Intelligent coal caving dust concentration detection experimental device and experimental method

Abstract

The invention discloses an intelligent coal caving dust concentration detection experiment device and method, and particularly relates to the technical field of coal mine engineering, the intelligent coal caving dust concentration detection experiment device comprises a box body, and the box body is provided with an air inlet and an air outlet which are communicated with the outside; a plurality of intelligent coal caving hydraulic support models are arranged in the box body side by side; the plurality of dust release devices are uniformly arranged on the box body and are used for releasing quantitative dust into the box body; the plurality of spraying devices are uniformly arranged on the box body and are used for spraying water mist into the box body; the plurality of dust concentration detection devices are uniformly arranged on the box body and are used for detecting the dust concentration in the box body; and the dust release device, the spraying device and the dust concentration detection device are all in signal connection with the control system. According to the invention, proper positions of the camera and the light supplement lamp on the support connecting rod can be determined, dust attachment of the camera is reduced, and smooth coal flow image acquisition and coal gangue identification are ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine engineering, and in particular to an intelligent coal discharge dust concentration detection experimental device and an experimental method. Background Art

[0002] Intelligent top coal caving (intelligent coal caving) is an advanced technology in the field of coal mining. It means that when caving coal, the camera collects images of the coal flow on the rear scraper conveyor to complete the identification of coal and gangue in the image. The camera and fill light need to be placed at the appropriate position of the rear connecting rod of the bracket. However, there is always a lot of dust in each production process of the fully-mechanized top coal caving working face. The free dust in the air blocks the propagation of light, and some dust will adhere to the lens surface of the camera, seriously affecting the collection of coal flow images on the rear scraper, and hindering the pace of coal gangue identification. Therefore, there is an urgent need for an experimental platform and experimental method to calculate the dust concentration change before / after spray dust reduction in the intelligent fully-mechanized top coal caving working face, analyze the location of the low-concentration area of ​​dust after dust reduction, and pave the way for the reasonable placement of cameras and fill lights in the subsequent intelligent top coal caving mining process. Summary of the invention

[0003] The purpose of the present invention is to provide an intelligent coal dust concentration detection experimental device and experimental method to solve the problems existing in the above-mentioned prior art, and to determine the appropriate position of the camera and the fill light on the rear connecting rod of the bracket, reduce dust adhesion on the camera, and ensure the smooth acquisition of coal flow images and coal gangue identification.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides an intelligent coal-laying dust concentration detection experimental device, comprising: a box body, comprising a top plate, a bottom plate, a first side plate, a second side plate, a third side plate and a fourth side plate, wherein the first side plate is provided with an air inlet connected to the outside, and the second side plate is provided with an air outlet connected to the outside; an intelligent coal-laying hydraulic support model, wherein the number of the intelligent coal-laying hydraulic support models is multiple, and the multiple intelligent coal-laying hydraulic support models are placed side by side in the box body; a dust release device, wherein the number of the dust release devices is multiple, and the multiple dust release devices are evenly arranged on the top plate, the third side plate and the fourth side plate. The fourth side plate is used to release a certain amount of dust into the box; a spray device, there are multiple spray devices, and the multiple spray devices are evenly arranged on the top plate and the third side plate, and are used to spray water mist into the box; a dust concentration detection device, there are multiple dust concentration detection devices, and the multiple dust concentration detection devices are evenly arranged on the top plate, the third side plate and the fourth side plate, and are used to detect the dust concentration in the box; a control system, the dust release device, the spray device and the dust concentration detection device are all connected to the control system signal.

[0006] Preferably, a blower is further included, the blower is connected to the air inlet through a pipeline, and is used to transport air into the box, and the blower is connected to the control system signal.

[0007] Preferably, it also includes a dust collection box, which is connected to the air outlet through a pipeline and is used to collect dust in the box.

[0008] Preferably, a coal body model is provided in the box body, and the coal body model is placed at an angle between the top plate and the third side plate.

[0009] Preferably, the intelligent coal placing hydraulic support model includes a base, a top beam, a shield beam, a column, a front connecting rod, a rear connecting rod, a camera, a fill light, a guard plate, a front beam, a tail beam, a plug plate and a rear scraper. The base is placed on the bottom plate, the base is fixedly connected to the top beam through the column, the base is fixedly connected to the shield beam through the front connecting rod and the rear connecting rod, the camera and the fill light are both fixed on the rear connecting rod, the top beam is fixedly connected to the shield beam, and there is a certain angle between the top beam and the shield beam. One end of the front beam is fixedly connected to the top beam, the other end of the front beam is fixedly connected to the guard plate, the top beam and the front beam are both in contact with the top plate, the guard plate is in contact with the fourth side plate, one end of the tail beam is fixedly connected to the shield beam, and a certain angle is formed between the tail beam and the shield beam, the shield beam and the tail beam are both in contact with the coal body model, the other end of the tail beam is fixedly connected to the plug plate, the rear scraper is connected to the base through a telescopic rod, and the rear scraper can be in contact with the third side plate.

