Multi-working-condition adjustable mine ventilation demonstration experiment system

Abstract

The utility model discloses a multi-working-condition adjustable mine ventilation demonstration experiment system which comprises an air inlet system, an air using system, an air return system and a measuring system. The air inlet system is used for providing required wind power for the air using system; the air using system is used for simulating different roadway ventilation conditions and comprises a first pipeline, a second pipeline, a third pipeline and a fourth pipeline; the air return system is used for exhausting air in the air using system; the measuring system is used for collecting ventilation data in the corresponding pipeline; according to the utility model, through the cooperation of all the systems, different conditions in a mine can be simulated, such as roadways with different angles, roadways with different wall surface roughness, roadways of uphill and downhill, roadways with different widths, working face mining roadways, layered mining roadways and tunneling roadways, and real-time ventilation data can be measured; the on-way resistance can be accurately calculated under different conditions, and students can know factors influencing the on-way resistance and master related knowledge points of the on-way resistance by comparing the on-way resistance under various conditions.

Description

Technical Field

[0001] The utility model relates to an experimental demonstration system, in particular to a mine ventilation demonstration experimental system which can be adjusted under multiple working conditions. Background Art

[0002] Mine Ventilation and Air Conditioning is a required core professional course for the safety engineering major. It is a course with a strong theoretical system and strong practicality. Through experiments, this course enables students to master the most basic and most commonly used ventilation experimental test techniques, test equipment, and test instruments that engineering and technical personnel engaged in mine safety work should have, and master the basic principles and methods of measuring air parameters in mines, measuring wind flow point pressure and ventilation resistance, and measuring fan performance. Through experiments, students can consolidate and deepen their understanding of the theoretical knowledge of mine ventilation and air conditioning, further strengthen their ability to analyze and solve problems independently, and cultivate their comprehensive design and practical abilities, and strengthen their cultivation of a pragmatic, serious and scientific style, laying a good foundation for future work.

[0003] The along-the-way resistance has always been a very important knowledge point and one of the knowledge points that must be mastered. In order to stimulate students' interest in learning and to be able to learn this knowledge point more deeply and intuitively, a ventilation demonstration experiment system related to this knowledge point is indispensable. The size of the along-the-way resistance is affected by various factors in the tunnel. The patent with application number CN202320911209 provides a multi-condition adjustable coal mine ventilation simulation experimental device. The device only serves the purpose of simulating the ventilation process and cannot reflect the influence of various conditions in the mine on the along-the-way resistance. For example, tunnels at different angles, excavation tunnels, and tunnels with different wall roughness will have an impact on the along-the-way resistance during the ventilation process. However, the existing experimental equipment cannot simulate the various variables in the mine to achieve the purpose of the experimental requirements.

[0004] Therefore, how to provide a ventilation demonstration experiment system that can change various variables in the mine, and reflect the influence of various conditions in the mine on the along-the-way resistance during the experiment, so that students can master the corresponding knowledge points through the experiment, is the technical problem that the utility model needs to solve. Summary of the invention

[0005] In view of the problems existing in the above-mentioned prior art, the utility model provides a multi-working condition adjustable mine ventilation demonstration experimental system, which can simulate different conditions in the mine, such as tunnels with different angles, tunnels with different wall roughness, uphill and downhill tunnels, tunnels of different widths, working face mining tunnels, layered mining tunnels and excavation tunnels, so as to realize the accurate calculation of the resistance along the way under different conditions, so that students can master the corresponding knowledge points through the experiment.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a multi-condition adjustable mine ventilation demonstration experimental system, including an air intake system, an air use system, a return air system and a measurement system;

[0007] The air inlet system is used to provide the required wind force for the air-using system, and includes a fan and an air inlet duct, the fan is connected to one end of the air inlet duct, and the other end of the air inlet duct is provided with two air inlet ports through a three-way structure;

[0008] The air system is used to simulate ventilation conditions of different lanes, and includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline; the first pipeline is used to simulate lanes at different angles, and includes a first pipeline section, a second pipeline section and a third pipeline section, one end of the first pipeline section is sealed and movably connected to one of the air inlet ports; the other end of the first pipeline section is sealed and movably connected to one end of the second pipeline section, a No. 1 guide rail is installed on the upper part of the third pipeline section along its direction, and a through groove is provided on the portion of the upper part of the third pipeline section where the No. 1 guide rail is arranged, and a hollow frame is provided on the No. 1 guide rail The hollow frame is mounted on the first guide rail through a pulley and can slide along the first guide rail; a baffle is installed in the third pipe section, and the baffle is fixedly connected to the hollow frame. When the hollow frame slides, it can drive the baffle to slide and seal along the pipe in the third pipe section; the other end of the second pipe section is movably connected to the hollow frame through a rotating shaft, so that the second pipe section slides relatively on the first guide rail through the hollow frame, so as to simulate lanes at different angles, and the outside of the hollow frame and the first guide rail are wrapped with flexible airtight materials, so that the second pipe section and the third pipe section are sealed and connected;

