CN107096593B

CN107096593B - Rice production line and process thereof

Info

Publication number: CN107096593B
Application number: CN201710156905.1A
Authority: CN
Inventors: 高建忠; 王洪营; 何斌斌; 杨晶晶
Original assignee: Tianjin Chaobai Cereal Food Co ltd
Current assignee: Tianjin Chaobai Cereal Food Co ltd
Priority date: 2017-03-16
Filing date: 2017-03-16
Publication date: 2023-05-19
Anticipated expiration: 2037-03-16
Also published as: CN107096593A

Abstract

The invention provides a rice production line, which comprises a finish machining area, wherein a vibration cleaning screen, two sand roller rice mills, two polishing machines and two rice classifying screens are sequentially arranged in the finish machining area; two color selectors are arranged between the two rice classifying screens; a raw material storage area comprising a labeled one meter bin; the finished product packaging area comprises a broken rice bin and a finished product rice bin, a belt conveyor is arranged below the broken rice bin and the finished product rice bin, and the discharging end of the belt conveyor is connected with a feeding hole of the packaging machine through a lifting machine. The rice production line and the process thereof effectively improve the product conveying efficiency and the conveying quality among the devices. The stone mill is added into a rice production line, and an operator can freely adjust the rotating speed of the equipment, so that the invention can be suitable for producing various rice such as stone mill rice, germ-retaining rice, polished rice and the like. The invention can basically meet the production of all products of manufacturers, and effectively reduce the investment of equipment in the early stage and the maintenance cost of the equipment in the later stage.

Description

Rice production line and process thereof

Technical Field

The invention belongs to the field of automatic grain processing, and particularly relates to a rice production line.

Background

The rice is one of main grains in China, and the annual output and demand can reach hundreds of millions of tons. During the process of processing raw rice into saleable rice, a series of equipment such as rice mills, polishing machines, color sorters, etc. are used. The existing processing factories place the equipment in the same factory, but the equipment is not provided with corresponding automatic conveying devices, and the equipment is still manually conveyed; this makes rice production inefficiency, and the easy pollution of product in the transport way, has reduced product quality.

In recent years, with the continuous attention of people on health maintenance, the refined rice can not meet the consumption demands of people due to the large nutrition loss in the processing process; the stone milled rice and the embryo-retaining rice with higher nutritive value have better market prospect. However, the stone milled rice and the embryo rice are long in processing time, the processing technology is complex, and the automation degree of processing equipment is low, so that the cost of the stone milled rice and the embryo rice is always high, and the sales of the stone milled rice and the embryo rice are greatly hindered.

Disclosure of Invention

In view of the above, the invention aims to provide a rice production line to solve the problems of low automation degree, low production efficiency and unfinished product quality of rice production equipment in the prior art.

In order to achieve the above purpose, the technical scheme of the invention is realized as follows:

a rice production line comprises a finish machining area, wherein a vibration cleaning screen, two sand roller rice mills, two polishing machines and two rice classifying screens are sequentially arranged in the finish machining area; two color selectors are arranged between the two rice classifying screens; the motors of the sand roller rice mill and the polishing machine are respectively and electrically connected with a frequency converter; the discharge port of the former equipment is connected with the feed port of the adjacent latter equipment through a lifting machine; the dust removing area is provided with a dust removing device which is respectively connected with the vibration cleaning sieve, the sand roller rice mill, the polishing machine, the rice classifying screen and the color selector through closed pipelines; the raw material storage area is positioned at one side of the finish machining area, which is close to the vibration cleaning screen, and comprises a standard one-meter bin, a first grain pit is arranged at one side of the standard one-meter bin, which is away from the finish machining area, and a lifting machine communicated with the standard one-meter bin is arranged in the first grain pit; a belt conveyor is arranged below the discharge port of the standard one-meter bin, and the discharge end of the belt conveyor is connected with the feed port of the vibration cleaning sieve through a lifting machine; the finished product packaging area is positioned at one side of the finish machining area, which is close to the polished rice classifying screen, and comprises a broken rice bin and a finished product rice bin, wherein a belt conveyor is arranged below the broken rice bin and the finished product rice bin, and the discharging end of the belt conveyor is connected with a feeding hole of the packaging machine through a lifting machine.

Further, the device also comprises a stone milling area, wherein a plurality of stone milling is arranged on the stone milling area, a belt conveyor is arranged below a stone milling discharge hole, and the discharge end of the belt conveyor is positioned right above the belt conveyor below the standard one-meter bin; the raw material storage area further comprises a rice hull bin and a brown rice bin, a second grain discharging pit is arranged on one side, away from the stone milling area, of the rice hull bin and the brown rice bin, and a lifting machine which is respectively communicated with the rice hull bin and the brown rice bin is arranged in the second grain discharging pit; a belt conveyor is arranged below the rice hull bin and the brown rice bin, the discharging end of the belt conveyor is communicated with a screw conveyor through a lifting machine, and a plurality of buffer bins are arranged at the lower end of the screw conveyor along the extending direction of the screw conveyor; and a buffer bin is correspondingly arranged right above each stone mill.

Further, the stone milling area and the finish machining area are respectively provided with an upper layer and a lower layer; the vibration cleaning screen, the sand roller rice mill, the polishing machine, the rice classifying screen and the color selector are all arranged on the upper layer of the finish machining area, and the stone mill is arranged on the upper layer of the stone milling area; all the belt conveyors are arranged on the lower layers of the stone grinding area and the finish machining area.

Further, magnetic separators are respectively arranged between the feeding port of the sand roller rice mill and the lifting machine, between the feeding port of the polishing machine and the lifting machine, and between the feeding port of the packing machine and the lifting machine.

