Elastic top belt device for tubular belt conveyor

Abstract

This invention discloses an elastic top belt device for a tubular belt conveyor, relating to the field of conveyors. It includes a frame, an integrated frame on the frame surface, and top belt rollers evenly distributed on the integrated frame surface. The outer wall of the frame is equipped with a lifting mechanism for pre-adjusting the position of the integrated frame according to different conveyor belt specifications. An elastic buffer mechanism for cushioning the pressure on the conveyor belt is provided between the integrated frame and the lifting frame. The front end of the integrated frame is equipped with a cleaning mechanism for cleaning the bottom outer wall of the conveyor belt. This invention integrates multiple sets of top belt rollers into a single integrated frame, using factory prefabrication and requiring no on-site debugging and installation. The height is adjusted via the lifting mechanism, and the elastic buffer mechanism provides flexible cushioning to suppress belt sagging, shaking, and deviation. The adjustment components synchronously adapt to the pre-tension, and the cleaning mechanism automatically removes impurities. This solves the problems of rigidity without buffering and cumbersome debugging in existing devices, improving stability and lifespan.

Description

Technical Field

[0001] This invention relates to the field of conveyor technology, specifically to an elastic top belt device for a tubular belt conveyor. Background Technology

[0002] In the field of bulk material conveying, tubular belt conveyors are widely used in industries such as mining, agricultural product processing, and ports due to their outstanding advantages such as closed conveying, dust prevention and environmental protection, strong adaptability to spatial turning, and low material loss. They can realize long-distance, continuous, and green transportation of materials such as ores, coal, grains, fruits and vegetables. Their closed tubular structure can effectively suppress dust diffusion, significantly improve the on-site working environment, and meet stringent environmental protection and safety production requirements. Among them, the top belt device, as a key component of the no-load transition section and forming section of the tubular belt conveyor, mainly undertakes the core role of lifting the conveyor belt upward, preventing excessive belt sagging, ensuring the smooth winding and forming of the belt, and maintaining the stability of the tubular profile. Its structural performance directly determines the smoothness of belt operation, service life, and overall conveying efficiency.

[0003] The top belt devices that are currently used with tubular belt conveyors generally adopt a rigid fixed structure, which is composed of multiple sets of independent top belt rollers, idler beams and connecting supports. The top belt rollers are directly and rigidly installed on the beams to support the bottom of the conveyor belt in a fixed posture and at a fixed height. Although this type of structure can achieve the basic lifting function and has strong component versatility and low manufacturing cost, it has been used to a certain extent in conventional working conditions and small and medium-sized conveying systems. However, under complex working conditions such as heavy-load impact in mines and continuous and efficient conveying of agricultural products, it has exposed a number of insurmountable technical defects and can no longer meet the development needs of high-end, long-life and low-maintenance equipment.

[0004] However, existing tubular belt conveyor top belt devices are mostly rigid and fixed, with no buffering or adjustment capabilities. They directly bear the concentrated sag load caused by the weight of the conveyor belt itself and material residue. Continuous friction with the high-speed belt leads to rapid wear of the cast rubber surface. They cannot adaptively adjust to changes in belt sag and load, nor can they effectively buffer and disperse vibration and impact. They are prone to instantaneous impacts when the belt tension fluctuates, deviates, or passes through transition sections, exacerbating belt vibration, twisting, and deviation, significantly increasing maintenance costs, and affecting continuous operations in mining, agricultural product processing, and other industries. Therefore, further improvements are needed. Summary of the Invention

[0005] The purpose of this invention is to provide an elastic top belt device for a tubular belt conveyor to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an elastic top belt device for a tubular belt conveyor, comprising a frame, an integrated frame on the surface of the frame, and top belt rollers evenly distributed on the surface of the integrated frame; a lifting mechanism on the outer wall of the frame for preset adjustment of the position of the integrated frame according to different specifications of conveyor belts; the lifting mechanism includes a lifting slide rail fixedly installed on the outer wall of the frame, a lifting frame slidably installed on the inner wall of the lifting slide rail, and a lifting screw rotatably installed at the bottom of the lifting frame; a lifting worm gear installed at the bottom of the lifting slide rail via a bearing, and the lifting screw threadedly connected to the lifting worm gear; an elastic buffering mechanism for buffering the pressure of the conveyor belt is provided between the integrated frame and the lifting frame; and a cleaning mechanism for cleaning the bottom outer wall of the conveyor belt is provided at the front end of the integrated frame.

