A rice processing bran powder removal equipment

Abstract

The present invention relates to the technical field of rice screening, and specifically relates to a bran powder removal device for rice processing, which includes a machine chamber base, a screening machine; a rolling screening device; a wind screening device; a blast mechanism; and an auxiliary screening and collection device. By driving the screen cylinder to flip through the rolling screening device, the present invention adopts a rotatable screen cylinder mode, and then uses the rolling method to achieve the effect of removing bran powder by throwing it out. At the same time, there is friction between the rolling rice, further reducing the problem of bran powder sticking to the rice. The screening method of throwing out bran powder by rolling not only improves the screening efficiency of bran powder, but also because there is continuous contact friction between the rice during rolling, it achieves the problem of preventing bran powder from adhering to the rice, and then realizes the purpose of fully removing bran powder from the rice. Then, the blast mechanism is used to perform secondary wind screening on the rice in the wind screening device, thereby avoiding the problem of a small amount of bran powder continuing to adhere to the rice, and achieving the effect of fully removing bran powder.

Description

Technical Field

[0001] The invention relates to the technical field of rice screening, in particular to rice bran removal equipment. Background Art

[0002] Rice is made by rolling paddy, and rice bran is mixed in the rice. In order not to affect people's consumption and make the rice quality better, it is necessary to separate and screen the rice bran, broken grains and full rice. In the current technology, the rice containing rice bran and broken grains is directly poured into the sieve and manually screened, which is not efficient and not suitable for large-scale rice processing and production, affecting the need for rapid production; however, there is also a rice bran screening device, which generally uses an exhaust fan to generate wind force to blow up light impurities such as rice bran to separate them from the rice, but the screening sieve itself cannot move, and the rice piled on the sieve often causes the sieve mesh to be blocked, and the wind force is difficult to blow the rice bran and the light broken grains pressed by the rice, resulting in poor rice screening effect, and the blown rice bran cannot be well collected, and it is troublesome to clean after screening, and part of the rice bran may adhere to the surface of the rice during rolling, and the rice bran adhering to the rice cannot be screened out by manual screening and wind selection alone.

[0003] A rice processing and screening device disclosed in Chinese patent publication number CN111195603B comprises a screening cylinder, a first sealing cover is sealedly connected to the left end of the screening cylinder, a second sealing cover is arranged at the right end of the screening cylinder, a stirring device is arranged inside the screening cylinder, support frames are arranged outside the left and right ends of the screening cylinder, support legs are fixedly connected to the front and rear sides of the lower end of the support frame, reinforcing ribs are fixedly connected between the left and right supporting legs, a discharge port is opened inside the lower end of the second sealing cover, a discharge pipe sealedly connected to the second sealing cover is arranged outside the discharge port, a mounting platform is fixedly connected to the right side of the upper end of the front and rear reinforcing ribs, a blower located at the lower side of the screening cylinder is fixedly connected to the upper end of the mounting platform, one end of an air outlet pipe is sealedly connected to the outer side of the air outlet end of the blower, the other end of the air outlet pipe is sealedly connected to the inner side of the middle end of the discharge pipe, one end of a dust collecting pipe is sealedly connected to the inner side of the right end of the discharge pipe, and a dust filtering device is sealedly connected to the other end of the dust collecting pipe.

[0004] Although the above patent can remove rice bran by friction between rice, the method of using a screw to transport and rub the rice is still too inefficient for removing bran powder. Even if the bran powder loses its adsorption effect on the rice due to the friction of the screw, it will still remain in the rice at that place. In the subsequent wind screening, there will be a problem of excessive bran powder base resulting in poor screening effect. If a large amount of bran powder can be screened during the transportation and friction of the rice, the overall rice bran powder screening effect and efficiency will be increased. In view of this, we propose a rice bran powder removal equipment for processing. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a rice bran powder removing device for rice processing, which solves the problems raised in the above-mentioned background art. To achieve the above objectives, the present invention is realized through the following technical solutions: A rice bran powder removing device for rice processing includes a machine chamber base, inside which a screening machine is fixedly installed. Inside the screening machine, a rolling screening device is provided. The rolling screening device includes a mesh sieve cylinder and a connecting head. Both ends of the mesh sieve cylinder rotate inside the screening machine. Inside the wall of the mesh sieve cylinder, a retention plate is fixedly connected. On the surface of the mesh sieve cylinder, a scraper is fixedly connected. Inside the connecting head, a spiral rod is slidably connected; a wind screening device, which is arranged at the feeding end of the screening machine; a blowing mechanism, which is arranged on the machine chamber base and is used to dock with the wind screening device to generate wind for the bran powder screening work; an auxiliary screening and collection device, which is arranged on the screening machine.

