Belt return face cleaning dust removal device

Abstract

The utility model relates to belt cleaning technical field especially a kind of belt return face cleaning dust removal device, including the multistage cleaning component being arranged along the inclination direction of belt conveyor, each stage the cleaning component includes water supply pipeline, the partition pipe being set in water supply pipeline, the partition pipe will the water supply pipeline be divided into inside water supply passageway and outside return water passageway, and the inclined injection port being set in the partition pipe outside wall;Each stage the cleaning component is equipped with a return water component, and the return water component includes protective cover, the bottom of the protective cover is provided with return water port, the return water port is connected the return water passageway by return water pipe, and the intercepting screen is set on the return water port.In the intercepting screen top is provided with the rotating drum structure with L-shaped filter screen type scraper, driven by jetting water flow impact to rotate, automatically scrape the impurities retained on the intercepting screen, and by sewage cavity and sewage branch pipe are discharged into sewage main pipe centralized processing, effectively reduce the artificial cleaning frequency.

Description

Technical Field

[0001] This utility model relates to the field of belt cleaning technology, and in particular to a belt return surface cleaning and dust removal device. Background Technology

[0002] In coal mine transportation systems, belt conveyors are widely used as continuous transport equipment. To ensure equipment operating efficiency and a clean working environment, existing technologies typically employ spray cleaning or mechanical sweeping to remove coal dust, debris, and other contaminants adhering to the return surface of the belt. Common spray cleaning devices include nozzles positioned above the return section, which use water pressure to flush away contaminants, with protective covers preventing water mist diffusion; some systems also incorporate air supply via pipes to enhance atomization and improve cleaning efficiency. Additionally, some designs incorporate scraper-type cleaners installed in front of the tail pulley to remove large debris and residual carbon blocks, preventing them from entering critical parts of the equipment and causing wear or blockage.

[0003] However, existing cleaning and dust removal devices still have many shortcomings. First, traditional spray cleaning methods are mostly single-rinse structures, lacking the ability to grade and treat pollutants in different areas of the return surface, resulting in incomplete cleaning and easy waste of water resources. Second, spray devices often suffer from poor cleaning effects due to insufficient water pressure or unreasonable spray angles, and may even cause wastewater to splash back and contaminate electrical components. Furthermore, most systems are not equipped with effective wastewater recycling mechanisms, causing secondary environmental pollution and increasing the burden on wastewater treatment. In addition, existing devices often lack automated control methods, making it difficult to achieve intelligent start-stop functions linked to belt start and stop, affecting ease of use and energy efficiency. Therefore, there is an urgent need to provide a belt return surface cleaning and dust removal device with a reasonable structure, high cleaning efficiency, energy saving and environmental protection, and automatic control functions to solve the above problems. Summary of the Invention

[0004] Therefore, the technical problem to be solved by this utility model is that: traditional spray cleaning methods are mostly single rinsing structures, which lack the ability to grade and treat pollutants in different areas of the return surface, resulting in incomplete cleaning and easy waste of water resources; secondly, spray devices often have poor cleaning effect due to insufficient water pressure or unreasonable spray angle, and even sewage splashing back and contaminating electrical components.

[0005] The above-mentioned technical problems are solved by the following technical solution: This utility model proposes a belt return surface cleaning and dust removal device, including multi-stage cleaning components arranged along the inclined direction of the belt conveyor. Each cleaning component includes a water supply pipe, a partition pipe installed in the water supply pipe, an inner water supply channel and an outer water return channel formed by separating the water supply pipe through the partition pipe, and an inclined spray nozzle installed on the outer wall of the partition pipe.

[0006] Each cleaning component is equipped with a water return component, which includes a protective cover. The bottom of the protective cover is provided with a water return port. The water return port is connected to the water return channel through a water return pipe. An interception net is provided on the water return port.

[0007] Each of the aforementioned return water components corresponds to a debris discharge component. The debris discharge component includes a rotating drum disposed above the interception net, multiple scrapers disposed on the outer wall of the rotating drum, at least some of the scrapers being located on the water flow path of the spray nozzle, and a sewage branch pipe installed on the side of the protective cover. The multiple sewage branch pipes are connected to the main sewage pipe.