[0007] Preferably, the lifting slide rails are arranged in an array of four groups, and the lifting slide rails are arranged perpendicular to the conveyor belt. The lifting frame and the integrated frame are arranged in parallel, and the lifting frame is arranged symmetrically in two groups.

[0008] Preferably, the lifting mechanism further includes a drive worm gear mounted on the bottom of the frame via bearings, and the drive worm gear meshes with a lifting worm wheel. Two sets of drive worm gears are symmetrically arranged. A transmission rod is mounted on the outer wall of the frame via bearings, and the transmission rod is perpendicular to the drive worm gear. A bevel gear set is provided between the transmission rod and the drive worm gear. A servo motor is fixedly mounted on the outer wall of the frame, and a helical gear set is provided between the output end of the servo motor and the transmission rod.

[0009] Preferably, the elastic buffer mechanism includes a first damping shock absorber fixedly installed between the integrated frame and the lifting frame, and the first damping shock absorber is arranged in an array of four groups. The outer wall of the lifting frame is provided with a buffer groove, and the inner wall of the buffer groove is provided with a buffer spring. A buffer slider is slidably installed inside the buffer groove, and a connecting rod is hinged to the top of the buffer slider. The outer wall of the lifting frame is provided with a first adjustment component for adjusting the preload of the first damping shock absorber and the buffer spring according to different specifications of conveyor belts.

[0010] Preferably, the buffer groove is symmetrically opened on the outer wall of the lifting frame, one end of the buffer spring abuts against the end of the buffer groove, and the other end of the buffer spring abuts against the side wall of the buffer slider, and the end of the connecting rod away from the buffer slider is hinged to the bottom of the integrated frame.

[0011] Preferably, the first adjustment component includes an adjustment cylinder rotatably mounted on the outer wall of the bottom end of the first damping shock absorber, a first adjustment block threaded onto the outer wall of the adjustment cylinder, a driven adjustment gear fixedly mounted at the bottom end of the adjustment cylinder, an active adjustment gear mounted on the end of the lifting frame via a bearing, the active adjustment gear meshing with the driven adjustment gear, an adjustment screw rotatably mounted on the inner wall of the buffer slide, a second adjustment block threaded onto the outer wall of the adjustment screw, a bevel gear set provided between the adjustment screw and the active adjustment gear, a drive gear fixedly mounted on the outer wall of the adjustment screw, and a drive rack fixedly mounted on the side wall of the frame, the drive gear meshing with the drive rack.

[0012] Preferably, the top of the first adjusting block abuts against the bottom end of the spring of the first damping shock absorber, and the first adjusting block is slidably connected to the base of the first damping shock absorber; the second adjusting block is slidably connected to the inner wall of the buffer groove, and the side wall of the second adjusting block abuts against the end of the buffer spring away from the adjusting slider; the driving rack is arranged parallel to the lifting direction of the lifting frame.

[0013] Preferably, the cleaning mechanism includes a mounting frame fixedly installed at the end of the lifting frame, and a rotating shaft is mounted on the surface of the mounting frame via a bearing, and a swing frame is fixedly installed at the end of the rotating shaft. A cleaning scraper is mounted on the top of the swing frame via a torsion spring. A second damping shock absorber is fixedly installed on the surface of the mounting frame, and a roller is provided at the top of the second damping shock absorber. A drive motor is fixedly installed on the surface of the mounting frame, and a reciprocating lead screw is provided at the output end of the drive motor. A moving rack is threaded on the outer wall of the reciprocating lead screw. A rocking gear is provided on the outer wall of the rotating shaft, and the rocking gear meshes with the moving rack. A second adjustment component is provided at the bottom of the mounting frame for adjusting the preload of the second damping shock absorber.

[0014] Preferably, the cleaning scraper is L-shaped, with its end in contact with the bottom outer wall of the conveyor belt, and the outer wall of the cleaning scraper away from the conveyor belt abutting against the outer wall of the roller.

