A similar simulation experimental device for dead-end tunnel ventilation

Abstract

The present invention provides a similar simulation experimental device for dead-end tunnel ventilation, comprising a ventilation tunnel, a wind tube disposed in the ventilation tunnel, a moving device for driving the wind tube to move along the X, Y, and Z axes, a tilting device disposed at the bottom of the ventilation tunnel for simulating an inclined tunnel, and a monitoring device for analyzing the migration pattern of a simulated medium in the ventilation tunnel. The wind tube is connected to the Y-axis moving device via a wind tube suspension device. By providing an X-axis moving device, a Y-axis moving device, and a Z-axis moving device, the wind tube can be freely changed in three dimensions: distance from the side wall, suspension height, and distance from the front face. By providing a tilting device, the ventilation tunnel can be tilted at different angles to simulate an actual inclined tunnel underground. The monitoring device detects the working conditions in the ventilation tunnel and analyzes the migration pattern of the simulated medium. The similar simulation experimental device for dead-end tunnel ventilation of the present invention can effectively improve experimental efficiency and the accuracy of experimental data.

Description

Technical Field

[0001] The invention relates to the technical field of ventilation simulation, in particular to a similar simulation experimental device for dead-end tunnel ventilation. Background Art

[0002] Dead-end tunnels have only one exit, making it difficult to establish a through-flow. This allows for the accumulation of large amounts of toxic and harmful gases and dust within the tunnel, posing a serious threat to the physical and mental health of mine workers. Therefore, methods and technologies for preventing and controlling dust, high temperatures, and toxic and harmful gases within dead-end tunnels are currently a hot topic and a challenge.

[0003] Currently, numerical simulation is often used to explore and analyze the optimization of ventilation parameters in dead-end tunnels. To reduce the error between numerical simulation and field measurements and achieve more accurate simulations, researchers have prioritized combining numerical simulation with field measurements. However, field measurements are difficult to perform, costly, inefficient, and time-consuming. Therefore, similar experimental models developed based on similarity principles and field data have become the mainstream method for verifying the accuracy and practicality of simulation results.

[0004] In existing ventilation simulation experimental platforms, the position of suspended air ducts is typically fixed or manually adjusted when needed. This not only increases the difficulty of conducting experiments but also challenges the accuracy of experimental data. Furthermore, existing cul-de-sac ventilation devices are fixed, making it impossible to adjust the tilt of the entire experimental device based on the actual inclination of the cul-de-sac.

[0005] In view of this, it is necessary to provide a new simulation experimental device to improve the experimental efficiency and the accuracy of experimental data. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a similar simulation experimental device for dead-end tunnel ventilation, which can freely change the three dimensions of the air duct distance from the side wall, the hanging height and the distance from the head surface, and can adjust the inclination angle of the dead-end tunnel similar experimental model device, and at the same time can monitor and analyze the migration law of the simulated medium in the dead-end tunnel, thereby improving the experimental efficiency and the accuracy of the experimental data.

[0007] The technical solution of the present invention is:

[0008] A similar simulation experimental device for dead-end tunnel ventilation includes a ventilation tunnel, a wind tube disposed in the ventilation tunnel, a moving device for driving the wind tube to move along the X-axis, Y-axis, and Z-axis, a tilting device disposed at the bottom of the ventilation tunnel for simulating an inclined tunnel, and a monitoring device for analyzing the migration pattern of a simulated medium in the ventilation tunnel;

[0009] The moving device includes an X-axis moving device, a Y-axis moving device, and a Z-axis moving device, wherein the X-axis moving device includes multiple sets of X-axis double slide rails provided in the ventilation tunnel, a first pulley and a second pulley corresponding to each set of X-axis double slide rails, a first rotating shaft connecting the first pulley and the second pulley, and a first driving device for driving the first rotating shaft;

[0010] The Z-axis moving device is connected to the X-axis moving device, and includes a pulley fixing device connected to the X-axis moving device, a Z-axis lifting pulley provided on the pulley fixing device, a lifting rope wound around the Z-axis lifting pulley, and a second driving device for driving the Z-axis lifting pulley to rotate to realize the rope retraction / release of the lifting rope;