[0009] The second pipeline is used to simulate lanes of different widths, and includes a simulated uphill pipeline section, a simulated downhill pipeline section and a variable diameter pipeline section. The other end of the simulated uphill pipeline section is connected to another air inlet port. The top plate and the bottom plate in the variable diameter pipeline section are both equipped with a second guide rail perpendicular to the direction of the variable diameter pipeline section. The top and bottom of the two side walls of the variable diameter pipeline section are both installed on the second guide rail through pulleys and can slide along the second guide rail to simulate lanes of different widths. The two ends of the variable diameter pipeline section are sealed and connected to one end of the simulated uphill pipeline section and one end of the simulated downhill pipeline section through flexible airtight materials respectively.

[0010] The third pipeline is used to simulate a lane with different wall roughness, and includes two No. 2 scroll systems and a fourth pipeline section. Through grooves are provided on the top and both sides of the fourth pipeline section, and each through groove is provided with a flap for sealing the through groove; one end of the fourth pipeline section is connected to another air inlet port, and a rough layer is provided on the top surface and the side wall surface of the fourth pipeline section respectively; two No. 2 scroll systems are respectively installed at both ends of the fourth pipeline section, and the rough layers with different roughness on the top surface and the side wall surface of the fourth pipeline section are replaced by controlling the rotation of any No. 2 scroll system;

[0011] The fourth pipeline is used to simulate the working face mining tunnel and the simulated layered mining tunnel, which includes two connecting pipeline sections, a fifth pipeline section and two No. 1 reel systems; the two ends of the fifth pipeline section are respectively connected to one end of the two connecting pipeline sections, one of which is connected to the other air inlet port, and the fifth pipeline section is provided with a No. 1 simulated tunnel and a No. 2 simulated tunnel, the No. 2 simulated tunnel is located directly above the No. 1 simulated tunnel, and a mezzanine is provided between the two to simulate the regeneration roof; a flexible sealing layer is provided at the top of the No. 1 simulated tunnel, a through groove is provided at the top of the fifth pipeline section, and a flap is provided on the through groove to seal the through groove; the two No. 1 reel systems are respectively installed at the two ends of the upper part of the No. 2 simulated tunnel, and the deployment and recovery of the flexible sealing layer in the No. 1 simulated tunnel are achieved by controlling the rotation of any No. 2 reel system;

[0012] The return air system is used to discharge the wind in the air-using system, and includes an air outlet duct, one end of which is provided with two air outlet ports through a three-way structure; one of the air outlet ports is connected to the other end of the third pipe segment, and the other air outlet port is respectively connected to the other end of the simulated downhill pipe segment, the other end of the fourth pipe segment and another connecting pipe segment;

[0013] The measurement system includes a plurality of sensor units, each of which is distributed in each pipeline and is used to collect ventilation data in the corresponding pipeline.

[0014] Furthermore, the sealed and movable connection is a movable connection through a rotating shaft, and the connection between the two is sealed by a flexible airtight material.

[0015] Furthermore, the sensor unit is installed in each pipeline through a detection beam and a sensor bracket.

[0016] Furthermore, the fourth pipeline segment and the fifth pipeline segment are both provided with electromagnets, and magnetic materials are distributed on the rough layer and the flexible sealing layer; the rough layer is fixed in the fourth pipeline by the magnetic attraction generated by the electromagnet, and the flexible sealing layer is fixed in the fifth pipeline by the magnetic attraction generated by the electromagnet.

[0017] Furthermore, the second reel system includes a main driving mechanism, a top laying and recovery mechanism and two side laying and recovery mechanisms, the two side laying and recovery mechanisms are symmetrically arranged on both sides of the fourth pipeline segment, the side laying and recovery mechanism includes a side reel and a support, the support is fixed to the side of the fourth pipeline segment, the side reel is vertically mounted on the support and can rotate relative to the support, and the side reel is connected to the rough layer on the inner side wall surface of the fourth pipeline segment through a traction rope; the top laying and recovery mechanism is installed on the upper part of the fourth pipeline segment, and includes a support frame and a top reel, the support frame is fixed to the upper part of the fourth pipeline segment, The top reel is horizontally mounted on the top bracket and can rotate relative to the support frame. The top reel is connected to the rough layer on the top surface inside the fourth pipe section through a traction rope; the main driving mechanism includes a protective shell, a transmission shaft and a handle. The protective shell is fixed to the outside of the fourth pipe section. The transmission shaft is horizontally mounted in the protective shell and can rotate relative to the protective shell. Gears are provided on the transmission shaft, side reels and top reel, and the transmission shaft is respectively engaged with the side reel and the top reel through gears for transmission; the handle is on one side of the protective shell, and it extends into the protective shell and is coaxially connected to one end of the transmission shaft, so as to drive the transmission shaft to rotate.

