CN112452389A

CN112452389A - Rice mill

Info

Publication number: CN112452389A
Application number: CN202011424652.XA
Authority: CN
Inventors: 范吉军; 王立宗; 余南辉; 叶焕; 雷港; 曹梅丽; 严清华; 杨红军
Original assignee: Wuhan Polytechnic University
Current assignee: Wuhan Polytechnic University
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-03-09
Anticipated expiration: 2040-12-08
Also published as: CN112452389B

Abstract

The invention provides a rice mill, comprising: the rice milling mechanism comprises a sand roller which is rotatably arranged in the rice milling chamber, a rotating shaft of the sand roller extends along the transverse direction, a mounting cavity is formed in the sand roller, and an air blowing port is formed in the sand roller; the air injection mechanism comprises a hollow shaft arranged in the mounting cavity, a second air channel extending along the axial direction of the hollow shaft is formed in the hollow shaft, a plurality of air injection assemblies are arranged on the hollow shaft, and each air injection assembly is communicated with the second air channel and is butted with each air blowing port so as to be communicated with the second air channel and the first air channel; and the temperature control device is arranged in the rice milling chamber and used for regulating and controlling the temperature in the rice milling chamber. The invention provides a rice mill, and aims to solve the problem that rice bran is condensed at low temperature and blocks a rice screen when the temperature in the rice mill is low in the traditional technology.

Description

Rice mill

Technical Field

The invention belongs to the technical field of rice mills, and particularly relates to a rice mill.

Background

The rice mill in the traditional technology can not adjust the temperature in the rice milling chamber, when the temperature is lower in winter, the rice bran is condensed at low temperature and blocks a rice screen due to more grease components in the rice bran, the rice screen needs to be cleaned in time after being blocked, otherwise a large amount of rice bran appears at a discharge chute, and the blockage of the rice bran discharge can cause the blockage of materials in the rice milling chamber to increase a large amount of broken rice; if open the air jet subassembly when temperature is lower simultaneously, can lead to the inside temperature of rice mill lower, can aggravate the problem that the rice bran blockked up.

Disclosure of Invention

Based on the above, the invention provides a rice mill, which aims to solve the problem that rice bran is condensed at low temperature and blocks a rice screen when the internal temperature of the rice mill is low in the traditional technology.

In order to achieve the purpose, the invention provides the following technical scheme:

a rice mill, comprising:

the rice milling machine comprises a machine body, wherein a rice milling chamber is arranged in the machine body, a first air channel is formed in the rice milling chamber, and an air suction opening and an air inlet which are communicated with the first air channel are respectively formed in the machine body;

the rice milling mechanism comprises a sand roller which is rotatably arranged in the rice milling chamber, a rotating shaft of the sand roller extends along the transverse direction, a mounting cavity is formed in the sand roller, and an air blowing port is formed in the sand roller;

the air injection mechanism comprises a hollow shaft arranged in the mounting cavity, a second air channel extending along the axial direction of the hollow shaft is formed in the hollow shaft, a plurality of air injection assemblies are arranged on the hollow shaft, and each air injection assembly is communicated with the second air channel and is butted with each air blowing port so as to be communicated with the second air channel and the first air channel;

the fan is arranged at one end of the hollow shaft, is communicated with the second air channel and is used for supplying air to the second air channel; and the number of the first and second groups,

and the temperature control device is arranged in the rice milling chamber and used for regulating and controlling the temperature in the rice milling chamber.

Optionally, the rice milling mechanism further comprises a rice screen sleeved on the periphery of the sand roller, and a whitening chamber for milling rice is formed between the periphery of the sand roller and the rice screen;

the rice milling chamber is characterized in that two inner walls which are oppositely arranged from top to bottom are respectively provided with an installation beam which extends along the transverse direction, two ends of the rice screen are detachably connected to the two installation beams respectively, one end of each installation beam facing the rice screen is provided with a rice knife, and each rice knife extends into the whitening chamber respectively.

