A belt conveyor tail anti-pinch device

Abstract

This application discloses an anti-pinch device for the tail end of a belt conveyor, relating to the field of belt conveyor technology. It includes a tail pulley and two sets of scrapers at the tail end of the conveyor body. The scrapers are symmetrically inclined to the left and right of the tail pulley's centerline, with their tops approaching the center of the tail pulley and their shape conforming to the curvature of the tail pulley surface. The ends furthest from the tail pulley are fixed to a crossbeam. A tensioning mechanism for adjusting the clamping force is provided on the conveyor body. The tail pulley has a drum-shaped structure with synchronously rotating cleaning blades at both ends, and a guide plate is positioned above it. This device can thoroughly clean the surface and ends of the tail pulley of materials adhering to them, automatically compensate for scraper wear to ensure cleaning effectiveness, and can also recover materials, reducing equipment failures and extending service life.

Description

Technical Field

[0001] This application relates to the field of belt conveyor technology, and in particular to an anti-pinch device for the tail of a belt conveyor. Background Technology

[0002] As a key piece of equipment for continuous material transport, the tail pulley of a belt conveyor is the core component that enables the conveyor belt to circulate. Through rotation, it guides the conveyor belt from the return section (lower conveyor belt) to the carrying section (upper conveyor belt), ensuring the continuity of material transport. In actual operation, due to material characteristics (such as viscosity and humidity) and the influence of the conveying environment, some material easily adheres to the surface of the tail pulley and the return section of the conveyor belt. If not cleaned in time, this can lead to uneven force on the tail pulley, conveyor belt misalignment, increased energy consumption, and in severe cases, even mechanical failure. Utility Model Content

[0003] To overcome the aforementioned technical problems, this application provides a belt conveyor tail anti-pinch device, which adopts the following technical solution: A belt conveyor tail anti-pinch device includes a tail wheel located at the tail of the machine body and scrapers for cleaning the tail wheel. The centerline of the tail wheel along its length serves as a dividing point. Two sets of scrapers are arranged in the left and right directions of the tail wheel. Each set of scrapers is inclined, and the top of the scrapers moves towards the center of the roller. The scrapers abut against the surface of the tail wheel, and their shape is adapted to fit the curvature of the tail wheel surface. The end of the scraper away from the tail wheel is fixed to a crossbeam. A tensioning mechanism is provided on the machine body to adjust the abutment force between the scraper and the surface of the tail wheel.

[0004] By adopting the above technical solution, the two sets of inclined scrapers can converge from both sides of the tail wheel to the center for cleaning. Combined with the shape that matches the curvature of the tail wheel surface, they can fully fit the tail wheel and scrape off the surface material. At the same time, the tensioning mechanism can flexibly adjust the clamping force, which not only ensures the cleaning effect but also avoids excessive wear of the scrapers, effectively solving the problem of material residue on the tail wheel surface.

[0005] Preferably, the scrapers on both sides of the centerline of the tail wheel are symmetrically arranged along the length of the tail wheel.

[0006] By adopting the above technical solution, the symmetrically arranged scrapers can ensure that the force on both sides of the tail wheel is balanced and the cleaning force is consistent, avoiding uneven wear of the tail wheel caused by excessive or insufficient cleaning on one side. At the same time, it promotes the uniform flow of material to both ends of the tail wheel and improves the overall cleaning efficiency.

[0007] Preferably, the tail wheel has a drum-shaped structure with the middle part bulging outward along its length.

[0008] By adopting the above technical solution, the drum-shaped wheel structure can guide the conveyor belt to always fit the center area of ​​the tail wheel by using the raised curved surface in the middle, reducing the phenomenon of conveyor belt deviation; at the same time, the curved surface configuration can naturally guide the sticky material to both ends of the tail wheel, which is convenient for the scraper to clean it in a concentrated manner and reduces the probability of material accumulating in the middle.

