An integrated tobacco crushing and screening device

Abstract

This utility model discloses an integrated tobacco crushing and screening device, including a crushing chamber, a motor and a feeding hopper at the top of the chamber, the motor driving a rotating shaft with a crushing component; a fixed circular plate below the crushing component, the rotating shaft extending to drive a scraper assembly above the circular plate; at least one screening section on the circular plate, and a separating discharge structure cooperating with the screening section at the bottom. This utility model integrates crushing and multi-stage screening functions within a sealed chamber, achieving continuous crushing, automatic screening, and classified collection of tobacco materials. It effectively solves the problems of cumbersome operation, low efficiency, cross-contamination, and dust dispersion inherent in traditional separate operations, and is particularly suitable for the preparation of small batches of high-requirement tobacco samples.

Description

Technical Field

[0001] This utility model relates to the field of tobacco processing technology, specifically to an integrated device for tobacco crushing and screening. Background Technology

[0002] In tobacco agricultural research, cigarette product development, and specific small-scale production, there is often a need for the fine pulverization of tobacco raw materials. This type of processing is frequently used for sample preparation, process validation, or waste recycling. For example, in breeding and cultivation research, samples of tobacco leaves from different parts are prepared into uniform fragments for chemical composition analysis; in the new product development stage, various formulation samples are pulverized to evaluate their processing characteristics and sensory quality; and in the production and recycling process, by-products such as tobacco stems and dust are pre-treated before reuse. These applications share common characteristics: small processing volumes and high requirements for material purity and particle size consistency.

[0003] In the above process, the tobacco raw materials to be pulverized are usually dried sheet or strip materials. These materials have low moisture content and relatively brittle structure, making them easy to break. However, during the pulverization process, they are prone to simultaneously generating fragments and fine powder mixtures with large size differences. Without an immediate particle size separation process, different particle size components will mix together, leading to a decrease in the uniformity and purity of the pulverized product, which in turn affects the stability and representativeness of the results in subsequent testing, experimentation, or reuse.

[0004] Currently, for small-batch, multi-sample tobacco crushing needs, laboratories and small workshops mostly use general-purpose high-speed crushers. These devices mainly achieve crushing by impacting and shearing the material with rotating blades or hammers. However, their functional design focuses primarily on crushing and discharging, without fully considering the screening and grading needs that arise immediately after crushing. The crushed product often consists of qualified fragments, incompletely crushed fiber stems, and a large amount of fine powder. If samples with a specific particle size range are required, operators must transfer the product to a separate screening device for manual or mechanical screening.

[0005] This method of separating crushing and sieving is not only cumbersome and inefficient, but also prone to dust dispersion and material loss during transfer and sieving, affecting the working environment and sample representativeness. Especially when processing multiple batches of small samples continuously, it is difficult to ensure consistency and repeatability between different batches. Therefore, developing a compact device that can simultaneously complete crushing and sieving in the same process is of great significance for improving the efficiency of small-batch processing of tobacco raw materials, particle size control accuracy, and environmental friendliness.

[0006] This application is made to address at least one of the above problems. Utility Model Content

[0007] To address the shortcomings of existing technologies, the purpose of this utility model is to provide an integrated tobacco crushing and sieving device that integrates crushing and sieving processes into the same device. After crushing, the material is automatically and continuously sieved and graded, effectively solving the problems of cumbersome operation, low efficiency, easy material contamination, and poor batch consistency in existing technologies. It is particularly suitable for small-batch, high-requirement tobacco sample preparation and processing scenarios.

[0008] The technical solution adopted in this utility model is:

[0009] An integrated tobacco crushing and screening device is provided, including a crushing box 1. The top of the crushing box 1 is provided with a motor 2 and a feeding hopper 4. The output shaft of the motor 2 is connected to a rotating shaft 3 that extends into the crushing box 1. A crushing component is provided on the rotating shaft 3. A circular plate 801 is fixedly provided inside the crushing box 1 below the crushing component.

[0010] The rotating shaft 3 extends and drives a scraper assembly 808 located above the circular plate 801, for scraping material through at least one screening section on the circular plate 801.

[0011] The bottom of the crushing box 1 is provided with a separation discharge structure that cooperates with the screening section.

[0012] Preferably, the screening section includes a first screening plate 803 and a second screening plate 804 with different sieve aperture diameters.

[0013] Preferably, the aperture of the first screening plate 803 is smaller than the aperture of the second screening plate 804.