Further, the magnetic separator comprises a hollow cylinder, and a feeding pipe extending into the magnetic separator is fixed at the central position of the upper end of the cylinder; the end part of the feeding pipe in the cylinder body is closed, an upward arc-shaped protrusion is arranged on the inner side of the end part, and a plurality of inclined downward material distributing pipes are arranged on the side wall of the feeding pipe in the cylinder body; a plurality of magnetic separation devices are uniformly distributed on the side wall of the cylinder body around the axis of the cylinder body, each magnetic separation device comprises a chain plate conveyor rotating anticlockwise, and chain plates are magnetic media; one side of the chain plate conveyor is positioned in the barrel, the other side of the chain plate conveyor is positioned outside the barrel, and the lower part of the chain plate conveyor is inclined into the barrel; a magnetic field generator and a demagnetizing device are fixed at the outer part of the cylinder body close to the chain plate conveyor, and the demagnetizing device is positioned above the magnetic field generator; a dust collector is arranged between the magnetic field generator and the demagnetizing equipment, and a plurality of brushes propping against the chain plates are arranged on the air suction port of the dust collector; the magnetic separation device also comprises a protective shell fixed on the outer side of the cylinder; the bottom of the inner side of the cylinder body is inclined downwards and is fixed with a discharging pipe.

Further, the dust removing devices are in three groups, and each group of dust removing device comprises a pulse dust remover communicated with an air inlet of a fan through a closed pipeline and at least one centrifugal dust remover communicated with an air outlet of the fan through a pipeline; the pulse dust collector and the centrifugal dust collector are respectively provided with an air-related device.

Further, the stone mill includes a drive spindle that extends through Dan Nianpan; the upper part of the driving main shaft is sleeved with a fixed seat, the lower part of the driving main shaft is connected with a motor through a speed reducer, and the motor is electrically connected with a frequency converter; the fixed seat is provided with two groups of rotary connecting pieces, each group of rotary connecting pieces is rotationally connected with one stone roller, and the two stone rollers are symmetrically arranged along the axis of the driving main shaft; a sliding rail is arranged on the outer side wall of the driving main shaft along the axial direction of the driving main shaft, and the upper end and the lower end of the sliding rail respectively extend out of the fixing seat and are in sliding fit with a sliding groove on the fixing seat; the upper end and the lower end of the fixed seat are respectively provided with a fixed edge, each fixed edge is connected with a bolt in a threaded manner, and the tail end of each bolt abuts against the outer side wall of the driving main shaft; each group of rotary connecting pieces comprises a transverse shaft which is rotationally connected with the fixed seat; the transverse shaft is horizontally arranged, and two ends of the transverse shaft extend out of the fixing seat; one end of the transverse shaft is fixed with the end of the longitudinal shaft; the stone roller connecting piece is sleeved on the longitudinal shaft and is rotationally connected with one end of the stone roller through a bearing; the axes of the two transverse shafts are parallel to each other, and the axes of the two longitudinal shafts are parallel to each other; the intersection point of the two stone roller axes is positioned on the axis of the driving main shaft; the upper end face of the stone mill is a conical surface, and a rice blocking edge is arranged on the outer peripheral ring of the upper end of the stone mill; the stone mill is provided with a rice discharging hole, and the upper end of the rice discharging hole is inserted with a baffle cover; the upper end of the stone mill is uniformly distributed with a plurality of groups of lower grooves around the axis of the stone mill; each group of lower grooves comprises a plurality of shallow grooves which are parallel to each other, and the shallow grooves included in two adjacent groups of lower grooves form an acute angle; a plurality of upper grooves are uniformly distributed on the outer circular side wall of each stone roller, and each upper groove comprises a plurality of shallow grooves with the same extending direction as the axial direction of the stone roller; the lower end of the Dan Nianpan is provided with a supporting frame, and the side wall of the supporting frame is detachably connected with a plurality of stone plates; the speed reducer and the motor are arranged in the support frame; and an oil-free lubrication bearing is arranged in the rotary connecting piece.

Compared with the prior art, the rice production line has the following advantages:

according to the rice production line, the lifting machine and the belt conveyor are reasonably arranged among the devices, so that the product conveying efficiency and the conveying quality among the devices are effectively improved. Meanwhile, the automatic equipment replaces manual carrying, so that the production cost is further reduced.

The stone mill is added into a rice production line, and meanwhile, motors of the stone mill, the sand roller rice mill and the polishing machine are respectively and electrically connected with a frequency converter, so that an operator can freely adjust the rotating speed of equipment, and the invention can be suitable for producing various rice such as stone mill rice, germ-remaining rice, polished rice and the like. The invention can basically meet the production of all products of manufacturers, and effectively reduce the investment of equipment in the early stage and the maintenance cost of the equipment in the later stage.

The invention also aims to provide a production process for producing stone milled rice by using the rice production line.

(1) Respectively conveying the rice hulls and the brown rice into a rice hull bin and a brown rice bin through a lifting machine of a second grain discharging pit;

(2) The rice hulls and the brown rice are sent into a lifting machine through a belt conveyor arranged below the rice hull bin and the brown rice bin, and are sent into a screw conveyor through the lifting machine, the screw conveyor distributes the mixture of the rice hulls and the brown rice to each buffer bin, and then materials in the buffer bins are scattered on stone mill for processing through manual control; the rotation speed of the stone grinding is 8-12 revolutions per minute;

(3) The product obtained in the step (2) is sent into a lifting machine through a belt conveyor arranged below the stone mill, and is sent into a vibration cleaning sieve through the lifting machine;

(4) The product obtained in the step (3) is sent into a first sand roller rice mill for processing through a lifter and a magnetic separator; the rotation speed of the sand roller rice mill is 200-450 rpm, the carborundum granularity is 60, and the processing time is 25 seconds;