[0006] Preferably, at one end of the screening machine away from the wind screening device, a feeding hopper is fixedly connected. On the screening machine, there is a bran powder discharging port. The end of the connecting head is fixedly connected inside the screening machine. At one end of the screening machine near the feeding hopper, a feeding slope is provided.

[0007] Preferably, the rolling screening device further includes a driving motor, the surface of which is installed on the screening machine. The output shaft of the driving motor is connected to a double-headed tooth shaft, the surface of which meshes with the surface of the mesh sieve cylinder, and the surface of the double-headed tooth shaft rotates inside the screening machine.

[0008] Preferably, at both ends of the mesh sieve cylinder, cams are fixedly connected. Inside the connecting head, the spiral rod is fixedly connected with a connecting plate. Between the surface of the connecting plate and the inside of the connecting head, a spring is fixedly connected. At one end of the spiral rod near the feeding hopper, a convex disk is fixedly connected.

[0009] Preferably, the surface of the convex disk slides inside the screening machine. On one side of the convex disk away from the spiral rod, a magnetic ring one is fixedly connected. One end of the magnetic ring one is magnetically connected to a magnetic ring two, and the end of the magnetic ring two is fixedly connected inside the screening machine.

[0010] Preferably, the wind screening device includes a discharging base, the surface of which is fixedly connected to the screening machine. Inside the discharging base, a pressure plate is elastically connected through a torsion spring. Between the surface of the pressure plate and the surface of the discharging base, a protective cover cloth is fixedly connected. On the discharging base, an air inlet, an air outlet and a rice discharging port are respectively provided. On the air outlet, an isolation net plate is fixedly connected. On the isolation net plate, an anti-blocking net brush is rotatably connected.

[0011] Preferably, the auxiliary screening and collecting device includes a collecting base, the surface of the collecting base is fixedly connected to the screening machine, an annular circulation base is fixedly connected to the collecting base, a one-way air outlet pipe is fixedly connected to the annular circulation base, the internal piston of the collecting base is connected to an air pressure plate, and a passive pressure rod is fixedly connected to the surface of the air pressure plate.

[0012] Preferably, the inner wall of the annular circulation base is fixedly connected to the surface of the screening machine, the end of the one-way air outlet pipe passes through the interior of the screening machine, a spring is fixedly connected between the surface of the air pressure plate and the inner wall of the collecting base, and the inner wall of the air pressure plate is slidably connected to the bottom end of the annular circulation base.

[0013] Preferably, a clearance groove is provided on the surface of the scraper at the passive pressure shaft rod, and a convex ring is provided on the clearance groove, and the convex ring is used to squeeze the passive pressure shaft rod.

[0014] Preferably, a pressure block is fixedly connected to one end of the anti-blocking mesh brush close to the air pressure plate, and a pressure rod is fixedly connected to the bottom of the air pressure plate, and the pressure rod is used to squeeze the pressure block.

[0015] It can be seen from the above technical solutions that the rice processing bran removal device provided in the embodiments of this specification has at least the following beneficial effects:

[0016] 1. The present invention drives the mesh drum to flip through a rolling screening device, adopts a rotatable mesh drum mode, and then utilizes a rolling method to achieve the effect of throwing out and removing bran powder. At the same time, there is friction between the rolling rice, which further reduces the problem of bran powder sticking to the rice. The screening method of rolling to throw out the bran powder not only improves the screening efficiency of the bran powder, but also because there is continuous contact friction between the rice during rolling, the problem of bran powder sticking to the rice is avoided, and the purpose of fully removing the bran powder from the rice is achieved. Then, the air blowing mechanism is used to perform secondary wind screening on the rice in the wind screening device, and then the problem of a small amount of bran powder continuing to stick to the rice is avoided, and the effect of fully removing the bran powder is achieved.

