Control method of stockyard stockpiling system

Abstract

The invention relates to a control method of a stockyard stockpiling system. The method comprises the following steps: step 1, controlling a stockpiling machine; step 2, setting a virtual stock bin; step 3, bin selection and assignment; 4, material tracking; step 5, operation control of the stacking system; according to the technical scheme, through control of the PLC system and operation of the upper computer, limestone raw materials are safely, efficiently and uniformly stacked in the material grids, and the operation difficulty and the working intensity of operators are reduced.

Description

Technical Field

[0001] The invention relates to a control method, in particular to a control method for a material yard stockpiling system, and belongs to the technical field of automatic control. Background Art

[0002] Meigang's lime kiln material yard operates in the open air. The limestone piles in the material yard are affected by wind and generate dust on the surface. In addition, secondary dust is generated during the stacking and loading and unloading operations, causing dust pollution to the environment. The material yard was originally designed to have a stockpile of 40,000 tons. Since the limestone materials are stored in piles according to the different needs of suppliers, and the purchased lime conveying system, car wash station and vehicle access in the material yard occupy the yard area, the actual stockpile volume is only 26,000 tons. According to Meigang's annual production of 7.2 million tons of molten iron, the material yard requires 40,000 tons of reserves for 16 days of preparation. The actual situation of the material yard cannot meet the storage capacity. In order to meet the ultra-low emission Class A enterprise standards, the lime kiln material yard is closed and the storage capacity is increased. Therefore, a new solution is urgently needed to solve the above technical problems. Summary of the invention

[0003] The present invention is aimed at the problems existing in the prior art and provides a control method for a stockyard stacking system. The technical solution is to set five material grids in the middle of the stockyard through transformation, with the west side of the material grid open. Each material grid is about 20m wide, 70m long, and 4m high. The limestone raw materials are unloaded into each material grid of the closed stockyard through the underground silo via a vibrating feeder, a belt conveyor system, and a mobile stacker. Combined with on-site hardware equipment, through PLC system control and upper computer operation, the limestone raw materials are safely and efficiently stacked evenly in the material grid, reducing the operating difficulty and work intensity of the operator.

[0004] In order to achieve the above purpose, the technical scheme of the present invention is as follows. The equipment involved in this scheme includes: PLC system, host computer, belt conveyor system, mobile stacker (referred to as material car), material car position detection device and material level detection device. The mobile stacker includes a transverse trolley, a longitudinal trolley, trolley limit 1, trolley limit 2 and a longitudinal belt conveyor A204; the material level detection devices 1 and 2 are installed at both ends of the longitudinal trolley of the material car, and the belt conveyor system includes: vibrating feeder A200, belt conveyor (referred to as belt conveyor) A201, belt conveyor A202, and belt conveyor A203.

[0005] The main contents of the invention of this patent are: according to the structural characteristics of the material car and the stacking method, each material grid of the material yard is divided, and a virtual silo is set. Each silo is a material drop point for unloading. Through the PLC system, different silo parameters are set for different silos. The operator selects the silo through the host computer, and the silo parameters are automatically assigned to the target parameters of the material car. According to the target parameters, the horizontal trolley and the longitudinal trolley of the material car are automatically aligned, and the longitudinal belt conveyor on the material car will automatically select the direction and select the corresponding material level detection device to monitor the material level. At the beginning of stacking, the operator selects the silo through the host computer. When the material truck is in place, the system automatically sends the message "the material truck is in place", and then starts the stacking system. The belt conveyors A201, A202, A203 and A204 in the system will start in sequence. After all the belt conveyors are started, the system gives the message "the belt conveyor is running normally". The vibrating feeder A200 starts automatically and transports the limestone raw materials in the underground silo to the belt conveyor. At the same time, it gives the signal "the belt has material" and the signal "forbidden to change the silo". The system prohibits the transverse movement of the large and longitudinal trolleys, and prohibits the reversal of the longitudinal belt conveyor A204. According to the total length of the belt conveyor and the transmission speed of the belt conveyor, the time T from the drop point of the vibrating feeder to the discharge point of the longitudinal belt conveyor A204 is calculated. The system automatically tracks the material level signal of the corresponding material level detection device according to the selected bin. When the material level reaches the set material level, the system automatically stops the vibrating feeder A200 and stops unloading. Then the system automatically starts the countdown. In order to ensure that there is no limestone raw material on all belt conveyors, the countdown starts at T+ΔT seconds. When the countdown ends, the system gives the "belt material is empty" signal and the "allow bin change" signal, and the belt conveyor continues to operate. The operator reselects the virtual bin, waits for the material truck to "arrive", and operates the upper computer to click the "reset" button to continue stacking. The entire stacking process simplifies the loading operation, reduces the intervention of manual operation, improves production efficiency, realizes safe and efficient precise stacking, and the material grid is fully utilized.

