A terahertz detection device for mine dust

Abstract

The invention relates to the technical field of dust detection, and specifically discloses a terahertz detection device for dust in a mine tunnel, comprising a detection box and a controller, wherein a plurality of transparent ventilation pipes are arranged at intervals in the detection box, the front end of the transparent ventilation pipe is opened and extends out of the detection box, and the rear end is connected to an exhaust pump through an exhaust pipe, a gantry across the plurality of transparent ventilation pipes is arranged in the detection box, movable seats are arranged on both side ends of the gantry, a driving assembly for realizing synchronous upward and downward movement of two movable seats is arranged on the gantry, and relatively aligned terahertz transmitters and terahertz receivers are respectively arranged on the two movable seats; when the terahertz detection device of the invention performs continuous multi-point detection, filtered gas can be introduced into other spare transparent ventilation pipes synchronously for effective flushing and cleaning, so as to avoid that subsequent detection results will be affected by the last detection, effectively avoid experimental errors, and ensure the accuracy of the detection results.

Description

Technical Field

[0001] This invention relates to the field of dust detection technology, and specifically discloses a terahertz detection device for mine dust. Background Technology

[0002] During the mining process, multiple mine tunnels need to be excavated for transporting ore. However, a large amount of dust is generated during the transportation of ore in the mine tunnels. This dust not only reduces the visibility inside the mine tunnels, but also seriously affects the physical and mental health of the workers. Therefore, it is necessary to detect the dust inside the mine tunnels during the mining process and use a spray dust removal method to settle the dust.

[0003] A utility model patent with application number 202022099788X discloses a dust concentration detection device, including a detection cylinder and a ventilation pipe. A low-light lamp is fixedly installed on the left side of the inner cavity of the detection cylinder, a photosensitive sensor and a PLC control board are fixedly installed on the right side of the inner cavity, a display screen is fixedly embedded in the middle of the right side of the detection cylinder, and a power switch is installed on the top right side of the detection cylinder. During use, this dust concentration detection device uses a motor to drive a fan blade to rotate, allowing external air to flow quickly through the inner cavity of the detection cylinder. The photosensitive sensor then detects the intensity of the light emitted by the low-light lamp to determine the dust concentration. Although this dust concentration detection device has a fast detection speed and low manufacturing cost, it uses a photosensitive sensor to detect dust concentration in mine tunnels, which can only provide a preliminary estimate of the dust concentration, resulting in poor detection accuracy. Furthermore, when detecting dust concentration in mine tunnels, multiple points of detection are required to ensure the accuracy of the results. However, in continuous detection, dust entering the ventilation pipe in the previous detection can affect the results of subsequent detections, compromising the accuracy of the detection. Based on this, this application proposes a terahertz detection device for mine dust that can effectively solve the above-mentioned technical problems. On the one hand, it can accurately measure the concentration of mine dust, and on the other hand, it can effectively avoid the influence of the previous detection on the current detection result during multi-point continuous detection, so as to obtain more accurate detection results. Summary of the Invention

[0004] The present invention aims to provide a terahertz dust detection device for mine tunnels, so as to solve the shortcomings of existing dust concentration detection devices when used for continuous multi-point detection in mine tunnels.

[0005] This invention is achieved through the following technical solution:

[0006] A terahertz detection device for mine dust includes a detection box and a controller. Several transparent ventilation pipes are arranged vertically and vertically inside the detection box. The front end of each transparent ventilation pipe is open and extends out of the detection box, and the rear end is connected to a suction pump through a suction pipe.

[0007] The detection box is equipped with a gantry frame spanning several transparent ventilation tubes. Movable seats are provided on both sides of the gantry frame, and a drive assembly is provided on the gantry frame to enable the two movable seats to move up and down synchronously. A terahertz transmitter and a terahertz receiver are respectively provided on the two movable seats.

