CN110756274B

CN110756274B - Flour grinding machine

Info

Publication number: CN110756274B
Application number: CN201911055910.9A
Authority: CN
Inventors: 不公告发明人
Original assignee: Nanning Jinjiang Fuyuan Food Co ltd
Current assignee: Nanning Jinjiang Fuyuan Food Co.,Ltd.
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2021-11-16
Anticipated expiration: 2039-10-31
Also published as: CN110756274A

Abstract

The invention belongs to the technical field of grinding machines, and particularly relates to a flour grinding machine which comprises a machine body, wherein a flour hopper is arranged at the upper part of the machine body; a black bean bin is fixedly connected above the flour hopper through a support, a discharging pipe is communicated with the bottom of the black bean bin, and a first switch for opening the discharging pipe is arranged in the middle of the discharging pipe; a pair of gears is arranged between the black bean bin and the flour hopper, a rotating shaft of each gear is rotationally connected with the flour hopper, one gear is driven by a speed reducing motor, and the speed reducing motor is connected with a power supply through a controller; a grinding cavity is communicated with the lower part of the flour hopper through a pipeline, and a second switch for opening or closing the pipeline is arranged on the pipeline; a pair of rollers is rotatably connected in the grinding cavity; according to the invention, the black beans are crushed by the black bean bin arranged above the flour hopper and the gear, so that the steps of independently grinding the black beans into powder and mixing the black bean powder and the flour are reduced, production equipment is saved, and the production efficiency of the high-calcium nutritional flour is improved.

Description

Flour grinding machine

Technical Field

The invention belongs to the technical field of grinding machines, and particularly relates to a flour grinding machine.

Background

Flour is a flour ground from wheat and is the staple food in most northern regions of china. The flour can be made into various foods with various patterns and different flavors, and is one of the main foods loved by Chinese people. At present, along with the improvement of quality of domestic water and diet and the enhancement of health care consciousness, people have deepened the concept of health preservation, and staple food with health care function is more and more popular with people. The pure flour cannot meet the requirements of people on the enthusiasm of diet and health preservation, the flour in the current market is mainly wheat flour, the heat is low, the nutrient elements cannot meet the requirements of people, the black beans are added into the flour, the calcium content of the flour can be increased, the black bean powder adding process is complex, large production investment is needed, and meanwhile, the grinding effect on the black beans is poor, so that the technical scheme is limited.

Disclosure of Invention

In order to make up for the defects of the prior art and solve the problems that flour in the market at present is mainly wheat flour, the heat is low, the nutrient elements cannot meet the requirements of people, the calcium content of the flour can be increased by adding black beans into the flour, but the process of adding black bean powder is complex, and the grinding effect on the black beans is poor, the flour grinding machine provided by the invention is used for grinding the flour.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a flour grinder which comprises a grinder body, wherein a flour hopper for containing coarse grinding flour is arranged at the upper part of the grinder body; a black bean bin is fixedly connected above the flour hopper through a support, a discharging pipe is communicated with the bottom of the black bean bin, and a first switch for opening the discharging pipe is arranged in the middle of the discharging pipe; a first chamber is formed in the black bean bin body, and an air inlet and an air outlet are formed in the outer side of the black bean bin; one end of the gas inlet is connected with the liquid nitrogen tank, one end of the gas outlet is connected with the cooling tank, the cooling tank is communicated with the liquid nitrogen tank, and the liquid nitrogen entering the first chamber is always kept at a critical value through the mutual communication among the liquid nitrogen tank, the first chamber and the cooling tank, so that the black beans in the black bean bin are frozen; a pair of gears is arranged between the black bean bin and the flour hopper, a rotating shaft of each gear is rotationally connected with the flour hopper, one gear is driven by a speed reducing motor, and the speed reducing motor is connected with a power supply through a controller; a grinding cavity is communicated with the lower part of the flour hopper through a pipeline, and a second switch for opening or closing the pipeline is arranged on the pipeline; a pair of rollers are rotatably connected in the grinding cavity, the rotating directions of the two rollers are opposite, and the rotating speeds of the two rollers are different; the black beans are crushed by the gear and ground together with the coarse grinding flour, so that the procedure of grinding the black beans is reduced, the production cost is saved, and the production efficiency of the high-calcium nutritional flour is improved; when the flour is used, the flour after coarse grinding is put into a flour hopper, black beans are put into a black bean bin, and then a speed reducing motor is started through a controller and drives a gear to rotate; due to the action of the first switch, the black beans are concentrated in the black bean bin, and meanwhile, the liquid nitrogen in the liquid nitrogen tank is introduced into the first chamber by controlling the liquid nitrogen tank through the controller, so that the black beans concentrated in the black bean bin are frozen; meanwhile, the cooling tank, the liquid nitrogen tank and the first chamber are communicated with each other, so that the liquid nitrogen is always kept at a critical value, the black beans are frozen to the maximum extent, and the subsequent grinding of the black beans is facilitated; later turn on the switch, make the black bean in the black bean storehouse flow into between two gears behind the unloading pipe, the black bean falls into the flour fill after the extrusion of gear is smashed, later turn on No. two switches, make the kibbling flour in the flour fill fall between two running rollers through the pipeline with the black bean after smashing together, later the running roller is rotatory to form the mixture of flour and black bean powder after grinding kibbling flour and the black bean after smashing together, the black bean storehouse cooperation gear through arranging in flour fill top is to the breakage of black bean, the step that the black bean ground into powder alone and black bean powder and flour mix has been reduced, save production facility, and the production cost is saved, and the production efficiency of high-calcium nutrition flour is improved.

