Pneumatic device for positive pressure oxygen respirator

A technology of pneumatic devices and respirators, applied in the direction of respiratory protection devices, respirators, life-saving equipment, etc., can solve the problems of inconvenient installation, complex structure, unstable output pressure, etc., and achieve convenient installation and disassembly, large flow rate, and sealing good performance

Inactive Publication Date: 2004-12-29
山西虹安科技股份有限公司
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Problems solved by technology

Its main disadvantage is that the output pressure of the conical spool and valve used by the pressure reducing valve is unstable, and its alarm can only alarm for residual gas. For the pressure of the high pressure chamber, there is no high pressure prompt alarm, and only the pressure indicator can be seen. The structure is more complicated and the installation is not very convenient

Method used

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  • Pneumatic device for positive pressure oxygen respirator
  • Pneumatic device for positive pressure oxygen respirator
  • Pneumatic device for positive pressure oxygen respirator

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Embodiment Construction

[0009] figure 1 with figure 2 , The positive pressure oxygen respirator pneumatic device consists of two parts: a decompression device and an alarm device. figure 1 , the decompression device is composed of adjusting nut 1, adjusting spring 3, differential pressure valve body 4, valve pad (spool) 6, valve body 7, compression nut 8, positioning column 9, filter screen 10 and sealing ring 2, etc. Wherein: the differential pressure valve stem is integrally formed by a push rod and a large piston 401; a groove 402 is formed on the end surface of the large piston on the contact surface of the large piston and the adjusting nut. The upper part of the valve body is a high-pressure gas inlet, one side is an outlet for low-pressure gas, and one side is an outlet for high-pressure pneumatic pipelines. The high-pressure gas chamber A, the low-gas chamber B and the high-pressure gas supply channel C, and the high-pressure chamber A communicate with the gas supply channel. The high-pre...

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Abstract

The pneumatic device includes one pressure-reducing unit and one alarm unit. The pressure reducing unit has high pressure air inlet cavity with filter and positioning column on its valve body; and low pressure air output cavity connected to high pressure air pipeline on its two sides; and inside the high pressure cavity, there are pressure difference valve rod, regulating spring and valve seat fixed in the lower part of the valve body. The alarm unit has main body, large and small cavity inside the main body, and these are piston inside the small cavity and balance piston and spring inside the large cavity, valve body in one end of the small cavity, regulating screw nut in one end of the large cavity and whistle beside the valve. The pneumatic device has automatic pressure regulation, small stroke, large flow rate, high operation pressure, over-pressure alarm and low-pressure alarm and is suitable for use in branches of concentrated and bottle oxygen supply.

Description

1. Technical field [0001] The invention relates to a pneumatic device of a positive pressure oxygen respirator. 2. Background technology [0002] At present, the pneumatic device used for protective respirators consists of a pressure reducing device, a safety valve, a pressure indicating device, etc., without an alarm device, and only the output of the pressure reducer to decompress the pressure. Chinese patent No. 88217234.4 discloses an integrated combined multifunctional pressure reducer for a respirator. Including a decompression device, a safety valve, a pressure indicating device and a residual gas alarm. The pressure reducer is divided into a high-pressure chamber and a medium-pressure chamber. The compressed gas output port is connected, and a medium pressure safety valve is installed on the other side. The high pressure chamber is respectively connected with the high pressure gas input port and the pressure indicating device port, and a residual gas alarm device is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61M16/00A61M16/20A62B9/00
Inventor 侯昱瑾李新华赵福泉李新年
Owner 山西虹安科技股份有限公司
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