A lemon grading and sorting apparatus

Abstract

The utility model discloses a kind of lemon grading screening devices, the utility model relates to lemon processing technical field, scheme includes: a kind of lemon grading screening device, including: rack;First screening pedestal, first screening pedestal is installed on rack, the height of first screening pedestal is H1;Second screening pedestal, second screening pedestal is installed on rack, the height of second screening pedestal is H2, H2 is less than H1;Two screening battens, two screening battens are oppositely inclined arrangement, one end of screening batten is connected first screening pedestal, the other end of screening batten is connected second screening pedestal;Wherein, the spacing between two screening battens is linearly increasing from first screening pedestal to second screening pedestal direction, screening area is formed between two screening battens;Significantly simplify the multi-link operation process of artificial fruit taking, measurement and sorting, improve grading efficiency and guarantee specification consistency.

Description

Technical Field

[0001] This utility model relates to the field of lemon processing technology, specifically to a lemon grading and screening device. Background Technology

[0002] In the lemon production and processing system, screening and grading are core technological steps for achieving product quality control and improving economic efficiency. High-quality large lemons can be supplied to high-end supermarkets or used for gift packaging, while medium-sized lemons are suitable for the mass consumer market. A standardized product system not only facilitates storage and use for end consumers but also effectively enhances product competitiveness. In standardized processing scenarios, screening and grading ensures that the size of the raw materials is compatible with the process parameters of slicing equipment and juicing machinery, avoiding the risk of equipment jamming and component wear during operation. Lemon screening and grading can divert lemons of different sizes to differentiated processing paths. High-value large lemons are prioritized for fresh consumption or the production of high-value-added products, while small and medium-sized lemons can be used as raw materials for juicing, essential oil extraction, or feed processing, achieving optimal resource allocation across the entire industry chain.

[0003] In lemon production and processing, manual grading primarily relies on operators visually assessing the lemons or using basic measuring tools like calipers to determine individual dimensions. This grading process involves repetitive steps such as lemon picking, size measurement, standard comparison, and sorting, resulting in a lengthy, complex, and inefficient workflow. Furthermore, the accuracy of manual grading is highly dependent on the operator's experience and continuous working condition. When dealing with lemons with minute diameter differences, subjective judgment bias or fatigue can easily lead to inconsistent application of grading standards. This inconsistency in grading results directly results in significant differences in specifications within the same batch of products. Utility Model Content

[0004] The purpose of this utility model is to provide a lemon grading and screening device, which addresses the problems of the existing technology where manual grading relies on visual evaluation and single-point measurement, requiring repeated execution of multiple processes such as fruit picking, measurement, comparison and sorting, resulting in a lengthy and cumbersome process and low grading efficiency. The device can significantly simplify the multi-stage operation process of manual fruit picking, measurement and sorting, improve grading efficiency and ensure specification consistency.

[0005] This utility model is achieved through the following technical solution:

[0006] Please refer to Figure 1A lemon grading and screening device includes: a frame; a first screening base mounted on the frame with a height of H1; a second screening base mounted on the frame with a height of H2, where H2 is less than H1; and two screening strips arranged at an angle to each other, one end of each strip connected to the first screening base and the other end connected to the second screening base; wherein the distance between the two screening strips increases linearly from the first screening base to the second screening base, and a screening area is formed between the two screening strips.

[0007] Furthermore, in this utility model, the first screening base is provided with a first guide groove, and two first adjusting slides are slidably installed in the first guide groove. The first adjusting slides can be locked in a preset position in the first guide groove. The second screening base is provided with a second guide groove, and two second adjusting slides are slidably installed in the second guide groove. The second adjusting slides can be locked in a preset position in the second guide groove. The screening strip is a telescopic structure that can adjust its length. One end of the screening strip is rotatably connected to the first adjusting slide, and the other end of the screening strip is rotatably connected to the second adjusting slide.