[0006] A method for controlling a stockpile system in a stockyard, the method comprising the following steps:

[0007] Step 1: Control of the stacker;

[0008] Step 2: Setting up the virtual silo;

[0009] Step 3: Select warehouse and assign value;

[0010] Step 4: Material tracking;

[0011] Step 5: Operation and control of the stockpiling system.

[0012] Among them, Step 1: Control of the stacker, specifically as follows: The stacker includes a transverse trolley, a longitudinal trolley, a longitudinal belt conveyor A204, a trolley position detection device, a longitudinal trolley limit device 1, a longitudinal trolley limit device 2, a material level detection device 1, and a material level detection device 2. The transverse trolley is installed on the track, and there are four groups of wheels on the left and right, all of which are driving wheels and can drive lateral movement. Two groups of driven wheels are installed on the middle track to play a role in middle support. The position of the transverse trolley is detected by the trolley position detection device, and the position signal is sent to the PLC system and the distance of the transverse trolley from the "0" point is displayed on the HMI screen; The longitudinal trolley is installed on the transverse trolley, and there are two groups of guide wheels and a group of driving gears to control the forward and backward movement of the longitudinal trolley. The longitudinal trolley has two positions, namely Position 1 and Position 2. Limit devices 1 and 2 are installed at appropriate positions at both ends on one side of the longitudinal trolley to mark the position of the longitudinal trolley; On the other side of the longitudinal trolley, a material level detection device is installed at each end, namely the material level detection device 1 and the material level detection device 2, which are used to detect the material level near the material dropping points at both ends of the trolley and display the height of the material surface. The longitudinal belt conveyor A204 is installed on the longitudinal trolley and has two directions, forward and reverse. Discharging in the direction of Position 2 is the forward direction, and discharging in the direction of Position 1 is the reverse direction. 1.1 Control of the transverse trolley:

[0013] Set S as the current position of the transverse trolley and S0 as the target position of the transverse trolley. The transverse trolley controls the movement of the trolley according to the relationship between S and S0:

[0014] When S0 > S, the transverse trolley travels forward;

[0015] When S0 = S, the transverse trolley stops traveling;

[0016] When S0 < S, the transverse trolley travels in reverse;

[0017] 1.2 Control of the longitudinal trolley:

[0018] When the longitudinal trolley touches the trolley limit 1, the PLC system receives the limit signal as "1" and sets X to 1;

[0019] When the longitudinal trolley touches the trolley limit 2, the PLC system receives the limit signal as "1" and sets X to 2;

[0020] Set X as the current position of the longitudinal trolley and X0 as the target position of the longitudinal trolley.

[0021] When X0 > X, the longitudinal trolley travels forward;

[0022] When X0 = X, the longitudinal trolley stops traveling;

[0023] When X0 < X, the longitudinal trolley travels in reverse;

[0024] 1.3 Selection of longitudinal belt conveyor direction and material level detection device:

[0025] Y is used to represent the operating status of the longitudinal belt conveyor.

[0026] When Y=2, the longitudinal belt conveyor runs in the forward direction; at the same time, the material level detection device 2 is selected to monitor the material level;

[0027] When Y=0, the longitudinal belt conveyor stops running;

[0028] When Y=1, the longitudinal belt conveyor runs in the reverse direction; at the same time, the material level detection device 1 is selected to monitor the material level.

[0029] Among them, step 2: setting of virtual silos is as follows: five material grids are set in the middle of the lime kiln material yard, numbered A, B, C, E and F respectively, each material grid is about 20m wide, about 70m long, and 4m high. Materials from different suppliers are stacked in each material grid. Each material grid is divided into 16 material drop areas, which are set to 16 virtual silos and 5 material grids, with a total of 80 virtual silos. Each virtual silo has corresponding silo parameters (S, X, Y); S represents the position of the transverse trolley, X represents the position of the longitudinal trolley, and Y represents the steering and material level detection device selection of the belt conveyor A204.

[0030] Among them, step 3: selecting the bin and assigning values ​​is as follows: click on the number of the corresponding bin through the upper computer operation screen, and the screen sends a trigger signal (0→1) to the PLC system, and the selected bin is set to "1" and other bins are reset at the same time, making other bins "0". The selected bin is displayed as "selected" on the screen, and the PLC system will automatically assign the bin parameters of the bin to the target parameters of the stacker, and then the PLC system compares the current parameter value with the target parameter. The PLC system automatically controls the material cart. When the target parameter is consistent with the current parameter, the system gives a signal that the material cart is "in place"; otherwise, the system gives a signal that the material cart is "not in place".

