Rice grading and screening device with quick-change screen
By using the insertion and engagement of the insert plate and slot and the snap-fit structure of the limiting component, the problem of non-removable screens in traditional rice grading and screening devices is solved, enabling convenient replacement and maintenance of the screens and improving the versatility and grading accuracy of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SILK ROAD HUI SUPPLY CHAIN MANAGEMENT (YUNNAN) CO LTD
- Filing Date
- 2025-08-29
- Publication Date
- 2026-07-24
AI Technical Summary
Traditional rice grading and screening devices have non-removable screens, which makes it impossible to flexibly replace screens with different mesh sizes, affecting the equipment's versatility and grading accuracy. In addition, the screens are prone to clogging and difficult to clean, reducing production continuity.
By employing the insertion and connection of the insert plate and slot, the sliding guide of the positioning strip and positioning groove, and the quick-connect structure of the locking head and slot in the limiting component, the screen can be easily installed and removed. The modular design also facilitates thorough cleaning or individual replacement of the screen.
It enables flexible replacement and convenient maintenance of the screen, enhances the versatility and grading accuracy of the equipment, and reduces maintenance costs and operational risks.
Smart Images
Figure CN224542313U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rice processing technology, specifically to a rice grading and screening device with a quick-change screen. Background Technology
[0002] In the rice processing industry, grading and screening are crucial steps to ensure product quality. Traditional rice grading and screening devices mainly rely on vibrating screens to separate grains, and the core component, the screen mesh, needs to be configured with different mesh sizes according to the differences in grain size.
[0003] Chinese patent CN202323023099.0 discloses a rice grading and screening device. This device includes a screening frame with two screening components arranged vertically aligned inside. A drive component for synchronously driving the two screening components is located on the side of the screening frame. Each screening component includes four sliding rods slidably inserted into the side of the screening frame, with a frame fixedly mounted between the four rods. A spring passes through the middle of each rod and is positioned between the frame and the screening frame. A screen is hinged inside the frame, and a pair of electric push rods are hinged between the frame and the screen. An opening is provided on the side of the screening frame, and a discharge hopper is located inside the opening. The side end of the discharge hopper corresponds to the movable end of the screen, thus enabling the rice to be graded into three categories (large, small, and large). Furthermore, after rice grading, the rice on the screen can be easily discharged.
[0004] Despite its design advantages, this rice grading and screening equipment has the following drawbacks: the screens are not removable, preventing the equipment from flexibly changing screens of different mesh sizes based on rice grain size differences. This severely limits the equipment's adaptability to grading different varieties of rice with varying precision requirements, resulting in poor versatility. Furthermore, the screens are prone to clogging or damage due to material blockage and particle wear over long-term use. Because the screens are not removable, operators cannot thoroughly clean or replace them individually, leading to a continuous decline in grading accuracy and requiring frequent shutdowns for inefficient online cleaning, thus reducing production continuity. Therefore, we propose a rice grading and screening device with a quick-change screen. Utility Model Content
[0005] The purpose of this invention is to provide a rice grading and screening device with a quick-change screen to solve the problems mentioned in the background art.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A rice grading and screening device with quick-change screens, including:
[0008] The box has a hollow structure; multiple first discharge slots are opened on the front and rear walls of the box; multiple inclined slots are opened on the left end face of the box, and two adjacent slots are symmetrical, and positioning slots are opened at both ends of the slots; spring brackets are installed at the four corners of the bottom of the box; a vibration motor is installed on the top of the box.
[0009] Multiple screening components are installed in slots and inserted into the inner cavity of the box for rice grading and screening. Each screening component includes an insert plate that engages with the slot, with the right end of the insert plate abutting against the right side wall of the inner cavity of the box. Both ends of the insert plate are fixed with positioning strips that slide with positioning grooves. Screens are fixed inside the top openings of the insert plates. Two connecting blocks are fixed near the center of the right end of the insert plate, and slots are provided on the two opposite end faces of the two connecting blocks. A stop rod is fixed on one side of each connecting block. Both the connecting blocks and the stop rods pass through the right end face of the box.
[0010] Multiple limiting components are fixedly installed on the right end face of the housing and correspond horizontally to the insert plate. The multiple limiting components include a fixing seat fixedly connected to the right end face of the housing. The outer wall of the fixing seat has two mounting grooves near the middle. Both sides of the mounting grooves have fixing grooves for inserting connecting blocks. One side of the fixing grooves has a socket for inserting a push rod. Two protrusions are fixed on the right end face of the fixing seat. The socket extends into the protrusions. A first spring is fixed to the right end of the socket. The right end of the push rod abuts against the first spring and compresses the first spring. Limiting components are installed at the mounting grooves, and the limiting frame is used to fix the connecting block in the mounting groove.
