A belt return face cleaning dustproof conveyor and a control method thereof

Abstract

The application provides a belt return surface cleaning dustproof conveyor and a control method thereof, and belongs to the technical field of conveyor belt cleaning. The conveyor comprises a rack, one end of the rack is provided with a transmission unit, the other end of the rack is provided with a tensioning roller assembly, the transmission unit and the tensioning roller assembly cooperate to drive the belt on the rack, a deviation rectifying device is arranged on the rack to rectify the belt, a spray cleaning assembly, a water sweeper assembly and a cleaning water tank assembly are arranged on the rack to clean the belt, the belt can be rectified, the nozzle is used to realize micro-mist dust reduction, the cleaning water tank assembly is configured to realize water resource recycling, the belt is self-cleaned through the belt cleaning device, and dust raising is prevented.

Description

Technical Field

[0001] This invention relates to the field of coal mine conveyor belt cleaning technology, and in particular to a conveyor belt return surface cleaning and dust prevention system and its control method. Background Technology

[0002] With the increasing energy consumption in China, the demand for coal is also rising year by year, placing higher demands on coal conveying systems. Belt conveyors are widely used in open-pit coal mines due to their high reliability, safety, and low cost. However, belt conveyors in open-pit coal mines generate a large amount of dust during coal transportation. Dust generation from belt misalignment and material spillage, as well as dust generation from vibration on the return surface, are significant causes of dust generation by belt conveyors, posing hazards to the working environment and the occupational health of workers.

[0003] Currently, the main method for controlling dust generation from belt conveyors is spray dust suppression. Water is sprayed onto the material through nozzles, causing the dust to settle onto the belt after mixing with the water. While spray dust suppression can capture most of the dust generated during belt transport, it still presents several problems under prolonged, high-load operation. For example, the reduced friction between the wetted belt and the rollers during operation makes the belt prone to misalignment, causing raw coal to spill and generate coal dust. After unloading raw coal, residual coal dust adheres to the return surface of the belt on the pressure roller assembly. This dust can spread under belt vibration, so it is crucial to effectively suppress belt vibration during the remaining stretch after unloading to reduce vibration-induced dust. Furthermore, open-pit coal mines in remote areas often lack water resources, necessitating the use of micro-mist nozzles and water recycling systems for efficient dust suppression.

[0004] This invention discloses a dust-control conveyor for the return face of a coal preparation plant and its control method. This system provides a solution to the challenges of dust generation due to vibration on the return face of belt conveyors in remote areas, dust generation due to belt slippage and material spillage, and difficulties in achieving efficient dust suppression due to limited water resources at the production site. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a belt return surface cleaning and dust prevention conveyor and its control method to solve the technical problems of vibration dust generation, belt slippage and material spillage dust generation in the return surface of coal mine belt conveyors, and the difficulty in achieving efficient dust reduction due to limited water resources.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0007] A belt return surface cleaning and dustproof conveyor includes a frame, a transmission unit is provided at one end of the frame, and a tension roller assembly is provided at the other end of the frame. The transmission unit and the tension roller assembly cooperate to drive the belt on the frame. A belt correction device is provided on the frame for correcting the belt deviation.

[0008] A belt washing device is provided below the frame. The belt washing device includes a spray cleaning assembly, a water sweeper assembly, and a cleaning water chute assembly. The spray cleaning assembly and the water sweeper assembly are located inside the cleaning water chute assembly.

[0009] The spray cleaning assembly includes n sets of spray assemblies, each set of spray assemblies has k rows of nozzles, and each row of nozzles has m nozzles. The formula for calculating the number m of nozzles in each row of the spray assembly is formula (1), and the formula for calculating the number n of the spray assemblies is formula (2).

[0010]

[0011]

[0012] Wherein, S is the effective spray area of ​​the nozzle of the spray assembly; a is the width of the belt; and b is the length of the belt.

[0013] The water cleaner assembly includes c sets of scrapers, each set of scrapers is provided with q rows of nozzles, and the number of nozzles in each row of the scrapers is d. The formula for calculating the number of nozzles d in each row of the scrapers is formula (3), and the formula for calculating the number of scrapers c is formula (4).

[0014]

[0015]

[0016] S1 is the effective spray area of ​​the nozzle on the scraper;

[0017] The nozzles of the spray cleaning assembly and the water sweeper assembly face the return surface of the belt.

[0018] The cleaning water chute assembly is connected to a sewage discharge, purification, and circulation device.