[0008] Furthermore, in this utility model, the first screening base is provided with a plurality of first locking holes along the extension direction of the first guide groove, and the plurality of first locking holes are all connected to the first guide groove; the first adjusting slide is provided with a first assembly channel, a first elastic member is installed in the first assembly channel, the free end of the first elastic member is connected to a first pin, and the first pin can lock and engage with the plurality of first locking holes respectively.

[0009] Furthermore, in this utility model, one end of the first adjusting slide body is provided with two oppositely arranged first ear plates; one end of the screening strip is provided with a first hinge plate, and the first hinge plate is rotatably installed between the two first ear plates.

[0010] Furthermore, in this utility model, the second screening base is provided with a plurality of second locking holes along the extension direction of the second guide groove, and the plurality of second locking holes are all connected to the second guide groove; the second adjusting slide is provided with a second assembly channel, a second elastic member is installed in the second assembly channel, and a second pin is connected to the free end of the second elastic member, and the second pin can lock and engage with the plurality of second locking holes respectively.

[0011] Furthermore, in this utility model, one end of the second adjusting slide body is provided with two oppositely arranged second ear plates; one end of the screening strip is provided with a second hinge plate, which is rotatably installed between the two second ear plates.

[0012] Furthermore, in this utility model, the screening strip includes a first telescopic segment and a second telescopic segment; one end of the first telescopic segment is provided with a telescopic guide cavity, and the inner wall of the telescopic guide cavity is provided with a guide slider; one end of the second telescopic segment extends into the telescopic guide cavity, and the second telescopic segment is provided with a third guide groove along the extension direction, and the third guide groove is guided and cooperated with the guide slider.

[0013] Furthermore, in this utility model, the cross-section of the screening strip is an L-shaped bending structure, and the screening strip includes a horizontal support section and a vertical limiting section.

[0014] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0015] This utility model comprises a screening system consisting of a frame, a first screening base and a second screening base with a height difference, and screening slats that are relatively inclined and whose spacing increases linearly. Based on the lemon's own gravity, the material can automatically roll along the screening area and complete the screening, replacing the complex operation process of traditional manual grading, which involves multiple steps such as lemon grabbing, size measurement, standard comparison, and sorting. The mechanized and automated screening mode significantly improves the efficiency of grading operations. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a schematic diagram of a lemon grading and screening device;

[0018] Figure 2 A cross-sectional view showing the connection between the screening strips and the first screening base;

[0019] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0020] Figure 4 A cross-sectional view showing the connection between the screening strips and the second screening base;

[0021] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0022] Figure 6 A schematic diagram showing the connection between the first and second telescopic segments;

[0023] Figure 7 A cross-sectional view showing the connection between the first and second telescopic segments.

[0024] The attached diagram shows the markings and corresponding component names:

[0025] 1-Frame, 2-First screening base, 3-Second screening base, 4-Screening strip, 5-First guide groove, 6-First adjusting slide, 7-First assembly channel, 8-First elastic element, 9-First pin, 10-First locking hole, 11-First ear plate, 12-First hinge plate, 13-Second guide groove, 14-Second adjusting slide, 15-Second assembly channel, 16-Second elastic element, 17-Second pin, 18-Second locking hole, 19-Second ear plate, 20-Second hinge plate, 21-First telescopic segment, 22-Second telescopic segment, 23-Telescopic guide cavity, 24-Horizontal support section, 25-Vertical limiting section, 26-Guide slider, 27-Third guide groove. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0027] Example

[0028] Please refer to Figure 1 This utility model provides a lemon grading and screening device. It includes a frame 1, a first screening base 2, a second screening base 3, and two screening plates 4. The first screening base 2 is installed at one end of the frame 1, and the second screening base 3 is installed at the other end of the frame 1. The top heights of the first screening base 2 and the second screening base 3 are H1 and H2 respectively, with H2 being less than H1, forming a height difference. The two screening plates 4 are arranged at an angle relative to each other. One end of each screening plate 4 is connected to the first screening base 2, and the other end is connected to the second screening base 3. The distance between the two screening plates 4 increases linearly from the first screening base 2 to the second screening base 3, thus forming a screening area.

