Rice dust removal device

Abstract

The utility model discloses a rice dust removal device which comprises an elevator and a dust removal tank, the elevator lifts rice from the ground to the upper end of the dust removal tank, a conical collecting hopper is fixed at the lower end of the dust removal tank, a discharging channel is welded at the bottom of the collecting hopper and is arranged in an inclined mode, a material throwing device is installed at the axis of the dust removal tank, and the dust removal tank is connected with the discharging channel. Rice lifted by the elevator falls into the material throwing device, a negative pressure fan is fixed to the outer wall of the dust removal tank and connected with an exhaust pipe and an air supply pipe, the exhaust pipe is inserted into the dust removal tank in a penetrating mode and located at the position close to the top of the dust removal tank, a dust collection bag is detachably installed at the position of the air supply pipe, and the dust collection bag is connected with the dust removal tank. An inner baffle net is fixed at the inner top of the dust removal tank, and the distance between the inner baffle net and the inner wall of the dust removal tank is 2-4cm; according to the device, rice particles are centrifugally thrown out, dust particles are separated from rice, and then negative pressure suction is conducted.

Description

Technical Field

[0001] This utility model relates to a rice dust removal device. Background Technology

[0002] In the grain processing industry, especially in rice processing, dust removal is a crucial step. During harvesting, transportation, and storage, rice easily becomes contaminated with dust, bran, and other impurities. These impurities not only affect the quality and taste of the rice but can also cause wear or blockages in subsequent processing equipment. Therefore, efficient and reliable rice dust removal devices are of great significance for improving rice processing efficiency and product quality.

[0003] Traditional methods for removing dust from rice mainly employ equipment such as vibrating screens and air separators. Vibrating screens separate impurities through the vibration of the screen mesh, but their dust removal efficiency is limited, especially in removing fine dust, and they can easily cause rice breakage. Air separators use airflow to blow away lightweight impurities, but they often suffer from uneven airflow distribution, incomplete dust removal, and high energy consumption.

[0004] Based on the above problems, we designed a rice dust removal device that separates dust particles from rice by centrifugation and then removes dust by negative pressure suction. Utility Model Content

[0005] The purpose of this invention is to provide a rice dust removal device that separates dust particles from rice by centrifuging rice grains and then sucks them up under negative pressure.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A rice dust removal device includes a hoist and a dust collection tank. The hoist lifts rice from the ground to the upper part of the dust collection tank. A conical hopper is fixed to the lower end of the dust collection tank, and a discharge channel is welded to the bottom of the hopper. The discharge channel is inclined. A throwing device is installed at the axis of the dust collection tank, and the rice lifted by the hoist falls into the throwing device. A negative pressure fan is fixed to the outer wall of the dust collection tank. The negative pressure fan is connected to an exhaust pipe and an air supply pipe. The exhaust pipe passes through the dust collection tank and is located near the top of the dust collection tank. A dust collection bag is detachably installed at the air supply pipe. An inner baffle is fixed to the inner top of the dust collection tank. The distance between the inner baffle and the inner wall of the dust collection tank is 2cm to 4cm. The exhaust pipe is located outside the inner baffle. Rice particles thrown out by the throwing device are blocked by the inner baffle.

[0008] Preferably, the material throwing device includes a motor, a hollow shaft, a material throwing disc, and a connecting pipe. The motor is fixed to the outside of the dust collection tank. The hollow shaft is inserted from the center of the dust collection tank, and a bearing is fitted between the hollow shaft and the dust collection tank. A transmission unit is fitted between the hollow shaft and the motor. The material throwing disc is fixed to the lower end of the hollow shaft. Multiple discharge slots are arranged in a ring at the lower end of the hollow shaft. A bracket is fixed between the connecting pipe and the dust collection tank. The lower end of the connecting pipe is inserted into the hollow shaft, and the other end of the connecting pipe is curved and connected to the elevator. The rice lifted by the elevator enters the hollow shaft through the connecting pipe.

[0009] Preferably, the transmission unit is one of chain drive, gear drive, or belt drive.

[0010] Preferably, the material feeding disc is conical, with its diameter gradually decreasing upwards.

[0011] Preferably, a cone-shaped dispersing cone is formed at the center of the spool of the material throwing disc, and the dispersing cone is inserted upward into the hollow shaft.

