Quantitative conveyor for ultrafine powder dry grinding production line

Abstract

The utility model relates to a quantitative conveyor, in particular to a quantitative conveyor for an ultra-fine powder dry grinding production line. Comprising a feeding box, a feeding mechanism is arranged in the feeding box, the feeding mechanism is used for conveying raw materials into the dry grinding device, the feeding mechanism comprises a conveying belt located in the feeding box, the conveying belt conveys the raw materials in the rotating process, and a tensioning mechanism is arranged at the position, close to the bottom, in the feeding box; the tensioning mechanism is used for adjusting the tensioning degree of the conveying belt and correcting deviation of the conveying belt. According to the dry grinding device, raw materials in the raw material bin fall on the conveying belt, the raw materials are conveyed into the dry grinding device through the conveying belt, the conveying belt is kept in a proper tensioning state through the tensioning mechanism in the rotating process of the conveying belt, at the moment, the conveying belt makes close contact with the rotating roller, friction force between the conveying belt and the rotating roller is increased, and the conveying belt is protected; therefore, the deviation probability of the conveying belt is reduced.

Description

Technical Field

[0001] This utility model relates to a quantitative conveyor, specifically, to a quantitative conveyor for an ultrafine powder dry grinding production line. Background Technology

[0002] Ultrafine powder dry grinding equipment is an instrument used for ultrafine powder processing of non-flammable and non-explosive brittle raw materials with medium and low hardness. During the use of the ultrafine powder dry grinding equipment, to avoid adding too much raw material at once, causing a large accumulation inside the equipment and hindering timely processing, thus reducing processing efficiency, operators typically use a quantitative conveyor to quantitatively transport the raw material into the dry grinding equipment. Most existing quantitative conveyors use conveyor belts to transport the raw material. The conveyor has an internal weighing unit whose top slides in contact with the conveyor belt. During the conveyor belt transport of raw material, the weighing unit inside the quantitative conveyor weighs the raw material per unit length on the conveyor belt. The weight is converted into an electrical signal and transmitted to the operating system. The operating system then controls the weight of the raw material transported by the conveyor belt, thereby quantitatively transporting the raw material into the dry grinding equipment and ensuring that the raw material entering the equipment is effectively pulverized.

[0003] During the rotation of the conveyor belt driven by the rotating roller, raw materials falling onto the conveyor belt impact it. This impact causes the conveyor belt to shift on the rotating roller, eventually leading to belt misalignment. This makes it easier for raw materials to fall onto the conveyor belt and accumulate inside the metering conveyor. When a large amount of raw material accumulates, it affects the normal operation of the metering conveyor, requiring manual belt correction. However, this correction often necessitates stopping the metering conveyor, reducing its conveying efficiency. To prevent belt misalignment on the rotating roller, the ends of the rotating roller... Limit blocks are typically installed to prevent conveyor belt deviation. However, during the rotation of the conveyor belt, the edges of the conveyor belt slide and rub against the limit blocks, resulting in severe wear at the edges and a reduced service life. Alternatively, the conveyor belt can be designed in a V-shape to prevent deviation or material drop. However, the bottom of the V-shaped conveyor belt is uneven, resulting in a small contact area between the V-shaped conveyor belt and the weighing unit. At the same time, the raw material on the V-shaped conveyor belt is concentrated in the middle area, which affects the weighing effect of the weighing unit on the raw material on the V-shaped conveyor belt. In view of this, we propose a quantitative conveyor for an ultrafine powder dry grinding production line. Utility Model Content

[0004] The purpose of this utility model is to provide a quantitative conveyor for an ultrafine powder dry grinding production line, so as to solve the problem mentioned in the background art that when raw materials fall on the conveyor belt, they cause the conveyor belt to deviate, resulting in the raw materials easily falling off the conveyor belt.

[0005] To achieve the above objectives, the present invention provides a quantitative conveyor for an ultrafine powder dry grinding production line, comprising a feeding box, wherein a feeding mechanism is provided inside the feeding box for conveying raw materials into the dry grinding device. The feeding mechanism includes a conveyor belt located inside the feeding box, which conveys raw materials during rotation. A tensioning mechanism is provided near the bottom inside the feeding box for adjusting the tension of the conveyor belt and correcting belt deviation. The tensioning mechanism is located below the conveyor belt and includes two tensioning rollers disposed inside the feeding box. The length of the tensioning rollers is greater than the width of the conveyor belt, and the two tensioning rollers are located on the same side. The tensioning mechanism includes a lifting assembly and an adjusting assembly. The lifting assembly moves the tensioning roller up and down inside the feeding box, and the adjusting assembly corrects the conveyor belt's deviation. The conveyor belt of the conveying mechanism rotates to transport the raw material into the dry grinding device for processing. During the rotation of the conveyor belt, the lifting assembly raises the tensioning roller, causing the bottom of the conveyor belt to rise and increase its tension. When the conveyor belt deviates, the lifting assembly lowers the tensioning roller to loosen the conveyor belt, and then the adjusting assembly corrects the deviation.

