A double-bag separately controlled positive pressure oxygen breathing circulation gas storage device

Abstract

The present invention relates to the field of personal respiratory protection technology, and specifically to a double-bag separately controlled positive-pressure oxygen breathing circulation gas storage device. In order to overcome the shortcomings of the existing airbags or breathing chambers installed in isolated positive-pressure oxygen respirators, the present invention provides a double-bag separately controlled positive-pressure oxygen breathing circulation gas storage device, which adopts a design structure in which the exhalation bag and the inhalation bag are separately regulated and the airbag built-in tension spring is used to axially retract to ensure positive pressure. When installed in an isolated positive-pressure oxygen respirator, the system is always kept at positive pressure, which can not only improve the breathing comfort performance, but also prolong the breathing protection time, and can effectively implement the protection of the wearer's physical fitness and physical and mental health, which is conducive to improving work efficiency in fire rescue and toxic and harmful working environments. The main feature of the present invention is that it is composed of an exhalation bag, an inhalation bag, a double-bag separately controlled partition, an airbag built-in tension spring and an airbag support frame.

Description

Technical Field

[0001] The invention relates to the technical field of personal respiratory protection, and in particular to a double-bag separately controlled positive-pressure oxygen breathing circulation gas storage device. Background Art

[0002] The low-pressure gas storage part of the isolated positive pressure oxygen respirator is divided into two types: air bag type and breathing chamber type in accordance with the provisions of my country's current industry standards MT867-2000 "Isolated Positive Pressure Oxygen Respirator" and XF632-2006 "Positive Pressure Fire Fighting Oxygen Respirator".

[0003] The low-pressure gas storage part of the existing isolated positive pressure oxygen respirator, whether it is an air bag type or a breathing chamber type, adopts a single bag or single chamber structure, so that the comfort and protection time of exhalation and inhalation are subject to the gas pressure and limited volume in the same bag (chamber). This structure itself restricts the overall improvement of the positive pressure oxygen breathing cycle performance: increasing the gas pressure in the bag (chamber), the positive pressure in the system can fully guarantee and make the inhalation comfortable, but at the same time it increases the exhalation resistance, makes the exhalation difficult, and even makes people feel suffocated; in order to reduce the exhalation resistance and improve the exhalation comfort Adaptability can only be achieved by reducing the gas pressure in the bag (cabin), but this will cause the exhaled recyclable gas and the replenished fresh oxygen to be discharged too frequently and excessively, resulting in a decrease in the gas recycling rate, a shortened protection time, and even an instantaneous negative pressure. The existing positive pressure system generally uses two to three metal positive pressure springs outside the air bag or breathing chamber, and compresses a pressure plate to apply pressure to it to maintain the positive pressure in the system. The external positive pressure spring will vibrate when worn and the axial pressure centerline of the pressure plate will shift, which will affect the reliability and stability. Summary of the invention

[0004] In order to overcome the shortcomings of the existing airbags or breathing chambers installed in isolated positive pressure oxygen respirators, the present invention provides a double-bag separately controlled positive pressure oxygen breathing circulation gas storage device, which adopts a design structure in which the exhalation bag and the inhalation bag are separately regulated and the positive pressure is ensured by axial contraction of a tension spring built into the airbag. A separately controlled partition and an isolated one-way check valve are provided between the double bags. The gas entering the exhalation bag can be supplied to the inhalation bag in a one-way direction, and the gas entering the inhalation bag cannot flow back into the exhalation bag. The fresh oxygen automatically supplied and the mixed gas supplied from the exhalation bag are all sealed and stored in the inhalation bag for circulating inhalation. The tension spring built into the airbag keeps the positive pressure in the system at all times through axial contraction. When installed in an isolated positive pressure oxygen respirator, it can not only improve the breathing comfort performance, but also prolong the breathing protection time.

[0005] The technical scheme for realizing the present invention is: a double-bag separately controlled positive pressure oxygen breathing circulation gas storage device, which is composed of an exhalation bag, an inhalation bag, a double-bag separately controlled partition, a built-in tension spring of the air bag and an air bag support frame.

