A grading device for rice hulls

Abstract

The utility model relates to the field of grain processing equipment, concretely is a kind of grading screening device for rice hull, including vibrating screening machine, conveying cavity is provided in vibrating screening machine inside, two sieve plates are provided in conveying cavity inner wall, two sieve plates are arranged in up and down, the sieve plate top end fixed connection of being located upper limit seat is connected. The position of the movable rod is supported by the limiting plate in the initial state, and there is a gap between the bottom end of the pressing plate and the surface of the uppermost sieve plate, which facilitates the conveying of materials. Under the vibration of the vibrating screening machine, the movable rod drives the pressing plate and the guide plate to vibrate on the surface of the uppermost sieve plate under the action of the tension spring. Through the action of the guide plate, the material inside the conveying cavity is blocked, so that part of the material is guided out of the gap between the pressing plate and the sieve plate each time the vibrating, and the material conveyed out of the pressing plate is laid on the sieve plate by the pressing of the pressing plate. In this way, the quality of material screening is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of grain processing equipment, specifically a grading and screening device for rice husks. Background Technology

[0002] A vibrating screen is a device that uses a vibration source, such as a vibrating motor and eccentric blocks, to generate periodic vibration force, causing materials to jump, roll, or throw on a screen, thereby achieving particle grading and impurity separation. It is mainly used in the food, pharmaceutical, chemical, and metallurgical industries and is suitable for screening, filtering, and solid-liquid separation of granular, powder, and viscous materials. Its screening accuracy can reach over 500 mesh, with a minimum filtration particle size of 5 microns. It supports multi-layer grading to meet different particle size requirements. The screening process involves the material being stratified on the screen surface by vibration. Fine particles pass through the screen holes to become the undersize material, while coarse particles remain on the screen surface to become the oversize material. Vibrating screens are typically used for grading rice husks.

[0003] Chinese patent CN222112515U discloses a grain raw material screening device for brewing. Through a graded screening method, the grain sieve can screen grains according to different particle sizes. In addition, the device is equipped with a drive moving structure to drive the sieve in the horizontal direction, which is not only easy to clean, but also less likely to damage the outer skin of the grain.

[0004] However, the patent has the following defects in operation: when the grain is introduced into the sieve plate, there is no mechanism to guide the material so that the material can be spread flat on the sieve plate for vibration screening. As a result, if too much material is introduced at one time, the material cannot be screened sufficiently, and the material is easy to accumulate on the sieve plate, affecting the screening effect. Utility Model Content

[0005] This utility model aims to provide a grading and screening device for rice husks, mainly to solve the technical problem that the existing technology lacks a mechanism to guide the material so that it can be laid flat on the screen plate for vibration screening. As a result, if too much material is introduced at one time, the material cannot be fully screened, and the material tends to accumulate on the screen plate, affecting the screening effect.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A grading and screening device for rice husks includes a vibrating screener with a conveying chamber inside. Two screen plates are arranged vertically on the inner wall of the conveying chamber. A limiting seat is fixedly connected to the top of the upper screen plate, and a fixing plate is fixedly connected to the top of the inner wall of the limiting seat. A common moving rod slides through the top and bottom of the fixing plate. A baffle is fixedly connected to the top of the moving rod, and a tension spring is sleeved on the outer wall of the moving rod. The top of the tension spring is fixedly connected to the bottom of the baffle, and the bottom of the tension spring is fixedly connected to the top of the fixing plate. A pressure plate is fixedly connected to the bottom of the moving rod, and a guide plate is fixedly connected to one side of the pressure plate near the top of the conveying chamber.

[0008] The working principle and beneficial effects of this utility model:

[0009] 1. Working Principle: Due to the support of the limiting plate on the baffle, the pressure plate is supported in the initial state, leaving a gap between the bottom of the pressure plate and the surface of the uppermost screen plate, which facilitates the conveying of materials. Under the vibration of the vibrating screen, the moving rod, under the action of the tension spring, drives the pressure plate and guide plate to vibrate on the surface of the uppermost screen plate. Through the action of the guide plate, the material inside the conveying chamber is blocked, so that with each vibration, some material is discharged from the gap between the pressure plate and the screen plate. The pressure plate presses the material, causing the material conveyed out of the pressure plate to be spread flat on the screen plate, thereby ensuring the quality of material screening.

