Circulating cleaning device for bulk material belt conveyor

Abstract

The invention discloses a circulating cleaning device for a bulk material conveying belt conveyor, and belongs to the technical field of conveying belt cleaning, the circulating cleaning device comprises a camera and a processing module, the camera is installed below a conveying belt, the camera is used for collecting information data of the surface of the conveying belt, and the processing module is used for processing the information data collected by the camera. The processing module is used for calculating the area proportion of adhesion objects attached to the surface of the conveying belt and the adhesion density of the adhesion objects according to information data collected by the camera, and a spraying assembly and a scraper assembly are further arranged on the right side of the camera. According to the device, the extrusion force of the scraper on the conveying belt can be dynamically adjusted according to the density of adhered objects, so that the device can adapt to changes of different adhered objects, the cleaning process is more flexible and efficient, the risk that cleaning is not in place due to improper extrusion force or equipment failures are caused due to overlarge extrusion force is reduced, and the working efficiency is improved. And the stability and the reliability of the whole cleaning system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of conveyor belt cleaning, and more specifically, to a circulating cleaning device for a bulk material conveying belt conveyor. Background Art

[0002] In the fields of industrial production and material transportation, the conveyor belt undertakes the key task of transporting various materials from one place to another. During the actual operation of the conveyor belt, some materials will firmly adhere to the surface of the conveyor belt due to their own characteristics (such as being sticky, having a large humidity, etc.). If these adhered materials are not cleaned in time, they will continue to accumulate as the conveyor belt keeps running, thus affecting the normal operation of the conveyor belt. For example, the adherents may cause the surface of the conveyor belt to be uneven, resulting in phenomena such as material spillage and deviation during transportation, reducing the transportation efficiency; in severe cases, it may even cause problems such as the conveyor belt running off track and breaking, seriously interfering with the entire production process.

[0003] In current technologies, there are already various technical solutions for cleaning conveyor belts. For example, an intelligent bulk material conveying belt water cleaning and circulating system disclosed in a Chinese patent (application number 202010464401.8), the basic working principle in the disclosure document is that when the conveyor belt passes by, the scraper contacts the surface of the conveyor belt, and most of the relatively loose adherents are peeled off from the surface of the conveyor belt through physical friction. Subsequently, the conveyor belt is further cleaned by means of high-pressure water jetting to wash away the remaining adherents. After the cleaning is completed, the water stains remaining on the surface of the conveyor belt are also air-dried to prevent the moisture from having an adverse impact on the subsequent operation of the conveyor belt and material transportation, such as material dampness and conveyor belt slippage.

[0004] From the perspective of actual application effects, this bulk material conveying belt water cleaning and circulating system does play a role in cleaning the conveyor belt to a certain extent, effectively reducing the residue of adherents on the surface of the conveyor belt and improving the running stability of the conveyor belt and the material transportation efficiency. However, in the face of some special situations, its cleaning effect will be significantly limited.

[0005] When encountering the situation where the adhesion adheres firmly to the conveyor belt, it is often difficult to achieve an ideal cleaning effect only relying on the scraping action of the scraper. These firmly adhered adhesions may be due to the extremely strong viscosity of the material itself. In this case, the frictional force between the scraper and the conveyor belt surface may not be sufficient to overcome the bonding force between the adhesion and the conveyor belt, thus unable to completely scrape off the adhesion. To enhance the cleaning effect, it is usually considered to increase the extrusion force of the scraper on the conveyor belt. Although theoretically, increasing the extrusion force can increase the frictional force between the scraper and the conveyor belt surface, thereby improving the cleaning ability of the adhesion, in actual operation, this approach will bring a series of serious problems. On the one hand, the increase in the frictional force between the scraper and the conveyor belt will lead to an increase in the resistance suffered by the conveyor belt during operation. This will not only make the running speed of the conveyor belt unstable, affecting the continuity and accuracy of material transportation, but also may cause the driving devices of the conveyor belt (such as motors, reducers, etc.) to be overloaded, increasing energy consumption and shortening the service life of the equipment. On the other hand, excessive extrusion force will cause intense friction between the scraper and the conveyor belt surface, accelerating the wear of the scraper and the conveyor belt. After the scraper is worn, its sharpness and cleaning effect will gradually decrease, and it needs to be replaced frequently, increasing the maintenance cost of the equipment; while the wear of the conveyor belt may cause problems such as cracks and damage on its surface, and in severe cases, even the entire conveyor belt needs to be replaced. Summary of the Invention

[0006] Aiming at the problems existing in the above technology, the purpose of the present invention is to provide a circulating cleaning device for a bulk material conveyor belt, which can dynamically adjust the extrusion force of the scraper on the conveyor belt according to the density of the adhesion, enabling it to adapt to the changes of different adhesions, making the cleaning process more flexible and efficient, reducing the risk of incomplete cleaning due to inappropriate extrusion force or equipment failure caused by excessive extrusion force, and improving the stability and reliability of the entire cleaning system.

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] A circulating cleaning device for a bulk material conveyor belt, comprising a camera and a processing module. The camera is installed below the conveyor belt, and the camera is used to collect information data on the conveyor belt surface. The processing module is used for the information data collected by the camera. The processing module calculates the area ratio of the adhesion attached to the conveyor belt surface and the density of the adhesion attached according to the information data collected by the camera. A spraying component and a scraper component are also arranged on the right side of the camera, and the scraper component is located on the right side of the spraying component; The scraper assembly includes a scraper. The upper end of the scraper is in contact with the lower surface of the conveyor belt. An extrusion assembly is also installed at the lower end of the scraper assembly. The extrusion assembly is used to adjust the extrusion force between the scraper and the conveyor belt according to the adhesion density of the adherents on the surface of the conveyor belt. Moving assemblies are also installed on both sides of the scraper assembly. The moving assemblies are used to control the forward and backward movement of the scraper. The jet orifice of the jetting assembly faces the contact part between the scraper and the conveyor belt. The jetting assembly is used to control the swinging speed of the jet orifice back and forth according to the area ratio of the adherents on the surface of the conveyor belt, and is also used to control the opening size of the jet orifice according to the adhesion density of the adherents.