[0008] A storage frame is provided on the side of the front end of the transparent vent tube. The front opening of the storage frame extends out of the detection box and the rear end is sealed. A track frame is provided between the storage frame and the transparent vent tube. A partition is inserted into the track frame. An air inlet corresponding to the front opening of the transparent vent tube is opened on the partition, and a dust filter layer is provided in the air inlet. An end plate is connected to the outer end of the partition, and a spring is connected between the end plate and the storage frame. A guide pressure plate is provided on the side of the movable seat, which acts on the end plate and pushes the partition outward.

[0009] As a further feature of the above solution, each of the storage boxes is connected to an air blowing pipe at its rear end. The end of the air blowing pipe is connected to a compressed air source via a compressed air pipe, and a solenoid valve is installed on the compressed air pipe.

[0010] As a further feature of the above scheme, the guide plate is triangular, and wear-resistant rollers that interact with the guide plate are rotatably connected to both the upper and lower ends of the end plate.

[0011] As a further provision of the above solution, the drive assembly includes two lead screws rotatably connected to both ends of the gantry frame. The ends of the two lead screws are connected to synchronous pulleys, and one of the synchronous pulleys is connected to a drive motor. A synchronous belt is provided between the two synchronous pulleys, and a lead screw nut that matches the lead screw is provided on the movable seat.

[0012] As a further feature of the above scheme, slide rails are provided on both sides of the gantry frame, and the movable seat has a sliding opening that matches the slide rails.

[0013] As a further provision of the above scheme, the air extraction pipeline includes an air extraction pipe connected to the lower rear surface of each transparent vent pipe, an electromagnetic control valve is provided on the air extraction pipe, and the ends of all the air extraction pipes are connected to a common air extraction main pipe, which is connected to an air extraction pump.

[0014] As a further feature of the above scheme, the controller is equipped with a display screen, a processing module, a control module, and an alarm.

[0015] As a further feature of the above solution, a support frame is also included, with the detection box positioned at the top of the support frame.

[0016] The terahertz dust detection device disclosed in this invention continuously detects dust in mine tunnels. It employs multiple vertically spaced transparent ventilation pipes, combined with baffles containing dust filters. When the terahertz transmitter and receiver move vertically to align with one of the transparent ventilation pipes, the opening of that pipe is fully opened, while the openings of the other pipes are blocked by the dust filters. At this point, an air pump is activated to simultaneously extract air from all the ventilation pipes. The detected pipe allows unobstructed access to the mine tunnel's internal air at the current location. The terahertz transmitter and receiver then accurately detect the dust concentration at that location. Simultaneously, the undetected pipes, with their openings blocked by the dust filters, allow filtered air to be drawn into them, cleaning the dust inside.

[0017] Subsequently, when detecting dust concentration at the next location, the terahertz transmitter and receiver were moved vertically to another transparent vent tube. This vent tube was then opened, allowing unobstructed airflow into the mine tunnel. Since this vent tube had been effectively cleaned previously, it prevented any air dust from the previous detection process from affecting the current test. Meanwhile, the front ends of other transparent vent tubes were blocked by dust filters, allowing for further cleaning with filtered air during this large-scale air extraction test. This ensured that no substances from previous tests remained in the transparent vent tubes during continuous testing, significantly improving detection accuracy.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] This invention uses a terahertz transmitter and a terahertz receiver to detect the air flowing in a transparent ventilation tube. Compared with the traditional photoelectric detection method, it has higher detection accuracy and better detection effect.

[0020] The detection device disclosed in this invention has multiple transparent ventilation tubes arranged vertically inside the detection chamber. During continuous multi-point detection, the gantry frame and drive assembly enable the terahertz transmitter and receiver to move vertically and align with the transparent ventilation tube to be detected. At the same time, the air inlets of other transparent ventilation tubes are blocked by a dust filter layer. This allows filtered gas to be simultaneously introduced into other backup transparent ventilation tubes for effective flushing and cleaning during subsequent air extraction detection. This avoids the influence of dust remaining in the transparent ventilation tubes from the previous detection during subsequent mine dust detection, effectively avoiding experimental errors and ensuring the accuracy of the detection results.

