A belt deviation correcting device

Abstract

The utility model discloses a kind of belt deviation rectifying devices, belong to belt conveying technical field, including the transmission gear (5) on the transmission shaft of the tail drum two sides of installation in the rear end of rack and the passive gear (6) meshed with it, two passive gears (6) are respectively fixedly connected with the deviation rectifying plate (8) of the round plate shape corresponding to the edge of belt (4), the lower part of the deviation rectifying plate (8) corresponds with belt, the linear velocity of the rotation of deviation rectifying plate (8) and belt corresponding place is similar with the linear velocity of the rotation of belt.The utility model structure is simple, can effectively solve the deflection problem of belt at tail, improve transportation efficiency while effectively avoiding the occurrence of belt scratch, tearing and other risks, greatly reduce the time of shutdown maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of belt conveyor technology, specifically relating to a belt correction device. Background Technology

[0002] Belt conveyors, as important material handling equipment, are widely used in industries such as metallurgy, power, and coal mining. Existing belt conveyors mainly consist of a frame, a head roller driven by a drive mechanism at the front of the frame, a tail roller at the rear of the frame, and a belt fitted onto the head and tail rollers. A roller assembly is typically installed between the head and tail rollers, positioned in the middle of the belt. The head and tail rollers are mounted on a drive shaft, which is rotatably connected to bearing seats located on the inner walls of the frame at both ends. During belt conveying, uneven material distribution, roller wear, and belt aging can easily lead to uneven belt tension, causing belt misalignment (belt slippage). This is especially true at the tail roller, where it generally lacks direct power and is passively driven by the belt. When material is added to the belt, it is easily compressed and misaligned, making belt slippage more likely during rotation. Tail belt misalignment not only affects conveying efficiency but can also lead to serious consequences such as belt abrasion and tearing.

[0003] To address the issue of belt misalignment at the tail end of the machine, various technical solutions have been proposed, such as adjusting the idler roller spacing, optimizing belt tension, and employing automatic belt alignment devices. However, these methods still have certain limitations in practical applications. For example, adjusting the idler roller spacing requires machine downtime, affecting production efficiency; optimizing belt tension may lead to increased energy consumption; and automatic belt alignment devices are costly and require significant maintenance.

[0004] Therefore, there is a need for a belt alignment device that is simple in structure, requires no machine downtime, and can effectively solve the problem of belt misalignment at the tail end of the machine. Utility Model Content

[0005] The purpose of this invention is to provide a belt alignment device with a simple structure that can effectively solve the problem of belt misalignment at the tail end of the machine without stopping the machine, thereby improving transportation efficiency and effectively avoiding risks such as belt breakage.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A belt alignment device includes a drive shaft mounted on the inner wall of the frame on both sides of the frame and mounted on the tail roller at the rear end of the frame. Drive gears are respectively arranged on both sides of the tail roller on the drive shaft, and driven gears are respectively arranged on the drive gears to mesh with the drive gears. The two driven gears are respectively fixedly connected to the circular plate-shaped alignment plates corresponding to the edge of the belt.

[0007] A further improvement of this utility model is that: the transmission gear and the driven gear are both matching spur gears, wherein the driven gear is rotatably connected to the inner side of the frame through a rotating shaft and a bearing seat; the correction plate is fixedly installed on the side of the driven gear opposite to the belt.

[0008] A further improvement of the above-mentioned technical solution of this utility model is that the correction plate is connected to the end of the rotating shaft by a connecting rod or to the end face of the driven gear by at least three connecting rods.

[0009] A further improvement of the above-mentioned technical solution of this utility model is that: the connecting rod is a countersunk bolt with an inner wrench hole, the side of the straightening plate opposite to the belt is provided with a countersunk stepped hole, the countersunk bolt passes through the countersunk stepped hole and is threaded into the center hole of the rotating shaft or the threaded hole on the end face or the threaded hole on the rim of the driven gear, and two nuts are provided on the threaded section of the connecting rod, one nut at the outer end is used to fix the straightening plate and the connecting rod, and the other nut at the inner end is used to adjust the extension length of the connecting rod.

[0010] A further improvement of this utility model is that the lower part of the correction plate corresponds to the belt.

[0011] A further improvement of this utility model is that the linear velocity of the rotation of the correction plate and the belt at the corresponding points is similar to the linear velocity of the belt rotation.

[0012] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows: This utility model belt correction device has a simple structure and can automatically correct belt deviation in real time during operation. It can effectively solve the problem of belt deviation at the tail end of the machine without stopping the machine, improve transportation efficiency, and effectively avoid the risk of belt breakage.

[0013] This invention installs a correction plate on each side of the tail roller. The correction plate is driven by the drive shaft of the tail roller and can move together with the tail roller and the belt. It can limit and correct the belt that is prone to deviating at the tail roller. The correction plate is opposite to the belt at the tail roller and can prevent the belt from deviating on the tail roller.