[0011] The Y-axis moving device is connected to the Z-axis moving device, and includes a Y-axis slide rail connected to the lifting rope, a Y-axis pulley provided at the front end of the Y-axis slide rail, and a third driving device for driving the Y-axis pulley to move along the Y-axis slide rail;

[0012] The wind duct is connected to the Y-axis moving device through a wind duct suspension device. The wind duct suspension device includes a first fixed part connected to the Y-axis pulley and driven by the Y-axis pulley, several second fixed parts fixed to the Y-axis slide rail near the tunnel exit end, and a suspension member connected to the first fixed part and the second fixed part. The wind duct is movably mounted on the suspension member.

[0013] Furthermore, the Y-axis slide rail includes a first Y-axis slide rail near the head end and a second Y-axis slide rail near the tunnel exit end. The length of the first Y-axis slide rail is 1 / 3 of the length of the ventilation tunnel, and the length of the second Y-axis slide rail is 2 / 3 of the length of the ventilation tunnel.

[0014] Furthermore, the suspension member is a ring, and the air duct passes through the ring. When the third driving device drives the Y-axis pulley to move, the Y-axis pulley drives the suspension member corresponding to the first fixed part to move, thereby realizing the movement of the air duct in the Y-axis direction.

[0015] Furthermore, the tilting device includes a central axis supporting device provided on a horizontal plane and used to support the middle of the ventilation tunnel, and a telescopic device provided at the bottom of the ventilation tunnel, and the telescopic device drives the ventilation tunnel to tilt.

[0016] Furthermore, the inclination angle of the ventilation tunnel is 0-15°.

[0017] Furthermore, the monitoring device includes a sliding guide rail arranged on one side of the ventilation tunnel, a roller cooperating with the sliding guide rail, a fourth driving device driving the roller to slide along the sliding guide rail, a photographic device driven by the roller to slide and used to record the image of the migration of the simulated medium, a data acquisition device for detecting the working parameters and the concentration of the simulated medium in the ventilation tunnel, and a data processing device. The photographic device and the data acquisition device send the detection data to the data processing device for analyzing the migration law of the simulated medium.

[0018] Furthermore, the operating parameters include wind speed, wind pressure, temperature and humidity, and the simulated medium concentration is dust and / or toxic gas.

[0019] Furthermore, the first driving device, the second driving device and the third driving device are respectively connected to the mobile terminal for communication.

[0020] Compared with the prior art, the dead-end tunnel ventilation simulation experimental device provided by the present invention has the following beneficial effects:

[0021] The present invention provides a similar experimental device for cul-de-sac ventilation simulation. By providing X-axis, Y-axis, and Z-axis motion devices, the air duct can be freely adjusted in three dimensions: distance from the sidewall, hanging height, and distance from the front face. A tilting device allows the ventilation tunnel to be tilted at different angles to simulate an actual underground inclined tunnel. A monitoring device monitors the operating conditions within the ventilation tunnel and analyzes the migration patterns of the simulated medium. This device can effectively improve experimental efficiency and the accuracy of experimental data. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 Schematic diagram of the structure of the similar simulation experimental device for dead-end tunnel ventilation of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the X-axis moving device in the present invention;

[0025] Figure 3 yes Figure 2 The schematic diagram of the first driving device in the X-axis moving device shown;

[0026] Figure 4 It is a schematic structural diagram of the Z-axis moving device in the present invention;

[0027] Figure 5 It is a schematic structural diagram of the Y-axis moving device in the present invention;

[0028] Figure 6 This is a schematic diagram of the connection between the Y-axis moving device and the wind tube suspension device in the present invention;

[0029] Figure 7 It is a schematic diagram of the connection between the tilting device and the ventilation tunnel in the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solutions in the embodiments of the present invention and to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific implementation methods of the present invention are further described below.

[0031] The endpoints of the ranges and any values ​​disclosed herein are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoints of each range, the endpoints of each range and individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed herein.