[0015] Preferably, the second adjustment component includes a third adjustment block slidably mounted on the bottom end of the second damping shock absorber. A helical rod is fixedly mounted on the end of the frame, and a helical sleeve is threadedly connected to the outer wall of the helical rod. An adjustment sleeve is threadedly connected to the outer wall of the helical sleeve. The adjustment sleeve is slidably connected to the mounting frame, and the top end of the adjustment sleeve is fixedly connected to the bottom of the third adjustment block. The helical rod and the third adjustment block are arranged perpendicularly. The preload of the second damping shock absorber is adjusted synchronously by adjusting the lifting frame.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by setting up an elastic buffer mechanism, achieves dual flexible buffering of damping and spring when the conveyor belt is subjected to load fluctuations and vibration impacts. It adaptively matches load changes and disperses impact stress, effectively suppressing belt shaking, twisting and deviation. It solves the problems of easy wear, lack of buffering and easy damage to the conveyor belt of traditional rigid top belt rollers, extends the service life of top belt rollers and conveyor belts, and ensures continuous and stable operation of equipment.

[0017] 2. This invention forms an integrated linkage adjustment structure by setting up a lifting mechanism and a first adjustment component. It can automatically adjust the height of the top belt roller according to different specifications of conveyor belts, and simultaneously match the preload of the first damping shock absorber and the buffer spring to achieve adaptive adjustment of height and elasticity. No manual adjustment is required, which improves the device's adaptability to conveyor belts of different pipe diameters and different loads, and expands the scope of application of the equipment.

[0018] 3. This invention, by setting up an automatic cleaning mechanism and a second adjustment component, continuously scrapes and cleans the bottom of the conveyor belt simultaneously during the operation of the conveyor, removing material residue and dust, reducing wear on the conveyor belt and top roller, and automatically adapting the cleaning pressure according to the height adjustment, taking into account both cleaning effect and buffer protection, avoiding rigid scraping damage to the conveyor belt, keeping the conveyor belt running clean, reducing the frequency of equipment maintenance, and achieving long-term stable and maintenance-free operation.

[0019] 4. This invention integrates and fixes multiple sets of top belt rollers into an integrated frame, forming a prefabricated, precisely positioned, and hoisted and fixed module that requires no debugging. This solves the problems of dispersed structure, poor roller positioning consistency, and cumbersome on-site installation and debugging in traditional rigid top belt devices, greatly improving assembly efficiency, ensuring uniform and stable support for the conveyor belt top support, and reducing the risk of belt sagging, shaking, and deviation from a structural level. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the elastic buffer mechanism structure of the present invention; Figure 3 This is a schematic diagram of the lifting mechanism structure of the present invention; Figure 4 This is a schematic diagram of the structure of the first adjustment component of the present invention; Figure 5 For the present invention Figure 4 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the structure of the adjusting cylinder and the first adjusting block of the present invention; Figure 7 This is a schematic diagram of the cleaning mechanism structure of the present invention; Figure 8 This is a schematic diagram of the swing frame, movable rack and swing gear structure of the present invention; Figure 9 This is a schematic diagram of the structure of the second adjustment component of the present invention.

[0021] In the diagram: 1. Frame; 2. Integrated frame; 21. Top roller; 3. Lifting frame; 31. Lifting slide rail; 32. Lifting screw; 33. Lifting worm gear; 34. Drive worm; 35. Transmission rod; 36. Servo motor; 4. First damping shock absorber; 5. Buffer slide; 51. Buffer spring; 52. Buffer slider; 53. Connecting rod; 6. Adjusting cylinder; 61. First adjusting block; 62. Driven adjusting gear; 63. Active adjusting gear; 64. Adjusting screw; 65. Second adjusting block; 66. Drive gear; 67. Drive rack; 7. Mounting frame; 71. Rotating shaft; 72. Swing frame; 73. Cleaning scraper; 8. Second damping shock absorber; 81. Roller; 9. Drive motor; 91. Reciprocating screw; 92. Moving rack; 93. Swing gear; 10. Third adjusting block; 101. Helical rod; 102. Helical sleeve; 103. Adjusting sleeve. Detailed Implementation

[0022] 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.

[0023] Please see Figures 1-9 The present invention provides the following technical solution: an elastic top belt device for a tubular belt conveyor, comprising a frame 1, an integrated frame 2 on the surface of the frame 1, and top belt rollers 21 evenly distributed on the surface of the integrated frame 2, a lifting mechanism on the outer wall of the frame 1 for preset adjustment of the position of the integrated frame 2 according to different specifications of conveyor belts, an elastic buffer mechanism for buffering the pressure of the conveyor belt between the integrated frame 2 and the lifting frame 3, and a cleaning mechanism for cleaning the bottom outer wall of the conveyor belt at the front end of the integrated frame 2.

