Experimental device for mining bladeless fan

Abstract

The utility model provides an experimental device for a mining bladeless fan, which comprises an air duct with an air inlet and an air outlet at two ends, and the mining bladeless fan is mounted in the air duct. The mining bladeless fan is connected with an air supply pipeline system for introducing compressed air with certain pressure into an air inlet chamber of the mining bladeless fan; an air inlet anemometer used for measuring the air inlet speed is arranged at an air inlet of the air duct, and an air outlet anemometer used for measuring the air outlet speed is arranged at an air outlet of the air duct. According to the utility model, the air inlet anemometer and the air outlet anemometer are arranged to measure the air speed at a certain position of the air duct, so that the air flow of the air duct is obtained, the air multiplication effect of the mining bladeless fan is further obtained, and the specific performance of the mining bladeless fan is known; in addition, according to the experiment device, initial inlet air is provided for the mining bladeless fan through the air supply pipeline system, the situation that electricity is inconvenient to use underground is simulated, and possibility is provided for the specific using mode of the mining bladeless fan in the mine.

Description

Technical Field

[0001] The utility model belongs to the field of fan performance testing, and in particular relates to an experimental device for a bladeless fan for mining. Background Art

[0002] The bladeless fan, also known as the air multiplier, was invented by British inventor James Dyson in 2009 and put into production. Its unique design and large air volume are favored by consumers. In addition to being used in life, the air multiplier can also be used in many other aspects based on its principle, including orchard wind-supplied spray systems, mosquito repellent and humidification, and multifunctional bladeless fans, as well as gas accumulation control in the upper corners of mines.

[0003] There are few existing experimental studies on the performance of bladeless mining fans. Most of them are simulation studies on the Coanda curvature of bladeless fans, that is, the width of the narrow slit of the air outlet. There is a lack of experimental equipment for studying the performance of bladeless mining fans, so it is impossible to provide corresponding data support for the actual use of bladeless mining fans in mines.

[0004] After searching, no similar technical solution to the present utility model has been disclosed. Utility Model Content

[0005] The utility model aims to solve the technical problems existing in the prior art and aims to provide an experimental device for a bladeless fan for mining.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an experimental device for a bladeless fan for mining, the bladeless fan for mining includes an air inlet chamber with an air inlet interface, and an annular fan frame with an annular air outlet slit connected to and communicated with the air inlet chamber, the experimental device includes a wind tube with an air inlet and an air outlet at two ends respectively, the bladeless fan for mining is installed in the wind tube, and the airflow discharged from the annular air outlet slit is toward the air outlet direction of the wind tube; the air inlet interface is connected to an air supply pipeline system located outside the wind tube, and the air supply pipeline system introduces compressed air of a certain pressure into the air inlet chamber through the air inlet interface; an air inlet anemometer for measuring its air inlet speed is provided at the air inlet of the wind tube, and an air outlet anemometer for measuring its air outlet speed is provided at the air outlet of the wind tube.

[0007] The above technical scheme measures the wind speed at a certain position of the wind duct by setting an inlet anemometer and an outlet anemometer to obtain the air flow of the wind duct, and then obtain the air multiplication effect of the mining bladeless fan, so as to understand the specific performance of the mining bladeless fan; and the experimental device uses the air supply pipeline system for the initial air intake of the mining bladeless fan, which is different from the feature of ordinary bladeless fans that can be used by plugging in. It simulates the situation of inconvenient electricity use underground to a certain extent, and provides a possibility for the specific use of mining bladeless fans in mines.

[0008] In a preferred embodiment of the present invention, the wind tube is also connected to a wind pressure meter for measuring the wind pressure inside the wind tube.

[0009] The above technical scheme, by setting up a wind pressure meter, enables the experimental device to also carry out wind pressure experiments inside the wind duct, and obtain the changes in wind pressure at different positions of the wind duct cross section when the mining bladeless fan is in operation; and based on the wind pressure, the Bernoulli equation can be used to calculate the wind speed at a certain point in the fluid, and the air volume of a certain cross section in the wind duct can also be calculated based on the wind speed.

