CN201710838U - Isolated positive pressure oxygen breathing apparatus - Google Patents

Abstract

The utility model discloses an isolated positive pressure oxygen breathing apparatus which comprises a shell, a gland, a positive pressure adjusting cap, a positive pressure adjusting spring, a large replenishment membrane, a replenishment spring, a nozzle, a small membrane, a replenishment valve body, a valve screw and a quantitative valve rod, and is characterized in that the quantitative valve rod is arranged and fixed in the middle of the small membrane in stringing; the external diameter of the small membrane is phi24mm, the middle thereof is sunk by 1mm, the thickness of the edge thereof is 1mm, and the diameter of the middle hole is phi1.5mm; and the diameter of the quantitative hole of the quantitative valve rod is phi0.13-0.16mm. The breathing apparatus has the advantages of leading the small membrane to generate elastic deformation through adjusting the work load of the positive pressure adjusting spring to control the pressure conversion between two chambers, so as to realize increasing and reducing of the positive pressure value of a low pressure system, and opening or closing of the automatic replenishment valve, thus achieving in-time replenishment tracking, and improving the sensitivity and accuracy of the valve switch.

Description

The isolation type positive pressure oxygen respirator

Technical field

The utility model belongs to a kind of mine rescue breathing equipment, particularly a kind of isolation type positive pressure oxygen respirator.

Background technology

At present at home in the coal industry, accident such as particularly take place that repeatedly gas is given prominence to, caught fire under the coal mine, cause anoxic, pernicious gas to spill and jeopardize miner and staff's life, each innings ore deposit all has specially part-time rescue team member wear the rescue of going into the well of isolation type oxygen breathing apparatus for this reason.The old type oxygen breathing apparatus in past belongs to negative-pressure type, and the user always follows the positive and negative pressure alternating state at respiratory, infiltrates easily in case seal bad extraneous pernicious gas.And the positive pressure oxygen respirator that uses has now just overcome this shortcoming, breathes and always carries out at the barotropic state that is higher than external atmospheric pressure, and unique advantages is arranged by contrast.Oxygen breathing apparatus particularly positive pressure oxygen respirator is the security high product of the current use of China owing to be positive pressure type, the team member in use, extraneous pernicious gas can't enter respirator interior.Because mine gas is to be in atmospheric pressure state, and the low-pressure system air feed of respirator is higher than environment atmospheric pressure all the time, has so just promoted security reliability.

But the version that realizes the barotropic state oxygen supply in respirator is varied, as the oxygen supply of plunger type valve, lever valve oxygen supply etc., the unlatching resistance of valve causes breathing pressure reduction big greatly during owing to oxygen supply, gas supply flow and human needs are flux matched unbalanced, and the phenomenon of waste oxygen is more serious.

The utility model content

The purpose of this utility model provides a kind of isolation type positive pressure oxygen respirator, make the conversion of Small diaphragm-piece generation strain control dual cavity pressure by the operating load of regulating the malleation regulating spring, to realize that low-pressure system malleation value becomes big, diminishes, open or close the automatic replenishing valve door, reach supply and follow the tracks of in time, improve the sensitivity and the degree of accuracy of valve switch.

The purpose of this utility model is achieved by the following technical solution: it comprises housing, gland, malleation adjusting cap, malleation regulating spring, the big diaphragm of supply, supply spring, nozzle, Small diaphragm-piece, supply valve body, valve screw, quantitative valve rod, malleation regulating spring and supply spring, it is characterized in that: the fixing quantitative valve rod of Small diaphragm-piece inter-burst dress; The external diameter of Small diaphragm-piece is Φ 24mm, middle recessed 1mm, and the thick 1mm in edge, interstitial hole diameter are Φ 1.5mm, quantitatively the dosing hole diameter of valve rod is Φ 0.13-0.16mm.

The utility model has the advantages that: make the conversion of Small diaphragm-piece generation strain control double chamber pressure by the operating load of regulating the malleation regulating spring, to realize that low-pressure system malleation value becomes big, diminishes, open or close the automatic replenishing valve door, reach supply and follow the tracks of in time, improve the sensitivity and the degree of accuracy of valve switch.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the C portion enlarged diagram of Fig. 1.

