A circulating cleaning device for bulk material conveying belt conveyor

Abstract

The present invention discloses a circulating cleaning device for a bulk material conveyor belt conveyor, belonging to the field of conveyor belt cleaning technology, comprising a camera and a processing module, wherein the camera is installed below the conveyor belt, the camera is used to collect information data on the conveyor belt surface, the processing module is used to calculate the area ratio of adhesion of adhesives on the conveyor belt surface and the density of adhesion of adhesives based on the information data collected by the camera, and a spray assembly and a scraper assembly are also provided on the right side of the camera. The present invention can dynamically adjust the extrusion force of the scraper on the conveyor belt according to the density of the adhesion, so that it can adapt to the changes of different adhesions, making the cleaning process more flexible and efficient, reducing the risk of inadequate cleaning due to inappropriate extrusion force or equipment failure due to excessive extrusion force, and improving the stability and reliability of the entire cleaning system.

Description

Technical Field

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

[0002] In industrial production and material handling, conveyor belts play a crucial role in transporting various materials from one location to another. During operation, some materials, due to their inherent properties (such as stickiness and high humidity), can adhere firmly to the belt surface. If not promptly removed, these adhered materials will accumulate as the belt continues to operate, disrupting its proper function. For example, adhesion can cause the conveyor belt surface to become uneven, leading to material spillage and deviation during transport, reducing conveying efficiency. In severe cases, it can even cause the belt to deviate or break, severely disrupting the entire production process.

[0003] There are currently a variety of technical solutions for cleaning conveyor belts. For example, a Chinese patent discloses an intelligent water cleaning circulation system for bulk material conveyor belts (application number 202010464401.8). The basic working principle described in the public document is that as the conveyor belt passes, a scraper contacts the surface of the conveyor belt, and through physical friction, most of the loose adhesions are peeled off the surface of the conveyor belt. Subsequently, the conveyor belt is further cleaned using a high-pressure water jet to rinse away any remaining adhesions. After cleaning, any remaining water stains on the conveyor belt surface are air-dried to prevent the moisture from adversely affecting the subsequent operation of the conveyor belt and material transportation, such as damp materials and conveyor belt slippage.

[0004] In practical application, this bulk material conveyor belt water cleaning circulation system does indeed clean the conveyor belt to a certain extent, effectively reducing residual debris on the conveyor belt surface and improving the conveyor belt's operating stability and material conveying efficiency. However, in some special situations, its cleaning effect is significantly limited.

[0005] When adhesives are firmly adhered to the conveyor belt, relying solely on the scraper's action often fails to achieve optimal cleaning results. These firmly adhered adhesives may be due to the material's inherent viscosity. In this case, the friction between the scraper and the conveyor belt surface may not be sufficient to overcome the binding force between the adhesive and the belt, making it impossible to completely remove the adhesive. To enhance cleaning effectiveness, increasing the scraper's pressure on the conveyor belt is often considered. While increasing the pressure theoretically increases friction between the scraper and the conveyor belt, thereby improving the ability to remove adhesives, in practice, this approach can lead to a number of serious problems. On the one hand, increased friction between the scraper and the conveyor belt increases the resistance encountered by the conveyor belt during operation. This not only destabilizes the conveyor belt's movement speed, affecting the continuity and accuracy of material conveying, but can also overload the conveyor belt's drive system (such as the motor and reducer), increasing energy consumption and shortening the equipment's service life. On the other hand, excessive pressure can cause intense friction between the scraper and the conveyor belt surface, accelerating wear on both the scraper and the conveyor belt. When the scraper is worn, its sharpness and cleaning effect will gradually decrease, and it needs to be replaced frequently, which increases the maintenance cost of the equipment; and the wear of the conveyor belt may cause cracks, breakage and other problems on its surface. In severe cases, the entire conveyor belt may even need to be replaced. Summary of the Invention

[0006] In response to the problems existing in the above-mentioned technology, the purpose of the present invention is to provide a circulating cleaning device for a bulk material conveyor belt conveyor, which can dynamically adjust the extrusion pressure of the scraper on the conveyor belt according to the density of the adhesion, so that it can adapt to the changes of different adhesions, making the cleaning process more flexible and efficient, reducing the risk of inadequate cleaning due to inappropriate extrusion pressure or equipment failure due to excessive extrusion pressure, 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 conveyor, comprising a camera and a processing module, wherein the camera is mounted below the conveyor belt and is used to collect information data from the conveyor belt surface; the processing module is used to calculate the area ratio and density of adhered matter on the conveyor belt surface based on the information data collected by the camera; a spray assembly and a scraper assembly are further provided on the right side of the camera, and the scraper assembly is located to the right of the spray assembly;

[0009] The scraper assembly includes a scraper, the upper end of which contacts the lower surface of the conveyor belt. The lower end of the scraper assembly is also equipped with an extrusion assembly, which is used to adjust the extrusion force between the scraper and the conveyor belt according to the density of the adhered matter on the surface of the conveyor belt. The scraper assembly is also equipped with moving assemblies on both sides, which are used to control the scraper to move forward and backward.

[0010] The jet outlet of the injection assembly is directed toward the contact portion between the scraper and the conveyor belt. The injection assembly is used to control the speed of the jet outlet's back and forth swinging according to the area ratio of the adhesive adhered to the conveyor belt surface. The injection assembly is also used to control the opening size of the jet outlet according to the density of the adhesive adhered.

