A heat resistance performance test system and method for the air supply pipe of a long tube breathing apparatus

Abstract

The present invention relates to a heat resistance performance test system and method for the air supply pipe of a long tube breathing apparatus, which includes an air compressor, a heating plate, an air supply pipe support mechanism, a water bath, a breathing machine, and a gas quality detection device arranged in sequence. An electric control switch valve is provided at the air outlet of the air compressor, and the electric control switch valve is used to connect to the air inlet end of the air supply pipe. The air inlet end of the breathing machine is used to connect to the air outlet end of the air supply pipe, and the air outlet end of the breathing machine is connected to the gas quality detection device through a collection pipe. The air supply pipe support mechanism includes a first electric control lifting member, and the top of the telescopic part of the first electric control lifting member is fixedly connected with a support member. The support member is used to support the air supply pipe, and the support member can be lifted and lowered under the drive of the first lifting member to realize sending the air supply pipe into and out of the heating plate and the water bath. Using the test system of the present invention improves the test efficiency and reduces the labor intensity.

Description

Technical Field

[0001] The present invention relates to the technical field of quality inspection of protective products, and particularly relates to a heat resistance performance test system and method for the air supply pipe of a long tube breathing apparatus. Background Art

[0002] The statements herein only provide background art related to the present invention and do not necessarily constitute prior art.

[0003] A long tube breathing apparatus is a protective article that is used to isolate the exhalation organs of a wearer's face from the surrounding air and supply breathing air through a long tube, and is commonly used in occasions such as fire fighting and rescue of chemical fires. Some of the long tubes that supply air to the breathing mask claim to have heat resistance performance and should meet the corresponding heat resistance performance test requirements. That is, when the supply pressure claimed by the manufacturer is reached in the air supply pipe, the respiratory protection device is tested on the breathing machine at a flow rate of 25 × 2.0 L / min. A 100-mm section of the air supply pipe is brought into contact with a heating plate maintained at (130 ± 15) °C, and a section of the pipe after that section is immersed in boiling water. After 15 minutes, the air supply pipe is removed from the heating plate and the boiling water, and signs of damage are detected and it is checked whether the quality of the air passing through the pipe is significantly affected. Currently, the test process is all manual operation, with low test quality and efficiency, and a relatively large labor intensity during the test. At present, there is no suitable automatic test device and method for this. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a heat resistance performance test device for the air supply pipe of a long tube breathing apparatus, which improves the working efficiency and test quality.

[0005] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0006] In a first aspect, an embodiment of the present invention provides a heat resistance performance test system for the air supply pipe of a long tube breathing apparatus, including an air compressor, a heating plate, an air supply pipe support mechanism, a water bath, a breathing machine, and a gas quality detection device arranged in sequence. An electric control switch valve is provided at the air outlet of the air compressor, and the electric control switch valve is used to connect to the air inlet end of the air supply pipe. The air inlet end of the breathing machine is used to connect to the air outlet end of the air supply pipe. The air outlet end of the breathing machine is connected to the gas quality detection device through a collection pipe. The air supply pipe support mechanism includes a first electric control lifting member, and the top of the telescopic part of the first electric control lifting member is fixedly connected with a support member. The support member is used to support the air supply pipe, and the support member can be lifted and lowered under the drive of the first lifting member to realize sending the air supply pipe into and out of the heating plate and the water bath.

[0007] Optionally, a pressure detection element is installed on the tank body of the air compressor to detect the internal gas pressure.

[0008] Optionally, the air compressor is provided with a filter for filtering the gas inside its tank.

[0009] Optionally, the support member includes a first horizontal plate. One end of the first horizontal plate is connected to the top of the telescopic part of the first electric control lifting member, and the bottom surface of the other end is provided with a vertical connecting plate perpendicular to it. The bottom end of the vertical connecting plate is fixed with a support rod for supporting the air supply pipe.

[0010] Optionally, the surface of the support rod for supporting the air supply pipe is a convex arc surface.

[0011] Optionally, a second horizontal plate is provided at the middle position of the vertical connecting plate. A first electric control pan-tilt camera is provided on the lower surface of the second horizontal plate. A second electric control lifting member is provided on the bottom surface of the first horizontal support plate. The end of the telescopic part of the second electric control lifting member is connected with a second electric control pan-tilt camera.

[0012] Optionally, a third horizontal plate is provided at the end of the telescopic part of the second electric control lifting member, and a second electric control pan-tilt camera is installed on the upper surface of the third horizontal plate.

