A dust explosion detection device

Abstract

The present invention relates to the technical field of dust concentration detection, and particularly relates to a dust explosion detection device, including a sampling pipe. A laser emitter and a laser receiver are symmetrically arranged inside the sampling pipe, and a blowing mechanism is arranged at one end inside the sampling pipe. An air inlet pipe with a square hole is arranged at one end inside the sampling pipe, and two groups of vibration components are symmetrically arranged inside the square hole. In the present invention, a plurality of vibration plates are arranged in an inclined arrangement, and each vibration plate is struck by a striking mechanism, so that each vibration plate generates high-frequency vibration. When humid air flows through the surfaces of the plurality of vibration plates, the dust agglomerates in the humid air will contact the vibration plates with high-frequency vibration. Under the action of the high-frequency vibration, the dust agglomerates will be quickly broken up, so that the dust agglomerates are restored into a plurality of smaller particle dusts, improving the detection accuracy of the laser emitter and the laser receiver for the dust concentration.

Description

Technical Field

[0001] The present invention relates to the technical field of dust concentration detection, and in particular to a dust explosion detection device. Background Art

[0002] Dust explosion refers to the phenomenon that combustible dust particles suspended in air or other oxidizing gases undergo a rapid combustion reaction when encountering an ignition source within a certain concentration range, and a violent pressure wave is generated in a confined space. Therefore, in working environments prone to dust generation, such as mines or workshops, it is crucial to detect the air dust concentration at locations where dust accumulates in the working environment. If the dust concentration exceeds the explosion limit, dust explosions are likely to occur, causing losses to personnel and property. Therefore, it is necessary to sample and detect the dust concentration at various locations in the working environment.

[0003] Most of the existing dust concentration detection sensors adopt the principle of optical scattering. When light irradiates on particulate matter suspended in the air, scattered light will be generated. Under the condition that the properties of the particulate matter are certain, the intensity of the scattered light of the particulate matter is proportional to its mass concentration. For example, when laser light is irradiated into the air containing dust, when the dust particles pass through the laser beam, the laser will be scattered. The sensor for receiving the laser can accurately calculate the dust concentration in the air based on the intensity and angle of the scattered light.

[0004] After retrieval, a Chinese patent with the publication number: CN118392735B discloses an air dust concentration detection device and method, including a detection box, and further including: an air inlet pipe and an air outlet pipe arranged coaxially, respectively fixedly inserted at both ends of the detection box. Among them, a detection gap is provided between the air inlet pipe and the air outlet pipe, and a dust concentration detector is fixedly installed in the detection box. The dust concentration detector includes a laser emitter and a laser receiver, and the laser emitter and the laser receiver are respectively arranged on both sides of the detection gap; a negative pressure pipe, detachably installed at the exhaust end of the air outlet pipe, and a negative pressure fan is fixedly installed in the negative pressure pipe.

[0005] Based on the above retrieval and combined with practical problems, it is found that: this dust concentration detection device cannot break up caked dust. When the air humidity in the detection environment is relatively low, the dust presents a fine particle state. However, on the contrary, when the air humidity in the detection environment increases, the water vapor in the air will form a liquid bridge on the surface of the dust particles, causing the dust to adhere to each other and form lumps, resulting in the dust particles becoming several times larger, thereby interfering with the propagation and scattering of the laser beam, causing changes in the scattered light signal received by the laser receiver, and thus resulting in inaccurate measurement results. The inaccurate data cannot truly reflect the actual dust concentration in the air, will mislead subsequent work such as safety production decision-making and environmental assessment, and the scientificity and reliability of a series of measures taken based on the detection results cannot be guaranteed. Summary of the Invention

[0006] The object of the present invention is to provide a dust explosion detection device to solve the problems put forward in the above-mentioned background technology.

[0007] The technical solution of the present invention is: a dust explosion detection device, including a sampling pipe, a laser emitter and a laser receiver are symmetrically arranged inside the sampling pipe, and a blowing mechanism is arranged at one end inside the sampling pipe. An air inlet pipe with a square hole is arranged at one end inside the sampling pipe. Two groups of vibration components are symmetrically arranged inside the square hole. Each group of vibration components includes a plurality of vibration pieces obliquely installed inside the square hole; a knocking mechanism for knocking each vibration piece to cause vibration is also included; the knocking mechanism includes a housing fixed inside the square hole between the two groups of vibration components. A plurality of rotating arms are rotatably connected through both sides of the housing. One end of each rotating arm is provided with a plurality of hammers for knocking the vibration pieces, and each rotating arm is elastically connected to the outside of the housing through an elastic mechanism. A first motor is also installed at one end inside the housing. A rotating shaft is fixed to the driving end of the first motor, and a plurality of pushing mechanisms for pushing one end of each rotating arm to rotate a certain angle are arranged on the outside of the rotating shaft.

