Belt conveyor with anti-overrun structure

Abstract

A belt conveyor with an over-limit prevention structure, belonging to the field of conveyor technology, includes a conveyor belt rotatably mounted on a support via pulleys. The support also includes a gantry frame and width-limiting rollers arranged sequentially along the feeding direction of the conveyor belt. Two vertically arranged threaded rods are rotatably mounted on the gantry frame, and a lifting rod is threadedly connected to both rods. Two width-limiting rollers are vertically rotatably mounted on the support, positioned above the conveyor belt and on opposite sides of its width. The lifting rods control the height of excessively tall stacks of wood chips, providing space for wood chips falling below the height limit by utilizing the spacing between stacks on the conveyor belt. The rotation of the width-limiting rollers guides and straightens the wood chips, preventing further deflection and thus reducing the risk of jamming due to excessive height or deflection, ensuring normal operation.

Description

Technical Field

[0001] This utility model belongs to the field of conveyor technology, specifically a belt conveyor with an over-limit protection structure. Background Technology

[0002] In port operations, belt conveyors are used for cargo transportation, especially for short-distance transshipment. A belt conveyor, also known as a rubber belt conveyor or simply a "belt" machine, is a continuously operating transportation device that uses a conveyor belt as both a traction and load-bearing component. It utilizes the frictional resistance between the tensioned conveyor belt and the drive rollers as its traction force. Belt conveyors are frequently used in ports to transport goods.

[0003] The raw materials used in papermaking include both fibrous and non-fibrous materials. Fiber materials are mainly wood chips, which are transported to the port in a directly stacked manner. Upon arrival, the wood chips are transported by belt conveyor to a crusher for pulverization. The pulverized wood is then collected and transferred to the paper processing plant. However, during the transfer of wood chips from the conveyor to the crusher, there may be some deviation between the placement of the wood chips and the target position. This deflection relative to the conveyor belt, coupled with bumps during transport, can lead to a significant increase in deflection. This can result in the wood chips on the conveyor getting stuck at the crusher's inlet, prolonging the crushing cycle and potentially causing blockages. Another issue is that during conveyor transport, a large amount of wood chips may be grabbed and transported at once, causing excessive accumulation on the conveyor, which also hinders the smooth entry of this pile into the crusher. Utility Model Content

[0004] To address the problem of wood chips getting stuck in the crusher when transported by conveyor due to excessive stacking or deflection, this invention provides a belt conveyor with an over-limit protection structure.

[0005] This utility model is achieved through the following technical solution:

[0006] A belt conveyor with an anti-over-limit structure includes a conveyor belt, which is rotatably mounted on a support via pulleys. The support is also provided with a gantry frame and a width-limiting roller arranged sequentially along the feeding direction of the conveyor belt.

[0007] The gantry spans across the conveyor belt, and two vertically arranged threaded rods are rotatably mounted on the gantry. The threaded rods are driven to rotate by a first motor on the gantry. A lifting rod is threadedly connected to the two threaded rods.

[0008] The width limiting rollers are provided in two and are vertically rotatably mounted on the bracket. The two width limiting rollers are located above the conveyor belt and are respectively located on both sides of the width direction of the conveyor belt.

[0009] The gantry frame and its lifting rods can control excessively tall stacks of wood chips. By utilizing the certain gaps between the stacks on the conveyor belt, space is provided for wood chips that fall from the height limit. Since the deflection angle of the wood chips on the conveyor belt is small, the rotation of the width-limiting rollers guides and straightens the wood chips, preventing the deflection from expanding further. This reduces the risk of jamming due to excessive height or deflection, ensuring the normal operation of the work.

[0010] A further improvement of this invention is that the aforementioned support is also equipped with multiple correction components, which are in contact with the bottom surface of the upper belt of the conveyor belt. The correction components act directly on the conveyor belt itself to prevent belt deviation, and can cooperate with the width-limiting rollers to correct wood chip piles that have deviated from the centerline of the conveyor belt, preventing further deflection or impact on other wood chip piles on the conveyor belt.

[0011] A further improvement of this utility model is that a vertical guide groove is provided on the inner side wall of the longitudinal beam of the gantry frame, and the threaded rod is provided in the guide groove. The guide groove provides space for the threaded rod and also forms external protection for the threaded rod; since both ends of the lifting rod are respectively sleeved on the threaded rod, a part of the lifting rod is also located in the guide groove, thus also constituting the guiding function of the guide groove on the moving direction of the lifting rod.