[0009] Further, a to-be-detected image of the detection area and a pre-shot standard reference image are obtained through a camera. Since the conveyor belt and the conveyed material have different color characteristics, the to-be-detected image and the standard reference image are segmented into pixel-level units, and the corresponding relationship between pixels and the actual physical area is established. Through image comparison and analysis, the pixel points in the to-be-detected image that are different from the standard reference image are identified as adherent pixel points. The number of identified adherent pixel points is counted, and combined with the actual physical area corresponding to each pixel point, the actual area of the adherents in the image is calculated. The calculated area of the adherents is divided by the total area of the detection area to obtain the area ratio of the adherents in the detection area. A corresponding relationship database between the area ratio and the swinging speed of the jetting assembly is established in advance. Multiple area ratio intervals and their respectively corresponding jetting assembly swinging speed parameters are stored in the corresponding relationship database. When the area ratio of the adherents in the detection area is obtained, the area ratio is matched with the area ratio intervals in the corresponding relationship database, and based on the matching result, the jetting assembly swinging speed parameter corresponding to the area ratio is retrieved from the corresponding relationship database to control the jetting assembly to swing according to the retrieved swinging speed parameter.

[0010] Further, the RGB color values of the identified adherent pixel points are obtained, and the RGB color values are converted into gray values through a preset color conversion algorithm. Based on the converted gray values, the average gray value of all adherent pixel points is calculated, and this average value is used as the quantization value of the color depth of the adherents. Aggregation degree thresholds and color depth thresholds are set in advance. For the to-be-detected sub-region, the aggregation degree of the adherent pixel points in the sub-region is calculated, and at the same time, the quantization value of the color depth of the adherent pixel points in the sub-region is obtained. When the aggregation degree of the adherent pixel points in the sub-region is greater than the aggregation degree threshold and the quantization value of the color depth of the adherent pixel points in the sub-region is greater than the color depth threshold, it is determined that the adhesion density in the sub-region is high. When it is detected that there is a region with high adhesion density, the following control strategy is executed: Control the injection component to pause the swinging action, align the injection port with the area with the highest detected adhesion density, and simultaneously perform the operation of reducing the diameter of the injection port; If there are multiple areas with the same and high adhesion density in the detection area, the injection port is preferentially aligned with the area with high adhesion density closest to the squeegee. The injection time parameter is preset. After completing the injection treatment of this area, the injection port is then controlled to adjust to the next target area; If there are multiple areas with the same and high adhesion density in the detection area, and the distances from each area to the squeegee are the same, the injection port is preferentially aligned with the area with high adhesion density closest to the injection port for treatment.

[0011] Furthermore, a corresponding relationship database between the squeegee and the cleaning position on the surface of the conveyor belt is established in advance. The database stores the coordinate range of the cleaning position corresponding to each group of squeegees. Based on the coordinate position of the adhesion density area obtained by the adhesion detection system, a matching query is performed in the corresponding relationship database to determine the target squeegee responsible for cleaning the adhesion density area; Obtain the color depth value of the adhesion in the adhesion density area, perform a difference calculation with the pre-calculated average gray value, calculate the extrusion force value that the squeegee needs to apply to the surface of the conveyor belt based on the difference, and drive the squeegee to process the surface of the conveyor belt according to the calculated extrusion force through the extrusion component.

[0012] Furthermore, a reference image of the detection area of the conveyor belt in a clean state is collected in advance. The reference image is divided into several reference areas. The actual detection area under the camera is divided into several detection sub-areas corresponding to the number, shape, and position of the reference areas, and it is ensured that the number of detection sub-areas is the same as the number of injection components, and a control association relationship between each injection component and the corresponding detection sub-area is established; A detection time threshold is preset. If no adhesion is detected in a certain detection sub-area within the detection time threshold, the adjacent detection sub-area with a large adhesion area ratio is re-divided into two sub-areas, and the control area of the injection component is reconfigured. The injection component corresponding to the adjacent detection sub-area with a large adhesion area ratio and the injection component corresponding to the detection sub-area where no adhesion is detected are respectively controlled to re-divide the two sub-areas; If no adhesion is detected in two adjacent detection sub-areas within the detection time threshold, the two adjacent detection sub-areas are fused into a new detection area.

[0013] Furthermore, the injection component includes a nozzle pipe. A motor one is installed at the lower end of the nozzle pipe. A sliding block is installed at the lower end of the motor one. A cylinder is fixedly connected to the lower end of the sliding block. The motor one is used to drive the nozzle pipe to swing. A hose is fixedly connected to the left end of the nozzle pipe; The right end of the spray head pipe is fixedly connected with a flexible leather pipe, the right end of the flexible leather pipe is fixedly connected with a spray nozzle pipe, the side wall and the lower end wall of the spray nozzle pipe are magnetic conductive plates, a plurality of flexible leather strips are fixedly connected between the magnetic conductive plates, the upper end wall of the spray nozzle pipe is a flexible leather piece, a coil is sleeved outside the spray head pipe, an iron core is arranged inside the spray head pipe, and connecting columns are fixedly connected between the iron core and the inner wall of the spray head pipe.

