Product processing equipment and synchronous control method thereof

Abstract

The invention belongs to the technical field of product processing, and discloses product processing equipment and a synchronous control method thereof, and the product processing equipment comprises a plurality of conveying devices, a plurality of detection mechanisms and a controller; the multiple detection mechanisms and the multiple conveying devices are arranged in a one-to-one correspondence mode, and the multiple detection mechanisms are configured to detect the operation frequency of the corresponding conveying devices in real time; the controller is electrically connected with the conveying device and the detection mechanism and is configured to execute a synchronous control method. The operation frequency of the semi-finished product output by the first conveying device is used as the reference frequency, the difference value between the operation frequencies of the two adjacent conveying devices is compared in real time, and if the difference value between the operation frequencies of the two adjacent conveying devices exceeds the preset range, the operation frequency of the conveying device on the downstream side is dynamically corrected; therefore, the conveying synchronism of the semi-finished products among the stations is ensured, and the situation of accumulation or insufficient supply caused by mismatching of the conveying frequency is effectively avoided.

Description

Technical Field

[0001] This invention relates to the field of product processing technology, and in particular to a product processing equipment and its synchronous control method. Background Technology

[0002] In the food manufacturing process, dough undergoes multiple processing stations, sequentially completing processes such as rolling, cutting, frying, and cooling to gradually transform the raw material into dough strips, noodles, cakes, and finally finished products of uniform thickness. The entire process relies on conveyor systems located at different stations for connection and transfer. However, due to differences in the processing techniques at each stage, the load on each conveyor system varies, leading to fluctuations in the conveying frequency of the asynchronous motors in different systems. These fluctuations are difficult to maintain stability during the conveying process through manual real-time adjustment, easily resulting in the accumulation or insufficient supply of semi-finished products such as dough strips, noodles, and cakes between equipment. This not only affects product quality consistency but also wastes energy and raw materials.

[0003] Therefore, the above problems urgently need to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide a product processing equipment and its synchronous control method to improve the stability of each conveying device during the connection process and avoid the situation of accumulation or insufficient supply between adjacent devices.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] Synchronization control methods for product processing equipment include:

[0007] The operating frequency of the semi-finished products output by the first conveyor device is set as the reference frequency.

[0008] Real-time monitoring of the operating frequency of other conveying devices;

[0009] Along the conveying direction of the raw material, the operating frequencies of two adjacent conveying devices are compared, and it is determined whether the difference between the two is within a preset range;

[0010] If the difference exceeds the preset range, the operating frequency of the downstream conveying device is adjusted so that the difference between the two is within the preset range.

[0011] Preferably, comparing the operating frequencies of two adjacent conveying devices and determining whether the difference between them is within a preset range includes:

[0012] The difference between the operating cycles of the two conveying devices is used to determine whether the difference in their operating frequencies is within a preset range.

[0013] Preferably, the difference between the operating cycles of two adjacent conveying devices is in the range of [-50ms, 50ms].

[0014] Preferably, the step of correcting the operating frequency of the downstream conveying device if the frequency exceeds the preset range includes:

[0015] Based on the difference between the two, the required correction frequency for each conveying device is obtained through a PID algorithm.

[0016] Preferably, the range of the correction frequency is [-15Hz, 15Hz].

[0017] Product processing equipment, including:

[0018] Multiple conveying devices are located at different processing stations and are connected end to end to transport raw materials to different processing stations;

[0019] Multiple detection mechanisms are set up one-to-one with the multiple conveying devices and are configured to detect the operating frequency of the corresponding conveying devices in real time;

[0020] The controller is electrically connected to the conveying device and the detection mechanism and is configured to perform the synchronization control method as described in any one of claims 1-5.

[0021] Preferably, the conveying device includes an asynchronous motor, a driving wheel that is driven by the asynchronous motor, and a driven wheel that is driven by the driving wheel. The driving wheel and the driven wheel can form a conveying structure for conveying the raw materials.

[0022] Preferably, the detection mechanism is an encoder, which is coaxially arranged with the drive wheel.

[0023] Preferably, the testing institution includes:

[0024] A cam coaxially arranged with the drive wheel has a marking portion on it;

[0025] A proximity switch, facing the cam, is used to detect the time required for the marking part to rotate one revolution.

[0026] Preferably, the controller is a PLC controller.

[0027] The beneficial effects of this invention are:

[0028] The product processing equipment and its synchronous control method proposed in this invention use the operating frequency of the semi-finished product output by the first conveyor as the reference frequency, and compare the difference between the operating frequencies of two adjacent conveyors in real time. If the difference between the two operating frequencies exceeds a preset range, the operating frequency of the downstream conveyor is dynamically corrected to ensure the synchronicity of the semi-finished product conveyed between each workstation, effectively avoiding the situation of accumulation or insufficient supply due to mismatch in transportation frequencies. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the conveying device of the calender in this invention;

[0030] Figure 2 This is a schematic diagram of the cutting machine in this invention;

[0031] Figure 3 This is a schematic diagram of the structure of the fryer and the cooler in this invention;

[0032] Figure 4 yes Figure 3 Enlarged view of a portion of point A in the middle.