[0011] Furthermore, an image to be inspected of the inspection area and a pre-taken standard reference image are acquired through a camera, wherein the conveyor belt and the conveyed material have different color characteristics. The image to be inspected and the standard reference image are segmented into pixel-level units, and a correspondence between pixels and actual physical areas is established. Through image comparison and analysis, pixels in the image to be inspected that differ from those in the standard reference image are identified as adhesion pixels. The number of identified adhesion pixels is counted, and the actual area of the adhesion in the image is calculated based on the actual physical area corresponding to each pixel. The calculated adhesion area is divided by the total area of the inspection area to obtain the area ratio of the adhesion within the inspection area.

[0012] A correspondence database between area ratio and jet assembly swing speed is established in advance, and a plurality of area ratio intervals and their corresponding jet assembly swing speed parameters are stored in the correspondence database. After obtaining the area ratio of the adhesion in the detection area, the area ratio is matched with the area ratio interval in the correspondence database, and based on the matching result, the jet assembly swing speed parameter corresponding to the area ratio is retrieved from the correspondence database to control the jet assembly to swing according to the retrieved swing speed parameter.

[0013] Furthermore, the RGB color values of the identified adhesion pixels are obtained and converted into grayscale values using a preset color conversion algorithm; based on the converted grayscale values, the average grayscale value of all adhesion pixels is calculated, and the average value is used as a quantified value of the adhesion color depth; a concentration threshold and a color depth threshold are pre-set, and for a sub-region to be detected, the concentration of the adhesion pixels in the sub-region is calculated, and the color depth quantified value of the adhesion pixels in the sub-region is obtained simultaneously; when the concentration of the adhesion pixels in the sub-region is greater than the concentration threshold, and the color depth quantified value of the adhesion pixels in the sub-region is greater than the color depth threshold, it is determined that the adhesion density in the sub-region is high;

[0014] When an area with high density of adhesion is detected, the following control strategy is implemented:

[0015] Control the spray assembly to pause its swinging motion, align the spray port with the area with the highest density of detected adhesions, and simultaneously perform a spray port diameter reduction operation;

[0016] If there are multiple areas with the same high density of adhesives within the inspection area, the nozzle is first aimed at the area with high density of adhesives closest to the scraper. The spraying time parameters are pre-set. After the spraying treatment of this area is completed, the nozzle is controlled to adjust to the next target area.

[0017] If there are multiple areas with the same and high density of adhesions in the inspection area, and the distances between each area and the scraper are the same, the injection port is preferably aligned with the area with high adhesion density closest to the injection port for processing.

[0018] Furthermore, a database of correspondences between scrapers and conveyor belt surface cleaning positions is pre-established. The database stores the cleaning position coordinate ranges corresponding to each set of scrapers. Based on the coordinate positions of the adhesion density area obtained by the adhesion detection system, a matching query is performed in the correspondence database to determine the target scraper responsible for cleaning the adhesion density area.

[0019] The color depth value of the adhesion in the adhesion density area is obtained, and the difference is calculated with the pre-calculated average grayscale value. Based on the difference, the extrusion force value that the scraper needs to apply to the conveyor belt surface is calculated. The scraper is driven by the extrusion component to process the conveyor belt surface according to the calculated extrusion force.

[0020] Furthermore, a reference image of the conveyor belt inspection area in a clean state is collected in advance, and the reference image is divided into several reference areas. The actual inspection area under the camera is divided into several inspection sub-areas corresponding to the number, shape, and position of the reference areas, and the number of inspection sub-areas is ensured to be consistent with the number of injection components. A control association relationship is established between each injection component and the corresponding inspection sub-area.

[0021] A detection time threshold is pre-set. If no adhesion is detected in a detection sub-region within the detection time threshold, the adjacent detection sub-region with a larger adhesion area is re-divided into two sub-regions. The control areas of the ejection components are reconfigured so that the ejection components corresponding to the adjacent detection sub-region with a larger adhesion area and the ejection components corresponding to the detection sub-region where no adhesion is detected control the two re-divided sub-regions respectively.

[0022] If no adhesion is detected in two adjacent detection sub-areas within the detection time threshold, the two adjacent detection sub-areas are merged into a new detection area.

[0023] Furthermore, the spray assembly includes a nozzle pipe, a motor 1 is installed at the lower end of the nozzle pipe, a sliding block is installed at the lower end of the motor 1, a cylinder is fixedly connected to the lower end of the sliding block, the motor 1 is used to drive the nozzle pipe to swing, and a hose is fixedly connected to the left end of the nozzle pipe;

[0024] The right end of the nozzle tube is fixedly connected to a soft leather tube, and the right end of the soft leather tube is fixedly connected to a nozzle tube. The side walls and the lower end wall of the nozzle tube are magnetic conductive plates, and soft leather strips are fixedly connected between multiple groups of the magnetic conductive plates. The upper end wall of the nozzle tube is a soft leather sheet. The outside of the nozzle tube is provided with a coil, and the inside of the nozzle tube is provided with an iron core. A connecting column is fixedly connected between the iron core and the inner wall of the nozzle tube.

