CN213493861U - Milling equipment - Google Patents

Abstract

The utility model provides a milling device, which is used for milling grains and comprises a frame; the main roller is vertically arranged on the rack in a rotatable manner; the tensioning roller is vertically arranged in the rack in a rotatable manner; the abrasive belt is arranged on the outer sides of the main roller and the tensioning roller; the rice chambers are arranged on the periphery of the main roller and positioned on one side, away from the main roller, of the abrasive belt, and are matched with the abrasive belt to grind grains; the dust blocking device is used for blocking bran coats generated after grinding, the rack is provided with a horizontally arranged mounting platform, the bottom of each rice chamber is fixedly connected with the mounting platform, a gap is formed between every two adjacent rice chambers, the dust blocking device is provided with a bran blocking ring and a driving mechanism, the bran blocking ring surrounds the main roller and is located on one side, away from the abrasive belt, of each rice chamber, and the driving mechanism is used for driving the bran blocking ring to move in the vertical direction.

Description

Milling equipment

Technical Field

The utility model belongs to the cereal field of milling, concretely relates to equipment of milling.

Background

A milling apparatus is an apparatus for milling large particulate matter into small particulate matter. For example, a rice mill is a common milling device, which is used to peel brown rice to form polished rice.

The main structure of the rice mill for milling rice is a main roller, a tensioning roller, an abrasive belt sleeved outside the main roller and the tensioning roller, and rice chambers surrounding the periphery of the main roller and close to the abrasive belt, wherein a gap is arranged between each rice chamber. During the milling process, the brown rice enters the rice chamber through the feeding hole to be milled, the abrasive belt mills the brown rice to form polished rice and bran, the polished rice is collected through the discharging hole at the bottom of the rice chamber, the bran is similar to dust in state, can fly out of the rice chamber along with the movement of the abrasive belt after being milled, and flies out of the surface of the abrasive belt in a scattered manner, and needs to be collected through the bran outlet at the bottom of the main roller.

In the prior art, a bran blocking mechanism is arranged outside each rice chamber and at least comprises a strip-shaped bran blocking ring and a sealing strip arranged on the long edge of one side of the bran blocking ring, and is used for blocking bran from flying out. The bran blocking ring is fastened on the rice chamber through a bolt and is integrated with the rice chamber, and the sealing strip on the bran blocking ring is matched with the long edge of one side, which is not provided with the sealing strip, of the adjacent bran blocking ring to form sealing. This kind of keep off bran mechanism, when needs observe, overhaul and dismantle the rice room, pull down earlier and keep off the bran circle, the more of the quantity of rice room, the time that the dismantlement needs spent just more, extravagant time of overhauing very much. And, dismantle the in-process many times, the sealing strip on the bran blocking ring inevitably can receive the influence, leads to sealing performance to receive the influence, just can lead to the chaff to spill after a period, consequently, only can guarantee the sealed effect of bran blocking mechanism to need regularly change the sealing strip.

SUMMERY OF THE UTILITY MODEL

For solving above-mentioned problem, provide a equipment of milling, can reduce the dismouting time when needs overhaul the rice room and dismouting, submit maintenance efficiency, the utility model discloses a following technical scheme:

the utility model provides a milling equipment for mill cereal, a serial communication port, include: a frame; the main roller is vertically arranged on the rack in a rotatable manner; the tensioning roller is vertically arranged in the rack in a rotatable manner; the abrasive belt is arranged on the outer sides of the main roller and the tensioning roller; the rice chambers are arranged on the periphery of the main roller and positioned on one side, away from the main roller, of the abrasive belt, and are matched with the abrasive belt to grind grains; the dust blocking device is used for blocking bran coats generated after grinding, the rack is provided with a horizontally arranged mounting platform, the bottom of each rice chamber is fixedly connected with the mounting platform, a gap is formed between every two adjacent rice chambers, the dust blocking device is provided with a bran blocking ring and a driving mechanism, the bran blocking ring surrounds the main roller and is located on one side, away from the abrasive belt, of each rice chamber, and the driving mechanism is used for driving the bran blocking ring to move in the vertical direction.