Optionally, the temperature control device comprises a first heating device arranged on the air injection mechanism, a second heating device arranged at the air inlet, and a controller arranged on the machine body, wherein the controller is electrically connected with the first heating device and the second heating device and used for adjusting the temperature in the rice milling chamber;

the first heating device is used for adjusting the air supply temperature of the air spraying mechanism, and the second heating device is used for controlling the air inlet temperature of the air inlet.

Optionally, a plurality of pairs of air injection port groups are formed in the hollow shaft, the air injection port groups are distributed at intervals along the axial direction of the hollow shaft, each pair of air injection port groups comprises two air injection ports which are arranged oppositely in the radial direction, a plurality of air injection assemblies are correspondingly arranged in the air injection port groups one by one, an air injection channel extending along the radial direction of the hollow shaft is formed in each air injection assembly, and each air injection channel is respectively communicated with the first air channel and the second air channel;

the first heating device comprises a plurality of air injection port heat sources detachably connected to the air injection mechanism, and the air injection port heat sources are arranged in the air injection channels in a one-to-one correspondence mode.

Optionally, the air injection assembly includes two air injection pipes, the air injection passage is formed in each air injection pipe, and one air injection port heat source is arranged between every two air injection pipes.

Optionally, each of the air injection heat sources comprises:

a first resistor;

the mounting rack is arranged at two opposite ends of the resistor; and the number of the first and second groups,

and the buckle assembly is movably arranged on each mounting frame and is used for fixing two ends of the air injection port heat source to the corresponding two air injection pipes respectively.

Optionally, the air suction opening is formed in the upper end of the rice milling chamber, the air inlet is formed in the lower end of the rice milling chamber, and a suction fan is arranged at the air suction opening and used for driving air flow to flow into the rice milling chamber from the air inlet and flow out from the air suction opening;

the rice milling chamber is close to the inner wall downwardly extending of air inlet department forms air inlet channel, second heating device is including locating second resistance in the air inlet channel.

Optionally, a heat insulation plate is arranged on one side, close to the air inlet, of the rice screen, the heat insulation plate extends in the transverse direction, and the second resistor is located on one side, far away from the rice screen, of the heat insulation plate.

Optionally, the heat insulation plate comprises two sub-plates arranged along the transverse direction, and the two sub-plates are arranged away from each other from bottom to top.

Optionally, the rice mill still including the branch locate rice screen cloth week side on a plurality of temperature sensor, the controller with a plurality of temperature sensor electric connection is used for the basis temperature sensor's temperature measurement result adjusts the indoor temperature of whitening.

According to the technical scheme provided by the invention, the rice milling machine comprises the temperature control device arranged in the rice milling chamber, the temperature control device is used for regulating and controlling the indoor temperature of the rice milling chamber, the temperature in the rice milling chamber can be accurately regulated and controlled, the condition that grease components in rice bran are condensed at low temperature is reduced, the blockage of a rice sieve mesh is avoided, and the rice milling effect is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of a cross-sectional view of an embodiment of a rice mill according to the present invention;

FIG. 2 is a schematic diagram of a cross-sectional view of a rice milling mechanism of the rice mill shown in FIG. 1;

FIG. 3 is a schematic diagram of a half-sectional view of a rice milling mechanism of the rice mill shown in FIG. 1;

FIG. 4 is a schematic diagram of a three-dimensional structure of the air injection mechanism in FIG. 1;

FIG. 5 is a schematic diagram of a cross-sectional structure of the air spout tube of FIG. 4;

FIG. 6 is a schematic view of the assembly of the air injection pipe and the air injection port heat source in FIG. 4;

FIG. 7 is an assembled view of the heat source of the tuyere of FIG. 4;

FIG. 8 is a schematic perspective view of the heat source of the tuyere of FIG. 4;

FIG. 9 is a schematic diagram of a portion of the snap assembly of FIG. 8;

