Intelligent automatic control method of large high-pressure double-roller sand making machine

Abstract

This invention discloses an intelligent automated control method for a large-scale high-pressure double-roller sand making machine, relating to the field of sand making equipment control technology. The control process is as follows: (i) Equipment Start-up: A. Control Mode Selection; B. Setting Control Parameters: a. Setting Lubrication Control Parameters; b. Setting Main Motor Start / Stop Control Parameters; c. Setting Material Waiting Mode Control Parameters; d. Setting Mode Conversion Mechanism Control Parameters; e. Setting Sand Making Mode Control Parameters; C. Starting the Main Motor; (ii) Entering Material Waiting Mode; (iii) Entering Mode Conversion Mechanism; (iv) Entering Sand Making Mode; (v) Equipment Stopping. Sand making equipment controlled by this method can reduce the labor intensity and skill requirements of operators, and possesses characteristics such as energy saving, safety and reliability, and high-quality sand production. It is suitable for the automated control of large-scale high-pressure double-roller sand making machines using various sand-making raw materials to produce manufactured sand.

Description

Technical Field

[0001] This invention relates to the field of sand making equipment control technology, and in particular to an intelligent automated control method for a large high-pressure double-roll sand making machine. Background Technology

[0002] In recent years, high-pressure single-drive double roller mills have been used more and more widely, especially in the field of manufactured sand crushing.

[0003] Currently, large-scale high-pressure single-drive double-roll sand making machines basically include a main motor, reducer, frame, drive roller, driven roller, hydraulic station, oil cylinder, feeding device, thin oil station, and lubrication device. Among them, the main motor provides rotational power to the drive roller through the reducer, the frame supports the drive roller and driven roller, the oil cylinder is installed on the rear side of the driven roller, and the control system controls the extension and retraction of the oil cylinder through the hydraulic station to realize the forward and backward movement of the driven roller, and ensures its sand making pressure during the sand making process.

[0004] However, since this type of large high-pressure double-roll sand making machine with single drive needs to meet the requirements of stable operation and stable sand quality during load operation, and the stable operation of the sand making machine includes the stability of each mechanical structure, the stability of the main motor, the stability of the double-roll pressure, the stability of the thin oil station, the normal temperature of each bearing, and the normal operation of each auxiliary equipment, it is a relatively difficult problem to achieve its automated control.

[0005] Chinese patent (patent application number 202110720963.9) discloses "An Intelligent Control Method for Balanced Crushing in a Medium and Fine Crushing Workshop of Mechanized Sand and Gravel." This method uses a pre-set intelligent control judgment table in the control system of the intelligent control center. It collects level gauge data in real time and compares it with the set control range. When a deviation occurs, the conveyor belt's feeding rate is adjusted to ensure the ore filling amount in the crusher is within the level gauge's control range. Simultaneously, it monitors the feeding relationship and conveying rate of each feeding point on the conveyor belt, the discharge conveying rate, and the crusher's operating current in real time. Each parameter has a set control deviation range. When the deviation exceeds the range, the frequency parameter of the feeder is adjusted according to the judgment standard of the intelligent control judgment table to maintain each parameter within the allowable deviation range. Through intelligent monitoring and control of process parameters, the balanced operation of the system can be effectively ensured, thereby achieving the process goal of green, efficient, and low-consumption shaping and crushing. It realizes intelligent control of each piece of equipment, reduces labor costs, and ensures the consistency of product quality in the medium and fine crushing processes, laying the foundation for high-quality sand and gravel processing.

[0006] Another Chinese patent (patent application number 201710306337.9) discloses "An intelligent control system and control method for crushing and screening equipment." This system includes a data acquisition module and an intelligent control module. The data acquisition module includes a three-phase wattmeter and a current transformer. The intelligent control module includes an intelligent control device and a PID controller. The input terminal of the three-phase wattmeter is connected to the control circuit of the discharge and return conveyor motors of the crushing and screening equipment. The input terminal of the current transformer is connected to the motor control circuit of the crushing and screening equipment. The output terminals of the three-phase wattmeter and the current transformer are connected to the input terminal of the intelligent control device. The output terminal of the intelligent control device is connected to the input terminal of the PID controller. The output terminal of the PID controller is connected to the input terminal of the frequency converter of the crushing and screening equipment. This system can automatically find the optimal operating state of the medium and fine crushing equipment and control the equipment operation through these parameters to ensure the equipment is always in a high-efficiency operating state.