The utility model provides a milling device, can also have the characteristics that, wherein, the driving mechanism is provided with a guide rail, a slide block, a guide angle iron, a guide rod, a balancing weight, a chain pulley, a guide pulley, a dragging chain and a driving motor, the guide rail is fixedly connected on the frame and extends along the vertical direction, the slide block is movably sleeved on the guide rail, the guide angle iron is fixedly connected on the slide block, one side of the guide rail away from the frame is surrounded on the guide rail and is fixedly connected with a bran blocking ring, the guide rod is fixedly connected on the frame and is parallel with the guide rail, the balancing weight is movably sleeved on the guide rod, the chain pulley and the guide pulley are rotatably arranged on the frame, the chain pulley is positioned at the top of the guide rod, the guide pulley is arranged at the top of the guide rail, the dragging chain is wound on the chain pulley and the, driving motor is connected with the chain pulley for drive chain pulley rotates, thereby makes the slider remove along the length direction of guide rail while the balancing weight removes along the length direction of guide bar, further makes the direction angle bar that is connected with the slider and keeps off the chaff circle and remove along vertical direction.

The utility model provides a milling equipment can also have such characteristic, and wherein, fender bran circle bottom is equipped with the sealing strip, thereby the top of mounting platform extrudees the formation to the sealing strip with the bottom that keeps off the bran circle and seals, and the length of direction angle bar is greater than the length of guide rail, and when keeping off the bran circle and leaning on mounting platform, keep off the bran circle and can be provided with one side of rice room at mounting platform and remove to the direction of keeping away from mounting platform to show rice room.

The utility model provides a milling equipment can also have such characteristic, wherein, is equipped with on the mounting platform and keeps off the corresponding arc hole of chaff circle for let the chaff circle pass through, the downthehole sealing strip that is equipped with of arc, the length of direction angle bar is less than the length of guide rail, when keeping off the chaff circle and leaning on the mounting platform, keeps off the chaff circle and can pass the arc hole and remove to the direction that the rice room was kept away from to mounting platform, thereby exposes the rice room.

The utility model provides a milling equipment can also have such characteristic, and wherein, direction angle bar has U type slot portion, and the bottom of this U type slot portion is the opening, and the top is the shrouding, and U type slot portion passes through bolt and slider fixed connection, and the guide rail setting is in the U-shaped slot portion.

The utility model provides a milling equipment can also have such characteristic, wherein, the both ends of slider be equipped with the guide rail support, the guide rail passes through guide rail support and frame fixed connection, the both ends of guide bar are equipped with the guide bar support, the guide bar passes through guide bar support and frame fixed connection.

The utility model provides a milling equipment can also have such characteristic, and wherein, fender bran circle has arc portion and follows two extensions that extend with the tangent direction of this arc portion from the both ends of arc portion, and the transversal semicircular in shape of arc portion, extension and direction angle iron fixed connection.

The utility model provides a milling equipment can also have such characteristic, and wherein, the frame still has hollow stand, and mounting platform is connected and this connection plane of perpendicular to with the stand, and guide bar, balancing weight, chain pulley, driving motor set up in the stand, and guide rail, slider, direction angle bar, guide pulley setting are outside the stand.

The utility model provides a milling equipment can also have such characteristic, and wherein, actuating mechanism's quantity is 2, sets up respectively in the both sides that keep off the chaff circle, and the quantity of slider is 2 among every actuating mechanism.

The utility model provides a milling equipment can also have such characteristic, wherein, keeps off the chaff circle and is equipped with the rib that extends along the horizontal direction on keeping away from a side surface of rice room.

Utility model with the functions and effects

According to the utility model discloses an equipment of milling sets up around rice room and keeps off the chaff circle, should keep off the chaff circle and cover all rice rooms to can reciprocate under actuating mechanism's drive, thereby shelter from or expose the rice room, set up respectively in every rice outdoor with prior art and keep off the chaff mechanism and compare, overhaul the rice room when dismantling, keep off the chaff circle through whole lifting and can expose the rice room, make things convenient for the dismantlement of rice room, and need not to dismantle every outdoor fender chaff mechanism of rice, the time of dismantling and installing has been saved.