[0014] The transmission gear and driven gear of this invention are matching spur gears, both mounted on the inner side of the frame. The alignment plate is also mounted on the side of the driven gear opposite to the belt. The structure is simple and allows for synchronous rotation with the belt. The lower part of the alignment plate, as defined in this invention, corresponds to the belt, ensuring that the rotation direction of the alignment plate at its contact point is the same as the belt's rotation direction. Furthermore, by limiting the linear velocity of the alignment plate and belt at their contact point to be similar to the linear velocity of the belt, there is almost no relative movement between the alignment plate and the belt rotating in the same direction. This significantly reduces friction between the alignment plate and the belt, preventing mutual damage, while simultaneously limiting the belt's lateral deviation (i.e., oscillation perpendicular to the belt's rotation direction).

[0015] The alignment plate of this invention can be installed in at least two positions: one is fixedly mounted on the side of the driven gear opposite to the belt, and the other is directly connected to the end face of the shaft. Both connection positions can be achieved using a threaded connecting rod, or other fixing methods can be used. When using a threaded connecting rod, one end of the threaded rod is screwed into a threaded hole on the rim of the driven gear, or a threaded hole on the end face of the shaft, or the center hole of the shaft, and then tightened with a nut on the inner end of the threaded rod. The other end of the threaded rod passes through the alignment plate, and another nut is used to tighten and fix the alignment plate to the connecting rod. It is best to have multiple evenly distributed connecting rods, or at least three, to increase support and make the alignment plate more stable when in contact with the belt. Alternatively, if the alignment plate is installed on the end face of the shaft, a single connecting rod can be used to directly install it in the center hole of the shaft; in this case, the thickness and strength of the alignment plate should be the primary considerations. The correction plate of this invention should be a flat circular plate with a diameter sufficient to block the belt from jumping, and preferably equivalent to the tip circle diameter of the driven gear.

[0016] The connecting rod of this invention is preferably a countersunk bolt with an internal wrench hole, while the alignment plate has a countersunk stepped hole on the side opposite the belt. This way, after the connecting rod is inserted into the stepped hole, the nut of the countersunk bolt is recessed into the countersunk stepped hole, without protruding from the surface of the alignment plate, thus not affecting or scratching the belt operation. The internal wrench hole in the nut of the countersunk bolt can be a hexagonal or square hole, etc., to facilitate the installation and removal of the connecting rod. Two nuts are provided on the threaded section of the countersunk bolt to lock the depth of the threaded holes on the gear or shaft at the outer end of the alignment plate and the inner end of the connecting rod, thereby adjusting the extension position and perpendicularity of the alignment plate.

[0017] When the head roller rotates, the tail roller also rotates under the action of the belt. The two transmission gears of the correction device of this utility model rotate as a whole with the transmission shaft of the tail roller, thereby driving the two passive gears and their correction plates to rotate synchronously with the belt. When the belt at the tail roller is misaligned, the correction plates on the two rotating passive gears can effectively block and straighten the belt on both sides without causing wear to the belt. It can effectively solve the problem of belt misalignment at the tail, improve transportation efficiency, and effectively avoid the risk of belt scratches and tears, greatly reducing the number of downtime maintenance and maintenance time. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of a connection structure for the correction plate of this utility model; The components are: 1. Tail roller, 2. Drive shaft, 3. Frame, 4. Belt, 5. Drive gear, 6. Driven gear, 7. Rotary shaft, 8. Correcting plate, 9. Bearing housing one, 10. Bearing housing two, 11. Connecting rod, 12. Nut. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the preferred embodiment and accompanying drawings: like Figure 1 , 2 As shown, the belt correction device of this utility model has two pairs of gear sets installed on the drive shaft 2 of the tail roller 1 of the belt conveyor. These two pairs of gear sets are located on both sides of the tail roller 1 and the belt. Each pair of gear sets includes a drive gear 5 and a driven gear 6, and a correction plate 8 is installed on the outside of the driven gear 6 (the side opposite to the belt).

[0020] The tail roller 1 is located at the rear end of the frame 3. It is mounted on the inner walls of both sides of the frame 3 via a drive shaft 2 and bearing housing 9. Drive gears 5 are mounted on the drive shaft 2 and on both sides of the tail roller 1 via connecting keys. Driven gears 6 mesh with drive gears 5 and should be positioned above them. Driven gears 6 are mounted on the inner side of the frame 3 via a rotating shaft 7, bearing housing 10, and bearings, allowing them to rotate smoothly at the position corresponding to the belt on the tail roller 1. Both drive gears 5 and driven gears 6 can be spur gears. Besides meshing, their dimensions and speed ratios should be matched to ensure that the straightening plate rotates synchronously and at the same speed as the belt.

[0021] The correction plate 8, which is fixedly connected to the two driven gears 6 respectively, is preferably a circular flat plate or ring. The correction plate corresponds to the edge of the belt 4, including the vertical and horizontal positions and the size of the correction plate. The correction plate 8 is fixedly set on the side of the driven gear 6 opposite to the belt.

