Automatic milling equipment and automatic grain handling systems

Abstract

The present invention provides a grain processing system that can realize real-time feedback automatic control and has low cost, wherein the automatic grinding equipment includes: grinding equipment and control equipment, the grinding equipment has a main roller, a main roller driving mechanism that drives the main roller to rotate, a sand belt driven by the main roller, a plurality of whitening chambers for accommodating grains and cooperating with the sand belt to realize grinding, and a discharge mechanism for discharging the grains after being ground in the whitening chamber, the main roller driving mechanism is a motor, and the control equipment includes: a standard current value storage unit, which stores a pre-set standard grinding current value; a grinding current value acquisition unit, which continuously and in real time acquires the current grinding current value of the main roller driving mechanism during the grain grinding process; a comparison and judgment unit, which continuously judges the size of the current current value and the standard grinding current value; and a speed control unit, which is used to control the speed of the main roller driving mechanism during operation.

Description

Technical Field

[0001] The invention belongs to the field of grain processing machinery, and in particular relates to automatic grinding equipment for grinding grains and an automatic grain processing system comprising the automatic grinding equipment. Background Art

[0002] Milling is often required during grain processing. For example, after the husk is removed from the grain, brown rice is formed. After the brown rice is milled to remove the cortex, germ, etc., polished rice is formed.

[0003] In existing technology, all operating parameters of milling equipment are fixed at the beginning of processing. After a period of processing, operators collect samples for analysis and adjust the parameters based on the results. This constant need for operators to perform sampling, analysis, and adjustments requires constant on-site supervision, which is labor-intensive. Furthermore, manual judgment carries the potential for error, which can lead to product quality fluctuations or even substandard quality.

[0004] In addition, there are various deficiencies when using automatic control for the above-mentioned grinding equipment. For example, if automatic sampling equipment is used for automatic sampling, automatic analysis and automatic control, not only is the cost high, but its feedback is not real-time, resulting in a certain lag in the control action. Summary of the Invention

[0005] To solve the above problems, a low-cost grain processing system capable of achieving real-time feedback automatic control is provided. The present invention adopts the following technical solutions:

[0006] The present invention provides an automatic grinding device for grinding grains, which is characterized in that it includes: a grinding device for grinding grains; and a control device for controlling the grinding process, wherein the grinding device has a main roller, a main roller driving mechanism for driving the main roller to rotate, a sand belt driven by the main roller, a plurality of whitening chambers for accommodating grains and cooperating with the sand belt to achieve grinding, and a discharge mechanism for discharging the grains after the whitening chamber is ground, the main roller driving mechanism is a motor, and the control device includes: a standard current value storage unit for storing a pre-set standard grinding current value; a grinding current value acquisition unit for continuously and in real time acquiring the current grinding current value of the main roller driving mechanism during the grinding process of the grains; a comparison and judgment unit for continuously judging the size of the current current value and the standard grinding current value; and a speed control unit for controlling the speed of the main roller driving mechanism during operation, including: controlling the main roller driving mechanism to increase the speed when the current grinding current value is less than the standard grinding current value, and controlling the main roller driving mechanism to reduce the speed when the current grinding current value is greater than the standard grinding current value.

[0007] In the automatic grinding equipment provided by the present invention, the control device may also include: a discharge control unit, used to control the discharge mechanism to change the discharge flow rate, including: reducing the discharge flow rate when the current grinding current value is less than the standard grinding current value, and increasing the discharge flow rate when the current grinding current value is greater than the standard grinding current value.

[0008] Furthermore, the discharging mechanism may include: a grinding chamber discharging assembly, having an outlet portion arranged at the lower end of the grinding chamber, a rotating plate rotatably installed in the outlet portion, and a toggle member capable of pushing the rotating plate to rotate; a discharging adjustment assembly, having a turntable capable of pushing the toggle member to rotate to change the angle of the rotating plate and a driving member driving the turntable to rotate, and the discharging control portion drives the turntable to rotate by controlling the driving member to change the grinding opening angle between the rotating plate and the outlet portion, thereby changing the discharging flow rate.

[0009] In addition, as another solution, the discharge mechanism may include a plurality of discharge valves arranged at the lower end of the milling chamber, wherein the discharge valve is an electrically controlled valve, and the discharge control unit changes the discharge flow rate by controlling the milling opening angle of the electrically controlled valve.

[0010] In addition, the control device may also include: a main control unit. When the comparison and judgment unit determines that the current current value is less than the standard grinding current value, the main control unit first controls the discharge control unit to reduce the discharge flow rate. After a predetermined time, when the comparison and judgment unit still determines that the current current value is less than the standard grinding current value, the main control unit controls the speed control unit to control the main roller drive mechanism to increase the speed. When the comparison and judgment unit determines that the current current value is greater than the standard grinding current value, the main control unit first controls the discharge control unit to increase the discharge flow rate. After a predetermined time, when the comparison and judgment unit still determines that the current current value is greater than the standard grinding current value, the main control unit controls the speed control unit to control the main roller drive mechanism to reduce the speed.

[0011] As another alternative, the control device can also include: a main control part, a production capacity acquisition part and a current production capacity setting part. The automatic grinding equipment is also connected in series with at least one other processing equipment. The production capacity acquisition part obtains the processing volume per unit time from at least one other processing equipment as the relevant production capacity. The current production capacity setting part sets a numerical range with a predetermined upper and lower limit difference with the relevant production capacity as the current production capacity range according to the relevant production capacity. When the comparison and judgment part judges that the current current value is less than the standard grinding current value, the main control part first controls the discharge control part to reduce the discharge flow rate. After the discharge flow rate reaches the lower limit of the current production capacity range, the comparison and judgment part still judges that the current current value is less than the standard grinding current value, and then controls the speed control part to control the main roller drive mechanism to increase the speed. When the comparison and judgment part judges that the current current value is greater than the standard grinding current value, the main control part first controls the discharge control part to increase the discharge flow rate. After the discharge flow rate reaches the upper limit of the current production capacity range, the comparison and judgment part still judges that the current current value is greater than the standard grinding current value, and then controls the speed control part to control the main roller drive mechanism to reduce the speed.