[0033] In the picture:

[0034] 10. Rolling mill; 20. Cutting machine; 30. Frying machine; 40. Cooling machine;

[0035] 1. Conveying device;

[0036] 2. Detection mechanism; 21. Cam; 22. Marking part; 23. Proximity switch. Detailed Implementation

[0037] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0038] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0041] Please see Figures 1 to 4 This embodiment proposes a product processing equipment, which includes multiple conveying devices 1 located at different processing stations and connected end-to-end to transport raw materials to different processing stations, thereby enabling the raw materials to be processed into semi-finished products and eventually into finished products. However, due to differences in the processing technology at each stage, the load borne by each conveying device 1 is inconsistent, resulting in differences in the operating frequency between adjacent conveying devices 1. This can easily lead to the accumulation of semi-finished products between the equipment or insufficient supply.

[0042] Based on the above, this embodiment also proposes a synchronous control method for product processing equipment, which includes the following steps:

[0043] The operating frequency of the semi-finished product output by the first conveyor device 1 is set as the reference frequency.

[0044] Real-time monitoring of the operating frequency of the remaining conveying device 1;

[0045] Along the direction of raw material conveying, the operating frequencies of two adjacent conveying devices 1 are compared, and it is determined whether the difference between the two is within a preset range.

[0046] If the difference exceeds the preset range, the operating frequency of the downstream conveying device 1 will be corrected so that the difference between the two is within the preset range.

[0047] It is understandable that the operating frequency of each conveying device 1 is detected, and the operating frequency of the semi-finished product output by the first conveying device 1 is used as the reference frequency. The operating frequencies of two adjacent conveying devices 1 are compared. If the difference between the two operating frequencies exceeds the preset range, the operating frequency of the downstream conveying device 1 is dynamically corrected until the difference between the two operating frequencies is within the preset range. This ensures the synchronicity of the semi-finished product conveying between each workstation and effectively avoids the situation of accumulation or insufficient supply due to mismatch in transportation frequency.

[0048] Each conveying device 1 includes an asynchronous motor, a driving wheel driven by the asynchronous motor, and a driven wheel driven by the driving wheel. The driving wheel and the driven wheel can form a conveying structure for conveying raw materials. It can be understood that the asynchronous motor can drive the driving wheel and the driven wheel to rotate, so as to receive the semi-finished product from the previous process and output it after conveying it to the processing station.

[0049] To ensure that each conveying device 1 can stably convey semi-finished products, in this embodiment, the product processing equipment also includes multiple detection mechanisms 2 and a controller. The multiple detection mechanisms 2 are set up one-to-one with the multiple conveying devices 1. Each detection mechanism 2 is configured to detect the operating frequency of the corresponding conveying device 1 in real time. The controller is electrically connected to the conveying device 1 and the detection mechanism 2 through a cable and is configured to execute the above-mentioned synchronous control method.

[0050] Understandably, during the processing, the detection mechanism 2 can detect the operating frequency of multiple conveying devices 1 in real time and send it to the controller. The controller can use the operating frequency of the semi-finished product output by the first conveying device 1 as the reference frequency, and compare the operating frequencies of two adjacent conveying devices 1 in sequence along the conveying direction of the raw materials. It can then determine whether the difference between the two is within a preset range. If it exceeds the preset range, the operating frequency of the downstream conveying device 1 is corrected so that the difference between the two is within the preset range. This ensures the synchronicity of the semi-finished product conveying between each station and effectively avoids the situation of accumulation or insufficient supply due to mismatch in transportation frequency.

[0051] Among them, the operating frequency of the semi-finished product output by the first conveying device 1 is used as the reference frequency, which enables the other conveying devices 1 to adapt to the reference frequency, that is, to adapt to the incoming material frequency, so as to further ensure the stability of the semi-finished product during transportation.

[0052] For example, dough is used as an example in this process. The dough is first rolled by a roller 10 to obtain a strip of uniform thickness. Then, a cutter 20 cuts the strip into noodles. The noodles are then fried in a fryer 30 to form flatbreads. Finally, the flatbreads are cooled in a cooler 40 to obtain the finished product. For ease of explanation, the conveying device 1 in the roller 10 is defined as the first conveying device, and the corresponding detection mechanism 2 is defined as the first detection mechanism. The conveying device 1 in the cutter 20 is defined as the second conveying device, and the corresponding detection mechanism 2 is defined as the second detection mechanism. The conveying device 1 in the fryer 30 is named the third conveying device, and the corresponding detection mechanism 2 is defined as the third detection mechanism. The conveying device 1 in the cooler 40 is named the fourth conveying device, and the corresponding detection mechanism 2 is defined as the fourth detection mechanism.