FIG. 10 is a schematic diagram of a three-dimensional structure of the air inlet of FIG. 1;

FIG. 11 is a cloud of the air flow velocity inside the rice mill at the horizontal position of the air injection pipe in FIG. 1;

FIG. 12 is a vector diagram of the air velocity inside the rice mill when the air injection pipe in FIG. 1 is in a horizontal position;

FIG. 13 is a graph of the internal airflow temperature field of the rice mill with the horizontal position of the air injection pipe in FIG. 1;

FIG. 14 is a cloud of the air flow velocity inside the rice mill at the horizontal position of the air injection pipe in FIG. 1;

FIG. 15 is a vector diagram of the air velocity inside the rice mill when the air injection pipe in FIG. 1 is in a horizontal position;

FIG. 16 is a graph of the internal airflow temperature field of the rice mill with the horizontal position of the air injection pipe in FIG. 1;

fig. 17 is a schematic view of the distribution of the sand roll air blowing openings in fig. 1.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, back, top and bottom … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

In view of this, the present invention provides a rice mill 1, and fig. 1 in the attached drawings of the present specification is a schematic diagram of a cross-sectional structure of an embodiment of the rice mill 1 according to the present invention; FIG. 2 is a schematic diagram of a sectional view of a rice milling mechanism 20 of the rice milling machine 1 in FIG. 1; FIG. 3 is a schematic diagram of a half-sectional view of a rice milling mechanism 20 of the rice milling machine 1 in FIG. 1; fig. 4 is a schematic perspective view of the air blowing mechanism 1000 in fig. 1; FIG. 5 is a schematic cross-sectional view of the air nozzle 220 of FIG. 4; FIG. 6 is a schematic view of the assembly of the air injection pipe 220 and the air injection port heat source 230 in FIG. 4; FIG. 7 is an assembled view of the tuyere heat source 230 of FIG. 4; FIG. 8 is a schematic perspective view of the tuyere heat source 230 in FIG. 4; FIG. 9 is a schematic diagram of a portion of the snap assembly 233 of FIG. 8; fig. 10 is a schematic diagram of a three-dimensional structure of the air suction opening 12 in fig. 1; FIG. 11 is a cloud view of the air flow velocity inside the rice mill 1 with the air injection pipe 220 in FIG. 1 in a horizontal position; FIG. 12 is a vector diagram of the air velocity inside the rice mill 1 when the air injection pipe 220 in FIG. 1 is horizontal; FIG. 13 is a diagram of the temperature field of the air flow inside the rice mill 1 with the air injection pipe 220 in FIG. 1 in a horizontal position; FIG. 14 is a cloud view of the air flow velocity inside the rice mill 1 with the air injection pipe 220 in FIG. 1 in a horizontal position; FIG. 15 is a vector diagram of the air velocity inside the rice mill 1 when the air injection pipe 220 in FIG. 1 is horizontal; FIG. 16 is a graph of the temperature field of the air flow inside the rice mill 1 with the air injection pipe 220 in FIG. 1 in a horizontal position; fig. 17 is a schematic view of the distribution of the air blowing ports 212 of the sand roll 21 of fig. 1.

