Eccentric rotary valve

Abstract

The invention discloses an eccentric rotary valve, which comprises a main valve body, a sealing valve clack arranged at a feed inlet of the main valve body, a valve clack support lug and a spindle, wherein one end of the disc support lug is connected with the sealing valve clack by the locating pin of a valve clack connecting shaft; the other end of the valve clack support lug is connected with the main valve body by the spindle; and the spindle is provided with a positioning sleeve which is used for adjusting the axial position of the valve clack support lug and is provided with a flange gasket which is used for seal at the time of connection of a valve and a pipeline. In the eccentric rotary valve of the invention, the sealing valve clack is arranged at the feed port of the main valve body, the spindle is rotated by external force (thrust from a pneumatic actuating mechanism), and the spindle is used for driving the valve clack support lug to carry out rotary motion; the support lug rotates to drive a main valve clack to perform rotary motion; and when the main valve clack contacts with the sealing plane on the valve body completely, the valve is in fully closed state, namely seal state. The eccentric rotary valve of the invention has the advantages of good sealing effects, long service life and stable operation, and has zero friction and damage of the materials to a valve seat under the condition of compressive state, thereby preferably protecting a sealing valve seat.

Description

[0001] technical field [0002] The invention relates to a valve, in particular to an eccentric rotary valve. [0003] Background technique [0004] With the strengthening of social and environmental awareness, valves for preventing leakage are installed at the outlets of various sewer pipes, waste and exhaust gas. Currently, they are used in medium conditions with dust and particles in the pipeline. Conventional valves (such as : Butterfly valve, ball valve) use a soft-sealed valve seat, which is easily damaged and leaks, and its service life is short; while a hard-sealed valve seat is used, its sealing effect is poor and it is easy to leak. Therefore, the existing eccentric rotary valve needs to be further improved. [0005] Contents of the invention [0006] The purpose of the present invention is to solve the sealing problem of the working condition valve used for dust and granular media, and provide an eccentric rotary valve with good sealing effect, long service l...

AI Technical Summary

Problems solved by technology

[0004] With the strengthening of social and environmental awareness, valves for preventing leakage are installed at the outlets of various sewer pipes, waste and exhaust gas. Currently, they are used in medium conditions with dust and particles in the pipeline. Conventional valves (such as : Butterfly valves, ball valves) use soft-sealed valve seats, which are easily damaged and cause leakage, and their service life is short; while hard-sealed valve seats are used, their sealing effect is poor and they are easy to leak

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