A low-noise rice screening device

Abstract

This utility model relates to the field of rice processing equipment, specifically a low-noise rice screening device. The device includes a body with a screening chamber inside. A vibrator is installed within the screening chamber. A feed inlet is located at the top of the body. A vibrating rod is connected to the screening chamber via a vibration spring. The vibrating rod is perpendicular to the bottom wall of the screening chamber. A screen channel is wound around the vibrating rod via a fixed rod. Screen holes are formed in the screen channel. The side of the screen channel away from the vibrating rod does not contact the inner wall of the screening chamber. A discharge port is located on the side wall of the screening chamber. The bottom end of the screen channel extends and inserts into the discharge port. The vibrator is fixedly connected to the circumferential side of the vibrating rod. When the vibrator operates, it causes the vibrating rod to shake. A sound-insulating layer is provided within the body, wrapping around the outside of the screening chamber. Multiple sound-insulating columns are filled within the sound-insulating layer, with adjacent columns abutting against each other. The sound-insulating columns are hollow and perpendicular to the vibrating rod, thus reducing the noise generated during equipment operation.

Description

Technical Field

[0001] This utility model relates to the technical field of rice processing equipment, specifically to a low-noise rice screening device. Background Technology

[0002] Rice is one of my country's staple grains. Commercial rice is a finished product made from paddy through cleaning, hulling, milling, and finishing processes. Through appropriate technological processes and proper operating methods, various impurities mixed in with paddy are removed. The rice processing procedure is an important process to ensure the quality of rice, and rice screening is an indispensable step in the rice processing procedure.

[0003] A Chinese utility model patent with publication number CN216827222U discloses a screening device for rice refining. The device includes a body with a feeding port at the top and a discharge port on the side. A first screening screen, a second screening screen, and a third screening screen are connected by springs within the body. These three screens are interconnected by connecting rods that allow them to move synchronously. A vibrator is fixedly connected to the second screening screen, causing all three screens to vibrate simultaneously. In use, the first, second, and third screening screens can respectively screen out large, medium, small, and broken rice particles, achieving the purpose of graded refining. The vibration enhances the screening effect and facilitates discharge, thus improving screening efficiency. The aforementioned prior art has the following drawbacks: When screening rice, the screening mesh needs to be constantly shaken, causing the ends of the mesh to constantly impact and rub against the inner wall of the equipment. This results in the machine emitting high-frequency, high-decibel, and high-intensity noise, causing noise pollution to the surrounding working environment, reducing the user experience, and diminishing the practicality of the equipment. Utility Model Content

[0004] The purpose of this invention is to provide a low-noise rice screening device to reduce the noise generated during operation, thereby solving the problems mentioned in the background art.

[0005] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution: A low-noise rice screening device includes a body with a screening chamber inside. A vibrator is installed within the screening chamber. A feed inlet is located at the top of the body. A vibrating rod is connected to the screening chamber via a vibration spring. The vibrating rod is perpendicular to the bottom wall of the screening chamber. A screen channel is wound around the vibrating rod via a fixed rod. Screen holes are formed in the screen channel. The side of the screen channel away from the vibrating rod does not abut against the inner wall of the screening chamber. A discharge outlet is located on the side wall of the screening chamber. The bottom end of the screen channel extends and inserts into the discharge outlet. The width of the discharge outlet is greater than the width of the screen channel. The end of the outlet away from the screen channel is threaded with a sealing cap. When the sealing cap is tightened at the sealing opening, it completely blocks the outlet. The vibrator is fixedly connected to the circumferential side of the vibrating rod. After the vibrator works, it drives the vibrating rod to shake. A sound insulation layer is opened in the machine body. The sound insulation layer wraps around the outside of the screening chamber. The sound insulation layer is filled with sound insulation columns. There are multiple sound insulation columns. Adjacent sound insulation columns abut against each other. The sound insulation columns are hollow and perpendicular to the vibrating rod. The ends of the sound insulation columns are fixedly connected to the inner wall of the sound insulation layer away from the screening chamber.

