CN111529979A - Positive pressure air respirator for easy access to air pressure - Google Patents

Abstract

The invention relates to a fire-fighting apparatus. The utility model provides a positive pressure type air respirator convenient to learn atmospheric pressure, includes headgear and air bottle, the upper end of air bottle is equipped with the valve, be equipped with the gauze mask in the headgear, the gauze mask is equipped with and link up the air inlet of headgear, the gas outlet of pneumatic valve is in the same place with three way connection's first interface connection, three way connection's second interface connection have the manometer, the third interface pass through the hose with the air inlet links together. The invention aims to provide a positive pressure type air respirator convenient for obtaining air pressure, and solves the problem that the air pressure in an air bottle cannot be obtained by the air pressure of the conventional positive pressure type air respirator.

Description

Positive pressure air respirator for easy access to air pressure

This case is a divisional application with the application number 2018103089265, the application date is April 9, 2018, and the title is "positive pressure air respirator for easy access to air pressure".

technical field

The present invention relates to fire fighting equipment, in particular to a positive pressure air breathing apparatus which is convenient for obtaining air pressure.

Background technique

The positive pressure-relieving air respirator is an isolated respirator that uses compressed air as the breathing air source. Pressure type, that is, when a person wears a respirator for breathing, the entire respiratory system is always isolated from the outside world and the internal pressure is higher than the external environmental pressure. During the breathing process, the outside toxic and harmful gases cannot enter the respiratory system to ensure safe and reliable respiratory protection. . The equipment has been widely used in many fields such as fire fighting, chemical defense, anti-terrorism, emergency response, and emergency rescue.

With the rapid development of my country's economy and the frequent occurrence of natural disasters in recent years, emergency rescue work has also shown a complex development trend across industries, fields and regions. Although my country has done a lot of work in the construction of emergency rescue system, accident and disaster handling and prevention, it is still in its infancy in many aspects such as rescue technology and tactics research, especially in the development of emergency rescue technology and equipment, there is still a big gap with foreign countries. . How to make use of the existing conditions such as the lack of advanced and supporting rescue equipment in our country's rescue teams, maximize the effectiveness of the existing equipment such as positive pressure air respirators, and improve the level of rescue, is the first and foremost to quickly improve the combat effectiveness of the rescue team in the short term Task. In the patent document with the publication number CN2565465Y, an existing positive pressure air respirator is disclosed. The basic structure of the positive pressure air respirator includes an air bottle, a mask and a device for fixing the air bottle on the back of the user. The shoulder strap structure, the upper end of the air bottle is provided with a valve.

The existing positive pressure air respirator has the following shortcomings: it is impossible to know the pressure in the air bottle during use. For the sake of safety, after every set period of use, no matter whether the gas is used up or not, the gas is refilled. It is not possible to maximize the duration of use.

SUMMARY OF THE INVENTION

The present invention aims to provide a positive pressure air respirator which is convenient to know the air pressure, and solves the problem that the air pressure in the existing positive pressure air respirator cannot know the air pressure in the gas cylinder.

The above technical problems are solved by the following technical solutions: a positive pressure air respirator which is easy to know the air pressure, including a headgear and an air bottle, the upper end of the air bottle is provided with a valve, and the headgear is provided with a mask, so The mask is provided with an air inlet that penetrates through the headgear, and is characterized in that the air outlet of the valve is connected with the first interface of the three-way joint, and the second interface of the three-way joint is connected with a pressure gauge, a second interface. The three ports are connected with the air inlet through a hose. Set up a pressure gauge, you can know how much air pressure is in the gas cylinder, and you can use it to re-tank when the air pressure is too low to meet the requirements to maximize the use time.

Preferably, the pressure gauge is connected with the second interface of the three-way joint through a hose with a length of more than 60 cm. When carried on the back, the pressure gauge can be moved to the position observed by the user, which improves the convenience of viewing the pressure gauge.

