Automatic dispensing system for corn seed coating agent
By designing an automatic dispensing system, the problem of inaccurate proportion of agents during the preparation of corn seed coating agents is solved, automated and real-time monitoring is achieved, formulation efficiency and accuracy are improved, and manual operation risks are reduced.
Patent Information
- Application Number
- CN202411369407.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2024-12-27
AI Technical Summary
In the prior art, during the preparation of corn seed coat agents, the proportion of the agent is inaccurate due to manual operation, which affects the germination rate and pest resistance of the seeds, and lacks an automated and real-time monitoring system.
An automatic dispensing system was designed, including multiple raw material tanks, weighing mixing tanks, temporary storage tanks and control modules. Through components such as peristaltic pumps, electric ball valves, weighing sensors and level gauges, the editable controller and touch screen are used. Achieve automated dispensing and real-time monitoring and adjustment of drug ratios.
It realizes automation and accuracy of drug preparation, improves work efficiency, reduces manual operation errors, and reduces the risk of harmful toxic liquid to operators.
Smart Images
Figure CN119186370A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of pharmaceuticals and relates to an automatic dispensing system, in particular to an automatic dispensing system for corn seed coating agents. Background Art
[0002] During the seed coating process, with the continuous increase in the use of corn seeds, the use of corn seed coating agents also increases simultaneously. While increasing the corn seeds, the preparation of corn seed coating agents needs to be carried out simultaneously. At present, artificial preparation is usually adopted in China.
[0003] Corn seed coating agent is composed of a variety of chemical drugs, which have the functions of disinfection, sterilization, insecticide, and nutrition increase. In the process of preparation, different amounts of liquid medicine will be added according to the operator's operating habits, physical conditions, ideological problems, memory errors, etc., resulting in problems with the proportion of the medicine, which will affect the germination rate, pesticide resistance, insect pest resistance and other key data of the batch of coated seeds to a certain extent. A new ratio control system is provided here to reduce the problem of drug ratio caused by the operator's operating problems, and at the same time realize continuous preparation work with accurate data, which has certain practical significance for large corn seed processing companies. Summary of the invention
[0004] The technical problem to be solved by the present invention is to propose an automatic dispensing system for corn seed coating agents, which can automatically dispense the agents according to actual needs and monitor the accuracy of the proportions in real time, in view of the deficiencies in the prior art.
[0005] The technical problem to be solved by the present invention is achieved through the following technical scheme: an automatic dispensing system for corn seed coating agents, comprising a plurality of raw material tanks and a control module, the raw material tanks are connected to a weighing mixing tank through a pipeline, the weighing mixing tank is connected to a temporary storage tank through a pipeline, a peristaltic pump and an electric ball valve are arranged between the raw material tank and the weighing mixing tank, and a peristaltic pump and an electric ball valve are arranged between the weighing mixing tank and the temporary storage tank; weighing sensors are arranged at the bottom of the raw material tank and the weighing mixing tank; agitators are arranged on the weighing mixing tank and the temporary storage tank; liquid level gauges are arranged on the raw material tank, the weighing mixing tank and the temporary storage tank; a manual ball valve is also arranged on the temporary storage tank; the control module comprises an editable controller with a switch, the editable controller is connected to a frequency converter through the switch, the frequency converter drives the peristaltic pump; the editable controller is connected to the electric ball valve through a remote I / O; the editable controller is connected to the weighing sensor through a serial port server; the editable controller HIA is connected to the liquid level gauge; and a touch screen is connected to the editable controller.
[0006] The following steps are used to perform the dispensing operation: The basic operation steps are as follows: the editable controller 31 is controlled by operating the touch screen 30, and the output of the frequency converters 34, 35, 36, 37, and 38 are controlled through the switch 29 to drive the peristaltic pumps 13, 14, 15, 16, and 25 to operate; at the same time, the editable controller 31 controls the switch and opening size signals of the electric ball valves 17, 18, 19, 20, and 24 through the remote I / O 33. The editable controller 31 directly collects the high and low limit switch signals of the liquid level meter, and completes the dispensing process of the seed dressing agent mixture through the system automatic program.
