A rice grading and screening device with quick-change screens

Abstract

This utility model discloses a rice grading and screening device with a quickly replaceable screen, belonging to the technical field of grading and screening devices. The utility model includes a frame, a vibration mechanism at the top of the frame, a screening box at the top of the frame, a screening screen assembly inside the screening box, and a fixing mechanism on one side of the frame. The fixing mechanism includes a fixing plate and a limiting component on one side of the screening box. This utility model achieves initial positioning of the screening screen assembly by horizontally pushing it in. Subsequently, the fixing plate presses down, causing the limiting rod to insert into the limiting slots of each component, achieving precise alignment and pre-fixing. Finally, installation is completed by tightening only two fixing bolts, greatly simplifying the tedious operation of aligning holes one by one and tightening multiple bolts, significantly shortening the screen replacement time, and effectively improving the efficiency of equipment maintenance and production operations.

Description

Technical Field

[0001] This utility model belongs to the technical field of grading and screening devices, and in particular relates to a rice grading and screening device with a quick-change screen. Background Technology

[0002] Rice grading and screening devices are key equipment in the rice processing industry. Their function is to grade rice according to the size of rice grains, separating whole rice, broken rice, and unqualified impurities, thereby improving the quality grade and commercial value of rice. Such devices usually use multiple layers of screens with different apertures to achieve efficient screening of rice under the action of a vibration mechanism. In the existing technology, the screen components are usually directly fixed to the screening box with a large number of bolts. When it is necessary to replace the screen to adjust the grading specifications or to perform maintenance, the operator must disassemble and tighten multiple sets of bolts one by one.

[0003] Existing rice grading and screening devices with screen replacement technology still have some problems during use. For example, the disassembly and installation process is cumbersome and time-consuming, resulting in low screen replacement efficiency and seriously affecting production continuity. Secondly, a large number of bolt connection points are prone to loosening under continuous vibration conditions, requiring frequent inspection and tightening, which increases the burden and cost of equipment maintenance.

[0004] To address this issue, we provide a rice grading and screening device with a quickly replaceable screen. Utility Model Content

[0005] The purpose of this invention is to provide a rice grading and screening device with a quick-change screen. Through the structural cooperation of the fixing mechanism and the pad mechanism, it solves the problems of existing rice grading and screening devices, which have cumbersome and time-consuming disassembly and installation processes, are prone to loosening under continuous vibration, and require frequent inspection and tightening.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model is a rice grading and screening device with a quick-change screen, including a frame, a vibration mechanism at the top of the frame, a screening box at the top of the frame, a screening screen assembly inside the screening box, a fixing mechanism on one side of the frame, the fixing mechanism including a fixing plate on one side of the screening box, a limiting component on one side of the screening box, and a fixing bolt on one side of the screening box, and a pad mechanism on one side of the screening box, the pad mechanism including a first pad assembly on one side of the screening box, a second pad assembly on both sides of the fixing plate, and an interlayer pad inside the fixing plate.

[0008] The present invention is further configured such that the screening mesh assembly includes a metal frame disposed inside the screening box, and a screening mesh fixedly connected inside the metal frame.

[0009] The present invention is further configured such that a support beam is fixedly connected inside the screening box, and a support groove is provided inside the screening box.

[0010] The present invention is further configured such that the limiting component includes a limiting block fixedly connected to one side of the screening box, and a limiting rod inserted inside the limiting block, wherein both the fixing plate and the limiting block are provided with fixing through holes adapted to the fixing bolts.

[0011] The present invention is further configured such that the fixing plate is U-shaped, and the interlayer pad is located between the fixing plate and the limiting component.

[0012] The present invention is further configured such that the first pad assembly includes a first groove formed on one side of the limiting assembly, and a first annular pad placed inside the first groove.

[0013] The present invention is further configured such that the second pad assembly includes a second groove formed on both sides of the fixing plate, and a second annular pad placed inside the second groove.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model achieves initial positioning of the screening mesh assembly by horizontally pushing it in. Then, the fixing plate presses down to drive the limiting rod to insert into the limiting through groove of each component, achieving precise alignment and pre-fixation. Finally, only two fixing bolts need to be tightened to complete the installation. This greatly simplifies the tedious operation of aligning holes one by one and tightening multiple bolts, significantly shortens the replacement time of the screening mesh, and effectively improves the efficiency of equipment maintenance and production operations.

[0016] 2. This utility model incorporates a pad mechanism consisting of interlayer pads, a first annular pad, and a second annular pad at the key stress and connection interfaces of the fixing mechanism. When the equipment vibrates, these elastic pads form an effective buffer area between the fixing plate and the limiting block, as well as at the connection of the fixing bolts. Through the deformation of these elastic pads, vibration energy is continuously absorbed and dispersed, effectively suppressing the direct transmission of vibration to the fastening point and preventing the loosening of the fixing bolts due to long-term vibration. This significantly improves the reliability of the fixed connection, reduces the maintenance frequency, and effectively ensures the long-term stable operation of the screening device under continuous vibration conditions.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional diagram of a rice grading and screening device with a quick-change screen.