Preferably, the headgear is provided with a buffer air bag, the mask is provided with a cover plate closing spring and an inhalation-driven cover plate opening mechanism, and the mask is provided with an oxygen bag interface that communicates with the buffer air bag. The oxygen bag interface is provided with an oxygen bag interface cover plate, the cover plate closing spring is used to drive the oxygen bag interface cover plate to close the oxygen bag interface, and the inhalation-driven cover plate opening mechanism is used to overcome the The cover plate closes the elastic force of the spring to open the oxygen bag interface cover plate. The suction-driven cover plate opening mechanism includes a cylinder, a pry bar hinged in the mask and a balance plug located in the cylinder. One end is connected with the oxygen bag interface cover, and the other end is connected with the balance plug. The force arm of the balance plug to drive the pry bar to rotate is greater than that of the cover plate closing spring to drive the pry bar to rotate. In the initial state, the air pressure of the open mouth is greater than or equal to the air pressure of the sealed cavity, and the oxygen bag interface cover plate closes the residence The oxygen bag interface; when the pressure in the opening cavity decreases due to inhalation, the pressure difference between the sealing cavity and the opening cavity drives the balance plug to move toward the opening cavity, so that the crowbar swings and overcomes the elastic force of the cover plate closing spring to make The oxygen bag interface cover is opened. The cushioning airbag is provided, which can pass the safety of the headgear. When in use, oxygen is filled in the buffer air bag and the air pressure in the buffer air bag is greater than 1.5 standard atmospheric pressure. When exhaling, the air pressure in the mask rises, so that the balance plug moves toward the sealing cavity. The moving structure is that the balance plug drives the oxygen bag interface cover plate to move toward the oxygen outlet through the lever to avoid the buffering air bag. Oxygen flows out and is wasted. When inhaling, the air pressure in the mask decreases, so that the balance plug moves toward the opening under the action of the pressure difference. The result of the movement is that the balance plug drives the oxygen bag interface cover to open through the crowbar, so that the oxygen in the buffer bag flows out. It is inhaled by the user into the mask, which increases the oxygen content of the inhaled gas and avoids the user's discomfort due to lack of oxygen in the fire area.

Preferably, the oxygen bag interface is communicated with the buffer air bag through a communication pipe, and a manual valve is provided on the communication pipe. It enables the user to reuse the oxygen in the buffer air bag when the user feels hypoxia.

Preferably, the headgear is provided with a neck section sleeved on the neck of the user, the neck section is a flexible structure, the neck section is provided with a neck section retracting mechanism, and the neck section is The retracting mechanism includes an annular cavity extending circumferentially along the neck segment, a rope unwinding and tightening mechanism, and a rope passing through the annular cavity, the rope unwinding and tightening mechanism including a circular arc tube extending circumferentially along the annular cavity , the wall of the arc tube is provided with a cable movement gap extending along the extension direction of the arc tube, the arc tube is provided with two connecting blocks, and the arc tube is located between the two connecting blocks and extends along the extending direction of the annular tube. The rubber air rod and the connecting block closing spring that drives the two connecting blocks to close together, the two ends of the rope are crossed and connected with the two connecting blocks in a one-to-one correspondence, and the rubber air rod is connected with an air charging and discharging port . A technical solution with different technical concepts is provided for realizing the closing and fixing of the lower end of the headgear and the neck.

The present invention also includes a control device, the neck segment retraction mechanisms have two and are distributed in the up and down direction, the inflation and deflation ports are connected with an inflation and deflation pump, and the control device controls the two neck segment retraction mechanisms The ropes are tied alternately at set intervals. It can avoid neck injury caused by the rope being fastened at the same position on the user's neck for a long time.

Preferably, the inflation and deflation pump is connected with the buffer air bag.

The invention has the following advantages: the air pressure in the air bottle can be easily known, and the air pressure can be refilled when the air pressure is too low to meet the requirements, so as to maximize the use time.

Description of drawings

FIG. 1 is a schematic diagram of Embodiment 1 of the present invention.

FIG. 2 is a schematic structural diagram of a headgear in Embodiment 2 of the present invention.

FIG. 3 is a partial enlarged schematic diagram of part B of FIG. 2 .

FIG. 4 is a schematic sectional view taken along the line C-C of FIG. 2 .

FIG. 5 is a schematic diagram of the connection control relationship between the neck segment retracting and dispersing mechanism and the buffer airbag.

