CN2060677U - Fire-fighting combined respirator - Google Patents

Abstract

The utility model relates to a fire-fighting combined respirator, which is mainly characterized in that the utility model is composed of a facemask and two sets of air supply devices, namely a filtering type and an isolating type air supply devices. The mouth of a high-pressure steel cylinder is provided with an air cylinder valve which is communicated with a lung motivating valve via a pressure reducing valve; the lung motivating valve and a canister are communicated with the facemask through an automatic switching valve. The respirator has two sets of air supply devices, namely a filtering type and an isolating type air supply devices which are available for switching mutually. Air is supplied by the canister in toxic areas, while air is supplied by an air cylinder in anoxic areas, and carried air can be used at necessary time. Working time is prolonged to more than two times. The facemask of the utility model designed according to the Chinese head and fire-fighting operational requirements has the advantages of high safety and good positive pressure air tightness and negative pressure air tightness, and the utility model is applied in various occasions which require facemasks.

Description

Fire-fighting combined respirator

The utility model is a kind of personal breathing road protective equipment, especially for fire-fighting unit, industrial and mining enterprises, high level or hypogee.In rescue and relief work, wear use as fire-fighting, rescue personnels such as subway, tunnel, fortification, warehouse, airport, hotel, large ship, harbours.It has the function of filtering type and isolation type two class masks.Various toxic gases, aerosol be can prevent, also can operation and rescue work be carried out in anoxic (oxygen concentration is below 18% in the air) area.Can prolong the working time more than one times.

As everyone knows, breathing mask is divided into filtering type and isolation type two big classes, differs from one another, and can not replace mutually using.The fire fighter does not generally use filtering face, because what often run in the disaster relief is high concentration toxic smoke, carbon monoxide or anaerobic environment, must use the isolation type mask, previously used major part is an oxygen isolation type mask, and its complex structure, operation technique require height, are difficult to maintenance.After change the suction type air mask into.Its face shield safety coefficient is not high.The U.S. formally announces the inaccurate negative pressure air respirator of producing after 1987.These several years some NFA mechanisms of west progressively are adapted as the positive-pressure type air respiratorresuscitator.

This face has the following advantages:

(1) air-tightness is good, safe and reliable, (people who wears mask is if any a lot of beards, or the face type is special even leak gas, or the gas leakage that causes because of external force collision face shield etc.) also be that mask internal positive pressure air outwards becomes flat, extraneous contamination air can not infiltrate mask poisons personnel.(2) wear use easy to maintenance.(3) the use funds are cheap etc.

Shortcoming is self-contained little air, used more than 40 minute at most, comprise and taking orders, observe the condition of a disaster, enter the disaster area, rescue and withdraw from the required time of disaster area, especially to keep the time of withdrawing from the disaster area, (about ten minutes) otherwise self-contained air use up, can force the fire fighter to take off mask immediately and poison, this is the thing that the fire-fighting command personnel worry most, more than required air of non-activity duration of this class, account for 1/3 to 2/3 of own entrained air, it is just few to leave used gas of activity duration like this for.Solve the existing shortcoming of this positive pressure respirator,, reduce fire-fighting command person using the misgivings of positive pressure respirator in order to increase the sense of security that the fire-fighting soldier wears mask.The special the utility model that proposes.

The purpose of this utility model provides a kind of automatic conversion valve, filtering face and isolation type mask are connected as a single entity, make it possess the function of two kinds of masks, the air steel cylinder adopts the D6AC steel grade alleviating the weight of mask, and gas storage pressure is doubled (30MPa).

The purpose of this utility model is to realize like this, two types mask feeders are merged, with automatic conversion valve they are associated in together, breathe for personnel to the face shield air feed, so just make this respirator have the performance of two class masks via a breather pipe.

