Millet flour grinding device

Abstract

The invention relates to the technical field of millet flour grinding, in particular to a millet flour grinding device which comprises a machine body used for installing a smashing roller driven by a motor to rotate, a guide cover arranged in the lower end of the machine body and matched with the smashing roller to work, and a flour collecting box arranged in the lower end of the machine body in a sliding mode and provided with a detection assembly. The connecting hopper is installed at the bottom end of the guide cover, and a connecting assembly used for connecting the connecting hopper with the powder collecting box is arranged between the connecting hopper and the powder collecting box. The spiral cooling pipe is arranged in the crushing roller, whether the circulating water pump needs to be started or not is judged through the temperature and humidity sensor, the circulating water pump is started when the temperature of the crushing roller is too high due to friction influence, heat of the crushing roller is taken away through flowing of cooling liquid, and therefore millet flour is prevented from being heated and gelatinized; cooling liquid in the water tank is cooled through the semiconductor chilling plate and the cooling fan, so that the cooling effect of the cooling liquid is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of millet flour grinding, in particular to a millet flour grinding device. Background Art

[0002] Millet flour is made from millet that has been carefully processed, and a mechanical grinder is usually used to grind millet into powder.

[0003] The existing millet milling machine has the following defects in actual use: During the millet flour production process, when the millet flour mill needs to operate continuously, the friction heat generated by the mill causes the temperature of the grinding roller to rise, causing the millet flour to gelatinize due to the heat, which has a negative impact on the quality of the finished millet flour. In addition, the gelatinized millet flour will increase the loss of the miller during the production process. Summary of the invention

[0004] The invention aims to solve the problems in the prior art that the millet flour is gelatinized due to the increase of the grinding roller temperature and the millet flour with high humidity is easily attached to the inside of the millet mill, and a millet flour grinding device is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A millet flour grinding device, comprising: A body for mounting a pulverizing roller driven to rotate by a motor; A guide cover disposed in the lower end of the machine body and cooperating with the pulverizing roller; A powder collecting box is slidably arranged in the lower end of the machine body, and a detection component for detecting the storage height of millet powder is provided on the powder collecting box; A connecting bucket is installed on the bottom end of the guide cover, and a connecting component for connecting the connecting bucket and the powder collecting box is provided between the connecting bucket and the powder collecting box.

[0006] Preferably, the machine body is a hollow cylindrical structure with an opening at the upper end, a mounting frame for mounting the motor is provided on the machine body, a guide plate fixedly connected to the top of the crushing roller is rotatably mounted on the machine body, and a placement groove for accommodating the powder collection box is provided at the inner bottom end of the machine body.

[0007] Preferably, the crushing roller is a truncated cone structure, the end with a smaller outer diameter of the crushing roller is arranged upward, and the end with a larger outer diameter of the crushing roller is arranged downward, a plurality of groups of crushing knives are installed on the outer wall of the crushing roller, each group of the crushing knives is composed of two staggered blades, a truncated cone-shaped annular cavity is opened in the crushing roller, a water tank for filling coolant is installed on the guide plate, the water tank is connected to the spiral cooling pipe in the truncated cone-shaped annular cavity through a circulating water pump, a semiconductor refrigeration plate is installed on the outer wall of the water tank, a cooling fan is installed on the semiconductor refrigeration plate, and a temperature and humidity sensor is installed on the top of the crushing roller.

[0008] Preferably, the pulverizing knife is provided with a heating wire for heating the blade.

[0009] Preferably, the guide cover is composed of a guide slope and a sieve plate, and the guide slope and the sieve plate are smoothly connected via a transition surface.

[0010] Preferably, the guide cover is provided with a mounting ring cavity corresponding to the guide slope, and a high-frequency vibration module is installed in the mounting ring cavity.

[0011] Preferably, a mounting column is fixedly connected to the bottom end of the crushing roller, an L-shaped roller movably abutting against the sieve plate is fixedly connected to the mounting column, and a plurality of extrusion protrusions corresponding to the filter holes of the sieve plate are arranged on the outer wall of the L-shaped roller.