[0011] As a preferred technical solution of this utility model, the bottom of the box is provided with a slope that is lower in the front and higher in the back, and a second discharge trough is provided at the front end of the slope, and the second discharge trough penetrates the front end face of the box.
[0012] In this configuration, the bottom slope of the box works in conjunction with the second discharge chute to guide the material to flow smoothly along the slope, reducing bottom accumulation and blockage, and improving discharge efficiency.
[0013] As a preferred technical solution of this utility model, a feed hopper is fixedly connected to the top rear side of the box body by bolts, and the cross-sectional shape of the feed hopper is funnel-shaped.
[0014] In this setup, the funnel-shaped feed hopper ensures uniform rice feeding, preventing localized accumulation that could affect the screening effect and guaranteeing feeding stability.
[0015] As a preferred technical solution of this utility model, the cross-sectional shape of the insert plate on the horizontal plane is U-shaped, and the size of the insert plate is adapted to the inner cavity size of the box.
[0016] In this design, the U-shaped insert plate fits snugly into the inner cavity of the box, ensuring a tight, wobbly installation and enhancing structural stability during screening.
[0017] As a preferred technical solution of this utility model, the limiting member includes a connecting rod located in the mounting groove and fixedly connected to the inner wall of the mounting groove, and a second spring is sleeved on the outside of the connecting rod; the limiting member also includes a slider slidably connected to the mounting groove, and each of the two opposite end faces of the two sliders is provided with a sliding hole slidably connected to the connecting rod, and the second spring abuts against the slider, and each of the two opposite end faces of the two sliders is fixed with a locking head, which is inserted into the fixing groove and engages with the locking groove.
[0018] As a preferred technical solution of this utility model, a lever is fixed at the center of the right end face of the slider, and the lever is cylindrical.
[0019] As a preferred technical solution of this utility model, the end of the card head is provided with a bevel, the angle of which is 30-45°;
[0020] As a preferred technical solution of this utility model, the slider and the clamp are integrally formed structures, and both the slider and the clamp are made of stainless steel.
[0021] Of these four features, the limiting component is linked to the clamp head via a spring, enabling the insertion plate to be automatically clamped and fixed, ensuring reliable connection and easy and quick installation and removal; the cylindrical lever facilitates manual operation, saving effort and simplifying the limit unlocking steps, thus improving operational efficiency; the beveled design of the clamp head allows for automatic guidance and clamping when the insertion plate is inserted, reducing the difficulty of installation alignment and speeding up assembly; the one-piece stainless steel slider and clamp head are robust and wear-resistant, extending service life and reducing maintenance frequency.
[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0023] 1. This utility model achieves convenient installation and removal of the screen by using the insertion and connection of the insert plate and the slot, the sliding guidance of the positioning strip and the positioning groove, and the quick-connect structure of the card head and the card slot in the limiting component. It solves the problem of limited mesh size replacement caused by the non-removable screen of traditional equipment. Different mesh sizes of screens can be flexibly replaced according to the rice variety and precision requirements, which enhances the versatility of the equipment.
[0024] 2. The screening component of this utility model adopts a modular design. The insert plate can be pulled out of the box as a whole, which makes it easy to thoroughly clean or replace the screen. This avoids the problem of inefficient online cleaning caused by the non-removable screen in traditional equipment. At the same time, when the screen is partially damaged, there is no need to replace the entire screening component. Only the corresponding screen or insert plate needs to be replaced, which reduces maintenance costs and consumable consumption.
