Method for monitoring the roll gap between grinding rollers in 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

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

Background Art

[0002] A flour mill is an important flour-making device, and usually consists of five components, namely, grinding rollers, a feeding mechanism, a roll gap adjusting mechanism, a transmission mechanism, and a grinding roller cleaning mechanism.

[0003] The roll gap adjusting mechanism is a very important component of a flour mill. Adjusting the roll gap is a movement to move two grinding rollers closer to or farther from each other to change the distance between the two grinding rollers. When the roll gap is decreased, the grinding pressure applied to the material by the two grinding rollers increases, the grinding area can be lengthened, thereby increasing the number of crushing teeth, reducing the particle size of the material passed through by the grinding rollers, and increasing the crushing discharge and flour extraction rate. Conversely, when the roll gap is increased, the crushing discharge and flour extraction rate decrease.

[0004] In existing designs, most roll gap adjusting mechanisms are manual adjusting mechanisms. In the case of a manual adjusting mechanism, the actual roll gap change value is only controlled by the roll gap gauge provided on the handwheel, so that technicians cannot accurately know the exact roll gap value in real time, and it is also difficult to ensure the stability of flour-making quality and optimize flour-making parameters.

Summary of the Invention

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

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

[0007] A method for monitoring the roll gap between the grinding rollers of a flour mill is: This includes providing a control unit and a roll gap adjustment mechanism. The control unit comprises a data acquisition module and a memory processing module, the memory processing module having a preset roll gap initial value. The roll gap adjustment mechanism comprises at least an adjustment screw rod and a position detection unit, the position detection unit detects changes in the rotation of the adjustment screw rod and transmits the position detection data to a data acquisition module. The data acquisition module converts the position detection data into roll gap change values, transmits the roll gap change values ​​to the storage processing module, and retrieves the 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.

[0008] According to the technical concept described above, the present invention may further include one or more of the following optional forms.

[0009] In some optional configurations, the control unit further includes input / output modules, which communicate with a memory processing module to set data in the memory processing module or read data from the memory processing module.

[0010] In some optional configurations, the input / output module is equipped with a display that shows the roll gap change and the current roll gap value in real time.

[0011] In some optional configurations, the position detection unit detects changes in the rotation of the adjustment screw rod while the mill is powered on and powered off.

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

[0013] In some optional configurations, the position detection unit is directly mounted on the middle section of the adjustment screw rod.

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

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

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

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

[0018] In some optional configurations, the position detection unit comprises a detection ring and a detection arm, the detection ring rotating in sync with an adjustment screw rod, and the detection arm being used to detect the rotation of the detection 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 from the optional embodiments described in detail below with reference to the accompanying drawings, in which the same reference numerals indicate the same or similar components. In the accompanying drawings,

[0021] [Figure 1] Shows a schematic structural diagram of a flour mill according to an embodiment of the present invention. [Figure 2] Shows the roll gap adjustment mechanism of FIG. 1, including Embodiment 1 of the position detection unit. [Figure 3] Shows a roll gap adjustment mechanism including Embodiment 2 of the position detection unit. [Figure 4] Shows a roll gap adjustment mechanism including Embodiment 3 of the position detection unit. [Figure 5] Shows a roll gap adjustment mechanism including Embodiment 4 of the position detection unit. [Figure 6] Shows a roll gap adjustment mechanism including Embodiment 5 of the position detection unit. [Figure 7] Shows a roll gap adjustment mechanism including Embodiment 6 of the position detection unit. [Figure 8] Shows a schematic diagram of a control unit according to an embodiment of the present invention.

[0022] Those skilled in the art should understand that the elements in the accompanying drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the dimensions of some elements in the accompanying drawings may be exaggerated relative to other elements to facilitate understanding of the embodiments of the present disclosure.

Embodiments for Carrying Out the Invention

[0023] 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 of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative 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] [[ID=I4]] 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 adjusting mechanism 20. The roll gap adjusting 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 the adjusting screw rod 201 of the roll gap adjusting mechanism 20. It should be understood that the transmission mechanism between the roll gap adjusting mechanism 20 and the floating grinding roller 12 can be any known transmission mechanism for converting the rotation of the adjusting screw rod 201 into the displacement of the floating grinding roller 12. Therefore, the rotational change amount of the adjusting 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 adjusting mechanism. [[ID=I6]]