[0012] Preferably, the longitudinal section of the powder collecting box is an isosceles trapezoid, a closed door is installed on a pin shaft at one end of the powder collecting box, a roller is arranged at the bottom end of the powder collecting box, and a storage groove for accommodating the roller is opened at the bottom end of the body.

[0013] Preferably, the connection assembly comprises: A discharge pipe and a light emitter installed on the bottom end of the connecting bucket; A feeding pipe and a light receiver are installed on the top of the powder collecting box.

[0014] Preferably, the axis of the discharge pipe coincides with that of the feed pipe, and the cross-sectional shapes are the same, and the light receiver is equipped with a buzzer.

[0015] Compared with the prior art, the present invention has the following advantages: 1. The present invention provides a spiral cooling tube in the grinding roller, and determines whether it is necessary to start the circulating water pump through a temperature and humidity sensor. When the temperature of the grinding roller is too high due to friction, the circulating water pump is started, and the heat of the grinding roller is taken away by the flow of the coolant, thereby preventing the millet flour from being gelatinized due to heat. The coolant in the water tank is cooled by a semiconductor refrigeration sheet and a heat dissipation fan, thereby ensuring the cooling effect of the coolant.

[0016] 2. In the present invention, a heating wire is provided in the crushing knife, and a temperature and humidity sensor is used to determine whether the heating wire needs to be started. When the humidity of the air environment is high, the heating wire is started to heat the millet while crushing and grinding it, thereby ensuring the dryness of the millet powder.

[0017] 3. The present invention adopts multiple groups of crushing knives arranged in an upper and lower staggered manner to disperse the grinding pressure and avoid excessive friction at a single point, which helps to reduce the wear of the crushing knives during operation. The crushing is performed by the crushing knives and then the L-shaped rollers are used to crush the millet flour into powder, and finally the millet flour is screened by the sieve plate, which helps to ensure the coarseness of the millet flour and thus improve the quality of the finished millet flour. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure proposed by the present invention; Figure 2 The present invention proposes Figure 1 A cross-sectional view of Figure 3 The present invention proposes Figure 2 A local enlarged structural schematic diagram; Figure 4 This is a schematic diagram of the connection structure between the machine body and the guide cover proposed by the present invention; Figure 5 This is a schematic diagram of the connection structure between the motor and the crushing roller proposed by the present invention; Figure 6 The present invention proposes Figure 5 Bottom view in Figure 7 This is a schematic diagram of the connection structure of the water tank, spiral cooling tube, semiconductor refrigeration plate and heat dissipation fan proposed in the present invention.

[0019] In the figure: 1. Motor; 2. Crushing roller; 201. Crushing knife; 202. Cone-shaped annular cavity; 203. Water tank; 204. Spiral cooling tube; 205. Semiconductor cooling sheet; 206. Cooling fan; 207. Temperature and humidity sensor; 208. Mounting column; 209. L-shaped roller; 2010. Heating wire; 3. Machine body; 301. Mounting frame; 302. Guide plate; 303. Placement slot; 304. Storage slot; 4. Guide cover; 401. Guide slope; 402. Screen plate; 403. Mounting ring cavity; 404. High-frequency vibration module; 5. Detection components; 6. powder collecting box; 601. closed door; 602. roller; 7. Connecting bucket; 8. Connecting assembly; 801. Discharge pipe; 802. Light transmitter; 803. Feed pipe; 804. Light receiver. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] The present invention provides the following preferred embodiments: Embodiment 1