[0031] Among them, step 4: material tracking; the belt system starts to start running, when the PLC system receives the running signals of belt conveyors A201, A202, A203 and A204 at the same time, the system gives a "belt running normally" signal, otherwise a "belt running abnormal" signal; when the system receives the "belt running normally" signal of the belt system and the "already in place" signal of the material car, the vibrating feeder A200 automatically starts to run, and transports the limestone in the underground silo to the belt conveyor, and the system simultaneously gives a "belt has material" signal" and a "storage change is strictly prohibited" signal of the stacker; when the belt runs for a period of time, when the material level H monitored by the selected material level detection device reaches the set safe material level H0, the system automatically stops the vibrating feeder; according to the total length of the belt and the speed of the belt, the time T for the limestone to reach the drop point is calculated; when the vibrating feeder stops running, the PLC system starts a countdown, the time is T+ΔT (to ensure that all the limestone on the belt has been moved and there is no limestone on the belt), and the countdown ends, the system gives a "storage change is allowed" signal.

[0032] Among them, step 5: the operation control of the stacking system is as follows:

[0033] 5.1 Equipment control mode selection:

[0034] The main equipment includes: vibrating feeder A200, belt conveyor A201, belt conveyor A202, belt conveyor A203, material cart;

[0035] Control mode explanation:

[0036] Ready:

[0037] When the Ready box is "Faulty", it means that the device is faulty and cannot be operated;

[0038] When the Ready box is "Ready", it means the equipment is in good condition and can be started at any time;

[0039] Machine side / central:

[0040] When the box is "beside the machine", it means that the equipment can be started and stopped by the machine on site;

[0041] When the box is "centralized", it means that the equipment can be started and stopped through the HMI screen and PLC system operation;

[0042] Manual / Automatic:

[0043] The operator selects "manual" or "automatic" through the host computer HMI screen

[0044] When the box displays "Manual", it means that the device can be started and stopped individually through the HMI screen;

[0045] When the box displays "Automatic", it means that the start and stop buttons of the HMI stacking system screen group can be used to control the start or stop of the relevant equipment of the total stacking system in sequence;

[0046] 5.2 Operation steps of the stacking system:

[0047] ①Confirm that the relevant equipment is in "centralized" and "ready" mode, and then switch the equipment to "automatic" control mode;

[0048] ② Material cart selection: The operator selects the virtual material bin where the material needs to be unloaded, and the PLC system automatically controls the horizontal movement of the material cart and the vertical movement of the small cart to the target position, and selects the direction to start the belt conveyor A204. When the current parameters of the material cart are consistent with the target parameters, the system gives a "material cart is in place" signal and activates the corresponding material level detection device to monitor the material level change;

[0049] ③ The operator clicks "Group Start", and the belt conveyors A203, A202, and A201 start running in sequence. When the system receives the running signals of all the belt conveyors, the system gives a "belt conveyor running normally" signal;

[0050] ⑤ When the "material car has arrived" signal and the "belt conveyor is running normally" signal are met at the same time, the system automatically starts the vibrating feeder A200. After receiving the running signal, the system gives the "belt has material" and "no bin change" signals, locks the material car, prohibits the horizontal movement of the trolley and the longitudinal position change of the trolley, and the belt conveyor reversing;

[0051] ⑥ When the material level monitoring device detects that the material level has reached the set safety level, the system sends a "bin is full" signal, stops the vibrating feeder A200 at the same time, and the running signal changes from "1" to "0", and the bin change countdown begins. The time is T+ΔT. When the countdown ends, the system sends a "bin change allowed" signal. At this point, one stacking has been completed;

[0052] ⑦ The operator reselects the virtual silo through the HMI screen, and after receiving the "material car has arrived" signal, clicks the "Reset" button to restart the vibrating feeder A200 and start the next stacking;

[0053] ⑧ After completing all work tasks, click "Group Stop" on the HMI screen, and the vibrating feeder A200, belt conveyors A201, A202, A203, and A204 will stop running in sequence according to a certain period of time.

