Material screen multi-fold discharge channel

Abstract

This utility model provides a multi-fold discharge channel for a material screening system, belonging to the field of material screening and transportation. It includes a multi-fold discharge pipeline comprising a first pipe, a second pipe, and a bent pipe. The upper inner wall of the bent pipe is equipped with a progressive weakening mechanism, which includes two mounting frames. Multiple rotating shafts and frames on the rotating shafts are arranged between the two mounting frames. The frames are linearly distributed at equal intervals, and each frame contains an elastic plate. This utility model enables material transportation at the material screening outlet while reducing the intensity of collisions at the channel bends, achieving "soft contact," effectively reducing the broken rice rate, ensuring product quality, meeting qualification standards, and effectively improving production efficiency. It has a simple structure, is easy to install, and has low cost, possessing practical value and market potential.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of material screening and transportation, specifically a multi-fold discharge channel for material screening. Background Technology

[0002] Material sieves are mechanical devices that use sieve surfaces (such as metal mesh, perforated plates, etc.) to classify and screen granular materials. Through vibration, rotation, or fixed tilting of the sieve surface, materials of different sizes and shapes are separated according to particle size, achieving material grading, impurity removal, or purification. The core principle is to utilize the difference between the particle size and the sieve aperture size, combined with mechanical movement, to allow particles that meet the sieve aperture requirements to pass through the sieve surface, while larger particles are retained. In the rice processing process, it is mainly used for precise screening to control the particle size of the finished product and meet food standards (such as the "broken rice rate" and "impurity rate" indicators for rice).

[0003] A multi-fold discharge channel needs to be installed at the discharge port of the material screen. Its core feature is that the channel is laid out in a zigzag shape (multiple bends). It is usually made of welded or bolted metal plates. One end of the channel is connected to the discharge end of the screen cylinder, and the other end extends to different discharge ports outside the equipment. It is mainly used to guide materials of different specifications after screening (such as grain particles of different sizes) to the corresponding outlets in layers to achieve accurate graded discharge of materials.

[0004] However, the multi-fold design means that during material transport, the upper metal plate at the bends in the multi-fold channel will make "hard contact" with the material, causing a certain degree of impact. This is especially significant for fragile particles such as rice and peanuts. For example, when polished rice passes through the bends, it will collide with the upper metal plate of the channel, potentially increasing the broken rice rate from 0.8% to 1.5%, exceeding the national standard requirement (≤1.0%). This results in the product failing quality inspection and becoming a defective product, causing economic losses. Currently, the main way to reduce the broken rice rate is to reduce the material conveying speed. However, this overall reduction in material conveying speed leads to a decrease in the throughput per unit time, significantly reducing production efficiency. Utility Model Content

[0005] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. Specifically, this utility model provides a multi-fold discharge channel for a material sieve, which solves the technical problem mentioned in the background art where, during material transportation, the multi-fold design of the channel makes it easy for the material to collide with the metal plate on the channel at the bends, resulting in an increased broken rice rate.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A multi-fold discharge channel for a material screen includes a multi-fold discharge pipeline. The multi-fold discharge pipeline includes a first pipe, a second pipe, and a bent pipe between the first and second pipes, and the pipes are detachably connected. A progressive weakening mechanism is provided on the upper inner wall of the bent pipe. The progressive weakening mechanism includes two parallel mounting frames located on the upper inner wall of the bent pipe. Multiple rotating shafts and frames on the rotating shafts are provided between the two mounting frames. The frames are linearly distributed at equal intervals, and each frame contains an elastic plate.

[0007] Furthermore, each of the rotating shafts is provided with a torsion spring at both ends, and the lever arms at both ends of the torsion spring are respectively inserted into the round holes of the corresponding frame and mounting bracket.

[0008] Furthermore, the stiffness coefficient of the torsion spring gradually increases from high to low along the direction of the mounting bracket.

[0009] Furthermore, each frame and its corresponding elastic plate are detachably connected, and each frame has an abutment frame located at the center of its back side.

[0010] Furthermore, each of the elastic plates has a wave-shaped anti-slip texture on its contact surface with the material.

[0011] Furthermore, a limiting component is provided on one side near each of the abutment frames. The limiting component includes a horizontal support, the two ends of which are connected to the mounting bracket by screws. A sliding groove is provided in the middle of the horizontal support, and a limiting block is slidably connected to the sliding groove. The limiting block can press against the abutment frame.