[0009] Preferably, the tensioning mechanism includes screws fixed to both sides of the machine body and extending along the length of the tail wheel, and sleeves are respectively fitted onto the screws on both sides of the crossbeam, thereby realizing the movement of the crossbeam along the axial direction of the screws.

[0010] By adopting the above technical solution, the cooperation between the screw and the sleeve allows the crossbeam to move stably along the length of the tail wheel, which facilitates precise adjustment of the relative position of the scraper and the tail wheel, adapts to scraper wear or slight changes in tail wheel size, has a simple structure and is easy to adjust, and improves the adaptability of the device.

[0011] Preferably, the tensioning mechanism further includes a tensioning component, which includes a swing block. The swing block is V-shaped and is rotatably mounted on the machine body via a pivot. One end of the swing block abuts against the end of the crossbeam, and the other end is connected to a counterweight via a spring hook, providing thrust for the crossbeam to continuously press the scraper against the surface of the tail wheel.

[0012] By adopting the above technical solution, the V-shaped swing block generates a continuous torque under the gravity of the counterweight, providing a stable thrust to the crossbeam and ensuring that the scraper blade is always in close contact with the surface of the tail wheel. When the scraper blade wears down, the counterweight can automatically push the crossbeam closer to the tail wheel through the swing block, realizing automatic compensation of the clamping force without the need for frequent manual adjustments, thus ensuring the stability of the cleaning effect.

[0013] Preferably, the tail wheel is connected to the output end of the motor and is driven to rotate by the motor; a conveyor belt is wound around the tail wheel, and the conveyor belt is wound around the outer circumference of the tail wheel, forming two layers as the tail wheel rotates, wherein the upper conveyor belt runs away from the tail wheel, and the lower conveyor belt runs towards the tail wheel.

[0014] By adopting the above technical solution, the motor drives the tail wheel to rotate and drives the conveyor belt to form a two-layer reverse running structure. The upper belt is away from the tail wheel to transport materials, while the lower belt is close to the tail wheel to facilitate the scraper to clean up the residual materials brought back. This realizes the continuous cleaning and transportation of materials during the circulation of the conveyor belt, ensuring the continuity of production.

[0015] Preferably, the tail wheel has cleaning blades coaxially fixed at both ends, extending radially outward along the tail wheel, and the cleaning blades and the tail wheel are an integrated structure that rotates synchronously.

[0016] By adopting the above technical solution, the synchronously rotating cleaning blades can use centrifugal force to quickly remove the material adhering to the end of the tail wheel, avoiding the increase in tail wheel rotation resistance or conveyor belt jamming caused by the accumulation of material at the end. At the same time, the integrated structure ensures that the cleaning blades and tail wheel run synchronously, improving the reliability of end cleaning.

[0017] Preferably, a guide plate is inclinedly arranged above the tail wheel corresponding to the positions of the two cleaning blades. One end of the guide plate is fixed to the machine body, and the other end extends to the upper conveyor belt. When the cleaning blades rotate with the tail wheel, they use centrifugal force to throw the material to the guide plate, and then the guide plate guides the material to the upper conveyor belt.

[0018] By adopting the above technical solution, the guide plate can accurately guide the material thrown out by the cleaning blade to the upper conveyor belt, realize material recycling and reuse, and reduce material waste; at the same time, it avoids the material from falling directly to the bottom of the equipment and causing accumulation, keeping the working environment clean and reducing manual cleaning costs.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. Through the design of two sets of symmetrically inclined scrapers, the curvature adapted to the drum-shaped tail wheel and the overlapping area of ​​the projection, the tail wheel surface can be completely covered and scraped; combined with the end cleaning blade and the guide plate, the material at the end of the tail wheel can be cleaned simultaneously, eliminating blind spots in cleaning and effectively solving problems such as uneven force on the tail wheel and conveyor belt deviation caused by material residue. 2. The tensioning component forms a continuous thrust through the V-shaped swing block and the counterweight. When the scraper blade becomes thin due to wear, it can automatically push the crossbeam closer to the tail wheel, compensating for the loss of clamping force in real time. It does not require frequent manual adjustment, ensuring stable contact between the scraper blade and the tail wheel during long-term use and maintaining efficient cleaning effect. 3. The drum-shaped tail wheel guides the material to move to both ends. In conjunction with the cleaning blade and guide plate, the cleaned material can be guided back to the upper conveyor belt for recycling. At the same time, it reduces the wear of the tail wheel and conveyor belt caused by material adhesion, reduces equipment energy consumption and failure probability, and extends the service life of the equipment. Attached Figure Description