Preferably, a screen which is obliquely arranged is arranged below the gear and is fixedly connected with the flour hopper through a support; a material returning hopper is arranged below the lower end of the screen, the material returning hopper is communicated with an upper vacuum material lifting machine, and a discharge port of the vacuum material lifting machine is positioned right above the black bean bin; the black beans which are not completely crushed are conveyed back to the black bean bin for re-grinding through the matching of the screen and the vacuum material lifting machine, so that the working efficiency of the flour mill is further increased, and the production efficiency of the high-calcium nutritional flour is further improved; filter the black bean after the breakage through the screen cloth, reduce the black bean of not complete breakage and get into the flour fill, influence the grinding efficiency of flour, screen cloth cooperation feed back fill and vacuum material lifting machine simultaneously will not send into the black bean storehouse again after the black bean of complete breakage is collected and continue the breakage, further increase the breakage rate of black bean to further improve the production efficiency of high calcium nutrition flour.

Preferably, a funnel is arranged below the screen, the funnel is fixedly connected with the flour hopper through a support, a guide pipe at the lower part of the funnel extends into the flour in the flour hopper, the bottom end of the guide pipe is positioned near the top of the pipeline, the crushed black beans are conveyed to the pipeline through the funnel and are mixed, and then the mixture is ground through a roller, so that the mixing uniformity of the flour and the black beans is further improved, and the production efficiency of the high-calcium nutritional flour is further improved; through funnel cooperation pipe, send into near the pipeline top with the black bean after the breakage for the broken black bean grinds through the running roller after with the corase grind flour intensive mixing, further increases the mixed degree of consistency of broken black bean and corase grind flour, thereby further improves the production efficiency of high calcium nutrition flour.

Preferably, a group of air ducts are uniformly distributed in the roller along the circumference of the axial direction of the roller, a third hole is formed in a rotating shaft of the roller, one end of the third hole is communicated with the air ducts, and the other end of the third hole is communicated with a compressed air source through an air valve; the temperature rise of the roller is reduced through the cooling air introduced into the third hole and the air duct, so that the damage of high temperature to protein is reduced, the nutrition loss of flour is reduced, and the production efficiency of the high-calcium nutritional flour is further improved; through the cooperation between No. three holes and the wind channel, when opening the pneumatic valve, compressed air flows through the wind channel through No. three holes, take away the heat of running roller the back discharge running roller outside, reduce the rise of running roller temperature, reduce the high temperature that the running roller produced and to the destruction of flour and black bean in protein, reduce and guarantee that flour and black bean nutrient composition run off, reduce simultaneously flour and smash the in-process adhesion on the running roller surface, influence the grinding efficiency of running roller, and then further improve the production efficiency of high calcium nutrition flour.