[0017] 2. The present invention provides a spiral rod capable of linear movement. During the rotation of the screen drum, a cam is used to squeeze the convex plate to drive the spiral rod to move. The spiral rod is then moved and reset by elastic force, so that the spiral rod continuously moves back and forth during the rolling of the screen drum. The spiral rod then contacts and rubs the rice while feeding the rice, thereby solving the problem of bran powder adhering to the rice and improving the effect of sieving bran powder from the rice.

[0018] 3. The present invention uses a wind screening device to block the flow of rice with two symmetrically distributed pressure plates. When the rice is fed, the pressure plates use the elastic force of the torsion springs thereon to achieve elastic blocking, so that the rice is in a small and evenly dispersed state during feeding. The air blowing mechanism continuously generates wind and discharges it from the air outlet, thereby achieving the effect of separating the rice and bran powder again by the air flow, and then avoiding the problem that a small amount of bran powder continues to adhere to the rice, achieving the effect of fully removing the bran powder. The wind drives the bran powder to flow through the air outlet into the collection base. The isolation net plate at the air outlet isolates some small rice grains, thereby preventing broken rice from seeping into the collection base dedicated to collecting bran powder. The anti-blocking net brush can rotate and clean the isolation net plate to avoid excessive blockage of the isolation net plate, which would otherwise affect the collection of bran powder at the air outlet.

[0019] 4. The present invention uses an auxiliary screening and collection device. The convex ring at the relief groove of the scraper intermittently presses the passive pressure shaft rod. During the up and down movement of the passive pressure shaft rod driving the air pressure plate, the air pressure plate generates positive and negative pressures in the collection base. When the air pressure plate generates positive pressure downward, the squeezed air flow is discharged through the annular flow base or the bran powder feeding port. The air flow discharged through the annular flow base is discharged to the top area inside the screening machine through the one-way air outlet pipe. The wind discharges from top to bottom inside the screening machine, further achieving the effect of wind feeding the bran powder. When the air pressure plate moves upward to generate negative pressure, the suction pressure can only act on the screening machine through the bran powder feeding port, thereby achieving the effect of quickly absorbing the bran powder using negative pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present invention and form a part of this application:

[0021] Figure 1 Schematic diagram of the overall structure of the present invention;

[0022] Figure 2 Schematic diagram of the internal structure of the screening machine in the present invention;

[0023] Figure 3 Schematic diagram of the internal structure of the screen cylinder in the present invention;

[0024] Figure 4 Schematic diagram of the screen cylinder structure of the present invention;

[0025] Figure 5 Schematic diagram of the screw rod structure of the present invention;

[0026] Figure 6 Schematic diagram of the screening machine of the present invention;

[0027] Figure 7 Schematic diagram of the wind screening device structure of the present invention;

[0028] Figure 8Schematic diagram of the anti-blocking mesh brush structure in the present invention;

[0029] Figure 9 Schematic diagram of the annular circulation base structure in the present invention;

[0030] Figure 10 Schematic diagram of the structure at the cam in the present invention;

[0031] Figure 11 Schematic diagram of the structure at the connecting plate in the present invention.

[0032] In the figure: 1, engine compartment base; 2, screening machine; 3, rolling screening device; 31, mesh sieve cylinder; 32, retention plate; 33, scraper; 331, relief groove; 332, convex ring; 34, connecting head; 35, screw rod; 36, driving motor; 37, double-headed tooth shaft; 38, cam; 39, connecting plate; 310, convex disk; 311, magnetic ring 1; 312, magnetic ring 2; 4, wind screening device; 41, blanking base; 42, pressure plate; 43, protective cover cloth; 44, air inlet; 45, air outlet; 46, rice blanking port; 47, isolation mesh plate; 48, anti-blocking mesh brush; 481, pressing block; 5, air blowing mechanism; 6, auxiliary screening and collection device; 61, collection base; 62, annular circulation base; 63, one-way air outlet pipe; 64, air pressure plate; 641, pressing rod; 65, passive pressing shaft rod; 7, feed hopper; 8, bran powder blanking port; 9, blanking slope. Detailed implementation manners

[0033] 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 of 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.