[0007] There is also a Chinese patent (patent application number 202210047999.X) disclosing "An Intelligent Control System and Method for Excavator Crushing Operation". This invention includes: an information acquisition module for acquiring operating condition information and processing the information to obtain operating condition parameters; a power parameter setting module for calculating and setting power parameters based on the obtained operating condition parameters; an overflow valve pressure matching module; a crushing and main pump flow detection module; an output power calculation module; a power judgment module; and a main pump output flow control module. Through overall improvements, this invention can adjust the pressure of the crushing system controlled by the overflow valve, enabling the entire system to adjust the crushing pressure for different operating conditions, achieving a perfect match between pressure and operating conditions, ensuring perfect power utilization and production efficiency. By setting different operating mode through the program, the pressure and power are perfectly matched to the operating conditions, achieving the goal of high efficiency and energy saving. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a control method for a large-scale high-pressure single-drive double-roller sand making machine. The method can judge and decide the equipment to switch to the corresponding preset operating mode based on the automatically detected equipment operating status. The sand making equipment controlled by the method can reduce the labor intensity and skill requirements of the operators, and has the advantages of energy saving, safety and reliability, and good sand quality.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is to invent an intelligent automated control method for a large-scale high-pressure double-roll crusher, which uses an automatic control system and the control process is as follows:

[0010] (i) Equipment startup:

[0011] A. Control mode selection;

[0012] B. Set control parameters:

[0013] a. Set lubrication control parameters;

[0014] b. Set the main motor start / stop control parameters;

[0015] c. Set the material waiting mode control parameters;

[0016] d. Set the control parameters for the mode switching mechanism;

[0017] e. Set the sand making mode control parameters;

[0018] C. Start the main motor;

[0019] (ii) Enter the material waiting mode;

[0020] (iii) Entry mode switching mechanism;

[0021] (iv) Enter sand making mode;

[0022] (v) Equipment shutdown.

[0023] The lubrication control parameters include the gear oil temperature control parameters of the thin oil station and the control parameters of the automatic lubrication device;

[0024] The gear oil temperature control parameters of the thin oil station include: heating temperature start value THStart and heating temperature stop value THStop, as well as cooling temperature start value TCStart and cooling temperature stop value TCStop;

[0025] The control parameters of the automatic lubrication device include: automatic lubrication time interval TCount and single lubrication duration TLong.

[0026] The main motor start / stop control parameters include the main motor start delay TStart and the main motor stop delay TStop.

[0027] The material waiting mode control parameters include: the contact pressure value Sd between the active roller and the driven roller, the contact pressure compensation value Ss, and the contact pressure relief value Sc.

[0028] The mode switching mechanism control parameters include: high threshold for material angle HUp, material angle determination delay time Tys, low threshold for no-material angle HLow, and no-material angle determination delay time Tws.

[0029] The control parameters for the sand making mode include: control parameters for sand making mode one, control parameters for sand making mode two, control parameters for sand making mode three, and control parameters for sand making mode four.

[0030] The control parameters for the sand making mode one include: the lower limit of the current range ALow1, the upper limit of the current for sand making mode one AUp1, the target pressure value for sand making mode one SP11, the pressure holding value for sand making mode one SP12, and the upper limit of the pressure for sand making mode one SP13.

[0031] The control parameters for sand making mode 2 include: lower limit of current range ALow2, upper limit of current for sand making mode 2 AUp2, target pressure value for sand making mode 2 SP21, pressure holding value for sand making mode 2 SP22, and upper limit of pressure for sand making mode 2 SP23.

[0032] The control parameters for the three sand-making modes include: the lower limit of the current range ALow3, the upper limit of the current for the three sand-making modes AUp3, the target pressure value for the three sand-making modes SP31, the pressure holding value for the three sand-making modes SP32, and the upper limit of the pressure for the three sand-making modes SP33.

[0033] The control parameters for the fourth sand making mode include: the lower limit of the current range ALow4, the upper limit of the current for the fourth sand making mode AUp4, the target pressure value for the fourth sand making mode SP41, the pressure holding value for the fourth sand making mode SP42, and the upper limit of the pressure for the fourth sand making mode SP43.

[0034] The current parameters of each sand making mode have the following logical relationship: ALow1≤AUp1≤ALow2≤AUp2≤ALow3≤AUp3≤ALow4≤AUp4.