[0012] In the automatic grinding equipment provided by the present invention, the grinding current value acquisition part may include a no-load current value storage unit, a current current value acquisition unit and a grinding current value calculation unit. The current current value acquisition unit acquires the current of the no-load startup of the main roller drive mechanism as the no-load current value. The no-load current value storage unit stores the no-load current value. The current current value acquisition unit acquires the current working current value of the main roller drive mechanism. The grinding current value calculation part subtracts the current working current value from the no-load current value to obtain the current grinding current value.

[0013] In the automatic grinding equipment provided by the present invention, the control device may also include a retrieval and acquisition unit, an input and display unit, and a screen storage unit. The standard current value storage unit stores multiple grinding types and standard grinding current values ​​corresponding to the multiple grinding types. The screen storage unit stores a grinding type selection screen. The input display unit displays the grinding type selection screen before starting the grinding process to allow the operator to select the grain to be milled as the current grinding type. The retrieval and acquisition unit retrieves the standard grinding current value storage unit and obtains the grinding type that matches the current grinding type selected by the user and the corresponding standard grinding current value as the standard grinding current value for the current grinding process.

[0014] The present invention also provides an automatic grain processing system for processing grains including grinding, which is characterized in that it includes: at least one automatic grinding device and other processing equipment for performing other processing on grains besides grinding, the automatic grinding device and other processing equipment are connected in series, and the automatic grinding device is any of the automatic grinding devices as described above.

[0015] Furthermore, there may be multiple automatic grinding devices, and the multiple automatic grinding devices are connected in series.

[0016] Functions and effects of the invention

[0017] According to the automatic grinding equipment provided by the present invention, since the grinding current value acquisition part can obtain the current grinding current corresponding to the grain grinding degree, the comparison and judgment part can compare and judge the current grinding current with the standard grinding current value, and the speed control part can perform corresponding speed control according to the result of the comparison and judgment, the grinding degree can be changed by adjusting the speed when the grain grinding degree is too deep or insufficient, so that the grain can always be ground to the optimal degree. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 1 is a structural block diagram of an automatic grinding device according to a first embodiment of the present invention;

[0019] Figure 2 is a side structural diagram of an automatic grinding device according to a first embodiment of the present invention;

[0020] Figure 3 is a three-dimensional structural diagram of the automatic grinding equipment according to the first embodiment of the present invention;

[0021] Figure 4 1 is a top view of the structure of the grinding device according to the first embodiment of the present invention;

[0022] Figure 5 1 is a structural diagram of a whitening chamber according to a first embodiment of the present invention;

[0023] Figure 6 is a three-dimensional structural diagram of a milling chamber discharge assembly according to an embodiment of the present invention;

[0024] Figure 7 This is a cross-sectional structural diagram of the milling chamber discharge assembly in an embodiment of the present invention;

[0025] Figure 8 This is a three-dimensional structural diagram of the whitening chamber and the discharge adjustment assembly in the embodiment of the present invention in a coordinated state;

[0026] Figure 9 This is a cross-sectional structural diagram of the whitening chamber and the discharge adjustment assembly in the embodiment of the present invention in the coordinated state;

[0027] Figure 10 This is a flow chart of the operation of the automatic grinding equipment according to the first embodiment of the present invention;

[0028] Figure 11 It is a structural block diagram of the automatic grinding equipment of Example 2 of the present invention.

[0029] Reference numerals: automatic grinding device 100, 400; grinding device 10; grinding device 1; frame 11; base 111; column 112; main drum 12; main drum body 121; main drum shaft 122; tensioning drum 13; sanding belt 14; whitening chamber 15; grinding chamber 151; discharge channel 152; feed port 153; discharge port 154; discharge pipe 16; bran discharge channel 17; fan 18; silo 2; main drum driving mechanism 3; feed mechanism 4; discharge mechanism 5; discharge mounting platform 50; outlet portion 51; rotating plate 52; reset member 53; toggle member 54; turntable 55; notch 55a; coupling 56; driving member 57; push rod 58; proximity switch 1 59; proximity switch 2 60; control device 20; input display unit 21; standard current value storage unit 22; image storage unit 23; grinding current value threshold storage unit 24; retrieval acquisition unit 25; grinding current value acquisition unit 26; current current value acquisition unit 261; no-load current value storage unit 262; grinding current value calculation unit 263; comparison and judgment unit 27; speed control unit 28; discharge control unit 29; main control unit 30; production capacity acquisition unit 31; current production capacity setting unit 32. DETAILED DESCRIPTION

[0030] The specific implementation of the present invention is described below with reference to the accompanying drawings and embodiments.

[0031] <Example 1>

[0032] This embodiment provides an automatic grinding device for grinding grains.

[0033] Figure 1 : is a structural block diagram of the automatic grinding equipment of embodiment 1 of the present invention, Figure 2 It is a side structural diagram of the automatic grinding equipment according to the first embodiment of the present invention.

[0034] like Figure 1 as well as Figure 2 As shown, the automatic grinding device 100 includes a grinding device 10 and a control device 20. The grinding device 10 includes a grinding device 1, a silo 2, a main roller drive mechanism 3, a feed mechanism 4, and a discharge mechanism 5. The silo 2 is disposed above the grinding device and is secured by a support structure such as a support frame or support column (the support structure is not shown in the figure).

