Method for monitoring the roll gap between the grinding rollers of a flour mill

Abstract

A method for monitoring a roll gap between grinding rollers of a flour mill, comprising providing a control unit (30) and a roll gap adjustment mechanism (20). The control unit has a data collection module (301) and a memory processing module (302), in which an initial roll gap value is preset, and the roll gap adjustment mechanism includes at least an adjustment screw rod (201) and a position detection unit (21), in which the position detection unit detects a rotation change of the adjustment screw rod and transmits the position detection data to the data collection module, the data collection module converts the position detection data into a roll gap change value and transmits the roll gap change value to the memory processing module, and the memory processing module obtains a current roll gap value according to the initial roll gap value and the roll gap change value, and stores the roll gap change value and the current roll gap value in real time. In the monitoring method, the actual change of the roll gap between the grinding rollers can be monitored in real time, the roll gap change value and the current roll gap value are stored, and the stored data can be subjected to numerical analysis to optimize parameters of the flour mill.

Description

[Technical field]

[0001] The present invention relates generally to the technical field of flour mills, and more particularly to a method for monitoring the roll gap between the grinding rollers of a flour mill. [Background technology]

[0002] The flour mill is an important flour milling equipment, which usually consists of five components: a grinding roller, a feeding mechanism, a roll gap adjustment mechanism, a transmission mechanism, and a grinding roller cleaning mechanism.

[0003] The roll gap adjustment mechanism is a very important component of the flour mill. The adjustment of the roll gap is the movement of the two grinding rollers closer to each other or farther away from each other to change the distance between the two grinding rollers. Reducing the roll gap increases the grinding pressure applied to the material by the two grinding rollers, which can lengthen the grinding area, thereby increasing the number of grinding teeth, which makes the particle size of the material passed by the grinding rollers smaller, thereby increasing the grinding release and flour extraction rate. On the contrary, increasing the roll gap decreases the grinding release and flour extraction rate.

[0004] In the existing design, most roll gap adjustment mechanisms are manual adjustment mechanisms, in which the actual roll gap change value is only controlled by the roll gap gauge provided on the hand wheel, so that the technician cannot accurately know the exact roll gap value in real time, and it is difficult to ensure the stability of the milling quality and optimize the milling parameters. Summary of the Invention

[0005] The object of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a method for monitoring the roll gap between the grinding rollers of a flour mill, which can accurately reflect the actual change value of the roll gap.

[0006] The present invention provides the following technical solutions:

[0007] The method for monitoring the roll gap between the grinding rollers of a flour mill is as follows: providing a control unit and a roll gap adjustment mechanism; The control unit has a data collection module and a storage processing module, and the storage processing module is preset with an initial roll gap value; The roll gap adjustment mechanism includes at least an adjustment screw rod and a position detection unit, and the position detection unit detects a rotation change of the adjustment screw rod and transmits the position detection data to the data collection module; The data collection module converts the position detection data into a roll gap change value and sends the roll gap change value to the storage processing module, and the storage processing module obtains a current roll gap value according to the roll gap initial value and the roll gap change value, and stores the roll gap change value and the current roll gap value in real time.

[0008] According to the above technical idea, the present invention may further include any one or more of the following optional aspects.

[0009] In some optional forms, the control unit further comprises an input / output module that communicates with the storage module to set data in the storage module or read data from the storage module.

[0010] In some optional configurations, the input / output module includes a display, which displays the roll gap change value and the current roll gap value in real time.

[0011] In some optional configurations, the position detection unit detects the rotational changes of the adjusting screw rod during power on and power off of the mill.

[0012] In some optional embodiments, the monitoring method further includes measuring a wear value of each grinding roller after operation of the mill for each cycle, and setting the wear value in the memory processing module by the input / output module, so that the memory processing module obtains a corrected roll gap value according to the current roll gap value and the wear value.

[0013] In some optional configurations, the position sensing unit is mounted directly to an intermediate portion of the adjustment screw rod.