[0054] Compared with the prior art, the present invention has the following advantages. After adopting this method, the main control personnel only needs to select the virtual silo where materials need to be stacked. The system will automatically move the transverse trolley and the longitudinal trolley of the stacker to the specified position, and automatically select the forward (or reverse) direction of the longitudinal belt conveyor. When the set material level is reached during stacking, the stacking will be automatically stopped, thereby improving the accuracy and safety of stacking and achieving efficient stacking. The staff does not need to go to the site to track and direct, which greatly reduces the labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 It is a top view schematic diagram of the stockpiling system;

[0056] Figure 2 This is a schematic diagram of the stockpiling system;

[0057] Figure 3 It is a top view schematic diagram of a mobile stacker;

[0058] Figure 4 It is a cross-sectional schematic diagram of a mobile stacker;

[0059] Figure 5 It is a side view schematic diagram of a mobile stacker;

[0060] Figure 6 This is the layout diagram of the virtual silo for stacking materials.

[0061] In the figure: 1. material yard shed, 2. material stacking grid, 3. material level detection device, 4. position detection device, 5. mobile stacker, 6. underground silo, 7. vibrating feeder A200, 8. belt conveyor A201, 9. belt conveyor A203, 10. belt conveyor A202, 11. transverse trolley, 12. longitudinal trolley, 13. material level detection device 2, 14. longitudinal belt conveyor A204, 15. longitudinal trolley limit device 2, 16. longitudinal trolley limit device 1, 18. material level detection device 1, 19. belt conveyor A203 unloading port, 20. track, 21. transverse trolley wheel, 22. longitudinal trolley guide wheel, 23. longitudinal trolley drive device, 24. longitudinal belt conveyor A204 drive roller, 25. limit detection device. DETAILED DESCRIPTION

[0062] In order to deepen the understanding of the present invention, the present embodiment is described in detail below with reference to the accompanying drawings.

[0063] Example 1: See Figure 1, A control method for a stockyard stacking system. The equipment involved in this solution includes: a PLC system, a host computer, a belt conveyor system, a mobile stacker 5, a stacker position detection device, a material level detection device, etc. The mobile stacker includes a transverse trolley (referred to as the trolley), a longitudinal trolley (referred to as the trolley), trolley limit 1, trolley limit 2, and a longitudinal belt conveyor (referred to as belt A204), etc. The belt conveyor system includes: a vibrating feeder A200, a belt conveyor A201, a belt conveyor A202, and a belt conveyor A203, etc.

[0064] Step 1: Control of the stacker. The stacker consists of a transverse trolley, a longitudinal trolley, a longitudinal belt conveyor A204, a trolley position detection device, a longitudinal trolley limit device 1, a longitudinal trolley limit device 2, a material level detection device 1, a material level detection device 2, etc. The transverse trolley is installed on the track, and there are four groups of wheels on the left and right, all of which are driving wheels and can drive lateral movement. Two groups of driven wheels are installed on the middle track to play a role in central support. The position of the transverse trolley is detected by the trolley position detection device, and the position signal is sent to the PLC system and the distance of the transverse trolley from the "0" point is displayed on the HMI screen. The longitudinal trolley is installed on the transverse trolley, and the forward and backward movement of the longitudinal trolley is controlled by two groups of guide wheels and a group of driving gears. The longitudinal trolley has two positions, namely position 1 and position 2. Limit devices 1 and 2 are installed at appropriate positions on both ends of one side of the longitudinal trolley to mark the position of the longitudinal trolley. On both ends of the other side of the longitudinal trolley, a material level detection device is installed respectively, namely the material level detection device 1 and the material level detection device 2, to detect the material level near the material dropping points at both ends of the trolley and display the height of the material surface. The longitudinal belt conveyor A204 is installed on the longitudinal trolley and has two directions, forward and reverse. The material dropping in the direction of position 2 is the forward direction, and the material dropping in the direction of position 1 is the reverse direction.

[0065] 1.1 Control of the transverse trolley:

[0066] Set S as the current position of the transverse trolley and S0 as the target position of the transverse trolley. The transverse trolley controls the movement of the trolley according to the relationship between S and S0:

[0067] When S0 > S, the transverse trolley travels forward;

[0068] When S0 = S, the transverse trolley stops traveling;

[0069] When S0 < S, the transverse trolley travels in reverse;

[0070] 1.2 Control of the longitudinal trolley:

[0071] When the longitudinal trolley touches the trolley limit 1, the PLC system receives the limit signal as "1" and sets X as 1;

[0072] When the longitudinal trolley touches the trolley limit 2, the PLC system receives the limit signal as "1" and sets X to 2;

[0073] Set X as the current position of the longitudinal trolley and X0 as the target position of the longitudinal trolley.