The invention discloses a rice mill 1, comprising: the rice milling machine comprises a machine body, wherein a rice milling chamber 10 is arranged in the machine body, a first air duct 11 is formed in the rice milling chamber 10, and an air suction opening 12 and an air inlet 13 which are communicated with the first air duct 11 are respectively formed in the machine body; the rice milling mechanism 20 comprises a sand roller 21 which is rotatably arranged in the rice milling chamber 10, a rotating shaft of the sand roller 21 extends along the transverse direction, a mounting cavity 211 is formed in the sand roller 21, and an air blowing port 212 is formed in the sand roller 21; the air injection mechanism 1000 comprises a hollow shaft 100 arranged in the mounting cavity 211, a second air duct 110 extending along the axial direction of the hollow shaft 100 is formed in the hollow shaft 100, a plurality of air injection assemblies 200 are arranged on the hollow shaft 100, and each air injection assembly 200 is communicated with the second air duct 110 and is butted with each air blowing port 212 so as to communicate the second air duct 110 with the first air duct 11; the fan 300 is arranged at one end of the hollow shaft 100, communicated with the second air duct 110 and used for supplying air to the second air duct 110; and the temperature control device 30 is arranged in the rice milling chamber 10 and used for regulating and controlling the temperature in the rice milling chamber 10. Temperature control device 30 is used for regulating and controlling the indoor temperature of husk rice room 10, can carry out accurate regulation and control to the temperature in husk rice room 10, reduces the condition that grease composition condenses at low temperature in the rice bran, avoids rice screen 22 to block up, helps improving the husk rice effect.

Further, the rice milling mechanism 20 further comprises a rice screen 22 sleeved on the outer periphery of the sand roller 21, and a rice milling chamber 14 for milling rice is formed between the outer periphery of the sand roller 21 and the rice screen 22. Two inner walls of the rice milling chamber 10 which are oppositely arranged in the radial direction are respectively provided with a mounting beam 15 which extends along the length direction of the rice milling chamber 10, two ends of a rice screen 22 are respectively detachably connected with the two mounting beams 15, in the embodiment, two ends of the rice screen 22 are detachably connected with the mounting beams 15 through bolts; the rice knives 151 are arranged at one end of each mounting beam 15 facing the rice screen 22, each rice knife 151 extends into the whitening chamber 14, and the rice in the whitening chamber 14 is ground through the rice knives 151 and the sand rollers 21, so that the effect of whitening the rice is achieved.

Further, the temperature control device 30 includes a first heating device 31 disposed on the air blowing mechanism 1000, a second heating device 32 disposed at the air inlet 13, and a controller disposed on the machine body, and both the first heating device 31 and the second heating device 32 are electrically connected to the controller; the first heating device 31 is used for adjusting the air supply temperature of the air injection assembly 200, and the second heating device 32 is used for controlling the air inlet temperature of the air inlet 13. The temperature in the rice milling chamber 10 can be adjusted by the cooperation of the first heating device 31 and the second heating device 32, and rice bran is prevented from adhering to block the rice screen 22.

Specifically, a plurality of pairs of air injection port groups 120 are formed on the hollow shaft 100, the air injection port groups 120 are distributed at intervals along the axial direction of the hollow shaft 100, each pair of air injection port groups 120 includes two air injection ports 121 which are arranged oppositely in the radial direction, the air injection assemblies 200 are arranged in the air injection port groups 120 in a one-to-one correspondence manner, air injection channels 210 extending along the radial direction of the hollow shaft 100 are formed in each air injection assembly 200, and each air injection channel 210 is respectively communicated with the first air channel 11 and the second air channel 110. Further, the air injection assembly 200 includes two air injection pipes 220, an air injection channel 210 is formed in each air injection pipe 220, and an air injection port heat source 230 is disposed between every two air injection pipes 220. The air injection mechanism 1000 of the invention adopts a combined structure of the air injection pipe 220 and the hollow shaft 100, the air injection pipe 220 can ensure that the airflow sprayed by the fan 300 directly flows from the hollow shaft 100 to the air injection port 121 of the sand roller 21 so as to enter the whitening chamber 14 of the rice mill 1, thus the air outlet at the peripheral side of the sand roller 21 is more uniform, and the rice milling effect is further improved.

