CN1022380C

CN1022380C - Filter-type dustproof gas mask for self-breathing helmet

Info

Publication number: CN1022380C
Application number: CN89107447.3A
Authority: CN
Inventors: 张仲祥; 毕勇毅
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-09-21
Filing date: 1989-09-21
Publication date: 1993-10-13
Anticipated expiration: 2004-09-21
Also published as: CN1040508A

Abstract

The present invention relates to a self-absorption helmet filter type dustproof mask which is suitable for being worn and used in dusty operation, and a self-absorption helmet filter type anti-gas mask. This kind of mask is composed of a mouth and nose mask and a helmet with a filter device so as to reduce the shape and relieve the weight of the mask and expand the area of a filter layer so that the present invention has the characteristics of good dust and poison filter performance, low breathing resistance, long effective service life, easy wearing of people, and convenient use, and is suitable for operation staff in departments of mining, metallurgy, building, chemical industry, etc.

Description

Filter-type dustproof gas mask for self-breathing helmet

The present invention relates to a kind of self-priming skullcap filtering type anti-dust respirator that is suitable in the dust work, is particularly suited for wearing in the higher mining of dust concentration use, and the self-priming skullcap filtering type anti-poison respirator that is suitable for chemical industry department and the occasion use with chemical toxicant, belong to labour protection articles for use.

In dust work, need to wear dust mask, to avoid in inhaled air, containing excessive harmful dust.In this respect, use at present the self-suction dust filter mask that is more and relatively simple for structure, as shown in Figure 5, this anti-dust respirator is by oronasal mask, outlet valve, inlet valve, formations such as filter cartridge, because these devices are all concentrated and are contained on the oronasal mask, so whole mouth mask profile is big, weight is also heavier, not only the visual field there are some obstruction when wearing, and give wearer's face with heavy sense, in addition, owing to be subjected to the restriction of appearance and size, the filter course area of this mouth mask is less, thereby inspiratory resistance is than big and very fast with inspiratory resistance growth service time, when dust concentration is higher in the environment, above-mentioned this point is especially remarkable, for reducing inspiratory resistance, need often to change filtrate, this also usually makes troubles for the user.In United States Patent (USP) U.S.2216619, proposed a kind of filter in the oronasal mask to be shifted out, the respirator of peripheral hardware cap shape filter, this filter is paperwrapped in annular frame by filtrate and forms and link to each other with the oronasal mask inlet valve by flexible pipe, because this respirator has the larger area filter course, therefore have the little characteristics of the big inspiratory resistance of air inflow, and reduce and alleviated the profile and the weight of oronasal mask, but, because outside the filtrate of this filter is directly exposed to, therefore the condition of work of its filtrate is relatively poor, it is stained to be subject to accident, and because cap shape filter does not have other functions, this has also increased burden for user's head.

On the other hand, with regard to the self-absorbing filtering type anti-poison respirator, its structure is similar to above-mentioned anti-dust respirator, its filter poison is box-packed on oronasal mask, exist also that profile is big, Heavy Weight and awkward problem, though the malicious box of will filtering that has is removed and is become on one's body the little case back of the body hangs over, owing to increased a burden on one's body, also makes the people feel convenient inadequately when operation.

One of task of the present invention is to avoid above-mentioned deficiency and a kind of self-priming skullcap filtering type anti-dust respirator is provided, it can not only dwindle the profile of whole mouth mask, weight reduction, enlarge the filter course area, reduce inspiratory resistance, prolong the effective storage life of its low inspiratory resistance, and the working condition of filtrate is better, filter also has the effect of safe skullcap.

Second purpose of the present invention is to provide a kind of self-priming skullcap to filter anti-poison respirator, and first purpose of its architectural characteristic and the present invention is similar, promptly dwindles profile, and weight reduction enlarges the filter course area.

First purpose of the present invention is realized by following scheme: it has an oronasal mask 3, on oronasal mask 3, be provided with inlet valve 2 and outlet valve 16, inlet valve is connected with an end of flexible pipe 5, both sides also are provided with face frenulum 4 and neck frenulum 1, and difference is that the present invention also has a skullcap 7 that is provided with dust filtration device.Skullcap is provided with air admission hole 6 and venthole 15, and venthole 15 is connected with the other end of flexible pipe 5.

According to such scheme, when air-breathing, inlet valve 2 is opened, outlet valve 16 cuts out, and dusty gas feeds air admission hole 6 is purified air via dust filtration device, thereafter through venthole 15 and flexible pipe 5 inlet port nose cups 3, during expiration, then inlet valve 2 cuts out, and outlet valve 16 is opened, and the gas of exhalation is directly flowed out by outlet valve.Because the present invention moves to dust filtration device on the skullcap, obviously make the profile of mouth mask part and weight all be dwindled and alleviate, both alleviated facial additional force when wearing, also eliminated influence to the visual field, the wearer can be used and work more easily; When another important feature of the present invention is that dust filtration device moved to skullcap, because the skullcap surface area is bigger, thereby make filter course enlarge several times, the filter course of maximum comparable existing mask type increases 6-7 doubly, like this, the air-permeable layer that has increased dust filtration device first causes inspiratory resistance to descend, make wearer breathes more happy, and be convenient to the filtrate of selecting dust proof rate higher, make the present invention have higher dust proof rate, second also prolonged the effective storage life of its low inspiratory resistance greatly, particularly in the higher occasion of dust concentration, if use existing self-suction dust filter mask, within a short period of time, its inspiratory resistance increases very fast, gives the sensation of inspiratory dyspnea, and use the present invention, then the growth meeting of inspiratory resistance is very slow, so not only inspiratory resistance is low in the present invention, effective storage life is long, do not need often to change filtrate, and be more efficiently yet for the purification of air.In addition, because dust filtration device of the present invention is arranged between the shell and inner cover of skullcap, the influence and the accident that are not subject to external environmental condition are stained, therefore its dust filtration device can carry out work with relatively better and stable status, at ordinary times, under the situation of off working state, the filtrate of dust filtration device of the present invention also can obtain better preserve and protection, obviously, the skullcap that has a dust filtration device also has the effect as safe skullcap.Need to prove, all need the safe wearing skullcap usually, anti-dust respirator is tied mutually with skullcap, do not increase user's added burden in the occasion of dust work.