[0010] 2. Beneficial effects:

[0011] (1) By limiting the position of the moving rod, the bottom of the pressure plate and the surface of the uppermost screen plate are supported in the initial state, which facilitates the material conveying. Under the vibration of the vibrating screen, the moving rod drives the pressure plate and guide plate to vibrate on the surface of the uppermost screen plate under the action of the tension spring. Through the action of the guide plate, the material inside the conveying chamber is blocked, so that each time it vibrates, some material is discharged from the gap between the pressure plate and the screen plate. The pressure plate presses the material, so that the material conveyed out of the pressure plate is spread flat on the screen plate, thereby ensuring the quality of material screening.

[0012] Preferably, the inner wall of the conveying cavity is fixedly connected to two support plates, which are arranged vertically. Two screen plates are fixedly embedded on the surfaces of the two support plates, and the aperture of the upper screen plate is larger than that of the lower screen plate. The material is easily screened secondary by the two screen plates with different apertures.

[0013] Preferably, a feed bag is fixedly connected to one side of the top of the vibrating screener, and two observation holes are opened on the right side of the top of the vibrating screener near the feed bag. Both observation holes are connected to the conveying chamber, which facilitates the staff to observe the screening situation in real time.

[0014] Preferably, there is a gap between the bottom end of the pressure plate and the surface of the screen plate located above it, and the top of the guide plate is configured to be bent towards the top of the conveying cavity; when the material contacts the guide plate, the guide plate can block the material inside the conveying cavity.

[0015] Preferably, two extension plates are fixedly connected to the top of the fixed plate near the outer side of the moving rod. The two extension plates are arranged symmetrically in a circular array. A limiting plate is fixedly connected to the inner side of each extension plate near the bottom of the baffle. Due to the support of the limiting plate, there is always a gap between the pressure plate and the screen plate.

[0016] Preferably, the vibrating screener has three discharge troughs on the right side, two of which correspond to the two screen plates respectively, and the lowest discharge trough is flush with the bottom of the conveying chamber, so that different screened materials can be discharged from different discharge troughs.

[0017] Preferably, a first discharge plate is fixedly connected to the outer side of the uppermost discharge chute on the right side of the vibrating screen, a second discharge plate is fixedly connected to the outer side of the middle discharge chute on the right side of the vibrating screen, and a third discharge plate is fixedly connected to the outer side of the lowermost discharge chute on the right side of the vibrating screen. The upper screen plate discharges the material remaining on the screen plate through the uppermost discharge chute from the first discharge plate, while the screened material falls into the lower screen plate for further screening. The material remaining on the lower screen plate is discharged through the middle discharge chute from the second discharge plate, and the screened material finally falls into the bottom of the conveying chamber and is discharged through the bottommost discharge chute from the third discharge plate. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of a rice husk grading and screening device according to the present invention.

[0019] Figure 2 This is a partial cross-sectional view of a vibrating screening machine for grading and screening rice husks according to the present invention.

[0020] Figure 3 This is a structural diagram of a limiting seat for a rice husk grading and screening device according to the present invention.

[0021] Figure 4 This is a cross-sectional view of the pressure plate of a rice husk grading and screening device according to the present invention.

[0022] Figure 5 This utility model relates to a grading and screening device for rice husks. Figure 4 Structural diagram of region A in the middle;

[0023] Figure 6 This is a left view of a vibrating screening machine, which is a grading and screening device for rice husks according to this utility model.

[0024] The reference numerals in the accompanying drawings of the instruction manual include: 1. Vibrating screen; 2. Conveying chamber; 3. Feed bag; 4. Support plate; 5. Screen plate; 6. Limiting seat; 7. Fixing plate; 8. Moving rod; 9. Baffle; 10. Tension spring; 11. Extension plate; 12. Limiting plate; 13. Pressure plate; 14. Guide plate; 15. First discharge plate; 16. Second discharge plate; 17. Third discharge plate; 18. Discharge trough; 19. Observation hole. Detailed Implementation