[0032] See also Figure 1 , is a schematic diagram of the structure of a similar experimental device for dead-end tunnel ventilation according to the present invention. The device comprises a ventilation tunnel 1, a duct 2, a moving device 3 for driving the duct along the X, Y, and Z axes, a tilting device 4 located at the bottom of ventilation tunnel 1 for simulating an inclined tunnel, and a monitoring device 5 for analyzing the migration patterns of the simulated medium within the ventilation tunnel.

[0033] Ventilation tunnel 1 consists of a bottom plate, a top plate, two side plates, and an end plate. To facilitate real-time recording of simulated medium migration within the ventilation tunnel by monitoring device 5, the ventilation tunnel is preferably constructed of a transparent material. The dimensions of ventilation tunnel 1 are designed to scale with those of an actual dead-end tunnel to ensure data reliability.

[0034] The fan 2 is suspended, and its movement in the X, Y, and Z axes is controlled by a moving device 3, allowing the fan to freely change in three dimensions: distance from the side walls, suspension height, and distance from the front face. In this embodiment, the X-axis corresponds to the left-right direction of the ventilation tunnel (for adjusting the distance from the side walls), the Y-axis corresponds to the front-to-back direction of the ventilation tunnel (for adjusting the distance from the front face), and the Z-axis corresponds to the vertical direction of the ventilation tunnel (for adjusting the suspension height).

[0035] The moving device 3 includes an X-axis moving device 31, a Z-axis moving device 32, and a Y-axis moving device 33. Figure 2 , which is a schematic diagram of the structure of the X-axis motion device of the present invention. The X-axis motion device 31 comprises multiple sets of X-axis dual slide rails 311 disposed within the ventilation tunnel 1, first and second pulleys 312 and 313 correspondingly disposed within each set of X-axis dual slide rails, a first rotation shaft 314 connecting the first and second pulleys 312 and 313, and a first drive device 315 connected to and located below the first rotation shaft 314.

[0036] In order to maintain the stability of the movement of the air duct, in the present invention, the X-axis double slide rails are at least two groups. In this embodiment, the X-axis double slide rails are three groups, which are evenly arranged along the length direction of the ventilation tunnel.

[0037] The first drive unit 315 rotates the first rotating shaft 314, thereby driving the first pulley 312 and the second slide 313 to move axially along the X-axis dual slide rails to change the distance between the air duct and the side wall. Specifically, the movement direction of the first and second pulleys is controlled by controlling the forward and reverse rotation of the motor of the first drive unit.

[0038] See also Figure 3 ,yes Figure 2 The schematic diagram of the first drive device in the X-axis moving device shown. In the present embodiment, the first drive device 315 includes a power supply, a voltage stabilizing module, a single-chip microcomputer electrically connected to the voltage stabilizing module, a motor drive electrically connected to the single-chip microcomputer, and a motor controlled by the motor drive. The power supply is a model aircraft battery, which has the advantages of large capacity and high output power and is suitable for high-power (motor 12V) equipment. The voltage stabilizing module converts the 12V voltage into 5V and provides it to the single-chip microcomputer. Since the IO port driving capacity of the single-chip microcomputer is limited (current is limited), it is necessary to add an additional motor drive to rotate the motor. The motor drive can increase the load capacity of the single-chip microcomputer, allowing the single-chip microcomputer to better control the motor. Therefore, after the single-chip microcomputer receives the control command, it immediately starts to operate the motor drive, and then implements effective control of the motor. In the present embodiment, the motor drive is an L298N motor drive.

[0039] In this embodiment, the first drive device 315 is connected to a mobile terminal via Bluetooth. The mobile terminal sends control instructions via Bluetooth, and the microcontroller receives the control instructions and effectively controls the motor. The mobile terminal can be a mobile phone, tablet, computer, etc.

[0040] See also Figure 4, is a schematic diagram of the structure of the Z-axis moving device of the present invention. The Z-axis moving device 32 is connected to the X-axis moving device 31 and includes a pulley fixture 321 connected to the first drive device 315, a Z-axis lifting pulley 322 mounted on the pulley fixture 321, a lifting rope 323 wound around the Z-axis lifting pulley 322, and a second drive device 324 for driving the Z-axis lifting pulley 322 to rotate and retract or release the lifting rope. The second drive device 324 operates to retract or release the lifting rope, thereby changing the hanging height of the wind tube. Specifically, the direction of movement of the lifting rope is controlled by controlling the forward and reverse rotation of the motor of the second drive device.