[0025] Furthermore, the extrusion assembly includes an electromagnet, a permanent magnet block is provided above the electromagnet, a pressure sensor is installed on the upper end of the permanent magnet block, and the scraper is installed on the upper end of the pressure sensor.

[0026] Furthermore, the moving component includes a limit frame, and multiple groups of scraper sleeves are arranged in the limit frame. Multiple groups of movable holes are opened on the left and right side walls of the limit frame. A limit column is set in the movable hole, and one end of the limit column is fixedly connected to the scraper. The front and rear ends of the limit frame are fixedly connected with connecting rods, one group of the connecting rods is fixedly connected with a spring at one end away from the limit frame, and the other group of the connecting rods is contacted with a cam at one end away from the limit frame, and the lower end of the cam is installed with motor 2. Support frames are also provided at the front and rear ends of the limit frame. The spring is set in the corresponding support frame and fixedly connected to the inner wall of the support frame, and motor 2 is installed in the corresponding support frame.

[0027] Furthermore, a splash guard is provided on the outside of the scraper assembly and the spray assembly, the lower end of the splash guard is fixedly connected to a collector cover, the lower end of the collector cover is fixedly connected to a drain pipe, the lower end of the drain pipe is provided with a water tank, and the lower end of the drain pipe extends into the water tank;

[0028] The lower ends of the multiple groups of electromagnets are fixedly connected to support plate 1, the lower end of the camera is fixedly connected to support plate 2, and the inner wall of the splash guard is installed with support plate 3 at the position corresponding to the cylinder. The support plate 3 is provided with multiple groups of concave grooves, and the cylinder is installed in the concave grooves. The front and rear ends of support plate 1 and support plate 2 are fixedly connected to the inner wall of the splash guard, and a support column is fixedly connected between the inner wall of the splash guard and the water diversion box. The connecting rod movably passes through the side wall of the splash guard, and the support frame is fixedly connected to the outer wall of the splash guard.

[0029] Furthermore, a water pump is installed on the outside of the water tank, and a filter is installed on the inside of the water tank. The water tank is divided into two spaces by the filter, and the drain pipe extends into one of the spaces. The water inlet of the water pump is connected to the other space in the water tank. A water pipe is fixedly connected to the water outlet of the water pump, and the upper end of the water pipe is connected to the water diversion box. A sewage pipe is installed on the side wall of the space where the drain pipe is inserted in the water tank.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] (1) This solution can dynamically adjust the extrusion force of the scraper on the conveyor belt according to the density of the adhered matter, so that it can adapt to the changes of different adhered matter, making the cleaning process more flexible and efficient, reducing the risk of inadequate cleaning due to inappropriate extrusion force or equipment failure due to excessive extrusion force, and improving the stability and reliability of the entire cleaning system.

[0032] (2) This solution can dynamically divide sub-areas based on the different results of the detection sub-areas. The sub-areas that have always been detected clean can be merged into a new detection area to facilitate subsequent unified calculation and processing. The areas where adhesions often appear can be re-divided and the control area of the injection assembly can be reconfigured. In this way, the cleaning area can be controlled more finely, and the targetedness and efficiency of cleaning can be improved.

[0033] (3) In this scheme, when there are multiple areas with the same and high density of adhesions in the detection area, the device will give priority to cleaning the area closest to the scraper to reduce the possibility of adhesions running along the conveyor belt to the scraper, thereby avoiding increasing the burden on the scraper, ensuring the cleaning effect, and preventing the conveyor belt from running poorly or being damaged due to the accumulation of adhesions; if the distance between each high-density area and the scraper is the same, the area closest to the injection port will be cleaned first to shorten the injection distance, reduce energy loss, and allow the water flow to act on the adhesions in a more efficient state, thereby improving the overall cleaning efficiency and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0035] Figure 1 This is an appearance view of the overall structure of the present invention;

[0036] Figure 2 A diagram showing the interior of the splash guard of the present invention;

[0037] Figure 3 Schematic diagram of the installation of the water spray assembly and the scraper assembly of the present invention;

[0038] Figure 4 This is a structural diagram of the water diversion box of the present invention;

[0039] Figure 5 This is a structural diagram of the nozzle pipe of the present invention;

[0040] Figure 6 is a cross-sectional view of the interior of the nozzle tube of the present invention;

[0041] Figure 7 This is a schematic structural diagram of the concave groove of the present invention;

[0042] Figure 8 This is a schematic diagram of the installation of the scraper and the limiting frame of the present invention;

[0043] Figure 9 It is a structural diagram of the limit frame of the present invention;

[0044] Figure 10 Schematic diagram of the separation of the electromagnet and the permanent magnet block of the present invention;

[0045] Figure 11 Schematic diagram of the installation of the splash guard and the collector cover of the present invention.

