CN105499549B - A kind of copper anode plate automatic ration casting control system and control method - Google Patents

Abstract

The invention discloses a copper anode plate automatic quantitative casting control system and a control method, comprising a PLC controller, a proximity switch connected to the input end of the PLC controller; a weighing sensor connected to a weighing module, and the weighing module sends a signal to the weighing signal After conditioning and analog-to-digital conversion, it is sent to the PLC controller. The output end of the weighing module is also connected to the electromagnetic proportional valve that adjusts the oil inlet pipe of the hydraulic cylinder for starting the casting ladle and the tundish; the PLC controller controls the disc through the frequency converter. The rotation of the drive motor; the PLC controller is connected to the electromagnetic reversing valve installed in the oil inlet pipeline of the tundish; the PLC controller is connected to the touch screen; the PLC controller calculates the amount of copper poured water according to the weight of the casting ladle collected by the load cell And generate a speed control signal to act on the electromagnetic proportional valve to make the casting speed follow the set track. The casting efficiency and quality are improved, and the cast copper anode plate has a higher shape specification.

Description

A copper anode plate automatic quantitative casting control system and control method

technical field

The invention relates to the technical field of quantitative casting, in particular to an automatic quantitative casting control system and control method for copper anode plates.

Background technique

With the rapid development of China's economy, China's total GDP has reached the second place in the world. At the same time, China's refined copper production has a high growth rate, and the copper market consumption has grown steadily. According to data released by the International Copper Study Group (ICSG), China's copper metal Content production is the world's main production area. Against this background, copper prices have risen steadily, which has stimulated domestic large-scale copper smelting enterprises to increase production capacity, eliminate outdated copper smelting technology, introduce advanced smelting technology and equipment, and strive for an active position in future market competition. Copper anode plate is the raw material for rough smelting copper electrolytic refining to produce pure copper. In order to obtain high-quality electrolytic pure copper, in addition to the impurity content of the copper anode plate itself should not be too high, the copper anode plate must have a certain standard shape, which requires The thickness of each anode plate is consistent, the surface is smooth, and the geometric dimensions are consistent, so as to ensure that the distance between the same electrodes can be reduced during the electrolytic refining of the anode plate, the current density can be increased, the short circuit rate and the residual electrode rate can be reduced, and at the same time, it is convenient to realize the linkage operation and meet the requirements process requirements. The anode plate casting machine is the casting equipment for obtaining copper electrolytic refining raw materials. It is of great significance to research and develop high-efficiency, energy-saving and highly automated copper anode plate quantitative casting equipment.

At present, the copper anode disc quantitative casting machine has great advantages in saving resources, reducing labor costs, increasing production capacity, and improving product quality. However, the automatic quantitative casting control technology is not very mature, and it still faces the weight accuracy control of the casting process. Low, poor system stability, low casting efficiency, self-adaptive to changes in working conditions, and low self-adjustment capabilities.

Contents of the invention

The purpose of the present invention is to solve the above problems, to provide a copper anode plate automatic quantitative casting control system and control method, which improves the casting efficiency and quality, and makes the cast copper anode plate have a higher shape specification.

In order to achieve the above object, the present invention adopts the following technical solutions:

An automatic quantitative casting control system for copper anode plates, including a PLC controller, a proximity switch installed in the middle cavity of the disc is connected to the input end of the PLC controller;

The weighing sensor installed on the base of the casting ladle is connected to the weighing module, and the weighing module performs signal conditioning and analog-to-digital conversion on the weighing signal and sends it to the PLC controller. The output end of the weighing module is also connected to the adjustment casting ladle and The tundish start hydraulic cylinder oil inlet pipe is connected to the electromagnetic proportional valve of the size of the oil inlet;

The PLC controller controls the rotation of the disc drive motor through a frequency converter;

The PLC controller is connected with the electromagnetic reversing valve installed in the oil inlet pipeline of the tundish;

The PLC controller is connected with the touch screen;

The PLC controller calculates the amount of copper poured water based on the weight of the casting ladle collected by the load cell and generates a speed control signal, which acts on the electromagnetic proportional valve to make the casting speed follow the set track.