[0014] Further, the extrusion assembly includes an electromagnet, a permanent magnet block is arranged above the electromagnet, a pressure sensor is installed at the upper end of the permanent magnet block, and the scraper is installed at the upper end of the pressure sensor.

[0015] Further, the moving assembly includes a limiting frame, a plurality of the scrapers are sleeved inside the limiting frame, a plurality of movable holes are respectively formed in the left and right side walls of the limiting frame, limiting columns are arranged inside the movable holes, one end of each limiting column is fixedly connected with a scraper, connecting rods are fixedly connected to the front and rear ends of the limiting frame respectively, one end of one of the connecting rods far away from the limiting frame is fixedly connected with a spring, the other end of the other connecting rod far away from the limiting frame is in contact with a cam, a second motor is installed at the lower end of the cam, support frames are further arranged at the front and rear ends of the limiting frame, the spring is arranged inside the corresponding support frame and is fixedly connected with the inner wall of the support frame, and the second motor is installed inside the corresponding support frame.

[0016] Further, a splash-proof plate is arranged outside the scraper assembly and the spraying assembly, a confluence cover is fixedly connected to the lower end of the splash-proof plate, a drain pipe is fixedly connected to the lower end of the confluence cover, a water tank is arranged at the lower end of the drain pipe, and the lower end of the drain pipe extends into the water tank; A first support plate is fixedly connected to the lower ends of a plurality of the electromagnets, a second support plate is fixedly connected to the lower end of the camera, a third support plate is installed at a position corresponding to the cylinder on the inner wall of the splash-proof plate, a plurality of concave grooves are formed in the third support plate, the cylinder is installed in the concave grooves, the front and rear ends of the first support plate and the second support plate are fixedly connected with the inner wall of the splash-proof plate, support columns are fixedly connected between the inner wall of the splash-proof plate and the water distribution box, the connecting rod movably penetrates through the side wall of the splash-proof plate, and the support frame is fixedly connected with the outer wall of the splash-proof plate.

[0017] Further, a water pump is installed outside the water tank, a filter screen is installed inside the water tank, the water tank is divided into two spaces by the filter screen, the drain pipe extends into one of the spaces, the water inlet of the water pump is communicated with the other space inside the water tank, a water guide pipe is fixedly connected to the water outlet of the water pump, the upper end of the water guide pipe is connected with the water distribution box, and a sewage pipe is installed on the side wall of the space where the drain pipe is inserted into the water tank.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) According to the density of the adherents, this solution can dynamically adjust the extrusion force of the scraper on the conveyor belt, enabling it to adapt to different changes in adherents, making the cleaning process more flexible and efficient, reducing the risk of incomplete cleaning due to inappropriate extrusion force or equipment failures caused by excessive extrusion force, and improving the stability and reliability of the entire cleaning system.

[0019] (2) According to the different results of the detection sub-regions, this solution can dynamically divide the sub-regions, merge the sub-regions that have been continuously detected as clean into a new detection area for subsequent unified calculation and processing, and re-divide the areas where adherents often appear, and reconfigure the control area of the spraying components. In this way, the cleaning area can be more finely controlled, improving the pertinence and efficiency of cleaning.

[0020] (3) When there are multiple areas with the same and high density of adherents in the detection area, the device will give priority to cleaning the area closest to the scraper to reduce the possibility of adherents running to the scraper along with the conveyor belt, thereby avoiding increasing the burden on the scraper, ensuring the cleaning effect, and preventing the conveyor belt from running smoothly or being damaged due to the accumulation of adherents; if the distances from each high-density area to the scraper are the same, the area closest to the spray nozzle will be cleaned first to shorten the spraying distance and reduce energy loss, enabling the water flow to act on the adherents in a more efficient state and improving the overall cleaning efficiency and effect. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 1 It is the overall structure external view of the present invention; Figure 2 It is the display view inside the splash guard of the present invention; Figure 3 It is the installation schematic diagram of the water spraying component and the scraper component of the present invention; Figure 4 It is the structural schematic diagram at the water distribution box of the present invention; Figure 5 It is the structural schematic diagram at the spray head pipe of the present invention; Figure 6 It is the sectional view inside the spray head pipe of the present invention; Figure 7 It is the structural schematic diagram at the concave groove of the present invention; Figure 8Schematic diagram of the installation of the scraper and the limit frame of the present invention; Figure 9 Schematic diagram of the structure at the limit frame of the present invention; Figure 10 Schematic diagram of the disassembly of the electromagnet and the permanent magnet block of the present invention; Figure 11 Schematic diagram of the installation of the splash guard and the current collecting cover of the present invention.

[0023] Description of the reference numerals in the figure: 1. Camera; 2. Scraper; 3. Sprinkler pipe; 4. Motor 1; 5. Iron core; 6. Connecting column; 7. Coil; 8. Soft leather tube; 9. Soft leather piece; 10. Magnetic conduction plate; 11. Soft leather strip; 12. Hose; 13. Water distribution box; 14. Water conduit; 15. Water pump; 16. Water tank; 17. Sewage pipe; 18. Permanent magnet block; 19. Electromagnet; 20. Support plate 1; 21. Limit post; 22. Limit frame; 23. Movable hole; 24. Pressure sensor; 25. Cam; 26. Motor 2; 27. Connecting rod; 28. Spring; 29. Support frame; 30. Splash guard; 31. Current collecting cover; 32. Drain pipe; 33. Filter screen; 34. Support plate 2; 35. Support column; 36. Support plate 3; 37. Concave groove; 38. Cylinder; 39. Sliding block. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; 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.