[0041] Corresponding to the X-axis double slide rails, in this embodiment, there are three groups of Z-axis moving devices, and the pulley fixing devices correspond one to one to the first driving devices.

[0042] The working principle of the second driving device 324 in this embodiment is the same as that of the first driving device, and is also connected to the mobile terminal via Bluetooth. The mobile terminal sends control instructions via Bluetooth, and the microcontroller effectively controls the motor after receiving the control instructions.

[0043] See also Figure 5 , is a schematic structural diagram of the Y-axis moving device in the present invention. The Y-axis moving device 33 is used to realize the forward and backward movement of the air duct in the length direction of the ventilation tunnel. The Y-axis moving device 33 is connected to the Z-axis moving device 31, which includes a Y-axis slide rail 331 connected to the lifting rope 323, a Y-axis pulley 332 provided on the head end of the Y-axis slide rail 331, and a third driving device 333 for driving the Y-axis pulley 332 to move along the Y-axis slide rail. The movement direction of the Y-axis pulley 332 is controlled by controlling the forward / reverse rotation of the motor of the third driving device. The air duct is connected to the Y-axis moving device 33, and the movement of the air duct in the X, Y and Z axis directions is realized through the X-axis moving device, the Z-axis moving device and the Y-axis moving device.

[0044] Based on actual research and production processes, it has been found that the distance the wind duct moves back and forth generally does not exceed 1 / 3 of the tunnel length. To maintain the stability of the wind duct suspension, in this embodiment, the Y-axis slide rail 331 is divided into two sections: a first Y-axis slide rail 3311 near the front end and a second Y-axis slide rail 3312 near the tunnel exit. The length of the first Y-axis slide rail 3311 is 1 / 3 of the ventilation tunnel length, and the length of the second Y-axis slide rail 3312 is 2 / 3 of the ventilation tunnel length. Because the Y-axis pulley 332 is located on the first Y-axis slide rail 3311, the maximum movement path of the Y-axis pulley is 1 / 3 of the ventilation tunnel length, thus satisfying the requirement that the distance the wind duct moves back and forth generally does not exceed 1 / 3 of the tunnel length.

[0045] The working principle of the third driving device 333 in this embodiment is the same as that of the first driving device, and is also connected to the mobile terminal via Bluetooth. The mobile terminal sends control instructions via Bluetooth, and the microcontroller effectively controls the motor after receiving the control instructions.

[0046] See also Figure 6 , is a schematic diagram of the connection between the Y-axis moving device and the wind duct suspension device in the present invention. In the present invention, the wind duct 2 is connected to the Y-axis moving device 33 through the wind duct suspension device 34. The wind duct suspension device 34 includes a first fixed portion 341 connected to the Y-axis pulley 332 and driven by the Y-axis pulley 332, a plurality of second fixed portions 342 fixed to the second Y-axis slide rail 3312, and a suspension member 343 connected to the first fixed portion 341 and the second fixed portion 342. The wind duct 2 is movably mounted on the suspension member 343. Specifically, the first fixed portion 341 is connected to the connecting shaft between the third driving device 333 and the Y-axis pulley 332, and its movement path is the same as the movement path of the Y-axis slide 332. Since the second fixed portion 342 is fixedly connected to the second Y-axis slide rail 3312, during the movement of the wind duct in the Y-axis direction, the second fixed portion and the suspension member connected thereto are fixed, that is, the suspension member connected to the second fixed portion plays the role of supporting the wind duct. When the Y-axis pulley 332 drives the first fixing portion to move, the hanging component connected to the first fixing portion drives the air tube to move, causing the air tube to slide inside the other hanging components.

[0047] In this embodiment, the number of Y-axis pulleys provided on the first Y-axis slide rail 3311 is at least two, and the number of second fixing portions is multiple and evenly distributed on the second Y-axis slide rail 3312 , making the operation more stable.

