A belt conveyor drum cleaning device

Abstract

The application discloses a belt conveyor drum cleaning device and relates to the technical field of conveying, which comprises a scraper, a spiral conveyor, a transmission assembly for connecting the spiral conveyor and the rotating shaft of the drum, and a discharge pipe installed at the end of the spiral conveyor; a blockage prevention assembly for dredging the discharge pipe is installed in the discharge pipe, one side of the blockage prevention assembly is connected to a reset assembly so that the blockage prevention assembly can return to the retracted state; the blockage prevention assembly can dredge the discharge pipe when it is in the expanded state. The application integrates the functions of cleaning, conveying and dynamic blockage prevention, makes full use of the power of the main machine, realizes efficient, reliable and maintenance-free drum cleaning, and realizes the dredging of the discharge pipe by rotating the cam with the rotation of the mandrel and regularly switching the blockage prevention assembly between the retracted and expanded states, thereby ensuring the smooth discharge of the discharge pipe.

Description

Technical Field

[0001] This invention relates to the field of conveying technology, and more specifically to a belt conveyor roller cleaning device. Background Technology

[0002] Belt conveyors, with their efficient and stable material conveying capabilities and convenient maintenance, have become indispensable key equipment in mining, coal preparation, and other fields. During long-term operation, coal dust, mud, moisture, and other foreign matter easily adhere to the surface of the conveyor belt and the drive or idler rollers. If these deposits are not cleaned in time, they will not only reduce transmission efficiency and accelerate wear on the rollers and conveyor belt, but may also cause belt misalignment, slippage, and other problems, seriously affecting the normal operation and service life of the equipment.

[0003] To address the issue of drum surface cleaning, the common practice is to install scrapers or other similar cleaning tools near the tail drum to mechanically remove surface deposits. Our current technology employs a combined scraper and foreign object collection method. After the scraper removes foreign objects, the loose material falls into a specialized foreign object collection device, which then discharges it through a vertically positioned discharge pipe at the end of this device. This structure achieves a certain degree of directional collection and discharge of foreign objects, providing effective cleaning.

[0004] However, in practical applications, due to site layout and structural design requirements, the length of the discharge pipe is typically 3-5 meters. During long-distance vertical or near-vertical discharge, especially when the material has high moisture content, high viscosity, or contains fibers or impurities, it is prone to adhering to the pipe walls, accumulating, or even completely blocking the pipe. Blockage not only causes the cleaning system to fail but also requires machine shutdown for manual unblocking, severely impacting production continuity and increasing maintenance costs and safety risks. Therefore, addressing the prominent problem of easy blockage in the discharge pipe section of existing belt conveyor roller cleaning devices, it is urgent to rationally improve its structure and design a cleaning device that can effectively clean foreign objects from the roller surface while ensuring smooth discharge and preventing blockage. This is of great significance for improving equipment reliability, reducing maintenance workload, ensuring production efficiency, and ensuring operational safety. Summary of the Invention

[0005] The purpose of this invention is to provide a belt conveyor roller cleaning device that integrates scraping, foreign object collection and anti-clogging functions, so as to solve the above-mentioned defects caused by the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a belt conveyor roller cleaning device, comprising a scraper and a screw conveyor (equivalent to a foreign matter collection device), wherein the scraper is disposed on the side of the screw conveyor near the roller and is used to scrape off foreign matter from the surface of the roller, and the screw conveyor is used to collect the scraped foreign matter.

[0007] In addition to the components mentioned above, the cleaning device also includes a transmission assembly for connecting the screw conveyor and the roller to a rotating shaft and a discharge pipe installed at the end of the screw conveyor.

[0008] The discharge pipe is equipped with an anti-blocking component for unblocking the discharge pipe. One side of the anti-blocking component is connected to a reset component so that the anti-blocking component can return to the retracted state.

[0009] The slide in the reset assembly can contact the cam at the end of the screw conveyor spindle and drive the slide to move downward. During the downward movement of the slide, the anti-blocking assembly can be deployed and the discharge pipe can be cleared.