[0035] Figure 3 This is a three-dimensional structural diagram of the grinding equipment according to the first embodiment of the present invention. Figure 3 The silo 2 and the structures below the platform 200 are omitted.

[0036] like Figure 1-Figure 3 As shown, the grinding device 1 includes a frame 11, a main roller 12, a tensioning roller 13, a sanding belt 14 and a plurality of whitening chambers 15.

[0037] Figure 4 This is a top view of the structure of the grinding equipment according to the first embodiment of the present invention. Figure 4 The silo 2, the feeding mechanism 4 and the whitening chamber 15 are omitted.

[0038] like Figure 2-Figure 4 As shown, the frame 11 has a base 111 , a column 112 and a top cover 113 .

[0039] The base 111 is in the shape of a rectangular plate and is used to support the entire grinding device 1 .

[0040] like Figure 2 As shown, in this embodiment, the grinding device 10 is set on a platform 200 above the ground in the production workshop, so the base 111 is placed on the upper surface of the platform 200.

[0041] There are two upright posts 112 , both of which are hollow columnar structures with an approximately rectangular cross-section. They are disposed on the base 11 and are located at two adjacent corners of the base 111 .

[0042] The top cover 113 is arranged across the top ends of the two columns 112, covering the two columns 112 (the top cover 113 is Figure 4 are omitted).

[0043] The main drum 12 includes a cylindrical main drum body 121 and a main drum shaft 122. The main drum body 121 is cylindrical and is arranged on the top of the discharge mounting platform 50, extending in the vertical direction, and the end surface is parallel to the horizontal plane.

[0044] The main drum shaft 122 is disposed at the axis center of the main drum body 121 and is fixedly connected to the main drum 12 .

[0045] In this embodiment, the main roller driving mechanism 3 is a motor with adjustable speed, the output end of which is fixedly connected to the main roller shaft 122 and can drive the main roller shaft 122 to rotate, thereby driving the main cylinder body 21 to rotate.

[0046] The tensioning roller 13 is arranged at one side of the main roller 12 , and its axis is substantially parallel to the axis of the main roller 12 .

[0047] The abrasive belt 14 is mounted on the outer sides of the main drum 121 and the tensioning drum 13. Its outer surface is roughened and is used to contact the grain for grinding. In addition, a belt deflection adjustment device can be provided on the tensioning drum 13 to prevent the belt from shifting. The specific structure and operating principle of this device can be adopted from the patent CN 202021909873.1 previously applied for by the applicant and will not be repeated here.

[0048] like Figure 2 、 Figure 3As shown, the feed mechanism 4 is located at the top of the main cylinder 121 and has an external appearance of a truncated cone with a small top and a large bottom. Multiple feed passages are formed internally, separated by partitions. The top of the feed mechanism 4 is connected to the silo 2 via a feed pipe, allowing grain in the silo 2 to enter the feed mechanism 4 and be divided into multiple feed passages by the feed pipe. In this embodiment, a feed valve (not shown) is provided at the connection between the feed mechanism 4 and the feed pipe.

[0049] A plurality of whitening chambers 15 are arranged evenly along the circumferential direction and close to the sanding belt 14 on the outer side of the circumferential surface of the main cylinder 121. In this embodiment, the number of whitening chambers 15 and feed passages is 12, and each whitening chamber 15 corresponds to a feed passage.

[0050] Figure 5 It is a structural diagram of the whitening chamber of the first embodiment of the present invention.

[0051] like Figure 5 As shown, the whitening chamber 15 is used to accommodate grains and cooperate with the sand belt 14 to grind the grains. It has a grinding cavity 151, a discharge channel 152, a feed port 153 and a discharge port 154.

[0052] The grinding chamber 151 is a vertically extending channel structure comprising three sequentially connected flat plates. The cross-section of the structure formed by these three plates is trapezoidal, with the longer bottom portion of the trapezoid being open, facing the abrasive belt 14 so as to mate with the abrasive belt 14. The bottom portion of the grinding chamber 151 is a grinding opening, and the top portion is a grinding chamber inlet.

[0053] The discharge channel 152 is disposed at the bottom of the grinding chamber 151, with its upper end communicating with the bottom of the grinding chamber 151. The discharge channel 152 is inclined relative to the grinding chamber 151, that is, the length of the discharge channel 152 forms an obtuse angle with the length of the grinding chamber 151.

[0054] The feed port 153 is disposed at the top of the grinding chamber 151 , with its upper portion communicating with the bottom end of the corresponding feed passage, and its lower portion communicating with the top end of the grinding chamber 151 .

[0055] The discharge port 154 is disposed at the bottom of the discharge channel 152 and communicates with the bottom end of the discharge channel 152 .

[0056] In this embodiment, the discharge mechanism 5 is used to discharge the grain after being ground in the whitening chamber 15. It includes multiple grinding chamber discharge assemblies, a discharge adjustment assembly, and a discharge mounting platform 50 that accommodates the grinding chamber discharge assemblies and the discharge adjustment assembly. The discharge mounting platform 50 is mounted on the base 111 and has a hollow cylindrical cross-section with a circular arc greater than 60°. The number of grinding chamber discharge assemblies is the same as that of the whitening chambers 15, namely 12, and each corresponds to a whitening chamber 15.

[0057] Figure 6 This is a three-dimensional structural diagram of the milling chamber discharge assembly according to an embodiment of the present invention. Figure 7 It is a cross-sectional structural diagram of the grinding chamber discharge assembly position in an embodiment of the present invention.