[0006] As a preferred embodiment of this invention, each soundproof column has sound-absorbing particles fixedly connected to its inner wall. The sound-absorbing particles are arranged in a spherical polyhedral shape, and there are multiple sound-absorbing particles, which are randomly distributed on the inner wall of the soundproof cavity.

[0007] In a preferred embodiment of this invention, a partition plate is fixedly connected to the screening chamber. The partition plate is funnel-shaped on the side facing the feed inlet, and a connecting hole is provided on the partition plate. The connecting hole is the lowest point of the funnel-shaped side of the partition plate, and the highest point of the funnel-shaped side of the partition plate is the position where the partition plate connects to the screening chamber. The partition plate divides the screening chamber from bottom to top into a broken rice chamber, a secondary chamber, and a primary chamber. A vibrating rod passes through the connecting hole. The sieve channels are divided into broken rice channels, secondary channels, and primary channels corresponding to the broken rice chamber, secondary chamber, and primary chamber. The broken rice channels, secondary channels, and primary channels are not interconnected. The discharge port is divided into a broken rice outlet, a secondary outlet, and a primary outlet corresponding to the broken rice chamber, secondary chamber, and primary chamber. The bottom end of the primary channel is inserted into the primary outlet, the secondary channel is inserted into the secondary outlet, and the broken rice channel is inserted into the broken rice outlet. The sieve holes on the primary channel are divided into primary holes, and the sieve holes on the secondary channel are divided into secondary holes. The diameter of the secondary holes is smaller than that of the primary holes.

[0008] In a preferred embodiment of this invention, a vibrating ring is fixedly connected to the vibrating rod at the position corresponding to the connecting hole. An auxiliary spring is fixedly connected to the circumferential side wall of the vibrating ring. The end of the auxiliary spring away from the vibrating ring is fixedly connected to the inner wall of the connecting hole. An annular rice-falling space is formed between the outer wall of the vibrating ring and the inner wall of the connecting hole. The rice-falling space between the primary cavity and the secondary cavity is supported by the secondary channel, and the rice-falling space between the secondary cavity and the broken rice cavity is supported by the broken rice channel.

[0009] As a preferred embodiment of this utility model, the partition plate is made of food-grade rubber material, and the sieve channel is made of food-grade rubber material.

[0010] As a preferred embodiment of this invention, a sound-absorbing cotton is fixedly connected to the sealing cover at the position facing the screening chamber, and the sound-absorbing cotton forms a sound-absorbing layer on the sealing cover. Beneficial effects

[0011] The beneficial effects of this utility model are: When in use, since the screen channel is located below the feed inlet, when rice grains enter the screening chamber from the feed inlet, the rice grains will fall directly into the screen channel. Then, the vibrator begins to vibrate. Since both ends of the vibrating rod are connected by vibrating springs, the vibrating rod vibrates synchronously with the vibrator. The vibrating rod can also drive the screen to vibrate. The rice on the screen slides along the screen under the action of gravity. The screen holes screen the rice through their apertures. After screening, the rice is sent out through the discharge port. Since the screen does not come into contact with the inner wall of the screening chamber, the screen will not generate noise from impacting or rubbing against the inner wall of the screening chamber during screening, thus initially achieving the effect of reducing noise during operation. The remaining working noise in the screening chamber is preferentially transmitted to the sound insulation layer. In the sound insulation layer, since the ends of the sound insulation columns facing the screening chamber do not come into contact with the inner wall of the sound insulation layer, the noise needs to be converted into air as the transmission medium when it propagates to the sound insulation layer. The conversion of the transmission medium weakens the intensity of the noise. When the noise is transmitted to the multiple sound insulation columns again, the intensity of the noise is much lower than the intensity generated in the screening chamber. Because the soundproof column has a hollow structure, the plane formed by multiple noise columns is not a smooth plane. This causes a diffuse rebound effect when noise waves travel across the surface formed by the ends of the multiple noise columns. That is, some noise waves enter the soundproof column, while some are rebounded back to the inner wall of the soundproof interlayer facing the screening chamber. This decomposes the noise waves and further reduces the noise intensity. The noise waves that rebound into the screening chamber collide with newly transmitted noise waves in the screening chamber, further reducing the noise intensity and decibels. This significantly weakens the noise in the soundproof interlayer, reducing the noise generated when the equipment is working, reducing noise pollution to the surrounding environment when screening rice, and improving the user experience. Attached Figure Description