[0010] Furthermore, the screw conveyor includes a discharge channel, a mandrel, and screw blades;

[0011] The two ends of the discharge channel are connected to the frame by means of support members, the mandrel is connected to the support members by means of bearings and the spiral blades are installed on the outer periphery of the mandrel, and one end of the mandrel is also connected to the transmission assembly.

[0012] Furthermore, the transmission assembly includes a main sprocket, a secondary sprocket, and a tension sprocket connected in sequence by a chain;

[0013] The main sprocket is mounted on one end of the shaft so that the power of the drum can be transmitted through the main sprocket. The secondary sprocket is mounted on one end of the spindle. The tension sprocket is mounted on a bearing seat located at the upper end of the frame by means of a bearing.

[0014] Furthermore, the anti-clogging assembly includes multiple unblocking rods and a connecting rod for connecting the multiple unblocking rods together, the lower end of the unblocking rods being rotatably connected to a support, the support being installed on the inner wall of the discharge pipe;

[0015] A horizontal drive rod is fixed to the upper end of the topmost unblocking rod.

[0016] Furthermore, the reset assembly includes a slide, a support arm, a guide post, and a reset spring;

[0017] The slide is located on the inner wall of the discharge pipe and is fixedly connected to the support arm. The side wall of the discharge pipe is provided with a guide hole for the support arm to move. The lower end of the support arm is equipped with a base, and the guide post is installed on the base. The guide post passes through the guide seat located below the support arm and can slide relative to the guide seat. One side of the guide seat is fixedly connected to the outer wall of the discharge pipe. The return spring is sleeved on the guide post located between the base and the guide seat.

[0018] The slide block is provided with a horizontal guide hole that cooperates with the drive rod.

[0019] Furthermore, the back of the slide is tightly attached to the inner wall.

[0020] Furthermore, at least one reinforcing rib is connected between the base and the support arm.

[0021] Furthermore, the support member is detachably connected to the frame.

[0022] Furthermore, the scraper is installed on one side of the drum in the discharge channel.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] 1. This invention uses a scraper to remove foreign objects adhering to the surface of the drum and collect them into the discharge channel. Then, the spiral blades transport the foreign objects to the discharge pipe for discharge, thus realizing the directional collection and discharge of foreign objects. The transmission component smoothly outputs the power of the drum to the spiral conveyor, eliminating the need for a separate power source, simplifying the structural design, and reducing equipment costs.

[0025] 2. Considering that the discharge pipe in this invention is relatively long, an anti-blocking component is provided at the discharge pipe. The rotation of the spindle drives the cam to rotate, and the anti-blocking component switches regularly between the retracted and extended states, thereby clearing the discharge pipe and ensuring smooth material discharge. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention;

[0027] Figure 2 This is a top view of the present invention;

[0028] Figure 3 for Figure 2 Detailed view of part A in the middle;

[0029] Figure 4 This is a schematic diagram of the screw conveyor and discharge pipe in this invention;

[0030] Figure 5 for Figure 4 Detailed view of section B in the middle;

[0031] Figure 6 This is a schematic diagram of the cam and discharge pipe parts in this invention;

[0032] Figure 7 This is a schematic diagram of the anti-clogging component in the present invention;

[0033] Figure 8 for Figure 7 Detailed view of section C in the middle;

[0034] in:

[0035] 1-Drum, 11-Shaft;

[0036] 2-Scraper, 21-Scraper body, 22-Adjustable mounting base

[0037] 3-Screw conveyor, 31-Discharge channel, 32-Support component, 33-Mandrel, 34-Screw blade;

[0038] 4-Transmission assembly, 41-Main sprocket, 42-Secondary sprocket, 43-Tension sprocket, 44-Chain;

[0039] 5-Discharge pipe, 51-Guide hole;

[0040] 6-Anti-clogging component, 61-Drainage rod, 62-Connecting rod, 63-Support, 64-Drive rod;

[0041] 7-Reset assembly, 71-Slide, 711-Guide hole, 72-Support arm, 73-Guide post, 74-Reset spring, 75-Base, 76-Guide seat, 77-Reinforcing rib;

[0042] 8-Cam. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0044] It should be noted that in the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] The core technical concept of this invention lies in the organic integration of scraping, collecting, conveying and dynamic anti-clogging functions, and the use of the conveyor's own power to efficiently solve the problems of easy clogging in the cleaning of the roller surface and subsequent material discharge.