In the figure: air bottle 1, reinforcement cover 11, head cover 2, head section 21, neck section 22, buffer air bag 23, oxygen bag interface 24, communication tube 25, manual 26, air inlet 27, oxygen bag interface cover 28. Mask 29, cover plate closing spring 30, valve 4, first port 41, second port 42, third port 43, pressure gauge 44, rubber tube 45, tee joint 46, hose 47, neck section Dispersion mechanism 5, suspension ring 51, rope 52, one end of the rope 521, the other end of the rope 522, rope unwinding and tightening mechanism 53, circular arc tube 531, cable movement gap 5311, connecting block 532, rubber gas rod 533, The rubber air rod is connected with a charging and discharging port 5331, a control device 534, a charging and discharging pump 535, a one-way valve 6, a suction-driven cover plate opening mechanism 7, a cylinder 71, a sealing chamber 711, an opening chamber 712, a pry bar 72, balance Plug 73 , hinge pin 74 .

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments.

Embodiment 1, referring to FIG. 1 , is a positive pressure air respirator which is convenient to know the air pressure, including a headgear 2 and an air bottle 1 .

The headgear 2 is provided with an air inlet 27 . A mask 29 is provided inside the headgear 2 (see Figure 2). The air inlet communicates with the inside of the mask.

The upper and lower ends of the air bottle 1 are provided with reinforcing sleeves 11 . The upper end of the air bottle 1 is provided with a valve 4 . The air outlet of the valve 4 is connected with the first port 41 of the three-way joint 46 . A pressure gauge 44 is connected to the second port 42 of the three-way joint 46 through a hose 47 . The length of the hose 47 is 60 cm or more. The third port 43 of the three-way joint 46 is connected with the air inlet of the mask through a rubber tube 45 .

Watch the air pressure through a pressure gauge when in use.

Embodiment two, the difference with embodiment one is:

Referring to Figure 2, the mask is provided with a cover closing spring 30 and an inhalation-driven cover opening mechanism 7. An oxygen bag interface 24 that communicates with the buffer air bag is provided in the cover. The oxygen bag interface is provided with an oxygen bag interface cover plate 28 . The cover plate closing spring is used to drive the oxygen bag interface cover plate to close the oxygen bag interface. The suction-driven cover plate opening mechanism is used to overcome the elastic force of the cover plate closing spring to open the oxygen bag interface cover plate. The suction-driven cover plate opening mechanism includes a cylinder 71 , a pry bar 72 and a balance plug 73 located in the cylinder. The pry bar 72 is hinged in the cover body 31 through the hinge pin 74 . One end of the pry bar is connected with the oxygen bag interface cover, and the other end is connected with the balance plug. The force arm of the balance plug driving the crowbar to rotate with the hinge pin as the axis is greater than the force arm of the cover plate closing spring to drive the crowbar to rotate with the hinge pin as the axis. The balance plug divides the cylinder into a sealed cavity 711 and an open mouth 712 that communicates with the mask; in the initial state, the air pressures of the sealed cavity and the open mouth are equal, and the oxygen bag interface cover plate closes the oxygen bag interface 24 under the action of the cover plate closing spring ; During use, when inhaling, the air pressure in the mask drops, so that the pressure in the opening cavity drops, and the pressure difference between the sealing cavity and the opening cavity drives the balance plug to move toward the opening cavity, so that the crowbar swings to overcome the elastic force of the closing spring of the cover plate. And make the oxygen bag interface cover open. When exhaling, the pressure in the mask rises, which increases the pressure in the opening cavity. The pressure difference between the sealing cavity and the opening cavity drives the balance plug to move toward the sealing cavity, so that the lever swings and assists the cover plate to close the spring to make the oxygen bag interface cover more flexible. For the reliable oxygen bag interface cover the oxygen bag interface. The oxygen bag interface communicates with the buffer air bag through the communication pipe 25 . A manual valve 26 is provided on the communication pipe.

Referring to Figures 3 and 4, the cord release tie mechanism 53 includes a circular arc tube 531 extending circumferentially of the annular cavity. The wall of the arc tube is provided with a cable moving gap 5311 extending along the extending direction of the arc tube. The circular arc tube is provided with two connecting blocks 532 and a rubber gas rod 533 located between the two connecting blocks and extending along the extending direction of the annular tube. The two connecting blocks 532 are connected together by a connecting block closing spring (not shown in the figure) that drives the two connecting blocks to close together. One end 521 of the rope and the other end 522 of the rope are crossed and connected to the two connecting blocks in a one-to-one correspondence. The cord release tie-down mechanism 53 also includes a control device 534 . The rubber air rod is connected with an inflation and deflation port 5331. The inflation and deflation port communicates with the buffer airbag through the inflation and deflation pump 535 .

