High-voltage straight-flow stop valve

Abstract

The invention discloses a high-pressure straight-flow type stop valve, and belongs to the field of stop valves. According to the high-pressure straight-flow type stop valve, when the interior of a valve seat needs to be opened and closed, the interior of the valve seat can be opened and closed by rotating a valve rod to ascend or descend, and after the valve rod is rotated, a T-shaped sliding plate can be pressed to extrude a lubricating mechanism; the liquid storage bag makes contact with the fixing frame and deforms through pushing of the T-shaped sliding plate, then lubricating liquid in the liquid storage bag is guided out through the guiding-out opening and flows into the valve rod through the connecting opening to lubricate the valve rod, the lubricating mechanism is supplemented through the lubricating filling mechanism after being consumed, and therefore flowing water guiding is formed. The whole service time is prolonged, the rotating part of the valve rod is comprehensively lubricated when the valve rod rotates, and therefore the effect of effectively maintaining the valve rod is achieved, and meanwhile the valve rod is not prone to being eroded, so that large resistance is generated in rotation.

Description

technical field [0001] The present invention relates to the field of cut-off valves, and more particularly, to a high-voltage direct current cut-off valve. Background technique [0002] The globe valve, also known as the gate valve, is a forced-sealing valve. Therefore, when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to not leak. When the medium enters the valve from below the valve disc, the operating force needs to overcome the resistance. , is the friction force between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the diameter of the valve stem should be larger, otherwise the valve stem top bending failure will occur, press the connection There are three ways: flange connection, thread connection and welding connection. After the appearance of the self-sealing valve, the medium flow direction of the globe ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the shut-off valve is generally closed by manual rotation, and the long-term exposure to the air may cause corrosion of the rotating part, so that greater resistance may be generated when closing , and in the event of an emergency, the efficiency of closing or opening may be affected due to the high resistance to rotation

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