A method for an electro-hydraulic control device to balance the load

Abstract

The present invention provides a method for balancing loads of an electro-hydraulic control device, belonging to the technical field of electro-hydraulic control of hydraulic supports; to solve the problem of large load differences among controllers of the electro-hydraulic control device of hydraulic supports in different working states; the method includes the following steps: extracting devices in the electro-hydraulic control device of hydraulic supports whose working loads change significantly with working states; classifying the devices extracted in step S1 according to the failure danger levels; designing balancing load schemes for different devices according to the divided failure danger levels, the balancing load schemes are analyzed and calculated according to the working characteristics of the electro-hydraulic control device and the proportion of light loads and heavy loads, calculating the minimum energy storage capacity and charging current requirements of the extracted devices, comprehensively obtaining the load values of different extracted devices, and drawing a balancing load circuit according to the load values; calculating the scale of the device according to the configuration of the electro-hydraulic control device and the load conditions of each device; the present invention is applied to the electro-hydraulic control device of hydraulic supports.

Description

Technical Field

[0001] The present invention provides a method for balancing loads of an electro-hydraulic control device, belonging to the technical field of electro-hydraulic control of hydraulic supports. Background Art

[0002] The electro-hydraulic control system of a coal mine hydraulic support changes the past manual control operation into an electronic signal operation controlled by a computer program through electro-hydraulic valves. Sensors at different positions of the hydraulic support transmit signals of the working environment and different states to the computer, and the computer will send control signals to the electro-hydraulic valves according to different working states and technological requirements to achieve the purpose of controlling the equipment on the working face. The electro-hydraulic control system mainly consists of a power supply, a main control console, a support controller (SCU), liquid-electric signal conversion elements (pressure and displacement sensors), an electro-hydraulic control valve group, a hydraulic system, etc. An electro-hydraulic control device of the hydraulic support needs to be set at the underground hydraulic support, and the electro-hydraulic control device of the hydraulic support includes a power supply and a controller, and each load connected to the controller includes a solenoid valve driver, a multi-functional signal lamp, and each sensor.

[0003] At present, the load conditions of the controllers in the electro-hydraulic control device of the hydraulic support change greatly with the working conditions of the equipment (solenoid valve drivers, auxiliary lighting and warning equipment, etc.). After combining multiple controllers with loads to form a hydraulic support control device, the above situation is particularly obvious, resulting in difficulties in selecting the scale of the electro-hydraulic control device of the hydraulic support (that is, how many controllers a power supply with a certain capacity can supply power to, that is, the matching ratio between the power supply and the controller). If the scale is too small, the cost is too high; if the scale is too large, it may cause the device to restart overloaded and lead to danger. Especially when the electro-hydraulic control system of the hydraulic support automatically controls the working process and the device restarts overloaded, it will cause unpredictable problems. Summary of the Invention

[0004] In order to solve the problem of difficult device scale design caused by the unbalanced load differences of each controller of the current electro-hydraulic control device of the hydraulic support in different working states, the present invention proposes a method for balancing the load of the electro-hydraulic control device.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for balancing the load of an electro-hydraulic control device, including the following steps:

[0006] S1: Extraction: Extract the equipment in the electro-hydraulic control device of the hydraulic support whose working load changes significantly with the working state;

[0007] S2: Classification: Classify the equipment extracted in step S1 according to the failure risk level;

[0008] S3: Design of load balancing scheme: Design different load balancing schemes for the devices extracted in step S1 according to the divided failure risk levels. The load balancing scheme is analyzed and calculated based on the working characteristics of the electro-hydraulic control device and the ratio of light load to heavy load, calculate the minimum energy storage capacity and charging current requirements of the extracted devices, comprehensively obtain the load values of different extracted devices, and draw the load balancing circuit according to the load values.

[0009] S4: Calculate the scale of the device according to the configuration of the electro-hydraulic control device and the load conditions of each device.

[0010] The devices with significantly changing working loads extracted in S1 are judged according to the change amplitude of the working current of each device under the working state and the static state. The devices with significantly changing working loads with the working state include solenoid valve drivers and multifunctional signal lights.

[0011] The failure risk device in step S2 is the solenoid valve driver, and the non-failure risk device is the multifunctional signal light.

