Multifunctional ball valve

Abstract

The invention belongs to the technical field of pipeline valves, and discloses a multifunctional ball valve. The multifunctional ball valve comprises a valve body, a valve ball, a handle and a valve seat; the valve body is provided with an A port, a B port, a C port and a D port and four control chambers respectively communicating with the A port, the B port, the C port and the D port; the valve ball is composed of a ball body and a connecting end; the ball body is provided with a through hole in the radial direction and is located at an intersection position of the four control chambers; theconnecting end is connected with the handle, and the over-flow area of the through hole is adjustable; the valve seat is arranged in the control chambers, and the valve seat can reciprocate to form aselective contact seal with the outer surface of the ball body; when the handle drives the valve ball to rotate, the valve seat remains in a position where the valve seat is out of contact with the valve ball; and when the handle drives the valve ball to connect the A port and the C port or connect the B port and the D port, the valve seat moves again and maintains in a position in contact seal with the valve ball. The multifunctional ball valve of the invention can reduce the wear between the valve ball and a sealing element, improve the service life and the sealing effect of the sealing element, and can realize a throttle control function.

Description

technical field [0001] The invention belongs to the technical field of pipeline valves, in particular to a multifunctional ball valve. Background technique [0002] In industrial or civil infrastructure, pipelines are usually used to transport media. Due to the change of pressure or temperature, the pipeline needs to be adjusted, and the adjustment mechanism is used in the pipeline to adjust the flow rate, so as to ensure the best working conditions and environmental safety. Among them, ball valves have been widely used in petroleum, chemical industry, power generation, papermaking, atomic energy, aviation, rocket and other industrial fields and daily life because of their advantages such as small fluid resistance, simple structure, compactness and reliability, convenient operation, rapid opening and closing, and wide application range. The pipeline medium is being transported. [0003] In the traditional ball valve, the opening and closing part of the ball valve is a ball...

AI Technical Summary

Problems solved by technology

In this way, the torque is large when opening and closing, and the ball will rub against the valve seat during the rotation process, which will cause serious wear and tear, which will easily cause leakage, reduce the working reliability of the ball valve, and shorten the service life of the ball valve;

[0006] (2) In the actual working process, the pipeline conveying medium will contain various impurities. During the switching process of the ball valve, because the ball and the valve seat are always in close contact, the sealing surface is easily scratched by harder impurities, resulting in seal failure and causing The ball valve leaks i

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