[0018] Furthermore, the No. 1 reel system includes a main drive mechanism and a top layout and recovery mechanism, and the main drive mechanism and the top layout and recovery mechanism are exactly the same as those of the No. 2 reel system.

[0019] Furthermore, the three-way structure in the air intake system is provided with a first air gate and a tenth air gate, the three-way structure in the return air system is provided with a second air gate and a third air gate, the air inlet port is respectively connected to one end of the simulated uphill pipeline section, one end of the fourth pipeline section and the connecting pipeline section with a twelfth air gate, a ninth air gate and an eighth air gate; the air outlet port is respectively connected to the other end of the simulated downhill pipeline section, the other end of the fourth pipeline section and another connecting pipeline section with an eleventh air gate, a fourth air gate and a fifth air gate.

[0020] Compared with the prior art, the utility model adopts a combination of air intake system, air use system, return air system and measurement system, which has the following advantages:

[0021] 1. The utility model designs a slide rail system, which can realize the change of the tunnel angle or the change of the tunnel width. The purpose of changing the tunnel angle or width is achieved by moving the pulley on the guide rail. The good ductility of the flexible airtight material is used to improve the sealing performance of the slide rail system. It is arranged on the side where the angle or width changes. In addition, the magnetic powder material is embedded around it, and the strong magnetic adsorption capacity generated by the electromagnetic coil can tightly adsorb the magnetic material around the flexible airtight material to the inner wall of the pipeline, so that the tunnel has better sealing performance.

[0022] 2. The utility model designs a No. 1 reel system and a No. 2 reel system. By rotating the handle, the transmission shaft and gears inside the system are driven to rotate, and the traction rope is rolled onto the reel, so that the traction rope drives the rough layer and the flexible sealing layer to move in the tunnel to replace the inner wall material, thereby changing the inner wall roughness and simulating the working face mining tunnel and the simulated layered mining tunnel.

[0023] 3. Through the cooperation of various systems, the utility model can simulate different situations in the mine, such as tunnels with different angles, tunnels with different wall roughness, uphill and downhill tunnels, tunnels of different widths, working face mining tunnels, layered mining tunnels and excavation tunnels, and then through the sensor units arranged in the tunnels, the purpose of measuring real-time data is achieved, and the along-the-way resistance of different tunnels is calculated according to relevant data, thereby realizing the accurate calculation of the along-the-way resistance under different conditions. By comparing the along-the-way resistance under various conditions, students can understand the factors affecting the along-the-way resistance and master the relevant knowledge points of the along-the-way resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a top view of the utility model;

[0025] Figure 2 It is a numbered diagram of each position of the utility model;

[0026] Figure 3 This is an enlarged view of the P area of ​​the utility model;

[0027] Figure 4 It is a three-dimensional schematic diagram of the P area of ​​the utility model;

[0028] Figure 5 This is a cross-sectional view of the second reel system of the utility model;

[0029] Figure 6 This is an enlarged view of the Q area of ​​the utility model;

[0030] Figure 7 This is an enlarged view of the R area of ​​the utility model;

[0031] Figure 8 This is a schematic diagram of the MJ section of the tunnel of the utility model.

[0032] In the figure: 1: first damper; 2: second damper; 3: third damper; 4: fourth damper; 5: fifth damper; 6: sixth damper; 7: seventh damper; 8: eighth damper; 9: ninth damper; 10: tenth damper; 11: eleventh damper; 12: twelfth damper; 13: sensor bracket; 14: rotating shaft; 15: guide rail No. 1; 16: flexible airtight material; 17: reel system No. 1; 18: flip cover; 19: reel system No. 2; 20: air inlet duct; 21: Air outlet duct; 22: hollow frame; 23: baffle; 24: interlayer; 25: handle; 26: simulated tunnel No. 1; 27: simulated tunnel No. 2; 28: detection beam; 29: fourth pipeline section; 30: fan; 31: guide rail No. 2; 32: pulley; 33: transmission shaft; 34: gear; 35: side reel; 36: support frame; 37: support; 38: protective shell; 39: traction rope; 40: electromagnet; A: air intake system; B: air use system; C: return air system. DETAILED DESCRIPTION

[0033] The utility model will be further described below.