[0006] The exhalation bag is a horizontal square barrel-shaped axially retractable air storage soft bag made of polyurethane tape by cutting and heat-sealing. The left side is sealed by bonding a square exhalation bag expansion plate made of hard plastic plate. The center of the exhalation bag expansion plate is provided with an expansion plate tension spring positioning lock. The right side is an open barrel mouth. The middle position of the right edge of the back tape is provided with an exhalation input interface made of polyurethane material, the upper right inner corner of the front tape is provided with a quantitative oxygen supply quick interface, and the lower right inner corner of the front tape is provided with a drainer interface made of polyurethane material. The exhalation bag is not only a circulating gas storage device for the exhaled available gas after the purification tank absorbs carbon dioxide and the fresh oxygen input by the quantitative oxygen supply quick interface, but also a regulating device for regulating exhalation resistance and ensuring exhalation comfort.

[0007] The inhalation bag is a horizontal square barrel-shaped axially retractable air storage soft bag made of polyurethane adhesive tape by cutting and heat-sealing. The right side is sealed by bonding a square inhalation bag expansion plate made of hard plastic plate. The center of the inhalation bag expansion plate is provided with an expansion plate tension spring positioning lock. The left side is an open barrel mouth. The middle position of the left edge of the back adhesive tape is provided with an inhalation output interface made of polyurethane material. The lower left inner corner of the front adhesive tape is provided with an automatic replenishment quick interface and is connected to the automatic replenishment valve built into the inhalation bag. The inhalation bag is a gas storage device set for inhalation, used to seal and store the mixed gas supplied from the exhalation bag and the fresh oxygen input by the automatic replenishment valve.

[0008] The double-bag separate-control partition is a square plate partition made of hard plastic plate, used to separate and regulate the exhalation bag and the inhalation bag. It is placed between the barrel opening on the right side of the exhalation bag and the barrel opening on the left side of the inhalation bag and bonded and sealed as a whole. A partition one-way check valve is provided at the center of the double-bag separate-control partition to ensure the one-way circulation of gas, and partition tension spring positioning locks are provided on both sides of the valve opening of the partition one-way check valve.

[0009] The built-in tension spring of the airbag is an axially stretched straight cylindrical coil spring made of steel spring wire. When not under load, the coils are tightened. Two built-in tension springs are provided in the airbag, which are respectively placed in the exhalation bag and the inhalation bag. The two ends of the tension spring are respectively locked with the telescopic plate tension spring positioning lock and the partition plate tension spring positioning lock. Through axial stretching and contraction, they act on the exhalation bag telescopic plate and the inhalation bag telescopic plate respectively to ensure that there is always positive pressure in the respiratory system.

[0010] The airbag support frame is a five-sided frame structure rectangular parallelepiped made of metal strips, and is composed of an upper support frame, a lower support frame, a left support frame, a right support frame and a front support frame. The middle positions of the upper support frame, the lower support frame and the front support frame are respectively provided with protruding partition clamping slots, in which the double-bag separate control partitions are clamped and fixed to horizontally position the exhalation bag and the inhalation bag. Concave support connection fixing holes are respectively provided at both ends of the lower support frame, and an exhaust switch contact positioning lock is provided at the center of the left support frame to lock the exhaust valve switch contacts.

[0011] The support connection fixing holes at both ends of the support lower frame are connected and fixed to the main machine, the exhalation input interface is connected to the cleaning tank, the inhalation output interface is connected to the cooling tank, the drainer interface is connected to the drainer, the quantitative oxygen supply quick interface is connected to the pressure reducer quantitative oxygen supply quick plug, and the automatic supply quick interface is connected to the pressure reducer automatic supply quick plug, to form a double-bag separately controlled positive pressure oxygen breathing circulation gas storage device.

[0012] Open the valve of the main unit's high-pressure oxygen cylinder and enter the working state: the high-pressure oxygen is reduced in pressure by the pressure reducer, one way enters the exhalation bag uninterruptedly through the quantitative oxygen supply quick interface, and the other way enters the inhalation bag through the automatic supply valve connected to the automatic supply quick interface. Since the double-bag separate control partition is equipped with a control one-way check valve and the exhalation valve and inhalation valve in the system are both one-way check valves, it is ensured that the breathing gas in the system always circulates in one direction.

