Beer bottle cold end spraying mixed liquid preparation method and system and spraying equipment

Abstract

The invention relates to the technical field of spraying, in particular to a beer bottle cold end spraying mixed liquid preparation method and system and spraying equipment. Tap water is conveyed through the first metering pump to obtain tap water flow data, spraying liquid is conveyed through the second metering pump according to the tap water flow data and the preset mixing proportion to obtain spraying liquid flow data, and the liquid output state of the first metering pump and the liquid output state of the second metering pump are monitored in real time. When any one of the first metering pump and the second metering pump detects that no liquid is output, an alarm signal is sent to the PLC; and finally, tap water flow data, spraying liquid flow data and a mixing ratio are displayed in real time through a human-computer interface. Automatic and accurate spraying liquid preparation is achieved, meanwhile, real-time monitoring and automatic alarm functions are achieved, and production safety is improved.

Description

Technical Field

[0001] The present application relates to the technical field of spraying, and in particular to a method, system and spraying equipment for preparing a mixed liquid for cold-end spraying of beer bottles. Background Art

[0002] During the production process of beer bottles, water-soluble lubricants need to be sprayed on the cold end area to reduce friction between the bottle bodies and prevent scratches and bottle tipping. Cold end spraying is a key process in the beer filling production line. The concentration of the spraying liquid directly affects the product appearance quality and the production line operation efficiency. At present, the cold end spray liquid is generally prepared by manual configuration or simple mechanical metering on the beer bottle production line. The mixed spray liquid is transported to the nozzle through the pipeline and evenly sprayed on the surface of the beer bottle; in the existing technology, once the frequency of the delivery pump is set, it is difficult to adjust according to the actual situation, and the abnormal condition of the delivery pump cannot be discovered in time, which easily causes the concentration of the spray liquid to be unstable or the spraying to be interrupted, affecting the normal operation of the production line. Summary of the invention

[0003] In order to solve the problem that the existing cold end spraying is difficult to adjust according to the actual situation, the present application provides a method, system and spraying equipment for cold end spraying of beer bottles, which adopts the following technical solutions: In a first aspect, the present application provides a method for preparing a mixed liquid for cold-end spraying of a beer bottle, comprising the following steps: The tap water is delivered by a first metering pump to obtain tap water flow data; According to the tap water flow data and the preset mixing ratio, the spray liquid is delivered by a second metering pump to obtain the spray liquid flow data; Monitor the liquid output status of the first metering pump and the second metering pump in real time, and send an alarm signal to the PLC controller when either the first metering pump or the second metering pump detects that there is no liquid output; The tap water flow data, the spray liquid flow data and the mixing ratio are displayed in real time through a human-machine interface.

[0004] By adopting the above technical scheme, manual configuration is prone to errors, resulting in unstable concentration of the spray liquid; secondly, the mechanical metering device lacks real-time monitoring and automatic adjustment functions, and is unable to detect and handle abnormal situations in a timely manner; the present application first delivers tap water through a first metering pump to obtain tap water flow data, and according to the tap water flow data and a preset mixing ratio, delivers the spray liquid through a second metering pump to obtain spray liquid flow data, and monitors the liquid output status of the first metering pump and the second metering pump in real time. When either the first metering pump or the second metering pump detects that there is no liquid output, an alarm signal is sent to the PLC controller; finally, the tap water flow data, the spray liquid flow data and the mixing ratio are displayed in real time through the human-machine interface; the automation and precision of the spray liquid configuration are realized, and at the same time, the real-time monitoring and automatic alarm functions are provided, thereby improving production safety.

[0005] Optionally, the tap water is delivered by a first metering pump to obtain tap water flow data, which specifically includes the following steps: According to a preset production speed, setting the delivery flow rate of the first metering pump; Collecting real-time flow data of the first metering pump to obtain tap water flow data; The tap water flow data is transmitted to the PLC controller.