[0074] When X0>X, the longitudinal trolley travels forward;

[0075] When X0 = X, the longitudinal trolley stops traveling;

[0076] When X0<X, the longitudinal trolley travels in reverse;

[0077] 1.3 Selection of the direction and level detection device of the longitudinal belt conveyor:

[0078] Use Y to represent the operating state of the longitudinal belt conveyor.

[0079] When Y = 2, the longitudinal belt conveyor runs forward; at the same time, select the level detection device 2 to monitor the material level;

[0080] When Y = 0, the longitudinal belt conveyor stops running;

[0081] When Y = 1, the longitudinal belt conveyor runs in reverse; at the same time, select the level detection device 1 to monitor the material level;

[0082] Step 2: Setting of the virtual bunker:

[0083] Set up five bins in the middle of the lime kiln stockyard, numbered A, B, C, E, and F respectively. The width of each bin is about 20m, the length is about 70m, the height of the bin is 4m, and each bin stores materials from different suppliers. Each bin is divided into 16 blanking areas, which are set as 16 virtual bunkers. There are 5 bins in total, with 80 virtual bunkers. Each virtual bunker has corresponding bunker parameters (S, X, Y); S represents the position of the transverse trolley, X represents the position of the longitudinal trolley, and Y represents the steering of the belt conveyor A204 and the selection of the level detection device.

[0084] The corresponding parameters of the bins in bin A are as follows

[0085] Position Cart position Numeric Cart position Numeric A204 Status Numeric A1 S1 17 X1 2 Y1 2 A2 S2 12 X2 2 Y2 2 A3 S3 8 X3 2 Y3 2 A4 S4 3 X4 2 Y4 2 A5 S5 17 X5 1 Y5 2 A6 S6 12 X6 1 Y6 2 A7 S7 8 X7 1 Y7 2 A8 S8 3 X8 1 Y8 2 A9 S9 17 X9 2 Y9 1 A10 S10 12 X10 2 Y10 1 A11 S11 8 X11 2 Y11 1 A12 S12 3 X12 2 Y12 1 A13 S13 17 X13 1 Y13 1 A14 S14 12 X14 1 Y14 1 A15 S15 8 X15 1 Y15 1 A16 S16 3 X16 1 Y16 1

[0086] The corresponding parameters of the bins in bin B are as follows

[0087]

[0088]

[0089] The corresponding parameters of the bins in bin C are as follows

[0090] Position Cart position Numeric Cart position Numeric A204 Status Numeric C1 S33 57 X33 2 Y33 2 C2 S34 52 X34 2 Y34 2 C3 S35 48 X35 2 Y35 2 C4 S36 43 X36 2 Y36 2 C5 S37 57 X37 1 Y37 2 C6 S38 52 X38 1 Y38 2 C7 S39 48 X39 1 Y39 2 C8 S40 43 X40 1 Y40 2 C9 S41 57 X41 2 Y41 1 C10 S42 52 X42 2 Y42 1 C11 S43 48 X43 2 Y43 1 C12 S44 43 X44 2 Y44 1 C13 S45 57 X45 1 Y45 1 C14 S46 52 X46 1 Y46 1 C15 S47 48 X47 1 Y47 1 C16 S48 43 X48 1 Y48 1

[0091] The corresponding parameters of E material grid silo are as follows

[0092] Position Cart position Numeric Cart position Numeric A204 Status Numeric E1 S49 77 X49 2 Y49 2 E2 S50 72 X50 2 Y50 2 E3 S51 68 X51 2 Y51 2 E4 S52 63 X52 2 Y52 2 E5 S53 77 X53 1 Y53 2 E6 S54 72 X54 1 Y54 2 E7 S55 68 X55 1 Y55 2 E8 S56 63 X56 1 Y56 2 E9 S57 77 X57 2 Y57 1 E10 S58 72 X58 2 Y58 1 E11 S59 68 X59 2 Y59 1 E12 S60 63 X60 2 Y60 1 E13 S61 77 X61 1 Y61 1 E14 S62 72 X62 1 Y62 1 E15 S63 68 X63 1 Y63 1 E16 S64 63 X64 1 Y64 1