[0013] During inhalation, the low-pressure gas in the inhalation bag enters the mask through the cooling tank, the inhalation hose, and the inhalation valve for the wearer to inhale. When the gas pressure in the inhalation bag drops to the opening pressure setting value of the automatic supply valve, the built-in tension spring of the airbag axially pulls and contracts the expansion plate of the inhalation bag, pushing the automatic supply valve in the bag to open and supply fresh oxygen to the inhalation bag. When the closing setting value is reached, the expansion plate of the inhalation bag extends and disengages from the automatic supply valve to return it to its original position and close, so as to realize oxygen supply on demand and ensure inhalation comfort and effective protection time.

[0014] The exhaled gas during exhalation passes through the exhalation valve, the exhalation hose, and the purification tank to absorb carbon dioxide, enter the exhalation bag, and form a mixed low-pressure gas with the fresh oxygen input from the quantitative oxygen supply quick interface. When the gas pressure in the exhalation bag is greater than the gas pressure in the inhalation bag, the isolation-controlled one-way check valve opens to supply gas to the inhalation bag for circulating inhalation. When the gas pressure in the inhalation bag is equal to or greater than the gas pressure in the exhalation bag, the isolation-controlled one-way check valve closes to prevent it from flowing back. When the gas pressure in the exhalation bag reaches the exhaust opening set value, the exhalation bag telescopic plate axially extends to push the exhaust valve switch contact to open, so that the exhaled gas higher than the exhaust pressure setting value is discharged through the exhaust valve air duct before entering the purification tank, so as to reduce the exhalation resistance and ensure the comfort of exhalation. When the gas pressure in the exhalation bag reaches the exhaust closing set value, the exhalation bag telescopic plate is axially pulled and retracted by the built-in tension spring of the airbag to separate from the exhaust valve switch contact to return it to its position and close, so as to prevent excessive loss of exhaled gas and improve the recycling rate of the gas in the exhalation bag.

[0015] The beneficial effects of the present invention are: a double-bag separately controlled positive-pressure oxygen breathing gas storage device, which adopts a structural design in which the exhalation bag and the inhalation bag are separately regulated and the positive pressure is ensured by axial tension and contraction of the built-in tension spring of the air bag. While the positive pressure in the respiratory circulation system is always maintained during the wearing and use process, it can not only improve the breathing comfort performance, but also prolong the breathing protection time, and can effectively implement the protection of the physical fitness and physical and mental health of the wearer, which is conducive to improving the work efficiency in fire rescue and toxic and harmful working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A cross-sectional structural diagram of a double-bag separately controlled positive pressure oxygen breathing circulation gas storage device

[0017] Figure 2 A top view of the structure of a double-bag separately controlled positive pressure oxygen breathing circulation gas storage device

[0018] In the figure: 1 exhalation bag, 2 inhalation bag, 3 double-bag separate control partition, 4 air bag built-in tension spring, 5 air bag support frame, 6 exhalation bag telescopic plate, 7 exhalation input interface, 8 quantitative oxygen supply quick interface, 9 drainer interface, 10 inhalation bag telescopic plate, 11 inhalation output interface, 12 automatic replenishment quick interface, 13 automatic replenishment valve, 14 telescopic plate tension spring positioning lock, 15 isolation control one-way check valve, 16 partition tension spring positioning lock, 17 support upper frame, 18 support lower frame, 19 support left frame, 20 support right frame, 21 support front frame, 22 partition clamping slot, 23 support connection fixing hole, 24 exhaust switch contact positioning lock, 25 cleaning tank, 26 cooling tank, 27 drainer, 28 pressure reducer quantitative oxygen supply quick plug, 29 pressure reducer automatic replenishment quick plug, 30 exhaust valve switch contact, 31 exhaust valve air guide tube. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] like Figure 1 and Figure 2 As shown, a double-bag separately controlled positive-pressure oxygen breathing circulation gas storage device is composed of an exhalation bag 1, an inhalation bag 2, a double-bag separately controlled partition 3, an airbag built-in tension spring 4 and an airbag support frame 5. The design structure adopts that the exhalation bag 1 and the inhalation bag 2 are separately regulated and the axial tension and contraction of the airbag built-in tension spring 4 is adopted to ensure positive pressure.