[0022] refer to Figures 1 to 7 As shown, this embodiment provides a millet flour grinding device, which is applicable to areas with low humidity; The first implementation method includes a motor 1, a crushing roller 2, a machine body 3, a guide cover 4, a detection component 5, a powder collecting box 6, a connecting bucket 7 and a connecting component 8, and the components are arranged as follows: The machine body 3 is used to install the crushing roller 2 driven to rotate by the motor 1. The machine body 3 is a hollow cylindrical structure with an opening at the upper end. The machine body 3 is provided with a mounting frame 301 for installing the motor 1. The machine body 3 is rotatably mounted with a guide plate 302 fixedly connected to the top of the crushing roller 2. It should be noted that: the guide plate 302 is made of aluminum alloy. The rotational connection between the guide plate 302 and the machine body 3 reduces the running load of the motor 1. The rotational connection between the guide plate 302 and the machine body 3 is one of a slide groove, a slide rail and a bearing, which is as follows: Adopting a slide groove: by providing an annular slide groove on the inner wall of the upper end of the body 3 and slidingly installing the guide plate 302 in the slide groove, the mass of the body 3 required to be increased when installing the guide plate 302 is reduced; A slide rail is used, by fixing the slide rail on the inner wall of the upper end of the body 3 and slidingly installing the guide plate 302 on the slide rail, thereby preventing the body 3 from causing damage to the original structure of the body 3 when installing the guide plate 302; A bearing is used, by installing the bearing on the inner wall of the upper end of the body 3 and installing the guide plate 302 through the bearing, thereby improving the stability of the guide plate 302 when rotating.

[0023] The crushing roller 2 is a truncated cone structure, and multiple groups of crushing knives 201 are installed on the outer wall of the crushing roller 2. Each group of crushing knives 201 is composed of two staggered blades, so as to disperse the grinding pressure and avoid excessive friction at a single point, which helps to reduce the loss of the crushing knife 201. The blade itself is installed in an inclined manner, and the centrifugal force generated by the rotation of the crushing roller 2 is used to throw the millet away from the blade surface, which helps to avoid the adhesion of the millet to the blade. The blade uses a food-grade non-stick coating to reduce the friction coefficient of the blade surface, further avoiding the adhesion of millet to the blade. The end of the crushing roller 2 with a smaller outer diameter is set upward, and the end of the crushing roller 2 with a larger outer diameter is set downward. The gap between the crushing knife 201 and the inner wall of the body 3 is continuously reduced to ensure the coarseness of the millet being crushed, thereby limiting the maximum volume of the millet when it is discharged and avoiding excessive squeezing of the millet at the beginning to cause adhesion.

[0024] A truncated cone-shaped annular cavity 202 is provided in the crushing roller 2, a water tank 203 for filling coolant is installed on the guide plate 302, and a water changing pipe is provided on the water tank 203 so that the staff can change water regularly. The water tank 203 is connected to the spiral cooling pipe 204 in the truncated cone-shaped annular cavity 202 through a circulating water pump, a semiconductor refrigeration sheet 205 is installed on the outer wall of the water tank 203, and a cooling fan 206 is installed on the semiconductor refrigeration sheet 205. The cooling liquid is circulated in the spiral cooling pipe 204 through the circulating water pump, and the water circulation transports the cooling liquid to the crushing roller 2 through the circulating water pump, absorbs the heat generated by the operation of the crushing roller 2, and then uses the semiconductor refrigeration sheet 205 to cooperate with the cooling fan 206 to exchange heat with the air and cool it down, and finally returns to the crushing roller 2 for reuse. By reusing water resources, the water consumption is reduced by more than 95%, which helps to reduce the water fee and energy cost of the enterprise. A temperature and humidity sensor 207 is installed on the top of the crushing roller 2, and the humidity in the air and the temperature of the crushing roller 2 are sensed by the temperature and humidity sensor 207.

[0025] The guide cover 4 is arranged in the lower end of the machine body 3 and cooperates with the crushing roller 2. The guide cover 4 is composed of a guide slope 401 and a sieve plate 402. The guide slope 401 and the sieve plate 402 are smoothly connected through a transition surface. The bottom end of the crushing roller 2 is fixedly connected with a mounting column 208, and the mounting column 208 is fixedly connected with an L-shaped roller 209 that is movably opposed to the sieve plate 402. The millet powder is guided to the sieve plate 402 under the action of gravity and is crushed by the L-shaped roller 209 to improve the fineness of the millet powder. The outer wall of the L-shaped roller 209 is provided with a plurality of extrusion convex points corresponding to the filter holes of the sieve plate 402, so as to actively squeeze the qualified millet powder out, which helps to improve the discharge efficiency of the millet powder.