[0025] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-6 As shown, a grading and screening device for rice husks includes a vibrating screener 1. The vibrating screener 1 has a conveying chamber 2 inside. A feed bag 3 is fixedly connected to one side of the top of the vibrating screener 1. Two observation holes 19 are opened on the right side of the top of the vibrating screener 1 near the feed bag 3. Both observation holes 19 are connected to the conveying chamber 2. Two screen plates 5 are arranged vertically on the inner wall of the conveying chamber 2. Both screen plates 5 are fan-shaped. Two support plates 4 are fixedly connected to the inner wall of the conveying chamber 2. The two support plates 4 are arranged vertically. The two screen plates 5 are fixedly embedded on the surface of the two support plates 4 respectively. The aperture of the upper screen plate 5 is larger than that of the lower screen plate 5. When the material falls from the feed bag 3 into the conveying chamber 2 of the vibrating screener 1, the vibrating screener 1 is started, so that the vibrating screener 1 vibrates the two screen plates 5 inside the conveying chamber 2, thereby screening the material.

[0027] A limiting seat 6 is fixedly connected to the top of the upper screen plate 5. A fixed plate 7 is fixedly connected to the top of the inner wall of the limiting seat 6. The same moving rod 8 slides through the top and bottom of the fixed plate 7. A baffle 9 is fixedly connected to the top of the moving rod 8. Two extension plates 11 are fixedly connected to the top of the fixed plate 7 near the outer side of the moving rod 8. The two extension plates 11 are arranged in a circular array symmetrically. A limiting plate 12 is fixedly connected to the inner side of the two extension plates 11 near the bottom of the baffle 9. At this time, the material is conveyed from top to bottom from the surface of the upper screen plate 5 under the action of vibration. Due to the action of the limiting seat 6, the material can only be conveyed on the surface of the upper screen plate 5.

[0028] A tension spring 10 is sleeved on the outer wall of the moving rod 8. The top end of the tension spring 10 is fixedly connected to the bottom end of the baffle 9, and the bottom end of the tension spring 10 is fixedly connected to the top end of the fixed plate 7. A pressure plate 13 is fixedly connected to the bottom end of the moving rod 8. A guide plate 14 is fixedly connected to one side of the pressure plate 13 near the top of the conveying chamber 2. There is a gap between the bottom end of the pressure plate 13 and the surface of the screen plate 5 located above it. The top of the guide plate 14 is designed to bend towards the top of the conveying chamber 2. Due to the support of the limiting plate 12, there is always a gap between the pressure plate 13 and the screen plate 5. When the material comes into contact with the guide plate 14... The guide plate 14 can block the material inside the conveying chamber 2. When the vibrating screen 1 vibrates, it drives the moving rod 8 to vibrate at the same time. Due to the action of the tension spring 10, it is easy to drive the moving rod 8 to move up and down. Thus, the moving rod 8 drives the pressure plate 13 to move up and down. During each vibration, some material is discharged from the gap between the pressure plate 13 and the screen plate 5. The pressure plate 13 presses the material, and the screen plate 5 is fan-shaped, so that the material conveyed out of the pressure plate 13 gradually spreads on the screen plate 5, thereby ensuring the quality of material screening.

[0029] The vibrating screen 1 has three discharge troughs 18 on its right side. Two of the discharge troughs 18 correspond to two screen plates 5 respectively. The lowermost discharge trough 18 is flush with the bottom of the conveying chamber 2. A first discharge plate 15 is fixedly connected to the outside of the uppermost discharge trough 18 on the right side of the vibrating screen 1. A second discharge plate 16 is fixedly connected to the outside of the middle discharge trough 18 on the right side of the vibrating screen 1. A third discharge plate 17 is fixedly connected to the outside of the lowermost discharge trough 18 on the right side of the vibrating screen 1. The upper screen plate 5 discharges the material remaining on the screen plate 5 through the uppermost discharge trough 18 from the first discharge plate 15. The screened material falls into the lower screen plate 5 for further screening. The material remaining on the lower screen plate 5 is discharged through the middle discharge trough 18 from the second discharge plate 16. Finally, the screened material falls into the bottom of the conveying chamber 2 and is discharged through the lowermost discharge trough 18 from the third discharge plate 17.

