RU2577222C1 - Breathing apparatus test stand - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: breathing apparatus test stand comprises an assembly simulating human breathing, with a pump 1, which is provided with a hydro chamber 2 wherein a test breathing apparatus 3 is placed for executing water medium tests; the hydro chamber is connected to an air flow inlet and drain main line 4 configured attachable to the breathing apparatus. The hydro chamber is mounted in a climate chamber and provided with a fixing device 6, an imbedding device 7 and a spatial repositioning device for the breathing apparatus or components thereof. The fixing device for the breathing apparatus or components thereof is configured in the form of a support and collar. The imbedding device represents a screw pair kinematically connected to the support. The spatial repositioning device for the breathing apparatus or components thereof represents a screw pair mounted on the hydro chamber.

EFFECT: stand provides testing the breathing apparatuses in the water medium with the spatial repositioning of the apparatus.

6 cl, 6 dwg

Description

The invention relates to testing respiratory devices.

A well-known test bench for breathing apparatus, containing a stimulator of air movement, including a pump with a drive having a crank mechanism, a device for gas exchange and conditioning of exhaled air and a device for sampling inhaled air, a device for sampling inhaled air is made in the form of a rigid hermetic shell with an elastic container located inside it, the shell and the container via a switch connected respectively to the air pump and to the test apparatus. (USSR AS No. 720201, ΜΠΚ A62B 27/00, 1984).

The disadvantage of this device is the inability to test the breathing apparatus when immersed in water and the inability to test the apparatus with periodic changes in its spatial position.

A well-known stand is a simulator of external respiration of a person, including an inducer of air movement - an "artificial lung" pump, connected at the inlet through a valve with a carbon dioxide dispenser and through a valve box with inspiration and expiration valves, with a thermostat, with a humidifier, and a climate chamber. The stand is also equipped with a carbon dioxide analyzer connected to the supply line, temperature and humidity sensors, a device for measuring breathing resistance. The climate chamber is also connected to a sampling pump connected to a carbon dioxide analyzer. (National standard of the Russian Federation. GOST 32 53260-2009. Firefighting equipment. Insulating self-rescuers with chemically bound oxygen to protect people from toxic combustion products during evacuation from smoky rooms during a fire. General technical requirements. Test methods with respiratory mask (NPB 165 -2001. Fire-fighting equipment. Breathing apparatus with compressed air for firefighters. General technical requirements. Test methods. M: Standartinform, 2009).

The disadvantage of this device is the inability to test the breathing apparatus when immersed in water and the inability to test the apparatus with periodic changes in its spatial position.

Also known is a test bench for breathing apparatus, comprising a node simulating human respiration, with contact devices and pumps, for example piston pumps, and a line for supplying and venting air pressure, in which for testing in an aqueous medium under pressure and creating smoothness in the operation of the unit, simulating breathing, it has a hydrochamber for placement of the test breathing apparatus, connected to the line for supplying and venting air pressure and the piston spaces of the unit pumps imitating a person’s breathing. (USSR AS No. 361613, IPC A62B 27/00, B63C 11/00, publ. 1999).

The disadvantage of this device is the inability to test the breathing apparatus in conditions of its use by underwater swimmers, who, when scuba diving, can change their spatial position from horizontal to vertical - when diving and surfacing, as well as in any other intermediate positions.

The objective of the invention is to create a stand that simulates the conditions of use of the breathing apparatus by underwater swimmers.

The technical result of the invention is to provide testing of the breathing apparatus, or a part thereof, in an aqueous medium with a predetermined temperature and changing the spatial position of the apparatus or its part.

The problem is solved by the implementation of a test bench for breathing apparatus, containing a node that simulates human breathing, with a pump, for example a piston, in which for testing in an aqueous medium there is a hydraulic chamber for placing the test breathing apparatus, connected to the line for supplying and venting the air flow, made with the ability to connect with a breathing apparatus, and the difference between the proposed device from the known one is the installation of a hydro chamber - installed in a Ameri - supply and fixing device, immersing the device and the device changes the spatial position of the breathing apparatus, or parts thereof.

The fixing device of the breathing apparatus or its parts can be made in the form of a stand with side stops and a clamp connected by a vertical strut.

The immersion device can be made in the form of a screw pair kinematically connected to the stand, mounted on racks connected by a transverse connection and equipped with trunnions mounted in supports fixed to the walls of the hydraulic chamber.

The device for changing the spatial position of the breathing apparatus or its parts can be made in the form of a screw pair mounted on a hydraulic chamber, and the movable link is connected to the wings, fixedly mounted on the axle.

The hydrocamera can additionally be equipped with a mixing device in the form of a bubbler connected to an air flow inducer.

The breathing apparatus can be connected with a flexible hose to the fitting mounted on the wall of the hydrochamber, and to the line connecting the artificial lungs to the pump.

Installing a hydraulic chamber in the climate chamber and supplying it with a fixing device, an immersion device and a device for changing the spatial position of the breathing apparatus or its parts provides testing of the breathing apparatus, or part of it - an absorbing cartridge in an aqueous medium with a given temperature and changing the spatial position of the cartridge or device when testing it and is characterized by simplicity of design and reliability.