[0012] 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. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1To show a schematic diagram of the overall internal structure of the machine; Figure 2 This is a schematic diagram showing the end face structure of the primary and secondary tracks; Figure 3 This is a schematic diagram illustrating the internal structure of a single soundproof column.

[0014] The attached diagram lists the components represented by each number as follows: 1. Machine body; 11. Screening chamber; 111. Primary chamber; 112. Secondary chamber; 113. Broken rice chamber; 12. Vibrator; 13. Feed inlet; 2. Vibrating rod; 21. Vibrating ring; 22. Auxiliary spring; 23. Rice falling space; 3. Screen channel; 31. Primary channel; 32. Secondary channel; 33. Broken rice channel; 4. Screen hole; 41. Primary hole; 42. Secondary hole; 5. Discharge port; 51. Primary outlet; 52. Secondary outlet; 53. Broken rice outlet; 6. Sound insulation layer; 61. Sound insulation column; 62. Sound-absorbing particles; 7. Separator plate; 71. Connecting hole; 8. Sealing cover; 81. Sound-absorbing cotton. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] See Figure 1-3As shown, a low-noise rice screening device includes a body 1, a screening chamber 11 within the body 1, and a feed inlet 13 at the top of the body 1. A vibrator 12 is installed within the screening chamber 11. A vibrating rod 2 is fixedly connected to the screening chamber 11, perpendicular to the bottom wall of the screening chamber 11. Vibrating springs are fixedly connected to both ends of the vibrating rod 2. The vibrating spring at the top of the vibrating rod 2 is fixedly connected to the top wall of the screening chamber 11, and the vibrating spring at the bottom of the vibrating rod 2 is fixedly connected to the bottom wall of the screening chamber 11. The vibrator 12 is fixedly connected to the circumferential side of the vibrating rod 2, and the vibrator 12 causes the vibrating rod 2 to shake when it operates. A screen channel 3 made of food-grade rubber is coiled around the vibrating rod 2 via a fixed rod. The rubber material has a certain degree of elasticity, and when the screen channel 3 vibrates and screens the rice, it can protect the rice and reduce the generation of broken rice. The screen channel 3 is spirally arranged, with its top end resting below the feed inlet 13. The side of the screen channel 3 away from the vibrating rod 2 does not abut against the inner wall of the screening chamber 11. Screen holes 4 are evenly distributed on the screen channel 3. A cylindrical discharge port 5 is provided on the side wall of the screening chamber 11. The bottom end of the screen channel 3 extends and is inserted into the discharge port 5. The width of the discharge port 5 is greater than the width of the screen channel 3. The end of the discharge port 5 away from the screening chamber 11 is inclined towards the ground. A sealing cap 8 is threadedly connected to the end of the discharge port 5 away from the screen channel 3. When the sealing cap 8 is tightened at the sealing port, it completely seals the discharge port 5. A sound-absorbing cotton 81 is fixedly connected to the sealing cap 8 at the position facing the screening chamber 11, forming a sound-absorbing layer on the sealing cap 8. The sealing cover 8 enables the discharge port 5 to form a cylindrical temporary storage position, changing the state of the discharge port 5 being open for a long time. This reduces the frequency of noise released from the discharge port 5, ensures the sound insulation effect of the equipment, reduces the frequency of noise emitted by the equipment during use, and achieves the effect of reducing the noise generated when the equipment is working.