[0025] 3. When the locking state of the insert plate is released, the elastic force of the first spring automatically pushes the stop rod and the insert plate to pop out horizontally, so that the insert plate naturally protrudes from the slot. The operator does not need to manually go into the box to drag or pry the insert plate, which reduces direct contact between the hands and the equipment parts, reduces the risk of being scratched or pinched during operation, and improves the operational safety of the screen replacement process. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0027] Figure 2 This is a cross-sectional view of the overall structure of this utility model;
[0028] Figure 3 This is a partial exploded structural diagram of the present invention;
[0029] Figure 4 This is a schematic diagram of the insert plate in this utility model;
[0030] Figure 5 This is a schematic diagram of the limiting component in this utility model;
[0031] Figure 6 This is a cross-sectional view of the limiting component in this utility model;
[0032] In the picture:
[0033] 1. Box body; 10. First discharge chute; 11. Second discharge chute; 12. Feed hopper; 13. Spring bracket; 14. Vibration motor; 15. Slot; 150. Positioning slot;
[0034] 2. Insert plate; 20. Screen; 21. Positioning strip; 22. Connecting block; 220. Slot; 23. Support rod;
[0035] 3. Limiting component; 30. Fixing base; 300. Mounting slot; 301. Fixing slot; 302. Insertion hole; 31. Protrusion; 32. First spring; 33. Slider; 34. Clamp; 35. Connecting rod; 36. Second spring; 37. Lever. Detailed Implementation
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0037] This embodiment provides a technical solution:
[0038] A rice grading and screening device with quick-change screens, including:
[0039] Please see Figures 1-2 As shown, the box body 1 has a hollow structure; multiple first discharge slots 10 are provided on the front and rear walls of the box body 1; multiple inclined slots 15 are provided on the left end face of the box body 1, and two adjacent slots 15 are symmetrical; positioning slots 150 are provided at both ends of the slots 15; spring brackets 13 are installed at the four corners of the bottom of the box body 1; and a vibration motor 14 is installed on the top of the box body 1.
[0040] In this embodiment, the bottom of the box 1 has a slope that is lower at the front and higher at the back. A second discharge chute 11 is provided at the front end of the slope and extends through the front end of the box 1. The bottom slope of the box 1 and the second discharge chute 11 guide residual materials to be discharged, preventing accumulation and blockage.
[0041] In this embodiment, a feed hopper 12 is bolted to the rear top of the housing 1, and the cross-sectional shape of the feed hopper 12 is funnel-shaped. The funnel-shaped design of the feed hopper 12 enables uniform feeding and avoids local overload damage to the screen 20.
[0042] It is understood that the spring bracket 13 in this embodiment, also known as a spring support, mainly consists of a coil spring, upper and lower flanges, and rubber damping pads. In this embodiment, it is mainly used to support the box 1 and adapt to vibration requirements: when the vibration motor 14 at the top of the box 1 is working, the spring bracket absorbs part of the vibration energy through the elastic deformation of the spring, ensuring that the box 1 can obtain sufficient vibration amplitude to achieve rice grading and screening, while reducing the transmission of vibration to the ground and reducing the overall noise during equipment operation; at the same time, the buffering effect of the spring can reduce the impact of vibration on the box 1 and various connecting parts, extending the service life of the equipment.
[0043] Please see Figures 2-4 As shown, multiple screening components are installed in slot 15 and inserted into the inner cavity of the box 1 for rice grading and screening. The screening components include an insert plate 2 that is inserted into slot 15, and the right end of the insert plate 2 abuts against the right side wall of the inner cavity of the box 1. Both ends of the insert plate 2 are fixed with positioning strips 21 that are slidably connected to positioning grooves 150. Screens 20 are fixed in the top opening of the insert plate 2. Two connecting blocks 22 are fixed near the middle of the right end of the insert plate 2. The two opposite end faces of the two connecting blocks 22 are provided with slots 220. A stop rod 23 is fixed on one side of the connecting block 22. Both the connecting block 22 and the stop rod 23 pass through the right end face of the box 1.
[0044] In this embodiment, the cross-sectional shape of the insert plate 2 on the horizontal plane is U-shaped, and the size of the insert plate 2 is adapted to the internal cavity size of the box body 1. The U-shaped structure of the insert plate 2 adapts to the internal cavity of the box body 1, enhancing the installation sealing performance.