[0046] Description of the numbers in the figure:

[0047] 1. Camera; 2. Scraper; 3. Nozzle tube; 4. Motor 1; 5. Iron core; 6. Connecting column; 7. Coil; 8. Soft leather tube; 9. Soft leather sheet; 10. Magnetic plate; 11. Soft leather strip; 12. Hose; 13. Water distribution box; 14. Water pipe; 15. Water pump; 16. Water tank; 17. Drain pipe; 18. Permanent magnet; 19. Electromagnet; 20. Support plate 1; 21. Limit column; 22. Limit frame; 23. Movable hole; 24. Pressure sensor; 25. Cam; 26. Motor 2; 27. Connecting rod; 28. Spring; 29. Support frame; 30. Splash shield; 31. Confluence cover; 32. Drain pipe; 33. Filter; 34. Support plate 2; 35. Support column; 36. Support plate 3; 37. Concave groove; 38. Cylinder; 39. Sliding block. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only 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 ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0049] See also Figures 1 to 11 A circulating cleaning device for a bulk material conveyor belt conveyor includes a camera 1 and a processing module. The camera 1 is installed under the conveyor belt. The camera 1 is used to collect information data from the conveyor belt surface. The processing module is used to calculate the area ratio and density of adhesion of adhesions on the conveyor belt surface based on the information data collected by the camera 1. A spray assembly and a scraper assembly are also provided on the right side of the camera 1. The scraper assembly is located on the right side of the spray assembly.

[0050] The scraper assembly includes a scraper 2, the upper end of which contacts the lower surface of the conveyor belt. The lower end of the scraper assembly is also equipped with an extrusion assembly, which is used to adjust the extrusion force between the scraper 2 and the conveyor belt according to the density of the adhesive on the conveyor belt surface. The scraper assembly is also equipped with moving assemblies on both sides, which are used to control the forward and backward movement of the scraper 2.

[0051] The jet outlet of the injection assembly is oriented toward the contact area between the scraper 2 and the conveyor belt. The injection assembly is used to control the speed of the jet outlet's swinging back and forth according to the area ratio of the adhesion of the adhesive on the surface of the conveyor belt. The injection assembly is also used to control the opening size of the jet outlet according to the density of the adhesion of the adhesive. The injection assembly includes a nozzle tube 3, and a motor 4 is installed at the lower end of the nozzle tube 3. The motor 4 is used to drive the nozzle tube 3 to swing. The left end of the nozzle tube 3 is fixedly connected to a hose 12; the right end of the nozzle tube 3 is fixedly connected to a soft leather tube 8, and the right end of the soft leather tube 8 is fixedly connected to the nozzle tube. The side wall and the lower end wall of the nozzle tube are magnetic conductive plates 10. A soft leather strip 11 is fixedly connected between the magnetic conductive plates 10. The upper end wall of the nozzle tube is a soft leather sheet 9. The outer sleeve of the nozzle tube 3 is provided with a coil 7. The inner portion of the nozzle tube 3 is provided with an iron core 5. A connecting column 6 is fixedly connected between the iron core 5 and the inner wall of the nozzle tube 3. A water tank 16 is provided 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 connected to the interior of the water tank 16. The water outlet of the water pump 15 is fixedly connected to the water pipe 14. The upper end of the water pipe 14 is connected to the water diversion box 13. A sliding block 39 is installed at the lower end of the motor 4. The lower end of the sliding block 39 is fixedly connected to the cylinder 38.

[0052] During operation, the conveyor belt performs a circular motion, the water pump 15 draws water from the water tank 16, and then transports it to the water diversion box 13 through the water pipe 14. The water in the water diversion box 13 is then diverted to the corresponding hose 12, and flows into the nozzle pipe 3 and the soft leather tube 8 in turn along the hose 12. The right end of the soft leather tube 8 is fixedly connected to the nozzle pipe, and finally ejected from the nozzle pipe and sprayed to the scraper 2. The water flow impacts the lower surface of the conveyor belt, and the water flow cleans the adhesions on the surface of the conveyor belt. The water flow can also moisten the adhesions on the surface of the conveyor belt, and the moist adhesions are convenient for the scraper 2 to scrape off.

[0053] During conveying, camera 1 captures an image of the inspection area to be inspected, along with a pre-captured standard reference image. The conveyor belt and the conveyed material have different color characteristics. For example, if the material is black or gray, the conveyor belt can be blue or green. This facilitates the later identification of adhesives stuck to the conveyor belt surface. The image to be inspected and the standard reference image are segmented into pixel-level units. The actual physical area corresponding to each pixel is pre-calculated. A correspondence between pixels and actual physical areas is then established. Through image comparison and analysis, pixels in the image to be inspected that differ from the standard reference image are identified as adhesive pixels. The number of identified adhesive pixels is counted, and combined with the actual physical area corresponding to each pixel, the actual area of the adhesive in the image is calculated. The calculated adhesive area is divided by the total area of the inspection area to determine the percentage of the adhesive area within the inspection area. The present invention also pre-establishes a database of correspondences between area percentage and spray assembly swing speed. The correspondence database stores multiple area percentage intervals and their corresponding spray assembly swing speed parameters. After obtaining the area percentage of the adhesion within the detection area, the area percentage is matched with the area percentage intervals in the correspondence database. Based on the matching results, the spray assembly swing speed parameter corresponding to the area percentage is retrieved from the correspondence database to control the spray assembly to swing according to the retrieved swing speed parameter. For example, as the area percentage of the adhesion within the detection area increases, the system will drive the nozzle pipe 3 to swing accordingly via motor 14, and increase the swing speed. This is done to enable the spray assembly to rinse each adhesion in the detection area multiple times as much as possible, and to allow the water flow to remain on the adhesion surface for a longer time, thereby achieving a better moisturizing and cleaning effect, thereby effectively removing the adhesion.

