Detection system of compressed air self-rescue device for mines

Abstract

The present invention discloses a detection system for a compressed air self-rescue device for use in mines, comprising a gas source control unit, a compressed air self-rescue device detection unit and a data processing unit; the gas source control unit is used to adjust the test gas pressure; the compressed air self-rescue device detection unit, whose input port is connected to the gas source control unit output port, is used to detect the gas flow and gas pressure of the compressed air self-rescue device; the data processing unit, whose signal input end is connected to the signal output end of the compressed air self-rescue device, is used to receive and save the gas flow and gas pressure. The detection system for a compressed air self-rescue device for use in mines of the present invention can more accurately measure the gas flow and gas pressure of the compressed air self-rescue device, and can detect various types of compressed air self-rescue devices individually or simultaneously, and has a wide range of applications and simple operation.

Description

Technical Field

[0001] The invention relates to the field of safety technology, and in particular to a detection system for a compressed air self-rescue device for mines. Background Art

[0002] In order to ensure the safety of workers working underground in coal mines, my country requires coal mines and non-coal mines to install compressed air self-rescue systems. The mine compressed air self-rescue device, which serves as the terminal of the compressed air self-rescue system, is a device connected to the mine compressed air pipeline with the functions of filtering, reducing pressure, reducing noise, and adjusting air volume. The device can provide users with fresh air for breathing in an emergency, ensuring that the refugee miners are protected from toxic or asphyxiating gases when disasters occur underground.

[0003] Mine compressed air self-rescue devices have been widely used underground in coal mines. In addition to bag-type compressed air self-rescue devices, some companies have developed mask-type compressed air self-rescue devices. The structure, performance and usage of mask-type compressed air self-rescue devices are very different from those of bag-type compressed air self-rescue devices, and there are currently no performance requirements and test method standards for mask-type compressed air self-rescue devices. At present, the air supply performance test of traditional bag-type compressed air self-rescue devices is carried out in accordance with the MT 390-1995 "Technical Conditions for Mine Compressed Air Self-rescue Devices" standard, but this standard is only applicable to bag-type compressed air self-rescue devices due to its long age. There are no technical indicators and test methods for mask-type compressed air self-rescue devices in the relevant standards. The test methods specified in the standards are no longer applicable to new product testing, and there are no implementation standards and inspection methods for the air supply performance of mask-type compressed air self-rescue devices.

[0004] The utility model patent with authorization announcement number 201874611U (application number 201020643711.8) has designed a set of mine compressed air self-rescue device inspection equipment according to the MT 390-1995 "Technical Conditions for Mine Compressed Air Self-rescue Devices" standard. This equipment is only suitable for bag-type compressed air self-rescue devices. In actual use, due to the influence of gas supply pressure stability, airflow resistance, etc., the gas flow value has the defect of fluctuating and insufficient stability; in addition, since the air pressure value and flow value cannot be read at the same time, the read flow value will be out of sync with the gas source pressure value, resulting in a large test error.

[0005] Therefore, in order to solve the above problems, a detection system for a compressed air self-rescue device for mines is needed, which can more accurately measure the gas flow and gas pressure of the compressed air self-rescue device, and can detect various types of compressed air self-rescue devices individually or simultaneously, with a wide range of applications and simple operation. Summary of the invention

[0006] In view of this, the purpose of the present invention is to overcome the defects in the prior art and provide a detection system for a compressed air self-rescue device for mines, which can more accurately measure the gas flow and gas pressure of the compressed air self-rescue device, and can detect various types of compressed air self-rescue devices individually or simultaneously, with a wide range of applications and simple operation.

[0007] The detection system of the compressed air self-rescue device for mines of the present invention comprises an air source control unit, a compressed air self-rescue device detection unit and a data processing unit;

[0008] The gas source control unit has an input port for inputting test gas to adjust the test gas pressure;

[0009] The compressed air self-rescue device detection unit has a first detection channel for detecting the mask-type compressed air self-rescue device and a second detection channel for detecting the bag-type compressed air self-rescue device. The input ports of the two detection channels are both connected to the output port of the gas source control unit. The compressed air self-rescue device detection unit is used to detect the gas flow and / or gas pressure of the mask-type compressed air self-rescue device and the bag-type compressed air self-rescue device;

[0010] The data processing unit has a signal input end connected to the detection signal output end of the compressed air self-rescue device detection unit, and is used to receive and process gas flow and gas pressure signals, and save the processed signals.