[0034] Please refer to Figure 1 - Figure 11As shown in the figure, a rice bran powder removal device for rice processing includes a machine chamber base 1. Inside the machine chamber base 1, a screening machine 2 is fixedly installed. Inside the screening machine 2, a rolling screening device 3 and a wind screening device 4 are provided. The wind screening device 4 is arranged at the discharging end of the screening machine 2 to perform secondary bran powder screening on the subsequent rice using wind power, thereby avoiding the problem of a small amount of bran powder continuing to adhere to the rice and achieving the effect of fully removing bran powder. One end of the screening machine 2 away from the wind screening device 4 is fixedly connected to a feed hopper 7. A bran powder discharging port 8 is provided on the screening machine 2. At one end of the screening machine 2 close to the feed hopper 7, a discharging slope 9 is provided. The rice that needs to have its bran powder removed is fed into the screening machine 2 through the feed hopper 7. The screening machine 2 is in a fixed state as a whole. The rice fed into the screening machine 2 is inclined and guided into the rolling screening device 3 under the influence of the discharging slope 9. The rolling screening device 3 adopts a rotatable mesh cylinder mode, thereby achieving the effect of removing bran powder by rolling. At the same time, there is friction between the rolling rice, further reducing the problem of bran powder sticking to the rice. The screening method of rolling out bran powder not only improves the screening efficiency of bran powder but also, because there is continuous contact friction between the rice during rolling, avoids the problem of bran powder adhering to the rice, thereby achieving the purpose of fully removing bran powder from the rice. A blowing mechanism 5 is arranged on the machine chamber base 1 and is used to dock with the wind screening device 4 to generate wind for bran powder screening work. The blowing mechanism 5 is an existing mechanism for generating wind to achieve bran powder screening. An auxiliary screening and collecting device 6 is arranged on the screening machine 2.

[0035] In this embodiment, the rolling screening device 3 includes a screen cylinder 31 and a connector 34. Both ends of the screen cylinder 31 are rotatably arranged inside the screening machine 2, and the end of the connector 34 is fixedly connected inside the screening machine 2. A bran powder screen is provided on the screen cylinder 31. The screen cylinder 31 can rotate inside the screening machine 2, and then the effect of removing bran powder is achieved by rolling the rice. Since a plurality of screen holes are provided on the screen cylinder 31, the effect of throwing the bran powder out of the cylinder can be achieved during the rolling, thus avoiding the problem of bran powder residue. At the same time, there is friction between the rolling rice grains, further reducing the problem of bran powder sticking to the rice. A retention plate 32 is fixedly connected to the inner wall of the screen cylinder 31. The setting of the retention plate 32 can better retain the rice during the rotation of the screen cylinder 31, thereby increasing the overall rotation amplitude of the rice and enabling it to tumble and screen the bran powder more fully. A scraper 33 is fixedly connected to the surface of the screen cylinder 31. The inside of the screening machine 2 is designed to have a large central cylinder diameter and small cylinder diameters at both ends, so that the thrown bran powder can be concentrated and dropped from both ends to the center, and then discharged into the auxiliary screening and collection device 6 from the bran powder feeding port 8. The rotating scraper 33 can, on the one hand, clean the inner wall of the screening machine 2, and on the other hand, achieve the effect of rotating and blowing air, using the wind force to further promote the feeding effect of the bran powder. A screw rod 35 is slidably connected inside the connector 34. When the screen cylinder 31 rotates, the screw rod 35 does not rotate. The rice located inside the screen cylinder 31 will be affected by the non-rotating screw rod 35 and continuously achieve automatic feeding. During the feeding process, it continues to tumble until it is discharged from the wind screening device 4. In order to avoid excessive wear of the rice by the screw rod 35, the outer edge of the screw rod 35 is designed to be made of a soft material (such as bristles, edible silica gel or edible rubber, etc.), further achieving the improvement of the bran powder removal efficiency while ensuring the quality of the rice. The rolling screening device 3 further includes a driving motor 36. The surface of the driving motor 36 is mounted on the screening machine 2. The output shaft of the driving motor 36 is connected to a double-headed tooth shaft 37. The surface of the double-headed tooth shaft 37 meshes with the surface of the screen cylinder 31, and the surface of the double-headed tooth shaft 37 is rotatably connected to the screening machine 2. By starting the driving motor 36, the output shaft of the driving motor 36 meshes with the screen cylinder 31 through the double-headed tooth shaft 37 to rotate and screen.

