A sand and gravel conveying device

Abstract

The utility model relates to the technical field of concrete production discloses a sand and stone material conveying device, including frame and conveyer belt, conveyer belt is taut on two front and rear arrangement's conveyer roller, the lower half of conveyer belt is equipped with two rows of obliquely arranged support rollers, two rows of support rollers are obliquely arranged with high outside and low inside and are rotatably connected on the frame, the lower end of conveyer belt is equipped with the hopper, the outer surface of conveyer belt is fixed with a plurality of partition belts, and a plurality of partition belts form a plurality of conveying channels on the conveyer belt. By setting the partition belt on the conveyer belt to form the conveying channel, cooperating with the high outside and low inside support roller design, the middle of the conveyer belt sinks and drives the partition belt to incline, extruding and wrapping the material, significantly improving the friction between the material and the conveyer belt and the partition belt, effectively solving the problem of skidding during inclined conveying.

Description

Technical Field

[0001] This utility model relates to the field of concrete production technology, and in particular to a sand and gravel conveying device. Background Technology

[0002] In construction, concrete mixing, and other fields, inclined conveyor belts are often used to lift and transport sand, gravel, and other aggregates. Due to the gravity of the aggregates themselves, relative slippage can easily occur between the material and the conveyor belt during inclined conveying, resulting in slippage.

[0003] This slippage problem can lead to several adverse consequences: First, it reduces conveying efficiency, as materials cannot be conveyed to the designated location at the expected speed; second, it causes material accumulation, as slipping materials tend to accumulate at the lower end of the conveyor belt, requiring additional manual cleaning; and third, it affects the stability of the conveyor, and in severe cases, materials may even roll off, which not only wastes materials but may also cause safety hazards.

[0004] In existing technologies, slippage problems are typically mitigated by reducing the conveyor belt inclination angle and increasing the surface roughness of the conveyor belt, but the effects are limited. In particular, reducing the conveyor belt inclination angle significantly increases the space occupied by the equipment. Slippage is especially pronounced when conveying dry sand and gravel with low moisture content, making it difficult to completely solve the problem with simple modifications. Therefore, there is an urgent need for a conveying device that can effectively prevent slippage of sand and gravel during inclined conveying. Utility Model Content

[0005] The purpose of this invention is to provide a sand and gravel conveying device. By setting a separator on the conveyor belt to form a conveying channel, and with the support roller design that is higher on the outside and lower on the inside, the middle of the conveyor belt sinks and drives the separator to tilt inward, forming a squeezing and wrapping effect on the material. This significantly improves the friction between the material and the conveyor belt and the separator, and effectively solves the slippage problem when conveying at an incline.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: A sand and gravel conveying device includes a frame and a conveyor belt. The conveyor belt is tensioned on two conveyor rollers arranged one in front of the other, with the front conveyor roller lower than the rear conveyor roller. The conveyor rollers are rotatably connected to the frame, and the higher conveyor roller is connected to a motor that drives its rotation. Two rows of inclined support rollers are provided below the upper half of the conveyor belt. The two rows of support rollers are inclined with the outer side higher than the inner side and are rotatably connected to the frame. A hopper is provided above the lower end of the conveyor belt. Multiple separators are fixed on the outer surface of the conveyor belt, and the multiple separators form multiple conveying channels on the conveyor belt.

[0007] Sand or gravel is temporarily stored in the hopper. A motor drives the conveyor rollers at a higher position to rotate, and the friction between the rollers and the conveyor belt drives the belt. The material in the hopper automatically falls to the lower end of the conveyor belt and is then conveyed upwards with the belt. The material falling onto the conveyor belt is distributed into multiple conveying channels. When this section of the conveyor belt enters the two rows of support rollers, the support rollers, being higher on the outside and lower on the inside, cause this section of the conveyor belt to deform downwards in the middle under the weight of the material. This causes the separators on this section of the conveyor belt to tilt inwards, reducing the cross-sectional area of ​​the conveying channel. The adjacent separators squeeze and wrap the material in the conveying channel, resulting in smaller gaps between the materials and better "adhesion" between them. At the same time, the squeezing increases the static friction between the material and the separators on both sides, reducing slippage.

[0008] This invention is further configured such that: multiple linearly distributed protruding teeth are formed on both sides of the separator near the conveyor belt, and the protruding teeth are fixedly connected to the outer surface of the conveyor belt. The protruding teeth provide an additional barrier to the bottom of the material, further reducing the probability of the material slipping on the conveyor belt and ensuring normal material transport.

[0009] The present invention is further configured such that the separating belt and the conveyor belt are arranged perpendicularly to each other; The protruding teeth are inclined, and the angle θ formed by the extension direction of the protruding teeth and the movement direction of the separating strip is between 30° and 60°.

[0010] The present invention is further configured such that the protruding teeth on both sides of the same separator belt are staggered. When conveying materials, the protruding teeth are subjected to the reverse force of the materials, and tearing is likely to occur at the junction of the protruding teeth and the separator belt. If the protruding teeth on both sides are symmetrically arranged, tearing is more likely to occur at this node, thus making the damage at this node more serious and significantly reducing the service life. The staggered arrangement can reduce the risk of tearing and improve the service life of the entire conveyor belt.