[0014] In some optional configurations, the position detection unit is connected to the adjustment screw rod by a belt transmission mechanism, which rotates synchronously with the adjustment screw rod.

[0015] In some optional configurations, the position sensing unit is provided at one of the two ends of the adjustment screw rod.

[0016] In some optional configurations, the position sensing unit is connected to the end of the adjustment screw rod by a direction changing coupler or a flexible shaft.

[0017] In some optional forms, the position sensing unit is connected to the adjustment screw rod by a nut that translates along the adjustment screw rod as the adjustment screw rod rotates.

[0018] In some optional embodiments, the position detection unit includes a sensing ring and a sensing arm, where the sensing ring rotates synchronously with the adjustment screw rod, and the sensing arm is used to detect the rotation of the sensing ring.

[0019] In the monitoring method of the present invention, the actual change in the roll gap between the grinding rollers of the flour mill can be monitored in real time, and the memory processing module stores the roll gap change value and the current roll gap value. The stored data can be subjected to numerical analysis to optimize the parameters of the flour mill, thereby facilitating the optimization of the flour milling process. [Brief description of the drawings]

[0020] Other features and advantages of the present invention will be better understood by the optional embodiments described in detail below with reference to the accompanying drawings, in which like reference numerals indicate the same or similar components, in which:

[0021] [Figure 1] FIG. 1 shows a schematic structural diagram of a flour mill according to an embodiment of the present invention. [Diagram 2] 2 shows the roll gap adjustment mechanism of FIG. 1, in which the roll gap adjustment mechanism includes a first embodiment of a position detection unit. [Diagram 3] 1 shows a roll gap adjustment mechanism including a position detection unit according to a second embodiment. [Figure 4] 1 shows a roll gap adjustment mechanism including a position detection unit according to embodiment 3. [Diagram 5] 1 shows a roll gap adjustment mechanism including a position detection unit according to embodiment 4. [Figure 6] 13 shows a roll gap adjustment mechanism including a position detection unit according to embodiment 5. [Figure 7] 13 shows a roll gap adjustment mechanism including embodiment 6 of the position detection unit. [Figure 8] 2 shows a schematic diagram of a control unit according to one embodiment of the present invention;

[0022] Those skilled in the art should understand that elements in the accompanying figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale For example, the dimensions of some of the elements in the accompanying figures may be exaggerated relative to other elements to help to enhance an understanding of the embodiments of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only a part, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive efforts shall be within the scope of protection of the present invention.

[0024] In this specification, the terms "first to sixth" are not used to define the order and number of components unless otherwise specified.

[0025] In an exemplary embodiment, as shown in FIG. 1, the flour mill 100 includes a floating grinding roller 12, a fixed grinding roller 14, and a roll gap adjustment mechanism 20. The roll gap adjustment mechanism 20 is connected to the floating grinding roller 12 by a transmission mechanism to adjust the roll gap between the floating grinding roller 12 and the fixed grinding roller 14. The transmission mechanism includes, for example, a connecting rod 16. Specifically, referring to FIG. 2, the connecting rod 16 is connected to an adjustment screw rod 201 of the roll gap adjustment mechanism 20. It should be understood that the transmission mechanism between the roll gap adjustment mechanism 20 and the floating grinding roller 12 can be any known transmission mechanism for converting the rotation of the adjustment screw rod 201 into the displacement of the floating grinding roller 12. Therefore, the rotation change amount of the adjustment screw rod 201 is directly correlated with the roll gap change value between the floating grinding roller 12 and the fixed grinding roller 14, and by using such a direct correlation, the present invention provides a position detection unit for the roll gap adjustment mechanism.

[0026] Specifically, in embodiment 1 shown in Fig. 2, the adjustment screw rod 201 of the roll gap adjustment mechanism 20 is driven by a hand wheel 202. The roll gap adjustment mechanism 20 is further provided with a first position detection unit 21, which is used to detect the rotation change of the adjustment screw rod 201.