[0012] A further improvement of this invention is that a laser rangefinder is provided on the side of the middle section of the aforementioned lifting rod. The laser rangefinder detects the height distance between the lifting rod and the conveyor belt, enabling precise control of the height limit for wood chip stacking.

[0013] A further improvement of this invention is that a height-limiting roller parallel to the lifting rod is rotatably provided on the bottom surface of the lifting rod. The height-limiting roller below the lifting rod can limit the height of the wood chip stack while simultaneously guiding the top layer of wood chips through its rotation, preventing interception and impact on the top of the wood chip stack, thus creating a certain buffer and helping to improve the stability of the wood chip stack on the conveyor belt.

[0014] A further improvement of this invention is that the lowest point of the height-limiting roller is flush with the emission point of the laser rangefinder in the horizontal plane. This helps improve the detection accuracy of the laser rangefinder on the conveyor belt when no wood chips are placed. Based on this, the downward pressure distance on the belt surface after the wood chips are piled up can be increased to ensure the optimal height of the wood chip pile without jamming, thereby improving work efficiency.

[0015] A further improvement of this invention is that the support frame is also equipped with two columns, which are symmetrically arranged on both sides of the conveyor belt. The width-limiting roller is located on the side of the column closest to the conveyor belt. The columns provide an independent and stable support structure for the width-limiting roller, ensuring that the width-limiting roller can withstand the lateral pressure of the material and operate stably.

[0016] A further improvement of this invention is that the aforementioned width-limiting roller is a silicone roller with anti-slip textures on its surface. Silicone material is relatively soft, which helps reduce hard impact damage to the edges of the wood chips when correcting a deflected stack of wood chips; the anti-slip textures on the surface of the width-limiting roller increase friction with the wood chips, preventing slippage during correction and guidance.

[0017] A further improvement of this invention is that a second motor is provided on the side of one of the aforementioned columns facing away from the conveyor belt. The output shaft of the second motor passes through the column and is rotatably mounted on a double-ended stud between the two columns. Threaded blocks are threaded to both ends of the double-ended stud, and a support shaft is provided on each threaded block. A width-limiting roller is rotatably mounted on the support shaft. By driving the double-ended stud with the second motor, the distance between the two width-limiting rollers can be adjusted synchronously and precisely, improving the versatility for different width batches of wood chips or different feed inlets of crushers.

[0018] A further improvement of this invention is that the bottom of the threaded block is provided with a mounting groove, and a protrusion for connecting the support shaft can be detachably installed in the mounting groove. The installation of the support shaft in the mounting groove via the protrusion improves the efficiency of quick replacement and maintenance of the support shaft and the threaded block.

[0019] As can be seen from the above technical solution, the beneficial effects of this utility model are: the gantry frame and its lifting rod can control the excessively high stack of wood chips, and by utilizing the certain gap between the stacks on the conveyor belt, space is provided for the wood chips that fall from the height limit in front; since the deflection angle of the wood chips on the conveyor belt is small, the rotation of the width limiting roller guides and straightens the wood chips, preventing the wood chips from deflecting further, thereby reducing the risk of jamming caused by excessive height or excessive deflection and ensuring the normal operation of the work. Attached Figure Description

[0020] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a first structural schematic diagram of a specific embodiment of the present utility model.

[0022] Figure 2 This is a second structural schematic diagram of a specific embodiment of the present utility model.

[0023] Figure 3 for Figure 2 Enlarged schematic diagram of part A in the diagram.

[0024] Figure 4 This is a schematic diagram of the threaded block and support shaft according to a specific embodiment of the present invention.

[0025] Figure 5 This is a partial structural diagram of the width-limiting roller according to a specific embodiment of the present invention.

[0026] Figure 6 This is a front view of the two width-limiting roller combination structure, which is a specific embodiment of this utility model.

[0027] Figure 7 This is a top view of the two width-limiting roller combination structure of a specific embodiment of this utility model.

[0028] Figure 8 This is a schematic diagram of the first structure of the width-limiting roller acting on the wood chip, which is a specific embodiment of the present invention.

[0029] Figure 9 This is a schematic diagram of the second structure of the width-limiting roller acting on the wood chip, which is a specific embodiment of this utility model.