[0026] The powder collecting box 6 is slidably arranged at the lower end of the machine body 3. It should be noted that the machine body 3 is equipped with two powder collecting boxes 6, so that when one of the powder collecting boxes 6 is full, the other empty powder collecting box 6 can be directly replaced to continue the operation, which is helpful to improve the production efficiency of millet flour. The powder collecting box 6 is provided with a detection component 5 for detecting the storage height of millet flour. The detection component 5 has the following implementation methods: Ultrasonic sensor: An ultrasonic sensor is installed on the inclined end face of the powder collecting box 6. By emitting ultrasonic waves and receiving reflected signals, the distance between the material surface and the sensor is calculated. A buzzer is also installed in conjunction with the sensor. When the storage amount of millet powder in the powder collecting box 6 is qualified, the buzzer starts to alert the staff to take out the powder collecting box 6.

[0027] Capacitive level sensor: Install a capacitive level sensor on the inclined end face of the powder collecting box 6, and extend the probe into the powder collecting box 6. Judge the material height by detecting the change in capacitance between the material and the sensor, and install a buzzer. When the storage amount of millet powder in the powder collecting box 6 is qualified, the buzzer starts to alert the staff to take out the powder collecting box 6.

[0028] Pressure sensor: A pressure sensor is installed at the bottom of the body 3 and is movable against the bottom of the powder collecting box 6. The storage height of the millet powder is calculated by detecting the pressure change of the millet powder on the bottom of the box. A buzzer is installed in conjunction with it. When the storage amount of millet powder in the powder collecting box 6 is qualified, the buzzer starts to alert the staff to take out the powder collecting box 6.

[0029] A placement groove 303 for accommodating the powder collecting box 6 is provided at the bottom inner end of the machine body 3. The longitudinal section of the powder collecting box 6 is an isosceles trapezoid. A closed door 601 is installed on a pin shaft at one end of the powder collecting box 6. A roller 602 is provided at the bottom end of the powder collecting box 6. A storage groove 304 for accommodating the roller 602 is provided at the bottom inner end of the machine body 3. It should be noted that the placement groove 303 is connected to the end of the powder collecting box 6 away from the closed door 601 by magnetic attraction. The closed door 601 is also installed on the powder collecting box 6 by a pin shaft in the form of a magnetic flip cover, and the powder collecting box 6 is provided with a front and a rear magnetic ring that is connected to the closed door 601, so as to meet the stability of the closed door 601 in both the open state and the closed state.

[0030] The connecting bucket 7 is installed on the bottom end of the guide cover 4. A connecting assembly 8 for connecting the connecting bucket 7 and the powder collecting box 6 is provided between the connecting bucket 7 and the powder collecting box 6. The connecting assembly 8 includes a discharge pipe 801 and a feed pipe 803. The components are arranged as follows: The discharge pipe 801 is installed on the bottom end of the connecting bucket 7, and a valve body is provided on the discharge pipe 801. The feed pipe 803 is installed on the top end of the powder collecting box 6. The axis of the discharge pipe 801 coincides with that of the feed pipe 803, and the cross-sectional shapes are the same.

[0031] When using the millet flour grinding device in the above implementation method, follow the steps below: Pour the millet into the machine body 3 along the outer wall of the crushing roller 2, and at the same time start the motor 1 to drive the guide plate 302 and the crushing roller 2 to rotate, and the crushing roller 2 drives the crushing knife 201 to crush the millet; The crushed millet enters the sieve plate 402 under the guidance of the guide slope 401, and the crushing roller 2 drives the mounting column 208 to rotate, and the mounting column 208 drives the L-shaped roller 209 to crush the millet powder on the sieve plate 402 and squeeze the millet powder into the connecting bucket 7. The millet powder enters the feed pipe 803 through the discharge pipe 801, and enters the powder collecting box 6 through the feed pipe 803; When the detection component 5 determines that the storage amount of millet powder is qualified, the buzzer provided therewith is started and emits three sounds to warn the staff to replace the powder collecting box 6. The staff controls the valve body on the discharge pipe 801 to close, then pulls out the powder collecting box 6, and pushes another empty powder collecting box 6 into the placement groove 303; When the temperature and humidity sensor 207 senses that the temperature of the crushing roller 2 is too high, the circulating water pump is started to circulate the coolant in the spiral cooling tube 204 to cool the crushing roller 2, and the semiconductor refrigeration sheet 205 and the cooling fan 206 are started to cool the coolant in the water tank 203 to ensure the cooling effect of the coolant.