[0029] In actual operation, the operator places the lemons to be screened into the gap between the two screening plates 4 at the first screening base 2. Under the action of their own gravity, the lemons roll along the inclined screening plates 4 towards the second screening base 3. Since the spacing between the two screening plates 4 is set to increase linearly along the rolling direction of the lemons, when the lemons roll to a spacing position that matches their own diameter, they will fall through the gap between the two screening plates 4. Below the frame 1, multiple sorting bins are arranged sequentially along the extension direction of the screening plates 4. Each sorting bin corresponds to a different spacing section, thereby enabling the classification and collection of lemons of different sizes and realizing automated grading and screening operations. This lemon grading and screening device, by utilizing the height difference between the first screening base 2 and the second screening base 3, and the linearly increasing spacing design between the screening plates 4, fully utilizes the self-weight of the lemons to complete the size screening process. The overall structure is simple and reasonable, and features convenient operation and high screening efficiency.

[0030] For example, to meet the size grading requirements of premium, high-quality, first-grade, and second-grade fruits on the market (assuming premium fruits have a diameter greater than 80mm, high-quality fruits 70-80mm, first-grade fruits 60-70mm, and second-grade fruits 50-60mm), the two screening strips 4 can be designed as inclined linear structures with gradient segmented spacing. Specifically, three-level spacing sections are set along the extension direction of the screening strips 4: the initial spacing of the front section (0 to 0.5 lengths from the first base) is designed to be 50mm, and it continues to roll when the lemon diameter exceeds 50mm; the spacing of the middle section (0.5 to 1.0 lengths) increases linearly to 70mm, used to screen first-grade fruits of 60-70mm; the spacing of the rear section (1.0 to 1.5 lengths) further increases to 80mm to achieve the screening of high-quality fruits of 70-80mm, while premium fruits with a diameter greater than 80mm roll to the end of the screening strips 4 and are collected by an independent collection device. To ensure grading accuracy, it is recommended that the tilt angle of the screening strip 4 be controlled between 15° and 20° to keep the lemons rolling at a uniform speed. At the same time, the surface of the strip can be processed with an anti-slip texture to avoid slipping.

[0031] Please refer to Figures 1 to 5In some embodiments of this application, a first guide groove 5 is provided on the first screening base 2, and two lockable first adjusting slides 6 are slidably installed in the first guide groove 5. The first adjusting slides 6 can be fixed in a preset position within the first guide groove 5. A second guide groove 13 is correspondingly provided on the second screening base 3, and two lockable second adjusting slides 14 are slidably installed in the second guide groove 13. The screening strip 4 adopts a telescopic structure, with one end of the screening strip 4 rotatably connected to the first adjusting slide 6 and the other end rotatably connected to the second adjusting slide 14. Specifically, the two first adjusting slides 6 are respectively connected to one end of the two screening strips 4, and the two second adjusting slides 14 are respectively connected to the other end of the screening strip 4. Controlling the movement of the first adjusting slides 6 can lock one end of the screening strip 4 in a preset position in the first guide groove 5, and controlling the movement of the second adjusting slides 14 can lock the other end of the screening strip 4 in a preset position in the second guide groove 13. Because the screening strip 4 adopts a telescopic structure, when the installation posture is changed by adjusting the relative position of the two ends of the screening strip 4, the screening strip 4 can adaptively adjust its length based on its own telescopic function. This allows for the coordinated adjustment of the width and gradient parameters of the gap between the two screening strips 4 to meet the screening requirements of lemons of different specifications.

[0032] It should be noted that when the physical properties of the lemons to be screened differ from the screening process objectives, the spacing and gradient parameters of the screening slats 4 need to be adjusted accordingly. The specific adjustment timing is as follows:

[0033] When adjusting the spacing parameter, if the minimum particle size of the lemons to be screened exceeds the initial gap of the screening area, the spacing parameter of the screening plates 4 should be adjusted immediately. Increase the spacing between the two screening plates 4 to create an initial gap at the entrance of the screening area that matches the minimum particle size of the lemons. This allows lemons of different sizes to be screened based on their particle size and the matching relationship between the screening area and the lemons themselves, from the moment they enter the screening area.