[0035] The main starter motor includes:

[0036] ① Oil temperature detection:

[0037] When the equipment starts, the thin oil station circulation pump starts immediately. The automatic control system first compares the detected thin oil station gear oil temperature with the set value: when the thin oil station gear oil temperature is lower than the heating temperature start value THStart, the thin oil station gear oil heating device starts heating to raise the temperature, and stops heating when the heating temperature stops at the heating temperature stop value THstop; when the thin oil station gear oil temperature is higher than the cooling temperature start value TCStart, the thin oil station gear oil cooling device starts cooling, and stops cooling when the temperature drops to the cooling temperature stop value TCStop.

[0038] ② Delayed start of main motor:

[0039] When the gear oil temperature of the thin oil station is between the heating temperature start value THStart and the cooling temperature start value TCStart, the thin oil station circulation pump pumps the thin oil station gear oil into the reducer. After the set main motor start delay TStart time, the main motor starts. At the same time, the automatic control system accumulates the main motor running time, the hydraulic station and oil cylinder also start working, and the equipment enters the material waiting mode.

[0040] The material waiting mode is:

[0041] When the main motor starts, the hydraulic cylinder begins to work, and contact pressure is formed between the driving roller and the driven roller. When the contact pressure is less than the contact pressure compensation value Ss, the automatic control system controls it to increase the pressure to the contact pressure value Sd; when the contact pressure is greater than the contact pressure relief value Sc, the automatic control system controls it to decrease the pressure to the contact pressure value Sd; thereafter, the equipment enters the mode switching mechanism.

[0042] The mode conversion mechanism includes:

[0043] ① Comparison from the perspective of content:

[0044] After the equipment enters the mode switching mechanism, it first performs a comparison of the material-containing angle. When the detected tilt angle measurement value exceeds the material-containing angle high threshold HUp, the automatic control system starts accumulating time. When the accumulated time is greater than the material-containing angle determination delay time Tys, the automatic control system controls the equipment to enter the material-free angle comparison and interrupts the accumulating time. When the accumulated time is less than the material-containing angle determination delay time Tys, the automatic control system controls the equipment to return to the waiting-for-material mode and interrupts the accumulating time.

[0045] ② Comparison of angles without material:

[0046] After the equipment enters the no-material angle comparison, when the detected tilt angle measurement value is higher than the no-material angle low threshold HLow, the automatic control system starts to accumulate time. When the accumulated time is greater than the no-material angle determination delay time Tws, the automatic control system controls the equipment to enter the sand making mode and interrupts the accumulated time. When the accumulated time is less than the no-material angle determination delay time Tws, the automatic control system controls the equipment to return to the waiting mode and interrupts the accumulated time.

[0047] The sand making mode is:

[0048] After the equipment enters the sand making mode, the main motor current value is compared. When the main motor current value is between the lower limit of the current range ALow1 and the upper limit of the current range ALow1 in sand making mode one, the automatic control system controls the equipment to switch to sand making mode one, and automatically controls the pressure value between the active roller and the driven roller to be between the pressure holding value SP12 and the pressure upper limit value SP13 in sand making mode one, and to be as close as possible to the pressure target value SP11 in sand making mode one.

[0049] Similarly, when the main motor current value is between the lower limit and the upper limit of the current range of sand making mode 2, sand making mode 3, or sand making mode 4, the automatic control system switches the control equipment to the corresponding sand making mode 2, sand making mode 3, or sand making mode 4, and automatically controls the pressure value between the active roller and the driven roller to be between the pressure holding value and the upper limit of the corresponding sand making mode 2, sand making mode 3, or sand making mode 4, and to be as close as possible to the pressure target value.

[0050] When the current value of the main motor is not between the lower limit and the upper limit of the current range of the above-mentioned sand making mode 1, sand making mode 2, sand making mode 3, or sand making mode 4, the automatic control system directly switches the control equipment to sand making mode 1.

[0051] The conversion of the above-mentioned sand making mode is carried out dynamically throughout the entire sand making process;

[0052] Furthermore, throughout the entire sand-making mode, the automatic control system will dynamically perform a no-material angle comparison. When the duration for which the detected inclination angle measurement value is continuously lower than the no-material angle low threshold HLow is less than the no-material angle determination delay time Tws, the automatic control system will keep the equipment in the sand-making mode. When the duration for which the detected inclination angle measurement value is continuously lower than the no-material angle low threshold HLow is greater than the no-material angle determination delay time Tws, the automatic control system will automatically control the equipment to exit the no-material angle comparison step and reduce the contact pressure between the active roller and the driven roller to the contact pressure value Sd.

