A multi-stage grinding device for grain processing

Abstract

The present invention discloses a multi-stage grinding device for grain processing, which comprises a grinding box, the grinding box comprises a box body, a collecting bowl is installed at the bottom of the inner cavity of the box body; a first grinding mechanism, the first grinding mechanism comprises a feeder, the feeder is installed at the top of the box body, a feeding hopper connected to the feeder is installed on the top of the feeder, and a first reduction motor is installed at the center of the top of the feeding hopper. The technical problem to be solved by the present invention is that the existing multi-stage grinding device for grain processing is not convenient for efficient cooling of the multi-stage grinding units at the same time during use, which easily leads to uneven cooling of the grain material, resulting in inconsistent quality of the final ground product.

Description

Technical Field

[0001] The invention relates to the technical field of grain processing, in particular to multi-stage grinding equipment for grain processing. Background Art

[0002] Multi-stage grinding equipment for grain processing is a mechanical device specially designed to convert raw grains into flour or particles of different fineness through a series of continuous grinding steps. For grains such as wheat, corn and rice, this equipment usually contains multiple grinding units, each unit is responsible for different degrees of crushing and refinement to achieve the final required particle size and quality requirements. Multi-stage grinding can more finely control the grinding process, improve product purity and nutritional value, while improving flour extraction rate and processing efficiency.

[0003] Grinding can destroy the outer skin and cell structure of grains, making the internal starch, protein and other nutrients easier to be digested and absorbed by the human body. The grains after grinding are reduced in volume and weight, making them easier to package, store and transport over long distances. During the grain grinding process, a large amount of heat is generated, causing the temperature inside the grinding equipment to rise. High temperature may cause the heat-sensitive nutrients in the grains, such as vitamins and certain antioxidants, to degrade or be destroyed, reducing the nutritional value of the grains. In addition, excessively high temperatures can denature the protein in the grains, affecting the gluten quality and baking performance of the flour, resulting in poor texture, color and flavor of the baked goods. The high temperature generated by grinding can make it easier for the grain powder to adhere to the surface and grinding elements of the grinding equipment, causing equipment blockage, reducing grinding efficiency, and increasing the frequency of cleaning and maintenance.

[0004] During use, the existing multi-stage grinding equipment for grain processing is not convenient for efficiently cooling the multi-stage grinding units at the same time, which easily leads to uneven cooling of the grain materials and inconsistent quality of the final ground products. Summary of the invention

[0005] The technical problem to be solved by the present invention is that it is not convenient to efficiently cool the multi-stage grinding units simultaneously during the use of the existing multi-stage grinding equipment for grain processing, which easily leads to uneven cooling of the grain material and inconsistent quality of the final ground product.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a multi-stage grinding device for grain processing, comprising:

[0007] A grinding box, the grinding box comprising a box body, and a collection bowl is installed at the bottom of the inner cavity of the box body;

[0008] A first grinding mechanism, wherein the first grinding mechanism comprises a feeder, the feeder is mounted on the top of the box body, a feeding hopper connected to the feeder is mounted on the top of the feeder, and a first reduction motor is mounted at the center of the top of the feeding hopper;

[0009] A second grinding mechanism, on which a controller is installed, the second grinding mechanism comprises a material receiving box located at the middle end of the inner cavity of the box body and a grinding ring installed inside the collecting bowl, the bottom of the feeder extends to the inner cavity of the material receiving box, the inner wall of the material receiving box is rotatably connected with a first grinding roller and a second grinding roller, and a grinding head is arranged inside the grinding ring;

[0010] A liquid cooling mechanism, the liquid cooling mechanism comprising a liquid cooling jacket mounted on the surface of the box, wherein a cooling chamber is provided inside the liquid cooling jacket;

[0011] The air cooling mechanism comprises an annular circular tube, the surface of which is connected with a plurality of cooling tubes, the cooling tubes penetrate the liquid cooling jacket and are located in the inner cavity of the cooling cavity.

[0012] As a preferred embodiment of the multi-stage grinding equipment for grain processing of the present invention, an air outlet pipe is installed on the top of the box surface, a barrier net is installed inside the air outlet pipe, one end of the air outlet pipe is connected to an exhaust pipe, and a base is installed at the bottom of the box.

[0013] As a preferred solution of the multi-stage grinding equipment for grain processing described in the present invention, wherein: the output shaft of the first reduction motor is installed with a rotating drum through a coupling, the surface of the rotating drum is sleeved with spiral blades, the bottom of the rotating drum is fixedly connected with a mounting rod, the bottom of the mounting rod is fixedly connected with a conical turntable, the conical turntable is rotatably connected to the bottom of the inner wall of the feeder, and a plurality of discharge holes are opened around the bottom of the surface of the feeder.