[0024] In one embodiment of the present invention, the lifting mechanism includes a lifting slide rail 31 fixedly installed on the outer wall of the frame 1, a lifting frame 3 slidably installed on the inner wall of the lifting slide rail 31, and a lifting screw 32 rotatably installed at the bottom of the lifting frame 3. A lifting worm gear 33 is installed at the bottom of the lifting slide rail 31 via a bearing, and the lifting screw 32 is threadedly connected to the lifting worm gear 33. The lifting mechanism also includes a drive worm 34 installed at the bottom of the frame 1 via a bearing, and the drive worm 34 meshes with the lifting worm gear 33. Two sets of symmetrically arranged components are provided. A transmission rod 35 is installed on the outer wall of the frame 1 through a bearing. The transmission rod 35 is perpendicular to the drive worm gear 34, and a bevel gear set is provided between the transmission rod 35 and the drive worm gear 34. A servo motor 36 is fixedly installed on the outer wall of the frame 1, and a helical gear set is provided between the output end of the servo motor 36 and the transmission rod 35. Four sets of lifting slide rails 31 are arranged in an array, and the lifting slide rails 31 are perpendicular to the conveyor belt. The lifting frame 3 is parallel to the integrated frame 2, and two sets of lifting frames 3 are symmetrically arranged. When it is necessary to adapt to conveyor belts of different diameters and weights, the servo motor 36 is started, which drives the transmission rod 35 to rotate through the helical gear set. The transmission rod 35 drives the worm gear 34 to rotate synchronously through the bevel gear set. The worm gear 34 meshes with the lifting worm wheel 33 to drive the lifting screw 32 to rotate, so that the lifting frame 3 can be smoothly raised and lowered along the lifting slide rail 31. This allows for precise adjustment of the height of the integrated frame 2 and the top belt roller 21 to meet the top support requirements of conveyor belts of different specifications.

[0025] In one embodiment of the present invention, the elastic buffer mechanism includes a first damping shock absorber 4 fixedly installed between the integrated frame 2 and the lifting frame 3, and the first damping shock absorber 4 is arranged in an array of four groups. The outer wall of the lifting frame 3 is provided with a buffer groove 5, and the inner wall of the buffer groove 5 is provided with a buffer spring 51. A buffer slider 52 is slidably installed inside the buffer groove 5, and a connecting rod 53 is hinged to the top of the buffer slider 52. The buffer groove 5 is symmetrically opened on the outer wall of the lifting frame 3. One end of the buffer spring 51 abuts against the end of the buffer groove 5, and the other end of the buffer spring 51 abuts against the side wall of the buffer slider 52. The end of the connecting rod 53 away from the buffer slider 52 is hinged to the bottom of the integrated frame 2. The outer wall of the lifting frame 3 is provided with a first adjustment component for adjusting the preload of the first damping shock absorber 4 and the buffer spring 51 according to different specifications of conveyor belts. During normal operation, the conveyor belt runs smoothly along the conveying direction. The top roller 21 continuously supports the bottom of the conveyor belt, effectively suppressing belt sagging and ensuring stable tubular formation and smooth operation. When the conveyor belt vibrates and experiences load changes due to its own weight, material residue, tension fluctuations, or deviation, the top roller 21 is forced to cause the integrated frame 2 to float. The first damping shock absorber 4 is compressed, providing a first-level flexible buffer for the instantaneous impact. At the same time, the integrated frame 2 presses down the connecting rod 53, pushing the buffer slider 52 to slide directionally along the buffer groove 5 and compressing the buffer spring 51. The elastic deformation of the buffer spring 51 achieves a second-level energy absorption buffer. The double buffer structure effectively disperses the load, reduces vibration, and avoids rigid collisions that could cause conveyor belt wear, twisting, or deviation.