[0025] Please refer to Figures 1 to 11 , a circulating cleaning device for a bulk material conveying belt conveyor, including a camera 1 and a processing module. The camera 1 is installed below the conveyor belt. The camera 1 is used to collect information data on the surface of the conveyor belt. The processing module is used for the information data collected by the camera 1. The processing module calculates the area ratio and the adhesion density of the adhesion on the surface of the conveyor belt according to the information data collected by the camera 1. A spraying assembly and a scraper assembly are further arranged on the right side of the camera 1. The scraper assembly is located on the right side of the spraying assembly.

[0026] The scraper assembly includes a scraper 2. The upper end of the scraper 2 is in contact with the lower surface of the conveyor belt. An extrusion assembly is further installed at the lower end of the scraper assembly. The extrusion assembly is used to adjust the extrusion force between the scraper 2 and the conveyor belt according to the adhesion density of the adhesion on the surface of the conveyor belt. Moving assemblies are further installed on both sides of the scraper assembly. The moving assemblies are used to control the forward and backward movement of the scraper 2; The jet orifice of the jetting assembly faces the part where the scraper 2 contacts the conveyor belt. The jetting assembly is used to control the swinging speed of the jet orifice back and forth according to the proportion of the area where the adhesions adhere to the surface of the conveyor belt, and the jetting assembly is also used to control the opening size of the jet orifice according to the density of the adhesions. The jetting assembly includes a nozzle pipe 3. A first motor 4 is installed at the lower end of the nozzle pipe 3. The first motor 4 is used to drive the nozzle pipe 3 to swing. A flexible hose 12 is fixedly connected to the left end of the nozzle pipe 3; a flexible leather tube 8 is fixedly connected to the right end of the nozzle pipe 3. The right end of the flexible leather tube 8 is fixedly connected to a nozzle pipe. The side wall and the lower end wall of the nozzle pipe are magnetic conductive plates 10. Flexible leather strips 11 are fixedly connected between multiple groups of magnetic conductive plates 10. The upper end wall of the nozzle pipe is a flexible leather piece 9. A coil 7 is sleeved outside the nozzle pipe 3. An iron core 5 is arranged inside the nozzle pipe 3. Connecting columns 6 are fixedly connected between the iron core 5 and the inner wall of the nozzle pipe 3. A water tank 16 is arranged below the conveyor belt. A water pump 15 is installed outside the water tank 16. A filter screen 33 is installed inside the water tank 16. The water tank 16 is divided into two spaces by the filter screen 33. The water inlet of the water pump 15 is communicated with the inside of the water tank 16. A water guide pipe 14 is fixedly connected to the water outlet of the water pump 15. The upper end of the water guide pipe 14 is connected to a water distribution box 13. A sliding block 39 is installed at the lower end of the first motor 4. A cylinder 38 is fixedly connected to the lower end of the sliding block 39.

[0027] During operation, the conveyor belt moves in a cycle. The water pump 15 pumps the water in the water tank 16, and then transports it to the water distribution box 13 through the water guide pipe 14. The water in the water distribution box 13 is then distributed into the corresponding flexible hoses 12, and flows into the nozzle pipe 3 and the flexible leather tube 8 in sequence along the flexible hoses 12. The right end of the flexible leather tube 8 is fixedly connected to a nozzle pipe, and finally shoots out from the nozzle pipe and sprays onto the scraper 2. By the impact of the water flow on the lower surface of the conveyor belt, the adhesions on the surface of the conveyor belt are cleaned by the water flow, and the water flow can also moisten the adhesions on the surface of the conveyor belt. The moistened adhesions are convenient for the scraper 2 to scrape off.

[0028] During the conveying operation, the image to be detected in the detection area is obtained through the camera 1, as well as the pre-shot standard reference image. The conveyor belt and the conveyed material have different color characteristics. For example, the material is black or gray, and the conveyor belt can be blue or green, which facilitates the later identification of the adhesives sticking to the surface of the conveyor belt. The image to be detected and the standard reference image are segmented into pixel-level units, and the actual physical area corresponding to each pixel point is calculated in advance. Then, the corresponding relationship between pixels and the actual physical area is established. Through image comparison and analysis, the pixel points in the image to be detected that are different from the standard reference image are identified as adhesive pixel points. The number of identified adhesive pixel points is counted, and combined with the actual physical area corresponding to each pixel point, the actual area of the adhesive in the image is calculated. The calculated area of the adhesive is divided by the total area of the detection area to obtain the area ratio of the adhesive in the detection area. The present invention also pre-establishes a corresponding relationship database between the area ratio and the swing speed of the spraying assembly. The corresponding relationship database stores multiple area ratio intervals and their respectively corresponding spraying assembly swing speed parameters. When the area ratio of the adhesive in the detection area is obtained, the area ratio is matched with the area ratio intervals in the corresponding relationship database, and based on the matching result, the spraying assembly swing speed parameter corresponding to the area ratio is retrieved from the corresponding relationship database to control the spraying assembly to swing according to the retrieved swing speed parameter. For example, when the area ratio of the adhesive in the detection area is larger, the system will correspondingly drive the nozzle pipe 3 to swing through the motor 1 and increase the swing speed. The purpose of this is to enable the spraying assembly to rinse each adhesive in the detection area multiple times as much as possible, and let the water stay on the surface of the adhesive for a longer time, so as to achieve a better moisturizing and cleaning effect and effectively remove the adhesive.

