A high-precision multi-dimensional force combined belt conveyor device

Abstract

The application relates to the technical field of belt conveyors, in particular to a high-precision multi-dimensional force combined belt conveyor device, which comprises a rack, roller drums and a belt, the roller drums are arranged on the rack, the belt is arranged on the roller drums, a rotating shaft is rotatably arranged on the rack, a rocker arm is rotatably connected to the rotating shaft, a counterweight is arranged at one end of the rocker arm, a speed sensor assembly is arranged at the other end of the rocker arm, speed measuring wheels are arranged on the two sides of the speed sensor assembly and are symmetrically arranged on the two sides of the belt, air bags are arranged on the speed measuring wheels, and a plurality of diaphragms are arranged in the air bags. The air bags are made of rubber material, the friction between the speed measuring wheels and the belt is improved, the slipping between the belt and the speed measuring wheels is reduced, high-speed airflow is blown out by the air bags under extrusion, the surface of the belt is cleaned, the belt is prevented from slipping due to dust, and the accuracy of the speed measurement of the conveyor is improved.

Description

Technical Field

[0001] This invention relates to the field of belt conveyor technology, specifically to a high-precision multi-dimensional force combined belt conveyor device. Background Technology

[0002] Array belt conveyors are widely used in continuous conveying of bulk materials in coal mines, power plants, ports, and other similar applications. Accurate detection of the conveyor belt speed is crucial for stable control, operational status monitoring, and fault early warning of the conveying system.

[0003] The accuracy and reliability of the speed measuring device are directly related to the level of automation control and operational safety of the conveying system. Currently, belt conveyors used in harsh conditions such as coal conveying often employ wheel-type speed measuring devices, such as the one described in application number CN201420334229.4. This device is typically installed below the conveyor and mainly consists of a rocker arm, a speed measuring wheel, and a counterweight. The rocker arm is rotatably mounted on a frame below the conveyor via a shaft and can swing up and down. The speed measuring wheel is rotatably mounted at one end of the rocker arm, with a speed sensor integrated at its shaft. A counterweight is fixedly installed at the other end of the rocker arm. Under the weight of the counterweight, the speed measuring wheel is pried upwards, ensuring it remains in contact with the bottom surface of the conveyor belt. When the conveyor is running, the friction between the bottom surface of the conveyor belt and the speed measuring wheel drives the speed measuring wheel to rotate. The speed sensor measures the conveyor belt speed based on the number of rotations of the speed measuring wheel.

[0004] However, the working environment of coal conveyors is filled with dust. During the conveying process, dust easily adheres to the bottom surface of the conveyor belt. When dust enters the contact interface between the conveyor belt and the speed measuring wheel, the loose dust particles act as the contact medium, preventing the conveyor belt from directly contacting the speed measuring wheel. Rolling friction easily forms between the dust particles, the conveyor belt, and the speed measuring wheel, causing the speed measuring wheel to fail to rotate synchronously with the conveyor belt. In this case, the speed data measured by the speed measuring device is lower than the actual conveying speed, resulting in speed feedback distortion, which in turn affects the speed closed-loop control, tension regulation, and operational status judgment of the conveying system. To improve this problem, existing technologies have attempted to create anti-slip grooves on the outer edge of the speed measuring wheel or to add a rubber layer to the outer edge of the speed measuring wheel to increase friction. However, in high-dust environments, the effectiveness of these measures is limited, and slippage is still difficult to avoid. Furthermore, to prevent material from falling during conveying, the conveyor belt is often designed with a downward-concave "U" shape. The contact area between the traditional speed measuring wheel and the bottom surface of the conveyor belt is small, usually only a line contact. Even with a rubber layer, although the contact area can be slightly increased through rubber deformation, slippage in the presence of dust will accelerate the wear of the rubber layer, causing it to fail quickly and further reducing the long-term reliability of the speed measuring device.