[0008] In a preferred embodiment of the belt return surface cleaning and dust removal device of this utility model: the water supply pipe is located below the belt conveyor, wherein the multi-stage cleaning components are respectively located in three parallel horizontal sections, all spanning the lower surface of the belt conveyor. Specifically, the water supply pipe below the belt conveyor is designed in a right-angled "S" shape, wherein the multi-stage cleaning components are respectively located at the three horizontal points of the right-angled "S" shape, all spanning the lower surface of the belt conveyor.

[0009] In a preferred embodiment of the belt return surface cleaning and dust removal device of this utility model: the belt conveyor is designed with one end high and the other end low, and the spray nozzle is long and inclined downward, spraying from top to bottom along the belt return surface.

[0010] In a preferred embodiment of the belt return surface cleaning and dust removal device of this utility model: an arc-shaped bottom is provided inside the protective cover, and the return water inlet is located at the lowest point of the arc-shaped bottom. The return water inlet is funnel-shaped, with an elongated inlet and a circular outlet connected to the return water pipe.

[0011] In a preferred embodiment of the belt return surface cleaning and dust removal device of this utility model: the partition pipe has symmetrical flared mouths at both ends, and the outer wall of the flared mouth is in contact with the inner wall of the water supply pipe, forming a return water channel between the water supply pipe and the partition pipe. A one-way valve is provided on the partition pipe for the water in the return water channel to flow into the water supply channel.

[0012] In a preferred embodiment of the belt return surface cleaning and dust removal device of this utility model: the two ends of the rotating drum are mounted on the inner wall of the protective cover through bearings, and a plurality of scrapers are arranged in a ring at equal intervals on the outer wall of the rotating drum.

[0013] In a preferred embodiment of the belt return surface cleaning and dust removal device of this utility model: a sewage discharge chamber is provided on the side of the protective cover. The sewage discharge chamber is shaped like a bucket, with the side communicating with the protective cover being elongated and the side communicating with the sewage discharge branch pipe being circular.

[0014] In a preferred embodiment of the belt return surface cleaning and dust removal device of this utility model: the scraper is L-shaped, with the long end fixed to the outer wall of the rotating drum, and the inlet at the short end is inclined, and the whole is a filter mesh design.

[0015] In a preferred embodiment of the belt return surface cleaning and dust removal device of this utility model: the lower surface of the scraper located below is in contact with the arc-shaped bottom, and the length of the arc-shaped bottom spans at least two adjacent scrapers.

[0016] In a preferred embodiment of the belt return surface cleaning and dust removal device of this utility model: one end of the water supply pipe is closed, and the other end is connected to a high-pressure water pump, which is placed in a water tank.

[0017] The beneficial effects of this utility model are as follows: The belt return surface cleaning and dust removal device provided in this application addresses the problems of incomplete cleaning, serious water waste, difficulty in wastewater recycling, low automation, and high maintenance frequency existing in the prior art. This device arranges multiple cleaning components along the inclined direction of the belt conveyor, and sets up water supply and return channels separated by partitions at each cleaning location, achieving graded rinsing of pollutants at different heights on the belt return surface, significantly improving cleaning coverage and efficiency. The long, inclined spray nozzle design ensures that the spray direction follows the downward movement trend of the belt return surface, enhancing the flushing force of water flow on pollutants such as coal dust and debris, while avoiding secondary pollution caused by water splashing. The water supply pipeline has a right-angled "S" shaped layout, reasonably adapting to the inclined belt structure, allowing each level of cleaning component to accurately cover the target area, improving space utilization and functional integration.

[0018] In terms of wastewater treatment and recycling, the device is equipped with a protective cover with an arc-shaped bottom and a funnel-shaped return water inlet, ensuring that wastewater can be smoothly collected and pre-filtered through an interception net before entering the return water channel. The filtered water is then returned to the water supply channel via a one-way valve on the baffle pipe to participate in the next round of flushing, achieving efficient recycling of water resources and reducing water consumption and wastewater treatment burden. At the same time, a rotating drum structure with an L-shaped filter scraper is installed above the interception net. The rotating drum is driven by the impact of the jet water flow, automatically scraping off the impurities trapped on the interception net and discharging them into the main sewage pipe for centralized treatment through the sewage discharge chamber and sewage branch pipe. This effectively reduces the frequency of manual cleaning and improves the automation level and operational stability of the system. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments of this utility model will be briefly described below. Obviously, the drawings described below only relate to some embodiments of this utility model and are not intended to limit the scope of this utility model. Wherein:

[0020] Figure 1 An external view of the belt return surface cleaning and dust removal device is shown;

[0021] Figure 2 A cross-sectional view of the belt return surface cleaning and dust removal device is shown;

[0022] Figure 3 The internal cross-sectional structure of the protective shield is shown;

[0023] Figure 4 A cross-sectional view of the diaphragm inside the water supply pipeline is shown;

[0024] Figure 5 The installation of the belt return face cleaning and dust removal device is shown. Figure 1 ;

[0025] Figure 6 The installation of the belt return face cleaning and dust removal device is shown. Figure 2 .

[0026] In the picture:

[0027] 100. Cleaning component; 101. Water supply pipe; 102. Divider pipe; 102a. Flare; 102b. Check valve; 103. Water supply channel; 104. Return water channel; 105. Spray nozzle; 200. Return water component; 201. Protective cover; 202. Return water inlet; 203. Return water pipe; 205. Interception net; 206. Arc-shaped bottom; 300. Waste removal component; 301. Rotary drum; 302. Scraper; 303. Sewage branch pipe; 304. Sewage main pipe; 305. Sewage chamber. Detailed Implementation

[0028] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0029] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0030] Reference Figures 1-6This embodiment provides a belt return surface cleaning and dust removal device, including multi-stage cleaning components 100 arranged along the inclined direction of the belt conveyor. Each cleaning component 100 includes a water supply pipe 101, a baffle 102 disposed within the water supply pipe 101, the baffle 102 dividing the water supply pipe 101 into an inner water supply channel 103 and an outer water return channel 104, and an inclined spray nozzle 105 disposed on the outer wall of the baffle 102; each cleaning component 100 is equipped with a water return component 200, the water return component 200 including a protective cover 201, the protective cover 201... A return water inlet 202 is provided at the bottom of 01. The return water inlet 202 is connected to the return water channel 104 through the return water pipe 203. An interception net 205 is provided on the return water inlet 202. Each return water component 200 corresponds to a waste discharge component 300. The waste discharge component 300 includes a rotating drum 301 provided above the interception net 205. Multiple scrapers 302 are provided on the outer wall of the rotating drum 301. At least some of the scrapers 302 are located on the water flow path of the spray nozzle 105. A sewage branch pipe 303 is installed on the side of the protective cover 201. Multiple sewage branch pipes 303 are connected to the sewage main pipe 304.

[0031] In this embodiment, each stage of the multi-stage cleaning component 100 includes: a water supply pipe 101 serving as the main water supply channel 103 of the entire system, installed below the belt conveyor and arranged along its inclined direction. A partition pipe 102 is disposed inside the water supply pipe 101, dividing the water supply pipe 101 into two independent areas: the inner water supply channel 103 is used to supply water to the upper spray nozzle 105; the outer return water channel 104 is used to collect the wastewater after cleaning and recycle it to the next stage of treatment. The inclined spray nozzle 105 is located on the outer wall of the partition pipe 102, arranged at an inclined angle to ensure that the sprayed water flow can effectively flush away contaminants on the return surface of the belt and move the dirt downward with the water flow, avoiding secondary contamination of the spray nozzle 105 or the belt surface. The presence of the partition pipe 102 results in a narrower pipe diameter, faster water flow velocity, and increased pressure, thereby enhancing the spraying effect. Due to the narrowed diameter, less liquid can be used, leaving water for the subsequent cleaning components 100; at the same time, the inclined spray angle matches the inclined direction of the belt, further improving the cleaning efficiency.

[0032] Each cleaning component 100 is equipped with a return water component 200, including a protective cover 201 that covers the cleaning area to prevent water spray during high-pressure washing and protect the safety of surrounding equipment and personnel. The return water inlet 202 is located at the lowest point of the protective cover 201 for easy collection and discharge of wastewater. An interceptor net 205 is installed at the return water inlet 202 to pre-filter large particles in the wastewater, preventing blockage of subsequent pipes. The return water pipe 203 connects the return water inlet 202 to the outer return water channel 104 of the water supply pipe 101, enabling wastewater recycling and reuse. Wastewater collected by the protective cover 201 is coarsely filtered by the interceptor net 205 and then enters the return water channel 104. Some of the water can be reused in the washing process, forming a water resource recycling system that is energy-saving and environmentally friendly.

