Belt grading device with adjustable limit collar

Abstract

The utility model provides a belt grading device with adjustable limiting sleeve ring belongs to grading machine equipment technical field, include: grading machine frame, pulley group, belt and belt bounce limiting mechanism, pulley group sets up on grading machine frame, is wound with a plurality of belts on pulley group, belt bounce limiting mechanism is fixed on grading machine frame and is through the limiting sleeve ring gap and is set on the belt to realize the limitation of the jumping of belt and the spacing between the belt, the utility model discloses solve the existing technology in the process of belt conveyor operation because of various factors cause the jumping of belt everywhere and the separation from pulley, and when adding material, the spacing between the belt and the belt changes and leads to the poor grading effect, especially cannot accurate grading ginseng and other multi-stem material, at the same time, it is difficult to adapt to the grading of large weight material and super long distance grading problem, improve the operation stability and grading precision of grading machine, satisfy the demand of multi-stem material, large weight material and super long distance grading.

Description

Technical Field

[0001] This utility model belongs to the technical field of grading equipment, specifically relating to a belt grading device with an adjustable limiting collar. It can be widely used in fields such as the grading and screening of Chinese medicinal materials, fruits and vegetables, agricultural and sideline products, and ores, and the grading of materials by size, which require the grading of materials by belt conveyor. It is especially suitable for grading operations that are difficult to handle by conventional grading machines, and can also meet the needs of grading heavy materials and grading over ultra-long distances. Background Technology

[0002] In the field of material classification, belt conveyors are commonly used classification equipment, but they have many problems in actual use.

[0003] First, when belts are running at high speeds, centrifugal force can cause them to jump and detach from the pulleys. This not only leads to conveyor shutdown and affects production efficiency, but can also damage equipment components due to belt jumping, increasing maintenance costs. For example, in grading operations, if the belt detaches from the pulley, the conveying is interrupted, the entire grading process stops, and manual adjustments are required, severely impacting continuous production.

[0004] Secondly, the impact of material feeding on the belt can cause changes in the belt spacing, affecting the grading accuracy. For example, during the screening process, an unstable belt spacing can cause materials of different particle sizes to mix together, failing to achieve the expected grading accuracy and reducing product quality. This is especially true for materials with irregular shapes and many branches, such as ginseng, where the stability of the belt spacing is even more critical during grading. Existing equipment, due to the volatile belt spacing, often cannot accurately grade such materials, resulting in inconsistent quality of the graded material.

[0005] In addition, for heavy materials, the limiting devices of existing belt conveyors are prone to deformation and damage when subjected to the weight and impact of the materials, and cannot effectively limit the belt track and spacing. When classifying over ultra-long distances, the long belt running distance and the accumulated centrifugal force and material action are more likely to cause belt deviation and spacing changes. Existing devices cannot guarantee stable operation throughout the process, which seriously affects the classification effect and efficiency.

[0006] Currently, solutions to the aforementioned problems include increasing belt tension to reduce belt slippage and installing simple baffles on both sides of the belt to limit the spacing. However, these measures still have significant limitations. Increasing tension accelerates belt wear and shortens its service life; simple baffles cannot effectively cope with belt slippage caused by centrifugal force and are easily deformed under material impact, making it difficult to maintain the stability of the belt spacing over a long period. In particular, they cannot meet the needs of grading multi-branched materials, heavy materials, and ultra-long-distance materials, and cannot fundamentally meet the requirements of actual grading operations. Therefore, there is an urgent need for a grading device that can effectively limit belt slippage, maintain stable belt spacing, and adapt to various materials and working conditions. Utility Model Content

[0007] The technical problem solved by this utility model is to provide a belt grading device with an adjustable limiting collar. The purpose of this utility model is to solve the problems of belt jump and unstable spacing in the prior art.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A belt grading device with an adjustable limit collar includes: a grading machine frame, a pulley assembly, a belt, and a belt runout limiting mechanism; The pulley assembly is mounted on the classifier frame; multiple belts are wound around the pulley assembly; The belt skipping limiting mechanism is fixed on the classifier frame and is fitted onto the belt through a limiting collar gap to limit the belt skipping and the distance between belts.

[0009] Further defining the above solution, the belt skipping limiting mechanism includes a limiting collar, a mounting bracket, a fixing bracket, a height adjusting screw, and a connecting screw; The limiting collar is fitted onto the belt with a clearance fit; the mounting bracket is fixed on the classifier frame and has left and right adjustment long connecting holes; the upper end of the fixed bracket is connected to the lower part of the limiting collar through a height adjustment screw and a height adjustment nut; the connecting screw connects the lower end of the fixed bracket to the left and right adjustment long connecting holes on the mounting bracket through a connecting nut.

[0010] Further defining the above scheme, the limiting collar is configured as a circular ring, triangular ring, or trapezoidal ring structure according to the circular, triangular, or trapezoidal cross-section of the belt, with its inner diameter being larger than the outer diameter of the belt, and its inner sidewall adopting a smooth arc transition design.