[0026] In one embodiment of the present invention, the first adjustment assembly includes an adjustment cylinder 6 rotatably mounted on the outer wall of the bottom end of the first damping shock absorber 4, a first adjustment block 61 threadedly mounted on the outer wall of the adjustment cylinder 6, and a driven adjustment gear 62 fixedly mounted on the bottom end of the adjustment cylinder 6. An active adjustment gear 63 is mounted on the end of the lifting frame 3 via a bearing, and the active adjustment gear 63 meshes with the driven adjustment gear 62. An adjustment screw 64 is rotatably mounted on the inner wall of the buffer slide 5, and a second adjustment block 65 is threadedly mounted on the outer wall of the adjustment screw 64. The adjustment screw 64 and the active adjustment gear 63 are connected... The machine is equipped with a bevel gear set, a drive gear 66 is fixedly installed on the outer wall of the adjusting screw 64, and a drive rack 67 is fixedly installed on the side wall of the frame 1. The drive gear 66 and the drive rack 67 are meshed and connected. The top of the first adjusting block 61 abuts against the bottom end of the spring of the first damping shock absorber 4, and the first adjusting block 61 is slidably connected to the base of the first damping shock absorber 4. The second adjusting block 65 is slidably connected to the inner wall of the buffer slide 5, and the side wall of the second adjusting block 65 abuts against the end of the buffer spring 51 away from the buffer slider 52. The drive rack 67 is parallel to the lifting direction of the lifting frame 3. During the lifting process of the lifting frame 3, the first adjustment component operates synchronously. The drive gear 66 meshes with the drive rack 67 fixed on the frame 1 and rotates, driving the adjustment screw 64 to rotate synchronously. On one hand, the adjustment cylinder 6 is driven to rotate through the bevel gear set, the active adjustment gear 63, and the driven adjustment gear 62, causing the first adjustment block 61 to slide along the base of the first damping shock absorber 4, precisely adjusting the spring preload of the first damping shock absorber 4. On the other hand, the second adjustment block 65 is driven to slide directionally in the buffer groove 5, changing the initial compression of the buffer spring 51, and synchronously completing the matching adjustment of the buffer elasticity, realizing the adaptive adjustment of the thicker and heavier conveyor belt with the stronger elastic preload.

[0027] In one embodiment of the present invention, the cleaning mechanism includes a mounting frame 7 fixedly installed at the end of the lifting frame 3, and a rotating shaft 71 is mounted on the surface of the mounting frame 7 via a bearing, and a swing frame 72 is fixedly installed at the end of the rotating shaft 71. A cleaning scraper 73 is mounted on the top of the swing frame 72 by a torsion spring. The cleaning scraper 73 is L-shaped, and the end of the cleaning scraper 73 contacts the bottom outer wall of the conveyor belt. A second damping shock absorber 8 is fixedly installed on the surface of the mounting frame 7, and a roller 81 is provided at the top of the second damping shock absorber 8. The outer wall of the cleaning scraper 73 away from the conveyor belt abuts against the outer wall of the roller 81. A drive motor 9 is fixedly installed on the surface of the mounting frame 7, and a reciprocating screw 91 is provided at the output end of the drive motor 9. A moving rack 92 is threaded on the outer wall of the reciprocating screw 91. A rocking gear 93 is provided on the outer wall of the rotating shaft 71, and the rocking gear 93 meshes with the moving rack 92. A second adjustment component is provided at the bottom of the mounting frame 7 for adjusting the preload of the second damping shock absorber 8. During the operation of the conveyor, the cleaning mechanism is put into operation simultaneously. The drive motor 9 is energized to drive the reciprocating screw 91 to rotate, which drives the moving rack 92 to make linear reciprocating motion along the axial direction. The moving rack 92 meshes with the swing gear 93 to drive the rotating shaft 71 to make periodic reciprocating swing. The cleaning scraper 73 is always in close contact with the roller 81 under the action of the torsion spring. Under the elastic support of the second damping shock absorber 8, the end of the cleaning scraper 73 is in close contact with the bottom outer wall of the conveyor belt, and continuously scrapes and cleans the attached dust, material residue and other impurities. At the same time, the second damping shock absorber 8 buffers the impact and vibration during the cleaning process to avoid the rigid scraping of the cleaning scraper 73 and damage to the conveyor belt.