[0033] Each return water component 200 corresponds to a debris removal component 300, used to remove debris from the interceptor screen 205. This mainly includes a rotating drum 301 positioned above the interceptor screen 205 and capable of rotation. Scrapers 302 are installed on the outer wall of the rotating drum 301, forming an L-shaped filter structure. Part of the scrapers 302 are positioned within the water flow path of the spray nozzle 105, and are driven to rotate by the water flow. Sewage branch pipes 303 are installed on the side of the protective cover 201 to discharge the impurities scraped by the scrapers 302. The main sewage pipe 304, along with multiple sewage branch pipes 303, converges here, discharging the impurities to the sewage treatment system or a collection tank. When the sprayed water impacts the scrapers 302, it pushes the rotating drum 301 to rotate, causing the scrapers 302 to rotate accordingly, continuously scraping away the impurities trapped on the interceptor screen 205. When the scrapers reach a low position, they are poured into the sewage discharge chamber 305 and finally discharged through the sewage branch pipes 303, achieving an automatic cleaning function.

[0034] During operation, the device automatically activates a high-pressure water pump via the control box based on the start / stop signal of the belt conveyor. This pump pressurizes the water in the pool and sends it into the water supply pipe 101. The water flows through the narrowing pipe 102, where it is further pressurized, and is then sprayed at a certain angle from the inclined nozzles 105. This sprays directionally to flush away coal dust, debris, and other contaminants adhering to the return surface of the belt, causing them to move downwards with the water flow and fall into the protective cover 201. The bottom of the protective cover 201 has a return water inlet 202, where wastewater is collected and pre-filtered by an interceptor net 205 to remove large particles before entering the outer return water channel 104. The filtered water can be reintegrated into the water supply channel 103 inside the baffle 102 to continue participating in the subsequent flushing process, thus forming a water resource recycling process. At the same time, the rotating drum 301 installed above the intercepting net 205 drives the L-shaped scraper 302 on the outer wall to rotate under the impact of the jetting water flow. Some of the scrapers 302 are located in the jetting path and are continuously rotated by the water flow, thereby continuously scraping off the impurities trapped on the intercepting net 205. When the scraper 302 rotates to the side drain chamber 305, it is poured out and finally collected into the main drain pipe 304 through the connected drain branch pipe 303 for unified discharge and treatment, realizing the automatic impurity discharge function.

[0035] The entire system can be further equipped with an intelligent control module. The control box is electrically connected to the solenoid valve, enabling automatic start and stop of the cleaning device based on the belt's operating status, improving operational convenience and energy efficiency. This cleaning and dust removal device, through innovative designs such as multi-stage spray cleaning, wastewater recycling, automatic cleaning and impurity removal, and intelligent linkage control, effectively solves the problems of incomplete cleaning, serious water waste, significant environmental pollution, and high maintenance frequency inherent in traditional cleaning methods. It boasts significant advantages such as reasonable structure, safety and reliability, energy saving and environmental protection, and a high degree of automation, making it a promising candidate for application and widespread use in coal mines and other continuous transportation systems.

[0036] Reference Figure 1 The water supply pipe 101 is designed in a right-angle "S" shape below the belt conveyor, and the multi-stage cleaning components 100 are located at the three horizontal points of the right-angle "S" shape, all spanning the lower surface of the belt conveyor.

[0037] It should be noted that the water supply pipeline 101 is arranged in a right-angled "S" shape below the belt conveyor. Its structure consists of multiple alternating horizontal and vertical sections, presenting a multi-fold, three-dimensional layout. This design not only adapts to the structural characteristics of the inclined belt conveyor but also allows for a rational arrangement of the water supply lines within limited installation space. This enables each cleaning component 100 to accurately correspond to and cover different height areas on the belt return surface, thereby improving the comprehensiveness and effectiveness of the cleaning operation. Simultaneously, this "right-angled S" shape facilitates the water flow along a predetermined path, ensuring stable water pressure and flow at each cleaning location. This further enhances the system's operational stability and improves the overall structural compactness and aesthetic appearance of the device, providing convenience for subsequent maintenance and operation.

