Tailing water conveying control system

Abstract

The utility model belongs to the technical field of mineral separation production, and particularly relates to a tailing water conveying control system. The utility model particularly relates to the conveying and treatment of tailing water. Through the integrated sensor, the control module and the variable frequency driving technology, automatic monitoring, dynamic adjustment and interlocking protection in the conveying process are achieved, efficiency is improved, and energy consumption is reduced. Comprising a main circuit, a control circuit and a sensor module. In the main circuit, a main power switch is connected with a mains supply and connected into first to fifth frequency converters after being shunted by a circuit breaker, and the frequency converters respectively drive a tailing pump motor, a clean water pump motor, an underflow pump motor, a dewatering screen motor and a belt motor. The frequency converter is connected with the control circuit through the relay; the motor operation state is fed back in real time. The sensor module comprises an ultrasonic liquid level meter, an electromagnetic flowmeter, a pressure sensor and a concentration meter. The control circuit comprises a PLC and an industrial personal computer.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of ore dressing production, especially relates to a tailing water conveying control system, and particularly relates to tailing water conveying and processing. BACKGROUND

[0002] In the ore dressing production process, the conveying and recycling of tailing water as an indispensable key link, its stability and efficiency directly affect the economic benefit and environmental protection level of the ore dressing enterprise. The traditional tailing water conveying system has the following problems:

[0003] On the one hand, the degree of automation is low, and the operation of the valve and pump depends on manual adjustment, the response is lagged and the precision is insufficient. On the other hand, real-time monitoring is lacked, conveying strategy cannot be dynamically adjusted according to water quality and quantity, resulting in energy waste or equipment overload. In addition, the system interlocking protection mechanism is imperfect, and fault handling is not timely, which affects the production continuity. An intelligent system is urgently needed to realize accurate control and efficient management of the tailing water conveying process. SUMMARY

[0004] The utility model provides a tailing water conveying control system in view of the defects in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme, a tailing water conveying control system, including main circuit, control circuit, sensor module.

[0006] In the main circuit, the total power switch (QF0) is connected with the mains, and after being shunted through the circuit breaker (QF1-QF5), it is connected with the first to fifth frequency converters, and the frequency converters drive the tailing pump motor (M1), the clean water pump motor (M5), the underflow pump motor (M4), the dewatering screen motor (M2) and the belt motor (M3) respectively.

[0007] The frequency converter is connected with the control circuit through the relay, and the motor running state is fed back in real time.

[0008] The sensor module includes an ultrasonic liquid level meter, an electromagnetic flowmeter, a pressure sensor and a concentration meter.

[0009] The control circuit includes a PLC and an industrial computer, the digital output module (DO) of the PLC controls the start-stop and frequency adjustment of the frequency converter through the relay (KA1-KA5), and the industrial computer is connected with the Ethernet module (PN) of the PLC through an optical fiber. The WinCC man-machine interface (HMI) built-in the industrial computer displays the liquid level, flow, pressure and concentration data in real time.

[0010] Further, the ultrasonic liquid level meter comprises two, wherein the first ultrasonic liquid level meter is installed in the tailings pond, and the second ultrasonic liquid level meter is installed in the clean water pond; the first ultrasonic liquid level meter and the second ultrasonic liquid level meter are connected to an analog input module (AI) of the PLC through 4-20mA analog signals or RS485 interfaces; the electromagnetic flowmeter is arranged in the tailings water conveying pipeline, and the pressure sensor is arranged in the underflow pump outlet pipeline; the electromagnetic flowmeter and the pressure sensor are connected to a communication module (CP1) of the PLC through Modbus communication protocols; and the concentration meter is arranged in the thickener outlet pipeline and connected to the PLC through the analog input module (AI).

[0011] Further, the digital input module (DI) of the PLC receives a motor fault signal, which is used for triggering a standby pump switching or shutdown instruction, thereby constituting an interlocking protection function.

