Dust removal equipment for rice processing

Abstract

The invention relates to the technical field of rice processing, in particular to dust removal equipment for rice processing, which comprises a rack and a dust removal box, the dust removal box is rotatably arranged on the machine frame around an axis X, a first material cavity and a second material cavity which are distributed on the two sides of the axis X are defined in the dust removal box and connected through a channel, an air inlet cavity and an air outlet cavity are formed in the two sides of the channel respectively, and an openable rice inlet and outlet is formed in the air inlet cavity and / or the air outlet cavity. The air inlet end of the air inlet cavity is connected with an air blowing source, the middle of the air exhaust end of the air exhaust cavity is connected with an air draft source through an air exhaust pipe, and an impact anti-backflow structure is arranged in the air exhaust cavity and can collide with rice so that the rice can be dispersed with dust on the surface of the rice. Meanwhile, broken rice can be prevented from flowing back to the channel from the exhaust cavity in the rotating process of the dust removal box. Repeated dust removal and independent collection of broken rice can be facilitated, and the rice dust removal quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rice processing, and particularly to a dust removal device for rice processing. Background Art

[0002] Polishing is one of the processes for cleaning rice. Appropriate polishing can gelatinize the starch on the surface of rice grains, presenting a certain luster. However, the surface of polished rice will carry the dust generated during the polishing process. If not cleaned in time, it will affect the quality of rice.

[0003] A patent with the Chinese patent publication number CN106238325 discloses a dust removal device for rice processing, including a dust removal box, a blowing cavity and a suction cavity. The blowing cavity and the suction cavity are respectively arranged on two opposite sides of the dust removal box; a funnel-shaped feed inlet is provided at the upper end of the dust removal box, and a discharge outlet is provided at the lower end of the dust removal box; the blowing cavity is connected to a blowing source, and the suction cavity is connected to a suction source. The diameter of the connection port between the suction cavity and the dust removal box is smaller than the diameter of the free port of the suction cavity; the suction cavity includes a top plate and a bottom plate that can prevent rice from flying out. The bottom plate is hinged to the corresponding side of the dust removal box. A spring is provided between the top plate and the bottom plate, and a pushing device for driving the bottom plate is provided on the bottom plate. The pushing device is fixedly connected to the bottom plate; a channel corresponding to the feed inlet is provided between the blowing cavity and the suction cavity, and a cavity communicating with the channel is provided below the blowing cavity and the suction cavity. A fan is provided in the cavity, and the position of the fan corresponds to the channel. This dust removal device for rice processing can not only effectively avoid the accumulation of dust in the dust collector, but also has a better dust removal effect.

[0004] However, although the above device solves the problem of dust accumulation in the dust collector, it still has at least the following problems: First, when the rice falling into the cavity needs to be dusted again due to incomplete dust removal, the rice must be added to the feed inlet again, which is rather troublesome to operate. Second, since the rice will hit the bottom plate of the suction cavity when passing through the channel, although this will make the separation of dust and rice faster, it will more or less produce some broken rice. And the above dust removal device lacks a structure for separately collecting these broken rice, resulting in the mixing of broken rice and dust and being unable to be separated.

[0005] In view of the above problems, the present invention proposes a dust removal device for rice processing that is convenient for multiple dust removals and can separately collect broken rice. Summary of the Invention

[0006] The purpose of the present invention is to provide a dust removal device for rice processing to solve the problems that the existing dust removal devices are not convenient for multiple dust removals and cannot separately collect broken rice.

[0007] The present invention is achieved through the following technical solutions: A dust removal device for rice processing, comprising a frame and a dust removal box; the dust removal box is rotatably arranged on the frame around an axis X, a first material cavity and a second material cavity are defined in the dust removal box and distributed on both sides of the axis X, a channel is connected between the first material cavity and the second material cavity, an air inlet cavity and an exhaust cavity are respectively arranged on both sides of the channel, an openable and closable rice inlet and outlet is arranged at the air inlet cavity and / or the exhaust cavity, the air inlet end of the air inlet cavity is connected to a blowing source, the middle of the exhaust end of the exhaust cavity is connected to a suction source through an exhaust pipe, an impact anti-backflow structure is arranged in the exhaust cavity, and the impact anti-backflow structure can collide with rice to disperse the rice and the dust on its surface, and at the same time can also limit the broken rice from flowing back from the exhaust cavity to the channel during the rotation of the dust removal box.