[0011] As a further limitation of the above scheme, the limiting collar is made of 304 stainless steel.

[0012] As a further limitation of the above scheme, the fixing bracket is made of high-strength alloy material.

[0013] As a further limitation of the above scheme, the mounting bracket is fixed to the classifier frame by welding.

[0014] As a further limitation of the above scheme, the height adjusting screw and the height adjusting nut constitute a height adjusting mechanism for adjusting the vertical position of the limiting collar.

[0015] As a further limitation of the above scheme, the left and right adjustment long connecting hole is an elongated hole used to adjust the horizontal position of the limiting collar.

[0016] Advantages of this utility model compared to the prior art: 1. This solution effectively prevents the belt from detaching from the pulley: The ring constraint structure of the limiting collar can effectively limit the belt's jumping trajectory during operation, overcoming the adverse effects of centrifugal force. Actual testing shows that the failure rate of the belt detaching from the pulley has been reduced from 15% to less than 1%, significantly improving the operational stability of the classifier. Even when conveying materials with multiple branches and stems, such as ginseng, the equipment can still operate stably. 2. This solution ensures stable belt spacing and improves grading results, especially suitable for multi-branch materials: the fixed distance between the limiting rings effectively prevents belt spacing changes caused by material impact. In grain screening tests, grading accuracy increased from 85% to 98%; in ginseng grading tests, due to the stable belt spacing, materials of different sizes and numbers of branches can be accurately distinguished, and the grading pass rate increased from 70% to 95%, greatly improving the grading effect and meeting the grading requirements of multi-branch materials. 3. This solution has a simple structure, low cost, and is easy to promote: the limiting collar and fixed bracket have simple structures, are made of common materials, and the manufacturing cost is only 30% of that of existing complex limiting devices; 4. This solution is easy to install, requires no large-scale modification of existing grading machines, and is easy to promote and apply on belt conveyors of various grading machines. It has high economic value and practical significance, especially in the field of Chinese medicinal material grading. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of the overall structure of this utility model; Figure 2 This is a front view of the overall structure of this utility model; Figure 3 This is a partially enlarged view of the belt skipping limiting mechanism and its cooperation with the belt in this utility model; Figure 4 This is a cross-sectional view of the belt skipping limiting mechanism in this utility model. Detailed Implementation

[0018] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0021] Please see Figure 1-4 The embodiments of this utility model are described in detail below.

[0022] Example: This example provides a belt grading device with an adjustable limiting collar, including: a grading machine frame 1, a pulley group 2, a belt 3, and a belt runout limiting mechanism 4; See Figure 1-2 As shown, the pulley group 2 is mounted on the classifier frame 1; multiple belts 3 are wound around the pulley group 2; the belt jump limiting mechanism 4 is fixed on the classifier frame 1 and is fitted onto the belts 3 through a limiting collar 4-1 to limit the jump of the belts 3 and the distance between the belts 3.

[0023] In this embodiment, the limiting collar works by using its own annular structure to form a circumferential constraint on the belt. When the belt tends to jump due to centrifugal force, the inner wall of the limiting collar will block it, restricting it within a preset running trajectory. At the same time, the distance between adjacent limiting collars remains fixed, thereby ensuring the stability of the spacing between belts and ensuring that multi-branched materials can be classified according to preset standards. This device solves the problems in the prior art where belt conveyors jump around and detach from the pulleys due to various factors during operation, and the classification effect deteriorates due to changes in the spacing between belts when materials are added, especially the inability to accurately classify multi-branched materials such as ginseng. It also makes it difficult to adapt to the classification of heavy materials and ultra-long distance classification. This device improves the operational stability and classification accuracy of the classifier, meeting the needs of multi-branched materials, heavy materials, and ultra-long distance classification.

[0024] For details, please refer to Figure 3-4 As shown, the belt skipping limiting mechanism 4 includes a limiting collar 4-1, a mounting bracket 4-2, a fixed bracket 4-4, a height adjusting screw 4-7, and a connecting screw 4-5. The limiting collar 4-1 is fitted onto the belt 3 with a clearance fit, and an appropriate gap is maintained between the limiting collar 4-1 and the belt 3, which can limit belt skipping without interfering with belt operation. The mounting bracket 4-2 is fixed on the classifier frame 1 and has a left-right adjusting long connecting hole 4-3. The upper end of the fixed bracket 4-4 is connected to the lower part of the limiting collar 4-1 through the height adjusting screw 4-7 and the height adjusting nut 4-8. The connecting screw 4-5 connects the lower end of the fixed bracket 4-4 to the left-right adjusting long connecting hole 4-3 on the mounting bracket 4-2 through the connecting nut 4-6.

[0025] In this embodiment, the height adjusting screw and the height adjusting nut constitute a height adjusting mechanism, which is used to adjust the vertical position of the limiting collar to achieve height adjustment of the limiting collar; the left and right adjusting long connecting hole is an elongated hole, which can adjust the horizontal position of the limiting collar according to the actual situation to achieve precise belt limiting.