(5) The product obtained in the step (4) is sent into a second sand roller rice mill for processing through a lifter, the rotating speed of the sand roller rice mill is 200-450 r/min, the carborundum granularity is 80, and the processing time is 25 seconds;

(6) The product obtained in the step (5) is sent into a first polishing machine for processing through a lifting machine and a magnetic separator, wherein the processing temperature is 10-15 ℃, the humidity is 80-95%, the rotating speed is 1200 revolutions per minute, and the processing time is 25 seconds;

(7) The product obtained in the step (6) is sent into a second polishing machine for processing through a lifting machine, wherein the processing temperature is 10-15 ℃, the humidity is 80-95%, the rotating speed is 1250 revolutions per minute, and the processing time is 25 seconds;

(8) The product obtained in the step (7) is sent into a first rice classifying screen through a lifter to be screened;

(9) The product obtained in the step (8) is sent into a first color sorter through a lifting machine for screening, and twice color sorting is realized through the lifting machine;

(10) The product obtained in the step (9) is sent into a second color sorter for screening through a lifting machine, and the two color sortings are realized through the lifting machine;

(11) The product obtained in the step (10) is sent into a second rice classifying screen for screening through a lifter;

(12) The product obtained in the step (11) is respectively sent into a broken rice bin and a finished rice bin through a lifting machine;

(13) Delivering the finished products in the finished rice bin into a packaging machine for packaging sequentially through a belt conveyor, a lifting machine and a magnetic separator;

wherein the impurities obtained in the steps (3), (4), (5), (6), (7), (8), (9), (10) and (11) are respectively sent into a dust removing device through pipelines.

The stone milling production process has the same advantages as the rice production line compared with the prior art, and is not repeated here.

The invention also aims to provide a production process for producing the germ-remaining rice by using the rice production line.

(1) Feeding the brown rice into a brown rice bin through a lifter of a second grain discharging pit;

(2) The brown rice is sent into a lifting machine through a belt conveyor arranged below the brown rice bin, and is sent into a vibration cleaning sieve through the lifting machine;

(3) The product obtained in the step (2) is sent into a first sand roller rice mill for processing through a lifter and a magnetic separator; the rotation speed of the sand roller rice mill is 200-450 rpm, the carborundum granularity is 60, and the processing time is 25 seconds;

(4) The product obtained in the step (3) is sent into a second sand roller rice mill through a lifter, the rotating speed of the sand roller rice mill is 200-450 r/min, the carborundum granularity is 80, and the processing time is 25 seconds;

(5) The product obtained in the step (4) is sent into a first polishing machine for processing through a lifting machine and a magnetic separator, wherein the processing temperature is 10-15 ℃, the humidity is 80-95%, the rotating speed is 1200 revolutions per minute, and the processing time is 25 seconds;

(6) The product obtained in the step (5) is sent into a second polishing machine for processing through a lifting machine, wherein the processing temperature is 10-15 ℃, the humidity is 80-95%, the rotating speed is 1250 revolutions per minute, and the processing time is 25 seconds;

the subsequent steps are the same as steps (8) - (13) in the stone milling production process.

The embryo-retaining rice production process has the same advantages as the rice production line compared with the prior art, and is not repeated here.

The invention also aims to provide a production process for producing polished rice by using the rice production line.

(1) Feeding the target rice into a target rice bin through a lifter of the first grain discharging pit;

(2) The standard rice is sent into a lifting machine through a belt conveyor arranged below the standard rice bin, and is sent into a vibration cleaning sieve through the lifting machine;

(3) The product obtained in the step (2) is sent into a first sand roller rice mill for processing through a lifter and a magnetic separator; the rotation speed of the sand roller rice mill is 600-750 rpm, the carborundum granularity is 48, and the processing time is 25 seconds;

(4) The product obtained in the step (3) is sent into a second sand roller rice mill for processing through a lifter, the rotating speed of the sand roller rice mill is 750-800 revolutions per minute, the carborundum granularity is 60, and the processing time is 25 seconds;

(5) The product obtained in the step (4) is sent into a first polishing machine for processing through a lifting machine and a magnetic separator, wherein the processing temperature is 10-15 ℃, the humidity is 80-95%, the rotating speed is 1400 rpm, and the processing time is 25 seconds;

(6) The product obtained in the step (5) is sent into a second polishing machine for processing through a lifting machine, wherein the processing temperature is 10-15 ℃, the humidity is 80-95%, the rotating speed is 1600 rpm, and the processing time is 25 seconds;

The polished rice production process has the same advantages as the rice production line compared with the prior art, and is not repeated here.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 is a top view of a rice production line according to an embodiment of the present invention;

FIG. 2 is a top view of the finishing section of a rice production line according to an embodiment of the present invention;

FIG. 3 is a front view of a finishing zone of a rice production line according to an embodiment of the present invention;

FIG. 4 is a front view of a stone roll area of a rice production line according to an embodiment of the present invention;

FIG. 5 is a left side view of a rice production line according to an embodiment of the present invention;

FIG. 6 is a block diagram of a dust removing device of a rice production line according to an embodiment of the present invention;

FIG. 7 is an isometric view of stone milling of a rice production line according to an embodiment of the present invention;

FIG. 8 is an isometric view of a component of a rice mill in accordance with an embodiment of the present invention positioned above a stone roller;

FIG. 9 is a top view of stone milling of a rice production line according to an embodiment of the present invention;

FIG. 10 is a half cross-sectional view of a magnetic separator of a rice production line according to an embodiment of the present invention;

FIG. 11 is a diagram of a process for producing stone milled rice according to an embodiment of the present invention;

fig. 12 is a process diagram of the production of germ-retaining rice and polished rice according to an embodiment of the present invention.