[0008] Optionally, the impact anti-backflow structure is two impact plates arranged on both sides of the air inlet end of the exhaust cavity, the two impact plates are arranged along the length direction of the channel, and the free ends of the two impact plates both extend towards the exhaust end of the exhaust cavity and close to the middle position of the channel to divide the exhaust cavity into a broken rice collection area and a conical impact area.

[0009] Optionally, four partition plates are arranged in the dust removal box, and the four partition plates divide the interior of the dust removal box into four cavities with a conical structure, and the four cavities are respectively the first material cavity, the second material cavity, the air inlet cavity and the exhaust cavity; the channels are jointly formed between the small ends of the four cavities.

[0010] Optionally, an openable and closable broken material outlet is arranged on the dust removal box, and the broken material outlet is arranged at a position close to the large end of the exhaust cavity.

[0011] Optionally, a conical bottom plate protrudes outwards at the position of the dust removal box corresponding to the first material cavity, and the rice inlet and outlet is arranged at the small end position of the bottom plate.

[0012] Optionally, two support parts are arranged on the frame at intervals, the exhaust pipe is pivotally connected to one of the support parts, an air inlet pipe connected to the air inlet end of the air inlet cavity is arranged on the dust removal box, the air inlet pipe is coaxially arranged with the exhaust pipe and pivotally connected to the other support part, and the air inlet end of the air inlet cavity is connected to the blowing source through the air inlet pipe.

[0013] Optionally, a driving source for driving the dust removal box to rotate around the axis X is arranged on the frame.

[0014] Optionally, one side of each of the first material chamber and the second material chamber opposite to each other is a material dropping opening, the channel connects the two material dropping openings, the dust removal device further includes a material dropping assembly, the material dropping assembly includes two discharging rods respectively arranged at the two material dropping openings, the two discharging rods are movable along the length direction of the channel, the outer surface of the discharging rod is recessed to form uniformly distributed depressions, the discharging rod can rotate around its own axis, and the diameter of the discharging rod is adapted to the width of the material dropping opening.

[0015] Optionally, the distance between the two discharging rods is fixed, so that the two discharging rods can move synchronously along the length direction of the channel, and the distance between the two discharging rods is greater than the length of the channel.

[0016] Optionally, a long through hole is formed in the side wall of the dust removal box along the length direction of the channel, the material dropping assembly further includes a connecting plate, a connecting shaft and a linear driving device, the connecting plate and the linear driving device are both located outside the dust removal box, one end of the connecting shaft is fixed to the end of the discharging rod, and the other end passes through the long through hole and is rotatably connected to the connecting plate, the linear driving device is used to drive the connecting plate to move along the length direction of the channel, and the connecting plate always covers the long through hole when moving along the length direction of the channel.

