A dust concentration measuring device and method for occupational health detection in mining industry

Abstract

The present invention discloses a dust concentration measuring device and method for occupational health detection in the mining industry, specifically relates to the technical field of dust concentration detection, including a U-shaped frame, a mounting bracket and a power supply are fixedly installed on the inner bottom end surface of the U-shaped frame, the mounting bracket is composed of a mounting plate and support feet fixedly arranged at the four corners of the bottom of the mounting plate, and the four support feet are arranged in a flared shape from top to bottom, a dust concentration sensor is fixedly installed on the top of the mounting bracket by a locking bolt, a sliding mechanism is arranged on one side of the U-shaped frame, and a sensor cleaning mechanism is arranged on the inner side of the U-shaped frame at the position of the mounting bracket. The present invention uses a driving gear to mesh with a tooth block on a track plate to move the U-shaped frame along the track plate, thereby realizing real-time dynamic measurement of dust concentration in the area, and intermittently squeezes the baffle through the top rod that moves in a circular motion to drive the cleaning brush to intermittently clean the dust concentration sensor measurement area.

Description

Technical Field

[0001] The present invention relates to the technical field of dust concentration detection, and more specifically, to a dust concentration measuring device and method for occupational health detection in the mining industry. Background Art

[0002] Dust refers to solid particles suspended in the air. There are many names for dust, such as dust, dust, smoke, mine dust, sand dust, powder, etc. Dust in the atmosphere will have a catastrophic impact on the environment, and industrial dust is the natural enemy of human health and the main cause of many diseases. Especially in coal mines, dust is more harmful. It not only causes miners to suffer from pneumoconiosis, but also causes gas explosions. Therefore, the dust concentration must be detected accurately and quickly. At present, the following measurement methods are often used to measure the concentration of dust particles: one is the weighing method, that is, a certain volume of air is extracted through a filter membrane with a constant weight, and dust particles remain on the filter membrane. The particle concentration can be calculated by the weight difference before and after sampling; the second is to use the effect of dust particles on various light (blocking, absorption, diffuse reflection, etc.), and obtain dust concentration information by measuring the changes before and after light irradiation.

[0003] However, the dust measuring device in the prior art is generally fixedly installed in the return air lane of the coal mining face or the return air side of the excavation face using a special hanging device, and can only measure the dust concentration in the specified area. Once a lot of dust is attached, it will greatly affect the measurement accuracy, which is extremely inconvenient to use.

[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides a dust concentration measuring device and method for occupational health detection in the mining industry. By utilizing the driving gear to engage with the tooth block on the track plate, the U-shaped frame is moved along the track plate to realize real-time dynamic measurement of the dust concentration in the area, and the cleaning brush is driven by the circular motion of the top rod to intermittently squeeze the baffle to intermittently clean the dust concentration sensor measurement area, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a dust concentration measuring device for occupational health detection in the mining industry, comprising a U-shaped frame, a mounting bracket and a power supply are fixedly installed on the inner bottom end surface of the U-shaped frame, the mounting bracket is composed of a mounting plate and supporting feet fixedly arranged at the four corners of the bottom of the mounting plate, and the four supporting feet are arranged in a flared shape from top to bottom, a dust concentration sensor is fixedly installed on the top of the mounting bracket by a locking bolt, a sliding mechanism is arranged on one side of the U-shaped frame, and a sensor cleaning mechanism is arranged on the inner side of the U-shaped frame at the position of the mounting bracket;

[0007] The cam is provided with a plurality of tooth blocks, each of which is fixedly provided with a plurality of tooth blocks, and the plurality of tooth blocks are connected to each other by the plurality of tooth blocks.

[0008] The sensor cleaning mechanism includes a top rod fixedly arranged on the outer peripheral surface of one end of the shaft away from the driving motor and two side plates fixedly installed on the bottom end surface of the inner side of the U-shaped frame, a limiting connecting rod is fixedly arranged between the middle parts of the tops of the two side plates on opposite sides, and a flip plate is also arranged between the two side plates, one end of the flip plate is horizontally penetrated with a through groove, the limiting connecting rod is movably arranged inside the through groove, and ear plate frames are fixedly installed on both sides of the end of the top surface of the flip plate close to the through groove, the top ends of the two ear plate frames are hinged with vertically arranged vertical rods, and the top of the mounting plate A through hole is vertically penetrated at the position of the corresponding vertical rod, and the top ends of the two vertical rods are movably penetrated through the through holes arranged at the corresponding positions, a horizontal bar is fixedly provided between the top ends of the two vertical rods, a cleaning brush is fixedly provided on the side of the horizontal bar facing the dust concentration sensor, one side of the flip plate away from the through-groove end is fixedly connected to a horizontal rod, the end of the horizontal rod away from the flip plate is fixedly connected to a baffle, and the baffle and the flip plate are arranged in the same plane, a spring is provided at the middle part of the bottom of the horizontal bar, and the two ends of the spring are respectively fixedly connected to the bottom end surface of the horizontal bar and the top end surface of the mounting plate.