[0036] Furthermore, cams 38 are fixedly connected to both ends of the screen cylinder 31. A connecting plate 39 is fixedly connected to the inside of the screw rod 35 within the connecting head 34. A spring is fixedly connected between the surface of the connecting plate 39 and the inside of the connecting head 34. A convex disc 310 is fixedly connected to one end of the screw rod 35 close to the feed hopper 7. In the non-operating state, the screw rod 35 is initially positioned within the connecting head 34 by the elastic force of the spring on the connecting plate 39. During the rotation of the screen cylinder 31, multiple cams 38 arranged in a circular array at its end will intermittently press against the convex disc 310. The convex disc 310 will achieve a transverse movement after each press. The entire convex disc 310 will drive the screw rod 35 to move towards the feed hopper 7. When the pressing effect on the convex disc 310 is lost, the screw rod 35 will move back to its original position by using the elastic force. That is, during the rolling of the screen cylinder 31, it can drive the screw rod 35 to continuously move back and forth. During the movement of the screw rod 35, it can come into contact with and rub the rice again, thus solving the problem of bran powder adhering to the rice.

[0037] In addition, the surface of the convex disc 310 is slidably connected to the inside of the screening machine 2. A first magnetic ring 311 is fixedly connected to the side of the convex disc 310 away from the screw rod 35. One end of the first magnetic ring 311 is magnetically connected to a second magnetic ring 312. The end of the second magnetic ring 312 is fixedly connected to the inside of the screening machine 2. A magnetic repulsive force is generated between the first magnetic ring 311 and the second magnetic ring 312, which is used to reposition the screw rod 35 so that after its powered movement, it can be reset by the magnetic force again.

[0038] In addition, the wind screening device 4 includes a blanking base 41, the surface of the blanking base 41 is fixedly connected to the screening machine 2, and a pressure plate 42 is elastically connected inside the blanking base 41 through a torsion spring. The pressure plates 42 are arranged in two groups and symmetrically distributed inside the blanking base 41. After the rice is fed by rolling friction, it flows out inside the blanking base 41. The two symmetrically distributed pressure plates 42 block the flow of the rice. When the rice is being fed, the pressure plates 42 use the elastic force of the torsion springs thereon to achieve elastic blocking, so that the rice is in a small amount and evenly dispersed state during feeding. The air blowing mechanism 5 continuously generates wind and discharges it from the air outlet 45, thereby achieving the effect of separating the rice and bran powder again by the air flow, and then avoiding the problem that a small amount of bran powder continues to adhere to the rice, achieving the effect of fully removing the bran powder. A protective cover cloth 43 is fixedly connected between the surface of the pressure plate 42 and the surface of the blanking base 41. The protective cover cloth 43 is used to hermetically protect the groove for the rotation of the pressure plate 42 inside the blanking base 41. An air inlet 44, an air outlet 45 and a rice blanking port 46 are respectively formed on the blanking base 41. The air blowing mechanism 5 is connected to the air inlet 44. The air blowing mechanism 5 continuously generates wind and discharges it from the air outlet 45, thereby achieving the effect of separating the rice and bran powder again by the air flow. An isolation net plate 47 is fixedly connected to the air outlet 45. The isolation net plate 47 at the air outlet 45 isolates some small rice grains, thereby preventing broken rice from seeping into the collection base 61 dedicated to collecting bran powder. An anti-blocking net brush 48 is rotatably connected to the isolation net plate 47, and a pressing block 481 is fixedly connected to one end of the anti-blocking net brush 48 close to the air pressure plate 64.