The specific embodiment

See Fig. 1,2, concrete structure is as follows: assembling supply valve body 4 on the valve opening of distributor body 3, supply valve body 4 pressured tight bolts 5 are pressed on the valve opening.On supply valve body 4, install quantitative valve rod 2, quantitatively assembling valve screw 1 on the valve rod 2 by 6 effects of valve rod spring; Quantitatively valve rod 2 is leaning against on the supply valve body 4 under the effect of valve rod spring 6 tightly, and the degree that is close to is regulated with spring pressing nut; Assembling nozzle 8 in Small diaphragm-piece 7 tops is fixed on the distributor body 3 by nozzle pressure ring 14; The fixing quantitative valve rod 2 of Small diaphragm-piece 7 inter-burst dress; The external diameter of Small diaphragm-piece 7 is Φ 24mm, middle recessed 1mm, and the thick 1mm in edge, interstitial hole E diameter is Φ 1.5mm, quantitatively the dosing hole D diameter of valve rod is Φ 0.13-0.16mm.Supply big spring 11 acts on the big diaphragm 13 of supply by the diaphragm pad, makes it break away from nozzle bore, and the big diaphragm 13 of supply is fixed on the housing 3 by gland 10 and clamping nut 9.On gland 10, be screwed malleation and regulate cap 12, regulate assembling malleation regulating spring 16 between cap 12 and the big diaphragm 13 of supply in malleation.Two low tension outlet duct a and b are arranged on the housing 3.The source of the gas of this structure derives from pressure reducer outlet d.

Operation principle: when the pressure reducer of source of the gas exports the d medium pressure supply, enter little thorax chamber B from the medium pressure gas of pressure reducer through quantitative valve rod 2 micropores owing to be in normal pressure (approaching external atmosphere pressure) (setting up in advance makes the big diaphragm 13 of supply be close to nozzle bore) under 16 effects of malleation regulating spring in the air bag 15, pressure increases sharply and forces soft Small diaphragm-piece 7 to be bent downwardly, cause quantitative valve rod 2 to move down, a large amount of gases enter air bag 15 by the supply valve low-pressure channel b that flows through rapidly, make to press in the air bag 15 and increase (height and external atmosphere pressure), because air bag 15 is communicated with low tension outlet duct a, the pressure of therefore big thorax chamber A also increases thereupon, when pressure is loaded greater than the setting of malleation regulating spring 16, the power that the big diaphragm 13 of supply overcomes spring 16 is bent upwards, break away from nozzle bore, the air-flow of B chamber is to the A chamber, the B constant pressure reduces by force, the very fast recovery of Small diaphragm-piece origin-location, on quantitative valve rod 2 under 6 effects of valve rod spring, move the valve of valve-off body 3, stop air feed to b, then by the micropore in the quantitative valve rod 2 to the quantitative air feed of big thorax chamber A, flow into air bag by a.Like this, user's low-pressure system when breathing can remain barotropic state.Both when air-breathing, drops in the low-pressure system, when dropping to the malleation value of regulation,, the A chamber pressure descends, under 16 effects of malleation regulating spring because following the tracks of, the big diaphragm of supply moves down seals nozzle bore, cause the B constant pressure to increase by force, quantitative valve rod 2 pushed away supply valve body 4, in calm the anger and begin to flow into duct b and mend into air bag 15, air bag 15 pressure are increased once more, negative pressure can not occur; The pressure increase of air bag 15 causes the A constant pressure to increase by force thereupon during expiration, move on the big diaphragm 13 of supply, nozzle is opened, B chamber gas flows into the A chamber, and the B constant pressure reduces by force, under the effect of valve rod spring 6, Small diaphragm-piece 7 sets back, close supply valve body 4, then by quantitative valve rod 2 micropores to A chamber air feed, passing hole channel a enters air bag 15.The low pressure respiratory system seals, can only supercharging during expiration and can not step-down, so do not worry occurring in the system negative pressure.Positive laminated structure mainly is to be controlled at not occur negative pressure when air-breathing.Loading spring 17 mainly is to exert pressure to air bag 15, and the barotropic gas to the user provides capacity plays certain tracking air feed effect.The basic functional principle of diaphragm type malleation supply gas control structure that Here it is.

Claims (1)

1. isolation type positive pressure oxygen respirator, it comprises housing, gland, malleation adjusting cap, malleation regulating spring, the big diaphragm of supply, supply spring, nozzle, Small diaphragm-piece, supply valve body, valve screw, quantitative valve rod, malleation regulating spring and supply spring, it is characterized in that: the fixing quantitative valve rod of Small diaphragm-piece inter-burst dress; The external diameter of Small diaphragm-piece is Φ 24mm, middle recessed 1mm, and the thick 1mm in edge, interstitial hole diameter are Φ 1.5mm, quantitatively the dosing hole diameter of valve rod is Φ 0.13-0.16mm.