[0010] In a preferred embodiment of the present utility model, the wind pressure meter is a Pitot tube wind pressure measuring instrument, and the air inlet end of the Pitot tube extends into the pressure measuring point in the wind cylinder.

[0011] The above technical solution adopts a Pitot tube wind pressure measuring instrument, and the air inlet end of the Pitot tube extends into the pressure measuring point in the wind duct. Therefore, there is no need to place the wind pressure meter in the wind duct, and the obstruction to the inlet and outlet airflow can be ignored, so as to improve the accuracy of wind pressure measurement.

[0012] In a preferred embodiment of the present utility model, a plurality of pressure measuring points are distributed in a matrix on the same cross section of the wind tube, and a wind pressure meter is used to measure the wind pressure at each pressure measuring point.

[0013] The above technical solution sets multiple pressure measuring points to obtain an average value, thereby making the results of wind speed and air volume more accurate.

[0014] In a preferred embodiment of the utility model, a noise meter for measuring the operating noise of the mining bladeless fan is also provided in or outside the wind tube.

[0015] The above technical solution, by setting up a noise meter, enables the experimental device to also carry out noise experiments, and uses the noise meter to measure the noise level generated during the operation of the mining bladeless fan.

[0016] In another preferred embodiment of the present invention, the air cylinder comprises a cylinder frame, and a side wall made of a plastic film wrapped outside the cylinder frame.

[0017] In the above technical solution, the air duct is made of a duct frame and a plastic film, which has low cost and is convenient for moving the positions of the pressure measuring point and the speed measuring point.

[0018] In another preferred embodiment of the present invention, the cross-section of the wind tube is rectangular, the length, width and height of the wind tube are 2.5m*0.6m*1.0m, and the mining bladeless fan is 0.5m away from the air inlet.

[0019] In another preferred embodiment of the present utility model, the anemometer is a vane-type anemometer, and the wind measuring probe of the anemometer is retractable.

[0020] In the above technical solution, the wind measuring probe of the anemometer is retractable, which effectively increases the measuring distance and makes the measurement more convenient. Moreover, the obstruction to the inflow and outflow of wind can be ignored, which can improve the accuracy of wind speed measurement.

[0021] In another preferred embodiment of the utility model, the air supply pipeline system includes an air supply pipeline connected to and communicating with the air inlet interface, and an air compressor connected to the air inlet of the air supply pipeline. The air supply pipeline is also provided with a pressure regulating valve, a pipeline pressure gauge and a shut-off valve.

[0022] In the above technical solution, the air compressor is used to generate compressed air, the pressure regulating valve is used to adjust the pressure of the compressed air transported by the air supply pipeline, and the pipeline pressure gauge is used to measure the pressure of the compressed air transported by the air supply pipeline so that the pressure entering the air inlet chamber reaches a preset value.

[0023] In another preferred embodiment of the utility model, an air storage tank connected to the air outlet of the air compressor is further provided on the air supply pipeline, and the air storage tank has a gas tank pressure gauge for measuring the pressure therein.

[0024] In the above technical solution, the air storage tank plays a role of pressure stabilization and buffering, so that the airflow entering the air inlet chamber is stable.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 It is a structural schematic diagram of an experimental device of a bladeless fan for mining according to an embodiment.

[0028] Figure 2 It is a wind speed measurement diagram in which nine speed measuring points are arranged on the cross section of the wind tube to measure the wind speed.

[0029] Figure 3 It is a wind pressure measurement diagram in which nine pressure measuring points are arranged on the cross section of the wind duct to measure the wind pressure.

[0030] Figure 4 This is a schematic diagram of the application scenario of the mining bladeless fan in the upper corner of the coal mine.

[0031] Figure 5 This is a schematic diagram of the application scenario of mining bladeless fans in high-ceiling areas underground in coal mines.

