Foreign matter preventing device at tail of belt conveyor of coal preparation plant
By installing polyurethane-ceramic composite cleaning blades and an adaptive clamping system at the tail of the belt conveyor, combined with hot air drying, the problem of sticky and wet materials adhering to the surface is solved, achieving efficient material cleaning and equipment protection, and reducing maintenance costs.
Patent Information
- Application Number
- CN202511366149.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-24
- Publication Date
- 2025-11-18
AI Technical Summary
When belt conveyors transport sticky and wet materials, the materials tend to stick to the belt surface, leading to problems such as return belt contamination, equipment wear, spillage, and blockage. Existing cleaners wear out quickly, have high maintenance costs, and are ineffective for sticky and wet materials.
The cleaning blade, made of polyurethane-ceramic composite material, combined with a hydraulic or pneumatic adaptive clamping system and hot air drying, scrapes off adhering materials and accelerates moisture evaporation through hot air drying. The adaptive clamping system also adapts to surface fluctuations.
It effectively reduces belt surface wear, minimizes equipment wear and clogging, improves cleaning efficiency, lowers maintenance costs, prevents conveyor belt slippage, and achieves efficient material cleaning and drying.
Smart Images
Figure CN120964338A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of industrial equipment maintenance, in particular to a foreign matter prevention device for tail part of belt conveyor in coal preparation plant. BACKGROUND
[0002] When the belt conveyor carries sticky and wet materials such as coal, ore, grain and the like, the materials are easy to adhere to the belt surface, and if not cleaned thoroughly, it will lead to: return belt pollution: residual materials enter the return section, aggravating the wear of the roller and drum. Spillage and blockage: tail accumulation may cause equipment blockage or environmental pollution. Conveyor belt damage: hard materials (such as ore) may scratch the belt surface or embed into the drum.
[0003] The traditional sweeper types include a scraper sweeper and a rotary brush sweeper. The scraper sweeper adopts alloy scraper or polyurethane blade, and presses the conveyor belt through spring or counterweight, which is fast-wearing and needs frequent pressure adjustment, and has high risk of belt surface damage. The rotary brush sweeper is a nylon or steel wire brush roller, which is driven to rotate for cleaning, and has poor effect on sticky and wet materials and high maintenance cost. Therefore, it is necessary to design a foreign matter prevention device for tail part of belt conveyor in coal preparation plant for sticky and wet materials. SUMMARY
[0004] The present application aims to provide a foreign matter prevention device for tail part of belt conveyor in coal preparation plant to solve the problems in the background.
[0005] In order to solve the above technical problems, the present application provides the following technical scheme: a foreign matter prevention device for tail part of belt conveyor in coal preparation plant, comprising a conveyor belt, one side of the conveyor belt is provided with a fixed seat, a conveyor roller is rotatably installed on the side wall of the fixed seat, the outer wall of the conveyor roller is in contact with the conveyor belt, a blade mounting rod is rotatably installed on one side of the fixed seat, an installation head is connected to the top of the blade mounting rod, a cleaning blade is arranged on the top of the installation head, the cleaning blade is in contact with the conveyor belt, a T-shaped groove is formed in the bottom of the cleaning blade, the installation head and the T-shaped groove are embedded with each other, fastening bolts are movably and penetratively arranged at both ends of the installation head, the fastening bolts pass through the T-shaped groove and are in contact with the outer walls of both sides of the cleaning blade, and the cleaning blade is made of polyurethane ceramic composite material.
[0006] According to the above technical scheme, an annular sleeve is fixedly sleeved on the outer wall of the blade mounting rod, one end of the annular sleeve is connected with a hydraulic support, a push rod is fixedly connected to one side of the hydraulic support, a hydraulic cylinder is installed on one side of the fixed seat, a telescopic rod is connected to the output end of the hydraulic cylinder, and one end of the telescopic rod is connected with the push rod.
[0007] According to the above technical solution, the bottom of the annular sleeve is connected to a lower edge plate, and the outer wall of the telescopic rod is fitted with a spring, with the two ends of the spring contacting the hydraulic cylinder and the lower edge plate respectively.