[0005] Therefore, to ensure the accuracy of speed detection and operational stability of array belt conveyors under harsh working conditions, a high-precision multi-dimensional force combination belt conveyor device is proposed. Summary of the Invention

[0006] The purpose of this invention is to provide a high-precision multi-dimensional force combined belt conveyor device, which increases the friction between the speed measuring wheel and the belt by setting air bladders, and cleans the dust on the belt by squeezing the air bladders with the belt, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A high-precision multi-dimensional force combined belt conveyor device includes a frame, rollers, and a belt. The rollers are mounted on the frame, and the belt is mounted on the rollers. A rotating shaft is rotatably mounted on the frame, and a rocker arm is rotatably connected to the rotating shaft. One end of the rocker arm is equipped with a counterweight, and the other end is equipped with a speed sensor assembly. Speed ​​measuring wheels are provided on both sides of the speed sensor assembly, and the speed measuring wheels are symmetrically arranged on both sides of the belt. An air bladder is provided on each speed measuring wheel. Multiple diaphragms are provided inside the air bladder, which divides the air bladder into multiple air chambers. An exhaust port communicating with the air chambers is opened on the air bladder. A spring is provided inside the air chamber, and the two sides of the spring abut against the upper and lower side walls of the air chamber, respectively.

[0008] By incorporating airbags made of rubber, the friction coefficient is increased, enhancing the friction between the speed measuring wheel and the belt. This reduces slippage between the belt and the speed measuring wheel. When the belt compresses the airbags, it sequentially compresses each air chamber. As each chamber is compressed, its internal space decreases, and the air inside is expelled through the exhaust holes, creating an airflow that blows towards the belt. Because the belt doesn't immediately reach the exhaust holes when compressing the airbags, the airflow impacts the dust on the belt before the exhaust holes come into contact with the belt. The dust is then removed from the belt by the airflow, preventing slippage between the belt and the speed measuring wheel and ensuring the accuracy of the conveyor speed measurement and the stability of the conveyor system. When the belt stops compressing the airbags, the airbags reopen under the elastic force of the springs, restoring the internal space and drawing air in from the outside through the exhaust holes. The restored airbags can then continue to expel airflow to clean the belt the next time they are compressed by the belt. This automatic, repetitive process requires no manual intervention, effectively saving on equipment control costs.

[0009] Preferably, the spring is V-shaped and the opening direction is away from the belt. The airbag is provided with a wear-resistant rubber layer. The thickness of the wear-resistant rubber layer gradually decreases towards the opening direction of the spring, and the wear-resistant rubber layer is located on the outer wall of the air chamber and perpendicular to the side wall of the airbag.

[0010] The belt is U-shaped, so when the airbag is compressed by the belt, its upper side will become inclined. The spring is V-shaped with its opening facing away from the belt, allowing the airbag to fit against the spring when compressed. The spring ensures uniform deformation of the airbag's upper surface, preventing irregular deformation that could cause the speed measuring wheel to bounce during rotation and affect detection accuracy. Because the belt is U-shaped, the first point of contact between the belt and the airbag on the speed measuring wheel is the side of the airbag closest to the speed sensor assembly. The thickness of the wear-resistant rubber layer gradually decreases towards the opening of the spring, increasing the thickness of the airbag on the side closest to the speed sensor assembly and improving its wear resistance. The thickness decreases on the other side to ensure the airbag's deformation capability, ensuring that the upper side of the airbag fits against the belt after compression, thus maximizing the contact area with the belt. The wear-resistant rubber layer is located on the outer wall of the air chamber, perpendicular to the side wall of the airbag, and is inclined on the inner wall of the air chamber, making it easier for the spring to slide along the wear-resistant rubber layer.

[0011] Preferably, the wear-resistant rubber layer is provided with a sliding piece, the sliding piece is provided with an arc portion, and the end of the spring piece is provided with a cylindrical portion that cooperates with the arc portion.

[0012] The sliding plate on the wear-resistant rubber layer reduces the friction between the wear-resistant rubber layer and the spring, preventing damage to the wear-resistant rubber layer from the spring's compression. When the spring slides along the sliding plate, the cylindrical part fits onto the arc. At this time, when the airbag is subjected to belt friction, it stretches the wear-resistant rubber layer. Due to the limiting effect of the arc, the wear-resistant rubber layer can be completely flattened, thus preventing wrinkles from forming. Furthermore, the elasticity of the spring ensures the contact area between the wear-resistant rubber layer and the belt, further preventing slippage between the speed measuring wheel and the belt, ensuring measurement accuracy. The absence of wrinkles in the wear-resistant rubber layer ensures the stability of the speed measuring wheel's rotation, guaranteeing accurate detection.

[0013] Preferably, the wear-resistant rubber layer is provided with a sealing sheet on the inner wall of the air chamber, one end of the sealing sheet extends to below the exhaust hole, a sealing gasket is provided on the end of the sealing sheet at the exhaust hole, and a rocker plate is provided on the sealing sheet, the rocker plate extending to the spring piece inside the air chamber located in front of the rotation direction.