[0028] In one embodiment of the present invention, the second adjustment assembly includes a third adjustment block 10 slidably mounted on the bottom end of the second damping shock absorber 8, a spiral rod 101 fixedly mounted on the end of the frame 1, a spiral sleeve 102 threadedly connected to the outer wall of the spiral rod 101, and an adjustment sleeve 103 threadedly connected to the outer wall of the spiral sleeve 102. The adjustment sleeve 103 is slidably connected to the mounting frame 7, and the top end of the adjustment sleeve 103 is fixedly connected to the bottom of the third adjustment block 10. The spiral rod 101 and the third adjustment block 10 are arranged perpendicularly. The preload of the second damping shock absorber 8 is adjusted synchronously by adjusting the lifting frame 3. While the lifting frame 3 adjusts its height, the second adjustment component moves in sync. The adjustment sleeve 103 moves synchronously with the lifting frame 3, causing the spiral sleeve 102 to move up and down along the spiral rod 101 and rotate. The rotation of the spiral sleeve 102 drives the adjustment sleeve 103 to rise or fall relative to the mounting frame 7, thereby lifting or lowering the third adjustment block 10. This automatically completes the synchronous adjustment of the preload of the second damping shock absorber 8, ensuring that the cleaning scraper 73 always adheres tightly to the outer wall of the conveyor belt with appropriate pressure, balancing cleaning effect and buffer protection. The entire process achieves integrated linkage of height adjustment, elastic buffer preload, and cleaning pressure adjustment, without the need for manual adjustment. It is highly adaptable and operates stably and reliably.

[0029] Working principle: The elastic top belt device for tubular belt conveyors adopts a construction method of factory prefabrication and on-site overall installation. Multiple sets of top belt rollers 21 are pre-installed and rigidly fixed on an integrated frame 2. Before leaving the factory, the height, elastic pretension force and other parameters are accurately preset according to the specifications and dimensions of the target conveyor belt, forming an integrated, adjustment-free top support functional module. The relative positions and working parameters of all components are calibrated during the manufacturing stage. On-site, only the frame 1 needs to be fixed on the foundation of the conveyor line to put it into operation, eliminating the tedious process of adjusting the position, height and pretension force of each set of top belt rollers 21 on-site, ensuring the consistency of conveyor belt top support and the overall rigidity of the equipment. When the equipment is working normally, the unloaded conveyor belt runs along the conveying direction. The top roller 21 continuously lifts the conveyor belt upward, effectively suppressing excessive belt sagging and ensuring that the belt is smoothly curled and formed, maintaining the stability of the tubular profile. When the conveyor belt vibrates and sags due to its own weight, material residue, tension fluctuations, or deviation impact, the top roller 21 is driven by the impact force to cause the integrated frame 2 to float slightly in sync. At this time, the first damping shock absorber 4 arranged in the array is compressed first, providing a first-level flexible buffer for the instantaneous impact. At the same time, the connecting rod 53 hinged at the bottom of the integrated frame 2 pushes the buffer slider 52 to slide directionally along the buffer groove 5, squeezing the buffer spring 51 in the buffer groove 5 to store and absorb energy, realizing a second-level elastic buffer. Through the dual action of damping and spring buffering, the vibration impact is effectively dispersed, rigid collisions are avoided, and the risk of belt shaking, twisting, and deviation is greatly reduced, ensuring the continuous and stable operation of the conveyor belt. During the operation of the conveyor, the cleaning mechanism starts working simultaneously. The drive motor 9 is energized to drive the reciprocating screw 91 to rotate, which drives the moving rack 92 to make linear reciprocating motion along the axial direction. The moving rack 92 meshes with the swing gear 93 to drive the rotating shaft 71 to make periodic reciprocating swing. The cleaning scraper 73 is always in close contact with the roller 81 under the action of the torsion spring. Under the elastic support of the second damping shock absorber 8, the end of the cleaning scraper 73 is in close contact with the bottom outer wall of the conveyor belt, and the attached dust, material residue and other impurities are continuously scraped and cleaned. At the same time, the second damping shock absorber 8 can buffer the impact and vibration generated during the cleaning process, and avoid the rigid scraping of the cleaning scraper 73 to damage the conveyor belt, so as to achieve the dual functions of cleaning and protection. When it is necessary to adapt to conveyor belts of different diameters and weights, the servo motor 36 is started, which drives the transmission rod 35 to rotate through the helical gear set. The transmission rod 35 drives two sets of drive worm gears 34 to rotate synchronously through the bevel gear set. The drive worm gears 34 mesh with the lifting worm wheel 33 to drive the lifting screw 32 to rotate, so that the lifting frame 3 can be raised and lowered smoothly along the lifting slide rail 31, thereby accurately adjusting the height of the integrated frame 2 and the top belt roller 21 to adapt to the top support requirements of different specifications of conveyor belts. During the lifting process of the lifting frame 3, the first adjustment component is linked synchronously. The drive gear 66 meshes with the drive rack 67 fixed on the frame 1 to rotate, driving the adjustment screw 64 to rotate. On the one hand, the adjustment cylinder 6 is driven to rotate through the bevel gear set, the active adjustment gear 63, and the driven adjustment gear 62, which drives the first adjustment block 61 to move up and down, accurately adjusting the spring preload of the first damping shock absorber 4; on the other hand, it drives the second adjustment block 6 to rotate. 5. Slides within the buffer chute 5, changing the compression of the buffer spring 51 and synchronously adjusting the buffer elasticity to achieve adaptive matching for thicker and heavier conveyor belts with stronger elastic pretension. Simultaneously, the lifting action of the lifting frame 3 is linked to the operation of the second adjustment component. The adjustment sleeve 103 moves synchronously with the lifting frame 3, driving the spiral sleeve 102 to move up and down along the spiral rod 101 and generate rotation. The rotation of the spiral sleeve 102 drives the adjustment sleeve 103 to rise and fall relative to each other, thereby lifting or lowering the third adjustment block 10, realizing synchronous adjustment of the pretension of the second damping shock absorber 8, ensuring that the cleaning scraper 73 always adheres to the outer wall of the conveyor belt with appropriate pressure, taking into account both cleaning effect and buffer protection. The entire process realizes the integrated linkage of height adjustment, elastic buffer pretension, and cleaning pressure adjustment, without the need for separate manual debugging. It has strong adaptability and stable operation, and can meet the continuous and efficient conveying needs under complex working conditions such as mining and agricultural product processing.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An elastic top belt device for a tubular belt conveyor, comprising a frame (1), wherein an integrated frame (2) is provided on the surface of the frame (1), and top belt rollers (21) are provided on the surface of the integrated frame (2) at equal intervals, characterized in that: The outer wall of the frame (1) is provided with a lifting mechanism for preset adjustment of the position of the integrated frame (2) according to different specifications of conveyor belts. The lifting mechanism includes a lifting slide rail (31) fixedly installed on the outer wall of the frame (1), and a lifting frame (3) is slidably installed on the inner wall of the lifting slide rail (31). A lifting screw (32) is rotatably installed at the bottom of the lifting frame (3). A lifting worm wheel (33) is installed at the bottom of the lifting slide rail (31) through a bearing. The lifting screw (32) is threadedly connected to the lifting worm wheel (33). An elastic buffer mechanism for buffering the pressure of the conveyor belt is provided between the integrated frame (2) and the lifting frame (3). A cleaning mechanism for cleaning the bottom outer wall of the conveyor belt is provided at the front end of the integrated frame (2).