[0030] In the attached diagram: 1. Bracket; 2. Third motor; 3. Gearbox; 4. Pulley; 5. Conveyor belt; 6. Correction assembly; 7. Gantry frame; 701. Longitudinal beam; 702. Crossbeam; 703. Guide groove; 8. First motor; 9. Threaded rod; 10. Lifting rod; 11. Height limiting roller; 12. Laser rangefinder; 13. Column; 14. Second motor; 15. Double-ended stud; 16. Guide rod; 17. Threaded block; 1701. Mounting groove; 18. Protrusion; 19. Support shaft; 20. Width limiting roller; 21. Turntable; 22. Protective protrusion; 23. Cone; 24. Fourth motor; 25. Support plate. Detailed Implementation

[0031] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0032] like Figures 1 to 9As shown, this utility model discloses a belt conveyor with an over-limit protection structure, including a conveyor belt 5, which is rotatably mounted on a support 1 via pulleys 4. One end of one of the pulleys 4 is driven by a third motor 2, which is also mounted on the support 1 and connected to the pulley 4 via a gearbox 3. This facilitates smooth driving of the conveyor belt 5.

[0033] like Figures 1 to 2 As shown, the support 1 is also provided with a gantry frame 7 and a width limiting roller 20 arranged sequentially along the feeding direction of the conveyor belt 5; the gantry frame 7 spans across the conveyor belt 5, and two vertically arranged threaded rods 9 are rotatably provided on the gantry frame 7. The threaded rods 9 are driven to rotate by the first motor 8 on the gantry frame 7; the two threaded rods 9 are connected by a common thread to a lifting rod 10 parallel to the crossbeam 702 of the gantry frame 7; two width limiting rollers 20 are provided and rotatably installed on the support 1 in a vertical position. The two width limiting rollers 20 are located above the conveyor belt 5 and are respectively located on both sides of the width direction of the conveyor belt 5. The gantry frame 7 and its lifting rod 10 can control the excessive height of the wood chip stacks. By utilizing the certain gap between the stacks on the conveyor belt 5, space is provided for the wood chips that fall from the height limit. Since the wood chips have a small deflection angle on the conveyor belt 5, the rotation of the width limiting roller 20 guides and straightens the wood chips, preventing the deflection from continuing to expand. This reduces the risk of jamming caused by excessive height or deflection and ensures the normal operation of the work.

[0034] like Figure 3 As shown, the inner wall of the longitudinal beam 701 of the gantry frame 7 has a vertical guide groove 703. The threaded rod 9 is placed in the guide groove 703. The threaded rod 9 passes upward through the gantry frame 7 and is connected to the first motor 8 installed on the top surface of the gantry frame 7. The guide groove 703 provides space for the threaded rod 9 and also forms external protection for the threaded rod 9. Since both ends of the lifting rod 10 are respectively sleeved on the threaded rod 9, a part of the lifting rod 10 is also located in the guide groove 703, thus also constituting the guiding function of the guide groove 703 on the moving direction of the lifting rod 10.

[0035] like Figures 1 to 2 As shown, a height-limiting roller 11 parallel to the lifting rod 10 is rotatably mounted on the bottom surface of the lifting rod 10. The height-limiting roller 11 below the lifting rod 10 can limit the height of the wood chip stack while guiding the top layer of wood chips in the stack by means of the rotation of the height-limiting roller 11, avoiding interception and impact on the top of the wood chip stack, thus forming a certain buffer and helping to improve the stability of the wood chip stack on the conveyor belt 5.

[0036] like Figures 1 to 2As shown, a laser rangefinder 12 is installed on the side of the middle part of the lifting rod 10. The laser rangefinder 12 detects the height distance between the lifting rod 10 and the conveyor belt 5, achieving precise control over the height limit of the wood chip stack. The lowest point of the height limiting roller 11 is flush with the emission point of the laser rangefinder 12 in the horizontal plane. This helps improve the detection accuracy of the laser rangefinder 12 on the conveyor belt 5 when no wood chips are placed. Based on this, the downward pressure distance on the belt surface after the wood chips are stacked can be increased to ensure the optimal height of the wood chip stack without jamming, thereby improving work efficiency.