In the technical solution provided by the present invention, the first heating device 31 includes a plurality of air injection opening heat sources 230, and the plurality of air injection opening heat sources 230 are correspondingly arranged in each air injection passage 210 one by one. Specifically, the air injection assembly 200 includes two air injection pipes 220, an air injection channel 210 is formed in each air injection pipe 220, and an air injection port heat source 230 is disposed between every two air injection pipes 220. When the air injection heat source 230 starts to work, the air flow in the hollow shaft 100 is heated and finally flows into the whitening chamber 14 through the air injection pipe 220, so that the temperature in the whitening chamber 14 is increased, the rice milling effect is improved, and the problem of rice bran blockage is solved. An air injection channel 210 is formed in each air injection pipe 220, each air injection pipe 220 correspondingly protrudes out of the corresponding air injection opening 121, and the air injection opening heat source 230 is arranged in the hollow shaft 100.

Further, each air injection pipe 220 comprises a pipe body 221 and a fixed buckle 222 movably arranged in the pipe body 221; the fixing catch 222 comprises two catch levers 227, each catch lever 227 having a catch section 225 and a drive section 226, the catch section 225 being used to fix the blower tube 220 to the hollow shaft 100, and the drive section 226 being used to drive the catch section 225 to catch or release the hollow shaft 100. Specifically, one end of each clamping rod 227 close to the hollow shaft 100 is bent towards the outer side of the air injection pipe 220 to form a first hook 228, and the first hook 228 is correspondingly clamped at the connection position of each hollow shaft 100 and each air injection opening 121; the tube 221 is provided with a mounting hole 223, one end of the catch lever 227 away from the hollow shaft 100 is bent to form a driving rod 226a, the driving rod 226a movably penetrates through the mounting hole 223 and protrudes out of the mounting hole 223, when the driving rod 226a is away from the tube 221, the hollow shaft 100 is clamped by the first hook 228, and when the driving rod 226a is close to the tube 221, the hollow shaft 100 is released by the first hook 228.

In the technical solution provided by the present invention, a driving button 226b is formed at one end of the driving rod 226a protruding from the mounting hole 223, a spring 226c is sleeved on the driving rod 226a, one end of the spring 226c abuts against the driving button 226b, and the other end abuts against the outer wall of the tube body 221. If the blast pipe 220 needs to be disassembled, the worker presses the driving button 226b to disengage the first claw 228 of the blast pipe 220 from the inner wall of the hollow shaft 100, so that the blast pipe 220 can be disassembled from the hollow shaft 100.

In order to increase the wind force and concentrate the wind force, the inner diameter of each pipe 221 is gradually increased from the hollow shaft 100 to a direction away from the hollow shaft 100. In order to further improve the stability of the installation, the tube body 221 has supporting bases 224 formed at one end thereof adjacent to the hollow shaft 100 and distributed along the circumferential direction of the tube body 221, and the supporting bases 224 abut against the outer wall of the hollow shaft 100. The support platform 224 can increase the contact area between the air injection pipe 220 and the outer wall of the hollow shaft 100 to ensure stable support of the air injection pipe 220.

Further, each of the tuyere heat sources 230 includes: a resistor 231; the mounting frame 232 is arranged at two opposite ends of the resistor 231; and the fastening components 233 are movably arranged on the mounting frames 232 and are used for fixing two ends of the air injection port heat source 230 to the two corresponding air injection pipes 220 respectively. In the present invention, the resistor 231 is powered on to generate heat to heat the outlet air, and the resistor 231 is easy to control and has high thermal efficiency, which is a relatively economical heating method. Other heating means such as a heating wire are also possible, and the present invention is not limited thereto.

Specifically, the mounting frame 232 includes mounting rods 234 respectively disposed at both sides of the resistor 231; the latch assembly 233 includes two jaws 235 rotatably coupled to the two mounting rods 234 in a one-to-one correspondence, the two jaws 235 of each latch assembly 233 having a moving stroke away from each other and approaching each other, the two jaws 235 being configured to hold the corresponding latch 227 in the approaching stroke. It should be noted that each resistor 231 includes a snap-fit assembly 233 disposed at two ends thereof, each snap-fit assembly 233 includes two jaws 235, and the two jaws 235 can clamp the clamping rod 227 of the air injection pipe 220 when approaching each other, so as to fix the air injection heat source 230 and the air injection pipe 220.