Drawings

Fig. 1 is a schematic perspective view of a milling device according to a first embodiment of the present invention;

fig. 2 is a schematic top view of a milling apparatus according to a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a main roller, a tension roller and a sanding belt according to a first embodiment of the present invention;

FIG. 4 is a schematic perspective view of a rice room according to an embodiment of the present invention;

figure 5 is a cross-sectional view from above of a milling apparatus according to a first embodiment of the invention;

FIG. 6 is a left side view of a milling apparatus (without a feeding device) according to a first embodiment of the present invention;

FIG. 7 is an enlarged view of a portion A of FIG. 6;

FIG. 8 is an enlarged view of a portion B of FIG. 6;

FIG. 9 is an enlarged view of a portion of the structure of FIG. 6 at C;

fig. 10 is a schematic perspective view of a milling device after a bran blocking ring rises according to an embodiment of the present invention;

fig. 11 is a schematic perspective view of a milling device after the bran-blocking ring descends in an embodiment of the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings and examples.

< example one >

Fig. 1 is a schematic perspective view of a milling device according to a first embodiment of the present invention. Fig. 2 is a schematic top view of a milling apparatus according to a first embodiment of the present invention. Fig. 3 is a schematic structural diagram of a main roller, a tension roller and a sanding belt according to a first embodiment of the present invention.

As shown in fig. 1 to 3, the present embodiment provides a milling apparatus 100 for milling grains, comprising a frame 10, a main roller 20, a tension roller 30, a rice chamber 40, a feeding device 50, a sanding belt 60, a discharging device (not shown) and a dust blocking device 70. In this embodiment, the milled cereal is brown rice, and the milling apparatus is used to mill the brown rice to form polished rice, and the milling of the brown rice will be described in detail.

The frame 10 has a base 11, a cabinet 12, 2 uprights 13, and a discharge device mounting table 14.

The base 11 is placed subaerial, is the rectangle, and its ground four corners is equipped with 4 pillars that are used for supporting the base for other parts of installation base 11.

The cabinet 12 is a box structure, and is disposed at one side of the top surface of the base 11, and is used for installing a controller for controlling the milling apparatus 100, a power supply, a fan, a tension roller, and the like.

The 2 upright posts 13 are all of a hollow structure, are arranged in the case 12 and are respectively positioned on two sides of the case 12.

The discharging device mounting table 14 is arranged on the top of the base 11 and is fixedly connected with the case 12. The cross section of the discharging device mounting table 14 is arc-shaped, and the radian of the discharging device mounting table is larger than 180 degrees. The top of the discharging device mounting table 14 is a mounting platform 141 parallel to the horizontal plane, and the mounting platform is connected with the upright column 13 and is perpendicular to the connecting plane.

The main drum 20 includes a main cylinder 21 and a main drum shaft 22.

The main cylinder 21 is cylindrical, extends in the vertical direction, has an end surface parallel to the horizontal plane, and is disposed on the top of the discharging device mounting table 14. The main drum shaft 22 is inserted through the axis of the main drum 21, connected to a motor for driving the main drum 21 to rotate, and driven by the motor to drive the main drum 21 to rotate.

The tension drum 30 includes a tension cylinder 31 and a housing 32.

The tension cylinder 31 has a cylindrical shape, a diameter smaller than that of the main cylinder 21, and an end surface parallel to the end surface of the main cylinder 21 of the main drum 20. The housing 32 is rotatably connected to the tensioning cylinder 31, i.e. the housing 32 does not follow the rotation when the tensioning cylinder 31 is rotated. The cover 32 forms a half-enclosed structure with respect to the tension cylinder 31, specifically, the cover 32 covers a part of the side surface of the tension cylinder 31, but the inner side surface of the cover 32 close to the tension cylinder 31 does not come into contact with the tension cylinder 31 when the tension cylinder 31 rotates. The specific area of the cover 32 covering the tension cylinder 31 can be set according to specific requirements, and it is preferable that the contact area between the abrasive belt 60 and the tension cylinder 31 is not reduced. In the present embodiment, the cover 32 covers 50% of the side surface of the tension cylinder 31 near the main drum 20.

The 2 columns are axisymmetrical with respect to a line connecting the center of the main cylinder 21 and the center of the tension cylinder 31.