[0058] like Figure 6 and Figure 7 As shown, in this embodiment, each grinding chamber discharge assembly includes an outlet portion 51 , a rotating plate 52 , a reset member 53 and a toggle member 54 .

[0059] The outlet portion 51 is in the shape of a rectangular frame and is disposed at the lower end of the milling chamber 15 . The upper portion thereof is communicated with the milling chamber 151 , and the lower portion thereof is communicated with the discharge channel 152 .

[0060] The rotating plate 52 is a flat plate that can rotate around a horizontal axis and has a rotating end rotatably mounted in the outlet portion 51 and a free end opposite to the rotating end. Specifically, the rotating end is rotatably mounted in the outlet portion 51 at a position close to the inner wall through a pin.

[0061] The reset member 53 is a torsion spring mounted on the pin of the rotating plate 52 , which provides a spring force to the rotating plate 52 to make the rotating plate 52 close to the outlet portion 51 .

[0062] The toggle member 54 is disposed below the rotating plate 52 and close to the rotating end. The toggle member 54 can contact the lower surface of the rotating plate 52 and push the rotating plate 72 to rotate toward the edge of the outlet portion 51 .

[0063] Figure 8 This is a three-dimensional structural diagram of the whitening chamber and the discharge adjustment component in the embodiment of the present invention. Figure 8 FIG. 1 shows a state in which a whitening chamber 15 cooperates with a discharge adjustment assembly. Figure 9 It is a cross-sectional structural diagram of the whitening chamber and the discharge adjustment component in the coordinated state according to an embodiment of the present invention.

[0064] like Figure 8 、 Figure 9 As shown, the discharge adjustment assembly includes a turntable 55, a coupling 56, a push rod 58, a proximity switch 1 59, a proximity switch 2 60 and a driving member 57.

[0065] The turntable 55 is mounted on the bottom of the main drum 12, and its axis coincides with the axis of the main drum 121. The edge of the turntable 55 is provided with a plurality of notches 55a, each notch 55a corresponding to the position of the toggle member 54 and fitted with the toggle member 54.

[0066] When the turntable 55 rotates clockwise or counterclockwise, it can push the toggle member 54 to Figure 9By moving the rotating plate 52 to the left or right, the angle between the rotating plate 52 and the outlet portion 51 is increased or decreased, and the opening formed between the two is increased or decreased, so that the flow rate of grains flowing out of the grinding cavity 151 is increased or decreased. In other words, it can play the role of regulating the discharge flow rate.

[0067] The coupling shaft 56 is fixedly connected to the bottom of the turntable 55 and extends downward from the bottom surface of the turntable 55 .

[0068] The push rod 58 is provided on one side of the coupling 56 and is connected to the coupling 56 . The push rod 58 can push the coupling 56 to swing in the horizontal direction, thereby driving the turntable 55 to rotate clockwise or counterclockwise in the horizontal plane.

[0069] The driving member 57 is a motor that can drive the push rod 58 to move, thereby pushing the coupling 56 to move. Specifically, the driving member 57 can be formed by a stepping motor.

[0070] Proximity switch 1 59 is positioned below turntable 55. It corresponds to the position of coupling 56 when rotating plate 52 is fully abutting outlet 51 (i.e., the opening between them is closed). It senses the distance between it and coupling 56 and generates a corresponding electrical signal. Because the opening between rotating plate 52 and outlet 51 effectively forms the outlet for grain in grinding chamber 151, for ease of description, the opening formed between rotating plate 52 and outlet 51 will be referred to as the grinding opening.

[0071] The proximity switch 2 60 is arranged below the turntable 55, corresponding to the position of the coupling 56 when the rotating plate 52 is farthest from the outlet 51 (i.e. the grinding opening is fully opened), and can sense the distance between it and the coupling 56 and generate a corresponding electrical signal.

[0072] That is to say, the positions of proximity switch 1 59 and proximity switch 2 60 respectively correspond to the starting point and the end point of the travel of the rotating plate 52 from fully closed to fully open. Based on the electrical signals of the two, the current position of the coupling 56 and the degree of rotation of the turntable 55 can be analyzed and judged, and then the degree of opening and closing of the grinding opening can be obtained and feedback control can be performed based on the degree of opening and closing.

[0073] The discharge mounting platform 50 is internally provided with a plurality of discharge passages (not shown), 12 in number, distributed circumferentially and corresponding to the positions of the respective whitening chambers 15. Each discharge passage is approximately tubular in shape, with its upper end connected to the lower end of the outlet portion 51, so that grain in the whitening chamber 151 can flow downward through the outlet portion 51 into the discharge passage.

[0074] like Figure 2As shown, a discharge pipe 16 is provided below the discharge mounting platform 50, which passes through the base 111 and continues to extend downward until it reaches the bottom of the platform 200. The lower end of each discharge channel is connected to the discharge pipe 16, so that the grains ground in the whitening chamber 15 can flow into the discharge pipe and then flow into other equipment through the discharge pipe. In addition, a bran discharge channel 17 is provided below the discharge mounting platform 50, and its upper end is connected to the bottom of the discharge mounting platform 50. The bran powder formed after the grinding belt 14 falls directly into the discharge mounting platform 50 and is collected by the bran discharge channel 17 and discharged. A fan 18 is also provided on the bran discharge channel 17 for extracting air from the bran discharge channel 17 to promote the discharge of bran powder in the bran discharge channel 17.

[0075] like Figure 1 As shown, the control device 20 includes an input display unit 21, a standard current value storage unit 22, a screen storage unit 23, a grinding current value threshold storage unit 24, a retrieval acquisition unit 25, a grinding current value acquisition unit 26, a comparison and judgment unit 27, a speed control unit 28, a discharge control unit 29 and a main control unit 30.