[0012] Preferably, baffles are arranged in a ring on the inner wall of the material throwing disc.

[0013] Preferably, a sealing ring is fitted onto the outer wall of the hollow shaft, forming a seal between the sealing ring and the dust collector, and the thickness of the sealing ring gradually decreases outward.

[0014] Preferably, a first sealing ring is fitted on the inner wall of the hollow shaft near the top position, and a seal is formed between the first sealing ring and the connecting pipe. The thickness of the first sealing ring gradually decreases towards the connecting pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This device uses centrifugal force to throw rice grains from a height. Under the action of negative pressure, dust particles are separated and sucked in. Friction between rice grains and contact between rice grains and inner mesh cause dust particles to fall off, which helps to adsorb dust particles and prevents rice grains from being sucked in by negative pressure. This device has a simple structure, low cost, and is suitable for widespread use. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the device;

[0018] Figure 2 This is a sectional view at point A;

[0019] Figure 3 This is a half-sectional view of the material throwing device. Detailed Implementation

[0020] 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.

[0021] Please refer to Figure 1 and Figure 2 As shown, this utility model is a rice dust removal device, including a hoist 1 and a dust collection tank 2. The hoist 1 lifts rice from the ground to the upper part of the dust collection tank 2. A conical collecting hopper 21 is fixed to the lower end of the dust collection tank 2. A discharge channel 22 is welded to the bottom of the collecting hopper 21 and is inclined. A throwing device 3 is installed at the axis of the dust collection tank 2. The rice lifted by the hoist 1 falls into the throwing device 3. A negative pressure fan 4 is fixed to the outer wall of the dust collection tank 1. The negative pressure fan 4 is connected to an exhaust pipe 41 and an air supply pipe 42. The exhaust pipe 41 is inserted into the dust collection tank 2 and is located near the top of the dust collection tank 2. A dust collection bag 43 is detachably installed on the air supply pipe 42. An inner baffle 5 is fixed to the top of the dust collection tank 2. The distance between the inner baffle 5 and the inner wall of the dust collection tank 2 is 2cm to 4cm. The exhaust pipe 41 is located outside the inner baffle 5. The rice grains thrown out by the throwing device 3 are blocked by the inner baffle 5.

[0022] In the above technical solution, the rice grains are thrown out by the rotation of the throwing device 3. The thrown rice grains fall from the high point of the dust collection tank and come into contact with the inner baffle 5, so that the fine particles attached to the surface of the rice are further shaken off. By the operation of the negative pressure fan 4, a negative pressure is formed on the outside of the inner baffle 5 to collect the separated dust particles.

[0023] Meanwhile, thanks to the inner baffle 5, rice grains can be prevented from being sucked in by negative pressure.

[0024] The mesh size of the inner baffle 5 is determined based on the particle size of the rice being processed, and the mesh size is slightly smaller than the particle size of the rice being processed.

[0025] See Figure 1 and Figure 3As shown, the material throwing device 3 includes a motor 31, a hollow shaft 32, a material throwing disc 33, and a connecting pipe 34. The motor 31 is fixed to the outside of the dust collection tank 2. The hollow shaft 32 is inserted from the center of the dust collection tank 2. A bearing 321 is fitted between the hollow shaft 32 and the dust collection tank 2. A transmission unit 311 is fitted between the hollow shaft 32 and the motor 31. The material throwing disc 33 is fixed to the lower end of the hollow shaft 32. Multiple discharge slots 322 are arranged in a ring at the lower end of the hollow shaft 32. A bracket 341 is fixed between the connecting pipe 34 and the dust collection tank 2. The lower end of the connecting pipe 34 is inserted into the hollow shaft 32. The other end of the connecting pipe 34 is curved and connected to the elevator 1. The rice lifted by the elevator 1 enters the hollow shaft 32 through the connecting pipe 34.

[0026] In the above technical solution, rice fed into the hollow shaft 32 through the connecting pipe 34 falls into the throwing disc 33. The motor 31 provides driving force, causing the hollow shaft 32 to rotate at a speed greater than 200 revolutions per minute. The rice particles entering the throwing disc 33 are centrifugally thrown out under the action of centrifugal force. During the throwing process, the mutual friction between the rice particles and the impact between the rice particles and the inner baffle 5 cause the particles in the rice to be dusted. The dust particles are extracted by the negative pressure fan, thus achieving the dust removal of rice particles.