The sanding belt 60 is sleeved outside the main cylinder 21 of the main roller 20 and the tension cylinder 31 of the tension roller 30 to form a complete sanding roller structure. The area where sanding belt 60 surrounds cylinder 21 and tensioning roller 30 is formed inside sanding belt 60 and vice versa outside sanding belt 60. The sanding belt 60 is a rough surface for contact with the brown rice for grinding.

A plurality of rice chambers 40 which are evenly distributed along the circumferential direction and are close to the abrasive belt 60 are arranged on the outer side of the abrasive belt 60 on the circumferential surface of the main cylinder body 11. A gap is arranged between two adjacent rice chambers 40. In this embodiment, 12 meter chambers 40 are uniformly distributed outside the abrasive belt 60.

Fig. 4 is a schematic perspective view of a rice room according to an embodiment of the present invention.

As shown in fig. 4, the rice chamber 40 has a rice milling chamber 41, a feed port 42, and a discharge port 43.

The rice milling chamber 41 has three plates connected in sequence, and the cross section of the structure formed by the three plates is trapezoidal, and the bottom of the trapezoid is an opening facing the abrasive belt 60. The feed port 42 is arranged at the top of the rice milling chamber 41 and communicated with the rice milling chamber 41, and the discharge port 43 is arranged at the bottom of the rice milling chamber 41 and communicated with the rice milling chamber 41.

The top of the main cylinder 11 is provided with a feeding device 50, and the feeding device 50 is provided with 12 feeding paths corresponding to the feeding port 42 of the 12-meter chamber 40.

The top of the main cylinder 11 is provided with a discharging device which is provided with 12 discharging passages corresponding to the discharging holes 43 of the 12-meter chamber 40 and a bran discharging passage arranged between two adjacent discharging passages.

The brown rice enters the rice milling cavity 42 from the feeding hole 42 after passing through the feeding passage from the feeding device 50 and is milled in the rice milling cavity 42, the brown rice moves from top to bottom in the rice milling cavity 42 and is driven to rotate by the abrasive belt 60, so that each surface of the brown rice is ground into polished rice by the abrasive belt 60 and falls into the discharging passage communicated with the rice outlet, and milled bran falls into the bran discharging passage to be collected. During the grinding process, since the abrasive belt 60 rotates at a high speed, the ground bran may float around in addition to falling into the bran discharge passage.

Figure 5 is a cross-sectional view from above of a milling apparatus according to a first embodiment of the invention.

Fig. 6 is a left-side view of a milling apparatus (without a feeding device) according to a first embodiment of the present invention.

As shown in fig. 5 and 6, the dust guard 70 is used for blocking the scattering of bran, and has a bran blocking ring 71 and a driving mechanism 72. In this embodiment, the dust guard 70 has 2 driving mechanisms 72.

The bran blocking ring 71 is arranged on the mounting platform and covers all the rice chambers 40. In the initial state, when the bran blocking ring 71 is not lifted, the top of the bran blocking ring 71 is higher than the highest point of the rice chamber 40.

The bran ring 71 has an arc portion 711 and two extending portions 712 extending from both ends of the arc portion 711 in a direction tangential to the arc portion 711. The cross section of the circular arc 711 is semicircular, and the radian is 180 degrees. The two extensions 712 are parallel to each other and perpendicular to the connection surface of the upright 13 to the mounting platform 141, and also perpendicular to the mounting platform 141.

Fig. 7 is a partially enlarged schematic view of a portion a in fig. 6.

The bottom of the bran blocking ring 71 is provided with a sealing strip 713. In the initial state, the bran blocking ring 71 is not lifted, the bottom of the bran blocking ring abuts against the mounting platform 141, the sealing strip 713 forms a seal under the extrusion of the bran blocking ring 71 and the mounting platform 141, and bran is prevented from leaking from the bottom of the bran blocking ring 71.

The side of the bran blocking ring 71 away from the rice chamber 40 is the outer side surface of the bran blocking ring 71, and ribs 714 extending along the horizontal direction are arranged on the outer side surface. In this embodiment, the upper portion and the lower portion of the outer side surface of the bran blocking ring 71 are respectively provided with 2 ribs 714.

Fig. 8 is a partially enlarged structural view at B in fig. 6. Fig. 9 is a partially enlarged structural view at C in fig. 6.

