CN218211830U

CN218211830U - Expiratory valve gas tightness detection device

Info

Publication number: CN218211830U
Application number: CN202220365852.0U
Authority: CN
Inventors: 钱辉; 江宜瑾; 杨森; 张永顺
Original assignee: Jiangsu Special Safety Protection Product Quality Supervise Examination Center
Current assignee: Jiangsu Special Safety Protection Product Quality Supervise Examination Center
Priority date: 2022-02-23
Filing date: 2022-02-23
Publication date: 2023-01-03
Anticipated expiration: 2032-02-23

Abstract

The utility model discloses an expiratory valve gas tightness detection device, install in airtight cavity (3) breather valve (4), one side of airtight cavity (3) is equipped with air inlet pipe way (5), the one end of air inlet pipe way (5) sets up to air inlet (6), the other end and airtight cavity (3) of air inlet pipe way (5) are linked together, opposite side at airtight cavity (3) is equipped with air outlet pipe way (7), the one end and airtight cavity (3) of air outlet pipe way (7) are linked together, the bottleneck that passes buffer container (2) again behind the other end of air outlet pipe way (7) stretches out breather valve test fixture device in proper order enters into buffer container (2), be equipped with between the extraction opening of buffer container (2) and vacuum pump (1) extraction pipeline (8), the other end of extraction pipeline (8) is linked together with the extraction opening of vacuum pump (1). The utility model discloses can detect expiratory valve's the airflow of revealing effectively, simple structure has improved the result of use of breathing machine greatly moreover.

Description

Expiratory valve gas tightness detection device

Technical Field

The utility model relates to an expiratory valve gas tightness detection device.

Background

At present, the leakage airflow of the exhalation valve of each respirator should not be greater than 30mL/min, if a mask is provided with a plurality of exhalation valves, the leakage airflow of each exhalation valve should be evenly divided, for example, if the respirator mask is provided with 2 exhalation valves, the leakage airflow of each exhalation valve should not be greater than 15mL/min, so the detection of the leakage airflow of the exhalation valve is very important for the use of the respirator, but the current prior art is not specially used for detecting the airtightness of the exhalation valve, and if the exhalation valve of the respirator fails, the use effect of the exhalation machine is greatly reduced.

Disclosure of Invention

The utility model provides an expiratory valve gas tightness detection device, it can detect the airflow of revealing of expiratory valve effectively, simple structure detects the convenience moreover, has improved the result of use of breathing machine greatly.

The utility model adopts the following technical scheme: the air tightness detection device mainly comprises a vacuum pump, a buffer container and an expiratory valve test fixture, wherein a closed cavity is arranged in the expiratory valve test fixture, a breather valve is installed in the closed cavity, an air inlet pipeline is arranged on one side of the closed cavity, one end of the air inlet pipeline is set to be an air inlet, the other end of the air inlet pipeline is communicated with the closed cavity, the air inlet is positioned outside the expiratory valve test fixture, an air outlet pipeline is arranged on the other side of the closed cavity, one end of the air outlet pipeline is communicated with the closed cavity, the other end of the air outlet pipeline sequentially extends out of the expiratory valve test fixture and then penetrates through a bottle opening of the buffer container to enter the buffer container, an air exhaust pipeline is arranged between the buffer container and an air exhaust opening of the vacuum pump, one end of the air exhaust pipeline is positioned in the buffer container, and the other end of the air exhaust pipeline is communicated with an air exhaust opening of the vacuum pump.

The air inlet of the air inlet pipeline is provided with an air flow sensor, the signal input end of the air flow sensor is positioned at the air inlet of the air inlet pipeline, and the signal output end of the air flow sensor is connected with a display I. The air outlet pipeline is connected with a pressure sensor, the pressure sensor is positioned at the part between the breather valve test fixture device and the buffer container, and the output end of the pressure sensor is connected with a display II. And the bottleneck of the buffer container is provided with an adjusting valve which controls the opening and closing of the bottleneck of the buffer container.

The breather valve test fixture device comprises an upper fixture and a lower fixture from top to bottom, the upper fixture is in threaded connection with the lower fixture, a closed cavity is located at the joint of the upper fixture and the lower fixture, an air inlet pipeline vertically penetrates through the lower fixture from bottom to top along the air flow direction and is connected with the closed cavity, an air inlet at one end of the air inlet pipeline is located outside the lower fixture, the other end of the air inlet pipeline is communicated with the closed cavity, an air outlet pipeline is also located in the upper fixture from bottom to top along the air flow direction, one end of the air outlet pipeline is communicated with the closed cavity downwards, and the other end of the air outlet pipeline extends out of the upper fixture upwards and then penetrates through a bottle mouth of a buffer container to enter the buffer container.

The upper clamp and the lower clamp are both made of PVC materials. The air inlet pipeline and the air outlet pipeline are arranged to be flexible pipes, the other end of the air inlet pipeline is connected with the closed cavity in a plugging mode, and one end of the air outlet pipeline is connected with the closed cavity in a plugging mode. The other end of the air inlet pipeline and the plug-in connection position of the closed cavity are provided with a sealing ring I, and the one end of the air outlet pipeline and the plug-in connection position of the closed cavity are provided with a sealing ring II.

