Pilot electromagnetic valve

Abstract

The invention discloses a pilot electromagnetic valve which comprises a base, an upper shell, an electromagnet outer shell, a guide head, a coil, static iron core, a magnetic isolation pipe, a movingiron core and a round cap nut. The upper shell is fixed to the upper portion of the base through a bolt A, and an electromagnet outer shell is arranged on the upper portion of the upper shell. A guidegroove is formed in the base, the guide head is mounted in the guide groove, and the upper portion of the guide head is connected with a spring A. Two u-shaped grooves are formed in the upper portionand the lower portion of the guide head, an upper cavity and a lower cavity are formed between the two u-shaped grooves and the guide groove, a nylon strip is arranged in the upper cavity, and the lower cavity communicate with the guide groove space on the upper portion of the guide head through a pilot hole. A groove is formed in the upper portion of the upper shell and is connected with the guide groove through a communicating hole, an air-bleed hole is formed in the bottom of the groove, and the air-bleed hole communicates with an exhaust hole through the upper shell and a gas channel arranged in the base. Generally, safety and reliability of the pilot electromagnetic valve used in a high-pressure pipeline can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of valves, in particular to a pilot solenoid valve. Background technique [0002] Solenoid valves are often used in HVAC, refrigeration and other systems involving temperature control and regulation. The main principle is to use the electromagnetic force generated after the coil is energized to control the up and down movement of the core iron, so that the solenoid valve can be opened or closed in the air conditioning system. Close, so as to control the on-off of the medium in the pipeline system. With the gradual increase of personal housing area and the increase of large shopping malls and other buildings, the demand for large-capacity air-conditioning units is gradually increasing. In such large-capacity air-conditioning units, the requirements for solenoid valves are also getting higher and higher. The pressure received is increasing. Ordinary direct-acting solenoid valves can no longer meet such worki...

AI Technical Summary

Problems solved by technology

Ordinary direct-acting solenoid valves can no longer meet such working conditions due to the limitation of the valve caliber. When the pressure on the solenoid valve is too large, ordinary direct-acting solenoid valves are prone to leakage, which cannot meet the valve control work of high-pressure pipelines. , its safety and reliability in the use of high-pressure pipelines cannot be guaranteed

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