[0053] In the initial stage, each conveying device 1 operates at the same operating frequency.

[0054] When the rolling mill 10 rolls the dough, it allows the dough to pass through multiple sets of rolling rollers sequentially until it is pressed into a strip of uniform thickness before being output. Therefore, the operating frequency of the last set of rolling rollers is the operating frequency of the semi-finished product. That is, the last set of rolling rollers is the first conveying device. The last set of rolling rollers includes a pair of rollers, one of which acts as the driving roller and is connected to the asynchronous motor, and the other roller acts as the driven roller and is driven by the driving roller. The gap between the two rollers forms a conveying channel for the output of the strip. In addition, to ensure that the strip output by the first conveying device has a uniform thickness, the operating frequency of the first conveying device is usually a fixed value. That is, in some other feasible embodiments, it is not necessary to set up a first detection mechanism; it is only necessary to input the fixed value into the controller.

[0055] During the processing of dough strips, the interaction between the cutter and the dough strip increases the load on the second conveying device, which can easily lead to a deviation in the operating frequency between the second and first conveying devices. At this time, the controller can determine whether the deviation exceeds the preset range based on the detection values ​​of the first and second detection mechanisms. If it exceeds the preset range, the operating frequency of the second conveying device is corrected to ensure the stability of the semi-finished product between the first and second conveying devices.

[0056] During the processing of the shredded dough in the fryer 30, the conveying structure of the third conveying device needs to be immersed in the oil tank. At this time, the oil in the tank will adhere to the conveying structure, thereby increasing the load on the third conveying device. As the processing time continues to extend, the oil in the tank will gradually become viscous, further increasing the load on the third conveying device. This causes a deviation in the operating frequency between the third and second conveying devices. At this time, the controller can determine whether the deviation exceeds the preset range based on the detection values ​​of the second and third detection mechanisms. If it exceeds the preset range, the operating frequency of the third conveying device will be corrected to ensure the stability of the semi-finished product's operation between the second and third conveying devices.

[0057] During the processing of the dough, the cooler 40 can cool the fried dough. Since the expansion of the dough after frying is not constant, the friction between the dough and the fourth conveyor device will change, which can easily affect the load of the fourth conveyor device and cause a deviation in the operating frequency between the third and fourth conveyors. At this time, the controller can determine whether the deviation exceeds the preset range based on the detection values ​​of the third and fourth detection mechanisms. If it exceeds the preset range, the operating frequency of the fourth conveyor device will be corrected to ensure the stability of the semi-finished product in the operation between the fourth and third conveyors.

[0058] For the second, third, and fourth conveying devices, a conveyor belt is wound between the driving and driven wheels. The conveyor belt is made of a high-temperature resistant material, such as iron or stainless steel. The conveyor belt provides support for the dough strands, dough cakes, and finished products. Furthermore, the driving and driven wheels can be sprockets to prevent slippage during operation. After receiving the detected value, the controller can determine whether the difference in operating frequency between the two conveying devices 1 is within a preset range based on the difference in their operating cycles. This configuration allows for a direct reflection of the operating status of each conveying device 1 by judging its operating cycle.

[0059] Specifically, in this embodiment, the operating cycle of the conveying device 1 can be detected in the following two ways:

[0060] Firstly, the detection mechanism 2 is an encoder, which is coaxially mounted with the drive wheel. The encoder converts the mechanical rotation of the drive wheel into digital pulse signals to detect the operating cycle in real time and ensures detection accuracy.

[0061] Secondly, the detection mechanism 2 includes a cam 21 and a proximity switch 23. The cam 21 is coaxially arranged with the drive wheel, and a marking part 22 is provided on the cam 21. The proximity switch 23 is directly opposite the cam 21 and is used to detect the time required for the marking part 22 to rotate one revolution. It can be understood that when the cam 21 rotates with the drive wheel, the marking part 22 can rotate together, wherein the marking part 22 is preferably a protrusion. When the marking part 22 rotates to a position directly opposite the proximity switch 23, it can trigger the proximity switch 23. When the marking part 22 rotates to a position directly opposite the proximity switch 23 again, it can trigger the proximity switch 23 again. The interval between the two triggering actions is the rotation cycle of the drive wheel.

[0062] In some other feasible embodiments, the operating cycle of the drive wheel can also be detected in other ways, which will not be elaborated here.