The scheme that realizes the present invention's second purpose is as follows: have an oronasal mask 3, on oronasal mask 3, be provided with inlet valve 2 and outlet valve 16, both sides also are provided with face frenulum 4 and neck frenulum 1, difference is that the present invention also has a skullcap 7 that is provided with the malicious device of filter, skullcap is provided with air admission hole 6 and venthole 15, and venthole 15 is connected with inlet valve 2 by flexible pipe 5.

Press such scheme, its working mechanism is similar to aforesaid anti-dust respirator with structure, different just its functions are to filter toxic gas, owing to can settle more more malicious filtrates that removes in the skullcap, filter malicious box and on mouth mask, removed, institute so that the present invention to have a canisters performance good, service time is long, wears characteristics easily.

Fig. 1 is the front view of the present invention when being anti-dust respirator, and small cusp is represented air-flow direction.

Fig. 2 is that the present invention is the side view of anti-dust respirator.

Fig. 3 is the partial cutaway figure of dustproof filter layer of the present invention.

Diagram when Fig. 4 wears for the present invention.

Fig. 5 is existing dustproof, the diagram when anti-poison respirator is worn, and 20 are the filter box.

Fig. 6 is the front view of the present invention when being anti-poison respirator.

Fig. 7 is the partial cutaway figure that the present invention filters the poison layer.

Fig. 8 is the side view of the present invention when being anti-poison respirator.

Fig. 9 is the side partial cutaway figure that the present invention filters the poison layer.

Embodiment when the present invention is anti-dust respirator such as Fig. 1,2, shown in 3, has an oronasal mask 3, oronasal mask is provided with inlet valve 2 and outlet valve 16, both sides are equipped with face frenulum 4 and neck frenulum 1 respectively, skullcap 7 can be made of plastics, both sides are provided with air admission hole 6, the front has mine lamp frame 8, internal layer at skullcap 7 is provided with dust filtration device, and dust filtration device is made of inner cover 17 and filter course 12, and wherein skullcap shell 10 forms with filter course 12 and filters exocoel 13, be full of unfiltered air, inner cover 17 forms with filter course 12 and filters inner chamber 14, is storage place that purifies air, and on the inner cover 17 strip-shaped bracket 11 can be set, be used for supporting filter course 12, filter course 12 can be made of filtrate 18 and copper gauze 19, filtrate 18 optional nylon ultrafine fibers, and inner chamber 14 communicates with rubber hose 5 via venthole 15, the other end of rubber hose 5 then is connected with inlet valve 2 on the oronasal mask, rubber hose 5 and inlet valve 2 are all each side pacified one, and symmetry is installed, and also is equipped with vibrationproof frenulum 9 in this external skullcap 7.

Embodiment when the present invention is anti-poison respirator such as Fig. 6,7,8, shown in 9, the structure of removing the malicious device of filter is inequality, all the structure with above-mentioned anti-dust respirator is identical for other, filter malicious device by inner cover 17 with remove malicious filtrate 21 and ring-shaped foam 22 constitutes, remove malicious filtrate 21 and can select active carbon for use, ring-shaped foam 22 plays rest and removes malicious filtrate and filter dust, below it, form annular cavity 23, annular cavity 23 is connected with flexible pipe 5 by venthole, air admission hole 6 can be located at the top of skullcap 7, in addition, 22 times dedusting filtrate 24 is set in ring-shaped foam, as Fig. 7, shown in 9, can make this mouth mask have gas defence dustproof dual-use function.

Claims

1, a kind of self-priming skullcap filtering type anti-dust respirator that is suitable for wearing in the dust work use, it has an oronasal mask 3, on oronasal mask 3, be provided with inlet valve 2 and outlet valve 16, inlet valve is connected with an end of flexible pipe 5, both sides also have face frenulum 4 and neck frenulum 1, it is characterized in that the present invention also has a skullcap 7 that is provided with dust filtration device, skullcap 7 is provided with air admission hole 6 and venthole 15, and venthole 15 is connected with the other end of flexible pipe 5.

2, by the described self-priming skullcap of claim 1 filtering type anti-dust respirator, it is characterized in that dust filtration device is made of inner cover 17 and filter course 12, inner cover 17 is provided with strip-shaped bracket 11, and filter course 12 is made of filtrate 18 and copper gauze 19.

3, a kind of self-priming skullcap filtering type anti-poison respirator that is suitable for wearing in the poisonous environment use, it has an oronasal mask 3, on oronasal mask 3, be provided with inlet valve 2 and outlet valve 16, both sides also have face frenulum 4 and neck frenulum 1, it is characterized in that the present invention also has a skullcap 7 that is provided with the malicious device of filter, skullcap 7 is provided with air admission hole 6 and venthole 15, and venthole 15 is connected with inlet valve 2 by flexible pipe 5.

4,, it is characterized in that filtering malicious device by inner cover 17 with remove malicious filtrate 21 and ring-shaped foam 22 constitutes by the described self-priming skullcap of claim 3 filtering type anti-poison respirator.

5, by the described self-priming skullcap of claim 4 filtering type anti-poison respirator, it is characterized in that 22 times dedusting filtrate 24 can being set in ring-shaped foam.