The implementation of the fixing device of the breathing apparatus or its parts in the form of a stand with side stops and a clamp connected by a vertical strut provides testing of the breathing apparatus, or its part - an absorbing cartridge in an aqueous medium with a given temperature and changing the spatial position of the cartridge or apparatus during its testing.

The implementation of the immersion device in the form of a screw pair kinematically connected to the stand, mounted on racks, connected by a transverse connection and equipped with trunnions mounted in supports mounted on the walls of the pressure chamber, provides the convenience of mounting the breathing apparatus, or part of it — the absorption cartridge when the pressure chambers are extended above the aqueous medium supports and clamp for attaching a cartridge or apparatus in preparation for testing, the convenience of immersing the apparatus in an aqueous environment and dismantling after testing. The device is characterized by simplicity and reliability.

The implementation of the device for changing the spatial position of the breathing apparatus or its parts in the form of a screw pair mounted on a hydraulic chamber, and the movable link is connected to the rocker, fixed on the trunnion provides testing of the breathing apparatus, or part of it - an absorbing cartridge in an aqueous medium and changing the spatial position of the cartridge or apparatus when it is tested without extraction from the hydro chamber during the test.

An additional supply of the hydrochamber with a mixing device in the form of a bubbler connected to an air flow inducer ensures the creation of a uniform temperature field in the hydrochamber and the intensification of heat transfer from the device under test to the aqueous medium with a given temperature and is characterized by its simplicity and reliability. When using additional refrigerant in the form of polymer bags with frozen water during testing, the duration of the removal of the hydrochamber to a given temperature regime is reduced due to intensive mixing.

The connection of the breathing apparatus with a flexible hose with a fitting mounted on the wall of the hydraulic chamber, and with the line connecting the “artificial lungs” to the pump, makes it possible to change the spatial position of the cartridge or device in the aquatic environment without additional disassembly and assembly of the supply line. At the same time, moisture is removed from the apparatus from condensed water vapors from exhaled air and reaction water during its testing.

The invention is illustrated by drawings, which show:

figure 1 - diagram of the stand, including the apparatus "artificial lungs", a climatic chamber in which is placed a hydro chamber with the test apparatus.

in FIG. 2 is a side view camera with a test apparatus in three positions.

in FIG. 3 - hydrochamber, top view from the side of the drain pipe.

in FIG. 4 is the same as in FIG. 3, view from the side of the air pipe.

in FIG. 5 - the attachment points of the cartridge, the immersion unit and the node changes the spatial position.

in FIG. 6 is the same as in FIG. 5, with the absorption cartridge installed.

The list of items indicated in the drawings:

1. The pump "artificial lungs."

2. Hydrocamera.

3. Test apparatus.

4. The highway.

5. Climatic chamber.

6. Device fixing device.

7. Device immersion apparatus.

8. The device changes the spatial position.

9. Stand.

10. Lateral emphasis.

11. The clamp.

12. The stand is vertical.

13. Screw pair.

14. The stand.

15. The connection is transverse.

16. The axle.

17. Support.

18. Screw pair.

19. The link is movable.

20. The wings.

21. The bubbler.

22. The fan.

23. Hose.

24. The pipe of the gas-air mixture (DHW).

25. The drain pipe.

26. Bracket.

27. The valve.

28. Rotameter.

29. The line of supply of carbon dioxide.

30. Valve box with inspiratory and expiratory valves.

31. Thermostat with humidifier.

32. 32 (1), 32 (2) Gas analyzer pump.

33. 33 (1), 33 (2) Carbon dioxide gas analyzer.

34. Temperature and humidity sensors.

35. A device for measuring breathing resistance.

The test bench for breathing apparatus contains a pump 1, preferably a piston, a hydro chamber 2 in which a test breathing apparatus 3 is installed, connected to a line 4 for supplying and discharging the air flow, which is configured to connect to the breathing apparatus. The hydraulic chamber 2 is installed in the climate chamber 5 and is equipped with a device fixing device 6, an immersion device 7 and a device for changing the spatial position of the breathing apparatus or its parts 8. The fixing device of the breathing apparatus or its parts 6 is made in the form of a stand 9 with side stops 10 and a clamp 11, connected by a vertical strut 12. The immersion device 7 is made in the form of a screw pair 13 kinematically connected to the stand, mounted on struts 14 connected by a transverse connection 15. Sleep racks 14 the wife with pins 16 installed in the supports 17, mounted on the walls of the hydraulic chamber 2. The device for changing the spatial position of the breathing apparatus or its parts 8 is made in the form of a screw pair 18, mounted in the supports 19 on the hydraulic chamber 2, and the nut of the screw pair 18 is connected to the wings 20 and fixedly mounted on the pin 16. The chamber 2 is additionally equipped with a mixing device in the form of a bubbler 21, made in the form of a perforated pipe and fan 22, or an air line. The test breathing apparatus 3 is connected by a flexible hose 23 to the pipe of the gas-air mixture (DHW) 24 mounted on the wall of the hydrochamber 2 and to the line 4 connecting the breathing apparatus 3 to the artificial lung pump 1. The pressure chamber 2 is equipped with a drain pipe 25 with corresponding shutoff valves and brackets 26 for installation in a hydro chamber 2 thermocouples and additional coolers in the form of polymer bags with a refrigerant, such as ice (not shown).