[0011] Furthermore, the gas source control unit includes a pressure reducing valve, a pressure gauge I and a flow meter I; the test gas is input into the input port of the pressure reducing valve, the input port of the pressure reducing valve is provided with a ball valve I, the output port of the pressure reducing valve is connected to the input port of the pressure gauge I, the output port of the pressure gauge I is connected to the input port of the flow meter I, the output port of the flow meter I is connected to the input port of the first detection channel and the input port of the second detection channel, and the signal output end of the pressure gauge I is connected to the signal output end of the flow meter I and the signal input end of the data processing unit.

[0012] Furthermore, the first detection channel includes a gas flow detection device I and a gas pressure detection device; the input port of the mask-type compressed air self-rescue device is connected with the output port of the gas source control unit, and a ball valve II is provided on the pipeline connecting the mask-type compressed air self-rescue device and the gas source control unit; the output port of the mask-type compressed air self-rescue device is successively connected with the input port of the gas flow detection device I and the input port of the gas pressure detection device, and the signal output end of the gas flow detection device I and the signal output end of the gas pressure detection device are respectively connected with the signal input end of the data processing unit.

[0013] Furthermore, the gas flow detection device I includes a flow stabilizer I for stabilizing the gas flow and a flow meter II for measuring the gas flow of the mask-type compressed air self-rescue device; the input port of the flow stabilizer I is connected to the output port of the mask-type compressed air self-rescue device, and a ball valve III is provided on the pipeline connecting the flow stabilizer I and the mask-type compressed air self-rescue device; the output port of the flow stabilizer I is connected to the input port of the flow meter II, and the signal output end of the flow meter II is connected to the signal input end of the data processing unit.

[0014] Furthermore, the gas pressure detection device includes a pressure gauge II for measuring the pressure difference between the inside and outside of the mask of the mask-type compressed air self-rescue device; the input port of the pressure gauge II is connected to the output port of the mask-type compressed air self-rescue device, and the signal output end of the pressure gauge II is connected to the signal input end of the data processing unit.

[0015] Furthermore, the second detection channel includes a sealed cavity and a gas flow detection device II; the bag-type compressed air self-rescue device is arranged in the sealed cavity, the input port of the bag-type compressed air self-rescue device is connected with the output port of the gas source control unit, and a ball valve IV is provided on the pipeline connecting the bag-type compressed air self-rescue device and the gas source control unit; the output port of the sealed cavity is connected with the input port of the gas flow detection device II, and the signal output end of the gas flow detection device II is connected with the signal input end of the data processing unit.

[0016] Furthermore, the gas flow detection device II includes a flow stabilizer II for stabilizing the gas flow and a flowmeter III for measuring the gas flow of the bag-type compressed air self-rescue device; the input port of the flow stabilizer II is connected with the output port of the sealed chamber, and a ball valve V is provided on the pipeline connecting the flow stabilizer II and the sealed chamber, the output port of the flow stabilizer II is connected with the input port of the flowmeter III, and the signal output end of the flowmeter III is connected with the signal input end of the data processing unit.

[0017] Furthermore, it also includes a gas flow calibration unit, which is used to calibrate the gas flow measurement values ​​of the mask-type compressed air self-rescue device and the bag-type compressed air self-rescue device; the input port of the gas flow calibration unit is connected to the output port of the mask-type compressed air self-rescue device and the output port of the bag-type compressed air self-rescue device.

[0018] Furthermore, the gas flow calibration unit includes a flow stabilizer III and a flow meter IV, the first input port of the flow stabilizer III is connected to the output port of the mask-type compressed air self-rescue device, and a ball valve VI is provided on the pipeline connecting the flow stabilizer III and the mask-type compressed air self-rescue device; the second input port of the flow stabilizer III is connected to the output port of the bag-type compressed air self-rescue device, and a ball valve VII is provided on the pipeline connecting the flow stabilizer III and the bag-type compressed air self-rescue device; the output port of the flow stabilizer III is connected to the input port of the flow meter IV.