[0039] It should be noted that the auxiliary screening and collection device 6 includes a collection base 61, the surface of the collection base 61 is fixedly connected to the screening machine 2, a circular circulation base 62 is fixedly connected to the collection base 61, a one-way air outlet pipe 63 is fixedly connected to the circular circulation base 62, a plurality of one-way air outlet pipes 63 are provided and are located in the top area of the circular circulation base 62. A pneumatic plate 64 is piston-connected inside the collection base 61. The area below the pneumatic plate 64 in the collection base 61 is set in a sealed state, and exhaust holes are provided in the area above the pneumatic plate 64. Thus, when the pneumatic plate 64 moves up and down, positive and negative pressures can be generated in the area below the pneumatic plate 64 in the collection base 61, and the area above the pneumatic plate 64 is not affected. A passive pressing shaft rod 65 is fixedly connected to the surface of the pneumatic plate 64. A relief groove 331 is provided on the surface of the scraper 33 at the position of the passive pressing shaft rod 65, and a convex ring 332 is provided on the relief groove 331. The convex ring 332 is used to squeeze the passive pressing shaft rod 65. During the rotation of the scraper 33, the convex ring 332 at the relief groove 331 thereof will intermittently squeeze the passive pressing shaft rod 65. After the passive pressing shaft rod 65 is squeezed, it moves downward. When the squeezing force is lost, the pneumatic plate 64 can be reset by the upper spring. During the process that the passive pressing shaft rod 65 drives the pneumatic plate 64 to move up and down, positive and negative pressures are generated by the pneumatic plate 64 in the collection base 61. When a positive pressure is generated downward by the pneumatic plate 64, the squeezed air flow is discharged through the circular circulation base 62 or the bran powder feeding port 8. The air flow discharged through the circular circulation base 62 is discharged into the interior of the screening machine 2 through the one-way air outlet pipe 63. Since a plurality of one-way air outlet pipes 63 are provided and are located in the upper area of the circular inner wall of the circular circulation base 62, the wind blows downward into the interior of the screening machine 2 from the plurality of one-way air outlet pipes 63, and the wind is discharged from top to bottom in the screening machine 2, further achieving the effect of wind feeding bran powder. When a negative pressure is generated when the pneumatic plate 64 moves upward, the suction pressure can only act on the interior of the screening machine 2 through the bran powder feeding port 8, thus achieving the effect of quickly absorbing bran powder by using negative pressure. The inner wall of the circular circulation base 62 is fixedly connected to the surface of the screening machine 2. The end of the one-way air outlet pipe 63 penetrates into the interior of the screening machine 2. A spring is fixedly connected between the surface of the pneumatic plate 64 and the inner wall of the collection base 61. The inner wall of the pneumatic plate 64 is slidably connected to the bottom end of the circular circulation base 62. A pressing rod 641 is fixedly connected to the bottom of the pneumatic plate 64. The pressing rod 641 is used to squeeze the pressing block 481. The continuously moving up and down pneumatic plate 64 can continuously squeeze the pressing block 481 through the pressing rod 641, thus achieving the effect of driving the anti-blocking mesh brush 48 on the pressing block 481 to rotate continuously. The rotating anti-blocking mesh brush 48 acts on the isolation mesh plate 47, further achieving the effect of rotating and cleaning the isolation mesh plate 47, avoiding excessive blockage of the isolation mesh plate 47, and thus affecting the effect of collecting bran powder at the air outlet 45.

