Anti-leakage butterfly valve

Abstract

The invention relates to an anti-leakage butterfly valve. The butterfly valve comprises a pipe shell, wherein a channel allowing fluid to pass through is arranged in the pipe shell, and the two ends of the pipe shell are used for connecting an external pipeline; at least one sealing barrier is arranged in the channel of the pipe shell, each sealing barrier comprises two baffle plates which are arranged in parallel, and each two baffle plates are sequentially arranged in the advancing direction of the channel; a sealing plate is arranged between each two baffle plates, the projections of each two baffle plates in the channel direction are not overlapped and form an annular structure, and the projections of each two baffle plates in the direction perpendicular to the advancing direction of the channel are parallel; and the sealing plates are driven by a torsion bar, and the torsion bar can drive each sealing plate to rotate along the axis of the torsion bar, so that the two side surfacesof each sealing plate are respectively in contact with or separated from the corresponding two baffle plates. The anti-leakage butterfly valve can solve the problem that a gap between a torsion bar and a pipe shell is prone to air leaking due to the fact that the torsion bar is directly connected with sealing plates in an existing butterfly valve.

Description

technical field [0001] The invention belongs to the technical field of valve equipment, and in particular relates to an anti-leakage butterfly valve. Background technique [0002] The working principle of the butterfly valve is mainly to use the rotation of the partition to isolate the pipelines on the left and right sides, and the reverse rotation can realize the intercommunication of the pipelines on the left and right sides. Generally, the sealing performance of the butterfly valve is relatively strong, but with the wear and tear of use, the sealing performance gradually deteriorates. Reduced, requiring regular maintenance checks. [0003] The inventor believes that the existing butterfly valve has the following disadvantages and deficiencies: [0004] 1. The torsion rod used to drive the butterfly valve is directly connected to the sealing plate of the valve. When the sealing plate of the valve rotates, there will be a gap at the connection between the two, which is pro...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a leak-proof butterfly valve, which can solve the problem of easy air leakage in the gap between the torsion rod and the shell caused by the direct connection between the torsion rod and the sealing plate in the existing butterfly valve; solve the problem of the contact seal between the sealing plate and the inner wall of the shell. The problem of poor sealing caused by it solves the problem of poor sealing of a single sealing plate and the problem that the drive rod easily transfers a large amount of heat

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