[0019] The beneficial effects of the present invention are as follows: a detection system for a compressed air self-rescue device for mines disclosed by the present invention can accurately detect the gas flow values ​​and gas pressure values ​​of a variety of different compressed air self-rescue devices individually or simultaneously by injecting gas into the compressed air self-rescue device, and then judge whether the compressed air self-rescue device is compliant based on the gas flow value and the gas pressure value. It has a wide range of applications and is simple to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0021] Figure 1 It is a schematic diagram of the system structure of the present invention;

[0022] Among them, 1 is a pipeline; 2-1 is a ball valve; 3 is a pressure reducing valve; 4-1 is a pressure gauge; 5-1 is a vortex flowmeter; 2-2 is a ball valve; 6 is a quick connector; 7 is a mask-type compressed air self-rescue device; 11 is a human head mold; 12 is a straight pipe; 13 is a quick connector; 4-2 is a pressure gauge; 14 is a quick connector; 2-6 is a ball valve; 15-1 is a flow stabilizer; 5-2 is a vortex flowmeter; 2-4 is a ball valve; 15-2 is a flow stabilizer; 16 is a rotor flowmeter; 2-3 is a ball valve; 8 is a bag-type compressed air self-rescue device; 9 is a spring hose; 10 is a sealing chamber; 2-5 is a ball valve; 2-7 is a ball valve; 15-3 is a flow stabilizer; 5-3 is a vortex flowmeter; 17 is a data acquisition card; 18 is a data processing device. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings, as shown in the drawings:

[0024] The detection system of the compressed air self-rescue device for mines of the present invention comprises an air source control unit, a compressed air self-rescue device detection unit and a data processing unit;

[0025] The gas source control unit has an input port for inputting test gas to adjust the test gas pressure;

[0026] The compressed air self-rescue device detection unit has a first detection channel for detecting the mask-type compressed air self-rescue device 7 and a second detection channel for detecting the bag-type compressed air self-rescue device 8. The input ports of the two detection channels are both connected to the output ports of the gas source control unit. The compressed air self-rescue device detection unit is used to detect the gas flow and / or gas pressure of the mask-type compressed air self-rescue device and the bag-type compressed air self-rescue device;

[0027] The data processing unit has a signal input end connected to the detection signal output end of the compressed air self-rescue device detection unit, and is used to receive and process gas flow and gas pressure signals, and save the processed signals.

[0028] Through the above structure, the gas flow and gas pressure of the compressed air self-rescue device can be truly and objectively detected and simulated and verified. It has wide applicability and strong technical repeatability, and provides technical support for optimizing or improving the compressed air self-rescue device.

[0029] In this embodiment, the gas source control unit includes a pressure reducing valve 3, a pressure gauge 4-1 and a vortex flowmeter 5-1; the test gas is input into the input port of the pressure reducing valve 3, and the input port of the pressure reducing valve 3 is provided with a ball valve 2-1, the output port of the pressure reducing valve 3 is connected with the input port of the pressure gauge 4-1, the output port of the pressure gauge 4-1 is connected with the input port of the vortex flowmeter 5-1, the output port of the vortex flowmeter 5-1 is connected with the input port of the first detection channel and the input port of the second detection channel, and the signal output end of the pressure gauge 4-1 and the signal output end of the vortex flowmeter 5-1 are connected to the signal input end of the data processing unit.

[0030] The vortex flowmeter 5-1 is used to cooperate with the pressure gauge 4-1, specifically: when the pressure indication of the pressure gauge 4-1 increases, the flow indication of the vortex flowmeter 5-1 will also increase, and vice versa; if the indication of the pressure gauge 4-1 and the indication of the vortex flowmeter 5-1 do not increase or decrease at the same time, the pressure gauge 4-1 and the vortex flowmeter 5-1 need to be replaced or repaired. The pressure reducing valve 3 is a throttling element with variable local resistance, which is used to adjust the size of the gas source pressure, adopts the existing technology, and will not be repeated here.