[0014] Preferably, the circular plate 801 is further provided with a material discharge port 806;

[0015] The first screening plate 803, the second screening plate 804 and the discharge port 806 are arranged sequentially on the circular plate 801 along the rotation direction of the scraper assembly 808, so that the material can pass through the first screening plate 803, the second screening plate 804 and the discharge port 806 in sequence under the scraping of the scraper assembly 808.

[0016] Preferably, the scraper assembly 808 is located between the crushing component and the circular plate 801; the scraper assembly 808 includes a rotating rod 807 fixed to the lower end of the rotating shaft 3 and a plurality of scrapers 808 arranged in a circumferential array on the rotating rod 807, the bottom edge of the scraper 808 contacting or maintaining a small gap with the upper surface of the circular plate 801.

[0017] Preferably, the separating discharge structure includes a Y-shaped partition plate 9 fixed to the bottom of the crushing box 1; the upper edge of the Y-shaped partition plate 9 is connected to the lower surface of the circular plate 801, and divides the bottom of the crushing box 1 into three independent collection chambers, the three collection chambers respectively corresponding to the area directly below the first screening plate 803, the second screening plate 804 and the discharge port 806;

[0018] The side wall of the crushing box 1 is provided with a discharge hole 10 that communicates with each of the collection chambers.

[0019] Preferably, a disc 5 is fixedly installed inside the crushing chamber 1 between the crushing component and the scraper assembly 808. The disc 5 is fixed to the inner wall of the crushing chamber 1, and the rotating shaft 3 rotatably passes through the disc 5.

[0020] A conveying plate 6 is installed at an incline inside the disc 5, and a discharge hole 7 is opened at the lower end of the conveying plate 6.

[0021] Preferably, the discharge hole 7 is located above the first screening plate 803.

[0022] Preferably, the first screening plate 803 and the second screening plate 804 are detachably engaged in the mounting hole 802 of the circular plate 801 by the guide block 805 on their sides.

[0023] The beneficial effects of this utility model are:

[0024] 1. This utility model innovatively integrates the crushing mechanism and the screening mechanism into the same device, realizing continuous and integrated crushing and screening of materials. It changes the traditional discrete operation mode of crushing, transferring and screening, significantly reduces operation steps and total operation time, and effectively improves the processing efficiency of small-batch tobacco processing.

[0025] 2. By setting up a first and second screening plate with different sieve apertures, and working in conjunction with the scraper assembly, automated and orderly multi-stage screening of the pulverized material is achieved. This design can effectively and reliably separate fine powder from impurities, qualified tobacco fragments, and incompletely pulverized coarse stems, thereby greatly improving the purity, uniformity, and consistency of the target product (qualified fragments), ensuring the accuracy and representativeness of subsequent testing or application results.

[0026] 3. The unique design of the circular plate, the sequentially arranged screening sections, the bottom Y-shaped partition plate, and the corresponding collection chambers constitutes a complete screening and collection system with a reasonable spatial layout and smooth material flow. The continuous scraping of the scraper assembly ensures full contact between the material and the screening surface, improving screening efficiency and thoroughness; while the guide disc and precisely positioned discharge holes ensure that the material is evenly and accurately delivered to the starting point of the screening path, achieving optimized control of the process start point.

[0027] 4. The integrated design and automated screening process greatly reduce the intensity and skill requirements of manual operation, while effectively preventing dust dispersion and cross-contamination during material transfer, thus improving the working environment. Furthermore, the screening plate features a detachable design, facilitating the replacement of screens of different specifications or cleaning and maintenance as needed, enhancing the equipment's applicability and durability.

[0028] 5. This utility model has a compact structure and is particularly suitable for scenarios with small processing volumes but high requirements, such as laboratories and R&D centers. Its stable mechanical structure and defined workflow can ensure a high degree of consistency in processing conditions for different batches of materials, thereby guaranteeing the reliability and repeatability of experimental results or the quality of small batches of products. Attached Figure Description

[0029] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall external structure of the device described in this utility model;

[0031] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the pulverizing chamber;

[0032] Figure 3 This is a schematic diagram showing the relative positions and connection relationships between the disc and the filter assembly;

[0033] Figure 4 This is a schematic diagram of the decomposition or explosion of a filter component;

[0034] Figure 5 This is a schematic diagram of the connection structure between the bottom of the crushing chamber and the Y-shaped partition plate;

[0035] Figure label:

[0036] 1. Crushing chamber; 2. Motor; 3. Rotating shaft; 4. Feed hopper; 5. Disc; 6. Conveying plate; 7. Discharge hole; 8. Filter assembly; 9. Y-shaped partition plate; 10. Discharge hole; 801. Circular plate; 802. Mounting hole; 803. First screening plate; 804. Second screening plate; 805. Guide block; 806. Discharge port; 807. Rotating rod; 808. Scraper. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to embodiments, but this is not intended to limit the present invention. Any modifications or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention. Where specific techniques or conditions are not specified in the embodiments, they shall be performed in accordance with the techniques or conditions described in the literature in the field or in accordance with the product manual.