[0012] Further, an over-limit signal of the pressure sensor triggers an emergency stop output of the PLC, so as to cut off a main circuit of the frequency converter; and a low threshold signal of the second ultrasonic liquid level meter is output through the analog output of the PLC, so as to activate a low-frequency operation mode of the frequency converter of the clean water pump motor. The pressure sensor and the second ultrasonic liquid level meter constitute an interlocking protection function.

[0013] Further, a frequency control end of the frequency converter is connected to an analog output module (AO) of the PLC, and the PLC dynamically adjusts the motor speed through the analog output signal.

[0014] Further, the communication module of the PLC is also connected to the dosing quantity meter.

[0015] Further, the frequency converter of the dewatering screen motor is controlled through a pulse output module (PTO) of the PLC, so as to realize precise adjustment of the vibration frequency of the dewatering screen.

[0016] Further, the analog input module (AI) of the PLC is connected to the 4-20mA output ends of the two ultrasonic liquid level meters through shielded cables, and signal isolators are arranged at both ends of the shielded cables.

[0017] Further, the fault output contact (TA-TB) of the frequency converter is connected in series to the digital input module (DI) of the PLC, so as to form a hard-wired interlocking loop; and the running state signal of the frequency converter is connected in parallel to the communication module of the PLC through the RS485 bus, so as to realize double-state monitoring.

[0018] Further, the Modbus communication lines (A+, B-) of the concentration meter and the communication lines of the electromagnetic flowmeter share a twisted shielded cable, and a 120Ω resistor is matched at the terminal, so as to ensure the signal integrity of long-distance transmission.

[0019] Compared with the prior art, the utility model has the beneficial effects.

[0020] The utility model provides a tailing water conveying control system, through integration sensor, control module and frequency conversion drive technology, realize the automation monitoring, dynamic regulation and interlock protection of conveying process, promote efficiency and reduce energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0021] The utility model makes further explanation in combination with the specific embodiment and the drawing. The utility model protection scope is not only limited to the following content's expression.

[0022] Figure 1 It is main circuit schematic diagram.

[0023] Figures 2-12 It is control circuit schematic diagram.

[0024] Figure 13 It is equipment layout drawing. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in combination with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, not all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present disclosure.

[0026] The terms used in the embodiments of the present disclosure are only for the purpose of describing the specific embodiments, and are not intended to limit the present disclosure. The singular forms "a", "an" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0027] Depending on the context, the words "if", "when", etc. as used herein can be interpreted as "upon", "when", or "in response to determining" or "in response to detecting".

[0028] For the convenience of understanding, the embodiments of the present disclosure will be described in detail first.

[0029] As Figures 1-13 Indicated, tailing water conveying control system, including main circuit, control circuit, sensor module.

[0030] In the main circuit, the total power switch (QF0) is connected to the mains, and after being shunted through the circuit breaker (QF1-QF5), it is connected to the first to fifth frequency converters, which respectively drive the tailing pump motor (M1), the clean water pump motor (M5), the underflow pump motor (M4), the dewatering screen motor (M2) and the belt motor (M3). The frequency converter is connected with the control circuit through the relay; real-time feedback motor running state.

[0031] The sensor module includes ultrasonic liquid level meter, electromagnetic flowmeter, pressure sensor, concentration meter. Respectively installed in tailings pond, clean water pool and conveying pipeline, used for collecting liquid level, flow, pressure and water quality data.

[0032] The control circuit includes PLC and industrial computer. The digital output module (DO) of PLC controls the start-stop and frequency adjustment of the frequency converter through the relay (KA1-KA5). The industrial computer is connected with the Ethernet module (PN) of PLC through optical fiber. The WinCC human-machine interface (HMI) built-in the industrial computer displays the liquid level, flow, pressure and concentration data in real time. The PLC accesses the sensor signal and outputs control instruction to the frequency converter, and the industrial computer is used for man-machine interaction and data processing.

