Multi-roller group supporting tubular belt conveyor

Abstract

The utility model relates to conveying machinery technical field discloses multi roller group supports tubular belt conveyor, including support frame, support plate, carrier roller and dust scraping subassembly, carrier roller is connected on support plate through pivot rotation, pivot both ends are connected with support plate through buffer assembly, buffer assembly includes U -shaped groove, round groove and spacing groove on support plate, the support column with spacing block is connected to pivot bottom end, the support column and round groove slide fit, spacing block and spacing groove slide fit and through spring elasticity abuts, and this structure makes carrier roller to be able to float buffering along perpendicular direction, absorbs impact load, simultaneously, dust scraping subassembly contains the scraping strip that extends to carrier roller front side and is attached with the belt. The utility model realizes the flexible support of carrier roller through buffer assembly, effectively solves the bumping and wear problem caused by rigid impact, and removes the dust of belt through dust scraping subassembly, prevents carrier roller from slipping, and remarkably improves conveying stability and equipment life.

Description

Technical Field

[0001] This utility model relates to the field of conveying machinery technology, and in particular to a multi-roller supported tubular belt conveyor. Background Technology

[0002] Tubular belt conveyors are widely used in industries such as coal, mining, power, and ports for conveying bulk materials due to their closed conveying, environmentally friendly and pollution-free characteristics, as well as their ability to achieve small-radius turns. In order to roll the flat conveyor belt into a cylindrical shape and maintain its shape, existing tubular belt conveyors usually use multiple sets of idlers arranged in a hexagonal or triangular pattern to forcibly wrap and support the belt. In order to ensure the rigidity of the support, the shafts of these idler sets are usually directly fixed to a rigid support frame or support, and their positions are relatively fixed and cannot be adjusted.

[0003] However, in actual long-distance conveying processes, this rigid, fixed support structure has significant structural drawbacks. When the metal joint of the tubular belt passes through the idler area, or when the instantaneous flow rate of the conveyed material fluctuates or large pieces of material appear, a violent, hard impact occurs instantaneously between the belt and the idler because the rigidly fixed idler cannot yield or buffer in the radial direction. This long-term rigid collision not only causes continuous bumps and vibrations during the conveying process, severely affecting the stability of material transport, but also accelerates the wear and peeling of the rubber covering on the belt surface, and may even cause the idler bearings to be damaged due to excessive impact load, increasing equipment maintenance costs and downtime risks.

[0004] Therefore, this utility model proposes a multi-roller supported tubular belt conveyor to overcome the shortcomings of the prior art. Utility Model Content

[0005] In existing technologies, multi-roller supported tubular belt conveyors generally use rigid fixed idlers for support. During the conveying process, especially when the belt joint passes or the load changes abruptly, radial buffering is not possible, which easily leads to hard impacts, severe bumps, and accelerated belt wear. In addition, dust adhering to the belt surface can easily cause the idlers to slip. This utility model aims to provide a multi-roller supported tubular belt conveyor with an improved structure that can achieve flexible buffering and automatic cleaning functions, effectively solving the above problems.

[0006] This utility model provides a multi-roller supported tubular belt conveyor, including a support frame, a support plate fixedly connected to the inner side wall of the support frame, rollers rotatably connected to the support plate via a rotating shaft, and a dust scraper assembly fixedly connected to the side wall of the support frame. Both ends of the rotating shaft are connected to the support plate via a buffer assembly, which provides vertical floating capability. Specifically, the buffer assembly includes a U-shaped groove on the top surface of the support plate, a support column fixedly connected to the bottom end of the rotating shaft, and a spring disposed inside the U-shaped groove. A circular groove extends vertically downwards from the bottom surface of the U-shaped groove, and a limiting groove with a diameter larger than the diameter of the circular groove is further formed at the bottom end of the inner wall of the circular groove. A limiting block is fixedly connected to the bottom end of the support column, the support column is slidably inserted into the circular groove, and the limiting block is slidably fitted into the limiting groove. The spring is accommodated in the limiting groove, and both ends of the spring abut against the bottom surface of the limiting block and the bottom of the limiting groove, respectively, to form an elastic buffer structure. The dust scraping assembly includes a scraper blade extending to the front side of the idler roller, the scraper blade slidingly contacting the outer surface of the idler roller.

