An integrated internal bypass high-pressure low-torque opening and closing ball valve and its installation method

Abstract

The invention relates to the technical field of mechanical valves, in particular to an integrated internal bypass high-pressure low-torque opening and closing ball valve and its installation method. A sealing ring and a disc spring are fixed at the connection of one end of the valve seat, a bracket is provided on the outer surface of the valve seat, a worm gear reducer is provided on the bracket, a stop valve cover is provided on one side of the valve body, and the valve cover and the valve body Vent holes are provided inside one side, and an internal bypass joint is provided at the joint between the vent hole inside the valve cover and the vent hole inside the valve body. The shut-off valve of the present invention enables the ball valve to be opened and closed after the pressure difference between the front and back of the valve reaches zero, improves the sealing performance and at the same time the valve stem does not need to overcome a huge torque, improves the service life of the valve, has high reliability, short downtime and reaches To meet the requirement of zero leakage, the vent hole forms two passages of low entry and high exit valves, the structure is compact, the structure is simple and safe without external branch pipes, and the sealing performance is high.

Description

technical field [0001] The invention relates to an opening and closing ball valve and an installation method thereof, in particular to an integrated internal bypass high pressure and low torque opening and closing ball valve and an installation method thereof, belonging to the technical field of mechanical valves. Background technique [0002] As the deepwater natural gas drilling platform is one of the most difficult and dangerous places to live, work and provide flow control system maintenance, a highly reliable valve is especially required, with the shortest downtime, maintenance costs kept to a minimum, and strict implementation of low leakage emissions International standards, to achieve zero leakage, low torque, high pressure difference; [0003] The existing valve material is made of ordinary metal, and the pressure it bears is relatively low, and there is no way to overcome the high pressure difference when opening and closing, and the torque of the valve stem is rel...

AI Technical Summary

Problems solved by technology

[0003] The existing valve material is made of ordinary metal, and the pressure it bears is relatively low, and there is no way to overcome the high pressure difference when opening and closing, and the torque of the valve stem is relatively small. The seat needs to overcome the extremely high friction force. The service life of the conventionally designed valve is extremely short. Generally, the valve stem is easy to break, and the seal of the ball and the valve seat is easy to scratch and cannot continue to seal, which will lead to leakage, which seriously reduces the use of the valve. Life expectancy, as well as increasing the cost of maintenance and replacement in the later period, will also cause immeasurable losses to life and work, and cannot meet the needs of life and production;

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