[0012] The steps for designing the load balancing scheme of the solenoid valve driver are as follows:

[0013] Obtain the width of the hydraulic supports in the fully mechanized coal mining face, the number of hydraulic supports in the fully mechanized coal mining face, set the cutting speed of the shearer, calculate the time for the hydraulic supports to push the scraper conveyor and move the supports, that is, the total time of all actions for the shearer to cut one pass of coal, determine the voltage and current required for the actions of different types of solenoid valves, and calculate the energy storage energy required for the solenoid valve driver to cut one pass of coal according to the total time of all actions for the shearer to cut one pass of coal, the voltage and current required for the solenoid valve actions.

[0014] Calculate the first charging current of the energy storage device according to the solenoid valve energy storage energy and the efficiency of the battery capacity, and use the first charging current as the load balancing value of the solenoid valve driver.

[0015] The steps for designing the load balancing scheme of the multifunctional signal indicator light are as follows:

[0016] Calculate the warning action time and auxiliary lighting time of the multifunctional signal light during the process of cutting one pass of coal, calculate the energy storage energy required for the multifunctional signal light to cut one pass of coal according to the warning action time, auxiliary lighting time of the multifunctional signal light and the solenoid valve action required voltage, calculate the second charging current of the energy storage device according to the multifunctional signal light energy storage energy and the efficiency of the battery capacity, and use the second charging current as the load balancing value of the multifunctional indicator light.

[0017] The calculation formula for the device scale is as follows:

[0018] Device scale = Device power load capacity / Single controller control current within the device, where the single controller control current within the device = First charging current of the energy storage device required for the solenoid valve + Second charging current of the energy storage device required for the multi-functional signal lamp + Operating current of each sensor.

[0019] The balanced load circuit includes a processor control circuit, a charging control circuit, a first discharge control circuit, a second discharge control circuit, a load control circuit, a boost circuit, a buck circuit, and a communication circuit. A battery is integrated in the charging control circuit, and the charging state of the charging control circuit is monitored and controlled through the processor control circuit;

[0020] The processor control circuit is connected to the external power supply input through the buck circuit;

[0021] The input of the charging control circuit is connected to the external power supply input. The output of the charging control circuit is connected to the load control circuit after passing through the second discharge circuit and the boost circuit. The external power supply input is connected to the load control circuit through the first discharge control circuit. The load control circuit is connected to the processor control circuit;

[0022] The processor control circuit directly controls the second discharge control circuit to turn off the output. The output of the first discharge control circuit needs to take effect simultaneously with the charging control circuit;

[0023] The first discharge control circuit and the second discharge control circuit are reversely controlled by the processor control circuit, and only one output is allowed to be effective at the same time.

[0024] The beneficial effects of the present invention compared with the prior art are as follows: The existing electro-hydraulic control device for hydraulic supports has no load balancing design, and the equipment within the device has no function of energy storage and balancing input circuit. The device scale is limited by the peak power of each device. After adding load balancing to the electro-hydraulic control device load balancing method provided by the present invention, the device load situation can be analyzed in the static state, and the device scale can be designed, which is safe and controllable. Brief Description of the Drawings

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] Figure 1 It is the flowchart of the method of the present invention;

[0027] Figure 2 It is the structural schematic diagram of the balanced load circuit of the present invention;

[0028] Figure 3 It is the schematic diagram of the principle of the charging control circuit of the present invention;

[0029] Figure 4 It is the schematic diagram of the principle of the discharge control circuit of the present invention;

[0030] Figure 5This is the schematic diagram of the load control circuit of the present invention. Detailed implementation manners

[0031] As Figures 1 to 5 shown, the present invention provides a method for balancing the load of an electro-hydraulic control device, which solves the problem of large load differences among the controllers of the electro-hydraulic control device of a hydraulic support under different working conditions, and performs static calculation on the device scale after balancing the load, so as to achieve the balance between the economic benefits of the device and the scale design.

[0032] A method for balancing the load of an electro-hydraulic control device includes the following steps:

[0033] S1: Extraction: Extract the devices in the electro-hydraulic control device of the hydraulic support whose working load changes significantly with the working state;

[0034] S2: Classification: Classify the devices extracted in step S1 according to the failure risk level;

[0035] S3: Design of the load balancing scheme: Design the load balancing schemes for different devices according to the divided failure risk levels for the devices extracted in step S1. The load balancing scheme is analyzed and calculated according to the working characteristics of the electro-hydraulic control device and the ratio of light load and heavy load, calculate the minimum energy storage capacity and charging current requirements of the extracted devices, comprehensively obtain the load values of different extracted devices, and draw the load balancing circuit according to the load values;

[0036] S4: Calculate the scale of the device according to the configuration of the electro-hydraulic control device and the load conditions of each device.