[0034] Timing for gradient parameter adjustment: If the screening objective is to separate lemons into premium, high-quality, and first-grade lemons (80mm, 70-80mm, and 60-70mm respectively) based on particle size, the gradient parameter needs to be adjusted to create a linear or non-linear gradual change in the screening gap from the inlet to the outlet. Gradient changes can guide lemons of different sizes to separate between the two screening plates 4 according to particle size differences, achieving fine grading.

[0035] Please refer to Figure 2 and Figure 3In some embodiments of this application, the first screening base 2 is provided with a plurality of first locking holes 10 evenly distributed along the extension direction of the first guide groove 5 and communicating with them; correspondingly, the first adjusting slide body 6 is provided with a first assembly channel 7, and a first elastic element 8 (compression spring) is assembled in the first assembly channel 7. The free end of the first elastic element 8 is fixedly connected to a first pin 9, and the first pin 9 and each first locking hole 10 cooperate to achieve position locking. In specific operation, the operator presses the first pin 9 to overcome the elastic force of the first elastic element 8 and causes the first pin 9 to disengage from the current first locking hole 10. Then, the first adjusting slide body 6 can slide freely along the first guide groove 5. When the first adjusting slide body 6 moves to the target position, the first elastic element 8 releases its elastic force to push the first pin 9 into the corresponding first locking hole 10, forming a mechanical limiting structure, thereby achieving reliable locking of the first adjusting slide body 6 in the first guide groove 5.

[0036] Please refer to Figure 3 The first adjusting slide body 6 has two parallel first ear plates 11 extending vertically from one end. One end of the screening strip 4 is provided with a first hinge plate 12, which is rotatably mounted between the two ear plates 11 via a pin through corresponding hinge holes in the ear plates 11, forming a rotating pair connection. This allows for flexible rotation relative to the first adjusting slide body 6 within a certain angle range, providing freedom of motion for dynamic adjustment of the gap between the two screening strips 4.

[0037] Please refer to Figure 4 and Figure 5 In some embodiments of this application, the second screening base 3 is provided with a plurality of second locking holes 18 evenly distributed along the extension direction of the second guide groove 13 and communicating with them; correspondingly, the second adjusting slide body 14 is provided with a second assembly channel 15, and a second elastic member 16 is assembled in the second assembly channel 15. The free end of the second elastic member 16 is fixedly connected to a second pin 17, and the second pin 17 and each of the second locking holes 18 cooperate to achieve position locking. This structural design is consistent with the adjustment mechanism principle of the first screening base 2 and will not be described further.

[0038] Please refer to Figure 5 The second adjusting slide body 14 extends vertically from one end to two parallel second ear plates 19; the screening strip 4 is provided with a second hinge plate 20 at one end, and the second hinge plate 20 is rotatably installed between the two second ear plates 19 by a pin through the corresponding hinge holes of the second hinge plate 20 and the second ear plate 19, forming a rotating pair connection.

[0039] Please refer to Figure 6 and Figure 7In some embodiments of this application, the screening strip 4 adopts a double-segment telescopic structure, consisting of a first telescopic segment 21 and a second telescopic segment 22. One end of the first telescopic segment 21 has a telescopic guide cavity 23, and guide sliders 26 are symmetrically arranged on the inner wall of the telescopic guide cavity 23 to form a linear guiding structure. One end of the second telescopic segment 22 is embedded in the telescopic guide cavity 23, and a third guide groove 27, adapted to the guide slider 26, is formed along the axial direction on the outer surface of the second telescopic segment 22. During assembly, the guide slider 26 and the third guide groove 27 are in a sliding engagement state, ensuring that the second telescopic segment 22 slides smoothly along the axial direction within the telescopic guide cavity 23, realizing the adaptive length adjustment function of the screening strip 4, while ensuring the stability and reliability of the structure during the telescopic process.

