Electromagnetic valve resistant to oil pollution

Abstract

An electromagnetic valve resistant to oil pollution comprises a valve body, a first steel ball, a first valve, a first electromagnet, a second steel ball, a second valve, a second electromagnet and the like, wherein the second electromagnet is vertically installed on a support, the support is installed on the upper portion of a shell body, the valve body is installed on the lower portion of the shell body, the support is provided with an inner hole, and a balance weight is installed in the inner hole of the support and can vertically move in the hole; the first electromagnet is installed and fixed to the side portion of the valve body; a piston is installed in the shell body, and piston rods are installed at the upper end and the lower end of the piston; the lower end of an iron core of the second electromagnet is connected together with the piston rod on the upper portion of the piston, the piston rod on the lower portion of the piston is installed in the central inner hole in the lower portion of the shell body, the lower end of the piston rod on the lower portion of the piston is connected together with the upper portion of a valve element, the piston in the shell body can move to drive the valve element and the balance weight to move at the same time, and the piston is installed in an inner cavity of the shell body. The electromagnetic valve has electromagnetic, hydraulic and manual multi-input control functions, is high in integration level and anti-pollution capacity, simple in structure and convenient to maintain, and can safely and reliably implement multi-mode combined control.

Description

technical field [0001] The invention belongs to the field of solenoid valves, in particular to an anti-oil pollution solenoid valve. Background technique [0002] The existing ordinary solenoid valves have high requirements on the quality of hydraulic oil, especially the solid particles contained in the oil directly affect the working performance of the solenoid valve, causing the solenoid valve core to jam and refuse to move. [0003] The turbine oil system of a hydropower station is usually composed of a speed control system oil system and a bearing lubricating oil system. Due to the friction of the bearing system and the contact between the lubricating oil and the air, there are many solid particles and sludge in the oil. Normal operation in such a heavily oil-polluted environment. If the overspeed protection solenoid valve of the hydropower unit is stuck astringent , Refusal to move, it will affect the normal operation of the speed control system, and even endanger the...

AI Technical Summary

Problems solved by technology

[0002] The existing ordinary solenoid valves have high quality requirements for hydraulic oil, especially the solid particles contained in the oil directly affect the working performance of the solenoid valve, causing the solenoid valve core to jam and refuse to move.

[0003] The turbine oil system of a hydropower station is usually composed of a speed control system oil system and a bearing lubricating oil system. Due to the friction of the bearing system and the contact between the lubricating oil and the air, there are many solid particles and sludge in the oil. Normal operation in such an environment with severe oil pollution

If the overspeed protection solenoid valve of the hydropower unit is stuck astringent , Refusal to move, it will affect the normal operation of the speed control system, and even endanger the safe and stable operation of the entire unit

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