[0030] As described above, the specific implementation of this utility model is as follows: When the material falls from the feed bag 3 into the conveying chamber 2 of the vibrating screen 1, the vibrating screen 1 is started, causing the vibrating screen 1 to vibrate the two screen plates 5 inside the conveying chamber 2, thereby screening the material. At this time, the material is conveyed from top to bottom from the surface of the upper screen plate 5 under the action of vibration, and due to the action of the limiting seat 6, the material can only be conveyed on the surface of the upper screen plate 5. When the material contacts the guide plate 14, the guide plate 14 can block the material inside the conveying chamber 2. At this time, when the vibrating screen 1 vibrates, it drives the moving rod 8 to vibrate simultaneously, and due to the action of the tension spring 10, it is easy to drive the moving rod 8 to move up and down, thereby the moving rod 8 drives the pressure plate 13 to move up and down, and due to the support of the limiting plate 12, it is easy for the limiting plate 12 to adjust the position of the baffle 9. The baffle 9 supports the moving rod 8, which in turn supports the pressure plate 13, ensuring a constant gap between the pressure plate 13 and the screen plate 5. During each vibration, some material is discharged from the gap between the pressure plate 13 and the screen plate 5. The pressure plate 13 presses down on the material, and the fan-shaped screen plate 5 allows the material being conveyed from the pressure plate 13 to gradually spread out onto the screen plate 5, thus ensuring the quality of material screening. The upper screen plate 5 discharges the material remaining on it through the uppermost discharge chute 18 from the first discharge plate 15. The screened material falls into the lower screen plate 5 for further screening, while the material remaining on the lower screen plate 5 is discharged through the middle discharge chute 18 from the second discharge plate 16. Finally, the screened material falls into the bottom of the conveying chamber 2 and is discharged through the lowermost discharge chute 18 from the third discharge plate 17.

[0031] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A grading and screening device for rice husks, characterized in that, The vibrating screen (1) includes a conveying chamber (2) inside the vibrating screen (1). The inner wall of the conveying chamber (2) is provided with two screen plates (5). The two screen plates (5) are arranged vertically. The top of the upper screen plate (5) is fixedly connected to a limiting seat (6). The top of the inner wall of the limiting seat (6) is fixedly connected to a fixing plate (7). The top and bottom of the fixing plate (7) are slidably connected to the same moving rod (8). The top of the moving rod (8) is fixedly connected to a baffle (9). The outer wall of the moving rod (8) is fitted with a tension spring (10). The top of the tension spring (10) is fixedly connected to the bottom of the baffle (9). The bottom of the tension spring (10) is fixedly connected to the top of the fixing plate (7). The bottom of the moving rod (8) is fixedly connected to a pressure plate (13). The top of the pressure plate (13) near the top of the conveying chamber (2) is fixedly connected to a guide plate (14).

2. The grading and screening device for rice husks according to claim 1, characterized in that: The inner wall of the conveying cavity (2) is fixedly connected to two support plates (4), which are arranged vertically. Two screen plates (5) are fixedly embedded on the surfaces of the two support plates (4), and the aperture of the upper screen plate (5) is larger than that of the lower screen plate (5).

3. The grading and screening device for rice husks according to claim 1, characterized in that: The vibrating screen (1) has a feed bag (3) fixedly connected to one side of its top end. Two observation holes (19) are opened on the right side of the top end of the vibrating screen (1) near the feed bag (3). Both observation holes (19) are connected to the conveying chamber (2).

4. A grading and screening device for rice husks according to claim 1, characterized in that: The bottom of the pressure plate (13) is spaced from the surface of the screen plate (5) located above it, and the top of the guide plate (14) is configured to be bent toward the top of the conveying cavity (2).

5. A grading and screening device for rice husks according to claim 1, characterized in that: Two extension plates (11) are fixedly connected to the top of the fixed plate (7) near the outside of the moving rod (8). The two extension plates (11) are arranged in a circular array symmetrically. A limiting plate (12) is fixedly connected to the inner side of the two extension plates (11) near the bottom of the baffle (9).

6. A grading and screening device for rice husks according to claim 1, characterized in that: The vibrating screen (1) has three discharge troughs (18) on the right side, two of which correspond to the two screen plates (5) respectively, and the discharge trough (18) at the bottom is flush with the bottom of the conveying chamber (2).

7. A grading and screening device for rice husks according to claim 6, characterized in that: A first discharge plate (15) is fixedly connected to the outer side of the uppermost discharge trough (18) on the right side of the vibrating screen (1), a second discharge plate (16) is fixedly connected to the outer side of the middle discharge trough (18) on the right side of the vibrating screen (1), and a third discharge plate (17) is fixedly connected to the outer side of the lowermost discharge trough (18) on the right side of the vibrating screen (1).

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