Referring to Fig. 2, Fig. 3 and Fig. 4, the control device controls the ropes of the two neck segment retraction and unwinding mechanisms to be tightened alternately according to the set time interval, specifically, the lower rope is tightened first to make the neck segment contract during use. Tie it tightly on the user's neck to reduce the external air entering the headgear and irritate the eyes. After the set time period, the upper rope is tightened to make the neck segment shrink and tighten. After the upper rope is tightened, the lower one is loosened. The rope, after a long period of time, the lower rope is tightened to make the neck segment shrink and tighten, and the lower rope is tightened and then the upper rope is loosened, so as to achieve alternate tightening.

Referring to Figure 4, the process of tightening and loosening the rope is as follows: when tightening, the inflatable rod is inflated by the inflation and deflation pump, and the inflatable rod is inflated to drive a pair of connecting blocks apart, so that the ring enclosed by the rope is reduced to realize the tying Tightening; when loosening, the two-way air pump pulls out the gas in the inflatable rod, so that the inflatable rod collapses and loses its support function. Under the action of the connecting block closing spring, the two connecting blocks are closed, so that the rope loses tension and realizes loosening. .

Claims (3)

1. A positive pressure air respirator convenient for obtaining air pressure comprises a head cover and an air bottle, wherein a valve is arranged at the upper end of the air bottle, a mask is arranged in the head cover and is provided with an air inlet communicated with the head cover, the positive pressure air respirator is characterized in that an air outlet of the valve is connected with a first interface of a three-way joint, a second interface of the three-way joint is connected with a pressure gauge and a third interface of the three-way joint is connected with the air inlet through a hose, the head cover is provided with a neck section sleeved on the neck of a user, the neck section is of a flexible structure and is provided with a neck section folding and unfolding mechanism, the neck section folding and unfolding mechanism comprises an annular cavity extending along the circumferential direction of the neck section, a rope unfolding mechanism and a rope penetrating through the annular cavity, the rope unfolding mechanism comprises an arc tube extending along the circumferential direction of the annular cavity, and a rope moving gap extending along the extending direction, the two ends of the rope are connected with the two connecting blocks in a one-to-one correspondence mode after crossing, and the rubber air rod is connected with an air charging and discharging port; the mask is internally provided with a buffer air bag, the mask is internally provided with a cover plate folding spring and a suction driving type cover plate opening mechanism, the mask is internally provided with an oxygen bag interface communicated with the buffer air bag, the oxygen bag interface is provided with an oxygen bag interface cover plate, the cover plate folding spring is used for driving the oxygen bag interface cover plate to seal the oxygen bag interface, the suction driving type cover plate opening mechanism is used for overcoming the elasticity of the cover plate folding spring to open the oxygen bag interface cover plate, the suction driving type cover plate opening mechanism comprises a cylinder, a pry bar hinged in the mask and a balance plug positioned in the cylinder, one end of the pry bar is connected with the oxygen bag interface cover plate, the other end of the pry bar is connected with the balance plug, and the force arm of the balance plug driving the pry bar to rotate is larger than the force arm of the cover plate folding spring, the balance plug divides the cylinder into a sealed cavity and an open cavity communicated with the mask; in an initial state, the air pressure of the opening cavity is greater than or equal to the air pressure of the sealing cavity, and the oxygen bag interface is sealed by the oxygen bag interface cover plate; when the pressure in the opening cavity is reduced due to air suction, the pressure difference between the sealing cavity and the opening cavity drives the balance plug to move towards the opening cavity, so that the prying bar swings to overcome the elastic force of the cover plate folding spring to open the oxygen bag interface cover plate; the positive pressure air respirator convenient for obtaining air pressure further comprises a control device, the two neck section folding and unfolding mechanisms are distributed along the vertical direction, the air charging and discharging port is connected with an air charging and discharging pump, and the control device controls the ropes of the two neck section folding and unfolding mechanisms to be alternately fastened according to a set time interval; the inflation and deflation pump is connected with the buffer air bag.

2. The positive pressure air respirator convenient for air pressure to know as claimed in claim 1, wherein the pressure gauge is connected with the second port of the three-way joint through a hose with a length of more than 60 cm.

3. The positive pressure air respirator convenient for obtaining air pressure as claimed in claim 1, wherein the oxygen bag port is communicated with the buffer air bag through a communicating tube, and a manual valve is arranged on the communicating tube.

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