[0013] Optionally, the second electric control lifting member adopts a multi-stage electric control lifting member.

[0014] Optionally, a temperature detection element is provided inside the water bath for detecting the water temperature inside it.

[0015] In a second aspect, an embodiment of the present invention provides a method for a long tube breathing apparatus air supply pipe heat resistance performance test system according to the first aspect, including the following steps:

[0016] The electric control switch valve of the air compressor is connected to the intake end of the air supply pipe to be tested, the ventilator is connected to the outlet end of the air supply pipe, the support member supports the air supply pipe, and under the action of the first electric control lifting member, the air supply pipe is kept separated from the heating plate and the water bath;

[0017] Start the air compressor and the ventilator. When the pressure inside the air compressor tank reaches the set value, open the electric control switch valve. The air compressor injects gas with a set pressure into the ventilator through the air supply pipe, and the gas quality detection device detects the air quality discharged from the ventilator in real time;

[0018] The first electric control lifting member drives the support member to descend, so that a part of the air supply pipe on one side of the support member falls onto the heating plate, and a part of the air supply pipe on the other side falls into the water bath with the internal water in a boiling state;

[0019] After maintaining for a set time, the first electric control lifting member drives the support member to rise, and the air supply pipe leaves the heating plate and the water bath, and observe whether there is any damage to the air supply pipe.

[0020] The beneficial effects of the present invention are as follows:

[0021] 1. The test system of the present invention includes an air compressor, a first electrically controlled lifting member, a support member, a heating plate, and a water bath. After the output pressure of the air compressor reaches the target pressure, the first electrically controlled lifting member can drive the air supply pipe to automatically drop onto the heating plate and the water bath through the support member, and after a set time, the air supply pipe can be lifted away from the heating plate and the water bath by the rising of the support member. The entire test process is automated, eliminating the need for manual placement of the air supply pipe onto the heating plate and the water bath, improving work efficiency, reducing labor intensity, and enhancing test quality.

[0022] 2. The test system of the present invention includes a first electrically controlled pan-tilt camera and a second electrically controlled pan-tilt camera, which can collect images of the air supply pipe and observe whether the air supply pipe is damaged using the collected images. There is no need for testers to approach the air supply pipe for observation, reducing the labor intensity of testers and improving test efficiency.

[0023] 3. In the test system of the present invention, the second pan-tilt camera is connected to the telescopic part of the second electrically controlled lifting member, which can avoid the phenomenon of collision interference between the second pan-tilt camera and the ground foundation when the telescopic part of the first electrically controlled lifting member descends.

[0024] 4. In the test system of the present invention, the upper surface of the support rod is an arc surface, which avoids damage to the air supply pipe caused by supporting the air supply pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0026] Figure 1 is the front view of the overall structure of Embodiment 1 of the present invention Figure 1 ;

[0027] Figure 2 is the front view of the overall structure of Embodiment 1 of the present invention Figure 2 ;

[0028] Figure 3 is the top view of the overall structure of Embodiment 1 of the present invention;

[0029] Figure 4 is the present invention Figure 1 Schematic view in the direction of A in;

[0030] Figure 5 is the schematic diagram of the control principle of Embodiment 1 of the present invention;

[0031] Among them, 1. ground foundation, 2. air compressor, 3. filter, 4. air compressor controller, 5. pressure sensor, 6. solenoid valve, 7. air supply pipe, 8. heating plate, 9. heating plate controller, 10. first electric lifting rod, 11. first horizontal plate, 12. bolt, 13. vertical connecting plate, 14. second horizontal plate, 15. first electric control pan-tilt camera, 16. water bath, 17. breathing machine, 18. collection pipe, 19. gas quality detector, 20. PLC controller, 21. water bath controller, 22. support rod, 23. second electric lifting rod, 24. third horizontal plate, 25. second electric control pan-tilt camera, 26. temperature sensor, 27. telescopic part, 28. telescopic part, 29. first servo motor, 30. second servo motor. Detailed implementation manners

[0032] Embodiment 1

[0033] This embodiment provides a test device for the heat resistance performance of the air supply pipe of a long-tube breathing apparatus. As Figures 1 - 5 shown, it includes an air compressor 2, a heating plate 8, an air supply pipe support mechanism, a water bath 16, a breathing machine 17, and a gas quality detection device 19 arranged in sequence.