[0006] By adopting the above technical scheme, since the production speed of the beer bottle production line often needs to be dynamically adjusted, the traditional cold-end spray liquid configuration system cannot achieve accurate control and real-time tracking of the tap water flow. The present application first automatically sets the target flow of the first metering pump according to the current production line speed using a preset calculation model, and then collects the actual output flow of the pump in real time through a high-precision flow sensor to obtain accurate tap water flow data, and finally transmits these data in real time to the PLC controller for processing and adjustment; the system adaptability is improved, and the ratio accuracy is ensured through real-time flow monitoring and data transmission.

[0007] Optionally, the step of delivering the spray liquid by a second metering pump according to the tap water flow data and a preset mixing ratio specifically includes the following steps: Calculating a target flow rate of the spraying liquid according to the tap water flow rate data and a preset mixing ratio; setting the delivery flow rate of the second metering pump according to the target flow rate; Collecting real-time flow data of the second metering pump to obtain spray liquid flow data; The spraying liquid flow data is transmitted to the PLC controller.

[0008] By adopting the above technical solution, the system first calculates the target flow rate of the spray liquid accurately through an intelligent algorithm based on the real-time collected tap water flow data and the preset mixing ratio, and then converts the calculated target value into the control parameter of the second metering pump to achieve precise delivery; at the same time, the actual delivery volume is continuously monitored through a high-precision flow sensor, and the data is fed back to the PLC controller in real time for dynamic adjustment; this can automatically compensate and effectively cope with fluctuations in tap water flow.

[0009] Optionally, a transparent detection tube section is provided at the outlet end of the mixed liquid, and a light emitting diode array and a photoelectric induction sensor array are respectively provided on both sides of the detection tube section; Collecting light transmission data of the mixed liquid by means of the photoelectric sensing sensor array; Comparing the light transmission data with a preset calibration curve to obtain the actual concentration of the mixed solution; When the actual concentration deviates from the preset range, a delivery flow adjustment signal is sent to the PLC controller.

[0010] By adopting the above-mentioned technical scheme, the present application sets a transparent detection tube section at the outlet end of the mixed liquid, combines the light-emitting diode array and the photoelectric sensor array, and uses the light transmission characteristics of the mixed liquid to measure the concentration: the light-emitting diode array emits light of a specific wavelength, which is received by the photoelectric sensor array on the opposite side after passing through the mixed liquid. The actual concentration of the mixed liquid is determined by measuring the change in light transmission intensity. When the actual concentration deviates from the preset range, a delivery flow adjustment signal is sent to the PLC controller; no manual sampling is required, and automatic correction can be achieved to ensure that the concentration of the spraying liquid always remains in the optimal range.

[0011] Optionally, collecting light transmission data of the mixed liquid by the photoelectric sensor array specifically includes the following steps: Continuously collecting multiple sets of light transmission data according to a preset sampling period; Eliminating the maximum value and the minimum value among the plurality of sets of light transmission data; The remaining data are averaged to obtain the effective light transmission data.

[0012] By adopting the above technical solution, the present application first continuously collects multiple groups of data according to the optimized sampling period to form a complete data sequence; then removes the maximum and minimum data points that may be affected by abnormal interference by removing extreme values; finally, the remaining valid data is arithmetic averaged to obtain more representative light transmission data, thereby improving the accuracy of the data and reducing interference from abnormal data.

[0013] Optionally, when the actual concentration deviates from a preset range, a flow rate adjustment signal is sent to the PLC controller, which specifically includes the following steps: When the actual concentration is higher than the upper limit of the preset range, an adjustment signal is sent to the PLC controller to increase the flow rate of the first metering pump; When the actual concentration is lower than the lower limit of the preset range, an adjustment signal is sent to the PLC controller to increase the flow rate of the second metering pump; The delivery flow rate of the corresponding metering pump is gradually adjusted according to the preset adjustment step until the actual concentration returns to the preset range.