[0032] The figure marks in the drawings of the specification include: a bladeless mining fan 10, an air inlet chamber 11, an annular fan frame 12, a wind tube 20, an air inlet 21, an air outlet 22, an air inlet anemometer 30, an air outlet anemometer 40, an air pressure meter 50, a Pitot tube 51, a noise meter 60, an air supply pipeline 71, an air compressor 72, a pressure regulating valve 73, a pipeline pressure gauge 74, a stop valve 75, an air storage tank 76, and an air tank pressure gauge 77. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0036] The utility model provides an experimental device for a bladeless fan for mining, such as Figure 1 As shown, the mining bladeless fan 10 includes an air inlet chamber 11 with an air inlet interface, and an annular fan frame 12 connected to and in communication with the air inlet chamber 11 and having an annular air outlet slit. The experimental device includes a wind tube 20 with an air inlet 21 and an air outlet 22 at both ends, and the mining bladeless fan 10 is installed in the wind tube 20, and the airflow discharged from the annular air outlet slit of the annular fan frame 12 is directed toward the air outlet 22 of the wind tube 20. The air inlet interface of the air inlet chamber 11 is connected to an air supply pipeline system located outside the wind tube 20, and the air supply pipeline system introduces compressed air of a certain pressure into the annular fan frame 12 through the air inlet chamber 11. An air inlet anemometer 30 for measuring the air inlet velocity is provided at the air inlet 21 of the wind tube 20, and an air outlet anemometer 40 for measuring the air outlet velocity is provided at the air outlet 22 of the wind tube 20.

[0037] The air supply pipeline system includes an air supply pipeline 71 connected and communicated with the air inlet interface of the air inlet chamber 11, and an air compressor 72 connected to the air inlet of the air supply pipeline 71. The air supply pipeline 71 is provided with a pressure regulating valve 73, a pipeline pressure gauge 74 and a stop valve 75 in sequence. Preferably, the air supply pipeline 71 uses a mine-use straight-through quick-connect high-pressure ventilation pipeline, which has the advantages of explosion-proof, high pressure resistance, and easy installation; the air compressor 72 uses a screw air compressor produced by Shanghai Kangkeer Compressor Co., Ltd., which is a silent box compressor with low noise interference, which is conducive to the subsequent noise monitoring experiment; the pressure regulating valve 73 uses an AIRTAC air source processor pressure regulating valve 73, which is easy to install; and the stop valve 75 is a ball valve. Preferably, the air supply pipeline 71 is also provided with an air storage tank 76 connected to the air outlet of the air compressor 72, and the air storage tank 76 has a gas tank pressure gauge 77 for measuring the pressure inside it. The air storage tank 76 uses a high-pressure air storage tank produced by Nantong Jiaji Machinery Co., Ltd.

[0038] Before the experiment, the experimental device needs to be tested. First, close the stop valve 75, start the air compressor 72 to preheat for ten minutes, and store the compressed air in the air tank 76. Adjust the output air pressure of the air compressor 72 to 0.75Mpa (need to reach 0.5Mpa or above to ensure the air pressure required for the experiment), and check whether the reading of the air tank pressure gauge 77 also reaches 0.75Mpa. When the air compressor 72 is running, the reading of the air tank pressure gauge 77 gradually rises to 0.75Mpa, indicating that the production of high-pressure air by the air compressor 72 and the storage of high-pressure air by the air tank 76 are normal. Open the stop valve 75, and the pipeline pressure gauge 74 shows an air pressure of 0.75Mpa in the pipeline, indicating that the air supply pipeline 71 of the experimental system is unobstructed and there is no air leakage. Release the cap lock of the pressure regulating valve 73, and adjust the output air pressure counterclockwise to the required value. It can be observed that the reading of the pipeline pressure gauge 74 changes to the required air pressure value, indicating that the pressure regulating valve 73 is normal.