[0014] As a preferred solution of the multi-stage grinding equipment for grain processing described in the present invention, the surface of the mounting rod is provided with a plurality of main grinding blades, the bottom of the main grinding blade is provided with an auxiliary grinding blade, and the size of the auxiliary grinding blade is smaller than the main grinding blade.

[0015] As a preferred scheme of the multi-stage grinding equipment for grain processing described in the present invention, the front ends of the first grinding roller and the second grinding roller penetrate to the front side of the box body and are rotatably connected with a mounting seat, the top of the mounting seat is fixedly connected with a fixing ring sleeved on the surface of the box body, the front side of the mounting seat is fixedly installed with a second reduction motor, the output shaft of the second reduction motor is connected to the first grinding roller, the bottom of the grinding head is connected to a steering transmission shaft, the input shaft and output shaft of the steering transmission shaft are sleeved with shaft sleeves, the shaft sleeve is fixedly connected with a special-shaped frame, the top of the special-shaped frame is fixedly connected with a fixing plate, the fixing plate is installed at the bottom of the aggregate bowl, the front end of the special-shaped frame is fixedly connected with a limiting sleeve, the limiting sleeve is rotatably connected with a rotating rod, one end of the rotating rod is connected to the input shaft of the steering transmission shaft, the other end of the rotating rod is sleeved with a driven transmission wheel, the front end of the second grinding roller is sleeved with an active transmission wheel, and the surfaces of the active transmission wheel and the driven transmission wheel are connected with a transmission belt for transmission.

[0016] As a preferred solution of the multi-stage grinding equipment for grain processing described in the present invention, the front ends of the first grinding roller and the second grinding roller are both provided with mutually meshing transmission gears, and connecting frames are installed on the left and right sides of the material receiving box, and the connecting frames are fixedly connected to the inner wall of the box.

[0017] As a preferred embodiment of the multi-stage grinding equipment for grain processing described in the present invention, the inner wall of the grinding ring is provided with a plurality of external grinding teeth, the grinding head is conical and has a plurality of internal grinding teeth on the surface that are staggered with the external grinding teeth, and the external grinding teeth and the internal grinding teeth are both annular.

[0018] As a preferred embodiment of the multi-stage grinding equipment for grain processing described in the present invention, a circulation pipe and a liquid extraction pipe connected to the cooling chamber are respectively installed on the top and bottom of the surface of the liquid cooling jacket, and a liquid cooler is installed at the opposite ends of the circulation pipe and the liquid extraction pipe. A bracket is provided on the surface of the liquid cooler, and the bracket is installed on the surface of the liquid cooling jacket. A cooling chamber is installed on the top of the inner cavity of the liquid cooling jacket, the circulation pipe is connected to the cooling chamber, and a liquid pump connected to the liquid extraction pipe is installed at the bottom of the inner cavity of the liquid cooler, and the liquid outlet end of the liquid pump passes through the inner cavity of the cooling chamber.

[0019] As a preferred embodiment of the multi-stage grinding equipment for grain processing described in the present invention, a filter is installed on the surface of the liquid cooler, ventilation holes used in conjunction with the filter are opened on the surface of the liquid cooler, a semiconductor refrigerator is installed on the surface of the cooling chamber, a cooler is installed on the cooling end of the semiconductor refrigerator, a plurality of U-shaped cooler rods located in the inner cavity of the cooling chamber are provided on one side of the cooler, a radiator is installed on the heating end of the semiconductor refrigerator, and a plurality of cooling fans are installed on one side of the radiator.

[0020] As a preferred solution of the multi-stage grinding equipment for grain processing described in the present invention, wherein: the air outlet end of the cooling pipe is connected to an annular flat tube, the bottom of the annular flat tube is connected to a plurality of connecting tubes, the bottom of the connecting tube passes through the box body and extends to the inner cavity of the material receiving box, the bottom of the connecting tube is connected to an adjustable air outlet nozzle set at an angle, the adjustable air outlet nozzle is located at the bottom around the feeder, and the surface of the annular circular tube is connected to a fan.

