Ball valve with long service life

Abstract

The invention discloses a ball valve with a long service life. The ball valve comprises a valve body, wherein a valve cavity is formed in the valve body, the left side of the valve body is provided with a left channel communicating with the valve cavity, the right side of the valve body is provided with a right channel communicating with the valve cavity, and the left channel and the right channel are coaxially arranged. A valve rod with the lower end extending into the valve cavity is rotationally connected to the position, at the upper end of the valve cavity, in the valve body, a protruding shaft coaxial with the valve rod is arranged at the bottom of the valve cavity, a valve ball is rotationally connected between the position, at the lower end of the valve rod, in the valve cavity and the protruding shaft, and a communicating hole is formed in the valve ball. A left inner sealing ring and a left outer sealing ring are slidably connected to the left side of the valve cavity in the left-right direction, and a right inner sealing ring and a right outer sealing ring are slidably connected to the right side of the valve cavity in the left-right direction. A left transmission assembly is arranged between the left inner sealing ring and the left outer sealing ring in the valve body, and a right transmission assembly is arranged between the right inner sealing ring and the right outer sealing ring. The ball valve is simple in structure and long in service life.

Description

technical field [0001] The invention relates to the field of pipeline valves, in particular to a long-life ball valve. Background technique [0002] The existing ball valve mainly includes a valve body, a valve seat, a valve core and an upper valve stem. The valve core is placed in the inner cavity of the valve body. Made of metal plastic material, it can form a seal with the outer surface of the valve core. The valve core is driven by the valve stem and rotates 90° around the ball valve axis. The valve core and the valve seat cooperate to open and close the fluid. The disadvantages are: There are ball valves to ensure that no internal leakage occurs, so the valve core must be pressed tightly on the valve seat during installation, so that the torque of the ball valve is large when opening and closing, the valve ball and seals are easy to wear, and the working life of the ball valve is very short. When the ball valve leaks, the maintenance and replacement of the valve seat a...

AI Technical Summary

Problems solved by technology

[0002] The existing ball valve mainly includes a valve body, a valve seat, a valve core and an upper valve stem. The valve core is placed in the inner cavity of the valve body. Made of metal plastic material, it can form a seal with the outer surface of the valve core. The valve core is driven by the valve stem and rotates 90° around the ball valve axis. The valve core and the valve seat cooperate to open and close the fluid. The disadvantages are: In order to ensure that no internal leakage occurs in the ball valve, the valve core must be pressed tightly on the valve seat during installation, so that the torque of the ball valve is relatively large when opening and closing, the valve ball and the seal are easy to wear, and the working life of the ball valve is very short. When the ball valve leaks, the maintenance and replacement of the valve seat and valve ball is complicated and time-consuming.

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