[0007] Preferably, the diameter of the support column is equal to the aperture of the circular groove, and the diameter of the limiting block is adapted to the inner diameter of the limiting groove to ensure the guiding accuracy of the sliding. Furthermore, a buffer gap is formed between the outer wall of the rotating shaft and the inner wall of the U-shaped groove. This gap provides necessary clearance for the rotating shaft when it is pressed and sinks, preventing rigid collisions.

[0008] Preferably, the dust scraper assembly further includes a connecting frame and a positioning plate. One end of the connecting frame is fixedly connected to the scraper blade, and the other end of the connecting frame is fixedly connected to the positioning plate. The positioning plate is used to achieve the fixed installation of the entire assembly.

[0009] Preferably, the positioning plate has a circular hole in the middle, the support plate and the positioning plate are stacked on top of each other, and the stud passes through the circular hole and the support plate in sequence before being threaded onto the side wall of the support frame. This stacking and fixing method simplifies the connection structure and uses a single fastener to lock two functional components simultaneously.

[0010] Preferably, the connecting frame has a U-shaped curved structure, with the middle part of the connecting frame bent downwards to avoid the rotation trajectory of the idler roller, and the two ends of the connecting frame are respectively connected to the scraper and the positioning plate. This special curved shape ensures that the scraper can pass over the idler roller body and accurately reach the cleaning position before the belt contacts the idler roller.

[0011] Preferably, the scraper has an arc-shaped structure, and the radius of curvature of the inner arc surface of the scraper is consistent with the outer diameter of the tubular belt supported by the idler roller, thereby ensuring a good fit between the scraper and the belt surface and improving the dust removal efficiency.

[0012] Preferably, the depth of the limiting groove is greater than the height of the limiting block, providing sufficient sliding stroke for the limiting block. When the spring is compressed, the limiting block abuts against the top limiting surface of the limiting groove under the action of the spring, eliminating initial gaps and maintaining the stability of the component position through preload.

[0013] Preferably, the number of idlers is three, and the three idlers are distributed in an equilateral triangle in the internal space of the support frame. Each idler is equipped with a support plate and a buffer assembly at both ends, thereby forming a closed tubular conveying channel.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model solves the problem that existing rigid support structures are prone to hard impacts and severe jolts when the belt joint passes or the load changes suddenly by setting a buffer assembly containing a spring, support column and limiting fit structure between the idler roller shaft and the support plate. It achieves the technical effect that the idler roller can flexibly float and avoid changes in load pressure in the vertical direction, effectively absorbs and buffers radial impact energy, significantly reduces the vibration of the belt during operation, thereby reducing belt wear and extending the service life of the tubular belt and idler roller assembly.

[0016] 2. This utility model solves the problem that dust adhering to the belt surface easily accumulates on the idler surface, causing slippage or belt deviation, by setting a dust scraping component extending to the front side of the idler on the side wall of the support frame, and the shape of the scraper is adapted to the outer diameter of the belt. It achieves the technical effect of removing surface adhering materials in time before the belt enters the idler support area, ensuring the cleanliness of the contact surface between the belt and the idler, maintaining a stable friction driving force, and improving the operational stability of the conveying system.

[0017] 3. This utility model solves the problem of lateral displacement or detachment of the rotating shaft while it has a buffering function by using a multi-level groove design inside the tray and the sliding cooperation between the limiting block and the limiting groove. It achieves the technical effect of both flexible up and down buffering and accurate horizontal positioning and prevention of component detachment. At the same time, the positioning plate of the dust scraper assembly and the tray are fixed by a common stud, which further simplifies the mechanical structure and facilitates on-site installation and later maintenance. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the multi-roller supported tubular belt conveyor proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the idler rollers supporting the multi-roller tubular belt conveyor proposed in this utility model;

[0020] Figure 3 This is a schematic diagram of the buffer assembly of the multi-roller support tubular belt conveyor proposed in this utility model;

[0021] Figure 4 This is a schematic diagram of the dust scraping assembly of the multi-roller support tubular belt conveyor proposed in this utility model.