[0008] Preferably, the elastic mechanism includes a sleeve rotatably connected to the outside of the housing and a sliding rod rotatably connected to the rotating arm. The sliding rod is slidably inserted inside the sleeve, and a convex ring is fixed to the outside end of the sliding rod. One end of the convex ring is elastically connected to one end of the sleeve through a knocking spring.

[0009] Preferably, the pushing mechanism includes a turntable fixed to the outside of the rotating shaft. A plurality of arc-shaped convex blocks arranged in a circular pattern are arranged at one end of the turntable. A slope for pushing one end of the rotating arm is arranged on one side of each arc-shaped convex block. A roller that can be rollingly adapted to the surface of the slope is rotatably connected to one end of each rotating arm close to the arc-shaped convex block.

[0010] Preferably, a vertical rod is fixed to one end of each rotating arm, and a plurality of hammers are sleeved and installed on the outside of the vertical rod.

[0011] Preferably, each vibration piece is obliquely installed inside the square hole through a connecting column, and the vibration pieces are installed inside the corresponding connecting columns through bolts inserted.

[0012] Preferably, a plurality of electric heating sheets for heating the inhaled air are equidistantly installed at a position close to the air inlet end inside the square hole, and a sweeping mechanism for cleaning the surface of each electric heating sheet is arranged at one end of the air inlet pipe.

[0013] Preferably, the scraping mechanism includes a rectangular frame fixed to one end of the intake pipe. A second motor is installed on the outer side of the rectangular frame. The driving end of the second motor is fixed with a screw rod extending to the inner side of the rectangular frame. A lifting plate is threadedly connected to the outer side of the screw rod. A plurality of extension rods are rotatably inserted into the lifting plate, and each extension rod extends into the gap between adjacent electric heating sheets. Two scrapers are symmetrically fixed on both sides of each extension rod. One end of each extension rod is fixed with an end plate, and one end of each end plate is elastically connected to the lifting plate through a torsion spring.

[0014] Preferably, two guide grooves are opened on both sides of the rectangular frame, and both ends of the lifting plate are slidably connected to the inner sides of the two guide grooves respectively.

[0015] Preferably, a glass cylinder for sealing the laser emitter and the laser receiver is installed inside the sampling pipe. And a cleaning mechanism for cleaning the inner wall of the glass cylinder is provided at one end of the inner side of the sampling pipe. The cleaning mechanism includes a first bracket fixed to one end of the inner side of the sampling pipe. A third motor is installed at the central position of the first bracket. The driving end of the third motor is fixed with an extension shaft. A plurality of rubber scraping blades for scraping the inner wall of the glass cylinder are fixed to the outer side of the extension shaft through connecting rods. The rubber scraping blades are all in a spiral structure.

[0016] Preferably, the blowing mechanism includes a second bracket fixed to the inner side of the sampling pipe near one end of the intake pipe. A fourth motor is installed at the central position of the second bracket. The driving end of the fourth motor is installed with a fan blade.

[0017] The present invention provides a dust explosion detection device through improvement. Compared with the prior art, it has the following improvements and advantages:

[0018] First: By arranging a plurality of vibration sheets arranged obliquely and knocking each vibration sheet through a knocking mechanism, high-frequency vibration is generated on each vibration sheet. When humid air flows through the surfaces of the plurality of vibration sheets, the dust agglomerates in the humid air will contact the vibration sheets with high-frequency vibration. Under the action of the high-frequency vibration, the dust agglomerates will be quickly broken, so that the dust agglomerates are restored into a plurality of smaller dust particles, thereby improving the detection accuracy of the laser emitter and the laser receiver for the dust concentration.