[0014] By adopting the above technical solution, in actual production, large-scale adjustments often cause over-adjustment or under-adjustment of concentration. For example, when a brewery detects that the concentration is too high, the system directly increases the tap water flow by 20%, causing the concentration to drop sharply, and then needs to be adjusted in the opposite direction, forming oscillations, so that the system takes a long time to stabilize within the target range; the present application adopts a preset adjustment step for progressive adjustment, which improves the stability of the system.

[0015] Optionally, the method further comprises the following steps: A temperature sensor is arranged at the position of the detection pipe section to collect the temperature data of the mixed liquid in real time; Matching the mixed liquid temperature data with a preset temperature compensation curve; Performing compensation correction on the light transmission data according to the matching result; When the temperature of the mixed liquid exceeds a preset range, a temperature abnormality signal is sent to the PLC controller.

[0016] By adopting the above technical solution, the photoelectric detection system often ignores the influence of temperature on the optical properties of the mixed liquid, resulting in temperature dependence of the measurement results. For example, a brewery found during summer production that the temperature of the mixed liquid rose from 20°C to 35°C due to the increase in ambient temperature. The photoelectric detection results produced a systematic error, resulting in inaccurate concentration control. The present application first collects the temperature of the mixed liquid in real time through a high-precision temperature sensor; then matches the temperature data with a pre-established temperature compensation curve in real time; based on the matching results, the light transmission data is intelligently compensated to eliminate the measurement deviation caused by temperature changes; at the same time, when the temperature exceeds the preset range, an alarm is promptly sent to the PLC controller, thereby improving the accuracy of concentration detection.

[0017] In a second aspect, the present application provides a system for preparing a cold-end spray mixture for a beer bottle, comprising: Water storage tanks, used to store tap water; A liquid storage tank, used for storing the spraying liquid; A first metering pump, connected to the water storage tank, for conveying tap water; A second metering pump, connected to the liquid storage tank, for conveying the spraying liquid; A mixer, connected to the outlet ends of the first metering pump and the second metering pump respectively; flow sensors, respectively disposed at the outlet ends of the first metering pump and the second metering pump; A PLC controller is electrically connected to the first metering pump, the second metering pump, and the flow sensor respectively; A human-machine interface is electrically connected to the PLC controller.

[0018] In a third aspect, the present application provides a spraying device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned method for configuring the cold end spray mixture of beer bottles when executing the computer program.

[0019] In summary, the present application includes at least one of the following beneficial technical effects: 1. The present application first delivers tap water through a first metering pump to obtain tap water flow data, and delivers spray liquid through a second metering pump according to the tap water flow data and a preset mixing ratio to obtain spray liquid flow data, and monitors the liquid output status of the first metering pump and the second metering pump in real time. When either the first metering pump or the second metering pump detects that there is no liquid output, an alarm signal is sent to the PLC controller; finally, the tap water flow data, the spray liquid flow data and the mixing ratio are displayed in real time through the human-machine interface, and parameters are set; the automation and precision of the spray liquid configuration are realized, and the real-time monitoring and automatic alarm functions are provided, thereby improving production safety; 2. The system first calculates the target flow rate of the spraying liquid accurately through an intelligent algorithm based on the real-time collected tap water flow data and the preset mixing ratio, and then converts the calculated target value into the control parameter of the second metering pump to achieve accurate delivery; at the same time, the system continuously monitors the actual delivery volume through a high-precision flow sensor, and feeds the data back to the PLC controller in real time for dynamic adjustment; this can automatically compensate and effectively cope with fluctuations in tap water flow; 3. The present application sets a transparent detection tube section at the outlet end of the mixed liquid, combines a light-emitting diode array and a photoelectric sensor array, and uses the light transmission characteristics of the mixed liquid to measure the concentration: the light-emitting diode array emits light of a specific wavelength, which is received by the photoelectric sensor array on the opposite side after passing through the mixed liquid. The actual concentration of the mixed liquid is determined by measuring the change in light transmission intensity. When the actual concentration deviates from the preset range, a flow adjustment signal is sent to the PLC controller. Automatic correction can be achieved without manual sampling to ensure that the concentration of the spray liquid always remains in the optimal range. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic flow chart of a method for preparing a mixed liquid for cold-end spraying of a beer bottle according to an embodiment of the present application; Figure 2 This is another schematic flow chart of a method for preparing a mixed liquid for cold-end spraying of a beer bottle according to an embodiment of the present application; Figure 3 This is another schematic flow chart of a method for preparing a mixed liquid for cold-end spraying of a beer bottle according to an embodiment of the present application; Figure 4 This is a module schematic diagram of a system for configuring a cold-end spray mixture for a beer bottle according to an embodiment of the present application; Figure 5 It is a schematic diagram of the interior of a spraying device according to an embodiment of the present application. DETAILED DESCRIPTION