[0022] Legend:

[0023] 1. Support frame; 2. Idler roller; 3. Rotating shaft; 4. Pallet; 5. Stud; 6. Buffer assembly; 601. U-shaped groove; 602. Circular groove; 603. Limiting groove; 604. Support column; 605. Spring; 606. Limiting block; 7. Dust scraper assembly; 701. Scraper strip; 702. Connecting frame; 703. Positioning plate; 704. Circular hole. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] Example:

[0026] Please refer to Figures 1 to 4 This utility model provides a multi-roller supported tubular belt conveyor, which aims to solve the problems in the prior art where tubular belt conveyors mostly use rigid support, which leads to easy bumps and accelerated belt wear when the belt passes through joints or changes in load, and the material dust adhering to the belt surface can easily cause the idler roller 2 to slip.

[0027] like Figure 1 and Figure 2 As shown, the multi-roller support tubular belt conveyor includes a support frame 1 and a support plate 4 fixedly connected to the inner wall of the support frame 1. The support frame 1 serves as the basic mounting carrier for the entire device, bearing the overall load and providing installation space. The support plate 4 supports the idler rollers 2 and transmits the reaction force. The idler rollers 2 are rotatably connected to the support plate 4 via a rotating shaft 3. The idler rollers 2 are used to contact the tubular belt and provide rolling friction support. The two ends of the rotating shaft 3 are respectively connected to the support plate 4 via a buffer assembly 6. The buffer assembly 6 is used to provide flexible buffer stroke in the vertical direction to absorb impact force. A dust scraper assembly 7 is also fixedly connected to the side wall of the support frame 1. The dust scraper assembly 7 is used to remove the adhering substances on the belt surface before the belt contacts the idler rollers 2.

[0028] like Figure 3 As shown, the specific structure of the buffer assembly 6 is set at the connection between the tray 4 and the rotating shaft 3. The buffer assembly 6 includes a U-shaped groove 601 opened on the top surface of the tray 4, a support column 604 fixedly connected to the bottom end of the rotating shaft 3, and a spring 605 set in the inner area of ​​the U-shaped groove 601. The bottom surface of the U-shaped groove 601 extends downward in the vertical direction to form a circular groove 602. The bottom end of the inner wall of the circular groove 602 is further provided with a limiting groove 603 with a diameter larger than the hole diameter of the circular groove 602, thereby forming a multi-level stepped cavity structure inside the tray 4 to accommodate the moving parts.

[0029] A limiting block 606 is fixedly connected to the bottom end of the support column 604. The support column 604 is slidably inserted into the circular groove 602. The inner wall of the circular groove 602 guides the support column 604 and restricts its horizontal displacement. The limiting block 606 is slidably fitted into the limiting groove 603. The diameter of the limiting block 606 is adapted to the inner diameter of the limiting groove 603 to ensure the smoothness of sliding. The spring 605 is accommodated in the limiting groove 603, and the two ends of the spring 605 abut against the bottom surface of the limiting block 606 and the bottom of the limiting groove 603, respectively, to form an elastic buffer structure. This structure allows the rotating shaft 3 to generate displacement by compressing the spring 605 through the support column 604 after being subjected to force.

[0030] To solve the aforementioned technical problems, the internal multi-stage cooperative structure of the buffer component 6 and the front-mounted layout of the dust scraper component 7 achieve flexible support and cleaning protection functions during the tubular belt conveyor process. Please refer to the following for details. Figure 3 and Figure 4 The core structure will be described in detail below:

[0031] like Figure 3 As shown, to achieve precise guidance and buffering effects, the diameter of the support column 604 is designed to be equal to the diameter of the circular groove 602, so that the support column 604 can maintain a vertical posture when it moves up and down in the circular groove 602, avoiding tilting or jamming. The diameter of the limiting block 606 is matched with the inner diameter of the limiting groove 603, ensuring that the limiting block 606 can rise and reset smoothly when subjected to the reaction force of the spring 605. At the same time, the outer wall of the rotating shaft 3 and the inner wall of the U-shaped groove 601 are not completely fitted, but are designed to form a buffer gap. This buffer gap provides necessary travel space for the rotating shaft 3 to sink downward when subjected to heavy load or impact, preventing the rotating shaft 3 from rigidly colliding with the support plate 4.