[0019] Preferably, the frame includes an intermediate frame, a drive unit frame, and a tensioning device tail frame, and the inner sides of both the drive unit frame and the tensioning device tail frame are provided with redirecting rollers;

[0020] The drive unit frame is provided at one end of the intermediate frame, and the drive unit frame is used to support the transmission unit.

[0021] The other end of the intermediate frame is provided with the tensioning device tail frame, which is used to support the tensioning roller assembly;

[0022] At least two sets of support legs are evenly arranged on the lower surface of the intermediate frame, and a roller frame is provided above each set of support legs. The roller frame is installed on the upper surface of the intermediate frame.

[0023] Each of the roller frames is provided with a roller that supports the bearing surface of the belt; a return roller is provided between each of the legs on the lower surface of the intermediate frame to support the return surface of the belt.

[0024] Preferably, the correction device includes a correction roller frame, a correction roller, and a vertical stop roller. A through hole is provided on the intermediate frame near the tail frame of the tensioning device. The correction roller frame is rotatably connected to the through hole. The vertical stop roller is located at both ends of the correction roller. The vertical stop roller can drive the correction roller frame to rotate when subjected to force.

[0025] Preferably, the transmission unit includes a reduction gear, a drive gear, and a drive roller, wherein the reduction gear is connected to and controls the drive roller, and the drive gear is connected to and drives the drive roller.

[0026] Preferably, the tensioning roller assembly includes a driven roller, and tensioning shaft seats are connected to both ends of the bearing of the driven roller. The tailstock of the tensioning device has grooves on both sides, and the tensioning shaft seats are slidably connected in the grooves. The tensioning shaft seats are connected to a pull rod, and the tensioning shaft seats can be controlled to slide on the grooves by pulling the pull rod. The belt is tensioned between the driving roller and the driven roller, and the belt drives the transmission between the driving roller and the driven roller.

[0027] Preferably, the cleaning water chute assembly is boat-shaped and installed below the intermediate frame. The spray cleaning assembly and the water sweeper assembly are electrically connected to the control box. The start and stop of the spray cleaning assembly and the water sweeper assembly are controlled by a solenoid valve. The control box is electrically connected to the solenoid valve and controls the solenoid valve. The switch of the transmission unit is electrically connected to the control box. The transmission unit starts and stops simultaneously with the spray cleaning assembly and the water sweeper assembly. Air pipes and water pipes are installed on both sides of the intermediate frame.

[0028] Preferably, at least one spray assembly is provided, and the spray assembly is installed in the boat-shaped groove of the cleaning water chute assembly; one end of the water pipe and the air pipe are both connected to the spray assembly; the other end of the water pipe is connected to a water tank, and a filter, a water pump, the solenoid valve, a water flow meter, and a booster pump are sequentially arranged on the pipeline connecting the water tank and the water pipe; the other end of the air pipe is connected to an air compressor, and the solenoid valve and an air flow meter are sequentially arranged on the pipeline connecting the air compressor and the air pipe; both the air compressor and the water pump are connected to a regulating valve, and both the air compressor and the water pump are controlled by the regulating valve; the nozzle of the spray assembly is located below the return surface of the belt and aligned with the return surface of the belt.

[0029] Preferably, the water sweeper assembly includes at least one set of water sweeper brackets. Each water sweeper bracket has a fixing rod on one side, and the fixing rods are threaded. The intermediate frame base has grooves on both sides, and adjusting nuts are installed in the grooves. The water sweeper brackets are suspended from the lower end of the intermediate frame base by the threaded engagement of the fixing rods with the adjusting nuts. The scraper is mounted on the water sweeper brackets and aligned with the return surface of the belt. The distance between the water sweeper brackets and the return surface of the belt can be controlled by adjusting the adjusting nuts.

[0030] The water cleaner bracket has a high-pressure water connector and a high-pressure gas connector at both ends, which are respectively connected to the water pipe and the gas pipe. The nozzle on the scraper is connected to the high-pressure water connector and the high-pressure gas connector. The nozzle of the scraper is located below the return surface of the belt and aligned with the return surface of the belt.

[0031] A control method for a belt return surface cleaning and dust prevention conveyor, utilizing the aforementioned belt return surface cleaning and dust prevention conveyor, is characterized by the following steps:

[0032] S1. Tension and flatten the belt;

[0033] S2. Determine the arrangement scheme of the nozzles of the spray cleaning assembly and the water cleaner assembly based on the calculation results of the number of nozzles m in each row of the spray assembly, the number of spray assemblies n, the number of nozzles d in each row of the scraper and the number of scrapers c.