Preferably, a group of spray holes are uniformly formed in the surface of the roller, the spray holes are communicated with the air duct, and the axes of the spray holes and the axes of the air duct form an included angle of 135 degrees; compressed air is sprayed out of the spray holes to reduce flour adhesion of the rollers, so that the grinding efficiency of the rollers is further improved, and the production efficiency of the high-calcium nutritional flour is further improved; compressed air in the air duct is sprayed out through the spray holes, so that flour is further reduced to be adhered to the surface of the roller, the grinding efficiency of the roller is further increased, meanwhile, the included angle of 135 degrees is formed between the axis of the spray holes and the axis of the air duct, the probability that the spray holes are blocked is reduced, the cleaning efficiency of the spray holes on the surface of the roller is further increased, and the production efficiency of the high-calcium nutritious flour is further improved.

Preferably, a group of annular grooves are uniformly formed in the periphery of the gears, and the annular grooves in the two gears are arranged in a staggered manner, so that the shearing effect on the black beans when the two gears are meshed with each other is increased, and the production efficiency of the high-calcium nutritional flour is further improved; through the ring channel of staggered arrangement on two gears for the black bean is when the gear is broken, increases the shearing action of gear to the black bean, and the crushing effect and the crushing efficiency of black bean are further increased to the extrusion effect of cooperation gear to the black bean, further improve the production efficiency of high calcium nutrition flour.

Preferably, each gear is provided with a group of air nozzles, a rotating shaft of each gear is a hollow shaft, and one end of the rotating shaft of each gear penetrates through the flour hopper and is connected with the hot air tank; hot air in the hot air tank is sprayed out from the air spraying port, so that the grinding of the black beans is assisted, and the gears can be cleaned; through the design, on one hand, hot air is sprayed out from the air spraying port, so that powdery substances generated by grinding the black beans by the two gears fall off the two gears, and the influence on the grinding operation of the black beans by the two gears in the later period due to the powdery substances left in the two gears is avoided; on the other hand, because the black beans are frozen in the black bean bin, the black beans are sprayed out from the air nozzle through hot air, the cold and hot alternation of the black beans is realized, the grinding of the black beans is accelerated, and the grinding effect of the black beans is improved.

The invention has the following beneficial effects:

1. according to the flour grinder, liquid nitrogen in the liquid nitrogen tank is introduced into the first cavity, the black beans in the black bean bin are frozen, meanwhile, hot gas is sprayed out of the gas nozzles on the gears during grinding of the black beans through the two gears, cold and hot alternation of the black beans is achieved, crushing of the black beans is accelerated, and the grinding effect of the black beans is improved.

2. According to the flour grinder, the black beans are crushed by the black bean bin arranged above the flour hopper and the gear, so that the steps of independently grinding the black beans into powder and mixing the black bean powder and the flour are reduced, production equipment is saved, the production cost is saved, and the production efficiency of the high-calcium nutritional flour is improved.

3. According to the flour grinder, the broken black beans are conveyed to the position near the top of the pipeline by the funnel matched with the guide pipe, so that the broken black beans and the coarse grinding flour are fully mixed and then are ground by the roller, the mixing uniformity of the broken black beans and the coarse grinding flour is further improved, and the production efficiency of the high-calcium nutritional flour is further improved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a cross-sectional view of the present invention;

FIG. 2 is a partial cross-sectional view of a roller in the present invention;

FIG. 3 is a structural view of a gear in the present invention;