[0009] The beneficial effect of adopting the above-mentioned further scheme is that the driving gear can be used to engage with the tooth block on the track plate to move the U-shaped frame along the track plate, thereby realizing real-time dynamic measurement of the dust concentration in the area, and in the process of the U-shaped frame moving along the track plate, it can also drive the cleaning brush to intermittently clean the dust concentration sensor measurement area.

[0010] In a preferred embodiment, the inner bottom end surfaces of the two guide grooves are both configured as inwardly inclined slopes.

[0011] The beneficial effect of adopting the above further solution is that the accumulation of dust on the inner bottom end surface of the guide groove can be reduced.

[0012] In a preferred embodiment, a slanted block with an axial cross-section of a right-angled triangle is fixedly provided on one side of the bottom end surface of the two guide blocks close to the slider, and the inclined surface of the slanted block is arranged parallel to the inclined surface on the guide groove at the corresponding position, and a cleaning brush is fixedly provided on one end of the inclined surface of the slanted block.

[0013] The beneficial effect of adopting the above further solution is that the inclined block can be used to fit the inclined surface of the guide groove to move, and the dust remaining on the inclined surface of the guide groove can be cleaned in cooperation with the second cleaning brush.

[0014] In a preferred embodiment, both sides of the bottom end of the slider and both side walls of the bottom end of the inner cavity of the slideway are configured as constricted structures, and a plurality of leakage holes are vertically penetrated in the middle of the inner cavity bottom end surface of the slideway.

[0015] The beneficial effect of adopting the above further solution is that the cleaned dust can fall to the bottom of the inner cavity of the chute, and the dust inside the chute can leak out from the leakage hole as the slider moves.

[0016] In a preferred embodiment, the slider and the two side walls at the bottom of the slide groove are both provided with an arc-shaped structure that is concave toward one side of the leakage hole.

[0017] The beneficial effect of adopting the above further solution is that the amount of dust remaining inside the chute after cleaning can be greatly reduced.

[0018] In a preferred embodiment, a plurality of arc grooves are provided in the middle of the inner top end surface and the middle of the bottom end surface of the two guide grooves, and a ball is rollingly embedded in each arc groove.

[0019] The beneficial effect of adopting the above further solution is that the contact friction during the movement of the guide block along the guide groove can be greatly reduced, thereby reducing the output energy consumption of the drive motor.

[0020] In a preferred embodiment, a mesh cylinder mounted on the outside of the driving motor is fixedly provided on one side of the U-shaped frame on which the driving motor is mounted, and a plurality of concentrically arranged arc-shaped through-holes are penetrated through the side of the U-shaped frame on which the driving motor is mounted, and a mesh plate is fixedly installed on the end of each through-hole away from the driving motor, and an impeller is fixedly mounted on the outer peripheral surface of the shaft between the driving gear and the driving motor.

[0021] The beneficial effect of adopting the above further scheme is that the impeller can be driven to rotate so that the wind blown by the impeller can be blown through the perforations to the working area of ​​the drive motor, thereby accelerating the dissipation of heat generated by the drive motor and blowing away the dust attached to the surface of the mesh cylinder.

[0022] In a preferred embodiment, a straight bar is fixedly provided on the outer circumference of the shaft rod between the impeller and the drive motor and close to the inner wall of the U-shaped frame, and a cleaning brush three is fixedly provided on one end of the straight bar away from the shaft rod, and the cleaning brush three is arranged on the side of the straight bar away from the impeller.

[0023] The beneficial effect of adopting the above further solution is that the dust accumulated on the screen can be continuously cleaned by three pairs of cleaning brushes that move in a circular motion with the straight bars.

[0024] In a preferred embodiment, the inner bottom end surface of the U-shaped frame is configured as a convex arc surface.

[0025] The beneficial effect of adopting the above further solution is that it is helpful to guide the accumulated dust to slide down.

[0026] The present invention also provides a method for measuring dust concentration using the above-mentioned dust concentration measuring device, which specifically includes the following operating steps:

[0027] S1: Connect the driving motor and the dust concentration sensor to the power supply, and connect the dust concentration sensor to the external display device;

[0028] S2: Start the drive motor to drive the drive gear to rotate, and use the drive gear to mesh with the tooth block on the track plate to move the U-shaped frame along the track plate to achieve real-time dynamic measurement of dust concentration in the area. After the measurement, the entropy weight algorithm is used to evaluate the dynamic measurement results, and the evaluation model is constructed as follows:

[0029] R=f=1-P f C f =1-(1-P s )(1-C s )=P s +C s -P s C s

[0030] Among them, R represents the matrix form of the evaluation result, f represents the digital form of the evaluation result, P represents the estimated value of dust concentration, C represents the measured value of dust concentration, and s represents the amount of dust at different times.