[0007] During the liquid preparation process, the weighing sensors 1, 2, 3, 4, 22 transmit weight signals to the editable controller 31, the liquid level meters 9, 10, 11, 12, 23 transmit the obtained liquid level signals and the highest position and lowest position signals to the editable controller 31, the touch screen 30 exchanges data with the editable controller 31 through the data line, and the editable controller 31 controls the peristaltic pumps 13, 14, 15, 16, 25 and the agitators 21, 26 by controlling the frequency converters 34, 35, 36, 37, 38; Preferably, the dispensing system adopts the following method to complete the dispensing: After the system is turned on, first select different formulas on the touch screen 30 according to actual needs. After the formula selection is completed, the editable controller 31 confirms the proportion of each component of the seed dressing agent required, and determines the weight of the medicine required for the raw material tanks 5, 6, 7, and 8 by calculating the corresponding proportions of each variety in the formula according to the required total amount of the mixed liquid. At this time, press the start button, the system opens the electric ball valve 17 on the pipeline, and starts to extract the first medicine from the raw material tank 5 into the weighing mixing tank 39. According to the weight of the liquid medicine in the raw material tank 5 in the formula, the weight difference of the required liquid medicine is calculated, and the final stop value of the peristaltic pump 13 is obtained by subtracting the required liquid medicine weight from the initial weight of the weighing mixing tank 39. At the same time, the liquid medicine weight value corresponding to the fast rotation stage of the peristaltic pump 13 in the first stage is calculated, and the liquid medicine weight value of the slow rotation stage of the peristaltic pump 13 in the second stage is similarly obtained. Because the liquid has a certain inertia when the peristaltic pump 13 stops, an adjustable medicine drop weight is given, and the actual peristaltic pump 13 stops in advance to the medicine drop weight point, usually quickly. The weight of the liquid medicine extracted in the first stage is 90% of the required liquid medicine weight, and the weight of the liquid medicine extracted in the slow liquid administration stage is 10% of the required liquid medicine weight. The weight of the medicine dropped is determined by the size of the pipeline diameter and the speed of the slow liquid administration stage. The parameter is obtained through actual test run experiments. During normal operation, the first operation section is the rapid drug administration stage. The editable controller 30 controls the peristaltic pump 13 to operate at high speed. When the weight reaches the slow feeding weight, that is, the actual weight reduction value of the weighing bucket, the editable controller 30 automatically controls the program to adjust the inverter operating parameters and reduce the speed of the peristaltic pump 13. At this time, the second stage, the slow feeding stage, is entered, thereby reducing the drug feeding speed. At this time, the weight in the weighing mixing tank 39 increases slowly, greatly improving the accuracy of drug administration. When the weight value of the early pump stop is reached, the system stops the peristaltic pump 13 and closes the electric ball valve 17 in the pipeline. At this time, the amount reduced in the raw material tank 5 should be equal to the weight increased in the weighing mixing tank 39. The system can perform a secondary verification of the accuracy and reliability of the weighing system. After the addition of the reagent to the raw material tank 5 is completed, the second reagent is extracted from the raw material tank 6 into the weighing mixing tank 39. This process is the same as the method of adding the first reagent. By controlling the peristaltic pump 14 and the electric ball valve 18, the weight of the reagent extracted from the raw material tank 6 is equal to the weight added for the second time in the weighing mixing tank 39. After the second agent is finished, the third agent is extracted from the raw material tank 7 into the weighing mixing tank 39. The process is the same as the last agent adding method. By controlling the peristaltic pump 15 and the electric ball valve 19, the weight of the agent extracted from the raw material tank 7 is equal to the weight added for the third time in the weighing mixing tank 39. The same principle is used to add the fourth agent. The fourth agent is extracted from the raw material tank 8 into the weighing mixing tank 39. The process is the same as the last agent adding method. By controlling the peristaltic pump 16 and the electric ball valve 20, the weight of the agent extracted from the raw material tank 8 is equal to the fourth added weight in the weighing mixing tank 39. The proportional weight addition of different components of the seed dressing agent is completed. Finally, the weight reduction of the four raw material tanks 5, 6, 7, and 8 is equal to the weight increase of the weighing mixing tank 39, which is qualified. The weight signals are obtained by weighing sensors 1, 2, 3, 4, and 22 respectively; In the process of adding medicines, the agitator 21 in the weighing and mixing tank 39 keeps running to ensure the quality of mixing; after all four medicines are extracted, they are stirred for a period of time in the weighing and mixing tank 39, and then the electric ball valve 24 on the pipeline of the temporary storage tank 40 is opened, and the peristaltic pump 25 is turned on to extract the medicine into the temporary storage tank 40. The user can manually open the manual ball valve 28 to extract the medicine for use in the subsequent coating machine.