[0021] The terms used in the following embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to be used as limitations to the present application. As used in the specification and appended claims of the present application, the singular expressions "one", "a kind of", "said", "above", "the" and "this" are intended to also include plural expressions, unless there is a clear indication to the contrary in the context. It should also be understood that the term "and / or" used in the present application refers to any or all possible combinations comprising one or more listed items.

[0022] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0023] The embodiments of the present application are further described in detail below in conjunction with the drawings in the specification.

[0024] In the first aspect, the present application provides a method for preparing a mixed liquid for cold end spraying of a beer bottle, referring to Figure 1 , including the following steps: S110, delivering tap water through a first metering pump to obtain tap water flow data.

[0025] In this embodiment, the first metering pump is used as the main pump to transport tap water, adopts a 12mm silicon carbide plunger structure, and has a single displacement of 500 microliters.

[0026] Specifically, firstly, the delivery flow rate of the first metering pump is set according to the preset production speed; then the real-time flow data of the first metering pump is collected to obtain the tap water flow data; finally, the tap water flow data is transmitted to the PLC controller.

[0027] S120, delivering the spraying liquid through the second metering pump according to the tap water flow data and the preset mixing ratio to obtain the spraying liquid flow data.

[0028] The steps include calculating the target flow of the spray liquid according to the tap water flow data and the preset mixing ratio, and setting the delivery flow of the second metering pump according to the target flow; then collecting the real-time flow data of the second metering pump to obtain the spray liquid flow data; and finally transmitting the spray liquid flow data to the PLC controller.

[0029] In this embodiment, the second metering pump is used as an auxiliary pump to transport the liquid medicine. It adopts a 5mm ceramic plunger structure and a single displacement of 30 microliters to ensure the metering accuracy under low flow conditions. The first metering pump and the second metering pump are both driven by a 2-phase stepper motor with a step angle of 1.8 degrees. Precise control is achieved through 1600 subdivisions. The motor operating speed range is 0-200rpm, which can meet the flow regulation requirements under different working conditions. The inlet tap water is adjusted to a stable pressure of 0.05-0.1MPa through a pressure reducing valve to provide stable feeding conditions for the system.

[0030] Specifically, the system mixes liquid according to a mixing ratio of 80:1. The set flow rate of the first metering pump is 166ml / min (equivalent to 80L per 8 hours of working time), and the set flow rate of the second metering pump is 2ml / min (equivalent to 1L per 8 hours of working time). S130, monitor the liquid output status of the first metering pump and the second metering pump in real time, and send an alarm signal to the PLC controller when either the first metering pump or the second metering pump detects that there is no liquid output.

[0031] In this embodiment, a pressure sensor is arranged on the outlet pipeline of the metering pump to monitor the liquid output state. When the liquid level in the water tank or liquid storage tank is too low and the pump cannot pump normally, the outlet pressure will be significantly reduced. The system defines the state where the pressure is lower than the preset pressure threshold as a state of no liquid output. At this time, the corresponding storage tank needs to be replenished in time to avoid affecting production.