[0040] When a rice bran and powder removal device of the present invention is in use, the rice that needs to have its bran and powder removed is fed into the screening machine 2 through the feed hopper 7. The screening machine 2 is in a fixed state as a whole. The rice fed into the screening machine 2 is inclined and guided into the screen cylinder 31 under the influence of the feeding slope 9. The screen cylinder 31 is provided with a bran and powder screen. The screen cylinder 31 can rotate within the screening machine 2, and then the effect of removing bran and powder is achieved by rolling the rice. Since a plurality of screen holes are provided on the screen cylinder 31, the effect of throwing the bran and powder out of the cylinder can be achieved during the rolling, thereby avoiding the problem of residue of bran and powder. At the same time, there is friction between the rolling rice grains, further reducing the problem of bran and powder sticking to the rice. At the same time, since a screw rod 35 is arranged inside the screening machine 2, when the screen cylinder 31 rotates, the screw rod 35 does not rotate. The rice located inside the screen cylinder 31 will be affected by the non-rotating screw rod 35 and continuously achieve automatic feeding. During the feeding process, it continues to tumble until it is discharged from the feeding base 41. By starting the driving motor 36, the output shaft of the driving motor 36 meshes with the screen cylinder 31 through the double-headed tooth shaft 37 to rotate. During the rotation of the screen cylinder 31, a plurality of cams 38 arranged in a circular array at its end will intermittently press the convex disc 310. The convex disc 310 makes a transverse movement after each pressing. The screw rod 35 in the non-working state is initially positioned in the connecting head 34 by the elastic force of the spring on the connecting plate 39. When the convex disc 310 is pressed by the cam 38, the whole convex disc 310 will drive the screw rod 35 to move towards the end of the feed hopper 7. When the pressing effect on the convex disc 310 is lost, the screw rod 35 moves back to its original position, that is, the screen cylinder 31 can drive the screw rod 35 to continuously move back and forth during the rolling. The screw rod 35 can come into contact with and rub the rice again during the movement, thereby solving the problem of bran and powder adhering to the rice. In order to avoid excessive wear of the rice by the screw rod 35, the outer edge of the screw rod 35 is designed to be made of a soft material (such as bristles, edible silica gel or edible rubber, etc.), further improving the efficiency of removing bran and powder while ensuring the quality of the rice. The rice after rolling friction feeding flows out inside the feeding base 41. Two symmetrically distributed pressure plates 42 block the flow of the rice. When the rice is fed, the pressure plates 42 use the elastic force of the torsion springs on them to achieve elastic blocking, so that the rice is in a small amount and evenly dispersed state during the feeding. The air blowing mechanism 5 continuously generates wind and discharges it from the air outlet 45, thereby achieving the effect of separating the rice and bran and powder again by the air flow, and then avoiding the problem of a small amount of bran and powder continuing to adhere to the rice, achieving the effect of fully removing the bran and powder. The wind drives the bran and powder to flow through the air outlet 45 into the collection base 61. The isolation net plate 47 at the air outlet 45 isolates some small rice grains, thereby preventing broken rice from seeping into the collection base 61 specifically for collecting bran and powder. The rice after being removed of bran and powder by the wind is finally discharged through the rice discharge port 46.

[0041] When the screen drum 31 is rolling, the scraper 33 on the screen drum 31 rotates synchronously. Since the bran powder will be thrown out of the screen drum 31 when it rotates, the bran powder will fall into the interior of the screening machine 2. The interior of the screening machine 2 is designed to have a large central diameter and small diameters at both ends, so that the bran powder thrown out is concentrated from both ends to the center and discharged into the collecting base 61 from the bran powder discharge port 8. The rotating scraper 33 can, on the one hand, achieve the effect of cleaning the inner wall of the screening machine 2, and on the other hand, achieve the effect of rotating fanning, and use wind force to further promote the discharge of bran powder. At the same time, during the rotation of the scraper 33, the convex ring 332 at the yield groove 331 on it will intermittently squeeze the passive pressure shaft rod 65. After the passive pressure shaft rod 65 is squeezed When the air pressure plate 64 moves downward and loses the extrusion, the spring on the air pressure plate 64 is used to move and reset. During the period when the passive pressure shaft rod 65 drives the air pressure plate 64 to move up and down, the air pressure plate 64 generates positive pressure and negative pressure in the collecting base 61. When the air pressure plate 64 generates positive pressure downward, the extruded air flow is discharged through the annular circulation base 62 or the bran powder discharge port 8. The air flow discharged through the annular circulation base 62 is discharged to the inside of the screening machine 2 through the one-way air outlet pipe 63. Since the one-way air outlet pipe 63 is set in multiple numbers and is located in the upper area of the circular inner wall of the annular circulation base 62, the wind force blows downward from the multiple one-way air outlet pipes 63 to the inside of the screening machine 2, and the wind force is discharged from top to bottom in the screening machine 2, further achieving the effect of wind-driven bran powder discharge. When the air pressure plate 64 moves upward to generate negative pressure, the suction pressure can only act on the screening machine 2 through the bran powder discharge port 8, thereby achieving the effect of using negative pressure to quickly absorb bran powder. At the same time, the air pressure plate 64 that continuously moves up and down can continuously squeeze the pressure block 481 through the pressure rod 641, and then achieve the effect of driving the anti-blocking mesh brush 48 on the pressure block 481 to continuously rotate. The rotating anti-blocking mesh brush 48 acts on the isolation mesh plate 47, further achieving the effect of rotating and cleaning the isolation mesh plate 47, avoiding excessive blockage of the isolation mesh plate 47, and then affecting the effect of the air outlet 45 in collecting bran powder.