[0029] In some embodiments of the present invention, the RGB color values of the identified adhesive pixel points are obtained, and the RGB color values are converted into gray values through a preset color conversion algorithm; based on the converted gray values, the average gray value of all adhesive pixel points is calculated, and this average value is used as the quantization value of the adhesive color depth; an aggregation threshold and a color depth threshold are preset in advance. For the sub-area to be detected, the aggregation degree of the adhesive pixel points in this sub-area is calculated, and at the same time, the quantization value of the adhesive color depth of the adhesive pixel points in this sub-area is obtained. When the aggregation degree of the adhesive pixel points in this sub-area is greater than the aggregation threshold and the quantization value of the adhesive color depth of the adhesive pixel points in this sub-area is greater than the color depth threshold, it is determined that the adhesive density in this sub-area is high; When an area with a high adhesive density is detected, the following control strategy is executed: The spray assembly is controlled to pause the swinging action, and the spray port is aligned with the detected area with the highest density of adhesion, and the spray port is reduced in diameter at the same time. The specific reduction operation is to energize the coil 7, and the current flowing through the coil 7 is direct current. After the coil 7 is energized, the iron core 5 will generate magnetism, and then the iron core 5 will magnetically attract the magnetic plate 10. The magnetic plate 10 can be made of iron, cobalt, nickel, or an alloy made of a mixture of iron, cobalt, nickel and some other metals. The magnetic plate 10 will be firmly attracted by the iron core 5, so that only the gap between the soft leather sheet 9 and the iron core 5 can be used for water flow to flow through, realizing the reduction operation of the nozzle pipe. When the nozzle pipe is reduced in diameter, the impact force of the water flow flowing out will become greater, which is convenient for the water flow to impact off the high-density adhesion, such as impacting large pieces of adhesion into small pieces of adhesion, so that it is convenient for the scraper 2 to clean. In addition, the sliding block 39 is controlled to move up and down by the extension and contraction of the cylinder 38, thereby controlling the nozzle tube 3 to move up and down, and then the motor 4 drives the nozzle tube 3 to swing left and right, so that the nozzle tube 3 can be controlled at multiple angles.

[0030] If there are multiple areas with the same and high density of adhesions in the detection area, the injection port is preferentially aimed at the high-density adhesion area closest to the scraper 2, and the injection time parameters are pre-set. After completing the injection processing of this area, the injection port is controlled to adjust to the next target area. This operation can clean the area in time, because if the adhesions in the area close to the scraper 2 are not cleaned in time, they may reach the scraper 2 faster as the conveyor belt runs, increasing the burden of the scraper 2, and even causing the scraper 2 to have a poor cleaning effect. Cleaning this area first can avoid this situation, making the cleaning work more efficient and orderly, and reducing the impact of adhesions on the subsequent conveyor belt operation and cleaning links. In addition, timely cleaning of high-density adhesion areas close to the scraper 2 can prevent adhesions from accumulating between the conveyor belt and the scraper 2, and avoid problems such as poor operation, jamming, or even damage of the conveyor belt due to excessive adhesions.

[0031] If there are multiple areas with the same and high density of adhesions in the detection area, and the distances between each area and the scraper 2 are the same, the injection port is preferentially aimed at the area with high adhesion density closest to the injection port for processing, which can reduce the distance from the injection port to the target area. The shorter the injection distance, the smaller the energy loss during the injection process, which can enable the injected water to act on the adhesions in a more effective state, thereby improving the cleaning effect.

[0032] In some embodiments of the present invention, a reference image of the conveyor belt detection area in a clean state is collected in advance. The reference image is segmented into several reference areas. The actual detection area under the camera 1 is segmented into several detection sub-areas corresponding to the number, shape, and position of the reference areas, and it is ensured that the number of detection sub-areas is the same as the number of spraying components. A control association relationship between each spraying component and the corresponding detection sub-area is established, so that each spraying component can perform a cleaning operation on a specific detection sub-area; A detection time threshold is preset in advance. During the detection process, each detection sub-area is monitored in real time. If no adhesion is detected in a certain detection sub-area within the detection time threshold, it means that there is less adhesion in this area. The adjacent detection sub-area with a large adhesion area ratio is re-segmented into two sub-areas, and the control area of the spraying component is reconfigured. The spraying component corresponding to the adjacent detection sub-area with a large adhesion area ratio and the spraying component corresponding to the detection sub-area where no adhesion is detected are respectively used to control the two re-segmented sub-areas. In this way, the cleaning area can be controlled more precisely, and the pertinence and efficiency of cleaning can be improved; If no adhesion is detected in two adjacent detection sub-areas within the detection time threshold, it indicates that these two areas may be relatively clean as a whole and do not require overly fine division and independent control. Then, these two adjacent detection sub-areas are merged into a new detection area to facilitate subsequent unified calculation and processing and simplify the control process.

[0033] In some embodiments of the present invention, a corresponding relationship database between the scraper 2 and the cleaning position on the conveyor belt surface is established in advance. The database stores the coordinate range of the cleaning position corresponding to each group of scrapers 2. Based on the coordinate position of the adhesion density area obtained by the adhesion detection system, a matching query is performed in the corresponding relationship database to determine the target scraper 2 responsible for cleaning this adhesion density area; the color depth value of the adhesion in the adhesion density area is obtained, and a difference calculation is performed with the pre-calculated average gray value. Based on the difference, the extrusion force value that the scraper 2 needs to apply to the conveyor belt surface is calculated, and the extrusion component drives the scraper 2 to process the conveyor belt surface according to the calculated extrusion force.

[0034] The extrusion component includes an electromagnet 19. A permanent magnet block 18 is arranged above the electromagnet 19. A pressure sensor 24 is installed at the upper end of the permanent magnet block 18. The scraper 2 is installed at the upper end of the pressure sensor 24.

