Double-layer sealing bypass valve with air-tight device

Abstract

The invention relates to a double-layer sealing bypass valve with an air-tight device. A valve body (3) is mounted on an air flue top plate (14) through a valve base (13), a filler sealing device (4) is mounted on the valve base (13) and an upper air flue partition plate (15), and a first valve plate (6), a compression elastic element (7) and a second valve plate (8) are mounted on a connecting rod (2); an air cylinder (1) is mounted on the valve body (3), the connecting rod (2) is connected with the air cylinder (1) and penetrates through the filler sealing device (4) under acting force of the air cylinder (1) to drive the first valve plate (6), the compression elastic element (7) and the second valve plate (8) to vertically move; and a hollow sealing ring (9), an inclined face sealing face (11) and a guiding device (12) are mounted on an air pipe (10) to form a double-layer sealing structure, an air-tight pipeline (5) communicates with the air pipe (10), and under the valve-closed state, compressed air enters the enclosed space formed by the air pipe (10), the first valve plate (6) and the second valve plate (8) through the air-tight pipeline (5) so as to form a positive-pressure chamber, and thus the air-tight effect is achieved. According to the double-layer sealing bypass valve with the air-tight device, zero leakage of an air flue bypass pipeline can be achieved, which is a prerequisite for dust removal equipment to achieve ultra-clean emission.

Description

technical field [0001] The invention relates to a double-layer sealed bypass valve device with an airtight device, which belongs to the technical field of air pollutant treatment and environmental protection. It is mainly used in the field of industrial waste gas treatment and ultra-clean emission, and can also be used in metallurgy, electric power, chemical industry, building materials, food processing and other fields. Background technique [0002] At present, there are many types of valves used for off-line maintenance of dust collectors, and there are many types of bypass valves. These devices have disadvantages, such as: poor sealing, unable to meet ultra-low emission requirements; complex structure, large space occupation, resulting in high investment and poor operation. The maintenance workload is heavy; the sealing surface is easy to accumulate dust and age, causing the valve to leak easily and the service life is short. Contents of the invention [0003] The obje...

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Problems solved by technology

[0002] At present, there are many types of valves used for off-line maintenance of dust collectors, and there are many types of bypass valves. These devices have disadvantages, such as: poor sealing, unable to meet ultra-low emission requirements; complex structure, large space occupation, resulting in high investment and poor operation. The maintenance workload is heavy; the sealing surface is easy to accumulate dust and age, causing the valve to leak easily and the service life is short.

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