[0037] like Figures 1 to 2 As shown, the support 1 is also provided with two columns 13, which are symmetrically arranged on both sides of the conveyor belt 5. The width limiting roller 20 is provided on the side of the column 13 closest to the conveyor belt 5. The column 13 provides an independent and stable support structure for the width limiting roller 20, ensuring that the width limiting roller 20 can withstand the lateral pressure of the material and work stably.

[0038] like Figures 1 to 2 As shown, a second motor 14 is installed on the side of one of the columns 13 facing away from the conveyor belt 5. The output shaft of the second motor 14 passes through the column 13 and is connected to a double-ended stud 15 rotatably mounted between the two columns 13. Threaded blocks 17 are threaded to both ends of the double-ended stud 15. A support shaft 19 is provided on the threaded block 17, and a width-limiting roller 20 is rotatably mounted on the support shaft 19. A guide rod 16 parallel to the double-ended stud 15 is provided on one side of the double-ended stud 15. The guide rod 16 connects the two columns 13 and passes through the two threaded blocks 17. By driving the double-ended stud 15 with the second motor 14, the distance between the two width-limiting rollers 20 can be adjusted synchronously and precisely, improving the versatility for different width batches of wood chips or different feed inlets of crushers. At the same time, it also takes into account the different degrees of deflection of the wood chips, allowing for timely adjustment of the distance between the two width-limiting rollers 20 to achieve adaptive adjustment of wood chip stacking.

[0039] like Figure 4 As shown, the threaded block 17 has a mounting groove 1701 at its bottom, and a protrusion 18 for connecting the support shaft 19 can be detachably installed in the mounting groove 1701. The installation of the support shaft 19 in the mounting groove 1701 by the protrusion 18 improves the efficiency of quick replacement and maintenance of the support shaft 19 and the threaded block 17.

[0040] like Figures 1 to 9 As shown, the width-limiting roller 20 is a silicone roller with anti-slip texture on its surface. The silicone material is relatively soft, which helps to reduce hard impact damage to the edges of the wood chips when correcting a stack of wood chips that has deflected; the anti-slip texture on the surface of the width-limiting roller 20 increases the friction with the wood chips and prevents slippage during correction and guidance.

[0041] like Figures 5 to 9 As shown, the width limiting roller 20 is rotatably mounted on the support shaft 19 via bearings, and the lower part of the support shaft 19 is provided with a support plate 25 to support the width limiting roller 20.

[0042] like Figures 5 to 9 As shown, the bottom end of the support shaft 19 is rotatably connected to a turntable 21 via a pin, and cones 23 are evenly distributed on the circumference of the turntable 21. The cones 23 can contact the lower part of the deflected wood chip stack, and the tip of the cone 23 enhances the agitation effect on the wood chip stack.

[0043] like Figures 5 to 9 As shown, a protective boss 22 is provided between the cone 23 and the turntable 21. The protective boss 22 helps to improve the structural strength of the cone 23. At the same time, when the cone 23 penetrates deeper into the wood chip pile, the protective boss 22 can limit the depth of further penetration.

[0044] like Figure 6 As shown, a fourth motor 24 is coaxially fixedly mounted on the bottom surface of the turntable 21. The shaft of the fourth motor 24 passes through the turntable 21 and is connected to a pin. Through the fixed connection between the shaft of the fourth motor 24 and the pin, when the fourth motor 24 is running, its housing is fixedly connected to the turntable 21, thereby driving the turntable 21 to rotate around the pin. A gap is left between the fourth motor 24 and the conveyor belt 5 to avoid interference with the conveyor belt 5.

[0045] like Figures 5 to 9 As shown, the axis of the turntable 21 is inclined, and the angle between the axis of the turntable 21 and the surface of the conveyor belt 5 is acute; the angle between the axis of the turntable 21 and the surface of the conveyor belt 5 is 95°. Since the lower part of the stack is more difficult to push than the upper part, the cone 23 facilitates the movement of the lower part of the stack when it comes into contact with the lower part of the wood chip stack. The inclined design of the turntable 21 is mainly due to the fact that the wood chip stack already forms downward pressure on the conveyor belt 5, and horizontal manipulation is difficult to adjust the wood chip stack. The inclined design can improve the convenience of adjusting the downward pressure of the wood chip stack on the conveyor belt 5.