[0034] like Figure 1 and 2 As shown, the utility model includes an air intake system, an air use system, an air return system and a measurement system;

[0035] The air intake system is used to provide the required wind force for the air-using system, and includes a fan 30 and an air intake duct 20. The fan 30 is connected to one end of the air intake duct 20, and the other end of the air intake duct 20 is provided with two air intake ports E and M through a three-way structure S;

[0036] The air system is used to simulate ventilation conditions of different lanes, and includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline; the first pipeline is used to simulate lanes at different angles, and includes a first pipeline segment EF, a second pipeline segment GH and a third pipeline segment NO, one end of the first pipeline segment EF is sealed and movably connected to the air inlet port E; the other end of the first pipeline segment EF is sealed and movably connected to one end of the second pipeline segment GH, such as Figure 3 and 4As shown, a guide rail No. 15 is installed along the direction of the upper part of the third pipe segment NO, and a through groove is provided in the portion of the upper part of the third pipe segment NO where the guide rail No. 15 is arranged, and a hollow frame 22 is provided on the guide rail No. 1, and the hollow frame 22 is installed on the guide rail No. 1 through a pulley, and can slide along the guide rail No. 15; a baffle 23 is installed in the third pipe segment NO, and the baffle 23 is fixedly connected to the hollow frame 22, and when the hollow frame 22 slides, it can drive the baffle 23 to slide and seal along the pipe in the third pipe segment NO; the other end of the second pipe segment GH is movably connected to the hollow frame 22 through a rotating shaft, so that the second pipe segment GH can slide relatively on the guide rail No. 15 through the hollow frame 22, so as to simulate lanes of different angles, and the hollow frame 22 and the guide rail No. 15 are wrapped with flexible airtight materials on the outside, so that the second pipe segment GH is sealed and connected with the third pipe segment NO;

[0037] The second pipeline is used to simulate lanes of different widths, and includes a simulated uphill pipeline section MD, a simulated downhill pipeline section IJ and a variable diameter pipeline section UX. The other end of the simulated uphill pipeline section MD is connected to another air inlet port. The top plate and the bottom plate in the variable diameter pipeline section UX are both equipped with a second guide rail 31 perpendicular to the direction of the variable diameter pipeline section UX. The top and bottom of the two side walls of the variable diameter pipeline section UX are both installed on the second guide rail 31 through pulleys and can slide along the second guide rail 31 to simulate lanes of different widths. The two ends of the variable diameter pipeline section UX are sealed and connected to one end of the simulated uphill pipeline section MD and one end of the simulated downhill pipeline section IJ through a flexible airtight material 16 respectively.

[0038] The third pipeline is used to simulate a lane with different wall roughness, and includes two No. 2 scroll systems 19 and a fourth pipeline section MJ. Through grooves are provided on the top and both sides of the fourth pipeline section MJ, and each through groove is provided with a flip cover 18 for sealing the through groove; one end of the fourth pipeline section MJ is connected to another air inlet port, and a rough layer is provided on the top surface and the side wall surface of the fourth pipeline section MJ respectively; two No. 2 scroll systems 19 are respectively installed at both ends of the fourth pipeline section MJ, and the rough layers with different roughness on the top surface and the side wall surface of the fourth pipeline section MJ are replaced by controlling the rotation of any No. 2 scroll system 19;

[0039] The fourth pipeline is used to simulate the working face mining tunnel and the simulated layered mining tunnel, which includes two connecting pipeline sections ML and KJ, a fifth pipeline section LK and two No. 1 reel systems 17; the two ends of the fifth pipeline section LK are respectively connected to one end of the two connecting pipeline sections ML and KJ, wherein the connecting pipeline section ML is connected to the air inlet port M, such as Figure 6As shown, the fifth pipeline section LK is provided with a No. 1 simulated lane 26 and a No. 2 simulated lane 27, the No. 2 simulated lane 27 is located directly above the No. 1 simulated lane 26, and a sandwich is provided between the two. The top and bottom of the sandwich 24 are separated from the No. 1 simulated lane 26 and the No. 2 simulated lane 27 by a gauze mesh, and the sandwich is filled with ceramsite and other materials for simulating the regeneration roof; a flexible sealing layer is provided at the top of the No. 1 simulated lane 26, and the flexible sealing layer is made of a flexible airtight material 16. A through groove is provided at the top of the fifth pipeline section LK, and a flap 18 is provided on the through groove for sealing the through groove; two No. 1 reel systems 17 are respectively installed at the two ends of the upper part of the No. 2 simulated lane 27, and the layout and recovery of the flexible sealing layer in the No. 1 simulated lane 26 are realized by controlling the rotation of any No. 2 reel system 17;