[0021] Beneficial effects of the present invention:

[0022] 1. The present invention can drive the drum to rotate by arranging a first reduction motor, and the grain raw materials enter the top of the inner cavity of the discharger through the feeding hopper. The drum drives the spiral blade to rotate and drive the grain raw materials to move downward. The grains are preliminarily crushed and mixed during the transportation process to prepare for subsequent grinding. After the grains are transported to the bottom of the inner cavity of the discharger, the drum drives the mounting rod to rotate, and the mounting rod drives the main grinding blade and the auxiliary grinding blade to rotate synchronously to cut and crush the grains. The size of the main grinding blade is larger than the auxiliary grinding blade, which can cut and crush the grains more effectively. The larger main grinding blade at the top can cut off larger particles first, and the smaller auxiliary grinding blade at the bottom can further crush them. Such a combined design can improve the crushing efficiency and crushing uniformity. Finally, the crushed grain particles fall into the top of the conical turntable, and the mounting rod drives the conical turntable to rotate at the bottom of the inner wall of the discharger, and the grain particles are driven to rotate by centrifugal force to throw out the grain particles, and the thrown out particles are discharged through the discharge hole into the inner cavity of the receiving box.

[0023] 2. The present invention can perform preliminary grinding on the crushed grain particles by arranging the first grinding roller and the second grinding roller. The output shaft of the second reduction motor drives the first grinding roller to rotate, and the first grinding roller drives the second grinding roller to rotate relatively through the transmission gear. When the grain passes between the first grinding roller and the second grinding roller, the grain particles are subjected to extrusion and shear force and are ground due to the relative movement of the surfaces of the first grinding roller and the second grinding roller. The surfaces of the first grinding roller and the second grinding roller are provided with anti-slip grooves, which help to better grasp and tear the grain particles during the grinding process, improve the grinding efficiency, and prevent the material from slipping during the grinding process, thereby ensuring a more stable grinding effect and initial grinding. The ground grain particles fall into the aggregate bowl at the bottom of the box body cavity and enter the grinding space between the grinding head and the grinding ring. The output shaft of the second grinding roller drives the transmission belt through the active transmission wheel, and the transmission belt drives the driven transmission wheel and the rotating rod to rotate. The rotating rod drives the steering transmission shaft to work inside the sleeve. The steering transmission shaft transmits power in a steering direction and drives the grinding head to rotate inside the grinding ring. During the rotation of the grinding head, the annular outer grinding teeth and inner grinding teeth move relative to each other to achieve fine grinding, which more thoroughly crushes the grain particles and improves the fineness and purity of the ground products. The annular layout of the outer grinding teeth and the inner grinding teeth ensures a large grinding contact area and uniform grinding effect.

[0024] 3. The present invention provides a liquid cooling mechanism, which can facilitate cooling of the grinding space at the bottom of the inner cavity of the box, prevent the temperature of the grinding environment of the grinding ring and the grinding head from being too high, effectively control the heat generated during the grinding process, and avoid the destruction of heat-sensitive nutrients in the grains due to excessive temperature, thereby maintaining the nutritional value of the grain powder. The coolant circulates inside the cooling cavity, and the flowing coolant contacts the surface of the box to absorb heat from the box. Since the box and the aggregate bowl are connected, the heat on the aggregate bowl is also conducted to the box to cool the aggregate bowl. After the aggregate bowl is cooled, the grain particles inside it absorb heat and cool, and the cooled grain particles are ground by the grinding ring and the grinding head to avoid excessive temperature during secondary grinding.

[0025] 4. The present invention is provided with an air cooling mechanism, which can facilitate cooling of the grain particles discharged from the discharge hole and the grain particles inside the receiving box. The fan draws external air and transports it to the cooling pipe through the annular circular pipe. The cooling pipe is located inside the cooling chamber. The coolant inside the cooling chamber cools the cooling pipe, and the air inside the cooling pipe absorbs the cold energy. The cooled cold air enters the adjustable air outlet through the annular flat tube and the connecting tube. The adjustable air outlet sprays cold air, and the cold air contacts the grain particles discharged from the discharge hole and the grain particles inside the receiving box to cool down the grain particles and prevent the grain particles from overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the main axonometric view of the present invention;

[0027] Figure 2 It is a bottom-up axonometric view of the present invention;

[0028] Figure 3 It is a front view cutaway axonometric drawing of the present invention;

[0029] Figure 4 It is a front and cross-sectional isometric view of the grinding box of the present invention;

[0030] Figure 5 It is a front and cross-sectional isometric view of the first grinding mechanism of the present invention;

[0031] Figure 6 It is a partial cross-sectional view of the front view of the first grinding mechanism of the present invention;