[0020] Figure 1 This is a three-dimensional view of the device, mainly showing the tail wheel and scraper blades; Figure 2 This is a stereoscopic view of the device from another perspective, mainly showing the tail wheel and scraper blades; Figure 3 This is the main view of the device, primarily showing the arrangement of the scraper blades; Figure 4 This is a side view of the device, mainly showing the tensioning mechanism.

[0021] Explanation of reference numerals in the attached diagram: 1. Tail wheel; 2. Scraper; 3. Crossbeam; 4. Machine body; 51. Screw; 52. Sleeve; 53. Swing block; 54. Spring hook; 7. Guide plate; 8. Cleaning plate. Detailed Implementation

[0022] The present application will be further described in detail below with reference to the accompanying drawings.

[0023] This application discloses an anti-pinch device for the tail of a belt conveyor, referring to... Figure 1 and Figure 2 It includes a tail pulley 1 and a scraper 2 for cleaning the tail pulley 1. The tail pulley 1 has a drum-shaped structure with the middle part bulging outward along its length. This structure helps to keep the conveyor belt in the center position of the tail pulley 1 during the operation of the conveyor belt and reduces the possibility of the conveyor belt running off-center.

[0024] Reference Figure 1 , Figure 2 and Figure 3 Using the centerline along the length of the tail wheel 1 as a dividing point, two sets of scrapers 2 are symmetrically arranged to the left and right of the tail wheel 1. Each set of scrapers 2 is inclined, with the top of the scrapers 2 approaching the center of the roller. The scrapers 2 on both sides of the centerline of the tail wheel 1 are symmetrically arranged along the length of the tail wheel 1. The scrapers 2 abut against the surface of the tail wheel 1, and their shape is adapted to the curvature of the tail wheel 1 surface, ensuring that the scrapers 2 can fully and tightly contact the surface of the tail wheel 1 during rotation, scraping off the material adhering to the tail wheel 1. When the scrapers 2 are projected vertically along the length of the tail wheel 1, the projections of two adjacent scrapers 2 overlap. This arrangement allows the scrapers 2 to simultaneously cover the area along the length of the tail wheel 1, avoiding missed scraping.

[0025] The end of the scraper blade 2 away from the tail wheel 1 is fixed to the crossbeam 3. The crossbeam 3 provides stable support for the scraper blade 2, ensuring the positional stability of the scraper blade 2 during operation.

[0026] Reference Figure 1 and Figure 4The tensioning mechanism includes screws 51 fixed to both sides of the machine body 4 and extending along the length of the tail wheel 1. The crossbeam 3 is fitted onto the screws 51 via sleeves 52 on both sides. By adjusting the position of the crossbeam 3 on the screws 51, the crossbeam 3 can move axially along the screws 51, thereby adjusting the distance between the scraper 2 and the surface of the tail wheel 1 to change the clamping force. The tensioning mechanism also includes a tensioning assembly. The swing block 53 of the tensioning assembly is V-shaped, and its center is rotatably mounted on the machine body 4 via a pivot. One end of the swing block 53 abuts against the end of the crossbeam 3, and the other end is connected to a counterweight via a spring hook 54. The weight of the counterweight is transmitted to the crossbeam 3 through the swing block 53, providing a stable thrust for the crossbeam 3 to continuously press the scraper 2 against the surface of the tail wheel 1. During the long-term operation of the tail wheel 1, the scraper blade 2 may wear down and weaken the clamping force against the surface of the tail wheel 1. At this time, the counterweight of the tensioning component will, under the action of gravity, make the crossbeam 3 always maintain a pushing force towards the tail wheel 1 through the swing block 53, automatically compensate for the decrease in clamping force caused by the wear of the scraper blade 2, and maintain a good cleaning effect.

