Composition and classification of explosion-proof solenoid valve

Composition and classification of explosion-proof solenoid valves

1. The composition of explosion-proof solenoid valve

A part of the oil circuit board of the explosion-proof solenoid valve is enclosed in a sealed tube, which is composed of a rotary vane pump core, a ferrule, and a torsion spring base. The magnetic induction component of the explosion-proof solenoid valve is composed of fixed transformer iron core, moving coil, electromagnetic coil and other components, and the magnet coil is immediately installed on the oil circuit board. In that way, a part of the oil circuit board and a part of the magnetic induction form another simple and compact part.

2. Classification of explosion-proof solenoid valves

(1) Classified according to the substances in the controlled pipelines and their application working conditions

Explosion-proof solenoid valve can be divided into normally closed explosion-proof solenoid valve, gas explosion-proof solenoid valve, electric globe valve, pulse solenoid valve, normally closed explosion-proof solenoid valve, fire safety special explosion-proof solenoid valve, Refrigeration explosion-proof solenoid valve, anti-corrosion explosion-proof solenoid valve, pneumatic gate valve, high-pressure solenoid valve, explosion-proof solenoid valve without pressure difference, low-temperature explosion-proof solenoid valve (hydrogen production vehicle valve), vacuum valve, etc.

(2) Classification according to the driving method of the electromagnetic coil

Explosion-proof solenoid valve can be divided into dominant type, straight-moving type, compound type, recoil type, self-sustaining type, single pulse type, monostable and so on according to the driving method of the solenoid coil.

(3) Classification according to the working mode of gate valve

Explosion-proof solenoid valve is divided into two types: normally closed type and open and closed type according to the working mode of gate valve. The normally closed type means that the gate valve is closed when the solenoid coil is not powered, and the open and closed type means that the gate valve is open when the solenoid coil is powered off.

(4) Classification by internal structure

According to the internal structure, explosion-proof solenoid valves can be divided into three-position three-way valve, three-position valve, three-position valve, three-position two-way valve, etc. Among them, the three-position three-way valve explosion-proof solenoid valve will have one air inlet (liquid) hole and another exhaust (liquid) hole, and the liquid three-position solenoid valve will have one leakage hole and two liquid outlet holes. (The other is on and off, the other is normally closed), the three-position electromagnetic directional valve for pneumatics will have one air inlet and outlet, another air outlet, and one air outlet, and the normally closed (hydraulic) three-position electromagnetic directional valve will have One into the oil inlet, the other outlet, and the other return to the oil inlet.

(5) Classification by applied materials

Explosion-proof solenoid valve can be divided into pig iron body (gray cast iron, ductile iron), copper body (copper cast, forged copper), cast steel body, all stainless steel plate body (258, 741), non-metallic body according to the application materials of explosion-proof solenoid valve Various materials (ASR, thermoplastic polyurethane) are available.

(6) Classification according to the working pressure of the substances in the pipeline

The explosion-proof solenoid valve can be divided into vacuum pump type (0.16～0MPa), low voltage type (0～0.5MPa), medium pressure arc (3.1～4.5MPa), high pressure type (7.2～8.9MPa) according to the working pressure of the substance in the pipeline. , High pressure type (11 ~ 29MPa) variety.

(7) Classification by material temperature

Explosion-proof solenoid valve can be divided into normal temperature type (5～120℃), medium hot end (110～130℃), high temperature type (130～225℃), high temperature and high pressure type (240～850℃), ultra-low temperature type (240～850℃) according to the material temperature. 25～0℃) and low temperature type (149℃).