in the figure: the machine body 1, the flour hopper 11, the black bean bin 12, the first chamber 121, the air inlet 122, the air outlet 123, the blanking pipe 13, the first switch 14, the gear 15, the air jet 151, the pipeline 16, the grinding cavity 17, the second switch 18, the roller 19, the screen 2, the material returning hopper 21, the vacuum material lifting machine 22, the funnel 23, the conduit 24, the air duct 25, the third hole 26, the spray holes 27 and the annular groove 28.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 3, the flour mill of the present invention comprises a machine body 1, wherein a flour hopper 11 for containing coarse grinding flour is arranged at the upper part of the machine body 1; a black bean bin 12 is fixedly connected above the flour hopper 11 through a support, the bottom of the black bean bin 12 is communicated with a discharging pipe 13, and a first switch 14 for opening the discharging pipe 13 is arranged in the middle of the discharging pipe 13; a first cavity 121 is formed in the black bean bin 12, and an air inlet 122 and an air outlet 123 are formed in the outer side of the black bean bin 12; one end of the gas inlet 122 is connected with the liquid nitrogen tank, one end of the gas outlet 123 is connected with the cooling tank, the cooling tank is communicated with the liquid nitrogen tank, and the liquid nitrogen entering the first chamber 121 is always kept at a critical value through the mutual communication among the liquid nitrogen tank 124, the first chamber 121 and the cooling tank, so that the black beans in the black bean bin 12 are frozen; a pair of gears 15 is arranged between the black bean bin 12 and the flour hopper 11, a rotating shaft of each gear 15 is rotatably connected with the flour hopper 11, one gear 15 is driven by a speed reducing motor, and the speed reducing motor is connected with a power supply through a controller; a grinding cavity 17 is communicated below the flour hopper 11 through a pipeline 16, and a second switch 18 for opening or closing the pipeline 16 is arranged on the pipeline 16; a pair of rollers 19 is rotatably connected in the grinding cavity 17, the rotating directions of the two rollers 19 are opposite, and the rotating speeds of the two rollers 19 are different; the black beans are crushed by the gear 15 and then ground together with the coarse grinding flour, so that the procedures of grinding the black beans are reduced, the production cost is saved, and the production efficiency of the high-calcium nutritional flour is improved; when the flour processing device is used, the flour after coarse grinding is put into the flour hopper 11, the black beans are put into the black bean bin 12, then the speed reducing motor is started through the controller, and the speed reducing motor drives the gear 15 to rotate; due to the action of the first switch 14, the black beans are concentrated in the black bean bin 12, and meanwhile, the liquid nitrogen in the liquid nitrogen tank is introduced into the first chamber 121 by controlling the liquid nitrogen tank through the controller, so that the black beans concentrated in the black bean bin 12 are frozen; meanwhile, the cooling tank, the liquid nitrogen tank and the first chamber 121 are communicated with each other, so that the liquid nitrogen is always kept at a critical value, the black beans are frozen to the maximum extent, and the subsequent grinding of the black beans is facilitated; then, a first switch 14 is turned on, so that the black beans in the black bean bin 12 flow between two gears 15 after passing through a blanking pipe 13, the black beans fall into a flour hopper 11 after being extruded and crushed by the gears 15, a second switch 18 is turned on, the coarse grinding flour in the flour hopper 11 and the crushed black beans fall between two rollers 19 through a pipeline 16, then the rollers 19 rotate to grind the coarse grinding flour and the crushed black beans together to form a mixture of flour and black bean powder, the black beans are crushed by the black bean bin 12 arranged above the flour hopper 11 in cooperation with the gears 15, the steps of independently grinding the black beans into powder and mixing the black bean powder and the flour are reduced, production equipment is saved, production cost is saved, and production efficiency of the high-calcium nutritional flour is improved.

As an embodiment of the invention, a screen 2 which is obliquely arranged is arranged below the gear 15, and the screen 2 is fixedly connected with the flour hopper 11 through a bracket; a material returning hopper 21 is arranged below the lower end of the screen 2, the material returning hopper 21 is communicated with an upper vacuum material lifting machine 22, and a discharge port of the vacuum material lifting machine 22 is positioned right above the black bean bin 12; through the matching of the screen 2 and the vacuum material lifting machine 22, the black beans which are not completely crushed are conveyed back to the black bean bin 12 to be ground again, so that the working efficiency of the flour mill is further increased, and the production efficiency of the high-calcium nutritional flour is further improved; filter the black bean after the breakage through screen cloth 2, reduce the not complete broken black bean and get into flour hopper 11, influence the grinding efficiency of flour, screen cloth 2 cooperation feed back hopper 21 and vacuum material lifting machine 22 simultaneously will not complete broken black bean and collect the back and send into the black bean storehouse 12 again and continue the breakage, further increase the breakage rate of black bean to further improve the production efficiency of high calcium nutrition flour.