[0006] As a further improvement to this technical solution, the lifting assembly includes two first electric telescopic rods symmetrically fixedly arranged on the bottom wall of the feeding box. The two first electric telescopic rods are vertically arranged and their piston ends are fixedly provided with U-shaped mounting brackets. When the piston ends of the first electric telescopic rods extend and retract, they drive the mounting brackets to move up and down inside the feeding box. The two tension rollers are symmetrically rotated and arranged in the mounting brackets near the top. The extension and retraction of the piston ends of the first electric telescopic rods drives the mounting brackets to move up and down. During the movement, the mounting brackets drive the tension rollers to move up and down, thereby adjusting the tension of the conveyor belt.

[0007] As a further improvement to this technical solution, the adjustment assembly includes two second electric telescopic rods symmetrically fixedly arranged on the bottom wall of the mounting frame. The piston ends of the two second electric telescopic rods face opposite directions. An adjustment plate is fixedly arranged on the piston end of the second electric telescopic rod. When the piston end of the second electric telescopic rod extends or retracts, it drives the adjustment plate to move inside the mounting frame. The two adjustment plates are located on both sides of the conveyor belt, and the two ends of the adjustment plates are inclined away from the conveyor belt. The extension and retraction of the piston end of the second electric telescopic rod drives the adjustment plate to move closer to the conveyor belt, thereby correcting the conveyor belt.

[0008] As a further improvement to this technical solution, two through holes are symmetrically opened on the adjustment plate. The diameter of the through holes is larger than the diameter of the tension roller. One end of the tension roller passes through the through holes and extends outward. By setting the through holes, the adjustment plate can move along the axial direction of the tension roller outside the tension roller.

[0009] As a further improvement to this technical solution, the inside of the feeding box is provided with several rotating rollers rotatably arranged by a support frame. The length of the rotating rollers is greater than the width of the conveyor belt. The rotating rollers are located inside the conveyor belt and are in close contact with the inner surface of the conveyor belt. The rotating rollers install the conveyor belt inside the feeding box, and the rotating rollers drive the conveyor belt to rotate and transport the raw materials during rotation.

[0010] As a further improvement to this technical solution, a geared motor is fixedly installed on one side of the feeding box by a fixing frame. The output shaft of the geared motor passes through the side wall of the feeding box and is coaxially connected to the end of one of the rotating rollers through a coupling. The output shaft of the geared motor drives the rotating roller to rotate, thereby causing the rotating roller to drive the conveyor belt to rotate. The output shaft of the geared motor drives the rotating roller to rotate during the rotation process, thereby causing the rotating roller to drive the conveyor belt to rotate.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. This ultrafine powder dry grinding production line uses a quantitative conveyor. The raw materials inside the raw material silo fall into the feeding box. The rotating roller drives the conveyor belt to rotate, which transports the raw materials into the dry grinding device. During the rotation of the conveyor belt, the tensioning mechanism keeps the conveyor belt in a suitable tension state. At this time, the conveyor belt is in close contact with the rotating roller, which increases the friction between the conveyor belt and the rotating roller, thereby reducing the probability of the conveyor belt deviating. When the conveyor belt deviates, the tensioning mechanism loosens the conveyor belt, reducing the friction between the conveyor belt and the rotating roller. Then, the adjustment component corrects the conveyor belt to ensure the normal rotation and feeding of the subsequent conveyor belt. There is no need to stop the operation of the quantitative conveyor to correct the conveyor belt, thereby improving the conveying efficiency of the quantitative conveyor for raw materials. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0015] Figure 3 This is a partial cross-sectional structural diagram of the present invention;

[0016] Figure 4 This is one of the three-dimensional structural schematic diagrams of the tensioning mechanism in this utility model;

[0017] Figure 5 This is the second three-dimensional structural schematic diagram of the tensioning mechanism in this utility model;

[0018] Figure 6 This is a three-dimensional structural diagram of the adjustment component in this utility model.