[0008] According to the above technical solution, the conveying roller has a hollow structure and a hot air pump is connected through it at one end. Several through holes are evenly arranged on the side wall of the conveying roller. Hollow screws are rotatably connected to the inner wall of the conveying roller. There are two hollow screws, and a connecting block is connected between the two hollow screws. An air inlet is provided on the connecting block.
[0009] According to the above technical solution, the threads on the two hollow screws are in opposite directions, a movable baffle is threadedly connected to the outer wall of the hollow screw, a driven gear is sleeved on one end of the hollow screw, a driving gear is meshed on one side of the driven gear, an output shaft is sleeved inside the driving gear, and a motor is connected to one end of the output shaft.
[0010] According to the above technical solution, guide blocks are installed on both sides of the movable baffle, and guide grooves are opened on the inner wall of the conveying roller. The outer wall of the guide block slides in contact with the inner wall of the guide groove.
[0011] According to the above technical solution, a shaping shell is provided on one side of the fixed seat, the conveyor belt passes through the shaping shell, an inner groove is opened on the inner wall of the shaping shell, a shaping seat is installed between the upper and lower inner walls of the inner groove, an adjusting component is slidably installed inside the shaping seat, a pressure plate is connected to one end of the adjusting component, a pressing block is rotatably provided on the inner wall of the pressure plate, and the outer wall of the conveyor belt is in contact with the pressing block.
[0012] According to the above technical solution, a connecting rod is installed on the side wall of the pressure plate, and a lateral pressing slider is slidably sleeved on the outer wall of the connecting rod. One end of the lateral pressing slider is connected to a side forming block, the side forming block is in contact with the edge of the conveyor belt, and an elastic element is provided between the side forming block and the end of the connecting rod.
[0013] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the blade of the present invention is made of polyurethane-ceramic composite material, which has both wear resistance and elasticity, reducing belt surface wear; an adaptive clamping system is adopted, which automatically adjusts the scraper pressure through hydraulic or pneumatic pressure to adapt to belt surface fluctuations, such as when joints pass through; and warm / dry air is discharged through perforations to the inside, which can accelerate the evaporation of moisture on the belt surface, making the return idler cleaner and preventing the conveyor belt from slipping. Attached Figure Description
[0014] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall modular structure of the present invention; Figure 2 This is a schematic diagram of the cleaning blade installation of the present invention; Figure 3 This is a structural diagram of the internal structure of the shaping shell of the present invention; Figure 4 This is a schematic diagram of the conveyor roller structure of the present invention; Figure 5 This is a schematic diagram of the internal structure of the conveying roller of the present invention; Figure 6 This is a schematic diagram of the installation of the movable baffle of the present invention; 1. Conveyor belt; 2. Fixed seat; 3. Hot air pump; 31. Sliding sealing sleeve; 41. Shaping housing; 42. Shaping seat; 43. Adjusting component; 44. Pressure plate; 45. Pressing block; 46. Side forming stop block; 47. Connecting rod; 48. Lateral pressing slider; 411. Inner groove; 52. Conveying roller; 521. Through hole; 53. Hollow screw; 54. Connecting block; 541. Air inlet; 55. Movable baffle; 56. Motor; 57. Driven gear; 58. Drive gear; 59. Output shaft; 551. Guide block; 522. Guide groove; 6. Cleaning blade; 61. Blade mounting rod; 62. Hydraulic support; 63. Toggle lever; 64. Hydraulic cylinder; 641. Telescopic rod; 642. Spring; 65. T-slot; 66. Fastening bolt; 67. Mounting head; 68. Annular sleeve; 681. Lower edge plate. Detailed Implementation