[0031] In this embodiment, the first detection channel includes a gas flow detection device I and a gas pressure detection device; the input port of the mask-type compressed air self-rescue device 7 is connected with the output port of the gas source control unit, and a ball valve 2-2 is provided on the pipeline connecting the mask-type compressed air self-rescue device 7 and the gas source control unit, and the output port of the mask-type compressed air self-rescue device 7 is successively connected with the input port of the gas flow detection device I and the input port of the gas pressure detection device, and the signal output end of the gas flow detection device I and the signal output end of the gas pressure detection device are respectively connected to the signal input end of the data processing unit.

[0032] In this embodiment, the gas flow detection device I includes a flow stabilizer 15-1 for stabilizing the gas flow and a vortex flowmeter 5-2 for measuring the gas flow of the mask-type compressed air self-rescue device 7; the input port of the flow stabilizer 15-1 is connected to the output port of the mask-type compressed air self-rescue device 7, and a ball valve 2-6 is provided on the pipeline connecting the flow stabilizer 15-1 and the mask-type compressed air self-rescue device 7; the output port of the flow stabilizer 15-1 is connected to the input port of the vortex flowmeter 5-2, and the signal output end of the vortex flowmeter 5-2 is connected to the signal input end of the data processing unit.

[0033] In this embodiment, the gas pressure detection device includes a pressure gauge 4-2 for measuring the pressure difference between the inside and outside of the mask of the mask-type compressed air self-rescue device 7. The input port of the pressure gauge 4-2 is connected to the output port of the mask-type compressed air self-rescue device 7 through a straight pipe 12, and the signal output end of the pressure gauge 4-2 is connected to the signal input end of the data processing unit.

[0034] In the present embodiment, the second detection channel includes a sealed chamber 10 and a gas flow detection device II, the bag-type compressed air self-rescue device 8 is arranged in the sealed chamber 10, when the gas flow of the bag-type compressed air self-rescue device 8 is detected, the gas flowing out of the bag-type compressed air self-rescue device 8 will enter the sealed chamber 10, and finally flow out from the output port of the sealed chamber 10; a sealed door is arranged on the side of the sealed chamber 10, and the bag-type compressed air self-rescue device 8 is taken and placed by opening and closing the sealed door; the input port of the bag-type compressed air self-rescue device 8 is connected with the output port of the air source control unit, and a ball valve 2-3 is arranged on the pipeline connecting the bag-type compressed air self-rescue device 8 and the air source control unit, the output port of the sealed chamber 10 is connected with the input port of the gas flow detection device II, and the signal output end of the gas flow detection device II is connected with the signal input end of the data processing unit.

[0035] In this embodiment, the gas flow detection device II includes a flow stabilizer 15-3 for stabilizing the gas flow and a vortex flowmeter 5-3 for measuring the gas flow of the bag-type compressed air self-rescue device. The input port of the flow stabilizer 15-3 is connected to the output port of the sealed chamber 10, and a ball valve 2-7 is provided on the pipeline connecting the flow stabilizer 15-3 and the sealed chamber 10. The output port of the flow stabilizer 15-3 is connected to the input port of the vortex flowmeter 5-3, and the signal output end of the vortex flowmeter 5-3 is connected to the signal input end of the data processing unit.

[0036] In this embodiment, the detection system of the compressed air self-rescue device for mines also includes a gas flow calibration unit, which is used to calibrate the gas flow measurement values ​​of the mask-type compressed air self-rescue device 7 and the bag-type compressed air self-rescue device 8; the input port of the gas flow calibration unit is connected to the output port of the mask-type compressed air self-rescue device 7 and the output port of the bag-type compressed air self-rescue device 8.

[0037] In this embodiment, the gas flow calibration unit includes a flow stabilizer 15-2 and a rotor flowmeter 16, the first input port of the flow stabilizer 15-2 is connected to the output port of the mask-type compressed air self-rescue device 7, and a ball valve 2-4 is provided on the pipeline connecting the flow stabilizer 15-2 and the mask-type compressed air self-rescue device 7, the second input port of the flow stabilizer 15-2 is connected to the output port of the sealed chamber 10, and a ball valve 2-5 is provided on the pipeline connecting the flow stabilizer 15-2 and the sealed chamber 10, and the output port of the flow stabilizer 15-2 is connected to the input port of the rotor flowmeter 16.