[0034] The air compressor 2 has a tank body, and the tank body is placed on the ground foundation 1 through feet. The tank body has an air inlet and an air outlet. A filter 3 is arranged at the air inlet for filtering the air entering the tank body. An electric control switch valve is installed at the air outlet. In this embodiment, the electric control switch valve adopts a solenoid valve 6, and the solenoid valve 6 is connected to a control system and is controlled by the control system to work. The air compressor 2 is connected to the control system through an air compressor controller 4 and is controlled by the control system to work.

[0035] The solenoid valve 6 is used to connect to the air inlet end of the air supply pipe 7 to be detected.

[0036] The tank body is also equipped with a pressure detection element. The pressure detection element adopts a pressure sensor 5 for detecting the air pressure in the tank body. The pressure sensor 5 is connected to the control system and can transmit the collected air pressure information to the control system.

[0037] The heating plate 8 can adopt an existing electric heating plate. Along the arrangement direction of each device in this embodiment, the length of the heating part of the heating plate 8 is 100 mm, which meets the requirements of the test experiment.

[0038] The heating plate 8 is connected to a heating plate controller 9, and the heating plate controller 9 is connected to the control system, which can control the temperature of the heating plate 8 to keep it at the test required temperature (130 ± 15) °C.

[0039] The air supply pipe support mechanism includes a first electrically controlled lifting member with a vertical axis. The first electrically controlled lifting member uses a first electric lifting rod 10 connected to the control system. The telescopic part 28 thereof is driven by a first servo motor 29 to perform lifting motion. The first servo motor 29 is connected to the control system and is controlled by the control system to work.

[0040] The first electric lifting rod 10 is fixed to the ground foundation by bolts.

[0041] A support member is fixed to the top end of the telescopic part 28 of the first electric lifting rod 10, and the support member is used to support the air supply pipe.

[0042] In this embodiment, the support member includes a first horizontal plate 11. One end of the first horizontal plate 11 is fixed to the top end of the telescopic part 28 of the first electric lifting rod 10 by bolts 12, and a vertical connecting plate 13 is welded and fixed to the bottom surface of the other end.

[0043] The vertical connecting plate 13 is perpendicular to the first horizontal plate 11. Its top end is welded and fixed to the first horizontal plate 11, and its bottom end is welded and fixed to one end of a support rod 22. The axis of the support rod 22 is horizontally arranged and is used to support the air supply pipe 7.

[0044] In this embodiment, the top surface of the support rod 22, which is the surface for supporting the air supply pipe 7, is an arc surface to avoid damaging the air supply pipe during support. The bottom surface of the support rod 22 is a plane, which is convenient for installing the second electrically controlled lifting member.

[0045] A second horizontal plate 14 is welded and fixed at the middle position of the outer side surface of the vertical connecting plate 13. One end of the second horizontal plate 14 is welded and fixed to the vertical connecting plate 13, and a first electrically controlled pan-tilt camera 15 is installed on the lower surface of the other end. The first electrically controlled pan-tilt camera is connected to the control system and can collect images of the upper part of the air supply pipe and transmit them to the control system. The first electrically controlled pan-tilt camera 15 can use existing equipment.

[0046] A second electrically controlled lifting member is installed on the bottom surface of the support rod 22. The second electrically controlled lifting member uses a second electric lifting rod 23. The second electric lifting rod 23 is a multi-stage electric lifting rod. In this embodiment, the second electric lifting rod 23 uses an existing double-stage electric lifting rod. Its telescopic part 27 has a first-stage telescopic part and a second-stage telescopic part arranged in sequence, and is driven by a second servo motor 30 to work. The second servo motor 30 is connected to the control system and is controlled by the control system to work.

[0047] A third horizontal plate 24 is fixed to the bottom end of the secondary telescopic part of the second electric lifting rod 23 by bolts. One end of the third horizontal plate 24 is connected to the secondary telescopic part of the second electric lifting rod 23, and a second electric control pan-tilt camera 25 is arranged on the upper surface of the other end. The second electric control pan-tilt camera 25 is connected to the control system and can transmit the collected images of the bottom of the air supply pipe to the control system. The second electric control pan-tilt camera 25 can use existing equipment.

[0048] The first electric control pan-tilt camera 15 and the second electric control pan-tilt camera 25 can collect images of the air supply pipe, and use the collected images to observe whether the air supply pipe 7 is damaged, without the need for testers to approach the air supply pipe for observation, reducing the labor intensity of testers and improving the test efficiency.