[0019] Second: By arranging a plurality of electric heating sheets, the humid air can be preheated before reaching the vibration sheets, so as to achieve the effect of drying the air, and the humidity of the humid air entering the square holes is appropriately reduced, which is beneficial to reducing the cohesion between the dusts in the dust agglomerates. When the dust agglomerates are vibrated by the vibration sheets, they can be broken into more uniform dust particles, ensuring the uniform distribution of the dust in the air, thereby further improving the detection accuracy.

[0020] Thirdly: In the present invention, a glass cylinder is used to seal the laser emitter and the laser receiver. The laser emitter and the laser receiver are located in the sealed space between the sampling tube and the glass cylinder. The air containing dust is blocked by the glass cylinder, so the dust will not contaminate the lens surfaces of the laser emitter and the laser receiver. Thus, the cleanliness of the lens surfaces of the laser emitter and the laser receiver is ensured, and the influence of dust contamination on the detection accuracy is avoided. At the same time, through the cleaning mechanism, the inner wall surface of the glass cylinder can be cleaned to prevent dust from accumulating on the inner wall surface of the glass cylinder and affecting the detection result. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0023] Figure 2 is a structural schematic diagram of the inside of the sampling tube in the present invention;

[0024] Figure 3 is a structural schematic diagram of the scraping mechanism in the present invention;

[0025] Figure 4 is of the present invention Figure 3 the enlarged structural schematic diagram of part A therein;

[0026] Figure 5 is the first sectional structural schematic diagram of the air inlet pipe in the present invention;

[0027] Figure 6 is a structural schematic diagram of the knocking mechanism in the present invention;

[0028] Figure 7 is of the present invention Figure 6 the enlarged structural schematic diagram of part B therein;

[0029] Figure 8 is the second sectional structural schematic diagram of the air inlet pipe in the present invention.

[0030] Reference numerals:

[0031] 1. Sampling tube; 2. Laser emitter; 3. Laser receiver; 4. Glass cylinder; 5. Intake pipe; 6. Vibration piece; 7. Connecting column; 8. Electric heating sheet; 9. Wind direction deflector; 10. Handle; 11. Square hole; 101. Housing; 102. Rotating arm; 103. Hammer; 104. Rotating shaft; 105. Turntable; 106. Inclined plane; 107. Roller; 108. Sleeve; 109. Slide bar; 110. Convex ring; 111. Tapping spring; 112. Vertical rod; 113. First motor; 114. Arc-shaped convex block; 201. Rectangular frame; 202. Second motor; 203. Screw; 204. Lifting plate; 205. Extension rod; 206. Scraper; 207. End plate; 208. Torsion spring; 209. Guide groove; 301. First bracket; 302. Third motor; 303. Extension shaft; 304. Rubber wiper; 305. Connecting rod; 401. Second bracket; 402. Fourth motor; 403. Fan blade. Detailed implementation mode

[0032] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] The present invention provides a dust explosion detection device by improvement. The technical solution of the present invention is as follows:

[0034] As Figures 1 to 8As shown in the figure, an embodiment of the present invention provides a dust explosion detection device, including a sampling pipe 1. A laser emitter 2 and a laser receiver 3 are symmetrically arranged inside the sampling pipe 1. And a blowing mechanism is arranged at one end inside the sampling pipe 1. An air inlet pipe 5 with a square hole 11 is arranged at one end inside the sampling pipe 1. Two groups of vibration components are symmetrically arranged inside the square hole 11. Each group of vibration components includes a plurality of vibration sheets 6 obliquely installed inside the square hole 11. Each vibration sheet 6 is obliquely installed inside the square hole 11 through a connecting column 7. The vibration sheets 6 are all installed inside the corresponding connecting column 7 by inserting bolts; it also includes a knocking mechanism for knocking each vibration sheet 6 to cause vibration; the knocking mechanism includes a housing 101 fixed inside the square hole 11 between the two groups of vibration components. A plurality of rotating arms 102 are rotatably connected through both sides of the housing 101. One end of each rotating arm 102 is provided with a plurality of hammers 103 for knocking the vibration sheet 6. And each rotating arm 102 is elastically connected to the outside of the housing 101 through an elastic mechanism. It also includes a first motor 113 installed at one end inside the housing 101. A rotating shaft 104 is fixed to the driving end of the first motor 113. A plurality of pushing mechanisms for pushing one end of each rotating arm 102 to rotate a certain angle are arranged on the outside of the rotating shaft 104.