[0042] The above implementation methods are only used to illustrate the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the spirit and scope of the embodiments of the present invention. Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present invention. The patent protection scope of the embodiments of the present invention should be defined by the claims.

Claims

1. A rice processing bran powder removal device, characterized in that: Including, A cabin base, inside which a screening machine is fixedly installed. Inside the screening machine, a rolling screening device is provided. The rolling screening device includes a mesh sieve cylinder and a connecting head. Both ends of the mesh sieve cylinder are rotatably installed inside the screening machine. A retention plate is fixedly connected to the inner wall of the mesh sieve cylinder. A scraper is fixedly connected to the surface of the mesh sieve cylinder. A screw rod is slidably connected inside the connecting head; A wind screening device, which is arranged at the discharging end of the screening machine; A blowing mechanism, which is arranged on the cabin base and is used to dock with the wind screening device to generate wind for the screening work of bran powder; An auxiliary screening and collecting device, which is arranged on the screening machine; The rolling screening device further includes a driving motor. The surface of the driving motor is installed on the screening machine. The output shaft of the driving motor is connected to a double-headed gear shaft. The surface of the double-headed gear shaft meshes with the surface of the mesh sieve cylinder, and the surface of the double-headed gear shaft is rotatably connected inside the screening machine; Both ends of the mesh sieve cylinder are fixedly connected with cams. A connecting plate is fixedly connected to the screw rod inside the connecting head. A spring is fixedly connected between the surface of the connecting plate and the inside of the connecting head. A convex disk is fixedly connected to one end of the screw rod close to the feed hopper; The surface of the convex disk is slidably connected inside the screening machine. A first magnetic ring is fixedly connected to one side of the convex disk away from the screw rod. One end of the first magnetic ring is magnetically connected to a second magnetic ring, and the end of the second magnetic ring is fixedly connected inside the screening machine; The wind screening device includes a discharging base. The surface of the discharging base is fixedly connected to the screening machine. A pressure plate is elastically connected inside the discharging base through a torsion spring. A protective cover cloth is fixedly connected between the surface of the pressure plate and the surface of the discharging base. An air inlet, an air outlet and a rice discharging port are respectively opened on the discharging base. An isolation net plate is fixedly connected to the air outlet. An anti-blocking net brush is rotatably connected to the isolation net plate; The auxiliary screening and collecting device includes a collecting base. The surface of the collecting base is fixedly connected to the screening machine. An annular circulation base is fixedly connected to the collecting base. A one-way air outlet pipe is fixedly connected to the annular circulation base. An air pressure plate is piston-connected inside the collecting base. A passive pressing shaft rod is fixedly connected to the surface of the air pressure plate; The inner wall of the annular circulation base is fixedly connected to the surface of the screening machine. The end of the one-way air outlet pipe penetrates through the inside of the screening machine. A spring is fixedly connected between the surface of the air pressure plate and the inner wall of the collecting base. The inner wall of the air pressure plate is slidably connected to the bottom end of the annular circulation base; A relief groove is provided on the surface of the scraper at the position of the passive pressing shaft rod. A convex ring is arranged on the relief groove, and the convex ring is used to squeeze the passive pressing shaft rod.

2. The bran-removing and powder-making equipment for rice processing according to claim 1, characterized in that: One end of the screening machine away from the wind screening device is fixedly connected to a feed hopper. A bran powder discharging port is arranged on the screening machine. The end of the connecting head is fixedly connected inside the screening machine. A discharging slope is arranged at one end of the inside of the screening machine close to the feed hopper.

3. The bran-removing and powdering equipment for rice processing according to claim 1, wherein: A pressing block is fixedly connected to one end of the anti-blocking net brush close to the air pressure plate. A pressing rod is fixedly connected to the bottom of the air pressure plate, and the pressing rod is used to squeeze the pressing block.

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