[0048] In this embodiment, the suspension member 343 is a circular collar through which the air duct passes, allowing for relative movement. When the third drive device 333 drives the Y-axis pulley 332, the Y-axis slides, driving the corresponding suspension member of the first fixed portion to move. The corresponding suspension member then lifts the air duct and moves it in the Y-axis direction.

[0049] The movement of the air duct on the X-axis, Y-axis and Z-axis is achieved through the X-axis moving device 31, the Z-axis moving device 32, the Y-axis moving device 33 and the air duct suspension device 34. Specifically, the movement principle of the air duct is as follows:

[0050] When the blower is moving only in the X-axis direction, the drive mechanisms of the Z-axis and Y-axis moving mechanisms are deactivated, leaving the corresponding pulleys in the same position. The first drive mechanism 315 is activated, driving the first and second pulleys of the X-axis moving mechanism to move in the X-axis direction. The Y-axis and Z-axis moving mechanisms then follow the movement of the first and second pulleys. The motor of the first drive mechanism rotates clockwise, moving the first and second pulleys to the right in the X-axis direction. Counterclockwise rotation of the motor drives the first and second pulleys to the left in the X-axis direction, thereby driving the blower in the X-axis direction.

[0051] When the fan is moving only in the Z-axis direction (i.e., up and down), the drives of the X- and Y-axis motion mechanisms stop, and the second drive mechanism activates, driving the Z-axis lifting pulley, thereby retracting or releasing the lifting rope wrapped around it. The second drive mechanism's motor rotates clockwise, retracting the rope on the Z-axis lifting pulley and causing the fan to move upward. Counterclockwise rotation of the second drive mechanism causes the Y-axis lifting pulley to release the rope, causing the fan to move downward.

[0052] When the air duct moves only in the Y-axis direction, the drives of the X-axis and Z-axis motion devices stop, and the third drive device is activated, driving the Y-axis pulley to slide along the Y-axis direction (i.e., the front-to-back direction of the ventilation tunnel). When the motor of the third drive device rotates clockwise, the Y-axis pulley moves forward, driving the air duct forward. When the motor of the third drive device rotates counterclockwise, the Y-axis pulley moves backward, driving the air duct backward.

[0053] When the fan moves simultaneously along the X, Y, and Z axes, the drives of the X-, Y-, and Z-axis moving devices operate simultaneously. Based on the actual adjustment of the fan, the motors of each drive device are controlled to rotate forward or reverse, enabling the fan to move freely left and right, up and down, and forward and backward in a similar model of dead-end tunnel ventilation. By controlling the motor speed, the fan's left and right, up and down, and forward and backward movement speeds are controlled, achieving precise control of the movement distance.

[0054] In order to achieve the overall inclination of the ventilation tunnel and thus simulate the working condition of the ventilation tunnel in an inclined state, a tilting device 4 for simulating an inclined tunnel is set at the bottom of the ventilation tunnel 1. Figure 7, is a schematic diagram of the connection between the tilting device and the ventilation tunnel in the present invention. The tilting device 4 includes a central axis support device 41 provided in a horizontal plane and used to support the middle part of the ventilation tunnel 1, and a telescopic device 42 provided at the bottom of the ventilation tunnel 1 and located at its end. The central axis support device 41 includes a central axis, two triangular supports provided on opposite sides of the central axis, one of the triangular supports is supported on a horizontal plane, and the other triangular support is connected to the bottom of the ventilation tunnel and can rotate relative to the central axis. The telescopic action of the telescopic device 42 drives the ventilation tunnel to tilt. At this time, the ventilation tunnel drives the triangular supports connected thereto to rotate relative to the central axis, thereby ensuring the stability of the ventilation tunnel when it tilts. In this embodiment, the telescopic device is an electric strut.

[0055] Specifically, the maximum inclination angle of the ventilation tunnel can be adjusted by adjusting the positions of the central axis support device 41 and the telescopic device 42. For example, a dead-end tunnel with a total length of 7 meters can be simulated using a similar experimental setup. By positioning the central axis support device 4 meters from the front face and the telescopic device 2 meters from the front face, and extending the telescopic device, the maximum inclination angle of the ventilation tunnel can be 15°, simulating an inclined tunnel in a real mine.