[0032] S140, displaying the tap water flow data, the spray liquid flow data and the mixing ratio in real time through the human-machine interface.

[0033] The operator can set the mixing ratio and specific gravity parameters of each liquid through the LCD touch screen, and the system automatically calculates the required pumping frequency based on the set value. A pressure sensor is installed at the outlet of the pump. When abnormal liquid output is detected, the system automatically issues an audible and visual alarm. The system can be remotely started and stopped through an external signal interface (such as a foot switch, relay contact or optical fiber sensor). The system also has working timer and cumulative flow recording functions, and the data can be manually cleared through the human-machine interface.

[0034] In one embodiment, a transparent detection tube section is provided at the outlet of the mixed liquid, and a light emitting diode array and a photoelectric sensor array are provided on both sides of the detection tube section. Figure 2 , the method further comprises the steps of: S210, collecting light transmission data of the mixed liquid through a photoelectric sensing sensor array.

[0035] The detection tube in this embodiment is made of quartz glass with high light transmittance. The light emitting diode array is evenly distributed in a ring shape on one side of the detection tube; the photoelectric sensor array uses the same number of photosensitive diodes, which are arranged on the other side of the tube in a one-to-one correspondence with the LEDs. The luminous intensity of the LED is adjustable, and the operating current range is 20-50mA, ensuring that the appropriate transmission light signal can be obtained at different concentrations.

[0036] Furthermore, step S210 includes continuously collecting multiple sets of light transmission data according to a preset sampling period; removing the maximum value and the minimum value in the multiple sets of light transmission data; and averaging the remaining data to obtain effective light transmission data.

[0037] Specifically, the system uses a sampling period of 100ms to collect light intensity data from 8 sensors each time. A total of 300 sets of data are obtained within a 30-second sampling window. To eliminate ambient light interference, the ambient background value must be subtracted from the sampling value of each sensor. If the standard deviation of any sensor exceeds 5% of the average value, the data set is considered invalid and needs to be resampled.

[0038] S220, comparing the light transmission data with a preset calibration curve to obtain the actual concentration of the mixed solution.

[0039] The present embodiment uses a piecewise linear interpolation method to establish the corresponding relationship between light transmission data and the concentration of the mixed solution. The calibration curve is prepared by selecting 5 standard solutions of known concentration, measuring their light transmission data under the same conditions, and obtaining the calibration curve by least squares fitting.

[0040] S230: When the actual concentration deviates from the preset range, a flow rate adjustment signal is sent to the PLC controller.

[0041] Specifically, when the actual concentration is higher than the upper limit of the preset range, an adjustment signal is sent to the PLC controller to increase the flow rate of the first metering pump; when the actual concentration is lower than the lower limit of the preset range, an adjustment signal is sent to the PLC controller to increase the flow rate of the second metering pump; in actual production, large-scale adjustments often cause over-adjustment or under-adjustment of the concentration, so the delivery flow rate of the corresponding metering pump is gradually adjusted according to the preset adjustment step until the actual concentration returns to the preset range.

[0042] In one embodiment, referring to Figure 3, the method further comprises the steps of: S310, a temperature sensor is set at the detection pipe section to collect mixed liquid temperature data in real time.

[0043] Specifically, the system collects temperature data every 100ms, and collects 10 consecutive times as a set of data for processing. The collected resistance value is converted into a digital signal through a high-precision A / D converter. To eliminate possible electrical interference, the system performs median filtering on each set of data, removes abnormal values, and takes the average value as the current mixed liquid temperature data.

[0044] S320, matching the mixed liquid temperature data with a preset temperature compensation curve.

[0045] The temperature compensation curve of this embodiment is obtained by an experimental method. Under laboratory conditions, a mixed solution of standard concentration is used.