[0049] Through the setting of the second electric lifting rod 23, it can perform a contraction movement when the first electric lifting rod 10 descends, so that the second electric control pan-tilt camera 25 and the third horizontal plate 24 will not collide and be damaged with the ground foundation 1.

[0050] The water bath 16 can use existing equipment. It is placed on the ground foundation 1, and its specific structure will not be described in detail here. A temperature detection element is installed inside it. The temperature detection element uses a temperature sensor 26 to detect the temperature of the water in the water bath. The temperature detection element and the water bath 16 are both connected to the control system through the water bath controller 21. The water temperature data collected by the temperature sensor 26 can be transmitted to the control system, and the control system can control the operation of the water bath 16.

[0051] The ventilator 17 can use existing equipment. It is placed on the ground foundation 1, and its specific structure will not be described in detail here.

[0052] The air outlet end of the ventilator 17 is connected to the gas quality detection device through a collection pipe 18. The gas quality detection device is used to detect the gas quality discharged by the ventilator 17. The gas quality detection device can use an existing gas quality detector 19, and its specific structure will not be described in detail here.

[0053] The gas quality detector 19 is connected to the control system and can transmit the detected air quality data to the control system.

[0054] In this embodiment, the control system uses a PLC controller 20. The PLC controller 20 is connected to the air compressor 2, the heating plate 8, the water bath 16, the servo motor, the ventilator 17, the gas quality detector 19 and each sensor by wire or wirelessly to control the automation of the entire test process.

[0055] The PLC controller 20 is connected to the monitoring platform, capable of displaying the detected data on the display screen of the monitoring platform. Meanwhile, the experimenter can send instructions to the PLC controller through the display screen of the monitoring platform to control the operation of each device.

[0056] Embodiment 2

[0057] This embodiment provides a method for the heat resistance performance test device of the air supply pipe of the long tube breathing apparatus described in Embodiment 1, including the following steps:

[0058] Step 1: As Figure 1 shown, close the solenoid valve 6 of the air compressor 2, connect the intake end of the air supply pipe 7 to be tested to the solenoid valve 6, connect the outlet end of the air supply pipe 7 to the intake end of the ventilator 17, and the support rod 22 supports the middle position of the air supply pipe 7. The PLC controller 20 controls the first electric lifting rod 10 to work, lift the air supply pipe, so that the air supply pipe is separated from the heating plate and the water bath in the initial state.

[0059] The control system controls the heating plate 8 and the water bath 16 to work, so that the temperature of the heating plate 8 is heated to (130 ± 15) °C, and the water in the water bath 16 is heated to the boiling state.

[0060] Step 2: Observe the value of the pressure sensor 5 of the air compressor 2 in real time. When the pressure value detected by the pressure sensor 5 reaches the set value, the PLC controller controls the solenoid valve 6 to open, and the air compressor 2 injects air with the set pressure value into the air supply pipe 7, where the set value is the maximum design pressure provided by the air supply pipe manufacturer. Start the ventilator 17, and the ventilator 17 works at a breathing frequency of 25 times / min and a breathing flow rate of 2.0 L / time. Turn on the gas quality detector 19, and use the gas quality detector 19 to detect the gas quality discharged by the ventilator 17 in real time.

[0061] Step 3: As Figure 2 shown, the PLC controller 20 controls the telescopic part 28 of the first electric lifting rod 10 to contract, and at the same time controls the telescopic part 27 of the second electric lifting rod 23 to contract. The support rod 22 drops, so that 100 mm of the pipe section in the air supply pipe 7 on the front side of the air supply pipe support mechanism falls on the heating part of the heating plate 8, and the part of the air supply pipe 7 on the rear side of the air supply pipe support mechanism falls into the boiling water in the water bath 16, and this part of the pipe section is immersed in the boiling water.

[0062] There is a timing module in the PLC controller 20. At this time, the timing module in the PLC controller 20 starts timing. After reaching the set time, the telescopic parts of the first electric lifting rod 10 and the second electric lifting rod 23 extend, and the support rod rises, driving the air supply pipe 7 away from the heating plate 8 and the water bath 16.

[0063] The first electronically controlled pan-tilt camera 15 and the second electronically controlled pan-tilt camera 25 respectively collect images of the upper and lower parts of the air supply pipe 7 and transmit them to the control system. The experimenter can observe whether there are any signs of damage to the pipe section of the air supply pipe 7 that has just left the contact heating plate 8 and the water bath 16 through the display screen of the monitoring platform.

