High pressure valve opening and closing device and high pressure valve

Abstract

The invention belongs to the technical field of valves, and discloses a high pressure valve opening and closing device and a high pressure valve. The high pressure valve opening and closing device comprises a hand wheel, a hand wheel shaft fixedly connected with the hand wheel, a ball valve body, a cone valve body, a ball valve rod connected with the ball valve body, and a cone valve lead screw connected with the cone valve body; the end of the hand wheel shaft is connected with a driving gear, and the cone valve lead screw is sleeved with a driven gear, wherein the driven gear and the drivinggear are located at the same height; an inner hole of the driven gear is provided with a threaded structure matched with the cone valve lead screw, and the cone valve lead screw rise and fall in theup-down direction under driving of the driven gear; a groove wheel is mounted at the end of the ball valve rod, and a shifting disc structure is arranged at the middle section of the hand wheel shaftand comprises a shifting disc locking arc capable of being matched with the sunken peripheral edge of the groove wheel, and a cylindrical pin capable of being matched with a radial groove of the groove wheel; and the high pressure valve opening and closing device further comprises a mounting seat used for fixing the heights of the driving gear, the driven gear and the groove wheel. According to the high pressure valve opening and closing device, sequential opening and closing of the ball valve and the cone valve can be achieved, the cone valve is prevented from being eroded by high pressure airflow, and the sealing reliability of a high pressure valve is ensured.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a high-pressure valve opening and closing device and a high-pressure valve thereof. Background technique [0002] High pressure valves are mainly used in electric power, petroleum, chemical industry, metallurgy and other industries. At present, such valves produced by Chinese enterprises generally have shortcomings such as leakage, relatively short service life, and inflexible operation of valve opening and closing. [0003] The service environment of high-pressure valves is relatively complicated, and their working conditions are relatively harsh, and leakage is very easy to occur, especially internal leakage. Under the action of high temperature and high pressure, the valve will soon fail after internal leakage. In order to prevent this from happening, domestic and foreign valve manufacturers strive to strengthen the sealing device of the valve. For example, the movable composi...

AI Technical Summary

Problems solved by technology

However, this device uses a cam as a transmission mechanism, so it is very laborious to operate the valve opening and closing, and the cam is a high-pair contact, the unit stress is large, the cam is easily damaged, and the replacement is more frequent

In addition, the multi-layer compound rack structure can also realize the double sealing of the high-pressure valve, but the required structure is huge, which is not suitable for actual production

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