As shown in fig. 6, 8, and 9, each driving mechanism 72 has a guide rail 721, a guide rail mount 722, a slider 723, a guide angle 724, a guide rod 725, a guide rod mount 726, a weight 727, a chain pulley 728, a guide pulley 729, a hoisting chain 730, and a driving motor 731.

The guide rail 721 extends in the vertical direction and is fixedly mounted on the outer side surface of the upright 13, i.e., the surface of the upright 13 connected to the mounting platform 141, by a guide rail mount 722. Guide rail mounts 722 are provided at both ends of the guide rail 721 for fixing the guide rail 721. In this embodiment, the rail mount 722 is an L-shaped angle iron.

The slider 723 is fitted over the guide rail 721 and can slide along the guide rail 721. In this embodiment, the number of sliders 723 per guide rail 721 is 2.

The guide angle 724 is fixedly connected to a slide 723 and has a U-shaped groove 7241 covering the guide 721 on the side remote from the upright 13. The bottom of the U-shaped groove 7241 is open to allow the guide rail 721 to pass through when the guide angle 724 drives the slider 723 to slide along the guide rail 721. The top of the U-shaped groove 7241 is a sealing plate 7242, which sealing plate 7242 seals the top of the U-shaped groove 7241. The extension part 712 of the bran blocking ring 71 is fixedly connected to the guide angle iron 724 and moves along with the guide angle iron 724.

A connecting portion 7243 for connecting the traction chain 730 is provided at a position close to the slider 723 inside the U-shaped groove 7241.

The guide rod 725 extends in the vertical direction, that is, the guide rod 725 is parallel to the guide rail 721. The guide rods 725 are fixedly mounted by guide rod mounts 726 to the inside face of the mast 13, which is the two faces of the same plate as the outside face of the mast on which the guide rails 721 are mounted. Guide rod holders 726 are provided at both ends of the guide rod 725 for fixing the guide rod 725. In this embodiment, the guide bar support 726 is an L-shaped angle iron.

The weight 727 is sleeved on the guide rod 725 and can move along the guide rod 725.

A chain pulley 728 is rotatably provided at the top of the guide rod 725 and is attached to the inner surface of the upright 13 for cooperation with the traction chain 730.

A guide pulley 729 is rotatably provided on the top of the guide rail 721, attached to the outer surface of the column 13, for being engaged with the traction chain 730.

The traction chain 730 is wound on the chain pulley 728 and the guide pulley 729, one end of the traction chain is fixedly connected with the connecting part 7243 on the guide angle iron 724, and the other end of the traction chain is fixedly connected with the balancing weight 727 and used for drawing the guide angle iron 724 to move along the vertical direction.

The driving motor 731 is disposed in the upright column 13, connected to the chain pulley 728, and configured to drive the connecting pulley 728 to rotate. A switch for controlling the start and stop of the driving motor is arranged between the driving motor 731 and the power supply.

Fig. 10 is a schematic perspective view of a milling device after the bran-blocking ring rises according to an embodiment of the present invention.

The lifted state of the bran blocking ring is shown in fig. 10.

When the rice chamber 40 needs to be overhauled and disassembled, the specific action process of controlling the bran blocking ring 71 to lift and expose the rice chamber 40 by the switch is as follows:

when the switch is pressed down, the driving motor 731 is started, the chain pulley 728 rotates counterclockwise as shown in fig. 8 under the driving of the driving motor 731, so that the chain wound on the traction chain pulley 728 moves, and further drives the guide angle iron 724 connected to the traction chain 728 to move upwards along the extending direction (i.e. the vertical direction) of the guide rail 721 through the slider 723, so that the bran blocking ring 71 fixed on the guide angle iron 724 moves upwards, and meanwhile, the clump weight 727 moves downwards along the extending direction (i.e. the vertical direction) of the guide rod 725, so that the bran blocking ring 71 is lifted.

After the bran blocking ring is lifted to a required position, the switch is turned off, the driving motor 731 immediately stops rotating, and the bran blocking ring 71 stops lifting.