[0010] Preferably, the box is made of acrylic board.

[0011] Preferably, the dust concentration detection device comprises a probe and a telescopic rod, the probe is fixedly connected to the telescopic rod, and the probe is signal-connected to the control system.

[0012] Preferably, the intelligent coal caving hydraulic support model is made of acrylic board.

[0013] The present invention also provides a detection method using the intelligent coal dust concentration detection experimental device, comprising the following steps:

[0014] Step 1: Check the sealing of the box, then open the air inlet and the air outlet, and use a blower to pre-ventilate the box through the air inlet for 20 minutes to discharge other impurities in the box;

[0015] Step 2: After the impurities are discharged, regular air with a certain wind speed is introduced into the box again through the air inlet;

[0016] Step 3, continuously releasing a certain mass concentration of dust into the box through the dust release device, so that the dust fills the entire box;

[0017] Step 4: After ventilation for a period of time, the control system controls the dust concentration detection device to detect the dust concentration at different positions in the box, and transmits the detection results to the control system;

[0018] Step 5, the control system controls the spray device to spray dust on the box body. After the spraying is completed, the control system controls the dust concentration detection device again to detect the dust concentration after the spraying, and transmits the detection result to the control system;

[0019] Step 6, the control system analyzes the dust concentration data before and after the spraying, determines the low dust concentration position area of ​​the connecting rod of the intelligent coal caving hydraulic support model where the camera is installed, and determines the installation position of the camera;

[0020] Step seven, after the experiment is completed, close the dust release device and discharge the dust in the box through the air outlet.

[0021] Preferably, in step 4, by adjusting the length of the dust concentration detection device extending into the box, the dust concentration at different depths in the box can be detected.

[0022] Compared with the prior art, the present invention has achieved the following technical effects:

[0023] The present invention provides an intelligent coal caving dust concentration detection experimental device and an experimental method, wherein a plurality of intelligent coal caving hydraulic support models are placed in a box body, dust is released into the box body by a dust releasing device, a coal mining environment is simulated, dust reduction treatment is performed by a spray device, and the dust concentration before / after spray dust reduction can be detected by a dust concentration detection device, and the dust concentration change is calculated, and the position of the low dust concentration area of ​​the intelligent coal caving hydraulic support model after dust reduction is analyzed and determined according to the dust concentration change data near each intelligent coal caving hydraulic support model detected by the dust concentration detection device, so as to facilitate the subsequent reasonable placement of cameras and fill lights in the intelligent mining process of top coal caving; and according to the dust concentration data after dust reduction, suitable respiratory protection equipment can be provided for operators, thereby reducing the harm of dust to workers and providing guarantee for the safe production of the working face. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. 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 paying creative work.

[0025] Figure 1 This is a schematic diagram of the intelligent coal dust concentration detection experimental device;

[0026] Figure 2 This is an internal cross-sectional view of the intelligent coal dust concentration detection experimental device;

[0027] Figure 3A side view of the intelligent coal dust concentration detection experimental device without the first side plate and the second side plate;

[0028] Figure 4 This is a structural schematic diagram of the intelligent coal-laying hydraulic support model.