[0033] Preferably, the ultrasonic liquid level meter includes two, wherein the first ultrasonic liquid level meter is installed in the tailings pond, and the second ultrasonic liquid level meter is installed in the clean water pool. Both the first ultrasonic liquid level meter and the second ultrasonic liquid level meter are connected to the analog input module (AI) of PLC through 4-20mA analog signal or RS485 interface. The electromagnetic flowmeter is arranged in the tailings water conveying pipeline, and the pressure sensor is installed in the underflow pump outlet pipeline. Both the electromagnetic flowmeter and the pressure sensor are connected with the communication module (CP1) of PLC through Modbus communication protocol. The concentration meter is installed in the thickener outlet pipeline and connected to the PLC through the analog input module (AI).

[0034] Preferably, the digital input module (DI) of the PLC receives the motor fault signal, which is used to trigger the standby pump switching or shutdown instruction, constituting an interlocking protection function.

[0035] Preferably, the over-limit signal of the pressure sensor triggers the emergency stop output of the PLC to cut off the main circuit of the frequency converter. The low threshold signal of the second ultrasonic liquid level meter is output by the analog output of the PLC to activate the low frequency operation mode of the frequency converter of the clean water pump motor. The pressure sensor and the second ultrasonic liquid level meter constitute an interlocking protection function.

[0036] Preferably, the frequency control end of the frequency converter is connected to the analog output module (AO) of the PLC, and the PLC dynamically adjusts the motor speed through the analog output signal.

[0037] Preferably, the communication module of the PLC is also connected to the dosing quantity meter.

[0038] Preferably, the frequency converter of the dewatering screen motor is controlled by the pulse output module (PTO) of the PLC. The precise adjustment of the vibration frequency of the dewatering screen is realized.

[0039] Preferably, the analog input module (AI) of the PLC is connected to the 4-20mA output end of the two ultrasonic liquid level meters through a shielded cable, and signal isolators are arranged at both ends of the shielded cable.

[0040] Preferably, the fault output contact (TA-TB) of the frequency converter is connected in series with the digital input module (DI) of the PLC, forming a hard-wired interlocking loop; the running status signal of the frequency converter is connected in parallel with the communication module of the PLC through the RS485 bus, for double status monitoring.

[0041] Preferably, the Modbus communication lines (A+, B-) of the concentration meter share a twisted shielded cable with the communication lines of the electromagnetic flowmeter, and are terminated with a 120Ω resistor, ensuring the signal integrity of long-distance transmission.

[0042] Example 1, tailings water transportation control system hardware connection introduction:

[0043] In the main circuit, the total power supply is connected to the frequency converters (first to fifth frequency converters) of the tailings pump, clean water pump, etc. through QF0 and QF1-QF5 circuit breakers, and the three-phase power supply of the motor is controlled by the output of the frequency converter.

[0044] The sensor signals (liquid level, flow, pressure) are connected to the AI module of the PLC through 4-20mA analog or Modbus communication, and the switching quantity signals (such as motor fault) are connected to the DI module.

[0045] Control process:

[0046] Data acquisition: PLC real-time acquisition of tailings pond liquid level L1, clean water pond liquid level L2, transportation flow Q and pipeline pressure P.

[0047] Logical operation: if L1> set upper limit, PLC output signal to tailings pump frequency converter, increase frequency to 50Hz; if L1< set lower limit and L2> safety value, start clean water pump to supplement water source.

[0048] Human-computer interaction: industrial computer interface displays real-time curve and alarm information, supports manual / automatic mode switching, and can directly control valve opening and pump speed in manual mode.

[0049] The frequency conversion technology reduces the motor start-stop impact, and the energy consumption is reduced by 20%-30% compared with the traditional system. When overload, water leakage and other faults occur, the system automatically stops and sends an alarm to the control room, and records the fault code for easy troubleshooting.

[0050] Example 2, technical scheme summary: tailings water transportation intelligent control system, comprising:

[0051] Main circuit system: power supply and driving unit.

[0052] The total power switch is connected to the power supply, and after being shunted by the circuit breaker, it is connected to the frequency converter (first to fifth frequency converters) to drive the motor of the tailings pump, the motor of the clean water pump, the motor of the underflow pump, etc. to realize variable frequency speed regulation of the motor.