Reference numerals illustrate:

1-an electric control cabinet; 2-a stone rolling area; 3-Dan Nianmo; 31-stone roller; 311-upper trench; 32-stone roller connection; 33-driving a main shaft; 331-a slide rail; 34-fixing seat; 341-a fixed edge; 35-horizontal axis; 36-stone plate; 37-Dan Nianpan; 371-keep off rice edges; 372-lower groove; 38-longitudinal axis; 39-a blocking cover; 4-finishing zone; 5-lifting machine; 6-brown rice bin; 7-rice hull bin; 8-a second grain pit; 9-marking a rice bin; 10-a first pit; 11-a centrifugal dust remover; 12-a dust removal area; 13-pulse dust collector; 14-a fan; 15-a first broken rice bin; 16-a second broken rice bin; 17-a finished rice bin; 18-vibrating a cleaning screen; 19-a sand roller rice mill; 20-polishing machine; 21-a rice classifying screen; 22-color selector; 23-a buffer bin; 24-screw conveyor; 25-packaging machine; 26-a cylinder; 261-discharging pipe; 27-feeding pipe; 271-arcuate projections; 272-dividing pipe; 28-magnetic separation device; 281-a demagnetizing device; 282-flight conveyor; 283-magnetic field generator; 284-a dust collector; 285-protective shell; 29-air seal.

Detailed Description

It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.

The invention will be described in detail below with reference to the drawings in connection with embodiments.

1-9, the invention provides a rice production line, which comprises a finishing area 4, wherein a vibration cleaning screen 18, two sand roller rice mills 19, two polishing machines 20 and two rice classifying screens 21 are sequentially arranged in the finishing area; two color selectors 22 are arranged between the two rice classifying screens 21; the discharge port of the former equipment is connected with the feed port of the adjacent latter equipment through a lifting machine 5; the motors of the sand roller rice mill 19 and the polishing machine 20 are respectively and electrically connected with frequency converters; the dust removing area 12 is provided with a dust removing device which is respectively connected with a vibration cleaning screen 18, a sand roller rice mill 19, a polishing machine 20, a white rice classifying screen 21 and a color selector 22 through closed pipelines; the raw material storage area is positioned on one side of the finishing area 4 close to the vibration cleaning screen 18 and comprises a standard one-meter bin 9, a first grain pit 10 is arranged on one side of the standard one-meter bin 9 away from the finishing area 4, and a lifting machine 5 communicated with the standard one-meter bin 9 is arranged in the first grain pit 10; a belt conveyor is arranged below the discharge port of the standard one-meter bin 9, and the discharge end of the belt conveyor is connected with the feed port of the vibration cleaning screen 18 through a lifting machine 5; the finished product packaging area is positioned on one side of the finish machining area 4, which is close to the rice classifying screen 21, and comprises a broken rice bin and a finished product rice bin 17, wherein a belt conveyor is arranged below the broken rice bin and the finished product rice bin, and the discharging end of the belt conveyor is connected with the feeding port of the packaging machine 25 through a lifting machine 5.

The stone grinding area 2 is provided with a plurality of stone grinding holes 3, a belt conveyor is arranged below a discharge hole of the stone grinding holes 3, and the discharge end of the belt conveyor is positioned right above the belt conveyor below the standard one-meter bin 9; the raw material storage area further comprises a rice hull bin 7 and a brown rice bin 6, a second lower grain pit 8 is arranged on one side, away from the stone milling area 2, of the two, and a lifting machine 5 which is respectively communicated with the rice hull bin 7 and the brown rice bin 6 is arranged in the second lower grain pit 8; a belt conveyor is arranged below the rice husk bin 7 and the brown rice bin 6, the discharging ends of the belt conveyor are communicated with screw conveyors 24 through a lifter 5, the number of the screw conveyors 24 is two, and a plurality of buffer bins 23 are arranged at the lower end of each screw conveyor 24 along the extending direction of the screw conveyors; there are two surge bins 23 per stone mill 3 directly above Fang Jun.

The stone grinding area 2 and the finishing area 4 are respectively provided with an upper layer and a lower layer; wherein the vibration cleaning screen 18, the sand roller rice mill 19, the polishing machine 20, the polished rice classifying screen 21 and the color selector 22 are all arranged on the upper layer of the finish machining area 4, and the stone mill 3 is arranged on the upper layer of the stone milling area 2; all the above belt conveyors are placed under the stone roller zone 2 and finishing zone 4. The structure facilitates the on-site workers to observe the conveying condition and the process products and also facilitates the maintenance of equipment.

Magnetic separators are respectively arranged between the feed inlet of the sand roller rice mill 19 and the lifting machine 5, between the feed inlet of the polishing machine 20 and the lifting machine 5, and between the feed inlet of the packing machine 25 and the lifting machine 5.

As shown in fig. 10, the magnetic separator comprises a hollow cylinder 26, and a feeding pipe 27 extending into the cylinder 26 is fixed at the center of the upper end of the cylinder 26; the end part of the feeding pipe 27 in the cylinder 26 is closed, an upward arc-shaped protrusion 271 is arranged on the inner side of the end part, and a plurality of inclined downward material dividing pipes 272 are arranged on the side wall of the feeding pipe 27 in the cylinder 26; this structure enables the finished product entering from the feed pipe 27 to be uniformly dispersed through the dividing pipe 272.