[0076] The input display unit 21 is a touch screen display for allowing an operator to perform human-computer interaction operations.

[0077] The standard current value storage unit 22 stores a plurality of milling varieties and standard milling current values ​​corresponding to the plurality of milling varieties. The milling varieties include a plurality of grain types and different grain varieties corresponding to the same grain type. For example, the milling varieties may include glutinous rice, indica rice, japonica rice, brown rice, and wheat.

[0078] The screen storage unit 23 stores human-computer interaction screens for display on the input display unit 21, including a grinding type selection screen and a grinding status display screen. The grinding type selection screen displays the grinding types stored in the standard current value storage unit 23, allowing the operator to select the current grinding type to be performed. The grinding status display screen displays information such as the current current value and rotational speed during the grinding process.

[0079] The grinding current threshold storage unit 24 stores a grinding current threshold value. This grinding current threshold value is the maximum grinding current value of the main roller drive mechanism 3 under normal operation. Once this grinding current threshold value is exceeded, it indicates that the equipment is not operating normally, such as due to the presence of foreign matter. In this embodiment, the grinding current threshold storage unit 24 stores multiple types of grinding and the grinding current threshold values ​​corresponding to each type of grinding.

[0080] The retrieval unit 25 is configured to retrieve the standard current value and milling current threshold for the corresponding milling type based on the operator's selection. Specifically, once the operator selects the milling type to be processed via the milling type selection screen displayed on the input display unit 21, the retrieval unit 25 retrieves the corresponding standard current value from the standard current value storage unit 22 as the current standard current value, and retrieves the corresponding milling current threshold from the milling current threshold 24 as the current milling current threshold.

[0081] The milling current value acquisition unit 26 includes a current value acquisition unit 261 , a no-load current value storage unit 262 , and a milling current value calculation unit 263 .

[0082] The current current value acquisition unit 261 is used to acquire the current operating current value of the main roller drive mechanism 3 during operation. In this embodiment, the current current value acquisition unit 261 is provided in the frequency converter of the motor constituting the main roller drive mechanism 3, thereby directly acquiring the current operating current value.

[0083] The no-load current value storage unit 262 stores the no-load current value. In this embodiment, the no-load current value storage unit 262 is a temporary storage unit. When the main roller drive mechanism 3 is turned on, if no grain to be milled is added for an initial predetermined time (e.g., approximately 5 seconds), the current operating current value of the main roller drive mechanism 3 obtained by the current current value acquisition unit 261 is the no-load current value. The no-load current value storage unit 262 temporarily stores this no-load current value.

[0084] The milling current value calculation unit 263 is used to calculate the milling current value. Specifically, the milling current value calculation unit 263 subtracts the no-load current value stored in the no-load current value storage unit 262 from the current working current value obtained by the current current value acquisition unit 261 at different times during the milling process, that is, obtains the current milling current value at different times.

[0085] Comparison and determination unit 27 is configured to compare the current milling current value with the standard milling current value, thereby determining whether the current milling current value is greater than, less than, or equal to the standard milling current value. The "equal" criterion may be approximately equal, for example, if the current milling current value is within ±5% of the standard milling current value.

[0086] The speed control unit 28 is used to control the speed of the main roller drive mechanism 3 during operation, including: when the comparison and judgment unit 27 judges that the current grinding current value is less than the standard grinding current value, controlling the main roller drive mechanism 3 to increase the speed; when the comparison and judgment unit 27 judges that the current grinding current value is greater than the standard grinding current value, controlling the main roller drive mechanism 3 to reduce the speed.

[0087] The discharge control unit 29 is used to control the discharge mechanism 5 to change the discharge flow rate. Specifically, it controls the operation of the driver 57, causing the driver 57 to rotate the turntable 55 via the coupling 56 and the push rod 58, thereby causing the toggle member 54 to move and change the size of the milling opening between the rotating plate 52 and the outlet portion 51, thereby changing the discharge flow rate of each milling chamber. In this embodiment, the control actions of the discharge control unit 29 include: reducing the discharge flow rate when the comparison and judgment unit 27 determines that the current milling current value is less than the standard milling current value; and increasing the discharge flow rate when the comparison and judgment unit 27 determines that the current milling current value is greater than the standard milling current value.

[0088] The main control unit 30 is used to comprehensively control the work of the speed control unit 28 and the discharge control unit 29. In this embodiment, the current grinding current value reflects the motor load of the main roller drive mechanism 3 and is directly related to the degree of grain grinding. Therefore, the control of the speed by the speed control unit 28 and the control of the discharge flow by the discharge control unit 29 will affect the degree of grain grinding and the grinding current. Specifically, under the condition that other conditions remain unchanged, the higher the speed, the deeper the grain grinding degree and the greater the grinding current, and vice versa, the shallower the grain grinding degree and the smaller the grinding current; the greater the discharge flow, the shorter the residence time of the grain in the grinding chamber 151, the shallower the grinding degree and the smaller the grinding current, and vice versa, the deeper the grain grinding degree and the greater the grinding current.

[0089] The main control unit 30 of this embodiment adopts a method of first controlling the discharge and then controlling the rotational speed to make the milling current tend to the standard milling current value, so that the grains are always milled under the optimal milling current conditions. Specifically, when the comparison judgment unit 27 determines that the current milling current value is greater than or less than the standard milling current value, the discharge control unit 29 is first controlled to control the discharge flow rate (that is, increase or decrease the discharge flow rate, thereby reducing or increasing the current milling current value). If the standard milling current value is still not reached after a period of time (for example, 30s), the rotational speed control unit 28 is further controlled to control the rotational speed (that is, reduce or increase the rotational speed, thereby further reducing or increasing the current milling current value).

