Tilted plate type shifting butterfly valve

Abstract

The invention offers a ramp type translation butterfly valve. It is made up of drive unit, bear frame, valve body, butterfly plate, seal ring, clamping plate, bearing, filler, gland, up valve shaft, down valve shaft, axle sleeve, filling piece, locating pin shaft, cap nut, end cover, and so on. Its feature is that the butterfly plate is equipped in the valve body with the angle of beta. Axle seat of the butterfly plate is U shape chase. One end of the up valve shaft and down valve shaft which are embedded into the axle seat is milled into plane with skewed slot. The butterfly plate is connected to the up valve shaft and the down valve shaft by the locating pin shaft with helical burr. The advantage of the invention is that the butterfly plate is rotated after the clearance translates when it's make and break; the action is portability; sealing surface is right cone; manufacture is convenient. It can realize the reliable seal; the unique outpost type axial direction fix position make the valve can be equipped at random angle; full mechanical type self locking pretension seal can realize the reliable two way seal.

Description

Technical field [0001] The invention relates to a slant plate type translational butterfly valve for cutting off a medium on a pipeline, which is a valve device. Background technique [0002] At present, all kinds of metal-sealed butterfly valves used in metallurgy, petrochemical, municipal and other fields, the butterfly plate only rotates around the valve shaft when opening and closing, the friction torque is large when the valve is opening and closing, and the sealing pair is an inclined cone, and the processing is intermittent Cutting, the sealing line is disconnected, and the sealing is not reliable. In addition, the Chinese Patent Gazette disclosed a low-torque butterfly valve with a patent application number of 00119105.5 on January 2, 2002. The valve seat is disengaged, and then rotates to realize the opening of the valve. However, due to the swing, the disengagement distance of the sealing surface is uneven. The board vibrates. Contents of the invention [0003...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the disadvantages of the existing metal-sealed butterfly valve, such as large opening and closing torque, discontinuous sealing line, unreliable sealing, uneven disengagement distance when the low-torque butterfly valve is opened, and vibration of the butterfly plate, the present invention provides a slant plate type translational butterfly valve, The sealing surface of the inclined plate translational butterfly valve is a positive cone, the sealing line is continuous, and the sealing is reliable; when it moves, it first translates and then rotates, and the opening and closing torque is small

Images