[0053] After the main motor starts, an automatic lubrication system is also provided. The automatic lubrication system is as follows:

[0054] When the accumulated main motor running time of the automatic control system reaches the set lubrication time interval TCount, the automatic control system will control the lubrication device to lubricate the bearings of the drive roller and the driven roller. The lubrication time is the set single lubrication duration TLong.

[0055] After the lubrication time is up, the automatic control system will automatically reset the accumulated time and wait for the next automatic lubrication.

[0056] The device stops when:

[0057] When the equipment needs to be stopped, the automatic control system first controls the hydraulic cylinder to retract via the hydraulic station, causing the driven roller to retract and the hydraulic station to stop working; then, after the main motor stop delay TStop time, the main motor stops running, and at the same time, the thin oil station and lubrication device also stop working.

[0058] The intelligent automated control method for a large-scale high-pressure double-roll crusher of the present invention has the following positive effects compared with existing similar technologies:

[0059] First, it enables interlocking operations during equipment start-up and shutdown, reducing the intensity of personnel operations and skill requirements.

[0060] Secondly, it can intelligently judge the material receiving status of the equipment and put the equipment into the corresponding mode according to the result. When no material is received, the equipment enters the waiting mode, which saves energy and ensures that the rollers are in a low-pressure contact state, thus ensuring equipment safety. When material is received, the equipment enters the sand making mode. Through adaptive adjustment of pressure, it can ensure that the rollers are in a suitable pressure range, thereby improving the primary sand production rate, reducing the powder production rate, and increasing production capacity. At the same time, because it reduces roller wear, it extends the life of the rollers, thereby reducing consumable costs.

[0061] Third, it has achieved unmanned operation of the entire process of large-scale high-pressure single-drive double-roller sand making machine, which greatly reduces the labor intensity of personnel.

[0062] Fourth, it is easy to operate. Even if the operator is not very familiar with the system, the equipment will not be damaged due to operational errors, which greatly reduces the skill requirements of the operator.

[0063] Fifth, all process parameters are settable, and corresponding process parameters can be set according to different types of materials to ensure the quality of sand production.

[0064] Sixth, it is easy to modify and optimize, and other control variables can be added if needed, making it scalable.

[0065] Seventh, it has multiple remote operation interfaces to meet the needs of remote operation both locally and in the cloud.

[0066] According to tests, the large high-pressure double-roll sand making machine controlled by the intelligent automated control method of this invention has an hourly capacity increase of about 5-10%, a powder yield (i.e., scrap rate) decrease of about 3-6%, an extended roller skin service life of about 180-200 hours, and a material cost reduction of 0.15-0.20 yuan / ton compared to the same type of large high-pressure double-roll sand making machine controlled by manual control system or other control methods. Attached Figure Description

[0067] Figure 1 This is a simplified diagram of the control principle module of the present invention. Detailed Implementation

[0068] The present invention will be further described below with reference to the accompanying drawings and embodiments. The following description is by way of example, but the scope of protection of the present invention should not be limited thereto.

[0069] Example:

[0070] The intelligent automated control method for the large high-pressure double-roll sand making machine in this embodiment applies to a large high-pressure single-drive double-roll sand making machine, which includes a main motor, reducer, frame, drive roller, driven roller, hydraulic station, oil cylinder, feeding device, thin oil station and lubrication device (including thin oil station circulation pump and oil pipe), as well as a manual control system and an automatic control system. The main motor provides rotational power to the drive roller through the reducer. The frame supports the drive roller and driven roller. The oil cylinder is installed on the rear side of the driven roller. The manual control system or automatic control system controls the extension and retraction of the oil cylinder through the hydraulic station to realize the forward and backward movement of the driven roller and ensure its sand making pressure during the sand making process.

[0071] The automatic control system also includes those connected via communication lines:

[0072] Central controller (i.e., PLC);

[0073] A gear oil temperature sensor, a gear oil refrigeration device, and a gear oil heating device are installed in the thin oil station.

[0074] The main motor current sensor is installed in the main motor control circuit.