A plurality of magnetic separation devices 28 are uniformly distributed on the side wall of the cylinder 26 around the axis of the cylinder, and each magnetic separation device 28 corresponds to one material separation pipe 272. Magnetic separator 28 includes a counter-clockwise rotating chain conveyor 282 having chain plates that are magnetic media; one side of the link plate conveyor 282 is positioned inside the cylinder 26, the other side is positioned outside the cylinder 26, and the lower part of the link plate conveyor 282 is inclined into the cylinder 26; a magnetic field generator 283 and a degaussing device 281 are fixed at the outer part of the cylinder 26 near the chain plate conveyor 282, and the degaussing device 281 is positioned above the magnetic field generator 283; a dust collector 284 is arranged between the magnetic field generator 283 and the demagnetizing equipment 281, and a plurality of brushes which are propped against the chain plates are arranged on a suction port of the dust collector 284; magnetic separator 28 also includes a protective shell 285 secured to the outside of drum 26; the bottom of the inner side of the cylindrical body 26 is inclined downward, and a tapping pipe 261 is fixed.

In use, the process product with screening enters the magnetic separator from feed tube 27 and contacts the portion of drag conveyor 282 located inside drum 26 via split tube 272. The counterclockwise rotating link plate conveyor 282 is in sufficient contact with the process product and adsorbs the magnetic impurities mixed therein. The chain plate to which the magnetic impurities are adsorbed continues to rotate and enters the demagnetizing device 281. The magnetism of the chain plate passing through the demagnetizing equipment 281 disappears, and the magnetic impurities are not adsorbed; some of the magnetic impurities fall down and are sucked away by the dust collector 284, and another part continue to adhere to the link plate due to other forces. The link plate continues to rotate, and after the link plate contacts the brush, the magnetic impurities attached to the link plate are completely cleaned by the brush and sucked away by the dust collector 284.

After that, the chain plate enters the magnetic field generator 283, and under the action of the magnetic field generator 283, the chain plate generates magnetism again and continues to enter the cylinder 26 for adsorbing impurities.

The dust removing devices are in three groups, and each group of dust removing device comprises a pulse dust remover 13 communicated with an air inlet of a fan 14 through a closed pipeline and at least one centrifugal dust remover 11 communicated with an air outlet of the fan 14 through a pipeline; the pulse dust collector 13 and the centrifugal dust collector 11 are respectively provided with a fan 29.

The stone mill includes a drive spindle 33 extending through a stone mill 37; the upper part of the driving main shaft 33 is sleeved with a fixed seat 34, the lower part of the driving main shaft is connected with a motor through a speed reducer, and the motor is electrically connected with a frequency converter; the fixing seat 34 is provided with two groups of rotary connecting pieces, each group of rotary connecting pieces is rotationally connected with one stone roller 31, and the two stone rollers 31 are symmetrically arranged along the axis of the driving main shaft 33.

A sliding rail 331 is arranged on the outer side wall of the driving spindle 33 along the axial direction thereof, and the upper end and the lower end of the sliding rail 331 respectively extend out of the fixed seat 34 and are in sliding fit with a sliding groove on the fixed seat 34; the upper end and the lower end of the fixed seat 34 are respectively provided with a fixed edge 341, each fixed edge 341 is connected with a bolt in a threaded manner, and the tail end of each bolt abuts against the outer side wall of the driving main shaft 33. During initial debugging, the bolts are loosened, and the fixing seat 34 is slid up and down along the sliding rail 331 to adjust the height thereof. After the adjustment is completed, the fixing base 34 is fixed to the driving spindle 33 at a proper height by tightening the bolts. When the main shaft 33 is driven to rotate, the fixing seat 34 can be driven to rotate.

Each set of said rotary connectors comprises a transverse shaft 35 in rotary connection with said fixed seat 34; the transverse shaft 35 is horizontally arranged, and two ends of the transverse shaft extend out of the fixed seat 34; one end of the transverse shaft 35 is fixed to the end of the longitudinal shaft 38; the longitudinal shaft 38 is sleeved with a stone roller connecting piece 32, and the stone roller connecting piece 32 is rotatably connected with one end of the stone roller 31 through a bearing.

As shown in fig. 8, the ends of the transverse axis 35 and the longitudinal axis 38 are fixedly connected, and the two are at an angle of right angle; the other ends of the transverse shaft 35 and the longitudinal shaft 38 are respectively provided with a fastener for preventing the transverse shaft 35 from axially moving along the longitudinal shaft 38 and the stone roller connecting piece 32 from axially moving along the longitudinal shaft 35.

When one of the stone rollers 31 is lifted up as a whole, it rotates about the axis of the transverse shaft 35; when one end of one of the stone rollers 31 is raised, it rotates about the longitudinal axis 38. By both the above-mentioned cases, the stone roller 31 can meet different situations of rice accumulation by rotating the connecting member.

The axes of the two transverse shafts 35 are parallel to each other, and the axes of the two longitudinal shafts 38 are parallel to each other. The intersection of the axes of the two stone rollers 31 is located on the axis of the drive spindle 33. The two stone rollers 31 are symmetrically arranged and balanced with each other, so that the present invention operates smoothly.

The upper end surface of the stone roller 37 is a conical surface, and a rice blocking edge 371 is arranged on the outer circumference of the upper end of the stone roller 37; the stone roller 37 is provided with a rice discharging hole, and the upper end of the rice discharging hole is inserted with a baffle cover 39. Because the up end of stone roller 37 is the circular conical surface, adopts the structure that keeps off rice edge 371, avoids corn to follow stone roller 37 and slide down in the course of working, causes the waste of product. The blocking cover 39 on the rice discharging hole is used for preventing the product which is not processed from falling from the rice discharging hole, so that the whole quality of the product is reduced.

The upper end of the stone roller 37 is uniformly distributed with a plurality of groups of lower grooves 372 around the axis; each set of lower grooves 372 includes a plurality of parallel shallow grooves, and the shallow grooves included in two adjacent sets of lower grooves 372 are at an acute angle. As shown in fig. 9, there is an annular area between the lower groove 372 and the rice blocking rim 371, and since the stone roller 31 does not act on this area, the processed rice can be temporarily placed in this area and then sent to the rice discharging hole by the worker.