[0020] Figure 2 This is a structural diagram of the sieving screen assembly in a rice grading and screening device with a quick-change sieve.

[0021] Figure 3 This is a diagram showing the effect of removing the sieve assembly in a rice grading and screening device with a quick-change sieve.

[0022] Figure 4 This is a structural diagram of the fixing mechanism in a rice grading and screening device with a quick-change screen.

[0023] Figure 5 This is a structural diagram of the pad block mechanism in a rice grading and screening device with a quick-change screen.

[0024] In the attached diagram: 1. Frame; 2. Vibration mechanism; 3. Screening box; 4. Screening mesh assembly; 41. Metal frame; 42. Screening mesh; 5. Fixing mechanism; 51. Fixing plate; 52. Limiting assembly; 521. Limiting block; 522. Limiting rod; 53. Fixing bolt; 6. Pad block mechanism; 61. First pad block assembly; 611. First groove; 612. First annular pad; 62. Second pad block assembly; 621. Second groove; 622. Second annular pad; 63. Interlayer pad block; 7. Support beam; 8. Support groove; 9. Fixing through hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments. Example 1

[0026] Please see Figures 1-5This utility model is a rice grading and screening device with a quick-change screen, including a frame 1, a vibration mechanism 2 at the top of the frame 1, a screening box 3 at the top of the frame 1, a screening screen assembly 4 inside the screening box 3, a fixing mechanism 5 on one side of the frame 1, the fixing mechanism 5 including a fixing plate 51 on one side of the screening box 3, a limiting assembly 52 on one side of the screening box 3, and a fixing bolt 53 on one side of the screening box 3, and a pad mechanism 6 on one side of the screening box 3, the pad mechanism 6 including a first pad assembly 61 on one side of the screening box 3, a second pad assembly 62 on both sides of the fixing plate 51, and an interlayer pad 63 inside the fixing plate 51.

[0027] Specifically, the fixing mechanism 5 is used to quickly position and fix the screening mesh assembly 4. During replacement, the operator first pushes the screening mesh assembly 4, integrated on the metal frame 41, horizontally into place along the support groove 8 on the side of the screening box 3. Then, the U-shaped fixing plate 51 is fastened from top to bottom, causing the inner limiting rod 522 to be inserted downwards into the limiting block 521, the interlayer pad 63, and the corresponding limiting through grooves pre-set on the metal frame 41. This insertion action completes the initial lateral and longitudinal limiting of the screening mesh assembly 4. Finally, only... The fixing bolts 53 are screwed into the fixing through holes 9 aligned with the fixing plate 51 and the limiting block 521 to complete the fastening work. The function of the pad block mechanism 6 is to buffer and dampen vibration. When the device vibrates during operation, the mechanism can effectively absorb and disperse vibration energy and prevent the fastening points from loosening due to continuous vibration. The fixing mechanism 5 and the pad block mechanism 6 simplify the cumbersome process of disassembling a large number of bolts to only operating two bolts, which greatly improves the efficiency of replacing the screen 42 and ensures the stability and reliability of the equipment under long-term vibration conditions. Example 2

[0028] Please see Figures 1-5Based on Embodiment 1, the screening mesh assembly 4 includes a metal frame 41 disposed inside the screening box 3, and a screening mesh 42 fixedly connected inside the metal frame 41. There are two screening mesh assemblies 4. A support beam 7 is fixedly connected inside the screening box 3. A support groove 8 is provided inside the screening box 3, the height of which is adapted to the height of the metal frame 41. The side of the support groove 8 facing the fixing plate 51 is open. The limiting assembly 52 includes a limiting block 521 fixedly connected to one side of the screening box 3, and a limiting rod 522 inserted into the limiting block 521. Both the fixing plate 51 and the limiting block 521 have fixing through holes 9 adapted to the fixing bolts 53. The limiting block 521, the interlayer spacer 63, and the metal frame... The interior of each of the 41 is provided with a limiting through groove that matches the limiting rod 522. The top of the limiting rod 522 is fixedly connected to the top of the inner wall of the fixing plate 51. The limiting block 521 is designed to be discontinuous, with a gap in the middle for the metal frame 41 to pass through. The fixing plate 51 is U-shaped. The interlayer pad 63 is located between the fixing plate 51 and the limiting component 52. The first pad component 61 includes a first groove 611 opened on one side of the limiting component 52 and a first annular pad 612 placed inside the first groove 611. The first annular pad 612 is located at the fixing bolt 53. The second pad component 62 includes a second groove 621 opened on both sides of the fixing plate 51 and a second annular pad 622 placed inside the second groove 621.