[0026] Specifically, in Embodiment 1 shown in Figure 2, the adjustment screw rod 201 of the roll gap adjustment mechanism 20 is driven by a handwheel 202. The roll gap adjustment mechanism 20 is further provided with a first position detection unit 21 used to detect changes in the rotation 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 Figure 8, the control unit 30 includes a data acquisition module 301 and a memory processing module 302. The memory processing module 302 is preset with an initial roll gap value M1. The first position detection unit 21 detects the rotational change of the adjustment screw rod 201 (for example, a positive or negative rotational change in the rotation angle of the adjustment screw rod 201) and transmits the position detection data to the data acquisition module 301. The data acquisition module 301 converts the position detection data into a roll gap change value M2 (positive or negative value) and transmits the roll gap change value M2 to the memory processing module 302. The memory processing module 302 obtains (calculates) the current roll gap value M3 according to the preset initial roll gap value M1 and roll gap change value M2, where M3 = M1 + m2. The memory processing module 302 also 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 a memory processing module 302 to set or read data from the memory processing module 302. In one embodiment, the memory processing module 302 may be preset by the input / output module 303 with an initial roll gap value M1. The initial roll gap value M1 is determined at the time of factory shipment of the milling machine or after the milling machine has been operated over each period by a measuring means such as a gap gauge. That is, the initial roll gap value M1 may be preset again by the input / output module 303. In another embodiment, the input / output module 303 reads data from the memory processing module 302 in real time, which includes a roll gap change value M2 and a current roll gap value M3 stored by the memory processing module 302. Preferably, the input / output module 303 includes a display that 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, by manually driving and rotating the adjustment screw rod 201, for example, an engineer can intuitively know the magnitude of the roll gap adjusted by the adjustment screw rod and determine the magnitude of the coarse or fine adjustment performed by the adjustment screw rod. In addition, after the roll gap has been adjusted over a period of time, the input / output module 303 reads the history data from the memory processing module 302, and the history data of the read values ​​is subjected to numerical analysis to optimize the parameters of the milling machine, thereby further facilitating the optimization of the milling process.

[0029] In particular, the position detection unit detects changes in the rotation of the adjustment screw rod 201 while the flour mill 100 is powered on and powered off. In other words, the memory processing module 302 of the control unit 30 stores the current roll gap value M3 before the flour mill is powered off. While the power is off, changes in the rotation of the adjustment screw rod may be generated due to unintended contact or intentional adjustment. Such changes in rotation can be captured by the position detection unit. When the flour mill is powered on again, the data acquisition module 301 immediately receives the data generated by the position detection unit while the power was off, converts that data into a roll gap change value, and transmits that 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] If wear of the grinding rollers is not considered, the roll gap monitoring method of the present invention can be considered to monitor the actual change in the roll gap in real time. In a preferred embodiment, a more accurate actual change in the roll gap is obtained by considering the amount of rotational change of the adjustment screw rod in combination with the amount of wear of the grinding rollers. This is because each of the floating grinding rollers 12 and the fixed grinding rollers 14 includes a rotating shaft and a grinding material supplied to the rotating shaft. Adjusting the roll gap between the floating grinding rollers 12 and the fixed grinding rollers 14 is essentially an adjustment of the distance between the respective rotating shafts of the floating grinding rollers 12 and the fixed grinding rollers 14. If wear of the grinding rollers is considered, it can be considered that the change in the distance between each grinding material of the floating grinding rollers 12 and the fixed grinding rollers 14 is equal to the change in the roll gap. However, after a certain period of use, the grinding rollers inevitably wear down. That is, the radius of each grinding material of the floating grinding rollers 12 and the fixed grinding rollers 14 decreases to different degrees. In this case, the change in distance between each pulverizer should be considered by combining the change in distance between each rotating shaft and the change in the radius of each pulverizer.

[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 grinding machine 100 for each cycle, thereby allowing the technician to set the wear value of each grinding roller in the memory processing module 302 via the input / output module 303 of the control unit 30 after the wear value of each grinding roller has been obtained, and the memory processing module 302 obtains (calculates) a corrected roll gap value according to the current roll gap value and wear value, and the corrected roll gap value is the actual roll gap value. According to the above 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 or negative), the measured wear amount of the floating grinding roller 12 is M6 (negative), and the measured wear amount of the fixed grinding roller 14 is M7 (negative), then 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 sensors, periodic detection performed by specialized equipment, or estimation performed according to empirical values.

[0033] In optional embodiments, Figures 3 to 7 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, respectively.

[0034] In Embodiment 2, referring to Figure 3, the second position detection unit 22 is directly attached to the middle portion of the adjustment screw rod. Furthermore, the adjustment screw rod passes through the second position detection unit 22 and is connected to the handwheel.

[0035] In Embodiment 3, referring to Figure 4, the third position detection unit 23 is connected to the adjustment screw rod by a belt transmission mechanism 231. The belt transmission mechanism rotates in sync with the adjustment screw rod, synchronizing the rotational changes of the adjustment screw rod with those of the third position detection unit 23.