[0090] In addition, the main control unit 30 also controls the operation of other components and has the function of shutdown and emergency shutdown. Among them, shutdown means that the current grain has been milled. The state of completed milling can be detected by setting a detector at the bottom of the hopper. When the detector detects that all the grains in the hopper 2 have flowed out, it means that the milling is completed. At this time, the main control unit 30 controls the main roller drive mechanism 3 to shut down, and controls the discharging mechanism 5 to adjust the discharge flow rate to the maximum after a predetermined time (after the last grain is milled), so that all the grains in the milling chamber 15 can flow out. Emergency shutdown means that when the current milling current value is greater than the current milling current value threshold, the main roller drive mechanism 3 is controlled to shut down, and the discharging mechanism 5 is controlled to adjust the discharge flow rate to the maximum to allow all the grains in the milling chamber 15 to flow out, so that the operator can perform maintenance.

[0091] The working process of the automatic grinding device 100 of this embodiment is explained below with reference to the accompanying drawings.

[0092] Figure 10 FIG. 1 is a flow chart of the automatic grinding equipment according to the first embodiment of the present invention. Figure 10 As shown, when a batch of grains needs to be milled, the working process of the automatic milling equipment 100 of this embodiment is as follows.

[0093] In step S1, the input display unit 21 displays a milling variety selection screen to allow the operator to select one as the current milling variety, and then proceeds to step S2.

[0094] In step S2 , the retrieval unit 25 retrieves the current standard current value and the current milling current threshold value from the standard current value storage unit 22 and the milling current value threshold value storage unit 24 according to the current milling type selected by the operator, and then enters step S3 .

[0095] In step S3 , the main control unit 30 controls the main roller driving mechanism 3 to start working, and controls the grinding current value acquisition unit 26 to acquire the no-load current value, and then enters step S4 .

[0096] In step S4, the main control unit 30 controls the feed valve in the feed mechanism 4 to open, allowing the grains to flow into and fill each grinding chamber 15, and then enters step S5 after initial grinding for a certain time (for example, about 10 seconds).

[0097] In step S5 , the main control unit 30 controls the discharge mechanism 5 to open, allowing the ground grains to flow out at a certain discharge flow rate, and then enters step S6 .

[0098] In step S6 , the milling current value acquiring unit 26 acquires the current milling current value in real time, and then the process proceeds to step S7 .

[0099] In step S7 , the main control unit 30 determines whether the grain milling is completed. If it is determined that the grain milling is completed, the process proceeds to step S8 . If it is determined that the grain milling is not completed, the process proceeds to step S9 .

[0100] In step S8, the main control unit 30 controls the machine to be shut down and then enters the end state.

[0101] In step S9, the comparison judgment unit 27 judges the size relationship between the current grinding current value and the standard grinding current value. If it is judged to be greater than, it goes to step S10; if it is judged to be less than, it goes to step S11; if it is judged to be equal, it returns to step S6.

[0102] In step S10 , the main control unit 30 controls the discharge control unit 28 to control the discharge mechanism 5 to increase the discharge flow rate, and then enters step S12 .

[0103] In step S11 , the main control unit 30 controls the discharge control unit 29 to control the discharge mechanism 5 to reduce the discharge flow rate, and then enters step S13 .

[0104] In step S12, the grinding current value acquisition unit 26 reacquires the current grinding current value, and the comparison judgment unit 27 judges the size relationship between the current grinding current value and the standard grinding current value. When it is judged to be greater than, it enters step S14, and when it is judged to be less than or equal to, it returns to step S6.

[0105] In step S13, the grinding current value acquisition unit 26 reacquires the current grinding current value, and the comparison judgment unit 27 judges the size relationship between the current grinding current value and the standard grinding current value. When it is judged to be less than, it enters step S15, and when it is judged to be greater than or equal to, it returns to step S6.

[0106] In step S14, the main control unit 30 controls the rotation speed control unit 28 to control the main roller driving mechanism 3 to reduce the rotation speed, and then returns to step S6.

[0107] In step S15, the main control unit 30 controls the rotation speed control unit 28 to control the main roller driving mechanism 3 to increase the rotation speed, and then returns to step S6.

[0108] In addition, during the above process, the main control unit 30 determines in real time whether the current milling current is greater than the milling current threshold value, and if it is determined to be greater than the threshold value, an emergency shutdown is performed.

[0109] Example Function and Effect

[0110] According to the automatic grinding equipment provided by this embodiment, since the grinding current value acquisition part can obtain the current grinding current corresponding to the grain grinding degree, the comparison and judgment part can compare and judge the current grinding current with the standard grinding current value, and the speed control part can perform corresponding speed control according to the result of the comparison and judgment, it is possible to change the grinding degree by adjusting the speed when the grain grinding degree is too deep or insufficient, so that the grain can always be ground to the optimal degree.

[0111] In the embodiment, since the discharge control unit can also control the discharge flow rate according to the comparison and judgment results of the comparison and judgment unit, it can also change the residence time of the grain in the whitening chamber by adjusting the discharge flow rate, thereby changing the grinding degree, and can also allow the grain to always be ground to the optimal degree.