[0008] Preferably, the dispensing system adopts the following method to complete the dispensing: After the system is turned on, the recipe selection menu on the touch screen 30 is used to select different recipes. After the recipe selection is completed, the required proportions of the various components of the seed dressing agent have been confirmed. The system will determine the weight of the medicine required for each raw material tank 5, 6, 7, and 8 by calculating the corresponding proportions of each variety in the recipe according to the required total amount of the mixed liquid. At this time, the start button is pressed. When the start button is turned on, the system simultaneously opens the electric ball valves 17, 18, 19, 20, and 24 of the corresponding pipelines through the remote I / O 33, and controls the four inverters 34, 35, 36, and 37 through the switch 29. Control the peristaltic pumps 13, 14, 15, and 16 to extract four different coating agents into the weighing mixing tank 39 at the same time. The extraction method of each raw material tank is to extract the liquid medicine at two speeds of high and low. After the four peristaltic pumps 13, 14, 15, and 16 have finished extracting each agent according to the required weight, the electric ball valves 17, 18, 19, and 20 of the raw material tank pipeline are automatically closed to shut off the pipeline. After the selected agents are extracted, the total weight reduction of the four raw material tanks 5, 6, 7, and 8 is equal to the weight increase of the weighing mixing tank 39. The system verifies the accuracy of the dispensing by this. The weight signals are obtained by the weighing sensors 1, 2, 3, 4, and 22 respectively. During the preparation of the medicine, the agitator 21 in the weighing and mixing tank 39 is always running to ensure the preparation quality of the medicine mixing; after all four medicines are extracted, the mixed liquid of the four medicines is stirred evenly in the weighing and mixing tank 39 for a period of time, and then according to the mixing effect of the mixed liquid and whether there is any residual mixed liquid in the temporary storage tank 40, if the temporary storage tank 40 is empty, the control ball valve 24 on the pipeline of the temporary storage tank 40 is opened, the peristaltic pump 25 is turned on, and the liquid medicine is extracted into the temporary storage tank 40, and the manual ball valve 28 can be manually opened to extract the liquid medicine for use by the subsequent coating machine; if there is any residue, or the mixing effect is not achieved, it is temporarily stored in the weighing and mixing tank 39 and the agitator 26 is started for stirring.
[0009] The two matching methods are selected by the operator. The first method has high accuracy in adding drugs and the best effect, but the process takes a long time. The second method has fast adding speed and high accuracy. Since the addition is done at the same time, if the machine stops abnormally during the process, such as power failure or emergency stop, the drug preparation needs to be completed manually.
[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention realizes the automation of the batching process, the medicine is automatically prepared according to actual needs, and the accuracy of the proportion is monitored in real time, which greatly improves the work efficiency, improves the accuracy of drug preparation, reduces manual operation, and avoids the risk of harm to operators by toxic and harmful liquid medicines. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 is a system control diagram of the present invention; Figure 3 It is a system control process diagram of the present invention; Figure 4 It is a schematic diagram of the structure of the medicine tank of the present invention; Figure 5 It is a schematic diagram of the structure of the weighing mixing tank and the temporary storage tank of the present invention.