[0032] Implementation Method 2 refer to Figures 2 to 4 As shown, on the basis of implementation method one, this implementation method further refines the millet powder grinding device and introduces a high-frequency vibration module 404 to prevent the millet powder from adhering to the guide slope 401. The specific implementation method is as follows: a mounting ring cavity 403 corresponding to the guide slope 401 is opened on the guide cover 4, and a high-frequency vibration module 404 is installed in the mounting ring cavity 403. The high-frequency vibration module 404 adopts piezoelectric drive, and utilizes the inverse piezoelectric effect of piezoelectric ceramic materials to produce tiny deformations under the action of the electric field, thereby driving vibration, thereby accelerating the sliding efficiency of the millet powder on the guide slope 401 and improving the screening efficiency of the screen plate 402.

[0033] Implementation method three refer to Figure 2 and Figure 3As shown, on the basis of implementation method one, this implementation method further refines the millet powder grinding device, and introduces a light emitter 802 and a light receiver 804 into the connecting component 8. The specific implementation method is as follows: the light emitter 802 is installed on the bottom end of the connecting bucket 7, and the light receiver 804 is installed on the top of the powder collecting box 6. The axis of the discharge pipe 801 coincides with that of the feed pipe 803, and the cross-sectional shape is the same. The light receiver 804 is equipped with a buzzer. When the staff pushes the powder collecting box 6 into the placement slot 303, the light emitted by the light emitter 802 is received by the light receiver 804. At this time, the buzzer equipped with the light receiver 804 will make a sound to remind the staff that the powder collecting box 6 is in place. At this time, the discharge pipe 801 and the feed pipe 803 are arranged correspondingly up and down.

[0034] Embodiment 2

[0035] refer to Figure 1 and Figure 2 As shown, this embodiment provides a millet flour grinding device. The structure of this embodiment is basically the same as that of the first embodiment, except that: this embodiment is applicable to areas with high humidity, and a heating wire 2010 for heating the blade is provided in the crushing blade 201, wherein the installation method of the heating wire 2010 can adopt the following methods: Embedded: A groove is made inside the crushing blade 201, and the heating wire 2010 is embedded and fixed to ensure that the heating wire 2010 is tightly combined with the blade.

[0036] Surface lamination: Lay the heating wire 2010 on the surface of the crushing blade 201 and cover and protect it with high temperature resistant glue or ceramic coating.

[0037] Multi-layer composite: The crushing blade 201 is sandwiched between multiple layers of blade material to improve overall strength and thermal conductivity.

[0038] It should be noted that: with the middle position of the crushing roller 2 as the dividing line, the crushing knife 201 located at the upper end of the crushing roller 2 is equipped with a heating wire 2010, while the crushing knife 201 located at the lower end of the crushing roller 2 is not equipped with the heating wire 2010, and the closer the heating wire 2010 is to the top of the crushing roller 2, the higher the temperature generated, so as to ensure that the temperature of the area that the millet first contacts is higher, thereby reducing the humidity at the feeding end of the machine body 3, thereby preventing the millet from getting damp and agglomerating during the crushing process, the heating wire 2010 is installed at the end position of the crushing knife 201 located at the upper end of the crushing roller 2 close to the machine body 3, while the crushing knife 201 located at the upper end of the crushing roller 2 close to the end position of the crushing roller 2 is not equipped with the heating wire 2010, and the crushing knife 201 located at the upper end of the crushing roller 2 is provided with a heat insulation layer at the end position of the crushing roller 2 close to the crushing roller 2, so as to avoid a substantial increase in the temperature of the crushing roller 2 after the heating wire 210 is started.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A millet flour grinding device, characterized in that: include: A body (3) for mounting a pulverizing roller (2) driven to rotate by a motor (1); a guide cover (4) disposed at the lower end of the machine body (3) and cooperating with the pulverizing roller (2); A powder collecting box (6) slidably disposed in the lower end of the machine body (3), wherein the powder collecting box (6) is provided with a detection component (5) for detecting the storage height of millet powder; A connecting bucket (7) is mounted on the bottom end of the guide cover (4), and a connecting component (8) for connecting the connecting bucket (7) and the powder collecting box (6) is provided between the connecting bucket (7) and the powder collecting box (6).