[0046] When the actual temperature deviates from the reference temperature, the required compensation amount is calculated based on the temperature difference and the compensation coefficient. To improve calculation efficiency, the system pre-calculates the compensation coefficient for each temperature point and stores it in a lookup table.

[0047] S330 , compensating and correcting the light transmission data according to the matching result.

[0048] Among them, this embodiment uses a real-time compensation method to correct the light transmission data. The compensation calculation takes into account the dual effects of temperature on the luminous intensity of the light-emitting diode and the sensitivity of the photoelectric sensor. The system calculates the temperature compensation factor based on the temperature compensation curve, which includes two parts: the luminous intensity compensation term and the detection sensitivity compensation term. The compensation process uses a table lookup interpolation method to ensure that the calculation speed meets the real-time requirements.

[0049] Specifically, the system first corrects the collected raw light transmission data according to the compensation factor under the current temperature conditions.

[0050] S340: When the temperature of the mixed liquid exceeds a preset range, a temperature abnormality signal is sent to the PLC controller.

[0051] When the temperature is detected to be outside the range, the system starts the temperature anomaly handling procedure.

[0052] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0053] In the second aspect, the present application provides a system for configuring a mixed liquid for cold-end spraying of beer bottles. The system for configuring a mixed liquid for cold-end spraying of beer bottles of the present application is described below in conjunction with the above-mentioned method for configuring a mixed liquid for cold-end spraying of beer bottles.

[0054] Reference Figure 4 , a beer bottle cold end spraying mixed liquid configuration system, comprising: Water storage tanks, used to store tap water; A liquid storage tank, used for storing the spraying liquid; A first metering pump, connected to the water storage tank, for conveying tap water; A second metering pump is connected to the liquid storage tank and is used to transport the spraying liquid; A mixer is connected to the outlet ends of the first metering pump and the second metering pump respectively; Flow sensors are respectively arranged at the outlet ends of the first metering pump and the second metering pump; A PLC controller is electrically connected to the first metering pump, the second metering pump, and the flow sensor respectively; Human-machine interface, electrically connected to the PLC controller.

[0055] In one embodiment, the system further comprises: A transparent detection tube section is arranged at the outlet end of the mixer; A light emitting diode array is arranged on one side of the detection tube section; The photoelectric sensor array is arranged on the other side of the detection tube section and corresponds to the light emitting diode array; Wherein, the light emitting diode array and the photoelectric induction sensor array are both electrically connected to the PLC controller.

[0056] In one embodiment, the system further includes: a temperature sensor, which is arranged at the detection pipe section and is used to collect mixed liquid temperature data in real time, and the temperature sensor is electrically connected to the PLC controller.

[0057] In one embodiment, the present application provides a spraying device, the internal structure of which can be as shown in FIG. Figure 5 As shown. The spraying device includes a processor, a memory and a network interface connected through a system bus. Among them, the processor of the spraying device is used to provide computing and control capabilities. The memory of the spraying device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the spraying device is used to store data. The network interface of the spraying device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for configuring a cold end spray mixture for a beer bottle is implemented.

[0058] Those skilled in the art will understand that Figure 5The structure shown in the figure is only a block diagram of a part of the structure related to the scheme of the present application, and does not constitute a limitation on the electronic device to which the scheme of the present application is applied. The specific spraying equipment may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0059] In one embodiment, a spraying device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0060] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the above-mentioned computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0061] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for preparing a mixed liquid for cold end spraying of beer bottles, characterized in that: The steps include: The tap water is delivered by a first metering pump to obtain tap water flow data; According to the tap water flow data and the preset mixing ratio, the spray liquid is delivered by a second metering pump to obtain the spray liquid flow data; Monitor the liquid output status of the first metering pump and the second metering pump in real time, and send an alarm signal to the PLC controller when either the first metering pump or the second metering pump detects that there is no liquid output; The tap water flow data, the spray liquid flow data and the mixing ratio are displayed in real time through a human-machine interface.