The proximity switch includes a limit switch and a stop proximity switch.

The PLC controller is also connected with the control buttons.

The output end of the PLC controller is connected with indicator lights for indicating the return of the tundish, the return of the casting ladle and the arrival of the disc.

The touch screen is connected to the PLC controller through the RS485 interface, and the working state of the copper water casting can be monitored through the touch screen, and the parameters of the PLC controller can be modified and set through the touch screen to adjust the working state of the copper water casting.

The control method adopting the automatic quantitative casting control system of a kind of copper anode plate comprises,

After the copper water in the molten state flows into the tundish through the chute, after reaching the set weight, the PLC controller controls the electromagnetic reversing valve so that the high-pressure oil enters the tundish hydraulic cylinder to start the tundish, and the copper water flows into the casting ladle, and the casting ladle The weighing sensor under the base converts the weight and pressure value of copper water into a voltage signal and transmits it to the weighing module. The weighing module conditioned, filtered and converted the voltage signal to the PLC controller for calling and processing; When the weight of the copper water inside reaches the set value, the PLC controller switches the electromagnetic valve position by controlling the electromagnetic reversing valve to make the tundish fall back;

After the disc is running in place, the proximity switch transmits the signal to the PLC controller to form the ladle casting conditions. The PLC controller controls the casting speed of the ladle by sending the set value voltage to the electromagnetic proportional valve;

When casting the anode plate, the tundish pours copper liquid into the casting ladle, and the pouring amount is detected by the load cell. When the set value is reached, the pouring stops. After the casting disc is in place, the casting ladle starts pouring copper liquid, and the PLC controller According to the detection of the weighing sensor, the collected weighing signal is analyzed to control the casting speed of the casting ladle, forming a feedback adjustment on the casting speed, so that the casting speed changes according to the set trajectory.

The method of determining the casting speed at the time point t1 is as follows: starting from the weight value at the time point t1, including the weight value at the time point t1, starting to continuously collect the weight values at multiple time points thereafter, and combining the collected weight values at the time point The weight value calculated by the least square method is used as the speed value at this time t1.

The control of the casting speed reflects the control of the output voltage. The set trajectory includes a plurality of curve segments, and the curve segments include a start-up segment, a waiting segment for copper output, an acceleration segment, an average speed segment, a deceleration segment and a closing segment. For the package section, switch between each casting curve through the state quantity.

The selection method of state quantity is:

After the casting ladle is carried out in the start-up section and kept for 1-4 seconds, it enters the waiting section for copper output;

Wait for the switch between the output section, acceleration section, constant speed section, deceleration section and package receiving section according to the comparison result between the set weight and the actual weight. When the actual weight of each section is greater than or equal to the set weight, it will enter the next step. a curved segment;

The switch between the deceleration section and the packet receiving section takes the weight of the packet receiving point as the switch symbol.

The control voltage of the electromagnetic proportional valve in the start-up section increases at a constant rate of increase first, and then keeps the maximum value unchanged after increasing to the set maximum value, and reaches the waiting copper output section after a delay of the set time;

Wait for the control voltage of the electromagnetic proportional valve in the copper outlet section to decrease at a constant rate, and reach the copper outlet section after decreasing to the set value;

The control voltage of the electromagnetic proportional valve in the copper outlet section keeps the set value unchanged, and reaches the acceleration section after the set delay;

The voltage value of the electromagnetic proportional valve in the acceleration section decreases gradually, and the model formula is an exponential function e^x+f, and enters the constant speed section after reaching the set value;

The constant speed section outputs a constant voltage to the proportional servo valve. At this time, the curve model formula is a constant value g, and it reaches the deceleration section after a set delay;

The voltage output from the deceleration section system to the electromagnetic proportional valve is getting smaller and smaller in order to capture and determine the casting wrapping point. The formula of the curve model is an exponential function h^x+I. After reaching the set value, it increases at a constant rate until it reaches the set value. After setting, it reaches the packet receiving segment;

The voltage output from the receiving section to the electromagnetic proportional valve is rapidly reduced to 0 at a constant rate, so that the copper water flows out as little as possible and the casting error is reduced.