[0031] The matrix form of R is expanded as follows:

[0032]

[0033] Where r represents the dust concentration assessment results at different intervals of 10 minutes;

[0034] According to the probability and impact of the object evaluation model, different evaluation arrangement matrices are obtained, respectively using R P and R C Indicates that the weight of each evaluation is A = (a1, a2, ..., a n ), corresponding to the risk assessment level V, assign corresponding thresholds to each existing dust assessment index, and obtain the weight vector B = (b1, b2, ... b m ). The risk probability is calculated based on the risk level assessment indicators. The specific process is as follows:

[0035] P S =AP P B T

[0036] The weight vector of dust concentration is A = (a1, a2, ... a n ), assign corresponding thresholds to each risk level indicator, and obtain the risk level weight vector B = (b1, b2, ... b m ). According to B=(b1,b2,…b m ) Calculate the consequences of different risks of dust concentration, the process is as follows:

[0037]

[0038] The entropy weight method is used to quantitatively calculate the data affecting dust concentration and obtain the risk factor U i , measured by entropy, the specific operation is as follows:

[0039]

[0040] Among them, r ij The closer the risks of (j=1, 2, ..., m), the larger the entropy value is. max =L n m, it is normalized, and the logistics distribution risk factor U i The weight can be 1-e i To express.

[0041] By dynamically measuring the dust concentration and establishing a result evaluation model, the effect of the device can be accurately evaluated, ensuring the effectiveness of the proposed invention device and allowing it to be promoted on a large scale.

[0042] S3: When the driving motor drives the driving gear to rotate, it will drive the push rod to do circular motion, so that the push rod repeatedly squeezes the baffle downwards, and drives the flip plate to flip with the limiting connecting rod as the central axis through the cross bar. When the flip plate flips, it will drive the vertical rod to move upward, thereby pushing the cross bar to move upward synchronously, so that the cleaning brush on the cross bar can be used to clean the dust attached to the dust concentration sensor measurement area, thereby improving the measurement accuracy;

[0043] S4: When the driving motor drives the driving gear to rotate, it also drives the impeller to rotate, so that the wind blown by the impeller is blown to the working area of ​​the driving motor through the perforations, thereby accelerating the dissipation of the heat generated by the driving motor and blowing away the dust attached to the surface of the mesh cylinder.

[0044] Technical effects and advantages of the present invention:

[0045] 1. The present invention utilizes the engagement of the driving gear with the tooth block on the track plate, so that the U-shaped frame can move along the track plate when the driving motor drives the driving gear to rotate, thereby realizing real-time dynamic measurement of dust concentration in the area. The design of this structure breaks the installation method of the traditional dust concentration measuring device using a dedicated hanging device for fixed installation, and only one measuring element is needed to measure the dust concentration in a large area, which is more convenient and practical;

[0046] 2. The present invention utilizes the top rod to intermittently squeeze the baffle plate, and cooperates with the spring to make the baffle plate and the flip plate flip back and forth with the limiting connecting rod as the central axis, and under the limiting effect of the through hole, the vertical rod is allowed to move stably in the vertical direction, and at the same time, the horizontal bar is pushed to move up and down synchronously, so that the cleaning brush on the horizontal bar can be used to reciprocate and clean the dust attached to the dust concentration sensor measurement area;

[0047] 3. The present invention can use the inclined block to fit the inclined surface of the guide groove to move, and cooperate with the cleaning brush to clean the dust remaining on the inclined surface of the guide groove, and the dust swept down and the dust sliding down the inclined surface will fall along the shrinkage-shaped structure of the two side walls of the bottom end of the inner cavity of the slide groove to the middle of the inner cavity bottom of the slide groove, and with the movement of the slider, the dust inside the slide groove will leak out from the leakage hole, which is convenient for cleaning;

[0048] 4. The present invention drives the impeller to rotate through a driving motor, so that the wind blown by the impeller is blown to the working area of ​​the driving motor through the perforations, thereby accelerating the dissipation of heat generated by the driving motor and blowing away the dust attached to the surface of the mesh cylinder. At the same time, the straight bar performing circular motion will drive the cleaning brush to perform circular motion on the surface of the three-bonded mesh plate, thereby continuously cleaning the dust attached to the surface of the mesh plate to ensure the air permeability of the perforations.

[0049] 5. Dynamically measure the dust concentration, establish a dust concentration risk assessment algorithm based on the entropy weight method, and establish a result evaluation model. The assessment indicators of dust concentration risk are described, and the risk factor assessment weights are obtained by calculating the threat index that affects the concentration change. This can accurately evaluate the effect of the device and ensure the effectiveness of the proposed invention. It can also ensure the real-time nature of the dust concentration risk assessment and can be promoted on a large scale. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the present invention. The embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0051] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0052] Figure 2 It is a schematic diagram of the U-shaped frame structure of the present invention.

[0053] Figure 3 For the present invention Figure 1 Enlarged view of part A.

[0054] Figure 4 It is a schematic diagram of the local structure of the track plate of the present invention.

[0055] Figure 5 It is the assembly diagram of the slider and guide block of the present invention.

[0056] Figure 6 It is a schematic diagram of the structure of the sensor cleaning mechanism of the present invention.