[0019] The meanings of the labels in the diagram are as follows:

[0020] 1. Feeding box; 11. Feed pipe; 12. Discharge hopper;

[0021] 2. Feeding mechanism; 21. Rotary roller; 22. Conveyor belt; 23. Gear motor;

[0022] 3. Tensioning mechanism; 31. First electric telescopic rod; 32. Mounting frame; 33. Tensioning roller; 34. Second electric telescopic rod; 35. Adjusting plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Please see Figure 1 - Figure 6As shown, the purpose of this embodiment is to provide a quantitative conveyor for an ultrafine powder dry grinding production line, including a feeding box 1. The feeding box 1 has a feeding mechanism 2 inside, which is used to convey raw materials into the dry grinding device. The feeding mechanism 2 includes a conveyor belt 22 located inside the feeding box 1. The conveyor belt 22 conveys raw materials during rotation. A weighing unit is located inside the conveyor belt 22 and slides in contact with the upper surface of the conveyor belt 22. The weighing unit weighs the raw materials on the conveyor belt 22. A feed pipe 11 is fixedly installed on the top of the feeding box 1 near one side, above the conveyor belt 22. Two baffles are symmetrically fixed on the inner top wall of the feeding box 1. The axial direction of the two baffles is parallel to the rotation direction of the conveyor belt 22. The distance between the two baffles is greater than the diameter of the feed pipe 11 and less than the width of the conveyor belt 22. A gap is left between the bottom of the baffles and the upper surface of the conveyor belt 22 to prevent friction between the conveyor belt 22 and the baffles. If belt 22 is damaged, a baffle is used to block the material on conveyor belt 22 to prevent it from falling off. A discharge hopper 12 is fixedly installed inside the feeding box 1 at a position away from the feed pipe 11. The discharge hopper 12 is located below the conveyor belt 22. Several rotating rollers 21 are rotatably installed inside the feeding box 1 via a support frame. This solution uses four rotating rollers 21 arranged in a trapezoidal shape. The length of the rotating rollers 21 is greater than the width of the conveyor belt 22. The rotating rollers 21 are located inside the conveyor belt 22 and are in close contact with the inner surface of the conveyor belt 22. The several rotating rollers 21 support the conveyor belt 22 in a taut state. A reduction motor 23 is fixedly installed on one side of the feeding box 1 via a fixing frame. The output shaft of the reduction motor 23 passes through the side wall of the feeding box 1 and is coaxially connected to the end of one of the rotating rollers 21 via a coupling. The output shaft of the rotating motor 23 drives the rotating roller 21 to rotate, causing the rotating roller 21 to drive the conveyor belt 22 to rotate.

[0026] Raw materials inside the raw material silo enter the interior of the feeding box 1 through the feed pipe 11, causing the raw materials to fall onto the conveyor belt 22. At this time, the output shaft of the reduction motor 23 drives the rotating roller 21 to rotate during rotation. The rotating roller 21 drives the conveyor belt 22 to rotate through friction between itself and the conveyor belt 22, so that the conveyor belt 22 transports the raw materials from one end of the feeding box 1 to the other end. When the raw materials move above the discharge hopper 12 along with the conveyor belt 22, they fall off the conveyor belt 22 due to gravity. The raw materials fall into the interior of the discharge hopper 12 and are discharged from the feeding box 1 through the discharge hopper 12, thereby transporting the raw materials to the interior of the dry grinding device for processing.