[0017] Compared with the prior art, the present invention provides a dust removal device for rice processing, and has the following beneficial effects: 1. In the present invention, by rotating the dust removal box, the first material chamber is made higher than the second material chamber, rice is added to the first material chamber from the rice inlet and outlet, and the rice flows to the second material chamber through the channel under the action of gravity. During this period, the blowing source blows the dust into the exhaust chamber and is drawn away to achieve dust removal. If the dust removal is not thorough, the positions of the two material chambers can be interchanged by rotating the dust removal box to make the rice flow back for dust removal again. When the rice passes through the channel, it undergoes lateral displacement under the action of gravity and air flow, collides with the inclined impact plate to shake off the dust, the intact rice slides down along the plate, and the dust enters the exhaust chamber and is drawn away. The broken rice generated by the collision has a weight between that of the intact rice and the dust, and is blown into the broken rice collection area of the exhaust chamber by the air flow for separate collection. During the process of rotating the dust removal box, the conical impact area formed by the two free ends approaching each other can limit the backflow of the broken rice from the exhaust chamber to the channel, avoiding mixing into the intact rice and improving the quality of the rice after dust removal; 2. The first material chamber, the second material chamber, the air inlet chamber, the exhaust chamber and the channel of the present invention are only separated by four partition plates in the dust removal box, which not only retains the conical shapes and respective functions of the four chambers, but also makes full use of the internal space of the dust removal box. Compared with the prior art, it has the advantages of compact structure and reasonable space layout; 3. The present invention is provided with a blanking component. Through the blanking component, rice in the material cavity can be evenly discharged into the channel. Moreover, when the positions of the two material cavities are switched, the blanking port of the upper material cavity can be blocked by moving the blanking rod, and rice in the upper material cavity can be evenly discharged into the channel by rotating the blanking rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic perspective structure diagram of the present invention without the blanking component; Figure 2 of the present invention Figure 1 schematic front view structure diagram; Figure 3 of the present invention Figure 1 schematic front view sectional structure diagram; Figure 4 is a schematic perspective structure diagram of the present invention including the blanking component; Figure 5 of the present invention Figure 4 schematic front view sectional structure diagram; Figure 6 is a schematic structure diagram of the blanking component of the present invention.

[0019] In the figures: 100, frame; 110, support part; 200, dust removal box; 201, rice inlet and outlet; 202, broken material outlet; 203, door panel; 204, bottom plate; 205, intake pipe; 206, exhaust pipe; 207, impact plate; 208, partition plate; 210, first material cavity; 220, second material cavity; 230, channel; 240, intake cavity; 250, exhaust cavity; 251, broken rice collection area; 252, impact area; 260, long through hole; 300, belt conveyor; 400, vibration source; 500, drive source; 510, first motor; 520, driving gear; 530, driven gear; 600, blanking component; 610, blanking rod; 611, depression; 620, connecting plate; 630, connecting shaft; 640, linear driving device; 650, second motor; 700, blowing source; 800, air extraction source. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment: Please refer to Figures 1 to 3, according to an embodiment of the present invention, a dust removal device for rice processing is provided, including a frame 100 and a dust removal box 200; the dust removal box 200 is rotatably arranged on the frame 100 around an axis X. A first material chamber 210 and a second material chamber 220 are defined in the dust removal box 200, which are distributed on both sides of the axis X. The first material chamber 210 and the second material chamber 220 are connected by a channel 230. An air inlet chamber 240 and an exhaust chamber 250 are respectively arranged on both sides of the channel 230. An openable and closable rice inlet and outlet 201 is arranged at the air inlet chamber 240 and / or the exhaust chamber 250. Through the rice inlet and outlet 201, rice to be dust-removed can be added into the dust removal box 200. The air inlet end of the air inlet chamber 240 is connected to a blowing source 700, and the middle of the exhaust end of the exhaust chamber 250 is connected to an air extraction source 800 through an exhaust pipe 206. An impact anti-backflow structure is arranged in the exhaust chamber 250. The impact anti-backflow structure is two impact plates 207 arranged on both sides of the air inlet end of the exhaust chamber 250. The two impact plates 207 are arranged along the length direction of the channel 230. The free ends of the two impact plates 207 both extend towards the exhaust end of the exhaust chamber 250 and close to the middle position of the channel 230, so as to divide the exhaust chamber 250 into a broken rice collection area 251 and a conical impact area 252. Specifically in this embodiment, the rice inlet and outlet 201 is only arranged on the first material chamber 210, and the opening and closing of the rice inlet and outlet 201 are realized by a valve. Both the blowing source 700 and the air extraction source 800 can be devices such as a blower or a fan that can form a wind pressure difference and drive air flow. The air inlet end of the air inlet chamber 240 is connected to the end with higher wind pressure of the blowing source 700 for introducing air flow into the air inlet chamber 240; while the exhaust pipe 206 is connected to the end with lower wind pressure of the air extraction source 800 to discharge the air in the exhaust chamber 250 by negative pressure. The air inlet end of the air inlet chamber 240 refers to the side where air enters when the air flow passes through the air inlet chamber 240, and the air outlet end of the air inlet chamber 240 refers to the side where air exits when the air flow passes through the air inlet chamber 240. Similarly, the air inlet end of the exhaust chamber 250 refers to the side where air enters when the air flow passes through the exhaust chamber 250, and the air outlet end of the exhaust chamber 250 refers to the side where air exits when the air flow passes through the exhaust chamber 250.