[0021] The exhalation bag 1 is a horizontal square barrel-shaped axially telescopic air storage soft bag made of polyurethane adhesive tape by cutting and heat-sealing. The left side is sealed by bonding with a square exhalation bag telescopic plate 6 made of hard plastic plate. The center of the exhalation bag telescopic plate 6 is provided with a telescopic plate tension spring positioning lock 14. The right side is an open barrel mouth. The middle position of the right edge of the back adhesive tape is provided with an exhalation input interface 7 made of polyurethane material, and the upper right inner corner of the front adhesive tape is provided with a quantitative oxygen supply quick interface 8. The lower right inner corner of the front adhesive tape is provided with a drainer interface 9 made of polyurethane material. The exhalation bag 1 is not only a circulating gas storage device for the exhaled usable gas after the purification tank 25 absorbs carbon dioxide and the fresh oxygen input by the quantitative oxygen supply quick interface 8, but also a regulating device for regulating exhalation resistance and ensuring exhalation comfort.

[0022] The inhalation bag 2 is a horizontal square barrel-shaped axially retractable air storage soft bag made of polyurethane adhesive tape by cutting and heat-sealing. The right side is sealed by a square inhalation bag expansion plate 10 made of hard plastic plate. The center of the inhalation bag expansion plate 10 is provided with an expansion plate tension spring positioning lock 14. The left side is an open barrel mouth. The middle position of the left edge of the back adhesive tape is provided with an inhalation output interface 11 made of polyurethane material. The lower left inner corner of the front adhesive tape is provided with an automatic replenishment quick interface 12 and is connected to the automatic replenishment valve 13 built into the inhalation bag. The inhalation bag 2 is a gas storage device set for inhalation, used to seal and store the mixed gas supplied from the exhalation bag 1 and the fresh oxygen input by the automatic replenishment valve 13.

[0023] The double-bag separate control partition 3 is a square plate partition control component made of hard plastic plate and used to separate and regulate the exhalation bag 1 and the inhalation bag 2. It is placed between the barrel opening on the right side of the exhalation bag 1 and the barrel opening on the left side of the inhalation bag 2 and bonded and sealed as a whole. A partition control one-way check valve 15 is provided at the center of the double-bag separate control partition 3 to ensure the one-way circulation of gas, and partition tension spring positioning locks 16 are provided on both sides of the valve opening of the partition control one-way check valve 15.

[0024] The built-in tension spring 4 of the airbag is an axially stretched straight cylindrical coil spring made of steel spring wire. When not under load, the coils are tightened. There are two built-in tension springs 4 in the airbag, which are respectively placed in the exhalation bag 1 and the inhalation bag 2. The two ends of the tension spring are respectively locked with the telescopic plate tension spring positioning lock buckle 14 and the partition tension spring positioning lock buckle 16. Through axial stretching and contraction, they act on the exhalation bag telescopic plate 6 and the inhalation bag telescopic plate 10 respectively to ensure that there is always positive pressure in the respiratory system.

[0025] The airbag support frame 5 is a five-sided frame structure rectangular parallelepiped made of metal strips, and is composed of a support upper frame 17, a support lower frame 18, a support left frame 19, a support right frame 20 and a support front frame 21. The middle positions of the support upper frame 17, the support lower frame 18 and the support front frame 20 are respectively provided with protruding partition clamping slots 22, and the double-bag control partition 3 is inserted and clamped therein to fix the exhalation bag 1 and the inhalation bag 2 horizontally. Concave support connection fixing holes 23 are respectively provided at both ends of the support lower frame 18, and an exhaust switch contact positioning lock 24 is provided at the center position of the support left frame to lock the exhaust valve switch contact 30.