[0011] This invention is further configured as follows: Multiple linearly arranged horizontal rollers are provided below the lower end of the upper half of the conveyor belt; multiple shaping and retaining plates are provided below the hopper, with one shaping and retaining plate on each side of each separating belt, the shaping and retaining plates abutting against the side wall of the separating belt; the front end of each shaping and retaining plate is fixed to a guide, the multiple guides are fixed to a support frame, and the support frame is positioned above the conveyor belt and fixedly connected to the machine frame. The shaping and retaining plates ensure that the separating belt below the hopper is in a vertical position, preventing material falling into the hopper from crushing the separating belt, thus ensuring that the material falls into the conveying channel and facilitating the inward tilting of the subsequent separating belt.

[0012] The present invention is further configured such that a vibrator is fixed on the support frame. When the vibrator is powered on, it causes the support frame to vibrate, which in turn causes the guide and shaping plate to vibrate. This vibrates the material falling from the hopper onto the conveyor belt, making the material more compact and thus improving the bonding ability between the materials and reducing slippage and delamination.

[0013] The present invention is further configured such that: the front end of the guide portion is formed with a triangular shaping portion, and the front end of the triangular shaping portion is formed with an arc portion. During the conveying process, the separator belt may be in a tilted or tipped state. The triangular shaping portion can "straighten" the tilted or tipped separator belt, and then the straightened separator belt is fed between two shaping and holding plates for further shaping, so that the separator belt is in a vertical state.

[0014] The present invention is further configured such that the shaping and retaining plate is suspended in the air and a gap is left between it and the conveyor belt. Separating the shaping and retaining plate from the conveyor belt reduces wear on the conveyor belt, thereby increasing the service life of the conveyor belt and reducing its conveying resistance.

[0015] The outstanding effect of this utility model is: Compared with existing technologies, by setting a separator belt on the conveyor belt to form a conveying channel, and with the support roller design that is higher on the outside and lower on the inside, the middle of the conveyor belt sinks and drives the separator belt to tilt inward, forming a compression and wrapping effect on the material. This significantly improves the friction between the material and the conveyor belt and the separator belt, and effectively solves the slippage problem when conveying at an incline.

[0016] The toothed structure on both sides of the separator can further block the bottom of the material, increase the anti-slip ability between the material and the conveyor belt, and ensure stable material conveying.

[0017] The shaping and maintaining the fit between the thin plate and the guide section ensures that the separator belt remains vertical at the material drop position, guaranteeing that the material falls accurately into the conveyor channel. At the same time, the triangular shaping section and the arc section can automatically straighten the tilted separator belt, improving the stability of equipment operation. Attached Figure Description

[0018] Figure 1 This is the right view of the present invention; Figure 2 for Figure 1 A view of A; Figure 3 for Figure 1 Top view; Figure 4 for Figure 3 A view about B; Figure 5 for Figure 1 Sectional view of CC.

[0019] Reference numerals: 1. Frame; 2. Conveyor belt; 3. Conveyor roller; 4. Motor; 5. Support roller; 6. Feed hopper; 21. Separator belt; 22. Conveying channel; 23. Convex tooth; 70. Horizontal roller; 71. Shaping and holding sheet; 72. Guide section; 73. Support frame; 74. Vibrator; 721. Triangular shaping section; 722. Circular arc section. Detailed Implementation

[0020] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0021] The following is for reference Figures 1 to 5 The present invention will be described as follows: like Figure 1 As shown, a sand and gravel conveying device includes a frame 1 and a conveyor belt 2. The conveyor belt 2 is tensioned on two conveyor rollers 3 arranged one in front of the other. The front conveyor roller 3 is lower than the rear conveyor roller 3, forming an inclined conveying angle. The conveyor rollers 3 are rotatably connected to the frame 1 via bearings. The end of the rear conveyor roller 3, which is higher, is connected to a motor 4 via a reduction mechanism. The motor 4 is fixed to the frame 1 and provides power to the conveyor belt 2.

[0022] Two rows of inclined support rollers 5 are provided below the upper half of the conveyor belt 2. The support rollers 5 are rotatably connected to the frame 1 through bearing seats. The two rows of support rollers 5 are arranged in a "V" shape with the outer side higher than the inner side. A feed hopper 6 is provided above the lower end of the conveyor belt 2. The feed hopper 6 is fixed to the frame 1 by a bracket and is used to feed material to the conveyor belt 2.

[0023] like Figure 3 As shown, multiple parallel separating belts 21 are fixed on the outer surface of the conveyor belt 2 by a vulcanization process. The separating belts 21 are made of rubber material, and the multiple separating belts 21 form multiple independent conveying channels 22 on the conveyor belt 2.