[0053] The frequency converter is built-in with over-current and overload protection, and real-time feedback of motor running state to the control circuit.

[0054] Sensor network.

[0055] Liquid level monitoring: Ultrasonic liquid level meters are installed at key positions such as tailings ponds, clean water ponds, and thickening machines to collect real-time liquid level data (e.g., tailings pond liquid level meter, clean water pond liquid level meter).

[0056] Flow and pressure monitoring: Electromagnetic flow meters and pressure sensors are installed in the pipeline to monitor water flow (e.g., tailings water conveying pipeline flow meter) and pipeline pressure (e.g., underflow pump outlet pressure sensor).

[0057] Water quality detection.

[0058] Concentration meter (e.g., tailings water concentration meter) is configured to monitor the solid content of tailings water in real time, providing a basis for frequency regulation.

[0059] Control circuit system: Core control module.

[0060] Programmable logic controller (PLC): Siemens S7-1500 series is used to access sensor signals and output control instructions through preset algorithms.

[0061] Industrial computer.

[0062] Wincc human-machine interface (HMI) displays system status in real time, supports parameter setting, historical data query, and fault alarm, communicates with PLC through optical fiber to ensure stable data transmission.

[0063] Intelligent control logic.

[0064] Variable frequency speed regulation: PLC dynamically adjusts the frequency of the frequency converter based on liquid level and flow signals, for example, automatically increases pump speed when tailings pond liquid level is higher than threshold, and reduces energy consumption when it is lower than threshold.

[0065] Interlock protection: Multiple protection mechanisms are set, such as automatically switching to standby pump when clean water pump fails, triggering stop and alarm when pipeline pressure is abnormal.

[0066] Data processing: Industrial computer analyzes sensor data to generate conveying efficiency and energy consumption reports, supports remote monitoring and production scheduling.

[0067] Example 3, based on the drawings, the connection method is:

[0068] Main circuit schematic diagram ( Figure 1 ): It shows the connection relationship of QF0-QF5 circuit breakers, frequency converters (VFD1-VFD5) and motors (M1-M5), as well as the contact control circuit of relays (KA1-KA5).

[0069] Control circuit schematic diagram Figures 2-13

[0070] Figure 2 Control circuit main circuit diagram

[0071] Power input part: L1, L2, L3 are three-phase AC power supply, N is the neutral line, PE is the protective grounding line, which is connected through the XT0 terminal row. The main circuit breaker-QF1 (iC65ND63) is used to cut off the power supply of the entire circuit.

[0072] Branch circuit: different branches are drawn through multiple circuit breakers-QF2 to-QF6. -QF2 and-QF3 are D16A / 3P miniature circuit breakers for larger power external loads; -QF4 is used for UPS (uninterruptible power supply) power supply. The UPS is connected to the circuit through terminals 6 and 7 of-XT0, which has the functions of voltage stabilization, filtering and other processing when the mains is normal, and providing backup power when the mains is abnormal. The power supply output from the UPS is connected to the subsequent circuit through terminals 8 and 9 of-XT0 to supply power for the 24V DC switching power supply. The switching power supply converts the input power into stable DC 24V output to provide stable working power for PLC, switch, IO module and other related loads, ensuring that the equipment can run continuously and stably under different mains conditions. -QF5 is a miniature circuit breaker with small rated current, which supplies power for a five-hole socket; -QF6 (C10 / 2P) is used for cabinet fan lighting.

[0073] Figure 3 , Figure 4 DC 24V power distribution circuit. The 24V power supply is distributed to different branches through miniature circuit breakers. Each circuit breaker corresponds to an XT terminal row, which is used for power supply for different functional modules such as digital input, digital output, analog input, analog output, switch power supply, etc., to realize shunt control and protection of the power supply.

[0074] Figures 5-13 Internal module wiring diagram of Siemens S7-1500 series PLC control cabinet, mapping relationship diagram of PLC input and output points and external device connection.