[0027] Reference Figure 1 and Figure 3 The tail wheel 1 is connected to the output end of the motor. The motor drives the tail wheel 1 to rotate. A conveyor belt is wound around the tail wheel 1. The conveyor belt is wound around the outer circumference of the tail wheel 1 and forms two layers as the tail wheel 1 rotates. The upper conveyor belt runs away from the tail wheel 1, and the lower conveyor belt runs closer to the tail wheel 1.

[0028] The tail wheel 1 has two coaxially fixed cleaning blades 8 extending radially outward from both ends. The cleaning blades 8 and the tail wheel 1 are an integrated structure that rotates synchronously. When the tail wheel 1 rotates under the drive of the motor, the cleaning blades 8 rotate synchronously as well. Above the tail wheel 1, corresponding to the positions of the cleaning blades 8 on both sides, a guide plate 7 is inclinedly arranged. One end of the guide plate 7 is fixed to the machine body 4, and the other end extends above the upper conveyor belt. The guide plate 7 has an inclined surface for guiding the material. When the cleaning blades 8 rotate with the tail wheel 1, they use centrifugal force to throw the material adhering to the end of the tail wheel 1 to the guide plate 7, and then the guide plate 7 guides the material to the upper conveyor belt.

[0029] The implementation principle of this embodiment is as follows: Under the drive of the motor, the tail wheel 1 rotates at a predetermined speed. Its drum-shaped wheel structure, with its central raised curved surface, ensures that the conveyor belt is stably attached to the central area of ​​the tail wheel 1, effectively reducing the impact of deviation on the cleaning operation. The tensioning mechanism ensures that the scraper 2 maintains effective contact with the surface of the tail wheel 1. One end of the swing block 53 abuts against the end of the crossbeam 3, and the other end is connected to the counterweight block through the spring hook 54. Under the action of gravity, a torque is generated, so that the crossbeam 3 always maintains a pressing tendency towards the tail wheel 1. When the thickness of the scraper 2 decreases due to long-term wear, the counterweight block automatically pushes the crossbeam 3 along the screw 51 axially closer to the tail wheel 1 through the swing block 53, compensating for the preload loss in real time and ensuring stable contact between the scraper 2 and the surface of the tail wheel 1.

[0030] Two sets of scraper blades 2 are arranged at an angle with the center line of the tail wheel 1 as the axis of symmetry. Their tops converge towards the middle of the tail wheel 1, and their shape precisely matches the curvature of the drum-shaped wheel surface. Furthermore, their vertical projections along the axis of the tail wheel 1 overlap, achieving full coverage scraping of the surface along the length of the tail wheel 1 and eliminating blind spots. During the rotation of the tail wheel 1, the drum-shaped wheel structure guides the material adhering to the tail wheel 1, directing the material towards both ends of the tail wheel 1. The scraper blades 2 are in close contact with the wheel surface of the tail wheel 1, scraping off the adhering material layer by layer. Due to the angled arrangement of the scraper blades 2, the scraped material moves towards both ends of the tail wheel 1 under the guidance of gravity and the inclined surface of the scraper blades 2. Some material that falls onto the lower conveyor belt returns with the conveyor belt and re-adheres onto the surface of the tail wheel 1, but due to the guiding effect of the scraper blades 2, the secondary adhesion position is closer to both ends of the tail wheel 1.