[0022] For the dust removal equipment used in rice processing with the above structure, rotate the dust removal box 200 to make the first material chamber 210 higher than the second material chamber 220. Then, add the rice to be dust-removed into the first material chamber 210 through the rice inlet and outlet 201. The rice in the first material chamber 210 flows to the second material chamber 220 through the channel 230 under the action of gravity. During this period, the air blowing source 700 will blow the dust in the rice flowing through the channel 230 into the exhaust chamber 250 and be taken away by the air extraction source 800, thus achieving the effect of rice dust removal. When all the rice is discharged into the second material chamber 220 and it is found that the rice dust removal is not thorough enough, only need to rotate the dust removal box 200 to replace the positions of the first material chamber 210 and the second material chamber 220, so that the rice can flow back into the first material chamber 210. The rice will be dust-removed again when it flows back. Repeating this way, it can simply achieve multiple dust removals of the rice until the rice is thoroughly dust-removed. In addition, when the rice passes through the channel 230, it will generate a lateral displacement under the action of its own gravity and the air flow, and collide with the impact plate 207 located below the impact area 252 in the impact area 252. The collision will shake off the dust on the surface of the rice, achieving a better dust removal effect. Since the impact plate 207 is an inclined plate, the relatively intact rice grains after colliding with the impact plate 207 will slide down along the surface of the impact plate 207 to the material chamber (the first material chamber 210 or the second material chamber 220), while the dust will first enter the exhaust chamber 250 and then be directly taken away by the exhaust pipe 206. Of course, the impact will also cause some rice grains to break, thus generating some broken rice. These broken rice grains are lighter than the intact rice, but heavier than the shaken-off dust. Therefore, these broken rice grains will be blown into the broken rice collection area 251 in the exhaust chamber 250 and collected, so as to realize the separate collection of the broken rice and prevent the broken rice from being mixed with the dust. At the same time, during the process of rotating the dust removal box 200 for multiple dust removals, as the dust removal box 200 rotates, the broken rice will also flow back and forth in the broken rice collection area 251. Since the free ends of the two impact plates 207 gradually approach each other, a conical impact area 252 is formed. The diameter of the air inlet of the impact area 252 to the air outlet of the impact area 252 gradually decreases, so that the impact plate 207 can better restrict the broken rice in the broken rice collection area 251 from flowing back to the channel 230 from the exhaust chamber 250, preventing the broken rice from being mixed into the relatively intact rice grains, and thus improving the quality of the rice after dust removal. It is worth mentioning that since the two impact plates 207 are arranged on both sides of the air inlet end of the exhaust chamber 250 along the length direction of the channel 230, whether the rice in the first material chamber 210 or the second material chamber 220 falls into the channel 230, there will be an impact plate 207 located below the impact area 252 that collides with the rice and prevents the rice from flowing back to the channel 230 from the broken rice collection area 251.