[0054] In some embodiments of the present invention, RGB color values of identified adhesion pixels are obtained and converted into grayscale values using a preset color conversion algorithm; based on the converted grayscale values, an average grayscale value of all adhesion pixels is calculated, and the average value is used as a quantified value of the adhesion color depth; an aggregation threshold and a color depth threshold are preset, and for a sub-region to be detected, the aggregation of adhesion pixels in the sub-region is calculated, and the color depth quantified value of the adhesion pixels in the sub-region is obtained. When the aggregation of adhesion pixels in the sub-region is greater than the aggregation threshold, and the color depth quantified value of the adhesion pixels in the sub-region is greater than the color depth threshold, it is determined that the adhesion density in the sub-region is high;

[0055] When an area with high density of adhesion is detected, the following control strategy is implemented:

[0056] The spray assembly is controlled to pause its swinging motion, and the nozzle is aligned with the detected area with the highest density of adhesions, while simultaneously performing a nozzle diameter reduction operation. Specifically, the nozzle diameter reduction operation is performed by energizing the coil 7 with a direct current. After the coil 7 is energized, the iron core 5 becomes magnetic, and then the iron core 5 magnetically attracts 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 is firmly attracted by the iron core 5, so that only the gap between the soft leather sheet 9 and the iron core 5 can flow through the water, thus achieving the nozzle diameter reduction operation. As the nozzle diameter is reduced, the impact force of the outflowing water increases, which makes it easier for the water flow to impact and remove high-density adhesions, for example, breaking large pieces of adhesion into small pieces, thereby facilitating cleaning by the scraper 2. 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 up and down movement of the nozzle tube 3, and then cooperating with the motor 4 to drive the nozzle tube 3 to swing left and right, so that the nozzle tube 3 can be controlled at multiple angles.

[0057] If there are multiple areas with the same and high density of adhesions in the detection area, the nozzle 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 nozzle 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 on 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 the high-density adhesion area close to the scraper 2 can prevent adhesions from accumulating between the conveyor belt and the scraper 2, avoiding problems such as poor conveyor belt operation, jamming, or even damage due to excessive adhesions.

[0058] If there are multiple areas with the same and high density of adhesions in the detection area, and the distance between each area and the scraper 2 is the same, the injection port is preferably aimed at the area with high adhesion density closest to the injection port for processing. This 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. This allows the injected water to act on the adhesions in a more effective state, thereby improving the cleaning effect.

[0059] In some embodiments of the present invention, a reference image of the conveyor belt inspection area in a clean state is collected in advance, and the reference image is divided into a number of reference areas. The actual inspection area under the camera 1 is divided into a number of inspection sub-areas corresponding to the number, shape, and position of the reference areas, and the number of inspection sub-areas is ensured to be consistent with the number of injection components. A control association relationship is established between each injection component and the corresponding inspection sub-area, so that each injection component can perform a cleaning operation on a specific inspection sub-area.

[0060] A detection time threshold is pre-set, and during the detection process, each detection sub-area is monitored in real time. If no adhesion is detected in a detection sub-area within the detection time threshold, it indicates that there is relatively little adhesion in that area. The adjacent detection sub-area with a large proportion of adhesion is then re-divided into two sub-areas, and the control area of the spray assembly is reconfigured. The spray assembly corresponding to the adjacent detection sub-area with a large proportion of adhesion and the spray assembly corresponding to the detection sub-area without adhesion are respectively controlled in the two re-divided sub-areas. In this way, the cleaning area can be more precisely controlled, improving the targetedness and efficiency of cleaning.

[0061] If no adhesion is detected in two adjacent detection sub-areas within the detection time threshold, it indicates that the two areas may be relatively clean as a whole and do not require overly fine division and independent control. In this case, the two adjacent detection sub-areas are merged into a new detection area to facilitate subsequent unified calculation and processing and simplify the control process.

[0062] In some embodiments of the present invention, a correspondence database between the scraper 2 and the cleaning position of the conveyor belt surface is pre-established, and the database stores the cleaning position coordinate range 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 correspondence database to determine the target scraper 2 responsible for cleaning the adhesion density area; the color depth value of the adhesion in the adhesion density area is obtained, and the difference is calculated with the pre-calculated grayscale value average value, and the extrusion force value that the scraper 2 needs to apply to the conveyor belt surface is calculated based on the difference, and the scraper 2 is driven by the extrusion component to process the conveyor belt surface according to the calculated extrusion force.

[0063] The extrusion assembly includes an electromagnet 19 , a permanent magnet block 18 is provided above the electromagnet 19 , a pressure sensor 24 is installed on the upper end of the permanent magnet block 18 , and the scraper 2 is installed on the upper end of the pressure sensor 24 .