[0027] The present invention provides a method for monitoring a roll gap by using a first position detection unit 21. In this method, a control unit 30 for the first position detection unit 21 is provided. Referring to FIG. 8, the control unit 30 has a data collection module 301 and a storage processing module 302. A roll gap initial value M1 is preset in the storage processing module 302. The first position detection unit 21 detects a rotation change of the adjustment screw rod 201 (for example, a positive rotation change amount or a negative rotation change amount of the rotation angle of the adjustment screw rod 201) and transmits the position detection data to the data collection module 301. The data collection module 301 converts the position detection data into a roll gap change value M2 (positive value or negative value) and transmits the roll gap change value M2 to the storage processing module 302. The memory processing module 302 obtains (calculates) a current roll gap value M3 according to the preset roll gap initial value M1 and the roll gap change value M2, where M3=M1+m2, and the memory processing module 302 stores the roll gap change value M2 and the current roll gap value M3 in real time.

[0028] In an optional embodiment, the control unit 30 further includes an input / output module 303, which communicates with the memory processing module 302 to set or read data of the memory processing module 302. In one aspect, the memory processing module 302 may be preset with a roll gap initial value M1 by the input / output module 303. The roll gap initial value M1 is determined when the mill is shipped from the factory, or is determined by a measuring means such as a gap gauge after the mill has been operated for each period. That is, the roll gap initial value M1 may be preset again by the input / output module 303. In another aspect, the input / output module 303 reads data of the memory processing module 302 in real time, which includes the roll gap change value M2 and the current roll gap value M3 stored by the memory processing module 302. Preferably, the input / output module 303 includes a display, which displays the roll gap change value M2 and the current roll gap value M3 read by the input / output module in real time. In this way, for example, when a technician manually drives and rotates the adjusting screw rod 201, he can intuitively know the magnitude of the roll gap value adjusted by the adjusting screw rod, and determine the magnitude of the coarse or fine adjustment performed by the adjusting screw rod. In addition, after the roll gap has been adjusted for a period of time, the history data in the memory processing module 302 is read by the input / output module 303, and the history data of the readings is subjected to numerical analysis to optimize the parameters of the flour mill, thereby further facilitating the optimization of the flour milling process.

[0029] In particular, the position detection unit detects the rotation change of the adjusting screw rod 201 during power-on and power-off of the mill 100. In other words, the memory processing module 302 of the control unit 30 stores the current roll gap value M3 before the mill is powered off. During power-off, a rotation change amount of the adjusting screw rod may be generated due to unintentional contact or intentional adjustment. Such a rotation change amount can be captured by the position detection unit. When the mill is powered on again, the data collection module 301 immediately receives the data generated by the position detection unit during power-off, converts the data into a roll gap change value, and transmits the roll gap change value to the memory processing module 302, so that the memory processing module 302 always stores the actual current roll gap value M3.

[0030] When the wear of the grinding roller is not taken into account, the roll gap monitoring method of the present invention can be considered to monitor the actual change value of the roll gap in real time. In a preferred embodiment, the rotation change amount of the adjusting screw rod is considered in combination with the wear amount of the grinding roller to obtain a more accurate actual change value of the roll gap. This is because each of the floating grinding roller 12 and the fixed grinding roller 14 includes a rotating shaft and a grinding body provided on the rotating shaft. The adjustment of the roll gap between the floating grinding roller 12 and the fixed grinding roller 14 is essentially the adjustment of the distance between the respective rotating shafts of the floating grinding roller 12 and the fixed grinding roller 14. When the wear of the grinding roller is taken into account, the change of the distance between each grinding body of the floating grinding roller 12 and the fixed grinding roller 14 can be considered to be equal to the change of the roll gap. However, the grinding roller will inevitably wear out after being used for a certain period of time. That is, the radius of each grinding body of the floating grinding roller 12 and the fixed grinding roller 14 will decrease to different degrees. In this case, the change in the distance between the respective grinding bodies should be taken into account by combining the change in the distance between the respective rotating shafts and the change in the radius of the respective grinding bodies.