[0038] Example 1

[0039] Please see Figures 1 to 5 This utility model provides an integrated tobacco crushing and screening device, the main body of which is a vertical crushing box 1. A drive motor 2 is fixedly installed at the center of the top of the box, and feed hoppers 4 are symmetrically arranged on both sides. The output shaft of the motor 2 is connected to a rotating shaft 3 that extends vertically into the box. The upper section of the rotating shaft 3 is provided with a crushing component. In this embodiment, the crushing component adopts multiple sets of crushing blades distributed in a spiral shape.

[0040] Directly below the crushing component, a disc 5 is fixedly installed inside the crushing chamber 1. The disc 5 is fixed to the inner wall of the crushing chamber 1 and remains stationary. A rotating shaft 3 rotatably passes through the central hole of the disc 5. A feeding plate 6 is installed at an angle inside the disc 5, and a discharge hole 7 is opened at the lower end of the feeding plate 6.

[0041] Below the disc 5, a circular plate 801 is fixedly installed inside the crushing chamber 1. Two mounting holes 802 are provided on the circular plate 801, and a first screening plate 803 and a second screening plate 804 are detachably engaged in the two mounting holes 802, respectively. The first screening plate 803 has smaller sieve apertures and is mainly used to remove fine powder and impurities; the second screening plate 804 has larger sieve apertures and is mainly used to screen qualified tobacco fragments. An arc-shaped discharge port 806 is also provided on the edge of the circular plate 801. The first screening plate 803, the second screening plate 804, and the discharge port 806 are arranged sequentially on the circular plate 801 along the rotation direction of the scraper assembly, forming a complete screening path.

[0042] The lower end of the rotating shaft 3 extends above the circular plate 801 and is fixed with a rotating rod 807. Multiple scrapers 808 are arranged in a circumferential array on the rotating rod 807, and the bottom edge of the scrapers 808 contacts or maintains a small gap with the upper surface of the circular plate 801.

[0043] As a further optimization of this utility model, the lower edge of the scraper 808 is configured as a sloped structure with a specific inclination angle. This sloped surface forms an acute angle with the surface of the circular plate 801 in the rotation direction, thereby enabling it to smoothly wedge into the bottom of the material layer, achieving stable and continuous propulsion, while effectively reducing the resistance when the scraper moves forward.

[0044] A Y-shaped partition plate 9 is fixedly installed at the bottom of the crushing chamber 1. The upper edge of the partition plate 9 is connected to the lower surface of the circular plate 801, dividing the bottom of the chamber into three independent collection chambers. These three collection chambers correspond precisely to the areas directly below the first screening plate 803, the second screening plate 804, and the discharge port 806, respectively. Three discharge holes 10 are opened at corresponding positions on the side wall of the crushing chamber 1, which communicate with the three collection chambers respectively.

[0045] As a further optimization of this utility model, a drawer-type collection box (not shown in the figure) is provided at the discharge hole (10). The discharge hole (10) corresponding to each collection chamber serves as the drawer mounting port, and the drawer-type collection box can be pushed in or pulled out horizontally from the mounting port along the guide rail. During the crushing and screening operation, the collection box is in a closed state, and the material falls directly into the box; after the operation is completed, the three collection boxes can be pulled out in sequence to take out materials of different grades. This design realizes the closed collection and transfer of materials, further preventing dust dispersion and cross-contamination between materials of different grades, making the material removal process more convenient and clean.

[0046] The working principle of this utility model is as follows:

[0047] During operation, the drive motor 2 is started first, which drives the rotating shaft 3 to rotate. The tobacco raw material to be processed is fed into the feed hopper 4, and after entering the crushing zone, it is crushed into fragments by the high-speed rotating crushing blades.

[0048] The crushed material falls onto the conveyor plate 6 inside the disc 5. Due to the inclined design of the conveyor plate 6, the material slides along the surface of the conveyor plate 6 towards the discharge hole 7. Through precise positioning design, the discharge hole 7 is located above the starting end of the first screening plate 803, ensuring that the material can fall at the starting point of the screening path.