[0032] Figure 7 It is a front axonometric view of the second grinding mechanism of the present invention;

[0033] Figure 8 It is a bottom-up isometric view of the second grinding mechanism of the present invention;

[0034] Fig. 9 It is an exploded bottom view of the partial structure of the second grinding mechanism of the present invention;

[0035] Fig.10 It is a front and cross-sectional view of the grinding head, grinding ring and aggregate bowl of the present invention;

[0036] Fig.11 It is a front axonometric view of the liquid cooling mechanism of the present invention;

[0037] Fig.12 It is a left axonometric view of the liquid cooling mechanism of the present invention;

[0038] Fig.13 It is a partial cross-sectional view of the liquid cooling mechanism of the present invention from the front view;

[0039] Fig.14 This is a front axonometric view of the air cooling mechanism of the present invention.

[0040] In the figure: 100, grinding box; 101, box body; 102, barrier net; 103, air outlet pipe; 104, exhaust pipe; 105, base; 106, collecting bowl; 200, first grinding mechanism; 201, feeder; 202, hopper; 203, first reduction motor; 204, drum; 205, spiral blade; 206, main grinding blade; 207, conical turntable; 208, discharge hole; 209, mounting rod; 210, auxiliary grinding blade; 300, second grinding mechanism; 301, material receiving box; 302, fixing ring; 303, second reduction motor; 304, active transmission wheel; 305, transmission belt; 306, driven transmission wheel; 307, limit sleeve; 308, rotating rod; 309, fixing plate; 310, grinding ring; 311, grinding head; 312, connecting frame; 313, second Grinding roller; 314, first grinding roller; 315, transmission gear; 316, steering transmission shaft; 317, shaft sleeve; 318, special-shaped frame; 319, external grinding teeth; 320, internal grinding teeth; 321, mounting seat; 400, liquid cooling mechanism; 401, liquid cooling jacket; 402, circulation pipe; 403, liquid cooler; 404, filter screen; 405, liquid extraction pipe; 406, bracket; 407, cooling chamber ; 408, cooling chamber; 409, cooler; 410, U-shaped cooler rod; 411, liquid pump; 412, cooling fan; 413, radiator; 414, semiconductor refrigerator; 415, ventilation hole; 500, air cooling mechanism; 501, annular circular pipe; 502, cooling pipe; 503, adjustable air outlet; 504, connecting pipe; 505, annular flat pipe; 506, fan; 600, controller. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0042] Embodiment 1, as Figure 1-14As shown, this embodiment provides a multi-stage grinding device for grain processing, including a grinding box 100, the grinding box 100 includes a box body 101, and a collection bowl 106 is installed at the bottom of the inner cavity of the box body 101.

[0043] Furthermore, an air outlet pipe 103 is installed on the top of the box body 101 , a barrier net 102 is installed inside the air outlet pipe 103 , one end of the air outlet pipe 103 is connected to an exhaust pipe 104 , and a base 105 is installed at the bottom of the box body 101 .

[0044] The base 105 provides firm support for the bottom of the box 101. After absorbing heat, the cold air enters the top of the inner cavity of the box 101, and passes through the barrier net 102 to enter the air outlet 103. The air outlet 103 discharges the hot air from the top through the exhaust duct 104 to prevent the hot air from entering the fan 506. The barrier net 102 blocks the grain powder in the air, and the blocked powder flows through the inner wall of the box 101 to the aggregate bowl 106 for secondary grinding.

[0045] Furthermore, it also includes a first grinding mechanism 200, which includes a feeder 201, which is installed on the top of the box body 101, and a hopper 202 connected to the feeder 201 is installed on the top of the feeder 201, and a first reduction motor 203 is installed at the top center of the hopper 202.

[0046] Furthermore, the output shaft of the first reduction motor 203 is installed with a rotating drum 204 through a coupling, and a spiral blade 205 is sleeved on the surface of the rotating drum 204. A mounting rod 209 is fixedly connected to the bottom of the rotating drum 204, and a conical turntable 207 is fixedly connected to the bottom of the mounting rod 209. The conical turntable 207 is rotatably connected to the bottom of the inner wall of the feeder 201, and a plurality of discharge holes 208 are opened around the bottom of the surface of the feeder 201.

[0047] Furthermore, a plurality of main grinding blades 206 are sleeved on the surface of the mounting rod 209 , and auxiliary grinding blades 210 are mounted at the bottom of the main grinding blades 206 . The size of the auxiliary grinding blades 210 is smaller than that of the main grinding blades 206 .

