Rocker arm driven tapered piston type valve

Abstract

The invention relates to a rocker arm driven tapered piston type valve. The rocker arm driven tapered piston type valve comprises a valve flange and an opening and closing mechanism and is characterized in that the opening and closing mechanism consists of a bracket, a handle, a rocker arm, a tappet, an opening and closing piston, a connecting rod and a handle locking mechanism, wherein the bracket is integrated with the valve flange through fixing, the handle and the rocker arm are respectively hinged to the upper and lower parts of the bracket, the tappet is hinged between the middle part of the handle and the end part of the rocker arm, the opening and closing piston is hinged to the other end of the rocker arm, and the connecting rod is hinged between the opening and closing piston and the bracket; the opening and closing piston is provided with a cone-shaped head matched with a center spigot of the valve flange, a parallel four-bar linkage mechanism is formed by the opening and closing piston, the connecting rod, the bracket and the rocker arm, and the centerline of the center spigot of the valve flange is overlapped with the axis of the opening and closing piston. The rocker arm driven tapered piston type valve has the advantages that the service life is long, the production efficiency is increased, and the problems of the existing gate type valves or butterfly type valves that the seal is prone to failure, the opening and closing mechanism is prone to damage and the operation and control are timesaving and laborsaving are fundamentally solved.

Description

technical field [0001] The invention relates to an industrial valve, in particular to a tapered piston valve driven by a rocker arm, which is suitable for being installed at the end of a pipeline. Background technique [0002] At present, the sewage and other valves installed at the end of the pipeline mainly include gate valves and butterfly valves, but they all have the problems of high failure rate and short service life. The average service life is less than 3 months, and the replacement is frequent. Affect the production efficiency of various industrial and mining enterprises. The reasons are as follows: [0003] 1. The reason for the failure of gate valves: after the thread between the screw and the gate is worn, the gate is out of control; the gate and seat ring are severely worn or corroded, and the seal fails, causing leakage; foreign matter enters the gate chute, causing The gate is not closed tightly; [0004] 2. The cause of the butterfly valve failure: the ro...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a rocker-arm-driven conical piston valve with long service life and improved production efficiency, which fundamentally solves the problems of the existing gate valves or butterfly valves that the seal is prone to failure and the opening and closing mechanism is easy to fail. Loss, time-consuming and labor-intensive manipulation

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