[0014] The sealing strip can block the vent by driving the sealing gasket. Therefore, when the air chamber is compressed, the rubber deformation causes the adjacent air chamber to be compressed. At this time, the vent is still blocked, so the gas will not be discharged. However, the air pressure inside the adjacent air chambers increases. When the spring sheet deforms and slides along the slide plate, it pushes the rocker plate to flip downward, so that the vent opens when the sealing strip rotates. Due to the increased pressure inside the air chamber, the airbag can spray out gas at a higher speed, thereby improving the cleaning effect of dust.

[0015] Preferably, the airbag is provided with an air intake hole communicating with the air chamber, and the inner wall of the air chamber is provided with a shield at the air intake hole. The shield is located on one side of the air intake hole and is glued to the inner wall of the air chamber. Two elastic diaphragms are symmetrically arranged inside the exhaust hole. The two elastic diaphragms are inclined towards the center of the exhaust hole and outward from the exhaust hole, and the two elastic diaphragms are in contact with each other. The airbag is provided with a filter screen covering the air intake hole.

[0016] The air intake port is designed to allow the airbag to return to its original state when the exhaust port is blocked by the sealing gasket. The shielding plate is located on one side of the air intake port and is glued to the inner wall of the air chamber, forming a one-way structure that allows air to enter but not exit through the air intake port. Two elastic diaphragms are symmetrically arranged inside the exhaust port. The two elastic diaphragms are inclined towards the center of the exhaust port and outward from the exhaust port, and the two elastic diaphragms are in close contact with each other, which also forms a one-way structure that allows air to exit through the exhaust port but not enter through it. The filter screen covering the air intake port can reduce the intake of dust and prevent dust from entering and clogging the exhaust port.

[0017] Preferably, the airbag includes a rigid part and a flexible part, the rigid part is located on one side of the spring opening, the flexible part is disposed on the rigid part, the rigid part is connected to the speed measuring wheel, and the rigid part is provided with an inclined surface.

[0018] The rigid part is located on one side of the spring opening, which allows the lower side of the spring to abut against the rigid part when the spring is compressed, preventing the airbag from being damaged by the compression of the spring. When the spring is compressed, the side of the spring that abuts against the flexible part is flush with the inclined surface. When the airbag is compressed by the belt, and the side of the spring that abuts against the flexible part is flush with the inclined surface, the inclined surface will abut against the belt, and the airbag cannot be compressed. This prevents the diameter of the speed measuring wheel from changing, thereby avoiding the airbag jumping due to the vibration of the conveyor, which would cause the diameter of the speed measuring wheel to change and affect the accuracy of the detection.

[0019] Preferably, the flexible part has a protrusion that arches outward from the airbag.

[0020] The protrusion arches outwards from the air chamber, which allows the protrusion on the side wall to deform outwards when the air chamber is compressed. This prevents the side wall from collapsing inwards and blocking the exhaust port, thus avoiding the problem of the exhaust port being unable to blow air for cleaning.

[0021] Preferably, a rubber block is provided on the inner wall of the air chamber of the wear-resistant rubber layer, the sealing sheet is connected to the rubber block, and the thickness of the rubber block gradually decreases along the center direction of the speed measuring wheel.

[0022] The rubber block is designed with a low elastic modulus, which makes it easy for the sealing plate to flip and open the vent. The thickness of the rubber block gradually decreases along the center of the speed measuring wheel, making it easier for the rubber block to deform.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By setting up an airbag made of rubber, the friction coefficient can be increased to improve the friction between the speed measuring wheel and the belt, thereby reducing the occurrence of slippage between the belt and the speed measuring wheel. When the belt squeezes the airbag, the airbag releases high-speed gas to clean the dust on the belt, thus preventing slippage between the belt and the speed measuring wheel from affecting the accuracy of the conveyor speed measurement and ensuring the stability of the conveyor system.

[0024] 2. By setting a spring inside the airbag, the airbag is restored by the elasticity of the spring, and the airbag blowing and cleaning can be carried out automatically and repeatedly without manual control, effectively saving the control cost of the equipment. The spring is V-shaped and the opening is facing away from the belt, so that the airbag can fit on the spring when it is squeezed. This makes the upper surface of the airbag deform evenly, thus avoiding irregular deformation of the upper surface of the airbag, which would cause the speed measuring wheel to jump during rotation and affect the accuracy of the detection.