[0023] In the patent with the patent publication number CN106238325, the spatial layout of the feed inlet, the air blowing chamber, and the air suction chamber on the dust removal box 200 is not reasonable enough, and the internal space of the dust removal box 200 is not fully utilized, resulting in the problem that the overall volume of the above dust removal device is too large. Therefore, in some embodiments, such as Figure 3 As shown, four partitions 208 are provided inside the dust removal box 200. The four partitions 208 divide the interior of the dust removal box 200 into four cavities with a conical structure. The four cavities are respectively a first material chamber 210, a second material chamber 220, an air inlet chamber 240, and an exhaust chamber 250; a passage 230 is formed jointly between the small ends of the four cavities. Specifically in this embodiment, the four partitions 208 include a first partition, a second partition, a third partition, and a fourth partition. A first material chamber 210 is formed between the first partition, the second partition, and the inner wall of the dust removal box 200. A second material chamber 220 is formed between the third partition, the fourth partition, and the inner wall of the dust removal box 200. An air inlet chamber 240 is formed between the first partition, the third partition, and the inner wall of the dust removal box 200. An exhaust chamber 250 is formed between the second partition, the fourth partition, and the inner wall of the dust removal box 200. Opposite ends of the first material chamber 210, the second material chamber 220, the air inlet chamber 240, and the exhaust chamber 250 jointly enclose the passage 230. It can be understood that the functions of the first material chamber 210 and the second material chamber 220 are to discharge rice into the passage 230 or collect the rice that falls from the passage 230. The conical first material chamber 210 and second material chamber 220 can enable the rice to better fall into the passage 230 with almost no residue, making the dust removal more thorough. The function of the air inlet chamber 240 is to direct the high-speed air flow generated by the air blowing source 700 to the passage 230, and the diameter of the air inlet end of the air inlet chamber 240 is larger than that of its air outlet end, which can increase the air flow speed when entering the passage 230, so as to achieve the purpose of better blowing off the dust on the surface of the rice. Most importantly, since these four cavities and the passage 230 are only separated and formed inside the dust removal box 200 by the four partitions 208, the internal space of the dust removal box 200 is fully utilized, and compared with the prior art, it has the advantages of a compact structure and a reasonable spatial layout.

[0024] In order to facilitate the removal of rice from the exhaust chamber 250, in some embodiments, such as Figures 1 to 3 As shown, an openable and closable crushing material outlet 202 is provided on the dust removal box 200. The crushing material outlet 202 is arranged at a position close to the large end of the exhaust chamber 250. Specifically in this embodiment, the opening and closing manner of the crushing material outlet 202 is to provide a door plate 203 at the position of the crushing material outlet 202. The door plate 203 is hinged to the upper end of the crushing material outlet 202. In order to facilitate the opening and closing of the door plate 203, a cylinder can also be connected between the door plate 203 and the dust removal box 200. Two ends of the cylinder are respectively pivotally connected between the door plate 203 and the dust removal box 200. In other embodiments, the opening and closing of the crushing material outlet 202 can also be controlled by installing a valve at the position of the crushing material outlet 202.

[0025] To facilitate the extraction of relatively intact rice after dust removal in the dust removal box 200, in some embodiments, as Figure 2 and Figure 3 shown, a conical bottom plate 204 is formed by protruding outward at the position of the dust removal box 200 corresponding to the first material cavity 210, and a rice inlet and outlet 201 is arranged at the small end position of the bottom plate 204. With this setting, when it is necessary to take out the rice in the dust removal box 200, rotate the dust removal box 200 so that the first material cavity 210 is located at the bottom of the dust removal box 200. At this time, open the rice inlet and outlet 201. Since the bottom plate 204 is conical, the rice can be smoothly discharged from the rice inlet and outlet 201. To facilitate the transportation of the discharged rice to the next process (such as bagging), a belt conveyor 300 is arranged at the bottom of the dust removal box 200, and the belt conveyor 300 can be used to transport the dust-removed rice to the next process.

[0026] In some embodiments, as Figures 1 to 3 shown, a vibration source 400 is arranged on the dust removal box 200, and the vibration source 400 can provide vibration for the dust removal box 200 when the dust removal equipment is working. Specifically in this embodiment, the vibration source 400 is a vibration motor, and the vibration motor is installed at the position of the dust removal box 200 corresponding to the second material cavity 220. Through the setting of the vibration source 400, when taking out the rice in the dust removal box 200, the speed of the rice discharged from the rice inlet and outlet 201 can be accelerated.

