Inward depressurizing high pressure soft sealing ball valve

Abstract

The invention relates to a valve, and particularly relates to an inward depressurizing high pressure soft sealing ball valve. The inward depressurizing high pressure soft sealing ball valve comprises a valve body, a valve cover, a valve rod, a ball body, a valve seat, a swing positioning connecting rod, a platen handle, an operating handle, a locking mechanism C, an inclined wedging mechanism E and a decompression runner L, wherein the swing positioning connecting rod is connected with the platen handle; the swing positioning connecting rod is driven by the platen handle to carry out the swing motion; a slider is driven by the inclined wedging mechanism E of a sinker rod to push a steel ball and a spring to open a check valve; the valve body is internally provided with a pressure release system; the pressure release system pushes the slider F and the steel ball G by the inclined wedging mechanism of the external sinker rod E so that a bypass pipe L can be communicated with a bypass pipe B; and the built-in pressure release system can realize the connection of the automatic operation of manual operation, power drive, pneumatic drive or hydraulic drive through an external connecting device.

Description

technical field [0001] The invention relates to a new type of valve, in particular to a high-pressure soft-sealed ball valve with internal pressure relief. Background technique [0002] The ball of the traditional high-pressure soft-sealed ball valve is supported by the valve seats at both ends. When the valve is in a normal state, the ball groove is placed in the center of the rotating body, which coincides with the axis of the valve stem; when the valve is under pressure, due to the pressure of the pipeline and the seat Due to factors such as material elastic deformation, the axis of the ball will deviate from the axis of the valve stem, which will affect the opening and closing torque of the valve. Usually, after the pressure reaches 3000 psa or more, the valve cannot be started due to the above reasons, and the transmission of the ball and the valve stem will fall off or be damaged. Phenomenon. [0003] Ball valves are classified according to their structural principles...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a high-pressure soft-sealed ball valve with internal pressure relief, which solves the practical problem that when the soft-sealed floating ball valve is applied to high-pressure working conditions, the valve seat is compressed during the opening and closing process of the ball valve, and the ball deviates from the axis, causing the actual problem that the opening and closing torque is too large

Images