Three-way valve

Abstract

The invention belongs to the field of environment-friendly equipment and discloses a three-way valve. The three-way valve comprises a valve body and a valve switch control device, wherein the valve switch control device comprises silicon rubber sealing rings on the inner side of a valve port, a valve plate, a valve rod, a cylinder seat, a piston rod, a cylinder with two-way buffer and a sealed connecting part; the cylinder seat is fixed on a valve body on an opposite side of a valve port to be controlled; the cylinder on the cylinder seat is connected with one end of the valve rod through the piston rod in the cylinder seat; the valve rod is positioned at the other end in the valve body and is connected with one side of the valve plate which is positioned inside the valve body; and the sealed connecting part is positioned on a part of the valve rod which penetrates through the valve body. By the three-way valve, the switch control device has a playing card type structure; the valve plate is controlled to be contacted with the silicon rubber sealing rings, so that opening and closing of the valve are realized; and moreover, the valve plate is in linear motion, and the three-way valve is rapidly opened and closed and low in leakage rate and long in service life.

Description

technical field [0001] The invention belongs to the field of environmental protection equipment and relates to a three-way valve, in particular to a switch control device for the three-way valve and a three-way valve using the switch control device. Background technique [0002] In the waste gas treatment equipment production industry, three-way valves are installed between the regenerators of the regenerative thermal incinerator to switch the intake, outlet or back blowing of different regenerators. Most of the three-way valves are butterfly valves. The opening and closing of the butterfly valve is realized by the valve stem driving the valve plate to rotate, so the sealing performance is poor, it is difficult to meet the sealing requirements of the regenerative incinerator, and it is easy to cause harmful gas leakage and pollute the environment. At the same time, this valve opening and closing control method also has the disadvantages that it is inconvenient to replace th...

AI Technical Summary

Problems solved by technology

The opening and closing of the butterfly valve is realized by the valve stem driving the valve plate to rotate, so the sealing performance is poor, it is difficult to meet the sealing requirements of the regenerative incinerator, and it is easy to cause harmful gas leakage and pollute the environment

At the same time, this valve opening and closing control method also has the disadvantages that it is inconvenient to replace the sealing ring and the equipment is not easy to maintain.

Images