[0035] Further, the elastic mechanism includes a sleeve 108 rotatably connected to the outside of the housing 101 and a sliding rod 109 rotatably connected to the rotating arm 102. The sliding rod 109 is slidably inserted inside the sleeve 108. And a convex ring 110 is fixed to the outside end of the sliding rod 109. One end of the convex ring 110 is elastically connected to one end of the sleeve 108 through a knocking spring 111;

[0036] Through the elastic mechanism, the rotating arm 102 is driven to rotate quickly in the reverse direction, achieving a rebounding effect, so that the rotating arm 102 drives a plurality of hammers 103 at one end to knock the vibration sheet 6, thereby causing the vibration sheet 6 to generate high-frequency vibration and shattering the dust agglomerates in the air.

[0037] Further, the pushing mechanism includes a turntable 105 fixed to the outside of the rotating shaft 104. A plurality of arc-shaped protrusions 114 arranged in a circular pattern are arranged at one end of the turntable 105. A slope 106 for pushing one end of the rotating arm 102 is arranged on one side of each arc-shaped protrusion 114. A roller 107 that can be rollingly adapted to the surface of the slope 106 is rotatably connected to one end of each rotating arm 102 close to the arc-shaped protrusion 114;

[0038] When the driving mechanism rotates, a thrust is applied to one end of the rotating arm 102, thereby driving the rotating arm 102 to rotate by a certain angle. As a result, the rotating arm 102 compresses the knocking spring 111 in the elastic mechanism to store elastic potential energy. After the inclined surface 106 in the driving mechanism separates from the roller 107 at one end of the rotating arm 102, the rotating arm 102 can rotate rapidly in the reverse direction, thereby knocking on the vibrating piece 6.

[0039] Furthermore, a vertical rod 112 is fixed to one end of each rotating arm 102, and a plurality of hammers 103 are sleeved and installed on the outer side of the vertical rod 112;

[0040] The plurality of hammers 103 can knock on multiple positions of the vibrating piece 6, causing the vibrating piece 6 to vibrate as a whole. Therefore, the lumps of dust in the air can be broken and decomposed more evenly.

[0041] Furthermore, a plurality of electric heating sheets 8 for heating the inhaled air are equidistantly installed at a position near the air inlet end inside the square hole 11. One end of the air inlet pipe 5 is provided with a scraping mechanism for cleaning the surface of each electric heating sheet 8. The scraping mechanism includes a rectangular frame 201 fixed to one end of the air inlet pipe 5. A second motor 202 is installed on the outer side of the rectangular frame 201. A screw rod 203 extending to the inside of the rectangular frame 201 is fixed to the driving end of the second motor 202. A lifting plate 204 is threadedly connected to the outer side of the screw rod 203. A plurality of extension rods 205 are rotatably inserted into the lifting plate 204. Each extension rod 205 extends into the gap between adjacent electric heating sheets 8 respectively. Two scraping plates 206 are symmetrically fixed to both sides of each extension rod 205. One end of each extension rod 205 is fixed with an end plate 207. One end of each end plate 207 is elastically connected to the lifting plate 204 through a torsion spring 208. Two guide grooves 209 are opened on both sides of the rectangular frame 201. The two ends of the lifting plate 204 are respectively slidably connected to the inside of the two guide grooves 209;

[0042] By setting a plurality of electric heating sheets 8, the humid air can be preheated before reaching the vibrating piece 6, thereby achieving the effect of drying the air, appropriately reducing the humidity of the humid air entering the square hole 11, which is beneficial to reducing the adhesion force between the dusts in the dust lumps. When the dust lumps are vibrated by the vibrating piece 6, they can be broken into more uniform dust particles, ensuring the uniformity of the dust distribution in the air, and further improving the detection accuracy.

[0043] Further, a glass cylinder 4 that seals the laser emitter 2 and the laser receiver 3 is installed inside the sampling tube 1, and a cleaning mechanism for cleaning the inner wall of the glass cylinder 4 is provided at one end of the inner side of the sampling tube 1. The cleaning mechanism includes a first bracket 301 fixed at one end of the inner side of the sampling tube 1. A third motor 302 is installed at the center of the first bracket 301. An extension shaft 303 is fixed to the driving end of the third motor 302. A plurality of rubber scraping blades 304 for scraping the inner wall of the glass cylinder 4 are fixed to the outer side of the extension shaft 303 through connecting rods 305. The rubber scraping blades 304 are all in a spiral structure;