[0037] The devices whose working load changes significantly with the working state in S1 are judged according to the change amplitude of the working current of each device under the working state and the static state. The devices whose working load changes significantly with the working state include solenoid valve drivers and multi-functional signal lights.

[0038] The failure risk device in step S2 is the solenoid valve driver, and the non-failure risk device is the multi-functional signal light.

[0039] The steps for designing the load balancing scheme of the solenoid valve driver are as follows:

[0040] Obtain the width of the hydraulic supports in the fully-mechanized coal mining face, the number of hydraulic supports in the fully-mechanized coal mining face, set the cutting speed of the shearer, calculate the time for the hydraulic supports to push the scraper conveyor and move the supports, that is, the total time of all actions for the shearer to cut one pass of coal, determine the voltage and current required for the actions of different types of solenoid valves, and calculate the energy storage energy required for the solenoid valve driver to cut one pass of coal according to the total time of all actions for the shearer to cut one pass of coal, the voltage and current required for the actions of the solenoid valve;

[0041] Calculate the first charging current of the energy storage device according to the energy stored in the solenoid valve and the efficiency of the battery capacity, and use the first charging current as the balanced load value of the solenoid valve driver.

[0042] The design steps of the balanced load scheme for the multifunctional signal indicator are as follows:

[0043] Calculate the warning action time and auxiliary lighting time of the multifunctional signal lamp during the process of cutting one knife of coal. Calculate the energy storage required for the multifunctional signal lamp to cut one knife of coal according to the warning action time, auxiliary lighting time of the multifunctional signal lamp and the required voltage for the solenoid valve action. Calculate the second charging current of the energy storage device according to the energy stored in the multifunctional signal lamp and the efficiency of the battery capacity, and use the second charging current as the balanced load value of the multifunctional indicator.

[0044] The calculation formula for the device scale is as follows:

[0045] Device scale = Device power load capacity / Single controller control current in the device, where the single controller control current in the device = First charging current of the energy storage device required by the solenoid valve + Second charging current of the energy storage device required by the multifunctional signal lamp + Operating current of each sensor.

[0046] The balanced load circuit includes a processor control circuit, a charging control circuit, a first discharge control circuit, a second discharge control circuit, a load control circuit, a boost circuit, a buck circuit and a communication circuit. A battery is integrated in the charging control circuit, and the charging state of the charging control circuit is monitored and controlled through the processor control circuit;

[0047] The processor control circuit is connected to the external power supply input through the buck circuit;

[0048] The input of the charging control circuit is connected to the external power supply input. The output of the charging control circuit is connected to the load control circuit after passing through the second discharge circuit and the boost circuit. The external power supply input is connected to the load control circuit through the first discharge control circuit. The load control circuit is connected to the processor control circuit;

[0049] The processor control circuit directly controls the second discharge control circuit to turn off the output. The output of the first discharge control circuit needs to take effect simultaneously with the charging control circuit;

[0050] The first discharge control circuit and the second discharge control circuit are reversely controlled by the processor control circuit, and only one output is allowed to be effective at the same time.

[0051] The present invention solves the existing technical problems by adopting the following technical solutions, as Figure 1 shown:

[0052] 1. Extraction: Determine the equipment in the electro-hydraulic control device of the hydraulic support whose working load changes significantly with the working state;

[0053] In the electro-hydraulic control device of hydraulic supports, the solenoid valve driver and the multi-functional signal lamp are working loads and are devices that are significantly affected by changes in the working state. Among them, the solenoid valve driver is significantly affected by the change in the number of output actions (the current of one solenoid valve is about 110 mA, and the current is different for different numbers of solenoid valve actions), and the multi-functional signal lamp is significantly affected by the change in the warning state and the auxiliary lighting load (idle state (30 mA) and warning, action (60 mA), auxiliary lighting (200 mA)).

[0054] 2. Classification: According to the equipment with significant load changes with the state in the electro-hydraulic control device of hydraulic supports, the risk levels are: failure-dangerous equipment and failure-non-dangerous equipment. Among them, the solenoid valve driver belongs to failure-dangerous equipment, and the failure of the solenoid valve driver may cause the support to be uncontrollable; the multi-functional signal lamp belongs to failure-non-dangerous equipment, and the failure of the multi-functional signal lamp does not affect the control of the support and belongs to failure-non-dangerous equipment.