[0031] In this regard, the roll gap monitoring method of the present disclosure further includes measuring the wear value of each grinding roller (including the floating grinding roller 12 and the fixed grinding roller 14) after the operation of the flour mill 100 for each cycle, so that the technician can set the wear value of each grinding roller in the memory processing module 302 by the input / output module 303 of the control unit 30 after the wear value of each grinding roller is obtained, and the memory processing module 302 obtains (calculates) a corrected roll gap value according to the current roll gap value and the wear value, and the corrected roll gap value is the actual roll gap value. According to the above-mentioned method for obtaining the current roll gap value, if the current roll gap value is M4, the roll gap change value detected by the position detection unit is M5 (positive value or negative value), the measured wear amount of the floating grinding roller 12 is M6 (negative value), and the measured wear amount of the fixed grinding roller 14 is M7 (negative value), the corrected roll gap value M8 is M4+M5-M6-M7.

[0032] Methods for measuring the wear value of each grinding roller include, but are not limited to, detection performed by a sensor, periodic detection performed by dedicated equipment, or estimation performed according to empirical values.

[0033] In an optional embodiment, Figures 3 to 7 respectively show a second position detection unit 22, a third position detection unit 23, a fourth position detection unit 24, a fifth position detection unit 25, and a sixth position detection unit 26 according to different embodiments.

[0034] In the second embodiment, referring to Fig. 3, the second position detection unit 22 is directly attached to the middle part of the adjustment screw rod, and the adjustment screw rod passes through the second position detection unit 22 and is connected to the hand wheel.

[0035] In embodiment 3, referring to Fig. 4, the third position detection unit 23 is connected to the adjusting screw rod by a belt transmission mechanism 231. The belt transmission mechanism rotates in synchronization with the adjusting screw rod to synchronize the rotation change of the adjusting screw rod with the third position detection unit 23.

[0036] In embodiment 1, referring again to FIG. 2, the first position detection unit 21 is provided directly on any one of the two ends of the adjusting screw rod. Specifically, one end of the adjusting screw rod is a driving end, and the other end is a driven end. The driving end is closer to the hand wheel or the motor. The driven end is closer to the transmission mechanism (e.g., the connecting rod 16) connected to the roll gap adjustment mechanism 20. In the embodiment of the present invention, the hand wheel and the first position detection unit 21 are provided on both sides of the adjusting screw rod, respectively. Further, in embodiment 4, referring to FIG. 5, the fourth position detection unit 24 is connected to the end of the adjusting screw rod by a flexible shaft 241. Alternatively, the fourth position detection unit 24 is connected to the end of the adjusting screw rod by a direction change coupler. Compared with providing the first position detection unit 21 directly on the end of the adjusting screw rod, the arrangement of the fourth position detection unit 24 provides a more flexible spatial layout to be adapted to the spatial arrangement inside the flour mill.

[0037] In embodiment 5, referring to Fig. 6, the fifth position detection unit 25 is connected to the adjusting screw rod by a nut 251. The nut 251 translates along the adjusting screw rod as the adjusting screw rod rotates. The fifth position detection unit 25 detects the translational movement change of the nut 251 to detect the rotational change of the adjusting screw rod.

[0038] 7, in embodiment 6, the sixth position detection unit 26 includes a detection ring 261 and a detection arm 262. The detection ring 261 rotates synchronously with the adjustment screw rod, and the detection arm 262 is used to detect the rotation of the detection ring 261.

[0039] Although different types of position detection units are disclosed above, the present invention is not limited to the position detection units in a specific embodiment. It should be understood that the position detection units include, but are not limited to, encoders, displacement sensors, laser distance measuring devices, ultrasonic sensors, and photoelectric switches. Different types of position detection units with different adaptive mechanical structures can be selected according to the overall considerations of space layout constraints, installation difficulties, cost control, etc.

[0040] In the embodiment of the present invention, an adjusting screw rod driven by a hand wheel is described, and the position detection unit arrangement is also applicable to an adjusting screw rod driven by a motor. Regardless of whether the adjusting screw rod is driven by a hand wheel or a motor, the present invention provides a position detection unit directly or indirectly connected to the adjusting screw rod, which can be used when manufacturing a new mill, and can also be used when upgrading an existing mill.