[0029] In the figure: 1- intelligent coal-laying hydraulic support model; 2- top plate; 3- fourth side plate; 4- bottom plate; 5- third side plate; 6- first side plate; 7- second side plate; 8- coal body model; 9- dust release device; 10- dust concentration detection device; 11- spray device; 12- air inlet; 13- blower; 14- air outlet; 15- dust collection box; 16- base; 17- top beam; 18- shield beam; 19- column; 20- front connecting rod; 21- rear connecting rod; 22- camera; 23- fill light; 24- guard plate; 25- front beam; 26- tail beam; 27- plug plate; 28- rear scraper. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] The purpose of the present invention is to provide an intelligent coal dust concentration detection experimental device and experimental method to solve the problems existing in the above-mentioned prior art, and to determine the appropriate position of the camera and the fill light on the rear connecting rod of the bracket, reduce dust adhesion on the camera, and ensure the smooth acquisition of coal flow images and coal gangue identification.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] This embodiment provides an intelligent coal dust concentration detection experimental device. Figure 1-3As shown, it includes: a box body, including a top plate 2, a bottom plate 4, a first side plate 6, a second side plate 7, a third side plate 5 and a fourth side plate 3, the first side plate 6 is provided with an air inlet 12 connected to the outside, and the second side plate 7 is provided with an air outlet 14 connected to the outside; an intelligent coal-laying hydraulic support model 1, the number of the intelligent coal-laying hydraulic support models 1 is multiple, and the multiple intelligent coal-laying hydraulic support models 1 are placed side by side in the box body; a dust release device 9, the number of the dust release device 9 is multiple, and the multiple dust release devices 9 are evenly arranged on the top plate 2, the third side plate 5 and the fourth side plate 3, for releasing a certain amount of dust into the box; a spray device 11, the number of the spray devices 11 is multiple, and the multiple spray devices 11 are evenly arranged on the top plate 2 and the third side plate 5, for spraying water mist into the box; a dust concentration detection device 10, the number of the dust concentration detection device 10 is multiple, and the multiple dust concentration detection devices 10 are evenly arranged on the top plate 2, the third side plate 5 and the fourth side plate 3, for detecting the dust concentration in the box; a control system, the dust release device 9, the spray device 11 and the dust concentration detection device 10 are all connected to the control system signal. A plurality of intelligent coal-laying hydraulic support models 1 are placed in a box body, and dust is released into the box body through a dust release device 9 to simulate a coal mining environment. Dust reduction treatment is performed through a spray device 11. The dust concentration before / after spray dust reduction can be detected by a dust concentration detection device 10, and the dust concentration change is calculated. According to the dust concentration change data near each intelligent coal-laying hydraulic support model 1 detected by the dust concentration detection device 10, the position of the low-concentration dust area of ​​the intelligent coal-laying hydraulic support model 1 after dust reduction is analyzed and determined, so as to facilitate the subsequent reasonable placement of the camera 22 and the fill light 23 in the intelligent mining process of top coal caving, reduce the situation where free dust blocks the propagation of light in the air, and some dust will adhere to the lens surface of the camera 22, so as to ensure the smooth collection of coal flow images and coal gangue identification on the rear scraper; and according to the dust concentration data after dust reduction, suitable respiratory protection equipment can be provided for the operating personnel, so as to reduce the harm of dust to workers and provide guarantee for the safe production of the working face.

[0035] It is further preferred in the implementation manner of this embodiment that the intelligent coal dust concentration detection experimental device also includes a blower 13, the blower 13 is connected to the air inlet 12 through a pipeline, and is used to transport air into the box. The blower 13 is connected to the control system signal.

[0036] In the implementation of this embodiment, it is further preferred that the intelligent coal dust concentration detection experimental device further includes a dust collection box 15, which is connected to the air outlet 14 through a pipeline and is used to collect dust in the box. The dust collection box 15 recycles dust and can reduce pollution to the external environment.

[0037] In the implementation of this embodiment, it is further preferred that a coal body model 8 is provided in the box, and the coal body model 8 is placed at the angle between the top plate 2 and the third side plate 5. The coal body model 8 is composed of a dark solid material, which can reduce the cost.

[0038] In the implementation of this embodiment, it is further preferred that Figure 4 As shown, the intelligent coal-laying hydraulic support model 1 includes a base 16, a top beam 17, a shielding beam 18, a column 19, a front connecting rod 20, a rear connecting rod 21, a camera 22, a fill light 23, a guard plate 24, a front beam 25, a tail beam 26, a plug plate 27, and a rear scraper 28. The base 16 is placed on the bottom plate 4, the base 16 is fixedly connected to the top beam 17 through the column 19, the base 16 is fixedly connected to the shielding beam 18 through the front connecting rod 20 and the rear connecting rod 21, the camera 22 and the fill light 23 are both fixed on the rear connecting rod 21, the top beam 17 is fixedly connected to the shielding beam 18, and the top beam 17 and the shielding beam 18 are fixedly connected. There is a certain angle between them, one end of the front beam 25 is fixedly connected to the top beam 17, the other end of the front beam 25 is fixedly connected to the guard plate 24, the top beam 17 and the front beam 25 are both in contact with the top plate 2, the guard plate 24 is in contact with the fourth side plate 3, one end of the tail beam 26 is fixedly connected to the shield beam 18, and there is a certain angle between the tail beam 26 and the shield beam 18, the shield beam 18 and the tail beam 26 are both in contact with the coal body model 8, the other end of the tail beam 26 is fixedly connected to the plug plate 27, the rear scraper 28 is connected to the base 16 through a telescopic rod, and the rear scraper 28 is located on the bottom plate 4 and can be in contact with the third side plate 5. The dust release device 9 can store and release dust. The dust release device 9 fixed on the top of the box can release dust into the box through the top plate 2 of the box and the top beam 17 of the intelligent coal-discharging hydraulic support model 1. The dust release device 9 fixed on the third side plate 5 and the fourth side plate 3 of the box can release dust into the box through the third side plate 5 and the fourth side plate 3 of the box. The spray device 11 includes a nozzle, a water pipe and a water tank. The nozzle is connected to the water tank outside the box through the water pipe. The water pipe of the spray device 11 fixed on the top of the box can pass through the top plate 2 of the box and the front beam 25 of the intelligent coal-discharging hydraulic support model 1 to spray water into the box to reduce dust. The water pipe of the spray device 11 fixed on the third side plate 5 of the box can pass through the third side plate 5 of the box, the coal body model 8 and the tail beam 26 to spray water into the box to reduce dust.