[0038] In this embodiment, the data processing unit includes a data acquisition card 17 and a data processing device 18; the input end of the data acquisition card 17 is connected to the signal output end of the pressure gauge 4-1, the signal output end of the pressure gauge 4-2, the signal output end of the flow meter 5-1, the signal output end of the flow meter 5-2 and the signal output end of the flow meter 5-3, and the output end of the data acquisition card 17 is connected to the input end of the data processing device 18; the data acquisition card 17 is used to automatically collect and upload the analog or digital signal of the equipment being tested, and the data acquisition card 17 can collect gas pressure and gas flow at the same time, ensuring the timeliness and synchronization of data collection; the data acquisition card 17 adopts the existing technology and will not be repeated here; the data processing device 18 is used to display and save parameters such as gas flow and gas pressure of the compressed air self-rescue device, and the data processing device 18 includes a computer and a software system, wherein the software system has the functions of reading, displaying, storing, querying data and generating reports.

[0039] It should be noted that, in order to ensure the accuracy of the measured gas flow, the entire detection system uses a flow stabilizer, which adopts the existing technology and has the function of stabilizing the gas flow.

[0040] The specific method of the present invention is further described below:

[0041] S1. Determine whether the sealing performance of the compressed air self-rescue device and the compressed air self-rescue device detection unit meets the requirements. If so, proceed to step S2; if not, investigate the cause of the sealing failure;

[0042] S2. Inject gas into the detection unit of the compressed air self-rescue device to detect the compressed air self-rescue device, measure and collect detection parameters; the detection parameters include gas flow and gas pressure.

[0043] In this embodiment, the mask-type compressed air self-rescue device 7 is tested:

[0044] In step S1, judging whether the sealing performance of the mask-type compressed air self-rescue device and the first detection channel of the compressed air self-rescue device detection unit meets the requirements specifically includes:

[0045] Connect the input port of the mask-type compressed air self-rescue device 7 to the output port of the vortex flowmeter 5-1 through the quick connector 6, remove the mask corresponding to the measured pipeline in the mask-type compressed air self-rescue device 7, and turn the ball valve 2-6, the ventilation switch corresponding to the measured pipeline in the mask-type compressed air self-rescue device 7, the ball valve 2-2 and the ball valve 2-1 to the fully open state, and turn the ball valve 2-3 and the ball valve 2-4 to the closed state;

[0046] Set the gas source pressure range to 0.3MPa~0.7MPa, adjust the pressure reducing valve 3 so that the gas source pressure is the maximum value of 0.7Mpa in the range, so that the gas can fully enter the entire pipeline, ensuring the reliability of the sealing inspection. Check whether there is a gas leakage sound in the tested pipeline of the mask-type compressed air self-rescue device 7 and the gas flow detection device I connected to the tested pipeline of the mask-type compressed air self-rescue device 7, and observe whether the reading of the pressure gauge 4-1 changes; if there is no gas leakage sound, and the reading of the pressure gauge 4-1 is stable, then the tested pipeline of the compressed air self-rescue device and the gas flow detection device I are well sealed; similarly, perform a sealing inspection on other pipelines of the mask-type compressed air self-rescue device 7. If there is no gas leakage sound each time the inspection is carried out, and the reading of the pressure gauge 4-1 is stable each time the inspection is carried out, then go to step S2, otherwise the sealing fails, and the cause of the sealing failure is investigated. Finally, turn off the ventilation switches corresponding to all tested pipelines of the mask-type compressed air self-rescue device 7.

[0047] Step S2 also includes calibrating the gas flow measurement value of the mask-type compressed air self-rescue device, specifically including:

[0048] The output port of the air outlet pipe of the measured pipeline in the mask-type compressed air self-rescue device 7 is connected to the input port of the vortex flowmeter 5-2 and the input port of the rotor flowmeter 16 through the quick connector 14, and the ventilation switch corresponding to the measured pipeline in the mask-type compressed air self-rescue device 7 is turned on, and the gas flow value Q1 of the flowmeter is read after the reading of the vortex flowmeter 5-2 is stable; then the ball valve 2-6 is closed, and the ball valve 2-4 is slowly opened when the ball valve 2-5 is closed, and the gas flow value Q2 of the flowmeter is read after the reading of the rotor flowmeter 16 is stable, and finally the ball valve 2-4 is closed and the ball valve 2-6 is opened. If the absolute value of the difference between the flowmeter values ​​Q1 and Q2 is less than 2% of the average value of the two, the gas flow measurement value of the mask-type compressed air self-rescue device meets the detection requirements, otherwise it does not meet the detection requirements, and it is necessary to check and analyze to find the reason. It should be noted that the main purpose of calibrating the flow measurement value is to determine whether the measurement function of the vortex flowmeter 5-2 is normal.