[0038] Based on the right-angled "S"-shaped arrangement of the water supply pipe 101, multi-stage cleaning components 100 are respectively installed on the three transverse sections of the structure. Each stage spans the lower surface of the belt conveyor and is arranged sequentially along the belt running direction (from low to high), respectively, to perform step-by-step flushing of pollutants in different height areas on the return surface. This layout not only achieves segmented and full-coverage cleaning of the belt return surface, effectively improving the overall cleaning coverage and efficiency, but also allows the flushed wastewater to flow naturally to lower areas by gravity, facilitating centralized collection and subsequent treatment. In addition, each level of cleaning component 100 can accurately act on the target area with the optimal spray angle and distance, significantly enhancing the flushing effect, and providing a good spatial matching basis for the integrated design of the protective cover 201, interception net 205, return water channel 104, and sewage system, which is conducive to the functional optimization and systematic operation of the entire cleaning and dust removal device.

[0039] Reference Figure 5 or Figure 6 The belt conveyor is designed with one end higher than the other. The spray nozzle 105 is long and inclined downwards, spraying from top to bottom along the return surface of the belt.

[0040] It should be noted that the belt conveyor adopts an inclined arrangement with one end higher than the other to transport materials from a lower to a higher position, with its return surface also inclined downwards. To adapt to this structural feature and improve cleaning efficiency, the spray nozzles 105 in the device are designed as elongated strips and installed at an inclined downwards, allowing the water flow width to cover the width of the belt. Simultaneously, the water flow direction is consistent with the movement trend of the belt's return surface, thus achieving top-down forward spray cleaning. This design not only effectively expands the rinsing coverage area and avoids cleaning blind spots, but also enhances the flushing force of the water flow on contaminants such as coal dust and debris through gravity, promoting smooth flow of wastewater down the belt surface and preventing water droplets from splashing back and contaminating cleaned areas. Furthermore, forward spraying reduces water mist splashing caused by water flow impact, minimizing the impact on surrounding equipment and the environment. Combined with the sequential distribution of multi-stage cleaning components 100 along the belt height, this further ensures that each stage of spraying accurately targets its corresponding area, significantly improving overall cleaning efficiency and system operational stability.

[0041] Reference Figure 3 An arc-shaped bottom 206 is provided inside the protective cover 201, and the return water outlet 202 is located at the lowest point of the arc-shaped bottom 206. The return water outlet 202 is funnel-shaped, with an elongated inlet and a circular outlet connected to the return water pipe 203.

[0042] It should be noted that the internal structure design of the protective cover 201 features a specially designed arc-shaped bottom 206. This arc-shaped bottom 206 not only effectively guides the flow direction of wastewater generated during the rinsing process, reducing splashing and resistance caused by water flow impact, but also has good flow guiding performance, allowing the liquid to smoothly converge to the lowest point at the bottom. The return water inlet 202 is located at the lowest point of this arc-shaped bottom 206, adopting a funnel-shaped structure design. Its inlet is elongated, covering a large area laterally, which is conducive to the extensive collection of rinsing wastewater from different positions on the belt return surface, improving drainage efficiency. The outlet of the return water inlet 202 is circular and connects to the external return water pipe 203, facilitating docking with standard piping systems, ensuring a smooth water flow transition, and reducing the risk of blockage. The overall structure, combined with the arc-shaped bottom 206, the funnel-shaped return water inlet 202, and the rational configuration of the elongated inlet and circular outlet, not only improves the uniformity of wastewater collection and the stability of system operation, but also helps to prevent water accumulation, reduce secondary pollution, and enhance the practicality and environmental performance of the device in actual applications.

[0043] Reference Figure 4The baffle 102 has symmetrical bell mouths 102a at both ends, and the outer wall of the bell mouth 102a is in contact with the inner wall of the water supply pipe 101, forming a return water channel 104 between the water supply pipe 101 and the baffle 102. A one-way valve 102b is provided on the baffle 102 for the water in the return water channel 104 to flow into the water supply channel 103.