[0026] The support connection fixing holes 23 at both ends of the support lower frame 18 are connected and fixed to the main machine, the exhalation input interface 7 is connected to the cleaning tank 25, the inhalation output interface 11 is connected to the cooling tank 26, the drainer interface 9 is connected to the drainer 27, the quantitative oxygen supply quick interface 8 is connected to the pressure reducer quantitative oxygen supply quick plug 28, and the automatic replenishment quick interface 12 is connected to the pressure reducer automatic replenishment quick plug 29, to form a double-bag separately controlled positive pressure oxygen breathing circulation gas storage device.

[0027] Open the valve of the main machine's high-pressure oxygen cylinder and enter the working state: the high-pressure oxygen is reduced in pressure by the pressure reducer, one way enters the exhalation bag 1 uninterruptedly through the quantitative oxygen supply quick interface 8, and the other way enters the inhalation bag 2 through the automatic supply valve 13 connected to the automatic supply quick interface 12. Since the double-bag separate control partition 3 is provided with a control one-way check valve 15 and the exhalation valve and inhalation valve in the system are both one-way check valves, it is ensured that the breathing gas in the system always circulates in one direction.

[0028] During inhalation, the low-pressure gas in the inhalation bag 2 enters the mask through the cooling tank 26, the inhalation hose and the inhalation valve for the wearer to inhale. When the gas pressure in the inhalation bag 2 drops to the opening pressure setting value of the automatic supply valve 13, the built-in tension spring 4 of the airbag axially contracts the inhalation bag telescopic plate 10 to push the automatic supply valve 13 in the bag to open and supply fresh oxygen to the inhalation bag 1. When the closing setting value is reached, the inhalation bag telescopic plate 10 extends and disengages from the automatic supply valve 13 to return it to its original position and close, so as to realize oxygen supply on demand and ensure inhalation comfort and effective protection time.

[0029] When exhaling, the exhaled gas passes through the exhalation valve, the exhalation hose, the purification tank 25 to absorb carbon dioxide, enters the exhalation bag 1, and forms a mixed low-pressure gas with the fresh oxygen input from the quantitative oxygen supply quick interface 8. When the gas pressure in the exhalation bag 1 is greater than the gas pressure in the inhalation bag 2, the isolation control one-way check valve 15 opens to supply gas to the inhalation bag 2 for circulation inhalation. When the gas pressure in the inhalation bag 2 is equal to or greater than the gas pressure in the exhalation bag 1, the isolation control one-way check valve 15 closes to make it irreversible. When the gas pressure in the exhalation bag 1 reaches When the exhaust is opened at the set value, the exhalation bag telescopic plate 6 extends axially to push the exhaust valve switch contact 30 to open, so that the exhaled gas exceeding the exhaust pressure setting value is discharged through the exhaust valve air duct 31 before entering the purification tank 25, so as to reduce the exhalation resistance and ensure the comfort of exhalation. When the gas pressure in the exhalation bag 1 reaches the exhaust closing set value, the exhalation bag telescopic plate 6 is axially pulled and separated from the exhaust valve switch contact 30 by the built-in tension spring 4 of the airbag, so that it returns to its closed position, prevents excessive loss of exhaled gas, and improves the gas circulation rate in the exhalation bag 1.

[0030] The present invention is installed in an isolated positive pressure oxygen respirator. On the basis of ensuring the positive pressure in the system, it can not only improve the breathing comfort performance, but also prolong the breathing protection time. It can effectively implement the protection of the wearer's physical fitness and physical and mental health, which is conducive to improving the work efficiency in fire rescue and toxic and harmful working environments.