[0012] Among them, weighing sensors 1, 2, 3, 4, 22; raw material tanks 5, 6, 7, 8; liquid level meters 9, 10, 11, 12, 23, 27; peristaltic pumps 13, 14, 15, 16, 25; electric ball valves 17, 18, 19, 20, 24; agitators 21, 26; manual ball valve 28; switch 29; touch screen 30; editable controller 31; serial port server 32; remote I / O 33; frequency converters 34, 35, 36, 37, 38; weighing mixing tank 39; temporary storage tank 40. DETAILED DESCRIPTION
[0013] An automatic dispensing system for corn seed coating agents, such as Figure 1-5As shown, it includes multiple raw material tanks and a control module. The raw material tank is connected to the weighing mixing tank through a pipeline, and the weighing mixing tank is connected to the temporary storage tank through a pipeline. A peristaltic pump and an electric ball valve are arranged between the raw material tank and the weighing mixing tank, and a peristaltic pump and an electric ball valve are arranged between the weighing mixing tank and the temporary storage tank; weighing sensors are arranged at the bottom of the raw material tank and the weighing mixing tank; agitators are arranged on the weighing mixing tank and the temporary storage tank; liquid level gauges are arranged on the raw material tank, the weighing mixing tank and the temporary storage tank; a manual ball valve is also arranged on the temporary storage tank; the control module includes an editable controller with a switch, the editable controller is connected to the frequency converter through the switch, and the frequency converter drives the peristaltic pump; the editable controller is connected to the electric ball valve through remote I / O; the editable controller is connected to the weighing sensor through the serial port server; the editable controller HIA is connected to the liquid level gauge; and the editable controller is connected to a touch screen.
[0014] Dispensing method 1: use the following steps to perform the dispensing operation: The basic operation steps are as follows: the editable controller 31 is controlled by operating the touch screen 30, and the output of the frequency converters 34, 35, 36, 37, and 38 are controlled through the switch 29 to drive the peristaltic pumps 13, 14, 15, 16, and 25 to operate; at the same time, the editable controller 31 controls the switch and opening size signals of the electric ball valves 17, 18, 19, 20, and 24 through the remote I / O 33. The editable controller 31 directly collects the high and low limit switch signals of the liquid level meter, and completes the dispensing process of the seed dressing agent mixture through the system automatic program.
[0015] During the liquid preparation process, the weighing sensors 1, 2, 3, 4, 22 transmit weight signals to the editable controller 31, the liquid level meters 9, 10, 11, 12, 23 transmit the obtained liquid level signals and the highest position and lowest position signals to the editable controller 31, the touch screen 30 exchanges data with the editable controller 31 through the data line, and the editable controller 31 controls the peristaltic pumps 13, 14, 15, 16, 25 and the agitators 21, 26 by controlling the frequency converters 34, 35, 36, 37, 38; Preferably, the dispensing system adopts the following method to complete the dispensing: After the system is turned on, first select different formulas on the touch screen 30 according to actual needs. After the formula selection is completed, the editable controller 31 confirms the proportion of each component of the seed dressing agent required, and determines the weight of the medicine required for the raw material tanks 5, 6, 7, and 8 by calculating the corresponding proportions of each variety in the formula according to the required total amount of the mixed liquid. At this time, press the start button, the system opens the electric ball valve 17 on the pipeline, and starts to extract the first medicine from the raw material tank 5 into the weighing mixing tank 39. According to the weight of the liquid medicine in the raw material tank 5 in the formula, the weight difference of the required liquid medicine is calculated, and the final stop value of the peristaltic pump 13 is obtained by subtracting the required liquid