[0021] The present invention further includes a compressed air backflushing component. When there is a lot of dust adhering to the dust filter layer, causing blockage and affecting its filtration effect, it can be backflushed to achieve rapid cleaning, ensuring effective flushing and cleaning of the inside of the transparent air duct that is not in use for testing. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention from a first angle;

[0024] Figure 2 This is a schematic diagram of the second-angle three-dimensional structure of the present invention;

[0025] Figure 3 This is a three-dimensional structural diagram of the interior of the detection box of the present invention from a first angle;

[0026] Figure 4 This is a schematic diagram of the second angle three-dimensional structure inside the detection box of the present invention;

[0027] Figure 5 This is a three-dimensional structural diagram of the transparent ventilation tube, gantry frame, and movable base in this invention;

[0028] Figure 6 This is a three-dimensional structural diagram of the gantry, terahertz transmitter, terahertz receiver, etc. in this invention;

[0029] Figure 7 This is a schematic diagram of the three-dimensional structure of the transparent vent pipe, track frame, partition, etc. in this invention. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The following will refer to the appendix... Figures 1-7 This application will be described in detail with reference to the embodiments. Example 1

[0032] Example 1 discloses a terahertz detection device for mine dust, see attached figure. Figure 1 and attached Figure 2 The main body of the testing device includes a support frame 1 and a testing box 2. The support frame 1 includes several legs and a carrier plate. The legs are rotatably connected to the lower surface of the carrier plate, allowing the entire support frame 1 to be stored and unfolded for use. The testing box 2 is fixedly mounted on the carrier plate on the support frame 1. In specific designs, the testing box 2 can also be rotatably connected to the carrier plate via a vertical shaft, allowing the testing box 2 to rotate 360° during the testing process to achieve multi-directional testing.

[0033] Reference Appendix Figure 3 A controller 3, which integrates a display screen, processing module, control module and alarm, is fixedly installed on the side of the detection box 2. This allows the detection results to be displayed on the screen in real time and controlled to trigger an alarm through preset thresholds.

[0034] Reference Appendix Figure 4 and attached Figure 5 A row of equally spaced transparent ventilation pipes 4 is installed in the detection box 2. In this diagram, there are three transparent ventilation pipes 4: upper, middle, and lower. One end of each transparent ventilation pipe 4 is open, and the other end is sealed. The open end of the transparent ventilation pipe 4 extends out of the front side of the detection box 2 and is fixed thereto. An extraction pipe 5 is connected to the lower surface of each transparent ventilation pipe 4 near the sealed end. An electromagnetic control valve 6 is installed on the extraction pipe 5. The ends of all extraction pipes 5 extend out of the detection box 2 and are connected to a common extraction main pipe 7. An extraction pump 8 is connected to the end of the extraction main pipe 7. The electromagnetic control valve 6 connects the corresponding extraction pipe 5, and the extraction pump 8 allows dust in the mine tunnel to enter the corresponding transparent ventilation pipe 4.

[0035] Reference Appendix Figure 5 and attached Figure 6 The testing chamber 2 is equipped with a gantry frame 9 spanning a row of transparent ventilation pipes 4. Vertically mounted slide rails 10 and lead screws 11 are fixed to both ends of the gantry frame 9. Bearing seats 12, fixed to the gantry frame 9, are located at both the upper and lower ends of the lead screws 11. A synchronous pulley 13 is connected to the top of each lead screw 11, and a drive motor 14 is connected to one of the synchronous pulleys 13. A synchronous belt 15 is placed between the two synchronous pulleys 13, ensuring that the two lead screws 11 rotate synchronously under the action of the drive motor 14.

[0036] Movable seats 16 are provided at both ends of the gantry frame 9. Each movable seat 16 has a sliding groove matching the slide rail 10 and a lead screw nut matching the lead screw 11. A terahertz transmitter 17 and a terahertz receiver 18 are fixedly mounted on the two movable seats 16 respectively, and both are electrically connected to the controller 3 via wires. The terahertz transmitter 17 and the terahertz receiver 18 are aligned, with the line connecting them perpendicular to the transparent vent tube 4. Through the transmission action between the lead screw 11 and the lead screw nut, the terahertz transmitter 17 and the terahertz receiver 18 can move synchronously up and down, aligning with the corresponding transparent vent tube 4.