[0064] By adopting the above technical solution, the specific calculation method can be operated as follows: the maximum extrusion force that the scraper 2 can apply to the conveyor belt is determined in advance, and this extrusion force is applied while ensuring the stable transmission of the conveyor belt. Then, the color depth value of the adhesion is determined. Because the darker the color of the adhesion, the more adhesion is accumulated there and the higher the density, that is, the higher the density of the adhesion detected, the more difficult it is to clean than the low-density adhesion. The maximum difference between the color depth value of the adhesion and the pre-calculated grayscale value average value is determined to obtain the maximum extrusion force value and the maximum difference. The maximum extrusion force value and the maximum difference are then divided by the maximum difference to obtain an extrusion force control coefficient. Then, each time the difference is detected, the obtained difference is multiplied by the extrusion force control coefficient to obtain the extrusion force that the scraper 2 needs to apply to the conveyor belt. The calculation of the extrusion force control coefficient provided above is relatively simple, and a more appropriate extrusion force control coefficient can be determined according to the different materials of the conveyed material, the viscosity of the material, the material of the conveyor belt, etc.

[0065] When the extrusion force of the scraper 2 on the conveyor belt needs to be adjusted, the electromagnet 19 corresponding to the target scraper 2 is energized. When the electromagnet 19 is energized, it will generate magnetism. Because the initial state of the electromagnet 19 and the permanent magnet block 18 is in contact, when the electromagnet 19 is energized, the adjacent surfaces of the electromagnet 19 and the permanent magnet block 18 are the same magnetic poles. The magnetic repulsion of the electromagnet 19 will push the permanent magnet block 18 upward, and the permanent magnet block 18 will squeeze the pressure sensor 24. At the same time, the pressure sensor 24 squeezes 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 has reached the calculated extrusion force, when the pressure sensor 24 detects that the pressure value reaches the preset extrusion force, the current flowing into the electromagnet 19 is stopped. This dynamic adjustment method of the scraper 2 can adapt to the changes of different adhesions, making the cleaning process more flexible and efficient, reducing the risk of inadequate cleaning due to inappropriate extrusion force or equipment failure due to excessive extrusion force, and improving the stability and reliability of the entire cleaning system.

[0066] In some embodiments of the present invention, the moving component includes a limit frame 22, multiple groups of scrapers 2 are arranged in the limit frame 22, and multiple groups of movable holes 23 are opened on the left and right side walls of the limit frame 22. A limit column 21 is set in the movable hole 23, and one end of the limit column 21 is fixedly connected to the scraper 2. The front and rear ends of the limit frame 22 are fixedly connected with connecting rods 27, one group of connecting rods 27 is fixedly connected with a spring 28 at one end away from the limit frame 22, and the other group of connecting rods 27 is in contact with the end away from the limit frame 22 and is provided with a cam 25. The lower end of the cam 25 is installed with a motor 26. The front and rear ends of the limit frame 22 are also provided with a support frame 29. The spring 28 is set in the corresponding support frame 29 and fixedly connected to the inner wall of the support frame 29. The motor 26 is installed in the corresponding support frame 29.

[0067] Because the present invention is provided with multiple groups of scrapers 2, there is a certain gap between the scrapers 2 and the scrapers 2. If there are impurities in the part of the conveyor belt corresponding to the gap, the scrapers 2 cannot be cleaned. The present invention drives the cam 25 to rotate through the motor 26. The cam 25 will squeeze the corresponding connecting rod 27 when rotating. The connecting rod 27 pushes the limit frame 22 and squeezes the spring 28. In the process of the cam 25 rotating and squeezing the connecting rod 27, the spring 28 is continuously compressed and reset, so that the limit frame 22 can be moved left and right. When the limit frame 22 moves left and right, the limit frame 22 drives the limit column 21 through the aperture of the movable hole 23, and drives the scraper 2 through the limit column 21, so that the scraper 2 can be moved left and right. In this way, the problem of inadequate cleaning caused by the gap between the multiple groups of scrapers 2 can be avoided. In addition, when the scraper 2 contacts the adhesion, the continuous left and right movement of the scraper 2 also facilitates the scraper 2 to clean the adhesion, thereby improving the cleaning efficiency and cleaning effect.

[0068] In some embodiments of the present invention, a splash guard 30 is provided on the outside of the scraper assembly and the spray assembly. The lower end of the splash guard 30 is fixedly connected to a collector cover 31. The lower end of the collector cover 31 is fixedly connected to 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.

[0069] The lower ends of multiple groups of electromagnets 19 are fixedly connected to support plate 1 20, the lower ends of cameras 1 are fixedly connected to support plate 2 34, the lower ends of multiple groups of motors 1 4 are fixedly connected to support plate 3 36, and support plate 3 36 is installed at the position of the inner wall of the splash guard 30 corresponding to the cylinder 38. Multiple groups of concave grooves 37 are provided on support plate 36, and cylinder 38 is installed in the concave groove 37. The front and rear ends of support plate 1 20 and support plate 2 34 are fixedly connected to the inner wall of the splash guard 30, and a support column 35 is fixedly connected between the inner wall of the splash guard 30 and the water diversion box 13. The connecting rod 27 movably passes 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.

[0070] The water tank 16 is divided into two spaces by a filter screen 33, and the drain pipe 32 extends into one of the spaces. The water inlet of the water pump 15 is connected to the other space in the water tank 16. The water outlet of the water pump 15 is fixedly connected to the water pipe 14. A sewage pipe 17 is installed on the side wall of the water tank 16 where the drain pipe 32 is inserted.