The situation that the fire-fighting fight is met is extremely complicated, nervous, the fire-fighting soldier will prepare to wear a mask in arriving the way, disaster area, has worn mask before getting off, and takes orders, understand the condition of a disaster, hurry to the scene of a fire,, hurry to ignition point more to need the long time as at skyscraper or subway, toxic smoke, malicious mist are usually also arranged during this period of time.This moment, available filtering type feeder when arriving the scene of a fire, was found to have under the condition that filtering faces such as dense smoke, malicious mist or anoxic can not use, and can open gas cylinder valve immediately, use the isolation type air feed, can feel that respiratory resistance obviously reduces at this moment, breathed happy.The soldier is begun with air to open from fire-fighting, can there be 40 fens clock times to be used for operation, after siren is reported to the police, inform that also having more than 10 minute uses the gas time, do not have end as operation, or, needn't require changing shifts at once (at this moment the positive-pressure type air respiratorresuscitator must change shifts at once) even after the air that carries uses up near completing combat mission, respirator itself can transfer filtering type system air feed automatically to, need not misgivings can force the people to take off respirator and poisons.Also can adhere to operation as needs, at this moment as see through a little poison gas or carbon monoxide gas or inhale a little oxygen-depleted gas, finish the work leave the fire district after, rest a period of time can recover normally can not cause actual bodily harm.Increase the sense of security of wearing mask so greatly, improved the efficient of rescue work of extinguishing fire greatly.The entrained air of respirator really is used in the moment that needs most.It is than having prolonged more than one times the service time of positive pressure respirator.

The structure of utility model is provided by following examples and accompanying drawing:

Fig. 1 is a structure chart of the present utility model.

Fig. 2 (1), Fig. 2 (2) are automatic conversion valve of the present utility model.

Fig. 3 is face shield figure of the present utility model.

Fig. 4 is face shield of the present utility model and standard number of people mutual alignment.

Fig. 5 is eye window of the present utility model and standard number of people mutual alignment.

Fig. 6 is outlet valve box of the present utility model and standard number of people mutual alignment.

Fig. 7 is head-shield figure of the present utility model.

Fig. 8 is head-shield of the present utility model and standard number of people mutual alignment.

Fig. 9 is headband of the present utility model and clasp.

Figure 10 is a headband of the present utility model, clasp and standard number of people mutual alignment.

Figure 11 (left side) is cover body left profile figure of the present utility model.

Figure 11 (right side) is the right profile of cover body of the present utility model.

Figure 12 is cover body of the present utility model and standard number of people mutual alignment.

As shown in Figure 1, respirator is made up of face shield (9) and feeder.Feeder has two kinds of filtering type and isolation types, and the isolation type feeder comprises: high-pressure cylinder (0); Bottle valve (1); Alarm (2); Pressure gauge (3); Pressure reducer (4); Lung moves valve (5); Automatic conversion valve (6), the filtering type feeder comprises: canister (7); Check valve (8).

High-pressure cylinder (0) is the container of splendid attire high-pressure cylinder, is made up of high strength steel (D6AC steel grade).

It is loaded on the oral area of steel cylinder (0) bottle valve (1), is positioned between steel cylinder (0) and the pressure-reducing valve (4), and be the switch of high-pressure cylinder, the gas cylinder safely valve is housed on the bottle valve.

It is contained in alarm (2) on the pressure-reducing valve (4), be positioned between bottle valve (1) and the pressure-reducing valve (4), when storage pressure reduce to the gas cylinder maximum inflation pressure 1/5 the time, begin to send alarm signal, inform that people leave the still surplus time of contaminated area.

It is contained in Pressure gauge (3) on the pressure loading valve (4), is positioned between gas cylinder valve (1) and the pressure-reducing valve (4), and Pressure gauge (3) links with high-voltage tube and pressure-reducing valve (4), is used for measuring gas pressure in the bottle.

It is positioned at pressure-reducing valve (4) between gas cylinder valve (1) and the moving valve (5) of lung, and it is reduced as middle pressure (6-8MPa) with the gases at high pressure in the gas cylinder (30MPa).

Lung moves valve (5), and it is positioned between pressure-reducing valve (4) and face shield (9) and the automatic conversion valve (6), and it is the air-breathing valving of regulating gas supply flow that relies on the human lung.It is air-breathing for personnel that nip 6-8MPa gas transfers to 600Pa in being about to.

Automatically conversion valve (6) as shown in Figure 2.It is positioned between moving valve (5) of lung and the face shield (9), and it is one airtight good, the check valve that resistance is little.It and face shield (9), lung moves valve (5), and canister (7) is interconnected, and (when personnel breathe, form malleation in the mask, the waste gas of exhalation is discharged by communication outlet valve box (708).(as the steel cylinder air feed) made and causes malleation in the mask because positive-pressure type lung movable valve (6) acts on when personnel were air-breathing.When the moving valve pocket pressure of lung is malleation, switching valve stuffiness automatically, when the moving valve pocket of lung is negative pressure (this moment gas cylinder not air feed), switching valve is opened automatically, and the contamination air purifies through canister (7), and it is air-breathing for the people to lead to face shield through switching valve automatically.