[0045] Please see Figure 1 , Figure 5 and Figure 6 As shown, multiple limiting components 3 are fixedly installed on the right end face of the housing 1 and correspond to the insert plate 2 in a horizontal position. The multiple limiting components 3 include a fixing seat 30 fixedly connected to the right end face of the housing 1. The outer wall of the fixing seat 30 has two mounting grooves 300 near the middle. Both sides of the mounting groove 300 have fixing grooves 301 for inserting the connecting block 22. One side of the fixing groove 301 has a socket 302 for inserting the abutment rod 23. Two protrusions 31 are fixed on the right end face of the fixing seat 30. The socket 302 extends into the protrusions 31. A first spring 32 is fixed on the right end of the socket 302. The right end of the abutment rod 23 abuts against the first spring 32 and compresses the first spring 32. Limiting components are installed at the mounting groove 300, and the limiting frame is used to fix the connecting block 22 in the mounting groove 300. The limiting component includes a connecting rod 35 located within the mounting groove 300 and fixedly connected to the inner wall of the mounting groove 300. The connecting rod 35 is fixedly connected to the inner wall of the mounting groove 300 by bolts, and a second spring 36 is sleeved on the outside of the connecting rod 35. The limiting component also includes sliders 33 slidably connected to the mounting groove 300. Each of the two opposing end faces of the two sliders 33 has a sliding hole that is slidably connected to the connecting rod 35, and the second spring 36 abuts against the sliders 33. Each of the two opposing end faces of the two sliders 33 has a locking head 34 fixed thereon. The locking head 34 passes into the fixing groove 301 and engages with the locking groove 220. The connecting rod 35 and the second spring 36 of the limiting component push the sliders 33 to engage the locking head 34 with the locking groove 220, thereby achieving automatic locking of the insert plate 2 and ensuring reliable connection.
[0046] In this embodiment, a lever 37 is fixed at the center of the right end face of the slider 33. The lever 37 is cylindrical. The lever 37 of the slider 33 facilitates manual unlocking, and the cylindrical design improves operating comfort, simplifies the limit adjustment steps, and reduces manual labor.
[0047] In this embodiment, a bevel is provided at the end of the clamping head 34, with an angle of 30-45°. The preferred angle of the bevel is 35°. This design reduces the difficulty of alignment when inserting the insert plate 2, enables tool-free quick clamping, and shortens assembly time.
[0048] In this embodiment, the slider 33 and the chuck 34 are integrally formed structures, and both are made of stainless steel. The integral molding of the slider 33 and chuck 34 from stainless steel enhances structural strength and wear resistance, adapts to humid processing environments, and extends service life.
[0049] Understandably, in this embodiment, the first spring 32 is made of stainless steel wire, and its working stroke matches the ejection requirements of the insert plate 2. The spring force is designed to push the insert plate 2 smoothly out of the slot 15, and the surface is treated with rust prevention to cope with the influence of moisture in the processing environment. At the same time, washers are added to both ends of the first spring 32, and it is fixed to the inner wall of the insertion hole 302 with bolts to reduce positional displacement during vibration.
[0050] Furthermore, in this embodiment, the protrusion 31 and the fixed seat 30 are fixed by welding, and the contact surface is firmly welded and the weld is complete. At the same time, after the protrusion 31 is installed, it maintains good perpendicularity and flatness with the fixed seat 30, ensuring that the insertion process of the abutment 23 is smooth and reducing friction loss.
[0051] It should be added that, in this embodiment, the fixing base 30 is fixed to the right end face of the housing 1 by bolts, and the bolt connection adopts anti-loosening measures to ensure the connection is stable after long-term vibration. This installation method is reliable and stable, ensuring the long-term stable use of the fixing base 30.
[0052] It is worth noting that the vibration motor 14 involved in this embodiment is a conventional technology and will not be described in detail here.
[0053] The following steps are included when disassembling the insert plate 2:
[0054] First, the user manually moves the lever 37 on the right end of the slider 33, causing the two sliders 33 to slide inward along the connecting rod 35 against the elastic force of the second spring 36, which drives the clamp 34 to disengage from the slot 220, thus releasing the clamp 34 from the connecting block 22.
[0055] Subsequently, the first spring 32 resets and releases its elastic force, pushing the abutment rod 23 to cause the insert plate 2 to pop out to the left along the positioning groove 150, so that part of the insert plate 2 protrudes from the slot 15;
[0056] Then, the user can directly grasp the protruding insert 2 part and pull it out completely from the slot 15 to complete the disassembly process of insert 2;
[0057] The installation of insert 2 includes the following steps:
[0058] First, the user needs to align the positioning strip 21 of the insert plate 2 with the positioning groove 150 of the slot 15 on the left end face of the box 1;
[0059] Subsequently, the user pushes the insert plate 2 into the inner cavity of the box 1 along the inclined direction of the slot 15. During the pushing process, the connecting block 22 and the push rod 23 at the right end of the insert plate 2 gradually pass through the right end face of the box 1 and are inserted into the fixing slot 301 and the insertion hole 302 of the fixing seat 30. The right end of the push rod 23 presses against the first spring 32 and compresses and stores its force.