[0029] Specifically: The screening mesh assembly 4 provides a fixed support for the central screening mesh 42 via the metal frame 41, facilitating its fixation. The support beam 7 supports the bottom of the screening mesh 42, preventing it from collapsing. The support groove 8 allows the metal frame 41 to be inserted into the inner wall of the screening box 3, improving the installation effect of the screening mesh assembly 4. The limiting component 52 ensures that after the screening mesh assembly 4 is pushed into the screening box 3, the fixing plate 51 moves downwards. The movable limiting rod 522 is inserted into the limiting through groove, and then the fixing bolt 53 is screwed into the corresponding fixing through hole 9, thus completing the fixing of the screening screen assembly 4. By setting the interlayer spacer 63, a buffer area is formed between the fixing plate 51 and the limiting block 521 to reduce the impact of vibration on the fixing mechanism 5. By setting the first spacer assembly 61, a buffer area is formed between the limiting block 521 and the fixing plate 51. By setting the second spacer, a buffer area is formed between the fixing bolt 53 and the fixing plate 51.

[0030] The working principle of this utility model is as follows: When it is necessary to install the screening mesh assembly 4, the operator first pushes the metal frame 41 with the screening mesh 42 horizontally into the screening box 3 from the side and the gap between the limiting block 521, so that it slides into the screening box 3 along the support groove 8 until the end of the metal frame 41 contacts the inner side of the support groove 8. Then, the U-shaped fixing plate 51 is fastened from top to bottom, so that the limiting rod 522 on the inner side of the fixing plate 51 moves downward synchronously and passes through the interlayer pad 63, the limiting block 521 and the limiting through groove inside the metal frame 41 in sequence. Finally, the fixing bolt 53 is screwed into the corresponding fixing through hole 9 with a tool, thus completing the fixing of the screening mesh 42.

[0031] When it is necessary to replace or maintain the screening screen 42, the operation process is the reverse of the installation. First, use a tool to loosen and remove the fixing bolts 53. Then, directly pull the fixing plate 51 upward, which will drive the limiting rod 522 to completely exit from the limiting through groove of the limiting block 521, the metal frame 41 and the interlayer pad 63. The operator can then easily pull the entire screening screen assembly 4 horizontally out of the support groove 8 of the screening box 3, thereby completing the quick disassembly.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A rice grading and screening device with a quick-change screen, comprising a frame (1), characterized in that: The frame (1) is provided with a vibration mechanism (2) at the top, and a screening box (3) is provided at the top of the frame (1). A screening mesh assembly (4) is provided inside the screening box (3). A fixing mechanism (5) is provided on one side of the frame (1). The fixing mechanism (5) includes a fixing plate (51) provided on one side of the screening box (3), a limiting component (52) provided on one side of the screening box (3), and a fixing bolt (53) provided on one side of the screening box (3). A pad mechanism (6) is provided on one side of the screening box (3). The pad mechanism (6) includes a first pad assembly (61) provided on one side of the screening box (3), a second pad assembly (62) provided on both sides of the fixed plate (51), and an interlayer pad (63) provided inside the fixed plate (51).

2. The rice grading and screening device with a quickly replaceable screen as described in claim 1, characterized in that: The screening mesh assembly (4) includes a metal frame (41) disposed inside the screening box (3) and a screening mesh (42) fixedly connected inside the metal frame (41).

3. The rice grading and screening device with a quickly replaceable screen as described in claim 1, characterized in that: The screening box (3) is fixedly connected to a support beam (7), and the screening box (3) is provided with a support groove (8).

4. The rice grading and screening device with a quickly replaceable screen as described in claim 1, characterized in that: The limiting component (52) includes a limiting block (521) fixedly connected to one side of the screening box (3) and a limiting rod (522) inserted into the limiting block (521). The fixing plate (51) and the limiting block (521) are both provided with fixing through holes (9) that are compatible with the fixing bolts (53).

5. A rice grading and screening device with a quickly replaceable screen as described in claim 1, characterized in that: The fixing plate (51) is U-shaped, and the interlayer pad (63) is located between the fixing plate (51) and the limiting component (52).

6. A rice grading and screening device with a quickly replaceable screen as described in claim 1, characterized in that: The first pad assembly (61) includes a first groove (611) formed on one side of the limiting assembly (52) and a first annular pad (612) placed inside the first groove (611).

7. A rice grading and screening device with a quickly replaceable screen as described in claim 1, characterized in that: The second pad assembly (62) includes a second groove (621) formed on both sides of the fixing plate (51) and a second annular pad (622) placed inside the second groove (621).

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