[0015] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0016] Please see Figures 1-6This invention provides a technical solution: a foreign object prevention device at the tail end of a belt conveyor in a coal preparation plant, comprising a conveyor belt 1, a fixed seat 2 on one side of the conveyor belt 1, a conveyor roller 52 rotatably mounted on the side wall of the fixed seat 2, the outer wall of the conveyor roller 52 contacting the conveyor belt 1, a blade mounting rod 61 rotatably mounted on one side of the fixed seat 2, an mounting head 67 connected to the top of the blade mounting rod 61, a cleaning blade 6 on the top of the mounting head 67, the cleaning blade 6 contacting the conveyor belt 1, a T-slot 65 at the bottom of the cleaning blade 6, the mounting head 67 and the T-slot 65 fitting together, and fastening bolts 66 movably passing through both ends of the mounting head 67, the fastening bolts 66 passing through the T-slot 65. The groove 65 is in contact with the outer walls of the two sides of the cleaning blade 6. The cleaning blade 6 is made of polyurethane ceramic composite material. The conveyor roller 52 rotates with the belt surface on the fixed seat 2, so that the conveyor belt 1 forms a stable support at the tail. The blade mounting rod 61 coaxially supports the cleaning blade 6. The blade 6 is quickly positioned and anti-lateral slippage is achieved by the dovetail engagement of the mounting head 67 and the T-groove 65. The fastening bolt 66 passes through the T-groove 65 to clamp the end of the blade 6 to prevent crawling. The blade edge is in contact with the conveyor belt 1 at a constant incident angle to continuously scrape off the adhering material on the return stroke. The blade edge of polyurethane ceramic composite material provides a high-hardness micro-cutting surface while maintaining elasticity, thereby improving cleaning efficiency without damaging the belt. An annular sleeve 68 is fixedly sleeved on the outer wall of the blade mounting rod 61. One end of the annular sleeve 68 is connected to a hydraulic support 62. A lever 63 is fixedly connected to one side of the hydraulic support 62. A hydraulic cylinder 64 is installed on one side of the fixed seat 2. The output end of the hydraulic cylinder 64 is connected to a telescopic rod 641. One end of the telescopic rod 641 is connected to the lever 63. The annular sleeve 68 couples the blade mounting rod 61 with the loading mechanism. The hydraulic cylinder 64 drives the telescopic rod 641 to push and pull the lever 63, so that the hydraulic support 62 applies an adjustable preload and angle torque to the annular sleeve 68, thereby automatically compensating for blade 6 wear and strip thickness fluctuations, and making concessions when passing through joints or hard blocks, and then restoring the set scraping pressure. The bottom of the annular sleeve 68 is connected to a lower edge plate 681, and a spring 642 is sleeved on the outer wall of the telescopic rod 641. The two ends of the spring 642 are in contact with the hydraulic cylinder 64 and the lower edge plate 681, respectively. The lower edge plate 681 is fixedly connected to the annular sleeve 68. The spring 642 on the outside of the telescopic rod 641 provides secondary elastic energy storage and buffering on the basis of hydraulic loading. When the load changes suddenly, the spring 642 first compresses to absorb the impact, and then elastically recovers to maintain the constant contact between the blade 6 and the conveyor belt 1, reducing the frequency of fine adjustment of the hydraulic system and suppressing vibration. The conveyor roller 52 has a hollow structure, and a hot air pump 3 is connected to one end. Several through holes 521 are evenly arranged on the side wall of the conveyor roller 52. Hollow screws 53 are rotatably connected to the inner wall of the conveyor roller 52. There are two hollow screws 53, and a connecting block 54 is connected between the two hollow screws 53. An air inlet 541 is opened on the connecting block 54. The hot air pump 3 sends hot air into the hollow conveyor roller 52 through the air inlet 541 of the connecting block 54. The airflow is distributed along the roller cavity and evenly leaks out to the inner side of the conveyor belt 1 through the through holes 521, forming interface drying and pressure relief, destroying water film adsorption and promoting unloading and peeling. When the hollow screws 53 rotate inside the roller, they also serve as the flow channel skeleton and installation reference, so that the airflow is evenly guided in the axial direction, improving the drying and self-cleaning effect of the belt surface. The two hollow screws 53 have opposite threads. The outer wall of the hollow screws 53 is threaded with a movable baffle 55. One end of the hollow screw 53 is fitted with a driven gear 57. One side of the driven gear 57 is meshed with a driving gear 58. The inside of the driving gear 58 is fitted with an output shaft 59. One end of the output shaft 59 is connected to a motor 56. The two hollow screws 53 have opposite threads. The motor 56 drives the driving gear 58 and the driven gear 57 through the output shaft 59, so that the movable baffles 55 on both sides move synchronously in opposite directions or in opposite directions along the threads. The baffles 55 change the coverage ratio