[0027] The transmission unit 311 is one of chain drive, gear drive, or belt drive.

[0028] In this embodiment, the transmission unit 311 uses belt drive, specifically a synchronous toothed belt.

[0029] See Figure 3 As shown, the material throwing disc 33 is conical, and its diameter gradually decreases upwards.

[0030] The cone-shaped feeding disc 33, during rotation, centrifugally flings rice grains upwards and outwards, increasing the falling height of the rice grains.

[0031] See Figure 3 As shown, a cone-shaped dispersing cone 3331 is formed by protruding upward at the axis of the throwing disc 33, and the dispersing cone 3331 is inserted upward into the hollow shaft 32.

[0032] This structural design allows rice grains to enter the feeding disc 33 more smoothly from the hollow shaft 32.

[0033] See Figure 3 As shown, baffles 3332 are distributed in a ring on the inner wall of the material throwing disc 33.

[0034] Using baffle plate 3332 allows centrifugal force to be applied to the rice more effectively.

[0035] See Figure 3 As shown, a sealing ring 399 is fitted on the outer wall of the hollow shaft 32, and a seal is formed between the sealing ring 399 and the dust collector 2. The thickness of the sealing ring gradually decreases outward.

[0036] See Figure 3 As shown, a first sealing ring 398 is fitted on the inner wall of the hollow shaft 32 near the top position. The first sealing ring 398 forms a seal with the connecting pipe 34, and the thickness of the first sealing ring gradually decreases towards the connecting pipe.

[0037] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0038] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rice dust removal device comprising an elevator and a dust removal tank, the elevator lifting rice from the ground to the upper end of the dust removal tank, the lower end of the dust removal tank being fixed with a conical material collecting hopper, the bottom of the material collecting hopper being welded with a discharge channel, the discharge channel being arranged obliquely, characterized in that, A material throwing device is installed at the center of the dust removal tank, the rice lifted by the elevator falls into the material throwing device, a negative pressure fan is fixed at the outer wall of the dust removal tank, the negative pressure fan is connected with an air suction pipe and an air supply pipe, the air suction pipe penetrates into the dust removal tank and is located at a position close to the top of the dust removal tank, a dust collecting bag is detachably installed at the air supply pipe, an inner blocking net is fixed at the inner top of the dust removal tank, the spacing between the inner blocking net and the inner wall of the dust removal tank is 2cm-4cm, the air suction pipe is located outside the inner blocking net, and the rice particles thrown out by the material throwing device are blocked by the inner blocking net.

2. The rice dust removing apparatus according to claim 1, wherein The material throwing device comprises a motor, a hollow shaft, a material throwing disc and a connecting pipe, the motor is fixed outside the dust removal tank, the hollow shaft is inserted from the center of the dust removal tank, a bearing is matched between the hollow shaft and the dust removal tank, a transmission unit is matched between the hollow shaft and the motor, the material throwing disc is fixed at the lower end of the hollow shaft, a plurality of discharge grooves are annularly arranged at the lower end of the hollow shaft, a support is fixed between the connecting pipe and the dust removal tank, the lower end of the connecting pipe is inserted into the hollow shaft, the other end of the connecting pipe is arc-bent and then butts against the elevator, and the rice lifted by the elevator enters the hollow shaft through the connecting pipe.

3. The rice dust removing apparatus according to claim 2, wherein The transmission unit is one of chain transmission unit, gear transmission and belt transmission.

4. The rice dust removing apparatus according to claim 2, wherein The material throwing disc is conical and its diameter gradually decreases upwards.

5. The rice dust removing apparatus according to claim 4, wherein A conical dispersion cone is protruded at the center of the material throwing disc and inserted into the hollow shaft upwards.

6. The rice dust removing apparatus according to claim 5, wherein A blocking piece is annularly arranged at the inner wall of the material throwing disc.

7. The rice dust removing apparatus according to claim 2, wherein A sealing ring is clamped at the outer wall of the hollow shaft, a seal is formed between the sealing ring and the dust removal tank, and the thickness of the sealing ring gradually decreases outwards.

8. The rice dust removing apparatus according to claim 2, wherein A first sealing ring is clamped at the inner wall of the hollow shaft close to the top, a seal is formed between the first sealing ring and the connecting pipe, and the thickness of the first sealing ring gradually decreases towards the connecting pipe.

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