Pilot-operated type electromagnetic valve capable of resisting high temperature and high pressure

Abstract

The invention provides a pilot-operated electromagnetic valve capable of resisting high temperature and high pressure. The electromagnetic valve adopts a pilot-operated structure, and comprises a pilot part, a coil part, a movable iron core, a pilot hole, a main valve part, elastic piston rings, a main valve positioning rod, sealing parts and the like, wherein the pilot part is provided with the movable iron core, the coil part is wound on the surface of a column body above the movable iron core, and the pilot hole is formed in the pilot part; a certain gap is formed between the main valve part and a valve wall, sealing grooves are symmetrically formed in the main valve part, and the elastic piston rings are placed in the sealing grooves; and metal materials such as silver-based materials and copper-based materials are added during the production of the sealing parts; and the main valve positioning rod is located right below the main valve part. Compared with the prior art, the electromagnetic valve is simple in structure and convenient to use, the high-temperature-resistant and high-pressure-resistant capacities of the electromagnetic valve are greatly improved, the highest temperature that the electromagnetic valve can resist is 450 DEG C, the maximum pressure that the electromagnetic valve can resist is 100 MPa, and the safety and reliability of products are effectively guaranteed.

Description

technical field [0001] The invention relates to a solenoid valve, in particular to a pilot-operated high-temperature and high-pressure solenoid valve. Background technique [0002] Solenoid valves have always been a difficult technical problem in the industry. The difficulty is mainly reflected in the pressure bearing of the valve body, valve cover, welded structure and the selection of seals. Ordinary solenoid valves have the following defects: First, the bonnet parts are assembled by welding parts such as static iron core and valve stem, but the welded parts cannot withstand the impact of ultra-high pressure, the pressure resistance is very poor, and often breaks etc., causing the solenoid valve to fail to continue to work normally, and even lead to safety accidents; second, under high temperature conditions, the thermal expansion and contraction between the main valve and the valve wall cause the gap to change, affecting the inconsistency of the speed of the medium enteri...

AI Technical Summary

Problems solved by technology

[0004] The technical problem solved by the present invention is to provide a pilot-operated high-temperature and high-pressure solenoid valve to solve the problems of poor high temperature resistance, poor pressure resistance and easy safety accidents of ordinary solenoid valves

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