Examples effects and effects

The equipment of milling that this embodiment provided sets up around the rice room and keeps off the chaff circle, this keep off the chaff circle and cover all rice rooms, and can reciprocate under actuating mechanism's drive, thereby shelter from or expose the rice room, set up respectively with every rice outdoor fender chaff mechanism among the prior art and compare, when needs overhaul the dismantlement to the rice room, keep off the chaff circle through whole lifting and can expose the rice room, make things convenient for the dismantlement of rice room, and need not to dismantle every outdoor fender chaff mechanism of rice, the time of dismantling and installing has been saved, the maintenance efficiency is improved.

In addition, because the rice room is exposed after the bran blocking ring is lifted, a worker can firstly visually observe the condition of the rice room without detaching the rice room, and the overhaul time is greatly saved.

The milling equipment that this embodiment provided, keep off the chaff circle and be integrated into one piece's panel, among the prior art the rice outdoor be equipped with respectively when keeping off the chaff mechanism, every keeps off and need set up the sealing member between the chaff mechanism, keep off the chaff mechanism also need be dismantled at the in-process of dismouting rice room, the sealing member is in the inevitable meeting decline of dismouting in-process sealing performance many times, and integrated into one piece's fender chaff circle is through being equipped with the sealing strip in the bottom, can realize sealing, prevent the chaff departure, and dismantle the in-process at rice room, need not dismantle and keep off the chaff circle, consequently, it can guarantee to keep off the chaff circle homoenergetic and.

The equipment of milling that this embodiment provided, direction angle bar cover the slide rail, because the slide rail setting is outside the stand, is invaded by the dust easily, can prevent after setting up the direction angle bar that dust, chaff etc. from getting into the slide rail after influence the ride comfort when the slider slides on the slide rail.

The equipment of milling that this embodiment provided, guide bar, balancing weight, chain pulley and driving motor all set up in the stand, can effectively avoid dust and chaff to get into wherein, cause the influence to the smooth operation of these parts.

The equipment of milling that this embodiment provided is equipped with the rib that extends along the horizontal direction at the surface that keeps off the chaff circle, because keep off the chaff circle the volume great, can improve platelike structure's stability through setting up the rib, prevents to keep off the chaff circle and warp.

< example two >

In this embodiment, the same components as those in the first or second embodiment are given the same reference numerals and the same description thereof is omitted.

In the present embodiment, another milling apparatus 200 is provided, in which the mounting platform 141 is provided with an arc-shaped hole corresponding to the bran blocking ring 71 for allowing the bran blocking ring 171 to pass through. And a sealing strip is arranged in the arc-shaped hole and is matched with the outer side surface of the bran blocking ring to form sealing.

In the initial state, the bran blocking ring 71 covers all the rice chambers 40, and the bottom end of the bran blocking ring is abutted to the sealing strips in the arc-shaped holes.

Fig. 11 is a schematic perspective view of a milling device after the bran-blocking ring descends in an embodiment of the present invention.

When the rice chamber needs to be exposed, the bran blocking ring 71 moves downwards through the arc-shaped hole under the driving of the driving mechanism 72, as shown in fig. 11.

The top of the guide angle 732 is no longer provided with a sealing plate, but is open.

Compared with the rice exposing chamber 40 which is exposed by upward movement of the bran blocking ring 71 in the first embodiment, the rice exposing chamber 40 which is exposed by downward movement of the bran blocking ring 71 in the first embodiment, the bran blocking ring 71 penetrates through the arc-shaped hole to enter the discharging device mounting table inner part 14 in the downward movement process, and the space is saved.

The above embodiments are merely illustrative of specific embodiments of the present invention, and the present invention is not limited to the description of the above embodiments.

Claims (10)

1. A milling apparatus for milling grain, comprising:

a frame;

the main roller is vertically arranged on the rack in a rotatable manner;

the tensioning roller is vertically arranged in the rack in a rotatable mode;

the abrasive belt is arranged on the outer sides of the main roller and the tensioning roller;

the rice chambers are arranged on the periphery of the main roller and positioned on one side, away from the main roller, of the abrasive belt, and are matched with the abrasive belt to grind the grains;

a dust blocking device for blocking bran produced after milling,

wherein the frame is provided with a horizontally arranged mounting platform, the bottom of the rice chamber is fixedly connected with the mounting platform,

a gap is arranged between two adjacent rice chambers,

the dust blocking device is provided with a bran blocking ring and a driving mechanism,

the bran blocking ring is arranged around the main roller and is positioned on one side of the rice chamber far away from the abrasive belt,

the driving mechanism is used for driving the bran blocking ring to move along the vertical direction.