[0034] S3. Drive the transmission unit to drive the belt to perform transmission motion, and the belt washing device wets both sides of the return surface of the belt;

[0035] S4. The correction device corrects the misaligned belt, and the scraper and the nozzle on the scraper clean the belt.

[0036] S5. Shut down the transmission unit and the belt washing device, and recover the wastewater in the cleaning water chute assembly.

[0037] Preferably, step S1, which involves tensioning and flattening the belt, includes:

[0038] Before starting the belt return surface cleaning and dustproof conveyor, pull the lever to adjust the position of the tensioning roller assembly, while manually adjusting the position of the redirecting roller and flattening the belt under the support of the return idler roller, so that the belt is in a stable tension state;

[0039] S3 includes: starting the transmission unit, the belt being driven by the driving drum and the driven drum, the nozzles of the spray cleaning assembly and the nozzles of the water cleaner assembly wetting both sides of the return surface of the belt, so that the solid pollutants on the belt are converted into mud flow form.

[0040] S5 includes: while shutting down the transmission unit, the switch of the transmission unit sends a signal to the control box; the control box controls the spray cleaning component and the water sweeper component to shut down synchronously with the transmission unit by controlling the solenoid valve; a sewage pipe is inserted into the boat-shaped groove of the cleaning water chute component to recycle sewage; the sewage pipe is connected to a purification and circulation device for sewage recycling.

[0041] Compared with the prior art, the present invention has at least the following beneficial effects:

[0042] In the above solution, to address the issue of belt misalignment that easily occurs during operation after the belt is wetted, a corrective roller is installed to adjust the belt direction in real time, ensuring the normal operation of the belt conveyor and thus protecting the company's production efficiency to a certain extent.

[0043] The present invention employs a tensioning roller assembly to ensure that the vibration of the conveyor belt is effectively suppressed after the raw coal is unloaded, thereby reducing vibration dust.

[0044] To address the issues of excessive coal residue and severe coal dust diffusion on the return surface of belt conveyors, this invention incorporates a spray cleaning component for micro-mist dust suppression, and a water sweeping component and a cleaning water chute component to treat and recycle the coal slurry water on the return surface, thus saving water resources while efficiently reducing dust.

[0045] This invention can calculate and deploy nozzles based on the nozzle spray area, thereby improving cleaning efficiency while saving resources. Attached Figure Description

[0046] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present disclosure and, together with the specification, further serve to explain the principles of the present disclosure and enable those skilled in the art to implement and use the present disclosure.

[0047] Figure 1 This is a schematic diagram of the structure of a belt return surface cleaning and dustproof conveyor according to an embodiment of the present invention;

[0048] Figure 2 This is a schematic diagram of the belt washing device of a belt return surface cleaning and dust prevention conveyor according to an embodiment of the present invention;

[0049] Figure 3 This is a schematic diagram of the tailstock of a tensioning device for a belt return surface cleaning and dustproof conveyor according to an embodiment of the present invention;

[0050] Figure 4 This is a schematic diagram of the structure of a spray cleaning component and a water sweeper component of a belt return surface cleaning and dust prevention conveyor according to an embodiment of the present invention;

[0051] Figure 5 This is a schematic diagram of a water sweeper assembly for a belt return surface cleaning and dustproof conveyor according to an embodiment of the present invention;

[0052] Figure 6 This is a flowchart illustrating a method for controlling a belt return surface cleaning and dust prevention conveyor according to an embodiment of the present invention.

[0053] [Figure Labels]

[0054] 1. Frame; 11. Drive unit frame; 12. Intermediate frame; 13. Support legs; 14. Idler roller frame; 15. Tensioning device tail frame; 16. Straightening idler roller;

[0055] 2. Transmission unit; 21. Reduction gear; 22. Drive unit; 23. Belt; 241. Drive drum; 242. Driven drum;

[0056] 3. Tensioning roller assembly; 31. Return idler roller; 32. Redirecting roller; 33. Slide groove; 34. Tie rod; 35. Tensioning shaft seat;

[0057] 4. Spray cleaning assembly; 41. Water pipe; 42. Air pipe; 43. Water tank; 44. Air compressor; 45. Filter; 46. Water pump; 47. Solenoid valve; 48. Water flow meter; 49. Air flow meter; 50. Control box;

[0058] 5. Water sweeper assembly; 51. Scraper; 52. Water sweeper bracket; 53. Fixing rod; 54. Adjusting nut; 55. Micro-mist nozzle; 6. Cleaning water chute assembly.