[0025] 3. By setting a wear-resistant rubber layer on the airbag, the thickness of the wear-resistant rubber layer gradually decreases towards the opening of the spring sheet. This increases the thickness of the airbag on the side close to the speed sensor assembly, improving the wear resistance of the airbag. The reduced thickness on the other side ensures the airbag's deformation capability, ensuring that the upper side of the airbag fits against the belt after being compressed, thus ensuring the contact area with the belt. The sliding piece on the wear-resistant rubber layer reduces the friction between the wear-resistant rubber layer and the spring sheet, preventing the wear-resistant rubber layer from being damaged by the spring sheet. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the speed measuring wheel section of the present invention; Figure 3 for Figure 2 Enlarged view of a section at point A in the middle; Figure 4 for Figure 2 Enlarged view of a section at point B in the middle; Figure 5 for Figure 2 Sectional view at point CC; Figure 6 for Figure 5 Enlarged view of a section at point D; Figure 7 for Figure 6 A schematic diagram of the structure of the central airbag when it is compressed by the belt.

[0027] In the diagram: 1. Frame; 2. Roller; 3. Belt; 4. Rocker arm; 5. Counterweight; 6. Speed ​​sensor assembly; 7. Speed ​​measuring wheel; 8. Airbag; 81. Rigid part; 82. Flexible part; 9. Diaphragm; 10. Air chamber; 11. Exhaust port; 12. Spring; 121. Cylindrical part; 13. Wear-resistant rubber layer; 14. Sliding plate; 141. Arc part; 15. Sealing plate; 16. Sealing gasket; 17. Rubber block; 18. Rocker plate; 19. Air intake port; 20. Shielding plate; 21. Elastic diaphragm; 22. Filter screen; 23. Inclined surface; 24. Protrusion; 25. Weighing module; 26. Mounting plate. Detailed Implementation