[0071] By adopting the above technical solution, the water jetted by the spray assembly is blocked by the splash guard 30 when it splashes, effectively preventing water from splashing. The splashed water and mixed adherent matter will flow downward along the inner wall of the splash guard 30, eventually flowing into the confluence cover 31, and then discharged into the corresponding space in the water tank 16 through the drain pipe 32. Because the water tank 16 is divided into two spaces by the filter 33, the water in the space with the drain pipe 32 is turbid, while the water in the other space filtered by the filter 33 is clean. The water pump 15 pumps clean water into the spray assembly. When it is necessary to drain the turbid water, simply open the drain pipe 17.

[0072] 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 plate 30, such as installing a sponge roller so that it contacts the lower surface of the conveyor belt to remove water marks on the surface of the conveyor belt. Then, a fan can be installed at the right end of the sponge roller. The fan can blow air toward the lower surface of the conveyor belt to effectively dry it. Alternatively, an electric dead heat can be added to the fan to dry the lower surface of the conveyor belt with hot air, thereby increasing the drying speed.

[0073] The above are only preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A circulating cleaning device for a bulk material conveyor belt conveyor, comprising a camera (1) and a processing module, characterized in that: The camera (1) is installed below the conveyor belt, and the camera (1) is used to collect information data from the conveyor belt surface. The processing module is used for the information data collected by the camera (1). The processing module calculates the area ratio of the adhered matter on the conveyor belt surface and the density of the adhered matter based on the information data collected by the camera (1). A spray assembly and a scraper assembly are also provided on the right side of the camera (1), and the scraper assembly is located on the right side of the spray assembly. The scraper assembly comprises a scraper (2), the upper end of the scraper (2) contacts the lower surface of the conveyor belt, and the lower end of the scraper assembly is also equipped with an extrusion assembly, the extrusion assembly is used to adjust the extrusion force between the scraper (2) and the conveyor belt according to the density of the adhesive adhered to the surface of the conveyor belt, and the two sides of the scraper assembly are also equipped with moving assemblies, the moving assemblies are used to control the scraper (2) to move forward and backward; The jet port of the injection assembly is directed toward the portion where the scraper (2) contacts the conveyor belt. The injection assembly is used to control the speed of the jet port's forward and backward swinging according to the area ratio of the adhered matter on the conveyor belt surface. The injection assembly is also used to control the opening size of the jet port according to the density of the adhered matter. The image to be detected of the detection area is acquired by a camera (1), the image is divided into pixel-level units, and a mapping relationship between pixels and actual physical areas is established; the pixel points of the adhesion are identified by comparing the difference between the image to be detected and the standard reference image; the number of the adhesion pixel points is counted, and the actual area of the adhesion is calculated by combining the physical area of each pixel, and the area ratio is calculated by dividing the adhesion area by the total area of the detection area; Query the database, match the interval corresponding to the area ratio, retrieve the swing speed parameter, and control the injection assembly to swing according to the matched speed parameter.

2. A circulating cleaning device for a bulk material conveyor belt conveyor according to claim 1, characterized in that: A standard reference image is captured in advance, where the conveyor belt and the conveyed material have different color characteristics. The image to be inspected and the standard reference image are segmented into pixel-level units, and a correspondence between pixels and actual physical areas is established. Through image comparison and analysis, pixels in the image to be inspected that differ from the standard reference image are identified as adhesion pixels. The number of identified adhesion pixels is counted, and the actual area of the adhesion in the image is calculated based on the actual physical area corresponding to each pixel. The calculated adhesion area is divided by the total area of the inspection area to obtain the area percentage of the adhesion within the inspection area. A correspondence database between area ratio and jet assembly swing speed is established in advance, and a plurality of area ratio intervals and their corresponding jet assembly swing speed parameters are stored in the correspondence database. After obtaining the area ratio of the adhesion in the detection area, the area ratio is matched with the area ratio interval in the correspondence database, and based on the matching result, the jet assembly swing speed parameter corresponding to the area ratio is retrieved from the correspondence database to control the jet assembly to swing according to the retrieved swing speed parameter.

3. The circulating cleaning device for a bulk material conveyor belt conveyor according to claim 2, characterized in that: Obtaining RGB color values of identified adhesion pixels and converting the RGB color values into grayscale values using a preset color conversion algorithm; calculating an average grayscale value of all adhesion pixels based on the converted grayscale values, and using the average value as a quantified value of the adhesion color depth; Presetting a concentration threshold and a color depth threshold, for a sub-region to be detected, calculating the concentration of adhesion pixels within the sub-region, and simultaneously obtaining a color depth quantization value of the adhesion pixels within the sub-region. When the concentration of adhesion pixels within the sub-region is greater than the concentration threshold, and the color depth quantization value of the adhesion pixels within the sub-region is greater than the color depth threshold, it is determined that the adhesion density within the sub-region is high; When an area with high density of adhesion is detected, the following control strategy is implemented: Control the spray assembly to pause its swinging motion, align the spray port with the area with the highest density of detected adhesions, and simultaneously perform a spray port diameter reduction operation; If there are multiple areas with the same density of adhesion and all of them are high density within the detection area, the nozzle is preferably aimed at the area with high density of adhesion closest to the scraper (2), and the injection time parameters are pre-set. After the injection treatment of the area is completed, the nozzle is controlled to adjust to the next target area; If there are multiple areas with the same density of adhesion matter and all of them are high density within the detection area, and the distances between each area and the scraper (2) are the same, the injection port is preferably aligned with the area with high adhesion matter density closest to the injection port for processing.