[0059] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0060] The following is a detailed description of a belt return surface cleaning and dustproof conveyor and its control method provided by the present invention, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0061] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0062] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0063] It is understood that the meanings of “on”, “above” and “above” in this disclosure should be interpreted in the broadest sense, such that “on” means not only “directly on” something, but also includes something with an intermediary feature or layer, and that “above” or “above” means not only “on” something, but also includes something “above” or “above” without an intermediary feature or layer.

[0064] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0065] like Figures 1-6 As shown, this application provides a belt return surface cleaning and dust prevention conveyor and its control method.

[0066] like Figure 1 As shown, a belt return surface cleaning and dustproof conveyor includes a frame 1, which is preferably assembled from channel steel. The frame 1 includes an intermediate frame 12, a drive unit frame 11, and a tensioning device tail frame 15. The drive unit frame 11 is located at one end of the intermediate frame 12 and is used to support the transmission unit 2. The tensioning device tail frame 15 is located at the other end of the intermediate frame 12 and is used to support the tensioning roller assembly 3. At least two sets of support legs 13 are evenly arranged on the lower surface of the intermediate frame 12. The support legs 13 are used to support the intermediate frame 12. A roller frame 14 is provided above each set of support legs 13 and is installed on the upper surface of the intermediate frame 12.

[0067] Each idler frame 14 is equipped with a grooved idler. The idler closest to the tail frame 15 of the tensioning device is the correction idler 16, which is used to correct the direction of the belt 23. A through hole is opened on the intermediate frame 12 near the tail frame of the tensioning device. The correction idler frame of the correction idler 16 is inserted into the through hole and can rotate in the through hole. Vertical stop rollers are provided at both ends of the correction idler 16. When the conveyor is running, if the belt 23 deviates, one side of the belt 23 presses on the vertical stop roller. Due to the force, the vertical stop roller will drive the correction idler frame of the correction idler 16 to rotate around the vertical axis by an angle in the through hole. The vertical stop roller will give the belt 23 the opposite pressure and friction, causing the belt 23 to deviate towards the center of the conveyor, thereby achieving correction.

[0068] The transmission unit 2 includes a reduction gear 21, a drive gear 22 and a drive roller 241. The drive roller 241 is mounted on the drive gear frame 11. Both the drive gear 22 and the reduction gear 21 are connected to and control the drive roller 241.

[0069] The tensioning roller assembly 3 includes a driven roller 242, which is mounted on the tailstock 15 of the tensioning device. A belt 23 is tensioned between the outer surfaces of the driving roller 241 and the driven roller 242. The driving device 22 provides power to the driving roller 241 to rotate, and the driving roller 241 drives the driven roller 242 to rotate via the belt 23. At the same time, the belt 23 transmits power between the driving roller 241 and the driven roller 242. During the transmission of the belt 23, the surface above the intermediate frame 12 is the belt bearing surface, and the surface below the intermediate frame 12 is the belt return surface. Idler rollers support the belt bearing surface. Multiple sets of return idler rollers 31 are evenly spaced between the legs on the lower surface of the intermediate frame 12. The return idler rollers 31 are used to support the return surface of the belt and keep it horizontal.

[0070] Tensioning bearings 35 are connected to both ends of the driven roller 242. The tail frame 15 of the tensioning device has grooves 33 on both sides. The grooves 33 are formed by four pressure strips to form a slide rail. The tensioning bearings 35 are slidably connected to the slide rails of the grooves 33. The tensioning bearings 35 are connected to a pull rod 34. By pulling the pull rod 34, the tensioning bearings 35 can be controlled to slide on the grooves 33, thereby controlling the position of the driven roller 242. The belt 23 is tightened by pulling the pull rod 34 outward.

[0071] Both the drive unit frame 11 and the tensioning device tail frame 15 are equipped with redirecting rollers 32 on their inner sides. The position of the redirecting rollers 32 can be manually adjusted. The redirecting rollers 32 are used to increase the wrap angle between the drive roller 241 and the driven roller 242 and the belt 23, thereby increasing friction and tightening the belt 23. After the belt 23 has finished unloading, by controlling the driven roller 242, the return idler roller 31 located below the return surface of the belt, and the redirecting roller 32, the three work together to "lift" the return surface of the belt, so that it is in a state of force support.

[0072] like Figures 3-5 As shown, a belt washing device is provided below the intermediate frame 2. The belt washing device includes a spray cleaning component 4, a water sweeper component 5, and a cleaning water chute component 6. The cleaning water chute component 6 is grooved, preferably boat-shaped. The spray cleaning component 4 and the water sweeper component 5 are located inside the groove of the cleaning water chute component 6. The cleaning water chute component 6 is installed below the return surface of the belt. The cleaning water chute component 6 can be inserted into a sewage pipe, which is connected to a sewage purification and circulation device.

