Low-noise anti-blocking rice screening mechanism

Abstract

The low-noise anti-blocking rice screening mechanism comprises a mechanism body, the mechanism body comprises a first-stage screening assembly and a second-stage screening assembly, the surfaces of the first-stage screening assembly and the second-stage screening assembly incline in the same direction and have a height difference, and a combined type noise reduction vibration unit is arranged below a screen; detachable flow guide anti-blocking mechanisms are arranged on the two sides of the screen to prevent impurities from being accumulated to block screen holes. An elastic damping noise reduction structure is introduced into a vibration system, the operation noise is effectively reduced, meanwhile, a flow guide anti-blocking structure is matched, the screening continuity and stability are improved, and the problems that in the prior art, a screen is prone to being blocked, and the operation noise is large are solved.

Description

Technical Field

[0001] This utility model relates to the field of grain processing equipment technology, specifically to a low-noise, anti-clogging rice screening mechanism. Background Technology

[0002] As a staple food crop, rice often contains impurities such as fine sand, broken rice, and rice husk fragments during its processing. To improve the quality and safety of finished rice, pre-treatment using specialized screening equipment is usually necessary.

[0003] Among existing rice screening equipment, a typical technical solution is the Chinese utility model patent with patent number CN202120585177.8, which discloses a rice screening mechanism composed of primary and secondary screening devices. This mechanism uses sieves with different mesh diameters to initially classify impurities of varying sizes, effectively improving screening accuracy. Although this structure achieves a certain degree of automated impurity removal, it still has the following shortcomings in practical applications:

[0004] High operating noise: Traditional screening mechanisms usually rely on high-speed eccentric motors to drive vibrators for vibration screening, but they lack sound insulation or buffer structures, generating significant noise during vibration, which affects the on-site operating environment and the comfort of using the equipment.

[0005] Impurities easily clog the screen: During vibration, impurities tend to accumulate on the edges or corners of the screen, especially during continuous operation, which can easily cause screen clogging, thus affecting screening efficiency and screening accuracy, and even requiring manual cleaning after shutdown, increasing maintenance costs.

[0006] In summary, existing screening equipment still needs improvement in terms of low-noise design and anti-clogging structure optimization to meet the higher requirements of modern grain processing equipment for continuity, efficiency and environmental protection. Utility Model Content

[0007] The purpose of this invention is to provide a low-noise, anti-clogging rice sorting mechanism to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A low-noise, anti-clogging rice screening mechanism includes a mechanism body, which includes a primary screening component and a secondary screening component. The surfaces of the primary screening component and the secondary screening component are inclined in the same direction and form a height difference. Both the primary screening component and the secondary screening component are equipped with screens. A composite noise-absorbing vibration unit is provided below the screens. A flow-guiding and anti-clogging mechanism is provided on both sides of the screens.

[0010] Preferably, the composite noise reduction and vibration reduction unit includes a motor body, an eccentric wheel, an elastic damping pad, and a noise reduction cover. The eccentric wheel is fixed on the motor output shaft, and the noise reduction cover covers the outside of the motor body.

[0011] Preferably, the flow guiding and anti-clogging mechanism includes a flow guide plate and a detachable connector. The flow guide plate is disposed on both sides of the screen and is inclined to guide impurities to be discharged laterally.

[0012] Preferably, a feed hopper is provided above the primary screening component, and the bottom opening of the feed hopper is aligned with the screen of the primary screening component.

[0013] Preferably, a first impurity trough is provided below the secondary screening component for collecting large particle impurities that have been screened out.

[0014] Preferably, a second impurity tank is provided below the primary screening component for collecting small particulate impurities that have been screened out.

[0015] Preferably, the mechanism body is provided with a detachable maintenance opening for quick replacement of the screen and cleaning of impurities.

[0016] Preferably, the screen is a 304 stainless steel mesh structure, and the screen aperture size is set to 1.5mm and 3.5mm respectively according to the screening level.

[0017] Preferably, the vibration frequency of the composite noise-absorbing vibration unit is controlled within the range of 30 to 50 Hz, and it is located at a position symmetrical to the central axis at the bottom of the screen.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This low-noise, anti-clogging rice screening mechanism features a newly added composite sound-absorbing vibration structure. Through the built-in elastic shock-absorbing pads and sound-absorbing cover, the noise during the screening process is reduced by more than 20%, making it suitable for grain storage workshops that are sensitive to noise.

[0020] 2. This low-noise, anti-clogging rice screening mechanism is equipped with inclined guide anti-clogging plates on both sides. Without affecting the screening accuracy, it guides impurities to slide quickly down to the impurity tanks on both sides, effectively preventing clogging and reducing the frequency of manual cleaning. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a low-noise, anti-clogging rice screening mechanism according to the present invention;

[0022] Figure 2 This is a cross-sectional view of the primary screening component of this utility model;

[0023] Figure 3This is a schematic diagram of the composite noise-absorbing vibration unit of the utility model;

[0024] Figure 4 This is a cross-sectional view of the flow guiding and anti-blocking mechanism described in the utility model.

[0025] Figure 5 This is a schematic diagram of the flow path of rice and impurities during the screening process described in the utility model.

[0026] In the diagram: 1. Primary screening component; 2. Secondary screening component; 3. Screen; 4. Composite noise-reducing vibration unit; 41. Motor body; 42. Eccentric wheel; 43. Elastic shock-absorbing pad; 44. Noise-reducing cover; 5. Flow guiding and anti-blocking mechanism; 51. Flow guide plate; 52. Detachable connector; 6. Feed hopper; 7. First impurity trough; 8. Second impurity trough; 9. Detachable maintenance opening; 10. Finished product outlet. Detailed Implementation

[0027] 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.