[0039] During the experiment, the air compressor 72 is turned on, and the air pressure entering the air inlet chamber 11 of the mining bladeless fan 10 is controlled to be 0.3Mpa through the pressure regulating valve 73. The mining bladeless fan 10 is running to generate airflow in the wind tube 20. The cross section of the air inlet 21 and the air outlet 22 of the wind tube 20 is selected, and nine speed measurement points are evenly selected in each cross section. The wind speed of each speed measurement point is measured using the air inlet anemometer 30 and the air outlet anemometer 40 (collectively referred to as anemometers). The cross section wind speed measurement diagram is shown in the attached figure. Figure 2As shown, by calculating the average wind speed of the cross section and combining it with the cross-sectional area of ​​the wind duct 20, the air flow rates at the air inlet 21 and the air outlet 22 of the wind duct 20 when the mining bladeless fan 10 is in operation are obtained (the specific formula for calculating the air flow rate is common knowledge in the art and will not be described in detail here). Based on the relationship between the air flow rate entering the air inlet 21 and the air flow rate output from the air outlet 22, the air multiplication effect of the mining bladeless fan 10 is obtained.

[0040] During the experiment, the initial air intake of the bladeless fan 10 for mining uses the air compressor 72 of the air supply pipeline system as the power source. In the subsequent air intake process, since the air compressor 72 is connected to the air storage tank 76, it can meet the sudden and instantaneous increase in the air consumption of the bladeless fan 10 for mining in the experiment, so that the air intake pressure and air intake volume remain stable, and then the air outlet air flow is continuous, eliminating the pulsation of the air flow in the pipeline, and ensuring that the air outlet of the bladeless fan for mining is more stable during the experiment. After the air intake airflow passes through the airflow amplification structure inside the bladeless fan 10 for mining, the air outlet airflow flow is doubled to meet the use requirements. During the experiment, the air compressor 71 is continuously maintained as the air intake power source to ensure smooth air intake. When the bladeless fan 10 for mining is used in a mine, the underground pressure air source equipment can be used instead of the air compressor 72 to perform the initial air intake on the bladeless fan 10 for mining, so that the air intake volume is continuous, and at the same time, after the action of the bladeless fan 10 for mining, a larger air outlet airflow is generated.

[0041] In the utility model, the mining bladeless fan 10 is made of steel as a whole, the air inlet chamber 11 is a hollow cuboid with a length of 94 mm, a width of 54 mm, and a height of 100 mm, and the air inlet interface is a circular opening with a diameter of 30 mm provided on the side of the air inlet chamber 11 for access to the air supply pipe 71. The annular fan frame 12 is located below the air inlet chamber 11, and the annular fan frame 12 is a rectangular frame, the outer frame of the rectangular frame is 700 mm long and 400 mm wide, and the inner frame is 660 mm long and 360 mm wide.

[0042] In the present invention, the cross section of the wind tube 20 is rectangular, the length, width and height of the wind tube 20 are 2.5m*0.6m*1.0m, and the distance between the mining bladeless fan 10 and the air inlet 21 is 0.5m, and the distance between the mining bladeless fan 10 and the air outlet 22 is 2m. Specifically, the wind tube 20 includes a tube frame and a side wall made of plastic film wrapped outside the tube frame. The tube frame is connected by punching angle steel. Angle steels with a thickness of 1.5m and a length of 1.0m and 0.6m are selected to build a rectangular parallelepiped tube frame. The outer periphery of the tube frame is wrapped with plastic film, and finally the wind tube 20 is built.

[0043] In the utility model, the inlet anemometer 30 and the outlet anemometer 40 are both Xima AR856 model impeller anemometers, which are digital wind speed and air volume meters. The wind measuring probe connected to the handle is retractable and can be stretched to 365mm, which effectively increases the measuring distance and makes the measurement more convenient. At the same time, when measuring the cross-sectional wind speed of the air inlet 21 and the air outlet 22 of the wind tube 20, the diameter of the stretching section of the anemometer handle is relatively small, and the obstruction to the inlet and outlet air flows can be ignored, which can improve the accuracy of wind speed measurement.