[0039] In the implementation of this embodiment, it is further preferred that the material of the box body is an acrylic plate, and the material of the intelligent coal-laying hydraulic support model 1 is an acrylic plate. The acrylic plate can reduce the weight and manufacturing cost of the experimental platform.

[0040] It is further preferred in the implementation of this embodiment that the dust concentration detection device 10 includes a probe and a telescopic rod, the probe is fixedly connected to the telescopic rod, and the probe is connected to the control system signal. The telescopic rod of the dust concentration detection device 10 fixed on the top of the box can extend into the box through the top plate 2 of the box and the top beam 17 of the intelligent coal-releasing hydraulic support model 1; the telescopic rod of the dust concentration detection device 10 fixed on the third side plate 5 of the box can extend into the box through the third side plate 5 of the box, or through the third side plate 5 of the box, the coal body model 8 and the tail beam 26 of the box; the dust release device 9 fixed on the fourth side plate 3 of the box can extend into the box through the fourth side plate 3 of the box; by adjusting the length of the telescopic rod, the dust concentration data at different depths in the box can be detected.

[0041] Example 2

[0042] This embodiment provides a detection method of the intelligent coal dust concentration detection experimental device of embodiment 1, comprising the following steps:

[0043] Step 1: Check the tightness of the box, then open the air inlet 12 and the air outlet 14, and use the blower 13 to pre-ventilate the box from the air inlet 12 for 20 minutes to discharge other impurities in the box;

[0044] Step 2: After the pre-ventilation is completed, the blower 13 is turned off, a certain wind speed of the blower 13 is set, and the blower 13 is turned on again to conduct formal ventilation into the box through the air inlet 12;

[0045] Step 3: During the formal ventilation process, a certain mass concentration of dust is continuously released into the box through the dust release device 9. The blower can fill the entire box with dust. Since part of the dust can enter the dust collection box 15 from the air outlet 14 under the action of the blower 13, the dust release device 9 that continuously releases dust can ensure that the box is filled with dust.

[0046] Step 4: After ventilation for a period of time, the control system controls the dust concentration detection device 10 to detect the dust concentration at different positions in the box, and transmits the detection results to the control system;

[0047] Step 5: The control system controls the spray device 11 to spray dust on the box. After the spraying is completed, the control system controls the dust concentration detection device 10 to detect the dust concentration after the spraying, and transmits the detection result to the control system;

[0048] Step 6: The control system analyzes the dust concentration data before and after the spraying, determines the low dust concentration position area of ​​the connecting rod of the intelligent coal caving hydraulic support model 1 where the camera 22 is installed, and determines the installation position of the camera 22;

[0049] Step seven, after the experiment is completed, the dust release device is turned off, and the blower 13 is used for final ventilation treatment, the experimental dust is discharged into the dust collection box 15, the dust is recovered and treated, and finally the blower 13 is turned off.

[0050] It is further preferred in the implementation manner of this embodiment that in step 4, by adjusting the length of the dust concentration detection device 10 extending into the box, the dust concentration at different depths in the box can be detected.