[0028] Please see Figures 1 to 7 This invention provides a high-precision multi-dimensional force combined belt conveyor device, the technical solution of which is as follows: Please refer to a high-precision multi-dimensional force combined belt conveyor device. Figures 1 to 7The system includes a frame 1, on which a weighing module 25 is mounted. Three rollers 2 are rotatably connected to the weighing module 25. A belt 3 is mounted on the rollers 2. The middle roller 2 is horizontally positioned, while the two side rollers 2 are inclined at an angle of 150° to the horizontal. The belt 3 forms a U-shape on the rollers 2. A rocker arm 4 is rotatably connected to the frame 1. One end of the rocker arm 4 has a mounting plate 26, on which a counterweight 5 is bolted. The other end of the rocker arm 4 has a speed sensor assembly 6. Two speed measuring wheels 7 are symmetrically positioned on both sides of the belt 3. An air bladder 8 is mounted on each speed measuring wheel 7. Multiple diaphragms 9 are installed inside the air bladder 8, dividing it into multiple air chambers 10. A drain valve on the air bladder 8 communicates with each air chamber 10. The air chamber 10 has an air hole 11 and an air spring 12 inside. The two sides of the air spring 12 abut against the upper and lower side walls of the air chamber 10 respectively. During operation, the material on the belt 3 is weighed by the weighing module 25. Under the gravity of the counterweight 5, the rocker arm 4 pushes the speed measuring wheel 7 to swing upward, so that the air bag 8 is attached to the belt 3 and squeezed. The air bag 8 is made of rubber, which can increase the friction coefficient to improve the friction between the speed measuring wheel 7 and the belt 3, thereby reducing the slippage between the belt 3 and the speed measuring wheel 7. When the air bag 8 is squeezed, the belt 3 will squeeze each air chamber 10 of the air bag 8 in turn. When each air chamber 10 is squeezed, the internal space of the air chamber 10 decreases, and the air inside the air chamber 10 will form an airflow from the exhaust hole 11 on the air chamber 10 and blow towards the belt 3. Since the belt 3 does not first squeeze the exhaust port 11 when it is squeezing the air chamber 10, the airflow blown out of the exhaust port 11 impacts the dust on the belt 3 before the exhaust port 11 comes into contact with the belt 3. The dust is then removed from the belt 3 by the impact of the airflow from the exhaust port 11, thus preventing slippage between the belt 3 and the speed measuring wheel 7, which would affect the accuracy of the conveyor speed measurement and ensure the stability of the conveyor system. When the belt 3 stops squeezing the air chamber 10, the air chamber 10 is reopened under the elastic force of the spring plate 12, and the space inside the air chamber 10 returns to its original state and draws in air from the outside through the exhaust port 11. The restored air chamber 10 can continue to spray airflow to clean the dust from the belt 3 the next time it is squeezed by the belt 3, automatically repeating the process. The operation is automated and requires no manual adjustment, effectively saving equipment control costs. The spring 12 is V-shaped, with its opening facing away from the belt 3. When the speed measuring wheel 7 swings upward, the belt 3 generates friction on the surface of the airbag 8, thereby pulling the airbag 8 towards the side closer to the speed sensor assembly 6. During the conveyor process, the belt 3 is U-shaped, so when the airbag 8 is squeezed by the belt 3, its upper side will become tilted. The spring 12 is V-shaped, with its opening facing away from the belt 3, so that when the airbag 8 is squeezed, it can fit on the spring 12. The spring 12 can make the upper surface of the airbag 8 deform evenly, thereby avoiding irregular deformation of the upper surface of the airbag 8, which would cause the speed measuring wheel 7 to jump during rotation and affect the accuracy of detection.The airbag 8 is provided with a wear-resistant rubber layer 13. The thickness of the wear-resistant rubber layer 13 gradually decreases towards the opening of the spring tumbler 12, and the wear-resistant rubber layer 13 is located on the outer wall of the air chamber 10 and perpendicular to the side wall of the airbag 8. Since the belt 3 is U-shaped, the first point of contact between the belt 3 and the airbag 8 on the speed measuring wheel 7 is the side of the airbag 8 closest to the speed sensor assembly 6. The gradual decrease in the thickness of the wear-resistant rubber layer 13 towards the opening of the spring tumbler 12 increases the thickness of the side of the airbag 8 closest to the speed sensor assembly 6, thereby improving the wear resistance of the airbag 8. The reduced thickness on the other side ensures the deformation capability of the airbag 8, ensuring that the upper side of the airbag 8 adheres to the belt 3 after being compressed, thus ensuring the protection of the belt 3. The contact area is such that the wear-resistant rubber layer 13 is located on the outer wall of the air chamber 10 and perpendicular to the side wall of the airbag 8, making the wear-resistant rubber layer 13 inclined on the inner wall of the air chamber 10, so that the spring piece 12 can slide more easily along the wear-resistant rubber layer 13; the wear-resistant rubber layer 13 is provided with a sliding piece 14, and the sliding piece 14 is provided with an arc portion 141, and the end of the spring piece 12 is provided with a cylindrical portion 121 that cooperates with the arc portion 141; the setting of the sliding piece 14 on the wear-resistant rubber layer 13 can reduce the friction between the wear-resistant rubber layer 13 and the spring piece 12, and avoid the wear-resistant rubber layer 13 being damaged by the spring piece 12. When the spring piece 12 slides along the sliding piece 14, the cylindrical portion 121 cooperates with the arc, at which time the airbag 8 is rubbed by the belt 3. When force is applied, the wear-resistant rubber layer 13 is stretched. Due to the limiting effect of the arc portion 141, the wear-resistant rubber layer 13 can be completely flattened, preventing wrinkles. Furthermore, the elastic force of the spring piece 12 ensures the contact area between the wear-resistant rubber layer 13 and the belt 3, further preventing slippage between the speed measuring wheel 7 and the belt 3, thus ensuring measurement accuracy. The absence of wrinkles in the wear-resistant rubber layer 13 ensures the stability of the speed measuring wheel 7's rotation, guaranteeing accurate detection. The flexible portion 82 is disposed on the rigid portion 81, which is connected to the speed measuring wheel 7. The rigid portion 81 has an inclined surface 23. The rigid portion 81 is located at the opening of the spring piece 12. On one side, when the spring 12 is compressed, the lower side of the spring 12 can abut against the rigid part 81, preventing the airbag 8 from being damaged by the compression of the spring 12. When the spring 12 is compressed, the side of the spring 12 that abuts against the flexible part 82 is flush with the inclined surface 23. When the airbag 8 is compressed by the belt 3, and the side of the spring 12 that abuts against the flexible part 82 is flush with the inclined surface 23, the inclined surface 23 will abut against the belt 3, and the airbag 8 cannot be further compressed, so that the diameter of the speed measuring wheel 7 will not change. This avoids the airbag 8 jumping due to the vibration of the conveyor, which would cause the diameter of the speed measuring wheel 7 to change and affect the accuracy of the detection. The flexible part 82 is provided with a protrusion 24, which arches outward from the airbag 8.The protrusion 24 arches outwards from the airbag 8, allowing the sidewall of the air chamber 10 to deform outwards when compressed. This prevents the sidewall from concave inwards and blocking the exhaust port 11, thus avoiding the problem of the exhaust port 11 being unable to blow air for cleaning. It also prevents the airbag 8 from deforming inwards from the air chamber 10, thus preventing the sealing plate 15 from flipping over and preventing the exhaust port 11 from opening, affecting dust cleaning. Furthermore, it prevents the airbag 8 from concave inwards, which would prevent the wear-resistant rubber layer 13 from fully adhering to the spring 12, causing irregular deformation on the upper surface of the airbag 8 and resulting in the speed measuring wheel 7 jumping during rotation, thus affecting the accuracy of the detection.