[0017] See Figure 1-3 As shown, a food-grade rubber partition plate 7 is fixedly connected in the screening chamber 11. The side of the partition plate 7 facing the feed inlet 13 is funnel-shaped. A connecting hole 71 is provided on the partition plate 7. The connecting hole 71 is the lowest point of the funnel-shaped side of the partition plate 7. The highest point of the funnel-shaped side of the partition plate 7 is the position where the partition plate 7 is connected to the screening chamber 11. The funnel-shaped side can guide the rice grains, so that the rice grains falling on the partition plate 7 roll down to the position of the connecting hole 71, so that the screening action remains continuous and the number of rice grains remaining on the partition plate 7 is reduced.

[0018] See Figure 1-3As shown, a vibrating ring 21 is fixedly connected to the vibrating rod 2 at the position corresponding to the connecting hole 71. An auxiliary spring 22 is fixedly connected to the circumferential side wall of the vibrating ring 21. The end of the auxiliary spring 22 away from the vibrating ring 21 is fixedly connected to the inner wall of the connecting hole 71. When the vibrating rod 2 vibrates, the auxiliary spring 22 can constrain the movement of the vibrating rod 2 through its own elasticity, preventing the vibrating rod 2 from hitting the partition plate 7 and generating excessive noise. The space between the outer wall of the vibrating ring 21 and the inner wall of the connecting hole 71 forms an annular rice drop space 23. The rice drop space 23 can define the range of rice grains falling, which is beneficial for workers to customize the sieve channel 3. It also helps the rice grains on the partition plate 7 to fall accurately into the sieve channel 3 of the next chamber, reducing the number of rice grains that fall outside the sieve channel 3 and are not screened, thus ensuring the stability of the equipment.

[0019] See Figure 1-3 As shown, the partition plate 7 divides the screening chamber 11 from bottom to top into a broken rice chamber 113, a secondary chamber 112, and a primary chamber 111. The vibrating rod 2 passes through the connecting hole 71. The sieve channel 3 is divided into a broken rice channel 33, a secondary channel 32, and a primary channel 31 corresponding to the broken rice chamber 113, the secondary chamber 112, and the primary chamber 111. The broken rice channel 33, the secondary channel 32, and the primary channel 31 are not connected to each other. The top of the primary channel 31 is connected to the feed inlet 13. The rice drop space 23 between the primary chamber 111 and the secondary chamber 112 is supported by the secondary channel 32. The secondary chamber 112 and the broken rice... The rice drop space 23 between chambers 113 is received by the rice breaking channel 33. The discharge port 5 is divided into a rice breaking outlet 53, a secondary outlet 52, and a primary outlet 51, corresponding to the rice breaking chamber 113, the secondary chamber 112, and the primary chamber 111. The bottom end of the primary channel 31 is inserted into the primary outlet 51, the secondary channel 32 is inserted into the secondary outlet 52, and the rice breaking channel 33 is inserted into the rice breaking outlet 53. The sieve holes 4 on the primary channel 31 are divided into primary holes 41, and the sieve holes 4 on the secondary channel 32 are divided into secondary holes 42. The aperture of the secondary holes 42 is smaller than that of the primary holes 41. By dividing the sieve channels 3, sieve holes 4, and discharge port 5, the screening chamber 11 can perform multi-stage screening, improving the screening accuracy of the rice and enhancing the precision of the equipment.

[0020] See Figure 1-3 As shown, a sound insulation layer 6 is provided in the body 1, which wraps around the outside of the screening chamber 11. The sound insulation layer 6 is filled with sound insulation columns 61, and multiple sound insulation columns 61 are provided. Adjacent sound insulation columns 61 abut against each other. The sound insulation columns 61 are hollow and perpendicular to the vibration rod 2. The ends of the sound insulation columns 61 are fixedly connected to the inner wall of the sound insulation layer 6 away from the screening chamber 11. Each sound insulation column 61 has a sound absorbing particle 62 fixedly connected to its inner wall. The sound absorbing particles 62 are spherical polyhedral in shape, and multiple sound absorbing particles 62 are provided. The multiple sound absorbing particles 62 are randomly distributed on the inner wall of the sound insulation chamber.

