Inflatable airtight isolation valve

Abstract

The invention discloses an inflatable airtight isolation valve which can be used for facilities with high airtightness requirements. The inflatable airtight isolation valve includes a valve body, a valve board, a switch actuator, a rotating shaft, an inflatable air bag, and a inflation system. The inflatable airtight isolation valve can detect the tightness of an airtight door after the valve is closed. An inflation sealing method uses the air bag for inflation sealing. The tightness of the isolation valve is judged by detecting the airtightness of the inflatable air bag under the closed condition of the isolation valve. The isolation valve has higher airtightness and faster switching speed, and is suitable for rooms or other facilities with high airtightness requirements.

Description

technical field [0001] This patent relates to the field of safety protection technology and equipment, and is an inflatable airtight isolation valve that can be used in facilities and equipment with high airtightness requirements. Background technique [0002] Airtight isolation valves are generally used in rooms with high airtightness requirements in high-level biosafety laboratories, nuclear power industries, ships and other facilities to solve the airtight isolation problem of the ventilation system of the above facilities. As a part of the ventilation pipeline, the airtight isolation valve's sealing performance largely determines the overall sealing of the laboratory room and the sealing of the ventilation pipeline. [0003] At present, the commonly used ventilation pipes are mostly rectangular pipes, and the rectangular air-tight isolation valve is more suitable for rectangular pipes than the conventional circular air-tight isolation valve, and the mechanical extrusion ...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used ventilation pipes are mostly rectangular pipes, and the rectangular air-tight isolation valve is more suitable for rectangular pipes than the conventional circular air-tight isolation valve, and the mechanical extrusion sealing method adopted by the circular air-tight isolation valve is difficult to apply Rectangular Airtight Isolation Valve

At the same time, some facilities have a large ventilation volume, and the size of the required airtight isolation valve is relatively large, while the circular mechanical seal isolation valve is limited by mechanical processing, and its passing size is difficult to meet the requirements

In addition, in order to meet the strength of the mechanical seal, the valve body of the circular airtight isolation valve is relatively heavy. In order to avoid damage to the isolation valve due to a large impact during the switching process, the switching speed is set at a low level, making it difficult to switch quickly.

[0004] At the same time, after the isolation valve is installed in the pipeline, it is difficult to carry out in-situ air tightness testing on site. At present, the air tightness of the isolation valve can only be evaluated indirectly by testing the overall tightness of the room enclosure structure or the ventilation pipeline.

If the isolation valve leaks during use, it will lead to a decrease in the sealing performance of the facility, and may even lead to serious accidents

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