[0064] The gas quality detector 19 performs real-time detection on the air quality sent into the air supply pipe through the ventilator 17 during the process of the air supply pipe contacting the heating plate and being immersed in the water bath and 15 minutes after leaving, and observes whether the air quality is significantly affected.

[0065] The experimenter judges whether the air supply pipe 7 meets the acoustic symmetry performance, whether there is any damage, and whether the air quality is affected during the heat resistance test based on the observed images and the data detected by the gas quality detector 19.

[0066] With the test device of this embodiment, the whole process is automated without manual operation, which improves work efficiency, reduces labor intensity, and improves test quality.

[0067] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A heat resistance performance test system for the air supply pipe of a long tube breathing apparatus, characterized in that, It includes an air compressor, a heating plate, an air delivery pipe support mechanism, a water bath, a ventilator, and a gas quality detection device arranged in sequence. An electric control switch valve is provided at the air outlet of the air compressor, and the electric control switch valve is used to connect to the inlet end of the air delivery pipe. The inlet end of the ventilator is used to connect to the outlet end of the air delivery pipe. The outlet end of the ventilator is connected to the gas quality detection device through a collection pipe. The air delivery pipe support mechanism includes a first electric control lifting member, and the top end of the telescopic part of the first electric control lifting member is fixedly connected with a support member. The support member is used to support the air delivery pipe, and the support member can be lifted and lowered under the drive of the first lifting member to realize sending the air delivery pipe into and out of the heating plate and the water bath. The support member includes a first horizontal plate. One end of the first horizontal plate is connected to the top end of the telescopic part of the first electric control lifting member, and a vertical connecting plate perpendicular to it is provided on the bottom surface of the other end. A support rod for supporting the air delivery pipe is fixed at the bottom end of the vertical connecting plate. A second horizontal plate is provided at the middle position of the vertical connecting plate. A first electric control pan-tilt camera is provided on the lower surface of the second horizontal plate, which can collect images of the upper part of the air delivery pipe. A second electric control lifting member is provided on the bottom surface of the first horizontal support plate, and the end of the telescopic part of the second electric control lifting member is connected with a second electric control pan-tilt camera. A third horizontal plate is provided at the end of the telescopic part of the second electric control lifting member, and a second electric control pan-tilt camera is installed on the upper surface of the third horizontal plate, which can collect images of the bottom of the air delivery pipe.

2. The heat resistance performance test system for the air supply pipe of a long tube breathing apparatus according to claim 1, wherein A pressure detection element is installed on the tank body of the air compressor to detect the internal gas pressure.

3. The heat resistance test system for the air supply pipe of a long tube breathing apparatus according to claim 1, characterized in that, The air compressor is provided with a filter for filtering the gas inside its tank body.

4. A heat resistance performance test system for the air supply pipe of a long tube breathing apparatus according to claim 1, characterized in that The surface of the support rod for supporting the air delivery pipe is a convex arc surface.

5. A heat resistance performance test system for the air supply pipe of a long tube breathing apparatus according to claim 1, characterized in that The second electric control lifting member adopts a multi-stage electric control lifting member.

6. The heat resistance test system for the air supply pipe of a long tube breathing apparatus according to claim 1, wherein, A temperature detection element is arranged inside the water bath to detect the water temperature inside it.

7. A method for a heat resistance performance test device of the air supply pipe of a long tube breathing apparatus according to any one of claims 1-6, characterized in that, It includes the following steps: The electric control switch valve of the air compressor is connected to the inlet end of the air delivery pipe to be tested, the ventilator is connected to the outlet end of the air delivery pipe, the support member supports the air delivery pipe, and under the action of the first electric control lifting member, the air delivery pipe is kept separated from the heating plate and the water bath. Start the air compressor and the ventilator. When the pressure in the air compressor tank reaches the set value, open the electric control switch valve. The air compressor injects gas with a set pressure into the ventilator through the air delivery pipe, and the gas quality detection device detects the air quality discharged from the ventilator in real time. The first electric control lifting member drives the support member to descend, so that a part of the air delivery pipe on one side of the support member falls onto the heating plate, and a part of the air delivery pipe on the other side falls into the water bath with the internal water in a boiling state. After maintaining for the set time, the first electric control lifting member drives the support member to rise, and the air delivery pipe leaves the heating plate and the water bath, and observe whether there is any damage to the air delivery pipe.

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