A plurality of upper grooves 311 are uniformly distributed on the outer circumferential side wall of each stone roller 31, and each upper groove 311 comprises a plurality of shallow grooves with the same extending direction as the axial direction of each stone roller 31.

The lower end of the stone roller 37 is provided with a supporting frame, and the side wall of the supporting frame is detachably connected with a plurality of stone plates 36; the speed reducer and the motor are arranged in the supporting frame. The structure not only ensures that the invention has simple structure and attractive appearance; the motor and the speed reducer can also be protected by the stone plates 36.

An oil-free lubrication bearing is arranged in the rotary connecting piece. The structure reduces maintenance frequency and simplifies maintenance process.

When in use, the rotating speed of the stone roller 31 is regulated by the frequency converter according to the processing requirements of different rice seeds. After the conditioning is completed, the mixture of brown rice and rice hulls to be processed is sprinkled on the stone roller 37 and is uniformly disposed by hand in the area Dan Nianpan 37 with the lower groove 372. Since the stone roller 31 of the present invention is connected with the rotary connector, it does not occur that a large amount of brown rice is crushed by the stone roller 31 when the mixture is manually arranged.

After the brown rice is processed by the stone roller 31 to form rice, a worker may first rapidly sweep the brown rice away from the lower groove 372 area in the radial direction of the stone roller 37, and then send the processed rice to the next process through the rice discharge hole.

As shown in fig. 11, when the stone milled rice is required to be produced, firstly, rice hulls and brown rice are respectively sent into a rice hull bin 7 and a brown rice bin 6 through a lifter 5 in a second grain discharging pit 8, and a worker adjusts the rotation speeds of the stone mill 3, a sand roller rice mill 19 and a polishing machine 20 through an electric control cabinet 1 so as to be suitable for the processing of the stone milled rice; the rice hulls and the brown rice are sent into a lifting machine 5 through a belt conveyor arranged below a rice hull bin 7 and a brown rice bin 6, and are sent into a screw conveyor 24 through the lifting machine 5, the screw conveyor 24 distributes the mixture of the rice hulls and the brown rice to each buffer bin 23, and then the materials in the buffer bins 23 are scattered on the stone mill 3 for processing through manual control; the rotation speed of the stone grinding is 8-12 revolutions per minute;

the product processed by the stone mill 3 is sent into the elevator 5 through a belt conveyor arranged below the stone mill 3, and is sent into the vibration cleaning screen 18 through the elevator 5; the product obtained by the vibration cleaning screen 18 is sent into a first sand roller rice mill 19 for processing through a lifter and a magnetic separator; the rotational speed of the sand roller rice mill 19 is 200 to 450 rpm, the carborundum grain size is 60, and the processing time is 25 seconds.

After one grinding, the obtained product is sent to a second sand roller rice mill 19 through a lifter 5, the rotation speed of the sand roller rice mill 19 is 200-450 r/min, the carborundum granularity is 80, and the processing time is 25 seconds.

After secondary grinding, the obtained product is sent into a first polishing machine 20 through a lifting machine 5 and a magnetic separator for processing, wherein the processing temperature is 10-15 ℃, the humidity is 80-95%, the rotating speed is 1200 revolutions per minute, and the processing time is 25 seconds.

The product after primary polishing is sent to a second polishing machine 20 for processing by a lifter 5, the processing temperature is 10-15 ℃, the humidity is 80-95%, the rotating speed is 1250 revolutions per minute, and the processing time is 25 seconds.

The product after secondary polishing is sent into a first rice classifying screen 21 for screening through a lifter 5; and after primary screening, the obtained good products are sent into a first color sorter 22 through a lifter 5 for screening, and enter a second color sorter 22 through the lifter 5 corresponding to the color sorter 22 to realize twice color sorting.

The obtained good products are screened by a second rice classifying screen 21. The screened good products are the final products, and are sent into a finished rice bin 17 through a lifter 5; the obtained broken rice is divided into large broken rice and small broken rice by its mass, and sent to a first broken rice bin 15 and a second broken rice bin 16 respectively.

Finally, the products in the finished rice bin 17 are sent to a packing machine 25 for packing through a belt conveyor, a lifter 5 and a magnetic separator in sequence. Impurities generated in the production process are sent into the dust removing device through a pipeline.

As shown in fig. 12, when the embryo rice is required to be produced, firstly, the brown rice is sent into a brown rice bin 6 through an inner lifting machine 5 of a second grain discharging pit 8; the worker adjusts the rotation speeds of the sand roller rice mill 19 and the polishing machine 20 so as to be suitable for processing the remained embryo rice; the brown rice is fed into the elevator 5 by a belt conveyor placed under the brown rice bin 6, and is fed into the vibration cleaning screen 18 by the elevator 5.

The product obtained by the vibration cleaning screen 18 is sent into a first sand roller rice mill 19 for processing through a lifter and a magnetic separator; the rotational speed of the sand roller rice mill 19 is 200 to 450 rpm, the carborundum grain size is 60, and the processing time is 25 seconds.

After one grinding, the obtained product is sent to a second sand roller rice mill 19 for processing by a lifter 5, the rotation speed of the sand roller rice mill 19 is 200-450 r/min, the carborundum granularity is 80, and the processing time is 25 seconds.

The subsequent screening and packaging steps are the same as those in stone-milled rice production and will not be described in detail here.

