Throttling adjusting butterfly valve

Abstract

The utility model relates to a throttling adjusting butterfly valve, which belongs to the technical field of butterfly valves and comprises a valve body, a butterfly plate and a valve shaft, the butterfly plate is rotatably arranged in the valve body through the valve shaft, the valve shaft and the butterfly plate are arranged in an off-axis mode, the valve shaft and the valve body are arranged in an off-axis mode, a first sealing structure used for sealing is installed between the valve body and the butterfly plate, and a second sealing structure used for sealing is installed between the valve body and the butterfly plate. The first sealing structure comprises a sealing ring arranged in the valve body and a rubber protrusion arranged on one side of the sealing ring, and a second sealing structure used for sealing is installed in the butterfly plate. When the butterfly plate closes the valve body, efficient sealing is completed through the first sealing structure and the second sealing structure, when the impact force of the second sealing structure on water flow facing the butterfly plate is larger, the sealing effect of the second sealing structure is better, meanwhile, the force in the axis direction can be released to the two sides through the water blocking protrusions, and the sealing effect is better. The impact force on the butterfly plate in the axial direction is reduced, and the problem that the butterfly plate moves in the axial direction of the fluid channel, and consequently valve leakage is caused is solved.

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