[0057] Figure 7 It is a schematic diagram of the flip plate structure of the present invention.

[0058] Figure 8 For the present invention Figure 1 Enlarged view of part B.

[0059] The accompanying drawings are marked as follows: 1 U-shaped frame, 2 power supply, 3 mounting bracket, 4 dust concentration sensor, 5 sliding mechanism, 51 track plate, 52 lifting column, 53 guide groove, 54 slide groove, 55 slider, 56 guide block, 57 gear block, 58 driving motor, 59 shaft rod, 510 driving gear, 6 sensor cleaning mechanism, 61 push rod, 62 side plate, 63 limiting connecting rod, 64 flip plate, 65 ear plate frame, 66 vertical rod, 67 through hole, 68 horizontal bar, 69 cleaning brush one, 610 horizontal bar, 611 baffle, 612 spring, 613 through groove, 7 oblique block, 8 cleaning brush two, 9 leakage hole, 10 arc groove, 11 ball, 12 mesh cylinder, 13 impeller, 14 perforation, 15 mesh plate, 16 straight bar, 17 cleaning brush three. DETAILED DESCRIPTION

[0060] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of the present disclosure will be more comprehensive and complete and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0061] In addition, the described features, structures or characteristics may be combined in one or more example embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the example embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, components, steps, etc. may be adopted. In other cases, well-known structures, methods, implementations or operations are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0062] Example 1

[0063] Refer to the instruction manual Figure 1 and Figure 3-5 A dust concentration measuring device for occupational health detection in the mining industry according to an embodiment of the present invention comprises a U-shaped frame 1, a mounting bracket 3 and a power supply 2 are fixedly mounted on the inner bottom end surface of the U-shaped frame 1, the mounting bracket 3 is composed of a mounting plate and supporting feet fixedly arranged at the four corners of the bottom of the mounting plate, and the four supporting feet are arranged in a flared shape from top to bottom, a dust concentration sensor 4 is fixedly mounted on the top of the mounting bracket 3 by a locking bolt, and a sliding mechanism 5 is arranged on one side of the U-shaped frame 1.

[0064] Furthermore, the sliding mechanism 5 includes a track plate 51 located at the top inner side of the U-shaped frame 1, a hanging column 52 is fixedly arranged on the top of the track plate 51, guide grooves 53 are provided in the middle of both sides of the track plate 51, and the two guide grooves 53 are connected to the opposite ends of the inner cavity with a slide groove 54, and the guide groove 53 is slidably connected with a guide block 56, and the slide groove 54 is slidably connected with a slider 55, and the two sides of the guide block 56 are respectively fixedly connected to the slider 55 at the corresponding position and the inner side wall of the U-shaped frame 1, and the bottom end surface of the track plate 51 is fixedly provided with a plurality of equal The U-shaped frame 1 has tooth blocks 57 distributed at a certain distance, and a driving motor 58 is fixedly installed on the outer wall of one side of the U-shaped frame 1. The output shaft end of the driving motor 58 is fixedly connected to a shaft rod 59. The end of the shaft rod 59 away from the driving motor 58 can move through the corresponding side wall of the U-shaped frame 1, and the shaft rod 59 is rotatably connected to the U-shaped frame 1 at the connection point through a bearing. The shaft rod 59 is located on the outer circumference of the inner part of the U-shaped frame 1 at a position corresponding to the tooth block 57, and a driving gear 510 is fixedly sleeved thereon, and the track plate 51 is meshed with the driving gear 510 through the tooth block 57.

[0065] Furthermore, a plurality of arc grooves 10 are provided in the middle of the inner top end surface and the middle of the bottom end surface of the two guide grooves 53, and a ball 11 is rolled and embedded inside each arc groove 10, which can greatly reduce the contact friction of the guide block 56 during the movement of the guide groove 53 and reduce the output energy consumption of the driving motor 58.

[0066] It should be noted that the track plate 51 can be set as a closed-loop structure according to actual needs, and the track plate 51 is assembled from multiple track unit plates, and in the process of the U-shaped frame 1 moving along the track plate 51, the measurement area of ​​the dust concentration sensor 4 (mining type) is facing the forward direction of the U-shaped plate 1, wherein, after the track plate 51 of the U-shaped plate 1 loaded with the dust concentration sensor 4 after assembly is fixedly installed in the detection area through the hanging column 52, the drive motor 58 is started to work to drive the drive gear 510 to rotate, and since the track plate 51 passes through its The tooth block 57 on the bottom end surface is meshed with the driving gear 510, and the U-shaped plate 1 is slidably connected to the slide groove 54 and the guide groove 3 on the track plate 51 through the slider 55 and the guide block 56 fixedly assembled on the inner side thereof, so that when the driving gear 510 rotates, it will drive the U-shaped frame 1 to move along the track plate 51, thereby realizing real-time dynamic measurement of the dust concentration in the area. Compared with the prior art, it breaks the traditional dust concentration measuring device that uses a dedicated hanging device for fixed installation, and expands the measurement area, which is more convenient and practical.