[0044] Control the operation of the third motor 302 to drive the extension shaft 303 to rotate. The extension shaft 303 drives a plurality of rubber scraping blades 304 to slide along the inner wall surface of the glass cylinder 4 through a plurality of connecting rods 305 on its outer side. Since the rubber scraping blades 304 are all in a spiral structure, when the plurality of rubber scraping blades 304 slide on the inner wall of the glass cylinder 4, the dust contaminated on the inner wall of the glass cylinder 4 can be pushed and removed to one end, preventing the dust contaminated on the inner wall of the glass cylinder 4 from blocking the laser light. At the same time, when the air humidity is relatively high, the moisture in the air will liquefy into water droplets on the inner wall surface of the glass cylinder 4. The cleaning mechanism can also scrape off the water droplets on the inner wall surface of the glass cylinder 4, further improving the detection accuracy of the laser emitter 2 and the laser receiver 3.

[0045] Further, the blowing mechanism includes a second bracket 401 fixed near one end of the inner side of the sampling tube 1 close to the air inlet pipe 5. A fourth motor 402 is installed at the center of the second bracket 401. A fan blade 403 is installed at the driving end of the fourth motor 402;

[0046] The blowing mechanism allows the air at the detection position to flow through the inner side of the sampling tube 1, facilitating the laser emitter 2 and the laser receiver 3 to detect the air dust concentration in the environment.

[0047] Working principle: When in use, the handle 10 installed on the upper side of the sampling tube 1 can be held by hand, which is convenient for carrying the device to move in the detection area. During operation, the fourth motor 402 of the blowing mechanism operates to drive the fan blade 403 to rotate. The fan blade 403 rotates to suck the air containing dust at the location into the inner side of the square hole 11 inside the air inlet pipe 5. Then the air continues to flow into the middle position inside the sampling tube 1. The laser emitter 2 and the laser receiver 3 can detect the dust concentration in the flowing air, and the air after detection flows out through the other end of the sampling tube 1;

[0048] Since a glass cylinder 4 that seals the laser emitter 2 and the laser receiver 3 is installed inside the sampling tube 1, the laser emitter 2 and the laser receiver 3 are in the sealed space between the sampling tube 1 and the glass cylinder 4. The air containing dust is blocked by the glass cylinder 4, so the dust will not contaminate the lens surfaces of the laser emitter 2 and the laser receiver 3, thus ensuring the cleanliness of the lens surfaces of the laser emitter 2 and the laser receiver 3 and avoiding the influence of dust contamination on the detection accuracy;

[0049] To ensure the cleanliness of the inner wall surface of the glass cylinder 4, a cleaning mechanism is provided to clean the inner wall of the glass cylinder 4. The third motor 302 is controlled to operate to drive the extension shaft 303 to rotate. The extension shaft 303 drives a plurality of rubber wiper blades 304 to slide along the inner wall surface of the glass cylinder 4 through a plurality of connecting rods 305 on its outer side. Since the rubber wiper blades 304 are all in a spiral structure, when the plurality of rubber wiper blades 304 slide on the inner wall of the glass cylinder 4, the dust contaminated on the inner wall of the glass cylinder 4 can be pushed to one end and removed, preventing the dust contaminated on the inner wall of the glass cylinder 4 from blocking the laser light. At the same time, when the air humidity is high, the moisture in the air will liquefy into water droplets on the inner wall surface of the glass cylinder 4, and the cleaning mechanism can also scrape off the water droplets on the inner wall surface of the glass cylinder 4, further improving the detection accuracy of the laser emitter 2 and the laser receiver 3;