[0048] By setting the first reduction motor 203, the drum 204 can be driven to rotate, and the grain raw materials enter the top of the inner cavity of the feeder 201 through the hopper 202. The drum 204 drives the spiral blade 205 to rotate and drive the grain raw materials downward. The grains are initially crushed and mixed during the transportation process to prepare for subsequent grinding. After the grains are transported to the bottom of the inner cavity of the feeder 201, the drum 204 drives the mounting rod 209 to rotate, and the mounting rod 209 drives the main grinding blade 206 and the auxiliary grinding blade 210 to rotate synchronously to cut and crush the grains. The size of the main grinding blade 206 is The auxiliary grinding blade 210 is larger than the auxiliary grinding blade 210, and can cut and crush the grains more effectively. The larger main grinding blade 206 at the top can cut off the larger particles first, and the smaller auxiliary grinding blade 210 at the bottom can further crush them. This combination design can improve the crushing efficiency and crushing uniformity. Finally, the crushed grain particles fall onto the top of the conical turntable 207, and the mounting rod 209 drives the conical turntable 207 to rotate at the bottom of the inner wall of the feeder 201, and the grain particles are driven to rotate by centrifugal force to throw out the grain particles, and the thrown out particles are discharged through the discharge hole 208 into the inner cavity of the receiving box 301.

[0049] Furthermore, it also includes a second grinding mechanism 300 , and a controller 600 is installed on the second grinding mechanism 300 .

[0050] The controller 600 controls the first polishing mechanism 200 , the second polishing mechanism 300 , the liquid cooling mechanism 400 , and the air cooling mechanism 500 .

[0051] Furthermore, the second grinding mechanism 300 includes a material receiving box 301 located at the middle end of the inner cavity of the box body 101 and a grinding ring 310 installed inside the collecting bowl 106. The bottom of the feeder 201 extends to the inner cavity of the material receiving box 301. The inner walls of the material receiving box 301 are rotatably connected to the first grinding roller 314 and the second grinding roller 313, and a grinding head 311 is provided inside the grinding ring 310.

[0052] Furthermore, the front ends of the first grinding roller 314 and the second grinding roller 313 penetrate to the front side of the box body 101 and are rotatably connected to the mounting seat 321, the top of the mounting seat 321 is fixedly connected to a fixing ring 302 sleeved on the surface of the box body 101, the front side of the mounting seat 321 is fixedly installed with a second reduction motor 303, the output shaft of the second reduction motor 303 is connected to the first grinding roller 314, the bottom of the grinding head 311 is connected to a steering transmission shaft 316, the input shaft and output shaft of the steering transmission shaft 316 are sleeved with a shaft sleeve 317, and the shaft sleeve 317 is fixedly connected to the A special-shaped frame 318 is connected, and a fixed plate 309 is fixedly connected to the top of the special-shaped frame 318, and the fixed plate 309 is installed at the bottom of the aggregate bowl 106. The front end of the special-shaped frame 318 is fixedly connected to a limiting sleeve 307, and a rotating rod 308 is rotatably connected inside the limiting sleeve 307. One end of the rotating rod 308 is connected to the input shaft of the steering transmission shaft 316, and the other end of the rotating rod 308 is sleeved with a driven transmission wheel 306. The front end of the second grinding roller 313 is sleeved with an active transmission wheel 304, and the surfaces of the active transmission wheel 304 and the driven transmission wheel 306 are connected with a transmission belt 305 for transmission.

[0053] Furthermore, the front ends of the first grinding roller 314 and the second grinding roller 313 are sleeved with mutually meshing transmission gears 315, and connecting frames 312 are installed on both sides of the left and right sides of the material receiving box 301, and the connecting frames 312 are fixedly connected to the inner wall of the box body 101.

[0054] Furthermore, the inner wall of the grinding ring 310 is provided with a plurality of external grinding teeth 319 , the grinding head 311 is conical and has a plurality of internal grinding teeth 320 staggered with the external grinding teeth 319 on its surface, and both the external grinding teeth 319 and the internal grinding teeth 320 are annular.