[0056] like Figure 1 As shown, the monitoring device 5 includes a sliding guide rail 51 provided on one side of the ventilation tunnel, a roller 52 cooperating with the sliding guide rail, a fourth driving device 53 driving the roller to slide along the sliding guide rail, a photographic device 54 driven by the roller to slide and used to record the image of the migration of the simulated medium, a data acquisition device 55 for detecting the working parameters and the concentration of the simulated medium in the ventilation tunnel, and a data processing device (not shown). The photographic device 54 and the data acquisition device 55 send the detection data to the data processing device for analyzing the migration law of the simulated medium.

[0057] In the present invention, the sliding guide rails 51 are dual-track rails to ensure the stability of the rollers. Four rollers 52 are connected together via a four-wheel alignment platform 56 to ensure consistent roller operation. A camera device 54 is supported and fixed to the four-wheel alignment platform 56 and driven by the rollers 52. During this motion, it records images of simulated medium particle migration within the ventilation tunnel and transmits the recorded data to a data processing device.

[0058] The data acquisition device includes multiple sensors for collecting operating parameters and simulated medium concentration within the ventilation tunnel and transmitting the collected data to a data processing device. The operating parameters include wind speed, wind pressure, temperature, and humidity. The simulated medium is dust and / or toxic gas. If the simulated medium is a colorless gas, the gas color can be added to facilitate recording its migration image. The data processing device analyzes the received simulated medium migration image, as well as data such as the operating parameters and simulated medium concentration within the ventilation tunnel, to determine the migration pattern of the simulated medium. In this embodiment, the data processing device can be a laboratory monitoring computer.

[0059] In the present invention, the fourth driving device is also connected to the mobile terminal for communication, and sends corresponding control instructions through the mobile terminal.

[0060] The following is a detailed description of the dead-end tunnel ventilation simulation experimental device of the present invention through specific embodiments.

[0061] Experimental design: The air duct is 0.198m away from the left side, 0.098m away from the roof, 0.6m away from the front face, and the tunnel is inclined at 5°. The working principle of the similar simulation experimental device for dead-end tunnel ventilation is as follows:

[0062] 1. Start the X-axis moving device, and through the first driving device, drive the first pulley and the second pulley to move along the X-axis double slide rail toward the left side of the tunnel model, so that the air duct is 0.198m away from the left side;

[0063] 2. Start the Z-axis moving device, and drive the Z-axis lifting pulley to rotate through the second driving device, driving the lifting rope to move up and down, so that the air duct is 0.098m away from the top plate;

[0064] 3. Start the Y-axis moving device and drive the Y-axis pulley to move forward and backward along the Y-axis through the third drive device, so that the wind tube is 0.6m away from the head surface;

[0065] 4. Drive the telescopic device of the tilting device to tilt the ventilation tunnel 5°;

[0066] 5. Dust is ejected from the front face of the ventilation tunnel and connected to the axial flow fan for ventilation and dust removal;

[0067] 6. Start the fourth driving device to drive the photographic device to move. As the dust migrates backward under the action of the wind flow, the photographic device moves synchronously and records the dust migration image in real time;

[0068] 7. The data acquisition device simultaneously collects data such as wind speed, wind pressure, temperature, humidity and dust concentration in the ventilation tunnel, and sends the data to the data processing device. The data processing device analyzes the migration pattern of dust based on the dust migration image and the working condition data in the ventilation tunnel.

[0069] The present invention provides a similar experimental device for cul-de-sac ventilation simulation. By providing X-axis, Y-axis, and Z-axis motion devices, the air duct can be freely adjusted in three dimensions: distance from the sidewall, hanging height, and distance from the front face. A tilting device allows the ventilation tunnel to be tilted at different angles to simulate an actual underground inclined tunnel. A monitoring device monitors the operating conditions within the ventilation tunnel and analyzes the migration patterns of the simulated medium. This device can effectively improve experimental efficiency and the accuracy of experimental data.

