Flexible double-rotation airtight butterfly valve device

Abstract

The invention relates to a flexible double-rotation airtight butterfly valve device. The flexible double-rotation airtight butterfly valve device comprises a valve body, a driving assembly for drivinga valve plate and the valve body to move relatively, and a sealing assembly arranged in the valve body and matched with the valve plate for acting, wherein the driving assembly comprises a valve shaft arranged in the circumferential direction of the valve body and penetrating through a connecting plate in the valve body; the two ends of the connecting plate are connected with the valve plate through a valve plate rotating shaft and a tension spring correspondingly; the rotation center of the valve plate deviates from the sealing face of the valve plate; the rotation center of the valve shaftdeviates from the axial center of the valve body; and the sealing assembly comprises a sealing base and a sealing strip arranged on the sealing base in a sleeving mode. The flexible double-rotation airtight butterfly valve device is novel in structure, lower in machining and manufacturing requirement, convenient to install and debug, small in operation torque, good in sealing performance and longin service life, and meets the actual application requirement.

Description

technical field [0001] The invention relates to the technical field of equipment manufacturing, in particular to a flexible double-rotation airtight butterfly valve device. Background technique [0002] With the continuous development of our country's economy, the equipment manufacturing industry plays an increasingly important role in the development of the national economy. As an important part of the equipment manufacturing industry, valves play a vital role in practical applications. In the fluid system, the valve is a device used to control the direction, pressure, and flow of the fluid, so that the medium (liquid, gas, powder) in the piping and equipment flows or stops, and can control its flow; In the system, it is used to change the passage section and medium flow direction, and has the functions of diversion, cut-off, throttling, check, diversion or overflow pressure relief. [0003] As a valve, the butterfly valve is a relatively common valve in China. It is a va...

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Problems solved by technology

[0004] However, due to the insufficient coaxiality of the two ends of the valve shaft during the processing of the existing butterfly valve, serious friction is likely to occur, so that the friction force and operating torque of the rotating shaft during the closing process are very large, which is easy to damage the butterfly valve actuator and close the valve. After that, the sealing strip has been in the compression state of the super-compression ratio, which leads to the problem of poor sealing performance and shortened service life of the butterfly valve.

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