[0040] Please refer to Figure 6 In some embodiments of this application, the cross-section of the screening strip 4 adopts an L-shaped bending structure design, and the whole is composed of a horizontal support section 24 and a vertical limiting section 25. The horizontal support section 24 extends along the screening direction and is used to support the lemons to be screened; the vertical limiting section 25 extends upward perpendicular to the horizontal support section 24 to form a limiting boundary, which can effectively prevent the lemons from shifting laterally or jumping during the screening process.

[0041] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A lemon grading and screening device, characterized in that, include: Rack (1); A first screening base (2) is installed on the frame (1), and the height of the first screening base (2) is H1; The second screening base (3) is installed on the frame (1) and the height of the second screening base (3) is H2, which is less than H1; Two screening plates (4) are arranged at an angle to each other. One end of each screening plate (4) is connected to the first screening base (2), and the other end of each screening plate (4) is connected to the second screening base (3). The spacing between the two screening plates (4) increases linearly from the first screening base (2) to the second screening base (3), and a screening area is formed between the two screening plates (4).

2. The lemon grading and screening device according to claim 1, characterized in that, The first screening base (2) is provided with a first guide groove (5), and two first adjusting slides (6) are slidably installed in the first guide groove (5). The first adjusting slides (6) can be locked in a preset position in the first guide groove (5). The second screening base (3) is provided with a second guide groove (13), and two second adjusting slides (14) are slidably installed in the second guide groove (13). The second adjusting slides (14) can be locked in a preset position in the second guide groove (13). The screening strip (4) is a telescopic structure with adjustable length. One end of the screening strip (4) is rotatably connected to the first adjusting slide (6), and the other end of the screening strip (4) is rotatably connected to the second adjusting slide (14).

3. The lemon grading and screening device according to claim 2, characterized in that, The first screening base (2) has a plurality of first locking holes (10) along the extension direction of the first guide groove (5), and the plurality of first locking holes (10) are all connected to the first guide groove (5); The first adjusting slide (6) is provided with a first assembly groove (7), and a first elastic element (8) is installed in the first assembly groove (7). The free end of the first elastic element (8) is connected to a first pin (9), and the first pin (9) can lock and cooperate with a plurality of first locking holes (10) respectively.

4. The lemon grading and screening device according to claim 3, characterized in that, Two opposing first ear plates (11) are provided at one end of the first adjusting slide (6); One end of the screening strip (4) is provided with a first hinge plate (12), which is rotatably mounted between the two first ear plates (11).

5. The lemon grading and screening device according to claim 2, characterized in that, The second screening base (3) has a plurality of second locking holes (18) along the extension direction of the second guide groove (13), and the plurality of second locking holes (18) are all connected to the second guide groove (13); The second adjusting slide (14) is provided with a second assembly channel (15), and a second elastic member (16) is installed in the second assembly channel (15). The free end of the second elastic member (16) is connected to a second pin (17), and the second pin (17) can lock and cooperate with a plurality of second locking holes (18) respectively.

6. The lemon grading and screening device according to claim 5, characterized in that, Two opposing second ear plates (19) are provided at one end of the second adjusting slide (14); One end of the screening strip (4) is provided with a second hinge plate (20), which is rotatably mounted between the two second ear plates (19).

7. The lemon grading and screening device according to any one of claims 2 to 6, characterized in that, The screening strip (4) includes a first telescopic segment (21) and a second telescopic segment (22); One end of the first telescopic segment (21) is provided with a telescopic guide cavity (23), and the inner wall of the telescopic guide cavity (23) is provided with a guide slider (26); One end of the second telescopic segment (22) extends into the telescopic guide cavity (23), and the second telescopic segment (22) is provided with a third guide groove (27) along the extension direction. The third guide groove (27) is guided and cooperates with the guide slider (26).

8. The lemon grading and screening device according to any one of claims 2 to 6, characterized in that, The cross-section of the screening strip (4) is an L-shaped bending structure, and the screening strip (4) includes a horizontal support section (24) and a vertical limiting section (25).

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