2. The elastic top belt device for a tubular belt conveyor according to claim 1, characterized in that: The lifting slide rails (31) are arranged in an array of four groups, and the lifting slide rails (31) are perpendicular to the conveyor belt. The lifting frame (3) is parallel to the integrated frame (2), and the lifting frame (3) is symmetrically arranged in two groups.

3. The elastic top belt device for a tubular belt conveyor according to claim 1, characterized in that: The lifting mechanism also includes a drive worm (34) mounted on the bottom of the frame (1) via bearings, and the drive worm (34) meshes with the lifting worm wheel (33). Two sets of drive worms (34) are symmetrically arranged. A transmission rod (35) is mounted on the outer wall of the frame (1) via bearings. The transmission rod (35) is perpendicular to the drive worm (34). A bevel gear set is provided between the transmission rod (35) and the drive worm (34). A servo motor (36) is fixedly mounted on the outer wall of the frame (1). A helical gear set is provided between the output end of the servo motor (36) and the transmission rod (35).

4. The elastic top belt device for a tubular belt conveyor according to claim 1, characterized in that: The elastic buffer mechanism includes a first damping shock absorber (4) fixedly installed between the integrated frame (2) and the lifting frame (3), and the first damping shock absorber (4) is arranged in an array of four groups. The outer wall of the lifting frame (3) is provided with a buffer groove (5), and the inner wall of the buffer groove (5) is provided with a buffer spring (51). A buffer slider (52) is slidably installed inside the buffer groove (5), and a connecting rod (53) is hinged to the top of the buffer slider (52). The outer wall of the lifting frame (3) is provided with a first adjustment component for adjusting the preload of the first damping shock absorber (4) and the buffer spring (51) according to different specifications of conveyor belts.