[0051] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. An intelligent coal dust concentration detection experimental device, characterized in that: include: The box body comprises a top plate, a bottom plate, a first side plate, a second side plate, a third side plate and a fourth side plate, wherein the first side plate is provided with an air inlet connected to the outside, and the second side plate is provided with an air outlet connected to the outside; An intelligent coal-laying hydraulic support model, wherein the number of the intelligent coal-laying hydraulic support models is multiple, and the multiple intelligent coal-laying hydraulic support models are placed side by side in the box; A dust release device, wherein the number of the dust release devices is multiple, and the multiple dust release devices are evenly arranged on the top plate, the third side plate and the fourth side plate, and are used to release a fixed amount of dust into the box; A spray device, wherein the number of the spray devices is multiple, and the multiple spray devices are evenly arranged on the top plate and the third side plate, and are used to spray water mist into the box; A dust concentration detection device, wherein the number of the dust concentration detection devices is multiple, and the multiple dust concentration detection devices are evenly arranged on the top plate, the third side plate and the fourth side plate, and are used to detect the dust concentration in the box; The control system, the dust release device, the spray device and the dust concentration detection device are all connected to the control system signal.

2. The intelligent coal dust concentration detection experimental device according to claim 1 is characterized in that: It also includes a blower, which is connected to the air inlet through a pipeline and is used to transport air into the box. The blower is connected to the control system signal.

3. The intelligent coal dust concentration detection experimental device according to claim 1 is characterized in that: It also includes a dust collection box, which is connected to the air outlet through a pipeline and is used to collect dust in the box.

4. The intelligent coal dust concentration detection experimental device according to claim 1 is characterized in that: A coal body model is arranged in the box body, and the coal body model is placed at an angle between the top plate and the third side plate.

5. The intelligent coal dust concentration detection experimental device according to claim 4 is characterized in that: The intelligent coal placing hydraulic support model comprises a base, a top beam, a shield beam, a column, a front connecting rod, a rear connecting rod, a camera, a fill light, a guard plate, a front beam, a tail beam, a plug plate and a rear scraper. The base is placed on the bottom plate, the base is fixedly connected to the top beam through the column, the base is fixedly connected to the shield beam through the front connecting rod and the rear connecting rod, the camera and the fill light are both fixed on the rear connecting rod, the top beam is fixedly connected to the shield beam, and there is a certain angle between the top beam and the shield beam, and the front One end of the beam is fixedly connected to the top beam, the other end of the front beam is fixedly connected to the guard plate, the top beam and the front beam are both in contact with the top plate, the guard plate is in contact with the fourth side plate, one end of the tail beam is fixedly connected to the shield beam, and a certain angle is formed between the tail beam and the shield beam, the shield beam and the tail beam are both in contact with the coal body model, the other end of the tail beam is fixedly connected to the plug plate, the rear scraper is connected to the base through a telescopic rod, and the rear scraper can be in contact with the third side plate.

6. The intelligent coal dust concentration detection experimental device according to claim 1 is characterized in that: The box body is made of acrylic plate.

7. The intelligent coal dust concentration detection experimental device according to claim 1 is characterized in that: The dust concentration detection device comprises a probe and a telescopic rod, wherein the probe is fixedly connected to the telescopic rod, and the probe is connected to the control system signal.

8. The intelligent coal dust concentration detection experimental device according to claim 1 is characterized in that: The material of the intelligent coal-laying hydraulic support model is acrylic plate.

9. A detection method using the intelligent coal dust concentration detection experimental device according to any one of claims 1 to 8, characterized in that: The steps include: Step 1: Check the sealing of the box, then open the air inlet and the air outlet, and pre-ventilate the box through the air inlet for 20 minutes to discharge other impurities in the box; Step 2: After the impurities are discharged, regular air with a certain wind speed is introduced into the box again through the air inlet; Step 3, continuously releasing a certain mass concentration of dust into the box through the dust release device, so that the dust fills the entire box; Step 4: After ventilation for a period of time, the control system controls the dust concentration detection device to detect the dust concentration at different positions in the box, and transmits the detection results to the control system; Step 5, the control system controls the spray device to spray dust on the box body. After the spraying is completed, the control system controls the dust concentration detection device again to detect the dust concentration after the spraying, and transmits the detection result to the control system; Step 6, the control system analyzes the dust concentration data before and after the spraying, determines the low dust concentration position area of ​​the connecting rod of the intelligent coal caving hydraulic support model where the camera is installed, and determines the installation position of the camera; Step seven, after the experiment is completed, close the dust release device and discharge the dust in the box through the air outlet.

10. The detection method of the intelligent coal dust concentration detection experimental device according to claim 9 is characterized in that: In the step 4, by adjusting the length of the dust concentration detection device extending into the box, the dust concentration at different depths in the box can be detected.

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