2. The milling apparatus of claim 1, wherein:

wherein the driving mechanism is provided with a guide rail, a slide block, a guide angle iron, a guide rod, a balancing weight, a chain pulley, a guide pulley, a traction chain and a driving motor,

the guide rail is fixedly connected on the frame and extends along the vertical direction,

the sliding block is movably sleeved on the guide rail,

the guide angle iron is fixedly connected to the sliding block, surrounds the guide rail from one side of the guide rail, which is far away from the rack, and is fixedly connected with the bran blocking ring,

the guide rod is fixedly connected on the frame and is parallel to the guide rail,

the balancing weight is movably sleeved on the guide rod,

the chain pulley and the guide pulley are rotatably arranged on the frame, the chain pulley is positioned at the top of the guide rod, the guide pulley is arranged at the top of the guide rail,

the traction chain is wound on the chain pulley and the guide pulley, one end of the traction chain is connected to the guide angle iron, the other end of the traction chain is connected to the balancing weight,

the driving motor is connected with the chain pulley and used for driving the chain pulley to rotate, so that the sliding block moves along the length direction of the guide rail, meanwhile, the balancing weight moves along the length direction of the guide rail, and the guide angle iron and the bran blocking ring which are connected with the sliding block move along the vertical direction.

3. A milling apparatus as claimed in claim 2, wherein:

wherein the bottom of the bran blocking ring is provided with a sealing strip,

the top of the mounting platform and the bottom of the bran blocking ring extrude the sealing strip to form sealing,

the length of the guide angle iron is greater than that of the guide rail,

when the bran blocking ring abuts against the mounting platform, the bran blocking ring can be arranged on the mounting platform, one side of the rice chamber is far away from the mounting platform, and the rice chamber is moved in the direction, so that the rice chamber is exposed.

4. A milling apparatus as claimed in claim 2, wherein:

wherein, the mounting platform is provided with an arc-shaped hole corresponding to the bran blocking ring for the bran blocking ring to pass through,

a sealing strip is arranged in the arc-shaped hole,

the length of the guide angle iron is less than that of the guide rail,

when the bran blocking ring abuts against the mounting platform, the bran blocking ring can penetrate through the arc-shaped hole to move towards the direction, far away from the rice chamber, of the mounting platform, so that the rice chamber is exposed.

5. A milling apparatus as claimed in claim 2, wherein:

wherein the guide angle iron is provided with a U-shaped groove part, the bottom of the U-shaped groove part is provided with an opening, the top of the U-shaped groove part is provided with a sealing plate,

the U-shaped groove part is fixedly connected with the sliding block through a bolt,

the guide rail is arranged in the U-shaped groove part.

6. A milling apparatus as claimed in claim 2, wherein:

wherein, two ends of the sliding block are provided with guide rail supports, the guide rail is fixedly connected with the frame through the guide rail supports,

the two ends of the guide rod are provided with guide rod supports, and the guide rod is fixedly connected with the rack through the guide rod supports.

7. A milling apparatus as claimed in claim 2, wherein:

wherein the bran blocking ring is provided with an arc part and two extending parts which extend from two ends of the arc part along the direction tangent to the arc part,

the cross section of the circular arc part is semicircular,

the extension part is fixedly connected with the guide angle iron.

8. A milling apparatus as claimed in claim 2, wherein:

wherein the frame is also provided with a hollow upright post,

the mounting platform is connected with the upright column and is perpendicular to the connecting plane,

the guide rod, the balancing weight, the chain pulley and the driving motor are arranged in the upright post,

the guide rail, the sliding block, the guide angle iron and the guide pulley are arranged outside the upright post.

9. A milling apparatus as claimed in claim 2, wherein:

wherein the number of the driving mechanisms is 2, the driving mechanisms are respectively arranged at two sides of the bran blocking ring,

the number of the sliding blocks in each driving mechanism is 2.

10. The milling apparatus of claim 1, wherein:

and ribs extending along the horizontal direction are arranged on the surface of one side of the bran blocking ring, which is far away from the rice chamber.

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