Specifically, each claw 235 comprises a clamping end 236 and a clamping end 237 bent from the end of the clamping end 236, each clamping end 236 is rotatably connected to the corresponding mounting rod 234, and the end of each clamping end 237 is bent to form a second claw 237 a; the two corresponding clamping ends 236 are used for cooperatively clamping the clamping rod 227, and the two corresponding clamping ends 237 are used for cooperatively clamping the inner wall of the hollow shaft 100. It should be noted that a boss 122 is formed on a part of the inner peripheral wall of each air injection opening 121 and protrudes inwards, and the two second hooks 237a of each fastening component 233 are respectively and correspondingly fastened to the boss 122. Each air injection port heat source 230 achieves the effects of stable installation and convenient disassembly through double fixation with the air injection pipe 220 and the boss 122.

Further, an installation groove 234a is formed in each installation rod 234, each installation groove 234a is arranged in a penetrating manner in the width direction of the corresponding installation rod 234, and each clamping jaw 235 is movably arranged in the corresponding installation groove 234a in a penetrating manner; the middle part of each claw 235 is rotatably connected to the corresponding mounting rod 234 through a pin 238, the clamping end 236 and the clamping end 237 of each claw 235 are respectively arranged at two sides of the pin 238, a reset structure 239 is arranged between each claw 235 and each mounting rod 234, and the reset structure 239 is used for resetting the two corresponding clamping ends 236 to a mutually close state. Specifically, the return structure 239 includes a torsion spring 239 a; a mounting cavity 211 is formed in each claw 235, each torsion spring 239a is sleeved on the corresponding pin shaft 238, one end of each torsion spring 239a abuts against the inner wall of the corresponding mounting cavity 211, and the other end of each torsion spring 239a extends into the corresponding mounting groove 234a and abuts against the inner wall of the mounting groove 234 a. In order to prevent the mounting rod 234 from being damaged by the excessive stroke of the torsion spring 239a, the inner wall of each mounting groove 234a is partially protruded inward to form a stopper 234b, and one end of the torsion spring 239a extending into the mounting groove 234a abuts against the stopper 234 b. In a free state, due to the action of the torsion spring 239a, the second claw 237a of the claw 235 can be ensured to hook the boss 122, so that the fixation is realized, and an operator can detach the air injection port heat source 230 by only pulling the clamping end 236. Furthermore, in order to effectively fix the resistor 231, each mounting bracket includes a fixing ring sleeved on an end of the resistor 231, and two mounting rods 234 are integrally formed on two sides of the fixing ring, so as to effectively and stably fix the resistor 231.

In the conventional art, the outside draught fan setting that is used for the rice bran to collect of bedroom air-jet rice mill 1 is in 14 lower parts of rice whitening room, for the scheme of downdraft, so can make the rice bran of rice mill 1 lower part collect fight the rice bran dust of collecting and mix the broken rice granule, can not realize the separation of broken rice grain and rice bran automatically, must use the chaff separator to separate in addition. In the technical scheme provided by the invention, the inner cavity of the rice milling chamber 10 is in a cylindrical shape, the axial direction of the inner cavity extends along the length direction, and the axial direction of the rice milling chamber 10 extends horizontally; the air suction opening 12 is arranged at the upper end of the rice milling chamber 10, and the air inlet 13 is arranged at the lower end of the rice milling chamber 10. It should be noted that, the invention optimizes the air duct structure of the rice mill 1, adopt the upper air suction scheme, i.e. the induced draft fan used for collecting the rice bran dust is set up in the upper portion of the whitening chamber 14, because the wind speed upwards is greater than the suspension velocity of rice bran dust and smaller than the suspension velocity of broken rice granule, so can realize in the rice milling chamber 10 separate rice bran and broken rice dust directly, the lower portion of the rice milling chamber 10 has air intakes 13, the outside air will flow into the first air duct 11 of the rice milling chamber 10 from the air intake 13 because of the negative pressure environment in the rice milling chamber 10, the broken rice granule will fall out from the air intake 13; in addition, because the inner cavity of the rice milling chamber 10 in the technical scheme provided by the invention is in a cylindrical shape extending along the length direction in the axial direction, an annular air duct is formed on the inner wall of the rice milling chamber 10 and the periphery of the sand roller 21, and by the arrangement and the matching of an air suction scheme, the air flow in the rice milling machine 1 can be ensured to uniformly surround the rice screen 22, and meanwhile, the annular air duct can ensure that the direction of the internal air flow is uniformly upward, so that serious turbulence can not occur, and the collection efficiency of rice bran dust is improved.

