Valve element assembly

Abstract

The invention provides a valve element assembly. The valve element assembly comprises a valve sleeve, an ejector rod and a valve element. The valve sleeve is formed in the manner that a liquid return valve sleeve is in butt joint with a liquid inlet valve sleeve. A liquid return cavity is formed in the liquid return valve sleeve, a pressure cavity is formed in the liquid inlet valve sleeve, and a valve seat with a first inclined face is further tightly mounted in the liquid inlet valve sleeve. The ejector rod is axially inserted in the middle of the liquid return valve sleeve, and the head end of the ejector rod stretches out of the liquid return valve sleeve. The valve element is axially inserted in the middle of the liquid inlet valve sleeve, and the head end of the valve element stretches into the liquid return valve sleeve. A second inclined face is arranged on the outer wall of the valve element, and a connecting channel is defined by the first inclined face and the second inclined face. A spring is arranged on the outer portion of the valve element in a sleeving manner, the ejector rod can push the valve element to shift axially and enables the second inclined face to be separated from the first inclined face, and the liquid return cavity is connected with the pressure cavity at this moment; and external force of the ejector rod is removed, under the action of restoring force of the spring, the valve element resets, the second inclined face is tightly attached to the first inclined face again, and the liquid return cavity is disconnected with the pressure cavity at this moment. The valve element assembly has the beneficial effects of being tight in connection and reliable in work.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a valve core assembly. Background technique [0002] Various valve structures are used in mining hydraulic systems. In the prior art, in the valve core assembly composed of valve sleeve, ejector rod, valve core, etc., soft sealing structures such as sealing rings are usually used between the valve core and the valve sleeve. , when the ejector rod moves and makes the return chamber and the pressure chamber of the valve conduct, open the joint between the above-mentioned valve core and the valve sleeve and make the soft seal structure in an open state. Such a soft seal structure is easy to corrode after long-term use. When the spool and the valve sleeve cannot guarantee the tightness of the connection, especially in the mining environment, the reliability of the overall spool assembly will be reduced. For this, it is necessary to design a tightly connected and reliable spool assembl...

AI Technical Summary

Problems solved by technology

[0002] Various valve structures are used in mining hydraulic systems. In the prior art, in the valve core assembly composed of valve sleeve, ejector rod, valve core, etc., soft sealing structures such as sealing rings are usually used between the valve core and the valve sleeve. , when the ejector rod moves and makes the return chamber and the pressure chamber of the valve conduct, open the joint between the above-mentioned valve core and the valve sleeve and make the soft seal structure in an open state. Such a soft seal structure is easy to corrode after long-term use. When the spool and the valve sleeve cannot guarantee the tightness of the connection, especially in the mining environment, the reliability of the overall spool assembly will be reduced. For this, it is necessary to design a tightly connected and reliable spool assembly

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