[0055] By setting the first grinding roller 314 and the second grinding roller 313, the crushed grain particles can be initially ground. The output shaft of the second reduction motor 303 drives the first grinding roller 314 to rotate, and the first grinding roller 314 drives the second grinding roller 313 to rotate relatively through the transmission gear 315. When the grains pass between the first grinding roller 314 and the second grinding roller 313, due to the relative movement of the surfaces of the first grinding roller 314 and the second grinding roller 313, the grain particles are squeezed and sheared and ground. The surfaces of the first grinding roller 314 and the second grinding roller 313 are provided with anti-slip grooves, which help to better grasp and tear the grain particles during the grinding process, improve the grinding efficiency, and prevent the material from slipping during the grinding process, ensuring a more stable grinding effect. The grain particles after the initial grinding fall into the collection bowl 106 at the bottom of the inner cavity of the box body 101. And enters the grinding space between the grinding head 311 and the grinding ring 310, the output shaft of the second grinding roller 313 drives the transmission belt 305 to work through the active transmission wheel 304, the transmission belt 305 drives the driven transmission wheel 306 and the rotating rod 308 to rotate, the rotating rod 308 drives the steering transmission shaft 316 to work inside the shaft sleeve 317, the steering transmission shaft 316 transmits the power in a steering direction, and drives the grinding head 311 to rotate inside the grinding ring 310. During the rotation of the grinding head 311, the annular outer grinding teeth 319 and the inner grinding teeth 320 move relative to each other to achieve fine grinding, more thoroughly crush the grain particles, and improve the fineness and purity of the ground product. The annular layout of the outer grinding teeth 319 and the inner grinding teeth 320 ensures a large grinding contact area and a uniform grinding effect. Finally, the ground grain powder is discharged through the bottom of the grinding ring 310.

[0056] Furthermore, a liquid cooling mechanism 400 is included. The liquid cooling mechanism 400 includes a liquid cooling jacket 401 installed on the surface of the box body 101 , and a cooling cavity 407 is provided inside the liquid cooling jacket 401 .

[0057] Furthermore, a circulation pipe 402 and a liquid extraction pipe 405 connected to a cooling chamber 407 are respectively installed on the top and bottom of the surface of the liquid cooling jacket 401, and a liquid cooler 403 is installed at the opposite ends of the circulation pipe 402 and the liquid extraction pipe 405. A bracket 406 is provided on the surface of the liquid cooler 403, and the bracket 406 is installed on the surface of the liquid cooling jacket 401. A cooling chamber 408 is installed on the top of the inner cavity of the liquid cooling jacket 401, and the circulation pipe 402 is connected to the cooling chamber 408. A liquid pump 411 connected to the liquid extraction pipe 405 is installed at the bottom of the inner cavity of the liquid cooler 403, and the liquid outlet end of the liquid pump 411 passes through the inner cavity of the cooling chamber 408.

[0058] Furthermore, a filter 404 is installed on the surface of the liquid cooler 403, and ventilation holes 415 used in conjunction with the filter 404 are opened on the surface of the liquid cooler 403. A semiconductor refrigerator 414 is installed on the surface of the cooling chamber 408, and a cooler 409 is installed at the cooling end of the semiconductor refrigerator 414. A plurality of U-shaped cooler rods 410 located in the inner cavity of the cooling chamber 408 are provided on one side of the cooler 409. A radiator 413 is installed at the heating end of the semiconductor refrigerator 414, and a plurality of cooling fans 412 are installed on one side of the radiator 413.

[0059] After the coolant absorbs heat inside the cooling chamber 407, the liquid pump 411 extracts the coolant after absorbing heat through the liquid extraction pipe 405 and transports it to the inner cavity of the cooling chamber 408. At this time, the semiconductor refrigerator 414 is working, and the cold end of the semiconductor refrigerator 414 is refrigerated. The cold amount is conducted to the coolant inside the cooling chamber 408 through the cooler 409 and the U-shaped cooler rod 410 to cool the coolant. After the cooled coolant fills the cooling chamber 408, it flows back to the cooling chamber 407 through the circulation pipe 402, so that the coolant inside the cooling chamber 407 can be maintained at the optimal cooling temperature. The radiator 413 and the cooling fan 412 dissipate heat from the hot end of the semiconductor refrigerator 414, and the heat is discharged to the outside air through the vents 415 and the filter 404. At the same time, the cold air from the outside enters the inner cavity of the liquid cooler 403 through the filter 404 and the vents 415 to dissipate heat to the radiator 413.