[0028] Please see Figures 1-5 As shown, this utility model provides a technical solution:

[0029] A low-noise, anti-clogging rice screening mechanism includes a mechanism body, which is mainly composed of a primary screening component (1) and a secondary screening component (2). The screen surfaces of the two screening components are arranged in the same direction with an inclination and have a height difference, so that the material can slide naturally to the next screening area by gravity during the screening process, thereby improving the screening efficiency.

[0030] Both the primary screening component (1) and the secondary screening component (2) are equipped with screens (3), preferably made of 304 stainless steel wire mesh to improve corrosion resistance and service life. The primary screen has a mesh size of 1.5 mm and is used to remove small impurities such as broken rice and sand. The secondary screen has a mesh size of 3.5 mm and is used to block impurities larger than rice grains, such as rice husk fragments.

[0031] like Figure 3As shown, a composite noise-absorbing vibration unit (4) is provided below each screen (3). The vibration unit includes: a motor body (41) installed at the bottom of the screen frame, an eccentric wheel (42) connected to the output shaft, which is connected to the screen through an elastic damping pad (43). The motor is also covered with a noise-absorbing cover (44) to suppress the noise generated during vibration. The vibration system operates at a frequency of 30 to 50 Hz and is installed symmetrically at the bottom of the screen. It can effectively drive the screen to vibrate, improve screening efficiency, and reduce operating noise by more than 20%.

[0032] like Figure 4 As shown, the screen (3) is provided with a flow guiding and anti-clogging mechanism (5) on both sides, including an inclined flow guide plate (51) and a detachable connector (52). The flow guide plate (51) is made of stainless steel plate and is installed on the inner wall of the screen frame through a quick snap-fit ​​structure (52). Its function is to guide impurities along the edge of the screen to slide down to the impurity troughs on both sides during the screening process, prevent impurities from accumulating at the edge of the screen and causing blockage, and improve the continuous operation capability of the equipment.

[0033] A feeding hopper (6) is provided above the primary screening component (1), and the bottom opening of the feeding hopper is directly opposite the center area of ​​the primary screen (3) to ensure that the rice is evenly distributed in the screening area during the feeding process.

[0034] During the screening process, small particles such as sand will pass through the primary screen (3) and fall into the second impurity trough (8) located below it; rice of qualified particle size will naturally slide to the secondary screening component (2) located below for further screening, while large particles are blocked on the secondary screen and guided into the first impurity trough (7) for centralized collection.

[0035] After being screened by the secondary screen (3), normal rice grains pass through the screen holes and slide naturally from the bottom of the screen to the finished product outlet (10) located below the main body of the mechanism. This outlet can be connected to an external conveying system, weighing system, etc., to realize the automatic separation and packaging of rice.

[0036] To facilitate maintenance and cleaning, the main body of the mechanism is provided with detachable maintenance openings (9) on both sides, allowing users to quickly disassemble the screen (3) or guide plate and other components for cleaning impurities or replacing the structure, which significantly improves the convenience of use and maintenance efficiency.

[0037] 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 claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A low-noise, anti-clogging rice sorting mechanism, characterized in that: The mechanism includes a main body, which includes a primary screening component (1) and a secondary screening component (2). The surfaces of the primary screening component (1) and the secondary screening component (2) are inclined in the same direction and form a height difference. Both the primary screening component (1) and the secondary screening component (2) are provided with screens (3). A composite noise-absorbing vibration unit (4) is provided below the screens (3). A flow guiding and anti-blocking mechanism (5) is provided on both sides of the screens (3).

2. The rice screening mechanism according to claim 1, characterized in that: The composite noise reduction and vibration unit (4) includes a motor body (41), an eccentric wheel (42), an elastic damping pad (43), and a noise reduction cover (44). The eccentric wheel (42) is fixed on the output shaft of the motor, and the noise reduction cover (44) covers the outside of the motor body (41).

3. The rice screening mechanism according to claim 1, characterized in that: The flow guiding and anti-blocking mechanism (5) includes a flow guide plate (51) and a detachable connector (52). The flow guide plate (51) is disposed on both sides of the screen (3) and is inclined to guide impurities to be discharged laterally.

4. The rice screening mechanism according to claim 1, characterized in that: The primary screening component (1) is provided with a feeding hopper (6) above it, and the bottom opening of the feeding hopper (6) is aligned with the screen (3) of the primary screening component (1).

5. The rice screening mechanism according to claim 1, characterized in that: The secondary screening component (2) is provided with a first impurity tank (7) below it, which is used to collect large particle impurities that have been screened out.

6. The rice screening mechanism according to claim 1, characterized in that: The primary screening component (1) is provided with a second impurity tank (8) below it, which is used to collect small particle impurities that have been screened out.

7. The rice screening mechanism according to claim 1, characterized in that: The main body of the mechanism is provided with a detachable maintenance opening (9) for quick replacement of the screen (3) and cleaning of impurities.

8. The rice screening mechanism according to claim 1, characterized in that: The screen (3) is a 304 stainless steel mesh structure, and the screen aperture size is set to 1.5mm and 3.5mm respectively according to the screening level.

9. The rice screening mechanism according to claim 1, characterized in that: The vibration frequency of the composite noise-absorbing vibration unit (4) is controlled within the range of 30 to 50 Hz, and it is set at the symmetrical position of the bottom center axis of the screen (3).

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