Butterfly valve with bi-directional sealing device

Abstract

The invention relates to a butterfly valve with a bi-directional sealing device. The butterfly valve comprises a valve body (1), a pressing ring (2) and a butterfly plate (6). The pressing ring (2) is fixed in a backer of the valve body (1) through a bolt, and the butterfly plate (6) is located in a channel of the valve body (1). The butterfly valve is characterized in that a gap is formed in the connection portion of the valve body (1), the pressing ring (2) and the butterfly plate (6). The butterfly valve further comprises a sealing pair in the gap. Compared with the prior art, the butterfly valve is novel, ingenious and unique in design, good in sealing effect, firm in structure and widely suitable for various special work conditions such as high pressure resistance and corrosion resistance, and sealing constitution is smooth.

Description

Technical field [0001] The invention relates to a valve sealing device, in particular to a butterfly valve with a two-way sealing device. Background technique [0002] At present, there are many problems in domestic butterfly valves, which have not been fundamentally solved. For example, the butterfly valve has poor sealing performance, low reliability, short service life, internal leakage and overflow, unclear closure, easy opening and closing, no corrosion resistance, high pressure resistance, frequent maintenance, etc., which often cause large-scale water cuts, which brings society There are many negative effects, and one of the key problems is the reasonable design of the butterfly valve sealing sub-mechanism. The sealing mechanism of the traditional butterfly valve often uses screws and pressure plates to fix the deformation of the old structure of the sealing pair, which tends to be eliminated. This kind of structure design is unscientific, unreasonable, and the two-way se...

AI Technical Summary

Problems solved by technology

For example, butterfly valves have poor sealing performance, low reliability, short service life, internal leakage and external overflow, unclear closing, easy jamming of opening and closing, no corrosion resistance, no high pressure resistance, frequent maintenance, etc. often cause large-scale water cutoffs, bringing social harm. There are many negative effects, and one of the key problems is the reasonable design of the butterfly valve sealing mechanism

The sealing pair mechanism of the traditional butterfly valve often uses screws and pressure plates to fix the deformation of the old structure of the sealing pair, which tends to be eliminated. This structural design is unscientific, unreasonable, and the two-way seal is unreliable. Some fixed sealing pairs are stressed on the sealing surface Unbalanced, some places are pressed too tightly, some places are pressed too loose

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