of the effective drainage area and the through hole 521 in the roller cavity, so as to realize the dynamic distribution of the hot air leakage and the working width, so as to adapt to the cleaning needs of different material viscosity and bandwidth position. Guide blocks 551 are installed on both sides of the movable baffle 55, and guide grooves 522 are opened on the inner wall of the conveying roller 52. The outer wall of the guide block 551 slides in contact with the inner wall of the guide groove 522. The guide blocks 551 on both sides of the movable baffle 55 and the guide grooves 522 on the inner wall of the conveying roller 52 form a linear sliding guide pair, which restricts the baffle 55 to only make axial linear movement and prevents rotation and sway. With the help of the threaded push, repeatable and vibration-resistant positioning accuracy can be obtained, thereby ensuring that the opening area of the through hole 521 is accurately covered. A shaping housing 41 is provided on one side of the fixed base 2. The conveyor belt 1 passes through the shaping housing 41. An inner groove 411 is opened on the inner wall of the shaping housing 41. A shaping seat 42 is installed between the upper and lower inner walls of the inner groove 411. An adjusting component 43 is slidably installed inside the shaping seat 42. One end of the adjusting component 43 is connected to a pressure plate 44. A pressing block 45 is rotatably provided on the inner wall of the pressure plate 44. The outer wall of the conveyor belt 1 contacts the pressing block 45. The conveyor belt 1 passes through the inner groove 411 of the shaping housing 41. The shaping seat 42 serves as an upper and lower opposing base for installing the adjusting component 43. The adjusting component 43 drives the pressure plate 44 to make slight displacement and angle correction, so that the pressing block 45 fits the material side of the conveyor belt 1 in a rolling or small swing manner, thereby achieving shaping and stable support for the flatness and thickness fluctuation of the belt surface. At the same time, it provides secondary cleaning and guidance at the tail end to suppress edge arching and wrinkling. A connecting rod 47 is installed on the side wall of the pressure plate 44. A lateral pressing slider 48 is slidably sleeved on the outer wall of the connecting rod 47. One end of the lateral pressing slider 48 is connected to a side forming block 46. The side forming block 46 contacts the edge of the conveyor belt 1. An elastic element is provided between the side forming block 46 and the end of the connecting rod 47. The connecting rod 47 links the pressure plate 44 with the lateral mechanism. The lateral pressing slider 48 slides along the connecting rod 47 to adjust and follow the position of the belt edge. Under the constant force of the elastic element, the side forming block 46 lightly presses the edge of the conveyor belt 1, applies flexible limit to the deviation trend and shapes the edge R angle. At the same time, it guides the removed edge fines into the collection channel in the housing to prevent them from entering the tail gap and causing jamming and foreign objects from being rolled in.
[0017] Hot air drying and depressurization prevent the formation of a water film on the belt surface, reduce slippage, and accelerate peeling. The scraper material combines rigidity and toughness, enabling efficient removal of thin adhesive layers under low surface pressure while being belt-friendly and having a long service life. Adaptive loading and elastic buffering maintain constant force adhesion and low vibration and noise during belt thickness fluctuations and joint impacts, reducing manual readjustment and downtime. The hot air action zone can be adjusted to achieve targeted and intensified cleaning at different viscosities and bandwidths, improving energy efficiency. Belt surface shaping suppresses arching and wrinkling, reduces the probability of deviation, and stabilizes material posture. Edge treatment collects fine materials in a directional manner to prevent them from entering the tail gap and causing jamming. Overall, it achieves a closed-loop synergy between de-adhesive drying and fine scraping cleaning.
[0018] The blades of this invention are made of polyurethane-ceramic composite material, which combines wear resistance and elasticity, reducing belt surface wear; an adaptive clamping system is adopted, which automatically adjusts the scraper pressure through hydraulic or pneumatic pressure to adapt to belt surface fluctuations, such as when joints pass through; warm / dry air is discharged through perforations to the inside, which can accelerate the evaporation of moisture on the belt surface, making the return idler cleaner and preventing the conveyor belt from slipping.