[0067] Example 2

[0068] Refer to the instruction manual Figure 1 and Figure 6-7A dust concentration measuring device for occupational health detection in the mining industry according to an embodiment of the present invention comprises a U-shaped frame 1, a mounting bracket 3 and a power supply 2 are fixedly mounted on the inner bottom end surface of the U-shaped frame 1, the mounting bracket 3 is composed of a mounting plate and supporting feet fixedly arranged at the four corners of the bottom of the mounting plate, and the four supporting feet are arranged in a flared shape from top to bottom, a dust concentration sensor 4 is fixedly mounted on the top of the mounting bracket 3 by a locking bolt, and a sensor cleaning mechanism 6 is arranged at the position of the mounting bracket 3 on the inner side of the U-shaped frame 1.

[0069] Furthermore, the sensor cleaning mechanism 6 includes a top rod 61 fixedly arranged on the outer peripheral surface of the end of the shaft 59 away from the driving motor 58 and two side plates 62 fixedly installed on the inner bottom end surface of the U-shaped frame 1, a limiting connecting rod 63 is fixedly arranged between the middle parts of the tops of the two side plates 62 on the opposite sides, and a flip plate 64 is also arranged between the two side plates 62, one end of the flip plate 64 is horizontally penetrated with a through groove 613, the limiting connecting rod 63 is movably arranged inside the through groove 613, and ear plate frames 65 are fixedly installed on both sides of the end of the top surface of the flip plate 64 close to the through groove 613, and the tops of the two ear plate frames 65 are hinged with vertically arranged vertical rods 66, and the top of the mounting plate is opposite to the top of the mounting plate. A through hole 67 is vertically penetrated at the position of the vertical rod 66, and the top ends of the two vertical rods 66 are movably penetrated inside the through holes 67 arranged at the corresponding positions, a horizontal bar 68 is fixedly provided between the top ends of the two vertical rods 66, and a cleaning brush 69 is fixedly provided on the side of the horizontal bar 68 facing the dust concentration sensor 4, a horizontal bar 610 is fixedly connected to one side of the flip plate 64 away from the through groove 613, and a baffle 611 is fixedly connected to the end of the horizontal bar 610 away from the flip plate 64, and the baffle 611 and the flip plate 64 are arranged in the same plane, a spring 612 is provided at the middle part of the bottom of the horizontal bar 68, and the two ends of the spring 612 are respectively fixedly connected to the bottom end surface of the horizontal bar 68 and the top surface of the mounting plate.

[0070] It should be noted that the initial state of the flip plate 64 and the baffle 611 is inclined upward, the spring 612 is in a natural state, and the cleaning brush 69 moves up and down in contact with the measuring area of ​​the dust concentration sensor 4, while the top rod 61 that performs a circular motion gradually moves upward along the bottom end of the baffle 611 and squeezes the baffle 611. When the driving motor 58 drives the driving gear 510 to rotate, it will drive the top rod 61 to perform a circular motion. When the end of the top rod 61 away from the shaft rod 59 contacts the bottom end of the upper surface of the baffle 611, as the top rod 61 continues to rotate, it will gradually move upward along the bottom end of the upper surface of the baffle 611 and squeeze the baffle 611. Since the flip plate 64 and the baffle 611 are fixedly connected by the limiting link 63, the baffle 611 and the flip plate 64 are flipped around the limiting link 63 as the center axis. In addition, because the vertical rod 66 is movably penetrated into the through hole 67 on the mounting plate, and the vertical rod 6 6 is hinged between the bottom end and the ear plate frame 65, so that during the flipping process of the flipping plate 64, the limiting connecting rod 63 will slide inside the through groove 613, so that the vertical rod 66 can be ensured to make a stable vertical movement, and during the upward movement of the vertical rod 66, the horizontal bar 68 will be pushed to move upward synchronously, so that the dust attached to the measuring area of ​​the dust concentration sensor 4 can be cleaned by using the cleaning brush 69 on the horizontal bar 68. At the same time, during the upward movement of the horizontal bar 68, the spring 612 is stretched. Once the top rod 61 is separated from the squeezing of the baffle 611, the vertical rod 66 will move downward along the through hole 67 under the action of the restoring force of the spring 612, so that the baffle 611 and the flipping plate 64 return to the inclined state of the initial position. When the top rod 61 squeezes the baffle 611 again, the measuring area of ​​the dust concentration sensor 4 can be cleaned again. Compared with the prior art, it can ensure that there is no dust accumulation in the measuring area of ​​the dust concentration sensor 4, thereby improving the accuracy of real-time measurement.