[0060] Then, during the insertion process, the connecting block 22 contacts the inclined surface of the locking head 34 of the limiting member, pushing the slider 33 to slide along the connecting rod 35 into the mounting groove 300 and compressing the second spring 36. When the connecting block 22 is fully inserted into the fixing groove 301, the locking groove 220 corresponds to the position of the locking head 34. The second spring 36 resets and pushes the slider 33 to drive the locking head 34 into the locking groove 220, completing the automatic locking and fixing of the insert plate 2. At this time, the right end of the insert plate 2 abuts against the right side wall of the inner cavity of the box 1 to ensure stable installation.
[0061] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A rice grading and screening device with a quick-change screen, characterized in that, include: The box (1) has a hollow structure; multiple first discharge slots (10) are provided on the front and rear walls of the box (1); multiple inclined slots (15) are provided on the left end face of the box (1), and two adjacent slots (15) are symmetrical. Positioning slots (150) are provided at both ends of the slots (15); spring brackets (13) are installed at the four corners of the bottom of the box (1); a vibration motor (14) is installed on the top of the box (1). Multiple screening components are installed in slots (15) and inserted into the inner cavity of the box (1) for rice grading and screening; the screening components include insert plates (2) that are inserted into slots (15), and the right end of the insert plates (2) abuts against the right side wall of the inner cavity of the box (1). Both ends of the insert plates (2) are fixed with positioning strips (21) that are slidably connected to positioning grooves (150); screens (20) are fixed in the top opening of the insert plates (2); two connecting blocks (22) are fixed near the middle of the right end of the insert plates (2), and slots (220) are opened on the two opposite end faces of the two connecting blocks (22); a stop rod (23) is fixed on one side of the connecting blocks (22); the connecting blocks (22) and the stop rod (23) pass through the right end face of the box (1); Multiple limiting components (3) are fixedly installed on the right end face of the housing (1) and correspond to the insert plate (2) in a horizontal position; the multiple limiting components (3) include a fixing seat (30) fixedly connected to the right end face of the housing (1), and two mounting grooves (300) are opened near the middle of the outer wall of the fixing seat (30). Fixing grooves (301) for the connecting block (22) to be inserted are opened on both sides of the mounting grooves (300), and a stop bar is opened on one side of the fixing grooves (301). (23) Insertion hole (302); two protrusions (31) are fixed on the right end face of the fixing base (30), the insertion hole (302) extends into the protrusions (31), the right end of the insertion hole (302) is fixed with a first spring (32), and the right end of the abutment (23) abuts against the first spring (32) and makes the first spring (32) compressed; a limiting member is installed at the mounting groove (300), and the limiting bracket is used to fix the connecting block (22) in the mounting groove (300).
2. The rice grading and screening device with a quick-change screen as described in claim 1, characterized in that: The bottom of the box (1) is provided with a slope that is lower in the front and higher in the back. A second discharge chute (11) is provided at the front end of the slope and the second discharge chute (11) penetrates the front end of the box (1).
3. The rice grading and screening device with a quick-change screen as described in claim 1, characterized in that: The top rear side of the box (1) is fixedly connected to the feed hopper (12) by bolts, and the cross-sectional shape of the feed hopper (12) is funnel-shaped.
4. The rice grading and screening device with a quick-change screen as described in claim 1, characterized in that: The cross-sectional shape of the insert plate (2) on the horizontal plane is U-shaped, and the size of the insert plate (2) is adapted to the internal cavity size of the box (1).
5. The rice grading and screening device with a quick-change screen as described in claim 1, characterized in that: The limiting component includes a connecting rod (35) located in the mounting groove (300) and fixedly connected to the inner wall of the mounting groove (300), and a second spring (36) is sleeved on the outside of the connecting rod (35); the limiting component also includes a slider (33) slidably connected to the mounting groove (300), and each of the two opposing end faces of the two sliders (33) is provided with a sliding hole slidably connected to the connecting rod (35), and the second spring (36) abuts against the slider (33), and each of the two opposing end faces of the two sliders (33) is fixed with a locking head (34), and the locking head (34) is inserted into the fixing groove (301) and engaged with the locking groove (220).
6. The rice grading and screening device with a quick-change screen according to claim 5, characterized in that: A lever (37) is fixed at the center of the right end face of the slider (33), and the lever (37) is cylindrical.
7. The rice grading and screening device with a quick-change screen according to claim 5, characterized in that: The end of the card head (34) is provided with a bevel, the angle of which is 30-45°.
8. The rice grading and screening device with a quick-change screen according to claim 5, characterized in that: The slider (33) and the clamp (34) are integrally formed structures, and both the slider (33) and the clamp (34) are made of stainless steel.