5. The elastic top belt device for a tubular belt conveyor according to claim 4, characterized in that: The buffer groove (5) is symmetrically opened on the outer wall of the lifting frame (3). One end of the buffer spring (51) abuts against the end of the buffer groove (5), and the other end of the buffer spring (51) abuts against the side wall of the buffer slider (52). The end of the connecting rod (53) away from the buffer slider (52) is hinged to the bottom of the integrated frame (2).

6. The elastic top belt device for a tubular belt conveyor according to claim 4, characterized in that: The first adjustment assembly includes an adjustment cylinder (6) rotatably mounted on the outer wall of the bottom end of the first damping shock absorber (4), and a first adjustment block (61) threadedly mounted on the outer wall of the adjustment cylinder (6), and a driven adjustment gear (62) fixedly mounted on the bottom end of the adjustment cylinder (6). An active adjustment gear (63) is mounted on the end of the lifting frame (3) through a bearing, and the active adjustment gear (63) meshes with the driven adjustment gear (62). An adjustment screw (64) is rotatably mounted on the inner wall of the buffer slide (5), and a second adjustment block (65) is threadedly mounted on the outer wall of the adjustment screw (64). A bevel gear set is provided between the adjustment screw (64) and the active adjustment gear (63). A drive gear (66) is fixedly mounted on the outer wall of the adjustment screw (64), and a drive rack (67) is fixedly mounted on the side wall of the frame (1), and the drive gear (66) meshes with the drive rack (67).

7. The elastic top belt device for a tubular belt conveyor according to claim 6, characterized in that: The top of the first adjusting block (61) abuts against the bottom of the spring of the first damping shock absorber (4), and the first adjusting block (61) is slidably connected to the base of the first damping shock absorber (4). The second adjusting block (65) is slidably connected to the inner wall of the buffer groove (5), and the side wall of the second adjusting block (65) abuts against the end of the buffer spring (51) away from the adjusting slider. The driving rack (67) is parallel to the lifting direction of the lifting frame (3).

8. The elastic top belt device for a tubular belt conveyor according to claim 1, characterized in that: The cleaning mechanism includes a mounting frame (7) fixedly installed at the end of the lifting frame (3), and a rotating shaft (71) is mounted on the surface of the mounting frame (7) via a bearing, and a swing frame (72) is fixedly installed at the end of the rotating shaft (71), and a cleaning scraper (73) is mounted on the top of the swing frame (72) via a torsion spring. A second damping shock absorber (8) is fixedly installed on the surface of the mounting frame (7), and a roller (81) is provided at the top of the second damping shock absorber (8). A drive motor (9) is fixedly installed on the surface of the mounting frame (7), and a reciprocating screw (91) is provided at the output end of the drive motor (9), and a moving rack (92) is threaded on the outer wall of the reciprocating screw (91). A rocking gear (93) is provided on the outer wall of the rotating shaft (71), and the rocking gear (93) meshes with the moving rack (92). A second adjustment component is provided at the bottom of the mounting frame (7) for adjusting the preload of the second damping shock absorber (8).

9. The elastic top belt device for a tubular belt conveyor according to claim 8, characterized in that: The cleaning scraper (73) is L-shaped, and the end of the cleaning scraper (73) is in contact with the bottom outer wall of the conveyor belt, and the outer wall of the cleaning scraper (73) away from the conveyor belt is in contact with the outer wall of the roller (81).

10. The elastic top belt device for a tubular belt conveyor according to claim 8, characterized in that: The second adjustment component includes a third adjustment block (10) that is slidably installed at the bottom of the second damping shock absorber (8). A spiral rod (101) is fixedly installed at the end of the frame (1), and a spiral sleeve (102) is threadedly connected to the outer wall of the spiral rod (101). An adjustment sleeve (103) is threadedly connected to the outer wall of the spiral sleeve (102). The adjustment sleeve (103) is slidably connected to the mounting frame (7), and the top of the adjustment sleeve (103) is fixedly connected to the bottom of the third adjustment block (10). The spiral rod (101) and the third adjustment block (10) are arranged vertically. The preload of the second damping shock absorber (8) is adjusted synchronously by adjusting the lifting frame (3).

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