[0029] Please see Figures 2 to 7A rubber block 17 is provided on the inner wall of the wear-resistant rubber layer 13 within the air chamber 10. A sealing sheet 15 is connected to the rubber block 17. The sealing sheet 15 extends one end of the wear-resistant rubber layer 13 to below the exhaust hole 11. A sealing gasket 16 is provided on the end of the sealing sheet 15 at the exhaust hole 11. A rocker plate 18 is provided on the sealing sheet 15, extending to the spring piece 12 located in front of the rotation direction inside the air chamber 10. When the air chamber 10 is compressed, the rubber deformation causes the adjacent air chambers 10 to compress. At this time, the compression of the spring piece 12 is small, and the distance the spring piece 12 slides along the slider 14 is small. The small spring plate 12 does not press against the rocker arm 18. When the spring plate 12 deforms sufficiently, it presses against the rocker arm 18, pushing the sealing plate 15 downwards and causing the sealing gasket 16 to disengage from the vent hole 11, thus opening the vent hole 11 to release air. When the air chamber 10 is compressed but the sealing plate 15 does not flip, the pressure inside the air chamber 10 increases. When the vent hole 11 opens, the airbag 8 can eject higher-speed gas, thereby improving the dust cleaning effect. The thickness of the rubber block 17 gradually decreases along the center direction of the speed measuring wheel 7. The gradual decrease in the thickness of the rubber block along the center direction of the speed measuring wheel 7 makes the rubber block 17 easier to clean. Deformation occurs; the airbag 8 is provided with an air intake hole 19 communicating with the air chamber 10. A shielding plate 20 is provided on the inner wall of the air chamber 10 at the air intake hole 19. The shielding plate 20 is located on one side of the air intake hole 19 and is adhesively connected to the inner wall of the air chamber 10. Two elastic diaphragms 21 are symmetrically arranged inside the exhaust hole 11. The two elastic diaphragms 21 are inclined towards the center of the exhaust hole 11 and outwards from the exhaust hole 11, and the two elastic diaphragms 21 are in contact with each other. The airbag 8 is provided with a filter screen 22 covering the air intake hole 19. When the air chamber 10 is compressed, the air pressure pushes the elastic diaphragms 21 apart, so that the exhaust hole 11 only opens under positive pressure, thereby allowing air to pass through the airbag 8. During recovery, the exhaust port 11 will not draw in air, thus preventing dust from being drawn in. When the airbag 8 recovers, the air chamber 10 is under negative pressure. At this time, the baffle 20 opens the air intake port 19 under negative pressure. The baffle 20 is located on one side of the air intake port 19 and is glued to the inner wall of the air chamber 10, so that the baffle 20 will only open under negative pressure. This prevents the air intake port 19 from opening and causing a decrease in the internal pressure of the air chamber 10, which would affect the dust cleaning effect. When the air intake port 19 draws in air, it can ensure that the airbag 8 is reset. The filter screen 22 covering the air intake port 19 can filter dust and prevent the falling dust from entering the air chamber 10 and clogging the exhaust port 11.