[0021] One specific application of this embodiment is: During rice screening, a vibrator drives a vibrating rod 2 to shake. An auxiliary spring 22 limits the shaking range of the vibrating rod 2, and the vibrating rod 2 drives all the screening channels 3 to vibrate and shake synchronously. Workers feed rice into the primary channel 31 through the feed inlet 13. The rice grains slide and rotate along the primary channel 31 under the action of vibration and shaking. The primary holes 41 on the primary channel 31 screen the rice grains through their aperture. The screened rice grains fall onto the partition plate 7 between the primary chamber 111 and the secondary chamber 112. Due to the shape of the partition plate 7, the rice grains roll toward the rice drop space 23 of the connecting hole 71 and eventually enter the secondary channel 32 through the rice drop space 23. The rice grains that do not fall onto the partition plate 7 eventually enter the primary outlet 51 for temporary storage. After a certain number have accumulated, the worker opens the sealing cover 8 at the primary outlet 51 to remove the screened rice grains. After the rice grains are removed, the sealing cover 8 is rotated and sealed back onto the end of the primary outlet 51. Rice grains falling into the secondary channel 32 undergo the same screening process as in the primary channel 31. After screening, the rice grains are temporarily stored at the secondary outlet 52. Rice grains falling into the secondary chamber 112 and the broken rice chamber 113 are guided by the separator 7 and pass through the rice drop space 23 between the two chambers to enter the broken rice channel 33. The broken rice on the broken rice channel 33 is then guided directly to the broken rice outlet 53 for temporary storage. The rice retrieval operations at the secondary outlet 52 and the broken rice outlet 53 are the same as those at the primary outlet 51.

[0022] When noise is generated in the screening channel, the working noise is preferentially transmitted to the sound insulation layer 6. Because the ends of the sound insulation columns 61 facing the screening cavity 11 do not contact the inner wall of the sound insulation layer 6, the noise is weakened due to the change in the transmission medium. When the noise is transmitted to multiple sound insulation columns 61 again, because the structure of the sound insulation columns 61 is hollow, the plane formed by the multiple noise columns is not a smooth plane. This causes a diffuse reflection effect when the noise waves travel to the surface formed by the end faces of the multiple noise columns. That is, some noise waves enter the sound insulation columns 61, and some are reflected back to the inner wall of the sound insulation layer 6 facing the screening cavity 11, thus decomposing the noise waves and further reducing the noise intensity. The noise entering the sound insulation columns 61 comes into contact with multiple sound-absorbing particles 62. After contact, the noise waves again undergo diffuse reflection, causing the noise waves in the sound insulation columns 61 to abut against each other, thus significantly weakening the noise in the sound insulation layer 6. In summary, the above steps reduce the noise generated by the equipment during operation, decrease noise pollution to the surrounding environment during rice sifting, and improve the user experience.

[0023] Of course, the above description is not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, alterations, additions or substitutions made by those skilled in the art within the scope of the present utility model should be protected by the present utility model.

Claims

1. A low-noise rice screening device, comprising a body (1), a screening chamber (11) being provided in the body (1), a vibrator (12) being provided in the screening chamber (11), and a feed inlet (13) being provided at the top of the body (1), characterized in that: The screening chamber (11) is connected to a vibrating rod (2) via a vibration spring. The vibrating rod (2) is perpendicular to the bottom wall of the screening chamber (11). The vibrating rod (2) is wound with a screen channel (3) via a fixed rod. Screen holes (4) are opened in the screen channel (3). The side of the screen channel (3) away from the vibrating rod (2) does not abut against the inner wall of the screening chamber (11). A discharge port (5) is opened on the side wall of the screening chamber (11). The bottom end of the screen channel (3) extends and is inserted into the discharge port (5). The width of the discharge port (5) is greater than the width of the screen channel (3). A sealing cap (8) is threaded to the end of the discharge port (5) away from the screen channel (3). The sealing cap (8) is tightened at the sealing port. When the sealing cover (8) completely seals the discharge port (5), the vibrator (12) is fixedly connected to the circumferential side of the vibrating rod (2). After the vibrator (12) works, it drives the vibrating rod (2) to shake. A sound insulation layer (6) is provided in the machine body (1). The sound insulation layer (6) wraps around the outside of the screening chamber (11). The sound insulation layer (6) is filled with sound insulation columns (61). There are multiple sound insulation columns (61). The adjacent sound insulation columns (61) abut against each other. The sound insulation columns (61) are hollow. The sound insulation columns (61) are perpendicular to the vibrating rod (2). The end of the sound insulation column (61) is fixedly connected to the inner wall of the sound insulation layer (6) away from the screening chamber (11).