[0036] In Embodiment 1, referring again to Figure 2, the first position detection unit 21 is directly supplied to one of the two ends of the adjustment screw rod. Specifically, one end of the adjustment screw rod is the drive end and the other end is the driven end. The drive end is closer to the handwheel or motor. The following end is closer to the transmission mechanism (e.g., connecting rod 16) connected to the roll gap adjustment mechanism 20. In embodiments of the present invention, the handwheel and the first position detection unit 21 are supplied on both sides of the adjustment screw rod, respectively. Furthermore, in Embodiment 4, referring again to Figure 5, the fourth position detection unit 24 is connected to the end of the adjustment screw rod by a flexible shaft 241. Alternatively, the fourth position detection unit 24 is connected to the end of the adjustment screw rod by a direction change coupler. Compared to supplying the first position detection unit 21 directly to the end of the adjustment 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 mill.

[0037] In Embodiment 5, referring to Figure 6, the fifth position detection unit 25 is connected to the adjustment screw rod by a nut 251. The nut 251 translates along the adjustment screw rod as the adjustment screw rod rotates. The fifth position detection unit 25 detects the change in the translational movement of the nut 251 and thereby detects the change in the rotation of the adjustment screw rod.

[0038] In Embodiment 6, referring to Figure 7, the sixth position detection unit 26 includes a detection ring 261 and a detection arm 262. The detection ring 261 rotates in sync with an 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 position detection units in any particular embodiment. Examples of position detection units include, but are not limited to, encoders, displacement sensors, laser rangefinders, ultrasonic sensors, and photoelectric switches. Different types of position detection units with different adaptive mechanical structures may be selected according to a comprehensive consideration of spatial layout constraints, installation difficulties, cost control, and the like.

[0040] In embodiments of the present invention, an adjustment screw rod driven by a handwheel is described, and the arrangement of its position detection unit is also applicable to an adjustment screw rod driven by a motor. Whether the adjustment screw rod is driven by a handwheel or a motor, the present invention provides a position detection unit directly or indirectly connected to the adjustment screw rod, which can be used when manufacturing new milling machines, and furthermore, when upgrading milling machines that are already in use.

[0041] The embodiments shown in the drawings merely illustrate optional shapes, sizes, and arrangements of any optional components of the product of the present invention. These are not limiting but merely illustrative, and it should be understood that other shapes, sizes, and arrangements may be adopted without departing from the spirit and scope of the invention.

[0042] While the technical content and features of the present invention have been disclosed above, those skilled in the art should understand that various modifications and improvements can be made to the concepts disclosed above under the inventive concept of the present invention, all of which fall within the scope of protection of the present invention. The above description of embodiments is illustrative and not limiting, and the scope of protection of the present invention is defined by the claims.

Claims

1. A method for monitoring the roll gap between the grinding rollers of a flour mill, The invention is characterized by including a control unit and a roll gap adjustment mechanism, The control unit comprises a data acquisition module and a storage processing module, and the storage processing module has a preset roll gap initial value. The roll gap adjustment mechanism comprises at least an adjustment screw rod and a position detection unit, the position detection unit detects changes in the rotation of the adjustment screw rod and transmits the position detection data to the data acquisition module. The data acquisition module converts the position detection data into roll gap change values, A method for monitoring the roll gap between grinding rollers of a flour mill, comprising: transmitting the roll gap change value to the memory processing module; the memory processing module obtaining the current roll gap value according to the initial roll gap value and the roll gap change value; and storing the roll gap change value and the current roll gap value in real time.

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

3. The method for monitoring the roll gap between grinding rollers of a milling machine according to claim 2, wherein the input / output module includes a display, and the display displays the roll gap change value and the current roll gap value in real time.

4. The method for monitoring the roll gap between the grinding rollers of a flour mill according to claim 1, wherein the position detection unit detects the change in rotation of the adjustment screw rod while the flour mill is powered on and powered off.

5. A method for monitoring the roll gap between grinding rollers of a grinding mill according to claim 2, further comprising measuring the wear value of each grinding roller after the operation of the grinding 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. A method for monitoring the roll gap between grinding rollers of a flour mill according to any one of claims 1 to 5, wherein the position detection unit is directly attached to the intermediate portion of the adjustment screw rod.

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

8. A method for monitoring the roll gap between grinding rollers of a milling machine according to any one of claims 1 to 5, wherein the position detection unit is provided at one of the two ends of the adjustment screw rod.

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

10. A method for monitoring the roll gap between grinding rollers of a flour mill according to any one of claims 1 to 5, wherein the position detection unit is connected to the adjustment screw rod by a nut, and the nut translates along the adjustment screw rod as the adjustment screw rod rotates.

11. A method for monitoring the roll gap between 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 in synchronization with the adjustment screw rod, and the detection arm is used to detect the rotation of the detection ring.

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