[0050] When the air humidity is relatively high, water vapor in the air will form liquid bridges on the surfaces of dust particles, causing the dust to adhere to each other and form lumps, resulting in the dust particles becoming several times larger. Therefore, it will affect the detection results of the laser emitter 2 and the laser receiver 3 for the dust concentration. By arranging two sets of inclined vibration components inside the square hole 11, each vibration component includes a plurality of inclined vibration plates 6. When humid air flows through the inside of the square hole 11, the air flows along the surfaces of the vibration plates 6, and the dust lumps in the air will come into contact with the surfaces of the vibration plates 6. At the same time, control the operation of the first motor 113 of the knocking mechanism to drive the rotation of the rotating shaft 104. The rotating shaft 104 drives the rotation of a plurality of pushing mechanisms on the outside. When the pushing mechanisms rotate, a plurality of inclined surfaces 106 therein are driven to rotate. The roller 107 at one end of the rotating arm 102 can roll along the surface of the inclined surface 106. When the inclined surface 106 rotates, a thrust will be applied to the roller 107, thereby driving the rotation of the rotating arm 102 by a certain angle. Since each pushing mechanism is arranged between two adjacent rotating arms 102, when each pushing mechanism rotates, it can drive the two rotating arms 102 on both sides to rotate by a certain angle at the same time. When each rotating arm 102 rotates, it will push the sliding rod 109 of the elastic mechanism to slide into the inside of the sleeve 108, and the convex ring 110 on the outside of the sliding rod 109 applies pressure to the knocking spring 111 to compress the knocking spring 111. As the rotating shaft 104 drives the pushing mechanism to continue rotating, when the roller 107 at one end of the rotating arm 102 separates from the top of the corresponding inclined surface 106, at this time the roller 107 loses the support of the inclined surface 106, and the roller 107 will roll to the bottom end of an adjacent inclined surface 106. At this time, the knocking spring 111 of the elastic mechanism quickly releases its elastic force, and pushes the sliding rod 109 to quickly extend outwards through the convex ring 110, thereby driving the rotating arm 102 to quickly rotate in the reverse direction, so that the plurality of hammers 103 at the other end of the rotating arm 102 strike one side of the vibration plate 6 at the corresponding position, causing the vibration plate 6 to generate high-frequency vibrations. When the dust lumps come into contact with the vibration plate 6 with high-frequency vibrations, the dust lumps will be quickly broken up, so that the dust lumps are restored into multiple smaller dust particles, thereby further improving the detection accuracy of the laser emitter 2 and the laser receiver 3 for the dust concentration;

[0051] A plurality of wind direction guiding plates 9 are also equidistantly arranged inside the square hole 11 relative to one end of the electric heating sheet 8. Through the guiding action of the plurality of wind direction guiding plates 9, the air flowing through the plurality of vibration plates 6 can be evenly blown towards the inside of the glass cylinder 4, so that the air dust is evenly distributed inside the glass cylinder 4, which helps to improve the detection accuracy of the laser emitter 2 and the laser receiver 3;

[0052] In order to make the dust agglomerates be broken into small particle dust more uniformly, a plurality of electric heating sheets 8 are installed at one inner end of the square hole 11. When the external humid air enters the square hole 11, it first passes through the gaps between the plurality of electric heating sheets 8. The plurality of electric heating sheets 8 are energized to generate heat, which can heat the flowing humid air, so as to realize the function of drying the air, appropriately reduce the humidity of the humid air entering the square hole 11, which is beneficial to reducing the adhesion force between the dust in the dust agglomerates. When the dust agglomerates are vibrated by the vibrating sheet 6, they can be broken into more uniform dust particles, ensuring the uniformity of the dust distribution in the air, and thus further improving the detection accuracy;

[0053] Control the operation of the second motor 202 in the scraping mechanism to drive the screw 203 to rotate. The second motor 202 is a forward and reverse rotation motor that can automatically rotate forward and backward. Therefore, the second motor 202 can drive the screw 203 to rotate forward and backward according to the set number of turns. The screw 203 drives the lifting plate 204 to move up and down through the thread. A plurality of extension rods 205 are arranged inside the lifting plate 204. One end of each extension rod 205 is provided with a torsion spring 208. Under the elastic force of each torsion spring 208, the torsion spring 208 will apply a certain rotational torque to the end plate 207 at the corresponding position, causing the end plate 207 to rotate a certain angle in one direction. The end plate 207 drives the extension rod 205 to rotate a certain angle, and the extension rod 205 drives the two outer scrapers 206 to rotate a certain angle, so that the sides of the two scrapers 206 are respectively pressed against the surfaces of the two electric heating sheets 8 on both sides. Therefore, when the lifting plate 204 drives the plurality of extension rods 205 to move up and down, the plurality of extension rods 205 drive the outer scrapers 206 to move up and down. When the plurality of scrapers 206 move up and down, they can scrape off the dust adhered to the surface of the electric heating sheet 8, ensuring the cleanliness of the surface of the electric heating sheet 8, so that the heat generated by the electric heating sheet 8 can be conducted to the flowing air faster, quickly heating the air and the dust agglomerates therein, improving the drying speed, and thus making the dust agglomerates easier to be broken uniformly.