[0032] Furthermore, the depth of the limiting groove 603 is designed to be greater than the height of the limiting block 606. This depth difference directly determines the maximum effective stroke of the buffer assembly 6. After installation, the spring 605 is in a compressed state, and its preload pushes the limiting block 606 upward, so that under no external load, the limiting block 606 presses against the top limiting surface of the limiting groove 603, thereby keeping the rotating shaft 3 in the initial high position. When the belt conveyor passes the idler roller 2, the load pressure is transmitted to the support column 604 through the rotating shaft 3, overcoming the elasticity of the spring 605 and causing the overall structure to sink, thereby absorbing the impact energy.

[0033] like Figure 4 As shown, a dust scraper assembly 7 is also fixedly installed on the side wall of the support frame 1. The dust scraper assembly 7 extends to the front of the idler roller 2 through a specific structure. Specifically, the dust scraper assembly 7 includes a scraper 701, a connecting frame 702 and a positioning plate 703. One end of the connecting frame 702 is fixedly connected to the scraper 701, and the other end of the connecting frame 702 is fixedly connected to the positioning plate 703. The positioning plate 703 serves as the mounting base for the entire dust scraper assembly 7, and a circular hole 704 is provided in its middle.

[0034] During assembly, the pallet 4 and the positioning plate 703 are installed on the side wall of the support frame 1 in a stacked manner. The stud 5 passes through the round hole 704 and the pallet 4 in sequence and is then threaded onto the side wall of the support frame 1. This shared fastener design not only simplifies the number of openings on the side wall of the support frame 1, but also enhances the relative positional stability of the dust scraper assembly 7 and the idler roller 2 support structure.

[0035] The connecting frame 702 has a U-shaped curved structure, with its middle part bent downwards to avoid the rotation trajectory of the idler roller 2. The two ends of the connecting frame 702 are respectively connected to the scraper 701 and the positioning plate 703. This curved structure allows the scraper 701 to bypass the idler roller 2 and its rotating shaft 3 and be suspended in front of the idler roller 2. The scraper 701 has an arc-shaped structure, and the radius of curvature of its inner arc surface is consistent with the outer diameter of the tubular belt supported by the idler roller 2, ensuring that the scraper 701 can closely fit the surface of the belt and effectively scrape off the attached substances.

[0036] Regarding the overall layout of the idler roller 2, in this embodiment, there are three idler rollers 2. The three idler rollers 2 are distributed in an equilateral triangle in the internal space of the support frame 1, and each idler roller 2 is equipped with a support plate 4 and a buffer assembly 6 at both ends, thereby forming a closed circular conveying channel to provide all-round support and wrapping for the tubular belt.

[0037] Based on the above embodiments, the present invention may further include the following preferred technical solutions:

[0038] As a preferred embodiment, to ensure the reliability of the buffer assembly 6 under long-term high-frequency vibration environment and to prevent component detachment, please refer to... Figure 3The depth of the limiting groove 603 is specifically designed to be greater than the height of the limiting block 606. This dimensional relationship not only provides sufficient vertical floating space for the limiting block 606, but also reserves space for the spring 605. After assembly, the spring 605 is always in a compressed state. Even when the idler roller 2 is not under belt load, the spring 605 still applies an upward preload to the limiting block 606, so that the limiting block 606 is tightly against the stop structure above the limiting groove 603, thereby eliminating the fit gap and preventing abnormal noise or loosening during operation.

