Metal-sealed double-plate hydraulic-operated adjusting butterfly valve

Abstract

The invention discloses a metal-sealed double-plate hydraulic-operated adjusting butterfly valve. The metal-sealed double-plate hydraulic-operated adjusting butterfly valve comprises a valve body, thevalve body is in an annular shape, two valve stems symmetrically arranged are arranged at the position, on the two sides of the middle line of the valve body, of the cross section surface of the valve body, a butterfly board is arranged on each valve stem and in a D shape, a valve seat is arranged on the inner cylindrical wall of the valve body, the sides, facing the middle line of the cross section surface of the valve body, of the two butterfly boards are in contact sealing with each other when the valve stems rotate to control contact sealing of the butterfly boards and the valve seat, a hydraulic-operated actuator is arranged on the valve body, the valve stems are hinged to the valve body, a swing rod is arranged on the end, penetrating through the valve body, of each valve stem, andthe pushing rod of the hydraulic-operated actuator is hinged to the swing rods and used for pushing the swing rods to swing so as to control the valve stems to rotate. The metal-sealed double-plate hydraulic-operated adjusting butterfly valve has the advantages that the sealing performance is high, the pressure bearing capacity is high, effort-saving and quick switching is achieved, the opening flow can be adjusted conveniently, and the erosion is reduced.

Description

technical field [0001] The invention relates to the field of valves, in particular to a metal-sealed double-plate hydraulic regulating butterfly valve. Background technique [0002] Butterfly valve, also known as flap valve, is a regulating valve with simple structure, which can be used for switching control of low-pressure pipeline medium. of a valve. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. It mainly plays the role of cutting and blocking on the pipeline. The opening and closing part of the butterfly valve is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or adjustment. [0003] Butterfly valve is a kind of valve which uses disc type opening and closing parts to turn back and forth about 90° to open, close or adjust the flow of medium. Butterfly valve not only has simpl...

AI Technical Summary

Problems solved by technology

[0006] Disadvantages: 1. The operating pressure and temperature range is small, 2. The sealing is poor

[0007] Therefore, for large-diameter butterfly valves, if you want to meet high pressure, you must increase the thickness of the disc to make up for the lack of strength. The larger the size, the stronger the opening force will be, which will affect the production cost and service life of the butterfly valve

Images