[0027] During the conveyor belt 22's transport of raw materials, the weight of the raw materials presses down on the conveyor belt 22, causing a large bending arc during rotation. When the conveyor belt 22 bends downwards, it increases friction with the weighing unit, causing wear and tear on the weighing unit, rendering it unusable. Simultaneously, during operation, the friction between the rotating roller 21 and the conveyor belt 22 drives the belt to rotate. If the conveyor belt 22 is excessively taut, the friction between the rotating roller 21 and the belt increases, leading to increased wear on the conveyor belt 22 during material transport. Conversely, if the conveyor belt 22 is relatively slack, the friction between the rotating roller 21 and the belt decreases, causing slippage and preventing the conveyor belt 22 from transporting raw materials. To ensure the conveyor belt 22 rotates normally, refer to... Figure 2 - Figure 5 A tensioning mechanism 3 is installed near the bottom inside the feeding box 1. The tensioning mechanism 3 is used to adjust the tension of the conveyor belt 22 and to correct its deviation. Located below the conveyor belt 22, the tensioning mechanism 3 includes two tensioning rollers 33 installed inside the feeding box 1. The length of each tensioning roller 33 is greater than the width of the conveyor belt 22. The two tensioning rollers 33 are on the same plane and are in close contact with the lower surface of the conveyor belt 22. The tensioning mechanism 3 also includes a lifting assembly, which drives the tensioning rollers 33 to move up and down inside the feeding box 1. During this movement, the lifting assembly relaxes and tightens the conveyor belt 22. The lifting assembly includes two first electric telescopic rods 31 symmetrically fixed to the bottom wall of the feeding box 1. The two first electric telescopic rods 31 are vertically arranged, and their piston ends are fixedly fitted with U-shaped mounting brackets 32. The piston ends of the first electric telescopic rods 31 extend and retract during movement. The movable mounting frame 32 moves up and down inside the feeding box 1. The length of the mounting frame 32 is greater than the length of the tension roller 33. The two tension rollers 33 are rotatably mounted on the mounting frame 32. During the rotation of the conveyor belt 22, the piston end of the first electric telescopic rod 31 extends and drives the mounting frame 32 to move upward. During the movement, the mounting frame 32 drives the tension rollers 33 to rise, causing the tension rollers 33 to drive the bottom of the conveyor belt 22 to rise. During the rising process, the bottom of the conveyor belt 22 pulls and catches other parts of the conveyor belt 22, tightening the originally slack parts of the conveyor belt 22. This adjusts the tension of the conveyor belt 22, thereby maintaining a suitable tension state and maintaining a suitable friction between the conveyor belt 22 and the rotating roller 21. This avoids excessive or insufficient friction between the rotating roller 21 and the conveyor belt 22, thus extending the service life of the conveyor belt 22. It also avoids friction between the conveyor belt 22 and the weighing unit, which could render the weighing unit unusable.

[0028] When raw materials fall onto conveyor belt 22, they impact the belt, causing it to move along the rotating roller 21 and shift. This shift creates misalignment between the conveyor belt 22 and the feed pipe 11, causing the raw materials in the feed pipe 11 to fall closer to the edge of the conveyor belt 22, making it prone to falling off. To correct this shift in a timely manner and reduce wear during normal use, [reference is needed]. Figure 2 - Figure 6 An adjustment assembly is provided inside the mounting frame 32 to correct the deviation of the conveyor belt 22. The adjustment assembly includes two second electric telescopic rods 34 symmetrically fixed to the bottom wall of the mounting frame 32. The piston ends of the two second electric telescopic rods 34 face opposite directions. An adjustment plate 35 is fixedly mounted on the piston end of the second electric telescopic rod 34. When the piston ends of the second electric telescopic rods 34 extend or retract, they drive the adjustment plates 35 to move inside the mounting frame 32. The two adjustment plates 35 are located on both sides of the conveyor belt 22, with both ends of the adjustment plates 35 inclined away from the conveyor belt 22. Two through holes are symmetrically opened on the adjustment plates 35, with the diameter of the through holes being larger than the diameter of the tension roller 33, so that no friction is generated between the adjustment plates 35 and the tension roller 33 during movement, thereby ensuring normal use of the adjustment plates 35 and the tension roller 33. One end of the tension roller 33 passes through the through hole and extends outward. When the conveyor belt 22 deviates by a large distance, the piston end of the first electric telescopic rod 31 retracts, causing the mounting frame 32 to descend. During the descent of the frame 32, the tension roller 33 moves downward away from the conveyor belt 22, thereby loosening the conveyor belt 22. At this time, the friction between the conveyor belt 22 and the rotating roller 21 and the tension roller 33 decreases. Subsequently, the piston end of the second electric telescopic rod 34 retracts, causing the adjusting plate 35 to move closer to the conveyor belt 22. During the movement of the adjusting plate 35, it contacts one side of the conveyor belt 22. As the adjusting plate 35 moves, it squeezes and pushes the conveyor belt 22, moving it to a position close to the middle of the tension roller 33. This corrects the deviation of the conveyor belt 22, facilitating the subsequent conveying of raw materials by the conveyor belt 22. During the deviation correction process, the conveyor belt 22 is always rotating. After the adjusting plate 35 has completed the deviation correction of the conveyor belt 22, the piston end of the second electric telescopic rod 34 extends, causing the adjusting plate 35 to move away from the conveyor belt 22, separating the adjusting plate 35 from the conveyor belt 22. This prevents the conveyor belt 22 from rubbing against the adjusting plate 35 during rotation, thus avoiding damage to the conveyor belt 22.