[0027] In some embodiments, as Figures 1 to 3 shown, the frame 100 has two support parts 110 arranged at intervals. The exhaust pipe 206 is pivotally connected to one of the support parts 110. An intake pipe 205 connected to the intake end of the intake cavity 240 is arranged on the dust removal box 200. The intake pipe 205 and the exhaust pipe 206 are coaxially arranged and pivotally connected to the other support part 110. The intake end of the intake cavity 240 is connected to a blowing source 700 through the intake pipe 205. Specifically in this embodiment, both between the exhaust pipe 206 and the support part 110 and between the intake pipe 205 and the support part 110 are connected by deep groove ball bearings, and the central axes of the exhaust pipe 206 and the intake pipe 205 are the axis X. With this setting, on the one hand, the exhaust pipe 206 and the intake pipe 205 can be used as part of the rotational connection between the dust removal box 200 and the frame 100 to support the dust removal box 200. On the other hand, the intake pipe 205 also serves as an intermediate medium for connecting the blowing source 700 to the intake cavity 240, and the exhaust pipe 206 also serves as an intermediate medium for connecting the exhaust source 800 to the exhaust cavity 250, providing a necessary passage 230 for the flow of air.

[0028] In some embodiments, as Figures 1 to 3As shown in the figure, a driving source 500 for driving the dust removal box 200 to rotate around the axis X is provided on the frame 100. The driving source 500 can be in a pneumatic form, a hydraulic form or an electric form. When the driving source 500 is in an electric form, the driving source 500 includes a first motor 510 and a transmission component. The first motor 510 can be installed on one of the support parts 110. When the first motor 510 is installed on the support part 110 connected to the intake pipe 205, the output shaft of the first motor 510 can be in transmission connection with the intake pipe 205 through the transmission component. When the first motor 510 is installed on the support part 110 connected to the exhaust pipe 206, the output shaft of the first motor 510 is in transmission connection with the exhaust pipe 206 through the transmission component. Further, the transmission component is a driving gear 520 and a driven gear 530. The driving gear 520 is fixedly installed on the output shaft of the first motor 510, and the driven gear 530 is fixedly installed on the exhaust pipe 206 or the intake pipe 205. When the first motor 510 is started, the exhaust pipe 206 or the intake pipe 205 can be driven to rotate through the cooperation of the driving gear 520 and the driven gear 530, so as to achieve the purpose of driving the dust removal box 200 to rotate around the axis X.

[0029] In some embodiments, as Figures 4 to 6 shown, on the opposite sides of the first material chamber 210 and the second material chamber 220 are both material dropping openings. The channel 230 connects the two material dropping openings. The dust removal device further includes a material dropping component 600. The material dropping component 600 includes two discharging rods 610 respectively arranged at the two material dropping openings. The two discharging rods 610 are movable along the length direction of the channel 230. Concavities 611 evenly distributed are formed on the outer surface of the discharging rod 610. The discharging rod 610 can rotate around its own axis. The diameter of the discharging rod 610 is adapted to the width of the material dropping opening. By respectively arranging a discharging rod 610 at the material dropping opening positions of the two material chambers, and the position of the discharging rod 610 is movable along the length direction of the channel 230. In this way, when one of the material chambers is located above the other material chamber, one of the discharging rods 610 can be moved to the material dropping opening of the material chamber located above to block it, and then the discharging rod 610 is rotated to evenly discharge rice into the channel 230. At the same time, the other discharging rod 610 can be moved from the material dropping opening of the other material chamber to the middle position of this material chamber to open the material dropping opening of this material chamber, so as to ensure that the rice falling from the channel 230 can smoothly enter this material chamber. In addition, when the positions of the two material chambers are switched, the material dropping opening of the material chamber located above can be blocked by moving the discharging rod 610, and the material chamber located above can be made to evenly discharge rice into the channel 230 by rotating the discharging rod 610. That is to say, the material dropping component 600 with the above structure can be well applied to the dust removal box 200 where the positions of the two material chambers can be switched arbitrarily.

[0030] It should be noted that the uniform discharge of rice is achieved through the recesses 611 on the discharge rod 610. Specifically, during the rotation of the discharge rod 610, when the recess 611 faces the first material chamber 210, the rice will fall into the recess 611. As the discharge rod 610 rotates, the recess 611 filled with rice will move towards the channel 230. Eventually, the rice will fall from the recess 611 into the channel 230. Since the recesses 611 on the blanking rod are evenly distributed, as long as the discharge rod 610 is controlled to rotate at a constant speed, the rice in the first material chamber 210 can be uniformly discharged into the channel 230.