[0060] By providing a liquid cooling mechanism 400, it is possible to facilitate cooling of the grinding space at the bottom of the inner cavity of the box body 101, thereby preventing the temperature of the grinding environment of the grinding ring 310 and the grinding head 311 from being too high, effectively controlling the heat generated during the grinding process, and avoiding the destruction of heat-sensitive nutrients in the grains due to excessive temperature, thereby maintaining the nutritional value of the grain powder. The coolant circulates inside the cooling chamber 407, and the flowing coolant contacts the surface of the box body 101 to absorb heat from the box body 101. Since the box body 101 is connected to the aggregate bowl 106, the heat on the aggregate bowl 106 is also conducted to the box body 101 to cool the aggregate bowl 106. After the aggregate bowl 106 is cooled, the grain particles inside it are cooled by absorbing heat, and the cooled grain particles are ground by the grinding ring 310 and the grinding head 311 to avoid excessive temperature during secondary grinding.

[0061] Furthermore, it also includes an air cooling mechanism 500, which includes an annular circular tube 501, and a plurality of cooling tubes 502 are connected to the surface of the annular circular tube 501. The cooling tubes 502 penetrate the liquid cooling jacket 401 and are located in the inner cavity of the cooling cavity 407.

[0062] Furthermore, the air outlet end of the cooling tube 502 is connected to an annular flat tube 505, and the bottom of the annular flat tube 505 is connected to a plurality of connecting tubes 504. The bottom of the connecting tube 504 penetrates into the box body 101 and extends to the inner cavity of the receiving box 301. The bottom of the connecting tube 504 is connected to an adjustable air outlet nozzle 503 which is set obliquely. The adjustable air outlet nozzle 503 is located at the bottom around the discharger 201, and the surface of the annular circular tube 501 is connected to a fan 506.

[0063] By setting up the air cooling mechanism 500, it is convenient to cool the grain particles discharged from the discharge hole 208 and the grain particles inside the receiving box 301. The fan 506 draws external air and transports it to the cooling pipe 502 through the annular circular pipe 501. The cooling pipe 502 is located inside the cooling chamber 407. The coolant inside the cooling chamber 407 cools the cooling pipe 502. The air inside the cooling pipe 502 absorbs the cold energy. The cooled cold air enters the adjustable air outlet 503 through the annular flat tube 505 and the connecting tube 504. The adjustable air outlet 503 sprays cold air. The cold air contacts the grain particles discharged from the discharge hole 208 and the grain particles inside the receiving box 301 to cool them down and prevent the grain particles from overheating.

[0064] An electric air volume regulating valve is arranged inside the adjustable air outlet nozzle 503 to adjust the air volume of the adjustable air outlet nozzle 503 to prevent the sprayed cold air volume from being too large and blowing away the grain particles.