2. The low-noise rice screening device according to claim 1, characterized in that: Each of the soundproof columns (61) has a sound-absorbing particle (62) fixedly connected to its inner wall. The sound-absorbing particles (62) are arranged in a spherical polyhedral shape. There are multiple sound-absorbing particles (62), and the multiple sound-absorbing particles (62) are randomly distributed on the inner wall of the soundproof cavity.

3. The low-noise rice screening device according to claim 2, characterized in that: A partition plate (7) is fixedly connected in the screening chamber (11). The partition plate (7) is funnel-shaped on the side facing the feed inlet (13). A connecting hole (71) is provided on the partition plate (7). The connecting hole (71) is the lowest point of the funnel-shaped side of the partition plate (7). The highest point of the funnel-shaped side of the partition plate (7) is the position where the partition plate (7) is connected to the screening chamber (11). The partition plate (7) divides the screening chamber (11) from bottom to top into a broken rice chamber (113), a secondary chamber (112), and a primary chamber (111). The vibrating rod (2) passes through the connecting hole (71). The sieve channel (3) is divided into a broken rice channel (33) and a secondary channel (34) corresponding to the broken rice chamber (113), the secondary chamber (112), and the primary chamber (111). The primary channel (32) and the secondary channel (31), the broken rice channel (33), the secondary channel (32) and the primary channel (31) are not connected to each other. The discharge port (5) is divided into the broken rice cavity (113), the secondary cavity (112) and the primary cavity (111) with broken rice outlet (53), secondary outlet (52) and primary outlet (51). The bottom end of the primary channel (31) is inserted into the primary outlet (51), the secondary channel (32) is inserted into the secondary outlet (52), and the broken rice channel (33) is inserted into the broken rice outlet (53). The sieve hole (4) on the primary channel (31) is divided into a primary hole (41), and the sieve hole (4) on the secondary channel (32) is divided into a secondary hole (42). The diameter of the secondary hole (42) is smaller than the diameter of the primary hole (41).

4. The low-noise rice screening device according to claim 3, characterized in that: A vibrating ring (21) is fixedly connected to the vibrating rod (2) at the position corresponding to the connecting hole (71). An auxiliary spring (22) is fixedly connected to the circumferential side wall of the vibrating ring (21). The end of the auxiliary spring (22) away from the vibrating ring (21) is fixedly connected to the inner wall of the connecting hole (71). The space between the outer wall of the vibrating ring (21) and the inner wall of the connecting hole (71) forms an annular rice drop space (23). The rice drop space (23) between the primary cavity (111) and the secondary cavity (112) is supported by the secondary channel (32). The rice drop space (23) between the secondary cavity (112) and the rice breaking cavity (113) is supported by the rice breaking channel (33).

5. The low-noise rice screening device according to claim 3, characterized in that: The partition plate (7) is made of food-grade rubber, and the sieve channel (3) is made of food-grade rubber.

6. The low-noise rice screening device according to claim 1, characterized in that: The sealing cover (8) is fixedly connected to a sound-absorbing cotton (81) at a position facing the screening chamber (11), and the sound-absorbing cotton (81) forms a sound-absorbing layer on the sealing cover (8).

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