When polished rice is required to be produced, as shown in fig. 12, firstly, one-meter is sent into the one-meter-marking bin 9 through the inner lifting machine 5 of the first grain pit 10; the worker adjusts the rotation speeds of the sand roller rice mill 19 and the polishing machine 20 so as to be suitable for processing polished rice; the target rice is sent to the elevator 5 by a belt conveyor arranged below the target rice bin 9, and is sent to the vibration cleaning screen 18 by the elevator 5.

The product obtained by the vibration cleaning screen 18 is sent into a first sand roller rice mill 19 for processing through a lifter and a magnetic separator; the rotation speed of the sand roller rice mill 19 is 600-750 rpm, the carborundum granularity is 48, and the processing time is 25 seconds.

After one grinding, the obtained product is sent to a second sand roller rice mill 19 through a lifter 5, the rotation speed of the sand roller rice mill 19 is 750-800 revolutions per minute, the carborundum granularity is 60, and the processing time is 25 seconds.

After secondary grinding, the obtained product is sent into a first polishing machine 20 through a lifter 5 and a magnetic separator for processing, wherein the processing temperature is 10-15 ℃, the humidity is 80-95%, the rotating speed is 1400 revolutions per minute, and the processing time is 25 seconds.

The product after primary polishing is sent to a second polishing machine 20 for processing by a lifter 5, the processing temperature is 10-15 ℃, the humidity is 80-95%, the rotating speed is 1600 rpm, and the processing time is 25 seconds.

The stone mill 3 is added into a rice production line, and meanwhile, motors of the stone mill 3, the sand roller rice mill 19 and the polishing machine 20 are respectively and electrically connected with frequency converters, so that an operator can freely adjust the rotating speed of equipment, and the invention can be suitable for producing various rice such as stone mill rice, germ rice, polished rice and the like. The invention can basically meet the production of all products of manufacturers, and effectively reduce the investment of equipment in the early stage and the maintenance cost of the equipment in the later stage.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.

Claims

1. A rice production line, comprising:

the finishing area (4) is provided with a vibration cleaning screen (18), two sand roller rice mills (19), two polishing machines (20) and two polished rice classifying screens (21) in sequence; two color selectors (22) are arranged between the two rice classifying screens (21); the discharge port of the former equipment is connected with the feed port of the adjacent latter equipment through a lifting machine (5); the motors of the sand roller rice mill (19) and the polishing machine (20) are respectively and electrically connected with frequency converters;

the dust removing area (12) is provided with a dust removing device, and the dust removing device is respectively connected with the vibration cleaning screen (18), the sand roller rice mill (19), the polishing machine (20), the white rice classifying screen (21) and the color selector (22) through closed pipelines;

the raw material storage area is positioned on one side of the finish machining area (4) close to the vibration cleaning screen (18) and comprises a standard one-meter bin (9), a first grain pit (10) is arranged on one side of the standard one-meter bin (9) away from the finish machining area (4), and a lifting machine (5) communicated with the standard one-meter bin (9) is arranged in the first grain pit (10); a belt conveyor is arranged below the discharge hole of the standard one-meter bin (9), and the discharge end of the belt conveyor is connected with the feed inlet of the vibration cleaning screen (18) through a lifting machine (5);

the finished product packaging area is positioned at one side of the finish machining area (4) close to the rice classifying screen (21) and comprises a broken rice bin and a finished product rice bin (17), a belt conveyor is arranged below the broken rice bin and the finished product rice bin, the discharging end of the belt conveyor is connected with a feeding port of the packaging machine (25) through a lifting machine (5),

The stone grinding area (2) is provided with a plurality of stone grinding areas (3), a belt conveyor is arranged below a discharge hole of the Dan Nianmo (3), and the discharge end of the belt conveyor is positioned right above the belt conveyor below the standard one-meter bin (9);

the raw material storage area further comprises a rice hull bin (7) and a brown rice bin (6), a second lower grain pit (8) is arranged on one side, away from the stone milling area (2), of the two, and a lifting machine (5) which is respectively communicated with the rice hull bin (7) and the brown rice bin (6) is arranged in the second lower grain pit (8); a belt conveyor is arranged below the rice hull bin (7) and the brown rice bin (6), the discharging end of the belt conveyor is communicated with a screw conveyor (24) through a lifting machine (5), and a plurality of buffer bins (23) are arranged at the lower end of the screw conveyor (24) along the extending direction of the screw conveyor; a buffer bin (23) is correspondingly arranged right above each stone mill (3),

the stone milling area (2) and the finishing area (4) are respectively provided with an upper layer and a lower layer; the vibration cleaning screen (18), the sand roller rice mill (19), the polishing machine (20), the white rice classifying screen (21) and the color selector (22) are all arranged on the upper layer of the finish machining area (4), and the Dan Nianmo (3) is arranged on the upper layer of the stone milling area (2); all the belt conveyors are arranged at the lower layers of the stone grinding area (2) and the finish machining area (4),

magnetic separators are respectively arranged between the feed inlet of the sand roller rice mill (19) and the lifting machine (5), between the feed inlet of the polishing machine (20) and the lifting machine (5) and between the feed inlet of the packing machine (25) and the lifting machine (5),

The magnetic separator comprises a hollow cylinder (26), and a feeding pipe (27) extending into the magnetic separator is fixed at the central position of the upper end of the cylinder (26); the end part of the feeding pipe (27) in the cylinder (26) is closed, an upward arc-shaped protrusion (271) is arranged on the inner side of the end part, and a plurality of inclined downward material dividing pipes (272) are arranged on the side wall of the feeding pipe (27) in the cylinder (26);

a plurality of magnetic separation devices (28) are uniformly distributed on the side wall of the cylinder (26) around the axis of the cylinder, each magnetic separation device (28) comprises a chain plate conveyor (282) which rotates anticlockwise, and the chain plates are magnetic media; one side of the chain plate conveyor (282) is positioned in the barrel (26), the other side of the chain plate conveyor is positioned outside the barrel (26), and the lower part of the chain plate conveyor (282) is inclined into the barrel (26); a magnetic field generator (283) and a degaussing device (281) are fixed at the outer part of the cylinder (26) close to the chain plate conveyor (282), and the degaussing device (281) is positioned above the magnetic field generator (283);

a dust collector (284) is arranged between the magnetic field generator (283) and the demagnetizing equipment (281), and a plurality of brushes which are propped against the chain plate are arranged on the suction inlet of the dust collector (284);

the magnetic separation device (28) also comprises a protective shell (285) fixed on the outer side of the cylinder (26);

the bottom of the inner side of the cylinder body (26) is inclined downwards, and a discharging pipe (261) is fixed.