[0044] The two ends of the baffle 102 adopt a symmetrical bell-shaped structure 102a, and its outer wall is tightly fitted to the inner wall of the water supply pipe 101, forming an annular return water channel 104 between the water supply pipe 101 and the baffle 102. This channel is used to collect the wastewater that flows back after rinsing from the spray nozzle 105 and guide it into the subsequent recycling or discharge process. The baffle 102 is also equipped with a one-way valve 102b, which allows the water in the return water channel 104 to flow into the inner water supply channel 103 after preliminary filtration to participate in the next round of spray cleaning, without reverse flow, thereby realizing the recycling of water resources. This structure not only enhances the sealing and fit between the baffle 102 and the water supply pipe 101 through the expansion shape of the bell-shaped opening 102a, ensuring a clear boundary between the water supply channel 103 and the return water channel 104 to prevent short circuits, but also effectively maintains the internal pressure balance of the system with the help of the one-way valve 102b, improving the overall operational stability, water-saving performance and environmental protection effect.

[0045] Reference Figure 3 The rotating drum 301 is mounted on the inner wall of the protective cover 201 at both ends via bearings. Multiple scrapers 302 are arranged in a ring at equal intervals on the outer wall of the rotating drum 301. The scrapers 302 are L-shaped, with their long ends fixed to the outer wall of the rotating drum 301 and their short ends having an inclined inlet, forming an overall filter-like design. The lower scraper 302 has its lower surface in contact with the arc-shaped bottom 206, the length of which spans at least two adjacent scrapers 302.

[0046] It should be explained that the two ends of the rotating drum 301 are mounted on the inner wall of the protective cover 201 via bearings, allowing it to rotate freely under the impact of the flushing water flow. Multiple scrapers 302 are arranged in a ring and at equal intervals on the outer wall of the rotating drum 301, forming a uniformly distributed cleaning component 100. Each scraper 302 adopts an L-shaped structure design, with its long end fixed to the surface of the rotating drum 301 and its short end inlet set at an angle. The overall structure is constructed as a filter mesh, effectively intercepting impurities while allowing water to flow smoothly. During the rotation of the rotating drum 301, the lower scraper 302's lower surface contacts the protective cover 201. The arc-shaped bottom 206 inside the protective cover 201 fits tightly, and the arc-shaped bottom 206 spans the area between at least two adjacent scrapers 302 along its length, ensuring that no matter what rotation angle the rotating drum 301 is at, there is always a scraper 302 that can continuously scrape and clean the deposits on the arc-shaped bottom 206. This structure not only enables the scraper 302 to efficiently remove impurities from the interception net 205, but also prevents impurities from accumulating in the return water area through its design in conjunction with the arc-shaped bottom 206, ensuring smooth discharge of sewage and stable operation of the system, and improving the automated cleaning capability and environmental adaptability of the entire cleaning and dust removal device.

[0047] Reference Figure 3 The protective cover 201 has a sewage discharge chamber 305 on its side. The sewage discharge chamber 305 is funnel-shaped, with the side connected to the protective cover 201 being elongated and the side connected to the sewage branch pipe 303 being circular.

[0048] It should be noted that the protective cover 201 has a funnel-shaped sewage discharge chamber 305 on its side. This sewage discharge chamber 305 is used to collect impurities scraped off from the interceptor net 205, as well as sewage and coal slag and other pollutants that fall into the protective cover 201 during the rinsing process. The side connected to the protective cover 201 has a long strip opening design, which can cover a large area laterally, effectively increasing the flow area of ​​impurities entering the sewage discharge chamber 305, preventing local blockage, and enhancing sewage discharge efficiency. The side connected to the external sewage branch pipe 303 has a circular outlet, which facilitates docking with a standard circular pipe system, reduces water flow resistance, and ensures smooth discharge of sewage. Overall, the funnel-shaped sewage discharge chamber 305 has a structure that is wider at the top and narrower at the bottom, which is conducive to the concentrated flow of pollutants to the outlet under the action of gravity, avoiding stagnation and accumulation. At the same time, its combination design of long strip inlet and circular outlet takes into account the functions of efficient collection and stable discharge. It is an important structural configuration for realizing automated sewage discharge of the cleaning and dust removal device and ensuring the continuous and stable operation of the system.