[0046] like Figures 1 to 8 As shown, the present invention provides a belt conveyor roller cleaning device, which is installed on the frame of the belt conveyor, specifically located below the side of the tail drive roller or redirecting roller 1. It mainly consists of a scraper 2, a screw conveyor 3, a transmission assembly 4, a discharge pipe 5, and an anti-blocking assembly 6 and a reset assembly 7 integrated within the discharge pipe 5.

[0047] 1. Scraper 2 and screw conveyor 3

[0048] The scraper 2 comprises a wear-resistant alloy scraper body 21 and an adjustable mounting base 22. The scraper body 21 is fixed to the adjustable mounting base 22 by bolts, and the adjustable mounting base 22 is fixed to the top side wall of the discharge channel 31 of the screw conveyor 3 via a slotted hole and locking bolts, facing the roller 1. This design allows the operator to loosen the locking bolts and adjust the cutting angle and clamping force of the scraper body 21 relative to the surface of the roller 1 to adapt to different wear conditions and cleaning intensity requirements, ensuring optimal scraping effect and extending the service life of the scraper 2. For highly viscous materials, multi-layer scrapers or composite scrapers can be used. For example, a secondary scraper made of rubber can be set after the first main scraper for secondary cleaning and sealing, improving cleanliness.

[0049] The screw conveyor 3 serves as the main unit for collecting and horizontally conveying foreign objects. Its main body is a U-shaped discharge channel 31 formed by bending and welding steel plates, arranged parallel to the axis of the drum 1. The top of the discharge channel 31 is open to receive scraped-off foreign objects. Both ends of the discharge channel 31 are fixed by detachable supports 32 (e.g., rigid brackets bolted to the frame) for easy installation and maintenance. A spindle 33 is supported on the supports 32 by rolling bearings at both ends. Continuous standard solid-face spiral blades 34 are welded onto the spindle 33. One end of the spindle 33 is the power input end, extending outwards to the discharge channel 31 and the supports 32. When the conveyed foreign objects are mainly blocky or require a certain degree of agitation, the continuous solid-face spiral blades 34 can be replaced with ribbon-shaped or blade-shaped spiral blades. The scraper 2 is installed on the discharge channel 31 on one side of the drum 1.

[0050] 2. Transmission assembly 4

[0051] This invention creatively utilizes the rotation of the drum 1 as a power source to drive the screw conveyor 3. The transmission assembly 4 adopts a chain drive form, specifically including: a main sprocket 41 fixedly installed at the end of the shaft 11 of the drum 1, a secondary sprocket 42 fixedly installed at the power input end of the spindle 33 of the screw conveyor 3, and a tension sprocket 43 mounted on the frame with an adjustable position. A closed chain 44 surrounds the three components. By adjusting the installation position of the tension sprocket 43, the tension of the chain 44 can be easily adjusted, ensuring smooth and reliable transmission, and eliminating the need for additional motors and reducers, significantly reducing equipment costs and energy consumption. In situations where space is limited or quieter operation is required, synchronous belt drive can be used instead of chain drive. The main and secondary synchronous belt pulleys are connected by a synchronous belt, which also has the advantages of precise transmission and low noise. In addition, if site conditions permit, a universal coupling can be used to directly connect a reducer output shaft led out from the shaft 11 to form a rigid transmission.

[0052] 3. Anti-blocking component 6 and reset component 7

[0053] The discharge pipe 5 is a vertical steel pipe, the upper end of which is integrally connected to the discharge port at the end of the discharge channel 31 of the screw conveyor 3.

