CN2675173Y - Filtering and oxygen compensating gas mask - Google Patents

Abstract

The utility model discloses a filtering and oxygen compensating gas mask. The utility model comprises a face mask 1, an air pipe 2 and a chemical filtering 3. The utility model also comprises an oxygen supply pipe 4, an oxygen bottle 5 and an oxygen flow regulating valve 6. One end of the oxygen supply pipe 4 is connected with the air pipe. The other end of the oxygen supply pipe 4 through the oxygen flow regulating valve 6 is connected with the oxygen bottle 5. The utility model has the advantages of having the dual functions of the chemical filtering and oxygen compensating. When the concentration of the chemical gas is lower in a fumigating warehouse, the chemical filtering of the gas mask is opened and the oxygen valve is closed. When the concentration of the chemical gas is higher in the fumigating warehouse and is over the effective protective concentration of the chemical filtering or the fumigating warehouse lacks of oxygen, the chemical filtering is closed and the oxygen valve is opened. When the concentration of the chemical gas is medium in the fumigating warehouse, the chemical filtering and the oxygen valve are opened at the same time. The user is not under the restriction of the environment conditions such as the content of the fumigating chemical gas and the oxygen. The user can choose to use both the chemical filtering and the oxygen valve at the same time or use one of the chemical filtering and the oxygen valve according to the fumigating environment of the warehouse.

Description

Filter the oxygen-complementing type breathing mask

Technical field: the utility model relates to the breathing mask field.

Technical background: breathing mask is that the prevention toxic gas enters the human body respiration organ, the main protection tool that the protection eyes are avoided stimulating.Main security protection articles for use breathing mask in the stifling work of grain system at present is generally filtering type.It is made up of face shield, ring grain wireway, 3 parts of canister.Filtermask with noxious material absorption or decomposition, thereby has purified the air that enters human body, because inexpensive, easy to carry mainly by special canister.But only limit to do not using under work situation of anoxic (being that the content of oxygen is not less than 18% in the surrounding air) and the low concentration poison gas environment.The effective protective time of canister be with the concentration of poison gas and time of contact length change, promptly Jie Chu concentration is big, just shorten effective time, the concentration of contact poison gas is little, then prolong effective time.30 liters of per minute ventilations, poison gas concentration is 1g/m ³Condition under, generally be that red flag I type is 14-28 hour the effective time of anti-hydrogen phosphide, red flag II type is 46 hours, red flag III type is invalid; 59 types are 30-34 hour, are 1.5g/m at phosphine concentration ³The time, be 40.5 hours its effective time, reaches 2g/m in the concentration of hydrogen phosphide ³, be 23 hours its effective time.And above canister only is applicable to that containing poison gas concentration in the air is below 2%, and oxygen concentration is not less than 18% condition.In recent years, along with building up of the large storehouse of large quantities of good leak tightness come into operation and recirculation fumigation and applying of fumigation technology intermittently, add the grain market orientation of purchase and sale, manage implementing in full of main body diversification, grain department will inevitably be purchased, store some high water content grains, and the high water content grain of new warehouse-in is because grain grain self is breathed and microbial activities is vigorous, grain will cause oxygen deficiency and anoxic in the fumigating bin behind long-time airtight fumigant insect killing, airtight stifling, the warehouse entry tonic or check during and open a position when loosing gas, the staff is careless slightly, and the death by suffocation accident will take place.In recent years, this type of bitter lesson has taken place in ground such as China Shandong.

Technology contents: the purpose of this utility model is exactly to provide a kind of filtration oxygen-complementing type breathing mask at the used above-mentioned deficiency of filtermask in the stifling work of grain system, and it has filter poison and oxygenating dual-use function.The utility model comprises face shield 1, wireway 2 and canister 3 compositions, but it also has oxygen supply pipe 4, oxygen cylinder 5 and amount of oxygen control valve 6, and oxygen supply pipe 4 one ends communicate with wireway 2, and the other end communicates with oxygen cylinder 5 by amount of oxygen control valve 6.Advantage of the present utility model is that it has filter poison and oxygenating dual-use function, when poison gas concentration in the fumigating bin is low, only open the canister of this breathing mask, close oxygen valve, in, the effective protective concentration of poison-superfiltering device higher or the storehouse during anoxic when poison gas concentration in the fumigating bin, close canister, only open oxygen valve.When poison gas concentration is moderate, can open canister and oxygen valve simultaneously.Whether the user is not subjected to the restriction of environmental conditions such as stifling poison gas and oxygen content, can unite two into one according to stifling environment concrete condition decision in the storehouse and use simultaneously or single using.

Description of drawings: accompanying drawing 1 is the utility model structural representation.

The specific embodiment:

Filtermask is the existing standard product, the JXX-D type oxygen cylinder that oxygen cylinder uses Beijing refreshing deer medicine equipment Co., Ltd to produce, oxygen cylinder volume 3.2L, maximum working pressure 14.7Mpa, oxygen storage capacity 480L, oxygen flow 0-5/min can regulate and control out the oxygen amount as required voluntarily.Other by specification and the connection of Figure of description connected mode get final product.

Claims (1)

1, filters the oxygen-complementing type breathing mask, comprise face shield (1), wireway (2) and canister (3) composition, it is characterized in that it also has oxygen supply pipe (4), oxygen cylinder (5) and amount of oxygen control valve (6), oxygen supply pipe (4) one ends communicate with wireway (2), and the other end communicates with oxygen cylinder (5) by amount of oxygen control valve (6).

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