[0031] In some embodiments, as Figure 4 shown, the distance between the two discharge rods 610 is fixed so that the two discharge rods 610 can move synchronously along the length direction of the channel 230, and the distance between the two discharge rods 610 is greater than the length of the channel 230. With this setting, when one discharge rod 610 blocks the blanking port of one material chamber, the other discharge rod 610 will necessarily move away from the blanking port of the other material chamber. Without separately controlling the positions of the two discharge rods 610, the dust removal box 200 that needs to frequently switch the positions of the two material chambers to achieve repeated dust removal can be well adapted.

[0032] In some embodiments, as Figure 5 and Figure 6 shown, a long through hole 260 is formed in the side wall of the dust removal box 200 along the length direction of the channel 230. The blanking assembly 600 further includes a connecting plate 620, a connecting shaft 630, and a linear driving device 640. The connecting plate 620 and the linear driving device 640 are both located outside the dust removal box 200. One end of the connecting shaft 630 is fixedly connected to the end of the discharge rod 610, and the other end passes through the long through hole 260 and is rotatably connected to the connecting plate 620. The linear driving device 640 is used to drive the connecting plate 620 to move along the length direction of the channel 230, and the connecting plate 620 always covers the long through hole 260 when moving along the length direction of the channel 230. Specifically in this embodiment, the linear driving device 640 is a cylinder. The cylinder body of the cylinder is fixed outside the dust removal box 200, and the output shaft of the cylinder is fixedly connected to the connecting plate 620. The expansion and contraction of the cylinder can drive the connecting plate 620 to move along the length direction of the channel 230. In order to drive the discharge rod 610 to rotate, a second motor 650 is installed on the connecting plate 620, and the output shaft of the second motor 650 is coaxially fixed to the connecting shaft 630. It can be understood that by arranging the connecting plate 620 and the linear driving device 640 outside the dust removal box 200, the occupation of the internal space of the dust removal box 200 can be reduced. And by using the connecting plate 620 to cover the long through hole 260, dust or rice can be prevented from leaking out from the long through hole 260.

[0033] Working principle: During use, the dust removal box 200 is rotated by the driving source 500 to make the first material cavity 210 higher than the second material cavity 220. The rice to be dust-removed is added to the first material cavity 210 through the rice inlet and outlet 201. The rice flows to the second material cavity 220 through the channel 230. During this period, the blowing source 700 blows the dust in the rice flowing through the channel 230 into the exhaust cavity 250, and is exhausted by the exhaust source 800 to achieve dust removal. If the dust removal is not thorough after all the rice is discharged into the second material cavity 220, the dust removal box 200 is rotated to exchange the positions of the two material cavities, so that the rice flows back to the first material cavity 210 for dust removal again, and thorough dust removal is achieved after multiple repetitions. When the rice passes through the channel 230, its own gravity and air flow cause it to have a lateral displacement, and it collides with the impact plate 207 inclined at the lower part in the impact area 252, shaking off the surface dust. The intact rice grains slide down along the impact plate 207 into the material cavity below. The dust first enters the exhaust cavity 250 and is then exhausted by the exhaust pipe 206. The broken rice generated by the impact has a weight between that of the intact rice and the dust, and the broken rice blown into the exhaust cavity 250 is collected separately in the broken rice collection area 251. When the dust removal box 200 rotates, the broken rice flows in the collection area, and the two impact plates 207 with free ends gradually approaching to form a conical impact area 252 have a reduced diameter from the air inlet to the air outlet, which can limit the return of the broken rice from the exhaust cavity 250 to the channel 230 and avoid mixing into the intact rice to improve the quality of the rice.

[0034] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust removal device for rice processing, characterized in that, It includes a frame (100) and a dust removal box (200); the dust removal box (200) is rotatably arranged on the frame (100) around an axis X. A first material cavity (210) and a second material cavity (220) are defined in the dust removal box (200) and are distributed on both sides of the axis X. The first material cavity (210) and the second material cavity (220) are connected by a channel (230). An air inlet cavity (240) and an exhaust cavity (250) are respectively arranged on both sides of the channel (230). A rice inlet and outlet (201) that can be opened and closed is arranged at the air inlet cavity (240) and / or the exhaust cavity (250). The air inlet end of the air inlet cavity (240) is connected to a blowing source (700). The middle of the exhaust end of the exhaust cavity (250) is connected to an air extraction source (800) through an exhaust pipe (206). An impact anti-backflow structure is arranged in the exhaust cavity (250). The impact anti-backflow structure can collide with rice to disperse the rice and the dust on its surface, and at the same time can also limit the broken rice from flowing back from the exhaust cavity (250) to the channel (230) during the rotation of the dust removal box (200).