[0044] like Figure 1 As shown, in another preferred embodiment, the wind duct 20 is also connected to a wind pressure meter 50 for measuring the wind pressure inside the wind duct 20, so as to conduct a wind pressure test inside the wind duct 20. The wind pressure meter 50 is a pitot tube wind pressure measuring instrument, preferably a DP2000 high temperature resistant intelligent digital pitot tube wind pressure measuring instrument, the air inlet end of the pitot tube 51 extends into the pressure measuring point in the wind duct 20, and the pressure measuring point is located downstream of the mining bladeless fan 10. The specific installation and connection method of the wind pressure meter 50 is the existing technology and will not be described in detail here.

[0045] like Figure 3 As shown, it is preferred that multiple pressure measuring points, such as nine pressure measuring points, are distributed in a matrix on the same cross section of the wind duct 20, and the wind pressure meter 50 is used to measure the wind pressure at each pressure measuring point. Specifically, when conducting the wind pressure test inside the wind duct 20, cross sections with the same spacing and different positions of the wind duct 20 are selected, nine pressure measuring points are selected at the cross sections, and the wind pressure meter 50 is used to measure the wind pressure at each pressure measuring point. The cross section wind pressure measurement diagram is shown in the attached figure. Figure 3 As shown, the wind pressure changes at different positions of the cross section of the wind tube 20 when the mining bladeless fan 10 is running are obtained.

[0046] It should be noted that, according to the wind pressure, the Bernoulli equation can also be used to calculate the wind speed at a certain point in the fluid; after measuring the wind speed at multiple points and obtaining the average wind speed, the wind volume at a certain cross section in the wind tube 20 can also be calculated. Preferably, the measured gas flow rate and wind volume can be directly read by setting a controller and a display device.

[0047] like Figure 1 As shown, in another preferred embodiment, a noise meter 60 for measuring the operating noise of the mining bladeless fan 10 is further provided in the wind tube 20 or outside the wind tube 20 to perform a noise test experiment. When performing the noise test experiment, the noise meter 60 is used to measure the noise value generated during the operation of the mining bladeless fan 10 to analyze the noise situation in the wind tube 20.

[0048] The utility model measures the wind speed, wind pressure and noise value at a certain position of the wind tube 20 by setting an anemometer (including an inlet anemometer 30 and an outlet anemometer 40), an air pressure meter 50 and a noise meter 60, and obtains the air flow in the wind tube 20, and then obtains the air multiplication effect of the mining bladeless fan 10, so as to understand the specific performance of the mining bladeless fan 10, and lay a good foundation for the specific use of the mining bladeless fan 10 in the mine. In the experiment, it is also possible to manufacture mining bladeless fans 10 of various specifications, replace the specifications of the mining bladeless fans 10 in the wind tube 20, compare the air multiplication effects of the mining bladeless fans 10 of different specifications, and select the optimal specifications.

[0049] The bladeless fan 10 for mining can be mainly used for the control of mine gas. After comprehensive consideration of the gas accumulation location and the difficulty of control, two scenes, the upper corner and the high top area of ​​Yuwu Coal Mine, were mainly selected for field experiments.

[0050] like Figure 4 As shown in the figure, the upper corner of the mine refers to the return air side of the coal mining face, and the triangular area close to the upper wall of the return air roadway and the edge of the goaf. This area often gathers a lot of gas during coal mining, which brings hidden dangers to the safe production of the mine and also seriously restricts the efficient development of the mining work. Figure 4 The arrangement is carried out in a manner, combined with the gas distribution in the upper corner of the N2205 working face underground, and the specific test positions are distributed in the middle column of the support, the rear column of the support and the cutting top line position (the specific arrangement position of the cutting top line is 50 to 100 cm outside the front column of the frontmost support, and the mining bladeless fan 10 is installed vertically upward, about 10 cm away from the top plate position; the specific position of the middle column of the support is arranged in the middle beam of the support and its left and right pillars; the specific arrangement position of the rear column of the support is at the three pillars at the end), and a test point is set every 70 cm at each test position (this distance is obtained based on the distance between the hydraulic pillars in the upper corner), and each position is tested at least four times. The gas concentration within a certain range of the mining bladeless fan 10 is recorded at different positions, and the gas control effect is best, indicating that the mining bladeless fan 10 is best at this position.