[0029] In summary, the workflow of this solution is as follows: The piston end of the first electric telescopic rod 31 extends, causing the mounting frame 32 to move upward, which in turn causes the tension roller 33 and the bottom of the conveyor belt 22 to rise, thereby maintaining the conveyor belt 22 at a suitable tension. Subsequently, the output shaft of the geared motor 23 drives the rotating roller 21 to rotate, which in turn drives the conveyor belt 22 to rotate. The raw materials inside the raw material bin fall onto the conveyor belt 22 through the feed pipe 11. During the rotation, the conveyor belt 22 transports the raw materials to the interior of the dry grinding device for processing. When it is necessary to correct the conveyor belt 22, the piston end of the first electric telescopic rod 31 retracts, causing the mounting frame 32 to descend. This causes the mounting frame 32 to move the tension roller 33 and the conveyor belt 22 downwards. At this time, the conveyor belt 22 becomes loose, reducing the friction between the conveyor belt 22 and the rotating roller 21 and the tension roller 33. Subsequently, the piston end of the second electric telescopic rod 34 retracts, causing the adjusting plate 35 to move closer to the conveyor belt 22. This causes the adjusting plate 35 to push the conveyor belt 22 to a position close to the middle of the tension roller 33, thereby correcting the conveyor belt 22.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A quantitative conveyor for an ultrafine powder dry grinding production line, comprising a feeding box (1), wherein a feeding mechanism (2) is provided inside the feeding box (1), the feeding mechanism (2) being used to convey raw materials into the interior of the dry grinding device, the feeding mechanism (2) comprising a conveyor belt (22) located inside the feeding box (1), the conveyor belt (22) conveying raw materials during rotation, characterized in that: The feeding box (1) is provided with a tensioning mechanism (3) near the bottom, which is used for adjusting the tension of the conveying belt (22) and correcting the conveying belt (22). The tensioning mechanism (3) is located below the conveying belt (22). The tensioning mechanism (3) comprises two tensioning rollers (33) arranged inside the feeding box (1). The length of the tensioning roller (33) is greater than the width of the conveying belt (22). The two tensioning rollers (33) are located in the same plane and are in close contact with the lower surface of the conveying belt (22). The tensioning mechanism (3) further comprises a lifting assembly and an adjusting assembly. The lifting assembly is used to drive the tensioning roller (33) to move up and down inside the feeding box (1). The adjusting assembly is used to correct the conveying belt (22).

2. The dosing conveyor for ultrafine powder dry grinding lines according to claim 1, characterized in that: The lifting assembly comprises two first electric telescopic rods (31) fixed symmetrically on the inner bottom wall of the feeding box (1). The two first electric telescopic rods (31) are vertically arranged and have a U-shaped mounting bracket (32) fixedly arranged at the piston end. When the first electric telescopic rod (31) is telescoped, the mounting bracket (32) moves up and down inside the feeding box (1). The two tensioning rollers (33) are symmetrically and rotatably arranged near the top of the mounting bracket (32).

3. The dosing conveyor for ultrafine powder dry grinding lines according to claim 2, characterized in that: The adjusting assembly comprises two second electric telescopic rods (34) fixed symmetrically on the inner bottom wall of the mounting bracket (32). The piston ends of the two second electric telescopic rods (34) are opposite to each other. The piston end of the second electric telescopic rod (34) is fixedly provided with an adjusting plate (35). When the second electric telescopic rod (34) is telescoped, the adjusting plate (35) moves inside the mounting bracket (32). The two adjusting plates (35) are respectively located on both sides of the conveying belt (22). The two ends of the adjusting plate (35) are inclined away from the conveying belt (22).

4. The dosing conveyor for ultrafine powder dry grinding lines according to claim 3, characterized in that: Two through holes are symmetrically formed in the adjusting plate (35). The diameter of the through hole is greater than the diameter of the tensioning roller (33). One end of the tensioning roller (33) penetrates through the through hole and extends out.

5. The dosing conveyor for an ultrafine powder dry grinding line according to claim 1, characterized in that: A plurality of rotating rollers (21) are rotatably arranged inside the feeding box (1) through a support frame. The length of the rotating roller (21) is greater than the width of the conveying belt (22). The rotating roller (21) is located inside the conveying belt (22) and is in close contact with the inner surface of the conveying belt (22).

6. The dosing conveyor for ultrafine powder dry grinding lines according to claim 5, characterized in that: A reduction motor (23) is fixedly arranged on one side of the feeding box (1) through a fixing frame. The output shaft of the reduction motor (23) penetrates through the side wall of the feeding box (1) and is coaxially and drivingly connected with the end of one of the rotating rollers (21) through a shaft coupling. The rotating output shaft of the reduction motor (23) drives the rotating roller (21) to rotate, so that the rotating roller (21) drives the conveying belt (22) to rotate.

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