[0049] In step S2, in this embodiment, measuring and collecting the pressure difference between the mask and the outside of the mask of the mask-type compressed air self-rescue device specifically includes:

[0050] Adjust a pressure valve of the mask-type compressed air self-rescue device so that the gas pressure input to the mask corresponding to the pressure valve is 0.3Mpa, wear the mask on the human head mold 11, and ensure that the mask fits the human head mold 11 without leakage, open the ventilation switch corresponding to the mask, and insert one end of the straight tube 12 into the sealed space between the human head mold 11 and the mask, wherein the insertion depth of one end of the straight tube 12 is about 5mm, thereby ensuring that the sealing of the sealed space is not affected after the straight tube 12 is inserted; the other end of the straight tube 12 is connected to the input port of the pressure gauge 4-2 through the quick connector 13; the data acquisition card 17 receives the gas pressure value sent by the pressure gauge 4-2, and sends the received pressure value to the data processing device 18 for reading and saving; finally, close the ventilation switch corresponding to the measured mask, and remove the human head mold 11 and the straight tube 12 if necessary; similarly, measure and collect the gas pressure of other masks in the mask-type compressed air self-rescue device, which will not be repeated here.

[0051] Among them, the gas pressure value of the pressure gauge 4-2 is the pressure difference between the inside and outside of the mask. The pressure difference between the inside and outside of each mask is read three times, and the minimum value of the three values ​​is taken as the final pressure difference between the inside and outside of the mask; the pressure difference between the inside and outside of the mask of the mask-type compressed air self-rescue device is the difference between the pressure inside the mask and the pressure outside the mask, and the difference is at least 300Pa, thereby ensuring that the external environmental gas of the mask (harmful gas in a disaster environment) will not enter the mask, ensuring the personal safety of the wearer.

[0052] In step S2, in this embodiment, measuring and collecting the gas flow of the mask-type compressed air self-rescue device specifically includes:

[0053] Open the ventilation switch corresponding to any mask in the mask-type compressed air self-rescue device 7, then remove the mask, and connect the outlet of the air outlet pipe after removing the mask to the input port of the vortex flowmeter 5-2 through the quick connector 14. The pipeline connecting the air outlet pipe and the vortex flowmeter 5-2 is provided with a flow stabilizer 15-1, and then fully open the ball valve 2-6; the data acquisition card 17 simultaneously receives the gas flow value Q3 of the vortex flowmeter 5-2 and the gas pressure value P1 of the pressure gauge 4-1, and sends the received data to the data processing device 18 for reading and saving; similarly, the gas flow of other mask outlet pipelines in the mask-type compressed air self-rescue device is measured and collected, which will not be repeated here. It should be noted that during this measurement process, the pressure value set by the pressure valve corresponding to the measured pipeline of the mask-type compressed air self-rescue device is consistent with the pressure value P1.

[0054] By simultaneously receiving and reading the above data values, it is ensured that the collected gas flow value Q3 is the measured value under the set gas pressure value P1, thereby ensuring the accuracy of the collected gas flow value Q3. The gas pressure values ​​P1 are adjusted to 0.3 MPa, 0.5 MPa and 0.7 MPa by adjusting the pressure reducing valve 3.

[0055] When the resistance of the manufactured mask-type compressed air self-rescue device is too large or there are design defects, the gas flow rate flowing out through the mask pipeline may be too low to ensure the pressure difference inside and outside the mask. The flow rate may also be too large, causing discomfort to the wearer. The gas flow rate value Q3 should be within the range of 50L / min to 100L / min.