[0041] While the embodiments illustrated in the drawings merely illustrate optional shapes, sizes, and arrangements of each optional component of the product of the present invention, it should be understood that these are merely exemplary and not limiting, and that other shapes, sizes, and arrangements may be employed without departing from the spirit and scope of the present invention.

[0042] Although the technical contents and technical features of the present invention have been disclosed above, it should be understood that those skilled in the art can make various changes and improvements to the above-disclosed concepts under the inventive concept of the present invention, all of which are within the scope of protection of the present invention. The above description of the embodiments is illustrative rather than restrictive, and the scope of protection of the present invention is defined by the claims.

Claims

1. 1. A method for monitoring a roll gap between grinding rollers of a flour mill, comprising the steps of: The present invention is characterized in that it includes providing a control unit and a roll gap adjustment mechanism, The control unit has a data collection module and a storage processing module, and an initial roll gap value is preset in the storage processing module; The roll gap adjustment mechanism includes at least an adjustment screw rod and a position detection unit, and the position detection unit detects a rotation change of the adjustment screw rod and transmits position detection data to the data collection module; A method for monitoring a roll gap between grinding rollers of a flour mill, the method comprising: the data collection module converting the position detection data into a roll gap change value and transmitting the roll gap change value to the storage processing module; the storage processing module obtaining a current roll gap value according to the roll gap initial value and the roll gap change value, and storing the roll gap change value and the current roll gap value in real time.

2. 2. The method for monitoring the roll gap between the grinding rollers of a flour mill according to claim 1, wherein the control unit further comprises an input / output module, the input / output module communicating with the memory processing module to set data in the memory processing module or to read the data in the memory processing module.

3. 3. The method for monitoring the roll gap between the grinding rollers of a flour mill as claimed in claim 2, wherein the input / output module includes a display, the display displaying the roll gap change value and the current roll gap value in real time.

4. 2. The method for monitoring the roll gap between the grinding rollers of a flour mill as claimed in claim 1, wherein the position detection unit detects the rotational change of the adjusting screw rod and the adjusting screw rod while the flour mill is powered on and off.

5. 3. The method for monitoring the roll gap between the grinding rollers of a flour mill as described in claim 2, further comprising: measuring a wear value of each grinding roller after the operation of the flour mill for each cycle; and setting the wear value in the memory processing module by the input / output module, so that the memory processing module obtains a corrected roll gap value according to the current roll gap value and the wear value.

6. The method for monitoring the roll gap between the grinding rollers of a flour mill according to any one of claims 1 to 5, wherein the position detection unit is directly attached to an intermediate portion of the adjusting screw rod.

7. The method for monitoring the roll gap between the grinding rollers of a flour mill according to any one of claims 1 to 5, wherein the position detection unit is connected to the adjusting screw rod by a belt transmission mechanism, and the belt transmission mechanism rotates synchronously with the adjusting screw rod.

8. The method for monitoring the roll gap between the grinding rollers of a flour mill according to any one of claims 1 to 5, wherein the position detection unit is provided at either one of the two ends of the adjusting screw rod.

9. 9. The method for monitoring the roll gap between the grinding rollers of a flour mill as claimed in claim 8, wherein the position detection unit is connected to the end of the adjusting screw rod by a direction change coupler or a flexible shaft.

10. 6. The method for monitoring the roll gap between the grinding rollers of a flour mill according to claim 1, wherein the position detection unit is connected to the adjusting screw rod by a nut, the nut translating along the adjusting screw rod as the adjusting screw rod rotates.

11. The method for monitoring the roll gap between the grinding rollers of a flour mill according to any one of claims 1 to 5, wherein the position detection unit comprises a detection ring and a detection arm, the detection ring rotates synchronously with the adjustment screw rod, and the detection arm is used to detect the rotation of the detection ring.

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