[0055] 3. Design: Balanced load scheme and design: According to the equipment with significant load changes with the working state and its risk classification extracted, the balanced load scheme design and circuit design are carried out (mainly divided into two categories), and the following is described according to specific embodiments.

[0056] Design of the balanced load scheme for the solenoid valve driver:

[0057] It is known that the width of the hydraulic support in the working face x = 1.5 m, the coal cutting speed of the coal shearer y < 8 m / min, and the number of hydraulic supports in the working face m >= 100 sets;

[0058] Calculate the time t for pushing the scraper conveyor and moving the support of the hydraulic support (the total time for all actions in cutting one pass of coal). The above total time for all actions in cutting one pass of coal is calculated according to the 30 functions of the hydraulic support (that is, there are 30 actions on one hydraulic support). The pushing action of the scraper conveyor is 10 times, 10 s each time, a total of 100 s, the moving support and spraying actions are 40 s each, a total of 80 s, and other actions are 10 s each, a total of 270 s, and all actions are 450 s).

[0059] The required voltage for the solenoid valve action is calculated according to different models of solenoid valves. In this embodiment, the action voltage V = 12 V and the action current I = 110 mA of the general solenoid valve are selected.

[0060] Then the energy storage energy W of the solenoid valve driver for cutting one pass of coal is W = V * I * t = 12 * 0.11 * 450 = 594 J.

[0061] The energy of the energy storage device needs to meet the energy required for cutting two passes of coal to meet the continuous mining application. The energy storage element is selected as a lithium iron phosphate battery for coal mines, and the battery voltage V1 closest to the system voltage is selected. According to the 80% efficiency conversion, the battery capacity requirement is: Q = 2 * W / V1 / 3600 / 80% = 56 mAH.

[0062] The actual large-scale production of lithium iron phosphate batteries for coal mines is rarely less than 100 mAH, so 100 mAH batteries are selected for actual applications.

[0063] Calculation of the charging current of the energy storage device:

[0064] The time required to cut one pass of coal in the working face needs to ensure that the energy consumed by the energy storage device can be fully replenished to ensure continuous operation.

[0065] The time t1 required to cut one pass of coal > x * m / y = 1.5 * 100 / 8 * 60 = 1125 s (19 min), and the actual time required to cut one pass of coal in the working face is much greater than this value.

[0066] Then the first charging current I1 of the energy storage device = Q / t1 = 56 * 3600 / 787.5 = 179.2 mA.

[0067] The driving output load of a single solenoid valve is about 110 mA. The charging current requirement of the energy storage device is greater than this value, and the charging current is used as the balanced load value of the solenoid valve driver.

[0068] Design of the balanced load scheme for the multifunctional signal light:

[0069] The multifunctional signal light is significantly affected by the warning state and the change of the auxiliary lighting load (idle state (30 mA), warning and action (60 mA), auxiliary lighting (200 mA)).

[0070] Then the warning and action time t2 required for the multifunctional signal light to cut one pass of coal < 160 s (60 s for hydraulic support moving and 100 s for coal plow pushing). Calculated according to the multifunctional signal light being illuminated 4 times when cutting one pass of coal, the auxiliary lighting time t3 = 4 * x / y = 4 * 1.5 / 8 / 60 = 45 s.

[0071] Then the stored energy W1 of the multifunctional signal light when cutting one pass of coal = V * t2 * 60 + V * t3 * 200 = 223.2 J.

[0072] The energy of the energy storage device needs to meet the energy required for cutting two passes of coal to meet the continuous mining application. The energy storage element selects a lithium iron phosphate battery for coal mines, and the battery voltage V1 closest to the system voltage is selected. Calculated according to an 80% efficiency conversion, the battery capacity requirement: Q2 = 2 * W1 / V1 / 3600 / 80% = 21 mAH.

[0073] The actual large-scale production of lithium iron phosphate batteries for coal mines is rarely less than 100 mAH, so 100 mAH batteries are selected for actual applications.

[0074] The second charging current I2 of the energy storage device = Q2 / t1 = 21 * 3600 / 787.5 = 96 mA.

[0075] 4. Calculation: Device scale calculation:

[0076] After the solenoid valve driver balances the load, the working current is calculated as 179.2 mA, and after the multi-functional signal lamp balances the load, the working current is calculated as 96 mA. Other devices are statistically analyzed according to their respective currents.

[0077] Device scale = Device power load capacity / Single controller control current within the device, where the single controller control current within the device includes the working currents of sensors, solenoid valve drivers, and multi-functional signal lamps.