[0075] Pressure sensors installed in the hydraulic station;

[0076] An angle sensor installed in the feeding device;

[0077] Due to the different specifications of equipment and different sand-making raw materials, the operating conditions of the equipment are different. Therefore, the following uses two single-drive double-roller sand making machines of model 16100 (roller assembly diameter 1600mm, width 1000mm), which use a 10KV voltage and a 710KW high-voltage motor (rated current) and a 380V voltage and a 710KW low-voltage motor respectively, with granite as the sand-making raw material, to explain in detail the intelligent automatic control principle and process of this embodiment.

[0078] The control process is as follows:

[0079] I. Equipment Start-up:

[0080] (i) Select control mode: Press the device start button and select automatic control mode on the central controller;

[0081] (ii) Setting Control Parameters: Various control parameters are set on the central controller, including (the specific index values ​​of each control parameter are shown in Table 1 below):

[0082] 1. Set lubrication control parameters:

[0083] (1) Set the gear oil temperature control parameters for the thin oil station:

[0084] ① Set the heating temperature start value THStart and the heating temperature stop value THStop;

[0085] ② Set the cooling temperature start value TCStart and the cooling temperature stop value TCStop;

[0086] (2) Set the control parameters for the automatic lubrication device:

[0087] ① Set the automatic lubrication time interval TCount;

[0088] ② Set the single lubrication duration TLong.

[0089] 2. Set the main motor start / stop control parameters:

[0090] (1) Set the main motor start delay TStart;

[0091] (2) Set the main motor stop delay TStop.

[0092] 3. Set the material waiting mode control parameters:

[0093] (1) Set the contact pressure value Sd between the driving roller and the driven roller;

[0094] (2) Set the contact pressure compensation value Ss;

[0095] (3) Set the contact pressure relief value Sc.

[0096] 4. Configure mode switching mechanism control parameters:

[0097] (1) Set the high threshold HUp for the material angle;

[0098] (2) Set the material angle determination delay time Tys;

[0099] (3) Set the low threshold HLow for the no-material angle;

[0100] (4) Set the delay time Tws for determining the angle without material.

[0101] 5. Set the control parameters for the sand making mode:

[0102] (1) Set the control parameters for sand making mode one:

[0103] ① Set the lower limit of the current range ALow1 and the upper limit of the current in sand making mode 1, AUp1;

[0104] ② Set the target pressure value SP11, the pressure holding value SP12, and the upper limit pressure value SP13 for sand making mode 1;

[0105] (2) Set the control parameters for sand making mode two:

[0106] ① Set the lower limit of the current range ALow2 and the upper limit of the current in sand making mode 2, AUp2;

[0107] ② Set the target pressure value SP21, the pressure holding value SP22, and the upper limit pressure value SP23 for sand making mode 2;

[0108] (3) Set the control parameters for sand making mode three:

[0109] ① Set the lower limit of the current range ALow3 and the upper limit of the current in sand making mode three ALow3;

[0110] ② Set the target pressure value SP31, the pressure holding value SP32, and the upper limit value SP33 for the three pressures in the sand making mode;

[0111] (4) Set the control parameters for sand making mode four:

[0112] ① Set the lower limit of the current range ALow4 and the upper limit of the current in sand making mode four ALow4;

[0113] ② Set the target pressure value SP41, the pressure holding value SP42, and the upper limit pressure value SP43 for sand making mode four.

[0114] (iii) Start the main motor;

[0115] 1. Oil temperature detection:

[0116] When the equipment starts, the thin oil station circulation pump starts immediately. The automatic control system first compares the detected thin oil station gear oil temperature with the set value: when the thin oil station gear oil temperature is lower than the heating temperature start value THStart, the thin oil station gear oil heating device starts heating to raise the temperature, and stops heating when the heating temperature stops at the heating temperature stop value THstop; when the thin oil station gear oil temperature is higher than the cooling temperature start value TCStart, the thin oil station gear oil cooling device starts cooling, and stops cooling when the temperature drops to the cooling temperature stop value TCStop.

[0117] 2. Delayed start of main motor:

[0118] When the gear oil temperature of the thin oil station is between the heating temperature start value THStart and the cooling temperature start value TCStart, the thin oil station circulation pump pumps the thin oil station gear oil into the reducer. After the set main motor start delay TStart time, the main motor starts. At the same time, the automatic control system accumulates the main motor running time, the hydraulic station and oil cylinder also start working, and the equipment enters the material waiting mode.

