Bidirectional sealing switching device and method and gas filter

Abstract

The invention discloses a bidirectional sealing switching device and method and a gas filter. The bidirectional sealing switching device comprises a barrel, a cover and a sealing ring, wherein the cover comprises a fixed cover and a bulge part arranged on one side of the fixed part; the sealing ring is arranged outside the bulge part in a sleeving manner; an inner hole of the barrel comprises a first hole section, a second hole section and a third hole section which are arranged in sequence and matched with the fixed cover, the sealing ring and the bulge part respectively; at least two first clamp teeth are arranged on the inner wall of the first hole section at intervals in the circumferential direction; second clamp teeth corresponding to the first clamp teeth are arranged on the outer edge of the fixed cover; when the second clamp teeth are located in clamp space, the upper side surface and the lower side surface of the sealing ring are propped against the inner walls of the fixed cover and the barrel respectively, and the outer side surface of the sealing ring is propped against the inner wall of the second hole section. According to the structure, with increase of pressure inthe barrel, self-locking effect and self-reinforced sealing effect can be realized, and leakage or misoperation is prevented.

Description

technical field [0001] The invention relates to the technical field of pressure vessel structures, in particular to a bidirectional sealing switch device, a method and a gas filter. Background technique [0002] Pressure vessels are widely used in industrial production processes. Taking the gas filter as an example, it is a kind of pressure vessel, which is used for gas supply at high pressure (0.4Mpa<P<4.0Mpa), medium pressure (0.01Mpa≤P≤0.4Mpa), and low pressure (P<0.01Mpa). It is widely used in the system to purify gas, protect pipelines and equipment, improve combustion quality, and improve energy efficiency. It is an indispensable filter equipment in the production of gas transmission and distribution. [0003] At present, the traditional pressure vessel seals are mostly connected to the cylinder body by bolt fastening, which has defects such as difficult disassembly, long maintenance operation time, and heavy equipment, which brings a lot of inconvenience to...

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Problems solved by technology

[0003] At present, the traditional pressure vessel seals are mostly connected to the cylinder body by bolt fastening, which has defects such as difficult disassembly, long maintenance and operation time, and heavy equipment, which brings a lot of inconvenience to production and maintenance.

At the same time, it is necessary to process the water lines on the sealing flange, which leads to complex processing technology, difficulty in controlling the processing accuracy, and easy to wear and tear during production and operation, and there is a certain hidden danger of leakage

[0004] In terms of sealing principle, the traditional flange plate bolt fastening pressure vessel relies on the bolt connection to compress the lip-shaped sealing gasket for sealing. However, when there is a misoperation of opening under pressure during production and operation, safety accidents are prone to occur, resulting in human and financial losses.

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