[0024] like Figure 4 As shown, the separator belt 21 has multiple linearly distributed protruding teeth 23 integrally formed on both sides of one end near the conveyor belt 2. The protruding teeth 23 are fixedly connected to the outer surface of the conveyor belt 2 by vulcanization. The separator belt 21 is perpendicular to the conveyor belt 2, and the protruding teeth 23 are inclined. The angle θ formed by the extension direction of the protruding teeth 23 and the moving direction of the separator belt 21 is 45°. The protruding teeth 23 on both sides of the same separator belt 21 are distributed in an alternating pattern to avoid stress concentration points on both sides of the separator belt 21.

[0025] like Figure 2 , Figure 4As shown, multiple linearly arranged horizontal rollers 70 are provided below the lower end of the upper half of the conveyor belt 2. The horizontal rollers 70 are rotatably connected to the frame 1 to support the lower part of the conveyor belt 2. Multiple shaping and retaining plates 71 are provided below the hopper 6. Each separating belt 21 has a shaping and retaining plate 71 on each side, and the shaping and retaining plates 71 are attached to the side wall of the separating belt 21.

[0026] The front end of the shaping and holding plate 71 is fixed on the guide part 72. Multiple guide parts 72 are fixed on the support frame 73. The support frame 73 is set above the conveyor belt 2 and is fixedly connected to the frame 1 by bolts. A vibrator 74 is fixed on the support frame 73 by bolts. The vibrator 74 is a small eccentric vibrating motor 4.

[0027] The front end of the guide section 72 is integrally formed with a triangular shaping section 721, and the front end of the triangular shaping section 721 is formed with an arc section 722, which facilitates the smooth entry of the separator belt 21 into the shaping position. The shaping maintains the thin plate 71 suspended and leaves a gap of 2-5mm between it and the conveyor belt 2 to avoid direct contact with the conveyor belt 2 and thus prevent wear.

[0028] Working Principle: Sand or gravel is temporarily stored in the hopper 6. The motor 4 drives the high-mounted conveyor roller 3 to rotate, and the friction between the conveyor roller 3 and the conveyor belt 2 drives the conveyor belt 2. The material in the hopper 6 automatically falls to the lower end of the conveyor belt 2 and is conveyed upward with the conveyor belt 2. The material falling onto the conveyor belt 2 is distributed into multiple conveying channels 22. When this part of the conveyor belt 2 enters the two rows of support rollers 5, due to the outer high and inner low setting of the support rollers 5, this part of the conveyor belt 2 deforms under the weight of the material, causing the dividing strip 21 on this section of the conveyor belt 2 to also tilt inward, and the cross-sectional area of ​​the conveying channel 22 becomes smaller. At this time, the state is as follows: Figure 5 As shown, the two adjacent separating belts 21 squeeze and wrap the material in the conveying channel 22, making the gap between the materials smaller and the materials have better "adhesion" ability. At the same time, the squeezing increases the static friction between the material and the two separating belts 21, effectively reducing the slippage problem.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A sand and gravel conveying device, comprising a frame (1) and a conveyor belt (2), wherein two rows of inclined support rollers (5) are provided below the upper half of the conveyor belt (2), the two rows of support rollers (5) being inclined with the outer side higher than the inner side and the support rollers (5) being rotatably connected to the frame (1); a hopper (6) is provided above the lower end of the conveyor belt (2); characterized in that: Multiple separators (21) are fixed on the outer surface of the conveyor belt (2), and the multiple separators (21) form multiple conveying channels (22) on the conveyor belt (2).

2. The sand and gravel conveying device according to claim 1, characterized in that: The separator (21) has multiple linearly distributed protrusions (23) formed on both sides of one end near the conveyor belt (2), and the protrusions (23) are fixedly connected to the outer surface of the conveyor belt (2).

3. The sand and gravel conveying device according to claim 2, characterized in that: The separator (21) is perpendicular to the conveyor belt (2); The protruding teeth (23) are inclined, and the angle θ formed by the extension direction of the protruding teeth (23) and the moving direction of the separating strip (21) is between 30° and 60°.

4. The sand and gravel conveying device according to claim 2, characterized in that: The protruding teeth (23) on both sides of the same dividing strip (21) are staggered.

5. A sand and gravel conveying device according to claim 1, characterized in that: The upper half of the conveyor belt (2) is provided with multiple linearly arranged horizontal rollers (70) below the lower end; the hopper (6) is provided with multiple shaping and holding plates (71) below it, and each side of the partition belt (21) is provided with a shaping and holding plate (71), and the shaping and holding plate (71) is attached to the side wall of the partition belt (21); the front end of the shaping and holding plate (71) is fixed on the guide part (72), and the multiple guide parts (72) are fixed on the support frame (73), which is located above the conveyor belt (2) and is fixedly connected to the frame (1).

6. A sand and gravel conveying device according to claim 5, characterized in that: A vibrator (74) is fixed on the support frame (73).

7. A sand and gravel conveying device according to claim 5, characterized in that: The front end of the guide portion (72) is formed with a triangular shaping portion (721), and the front end of the triangular shaping portion (721) is formed with an arc portion (722).

8. A sand and gravel conveying device according to claim 5, characterized in that: The shaping and holding plate (71) is suspended and has a gap between it and the conveyor belt (2).

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