[0112] Furthermore, since the main control unit can control both the discharge control unit and the speed control unit, the two control mechanisms can work in coordination, so that the entire milling process can proceed reasonably. Of these two mechanisms, the inventors have found through experimental verification that the discharge control responds more quickly to the adjustment of the milling current value and the degree of grain milling, and the change trend fluctuates less and is more stable. The reason for this may be that the speed control is also subject to factors such as the coordination between the sand belt and the main drum. In this embodiment, since the main control unit first controls the discharge control unit, and the speed control unit is allowed to work when the discharge control unit cannot adjust the current milling current value to the optimal value within a certain period of time, it is equivalent to letting the mechanism that is faster and easier to adjust work first. Therefore, the milling current value can be better stabilized, that is, the degree of grain milling in the entire process is more stable and the grain quality is more consistent.

[0113] Furthermore, since the turntable and the toggle member are coordinated, one turntable can synchronously drive multiple toggle members, so that the grinding openings of each grinding chamber can be adjusted synchronously, and the discharge flow in each grinding chamber can be more effectively adjusted.

[0114] <Example 2>

[0115] In this embodiment, the same structures as those in the first embodiment are given the same numbers and the same descriptions are omitted.

[0116] This embodiment provides an automatic grain processing system composed of a plurality of different processing equipment connected in series, which include a plurality of automatic grinding equipment 400 for performing grinding, and other processing equipment for performing other grain processing procedures (including a grain shelling equipment arranged upstream of the automatic grinding equipment 400 and a polishing equipment arranged downstream of the automatic grinding equipment, not shown in the figure).

[0117] Figure 11 It is a structural block diagram of the automatic grinding equipment of Example 2 of the present invention.

[0118] like Figure 11 As shown, the main difference between the automatic grinding device 400 of this embodiment and the first embodiment is that the control device 20 further includes a production capacity acquisition unit 31 and a current production capacity setting unit 32.

[0119] The control device 20 is in communication with other automatic grinding devices 200 and other processing equipment to obtain the production capacity (i.e., the processing volume per unit time) of adjacent upstream and downstream processing equipment as the relevant production capacity. The automatic grinding device 200 generally has upstream equipment (which may be other automatic grinding devices 200 or grain shelling equipment) and downstream equipment (which may be other automatic grinding devices 200 or polishing equipment). The relevant production capacity includes the discharge flow rate of the upstream equipment and the feed flow rate of the downstream equipment. These discharge and feed flow rates can be detected by installing flow meters in the feed and discharge pipes of each device.

[0120] The current capacity setting unit 32 is used to set the current capacity range based on the relevant capacity. Specifically, the current capacity setting unit 32 selects the maximum of the upstream equipment discharge flow rate and the downstream equipment feed flow rate as the relevant maximum capacity, and the minimum of the relevant minimum capacity as the relevant minimum capacity. It then sets a value slightly smaller than the relevant maximum capacity as the maximum current capacity and a value slightly larger than the relevant minimum capacity as the minimum current capacity, thereby obtaining the current capacity range.

[0121] The control mechanism of the main control unit 30 in this embodiment is also different from that in the first embodiment. Specifically, in this embodiment, when the comparison and judgment unit 27 determines that the current milling current value is greater than the current standard milling current value, the main control unit 30 first controls the discharge control unit 29, causing the discharge control unit 29 to control the discharge mechanism 5 to increase the discharge flow rate. When the discharge flow rate is equal to the maximum current production capacity but the current milling current value is still greater than the current standard milling current value, the main control unit 30 controls the discharge control unit 29 to control the discharge mechanism 5 to maintain the discharge flow rate and controls the speed control unit 28 to control the main roller drive mechanism 3 to reduce the speed until the current milling current value is equal to the current standard milling current value. Similarly, when the comparison and judgment unit 27 determines that the current milling current value is less than the current standard milling current value, the main control unit 30 first controls the discharge control unit 29 to reduce the discharge flow rate. When the discharge flow rate is equal to the minimum current production capacity, the speed control unit 28 controls the main roller drive mechanism 3 to increase the speed until the current milling current value is equal to the current standard milling current value.

[0122] In this embodiment, since the automatic grinding equipment is also connected in series with other equipment, and the capacity acquisition part can obtain the relevant capacity of the upstream and downstream equipment, the current capacity setting part sets the current capacity range according to the relevant capacity, and when the grinding current value is greater than or less than the current standard grinding current value, the main control part first controls the discharge control part to change the discharge flow until the discharge flow reaches the upper limit or lower limit of the current capacity range, and then controls the speed control part to change the speed. Therefore, it can ensure that the capacity of the automatic grinding equipment always matches the upstream and downstream equipment, avoiding idling or piling caused by the mismatch of the capacity of adjacent equipment in the entire grain automatic processing system, so that the entire system can operate in an orderly and automatic manner.

[0123] The above embodiments are used to illustrate the protection scope of the present invention, but the protection scope of the present invention is not limited to the scope described in the above embodiments.

[0124] For example, in both Examples 1 and 2, a turntable and a toggle are used, with the driver driving the turntable to rotate, thereby driving the toggle to move, thereby changing the angle of the rotating plate and, consequently, the mill opening angle, to adjust the discharge flow rate. In the present invention, the mill chamber discharge assembly can also be simplified to a single electrically controlled valve (i.e., the angle of the rotating plate is changed by an electrically controlled servo, etc.). This eliminates the discharge adjustment assembly, with the processing control unit directly sending a corresponding electrical signal to the electrically controlled valve to change the angle of the electrically controlled valve, thereby changing the mill opening angle.

[0125] In the embodiment, the comparison judgment unit judges the current milling current value as approximately equal to, while the standard milling current value is a fixed value. In the present invention, the standard milling current value can also be directly stored in the form of a numerical range, and the range is not limited to ±5%, and can be a larger or smaller range.

[0126] In addition, in the second embodiment, the automatic grain processing system includes multiple automatic grinding devices connected in series. However, in the present invention, the automatic grain processing system may also include only one automatic grinding device, which is directly connected in series with other corresponding processing devices upstream and downstream.