[0037] Reference Appendix Figure 5 and attached Figure 7 A storage frame 19 is provided on the side of the front end of each transparent ventilation pipe 4, with the front opening of the storage frame 19 extending out of the detection box 2 and the rear seal located inside the detection box 2. A longitudinal track frame 20 is then provided between the storage frame 19 and the front end of the transparent ventilation pipe 4, and the storage frame 19 is connected to the front end of the transparent ventilation pipe 4 through the track frame 20. A partition 21 is inserted into the track frame 20, with an air inlet adapted to the transparent ventilation pipe 4. A dust filter layer 22 is provided in the air inlet, which effectively filters dust from the mine tunnel. An inwardly bent end plate 23 is connected to the outer end of the partition 21 extending out of the track frame 20, and a spring 24 is connected between the end plate 23 and the storage frame 19. Under the action of the spring 24, the dust filter layer 22 is always located at the front end of the transparent ventilation pipe 4, thereby effectively filtering the dust entering the transparent ventilation pipe 4.

[0038] A triangular guide plate 161 is fixed on the movable seat 16 near one end of the end plate 23, and the guide plate 161 is on the same vertical line as the end plate 23. During the downward or upward movement of the movable seat 16, the guide plate 161 acts on the end plate 23, causing the partition 21 to overcome the force of the spring 24 and move outward along the track frame 20. This allows the partition 21 to move away from the front end of the transparent vent tube 4, ensuring that the front end of the transparent vent tube 4 remains open. Finally, to reduce frictional loss between the guide plate 161 and the end plate 23, wear-resistant rollers 241 are rotatably connected to both the upper and lower ends of the end plate 23. This allows the guide plate 161 to contact the wear-resistant rollers 241 when acting on the end plate 23, thereby converting sliding friction into rolling friction and reducing wear on the guide plate 161. Example 2

[0039] Example 2 discloses a terahertz detection device for mine dust that is an improved design based on the technical solution in Example 1. The similarities between it and Example 1 will not be described again.

[0040] Reference Appendix Figure 4 Appendix Figure 5 and attached Figure 7 Each storage frame 19 has an air blowing hole 191 on its rear sealing surface. A compressed air source 25 is installed outside the testing box 2. The compressed air source 25 can be an air compressor, a compressed air tank, or a compressed air manifold. A compressed air pipe 26 is connected to the compressed air source 25, and a solenoid valve 27 is connected to the end of the compressed air pipe 26 near the compressed air source 25. Several air blowing pipes 28 are connected to the end of the compressed air pipe 26 that extends into the testing box 2, and the air blowing pipes 28 are connected to the corresponding air blowing holes 191.

[0041] In the detection process of the mine dust terahertz detection device disclosed in Embodiment 2, the drive motor 14 is first started to make the two lead screws 11 rotate synchronously, thereby moving the terahertz transmitter 17 and the terahertz receiver 18 to align with one of the transparent ventilation tubes 4. During the movement of the moving seat 16, the guide pressure plate 161 acts on the end plate 23 corresponding to the transparent ventilation tube 4, thereby causing the partition plate 21 to overcome the force of the spring 24 and move outward along the track frame 20, so that the front end of the transparent ventilation tube 4 is in an open state, while the front ends of the other transparent ventilation tubes 4 are blocked by the dust filter layer 22.

[0042] Open all electromagnetic control valves 6 and start the air pump 8. At this time, all transparent ventilation pipes 4 will be under negative pressure to draw air from the mine tunnel into the transparent ventilation pipes 4. However, the transparent ventilation pipes 4 whose front ends are blocked by the dust filter layer 22 will draw in filtered clean air. The clean air can also clean the inside of the transparent ventilation pipes 4 that are not being tested. The terahertz transmitter 17 and the terahertz receiver 18 are aimed at the unfiltered transparent ventilation pipes 4.