[0019] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0020] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A device for preventing foreign objects from entering the tail of a belt conveyor in a coal preparation plant, characterized in that: The device includes a conveyor belt (1), a fixed seat (2) is provided on one side of the conveyor belt (1), a conveyor roller (52) is rotatably installed on the side wall of the fixed seat (2), the outer wall of the conveyor roller (52) is in contact with the conveyor belt (1), a blade mounting rod (61) is rotatably installed on one side of the fixed seat (2), a mounting head (67) is connected to the top of the blade mounting rod (61), a cleaning blade (6) is provided on the top of the mounting head (67), the cleaning blade (6) is in contact with the conveyor belt (1), a T-slot (65) is provided at the bottom of the cleaning blade (6), the mounting head (67) and the T-slot (65) are fitted together, fastening bolts (66) are movably provided through both ends of the mounting head (67), the fastening bolts (66) pass through the T-slot (65) and both ends are in contact with the outer walls of both sides of the cleaning blade (6), and the cleaning blade (6) is made of polyurethane ceramic composite material.
2. The anti-foreign object device at the tail end of a belt conveyor in a coal preparation plant according to claim 1, characterized in that: The outer wall of the blade mounting rod (61) is fixedly fitted with an annular sleeve (68), one end of the annular sleeve (68) is connected to a hydraulic support (62), one side of the hydraulic support (62) is fixedly connected to a lever (63), one side of the fixed seat (2) is fitted with a hydraulic cylinder (64), the output end of the hydraulic cylinder (64) is connected to a telescopic rod (641), one end of the telescopic rod (641) is connected to the lever (63).
3. The anti-foreign object device at the tail end of a belt conveyor in a coal preparation plant according to claim 2, characterized in that: The bottom of the annular sleeve (68) is connected to a lower edge plate (681), and a spring (642) is sleeved on the outer wall of the telescopic rod (641). The two ends of the spring (642) are in contact with the hydraulic cylinder (64) and the lower edge plate (681) respectively.
4. The anti-foreign object device at the tail end of a belt conveyor in a coal preparation plant according to claim 3, characterized in that: The conveying roller (52) has a hollow structure and a hot air pump (3) is connected through it at one end. Several through holes (521) are evenly arranged on the side wall of the conveying roller (52). A hollow screw (53) is rotatably connected to the inner wall of the conveying roller (52). There are two hollow screws (53), and a connecting block (54) is connected between the two hollow screws (53). An air inlet (541) is opened on the connecting block (54).
5. The anti-foreign object device at the tail end of a belt conveyor in a coal preparation plant according to claim 4, characterized in that: The two hollow screws (53) have opposite threads. The outer wall of the hollow screw (53) is threaded with a movable baffle (55). One end of the hollow screw (53) is fitted with a driven gear (57). One side of the driven gear (57) is meshed with a driving gear (58). The inside of the driving gear (58) is fitted with an output shaft (59). One end of the output shaft (59) is connected to a motor (56).
6. The anti-foreign object device at the tail end of a belt conveyor in a coal preparation plant according to claim 5, characterized in that: Guide blocks (551) are installed on both sides of the movable baffle (55), and guide grooves (522) are opened on the inner wall of the conveying roller (52). The outer wall of the guide block (551) slides in contact with the inner wall of the guide groove (522).
7. A foreign object prevention device for the tail end of a belt conveyor in a coal preparation plant according to claim 6, characterized in that: A shaping housing (41) is provided on one side of the fixed seat (2). The conveyor belt (1) passes through the shaping housing (41). An inner groove (411) is provided on the inner wall of the shaping housing (41). A shaping seat (42) is installed between the upper and lower inner walls of the inner groove (411). An adjusting component (43) is slidably installed inside the shaping seat (42). A pressure plate (44) is connected to one end of the adjusting component (43). A pressing block (45) is rotatably provided on the inner wall of the pressure plate (44). The outer wall of the conveyor belt (1) is in contact with the pressing block (45).
8. A foreign object prevention device for the tail end of a belt conveyor in a coal preparation plant according to claim 7, characterized in that: A connecting rod (47) is installed on the side wall of the pressure plate (44). A lateral pressing slider (48) is slidably sleeved on the outer wall of the connecting rod (47). One end of the lateral pressing slider (48) is connected to a side forming block (46). The side forming block (46) contacts the edge of the conveyor belt (1). An elastic element is provided between the side forming block (46) and the end of the connecting rod (47).