Canister (7) wherein is equipped with filter paper, filters poisonous aerosol; Active carbon slab is housed, filters toxic gas; Hopcalite agent is housed makes carbon monoxide transfer nontoxic carbon dioxide to, before jar, after be equipped with airtight good, the check valve that resistance is little.

With regard to the utility model, adopt common face shield to be connected with automatic conversion valve, can realize goal of the invention, below be that embodiment partly is described further face shield with the positive-pressure type face shield.

Face shield (9) (Fig. 3) it by cover body 711, eye window 705, eye window card 704, communication 708, head-shield 701, headband 712 carries 714, adjustable ring 713, air admission hole 715 compositions such as grade.The mutual alignment of it and standard head model 700 is shown in (Fig. 4).

Eye window 705 personnel wear mask by an eye window 705, externally observe, and it is made with transparent material, it with the mutual alignment of standard head model shown in (Fig. 5), can keep the visual field greatly, and not influence and wear steel helmet.

Communication outlet valve box 708, its applied film vibration principle are propagated sound (also available transmitter is propagated sound), and have the moving valve of outlet valve (high-drag) and lung to be complementary to guarantee to form in the mask malleation.In order to guarantee that acoustic is good, the mutual alignment of it and standard head model 700 is shown in (Fig. 6).

Head-shield 701(Fig. 7) it is fixed in the head-shield hole, face shield top 702 by the trapezoidal net that the rope braiding forms, and is subjected to the pulling force of headband 712 to make driving fit frame 703 be fit to head, to the tension uniform of face shield (7).Also even to head pressure.It and standard head model 700 mutual alignments are shown in (Fig. 8).It is unaffected to wear steel helmet.

Headband (Fig. 9) 712 is made by the elastic fabric elastic cord, and it passes two band 713.Wear mask as long as both sides headband 712 is tightened up, can make face shield (7) evenly and cosily be fit to head 700 by the component of all directions of head-shield 701, headband prolongs surplus part as carrying 714, and it and standard head model 700 mutual alignments are as (Figure 10).

Cover body 711(Figure 11) divides driving fit frame 703; Flow deflector 706; Eye window 707; Communication mouth 709; Air inlet 715; Headband hole 710; Positions such as head-shield hole 702, it is formed by the natural rubber compacting.

Driving fit frame 703 is by the young women's head-ornaments type of Chinese male 700 size design, be shaped as annular Turn up hem, this structure, shape, size, rubber materialization domestic animal can, guarantee the sealing of mask barotropic gas, it is fit to people's face, guarantees that air leakage factor meets the GB requirement, and this model can guarantee that young male is airtight good more than 95%.

Flow deflector 706 above nose, can stop the exhalation aqueous vapor not contact with eye window 705 knots, makes antidimmer functional.

Each oral pore of cover body is used to install each parts of face shield, makes each parts and the number of people keep best relative position.Cover body (9) and head dummy 700 relative sizes make each parts of face shield keep best function as (Figure 12).

The standby filtering type of this breathing apparatus and isolation type two cover feeders can be changed use mutually, use the canister air feed in poisonous area, use the gas cylinder air feed in the anoxic area, and entrained air is used in the necessary moment, can prolong the working time more than one times. This respirator mask is by Chinese's women's head-ornaments type and fire-fighting tactics requirement design, and the positive/negative-pressure air-tightness is good, and is safe and reliable, is suitable for the scope of various use masks.

Claims (5)

1, a kind of compound fire-fighting respirator is characterized in that it is made up of face shield (9) and feeder, and feeder comprises filtering type feeder and isolation type feeder, the isolation type feeder comprises: high-pressure cylinder (0), bottle valve (1), alarm (2), Pressure gauge (3), pressure reducer (4), lung moves valve (5), automatic conversion valve (6), and the filtering type feeder comprises: canister (7), check valve (8), face shield adopts common face shield.

2, as claim 1, described device is characterized in that at the oral area of high-pressure cylinder (0) bottle valve (1) being installed, and bottle valve (1) is communicated with by the moving valve (5) of pressure-reducing valve (4) and lung; Lung moves valve (5), canister (7), and face shield (9) is interconnected by automatic conversion valve (6).

3, as device as described in the claim 2, it is characterized in that also being equipped with on the pressure-reducing valve (4) alarm (2) and Pressure gauge (3).

4, as claim 1,2 described devices is characterized in that high-pressure cylinder (10) adopts high strength steel D6AC steel grade.

5, install according to claim 1, it is characterized in that face shield (9), adopt the positive-pressure type face shield.

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