Air supply valve with diaphragm substrate as positive pressure lever structure in novel medium pressure bypass structure

Abstract

The invention belongs to the technical field of a positive pressure type air breathing apparatus air supply valve, specifically discloses a positive pressure type air breathing apparatus air supply valve with a diaphragm substrate as a positive pressure lever structure in a novel medium pressure bypass structure, and solves the problem of an existing positive pressure type air breathing apparatusair supply valve with a diaphragm substrate as a positive pressure lever structure, that is, an existing medium pressure bypass structure and a medium pressure pipe are on the same side, a main body of the air supply valve is relatively small, and when the air supply valve and a full cover intermediate interface are connected, one side is too heavy, a certain imbalance is generated, and the operation is not convenient enough. In the invention, the medium pressure bypass structure is designed on the other side of the medium pressure pipe, namely, the medium pressure pipe is arranged on one sideof a main body of the air supply valve, and the medium pressure bypass structure is arranged on the other side of the main body, so that the air supply valve is more balanced in the overall layout, which is more advantageous for the connection with the full cover intermediate interface, and is beneficial to the trouble-free operation of the medium pressure bypass structure.

Description

technical field [0001] The invention relates to an air supply valve using a diaphragm substrate as a positive pressure lever in a novel medium pressure bypass structure, specifically relates to an air supply valve using a diaphragm substrate as a positive pressure lever, belonging to positive pressure fire-fighting air respirators, Self-contained open-circuit compressed air respirator, long-tube air respirator, medium-pressure pipe network-supplied air respirator, commander respirator, on-demand air-supplied escape respirator and other technical fields. Background technique [0002] The air supply valve realizes the function of automatically supplying air to the user according to the air volume required by the user for breathing. Among them, the air supply valve with the diaphragm substrate as the positive pressure lever structure has the characteristics of small size and light weight. However, the medium pressure bypass mechanism and the medium pressure pipe are located on ...

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Problems solved by technology

[0002] The air supply valve realizes the function of automatically supplying air to the user according to the air volume required by the user for breathing. Among them, the air supply valve with the diaphragm substrate as the positive pressure lever structure has the characteristics of small size and light weight. However, the medium pressure bypass mechanism and the medium pressure pipe are located on one side, which is suitable for use with the connection on the left side of the full-face mask. If it is used to connect with the middle interface of the full-face mask, it will appear that one side is too heavy and there is a certain imbalance. Moreover, the operation of the medium pressure bypass mechanism is not convenient enough.

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