[0051] In the process of tunneling, the top coal in the high roof area becomes soft and slides down. Due to poor ventilation, this area is prone to local gas accumulation. At present, most mines in my country generally adopt methods such as increasing air volume dilution and high-top drilling to control gas accumulation in the high roof area. Figure 5As shown, a bladeless fan 10 can be installed at the location of the roof collapse zone or the crack zone, and the bladeless fan 10 can lead the fresh airflow to the accumulation location for dilution treatment. At least four test points are set before and after the collapse zone (each test point is 80 cm apart), and the airflow direction is controlled by adding a conical mouth to increase the air volume, and the gas control effect is further enhanced by pressing into the wind tube and installing branches to ensure safe production at the working face.

[0052] In the description of this specification, the description with reference to the terms "preferred embodiment", "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An experimental device for a bladeless fan for mining, the bladeless fan for mining comprising an air inlet chamber having an air inlet interface, and an annular fan frame having an annular air outlet slit connected and communicated with the air inlet chamber, characterized in that: The experimental device comprises a wind tube with an air inlet and an air outlet at two ends respectively, the mining bladeless fan is installed in the wind tube, and the airflow discharged from the annular air outlet slot is directed toward the air outlet of the wind tube; The air inlet interface is connected to an air supply pipeline system located outside the air duct, and the air supply pipeline system introduces compressed air of a certain pressure into the air inlet chamber through the air inlet interface; An inlet anemometer for measuring the inlet wind speed is provided at the air inlet of the wind duct, and an outlet anemometer for measuring the outlet wind speed is provided at the air outlet of the wind duct.

2. The experimental device of a bladeless fan for mining according to claim 1 is characterized in that: The wind tube is also connected with a wind pressure meter for measuring the wind pressure inside the wind tube.

3. The experimental device of a bladeless fan for mining according to claim 2 is characterized in that: The wind pressure meter is a Pitot tube wind pressure measuring instrument, and the air inlet end of the Pitot tube extends into the pressure measuring point in the wind tube.

4. The experimental device of a bladeless fan for mining according to claim 2 is characterized in that: A plurality of pressure measuring points are distributed in a matrix on the same cross section of the wind duct, and a wind pressure meter is used to measure the wind pressure at each pressure measuring point.

5. The experimental device of a bladeless fan for mining according to claim 1 is characterized in that: A noise meter for measuring the running noise of the mining bladeless fan is also arranged in or outside the wind tube.

6. An experimental device for a bladeless fan for mining according to any one of claims 1 to 5, characterized in that: The air cylinder comprises a cylinder frame and a side wall made of a plastic film and wrapped outside the cylinder frame.

7. An experimental device for a bladeless fan for mining according to any one of claims 1 to 5, characterized in that: The cross-section of the wind duct is rectangular, the length, width and height of the wind duct are 2.5m*0.6m*1.0m, and the mining bladeless fan is 0.5m away from the air inlet.

8. An experimental device for a bladeless fan for mining according to any one of claims 1 to 5, characterized in that: The anemometer is a vane-type anemometer, and the wind measuring probe of the anemometer is retractable.

9. An experimental device for a bladeless fan for mining according to any one of claims 1 to 5, characterized in that: The air supply pipeline system includes an air supply pipeline connected to and communicating with the air inlet interface, and an air compressor connected to the air inlet of the air supply pipeline. The air supply pipeline is also provided with a pressure regulating valve, a pipeline pressure gauge and a stop valve.

10. The experimental device for a bladeless fan for mining according to claim 9, characterized in that: The air supply pipeline is also provided with an air storage tank connected to the air outlet of the air compressor, and the air storage tank has an air tank pressure gauge for measuring the pressure inside the air storage tank.

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