medicine weight from the initial weight of the weighing mixing tank 39. At the same time, the liquid medicine weight value corresponding to the fast rotation stage of the peristaltic pump 13 in the first stage is calculated, and the liquid medicine weight value of the slow rotation stage of the peristaltic pump 13 in the second stage is similarly obtained. Because the liquid has a certain inertia when the peristaltic pump 13 stops, an adjustable medicine drop weight is given, and the actual peristaltic pump 13 stops in advance to the medicine drop weight point, usually quickly. The weight of the liquid medicine extracted in the first stage is 90% of the required liquid medicine weight, and the weight of the liquid medicine extracted in the slow liquid administration stage is 10% of the required liquid medicine weight. The weight of the medicine dropped is determined by the size of the pipeline diameter and the speed of the slow liquid administration stage. The parameter is obtained through actual test run experiments. During normal operation, the first operation section is the rapid drug administration stage. The editable controller 30 controls the peristaltic pump 13 to operate at high speed. When the weight reaches the slow feeding weight, that is, the actual weight reduction value of the weighing bucket, the editable controller 30 automatically controls the program to adjust the inverter operating parameters and reduce the speed of the peristaltic pump 13. At this time, the second stage, the slow feeding stage, is entered, thereby reducing the drug feeding speed. At this time, the weight in the weighing mixing tank 39 increases slowly, greatly improving the accuracy of drug administration. When the weight value of the early pump stop is reached, the system stops the peristaltic pump 13 and closes the electric ball valve 17 in the pipeline. At this time, the amount reduced in the raw material tank 5 should be equal to the weight increased in the weighing mixing tank 39. The system can perform a secondary verification of the accuracy and reliability of the weighing system. After the addition of the reagent to the raw material tank 5 is completed, the second reagent is extracted from the raw material tank 6 into the weighing mixing tank 39. This process is the same as the method of adding the first reagent. By controlling the peristaltic pump 14 and the electric ball valve 18, the weight of the reagent extracted from the raw material tank 6 is equal to the weight added for the second time in the weighing mixing tank 39. After the second agent is finished, the third agent is extracted from the raw material tank 7 into the weighing mixing tank 39. The process is the same as the last agent adding method. By controlling the peristaltic pump 15 and the electric ball valve 19, the weight of the agent extracted from the raw material tank 7 is equal to the weight added for the third time in the weighing mixing tank 39. The same principle is used to add the fourth agent. The fourth agent is extracted from the raw material tank 8 into the weighing mixing tank 39. The process is the same as the last agent adding method. By controlling the peristaltic pump 16 and the electric ball valve 20, the weight of the agent extracted from the raw material tank 8 is equal to the fourth added weight in the weighing mixing tank 39. The proportional weight addition of different components of the seed dressing agent is completed. Finally, the weight reduction of the four raw material tanks 5, 6, 7, and 8 is equal to the weight increase of the weighing mixing tank 39, which is qualified. The weight signals are obtained by weighing sensors 1, 2, 3, 4, and 22 respectively; In the process of adding medicines, the agitator 21 in the weighing and mixing tank 39 keeps running to ensure the quality of mixing; after all four medicines are extracted, they are stirred for a period of time in the weighing and mixing tank 39, and then the electric ball valve 24 on the pipeline of the temporary storage tank 40 is opened, and the peristaltic pump 25 is turned on to extract the medicine into the temporary storage tank 40. The user can manually open the manual ball valve 28 to extract the medicine for use in the subsequent coating machine.