Claims

1. An automatic grinding device for grinding grains, characterized in that: include: a milling device for milling the grains; as well as A control device for controlling the grinding process, The grinding equipment comprises a main drum, a main drum driving mechanism for driving the main drum to rotate, an abrasive belt driven by the main drum, a plurality of whitening chambers for accommodating the grains and cooperating with the abrasive belt to achieve grinding, and a discharge mechanism for discharging the grains after being ground in the whitening chambers. The main roller driving mechanism is a motor. The control device includes: a standard current value storage unit storing a plurality of milling types and preset standard milling current values ​​corresponding to the plurality of milling types; a screen storage unit storing a grinding type selection screen; An input display unit, which displays the milling type selection screen before starting the milling process to allow the operator to select the grain to be milled as the current milling type; a search and acquisition unit that searches the standard current value storage unit and acquires the milling type that matches the current milling type selected by the operator and the corresponding standard milling current value as the standard milling current value for the current milling process; a milling current value acquiring unit for continuously and in real time acquiring a current milling current value of the main roller driving mechanism during the milling process of the grain; a comparison and judgment unit, continuously judging the magnitude of the current grinding current value and the standard grinding current value; and The speed control unit is used to control the speed of the main roller drive mechanism during operation, including: controlling the main roller drive mechanism to increase the speed when the current grinding current value is less than the standard grinding current value, and controlling the main roller drive mechanism to reduce the speed when the current grinding current value is greater than the standard grinding current value.

2. The automatic grinding equipment according to claim 1, characterized in that: in, The control device further includes: The discharge control unit is used to control the discharge mechanism to change the discharge flow rate, including: reducing the discharge flow rate when the current grinding current value is less than the standard grinding current value, and increasing the discharge flow rate when the current grinding current value is greater than the standard grinding current value.

3. The automatic grinding equipment according to claim 2, characterized in that: in, The discharging mechanism comprises: A milling chamber discharge assembly comprises an outlet portion provided at the lower end of the milling chamber, a rotating plate rotatably mounted in the outlet portion, and a toggle member capable of driving the rotating plate to rotate; The discharge adjustment assembly comprises a turntable capable of pushing the toggle member to rotate so as to change the angle of the rotating plate, and a driving member for driving the turntable to rotate. The discharge control unit controls the driving member to drive the turntable to rotate, thereby changing the grinding opening angle between the rotating plate and the outlet portion, thereby changing the discharge flow rate.

4. The automatic grinding equipment according to claim 2, characterized in that: in, The discharging mechanism includes a plurality of discharging valves arranged at the lower end of the whitening chamber, and the discharging valves are electrically controlled valves. The discharge control unit changes the discharge flow rate by controlling the milling opening angle of the electric control valve.

5. The automatic grinding equipment according to claim 2, characterized in that: in, The control device further includes: Main control unit, When the comparison and judgment part determines that the current grinding current value is less than the standard grinding current value, the main control part first controls the discharge control part to reduce the discharge flow rate. After a predetermined time, when the comparison and judgment part still determines that the current grinding current value is less than the standard grinding current value, the main control part controls the speed control part to control the main roller drive mechanism to increase the speed. When the comparison and judgment part determines that the current grinding current value is greater than the standard grinding current value, the main control part first controls the discharge control part to increase the discharge flow rate. After a predetermined time, when the comparison and judgment part still determines that the current grinding current value is greater than the standard grinding current value, the main control part controls the speed control part to control the main roller drive mechanism to reduce the speed.

6. The automatic grinding equipment according to claim 2, characterized in that: in, The control device further includes: Main control unit, capacity acquisition unit and current capacity setting unit, The automatic grinding device is also connected in series with at least one other processing device. The capacity acquisition unit acquires the processing volume per unit time from at least one of the other processing devices as the relevant capacity, The current capacity setting unit sets a numerical range with a predetermined upper and lower limit difference from the relevant capacity as the current capacity range according to the relevant capacity. When the comparison and judgment unit determines that the current grinding current value is less than the standard grinding current value, the main control unit first controls the discharge control unit to reduce the discharge flow rate. After the discharge flow rate reaches the lower limit of the current production capacity range, when the comparison and judgment unit still determines that the current grinding current value is less than the standard grinding current value, the main control unit controls the speed control unit to control the main roller drive mechanism to increase the speed. When the comparison and judgment part determines that the current grinding current value is greater than the standard grinding current value, the main control part first controls the discharge control part to increase the discharge flow rate. After the discharge flow rate reaches the upper limit of the current production capacity range, when the comparison and judgment part still determines that the current grinding current value is greater than the standard grinding current value, it controls the speed control part to control the main roller drive mechanism to reduce the speed.

7. The automatic grinding equipment according to claim 1, characterized in that: in, The milling current value acquisition unit includes a no-load current value storage unit, a current current value acquisition unit, and a milling current value calculation unit. The current value acquisition unit acquires the current of the main roller driving mechanism when it is started at no-load as the no-load current value. The no-load current value storage unit stores the no-load current value. The current current value acquisition unit acquires the current operating current value of the main roller driving mechanism, The milling current value calculation unit subtracts the current working current value from the no-load current value to obtain the current milling current value.

8. An automatic grain processing system for processing grain including grinding, characterized in that: include: at least one automated milling plant and other processing equipment for grains other than milling, The automatic milling equipment is connected in series with the other processing equipment, and the automatic milling equipment is the automatic milling equipment according to any one of claims 1 to 7.

9. The automatic grain processing system according to claim 8, characterized in that: in, There are multiple automatic grinding devices, and the multiple automatic grinding devices are connected in series.

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