[0043] Subsequently, the terahertz transmitter 17 and terahertz receiver 18 are put into detection (the specific detection principle can be found in the invention disclosed in application number 2021103500697), and the detection signal is transmitted to the controller 3 in real time. The internal processing module of the controller 3 analyzes and processes the data, and feeds back the detection results to the display screen in real time. At the same time, once the detected dust concentration exceeds the preset threshold, the control module will trigger the alarm.

[0044] Next, when it is necessary to detect the dust concentration at other locations, the terahertz transmitter 17 and terahertz receiver 18 are directly controlled to move to other locations of the transparent ventilation pipe 4 that have been flushed and cleaned. At this time, the opening of the transparent ventilation pipe 4 that was previously put into detection will be blocked by the dust filter layer 22. In the subsequent detection process, it can be flushed and cleaned by the filtered air. At this time, the gas inside the transparent ventilation pipe 4 during the detection process is the air drawn into the mine tunnel at that location in real time, which further improves the detection accuracy.

[0045] Finally, when there is a lot of dust adhering to the dust filter layer 22, which affects the filtration effect, the compressed air source 25 and the solenoid valve 27 can be directly turned on to backwash the dust filter layer 22 to achieve rapid cleaning.

[0046] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A terahertz detection device for mine dust, comprising a detection box and a controller, characterized in that: A plurality of transparent ventilation tubes are arranged at intervals in the upper and lower parts of the detection box, the front end of the transparent ventilation tube is open and extends out of the detection box, and the rear end is connected to an air pump through an air extraction pipeline; The detection box is provided with a gantry that spans across a number of transparent ventilation tubes, and movable seats are provided on both side ends of the gantry. The gantry is provided with a driving assembly that enables two movable seats to move up and down synchronously, and the two movable seats are respectively provided with a relatively aligned terahertz transmitter and a terahertz receiver; A storage frame is arranged beside the front end of the transparent ventilation tube, the front end opening of the storage frame extends out of the detection box, and the rear end is sealed, a track frame is arranged between the storage frame and the transparent ventilation tube, a partition is inserted into the track frame, an air inlet corresponding to the front end opening of the transparent ventilation tube is opened on the partition, and a dust filter layer is arranged in the air inlet, the outer end of the partition is connected to an end plate, and a spring is connected between the end plate and the storage frame, and a guide pressure plate acting on the end plate and pushing the partition outward is arranged on the side end of the movable seat.

2. The mine dust terahertz detection device according to claim 1, characterized in that: The rear end surface of each storage frame is connected with an air blowing pipe, the end of the air blowing pipe is connected with a compressed air source through a compressed air pipe, and a solenoid valve is arranged on the compressed air pipe.

3. The mine dust terahertz detection device according to claim 1, characterized in that: The guide pressure plate is triangular in shape, and the upper and lower ends of the end plate are rotatably connected with wear-resistant rollers that act on the guide pressure plate.

4. The mine dust terahertz detection device according to claim 1, characterized in that: The driving assembly includes two screw rods rotatably connected to the two side ends of the gantry, the ends of the two screw rods are connected to synchronous wheels, and one end of the synchronous wheels is connected to a driving motor, a synchronous belt is arranged between the two synchronous wheels, and a screw nut matching the screw rod is arranged on the moving seat.

5. The mine dust terahertz detection device according to claim 4, characterized in that: Both side ends of the gantry are provided with slide rails, and the movable seat is provided with slide openings matching with the slide rails.

6. The mine dust terahertz detection device according to claim 1, characterized in that: The exhaust pipe includes an exhaust pipe connected to the lower surface of the rear end of each transparent ventilation pipe, an electromagnetic control valve is arranged on the exhaust pipe, and the ends of all the exhaust pipes are commonly connected to an exhaust main pipe, and the exhaust main pipe is connected to an exhaust pump.

7. The mine dust terahertz detection device according to claim 1, characterized in that: The controller is provided with a display screen, a processing module, a control module and an alarm.

8. The mine dust terahertz detection device according to claim 1, characterized in that: It also includes a bracket, and the detection box is arranged on the top end of the bracket.

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