[0078] The design of the load balancing circuit for the solenoid valve driver and the multi-functional signal lamp is completed according to the following circuit principles.

[0079] The principle of the load balancing circuit of the present invention is as Figure 2 shown. The charging control circuit integrates a battery and is designed with a maximum charging current to determine the maximum load of the device. The buck circuit, communication circuit, and processor control circuit are the stable load circuit parts. The maximum charging current and the stable load circuit determine the device's load balancing requirements.

[0080] The second discharge control circuit is controlled by the AND logic output of the charging control circuit and the processor control circuit, and there is no power supply input to the second discharge control circuit.

[0081] The processor control circuit can directly control the second discharge control circuit to turn off the output, and the output of the first discharge control circuit needs to be effective simultaneously with the charging control circuit. After the device is powered off, the battery does not work externally, extending its service life.

[0082] The first discharge control circuit and the second discharge control circuit are controlled in reverse by the processor control circuit, and only one output is allowed to be effective at the same time. When the load is light, the load is powered by the first discharge control circuit, and when the load is heavy (exceeding the load balancing current requirement), the load is powered by the second discharge control circuit. Unnecessary battery charge and discharge processes are reduced, extending the battery life. The processor control circuit can control and monitor the charging, reducing the battery charging cycle and extending the battery life.

[0083] The principle design of the load balancing circuit for the solenoid valve driver and the load balancing circuit for the multi-functional signal lamp are selected from Figures 3 - 5 the charging control circuit, the discharge control circuit, and the load control circuit as needed.

[0084] Figure 3It is a charging control circuit. The source of P3 is the processor control circuit. When it is at a high level, Q3 conducts, Q2 conducts, and the U1 charging chip is powered to enable the charging function. When P3 is at a low level, Q3 is cut off, Q2 is cut off, and the U1 has no power supply source and the charging function is turned off. Rcs determines the maximum charging current and the balanced load value. Other charging chips have similar current limiting functions. Pins 4 and 3 of the U1 chip are charging status signals, which can be collected by the processor control circuit. The BAT battery voltage can be collected by the processing circuit.

[0085] Figure 4 It is a discharging control circuit. Among them, CTL is the processor control circuit that switches whether VCC_12 is powered by the battery or the input power supply. When CTL is at a high level, Q3 conducts, Q1 conducts, and the source of VCC_12 is VCC_1. Q4 is cut off, Q2 is cut off, and the battery -> boost power supply is cut off. When CTL is at a low level, Q3 is cut off, Q1 is cut off, and the path of the source of VCC_12 to VCC_1 is cut off. Q4 conducts, Q2 conducts, the battery supplies power to the boost circuit, and the source of VCC_12 is the battery. The CTL control pin realizes the mutually exclusive output of the discharging control circuit and the second discharging control circuit, and the processing circuit is controllable.

[0086] The actual working conditions of the working face are lighter and more uniform than the designed load conditions in the embodiments of the present invention (the actual coal mining speed is smaller than the theoretical maximum value, and the solenoid valve actions are also relatively scattered). Especially during the maintenance shift, there is basically no heavy load demand, and the energy storage device is in a fully charged state for a long time. The processor control circuit can turn off the battery load power supply according to the collected battery status and voltage, and supply power through the discharging circuit (input direct output), increasing the battery life. When the external power supply of VCC1 is disconnected, Q4 is cut off, Q2 is cut off, and the battery power supply is cut off. The function of cutting off the battery load after the external power supply is cut off is realized, and the battery load is only self-discharged without other losses.

[0087] Figure 5 It is a load control circuit. The load control circuit is selected according to the classification of the device danger level. The solenoid valve driver and other faulty and dangerous devices must select this circuit. For faulty non-dangerous devices, this circuit is designed as an optional item. Among them, CTL2 is controlled by the processor control circuit. When CTL2 is at a high level, Q5 conducts, Q6 conducts, and VCC_12 is output to the final load demand VOUT. When CTL2 is at a low level, Q5 is cut off, Q6 is cut off, and the final load demand VOUT is turned off.