[0016] Dispensing method 2: Use the following steps to complete the dispensing: After the system is turned on, the recipe selection menu on the touch screen 30 is used to select different recipes. After the recipe selection is completed, the required proportions of the various components of the seed dressing agent have been confirmed. The system will determine the weight of the medicine required for each raw material tank 5, 6, 7, and 8 by calculating the corresponding proportions of each variety in the recipe according to the required total amount of the mixed liquid. At this time, the start button is pressed. When the start button is turned on, the system simultaneously opens the electric ball valves 17, 18, 19, 20, and 24 of the corresponding pipelines through the remote I / O 33, and controls the four inverters 34, 35, 36, and 37 through the switch 29. Control the peristaltic pumps 13, 14, 15, and 16 to extract four different coating agents into the weighing mixing tank 39 at the same time. The extraction method of each raw material tank is to extract the liquid medicine at two speeds of high and low. After the four peristaltic pumps 13, 14, 15, and 16 have finished extracting each agent according to the required weight, the electric ball valves 17, 18, 19, and 20 of the raw material tank pipeline are automatically closed to shut off the pipeline. After the selected agents are extracted, the total weight reduction of the four raw material tanks 5, 6, 7, and 8 is equal to the weight increase of the weighing mixing tank 39. The system verifies the accuracy of the dispensing by this. The weight signals are obtained by the weighing sensors 1, 2, 3, 4, and 22 respectively. During the preparation of the medicine, the agitator 21 in the weighing and mixing tank 39 is always running to ensure the preparation quality of the medicine mixing; after all four medicines are extracted, the mixed liquid of the four medicines is stirred evenly in the weighing and mixing tank 39 for a period of time, and then according to the mixing effect of the mixed liquid and whether there is any residual mixed liquid in the temporary storage tank 40, if the temporary storage tank 40 is empty, the control ball valve 24 on the pipeline of the temporary storage tank 40 is opened, the peristaltic pump 25 is turned on, and the liquid medicine is extracted into the temporary storage tank 40, and the manual ball valve 28 can be manually opened to extract the liquid medicine for use by the subsequent coating machine; if there is any residue, or the mixing effect is not achieved, it is temporarily stored in the weighing and mixing tank 39 and the agitator 26 is started for stirring.
[0017] The operator can choose between two dispensing methods. The first method has high accuracy and the best effect, but the process takes a long time. The second method has fast dosing speed and high accuracy. Since the dosing is done at the same time, if the machine stops abnormally during the process, such as power failure or emergency stop, the preparation of the drug needs to be completed manually.
Claims
1. An automatic dispensing system for corn seed coating agent, characterized in that: It includes multiple raw material tanks and control modules. The raw material tank is connected to the weighing mixing tank through a pipeline. The weighing mixing tank is connected to the temporary storage tank through a pipeline. A peristaltic pump and an electric ball valve are arranged between the raw material tank and the weighing mixing tank, and a peristaltic pump and an electric ball valve are arranged between the weighing mixing tank and the temporary storage tank. Weighing sensors are arranged at the bottom of the raw material tank and the weighing mixing tank. Agitators are arranged on the weighing mixing tank and the temporary storage tank. Liquid level gauges are arranged on the raw material tank, the weighing mixing tank and the temporary storage tank. A manual ball valve is also arranged on the temporary storage tank. The control module includes an editable controller with a switch. The editable controller is connected to the frequency converter through the switch, and the frequency converter drives the peristaltic pump. The editable controller is connected to the electric ball valve through remote I / O. The editable controller is connected to the weighing sensor through a serial port server. The editable controller HIA is connected to the liquid level gauge. The editable controller is connected to a touch screen.
2. The automatic dispensing system for corn seed coating agent according to claim 1 is characterized in that: The dispensing operation is carried out through the following steps: the editable controller is controlled by operating the touch screen, the inverter output is controlled by the switch, and the peristaltic pump is driven to operate; at the same time, the editable controller controls the switch and opening size signal of the electric ball valve through the remote I / O, and the editable controller directly collects the high and low limit switch signals of the liquid level meter, and completes the dispensing process of the seed dressing agent mixture through the system automatic program; during the dispensing process, the weighing sensor transmits the weight signal to the editable controller, and the liquid level meter sends the obtained liquid level signal and the highest and lowest position signals to the editable controller. The touch screen exchanges data with the editable controller through the data line, and the editable controller controls the peristaltic pump and agitator by controlling the inverter.