4. The circulating cleaning device for a bulk material conveyor belt conveyor according to claim 3, characterized in that: A database of correspondences between scrapers (2) and cleaning positions on the conveyor belt surface is pre-established, wherein the database stores a cleaning position coordinate range corresponding to each set of scrapers (2), and a matching query is performed in the correspondence database based on the coordinate position of the adhesion density area obtained by the adhesion detection system to determine the target scraper (2) responsible for cleaning the adhesion density area; The color depth value of the adhesion in the adhesion density area is obtained, and the difference calculation is performed with the pre-calculated average value of the 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 scraper (2) is driven by the extrusion component to process the conveyor belt surface according to the calculated extrusion force.

5. The circulating cleaning device for a bulk material conveyor belt conveyor according to claim 4, characterized in that: A reference image of the conveyor belt detection area in a clean state is collected in advance, the reference image is divided into a number of reference areas, the actual detection area below the camera (1) is divided into a number of detection sub-areas corresponding to the number, shape, and position of the reference areas, and the number of detection sub-areas is ensured to be consistent with 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 pre-set. If no adhesion is detected in a detection sub-region within the detection time threshold, the adjacent detection sub-region with a larger adhesion area is re-divided into two sub-regions. The control areas of the ejection components are reconfigured so that the ejection components corresponding to the adjacent detection sub-region with a larger adhesion area and the ejection components corresponding to the detection sub-region where no adhesion is detected control the two re-divided sub-regions respectively. If no adhesion is detected in two adjacent detection sub-areas within the detection time threshold, the two adjacent detection sub-areas are merged into a new detection area.

6. The circulating cleaning device for a bulk material conveyor belt conveyor according to claim 5, characterized in that: The spray assembly comprises a nozzle tube (3), a motor 1 (4) is mounted on the lower end of the nozzle tube (3), a sliding block (39) is mounted on the lower end of the motor 1 (4), a cylinder (38) is fixedly connected to the lower end of the sliding block (39), the motor 1 (4) is used to drive the nozzle tube (3) to swing, and a hose (12) is fixedly connected to the left end of the nozzle tube (3); The right end of the nozzle tube (3) is fixedly connected to a soft leather tube (8), the right end of the soft leather tube (8) is fixedly connected to a nozzle tube, the side wall and the lower end wall of the nozzle tube are magnetic conductive plates (10), and soft leather strips (11) are fixedly connected between multiple groups of the magnetic conductive plates (10). The upper end wall of the nozzle tube is a soft leather sheet (9). The outside of the nozzle tube (3) is provided with a coil (7), and the inside of the nozzle tube (3) is provided with an iron core (5), and a connecting column (6) is fixedly connected between the iron core (5) and the inner wall of the nozzle tube (3).

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

8. The circulating cleaning device for a bulk material conveyor belt conveyor according to claim 7, characterized in that: The moving assembly includes a limit frame (22), multiple groups of scrapers (2) are sleeved in the limit frame (22), multiple groups of movable holes (23) are opened on the left and right side walls of the limit frame (22), and a limit column (21) is set in the movable hole (23), one end of the limit column (21) is fixedly connected to the scraper (2), and the front and rear ends of the limit frame (22) are fixedly connected with connecting rods (27), one end of the connecting rod (27) away from the limit frame (22) is fixedly connected with a spring (28), and the other end of the connecting rod (27) away from the limit frame (22) is contacted with a cam (25), and the lower end of the cam (25) is installed with a second motor (26), and the front and rear ends of the limit frame (22) are also provided with a support frame (29), the spring (28) is set in the corresponding support frame (29) and fixedly connected to the inner wall of the support frame (29), and the second motor (26) is installed in the corresponding support frame (29).

9. The circulating cleaning device for a bulk material conveyor belt conveyor according to claim 8, characterized in that: A splash plate (30) is provided outside the scraper assembly and the spray assembly, the lower end of the splash plate (30) is fixedly connected to a collector cover (31), the lower end of the collector cover (31) is fixedly connected to a drain pipe (32), the lower end of the drain pipe (32) is provided with a water tank (16), and the lower end of the drain pipe (32) extends into the water tank (16); The lower ends of the multiple groups of electromagnets (19) are fixedly connected to support plate 1 (20), the lower end of the camera (1) is fixedly connected to support plate 2 (34), the inner wall of the splash plate (30) is installed with support plate 3 (36) at a position corresponding to the cylinder (38), the support plate 3 (36) is provided with multiple groups of concave grooves (37), the cylinder (38) is installed in the concave grooves (37), the front and rear ends of support plate 1 (20) and support plate 2 (34) are fixedly connected to the inner wall of the splash plate (30), a support column (35) is fixedly connected between the inner wall of the splash plate (30) and the water diversion box (13), the connecting rod (27) movably penetrates the side wall of the splash plate (30), and the support frame (29) is fixedly connected to the outer wall of the splash plate (30).

10. The circulating cleaning device for a bulk material conveyor belt conveyor according to claim 9, characterized in that: A water pump (15) is installed outside the water tank (16), and 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) 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). The upper end of the water guide pipe (14) is connected to the water diversion box (13). A sewage pipe (17) is installed on the side wall of the space of the water tank (16) where the drain pipe (32) is inserted.

Images