Further, the inner wall of the rice milling chamber 10 near the air inlet 13 extends downward to form an air inlet channel 131, and the second heating device 32 includes a second resistor 321 disposed in the air inlet channel 131. The inlet air can be heated through the second resistor 321 arranged in the air inlet channel 131, and the temperature of the inlet air is ensured. Referring to the drawings, the second resistor 321 is detachably connected to two sidewalls of the air inlet channel 131, which are opposite to each other in the extending direction. In addition, since the second resistor 321 is disposed near the rice milling device of the rice milling chamber 10, in order to prevent the second resistor 321 from overheating and causing the rice to deteriorate, a heat insulation plate 322 is disposed near the air inlet 13 of the rice milling chamber 10, and the second resistor 321 is disposed at a side of the heat insulation plate 322 far away from the rice milling chamber 10. The heat insulation plate 322 can effectively insulate the heat of the second resistor 321 to the rice in the rice milling chamber 10, and in the scheme provided by the invention, the section of the heat insulation plate 322 is in a V shape, so that the influence on the wind speed of the air inlet 13 can be reduced.

In addition, the rice mill 1 further includes a plurality of temperature sensors 22a respectively disposed on the peripheral sides of the rice screens 22, and the controller is electrically connected to the plurality of temperature sensors 22a for adjusting the temperature in the whitening chamber 14 according to the temperature detection result of the temperature sensors 22 a. The temperature sensor 22a can detect the temperature of the whitening chamber 14, and adjust the heating conditions of the first heating device 31 and the second heating device 32 to prevent the rice from being deteriorated due to an excessively high temperature.

Furthermore, the top end of the machine body is provided with a feeding port 16 communicated with the whitening chamber 14, one end of the rice milling chamber 10 in the transverse direction is provided with a screw conveyor 161, the input end of the screw conveyor 161 is correspondingly positioned below the feeding port 16, and the output end of the screw conveyor 161 is sleeved on the hollow shaft 100. The untreated brown rice is fed into the whitening chamber 14 by a screw conveyor. The discharge gate 17 of intercommunication whitening chamber 14 is seted up to the one side that the fan 300 was kept away from to the organism, and material roller 171 is dialled at the horizontal other end to rice milling chamber 10, dials on hollow shaft 100 is located to the input cover of material roller 171, dials the output of material roller 171 and just sets up discharge gate 17, can send the rice through whitening to discharge gate 17 through dialling material roller 171 and discharge. Further, a plurality of first spiral grooves are formed in the circumferential side of the screw conveyor 161, the width of each first spiral groove is L1, a plurality of second spiral grooves are formed in the circumferential side of the sanding roller 21, the width of each second spiral groove is L2, a plurality of spiral grooves are formed in the circumferential side of the kick-out roller 171, the width of each third spiral groove is L3, and L1< L2< L3. It should be noted that the width of the spiral groove is gradually increased, the moving speed of the rice in the axial direction of the rice mill 1 is increased, the discharge of the rice after being milled is accelerated, and the rice milling speed is effectively improved.