[0040] The return air system is used to discharge the wind in the air-using system, and includes an air outlet duct 21, one end of which is provided with two air outlet ports O and J through a three-way structure T; the air outlet port O is connected to the other end of the third pipe segment NO, and the air outlet port J is respectively connected to the other end of the simulated downhill pipe segment IJ, the other end of the fourth pipe segment MJ and the connecting pipe segment KJ;

[0041] The sealed and movable connection is a movable connection through a rotating shaft, and the connection between the two is sealed by a flexible airtight material 16; Figure 7 and 8 As shown, the sensor unit is installed in each pipeline through the detection beam 28 and the sensor bracket 13; the fourth pipeline section and the fifth pipeline section are both provided with an electromagnet 40, and magnetic materials are distributed on the rough layer and the flexible sealing layer; the rough layer is fixed in the fourth pipeline by the magnetic attraction generated by the electromagnet 40, and the flexible sealing layer is fixed in the fifth pipeline by the magnetic attraction generated by the electromagnet 40.

[0042] The measuring system includes a plurality of sensor units, each of which is distributed in each pipeline and used to collect ventilation data in the corresponding pipeline, and transmit the collected ventilation data to a computer to calculate the resistance along the way through a known formula and display it on a computer screen.

[0043] The three-way structure S in the air intake system is provided with a first air damper 1 and a tenth air damper 10, the three-way structure T in the return air system is provided with a second air damper 2 and a third air damper 3, the air intake port is respectively connected with one end of the simulated uphill pipeline segment MD, one end of the fourth pipeline segment and the connecting pipeline segment at the connection points thereof with a twelfth air damper 12, a ninth air damper 9 and an eighth air damper 8; the air outlet port is respectively connected with the other end of the simulated downhill pipeline segment IJ, the other end of the fourth pipeline segment and another connecting pipeline segment at the connection points thereof with an eleventh air damper 11, a fourth air damper 4 and a fifth air damper 5.

[0044] The above-mentioned flexible airtight material 16, rough layer, electromagnet 40, flexible sealing layer and sensor unit are all existing components and materials, which can be purchased on the market.

[0045] In addition, the first reel system 17 and the second reel system 19 can use existing equipment to implement the present invention, or can use the following structure designed by the present invention, which can better replace the rough layer and the flexible sealing layer;

[0046] like Figure 5 As shown, the second reel system 19 includes a main driving mechanism, a top laying and recovery mechanism and two side laying and recovery mechanisms, the two side laying and recovery mechanisms are symmetrically arranged on both sides of the fourth pipeline segment MJ, the side laying and recovery mechanism includes a side reel 35 and a support 37, the support 37 is fixed to the side of the fourth pipeline segment MJ, the side reel 35 is vertically mounted on the support 37 and can rotate relative to the support 37, the side reel 35 is connected to the rough layer on the inner wall surface of the fourth pipeline segment MJ through a traction rope 39; the top laying and recovery mechanism is installed on the upper part of the fourth pipeline segment MJ, and includes a support frame 36 and a top reel, the support frame 36 is fixed to the upper part of the fourth pipeline segment MJ, and the top reel is horizontally mounted on the support frame 36. It is mounted on the top bracket and can rotate relative to the support frame 36. The top reel is connected to the rough layer on the top surface of the fourth pipe section MJ through a traction rope 39; the main driving mechanism includes a protective shell 38, a transmission shaft 33 and a handle 25. The protective shell 38 is fixed to the outside of the fourth pipe section MJ. The transmission shaft 33 is horizontally mounted in the protective shell 38 and can rotate relative to the protective shell 38. Gears 34 are provided on the transmission shaft 33, the side reels 35 and the top reel, and the transmission shaft 33 is respectively engaged with the side reels 35 and the top reel through the gears 34 for transmission; the handle 25 is on one side of the protective shell 38, and it extends into the protective shell 38 and is coaxially connected to one end of the transmission shaft 33, so as to drive the transmission shaft 33 to rotate.

[0047] The first reel system 17 includes a main drive mechanism and a top layout and recovery mechanism, and the main drive mechanism and the top layout and recovery mechanism are exactly the same as those of the second reel system 19.

