Self-controlled and self-calibrating fail-safe two-way stop control valve

Abstract

The invention relates to the technical field of valves, in particular to a self-control and self-calibration anti-failure two-way cut-off control valve, comprising a valve body, two ends of the valve body are respectively provided with a high-pressure side flow channel and a low-pressure side flow channel, and the high-pressure side flow channel A valve port is formed between the flow channel of the low-pressure side and the valve port. There are valve seats on both sides of the valve port, and a drive box is arranged in the valve port; The drive of the first valve plug and the second valve plug can realize that when the first valve plug and the second valve plug are closed, the high-pressure side is closed first, and then the low-pressure side is closed. When opening, the low-pressure side is opened first, and then the high-pressure side is opened. It can reduce the opening and closing pressure of the valve plug, does not require a large holding pressure, and is suitable for pipelines with relatively high pressure, and the use of two valves can effectively prevent fluid from leaking from the valve, and the safety is improved.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a self-control and self-calibration anti-failure two-way cut-off control valve. Background technique [0002] Existing valves for high-pressure gas tanks often use a single plug and have a short service life. There are often impurities in high-pressure liquid storage tanks such as liquid chlorine tanks and liquefied petroleum gas, which can easily cause leakage of the valve body and cause major hidden dangers to social safety. [0003] Therefore, the invention with application number CN201210466469.5 relates to a two-way stop valve and its assembly method. The two-way stop valve includes: an inner cavity and an outer cavity divided by a middle partition, and the long screw passes through the valve cover and the middle partition in turn. The air guide tube; the long screw rod is threadedly matched with the valve cover, and the long screw rod is provided with an outer plug head opp...

AI Technical Summary

Problems solved by technology

[0004] However, its solution uses two nested screw rods to simultaneously control the closing of the two valve plugs. In addition, the invention with the application number CN202010064203.2 discloses a two-way stop valve. At the same time of closing, the valve port of the second communication pipe is also closed and sealed, so as to realize two-way cut-off, which is safe and reliable. The pressure is also easy to cause the loosening of the cooperation between the two screws or the loosening of the linkage mechanism, resulting in the inability to perform good synchronous cooperation in the later stage

Images