[0054] The anti-clogging component 6 is installed inside the discharge pipe 5, and its function is to periodically break up any material blockages that may form. This component includes ten unblocking rods 61 (the number can be adjusted according to the pipe length) linearly and evenly distributed along the inner wall of the discharge pipe 5, and connecting rods 62 connecting the upper parts of these ten unblocking rods 61. The lower end of each unblocking rod 61 is hinged to a support 63 fixed to the inner wall of the discharge pipe 5 by a pin. A horizontally extending drive rod 64 is fixed to the top of the uppermost unblocking rod 61. Nylon or polyurethane scrapers can be installed on the sides of the unblocking rods 61 to reduce wear and noise and enhance the crushing effect.

[0055] The reset assembly 7 is used to control the operation cycle of the anti-blocking assembly 6. It includes a slide 71 that can slide vertically along the inner wall of the discharge pipe 5, with the back of the slide 71 in close contact with the inner wall. The back of the slide 71 is in contact with the inner wall of the discharge pipe 5, and a horizontal guide hole 711 is opened on its front side, into which the outer end of the drive rod 64 is inserted. A support arm 72 is fixed to the outer side of the slide 71, extending outward through the vertical guide hole 51 on the side wall of the discharge pipe 5. A base 75 is fixed to the lower end of the support arm 72, and at least one guide post 73 is vertically fixed to the base 75. At least one reinforcing rib 77 is also connected between the base 75 and the support arm 72. The guide post 73 passes through a guide seat 76 fixed to the outer wall of the discharge pipe 5, and each guide post 73 is fitted with a pre-compressed reset spring 74, which is constrained between the base 75 and the guide seat 76.

[0056] 4. Cam 8

[0057] To enable the anti-blocking component 6 to operate automatically and periodically, a non-circular cam 8 is coaxially fixed at the other end of the screw conveyor 3, opposite the power input end of the spindle 33. The outer contour of the cam 8 is designed such that when the spindle 33 rotates, the long axis portion of the cam 8 contacts the top of the slide block 71 and presses down once for each revolution.

[0058] The working process of this invention is as follows:

[0059] During equipment operation, drum 1 rotates continuously. Power transmission is divided into two paths:

[0060] Cleaning and conveying path: The rotation of roller 1 moves foreign objects on its surface to the contact point with scraper 2, where they are scraped off. The foreign objects fall into the discharge channel 31 of screw conveyor 3 through the feed inlet. At the same time, the rotation of roller 1 drives the spindle 33 and the spiral blades 34 to rotate synchronously through the transmission assembly 4 (main sprocket 41 → chain 44 → secondary sprocket 42). The rotating spiral blades 34 continuously push the foreign objects that fall into the discharge channel 31 towards the discharge end, and finally push them into the vertical discharge pipe 5, where they fall and are discharged by gravity.

[0061] Dynamic anti-clogging path: While conveying materials, the spindle 33 drives the cam 8 at its end to rotate synchronously. When the cam 8 rotates to the point where its long axis (protruding part) contacts the top of the slide 71, the slide 71 is pressed downward once. The slide 71 drives the base 75 to move downward through the support arm 72, further compressing the return spring 74. During this downward movement, the guide hole 711 on the slide 71 exerts a downward pressure on the drive rod 64. This force forces the drive rod 64 to drive the unblocking rod 61 fixed thereto, and then through the connecting rod 62, drives all the unblocking rods 61 to swing downward around their respective lower hinge points toward the central axis of the discharge pipe 5 (i.e., the "unfolded" state). The ten unblocking rods 61 move in the central area of ​​the pipe. This action can effectively agitate and break up any material adhesion layer or arch that may form in the upper part of the discharge pipe 5, thus eliminating the risk of clogging in advance. As the spindle 33 continues to rotate, the long axis part of the cam 8 rotates, and the downward pressure on the slide 71 disappears. At this point, the compressed return spring 74 releases its energy, pushing the base 75, support arm 72, and slide 71 upwards to reset. During this upward movement, the guide hole 711 applies an upward force to the drive rod 64, causing all the unblocking rods 61 of the anti-blocking assembly 6 to swing back to a "retracted" state, close to or against the pipe wall, clearing a path for the smooth flow of material. Thus, a complete "unblocking-resetting" cycle is completed. This cycle repeats continuously as long as the conveyor is running, achieving online, automatic, and periodic unblocking of the discharge pipe 5.

