the use safety of the high-voltage direct-current relay can be improved, the high-voltage direct-current relay can be achieved only through air compression, resource consumption does not need to be saved, and the resource utilization rate is increased.

Description

technical field [0001] The invention relates to the technical field of relay sealing, in particular to a high-voltage direct current relay with a reliable sealing structure. Background technique [0002] The high-voltage relay is an electrical appliance 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) of the high-voltage circuit meets the specified requirements. A high-voltage relay is an electronic control device, which has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is usually used in an automatic control circuit. The full sealing of the relay is to seal all the coils and contacts in a metal cover or a plastic cover. Considering the universal applicability in various industries and natural environments across the country, and taking into account the particularity of reliable operation for...

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Problems solved by technology

[0003] Most of the existing sealing structures of high-voltage relays adopt the method of sealing glue at the junction of the base and the shell to achieve the effect of product sealing. During long-term use, the glue is easy to dry and crack, resulting in unreliable sealing of high-voltage DC relays. , which affects the service life and safety of high-voltage DC relays, for this reason, we propose a high-voltage DC relay with a reliable sealing structure

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