[0073] like Figures 3-4As shown, both the spray cleaning assembly 4 and the water cleaner assembly 5 are electrically connected to the control box 50. Air pipes 42 and water pipes 41 are installed on both sides of the intermediate frame 12 to provide high-pressure gas and high-pressure liquid to the nozzles of the spray cleaning assembly 4 and the water cleaner assembly 5, ultimately forming a high-pressure micro-mist at the nozzles. This high-pressure micro-mist cleans the coal dust adhering to the return surface of the conveyor belt, forming coal slurry water, thereby achieving a dust suppression effect. The spray cleaning assembly 4 includes a spray assembly, and the nozzles within the spray assembly are preferably micro-mist nozzles. One end of both the water pipe 41 and the air pipe 42 is connected to the spray assembly, and the other end of the water pipe 41 is connected to a water tank 43. A filter 45, a water pump 46, a solenoid valve 47, a water flow meter 48, and a booster pump are sequentially installed on the pipeline connecting the water tank 43 and the water pipe 41. The other end of the air pipe 42 is connected to an air compressor 44, and a solenoid valve 47 and an air flow meter 49 are sequentially installed on the pipeline connecting the air compressor 44 and the air pipe 42. Both the air compressor 44 and the water pump 46 are connected to regulating valves, which are used to control the flow rates of the air compressor 44 and the water pump 46. A booster pump is installed on the water pipe 41 to increase the water pressure of the belt washing device spray system.

[0074] At least one spray assembly is installed at the bottom of the cleaning water chute assembly 6 and aligned with the belt return surface; there are n sets of spray assemblies, each set of spray assemblies has k rows of nozzles, the nozzles are preferably pressure-sensitive micro-mist nozzles, the nozzle direction is perpendicular to the running direction of the belt 23, and the value of n is preferably the same as the number of support legs 13; the number of nozzles in each row is m, the nozzles are evenly distributed below the belt return surface and directly facing the belt return surface by a fixed bracket, the formula for calculating the number m of nozzles in each row of the spray assembly is formula (1), and the formula for calculating the number n of the spray assembly is formula (2):

[0075]

[0076]

[0077] a is the width of belt 23;

[0078] b is the length of belt 23;

[0079] S represents the effective spray area of ​​the nozzle of the spray assembly.

[0080] like Figures 3-5 As shown, the water cleaner assembly 5 is located below the belt return surface and is used to clean the coal slurry water generated on one side of the belt bearing surface under spraying and the coal slurry water remaining on the belt return surface.

[0081] The water cleaner assembly 5 includes at least one set of water cleaner brackets 52. In this embodiment, the number of water cleaner brackets 52 is equal to the number of spray components. Each water cleaner bracket 52 has a fixing rod 53 on both sides. In this embodiment, the fixing rod 53 is preferably perpendicular to the water cleaner bracket 52. The fixing rod 53 is threaded. The base of the intermediate frame 12 has grooves on both sides, and adjusting nuts 54 are provided in the grooves. The water cleaner brackets 52 are threaded together with the adjusting nuts 54 through the threads on the fixing rods 53 on both sides. The water sweeper bracket 52 is suspended from the base of the intermediate frame 12 by a threaded groove 53. The belt return surface is located below the base of the intermediate frame 12. The scraper 51 is mounted on the water sweeper bracket 52, and a 4mm flat iron is used to connect the scraper 51 and the water sweeper bracket 52. The scraper 51 is aligned with the belt return surface. By adjusting the engagement between the adjusting nut 54 and the thread on the fixing rod 53, the suspension position of the water sweeper bracket 52 can be controlled, thereby controlling the distance between the water sweeper bracket 52 and the belt return surface. The scraper 51 is preferably made of polyurethane, which has good wear resistance, flame retardant properties, and good deformation. The adjusting nut 54 provides tension to suspend the water sweeper assembly 5 above the ground below the intermediate frame 12. The adjustment range is preferably 5-50mm, which ensures that the scraper 51 and the belt 23 are in full contact during the on-site installation of the belt washing device, ensuring that the belt 23 passing through the belt washing device is in a flat plane.

[0082] The water cleaner bracket 52 has a high-pressure water connector and a high-pressure gas connector at both ends, which are respectively connected to the water pipe 41 and the air pipe 42. The scraper 51 is equipped with a micro-mist nozzle 55, which is pressure-sensitive controlled. The micro-mist nozzle 55 is connected to the high-pressure water connector and the high-pressure gas connector to form a micro-mist.