[0119] 3. Automatic lubrication:

[0120] After the main motor starts, the automatic control system will automatically accumulate the main motor running time. When the main motor running time accumulated by the automatic control system reaches the set lubrication time interval TCount, the automatic control system will control the lubrication device to lubricate the bearings of the drive roller and the driven roller. The lubrication time is the set single lubrication time TLong.

[0121] After the lubrication time is up, the automatic control system will automatically reset the accumulated time and wait for the next automatic lubrication.

[0122] II. Entering the material waiting mode:

[0123] When the main motor starts, the hydraulic cylinder begins to work, and contact pressure is formed between the driving roller and the driven roller. When the contact pressure is less than the contact pressure compensation value Ss, the automatic control system controls it to increase the pressure to the contact pressure value Sd; when the contact pressure is greater than the contact pressure relief value Sc, the automatic control system controls it to decrease the pressure to the contact pressure value Sd; thereafter, the equipment enters the mode switching mechanism.

[0124] III. Entry Mode Switching Mechanism:

[0125] 1. Comparison from a material perspective:

[0126] After the equipment enters the mode switching mechanism, it first performs a comparison of the material-containing angle. When the detected tilt angle measurement value exceeds the material-containing angle high threshold HUp, the automatic control system starts accumulating time. When the accumulated time is greater than the material-containing angle determination delay time Tys, the automatic control system controls the equipment to enter the material-free angle comparison and interrupts the accumulating time. When the accumulated time is less than the material-containing angle determination delay time Tys, the automatic control system controls the equipment to return to the waiting-for-material mode and interrupts the accumulating time.

[0127] 2. Comparison of angles without material:

[0128] After the equipment enters the no-material angle comparison, when the detected tilt angle measurement value is higher than the no-material angle low threshold HLow, the automatic control system starts to accumulate time. When the accumulated time is greater than the no-material angle determination delay time Tws, the automatic control system controls the equipment to enter the sand making mode and interrupts the accumulated time. When the accumulated time is less than the no-material angle determination delay time Tws, the automatic control system controls the equipment to return to the waiting mode and interrupts the accumulated time.

[0129] IV. Entering Sand Making Mode:

[0130] After the equipment enters the sand making mode, the main motor current value is compared. When the main motor current value is between the lower limit of the current range ALow1 and the upper limit of the current range ALow1 in sand making mode one, the automatic control system controls the equipment to switch to sand making mode one, and automatically controls the pressure value between the active roller and the driven roller to be between the pressure holding value SP12 and the pressure upper limit value SP13 in sand making mode one, and to be as close as possible to the pressure target value SP11 in sand making mode one.

[0131] Similarly, when the main motor current value is between the lower limit and the upper limit of the current range of sand making mode 2, sand making mode 3, or sand making mode 4, the automatic control system switches the control equipment to the corresponding sand making mode 2, sand making mode 3, or sand making mode 4, and automatically controls the pressure value between the active roller and the driven roller to be between the pressure holding value and the upper limit of the corresponding sand making mode 2, sand making mode 3, or sand making mode 4, and to be as close as possible to the pressure target value.

[0132] For example, when the equipment in sand making mode four is suddenly detected to have a change in the main motor current value between the lower limit value ALow2 and the upper limit value AUp2 of the current range in sand making mode two, the automatic control system will immediately control the equipment to switch to sand making mode two and automatically control the pressure value between the active roller and the driven roller to be between the pressure holding value SP22 and the pressure upper limit value SP23 of sand making mode two, and to be as close as possible to the pressure target value SP21 of sand making mode two.

[0133] When the current value of the main motor is not between the lower limit and the upper limit of the current range of the above-mentioned sand making mode 1, sand making mode 2, sand making mode 3, or sand making mode 4, the automatic control system directly switches the control equipment to sand making mode 1.

[0134] The conversion of the above-mentioned sand making mode is carried out dynamically throughout the entire sand making process;

[0135] Furthermore, throughout the entire sand-making mode, the automatic control system will dynamically compare the no-material angle. When the duration for which the detected inclination angle measurement value is continuously lower than the no-material angle low threshold HLow is less than the no-material angle determination delay time Tws, the automatic control system will keep the equipment in the sand-making mode. When the duration for which the detected inclination angle measurement value is continuously higher than the no-material angle low threshold HLow is greater than the no-material angle determination delay time Tws, the automatic control system will automatically control the equipment to return to the no-material angle comparison step and reduce the contact pressure between the active roller and the driven roller to the contact pressure value Sd.