In order to verify whether the design is scientific and reasonable, simulation software is used for carrying out simulation analysis on the air flow inside the rice milling chamber 10, namely an air flow velocity cloud picture, a velocity vector picture, a temperature field picture, an air pressure field schematic view inside the rice milling chamber 10 when the air spraying pipe 220 is in the horizontal position and an air flow velocity cloud picture, a velocity vector picture and a temperature field picture inside the rice milling machine 1 when the air spraying pipe is in the 45-degree inclined position. As shown in the figure, the boundary conditions are set such that the top suction speed is 6m/s, the air injection speed of the hollow shaft 100 is 10m/s, the average wind speed of the upper half part in the first air duct 11 is 6-7m/s, the average wind speed of the lower half part is 2-3m/s, the critical suspension speed of rice bran dust is 1m/s, the suspension speed of broken rice particles is 10-13m/s through preliminary experiments, therefore, the rice bran particles can be easily sucked out by the upper air suction opening 12, and the broken rice particles can fall out from the air inlet 13 along the inner wall of the rice milling chamber 10, because the designed external air duct is the narrow annular first air duct 11, the wind power around the rice screen 22 is more concentrated, and the energy consumption is lower than that of other design schemes when the same separation effect is achieved. As shown in the figure, the velocity vector diagram of the air flow in the annular first air duct 11 of the present design can be observed, the flow direction of the air flow in the velocity field of the present design is relatively consistent, no vortex and turbulence occur, and thus the rice bran particles can effectively flow out towards the top air suction opening 12.

The above description is only for the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the present invention.

Claims

1. A rice mill, comprising:

2. The rice milling machine as claimed in claim 1, wherein the rice milling mechanism further comprises a rice screen mesh sleeved on the periphery of the sand roller, and a whitening chamber for milling rice is formed between the periphery of the sand roller and the rice screen mesh;

3. The rice mill as claimed in claim 2, wherein said temperature control means comprises a first heating means provided at said air blowing mechanism, a second heating means provided at said air inlet, and a controller provided at said machine body, said controller being electrically connected to said first heating means and said second heating means for adjusting the temperature inside said rice milling chamber;

4. The rice mill of claim 3, wherein a plurality of pairs of air injection port sets are formed on the hollow shaft, the air injection port sets are distributed at intervals along the axial direction of the hollow shaft, each pair of air injection port sets comprises two air injection ports which are arranged oppositely in the radial direction, the air injection port sets are correspondingly arranged in the air injection port sets in a one-to-one correspondence manner, an air injection channel extending along the radial direction of the hollow shaft is formed in each air injection component, and each air injection channel is respectively communicated with the first air channel and the second air channel;

5. The rice mill as claimed in claim 4, wherein said air blast assembly includes two air blast pipes, said air blast passages being formed in each of said air blast pipes, and one heat source of said air blast opening being provided between each two of said air blast pipes.

6. The rice mill of claim 5 wherein each of said air jet heat sources comprises:

a first resistor;

7. The rice milling machine as claimed in claim 3, wherein said air suction opening is opened at an upper end of said rice milling chamber, said air inlet is opened at a lower end of said rice milling chamber, and said air suction opening is provided with a suction fan for driving an air flow to flow into said rice milling chamber from said air inlet and to flow out from said air suction opening;

8. The rice mill of claim 7, wherein a heat shield is disposed on a side of the rice screen adjacent to the air inlet, the heat shield extends in a transverse direction, and the second resistor is disposed on a side of the heat shield remote from the rice screen.

9. The rice mill of claim 8 wherein said heat shield comprises two spaced plates disposed in a transverse direction, said spaced plates being spaced apart from each other from bottom to top.

10. The rice mill as claimed in claim 3, wherein the first rice mill further comprises a plurality of temperature sensors disposed on a circumferential side of the rice screen, the controller being electrically connected to the plurality of temperature sensors for adjusting a temperature in the whitening chamber according to a temperature detection result of the temperature sensors.