3. The automatic dispensing system for corn seed coating agent according to claim 2, characterized in that: The dispensing operation is carried out through the following steps. After the system is turned on, first select different formulas on the touch screen according to actual needs. After the formula selection is completed, the controller can be edited to confirm the required proportion of each component of the seed dressing agent. According to the required total amount of mixed liquid, the corresponding proportion of each variety in the formula is calculated to determine the weight of the medicine required in the raw material tank. At this time, press the start button, the system opens the electric ball valve on the pipeline, and starts to extract the first medicine from the first raw material tank into the weighing mixing tank. According to the weight of the liquid medicine in the first raw material tank in the formula, the weight difference of the required liquid medicine is calculated, and the final weight is obtained by subtracting the required liquid medicine weight from the initial weight of the weighing mixing tank. The accurate value of the peristaltic pump stopping is calculated, and the weight value of the drug liquid corresponding to the fast rotation stage of the peristaltic pump in the first stage is calculated. Similarly, the weight value of the drug liquid in the slow rotation stage of the peristaltic pump in the second stage is calculated. Since the liquid has a certain inertia when the peristaltic pump stops, an adjustable drug drop weight is given. The actual peristaltic pump stopping time should be advanced to the drug drop weight point. Usually, the weight of the drug liquid extracted in the fast drug delivery stage is 90% of the required drug liquid weight, and the weight of the drug liquid extracted in the slow drug delivery stage is 10% of the required drug liquid weight. The drug drop weight value is comprehensively judged according to the size of the pipeline diameter and the speed of the slow drug delivery stage. The actual test run experiment obtains this value. Parameters; During normal operation, the first operation section is the rapid drug delivery stage. The editable controller controls the peristaltic pump to run at high speed. When the weight reaches the slow delivery weight, that is, the actual weight reduction value of the weighing bucket, the editable controller automatically controls the program to adjust the inverter operation parameters to reduce the speed of the peristaltic pump. At this time, it enters the second stage, the slow delivery stage, thereby reducing the drug delivery speed. At this time, the weight in the weighing mixing tank increases slowly, greatly improving the accuracy of drug delivery; when the weight value for early pump stop is reached, the system stops the peristaltic pump and closes the electric ball valve in the pipeline; at this time, the amount reduced in the first raw material tank should be equal to the weight increased in the weighing mixing tank, and the system can perform secondary Verify the accuracy and reliability of the weighing system; after the first raw material tank is added with the reagent, start to extract the second reagent from the second raw material tank into the weighing mixing tank. This process is the same as the method of adding the first reagent. By controlling the peristaltic pump and the electric ball valve, the weight of the reagent extracted from the second raw material tank is equal to the weight added for the second time in the weighing mixing tank; after the second reagent is added, start to extract the third reagent from the third raw material tank into the weighing mixing tank. This process is the same as the method of adding the reagent last time. By controlling the peristaltic pump and the electric ball valve, the weight of the reagent extracted from the third raw material tank is equal to the weight added for the third time in the weighing mixing tank; The same principle is used to add the fourth agent. The fourth agent is extracted from the fourth raw material tank into the weighing mixing tank. The process is the same as the previous method of adding agents. By controlling the peristaltic pump and the electric ball valve, the weight of the agent extracted from the fourth raw material tank is equal to the fourth weight added in the weighing mixing tank; the proportional weight addition of different components of the seed coating agent is completed; the weight reduction of the last four raw material tanks is equal to the weight increase of the weighing mixing tank, which is qualified; the weight signal is obtained by each weighing sensor respectively; in the process of adding agents, the agitator in the weighing mixing tank keeps running to ensure the quality of mixing; after all four agents are extracted, they are stirred in the weighing mixing tank for a period of time, and then the electric ball valve on the temporary storage tank pipeline is opened, and the peristaltic pump on the temporary storage tank pipeline is opened to extract the medicine into the temporary storage tank, and the manual ball valve can be manually opened to extract the medicine for use by the subsequent coating machine.