[0048] Before the experiment, all dampers are in a closed state. If it is necessary to simulate lanes with different angles, open the first damper 1 and the second damper 2 and start the fan 30. At this time, the wind passes through the first pipe from the air inlet channel 20 and is discharged from the air outlet channel 21. During the ventilation process, the other end of the second pipe segment GH is controlled to slide relatively on the third pipe segment NO to achieve the simulation of lanes with different angles. Then, the sensor unit in the first pipe can collect corresponding ventilation data, and then the collected ventilation data is transmitted to the computer to calculate the resistance along the way and display it, so as to simulate the change of the influence of changing the angle of the lane on the resistance along the way. After completion, the fan and the first damper 1 and the second damper 2 are closed.

[0049] If it is necessary to simulate alleys of different widths, simulated uphill alleys and simulated downhill alleys, open the tenth damper 10, the twelfth damper 12, the eleventh damper 11 and the third damper 3 and start the fan 30. At this time, the wind passes through the second pipe from the air inlet channel 20 and is discharged from the air outlet channel 21. During the ventilation process, the width of the second pipe is adjusted, and then the sensor unit in the second pipe can collect corresponding ventilation data. The collected ventilation data is then transmitted to the computer to calculate the resistance along the way and display it, so as to simulate the influence of different alley widths on the resistance along the way and the influence of going up and down the mountain on the resistance along the way. After completion, close the fan and the tenth damper 10, the twelfth damper 12, the eleventh damper 11 and the third damper 3.

[0050] If it is necessary to simulate lanes with different wall roughness, open the tenth damper 10, the ninth damper 9, the fourth damper 4 and the third damper 3 and start the fan 30. At this time, the wind passes through the third pipe from the air inlet channel 20 and is discharged from the air outlet channel 21. During the ventilation process, the sensor unit in the third pipe first collects the corresponding ventilation data when the rough layer is inside the pipe, and then transmits the collected ventilation data to the computer to calculate the resistance along the way and display it; then open the flap 18, close the electromagnet 40 in the third pipe, and control a No. 2 reel system 19 to rotate. At this time, the top reel drags the rough layer on the top surface of the fourth pipe section MJ in the third pipe through the traction rope 39 to move, and at the same time, the side reel 35 drags the rough layer on the inner wall surface of the fourth pipe section MJ in the third pipe through the traction rope 39 to move until the rough layer is dragged out of the through groove. At this time, close the flap 18 to complete a replacement process, and then the sensor unit in the third pipe is turned on. The sensor unit then collects the corresponding ventilation data at this time, and then transmits the collected ventilation data to the computer to calculate the along-the-way resistance and display it. The two are compared to realize the calculation of the along-the-way resistance of the tunnels with different wall roughness, and to simulate the influence of the tunnels with different wall roughness on the along-the-way resistance; after completion, the fan 30 and the tenth damper 10, the ninth damper 9, the fourth damper 4 and the third damper 3 are closed; the flaps 18 of each through slot are opened, and another No. 2 reel system 19 is controlled to rotate. At this time, the top reel drags the rough layer on the top surface through the through slot into the fourth pipe section MJ in the third pipe through the traction rope 39, and at the same time, the side reel 35 drags the rough layer on the inner wall surface through the through slot into the fourth pipe section MJ in the third pipe through the traction rope 39. After reaching the reset position, the No. 2 reel system 19 stops rotating, and the electromagnet 40 is started. At this time, each rough layer is fixed in the fourth pipe section MJ by magnetic attraction to complete the reset work.

[0051] If it is necessary to simulate the working face mining tunnel and simulate the layered mining tunnel, open the tenth damper 10, the eighth damper 8, the seventh damper 7, the sixth damper 6, the fifth damper 5 and the third damper 3 and start the fan 30. At this time, the wind passes through the fourth pipe from the air inlet channel 20 and is discharged from the air outlet channel 21. During the ventilation process, the flexible sealing layer seals and separates the No. 1 simulated tunnel 26 and the No. 2 simulated tunnel 27. The current situation is simulated working face mining; the sensor unit in the fourth pipe collects the current corresponding ventilation data, and then transmits the collected ventilation data to the computer to calculate the resistance along the way and display it; the calculation of the resistance along the way when simulating the working face mining tunnel is realized; then open the flap 18, close the electromagnet 40 in the fourth pipe, and control a No. 1 reel system 17 to rotate. At this time, the top reel drags the flexible sealing layer at the top of the No. 1 simulated tunnel 26 through the traction rope 39 until the flexible sealing layer is dragged out of the through groove. At this time, close the flap 18 to complete one The replacement process is currently simulating the layered mining tunnel (that is, the No. 1 simulated tunnel 26 and the No. 2 simulated tunnel 27 are connected through the pores of the interlayer 24, and the interlayer 24 serves as a simulated regenerated roof). Then the sensor unit in the fourth pipeline collects the corresponding ventilation data at this time, and then transmits the collected ventilation data to the computer to calculate the along-the-way resistance and display it, so as to realize the change of the influence of the porosity of the regenerated roof on the along-the-way resistance under the simulated layered mining condition; after completion, the fan 30 and the tenth damper 10, the eighth damper 8, the seventh damper 7, the sixth damper 6, the fifth damper 5 and the third damper 3 are closed; the flaps 18 of each through slot are opened, and another No. 1 reel system 17 is controlled to rotate. At this time, the top reel drags the flexible sealing layer through the through slot into the No. 1 simulated tunnel 26 through the traction rope 39. After reaching the reset position, the No. 1 reel system 17 stops rotating, and the electromagnet 40 is started. At this time, the flexible sealing layer is fixed in the fifth pipeline section LK by magnetic attraction to complete the reset work.