[0022] There are various ways to connect the alignment plate 8 to the driven gear 6. For example, the alignment plate 8 can be directly welded or fixed to the end face of the driven gear 6 using other fixing methods, or to the end face of the shaft 7 that drives the driven gear 6 to rotate. However, it is best to connect it through the connecting rod 11. When connecting with the connecting rod, the extension position and perpendicularity of the alignment plate can be adjusted. When connecting with the connecting rod, it can also be connected to the end of the shaft 7 or to the driven gear 6. For example, one connecting rod 11 can be used to connect the alignment plate 8 to the center hole of the shaft 7, or at least three connecting rods 11 can be used to connect the alignment plate 8 to the rim, spokes, or hub of the driven gear, or to the end face of the shaft 7.

[0023] The connecting rod 11 is preferably a countersunk bolt with an internal wrench hole. A countersunk stepped hole should be provided on the side of the alignment plate 8 opposite to the belt. After passing through the countersunk stepped hole, the countersunk bolt is preferably connected to the end face of the rotating shaft 7 or the outer surface of the driven gear 6 by a threaded connection. In this case, the center hole on the end face of the rotating shaft 7 can be a threaded hole, or three additional threaded holes can be opened on the end face of the rotating shaft 7, or at least three threaded holes can be opened on the outer end face of the driven gear 6 (such as on the rim, spokes, or hub). The threaded end of the connecting rod 11 (countersunk bolt) is screwed into the threaded hole. Two nuts 12 are provided on the threaded section of the connecting rod 11. Tightening the inner nut fixes the connecting rod 11 to the driven gear or rotating shaft and can be used to adjust the extension length and perpendicularity of the connecting rod 11 and the alignment plate. A nut located at the outer end is used to fix the alignment plate 8 and the connecting rod 11. After the countersunk bolt passes through the countersunk stepped hole, the nut located at the outer end is tightened, and the nut, together with the nut of the countersunk bolt (connecting rod 11), clamps the alignment plate 8. The nut of the countersunk bolt is recessed into the stepped hole of the alignment plate and does not protrude from the surface of the alignment plate to avoid scratching the belt. The nut of the countersunk bolt has an inner wrench hole, which can be a square, hexagonal, or other countersunk hole, to facilitate the rotation of the connecting rod 11 and the nut with an inner hole wrench, and to reduce the gap on the alignment plate, thereby reducing the friction between the alignment plate and the belt.

[0024] Of course, the connecting rod (countersunk bolt) can also be welded to the end face of the rotating shaft 7 or the outer side of the driven gear 6, and the outer end can be fixed with only a nut and screw to fix the correction plate 8, but this is not convenient for adjusting the extension position and verticality of the correction plate.

[0025] In this invention, the lower part of the straightening plate 8 is preferably positioned corresponding to the belt. When the lower part of the straightening plate 8 contacts the belt, their rotation directions are the same, reducing mutual friction. Furthermore, it is preferable to design and calculate the transmission ratio and diameter ratio of the transmission gear 5 and the driven gear 6, the size of the straightening plate 8, and its position corresponding to the belt contact point so that the linear velocity of the straightening plate 8 at the belt contact point is close to the linear velocity of the belt. When used together, the straightening plate 8 and the belt have the same direction of rotation and speed. Except for the belt's axial movement (deviation) at the tail roller 1, which may cause it to contact the straightening plate, the speeds of the straightening plate and the belt are the same in the belt's forward direction, with almost no relative motion, greatly reducing mutual wear.

Claims

1. A belt alignment device, comprising a drive shaft (2) mounted on the inner wall of the two side frames (3) via a bearing seat (9) and mounted on the tail roller (1) at the rear end of the frame (3), characterized in that: On the drive shaft (2), there are drive gears (5) on both sides of the tail roller (1). On the drive gears (5), there are driven gears (6) that mesh with the drive gears (5). On the two driven gears (6), there are circular correction plates (8) that correspond to the edge of the belt (4).

2. The belt alignment device according to claim 1, characterized in that: The transmission gear (5) and the driven gear (6) are both matching spur gears. The driven gear (6) is rotatably connected to the inner side of the frame (3) through the rotating shaft (7) and the bearing seat (10). The correction plate (8) is fixedly installed on the side of the driven gear (6) opposite to the belt.

3. The belt alignment device according to claim 2, characterized in that: The correction plate (8) is connected to the end of the rotating shaft (7) by a connecting rod (11) or to the end face of the driven gear (6) by at least three connecting rods (11).

4. A belt alignment device according to claim 3, characterized in that: The connecting rod (11) is a countersunk bolt with an inner wrench hole. The straightening plate (8) has a countersunk stepped hole on the side opposite to the belt. After the countersunk bolt passes through the countersunk stepped hole, it is threaded into the center hole or the threaded hole on the end face of the rotating shaft (7) or the threaded hole on the rim of the driven gear (6). Two nuts (12) are provided on the threaded section of the connecting rod (11). One nut at the outer end is used to fix the straightening plate (8) and the connecting rod (11), and the other nut at the inner end is used to adjust the extension length of the connecting rod (11).

5. A belt alignment device according to claim 1, characterized in that: The lower part of the correction plate (8) corresponds to the belt.

6. A belt alignment device according to any one of claims 1-5, characterized in that: The linear velocity of the rotation of the correction plate (8) and the corresponding part of the belt is similar to the linear velocity of the belt rotation.

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