[0054] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dust explosion detection device, comprising a sampling pipe, a laser emitter and a laser receiver symmetrically arranged on the inner side of the sampling pipe, and a blowing mechanism arranged at one end of the inner side of the sampling pipe, characterized in that, At the inner end of the sampling tube, an intake pipe with a square hole is provided. Inside the square hole, two groups of vibration components are symmetrically arranged. Each group of vibration components includes a plurality of vibration plates obliquely installed inside the square hole; It also includes a knocking mechanism for knocking each vibration plate to cause vibration; The knocking mechanism includes a housing fixed inside the square hole between the two groups of vibration components. A plurality of rotating arms are rotatably connected through both sides of the housing. At one end of each rotating arm, a plurality of hammers for knocking the vibration plates are provided, and each rotating arm is elastically connected to the outside of the housing through an elastic mechanism. It also includes a first motor installed at one end inside the housing. A rotating shaft is fixed to the driving end of the first motor. A plurality of pushing mechanisms for pushing one end of each rotating arm to rotate a certain angle are arranged on the outside of the rotating shaft; The elastic mechanism includes a sleeve rotatably connected to the outside of the housing and a sliding rod rotatably connected to the rotating arm. The sliding rod is slidably inserted inside the sleeve, and a convex ring is fixed to the outer end of the sliding rod. One end of the convex ring is elastically connected to one end of the sleeve through a knocking spring; The pushing mechanism includes a turntable fixed to the outside of the rotating shaft. A plurality of arc-shaped convex blocks arranged in a circular pattern are provided at one end of the turntable. On one side of each arc-shaped convex block, there is an inclined surface for pushing one end of the rotating arm. At one end of each rotating arm close to the arc-shaped convex block, a roller that can be rollingly adapted to the surface of the inclined surface is rotatably connected.

2. The dust explosion detection device according to claim 1, wherein: A vertical rod is fixed to one end of each rotating arm, and a plurality of hammers are sleeved and installed on the outside of the vertical rod.

3. The dust explosion detection device according to claim 1, characterized in that: Each vibration plate is obliquely installed inside the square hole through a connecting column, and the vibration plates are installed inside the corresponding connecting column by inserting bolts.

4. The dust explosion detection device according to claim 1, characterized in that: At the position near the air inlet end inside the square hole, a plurality of electric heating plates for heating the inhaled air are equidistantly installed. At one end of the intake pipe, a scraping mechanism for cleaning the surface of each electric heating plate is provided.

5. The dust explosion detection device according to claim 4, wherein: The scraping mechanism includes a rectangular frame fixed to one end of the intake pipe. A second motor is installed on the outside of the rectangular frame. The driving end of the second motor is fixed with a screw rod extending into the inside of the rectangular frame. A lifting plate is threadedly connected to the outside of the screw rod. A plurality of extension rods are rotatably inserted inside the lifting plate. Each extension rod extends into the gap between adjacent electric heating plates respectively. On both sides of each extension rod, two scraping plates are symmetrically fixed. One end of each extension rod is fixed with an end plate. One end of each end plate is elastically connected to the lifting plate through a torsion spring.

6. The dust explosion detection device according to claim 5, wherein: Two guide grooves are opened on both sides of the rectangular frame, and both ends of the lifting plate are slidably connected to the inside of the two guide grooves respectively.

7. The dust explosion detection device according to claim 1, wherein: Inside the sampling tube, a glass cylinder for sealing the laser emitter and the laser receiver is installed. At one end inside the sampling tube, a cleaning mechanism for cleaning the inner wall of the glass cylinder is provided. The cleaning mechanism includes a first bracket fixed to one end inside the sampling tube. At the central position of the first bracket, a third motor is installed. The driving end of the third motor is fixed with an extension shaft. A plurality of rubber scraping blades for scraping the inner wall of the glass cylinder are fixed to the outside of the extension shaft through connecting rods. The rubber scraping blades are all in a spiral structure.

8. The dust explosion detection device according to claim 1, characterized in that: The blowing mechanism includes a second bracket fixed inside the sampling tube near one end of the intake pipe. At the central position of the second bracket, a fourth motor is installed. A fan blade is installed at the driving end of the fourth motor.

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