As an embodiment of the invention, a funnel 23 is arranged below the screen 2, the funnel 23 is fixedly connected with the flour hopper 11 through a bracket, a guide pipe 24 arranged at the lower part of the funnel 23 extends into the flour in the flour hopper 11, the bottom end of the guide pipe 24 is positioned near the top of the pipeline 16, the crushed black beans are conveyed to the pipeline 16 through the funnel 23 to be mixed and then are ground through a roller 19, the mixing uniformity of the flour and the black beans is further improved, and the production efficiency of the high-calcium nutritional flour is further improved; through funnel 23 cooperation pipe 24, send into near pipeline 16 top with the black bean after the breakage for grind through running roller 19 again after broken black bean and the coarse grinding flour intensive mixing, further increase the mixed degree of consistency of broken black bean and coarse grinding flour, thereby further improve the production efficiency of high calcium nutrition flour.

As an embodiment of the invention, a group of air ducts 25 are uniformly distributed in the roller 19 along the axial direction of the roller 19, a third hole 26 is formed in a rotating shaft of the roller 19, one end of the third hole 26 is communicated with the air ducts 25, and the other end is communicated with a compressed air source through an air valve; the temperature rise of the roller 19 is reduced through the cooling air introduced into the third hole 26 and the air duct 25, so that the damage of high temperature to protein is reduced, the nutrition loss of flour is reduced, and the production efficiency of the high-calcium nutritional flour is further improved; through the cooperation between No. three hole 26 and the wind channel 25, when opening the pneumatic valve, compressed air is through No. three hole 26 wind channel 25 of flowing through, it is outside to take away the back discharge running roller 19 with the heat of running roller 19, reduce the rise of running roller 19 temperature, reduce the high temperature that running roller 19 produced and to the destruction of flour and black bean in protein, reduce and guarantee that flour and black bean nutrient composition run off, reduce flour simultaneously and at 19 surfaces of the running roller 19 of crushing in-process adhesion, influence the grinding efficiency of running roller 19, and then further improve the production efficiency of high calcium nutrition flour.

As an embodiment of the invention, a group of spray holes 27 are uniformly formed on the surface of the roller 19, the spray holes 27 are communicated with the air duct 25, and the axes of the spray holes 27 and the axes of the air duct 25 form an included angle of 135 degrees; compressed air is sprayed out of the spray holes 27 to reduce flour adhesion of the roller 19, so that the grinding efficiency of the roller 19 is further improved, and the production efficiency of the high-calcium nutritional flour is further improved; compressed air in the air duct 25 is sprayed out through the spray holes 27, so that flour is further prevented from adhering to the surfaces of the rollers 19, the grinding efficiency of the rollers 19 is further improved, meanwhile, the included angle of 135 degrees is formed between the axis of the spray holes 27 and the axis of the air duct 25, the probability that the spray holes 27 are blocked is reduced, the cleaning efficiency of the spray holes 27 on the surfaces of the rollers 19 is further improved, and the production efficiency of the high-calcium nutritional flour is further improved.

As an embodiment of the invention, a group of annular grooves 28 are uniformly formed on the periphery of the gears 15, and the annular grooves 28 on the two gears 15 are arranged in a staggered manner, so that the shearing action on the black beans when the two gears 15 are meshed with each other is increased, and the production efficiency of the high-calcium nutritional flour is further improved; through the ring channel 28 of staggered arrangement on two gears 15 for the black bean is when the gear 15 is broken, increases the shearing action of gear 15 to the black bean, and the crushing effect and the crushing efficiency of black bean are further increased to the extrusion effect of cooperation gear 15 to the black bean, further improve the production efficiency of high calcium nutrition flour.