Beneficial effects of the present invention:

High degree of automation, accurate operation, fast and stable response, the addition of feedback control can make the casting process more precise, improve the flexibility of the casting control system, and reduce the use of electrical components through the movement of the PLC control mechanism, enabling the control system The design of the internal structure is simple, which reduces the workload of the design, the wiring is simple, the maintenance is easy, and the use effect of the system and the casting quality of the product are greatly improved.

Description of drawings

Fig. 1 is a structural schematic diagram of an automatic quantitative casting control system for copper anode plates according to the present invention.

Fig. 2 is a main program block diagram of a copper anode plate automatic quantitative casting control system of the present invention.

Fig. 3 is a manual mode program flow chart of the automatic quantitative casting control system for copper anode plates according to the present invention.

Fig. 4 is a flow chart of the functional test program of the automatic quantitative casting control system for copper anode plates according to the present invention.

Fig. 5 is a flow chart of an automatic mode program of an automatic quantitative casting control system for copper anode plates according to the present invention.

Fig. 6 is a flow chart of the electromagnetic proportional valve feedback adjustment of the copper anode plate automatic quantitative casting control system of the present invention.

Fig. 7 is a flow chart of speed feedback adjustment of an automatic quantitative casting control system for copper anode plates according to the present invention.

Fig. 8 is a flow chart of weight feedback adjustment of an automatic quantitative casting control system for copper anode plates according to the present invention.

Fig. 9 is a wiring diagram of a 6-wire sensor of an automatic quantitative casting control system for copper anode plates according to the present invention.

Fig. 10 is a communication wiring diagram between a weighing module and a computer of a copper anode plate automatic quantitative casting control system of the present invention.

Fig. 11 is a schematic diagram of a weighing module weight collection point of an automatic quantitative casting control system for copper anode plates according to the present invention.

Fig. 12 is a casting curve diagram of an automatic quantitative casting control system for copper anode plates according to the present invention.

Among them, 1 PLC controller, 2 touch screen, 3 weighing module, 4 weighing sensor, 5 electromagnetic proportional valve, 6 input unit, 7 proximity switch, 8 control button, 9 frequency converter, 10 motor, 11 output unit, 12 electromagnetic switch Directional valve, 13 pilot lights.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figure 1, a kind of copper anode plate automatic quantitative casting control system, comprises PLC controller 1, and the proximity switch 7 that is installed in the middle cavity of disc connects the input end of PLC controller 1 through input unit 6; The weighing sensor 4 on the base of the bag is connected with the weighing module 3, and the weighing module 3 performs signal conditioning and analog-to-digital conversion on the weighing signal and sends it to the PLC controller 1. The output terminal of the weighing module 3 is also connected with the adjustment casting bag and the The electromagnetic proportional valve 5 of the size of the oil inlet pipe for starting the hydraulic cylinder of the tundish is connected; the PLC controller 1 controls the rotation of the disc drive motor 10 through the frequency converter 9; the PLC controller 1 is connected with the electromagnetic valve installed in the oil inlet pipe of the tundish The reversing valve 12 is connected; the PLC controller 1 is connected with the touch screen 2; the PLC controller 1 calculates the amount of copper poured water according to the weight of the ladle collected by the load cell 4 and generates a speed control signal, which acts on the electromagnetic proportional valve 5, so that The casting speed follows the set trajectory.

Proximity switch 7 comprises limit switch and stop proximity switch. The PLC controller 1 is also connected to a control button 8 via an input unit 6 . The output end of the PLC controller 1 is connected to an indicator light 13 for indicating that the tundish is in place, the casting ladle is in place and the disc is in place. The touch screen 2 is connected to the PLC controller 1 through the RS485 interface. The working state of the copper water casting can be monitored through the touch screen 2, and the parameters of the PLC controller 1 can also be modified and set through the touch screen 2 to adjust the working state of the copper water casting.