[0035] By adopting the above technical solution, the specific calculation method can be operated as follows. First, determine the maximum extrusion force that the scraper 2 can exert on the conveyor belt. This extrusion force is determined under the condition of ensuring the stable transmission of the conveyor belt. Then, determine the color depth value of the adhesive. The darker the color of the adhesive, the more the amount of adhesive aggregates at that place and the higher the density, that is, the higher the density of the detected adhesive. Compared with the low-density adhesive, it is more difficult to clean. Determine how much the maximum difference can be between the color depth value of the determined adhesive and the average gray value calculated in advance, obtain the maximum extrusion force value and the maximum difference, and then divide the maximum extrusion force value by this maximum difference to obtain an extrusion force control coefficient. Then, each time a detection is made, multiply the obtained difference by this extrusion force control coefficient to obtain the extrusion force that the scraper 2 needs to exert on the conveyor belt. The calculation of the above-provided extrusion force control coefficient is relatively simple, and a more appropriate extrusion force control coefficient can also be determined according to different materials of the conveyed material, the viscosity of the material, the material of the conveyor belt, etc.

[0036] When it is necessary to adjust the extrusion force of the scraper 2 on the conveyor belt, the electromagnet 19 corresponding to the target scraper 2 is energized. When the electromagnet 19 is energized, it will generate magnetism. Since the initial state of the electromagnet 19 and the permanent magnet block 18 is in contact setting, when the electromagnet 19 is energized, the adjacent surfaces of the electromagnet 19 and the permanent magnet block 18 are the same magnetic poles, and the magnetic repulsion force of the electromagnet 19 will push the permanent magnet block 18 to move upward. The permanent magnet block 18 presses the pressure sensor 24, and at the same time, the pressure sensor 24 presses the lower end of the scraper 2, and the upper end of the scraper 2 will change the extrusion force on the conveyor belt. At this time, by detecting whether the pressure sensor 24 reaches the calculated extrusion force, when the pressure value detected by the pressure sensor 24 reaches the preset extrusion force, stop increasing the current magnitude applied to the electromagnet 19. This dynamic adjustment method of the scraper 2 can adapt to the changes of different adhesives, making the cleaning process more flexible and efficient, reducing the risk of incomplete cleaning due to inappropriate extrusion force or equipment failure caused by excessive extrusion force, and improving the stability and reliability of the entire cleaning system.

[0037] In some embodiments of the present invention, the moving assembly includes a limit frame 22. A plurality of groups of scrapers 2 are sleeved inside the limit frame 22. A plurality of groups of movable holes 23 are respectively opened on the left and right side walls of the limit frame 22. A limit post 21 is arranged in the movable hole 23. One end of the limit post 21 is fixedly connected to the scraper 2. Connecting rods 27 are fixedly connected to both the front and rear ends of the limit frame 22. One end of one group of connecting rods 27 away from the limit frame 22 is fixedly connected to a spring 28, and the other group of connecting rods 27 is in contact with a cam 25 at the end away from the limit frame 22. A second motor 26 is installed at the lower end of the cam 25. Support frames 29 are also arranged at the front and rear ends of the limit frame 22. The spring 28 is arranged inside the corresponding support frame 29 and is fixedly connected to the inner wall of the support frame 29. The second motor 26 is installed inside the corresponding support frame 29.

[0038] Since multiple sets of scraping blades 2 are provided in the present invention, there is a certain gap between the scraping blades 2. If there are impurities in the part of the conveyor belt corresponding to the gap, the scraping blades 2 cannot clean it. In the present invention, the motor two 26 drives the cam 25 to rotate. When the cam 25 rotates, it will squeeze the corresponding connecting rod 27. The connecting rod 27 pushes the limit frame 22 and squeezes the spring 28. During the process of the cam 25 rotating and squeezing the connecting rod 27, through the continuous compression and reset of the spring 28, the limit frame 22 can move left and right. When the limit frame 22 moves left and right, the limit frame 22 drives the limit post 21 through the aperture of the movable hole 23, and drives the scraping blade 2 through the limit post 21, so that the scraping blade 2 moves left and right, thus avoiding the problem of incomplete cleaning caused by the gap between multiple sets of scraping blades 2. In addition, when the scraping blade 2 contacts the adhesion, through the continuous left and right movement of the scraping blade 2, it is also convenient for the scraping blade 2 to clean the adhesion, improving the cleaning efficiency and cleaning effect.

[0039] In some embodiments of the present invention, a splash guard 30 is provided outside the scraping blade assembly and the spraying assembly. The lower end of the splash guard 30 is fixedly connected with a confluence cover 31. The lower end of the confluence cover 31 is fixedly connected with a drain pipe 32. The lower end of the drain pipe 32 is provided with a water tank 16. The lower end of the drain pipe 32 extends into the water tank 16; The lower ends of multiple sets of electromagnets 19 are fixedly connected with a support plate one 20. The lower end of the camera 1 is fixedly connected with a support plate two 34. The lower ends of multiple sets of motors one 4 are fixedly connected with a support plate three 36. At the position corresponding to the air cylinder 38 on the inner wall of the splash guard 30, a support plate three 36 is installed. Multiple concave grooves 37 are formed on the support plate three 36. The air cylinder 38 is installed in the concave grooves 37. The front and rear ends of the support plate one 20 and the support plate two 34 are fixedly connected with the inner wall of the splash guard 30. A support column 35 is fixedly connected between the inner wall of the splash guard 30 and the water distribution box 13. The connecting rod 27 movably penetrates the side wall of the splash guard 30. The support frame 29 is fixedly connected with the outer wall of the splash guard 30.

[0040] The water tank 16 is divided into two spaces by a filter screen 33. The drain pipe 32 extends into one of the spaces. The water inlet of the water pump 15 is communicated with the other space in the water tank 16. A water guide pipe 14 is fixedly connected to the water outlet of the water pump 15. A sewage pipe 17 is installed on the side wall of the space where the drain pipe 32 is inserted in the water tank 16.