[0052] If it is necessary to simulate the excavation of a tunnel, open the tenth damper 10, the eighth damper 8, the ninth damper 9, the fourth damper 4, the fifth damper 5 and the third damper 3. At this time, the wind passes through the third pipe from the air inlet channel 20 and is discharged from the air outlet channel 21. The pipe sections ML and KJ are connected to simulate the tunnel being excavated. The sensor unit in the pipeline collects the current corresponding ventilation data, and then transmits the collected ventilation data to the computer to calculate the along-the-way resistance and display it; the calculation of the along-the-way resistance when simulating the working face mining tunnel is realized.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A multi-condition adjustable mine ventilation demonstration experimental system, It is characterized in that Including air intake system, air use system, return air system and measurement system; The air inlet system is used to provide the required wind force for the air-using system, and includes a fan and an air inlet duct, the fan is connected to one end of the air inlet duct, and the other end of the air inlet duct is provided with two air inlet ports through a three-way structure; The air system is used to simulate ventilation conditions of different lanes, and includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline; the first pipeline is used to simulate lanes at different angles, and includes a first pipeline section, a second pipeline section and a third pipeline section, one end of the first pipeline section is sealed and movably connected to one of the air inlet ports; the other end of the first pipeline section is sealed and movably connected to one end of the second pipeline section, a No. 1 guide rail is installed on the upper part of the third pipeline section along its direction, and a through groove is provided on the portion of the upper part of the third pipeline section where the No. 1 guide rail is arranged, and a hollow frame is provided on the No. 1 guide rail The hollow frame is mounted on the first guide rail through a pulley and can slide along the first guide rail; a baffle is installed in the third pipe section, and the baffle is fixedly connected to the hollow frame. When the hollow frame slides, it can drive the baffle to slide and seal along the pipe in the third pipe section; the other end of the second pipe section is movably connected to the hollow frame through a rotating shaft, so that the second pipe section slides relatively on the first guide rail through the hollow frame, so as to simulate lanes at different angles, and the outside of the hollow frame and the first guide rail are wrapped with flexible airtight materials, so that the second pipe section and the third pipe section are sealed and connected; The second pipeline is used to simulate lanes of different widths, and includes a simulated uphill pipeline section, a simulated downhill pipeline section and a variable diameter pipeline section. The other end of the simulated uphill pipeline section is connected to another air inlet port. The top plate and the bottom plate in the variable diameter pipeline section are both equipped with a second guide rail perpendicular to the direction of the variable diameter pipeline section. The top and bottom of the two side walls of the variable diameter pipeline section are both installed on the second guide rail through pulleys and can slide along the second guide rail to simulate lanes of different widths. The two ends of the variable diameter pipeline section are sealed and connected to one end of the simulated uphill pipeline section and one end of the simulated downhill pipeline section through flexible airtight materials respectively. The third pipeline is used to simulate a lane with different wall roughness, and includes two No. 2 scroll systems and a fourth pipeline section. Through grooves are provided on the top and both sides of the fourth pipeline section, and each through groove is provided with a flap for sealing the through groove; one end of the fourth pipeline section is connected to another air inlet port, and a rough layer is provided on the top surface and the side wall surface of the fourth pipeline section respectively; two No. 2 scroll systems are respectively installed at both ends of the fourth pipeline section, and the rough layers with different roughness on the top surface and the side wall surface of the fourth pipeline section are replaced by controlling the rotation of any No. 2 scroll system; The fourth pipeline is used to simulate the working face mining tunnel and the simulated layered mining tunnel, which includes two connecting pipeline sections, a fifth pipeline section and two No. 1 reel systems; the two ends of the fifth pipeline section are respectively connected to one end of the two connecting pipeline sections, one of which is connected to the other air inlet port, and the fifth pipeline section is provided with a No. 1 simulated tunnel and a No. 2 simulated tunnel, the No. 2 simulated tunnel is located directly above the No. 1 simulated tunnel, and a mezzanine is provided between the two to simulate the regeneration roof; a flexible sealing layer is provided at the top of the No. 1 simulated tunnel, a through groove is provided at the top of the fifth pipeline section, and a flap is provided on the through groove to seal the through groove; the two No. 1 reel systems are respectively installed at the two ends of the upper part of the No. 2 simulated tunnel, and the deployment and recovery of the flexible sealing layer in the No. 1 simulated tunnel are achieved by controlling the rotation of any No. 2 reel system; The return air system is used to discharge the wind in the air-using system, and includes an air outlet duct, one end of which is provided with two air outlet ports through a three-way structure; one of the air outlet ports is connected to the other end of the third pipe segment, and the other air outlet port is respectively connected to the other end of the simulated downhill pipe segment, the other end of the fourth pipe segment and another connecting pipe segment; The measurement system includes a plurality of sensor units, each of which is distributed in each pipeline and is used to collect ventilation data in the corresponding pipeline.