[0046] like Figures 5 to 9 As shown, considering that the middle of the conveyor belt 5 will have a deeper depression than the sides after being loaded, the upper part of the deflected wood chip stack will be more inclined than the lower part. Therefore, the turntable 21 can be designed to protrude from the width limiting roller 20 so that the cone 23 and the lower part of the deflected wood chip stack will contact each other first.

[0047] like Figures 1 to 2As shown, the support 1 is also equipped with multiple correction components 6, which are in contact with the bottom surface of the upper belt of the conveyor belt 5. The correction components 6 act directly on the conveyor belt 5 itself to prevent the conveyor belt 5 from deviating, and can cooperate with the width limiting roller 20 to correct the wood chip piles that deviate from the centerline of the conveyor belt 5, so as to avoid expanding the deviation or affecting other wood chip piles on the conveyor belt 5.

[0048] The present invention discloses a belt conveyor with an anti-over-limit structure. The gantry frame and its lifting rod can control the excessive height of the wood chip stacks. By utilizing the certain gap between the stacks on the conveyor belt, space is provided for the wood chips falling from the height limit. Since the wood chips have a small deflection angle on the conveyor belt, the rotation of the width-limiting roller guides and straightens the wood chips, preventing the deflection from continuing to expand. This reduces the risk of jamming caused by excessive height or deflection, and ensures the normal operation of the work.

[0049] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A belt conveyor with an anti-overrun structure, comprising a conveyor belt (5) which is rotatably mounted on a support (1) by means of a pulley (4), characterized in that, The support (1) is also provided with a gantry frame (7) and a width limiting roller (20) arranged sequentially along the feeding direction of the conveyor belt (5); the gantry frame (7) spans across the conveyor belt (5), and two vertically arranged threaded rods (9) are rotatably provided on the gantry frame (7), and the threaded rods (9) are driven to rotate by the first motor (8) on the gantry frame (7); the two threaded rods (9) are connected by a common threaded rod (10); two width limiting rollers (20) are provided and are rotatably installed on the support (1) in a vertical position, and the two width limiting rollers (20) are located above the conveyor belt (5) and are respectively located on both sides of the width direction of the conveyor belt (5).

2. A belt conveyor having an anti-overshoot structure according to claim 1, characterized in that, The bracket (1) is also provided with a plurality of correction components (6), and the plurality of correction components (6) are in contact with the bottom surface of the upper belt of the conveyor belt (5).

3. A belt conveyor with an anti-overshoot structure according to claim 1 or 2, characterized in that, The inner wall of the longitudinal beam (701) of the gantry frame (7) is provided with a vertical guide groove (703), and the threaded rod (9) is provided in the guide groove (703).

4. A belt conveyor having an anti-overshoot structure according to claim 3, characterized in that, A laser rangefinder (12) is provided on the side of the middle part of the lifting rod (10).

5. A belt conveyor with an anti-overshoot structure according to claim 4, characterized in that, The bottom surface of the lifting rod (10) is provided with a height limiting roller (11) that is parallel to the lifting rod (10).

6. A belt conveyor with an anti-overshoot structure according to claim 5, characterized in that, The lowest point of the height limiting roller (11) is level with the emission point of the laser rangefinder (12) in the horizontal plane.

7. A belt conveyor with an over-limit protection structure according to claim 1 or 2, characterized in that, The support (1) is also provided with two columns (13), which are symmetrically arranged on both sides of the conveyor belt (5). The width limiting roller (20) is provided on the side of the column (13) closest to the conveyor belt (5).

8. A belt conveyor with an anti-overshoot structure according to claim 7, characterized in that, The width limiting roller (20) is a silicone roller and the surface of the width limiting roller (20) is provided with anti-slip texture.

9. A belt conveyor with an anti-overshoot structure according to claim 8, characterized in that, One of the columns (13) is provided with a second motor (14) on the side away from the conveyor belt (5). The output shaft of the second motor (14) passes through the column (13) and is connected to a double-headed stud (15) rotatably mounted between the two columns (13). The two ends of the double-headed stud (15) are respectively threaded with threaded blocks (17). The threaded blocks (17) are provided with a support shaft (19). The support shaft (19) is rotatably provided with a width limiting roller (20).

10. A belt conveyor with an anti-overshoot structure according to claim 9, characterized in that, The bottom of the threaded block (17) is provided with an installation groove (1701), and a protrusion (18) for connecting the support shaft (19) can be detachably installed in the installation groove (1701).

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