[0071] Example 3

[0072] Refer to the instruction manual Figure 1-5 In one embodiment of the present invention, the inner bottom end surfaces of the two guide grooves 53 are both set as inclined surfaces inclined inwardly, and the bottom end surfaces of the two guide blocks 56 are fixedly provided with inclined blocks 7 with an axial cross-section of a right triangle on one side close to the slider 55, and the inclined surface of the inclined block 7 is parallel to the inclined surface on the corresponding position of the guide groove 53, and one end of the inclined surface of the inclined block 7 is fixedly provided with a cleaning brush 8, and the two sides of the bottom end of the slider 55 and the two side walls of the bottom end of the inner cavity of the slide groove 54 are both set as a constricted structure, and a plurality of leakage holes 9 are vertically penetrated in the middle of the bottom end surface of the inner cavity of the slide groove 54, and the slider 55 and the two side walls of the bottom end of the slide groove 54 are set as an arc-shaped structure recessed to the side of the leakage hole 9, and the inner bottom end surface of the U-shaped frame 1 is set as a convex arc surface.

[0073] It should be noted that the cleaning brush 8 is tiltedly arranged at the end of the inclined block 7 away from the forward direction, wherein, when the U-shaped frame 1 moves along the track plate 51, the guide block 56 and the slider 55 on the opposite sides of the inner cavity of the U-shaped frame 1 are slidably connected to the guide groove 53 and the inner part of the slide groove 54 at the corresponding positions, so that the inclined block 7 moves in accordance with the inclined surface of the guide groove 53, and cooperates with the cleaning brush 8 to clean the dust remaining on the inclined surface of the guide groove 53, and the dust swept down and the dust sliding down the inclined surface will fall along the constricted structure of the two side walls of the bottom end of the inner cavity of the slide groove 54 to the middle part of the inner cavity bottom of the slide groove 54, and with the movement of the slider 55, the dust inside the slide groove 54 will leak out from the leakage hole 9, and when the leaked dust falls on the inner bottom end surface of the U-shaped frame 1, it will also fall to the ground along the raised arc surface.

[0074] Example 4

[0075] Refer to the instruction manual Figure 1-2 and Figure 8 In one embodiment of the present invention, a mesh cylinder 12 sleeved on the outside of the driving motor 58 is fixedly provided on one side of the U-shaped frame 1 on which the driving motor 58 is installed, and a plurality of concentrically arranged arc-shaped through-holes 14 are penetrated through the side of the U-shaped frame 1 on which the driving motor 58 is installed, and the plurality of through-holes 14 are all located in the inner area of ​​the mesh cylinder 12, and a mesh plate 15 is fixedly installed on the end of each through-hole 14 away from the driving motor 58, and an impeller 13 is fixedly sleeved on the outer circumferential surface of the shaft rod 59 at a position between the driving gear 510 and the driving motor 58, and a straight bar 16 is fixedly provided on the outer circumferential surface of the shaft rod 59 between the impeller 13 and the driving motor 58 and close to the inner side wall of the U-shaped frame 1, and a cleaning brush three 17 is fixedly provided on the end of the straight bar 16 away from the shaft rod 59, and the cleaning brush three 17 is arranged on the side of the straight bar 16 away from the impeller 13.

[0076] It should be noted that the cleaning brush three 17 is in contact with the surface of the mesh plate 15 and makes a circular motion, and its motion trajectory just completely covers the annular area surrounded by the arc-shaped perforations 14, wherein, while the driving motor 58 drives the driving gear 510 to rotate, it will also drive the impeller 13 to rotate, and the rotation of the impeller 13 will generate wind, which will directly pass through the perforations 14 to the working area of ​​the driving motor 58. On the one hand, it can blow away the dust attached to the outer surface of the mesh tube 12 to prevent the mesh holes on the mesh tube 12 from being blocked, and on the other hand, it can accelerate the dissipation of the heat generated by the driving motor 58 to improve the working stability of the driving motor 58. At the same time, the straight bar 16 will also make a circular motion with the shaft 59, thereby driving the cleaning brush three 17 to make a circular motion in contact with the surface of the mesh plate 15, so as to continuously clean the dust attached to the surface of the mesh plate 15 and ensure the air flow of the perforations 14.

[0077] The present invention also provides a method for measuring dust concentration using the above-mentioned dust concentration measuring device, which specifically includes the following operating steps:

[0078] S1: Connect the driving motor 58 and the dust concentration sensor 4 to the power supply 2, and simultaneously connect the dust concentration sensor 4 to an external display device;

[0079] S2: Start the drive motor 58 to drive the drive gear 510 to rotate, and use the drive gear 510 to mesh with the tooth block 57 on the track plate 51 to move the U-shaped frame 1 along the track plate 51 to achieve real-time dynamic measurement of dust concentration in the area; after the measurement, use the entropy weight algorithm to evaluate the dynamic measurement results, and construct an evaluation model as follows:

[0080] R=f=1-P f C f =1-(1-P s )(1-C s )=P s +C s -P s C s

[0081] Among them, R represents the matrix form of the evaluation result, f represents the digital form of the evaluation result, P represents the estimated value of dust concentration, C represents the measured value of dust concentration, and s represents the amount of dust at different times.