[0093] The corresponding parameters of F material grid silo are as follows

[0094] Position Cart position Numeric Cart position Numeric A204 Status Numeric F1 S65 97 X65 2 Y65 2 F2 S66 92 X66 2 Y66 2 F3 S67 88 X67 2 Y67 2 F4 S68 83 X68 2 Y68 2 F5 S69 97 X69 1 Y69 2 F6 S70 92 X70 1 Y70 2 F7 S71 88 X71 1 Y71 2 F8 S72 83 X72 1 Y72 2 F9 S73 97 X73 2 Y73 1 F10 S74 92 X74 2 Y74 1 F11 S75 88 X75 2 Y75 1 F12 S76 83 X76 2 Y76 1 F13 S77 97 X77 1 Y77 1 F14 S78 92 X78 1 Y78 1 F15 S79 88 X79 1 Y79 1 F16 S80 83 X80 1 Y80 1

[0095] Step 3: Select warehouse and assign values, as follows:

[0096] Click the number of the corresponding material bin on the upper computer operation screen, and the screen will send a trigger signal (0→1) to the PLC system. The selected bin is set to "1" and other bins are reset to "0". The selected bin is displayed as "selected" on the screen. At the same time, the PLC system will automatically assign the bin parameters of the bin to the target parameters of the stacker. Then the PLC system compares the current parameter value with the target parameter. The PLC system automatically controls the material cart. When the target parameter is consistent with the current parameter, the system gives a signal that the material cart is "in place"; otherwise, the system gives a signal that the material cart is "not in place".

[0097] Step 4: Material tracking, as follows:

[0098] The belt system starts to run. When the PLC system receives the operation signals of belt conveyors A201, A202, A203 and A204 at the same time, the system gives a "belt operation normal" signal, otherwise a "belt operation abnormal" signal.

[0099] When the system receives the signal "belt is running normally" from the belt system and the signal "already in place" from the material truck, the vibrating feeder A200 automatically starts to run and transports the limestone in the underground silo to the belt conveyor. The system simultaneously gives the signal "belt has material" and the signal "no silo change" from the stacker.

[0100] After the belt has been running for a period of time, when the material level H monitored by the selected material level detection device reaches the set safety level H0, the system automatically stops the vibration feeder.

[0101] According to the total length of the belt and the speed of the belt, calculate the time T when the limestone reaches the drop point;

[0102] When the vibrating feeder stops running, the PLC system starts counting down, the time is T+ΔT (to ensure that all the limestone on the belt has been moved away and there is no limestone on the belt). When the countdown ends, the system gives a "bin change allowed" signal.

[0103] Step 5: The operation steps of the stacking system are as follows:

[0104] 5.1 Equipment control mode selection:

[0105] The main equipment includes: vibrating feeder A200, belt conveyor A201, belt conveyor A202, belt conveyor A203, material cart;

[0106] Control mode explanation:

[0107] Ready:

[0108] When the Ready box is "Faulty", it means that the device is faulty and cannot be operated;

[0109] When the Ready box is "Ready", it means the equipment is in good condition and can be started at any time;

[0110] Machine side / central:

[0111] When the box is "beside the machine", it means that the equipment can be started and stopped by the machine on site;

[0112] When the box is "centralized", it means that the equipment can be started and stopped through the HMI screen and PLC system operation;

[0113] Manual / Automatic:

[0114] The operator selects "manual" or "automatic" through the host computer HMI screen

[0115] When the box displays "Manual", it means that the device can be started and stopped individually through the HMI screen;

[0116] When the box displays "Automatic", it means that the start and stop buttons of the HMI stacking system screen group can be used to control the start or stop of the relevant equipment of the total stacking system in sequence;

[0117] 5.2 Operation steps of the stacking system:

[0118] ①Confirm that the relevant equipment is in "centralized" and "ready" mode, and then switch the equipment to "automatic" control mode;

[0119] ② Material cart selection: The operator selects the virtual material bin where the material needs to be unloaded, and the PLC system automatically controls the horizontal movement of the material cart and the vertical movement of the small cart to the target position, and selects the direction to start the belt conveyor A204. When the current parameters of the material cart are consistent with the target parameters, the system gives a "material cart is in place" signal and activates the corresponding material level detection device to monitor the material level change;

[0120] ③ The operator clicks "Group Start", and the belt conveyors A203, A202, and A201 start running in sequence. When the system receives the running signals of all the belt conveyors, the system gives a "belt conveyor running normally" signal.

[0121] ⑤ When the "material cart is in place" signal and the "belt conveyor is running normally" signal are met at the same time, the system automatically starts the vibrating feeder A200. The system receives the running signal and gives the "belt has material" and "no bin change" signals, locks the material cart and prohibits the horizontal movement of the trolley and the longitudinal position change of the trolley, as well as the reversal of the belt conveyor.