[0049] One end of the water supply pipe 101 is closed, and the other end is connected to a high-pressure water pump, which is placed in a water tank. The closed design of one end of the water supply pipe 101 prevents water leakage or backflow, ensuring stable internal system pressure. The other end is connected to the high-pressure water pump, serving as the power input for the entire cleaning and dust removal device. The high-pressure water pump is placed directly in the water tank, drawing and pressurizing water from the tank to deliver high-pressure water to the water supply pipe 101, thus providing a continuous and stable high-pressure flushing water supply for each level of the cleaning components 100. This arrangement is not only simple in structure and easy to maintain, but also enables continuous system operation and provides a good foundation for subsequent wastewater recovery, filtration, and recycling, effectively improving the operating efficiency and energy-saving and environmental performance of the cleaning device.

[0050] Reference Figures 1-6 The workflow for this application is as follows:

[0051] One end of the water supply pipe 101 is connected to a high-pressure water pump, which is placed in a water tank to ensure a stable water supply to the pipe. Given the inclined layout of the belt conveyor, with one end higher than the other, and to accommodate the material transport from lower to higher elevations, the water supply pipe 101 is laid beneath the belt conveyor to ensure water can be transported from lower to higher elevations. The water supply pipe 101 passes sequentially through the first, second, and third cleaning and dust removal sections, arranged from low to high, cleverly positioned at the three horizontal points of a right-angled S-shape, allowing for multiple cross-sectional spray cleaning of the belt's return surface. The third cleaning and dust removal section at the higher elevation is cleaned first, while the first section is cleaned last.

[0052] At each cleaning and dust removal component, water from the water supply pipe 101 enters the partition pipe 102. Due to the narrowing design of the pipe diameter from the water supply pipe 101 to the partition pipe 102, the water pressure is increased. Part of the water continues to flow upward along the partition pipe 102 to supply water to the subsequent cleaning and dust removal parts; the other part of the water is sprayed out from the spray nozzle 105 connected to the partition pipe 102. Furthermore, the spray nozzle 105 is inclined, which, combined with the inclined layout of the belt, ensures that the sprayed water can accurately wash away the dirt on the belt return surface, and the dirt washed off is smoothly discharged with the downward movement of the belt, without dripping back into the spray nozzle 105. When cleaning the belt return surface, the water sprayed through the spray nozzle 105 forms a powerful water jet, washing away coal dust, debris, and other dirt on the belt return surface. The impact force of the water jet is sufficient to peel off the dirt adhering to the belt surface, thereby achieving the purpose of cleaning.

[0053] Considering that water can easily splash during rinsing, potentially causing adverse effects on the surrounding work environment, electrical components, and personnel, a protective cover 201 is installed at each cleaning and dust removal component. The protective cover 201 encloses the sprayed water, effectively protecting the surrounding work environment from water damage, providing a safety barrier for electrical components, and ensuring the personal safety of personnel.

[0054] The cleaned water accumulates inside the protective cover 201. A return water inlet 202 is located at the lowest point of the protective cover 201, equipped with a screen 205 to intercept larger dirt particles, thus performing preliminary filtration of the returned water. The filtered water flows through the return water pipe 203 into the chamber between the baffle 102 and the water supply pipe 101. A one-way valve 102b on the baffle 102 allows this water to flow back into the baffle 102 as a supplement, enabling it to participate in the rinsing process again or enter the next cleaning and dust removal area, thus achieving water resource recycling.

[0055] A rotating drum 301 is installed above the interception net 205. The outer wall of the drum 301 is equipped with L-shaped filter-type scrapers 302. Some of the scrapers 302 are located in the spray path of the spray nozzle 105. When water is sprayed from the spray nozzle 105, the impact force of the water flow drives the drum 301 to rotate. During rotation, the scrapers 302 below the drum 301 effectively scrape away the dirt intercepted on the interception net 205. As the drum 301 continues to rotate, when the scrapers 302 reach a flipped state, the dirt collected inside is poured into the drain chamber 305 on the side of the protective cover 201. The drain chamber 305 collects dirt from various sources, which is then discharged through the drain branch pipe 303 and finally discharged from the system through the main drain pipe 304, achieving centralized collection and transportation of dirt.