The utility model discloses following beneficial effect has: after the technical scheme above is adopted, the utility model discloses an apply the mode of atmospheric pressure, make the expiratory valve bear-249 Pa pressure through the vacuum pump, detect the airflow of revealing of expiratory valve effectively, simple structure detects the convenience moreover, has improved the result of use of breathing machine greatly. The utility model discloses air inlet pipeline and air outlet pipeline set up to the hose, and air inlet pipeline's the other end upwards is connected for the plug between the airtight cavity, and air outlet pipeline's one end is connected for the plug between downwards and the airtight cavity, like this can easy to assemble, easily operation. The utility model discloses go up anchor clamps and lower anchor clamps and all be the PVC material, can improve the plasticity and the hardness of going up anchor clamps and lower anchor clamps like this, be convenient for process, go up anchor clamps and be threaded connection down between the anchor clamps to and the one end that the other end that adopts the air inlet pipeline and the plug junction of airtight cavity were equipped with sealing washer I and the pipeline of giving vent to anger is equipped with sealing washer II with the plug junction of airtight cavity, can fully guarantee the leakproofness of airtight cavity like this. The utility model discloses gas flow sensor is used for detecting the flow size that gets into, gas flow sensor's range is 0 mL/min-100 mL/min, the precision is 1%, the resolution ratio is 0.1 mL/min, and can the express delivery pass through I quick reading data of display, thereby can decide whether need apply atmospheric pressure, pressure sensor can detect the pressure condition that the expiratory valve bore through the atmospheric pressure that detects in the gas outlet pipe way, thereby whether the expiratory valve that can be quick accurate exists the condition of revealing and the gas flow of revealing, pressure sensor's range is-1000 Pa-0 Pa, the precision is 1%, the resolution ratio is 0.1 Pa, so not only can improve the sensitivity that detects, the reinforcing stability that detects, and read conveniently, convenient to use, the system adopts 24V safe voltage power supply, energy-saving, environmental protection and safety.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

In fig. 1, the present invention provides an expiratory valve air tightness detection device, which mainly comprises a vacuum pump 1, a buffer container 2 and an expiratory valve test fixture, wherein a closed chamber 3 is arranged in the expiratory valve test fixture, a breather valve 4 is installed in the closed chamber 3, an air inlet pipeline 5 is arranged on one side of the closed chamber 3, one end of the air inlet pipeline 5 is provided with an air inlet 6, the other end of the air inlet pipeline 5 is communicated with the closed chamber 3, the air inlet 6 is positioned outside the expiratory valve test fixture, an air outlet pipeline 7 is arranged on the other side of the closed chamber 3, one end of the air outlet pipeline 7 is communicated with the closed chamber 3, the other end of the air outlet pipeline 7 sequentially extends out of the expiratory valve test fixture and then passes through the bottleneck of the buffer container 2 to enter the buffer container 2, an air suction pipeline 8 is arranged between the air inlet of the buffer container 2 and the air outlet of the vacuum pump 1, one end of the air outlet pipeline 8 is positioned in the buffer container 2, the other end of the air inlet pipeline 8 is communicated with the air outlet of the vacuum pump 1, the air inlet pipeline 6 of the air inlet pipeline 5 is provided with a gas flow sensor 9, a signal input end of the gas flow sensor 9 is positioned in the air inlet pipeline 5, a signal output end of the buffer container 11, a pressure sensor 11 of the buffer container is connected with a pressure control fixture 11, a pressure control fixture 11 connected with a pressure control fixture 11, a pressure control clamp 11 of the breath test fixture 11, a pressure control clamp 11 and a pressure control clamp 11 connected with a breath pressure control clamp 11, the closed cavity 3 is positioned at the joint of the upper clamp 14 and the lower clamp 15, the air inlet pipeline 5 vertically penetrates through the lower clamp 15 from bottom to top along the airflow direction to be connected with the closed cavity 3, the air inlet 6 at one end of the air inlet pipeline 5 is positioned outside the lower clamp 15, the other end of the air inlet pipeline 5 is communicated with the closed cavity 3, the air outlet pipeline 7 is also positioned in the upper clamp 14 from bottom to top along the airflow direction, one end of the air outlet pipeline (7) is communicated with the closed cavity 3 from bottom to top, the other end of the air outlet pipeline 7 extends out of the upper clamp 14 upwards and then penetrates through the bottle mouth of the buffer container 2 to enter the buffer container 2, go up anchor clamps 14 and lower anchor clamps 15 all be the PVC material, air inlet pipeline 5 and air outlet pipeline 7 set up to the hose, the other end of air inlet pipeline 5 upwards and airtight cavity 3 between be plug-in connection, air outlet pipeline 7's one end downwards and airtight cavity 3 between be plug-in connection, air inlet pipeline 5's the other end and airtight cavity 3's plug-in connection department be equipped with sealing washer I16, air outlet pipeline 7's one end and airtight cavity 3's plug-in connection department be equipped with sealing washer II 17.

