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CN-224208508-U - Low-noise anti-blocking rice screening mechanism

CN224208508UCN 224208508 UCN224208508 UCN 224208508UCN-224208508-U

Abstract

The utility model discloses a low-noise anti-blocking rice screening mechanism which comprises a mechanism body, wherein the mechanism body comprises a primary screening component and a secondary screening component, the surfaces of the primary screening component and the secondary screening component incline in the same direction and are provided with a height difference, a composite silencing vibration unit is arranged below a screen, and two sides of the screen are provided with detachable diversion anti-blocking mechanisms so as to prevent impurities from accumulating and blocking screen holes. By introducing the elastic damping silencing structure in the vibration system, the running noise is effectively reduced, and meanwhile, the screening continuity and stability are improved by matching with the flow guide anti-blocking structure, so that the problems of easy blocking of a screen and high running noise in the prior art are solved.

Inventors

  • XU ZHIQIANG

Assignees

  • 佛山市中穗粮油有限公司

Dates

Publication Date
20260508
Application Date
20250508

Claims (9)

  1. 1. The low-noise anti-blocking rice screening mechanism is characterized by comprising a mechanism body, wherein the mechanism body comprises a primary screening component (1) and a secondary screening component (2), the primary screening component (1) and the surface of the secondary screening component (2) incline in the same direction and form a height difference, screens (3) are arranged inside the primary screening component (1) and the secondary screening component (2), a composite silencing vibration unit (4) is arranged below the screens (3), and flow guiding anti-blocking mechanisms (5) are arranged on two sides of the screens (3).
  2. 2. The rice screening mechanism according to claim 1, wherein the composite silencing vibration unit (4) comprises a motor main body (41), an eccentric wheel (42), an elastic shock pad (43) and a silencing cover (44), the eccentric wheel (42) is fixed on an output shaft of the motor, and the silencing cover (44) is covered on the outside of the motor main body (41).
  3. 3. The rice screening mechanism according to claim 1, wherein the diversion anti-blocking mechanism (5) comprises a diversion plate (51) and detachable connecting pieces (52), and the diversion plate (51) is arranged on two sides of the screen (3) and is obliquely arranged to guide the impurities to be discharged along the lateral direction.
  4. 4. The rice screening mechanism according to claim 1, wherein a feeding hopper (6) is arranged above the primary screening assembly (1), and a bottom opening of the feeding hopper (6) is aligned with the screen (3) of the primary screening assembly (1).
  5. 5. The rice screening mechanism according to claim 1, wherein a first impurity tank (7) is arranged below the secondary screening assembly (2) and used for collecting screened large-particle impurities.
  6. 6. The rice screening mechanism according to claim 1, wherein a second impurity tank (8) is arranged below the primary screening assembly (1) for collecting small-particle impurities which are screened out.
  7. 7. The rice screening mechanism as claimed in claim 1, wherein the mechanism body is provided with a detachable maintenance opening (9) for quick replacement of the screen (3) and cleaning of impurities.
  8. 8. The rice screening mechanism as recited in claim 1, wherein the screen (3) is a 304 stainless steel net-like structure, and the mesh sizes are set to 1.5mm and 3.5mm, respectively, according to the screening level.
  9. 9. The rice screening mechanism according to claim 1, wherein the vibration frequency of the composite silencing vibration unit (4) is controlled within 30-50 Hz, and the composite silencing vibration unit is arranged at the symmetrical position of the central axis at the bottom of the screen (3).

Description

Low-noise anti-blocking rice screening mechanism Technical Field The utility model relates to the technical field of grain processing equipment, in particular to a low-noise anti-blocking rice screening mechanism. Background Rice is used as a main grain crop, and impurities such as fine sand, broken rice, rice hull fragments and the like are often mixed in the processing flow of the rice. To improve the quality and eating safety of the finished rice, pretreatment is usually performed by means of special screening equipment. In the existing rice screening equipment, a typical technical scheme is as in the Chinese utility model patent with the patent number of CN202120585177.8, and a rice screening mechanism consisting of a primary screening device and a secondary screening device is disclosed, and the screening mechanism is used for primarily classifying large and small impurities by arranging screens with different screen hole diameters, so that the screening precision is effectively improved. Although the structure realizes automatic impurity removal to a certain extent, the following defects still exist in practical application: The traditional screening mechanism generally relies on a high-speed eccentric motor to drive a vibrator to perform vibration screening, but lacks a sound insulation or buffer structure, and generates remarkable noise in the vibration process, so that the on-site operation environment and the use comfort of equipment are affected; The impurity is easy to block the screen, and the impurity is easy to gather at the edge or corner of the screen in the vibration process, especially in the continuous operation state, the screen is easy to block, thereby influencing the screening efficiency and the screening precision, even needing to be shut down for manual cleaning, and increasing the maintenance cost. In summary, the existing screening equipment still needs to be improved in the aspects of low-noise design and anti-blocking structural optimization so as to meet the higher requirements of modern grain processing equipment on continuity, high efficiency and environmental protection. Disclosure of utility model The utility model aims to provide a low-noise anti-blocking rice screening mechanism so as to solve the problems in the background technology. In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a rice screening mechanism that jam is prevented to low noise, includes the mechanism body, the mechanism body includes one-level screening subassembly and second grade screening subassembly, one-level screening subassembly with second grade screening subassembly surface syntropy slope and formation difference in height, one-level screening subassembly and second grade screening subassembly are inside all to be equipped with the screen cloth, the screen cloth below is equipped with combined type amortization vibrations unit, the screen cloth both sides are equipped with the water conservancy diversion and prevent stifled mechanism. Preferably, the compound silencing vibration unit comprises a motor main body, an eccentric wheel, an elastic shock pad and a silencing cover, wherein the eccentric wheel is fixed on an output shaft of the motor, and the silencing cover is coated outside the motor main body. Preferably, the flow guiding anti-blocking mechanism comprises a flow guiding plate and a detachable connecting piece, wherein the flow guiding plate is arranged on two sides of the screen mesh and is obliquely arranged to guide impurities to be discharged along the lateral direction. Preferably, a feeding hopper is arranged above the first-stage screening assembly, and a bottom opening of the feeding hopper is aligned with a screen of the first-stage screening assembly. Preferably, a first impurity tank is arranged below the secondary screening assembly and used for collecting the screened large-particle impurities. Preferably, a second impurity tank is arranged below the first-stage screening assembly and used for collecting small-particle impurities which are screened out. Preferably, the mechanism body is provided with a detachable maintenance opening for quick replacement of the screen and cleaning of impurities. Preferably, the screen is in a 304 stainless steel net-shaped structure, and the size of the pore diameter of the screen is respectively 1.5mm and 3.5mm according to the screening grade. Preferably, the vibration frequency of the composite silencing vibration unit is controlled within a range of 30-50 Hz, and the composite silencing vibration unit is arranged at the symmetrical position of the central axis at the bottom of the screen. Compared with the prior art, the utility model has the beneficial effects that: 1. This rice screening mechanism of jam is prevented to low noise, newly-increased combined type amortization vibrations structure through built-in elasticity shock pad and amortizatio