[0041] By adopting the above technical solution, the water flow ejected by the ejection assembly will be blocked by the splash guard 30 when it splashes, which can effectively avoid water splashing. The splashed water and the mixed adhesives will flow downward along the inner wall of the splash guard 30 and finally flow into the confluence cover 31, and then drain into the corresponding space in the water tank 16 along the drain pipe 32. Since the water tank 16 is divided into two spaces by the filter screen 33, the water in the space where the drain pipe 32 is located is turbid, and the water in the other space filtered by the filter screen 33 is clean. The water pump 15 pumps the clean water and conveys it into the ejection assembly. When it is necessary to discharge the turbid water, only need to open the sewage pipe 17.

[0042] It should also be noted that after the conveyor belt is cleaned by the scraper 2, a drying device can be installed at the right end of the splash guard 30, such as installing a sponge roller to make it contact with the lower surface of the conveyor belt to remove the water marks on the surface of the conveyor belt. Then, a blower can be installed at the right end of the sponge roller. By blowing the blower towards the lower surface of the conveyor belt, effective drying treatment can be carried out. An electric heating element can also be installed in the blower to dry the lower surface of the conveyor belt by hot air, thereby improving the drying speed.

[0043] The above is only the preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and all should be covered by the protection scope of the present invention.

Claims

1. A circulating cleaning device for a bulk material conveyor belt, comprising a camera (1) and a processing module, characterized in that: The camera (1) is installed below the conveyor belt. The camera (1) is used to collect information data on the surface of the conveyor belt. The processing module processes the information data collected by the camera (1). The processing module calculates the area ratio of the adhesion on the surface of the conveyor belt and the density of the adhesion based on the information data collected by the camera (1). A spraying component and a scraping component are also arranged on the right side of the camera (1), and the scraping component is located on the right side of the spraying component; The scraping component includes a scraper (2). The upper end of the scraper (2) is in contact with the lower surface of the conveyor belt. An extrusion component is also installed at the lower end of the scraping component. The extrusion component is used to adjust the extrusion force between the scraper (2) and the conveyor belt according to the density of the adhesion on the surface of the conveyor belt. Moving components are also installed on both sides of the scraping component. The moving components are used to control the forward and backward movement of the scraper (2); The jet orifice of the spraying component faces the part where the scraper (2) contacts the conveyor belt. The spraying component is used to control the swinging speed of the jet orifice back and forth according to the area ratio of the adhesion on the surface of the conveyor belt. The spraying component is also used to control the opening size of the jet orifice according to the density of the adhesion; 2. The circulating cleaning device for a bulk material conveyor belt according to claim 1, wherein: An image to be detected in the detection area and a pre-shot standard reference image are obtained through the camera (1). Since the conveyor belt and the conveyed material have different color characteristics, the image to be detected and the standard reference image are segmented into pixel-level units, and the corresponding relationship between pixels and the actual physical area is established. Through image comparison and analysis, the pixel points in the image to be detected that are different from the standard reference image are identified as adhesion pixel points. The number of identified adhesion pixel points is counted. Combining the actual physical area corresponding to each pixel point, the actual area of the adhesion in the image is calculated. The calculated adhesion area is divided by the total area of the detection area to obtain the area ratio of the adhesion in the detection area; A corresponding relationship database between the area ratio and the swinging speed of the spraying component is established in advance. Multiple area ratio intervals and their corresponding spraying component swinging speed parameters are stored in the corresponding relationship database; when the area ratio of the adhesion in the detection area is obtained, the area ratio is matched with the area ratio intervals in the corresponding relationship database, and based on the matching result, the spraying component swinging speed parameter corresponding to the area ratio is retrieved from the corresponding relationship database to control the spraying component to swing according to the retrieved swinging speed parameter; 3. The circulating cleaning device for a bulk material conveyor belt according to claim 2, wherein: The RGB color values of the identified adhesion pixel points are obtained, and the RGB color values are converted into gray values through a preset color conversion algorithm; based on the converted gray values, the average gray value of all adhesion pixel points is calculated, and this average value is used as the quantization value of the adhesion color depth; Preset the aggregation degree threshold and the color depth threshold. For the sub-region to be detected, calculate the aggregation degree of the adherent pixel points in this sub-region, and at the same time obtain the color depth quantization value of the adherent pixel points in this sub-region. When the aggregation degree of the adherent pixel points in this sub-region is greater than the aggregation degree threshold, and the color depth quantization value of the adherent pixel points in this sub-region is greater than the color depth threshold, it is determined that the adherent density in this sub-region is high; When it is detected that there is a region with high adherent density, execute the following control strategy: Control the spraying component to pause the swinging action, align the spraying orifice with the detected region with the highest adherent density, and at the same time perform the operation of reducing the diameter of the spraying orifice; If there are multiple regions with the same and high adherent density in the detection region, preferentially align the spraying orifice with the region with high adherent density that is closest to the squeegee (2). Preset the spraying time parameter. After completing the spraying treatment of this region, then control the spraying orifice to adjust to the next target region; If there are multiple regions with the same and high adherent density in the detection region, and the distances of each region from the squeegee (2) are the same, preferentially align the spraying orifice with the region with high adherent density that is closest to the spraying orifice for processing.

4. A circulating cleaning device for a bulk material conveyor belt according to claim 3, characterized in that: Pre-establish a corresponding relationship database between the squeegee (2) and the cleaning position on the surface of the conveyor belt. The database stores the coordinate range of the cleaning position corresponding to each group of squeegees (2). Based on the coordinate position of the adherent density region obtained by the adherent detection system, perform a matching query in the corresponding relationship database to determine the target squeegee (2) responsible for cleaning this adherent density region; Obtain the color depth value of the adherents in the adherent density region, and perform a difference calculation with the pre-calculated average gray value. Based on the difference, calculate the extrusion force value that the squeegee (2) needs to apply to the surface of the conveyor belt, and drive the squeegee (2) through the extrusion component to process the surface of the conveyor belt according to the calculated extrusion force.