2. The millet powder grinding device according to claim 1, characterized in that: The machine body (3) is a hollow cylindrical structure with an opening at the upper end. A mounting frame (301) for mounting the motor (1) is provided on the machine body (3). A guide plate (302) fixedly connected to the top of the crushing roller (2) is rotatably mounted on the machine body (3). A placement groove (303) for accommodating the powder collecting box (6) is provided at the inner bottom end of the machine body (3).

3. The millet powder grinding device according to claim 2, characterized in that: The crushing roller (2) is a truncated cone structure. The end of the crushing roller (2) with a smaller outer diameter is arranged upward, and the end of the crushing roller (2) with a larger outer diameter is arranged downward. The outer wall of the crushing roller (2) is equipped with multiple groups of crushing knives (201), and each group of the crushing knives (201) is composed of two staggered blades. A truncated cone-shaped annular cavity (202) is provided in the crushing roller (2). A water tank (203) for filling coolant is installed on the guide plate (302). The water tank (203) is connected to the spiral cooling pipe (204) in the truncated cone-shaped annular cavity (202) via a circulating water pump. A semiconductor cooling sheet (205) is installed on the outer wall of the water tank (203). A cooling fan (206) is installed on the semiconductor cooling sheet (205). A temperature and humidity sensor (207) is installed on the top of the crushing roller (2).

4. The millet powder grinding device according to claim 3, characterized in that: The crushing blade (201) is provided with a heating wire (2010) for heating the blade body.

5. The millet flour grinding device according to claim 1, characterized in that: The guide cover (4) is composed of a guide slope (401) and a sieve plate (402), and the guide slope (401) and the sieve plate (402) are smoothly connected via a transition surface.

6. The millet flour grinding device according to claim 5, characterized in that: The guide cover (4) is provided with a mounting annular cavity (403) corresponding to the guide slope surface (401), and a high-frequency vibration module (404) is installed in the mounting annular cavity (403).

7. The millet flour grinding device according to claim 1, characterized in that: The bottom end of the crushing roller (2) is fixedly connected to a mounting column (208), and an L-shaped roller (209) that movably contacts the sieve plate (402) is fixedly connected to the mounting column (208), and the outer wall of the L-shaped roller (209) is provided with a plurality of extrusion protrusions that are arranged corresponding to the filter holes of the sieve plate (402).

8. The millet flour grinding device according to claim 1, characterized in that: The powder collecting box (6) has a longitudinal section in the form of an isosceles trapezoid; a closed door (601) is mounted on a pin at one end of the powder collecting box (6); a roller (602) is disposed at the bottom end of the powder collecting box (6); and a storage groove (304) for storing the roller (602) is provided at the bottom end of the machine body (3).

9. The millet flour grinding device according to claim 1, characterized in that: The connection component (8) comprises: A discharge pipe (801) and a light emitter (802) mounted on the bottom end of the connecting bucket (7); A feeding pipe (803) and a light receiver (804) are installed on the top of the powder collecting box (6).

10. The millet flour grinding device according to claim 9, characterized in that: The axis of the discharge pipe (801) coincides with that of the feed pipe (803), and the cross-sectional shapes are the same. The light receiver (804) is provided with a buzzer.

Images