[0026] Preferably, the limiting collar 4-1 is an annular structure with an inner diameter slightly larger than the outer diameter of the belt 3, and the inner sidewall adopts a smooth arc transition design. The function of this structure is to limit the radial runout range of the belt and prevent it from detaching from the pulley without affecting the normal operation of the belt; and because the inner diameter is slightly larger than the outer diameter of the belt, it will not cause material jamming.

[0027] Preferably, the limiting collar 4-1 is made of 304 stainless steel, which can effectively prevent rusting after the equipment has been in operation for a long time.

[0028] Preferably, the fixed bracket 4-4 is made of high-strength alloy material, which has good rigidity and stability, can firmly support the limiting collar, and avoid deformation under the impact of materials and belt force. For materials with multiple branches such as ginseng, it can effectively resist the impact of the branches on the device.

[0029] Preferably, the mounting bracket 4-2 is fixed to the classifier frame 1 by welding.

[0030] The assembly process of this belt skipping limit mechanism is as follows: First, the mounting bracket 4-2 is welded to the classifier frame 1 to ensure that its position corresponds to the running trajectory of the belt 3; then, the belt 3 passes through the limit collar 4-1 and is installed on the pulley. By rotating the fixed bracket 4-4, the height adjusting nut 4-8 at its upper end rotates on the height adjusting screw 4-7 to adjust the height of the limit collar. Then, the fixed bracket 4-4 is fixed to the mounting bracket 4-2 by the connecting screw 4-5 and the connecting nut 4-6.

[0031] Working principle: After the classifier is started, belt 3 begins to run, and the limiting collar 4-1 remains fixed with the fixed bracket 4-4. When belt 3 attempts to jump outward due to centrifugal force, the inner wall of the limiting collar 4-1 blocks it, limiting its jumping amplitude and keeping it running on the pulley. When ginseng or other multi-branched materials are added, the branches of the materials impact belt 3. Since the distance between the limiting collars 4-1 is fixed, adjacent belts 3 are confined in the collars and the spacing will not change due to the action of the materials. Multi-branched materials can be accurately classified according to their size and shape through a stable belt spacing.

[0032] This device effectively limits belt slippage. Actual testing showed no belt slippage from the pulleys during 200 hours of operation, and the belt spacing remained consistently within ±1mm of the set distance. In material grading, it accurately distinguishes materials of different thicknesses and with varying numbers of branches, achieving stable grading results. Compared to grading machines without this device, operating efficiency increased by 20%, maintenance frequency decreased by 95%, and the grading pass rate increased by 25%.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A belt grading device with an adjustable limiting collar, characterized in that: include: The grading machine frame (1), pulley group (2), belt (3) and belt runout limit mechanism (4); The pulley assembly (2) is mounted on the classifier frame (1); multiple belts (3) are wound around the pulley assembly (2). The belt jumping limit mechanism (4) is fixed on the classifier frame (1) and is fitted on the belt (3) through the gap of the limit collar (4-1) to limit the jumping of the belt (3) and the distance between the belts (3).

2. The belt grading device with adjustable limiting collar according to claim 1, characterized in that: The belt skipping limiting mechanism (4) includes a limiting collar (4-1), a mounting bracket (4-2), a fixing bracket (4-4), a height adjusting screw (4-7), and a connecting screw (4-5). The limiting collar (4-1) is fitted onto the belt (3) with clearance fit; the mounting bracket (4-2) is fixed on the classifier frame (1) and has a left-right adjustment long connecting hole (4-3); the upper end of the fixed bracket (4-4) is connected to the lower part of the limiting collar (4-1) through the height adjustment screw (4-7) and the height adjustment nut (4-8); the connecting screw (4-5) connects the lower end of the fixed bracket (4-4) to the left-right adjustment long connecting hole (4-3) on the mounting bracket (4-2) through the connecting nut (4-6).

3. The belt grading device with adjustable limiting collar according to claim 1, characterized in that: The limiting collar (4-1) is configured as a circular ring, triangular ring or trapezoidal ring structure according to the circular, triangular or trapezoidal cross section of the belt (3). The inner diameter of the limiting collar (4-1) is larger than the outer diameter of the belt (3), and the inner sidewall adopts a smooth arc transition design.

4. The belt grading device with adjustable limiting collar according to claim 1, characterized in that: The limiting collar (4-1) is made of 304 stainless steel.

5. The belt grading device with adjustable limiting collar according to claim 2, characterized in that: The fixed bracket (4-4) is made of high-strength alloy material.

6. The belt grading device with adjustable limiting collar according to claim 2, characterized in that: The mounting bracket (4-2) is fixed to the classifier frame (1) by welding.

7. The belt grading device with adjustable limiting collar according to claim 2, characterized in that: The height adjusting screw (4-7) and the height adjusting nut (4-8) constitute a height adjusting mechanism, which is used to adjust the vertical height position of the limiting collar (4-1).

8. The belt grading device with adjustable limiting collar according to claim 2, characterized in that: The left and right adjustment long connecting hole (4-3) is an elongated hole used to adjust the horizontal position of the limiting collar (4-1).

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