As an embodiment of the present invention, each gear 15 is provided with a set of air nozzles 151, and the rotating shaft of the gear 15 is a hollow shaft, and one end of the rotating shaft of the gear 15 penetrates through the flour hopper 11 and is connected to the hot air tank; hot air in the hot air tank is sprayed out from the air spraying port 151, so that the grinding of the black beans is assisted, and the gears can be cleaned; through the design, on one hand, hot air is sprayed out from the air spraying port 151, so that the powdery substances generated by the grinding of the black beans by the two gears 15 fall off the two gears 15, and the influence on the grinding operation of the black beans by the two gears 15 in the later period due to the powdery substances left in the two gears 15 is avoided; on the other hand, because the black beans are frozen in the black bean bin 12, hot air is sprayed out from the air nozzle 151, so that the cold and hot alternation of the black beans is realized, the grinding of the black beans is accelerated, and the grinding effect of the black beans is improved.

When the flour freezing device is used, flour after coarse grinding is placed into the flour hopper 11, black beans are placed into the black bean bin 12, then the speed reducing motor is started through the controller, the speed reducing motor drives the gear 15 to rotate, the black beans are concentrated in the black bean bin 12 under the action of the first switch 14, and meanwhile, the liquid nitrogen in the liquid nitrogen tank is introduced into the first cavity 121 through the controller, so that the black beans concentrated in the black bean bin 12 are frozen; meanwhile, the cooling tank, the liquid nitrogen tank and the first chamber 121 are communicated with each other, so that the liquid nitrogen is always kept at a critical value, the black beans are frozen to the maximum extent, and the subsequent grinding of the black beans is facilitated; then, a first switch 14 is turned on, so that the black beans in the black bean bin 12 flow between two gears 15 after passing through a blanking pipe 13, the black beans fall into a flour hopper 11 after being extruded and crushed by the gears 15, a second switch 18 is turned on, the coarse grinding flour in the flour hopper 11 and the crushed black beans fall between two rollers 19 through a pipeline 16, then the rollers 19 rotate to grind the coarse grinding flour and the crushed black beans together to form a mixture of flour and black bean powder, the black beans are crushed by the black bean bin 12 arranged above the flour hopper 11 in cooperation with the gears 15, the steps of independently grinding the black beans into powder and mixing the black bean powder and the flour are reduced, production equipment is saved, production cost is saved, and production efficiency of the high-calcium nutritional flour is improved; the crushed black beans are filtered through the screen 2, the phenomenon that the incompletely crushed black beans enter the flour hopper 11 to affect the grinding efficiency of flour is reduced, meanwhile, the screen 2 is matched with the material returning hopper 21 and the vacuum material lifting machine 22, the incompletely crushed black beans are collected and then are sent into the black bean bin 12 again to be continuously crushed, the crushing rate of the black beans is further increased, and the production efficiency of the high-calcium nutritional flour is further improved; the crushed black beans are conveyed to the position near the top of the pipeline 16 through the hopper 23 and the guide pipe 24, so that the crushed black beans and the coarse grinding flour are fully mixed and then are ground through the roller 19, the mixing uniformity of the crushed black beans and the coarse grinding flour is further increased, and the production efficiency of the high-calcium nutritional flour is further improved; through the cooperation between the third hole 26 and the air duct 25, when the air valve is opened, compressed air flows through the air duct 25 through the third hole 26, the heat of the roller 19 is taken away and then is discharged out of the roller 19, the temperature rise of the roller 19 is reduced, the damage of high temperature generated by the roller 19 to protein in flour and black beans is reduced, the loss of nutritional ingredients of the flour and the black beans is reduced and ensured, meanwhile, the flour is prevented from being adhered to the surface of the roller 19 in the crushing process, the grinding efficiency of the roller 19 is influenced, and the production efficiency of the high-calcium nutritional flour is further improved; compressed air in the air duct 25 is sprayed out through the spray holes 27, so that flour is further prevented from adhering to the surfaces of the rollers 19, the grinding efficiency of the rollers 19 is further improved, meanwhile, the included angle of 135 degrees is formed between the axes of the spray holes 27 and the axes of the air duct 25, the probability that the spray holes 27 are blocked is reduced, the cleaning efficiency of the spray holes 27 on the surfaces of the rollers 19 is further improved, and the production efficiency of the high-calcium nutritional flour is further improved; through the ring channel 28 of staggered arrangement on two gears 15 for the black bean is when the gear 15 is broken, increases the shearing action of gear 15 to the black bean, and the crushing effect and the crushing efficiency of black bean are further increased to the extrusion effect of cooperation gear 15 to the black bean, further improve the production efficiency of high calcium nutrition flour.