[0122] ⑥ When the material level monitoring device detects that the material level has reached the set safety level, the system sends a "bin is full" signal, stops the vibrating feeder A200, and the operation signal changes from "1" to "0", and starts the bin change countdown, the time is T+ΔT, and the countdown ends, the system sends a "bin change allowed" signal. So far, one stacking has been completed.

[0123] ⑦ The operator reselects the virtual silo through the HMI screen, and after receiving the "material truck is in place" signal, clicks the "Reset" button to restart the vibrating feeder A200 and start the next stacking.

[0124] ⑧ After completing all work tasks, click "Group Stop" on the HMI screen, and the vibrating feeder A200, belt conveyors A201, A202, A203, and A204 will stop running in sequence according to a certain period of time.

[0125] It should be noted that the above embodiments are not intended to limit the protection scope of the present invention, and equivalent changes or substitutions made on the basis of the above technical solutions all fall within the protection scope of the claims of the present invention.

Claims

1. A control method for a stockpile system in a stockyard, characterized in that: The method includes the following steps: Step 1: Control of the stacker; Step 2: Setting of the virtual bunker; Step 3: Bin selection and assignment; Step 4: Material tracking; Step 5: Operation control of the stacking system.

2. The control method of the stockpile system of the stockyard according to claim 1, characterized in that: Step 1: Control of the stacker, specifically as follows: The stacker includes a transverse trolley, a longitudinal trolley, a longitudinal belt conveyor A204, a trolley position detection device, a longitudinal trolley limit device 1, a longitudinal trolley limit device 2, a material level detection device 1, and a material level detection device 2. The transverse trolley is installed on the track, and all four groups of wheels on the left and right are drive wheels, capable of driving lateral movement. Two groups of driven wheels are installed on the middle track to play a central support role. The position of the transverse trolley is detected by the trolley position detection device, and the position signal is sent to the PLC system and the distance of the transverse trolley from the "0" point is displayed on the HMI screen; The longitudinal trolley is installed on the transverse trolley, and two groups of guide wheels and a set of drive gears control the forward and backward movement of the longitudinal trolley. The longitudinal trolley has two positions, namely position 1 and position 2. Limit device 1 and device 2 are installed at appropriate positions at both ends on one side of the longitudinal trolley to mark the position of the longitudinal trolley; A material level detection device is installed at each end on the other side of the longitudinal trolley, namely the material level detection device 1 and the material level detection device 2, used to detect the material level near the material dropping points at both ends of the trolley and display the height of the material surface. The longitudinal belt conveyor A204 is installed on the longitudinal trolley and has two directions, forward and reverse. Discharging towards position 2 is the forward direction, and discharging towards position 1 is the reverse direction. 1.1 Control of the transverse trolley: Set S as the current position of the transverse trolley and S0 as the target position of the transverse trolley. The transverse trolley controls the movement of the trolley according to the relationship between S and S0: When S0 > S, the transverse trolley travels forward; When S0 = S, the transverse trolley stops traveling; When S0 < S, the transverse trolley travels in reverse; 1.2 Control of the longitudinal trolley: When the longitudinal trolley touches the trolley limit 1, the PLC system receives the limit signal as "1" and sets X to 1; When the longitudinal trolley touches the trolley limit 2, the PLC system receives the limit signal as "1" and sets X to 2; Set X as the current position of the longitudinal trolley and X0 as the target position of the longitudinal trolley. When X0 > X, the longitudinal trolley travels forward; When X0 = X, the longitudinal trolley stops traveling; When X0 < X, the longitudinal trolley travels in reverse; 1.3 Selection of the direction of the longitudinal belt conveyor and the selection of the material level detection device: Use Y to represent the operating state of the longitudinal belt conveyor. When Y = 2, the longitudinal belt conveyor runs forward; At the same time, select the material level detection device 2 to monitor the material level; When Y = 0, the longitudinal belt conveyor stops running; When Y = 1, the longitudinal belt conveyor runs in reverse; At the same time, select the material level detection device 1 to monitor the material level.

3. The control method of the stockpile system of the stockyard according to claim 2, characterized in that: Step 2: The setting of virtual silos is as follows: five material grids are set in the middle of the lime kiln material yard, numbered A, B, C, E and F respectively. The width of each material grid is about 20m, the length is about 70m, and the height of the material grid is 4m. Each material grid is used to stack materials from different suppliers. Each material grid is divided into 16 material drop areas, which are set to 16 virtual silos and 5 material grids, with a total of 80 virtual silos. Each virtual silo has corresponding silo parameters (S, X, Y); S represents the position of the transverse trolley, X represents the position of the longitudinal trolley, and Y represents the steering and material level detection device selection of the belt conveyor A204.

