An all-plastic diaphragm type one-way exhaust check valve with emergency ventilation function

Abstract

The invention relates to an all-plastic diaphragm-type one-way air-exhaust check valve with the emergency ventilation function. The all-plastic diaphragm-type one-way air-exhaust check valve comprisesa valve body, a first valve plate mounting cavity and an air purifying assembly mounting cavity are arranged in the valve body, an outer clamping buckling fastening piece is arranged on the side faceof the valve body, an air exhaust opening is formed in the outer clamping buckling fastening piece, a first valve plate is mounted in the first valve plate mounting cavity, a supporting piece is arranged at the lower portion of the first valve plate, a plurality of hollow parts and supporting reinforcing parts are arranged on the supporting piece, an air exhaust crack is formed in the first valveplate, the air exhaust crack divides the first valve plate into a plurality of air exhaust valve clacks, a dome part is arranged on the position, located at the upper portion of the first valve platemounting cavity, of the side face of the valve body, and a supporting piece damaging column is fixed on the inner wall of the dome part. Under the emergency state of losing the air source of the valve, the one-way non-return function of the first valve plate can be quickly transformed through hard pressing of the dome part of the valve body, meanwhile, a second valve plate sealing structure can be quickly destroyed manually, the two-way flow of the air flow is achieved accordingly, and the breathing need of a wearer under the emergency state is met.

Description

technical field [0001] The invention relates to the safety field of protective clothing, in particular to an all-plastic diaphragm type one-way exhaust check valve with emergency ventilation function. Background technique [0002] Airtight protective clothing is an important protective equipment to protect the safety and health of workers in dangerous environments, accident rescue personnel and the public in accidents. It is widely used in chemical, petroleum, nuclear industry, military industry, mining and other industries. It is used in industrial production and accident emergency important role in rescue. [0003] Airtight protective clothing works in a toxic and harmful environment, and it is necessary to provide clean breathing air for the wearer of the protective clothing. In order to prevent the interruption of the air source from threatening the life safety of the wearer of the protective clothing, the existing airtight protective clothing usually adopts two technica...

AI Technical Summary

Problems solved by technology

Some exhaust valves need to use metal materials such as springs and valve plates. When metal materials work in a corrosive environment, their strength will be reduced due to corrosion, and the sealing performance will be reduced, which will bring hidden dangers.

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