[0083] Adjusting the adjusting nuts 54 on both sides allows for overall height adjustment of the water sweeper assembly 5, causing the belt return surface and scraper 51 to press against each other. This enhances the contact between the water sweeper assembly 5 and the belt return surface, increasing cleaning power, and also tightens the belt 23. The scraper 51 is equipped with a micro-mist nozzle 55 for self-cleaning and pre-wetting of the belt return surface, while also addressing the high-temperature heating problem caused by sliding friction between the scraper 51 and the belt 23. The side of the scraper 51 with the micro-mist nozzle 55 forms an acute angle with the belt return surface.

[0084] There are c groups of scrapers 51, and each group of scrapers 51 is equipped with q rows of micro-mist nozzles 55. The number of micro-mist nozzles 55 in each row on the scraper 51 is d. The micro-mist nozzles 55 are located below the belt return surface and aligned with the belt return surface. The formula for calculating the number d of micro-mist nozzles 55 in each row on the scraper 51 is formula (3), and the formula for calculating the number c of scrapers 51 is formula (4).

[0085]

[0086]

[0087] 'a' represents the width of the belt (23).

[0088] b is the length of belt 23;

[0089] S1 is the effective spray area of ​​the micro-mist nozzle 55 on the scraper 51.

[0090] Solenoid valve 47 controls the start and stop of spray cleaning assembly 4 and water sweeper assembly 5. The two solenoid valves 47 are electrically connected to control box 50 and controlled by control box 50. The switch of transmission unit 2 is electrically connected to control box 50. When transmission unit 2 is turned on or off, it sends a signal to control box 50. Control box 50 controls the two solenoid valves 47 to open or close according to the signal. That is, the conveyor starts and stops at the same time as spray cleaning assembly 4 and water sweeper assembly 5.

[0091] like Figure 2 As shown, the angle between the two sides of the cleaning water chute assembly 6 along the intermediate frame 12 and the ground is preferably less than 30° to ensure full utilization of space. The coal sludge water that is rinsed by the spray cleaning assembly 4 and the water sweeper assembly 5 and scraped into the cleaning water chute assembly 6 by the scraper 51 can be pumped out through the pipeline to the water storage tank for decontamination treatment, realizing the recycling of water resources.

[0092] like Figure 6 As shown, a control method for a belt return surface cleaning and dust prevention conveyor includes the following steps:

[0093] S1. Before starting the belt return surface cleaning and dustproof conveyor, pull the lever 34 to control the tensioning shaft seat 35 of the driven roller to slide in the slide groove 33, thereby controlling the position of the driven roller. At the same time, manually adjust the position of the redirecting roller 32 and, with the support of the return idler roller 31, the three work together to flatten the belt 23, so that the belt return surface is in a stable tension state, ensuring that the belt return surface in the belt washing device is in a straight and non-vibrating state.

[0094] S2. Determine the arrangement scheme of the nozzles of the spray cleaning assembly and the water cleaner assembly based on the calculation results of the number of nozzles m in each row of the spray assembly, the number of spray assemblies n, the number of nozzles d in each row of the scraper and the number of scrapers c.

[0095] S3. Start the deceleration device 21 and drive device 22 to drive the active roller to drive the driven roller to work and make the belt 23 perform transmission motion. The nozzle of the spray cleaning component 4 and the micro-mist nozzle 55 of the water cleaner component 5 spray spray to wet both sides of the belt return surface, so that the coal dust particles attached to the belt 23 flocculate into small coal slurry water particles, thereby inhibiting the spread of dust.

[0096] S4. Because water adheres to the belt 23, the surface of the belt 23 becomes smooth, which can easily cause the belt 23 to run off course. The off-course belt 23 hits the vertical stop roller of the correction roller 16. The vertical stop roller is forced to rotate the correction roller frame at a certain angle, so that the belt 23 returns to the correct course. At the same time, small particles of coal slurry water also adhere to the return surface of the belt. Adjust the position of the water cleaner bracket 52 so that it can contact the return surface of the transmission belt. The scraper 51 of the water cleaner assembly 5 scrapes off the coal slurry water on the return surface of the belt. During the scraping process, the micro-mist nozzle 55 is pressurized to spray water mist to clean the scraper 51 and the return surface of the belt.

[0097] S5. At the same time as shutting down the transmission unit 2, the switch of the drive device 22 sends a signal to the control box 50. The control box 50 receives the signal and controls the two solenoid valves 47, which in turn controls the spray cleaning component 4 and the water cleaner component 5 to shut down synchronously with the transmission unit 2. Under the joint operation of the scraper 51 and the micro-mist nozzle 55, the coal slurry water is cleaned into the boat-shaped groove of the cleaning water chute component 6 below the belt return surface. The sewage is then inserted into the sewage pipe to recover the sewage. The sewage pipe is connected to the purification and circulation device for sewage recycling.