[0082] The matrix form of R is expanded as follows:

[0083]

[0084] Where r represents the dust concentration assessment results at different intervals of 10 minutes;

[0085] According to the probability and impact of the object evaluation model, different evaluation arrangement matrices are obtained, respectively using R P and R C Indicates that the weight of each assessment is A = (a1, a2, ..., an), corresponding to the risk assessment level V, assigning corresponding thresholds to each existing dust assessment indicator, and obtaining the weight vector B = (b1, b2, ... bm). The risk probability is calculated based on the assessment risk level indicator. The specific process is as follows:

[0086] P S =AP P B T

[0087] S3: When the driving motor 58 drives the driving gear 510 to rotate, it drives the push rod 61 to make a circular motion, so that the push rod 61 repeatedly presses the baffle 611 downward, and drives the flip plate 64 to flip with the limiting connecting rod 63 as the central axis through the cross bar 610. When the flip plate 64 flips, it drives the vertical rod 66 to move upward, thereby pushing the cross bar 68 to move upward synchronously, so that the cleaning brush 69 on the cross bar 68 can be used to clean the dust attached to the measurement area of ​​the dust concentration sensor 4, thereby improving the measurement accuracy;

[0088] S4: When the driving motor 58 drives the driving gear 510 to rotate, it also drives the impeller 13 to rotate, so that the wind blown by the impeller 13 is blown to the working area of ​​the driving motor 58 through the perforation 14, thereby accelerating the dissipation of the heat generated by the driving motor 58 and blowing away the dust attached to the surface of the mesh tube 12.

[0089] By dynamically measuring the dust concentration, a dust concentration risk assessment algorithm based on the entropy weight method is proposed and a result evaluation model is established. The assessment indicators of dust concentration risk are described, and the risk factor assessment weights are obtained by calculating the threat index that affects the concentration change. This can effectively evaluate the effect of the device and ensure the effectiveness of the proposed invention. It can also ensure the real-time nature of the dust concentration risk assessment and can be promoted on a large scale.

[0090] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

[0091] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which may refer to mechanical connection or electrical connection, or internal communication between two components, or direct connection. "upper", "lower", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may change;

[0092] Secondly: In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other;

[0093] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dust concentration measuring device for occupational health testing in the mining industry, characterized in that: The invention comprises a U-shaped frame (1), wherein a mounting bracket (3) and a power supply (2) are fixedly mounted on the inner bottom end surface of the U-shaped frame (1), wherein the mounting bracket (3) is composed of a mounting plate and supporting feet fixedly mounted at the four corners of the bottom of the mounting plate, and the four supporting feet are arranged in a flared shape from top to bottom, and a dust concentration sensor (4) is fixedly mounted on the top of the mounting bracket (3) by means of locking bolts, a sliding mechanism (5) is arranged on one side of the U-shaped frame (1), and a sensor cleaning mechanism (6) is arranged on the inner side of the U-shaped frame (1) at the position of the mounting bracket (3); The sliding mechanism (5) comprises a track plate (51) located at the top inner side of the U-shaped frame (1), a hanging column (52) is fixedly provided on the top of the track plate (51), guide grooves (53) are provided in the middle of both sides of the track plate (51), the inner cavities of the two guide grooves (53) are connected to each other at opposite ends and are provided with slide grooves (54), and guide blocks (56) are slidably connected inside the guide grooves (53), and slide blocks (55) are slidably connected inside the slide grooves (54), and the two sides of the guide blocks (56) are respectively fixedly connected to the slide blocks (55) at corresponding positions and the inner side wall of the U-shaped frame (1), and the bottom end surface of the track plate (51) is fixedly provided with a plurality of equidistantly distributed A tooth block (57), a driving motor (58) is fixedly mounted on one side outer wall of the U-shaped frame (1), an output shaft end of the driving motor (58) is fixedly connected to a shaft rod (59), an end of the shaft rod (59) away from the driving motor (58) movably penetrates the side wall at a corresponding position of the U-shaped frame (1), and a connection between the shaft rod (59) and the U-shaped frame (1) is rotatably connected via a bearing, a driving gear (510) is fixedly sleeved on an outer circumferential surface of the inner portion of the U-shaped frame (1) at a position corresponding to the tooth block (57), and the track plate (51) is meshed with the driving gear (510) via the tooth block (57); The sensor cleaning mechanism (6) comprises a top rod (61) fixedly arranged on the outer peripheral surface of one end of the shaft (59) away from the driving motor (58) and two side plates (62) fixedly installed on the inner bottom end surface of the U-shaped frame (1), a limiting connecting rod (63) is fixedly arranged between the middle parts of the opposite side tops of the two side plates (62), and a flip plate (64) is also arranged between the two side plates (62), one end of the flip plate (64) is horizontally penetrated by a through groove (613), and the limiting connecting rod (63) is movably arranged inside the through groove (613). The top surface of the flip plate (64) is fixedly provided with ear plate frames (65) on both sides of one end close to the through groove (613), and the tops of the two ear plate frames (65) are hinged with vertically arranged vertical rods (66), and a through hole (67) is vertically penetrated at the position of the top of the mounting plate corresponding to the vertical rod (66), and the tops of the two vertical rods (66) are movable through the inside of the through hole (67) arranged at the corresponding position, and a horizontal bar (68) is fixedly provided between the tops of the two vertical rods (66), and the side of the horizontal bar (68) facing the dust concentration sensor (4) is fixedly provided with A cleaning brush (69), one side of the flip plate (64) away from the through groove (613) is fixedly connected to a cross bar (610), one end of the cross bar (610) away from the flip plate (64) is fixedly connected to a baffle (611), and the baffle (611) and the flip plate (64) are arranged in the same plane, a spring (612) is arranged at the middle of the bottom of the cross bar (68), and the two ends of the spring (612) are respectively fixedly connected to the bottom end surface of the cross bar (68) and the top end surface of the mounting plate; the inner bottom end surfaces of the two guide grooves (53) are both provided with The guide blocks (56) are provided with an inclined surface inclined inwardly; an inclined block (7) having an axial cross section of a right triangle is fixedly provided on one side of the bottom end surface of the two guide blocks (56) close to the slider (55), and the inclined surface of the inclined block (7) is arranged parallel to the inclined surface on the guide groove (53) at the corresponding position, and a cleaning brush (8) is fixedly provided on one end of the inclined surface of the inclined block (7); both sides of the bottom end of the slider (55) and both side walls of the bottom end of the inner cavity of the slide groove (54) are arranged as a constricted structure, and a plurality of leakage holes (9) are vertically penetrated in the middle of the inner cavity bottom end surface of the slide groove (54).