[0056] During the rinsing and cleaning process, some wastewater will fall directly into the drain chamber 305 and be discharged and recycled along with the dirt scraped off, thus preventing wastewater from being scattered and causing secondary pollution.

[0057] Through the above-mentioned carefully designed cleaning and dust removal system, dust pollution can be effectively controlled during the operation of coal mine belt conveyors, improving the quality of the working environment, reducing the harm to the occupational health of workers, and realizing the recycling of water resources, thereby improving the environmental protection and economy of the entire system.

[0058] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A belt return surface cleaning and dust removal device, characterized in that: The system includes a multi-stage cleaning component (100) arranged along the inclined direction of the belt conveyor. Each stage of the cleaning component (100) includes a water supply pipe (101), a partition pipe (102) disposed in the water supply pipe (101), an inner water supply channel (103) and an outer water return channel (104) formed by separating the water supply pipe (101) through the partition pipe (102), and an inclined spray nozzle (105) disposed on the outer wall of the partition pipe (102). Each cleaning component (100) is equipped with a water return component (200), which includes a protective cover (201). The bottom of the protective cover (201) is provided with a water return port (202). The water return port (202) is connected to the water return channel (104) through a water return pipe (203). An interception net (205) is provided on the water return port (202). Each of the return water components (200) corresponds to a waste removal component (300). The waste removal component (300) includes a rotating drum (301) arranged above the intercepting net (205), and multiple scrapers (302) arranged on the outer wall of the rotating drum (301). At least some of the scrapers (302) are located on the water flow path of the spray nozzle (105). A sewage branch pipe (303) is installed on the side of the protective cover (201), and multiple sewage branch pipes (303) are connected to the sewage main pipe (304).

2. The belt return surface cleaning and dust removal device according to claim 1, characterized in that: The water supply pipe (101) is located below the belt conveyor, wherein the multi-stage cleaning components (100) are located in three parallel horizontal sections, all spanning the lower surface of the belt conveyor.

3. The belt return surface cleaning and dust removal device according to claim 1 or 2, characterized in that: The belt conveyor is designed with one end higher than the other. The spray nozzle (105) is long and inclined downwards, spraying from top to bottom along the return surface of the belt.

4. The belt return surface cleaning and dust removal device according to claim 1, characterized in that: An arc-shaped bottom (206) is provided inside the protective cover (201), and the return water inlet (202) is located at the lowest point of the arc-shaped bottom (206). The return water inlet (202) is funnel-shaped, and the outlet is connected to the return water pipe (203) in a circular shape.

5. The belt return surface cleaning and dust removal device according to claim 1, characterized in that: The partition (102) has symmetrical bell mouths (102a) at both ends, and the outer wall of the bell mouth (102a) is in contact with the inner wall of the water supply pipe (101), forming a return water channel (104) between the water supply pipe (101) and the partition (102). A one-way valve (102b) is provided on the partition (102) for the water in the return water channel (104) to flow into the water supply channel (103).

6. The belt return surface cleaning and dust removal device according to claim 4, characterized in that: The rotating drum (301) is mounted on the inner wall of the protective cover (201) at both ends by bearings, and a plurality of scrapers (302) are arranged in a ring at equal intervals on the outer wall of the rotating drum (301).

7. The belt return surface cleaning and dust removal device according to claim 1, characterized in that: The protective cover (201) has a drain cavity (305) on its side. The drain cavity (305) is shaped like a bucket. The side that communicates with the protective cover (201) is elongated, and the side that communicates with the drain branch pipe (303) is circular.

8. The belt return surface cleaning and dust removal device according to claim 4 or 6, characterized in that: The scraper (302) is L-shaped, with its long end fixed to the outer wall of the rotating drum (301) and its short end inlet set at an inclination. The whole is designed as a filter screen.

9. The belt return surface cleaning and dust removal device according to claim 8, characterized in that: The lower surface of the scraper (302) located below is in contact with the arcuate bottom (206), the length of which spans at least two adjacent scrapers (302).

10. The belt return surface cleaning and dust removal device according to claim 1, characterized in that: One end of the water supply pipe (101) is closed, and the other end is connected to a high-pressure water pump, which is placed in a water tank.

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