[0063] Furthermore, when the controller obtains the difference between the operating cycles of two adjacent conveyor devices 1, it uses the following formula:

[0064] The difference is calculated as: the operating cycle of the downstream conveyor 1 minus the operating cycle of the upstream conveyor 1. If the difference is greater than 0, it proves that the operating cycle of the downstream conveyor 1 is greater than that of the upstream conveyor 1. If the difference is less than 0, it proves that the operating cycle of the downstream conveyor 1 is less than that of the upstream conveyor 1. If the difference is equal to 0, it proves that the operating cycle of the downstream conveyor 1 is equal to that of the upstream conveyor 1.

[0065] Furthermore, the preferred range for the difference between the operating cycles of two adjacent conveying devices 1 is [-50ms, 50ms]. After acquiring the above difference, the controller determines whether the difference is within [-50ms, 50ms]. If it is below -50ms, the controller reduces the rotation frequency of the corresponding asynchronous motor to reduce the speed of the drive wheel and increase its operating cycle, so that the difference is within [-50ms, 50ms]. If it is above 50ms, the controller increases the rotation frequency of the corresponding asynchronous motor to increase the speed of the drive wheel and reduce its operating cycle, so that the difference is within [-50ms, 50ms]. If it is within [-50ms, 50ms], no correction is required.

[0066] In this embodiment, the controller is a PLC controller with a built-in PID control module. Based on the difference between the operating cycles of two adjacent conveyor devices 1, the PLC controller obtains the required correction frequency for each conveyor device 1 through a PID algorithm. It can be understood that, based on the magnitude of the difference, the required correction frequency is calculated using the PID algorithm. After the correction frequency is determined, the controller can adjust the rotation frequency of the asynchronous motor accordingly.

[0067] The correction frequency range is [-15Hz, 15Hz]. This setting avoids system oscillation and adjustment overshoot caused by an excessively large correction range, thus ensuring the stability of the semi-finished product during transmission. If a single correction cannot bring the difference between the operating cycles of two adjacent conveying devices 1 to within [-50ms, 50ms], then another correction is required.

[0068] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A synchronous control method for product processing equipment, characterized in that, The product processing equipment includes multiple conveying devices (1), which are located at different processing stations and are connected end-to-end to transport raw materials to different processing stations; the synchronous control method includes: The operating frequency of the semi-finished product output by the first conveyor (1) is set as the reference frequency; Real-time monitoring of the operating frequency of the remaining conveying devices (1); Along the conveying direction of the raw material, the operating frequencies of two adjacent conveying devices (1) are compared, and it is determined whether the difference between the two is within a preset range; If the difference exceeds the preset range, the operating frequency of the downstream conveying device (1) is corrected so that the difference between the two is within the preset range.

2. The synchronous control method for product processing equipment according to claim 1, characterized in that, The step of comparing the operating frequencies of two adjacent conveying devices (1) and determining whether the difference between them is within a preset range includes: The difference between the operating cycles of the two conveying devices (1) is used to determine whether the difference in their operating frequencies is within a preset range.

3. The synchronous control method for product processing equipment according to claim 2, characterized in that, The range of the difference between the operating cycles of two adjacent conveying devices (1) is [-50ms, 50ms].

4. The synchronous control method for product processing equipment according to claim 1, characterized in that, If the operating frequency of the downstream conveying device (1) is exceeded, the correction includes: Based on the difference between the two, the required correction frequency for each conveying device (1) is obtained by using a PID algorithm.

5. The synchronous control method for product processing equipment according to claim 3, characterized in that, The range of the correction frequency is [-15Hz, 15Hz].

6. Product processing equipment, characterized in that, include: Multiple conveying devices (1) are located at different processing stations and are connected end to end to convey raw materials to different processing stations; Multiple detection mechanisms (2) are set up one-to-one with multiple conveying devices (1) and are configured to detect the operating frequency of the corresponding conveying device (1) in real time; The controller is electrically connected to the conveying device (1) and the detection mechanism (2) and is configured to perform the synchronization control method as described in any one of claims 1-5.

7. The product processing equipment according to claim 6, characterized in that, The conveying device (1) includes an asynchronous motor, a drive wheel that is driven by the asynchronous motor, and a driven wheel that is driven by the drive wheel. The drive wheel and the driven wheel can form a conveying structure for conveying the raw materials.

8. The product processing equipment according to claim 7, characterized in that, The detection mechanism (2) is an encoder, which is coaxially arranged with the drive wheel.

9. The product processing equipment according to claim 7, characterized in that, The testing organization (2) includes: A cam (21) is coaxially arranged with the drive wheel, and a marking part (22) is provided on the cam (21); A proximity switch (23) is positioned opposite the cam (21) and is used to detect the time required for the marker (22) to rotate one revolution.

10. The product processing equipment according to claim 6, characterized in that, The controller is a PLC controller.

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