[0062] In summary, this invention integrates cleaning, conveying, and dynamic anti-clogging functions through ingenious mechanical linkage, and fully utilizes the main engine's power to achieve efficient, reliable, and maintenance-free drum cleaning. Those skilled in the art can make various combinations, modifications, and variations to the above embodiments within the scope of protection defined in the claims, and all such variations fall within the protection scope of this invention.

[0063] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or its equivalents are included in this invention.

Claims

1. A belt conveyor roller cleaning device, comprising a scraper and a screw conveyor, wherein the scraper is disposed on the side of the screw conveyor near the roller and is used to scrape foreign objects from the surface of the roller, and the screw conveyor is used to collect the scraped foreign objects; characterized in that It also includes a drive assembly for connecting the screw conveyor and the roller, and a discharge pipe installed at the end of the screw conveyor; The discharge pipe is equipped with an anti-blocking component for unblocking the discharge pipe. One side of the anti-blocking component is connected to a reset component so that the anti-blocking component can return to the retracted state. The slide in the reset assembly can contact the cam at the end of the screw conveyor spindle and drive the slide to move downward. During the downward movement of the slide, the anti-blocking assembly can be deployed and the discharge pipe can be cleared. The anti-clogging assembly includes multiple unblocking rods and a connecting rod for connecting the multiple unblocking rods together. The lower end of each unblocking rod is rotatably connected to a support, which is installed on the inner wall of the discharge pipe. A horizontal drive rod is fixed to the upper end of the topmost unblocking rod; The reset assembly includes a slide, a support arm, a guide post, and a reset spring; The slide is located on the inner wall of the discharge pipe and is fixedly connected to the support arm. The side wall of the discharge pipe is provided with a guide hole for the support arm to move. The lower end of the support arm is equipped with a base, and the guide post is installed on the base. The guide post passes through the guide seat located below the support arm and can slide relative to the guide seat. One side of the guide seat is fixedly connected to the outer wall of the discharge pipe. The return spring is sleeved on the guide post located between the base and the guide seat. The slide block is provided with a horizontal guide hole that cooperates with the drive rod.

2. The belt conveyor roller cleaning device according to claim 1, characterized in that, The screw conveyor includes a discharge channel, a spindle, and screw blades; The two ends of the discharge channel are connected to the frame by means of support members, the mandrel is connected to the support members by means of bearings and the spiral blades are installed on the outer periphery of the mandrel, and one end of the mandrel is also connected to the transmission assembly.

3. The belt conveyor roller cleaning device according to claim 2, characterized in that, The transmission assembly includes a main sprocket, a secondary sprocket, and a tension sprocket connected in sequence by a chain. The main sprocket is mounted on one end of the shaft so that the power of the drum can be transmitted through the main sprocket. The secondary sprocket is mounted on one end of the spindle. The tension sprocket is mounted on a bearing seat located at the upper end of the frame by means of a bearing.

4. The belt conveyor roller cleaning device according to claim 1, characterized in that, The back of the slide is in close contact with the inner wall.

5. A belt conveyor roller cleaning device according to claim 4, characterized in that, At least one reinforcing rib is also connected between the base and the support arm.

6. A belt conveyor roller cleaning device according to claim 2, characterized in that, The support component is detachably connected to the frame.

7. A belt conveyor roller cleaning device according to claim 2, characterized in that, The scraper is installed on the discharge channel on one side of the drum.

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