Diaphragm type automatic control intermittent valve

Abstract

The invention discloses a diaphragm type self-control intermittent valve which comprises a screw, an upper spring seat, a lower spring seat, a spring, a bearing sleeve, a piston, a stem valve, a valve seat, a valve plug, a diaphragm, a valve body, a needle valve, a bearing ring, a big spring and a valve deck. The piston is located in the valve body. The stem valve is inserted into the piston. The lower end of the valve body is provided with the valve seat. The stem valve is in butt joint with the valve seat. The bearing sleeve, the spring and the bearing ring are arranged outside an upper end stem of the stem valve and in an upper end hole in the piston. The needle valve is arranged in the valve body. The diaphragm is arranged in a right lower cavity of the valve body. Hydraulic oil is injected in the lower portion of the piston and the upper portion of the diaphragm. The valve plug and the valve body are fixed in a sealed manner. The screw is in linkage with the valve deck. The upper spring seat is fixed into the valve deck. The big spring is arranged in the upper spring seat. The lower spring seat is arranged in the valve deck. According to the diaphragm type self-control intermittent valve, intermittent control is finished through the pressure of liquid, working is stable and reliable, the intermittent time of the intermittent valve can be adjusted through the needle valve; and the intermittent valve is compact in overall structure, small in size, light and convenient to assemble, the cost is lowered by over 30% compared with a traditional intermittent valve, and the service life is doubled.

Description

technical field [0001] The invention relates to the technical field of water spray and dust removal valves in coal mines, in particular to an automatic control intermittent valve. Background technique [0002] The dust in the coal mine will cause great harm to the mine and the operators, so the dust removal work must be carried out in the coal mine. The more commonly used dust removal and water spraying devices in coal mines are intermittent valves, which generally adopt air control or electric control, and the structure and control process are relatively complicated. [0003] The current intermittent valve utilizes the difference in time between the quantitative water entering the upper chamber and the time required to discharge the quantitative water, as well as the self-controlled opening and closing of the valve to realize intermittent automatic circulation. The quantitative water entering the upper chamber enters after overcoming the resistance of the piston under a ce...

AI Technical Summary

Problems solved by technology

The main defect is that the interval time can only be adjusted by disassembling the valve body, and when the interval time is adjusted longer, the damping hole is easy to be fouled and blocked, causing intermittent failures and causing safety hazards to coal mines

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