[0075] Internal module wiring diagram: different device functions are defined, and these IO points are used to collect and process the status signals of field devices and transmit them to PLC for logical processing.

[0076] Correspondence diagram of PLC control cabinet points and external devices:

[0077] Left part: shows the correspondence between IO points and external device states (such as ring water pump inlet and outlet valve closed position, remote state, ring water pump running, fault, etc.), which is convenient for installation, debugging and maintenance personnel to accurately wire and troubleshoot faults. ​

[0078] Right side: shows the connection relationship between internal targets (such as XT2, XT3, etc. terminal row) and external targets (such as 0V, 24V1, and specific device status signals, such as blowdown pump operation, ring water pump valve state, etc.), and clearly shows the electrical connection between the internal circuit and the external device.

[0079] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "preferred embodiment", "specific implementation", or "preferred implementation" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0080] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; therefore, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope defined by the claims of the present application.

Claims

1. A tailings water delivery control system, characterized by, The main circuit, the control circuit and the sensor module are included. In the main circuit, the total power switch is connected to the mains, and is connected to the first to fifth frequency converters after being branched by the circuit breaker. The frequency converters drive the tailings pump motor, the clean water pump motor, the underflow pump motor, the dewatering screen motor and the belt motor respectively. The frequency converters are connected to the control circuit through relays. The sensor module includes ultrasonic liquid level meters, electromagnetic flowmeters, pressure sensors and concentration meters. The control circuit includes a PLC and an industrial computer. The digital output module of the PLC controls the start-stop and frequency adjustment of the frequency converters through relays. The industrial computer is connected to the Ethernet module of the PLC through an optical fiber.

2. A tailings water delivery control system according to claim 1, wherein, The ultrasonic liquid level meters include two, The first ultrasonic liquid level meter is installed in the tailings pond, and the second ultrasonic liquid level meter is installed in the clean water pond. Both the first and second ultrasonic liquid level meters are connected to the analog input module of the PLC through 4-20mA analog signals or RS485 interfaces. The electromagnetic flowmeter is arranged in the tailings water conveying pipeline, and the pressure sensor is installed in the underflow pump outlet pipeline. Both the electromagnetic flowmeter and the pressure sensor are connected to the communication module of the PLC through Modbus communication protocol. The concentration meter is installed in the thickener outlet pipeline and connected to the PLC through the analog input module.

3. A tailings water delivery control system according to claim 2, wherein, The digital input module of the PLC receives motor fault signals to trigger standby pump switching or shutdown instructions.

4. A tailings water delivery control system according to claim 3, wherein, The over-limit signal of the pressure sensor triggers the emergency stop output of the PLC to cut off the main circuit of the frequency converter. The low threshold signal of the second ultrasonic liquid level meter is output by the analog output of the PLC to activate the low-frequency operation mode of the frequency converter of the clean water pump motor.

5. A tailings water delivery control system according to claim 1, wherein, The frequency control end of the frequency converter is connected to the analog output module of the PLC, and the PLC dynamically adjusts the motor speed through analog output signals.

6. A tailings water delivery control system according to claim 1, wherein, The communication module of the PLC is also connected to the chemical addition meter.

7. A tailings water delivery control system according to claim 1, wherein, The frequency converter of the dewatering screen motor is controlled by the pulse output module of the PLC.

8. A tailings water delivery control system according to claim 1, wherein, The analog input module of the PLC is connected to the 4-20mA output end of the two ultrasonic liquid level meters through shielded cables, and signal isolators are arranged at both ends of the shielded cables.

9. A tailings water delivery control system according to claim 1, wherein, The fault output contact of the frequency converter is connected in series to the digital input module of the PLC to form a hard-wired interlocking loop. The running state signal of the frequency converter is connected in parallel to the communication module of the PLC through the RS485 bus for double-state monitoring.

10. A tailings water delivery control system according to claim 1, wherein, The Modbus communication line of the concentration meter and the communication line of the electromagnetic flowmeter share a twisted shielded cable.

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