In this embodiment, the PLC controller 1 is connected to the electromagnetic reversing valve 12 and the indicator light 13 through the output unit 11 .

The PLC controller 1 is installed inside the operation cabinet, and SIEMENS S7-300 is selected. Siemens 300 series PLC has a modular structure, which has high-speed instruction operation speed, small size, fast CPU operation speed, ample memory, rich range of soft components, and pluggable Install expansion modules to expand input, output and communication.

The touch screen 2 is embedded and installed on the panel of the operation cabinet, and communicates with the PLC controller 1. The communication method between the touch screen 2 and the PLC controller 1 is: interface type RS232, and the connection mode of the communication line is screen (female) 6, 9 , 5——PLC (male) 3, 2, 9, 4 and 5 are short-circuited; at the same time, the working status of the disc casting machine can be monitored through configuration software programming, and the PLC controller 1 can be set on the touch screen 2 to adjust the disc casting machine operating parameters. The touch screen 2 is Kunlun Tongtai TPC1061Ti embedded integrated touch screen 2, and the man-machine interface is compiled through MCGS configuration software.

The weighing module 3 is selected as a function block SIWAREX FTA of SIMATIC S7-300, which can be directly integrated into the S7-300 backplane bus. The installation of the 80mm weigh module 3 requires minimal cabling due to the DIN rail assembly and snap-on technology. The standard 40-pin front connector is used to connect the load cell 4, RS485 serial interface, analog output and digital input and output, and the 9-pin Sub-D plug is used to connect to the PC (RS232). SIWAREX FTA in SIMATIC means a guaranteed full integration of weighing technology into the automation system.

The load cell 4 adopts a pressure sensor. When the elastic body of the load cell 4 is subjected to the force from the direction of gravity of the casting ladle, the elastic body undergoes a corresponding slight deformation. At this time, the bridges of the resistance strain gauges pasted on the elastic body The circuit resistance produces a corresponding change in resistance value. According to the principle of Wheatstone bridge, when a constant excitation voltage is applied to both ends of the resistance strain gauge, the change of the weight of the casting ladle will be reflected in the voltage difference between the two ends of the strain gauge, so that the force can be detected The weight of the casting ladle is thus measured.

Electromagnetic proportional valve 5, the input voltage signal of the proportional electromagnet in the valve produces corresponding actions, which causes the displacement of the valve core of the working valve and the change of the valve port size, and completes the output of pressure and flow proportional to the input voltage. Spool position feedback can be mechanical, hydraulic or electrical. The electro-hydraulic proportional valve is composed of electric and computer-controlled electro-hydraulic system, which has high control precision, flexible installation and use, and strong anti-pollution ability.

Proximity switch 7 is successively installed on the return position of tundish, casting ladle and the mechanism that rotates the internal diameter of disc to determine the position.

The control button 8 is installed on the operation panel of the control cabinet as the digital input signal of the PLC controller 1 .

Inverter 9, using the on-off function of the power semiconductor device to convert the power frequency power supply to another frequency, realize the soft start of the AC asynchronous motor, frequency conversion speed regulation, improve operation accuracy, change power factor, overcurrent/overvoltage/overload protection function.

The electromagnetic reversing valve 12 is installed in the oil inlet pipeline of the tundish, and its switch can be controlled by the PLC controller 1 .

A control method for an automatic quantitative casting control system for copper anode plates, comprising:

As shown in the automatic mode program flow chart in Figure 5, after the system is started, the automatic casting can be started and stopped through the buttons on the control cabinet in the operating room. After the copper water in the molten state flows into the tundish through the chute, when it reaches a certain weight, the PLC controller 1 controls the electromagnetic reversing valve 12 so that the high-pressure oil enters the hydraulic cylinder of the tundish to start the tundish, and the copper water flows into the casting ladle, and the casting The weighing sensor 4 in the weighing device under the package base converts the weight and pressure value of the copper water into a voltage signal and transmits it to the weighing module 3 of the PLC controller 1, and the voltage signal is conditioned, filtered, and converted to an analog-to-digital conversion and transmitted to the upper system For PLC controller 1 CPU to call and process; when the weight of copper water in the casting ladle reaches the set value, PLC controller 1 controls the electromagnetic reversing valve 12 through the output unit 11 to switch the position of the electromagnetic valve to make the tundish fall back;