The front, the back, the left, the right, the upper and the lower are all based on figure 1 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A flour mill is characterized in that: comprises a machine body (1), wherein the upper part of the machine body (1) is provided with a flour hopper (11) for containing coarse grinding flour; a black bean bin (12) is fixedly connected above the flour hopper (11) through a support, the bottom of the black bean bin (12) is communicated with a discharging pipe (13), and the middle part of the discharging pipe (13) is provided with a first switch (14) for opening the discharging pipe (13); a first chamber (121) is formed in the black bean bin body of the black bean bin (12), and an air inlet (122) and an air outlet (123) are formed in the outer side of the black bean bin (12); one end of the air inlet (122) is connected with the liquid nitrogen tank, one end of the air outlet (123) is connected with the cooling tank, the cooling tank is communicated with the liquid nitrogen tank, and the liquid nitrogen entering the first chamber (121) is always kept at a critical value through the mutual communication among the liquid nitrogen tank, the first chamber and the cooling tank, so that the black beans in the black bean bin (12) are frozen; a pair of gears (15) is arranged between the black bean bin (12) and the flour hopper (11), a rotating shaft of each gear (15) is rotatably connected with the flour hopper (11), one gear (15) is driven by a speed reducing motor, and the speed reducing motor is connected with a power supply through a controller; a grinding cavity (17) is communicated with the lower part of the flour hopper (11) through a pipeline (16), and a second switch (18) for opening or closing the pipeline (16) is arranged on the pipeline (16); a pair of rollers (19) is rotatably connected in the grinding cavity (17), the rotating directions of the two rollers (19) are opposite, and the rotating speeds of the two rollers (19) are different; a screen (2) which is obliquely arranged is arranged below the gear (15), and the screen (2) is fixedly connected with the flour hopper (11) through a bracket; a material returning hopper (21) is arranged below the lower end of the screen (2), the material returning hopper (21) is communicated with an upper vacuum material lifting machine (22), and a discharge port of the vacuum material lifting machine (22) is positioned right above the black bean bin (12); the black beans which are not completely crushed are conveyed back to the black bean bin (12) for re-grinding through the matching of the screen (2) and the vacuum material lifting machine (22); each gear (15) is provided with a group of air nozzles (151), the rotating shaft of the gear (15) is a hollow shaft, and one end of the rotating shaft of the gear (15) penetrates through the flour hopper (11) and is connected with the hot air tank.

2. A flour mill according to claim 1, characterized in that: the utility model discloses a flour mill, including screen cloth (2), screen cloth (2) below is equipped with funnel (23), and funnel (23) link firmly with flour fill (11) through the support, and during pipe (24) of funnel (23) lower part stretched into the flour in flour fill (11), and near the bottom of pipe (24) was located pipeline (16) top, ground through running roller (19) after carrying out the mixture with broken black bean to pipeline (16) department through funnel (23).

3. A flour mill according to claim 2, characterized in that: a group of air ducts (25) are uniformly distributed in the roller (19) along the axial direction of the roller (19) along the circumference, a third hole (26) is formed in a rotating shaft of the roller (19), one end of the third hole (26) is communicated with the air ducts (25), and the other end of the third hole is communicated with a compressed air source through an air valve; the temperature rise of the roller (19) is reduced by the cooling air introduced into the third hole (26) and the air duct (25).

4. A flour mill according to claim 3, characterized in that: a group of spray holes (27) are uniformly formed in the surface of the roller (19), the spray holes (27) are communicated with the air duct (25), and the axes of the spray holes (27) and the axes of the air duct (25) form an included angle of 135 degrees.

5. A flour mill according to claim 1, characterized in that: a set of ring channels (28) have evenly been seted up to gear (15) periphery, and ring channels (28) on two gears (15) are staggered, increase the shearing action to the black bean when two gears (15) intermeshing.