[0030] Working principle: When the conveyor is running, the belt 3 moves. Under the gravity of the counterweight 5, the rocker arm 4 rotates around the shaft, pressing the speed measuring wheel 7 against the surface of the belt 3. The air bladder 8 on the speed measuring wheel 7 contacts the belt 3. The rubber material of the air bladder 8 provides high friction and reduces slippage. During the movement of the belt 3, each air chamber 10 on the air bladder 8 is squeezed in turn. When an air chamber 10 is squeezed, the sealing plate 15 first drives the sealing gasket 16 to temporarily close the exhaust hole 11 under pressure. The air pressure inside the air chamber 10 increases. As the compression intensifies, the spring plate 12 deforms and slides along the slide plate 14. The cylindrical part 121 on it pushes the rocker plate 18, causing the sealing plate 15 to flip, thereby instantly opening the exhaust hole 11. The high-pressure gas in the air chamber 10 is ejected at high speed through the one-way elastic diaphragm 21 of the exhaust hole 11, impacting the dust on the surface of the belt 3. After the dust is removed, the contact between the belt 3 and the air bladder 8 becomes tighter.

[0031] When belt 3 leaves air chamber 10, the spring plate 12 inside air chamber 10 recovers its shape due to its own elasticity, increasing the volume of air chamber 10. At this time, exhaust port 11 closes under the action of elastic diaphragm 21, and intake port 19 opens under negative pressure through baffle plate 20. Air filtered by filter screen 22 is drawn into air chamber 10, preparing for the next cleaning. At the same time, the inclined surface 23 on rigid part 81 contacts belt 3 when air bag 8 is compressed to its limit, limiting the minimum effective diameter of speed measuring wheel 7 and ensuring the benchmark for speed measurement. This cycle repeats continuously, achieving high-precision, self-cleaning, and maintenance-free measurement of belt 3 speed.

[0032] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A high-precision multi-dimensional force-combined belt conveyor device, characterized in that, The device includes a frame, rollers, and a belt. The rollers are mounted on the frame, and the belt is mounted on the rollers. A rotating shaft is rotatably mounted on the frame, and a rocker arm is rotatably connected to the rotating shaft. One end of the rocker arm is equipped with a counterweight, and the other end is equipped with a speed sensor assembly. Speed ​​measuring wheels are provided on both sides of the speed sensor assembly, and the speed measuring wheels are symmetrically arranged on both sides of the belt. An air bladder is provided on each speed measuring wheel. The air bladder contains multiple diaphragms, which divide the air bladder into multiple air chambers. An exhaust port communicating with the air chambers is provided on the air bladder. A spring is provided inside each air chamber, and the two sides of the spring abut against the upper and lower side walls of the air chamber, respectively. The spring is V-shaped and the opening is directed away from the belt. The airbag is provided with a wear-resistant rubber layer. The thickness of the wear-resistant rubber layer gradually decreases towards the opening of the spring, and the wear-resistant rubber layer is located on the outer wall of the air chamber and perpendicular to the side wall of the airbag. The wear-resistant rubber layer is provided with a sliding piece, the sliding piece is provided with an arc portion, and the end of the spring piece is provided with a cylindrical portion that mates with the arc portion; The wear-resistant rubber layer is provided with a sealing sheet on the inner wall of the air chamber. One end of the sealing sheet extends to below the exhaust hole. A sealing gasket is provided on the end of the sealing sheet at the exhaust hole. A cylindrical part is provided on the spring piece in front of the rotation direction in the air chamber. A rocker plate that cooperates with the cylindrical part is connected to the sealing sheet. The airbag is provided with an air intake hole communicating with the air chamber. The inner wall of the air chamber is provided with a shield at the air intake hole. The shield is located on one side of the air intake hole and is glued to the inner wall of the air chamber. Two elastic diaphragms are symmetrically arranged inside the exhaust hole. The two elastic diaphragms are inclined towards the center of the exhaust hole and outward from the exhaust hole, and the two elastic diaphragms are attached to each other. The airbag is provided with a filter screen covering the air intake hole.

2. The high-precision multi-dimensional force combined belt conveyor device according to claim 1, characterized in that, The airbag includes a rigid part and a flexible part. The rigid part is located on one side of the spring opening, and the flexible part is disposed on the rigid part. The rigid part is connected to the speed measuring wheel, and the rigid part is provided with an inclined surface.

3. The high-precision multi-dimensional force combined belt conveyor device according to claim 2, characterized in that, The flexible part has a protrusion that arches outward from the airbag.

4. The high-precision multi-dimensional force combined belt conveyor device according to claim 1, characterized in that, The wear-resistant rubber layer has a rubber block located on the inner wall of the air chamber, and the sealing sheet is connected to the rubber block. The thickness of the rubber block gradually decreases along the center direction of the speed measuring wheel.

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