[0056] In this embodiment, the bag-type compressed air self-rescue device is tested:

[0057] In step S1, judging whether the sealing performance of the bag-type compressed air self-rescue device and the second detection channel of the compressed air self-rescue device detection unit meets the requirements specifically includes:

[0058] Sequentially make the ball valve 2-7, the ball valve 2-3 and the ball valve 2-1 fully open, and make the ball valve 2-2 and the ball valve 2-5 closed;

[0059] Adjust the pressure reducing valve 3 so that the gas source pressure is 0.7Mpa, and check whether there is any gas leakage sound in the bag-type compressed air self-rescue device 8 and the gas flow detection device II connected to the bag-type compressed air self-rescue device 8, and observe whether the reading of the pressure gauge 4-1 changes; if there is no gas leakage sound, and the reading of the pressure gauge 4-1 is stable, the second detection channel of the bag-type compressed air self-rescue device and the compressed air self-rescue device detection unit is well sealed, and enter step S2, otherwise the seal fails, and the cause of the seal failure is investigated. It should be noted that in order to facilitate the detection, the cape of the bag-type compressed air self-rescue device can be removed before the detection, and the bag-type compressed air self-rescue device without a cape does not need to be treated in this way.

[0060] Step S2 also includes calibrating the gas flow measurement value of the bag-type compressed air self-rescue device, specifically including:

[0061] Check the reading of vortex flowmeter 5-3, and read the gas flow value Q4 of flowmeter 5-3 after the reading is stable; then close ball valve 2-7, make sure to close ball valve 2-4, slowly open ball valve 2-5, and read the gas flow value Q5 of flowmeter 16 after the reading of rotor flowmeter 16 is stable, and finally close ball valve 2-5 and open ball valve 2-7. If the absolute value of the difference between the flowmeter values ​​Q4 and Q5 is less than 2% of the average value of the two, the gas flow measurement value of the bag-type compressed air self-rescue device meets the test requirements, otherwise it does not meet the test requirements, and it is necessary to check and analyze to find the cause.

[0062] In step S2, in this embodiment, measuring and collecting the gas flow of the bag-type compressed air self-rescue device specifically includes:

[0063] The data acquisition card 17 simultaneously receives the gas flow value Q6 sent by the vortex flowmeter 5-3 and the gas pressure value P2 sent by the pressure meter 4-1, and sends the received data to the data processing device 18 for reading and storage;

[0064] By simultaneously receiving and reading the above data values, it is ensured that the collected gas flow value Q6 is the measured value under the set gas pressure value P2, thereby ensuring the accuracy of the collected gas flow value Q6. The gas pressure values ​​P2 are adjusted to 0.3 MPa, 0.5 MPa and 0.7 MPa respectively by adjusting the pressure reducing valve 3.

[0065] When there are design defects in the manufactured bag-type compressed air self-rescue device, the gas flow rate in the bag-type compressed air self-rescue device may be too low to provide sufficient oxygen supply to the user, or the flow rate may be too large to cause discomfort to the user. In this case, the gas flow rate value Q6 should be within the range of 100L / min to 150L / min.

[0066] It should be noted that after the mask-type compressed air self-rescue device 7 and the bag-type compressed air self-rescue device 8 have passed the air tightness inspection respectively, the gas pressure value of the pressure gauge 4-1 is set within a certain range by appropriately adjusting the pressure reducing valve, and fully opening the ball valve 2-2 and the ball valve 2-3. The mask-type compressed air self-rescue device 7 and the bag-type compressed air self-rescue device 8 can be tested at the same time. The specific testing process is the same as described above and will not be repeated here.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A detection system for a compressed air self-rescue device for a mine, characterized in that: It includes an air source control unit, a compressed air self-rescue device detection unit and a data processing unit; The gas source control unit has an input port for inputting test gas to adjust the test gas pressure; The compressed air self-rescue device detection unit has a first detection channel for detecting the mask-type compressed air self-rescue device and a second detection channel for detecting the bag-type compressed air self-rescue device. The input ports of the two detection channels are both connected to the output port of the gas source control unit. The compressed air self-rescue device detection unit is used to detect the gas flow and / or gas pressure of the mask-type compressed air self-rescue device and the bag-type compressed air self-rescue device; The data processing unit, whose signal input end is connected to the detection signal output end of the detection unit of the compressed air self-rescue device, is used to receive and process the gas flow and / or gas pressure signal, and save the processed signal; The gas source control unit includes a pressure reducing valve, a pressure gauge I and a flow meter I; the test gas is input into the input port of the pressure reducing valve, the input port of the pressure reducing valve is provided with a ball valve I, the output port of the pressure reducing valve is communicated with the input port of the pressure gauge I, the output port of the pressure gauge I is communicated with the input port of the flow meter I, the output port of the flow meter I is communicated with the input port of the first detection channel and the input port of the second detection channel, and the signal output end of the pressure gauge I is connected to the signal output end of the flow meter I and the signal input end of the data processing unit; The first detection channel includes a gas flow detection device I and a gas pressure detection device; the input port of the mask-type compressed air self-rescue device is connected with the output port of the gas source control unit, and a ball valve II is provided on the pipeline connecting the mask-type compressed air self-rescue device and the gas source control unit; the output port of the mask-type compressed air self-rescue device is successively connected with the input port of the gas flow detection device I and the input port of the gas pressure detection device, and the signal output end of the gas flow detection device I and the signal output end of the gas pressure detection device are respectively connected with the signal input end of the data processing unit.