Claims

1. A multi-stage grinding device for grain processing, characterized in that: include, A grinding box (100), the grinding box (100) comprising a box body (101), a material collecting bowl (106) being installed at the bottom of the inner cavity of the box body (101); A first grinding mechanism (200), the first grinding mechanism (200) comprising a feeder (201), the feeder (201) being mounted on the top of the box body (101), a feeding hopper (202) being mounted on the top of the feeder (201) and being in communication with the feeder (201), and a first reduction motor (203) being mounted at the center of the top of the feeding hopper (202); A second grinding mechanism (300), wherein a controller (600) is installed on the second grinding mechanism (300), the second grinding mechanism (300) comprises a material receiving box (301) located at the middle end of the inner cavity of the box body (101) and a grinding ring (310) installed inside the collecting bowl (106), the bottom of the feeder (201) extends to the inner cavity of the material receiving box (301), the inner wall of the material receiving box (301) is rotatably connected to a first grinding roller (314) and a second grinding roller (313), and a grinding head (311) is provided inside the grinding ring (310); The front ends of the first grinding roller (314) and the second grinding roller (313) extend through the front side of the box body (101) and are rotatably connected to a mounting seat (321); a fixing ring (302) sleeved on the surface of the box body (101) is fixedly connected to the top of the mounting seat (321); a second reduction motor (303) is fixedly installed on the front side of the mounting seat (321); an output shaft of the second reduction motor (303) is connected to the first grinding roller (314); a steering transmission shaft (316) is connected to the bottom of the grinding head (311); a shaft sleeve (317) is sleeved on the input shaft and output shaft of the steering transmission shaft (316); a special-shaped frame is fixedly connected to the shaft sleeve (317); (318), the top of the special-shaped frame (318) is fixedly connected to a fixing plate (309), the fixing plate (309) is installed on the bottom of the aggregate bowl (106), the front end of the special-shaped frame (318) is fixedly connected to a limiting sleeve (307), the limiting sleeve (307) is rotatably connected to a rotating rod (308) inside, one end of the rotating rod (308) is connected to the input shaft of the steering transmission shaft (316), the other end of the rotating rod (308) is sleeved with a driven transmission wheel (306), the front end of the second grinding roller (313) is sleeved with an active transmission wheel (304), and the surfaces of the active transmission wheel (304) and the driven transmission wheel (306) are connected to each other with a transmission belt (305); The front ends of the first grinding roller (314) and the second grinding roller (313) are sleeved with mutually meshing transmission gears (315); the left and right sides of the material receiving box (301) are both provided with connecting frames (312); the connecting frames (312) are fixedly connected to the inner wall of the box body (101); The inner wall of the grinding ring (310) is provided with a plurality of external grinding teeth (319); the grinding head (311) is conical and has a surface provided with a plurality of internal grinding teeth (320) that are staggered with the external grinding teeth (319); the external grinding teeth (319) and the internal grinding teeth (320) are both annular; A liquid cooling mechanism (400), the liquid cooling mechanism (400) comprising a liquid cooling jacket (401) installed on the surface of the box body (101), the liquid cooling jacket (401) being provided with a cooling cavity (407) inside; A circulation pipe (402) and a liquid extraction pipe (405) connected to a cooling chamber (407) are respectively installed at the top and bottom of the surface of the liquid cooling jacket (401); a liquid cooler (403) is installed at opposite ends of the circulation pipe (402) and the liquid extraction pipe (405); a bracket (406) is provided on the surface of the liquid cooler (403); the bracket (406) is installed on the surface of the liquid cooling jacket (401); a cooling chamber (408) is installed at the top of the inner cavity of the liquid cooling jacket (401); the circulation pipe (402) is connected to the cooling chamber (408); a liquid pump (411) connected to the liquid extraction pipe (405) is installed at the bottom of the inner cavity of the liquid cooler (403); and a liquid outlet end of the liquid pump (411) penetrates into the inner cavity of the cooling chamber (408); A filter (404) is installed on the surface of the liquid cooler (403), and a ventilation hole (415) used in conjunction with the filter (404) is opened on the surface of the liquid cooler (403); a semiconductor refrigerator (414) is installed on the surface of the cooling chamber (408); a cooling conductor (409) is installed at the cooling end of the semiconductor refrigerator (414), and a plurality of U-shaped cooling rods (410) located in the inner cavity of the cooling chamber (408) are provided on one side of the cooling conductor (409); a radiator (413) is installed at the heating end of the semiconductor refrigerator (414), and a plurality of cooling fans (412) are installed on one side of the radiator (413); An air cooling mechanism (500), the air cooling mechanism (500) comprising an annular circular tube (501), a surface of the annular circular tube (501) being connected to a plurality of cooling tubes (502), the cooling tubes (502) penetrating the liquid cooling jacket (401) and being located in the inner cavity of the cooling cavity (407); The air outlet end of the cooling tube (502) is connected to an annular flat tube (505), the bottom of the annular flat tube (505) is connected to a plurality of connecting tubes (504), the bottom of the connecting tube (504) penetrates into the box body (101) and extends to the inner cavity of the material receiving box (301), the bottom of the connecting tube (504) is connected to an adjustable air outlet nozzle (503) arranged obliquely, the adjustable air outlet nozzle (503) is located at the bottom around the feeder (201), and the surface of the annular circular tube (501) is connected to a fan (506).

2. The multi-stage grinding equipment for grain processing according to claim 1, characterized in that: An air outlet pipe (103) is installed on the top of the surface of the box body (101), a barrier net (102) is installed inside the air outlet pipe (103), one end of the air outlet pipe (103) is connected to an exhaust pipe (104), and a base (105) is installed at the bottom of the box body (101).

3. The multi-stage grinding equipment for grain processing according to claim 1, characterized in that: The output shaft of the first reduction motor (203) is mounted with a rotating drum (204) via a coupling, the surface of the rotating drum (204) is sleeved with spiral blades (205), the bottom of the rotating drum (204) is fixedly connected with a mounting rod (209), the bottom of the mounting rod (209) is fixedly connected with a conical turntable (207), the conical turntable (207) is rotatably connected to the bottom of the inner wall of the discharger (201), and a plurality of discharge holes (208) are arranged around the bottom of the surface of the discharger (201).

4. The multi-stage grinding equipment for grain processing according to claim 3, characterized in that: A plurality of main grinding blades (206) are sleeved on the surface of the mounting rod (209), and a secondary grinding blade (210) is mounted on the bottom of the main grinding blade (206). The secondary grinding blade (210) is smaller in size than the main grinding blade (206).

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