5. The circulating cleaning device for a bulk material conveyor belt according to claim 4, characterized in that: Collect the reference image of the conveyor belt detection region in a clean state in advance, divide this reference image into several reference regions, divide the actual detection region under the camera (1) into several detection sub-regions that are corresponding to the reference regions in terms of quantity, shape, and position, and ensure that the number of detection sub-regions is the same as the number of spraying components, and establish the control association relationship between each spraying component and the corresponding detection sub-region; Preset the detection time threshold. If no adherents are detected in a certain detection sub-region within the detection time threshold, re-divide the adjacent detection sub-region with a large proportion of adherent area into two sub-regions, and re-configure the control area of the spraying component. The spraying component corresponding to the adjacent detection sub-region with a large proportion of adherent area and the spraying component corresponding to the detection sub-region where no adherents are detected are respectively used to control the two re-divided sub-regions; If no adherents are detected in two adjacent detection sub-regions within the detection time threshold, then fuse these two adjacent detection sub-regions into a new detection region.

6. The circulating cleaning device for a bulk material conveyor belt according to claim 5, characterized in that: The spraying assembly includes a spray head pipe (3). A first motor (4) is installed at the lower end of the spray head pipe (3). A sliding block (39) is installed at the lower end of the first motor (4). A cylinder (38) is fixedly connected to the lower end of the sliding block (39). The first motor (4) is used to drive the spray head pipe (3) to swing. A hose (12) is fixedly connected to the left end of the spray head pipe (3). A flexible hose (8) is fixedly connected to the right end of the spray head pipe (3). The right end of the flexible hose (8) is fixedly connected to a spray nozzle pipe. The side wall and the lower end wall of the spray nozzle pipe are magnetic conductive plates (10). A flexible strip (11) is fixedly connected between multiple groups of the magnetic conductive plates (10). The upper end wall of the spray nozzle pipe is a flexible sheet (9). A coil (7) is sleeved outside the spray head pipe (3). An iron core (5) is arranged inside the spray head pipe (3). Connecting columns (6) are fixedly connected between the iron core (5) and the inner wall of the spray head pipe (3).

7. A circulating cleaning device for a bulk material conveyor belt according to claim 6, characterized in that: The extrusion assembly includes an electromagnet (19). A permanent magnet block (18) is arranged above the electromagnet (19). A pressure sensor (24) is installed at the upper end of the permanent magnet block (18). A scraper (2) is installed at the upper end of the pressure sensor (24).

8. A circulating cleaning device for a bulk material conveyor belt according to claim 7, characterized in that: The moving assembly includes a limiting frame (22). Multiple groups of the scrapers (2) are sleeved inside the limiting frame (22). Multiple groups of movable holes (23) are respectively formed in the left and right side walls of the limiting frame (22). A limiting column (21) is arranged inside the movable hole (23). One end of the limiting column (21) is fixedly connected to the scraper (2). Connecting rods (27) are fixedly connected to the front and rear ends of the limiting frame (22). One end of one group of the connecting rods (27) far away from the limiting frame (22) is fixedly connected to a spring (28). The other group of the connecting rods (27) is in contact with a cam (25) at the end far away from the limiting frame (22). A second motor (26) is installed at the lower end of the cam (25). Support frames (29) are further arranged at the front and rear ends of the limiting frame (22). The spring (28) is arranged inside the corresponding support frame (29) and is fixedly connected to the inner wall of the support frame (29). The second motor (26) is installed inside the corresponding support frame (29).

9. A circulating cleaning device for a bulk material conveyor belt according to claim 8, characterized in that: A splash-proof plate (30) is arranged outside the scraper assembly and the spraying assembly. A confluence cover (31) is fixedly connected to the lower end of the splash-proof plate (30). A drain pipe (32) is fixedly connected to the lower end of the confluence cover (31). A water tank (16) is arranged at the lower end of the drain pipe (32). The lower end of the drain pipe (32) extends into the water tank (16). The lower ends of multiple groups of the electromagnets (19) are fixedly connected to a first support plate (20), the lower end of the camera (1) is fixedly connected to a second support plate (34), a third support plate (36) is installed at a position corresponding to the cylinder (38) on the inner wall of the splash guard (30), multiple concave grooves (37) are formed in the third support plate (36), the cylinder (38) is installed in the concave grooves (37), the front and rear ends of the first support plate (20) and the second support plate (34) are fixedly connected to the inner wall of the splash guard (30), support columns (35) are fixedly connected between the inner wall of the splash guard (30) and the water distribution box (13), the connecting rod (27) movably penetrates through the side wall of the splash guard (30), and the support frame (29) is fixedly connected to the outer wall of the splash guard (30).

10. The circulating cleaning device for a bulk material conveyor belt according to claim 9, wherein: A water pump (15) is installed outside the water tank (16), a filter screen (33) is installed inside the water tank (16), the water tank (16) is divided into two spaces by the filter screen (33), the drain pipe (32) extends into one of the spaces, the water inlet of the water pump (15) communicates with the other space inside the water tank (16), a water guide pipe (14) is fixedly connected to the water outlet of the water pump (15), the upper end of the water guide pipe (14) is connected to the water distribution box (13), and a sewage pipe (17) is installed on the side wall of the space where the drain pipe (32) is inserted in the water tank (16).

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