[0012] Furthermore, a locking bolt and a locking nut are provided at the connection position between the limiting block and the slide groove, and the locking bolt and the locking nut are threaded together.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention utilizes a multi-fold discharge pipe, mounting frame, frame, elastic plate, rotating shaft, and torsion spring to transport materials at the material screening outlet. This reduces the intensity of collisions at channel bends, achieving "soft contact" and effectively lowering the broken rice rate, ensuring product quality and meeting standards. Furthermore, the torsion spring's stiffness coefficient gradually increases along the mounting frame, meaning the elastic plate, which first contacts the material, has the largest swing amplitude, further reducing the collision intensity between the elastic plate and the material. With the elastic plates evenly distributed along the material flow direction, the material is gradually slowed down, further weakening the collision intensity and ensuring quality. Unlike traditional structures that reduce the overall material transport speed to lower the broken rice rate, this invention effectively improves production efficiency. It features a simple structure, easy installation, low cost, and possesses practical value and market potential.

[0014] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is an exploded view of the overall structure of this utility model; Figure 3 This is an exploded view of the step-by-step weakening mechanism of this utility model. Figure 4 For the present utility model Figure 3 Enlarged structural diagram of area A; Figure 5 This is a schematic diagram of the elastic plate and frame structure of this utility model; Figure 6 This is a schematic diagram of the distribution of the progressive weakening mechanism of this utility model.

[0016] In the diagram: 1. Multi-fold discharge pipe; 11. First pipe; 12. Second pipe; 13. Bending pipe; 2. Gradual weakening mechanism; 21. Mounting bracket; 22. Frame; 221. Contact bracket; 23. Elastic plate; 231. Anti-slip texture; 24. Rotating shaft; 25. Torsion spring; 3. Limiting component; 31. Horizontal support; 32. Slide groove; 33. Limiting block; 34. Locking bolt; 35. Locking nut. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Please refer to the appendix carefully. Figure 1-6 A multi-fold discharge channel for material screening includes a multi-fold discharge pipe 1, which includes a first pipe 11, a second pipe 12, and a bent pipe 13 between the first pipe 11 and the second pipe 12. The pipes are detachably connected. A progressive weakening mechanism 2 is provided on the upper inner wall of the bent pipe 13. The progressive weakening mechanism 2 includes two parallel mounting frames 21 located on the upper inner wall of the bent pipe 13. A plurality of rotating shafts 24 and frames 22 on the rotating shafts 24 are provided between the two mounting frames 21. The frames 22 are linearly distributed at equal intervals, and each frame 22 is provided with an elastic plate 23.

[0021] The above structure enables material transport at the material screening outlet while reducing the intensity of collisions at channel bends, achieving "soft contact" and effectively lowering the broken rice rate. This ensures product quality and meets qualification standards. Furthermore, it allows for gradual material deceleration, further weakening collision intensity and guaranteeing quality. Unlike traditional structures that reduce the overall material transport speed to lower the broken rice rate, this structure effectively improves production efficiency. It is simple in structure, easy to install, and low in cost, possessing practical value and market potential.

[0022] The specific operation is as follows: After the material is discharged from the outlet of the material screen, it will pass through the first pipe 11, the bent pipe 13 and the second pipe 12 in sequence. At the position of the bent pipe 13, the material will continuously be flushed towards the upper side of the inner wall of the bent pipe 13. At this time, the uppermost elastic plate 23 bears the force of the material and makes "soft contact". Then the frame 22 deflects to the side of the mounting frame 21, and the torsion spring 25 is rotated to relieve the force and reduce the flow rate of the material in the bent pipe 13. As the material continues to flow in the bent pipe 13, it will come into contact with the subsequent elastic plates 23 one by one to slow down, reduce the impact force, avoid material damage, and effectively reduce the broken rice rate.