[0136] V. Equipment shutdown:

[0137] When the equipment needs to be stopped, press the equipment stop button or click the equipment stop option in the central controller. The automatic control system first controls the hydraulic cylinder to retract through the hydraulic station, causing the driven roller to retract and the hydraulic station to stop working. Then, after the main motor stop delay TStop time, the main motor stops running. At the same time, the thin oil station and lubrication device also stop working, and the equipment stops completely.

[0138] Table 1 below shows the control parameter values ​​for the two single-drive double-roller sand making machines in this embodiment when using granite as the raw material for sand making.

[0139] Table 1: Values ​​of various control parameters

[0140]

[0141]

[0142] The intelligent automated control method for a large high-pressure double-roll sand making machine of the present invention is suitable for the automated control of large high-pressure double-roll sand making machines for producing manufactured sand from various sand making raw materials.

Claims

1. A method for intelligent automated control of a large-scale high-pressure double-roll crusher, characterized in that, Its automatic control system operates as follows: (i) Equipment startup: A. Control mode selection; B. Set control parameters: a. Set lubrication control parameters; b. Set the main motor start / stop control parameters; c. Set the material waiting mode control parameters; d. Set the control parameters for the mode switching mechanism; e. Set the sand making mode control parameters; C. Start the main motor; (ii) Enter the material waiting mode; (iii) Entry mode switching mechanism; (iv) Enter sand making mode; (v) Equipment shutdown; The lubrication control parameters include the gear oil temperature control parameters of the thin oil station and the control parameters of the automatic lubrication device; The gear oil temperature control parameters of the thin oil station include: heating temperature start value THStart and heating temperature stop value THStop, as well as cooling temperature start value TCStart and cooling temperature stop value TCStop; The control parameters of the automatic lubrication device include: automatic lubrication time interval TCount and single lubrication duration TLong; The mode switching mechanism control parameters include: high threshold for material angle HUp, material angle determination delay time Tys, low threshold for no-material angle HLow, and no-material angle determination delay time Tws; The mode conversion mechanism includes: ① Comparison from the perspective of content: After the equipment enters the mode switching mechanism, it first performs a comparison of the material-containing angle. When the detected tilt angle measurement value exceeds the material-containing angle high threshold HUp, the automatic control system starts accumulating time. When the accumulated time is greater than the material-containing angle determination delay time Tys, the automatic control system controls the equipment to enter the material-free angle comparison and interrupts the accumulating time. When the accumulated time is less than the material-containing angle determination delay time Tys, the automatic control system controls the equipment to return to the waiting-for-material mode and interrupts the accumulating time. ② Comparison of angles without material: After the equipment enters the no-material angle comparison, when the detected tilt angle measurement value is higher than the no-material angle low threshold HLow, the automatic control system starts to accumulate time. When the accumulated time is greater than the no-material angle determination delay time Tws, the automatic control system controls the equipment to enter the sand making mode and interrupts the accumulated time. When the accumulated time is less than the no-material angle determination delay time Tws, the automatic control system controls the equipment to return to the waiting mode and interrupts the accumulated time.

2. The intelligent automated control method for a large high-pressure double-roll crusher according to claim 1, characterized in that, The main motor start / stop control parameters include the main motor start delay TStart and the main motor stop delay TStop.

3. The intelligent automated control method for a large high-pressure double-roll crusher according to claim 2, characterized in that, The material waiting mode control parameters include: the contact pressure value Sd between the active roller and the driven roller, the contact pressure compensation value Ss, and the contact pressure relief value Sc.

4. The intelligent automated control method for a large high-pressure double-roll crusher according to claim 3, characterized in that, The main starter motor includes: ① Oil temperature detection: When the equipment starts, the thin oil station circulation pump starts immediately. The automatic control system first compares the detected thin oil station gear oil temperature with the set value: when the thin oil station gear oil temperature is lower than the heating temperature start value THStart, the thin oil station gear oil heating device starts heating to raise the temperature, and stops heating when the heating temperature stops at the heating temperature stop value THstop; when the thin oil station gear oil temperature is higher than the cooling temperature start value TCStart, the thin oil station gear oil cooling device starts cooling, and stops cooling when the temperature drops to the cooling temperature stop value TCStop. ② Delayed start of main motor: When the gear oil temperature of the thin oil station is between the heating temperature start value THStart and the cooling temperature start value TCStart, the thin oil station circulation pump pumps the thin oil station gear oil into the reducer. After the set main motor start delay TStart time, the main motor starts. At the same time, the automatic control system accumulates the main motor running time, the hydraulic station and oil cylinder also start working, and the equipment enters the material waiting mode.