2. The method for preparing the mixed liquid for cold end spraying of beer bottles according to claim 1, characterized in that: The tap water is delivered by the first metering pump to obtain the tap water flow data, which specifically includes the following steps: According to a preset production speed, setting the delivery flow rate of the first metering pump; Collecting real-time flow data of the first metering pump to obtain tap water flow data; The tap water flow data is transmitted to the PLC controller.

3. The method for preparing the mixed liquid for cold end spraying of beer bottles according to claim 1, characterized in that: The step of delivering the spray liquid by the second metering pump according to the tap water flow data and the preset mixing ratio specifically comprises the following steps: Calculating a target flow rate of the spraying liquid according to the tap water flow rate data and a preset mixing ratio; setting the delivery flow rate of the second metering pump according to the target flow rate; Collecting real-time flow data of the second metering pump to obtain spray liquid flow data; The spraying liquid flow data is transmitted to the PLC controller.

4. The method for preparing the mixed liquid for cold end spraying of beer bottles according to claim 1, characterized in that: A transparent detection tube section is provided at the outlet end of the mixed liquid, and a light emitting diode array and a photoelectric sensor array are respectively provided on both sides of the detection tube section; the method further comprises the following steps: Collecting light transmission data of the mixed liquid by means of the photoelectric sensing sensor array; Comparing the light transmission data with a preset calibration curve to obtain the actual concentration of the mixed solution; When the actual concentration deviates from the preset range, a delivery flow adjustment signal is sent to the PLC controller.

5. The method for preparing the mixed liquid for cold end spraying of beer bottles according to claim 4, characterized in that: The light transmission data of the mixed liquid is collected by the photoelectric sensor array, specifically comprising the following steps: Continuously collecting multiple sets of light transmission data according to a preset sampling period; Eliminating the maximum value and the minimum value among the plurality of sets of light transmission data; The remaining data are averaged to obtain the effective light transmission data.

6. The method for preparing the mixed liquid for cold end spraying of beer bottles according to claim 4, characterized in that: When the actual concentration deviates from the preset range, a flow rate adjustment signal is sent to the PLC controller, which specifically includes the following steps: When the actual concentration is higher than the upper limit of the preset range, an adjustment signal is sent to the PLC controller to increase the flow rate of the first metering pump; When the actual concentration is lower than the lower limit of the preset range, an adjustment signal is sent to the PLC controller to increase the flow rate of the second metering pump; The delivery flow rate of the corresponding metering pump is gradually adjusted according to the preset adjustment step until the actual concentration returns to the preset range.

7. The method for preparing the mixed liquid for cold end spraying of beer bottles according to claim 6, characterized in that: The method further comprises the steps of: A temperature sensor is arranged at the position of the detection pipe section to collect the temperature data of the mixed liquid in real time; Matching the mixed liquid temperature data with a preset temperature compensation curve; Performing compensation correction on the light transmission data according to the matching result; When the temperature of the mixed liquid exceeds a preset range, a temperature abnormality signal is sent to the PLC controller.

8. A system for preparing mixed liquid for cold end spraying of beer bottles, characterized in that: include: Water storage tanks, used to store tap water; A liquid storage tank, used for storing the spraying liquid; A first metering pump, connected to the water storage tank, for conveying tap water; A second metering pump, connected to the liquid storage tank, for conveying the spraying liquid; A mixer, connected to the outlet ends of the first metering pump and the second metering pump respectively; flow sensors, respectively disposed at the outlet ends of the first metering pump and the second metering pump; A PLC controller is electrically connected to the first metering pump, the second metering pump, and the flow sensor respectively; A human-machine interface is electrically connected to the PLC controller.

9. A spraying device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the method for configuring the mixed liquid for cold-end spraying of beer bottles according to any one of claims 1 to 7 are implemented.

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