[0023] Please refer to the appendix carefully. Figure 3 and attached Figure 4A limiting component 3 is provided on one side near each of the abutment frames 221. The limiting component 3 includes a transverse support 31. The two ends of the transverse support 31 are connected to the mounting frame 21 by screws. A sliding groove 32 is provided in the middle of the transverse support 31. The sliding groove 32 is slidably connected to a limiting block 33. The limiting block 33 can abut against the abutment frame 221. By changing the position of the limiting block 33 in the sliding groove 32, the maximum degree of deflection of the frame 22 during the deflection process is limited, so that each elastic plate 23 can better cooperate to bear the scouring of the material, and also avoid damage to the torsion spring 25 due to excessive deflection. A locking bolt 34 and a locking nut 35 are provided at the connection position between the limiting block 33 and the sliding groove 32. The locking bolt 34 and the locking nut 35 are threaded together. Through the cooperation between the locking bolt 34 and the locking nut 35, the position of the limiting block 33 in the sliding groove 32 is locked and positioned.

[0024] Please refer to the appendix carefully. Figure 3 and attached Figure 5 Each of the rotating shafts 24 is provided with a torsion spring 25 at both ends, and the lever arms of the two ends of the torsion spring 25 are respectively inserted into the circular holes of the corresponding frame 22 and mounting bracket 21. The stiffness coefficient of the torsion spring 25 gradually increases from high to low along the direction of the mounting bracket 21. Through the torsion spring 25, the force can be oscillated and unloaded when bearing the force of the material. Under the premise that the elastic plate 23 weakens the impact force by its own deformation, the impact force of the material is further reduced. Since the stiffness coefficient of the torsion spring 25 gradually increases from high to low, the uppermost elastic plate 23 is the easiest to deflect, and the degree of deflection is large, which can reduce the impact force of the material. The reverse force exerted by the elastic plate 23 on the material, due to its large deflection, provides space for the material to contact the subsequent elastic plate 23, reducing interference from the previous elastic plate 23, and making the material contact the elastic plate 23 more comprehensive, thus improving utilization. Each frame 22 and the corresponding elastic plate 23 are detachably connected, and each frame 22 has an abutment frame 221 at the middle of its back. Each elastic plate 23 has a wave-shaped anti-slip texture 231 on its contact surface with the material. The anti-slip texture 231 decelerates the material when it is scouring the elastic plate 23.

[0025] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A multi-fold discharge channel for a material screen, comprising a multi-fold discharge pipe (1), wherein the multi-fold discharge pipe (1) comprises a first pipe (11), a second pipe (12), and a bent pipe (13) between the first pipe (11) and the second pipe (12), and the pipes are detachably connected, characterized in that, The upper inner wall of the bent pipe (13) is provided with a step-by-step weakening mechanism (2). The step-by-step weakening mechanism (2) includes two parallel mounting brackets (21). The mounting brackets (21) are located on the upper inner wall of the bent pipe (13). Between the two mounting brackets (21) are multiple rotating shafts (24) and frames (22) on the rotating shafts (24). The frames (22) are linearly distributed at equal intervals, and each frame (22) is provided with an elastic plate (23).

2. The multi-fold discharge channel for a material screen according to claim 1, characterized in that, Each of the rotating shafts (24) is provided with a torsion spring (25) at both ends, and the lever arms at both ends of the torsion spring (25) are respectively inserted into the round holes of the corresponding frame (22) and mounting bracket (21).

3. The multi-fold discharge channel for a material screen according to claim 2, characterized in that, The stiffness coefficient of the torsion spring (25) gradually increases from high to low along the direction of the mounting bracket (21).

4. The multi-fold discharge channel for a material screen according to claim 2, characterized in that, Each frame (22) and its corresponding elastic plate (23) are detachably connected, and each frame (22) has an abutment frame (221) at the middle of its back side.

5. The multi-fold discharge channel for a material screen according to claim 4, characterized in that, Each of the elastic plates (23) has a wave-structured anti-slip texture (231) on the contact surface with the material.

6. The multi-fold discharge channel for a material screen according to claim 4, characterized in that, A limiting component (3) is provided on one side near each of the abutment brackets (221). The limiting component (3) includes a transverse support (31). The two ends of the transverse support (31) are connected to the mounting bracket (21) by screws. A sliding groove (32) is provided in the middle of the transverse support (31). The sliding groove (32) is slidably connected to a limiting block (33). The limiting block (33) can press against the abutment bracket (221).

7. The multi-fold discharge channel for a material screen according to claim 6, characterized in that, The connection between the limiting block (33) and the slide (32) is provided with a locking bolt (34) and a locking nut (35), and the locking bolt (34) and the locking nut (35) are threaded together.

Images