Micro semi-automatic ball valve

Abstract

The invention relates to a micro semi-automatic ball valve which comprises a hand wheel, an actuator, a valve rod, a valve body, a ball core, a valve seat, a seal ring and observation windows. The valve body is arranged on the top part of the ball valve; the valve body comprises an inlet and an outlet symmetrical left and right; the valve seat is arranged in the middle in the valve body; the ballcore is arranged on the valve seat; the valve rod is vertically arranged in the valve body; one end of the valve rod is connected onto the ball core; the other end of the valve rod is connected onto an output shaft of the actuator; the actuator is arranged on the upper part of the valve body; the hand wheel is connected to the upper part of the actuator; the multiple observation windows are arranged on the top part of the actuator; and the seal ring is arranged in the valve body. The micro semi-automatic ball valve provided by the invention is simple in structure, environmental-friendly, smallin water discharge, good in sealing performance, zero-leakage, wide in application range, wide in appropriate temperature range, sensitive in reaction, stable in working, and long in service life.

Description

technical field [0001] The invention relates to a valve, in particular to a miniature semi-automatic ball valve. Background technique [0002] At present, ordinary cryogenic ball valves generally adopt a one-way sealing structure, and a pressure relief hole is provided on the side wall of the ball corresponding to the upstream end of the valve body, so that when the ball is closed, the valve chamber is always connected with the upstream high-pressure medium to avoid accidents caused by low-temperature gasification of the medium. The stem part is set with a long neck structure, so that the sealing packing is away from the end of the ball, so as to ensure the sealing of the stem during the long-term switching process of the valve. The defect of this common cryogenic valve is: due to the long-term operation at low temperature, the main seal of the valve body only depends on the pre-tightened wound gasket seal, the service life is short, and the sealing packing at the top of the...

AI Technical Summary

Problems solved by technology

The defect of this common cryogenic valve is: due to the long-term operation at low temperature, the main seal of the valve body only depends on the pre-tightened wound gasket seal, the service life is short, and the sealing packing at the top of the valve stem is in a high and low temperature alternating state for a long time , the same short service life

And the ball valve is a floating ball design, only suitable for small diameter low pressure valves

The technicians of scientific research units and enterprises are constantly exploring and researching, hoping to develop a ball valve with superior performance. Although some progress has been made, there are still technical problems that have not been overcome in practical application.

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