2. The dust removal equipment for rice processing according to claim 1, characterized in that: The impact anti-backflow structure is two impact plates (207) arranged on both sides of the air inlet end of the exhaust cavity (250). The two impact plates (207) are arranged along the length direction of the channel (230). The free ends of the two impact plates (207) both extend towards the exhaust end of the exhaust cavity (250) and close to the middle position of the channel (230), so as to divide the exhaust cavity (250) into a broken rice collection area (251) and an impact area (252) with a conical structure.

3. The dust removal equipment for rice processing according to claim 1, characterized in that: Four partition plates (208) are arranged in the dust removal box (200). The four partition plates (208) divide the interior of the dust removal box (200) into four cavities with a conical structure. The four cavities are respectively the first material cavity (210), the second material cavity (220), the air inlet cavity (240) and the exhaust cavity (250); the small ends of the four cavities together form the channel (230).

4. The dust removal device for rice processing according to claim 3, wherein: A broken material outlet (202) that can be opened and closed is arranged on the dust removal box (200). The broken material outlet (202) is arranged at a position close to the large end of the exhaust cavity (250).

5. The dust removal device for rice processing according to claim 1, characterized in that: A conical bottom plate (204) protrudes outwards at the position of the dust removal box (200) corresponding to the first material cavity (210). The rice inlet and outlet (201) is arranged at the small end position of the bottom plate (204).

6. The dust removal device for rice processing according to claim 1, characterized in that: There are two support parts (110) arranged at intervals on the frame (100). The exhaust pipe (206) is pivotally connected to one of the support parts (110). An air inlet pipe (205) connected to the air inlet end of the air inlet cavity (240) is arranged on the dust removal box (200). The air inlet pipe (205) and the exhaust pipe (206) are coaxially arranged and pivotally connected to the other support part (110). The air inlet end of the air inlet cavity (240) is connected to the blowing source (700) through the air inlet pipe (205).

7. The dust removal device for rice processing according to claim 1, wherein: A driving source (500) for driving the dust removal box (200) to rotate about the axis X is provided on the frame (100).

8. The dust removal device for rice processing according to any one of claims 1 to 7, characterized in that: On the opposite sides of the first material cavity (210) and the second material cavity (220) are blanking ports. The channel (230) connects the two blanking ports. The dust removal device further includes a blanking assembly (600). The blanking assembly (600) includes two discharge rods (610) respectively arranged at the two blanking ports. The two discharge rods (610) are movable along the length direction of the channel (230). Concavities (611) evenly distributed are formed in the outer surface of the discharge rod (610). The discharge rod (610) can rotate about its own axis. The diameter of the discharge rod (610) is adapted to the width of the blanking port.

9. The dust removal device for rice processing according to claim 8, characterized in that: The distance between the two discharge rods (610) is fixed so that the two discharge rods (610) can move synchronously along the length direction of the channel (230), and the distance between the two discharge rods (610) is greater than the length of the channel (230).

10. The dust removal device for rice processing according to claim 9, characterized in that: A long through hole (260) is formed in the side wall of the dust removal box (200) along the length direction of the channel (230). The blanking assembly (600) further includes a connecting plate (620), a connecting shaft (630) and a linear driving device (640). The connecting plate (620) and the linear driving device (640) are both located outside the dust removal box (200). One end of the connecting shaft (630) is fixed to the end of the discharge rod (610), and the other end passes through the long through hole (260) and is rotatably connected to the connecting plate (620). The linear driving device (640) is used to drive the connecting plate (620) to move along the length direction of the channel (230). The connecting plate (620) always covers the long through hole (260) when moving along the length direction of the channel (230).

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