After waiting for the disk to run in place, the proximity switch 7 will pass the signal to the PLC controller 1 through the input unit 6, thereby forming the casting condition of the ladle. The PLC controller 1 controls the casting of the ladle by sending a specific value voltage to the electromagnetic proportional valve 5 The input voltage signal of the proportional electromagnet in the valve produces corresponding action, the valve core of the working valve is displaced, and the size of the valve port is changed, so as to complete the flow output proportional to the input voltage. The position of the spool can be fed back in the form of mechanical, hydraulic or electric, as shown in Figure 6 the flow chart of the feedback adjustment of the electromagnetic proportional valve. The electro-hydraulic proportional valve is composed of electric and computer-controlled electro-hydraulic systems, with high control precision, flexible installation and use, and strong anti-pollution ability;

When the anode plate is being cast, the tundish pours copper liquid into the casting ladle, and the pouring amount is detected by the ladle weighing sensor 4. When the set value is reached, the pouring is stopped. After the casting disc is in place, the casting ladle starts pouring copper liquid, and The PLC controller 1 analyzes the collected weighing signal according to the detection of the weighing sensor 4 to control the pouring speed of the casting ladle and form a feedback adjustment on the casting speed, as shown in Figure 7. The flow chart of the casting speed feedback adjustment; the weighing sensor 4 Monitor the weight of copper water in the casting ladle in real time, and feed back the weight signal in real time to form a feedback adjustment on the casting weight of copper water, and return quickly when the amount of poured copper water reaches the weight of the bag, so as to achieve accurate and quantitative casting of copper anode plates For the purpose, as shown in Figure 8, the flow chart of copper water casting weight feedback adjustment.

The PLC calculates the amount of copper poured water based on the sampling value of the weight of the casting ladle, generates a speed control signal, and acts on the electro-hydraulic servo regulating valve in the casting hydraulic circuit to make the casting speed follow a given trajectory. For the generation of the speed control signal, the current casting speed must be calculated based on the weight collection value of the casting ladle by the weighing module 3. For the calculation of the casting speed, the weighing module 3 collects the weight of 5 or 10 casting ladles. Point, using the least square method to calculate the velocity value at this moment. To collect the casting speed at this point at a certain time t1, starting from the weight value at time t1 (including the weight value at time t1), start to continuously collect the weight values at the subsequent 5 (or 10) time points, and use the least square method The calculated value is used as the speed value at the time t1, as shown in the schematic diagram of the weight collection point in FIG. 11 .

Given the setting of the trajectory, the curve is coordinated with the weighing sensor signal of the casting scale, and the collected weighing signal of the casting scale is analyzed through the casting mathematical model, and the appropriate voltage is output for each stage of the casting scale through the PLC controller 1. Control the precise movement of the hydraulic cylinder proportional valve of the casting ladle. The output voltage includes 6 stages: start-up stage, waiting for copper out stage, acceleration stage, constant speed stage, deceleration stage, and package receiving stage, as shown in Figure 12 for the voltage (casting speed) curve.

During the process of pouring copper water in the casting ladle, each casting curve is switched through the state quantity, and the state quantity is in the following way:

1) After the casting ladle is carried out in the start-up section and held for 2 seconds, it enters the waiting section for copper discharge;

2) Waiting to switch between the copper output section, acceleration section, constant speed section, deceleration section, and package receiving section based on the comparison results between the set weight and the actual weight. When the actual weight of each section is greater than or equal to the set weight, enter to the next curve segment;

3) The switch between the deceleration section and the packet receiving section takes the weight of the packet receiving point as the switch symbol.