2. The detection system of the compressed air self-rescue device for mines according to claim 1 is characterized in that: The gas flow detection device I includes a flow stabilizer I for stabilizing the gas flow and a flow meter II for measuring the gas flow of the mask-type compressed air self-rescue device; the input port of the flow stabilizer I is connected with the output port of the mask-type compressed air self-rescue device, and a ball valve III is provided on the pipeline connecting the flow stabilizer I and the mask-type compressed air self-rescue device; the output port of the flow stabilizer I is connected with the input port of the flow meter II, and the signal output end of the flow meter II is connected with the signal input end of the data processing unit.

3. The detection system of the compressed air self-rescue device for mines according to claim 1 is characterized in that: The gas pressure detection device includes a pressure gauge II for measuring the pressure difference between the inside and outside of the mask of the mask-type compressed air self-rescue device; the input port of the pressure gauge II is connected to the output port of the mask-type compressed air self-rescue device, and the signal output end of the pressure gauge II is connected to the signal input end of the data processing unit.

4. The detection system of the compressed air self-rescue device for mines according to claim 1 is characterized in that: The second detection channel includes a sealed cavity and a gas flow detection device II; the bag-type compressed air self-rescue device is arranged in the sealed cavity, the input port of the bag-type compressed air self-rescue device is connected with the output port of the gas source control unit, and a ball valve IV is provided on the pipeline connecting the bag-type compressed air self-rescue device and the gas source control unit; the output port of the sealed cavity is connected with the input port of the gas flow detection device II, and the signal output end of the gas flow detection device II is connected with the signal input end of the data processing unit.

5. The detection system of the compressed air self-rescue device for mines according to claim 4 is characterized in that: The gas flow detection device II includes a flow stabilizer II for stabilizing the gas flow and a flow meter III for measuring the gas flow of the bag-type compressed air self-rescue device; the input port of the flow stabilizer II is connected with the output port of the sealed chamber, and a ball valve V is provided on the pipeline connecting the flow stabilizer II and the sealed chamber, the output port of the flow stabilizer II is connected with the input port of the flow meter III, and the signal output end of the flow meter III is connected with the signal input end of the data processing unit.

6. The detection system of the compressed air self-rescue device for mines according to claim 1 is characterized in that: It also includes a gas flow calibration unit, which is used to calibrate the gas flow measurement values ​​of the mask-type compressed air self-rescue device and the bag-type compressed air self-rescue device; the input port of the gas flow calibration unit is connected to the output port of the mask-type compressed air self-rescue device and the output port of the bag-type compressed air self-rescue device.

7. The detection system of the compressed air self-rescue device for mines according to claim 6 is characterized in that: The gas flow calibration unit includes a flow stabilizer III and a flow meter IV. The first input port of the flow stabilizer III is connected to the output port of the mask-type compressed air self-rescue device, and a ball valve VI is provided on the pipeline connecting the flow stabilizer III and the mask-type compressed air self-rescue device; the second input port of the flow stabilizer III is connected to the output port of the bag-type compressed air self-rescue device, and a ball valve VII is provided on the pipeline connecting the flow stabilizer III and the bag-type compressed air self-rescue device; the output port of the flow stabilizer III is connected to the input port of the flow meter IV.

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