[0070] The embodiments of the present invention are described in detail above, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A similar simulation experimental device for dead-end tunnel ventilation, characterized in that: The device comprises a ventilation tunnel, a fan arranged in the ventilation tunnel, a moving device for driving the fan to move along the X-axis, Y-axis and Z-axis, a tilting device arranged at the bottom of the ventilation tunnel for simulating an inclined tunnel, and a monitoring device for analyzing the migration pattern of the simulated medium in the ventilation tunnel; The moving device includes an X-axis moving device, a Y-axis moving device, and a Z-axis moving device, wherein the X-axis moving device includes multiple sets of X-axis double slide rails provided in the ventilation tunnel, a first pulley and a second pulley corresponding to each set of X-axis double slide rails, a first rotating shaft connecting the first pulley and the second pulley, and a first driving device for driving the first rotating shaft; The Z-axis moving device is connected to the X-axis moving device, and includes a pulley fixing device connected to the X-axis moving device, a Z-axis lifting pulley provided on the pulley fixing device, a lifting rope wound around the Z-axis lifting pulley, and a second driving device for driving the Z-axis lifting pulley to rotate to realize the rope retraction / release of the lifting rope; The Y-axis moving device is connected to the Z-axis moving device, and includes a Y-axis slide rail connected to the lifting rope, a Y-axis pulley provided at the front end of the Y-axis slide rail, and a third driving device for driving the Y-axis pulley to move along the Y-axis slide rail; The wind duct is connected to the Y-axis moving device through a wind duct suspension device. The wind duct suspension device includes a first fixed part connected to the Y-axis pulley and driven by the Y-axis pulley, several second fixed parts fixed to the Y-axis slide rail near the tunnel exit end, and a suspension member connected to the first fixed part and the second fixed part. The wind duct is movably mounted on the suspension member.

2. The dead-end tunnel ventilation similarity simulation experimental device according to claim 1 is characterized in that: The Y-axis slide rail includes a first Y-axis slide rail close to the head end and a second Y-axis slide rail close to the tunnel exit end. The length of the first Y-axis slide rail is 1 / 3 of the length of the ventilation tunnel, and the length of the second Y-axis slide rail is 2 / 3 of the length of the ventilation tunnel.

3. The dead-end tunnel ventilation similarity simulation experimental device according to claim 1 is characterized in that: The suspension member is a collar, and the air duct passes through the collar. When the third driving device drives the Y-axis pulley to move, the Y-axis pulley drives the suspension member corresponding to the first fixing part to move, thereby realizing the movement of the air duct in the Y-axis direction.

4. The dead-end tunnel ventilation similarity simulation experimental device according to claim 1 is characterized in that: The tilting device includes a central axis supporting device arranged on a horizontal plane and used to support the middle of the ventilation tunnel, and a telescopic device arranged at the bottom of the ventilation tunnel, and the telescopic device drives the ventilation tunnel to tilt.

5. The dead-end tunnel ventilation similarity simulation experimental device according to claim 4 is characterized in that: The inclination angle of the ventilation tunnel is 0-15°.

6. The dead-end tunnel ventilation similarity simulation experimental device according to claim 1 is characterized in that: The monitoring device includes a sliding guide rail arranged on one side of the ventilation tunnel, a roller cooperating with the sliding guide rail, a fourth driving device driving the roller to slide along the sliding guide rail, a photographic device driven by the roller to slide and used to record the image of the migration of the simulated medium, a data acquisition device for detecting the working parameters and the concentration of the simulated medium in the ventilation tunnel, and a data processing device. The photographic device and the data acquisition device send the detection data to the data processing device for analyzing the migration law of the simulated medium.

7. The dead-end tunnel ventilation similarity simulation experimental device according to claim 6 is characterized in that: The working parameters include wind speed, wind pressure, temperature and humidity, and the simulated medium concentration is dust and / or toxic gas.

8. The similarity simulation experimental device for dead-end tunnel ventilation according to any one of claims 1 to 7, characterized in that: The first driving device, the second driving device and the third driving device are respectively connected to the mobile terminal for communication.

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