[0049] The material falling onto the circular plate 801 is propelled forward along the screening path by the rotating scraper 808. The material first passes through the first screening plate 803, and fine powder and impurities fall through the screen holes into the corresponding collection chamber and are discharged and collected through the first discharge hole 10.

[0050] The remaining material continues to be pushed by scraper 808 to the area of ​​the second screening plate 804. Here, qualified tobacco fragments fall through the screen holes into the second collection chamber and are discharged through the second discharge hole 10 as the final desired product.

[0051] Large particles and incompletely crushed materials that fail to pass through the second screening plate 804 are eventually pushed by the scraper 808 to the arc-shaped discharge port 806, and fall into the third collection chamber through the discharge port 806 and are discharged from the third discharge hole 10.

[0052] Throughout the entire process, crushing, conveying, sieving, and sorting are completed automatically and continuously within a sealed chamber, eliminating the need for intermediate transfers and effectively preventing material loss and dust pollution. By changing the sieve plates with different aperture sizes, the particle size requirements of the product can be flexibly adjusted to meet different experimental or production needs.

[0053] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this application; the dimensions described in the drawings and embodiments are not related to the specific physical object and are not used to limit the protection scope of this application. The physical dimensions can be selected and changed according to actual needs.

Claims

1. A tobacco crushing and screening integrated device, comprising a crushing chamber (1), wherein a motor (2) and a feed hopper (4) are provided on the top of the crushing chamber (1), the output shaft of the motor (2) is connected to a rotating shaft (3) extending into the crushing chamber (1), and a crushing component is provided on the rotating shaft (3), characterized in that, A circular plate (801) is fixedly arranged inside the crushing box (1) below the crushing component; the rotating shaft (3) extends and drives a scraper assembly located above the circular plate (801) for scraping the material through at least one screening section on the circular plate (801); the bottom of the crushing box (1) is provided with a separation discharge structure that cooperates with the screening section.

2. The integrated tobacco crushing and screening device according to claim 1, characterized in that, The screening section includes a first screening plate (803) and a second screening plate (804) with different sieve aperture diameters.

3. The integrated tobacco crushing and screening device according to claim 2, characterized in that, The aperture of the first sieve plate (803) is smaller than that of the second sieve plate (804).

4. The integrated tobacco crushing and screening device according to claim 2 or 3, characterized in that, The circular plate (801) is also provided with a discharge port (806); the first screening plate (803), the second screening plate (804) and the discharge port (806) are arranged sequentially on the circular plate (801) along the rotation direction of the scraper assembly, so that the material can pass through the first screening plate (803), the second screening plate (804) and the discharge port (806) sequentially under the scraping of the scraper assembly.

5. The integrated tobacco crushing and screening device according to claim 1, characterized in that, The scraper assembly is located between the crushing component and the circular plate (801); the scraper assembly includes a rotating rod (807) fixed to the lower end of the rotating shaft (3) and a plurality of scrapers (808) arranged in a circumferential array on the rotating rod (807), the bottom edge of the scraper (808) being in contact with or maintaining a small gap with the upper surface of the circular plate (801).

6. The integrated tobacco crushing and screening device according to claim 4, characterized in that, The separation discharge structure includes a Y-shaped partition plate (9) fixed to the bottom of the crushing box (1); the upper edge of the Y-shaped partition plate (9) is connected to the lower surface of the circular plate (801) and divides the bottom of the crushing box (1) into three independent collection chambers, which correspond to the areas directly below the first screening plate (803), the second screening plate (804) and the discharge port (806), respectively; the side wall of the crushing box (1) is provided with discharge holes (10) that communicate with each of the collection chambers.

7. The integrated tobacco crushing and screening device according to claim 1, characterized in that, A disc (5) is fixedly installed inside the crushing chamber (1) between the crushing component and the scraper assembly. The disc (5) is fixed on the inner wall of the crushing chamber (1), and the rotating shaft (3) rotatably passes through the disc (5). A conveying plate (6) is installed at an inclination inside the disc (5), and a feeding hole (7) is opened at the lower end of the conveying plate (6).

8. The integrated tobacco crushing and screening device according to claim 7, characterized in that, The circular plate (801) is provided with a first screening plate (803), and the discharge hole (7) is located above the first screening plate (803).

9. The integrated tobacco crushing and screening device according to claim 2, characterized in that, The first screening plate (803) and the second screening plate (804) are detachably snapped into the mounting hole (802) of the circular plate (801) by the guide block (805) on their side.

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