The utility model discloses a use method: firstly, gas enters a sealed chamber 3 from an air inlet pipeline 5 to be blown on an expiratory valve 4, the gas is discharged into a buffer container 2 for buffering through an air outlet pipeline 7 after passing through the expiratory valve 4, then the opening and closing size of a bottle opening of the buffer container 2 is controlled through a regulating valve 13 to control the air pressure in the buffer container 2, the capacity of the buffer container 2 is 5L, a vacuum pump 1 is started for vacuumizing, and the air suction rate of the vacuum pump 1 is about 2L/min; the expiratory valve 4 is subjected to a pressure of-249 Pa, so that the leakage flow of the expiratory valve 4 can be detected. The gas flow sensor 9 is used for detecting the size of an entering flow, the measuring range of the gas flow sensor 9 is 0 mL/min-100 mL/min, the precision is 1%, the resolution is 0.1 mL/min, data can be read quickly through the display I10 in an express mode, whether air pressure needs to be applied or not can be determined, the pressure sensor 11 can detect the pressure condition borne by the expiratory valve through detecting the air pressure in the air pipeline 7, whether the leakage condition exists in the expiratory valve 4 or not and the leaked air flow can be detected quickly and accurately, the measuring range of the pressure sensor 11 is-1000 Pa-0 Pa, the precision is 1%, and the resolution is 0.1 Pa.

Claims

1. The utility model provides an expiratory valve gas tightness detection device, characterized by it mainly includes vacuum pump (1), buffer container (2) and expiratory valve test fixture, be equipped with airtight cavity (3) in the expiratory valve test fixture, breather valve (4) are installed in airtight cavity (3), be equipped with air inlet pipeline (5) in one side of airtight cavity (3), the one end of air inlet pipeline (5) sets up to air inlet (6), the other end of air inlet pipeline (5) is linked together with airtight cavity (3), air inlet (6) are located the breather valve test fixture device outside, be equipped with air outlet pipeline (7) at the opposite side of airtight cavity (3), the one end and airtight cavity (3) of air outlet pipeline (7) are linked together, the other end of air outlet pipeline (7) stretches out breather valve test fixture device in proper order and then passes the bottleneck of buffer container (2) and gets into in buffer container (2), be equipped with air extraction pipeline (8) between buffer container (2) and the extraction opening of vacuum pump (1), the one end of air extraction pipeline (8) is located buffer container (2), the other end and the vacuum pump opening of air extraction pipeline (8) is linked together.

2. The device for detecting the airtightness of the expiratory valve according to claim 1, wherein a gas flow sensor (9) is arranged at the gas inlet (6) of the gas inlet pipeline (5), a signal input end of the gas flow sensor (9) is positioned at the gas inlet of the gas inlet pipeline (5), and a signal output end of the gas flow sensor (9) is connected with a display I (10).

3. The device for detecting the airtightness of the expiratory valve according to claim 1, wherein the outlet pipeline (7) is connected with a pressure sensor (11), the pressure sensor (11) is located at a portion between the test fixture device for the expiratory valve and the buffer container (2), and an output end of the pressure sensor (11) is connected with a display II (12).

4. The device for detecting the airtightness of the expiratory valve according to claim 1 or 3, wherein an adjusting valve (13) is arranged at the bottleneck of the buffer container (2), and the adjusting valve (13) controls the opening and closing of the bottleneck of the buffer container (2).

5. The expiratory valve airtightness detection device according to claim 1 or 3, wherein the breather valve test fixture device comprises an upper fixture (14) and a lower fixture (15) from top to bottom, the upper fixture (14) is in threaded connection with the lower fixture (15), the closed chamber (3) is located at the connection position of the upper fixture (14) and the lower fixture (15), the air inlet pipeline (5) vertically penetrates through the lower fixture (15) from bottom to top along the air flow direction and is connected with the closed chamber (3), the air inlet (6) at one end of the air inlet pipeline (5) is located outside the lower fixture (15), the air outlet pipeline (7) is also located in the upper fixture (14) from bottom to top along the air flow direction, one end of the air outlet pipeline (7) is communicated with the closed chamber (3) from bottom to top, and the other end of the air outlet pipeline (7) extends out of the upper fixture (14) upwards and then penetrates through the mouth of the buffer container (2) to enter the buffer container (2).

6. The device for detecting the airtightness of an exhalation valve according to claim 5, wherein the upper clamp (14) and the lower clamp (15) are both made of PVC material.

7. The device for detecting the airtightness of the expiratory valve according to claim 5, wherein the air inlet pipeline (5) and the air outlet pipeline (7) are provided as hoses, the other end of the air inlet pipeline (5) is connected with the closed chamber (3) in a plugging manner, and the other end of the air outlet pipeline (7) is connected with the closed chamber (3) in a plugging manner.

8. The device for detecting the airtightness of the expiratory valve according to claim 7, wherein a sealing ring I (16) is arranged at the plug-in connection position of the other end of the air inlet pipeline (5) and the closed chamber (3), and a sealing ring II is arranged at the plug-in connection position of one end of the air outlet pipeline (7) and the closed chamber (3).