[0088] Regarding the specific structure of the present invention, it should be noted that the connection relationships between the various component modules adopted by the present invention are definite and achievable. Except for the special descriptions in the embodiments, the specific connection relationships can bring corresponding technical effects and, on the premise of not relying on the execution of corresponding software programs, solve the technical problems proposed by the present invention. The models of the components, modules, and specific components, the connection methods between them, and the conventional usage methods and predictable technical effects brought by the above technical features, except for the specific descriptions, all belong to the publicly disclosed content in patents, journal papers, technical manuals, technical dictionaries, and textbooks that those skilled in the art can obtain before the filing date, or belong to the prior art such as the conventional techniques and common general knowledge in the art, and do not need to be elaborated. This makes the technical solution provided in this case clear, complete, and achievable, and can reproduce or obtain the corresponding physical product based on this technical means.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for balancing loads of an electro-hydraulic control device, characterized in that: It includes the following steps: S1: Extraction: Extract the devices in the electro - hydraulic control device of the hydraulic support whose working load changes significantly with the working state. The devices whose working load changes significantly with the working state include solenoid valve drivers and multi - functional signal lights; S2: Classification: Classify the devices extracted in step S1 according to the fault - danger level. The fault - dangerous device is the solenoid valve driver, and the fault - non - dangerous device is the multi - functional signal light; S3: Design of balanced load scheme: Design the balanced load schemes for different devices according to the divided fault - danger levels of the devices extracted in step S1. The balanced load scheme is analyzed and calculated based on the working characteristics of the electro - hydraulic control device and the ratio of light load and heavy load, calculate the minimum energy storage capacity and charging current requirements of the extracted devices, comprehensively obtain the load values of different extracted devices, and draw the balanced load circuit according to the load values; The steps for designing the balanced load scheme of the solenoid valve driver are as follows: Obtain the width of the hydraulic supports in the fully - mechanized coal mining face, the number of hydraulic supports in the fully - mechanized coal mining face, set the coal - cutting speed of the shearer, calculate the time for the hydraulic supports to push the scraper conveyor and move the supports, that is, the total time of all actions when the shearer cuts one pass of coal. Determine the voltage and current required for the actions of different types of solenoid valves, and calculate the energy storage required for the solenoid valve driver to cut one pass of coal according to the total time of all actions when the shearer cuts one pass of coal, the voltage and current required for the solenoid valve actions; Calculate the first charging current of the energy storage device according to the energy storage of the solenoid valve and the efficiency of the battery capacity, and use the first charging current as the balanced load value of the solenoid valve driver; The steps for designing the balanced load scheme of the multi - functional signal light are as follows: Calculate the warning action time and auxiliary lighting time of the multi - functional signal light during the process of cutting one pass of coal. Calculate the energy storage required for the multi - functional signal light to cut one pass of coal according to the warning action time, auxiliary lighting time of the multi - functional signal light and the solenoid valve action - required voltage. Calculate the second charging current of the energy storage device according to the energy storage of the multi - functional signal light and the efficiency of the battery capacity, and use the second charging current as the balanced load value of the multi - functional signal light; S4: Calculate the scale of the device according to the configuration of the electro - hydraulic control device and the load conditions of each device.

2. The method for balancing loads of an electro-hydraulic control device according to claim 1, wherein: The device extracted in S1 whose working load changes significantly with the working state is judged according to the change amplitude of the working current of each device between the working state and the static state.

3. A method for balancing loads of an electro-hydraulic control device according to claim 1, characterized in that: The calculation formula for the scale of the device is as follows: Device scale = Device power supply load capacity / Single - controller control current in the device, where the single - controller control current in the device = First charging current of the energy storage device required by the solenoid valve + Second charging current of the energy storage device required by the multi - functional signal light + Working current of each sensor.

4. A method for balancing loads of an electro-hydraulic control device according to claim 1, characterized in that: The balanced load circuit includes a processor control circuit, a charging control circuit, a first discharge control circuit, a second discharge control circuit, a load control circuit, a boost circuit, a buck circuit and a communication circuit. A battery is integrated in the charging control circuit, and the charging state of the charging control circuit is monitored and controlled through the processor control circuit; The processor control circuit is connected to the external power supply input through the buck circuit; The input of the charging control circuit is connected to an external power supply input. The output of the charging control circuit is connected to the load control circuit after passing through the second discharge circuit and the boost circuit. The external power supply input is connected to the load control circuit through the first discharge control circuit. The load control circuit is connected to the processor control circuit; The processor control circuit directly controls the second discharge control circuit to turn off the output. The output of the first discharge control circuit needs to take effect simultaneously with the charging control circuit; The first discharge control circuit and the second discharge control circuit are controlled in reverse by the processor control circuit, and only one output is allowed to be effective at the same time.

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