[0098] The technical effect of this invention is that, in response to the problem that belts are prone to deviating during operation after being wetted, a corrective roller is set up to adjust the belt direction in real time, so that the belt transport can operate normally and to a certain extent protect the production efficiency of enterprises.

[0099] The present invention employs a tensioning roller assembly to ensure that the vibration of the conveyor belt is effectively suppressed after the raw coal is unloaded, thereby reducing vibration dust.

[0100] To address the issues of excessive coal residue and severe coal dust diffusion on the return surface of belt conveyors, this invention incorporates a spray cleaning component for micro-mist dust suppression, and a water sweeping component and a cleaning water chute component to treat and recycle the coal slurry water on the return surface, thus saving water resources while efficiently reducing dust.

[0101] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary confusion regarding the nature of the invention, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0102] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A belt return surface cleaning and dustproof conveyor, characterized in that, The device includes a frame, one end of which is equipped with a transmission unit, and the other end of which is equipped with a tension roller assembly. The transmission unit and the tension roller assembly cooperate to drive a belt on the frame. The frame is equipped with a belt alignment device for correcting the belt's deviation. The frame includes an intermediate frame, a drive unit frame, and a tensioning device tail frame. The drive unit frame is located at one end of the intermediate frame, and the tensioning device tail frame is located at the other end of the intermediate frame. The inner sides of both the drive unit frame and the tensioning device tail frame are provided with redirecting rollers. A return idler is located below the intermediate frame, and the return idler is used to support the return surface of the belt. The transmission unit includes a reduction gear, a drive gear, and a drive roller. The reduction gear is connected to and controls the drive roller, and the drive gear is connected to and drives the drive roller. The tensioning roller assembly includes a driven roller, with tensioning shaft seats connected to both ends of the driven roller's bearing. The tailstock of the tensioning device has grooves on both sides, and the tensioning shaft seats are slidably connected within these grooves. A pull rod is connected to each tensioning shaft seat, allowing the tensioning shaft seat to slide on the grooves by pulling the pull rod. A belt is tensioned between the driving roller and the driven roller, and the belt drives the transmission between the driving roller and the driven roller. A belt washing device is provided below the frame. The belt washing device includes a spray cleaning component, a water sweeper component, and a cleaning water chute component. The spray cleaning component and the water sweeper component are located inside the cleaning water chute component. The cleaning water chute component is in the shape of a boat-shaped groove and is installed below the intermediate frame. The cleaning water chute component is connected to a sewage discharge and purification circulation device. The spray cleaning assembly includes n sets of spray assemblies, each set of spray assemblies has k rows of nozzles, and each row of nozzles has m nozzles. The formula for calculating the number m of nozzles in each row of the spray assembly is formula (1), and the formula for calculating the number n of the spray assemblies is formula (2). （1） （2） Wherein, S is the effective spray area of ​​the nozzle of the spray assembly; a is the width of the belt; and b is the length of the belt. The water cleaner assembly includes c sets of scrapers, each set of scrapers is provided with q rows of nozzles, and the number of nozzles in each row of the scrapers is d. The formula for calculating the number of nozzles d in each row of the scrapers is formula (3), and the formula for calculating the number of scrapers c is formula (4). （3） （4） Wherein, S1 is the effective spray area of ​​the nozzle on the scraper; The nozzles of the spray cleaning assembly and the water sweeper assembly face the return surface of the belt. The spray cleaning assembly and the water sweeper assembly are electrically connected to the control box. The start and stop of the spray cleaning assembly and the water sweeper assembly are controlled by a solenoid valve. The control box is electrically connected to the solenoid valve and controls the solenoid valve. The switch of the transmission unit is electrically connected to the control box. The transmission unit starts and stops simultaneously with the spray cleaning assembly and the water sweeper assembly. Air pipes and water pipes are installed on both sides of the intermediate frame.

2. The belt return surface cleaning and dustproof conveyor according to claim 1, characterized in that, At least two sets of support legs are evenly arranged on the lower surface of the intermediate frame, and a roller frame is provided above each set of support legs. The roller frame is installed on the upper surface of the intermediate frame. Each roller frame is provided with a roller, which supports the bearing surface of the belt. A return roller is provided between each of the support legs on the lower surface of the intermediate frame. The return roller is used to support the return surface of the belt.