2. The rice production line of claim 1, wherein: the dust removing devices are in three groups, and each group of dust removing device comprises a pulse dust collector (13) communicated with an air inlet of a fan (14) through a closed pipeline and at least one centrifugal dust collector (11) communicated with an air outlet of the fan (14) through a pipeline; the pulse dust collector (13) and the centrifugal dust collector (11) are respectively provided with a wind-closing device (29).

3. The rice production line of claim 1, wherein: the stone mill comprises a drive spindle (33) which extends through Dan Nianpan (37); the upper part of the driving main shaft (33) is sleeved with a fixed seat (34), the lower part of the driving main shaft is connected with a motor through a speed reducer, and the motor is electrically connected with a frequency converter; the fixed seat (34) is provided with two groups of rotary connecting pieces, each group of rotary connecting pieces is rotationally connected with one stone roller (31), and the two stone rollers (31) are symmetrically arranged along the axis of the driving main shaft (33);

a sliding rail (331) is arranged on the outer side wall of the driving main shaft (33) along the axial direction of the driving main shaft, and the upper end and the lower end of the sliding rail (331) respectively extend out of the fixed seat (34) and are in sliding fit with a sliding groove on the fixed seat (34); the upper end and the lower end of the fixed seat (34) are respectively provided with a fixed edge (341), each fixed edge (341) is connected with a bolt in a threaded manner, and the tail end of each bolt abuts against the outer side wall of the driving main shaft (33);

Each group of the rotary connecting pieces comprises a transverse shaft (35) which is rotationally connected with the fixed seat (34); the transverse shaft (35) is horizontally arranged, and two ends of the transverse shaft extend out of the fixing seat (34); one end of the transverse shaft (35) is fixed with the end of the longitudinal shaft (38); a stone roller connecting piece (32) is sleeved on the longitudinal shaft (38), and the stone roller connecting piece (32) is rotationally connected with one end of the stone roller (31) through a bearing;

the axes of the two transverse shafts (35) are parallel to each other, and the axes of the two longitudinal shafts (38) are parallel to each other; the intersection point of the axes of the two stone rollers (31) is located on the axis of the driving main shaft (33);

the upper end face of the Dan Nianpan (37) is a conical surface, and a rice blocking edge (371) is arranged on the outer circumference of the upper end of the stone mill (37); dan Nianpan (37) is provided with a rice discharging hole, and the upper end of the rice discharging hole is inserted with a baffle cover (39); the upper end of the Dan Nianpan (37) is uniformly distributed with a plurality of groups of lower grooves (372) around the axis; each group of lower grooves (372) comprises a plurality of shallow grooves which are parallel to each other, and the shallow grooves included in two adjacent groups of lower grooves (372) form an acute angle; a plurality of upper grooves (311) are uniformly distributed on the outer circular side wall of each stone roller (31), and each upper groove (311) comprises a plurality of shallow grooves with the same extending direction as the axial direction of each stone roller (31);

The lower end of the Dan Nianpan (37) is provided with a supporting frame, and the side wall of the supporting frame is detachably connected with a plurality of stone plates (36); the speed reducer and the motor are arranged in the support frame; and an oil-free lubrication bearing is arranged in the rotary connecting piece.

4. A stone-milled rice production process using the rice production line according to any one of claims 1 to 3: the method is characterized by comprising the following steps of:

(9) The product obtained in the step (8) is sent into a first color selector for screening through a lifter;

(10) The product obtained in the step (9) is sent into a second color selector for screening through a lifter;

5. A process for producing germ-retaining rice using the rice production line of any one of claims 1 to 3: the method is characterized by comprising the following steps of:

(4) The product obtained in the step (3) is sent into a second sand roller rice mill for processing through a lifter, the rotating speed of the sand roller rice mill is 200-450 r/min, the carborundum granularity is 80, and the processing time is 25 seconds;

(7) The product obtained in the step (6) is sent into a first rice classifying screen through a lifter to be screened;

(8) The product obtained in the step (7) is sent into a first color selector for screening through a lifter;

(9) The product obtained in the step (8) is sent into a second color selector for screening through a lifter;

(10) The product obtained in the step (9) is sent into a second rice classifying screen for screening through a lifter;

(11) The product obtained in the step (10) is respectively sent into a broken rice bin and a finished rice bin through a lifting machine;

(12) Delivering the finished products in the finished rice bin into a packaging machine for packaging sequentially through a belt conveyor, a lifting machine and a magnetic separator;

wherein the impurities obtained in the steps (2), (3), (4), (5), (6), (7), (8), (9) and (10) are respectively sent into a dust removing device through pipelines.

6. A polished rice production process using the rice production line according to any one of claims 1 to 3: the method is characterized by comprising the following steps of:

(5) The product obtained in the step (4) is sent into a first polishing machine for processing through a lifting machine and a magnetic separator, the processing temperature is 10-15 ℃, the humidity is 80-95%, the rotating speed is 1400 rpm,

the processing time is 25 seconds;