The pump “artificial lungs 1 is connected through a valve 27 and a rotameter 28 with a carbon dioxide dosing line 29 through a valve box with inhalation and exhalation valves 30, connected by a line 4 to the test apparatus 3. Line 4 is also connected to a thermostat with a humidifier 31. At the inlet and at Exit from the climate chamber 5, gas analyzer pumps 32 (1) and 32 (2) are installed, connected respectively to carbon dioxide gas analyzers 33 (1) and 33 (2). At the entrance of the climate chamber 5, temperature and humidity sensors 34 and a device for measuring breathing resistance 35 are also installed.

The device operates as follows.

The stand 9 is installed in the upper position by the immersion device of the apparatus 7 by moving the screw pair 13. On the stand 9 between the lateral stops 10 of the device 6 fixing device, the test apparatus 3 is mounted and secured with a clamp 11 fixed to the stand 14. The test apparatus 3 is connected by hoses 23 to the gas-air pipes mixture (dhw) 24 and is moved to its lowest position by the device 7 immersion device by moving relative to the racks 14 of the stand 9 and the clamp 11 with a screw pair of the device 7. Then ata installed in a climatic chamber 5 gidrokamera 2 is filled with water. In the climate chamber 5, a predetermined temperature is set in the range from minus 2 to plus 30 ° C using known means (not shown). When testing the apparatus at a low temperature to accelerate cooling, additional coolers are installed in the form of polymer ice bags on the brackets 26 and a fan 22 is turned on, which supplies air to the bubbler 21 to intensify the mixing of water in the hydro-chamber 2. After reaching the preset temperature in the hydro-chamber 2, the pump “ artificial lungs ”1, which takes in ambient air through the valve box 30 when it is inhaled and, when exhaled, delivers gas-air mixture through the line 4 into the thermostat with a humidifier 31 sh (DHW). DHW is formed by supplying to the pump 1 through the valve 27 from the carbon dioxide supply line 29 through the flow meter 28 a measured amount of carbon dioxide, the content of which is measured by the gas analyzer (1), by pump 32 (1) at the outlet of the thermostat with a humidifier 31. To create in the pressure chamber 2 of the uniform temperature field, a fan 22 is turned on, supplying air to the bubbler 21, which provides mixing of the water. The operation of the thermostat with a humidifier 31 can be adjusted according to the readings of temperature and humidity sensors 34. When the “artificial lungs” pump 1 is operating, the amount of backwater in front of the test apparatus 3 is measured by a respiratory resistance measuring instrument 35. A device for changing the spatial position of the apparatus 3 is used 8. When the handle is rotated, the nut fixed in the supports 19 of the screw pair 18 moves the link 20, which rotates the rack 14 together with the pins 16 and the transverse link Strongly 15 in supports 17 fixed to gidrokamere 2.

Tests of the apparatus are carried out until a given concentration of carbon dioxide in the cleaned air is achieved by sampling with a pump 32 (2) and measuring the concentration of carbon dioxide with a gas analyzer 33 (2).

After testing the apparatus 3, water from the hydraulic chamber 2 is removed through the drain pipe 25 and the apparatus 3 is discharged in the reverse order described above.

The device provides a test of breathing apparatus in an aqueous environment with a changing spatial position of the apparatus and is characterized by the simplicity of design and ease of testing, as well as equipment and gearing.

Claims (6)

1. A test bench for breathing apparatus, comprising a unit simulating human respiration, with a pump, for example a piston, in which for testing in an aqueous medium there is a hydrochamber for placing the test breathing apparatus, connected to a line for supplying and venting the air flow, configured to connection with a breathing apparatus, characterized in that the hydrochamber is installed in the climate chamber and is equipped with a fixing device, an immersion device and a change device anstvennogo provisions contained breathing apparatus, or parts thereof. 2. The stand according to claim 1, characterized in that the fixing device of the breathing apparatus or its parts is made in the form of a stand with side stops and a clamp connected by a vertical stand. 3. The stand according to claim 1, characterized in that the immersion device is made in the form of a screw pair kinematically connected to the stand, mounted on racks connected by a transverse connection and equipped with trunnions mounted in supports mounted on the walls of the hydraulic chamber. 4. The stand according to claim 1, characterized in that the device for changing the spatial position of the breathing apparatus or its parts is made in the form of a helical pair mounted on a hydraulic chamber, and the movable link is connected to the link, fixedly mounted on the axle. 5. The stand according to claim 1, characterized in that the hydrochamber is additionally equipped with a mixing device in the form of a bubbler connected to an air flow inducer. 6. The stand according to claim 1, characterized in that the breathing apparatus is connected by a flexible hose to the fitting mounted on the wall of the hydrochamber and to the line connecting the artificial lungs to the pump.

Images