The control voltage of the electromagnetic proportional valve in the start-up section increases at a constant rate of increase first, and then keeps the maximum value unchanged after increasing to the set maximum value, and reaches the waiting copper output section after a delay of the set time;

Wait for the control voltage of the electromagnetic proportional valve in the copper outlet section to decrease at a constant rate, and reach the copper outlet section after decreasing to the set value;

The control voltage of the electromagnetic proportional valve in the copper outlet section keeps the set value unchanged, and reaches the acceleration section after the set delay;

The voltage value of the electromagnetic proportional valve in the acceleration section decreases gradually, and the model formula is an exponential function e^x+f. Since the copper water liquid level in the casting ladle becomes wider, the copper water still flows out quickly, and enters the constant speed section after reaching the set value;

The constant speed section outputs a small constant voltage to the proportional servo valve. At this time, the curve model formula is a constant value g, and it reaches the deceleration section after a set delay;

The voltage output from the deceleration section system to the electromagnetic proportional valve is getting smaller and smaller in order to capture and determine the casting wrapping point. The formula of the curve model is an exponential function h^x+I. After reaching the set value, it increases at a constant rate until it reaches the set value. After setting, it reaches the packet receiving segment;

The voltage output from the receiving section to the electromagnetic proportional valve is rapidly reduced to 0 at a constant rate, so that the copper water flows out as little as possible and the casting error is reduced.

In addition to the above automatic control, the control system can also include a manual control mode and a test function mode.

Manual control mode: As shown in the flow chart of manual mode in Figure 3, after the system starts, select the rotary switch to manual mode. The control switch 8 on the control cabinet in the operation room can send signals to the PLC controller through the input unit 6 to control the dumping and falling of the tundish, the starting and falling of the casting ladle, the forward and reverse rotation of the casting disc machine, etc. It can be switched to manual mode for operation when debugging the equipment and when the automatic mode fails.

Function test mode: as shown in the flow chart of test function mode in Figure 4, when the rotary button is selected to test function mode, the equipment will start the tundish, casting ladle and running disc in sequence under no-load conditions to complete the casting process action. The function of the module is to simulate each link of the entire casting system before the copper water casting starts, so as to detect potential system errors and mechanical failures in advance.

Although the specific implementation of the present invention has been described above in conjunction with the accompanying drawings, it does not limit the protection scope of the present invention. Those skilled in the art should understand that on the basis of the technical solution of the present invention, those skilled in the art do not need to pay creative work Various modifications or variations that can be made are still within the protection scope of the present invention.

Claims (7)