2. A dust concentration measuring device for occupational health detection in the mining industry according to claim 1, characterized in that: The sliding block (55) and the two side walls at the bottom of the sliding groove (54) are both provided with an arc-shaped structure that is recessed toward one side of the leakage hole (9).

3. A dust concentration measuring device for occupational health detection in the mining industry according to claim 2, characterized in that: A plurality of arc grooves (10) are provided in the middle of the top end surface and the middle of the bottom end surface of the two guide grooves (53), and a ball (11) is rollingly embedded in the interior of each arc groove (10).

4. A dust concentration measuring device for occupational health detection in the mining industry according to claim 3, characterized in that: A mesh cylinder (12) sleeved on the outside of the driving motor (58) is fixedly provided on one side of the U-shaped frame (1) on which the driving motor (58) is mounted, and a plurality of concentrically arranged arc-shaped through-holes (14) are penetrated through the side of the U-shaped frame (1) on which the driving motor (58) is mounted, the plurality of through-holes (14) are all located in the inner area of ​​the mesh cylinder (12), and a mesh plate (15) is fixedly mounted on one end of each through-hole (14) away from the driving motor (58), and an impeller (13) is fixedly sleeved on the outer peripheral surface of the shaft (59) at a position between the driving gear (510) and the driving motor (58).

5. A dust concentration measuring device for occupational health detection in the mining industry according to claim 4, characterized in that: A straight bar (16) is fixedly provided on the outer peripheral surface of the shaft rod (59) at a position between the impeller (13) and the drive motor (58) and close to the inner side wall of the U-shaped frame (1); a cleaning brush three (17) is fixedly provided on one end of the straight bar (16) away from the shaft rod (59); and the cleaning brush three (17) is arranged on a side of the straight bar (16) away from the impeller (13).

6. A dust concentration measuring device for occupational health detection in the mining industry according to claim 5, characterized in that: The inner bottom end surface of the U-shaped frame (1) is configured as a convex arc surface.

7. A dust concentration measurement method for occupational health testing in the mining industry, characterized in that: The dust concentration is measured by using the dust concentration measuring device as described in any one of claims 4 to 6, which specifically includes the following steps: S1: connecting the driving motor (58) and the dust concentration sensor (4) to the power supply (2), and at the same time establishing a connection between the dust concentration sensor (4) and an external display device; S2: starting the driving motor (58) to drive the driving gear (510) to rotate, and using the driving gear (510) to mesh with the tooth block (57) on the track plate (51), so that the U-shaped frame (1) moves along the track plate (51), thereby achieving real-time dynamic measurement of dust concentration in the area; S3: When the driving motor (58) drives the driving gear (510) to rotate, it drives the push rod (61) to make a circular motion, so that the push rod (61) repeatedly presses the baffle plate (611) downward, and drives the flip plate (64) to flip around the limiting connecting rod (63) as the central axis through the cross bar (610). When the flip plate (64) flips, it drives the vertical rod (66) to move upward, thereby pushing the cross bar (68) to move upward synchronously, so that the cleaning brush (69) on the cross bar (68) can be used to clean the dust attached to the measurement area of ​​the dust concentration sensor (4), thereby improving the measurement accuracy; S4: When the driving motor (58) drives the driving gear (510) to rotate, it also drives the impeller (13) to rotate, so that the wind blown by the impeller (13) passes through the perforations (14) and blows to the working area of ​​the driving motor (58), thereby accelerating the dissipation of heat generated by the driving motor (58) and blowing away dust attached to the surface of the net cylinder (12).

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