4. The automatic dispensing system for corn seed coating agent according to claim 2, characterized in that: The following steps are used for dispensing operations. After the system is turned on, first select different formulas on the touch screen according to actual needs. After the formula selection is completed, the controller can be edited to confirm the proportion of each component of the seed dressing agent required. According to the required total amount of mixed liquid, the corresponding proportion of each variety in the formula is calculated to determine the weight of the medicine required for each raw material tank. At this time, press the start button, the system opens the first electric ball valve on the pipeline, and begins to extract the first medicine from the first raw material tank into the weighing mixing tank. According to the weight of the liquid medicine in the first raw material tank in the formula, the weight difference of the required liquid medicine is calculated, and the final accurate value of the first peristaltic pump stop is obtained by subtracting the required liquid medicine weight from the initial weight of the weighing mixing tank. At the same time, the liquid medicine weight corresponding to the fast rotation stage of the first peristaltic pump in the first stage is calculated. Similarly, the liquid medicine weight of the first peristaltic pump in the slow rotation stage of the second stage is obtained. Since the liquid has a certain inertia when the first peristaltic pump stops, an adjustable medicine drop weight is given. The actual first peristaltic pump stop timing should be advanced to the medicine drop weight. Point, usually the weight of the liquid medicine extracted in the fast dosing stage is 90% of the required liquid medicine weight, and the weight of the liquid medicine extracted in the slow dosing stage is 10% of the required liquid medicine weight. The weight of the medicine dropped is determined by the size of the pipeline diameter and the speed of the slow dosing stage. This parameter is obtained through actual test run experiments. During normal operation, the first operation section is the fast dosing stage. The editable controller controls the first peristaltic pump to run at high speed. When the weight reaches the slow dosing weight, that is, the actual weight reduction value of the weighing bucket, the editable controller automatically controls the program to adjust the inverter operating parameters and reduce the speed of the first peristaltic pump. At this time, the second stage, the slow dosing stage, is entered, thereby reducing the drug feeding speed. At this time, the weight in the weighing mixing tank increases slowly, greatly improving the accuracy of dosing. When the early pump stop weight value is reached, the system stops the first peristaltic pump and closes the first electric ball valve in the pipeline. At this time, the amount reduced in the first raw material tank should be equal to the weight increased in the weighing mixing tank. The system can perform a secondary verification of the accuracy and reliability of the weighing system. After the first raw material tank is filled with reagents, the second reagent is extracted from the second raw material tank into the weighing mixing tank. The process is the same as the method of adding the first reagent. By controlling the second peristaltic pump and the second electric ball valve, the weight of the reagent extracted from the second raw material tank is equal to the weight added in the weighing mixing tank for the second time. After the second reagent is finished, the third reagent is extracted from the third raw material tank into the weighing mixing tank. The process is the same as the last reagent adding method. By controlling the third peristaltic pump and the third electric ball valve, the weight of the reagent extracted from the third raw material tank is equal to the weight added in the weighing mixing tank for the third time. The same principle is followed when the fourth agent is added. The fourth agent is extracted from the fourth raw material tank into the weighing mixing tank. The process is the same as the previous method of adding agents. By controlling the fourth peristaltic pump and the fourth electric ball valve, the weight of the agent extracted from the fourth raw material tank is equal to the fourth weight added to the weighing mixing tank. The proportional weight addition of different components of the seed coating agent is completed. The weight reduction of the last four raw material tanks is equal to the weight increase of the weighing mixing tank, which is qualified. The weight signal is obtained by each weighing sensor respectively. In the process of adding agents, the agitator in the weighing mixing tank keeps running to ensure the quality of mixing. After all four agents are extracted, they are stirred for a period of time in the weighing mixing tank, and then the electric ball valve on the temporary storage tank pipeline is opened, and the peristaltic pump on the temporary storage tank pipeline is opened to extract the medicine into the temporary storage tank. The manual ball valve can be opened manually to extract the medicine for use by the subsequent coating machine.