[0039] As another preferred embodiment, to ensure that the rotating shaft 3 does not experience rigid impact during the sinking and buffering process, please refer to... Figure 1 and Figure 3 A buffer gap is reserved between the outer wall of the rotating shaft 3 and the inner wall of the U-shaped groove 601. The height of the buffer gap needs to be calculated and set so that it is less than the remaining travel space at the bottom of the limiting groove 603. This ensures that under extreme loads, the buffer limit is mainly achieved by the spring 605 pressing down or the limiting block 606 touching the bottom to achieve a soft stop, rather than the rotating shaft 3 directly hitting the support plate 4 and causing hard damage.

[0040] As a further preferred embodiment, in order to achieve efficient integrated installation of the dust scraper assembly 7 and the idler roller 2 support structure, please refer to... Figure 2 and Figure 4 The positioning plate 703 has a circular hole 704 in the middle. The positioning plate 703 and the support plate 4 are not installed independently, but are stacked. A single stud 5 passes through the circular hole 704 and the corresponding mounting hole on the support plate 4 in sequence, and is finally threaded to the side wall of the support frame 1. This structural design not only reduces the number of fasteners, but also uses the locking force of the stud 5 to simultaneously position and fix the support plate 4 and the dust scraper assembly 7, simplifying the assembly and maintenance process of the equipment.

[0041] In another preferred embodiment, to prevent the support structure of the dust scraper assembly 7 from interfering with the normal rotation of the idler roller 2, the connecting frame 702 is specially designed as a U-shaped curved structure, such as... Figure 4 As shown, after the connecting frame 702 extends from the positioning plate 703, its middle part bends downward and sinks significantly, thus bypassing the cylindrical space envelope required for the rotation of the idler roller 2. Then it extends upward again to connect the scraper 701. This irregular structure ensures that the scraper 701 can be accurately delivered to the belt contact area directly in front of the idler roller 2, while the connecting frame 702 body will not interfere with or collide with the rotating idler roller 2.

[0042] As a final preferred embodiment, in order to maximize cleaning efficiency and reduce damage to the belt, the scraper 701 is designed with an arc-shaped structure. The radius of curvature of its inner arc surface is strictly matched with the theoretical outer diameter of the tubular belt supported by the idler roller 2. This shape adaptation allows the scraper 701 to form line contact or surface contact with the belt surface, rather than point contact, thereby ensuring the scraping effect while evenly distributing the scraping pressure and extending the service life of the scraper 701 and the belt.

[0043] The working principle of this multi-roller supported tubular belt conveyor is as follows:

[0044] When the tubular belt conveyor starts and begins to transport materials, the tubular belt moves forward under the action of traction. Its outer surface first contacts the dust scraper assembly 7 located in front of the idler roller 2. Since the scraper bar 701 has an arc-shaped structure that matches the outer diameter of the belt and is in close contact with the belt surface, as the tubular belt moves forward, the material dust adhering to its surface continues to contact the scraper bar 701 of the dust scraper assembly 7. The scraper bar 701 uses physical scraping action to remove the dust from its surface, keeping the tubular belt clean before entering the support area of ​​the idler roller 2, thereby effectively avoiding the problem of idler roller 2 slippage or abnormal belt wear caused by dust accumulation.

[0045] Subsequently, the cleaned tubular belt enters the support area of ​​the idler roller 2. The belt drives the idler roller 2 to rotate around the shaft 3 through friction. When the belt joint passes over the idler roller 2, or when the amount of material being conveyed suddenly increases, causing the belt load to increase, the vertical pressure on the idler roller 2 increases instantaneously and transmits the load to the shaft 3, which then acts on the support column 604 connected below the shaft 3.

[0046] At this time, the support column 604 is pressed and drives the bottom limiting block 606 to sink and slide downward along the circular groove 602 and the limiting groove 603. During the sliding process, the limiting block 606 presses the spring 605 downward, causing the spring 605 to undergo elastic deformation and generate an upward reaction force. This reaction force forms a flexible buffer damping, absorbing and consuming the impact energy transmitted by the belt. At the same time, the rotating shaft 3 slides downward along the U-shaped groove 601 with the support column 604, using the reserved buffer gap to achieve floating avoidance.