4. The control method of the stockpile system of the stockyard according to claim 3, characterized in that: Step 3: Select the bin and assign values, as follows: click the corresponding bin number through the upper computer operation screen, the screen sends a trigger signal (0→1) to the PLC system, the selected bin is set to "1" and other bins are reset to "0", the selected bin is displayed as "selected" on the screen, and the PLC system will automatically assign the bin parameters of the bin to the target parameters of the stacker, and then the PLC system compares the current parameter value with the target parameter, the PLC system automatically controls the material cart, when the target parameter is consistent with the current parameter, the system gives a signal that the material cart is "in place"; otherwise, the system gives a signal that the material cart is "not in place".

5. The control method of the stockpile system of a stockyard according to claim 3 or 4, characterized in that: Step 4: Material tracking; The belt system starts to run. When the PLC system receives the running signals of belt conveyors A201, A202, A203 and A204 at the same time, the system gives a "belt running normally" signal, otherwise a "belt running abnormal" signal; when the system receives the "belt running normally" signal from the belt system and the "already in place" signal from the material car, the vibrating feeder A200 automatically starts to run and transports the limestone in the underground silo to the belt conveyor. The system simultaneously gives a "belt has material" signal and a "storage change is strictly prohibited" signal from the stacker; after the belt has run for a period of time, when the material level H monitored by the selected material level detection device reaches the set safe material level H0, the system automatically stops the vibrating feeder; according to the total length of the belt and the speed of the belt, the time T for the limestone to reach the drop point is calculated; when the vibrating feeder stops running, the PLC system starts a countdown, the time is T+ΔT (to ensure that all the limestone on the belt has been moved and there is no limestone on the belt), and the countdown ends, the system gives a "storage change is allowed" signal.

6. The control method of the stockpile system of the stockyard according to claim 5, characterized in that: Step 5: The operation and control of the stockpiling system are as follows: 5.1 Equipment control mode selection: The main equipment includes: vibrating feeder A200, belt conveyor A201, belt conveyor A202, belt conveyor A203, material cart; Control mode explanation: Ready: When the Ready box is "Faulty", it means that the device is faulty and cannot be operated; When the Ready box is "Ready", it means the equipment is in good condition and can be started at any time; Machine side / central: When the box is "beside the machine", it means that the equipment can be started and stopped by the machine on site; When the box is "centralized", it means that the equipment can be started and stopped through the HMI screen and PLC system operation; Manual / Automatic: The operator selects "manual" or "automatic" through the host computer HMI screen When the box displays "Manual", it means that the device can be started and stopped individually through the HMI screen; When the box displays "Automatic", it means that the start and stop buttons of the HMI stacking system screen group can be used to control the start or stop of the relevant equipment of the total stacking system in sequence; 5.2 Operation steps of the stacking system: ①Confirm that the relevant equipment is in "centralized" "ready" mode, and then switch the equipment to "automatic" control mode; ② Material cart selection: The operator selects the virtual material bin where the material needs to be unloaded, and the PLC system automatically controls the horizontal movement of the material cart and the longitudinal movement of the small cart to the target position, and selects the direction to start the belt conveyor A204. When the current parameters of the material cart are consistent with the target parameters, the system gives a "material cart is in place" signal and activates the corresponding material level detection device to monitor the material level change; ③ The operator clicks "Group Start", and the belt conveyors A203, A202, and A201 start running in sequence. When the system receives the running signals of all the belt conveyors, the system gives a "belt conveyor running normally" signal; ⑤ When the "material car has arrived" signal and the "belt conveyor is running normally" signal are met at the same time, the system automatically starts the vibrating feeder A200. After receiving the running signal, the system gives the "belt has material" and "no bin change" signals, locks the material car, prohibits the horizontal movement of the trolley and the longitudinal position change of the trolley, and the belt conveyor reversing; ⑥ When the material level monitoring device detects that the material level has reached the set safety level, the system sends a "bin is full" signal, stops the vibrating feeder A200 at the same time, and the running signal changes from "1" to "0", and the bin change countdown begins. The time is T+ΔT. When the countdown ends, the system sends a "bin change allowed" signal. At this point, one stacking has been completed; ⑦ The operator reselects the virtual silo through the HMI screen, and after receiving the "material car has arrived" signal, clicks the "Reset" button to restart the vibrating feeder A200 and start the next stacking; ⑧ After completing all work tasks, click "Group Stop" on the HMI screen, and the vibrating feeder A200, belt conveyors A201, A202, A203, and A204 will stop running in sequence according to a certain period of time.

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