Large-dive-depth Kinston valve with small valve opening force

Abstract

The invention aims to provide a large-dive-depth Kinston valve with small valve opening force. The large-dive-depth Kinston valve comprises a hand wheel, a valve rod, a valve rod power block, a bearing box, a valve body, a valve head and a reinforcement rod mechanism, wherein the hand wheel is connected with the valve rod power block through a spline, the upper portion of the valve rod is sleeved with the valve rod power block, threads on the upper portion of the valve rod are matched with the valve rod power block, the bearing box is arranged outside the valve rod power block, an upper angle thrust bearing and a lower angle thrust bearing are arranged in the bearing box, the valve rod power block is provided with a protrusion, the upper angle thrust bearing is located above the protrusion, the lower angle thrust bearing is located below the protrusion, the bearing box is connected with the valve body, the lower portion of the valve rod is located in the valve body, a valve head cover is arranged in the valve head, the head of the valve rod is located in a cavity formed by the valve head cover and the valve head, and a moving space is formed between the head of the valve rod and the valve head when the head of the valve rod is attached to the valve head cover. According to the large-dive-depth Kinston valve, a two-level reinforcement mechanism is adopted, and the valve opening force is greatly reduced. The seal surface of an end mouth of the valve is protected, and reliability of the valve is enhanced.

Description

technical field [0001] The invention relates to a valve, specifically a sea valve. Background technique [0002] The opening force of the existing large submersible deep sea valve is very large. When the water pressure at the valve inlet is very high, it is very difficult to open the valve manually, and the electric drive requires a large output force of the driving equipment, so the driving equipment is increased. difficulty of selection. The general solution to the large valve opening force is to use the principle of balanced pressure to introduce the high-pressure water at the inlet of the valve to the outlet or the balance pressure chamber through the pilot hole to form a reverse pressure, so that the valve opening force is reduced. The valve has several disadvantages. First, the pilot hole is easy to block. Once the pilot hole is blocked, it is difficult to open the valve. When using electric or hydraulic drive equipment, the driving force of the selected drive equipme...

AI Technical Summary

Problems solved by technology

[0002] The opening force of the existing large submersible deep sea valve is very large. When the water pressure at the valve inlet is very high, it is very difficult to open the valve manually, and the electric drive requires a large output force of the driving equipment, so the driving equipment is increased. difficulty of selection

The general solution to the large valve opening force is to use the principle of balanced pressure to introduce the high-pressure water at the inlet of the valve to the outlet or the balance pressure chamber through the pilot hole to form a reverse pressure, so that the valve opening force is reduced. The valve has several disadvantages. First, the pilot hole is easy to block. Once the pilot hole is blocked, it is difficult to open the valve. When using electric or hydraulic drive equipment, the driving force of the selected drive equipment is selected according to the pilot structure. , the driving equipment cannot open the valve when the pilot hole is blocked, or even damage the driving equipment

If it is selected according to the non-pilot structure, it will undoubtedly increase the volume and power requirements of the drive equipment

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