[0031] As the tail wheel 1 continues to rotate, the processes of scraping, guiding, and secondary adhesion repeat continuously. Under the repeated scraping action, the material gradually migrates to both ends of the tail wheel 1, eventually entering the rotating area of ​​the cleaning blades 8 coaxially mounted at both ends of the tail wheel 1. When the cleaning blades 8 rotate synchronously with the tail wheel 1, their radial extension structure uses centrifugal force to throw the material at their ends toward the corresponding guide plates 7. The inclined structure of the guide plates 7 precisely guides the material to the upper conveyor belt, transporting it away from the tail wheel 1, thus achieving material scraping and cleaning.

[0032] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A device for preventing material clamping at the tail of a belt conveyor, characterized in that: Includes a tail wheel (1) located at the rear of the machine body (4) and a scraper (2) for cleaning the tail wheel (1). The center line of the tail wheel (1) in the length direction is used as the dividing point. Two sets of scrapers (2) are arranged in the left and right directions of the tail wheel (1). Each set of scrapers (2) is inclined. The left and right scrapers (2) are all close to the middle of the roller with the top of the scraper (2) approaching the roller. The scraper (2) abuts against the surface of the tail wheel (1), and its shape is adapted to fit the curvature of the tail wheel (1); The end of the scraper (2) away from the tail wheel (1) is fixed to the crossbeam (3). The machine body (4) is provided with a tensioning mechanism to adjust the clamping force between the scraper (2) and the surface of the tail wheel (1).

2. The anti-pinch device for the tail of a belt conveyor according to claim 1, characterized in that: The scraper blades (2) on both sides of the center line of the tail wheel (1) are symmetrically arranged along the length of the tail wheel (1).

3. The anti-pinch device at the tail of the belt conveyor according to claim 1, characterized in that: The tail wheel (1) has a drum-shaped structure with the middle part bulging outward along its length.

4. The anti-pinch device at the tail of the belt conveyor according to claim 1, characterized in that: The tensioning mechanism includes screws (51) fixed on both sides of the machine body (4) and extending along the length of the tail wheel (1). The two sides of the crossbeam (3) are respectively sleeved on the screws (51) through sleeves (52), thereby realizing the movement of the crossbeam (3) along the axial direction of the screws (51).

5. The anti-pinch device for the tail of a belt conveyor according to claim 1, characterized in that: The tensioning mechanism also includes a tensioning component, which includes a swing block (53). The swing block (53) is V-shaped. The middle part of the swing block (53) is rotatably mounted on the machine body (4) via a rotating shaft. One end of the swing block (53) abuts against the end of the crossbeam (3), and the other end is connected to a counterweight via a spring hook (54) to provide thrust for the crossbeam (3) to continuously press the scraper (2) against the surface of the tail wheel (1).

6. The anti-pinch device at the tail of the belt conveyor according to claim 1, characterized in that: The tail wheel (1) is connected to the output end of the motor and is driven to rotate by the motor. A conveyor belt is wound around the tail wheel (1). The conveyor belt is wound around the outer circumference of the tail wheel (1) and forms two layers as the tail wheel (1) rotates. The upper conveyor belt runs away from the tail wheel (1), and the lower conveyor belt runs closer to the tail wheel (1).

7. The anti-pinch device at the tail of the belt conveyor according to claim 1, characterized in that: The tail wheel (1) has cleaning blades (8) that extend radially outward along the tail wheel (1) at both ends. The cleaning blades (8) and the tail wheel (1) are an integrated structure that rotates synchronously.

8. The anti-pinch device for the tail of a belt conveyor according to claim 7, characterized in that: Above the tail wheel (1), corresponding to the positions of the two cleaning blades (8), a guide plate (7) is inclinedly arranged. One end of the guide plate (7) is fixed to the machine body (4), and the other end extends to the upper conveyor belt. When the cleaning blades (8) rotate with the tail wheel (1), they use centrifugal force to throw the material to the guide plate (7), and then the guide plate (7) guides the material to the upper conveyor belt.

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