5. The intelligent automated control method for a large high-pressure double-roll crusher according to claim 4, characterized in that, The material waiting mode is: When the main motor starts, the hydraulic cylinder begins to work, and contact pressure is formed between the driving roller and the driven roller. When the contact pressure is less than the contact pressure compensation value Ss, the automatic control system controls it to increase the pressure to the contact pressure value Sd; when the contact pressure is greater than the contact pressure relief value Sc, the automatic control system controls it to decrease the pressure to the contact pressure value Sd; thereafter, the equipment enters the mode switching mechanism.

6. The intelligent automated control method for a large high-pressure double-roll crusher according to claim 5, characterized in that, The control parameters for the sand making mode include: control parameters for sand making mode one, control parameters for sand making mode two, control parameters for sand making mode three, and control parameters for sand making mode four. The control parameters for the sand making mode one include: the lower limit of the current range ALow1, the upper limit of the current for sand making mode one AUp1, the target pressure value for sand making mode one SP11, the pressure holding value for sand making mode one SP12, and the upper limit of the pressure for sand making mode one SP13. The control parameters for sand making mode 2 include: lower limit of current range ALow2, upper limit of current for sand making mode 2 AUp2, target pressure value for sand making mode 2 SP21, pressure holding value for sand making mode 2 SP22, and upper limit of pressure for sand making mode 2 SP23. The control parameters for the three sand-making modes include: the lower limit of the current range ALow3, the upper limit of the current for the three sand-making modes AUp3, the target pressure value for the three sand-making modes SP31, the pressure holding value for the three sand-making modes SP32, and the upper limit of the pressure for the three sand-making modes SP33. The control parameters for the fourth sand making mode include: the lower limit of the current range ALow4, the upper limit of the current for the fourth sand making mode AUp4, the target pressure value for the fourth sand making mode SP41, the pressure holding value for the fourth sand making mode SP42, and the upper limit of the pressure for the fourth sand making mode SP43. The current parameters of each sand making mode have the following logical relationship: ALow1≤AUp1≤ALow2≤AUp2≤ALow3≤AUp3≤ALow4≤AUp4.

7. The intelligent automated control method for a large high-pressure double-roll crusher according to claim 6, characterized in that, The sand making mode is: After the equipment enters the sand making mode, the main motor current value is compared. When the main motor current value is between the lower limit of the current range ALow1 and the upper limit of the current range ALow1 in sand making mode one, the automatic control system controls the equipment to switch to sand making mode one, and automatically controls the pressure value between the active roller and the driven roller to be between the pressure holding value SP12 and the pressure upper limit value SP13 in sand making mode one, and to be as close as possible to the pressure target value SP11 in sand making mode one. Similarly, when the main motor current value is between the lower limit and the upper limit of the current range of sand making mode 2, sand making mode 3, or sand making mode 4, the automatic control system switches the control equipment to the corresponding sand making mode 2, sand making mode 3, or sand making mode 4, and automatically controls the pressure value between the active roller and the driven roller to be between the pressure holding value and the upper limit of the corresponding sand making mode 2, sand making mode 3, or sand making mode 4, and to be as close as possible to the pressure target value. When the current value of the main motor is not between the lower limit and the upper limit of the current range of the above-mentioned sand making mode 1, sand making mode 2, sand making mode 3 or sand making mode 4, the automatic control system directly switches the control equipment to sand making mode 1. The conversion of the above-mentioned sand making mode is carried out dynamically throughout the entire sand making process; Furthermore, throughout the entire sand-making mode, the automatic control system will dynamically perform a no-material angle comparison. When the duration for which the detected inclination angle measurement value is continuously lower than the no-material angle low threshold HLow is less than the no-material angle determination delay time Tws, the automatic control system will keep the equipment in the sand-making mode. When the duration for which the detected inclination angle measurement value is continuously lower than the no-material angle low threshold HLow is greater than the no-material angle determination delay time Tws, the automatic control system will automatically control the equipment to exit the no-material angle comparison step and reduce the contact pressure between the active roller and the driven roller to the contact pressure value Sd.

Images