1. A control method of a copper anode plate automatic quantitative casting control system, characterized in that it comprises, After the copper water in the molten state flows into the tundish through the chute, after reaching the set weight, the PLC controller controls the electromagnetic reversing valve so that the high-pressure oil enters the tundish hydraulic cylinder to start the tundish, and the copper water flows into the casting ladle, and the casting ladle The weighing sensor under the base converts the weight and pressure value of copper water into a voltage signal and transmits it to the weighing module. The weighing module conditioned, filtered and converted the voltage signal to the PLC controller for calling and processing; When the weight of the copper water inside reaches the set value, the PLC controller switches the electromagnetic valve position by controlling the electromagnetic reversing valve to make the tundish fall back; After the disc is running in place, the proximity switch transmits the signal to the PLC controller to form the ladle casting conditions. The PLC controller controls the casting speed of the ladle by sending the set value voltage to the electromagnetic proportional valve; When casting the anode plate, the tundish pours copper liquid into the casting ladle, and the pouring amount is detected by the load cell. When the set value is reached, the pouring stops. After the disc is in place, the casting ladle starts pouring copper liquid, and the PLC controller The weighing sensor detects and analyzes the collected weighing signal to control the casting speed of the casting ladle, forming a feedback adjustment on the casting speed, so that the casting speed changes according to the set trajectory; The control of the casting speed reflects the control of the output voltage. The set trajectory includes a plurality of curve segments, and the curve segments include a start-up segment, a waiting segment for copper output, an acceleration segment, a constant speed segment, a deceleration segment and a package receiving segment. Segment, each casting curve is switched through the state quantity; The selection method of the state quantity is: After the casting ladle is carried out in the start-up section and kept for 1-4 seconds, it enters the waiting section for copper output; Wait for the switch between the output section, acceleration section, constant speed section, deceleration section and package receiving section according to the comparison result between the set weight and the actual weight. When the actual weight of each section is greater than or equal to the set weight, it will enter the next step. a curved segment; The switch between the deceleration section and the packet receiving section takes the weight of the packet receiving point as the switching symbol; The control voltage of the electromagnetic proportional valve in the start-up section increases at a constant rate of increase first, and then keeps the maximum value unchanged after increasing to the set maximum value, and reaches the waiting copper output section after a delay of the set time; Wait for the control voltage of the electromagnetic proportional valve in the copper outlet section to decrease at a constant rate, and reach the copper outlet section after decreasing to the set value; The control voltage of the electromagnetic proportional valve in the copper outlet section keeps the set value unchanged, and reaches the acceleration section after the set delay; The voltage value of the electromagnetic proportional valve in the acceleration section decreases gradually, and the model formula is an exponential function e^x+f, and enters the constant speed section after reaching the set value; The constant speed section outputs a constant voltage to the electromagnetic proportional valve. At this time, the curve model formula is a constant value g, and it reaches the deceleration section after a set delay; The voltage output from the deceleration section system to the electromagnetic proportional valve is getting smaller and smaller in order to capture and determine the casting wrapping point. The formula of the curve model is an exponential function h^x+I. After reaching the set value, it increases at a constant rate until it reaches the set value. After setting, it reaches the packet receiving segment; The voltage output from the receiving section to the electromagnetic proportional valve decreases rapidly to 0 at a constant rate. 2. the control method of a kind of copper anode plate automatic quantitative pouring control system as claimed in claim 1, it is characterized in that, the method that obtains to determine the time point t1 pouring speed is, with the weight value at t1 moment as starting point, including the time at t1 moment For the weight value, start to continuously collect the weight values at the subsequent multiple time points, and use the value calculated by the least square method as the speed value at the time t1. 3. the control method of a kind of copper anode plate automatic quantitative casting control system as claimed in claim 1 is characterized in that, comprises PLC controller, and the proximity switch that is installed in the disc middle cavity connects the input end of described PLC controller ; The weighing sensor installed on the base of the casting ladle is connected to the weighing module, and the weighing module performs signal conditioning and analog-to-digital conversion on the weighing signal and sends it to the PLC controller. The output end of the weighing module is also connected to the adjustment casting ladle and The tundish start hydraulic cylinder oil inlet pipe is connected to the electromagnetic proportional valve of the size of the oil inlet; The PLC controller controls the rotation of the disk drive motor through a frequency converter; The PLC controller is connected with the electromagnetic reversing valve installed in the oil inlet pipeline of the tundish; The PLC controller is connected with the touch screen; The PLC controller calculates the amount of copper poured water based on the weight of the casting ladle collected by the load cell and generates a speed control signal, which acts on the electromagnetic proportional valve to make the casting speed follow the set track. 4. The control method of a copper anode plate automatic quantitative casting control system according to claim 3, wherein the proximity switch includes a limit switch and a stop proximity switch. 5. The control method of a kind of copper anode plate automatic quantitative casting control system as claimed in claim 3 or 4, is characterized in that, described PLC controller is also connected with control button. 6. the control method of a kind of copper anode plate automatic quantitative casting control system as claimed in claim 3, it is characterized in that, the output end connection of described PLC controller is used to indicate that tundish returns to the position, the casting ladle returns to the position and Indicator light for puck in place. 7. the control method of a kind of copper anode plate automatic quantitative casting control system as claimed in claim 3, it is characterized in that, described touch screen and PLC controller are connected by RS485 interface communication, can monitor the working state of copper water casting by touch screen, It is also possible to modify and set the parameters of the PLC controller through the touch screen to adjust the working status of copper water casting.