3. The belt return surface cleaning and dustproof conveyor according to claim 1, characterized in that, The correction device includes a correction roller frame, a correction roller, and a vertical stop roller. A through hole is provided on the intermediate frame near the tail frame of the tensioning device. The correction roller frame is rotatably connected to the through hole. The vertical stop roller is located at both ends of the correction roller. The vertical stop roller can drive the correction roller frame to rotate when subjected to force.

4. The belt return surface cleaning and dustproof conveyor according to claim 1, characterized in that, The angle between the two sides of the cleaning water chute assembly along the intermediate frame and the ground is less than 30°; the coal slurry water, which is washed by the spray cleaning assembly and the water sweeper assembly and scraped into the cleaning water chute assembly by the scraper, is pumped out through the pipeline to the water storage tank for decontamination treatment, so as to realize the recycling of water resources.

5. The belt return surface cleaning and dustproof conveyor according to claim 1, characterized in that, At least one spray assembly is provided, which is installed within the boat-shaped groove of the cleaning water chute assembly. One end of each water pipe and air pipe is connected to the spray assembly. The other end of each water pipe is connected to a water tank, and a filter, a water pump, a solenoid valve, a water flow meter, and a booster pump are sequentially installed on the pipeline connecting the water tank and the water pipe. The other end of each air pipe is connected to an air compressor, and a solenoid valve and an air flow meter are sequentially installed on the pipeline connecting the air compressor and the air pipe. Both the air compressor and the water pump are connected to regulating valves, and both the air compressor and the water pump are controlled by the regulating valves. The nozzle of the spray assembly is located below the return surface of the belt and aligned with the return surface of the belt.

6. The belt return surface cleaning and dustproof conveyor according to claim 1, characterized in that, The water sweeper assembly includes at least one set of water sweeper brackets. Each water sweeper bracket has a fixing rod on one side, and the fixing rods are threaded. The intermediate frame base has grooves on both sides, and adjusting nuts are installed in the grooves. The water sweeper brackets are suspended from the lower end of the intermediate frame base by the threaded engagement of the fixing rods with the adjusting nuts. A scraper is mounted on the water sweeper brackets, and the scraper is aligned with the return surface of the belt. The distance between the water sweeper brackets and the return surface of the belt can be controlled by adjusting the adjusting nuts.

7. The belt return surface cleaning and dustproof conveyor according to claim 6, characterized in that, The water cleaner bracket has a high-pressure water connector and a high-pressure gas connector at both ends, which are respectively connected to the water pipe and the gas pipe. The nozzle on the scraper is connected to the high-pressure water connector and the high-pressure gas connector. The nozzle of the scraper is located below the return surface of the belt and aligned with the return surface of the belt.

8. A control method for a belt return surface cleaning and dust prevention conveyor, utilizing the belt return surface cleaning and dust prevention conveyor as described in any one of claims 1-7, characterized in that, The control method includes the following steps: S1. Before starting the belt return surface cleaning and dustproof conveyor, pull the lever to adjust the position of the tensioning roller assembly, and at the same time manually adjust the position of the redirecting roller, and flatten the belt under the support of the return idler roller, so that the belt is in a stable tension state. S2. Based on the calculation results of the number m of each row of nozzles in the spray assembly, the number of spray assemblies n, the number d of each row of nozzles on the scraper and the number of scrapers c, determine the arrangement scheme of the nozzles of the spray cleaning assembly and the nozzles of the water cleaner assembly. S3. Drive the transmission unit to drive the belt to perform transmission motion. The nozzles of the spray cleaning component and the water cleaner component wet both sides of the return surface of the belt, causing the coal dust particles attached to the belt to flocculate into coal slurry water, thereby inhibiting dust diffusion. S4. The correction device corrects the misaligned belt, the scraper and the nozzle on the scraper clean the belt, and scrapes the coal slurry water into the cleaning water chute assembly. S5. Shut down the transmission unit and the belt washing device, recover the sewage in the cleaning water chute assembly, and reuse the sewage through the sewage purification and circulation device.

9. The control method for cleaning and dustproofing the belt return surface of a conveyor according to claim 8, characterized in that, S5 includes: while shutting down the transmission unit, the switch of the transmission unit sends a signal to the control box, the control box controls the spray cleaning component and the water sweeper component to shut down synchronously with the transmission unit by controlling the solenoid valve, and a sewage pipe is inserted into the boat-shaped groove of the cleaning water chute component to recycle sewage, and the sewage pipe is connected to the sewage purification and circulation device for sewage recycling.

Images