2. According to the multi-condition adjustable mine ventilation demonstration experimental system of claim 1, It is characterized in that The sealed and movable connection is a movable connection through a rotating shaft, and the connection between the two is sealed by a flexible airtight material.

3. According to the multi-condition adjustable mine ventilation demonstration experimental system of claim 1, It is characterized in that The sensor unit is installed in each pipeline through a detection beam and a sensor bracket.

4. According to the multi-condition adjustable mine ventilation demonstration experimental system of claim 1, It is characterized in that The fourth pipeline section and the fifth pipeline section are both provided with electromagnets, and magnetic materials are distributed on the rough layer and the flexible sealing layer; the rough layer is fixed in the fourth pipeline by the magnetic attraction generated by the electromagnet, and the flexible sealing layer is fixed in the fifth pipeline by the magnetic attraction generated by the electromagnet.

5. According to the multi-condition adjustable mine ventilation demonstration experimental system of claim 1, It is characterized in that The second reel system includes a main driving mechanism, a top laying and recovery mechanism and two side laying and recovery mechanisms. The two side laying and recovery mechanisms are symmetrically arranged on both sides of the fourth pipeline segment. The side laying and recovery mechanism includes a side reel and a support. The support is fixed to the side of the fourth pipeline segment. The side reel is vertically installed on the support and can rotate relative to the support. The side reel is connected to the rough layer on the inner wall surface of the fourth pipeline segment through a traction rope; the top laying and recovery mechanism is installed on the upper part of the fourth pipeline segment, and includes a support frame and a top reel. The support frame is fixed to the upper part of the fourth pipeline segment. The top The reel is horizontally mounted on the top support and can rotate relative to the support frame. The top reel is connected to the rough layer on the top surface inside the fourth pipe section through a traction rope. The main driving mechanism includes a protective shell, a transmission shaft and a handle. The protective shell is fixed to the outside of the fourth pipe section. The transmission shaft is horizontally mounted in the protective shell and can rotate relative to the protective shell. Gears are provided on the transmission shaft, side reels and top reel, and the transmission shaft is respectively engaged with the side reel and the top reel through gears for transmission. The handle is on one side of the protective shell, and it extends into the protective shell and is coaxially connected to one end of the transmission shaft, so as to drive the transmission shaft to rotate.

6. According to claim 5, the multi-condition adjustable mine ventilation demonstration experimental system, It is characterized in that The No. 1 reel system comprises a main drive mechanism and a top arrangement and recovery mechanism, and the main drive mechanism and the top arrangement and recovery mechanism are exactly the same as those of the No. 2 reel system.

7. According to claim 1, the multi-condition adjustable mine ventilation demonstration experimental system, It is characterized in that The three-way structure in the air intake system is provided with a first air gate and a tenth air gate, the three-way structure in the return air system is provided with a second air gate and a third air gate, the air inlet port is respectively connected to one end of the simulated uphill pipeline section, one end of the fourth pipeline section and the connecting pipeline section with a twelfth air gate, a ninth air gate and an eighth air gate; the air outlet port is respectively connected to the other end of the simulated downhill pipeline section, the other end of the fourth pipeline section and another connecting pipeline section with an eleventh air gate, a fourth air gate and a fifth air gate.

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