[0047] Through the aforementioned series of linked actions, the buffer component 6 enables the idler roller 2 to provide flexible floating support for the tubular belt, effectively mitigating hard impacts and solving the problems of belt wear and material jolting caused by traditional rigid support. This results in smoother operation of the tubular belt and smoother material conveying.

[0048] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A multi-roller support tubular belt conveyor, comprising a support frame (1), a pallet (4) fixedly connected to the inner side wall of the support frame (1), a roller (2) rotatably connected to the pallet (4) via a rotating shaft (3), and a dust scraper assembly (7) fixedly connected to the side wall of the support frame (1); Its features are, The two ends of the rotating shaft (3) are respectively connected to the tray (4) through the buffer assembly (6); The buffer assembly (6) includes a U-shaped groove (601) opened on the top surface of the tray (4), a support column (604) fixedly connected to the bottom end of the rotating shaft (3), and a spring (605) disposed inside the U-shaped groove (601); The bottom surface of the U-shaped groove (601) extends downward in the vertical direction to form a circular groove (602), and the bottom end of the inner wall of the circular groove (602) is further provided with a limiting groove (603) with a diameter larger than the diameter of the circular groove (602). The bottom end of the support column (604) is fixedly connected to a limiting block (606), the support column (604) is slidably inserted into the circular groove (602), and the limiting block (606) is slidably fitted into the limiting groove (603). The spring (605) is housed in the limiting groove (603), and the two ends of the spring (605) abut against the bottom surface of the limiting block (606) and the bottom of the limiting groove (603) respectively to form an elastic buffer structure. The dust scraper assembly (7) includes a scraper (701) extending to the front side of the idler roller (2), the scraper (701) slidingly contacting the outer surface of the idler roller (2).

2. The multi-roller supported tubular belt conveyor according to claim 1, characterized in that, The diameter of the support column (604) is equal to the diameter of the circular groove (602), the diameter of the limiting block (606) is adapted to the inner diameter of the limiting groove (603), and a buffer gap is formed between the outer wall of the rotating shaft (3) and the inner wall of the U-shaped groove (601).

3. The multi-roller supported tubular belt conveyor according to claim 1, characterized in that, The dust scraper assembly (7) also includes a connecting frame (702) and a positioning plate (703). One end of the connecting frame (702) is fixedly connected to the scraper blade (701), and the other end of the connecting frame (702) is fixedly connected to the positioning plate (703).

4. The multi-roller supported tubular belt conveyor according to claim 3, characterized in that, The positioning plate (703) has a round hole (704) in the middle. The support plate (4) is stacked with the positioning plate (703), and the stud (5) passes through the round hole (704) and the support plate (4) in sequence and is then threaded to the side wall of the support frame (1).

5. The multi-roller supported tubular belt conveyor according to claim 3, characterized in that, The connecting frame (702) has a U-shaped curved structure. The middle part of the connecting frame (702) is bent downward to avoid the rotation trajectory of the idler roller (2). The two ends of the connecting frame (702) are respectively connected to the scraper (701) and the positioning plate (703).

6. The multi-roller supported tubular belt conveyor according to claim 1, characterized in that, The scraper (701) has an arc-shaped structure, and the radius of curvature of the inner arc surface of the scraper (701) is consistent with the outer diameter of the tubular belt supported by the idler roller (2).

7. The multi-roller supported tubular belt conveyor according to claim 1, characterized in that, The depth of the limiting groove (603) is greater than the height of the limiting block (606), the spring (605) is in a compressed state, and the limiting block (606) is pressed against the top limiting surface of the limiting groove (603) under the action of the spring (605).

8. The multi-roller supported tubular belt conveyor according to claim 1, characterized in that, The number of the idler rollers (2) is three. The three idler rollers (2) are distributed in an equilateral triangle in the internal space of the support frame (1), and each idler roller (2) is provided with a support plate (4) and a buffer assembly (6) at both ends.

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