Claims

1. A double-bag separately controlled positive pressure oxygen breathing circulation gas storage device is an air storage bag installed in an isolated positive pressure oxygen respirator, characterized in that: The design structure of the double-bag for exhalation and inhalation separately regulated and the axial retraction of the built-in tension spring to ensure positive pressure comprises an exhalation bag (1), an inhalation bag (2), a double-bag separately controlled partition (3), a built-in tension spring (4) for the air bag and an air bag support frame (5); the exhalation bag (1) and the inhalation bag (2) are horizontal square barrel-shaped air storage soft bags that can be axially retracted, and the left and right sides are provided with an exhalation bag retractable plate (6) and an inhalation bag retractable plate (10) that are bonded and sealed; the double-bag separately controlled partition (3) is placed between the double-bag barrel openings and is bonded and sealed as a whole; a separate control non-return valve (15) is provided at the center of the double-bag separately controlled partition (3), so that the gas entering the exhalation bag (1) can be unidirectionally transported to the inhalation bag (2), and the gas entering the inhalation bag (2) cannot flow back into the exhalation bag (1); the built-in tension spring (4) for the air bag is provided with two springs that are respectively placed on the exhalation bag (1) and the inhalation bag (2) The device is locked inside the body, and the axial tension and contraction act on the exhalation bag expansion plate (6) and the inhalation bag expansion plate (10) respectively to ensure that the system is always positively pressurized; the double-bag separate control partition plate (3) bonded with the exhalation bag (1) and the inhalation bag (2) is installed in the air bag support frame (5) for positioning and fixing; the support connection fixing holes (23) at both ends of the support lower frame (18) of the air bag support frame (5) are connected and fixed to the main machine; the exhalation input interface (7) is connected to the cleaning tank (25); the inhalation output interface (11) is connected to the cooling tank (26); the drainer interface (9) is connected to the drainer (27); the quantitative oxygen supply quick interface (8) is plugged into the quantitative oxygen supply quick plug (28) of the pressure reducer; and the automatic supply quick interface (12) is plugged into the automatic supply quick plug (29) of the pressure reducer, thereby forming a double-bag separate control type positive pressure oxygen breathing circulation gas storage device.

2. A double-bag separately controlled positive pressure oxygen breathing circulation gas storage device according to claim 1, characterized in that The exhalation bag (1) is a horizontal square barrel-shaped air storage soft bag that can be axially retracted and manufactured by cutting and heat-sealing polyurethane adhesive tape. A retractable plate tension spring positioning lock buckle (14) is provided at the center of the retractable plate (6) of the exhalation bag, an exhalation input interface (7) is provided at the middle of the right edge of the back adhesive tape, a quantitative oxygen supply quick interface (8) is provided at the upper right inner corner of the front adhesive tape, and a drainer interface (9) is provided at the lower right inner corner of the front adhesive tape.

3. A double-bag separately controlled positive pressure oxygen breathing circulation gas storage device according to claim 1, characterized in that The air intake bag (2) is a horizontal square barrel-shaped air storage soft bag that is axially retractable and made of polyurethane adhesive tape by cutting and heat-sealing. A retractable plate tension spring positioning lock (14) is provided at the center of the air intake bag retractable plate (10), an air intake output interface (11) is provided at the middle of the left edge of the back adhesive tape, and an automatic replenishment quick interface (12) is provided at the lower left inner corner of the front adhesive tape and is connected to an automatic replenishment valve (13) built into the air intake bag (2).

4. A double-bag separately controlled positive pressure oxygen breathing circulation gas storage device according to claim 1, characterized in that The double-bag control partition (3) is a square plate control partition component made of a hard plastic plate, and is provided with a control one-way check valve (15) and partition spring positioning lock buckles (16) on both sides of the valve port.

5. A double-bag separately controlled positive pressure oxygen breathing circulation gas storage device according to claim 1, characterized in that The airbag internal tension spring (4) is a straight cylindrical helical spring made of steel spring wire and axially stretched and contracted to ensure positive pressure. When no load is borne, the coils are in a tight state.

6. A double-bag separately controlled positive pressure oxygen breathing circulation gas storage device according to claim 1, characterized in that The airbag support frame (5) is a rectangular parallelepiped with five sides made of metal strips, and is composed of an upper support frame (17), a lower support frame (18), a left support frame (19), a right support frame (20) and a front support frame (21). The upper support frame (17), the lower support frame (18) and the front support frame (21) are respectively provided with protruding partition clamping slots (22) at the middle positions inside, the lower support frame (18) is respectively provided with concave support connection fixing holes (23) at both ends, and the center position of the left support frame (19) is provided with an exhaust switch contact positioning lock (24).

Images