Natural gas delivery automated skills trainer

Abstract

The utility model belongs to the automation technical field relates to a kind of natural gas conveying automation skill training equipment, including display board, power indicator light L is installed on display board, programmable controller PLC, ABB switch power PS, touch screen, smoke detector, temperature sensor, alternating current power terminal D1, direct current power terminal D2, each equipment power switch, signal isolator, on-off output input terminal D3, analog input output terminal D4 and electric head 380V power switch QF3, each equipment power switch is connected with each equipment installed on display board, simultaneously and with field instrument electric actuator, pressure transmitter, temperature transmitter, combustible gas detector connection, the connection between above-mentioned equipment is carried out by open line.

Description

Technical Field

[0001] This utility model belongs to the field of automation technology and relates to a training device for automating natural gas transportation skills. Background Technology

[0002] To complete the long-distance transmission of natural gas, modern natural gas transmission companies construct multiple functional production facilities along the pipeline, such as valve chambers, distribution stations, pigging stations, and metering and pressure regulating stations. These facilities are equipped with highly integrated control systems that interact with various electric and pneumatic actuators, temperature, pressure, and combustible gas sensor transmitters, and other field equipment to achieve remote monitoring, control, and scheduling of the natural gas transmission process.

[0003] Employees in the natural gas transportation industry often possess extensive knowledge of natural gas transportation, but their understanding of automation technology is relatively limited. In recent years, the natural gas transportation industry has developed rapidly, gradually realizing remote automated monitoring and operation of equipment such as valves. Automation systems and field equipment are connected via lines to transmit various signals; a malfunction can lead to production stoppages. Technical staff are busy with their work, and due to the automation systems being tightly encased in explosion-proof, waterproof, and isolation equipment, they cannot easily access their internal workings. Therefore, they lack understanding of the underlying principles of automation systems. To help employees improve their technical skills in automation and enhance their emergency response capabilities in the event of equipment failures, there is an urgent need for a set of automation training materials with clearly defined functional principles, facilitating employees' familiarity with the principles and structure of automation systems. Utility Model Content

[0004] To achieve the above objectives, this utility model provides a training device for natural gas transmission automation skills, which helps frontline employees understand the underlying principles of automation systems.

[0005] The technical solution of this utility model is as follows: A training device for automating natural gas transmission skills includes a display board. The display board is equipped with a power indicator light L, a programmable logic controller (PLC), an ABB switching power supply PS, a touch screen, a smoke detector, a temperature detector, AC power terminals D1 and D2, power switches for each device, signal isolators, digital input / output terminals D3, analog input / output terminals D4, and a 380V power switch QF3 for the electric actuator. The power switches for each device, from left to right, include a main switch QF0, a fuse FU, a surge protector SPD, a PLC power switch QF1, and a PS power switch QF2. The signal isolators, from left to right, include G1, G2, and G3. G4 and each device's power switch is connected to an external 380V power input line L1 / L2 / L3 three-phase power. QF0, QF1, QF2, and QF3 are all in a micro-circuit state. The power indicator L is connected to one of the three-phase power input lines L1 / L2 / L3. The three-phase power input lines L1 / L2 / L3 are connected in parallel to the surge protector SPD before entering the micro-circuit switch QF0, and are connected to the PE ground from the surge protector SPD. Each device's power switch is connected to the devices installed on the display board, and is also connected to the electric actuators, pressure transmitters, temperature transmitters, and combustible gas detectors of the field instruments. All connections between the above devices are made through exposed wiring.

[0006] The neutral wire of the 380V power supply is connected to the fuse FU, and together with L3, which is connected to the main miniature circuit breaker QF0, it is connected to the miniature circuit breaker PLC power switch QF1 and the miniature circuit breaker PS power switch QF2. QF1 is connected to the programmable logic controller (PLC) to complete the 220V power supply, and QF2 is connected to the ABB switching power supply PS to reduce the voltage to 24VDC, which powers the touch screen, smoke detector, temperature detector, temperature transmitter, pressure transmitter, and combustible gas detector.

[0007] Furthermore, the ABB switching power supply PS is connected to the signal isolator via the DC power supply terminal D2, and then connected to the pressure transmitter, temperature transmitter and combustible gas detector via the analog input / output terminal D4 to complete the power supply.

[0008] Furthermore, the power supply to the pressure transmitter passes through signal isolator G1, the power supply to the temperature transmitter passes through signal isolator G2, and the power supply to the combustible gas detector passes through signal isolator G3. Signal isolators G1, G2, and G3 are connected to the programmable logic controller (PLC) via terminals.

[0009] Furthermore, the ABB switching power supply PS is connected to the touch screen, smoke detector, and temperature detector respectively through the DC power supply terminal D2. The touch screen is directly connected to the programmable logic controller (PLC). The smoke detector and temperature detector are connected to the PLC respectively through the digital input / output terminal D3.

[0010] Furthermore, the three-phase power supply of the 380V power input lines L1 / L2 / L3 enters the micro-circuit main switch QF0 and is then connected to the 380V power switch QF3 of the electric actuator, and then to the electric actuator to provide power for its valve switch. The ABB switching power supply PS is connected to the electric actuator through the digital input and output terminals D3 and D4 respectively to realize the power supply of the digital input and output circuits. The electric actuator forms a circuit with the programmable logic controller (PLC).

[0011] The beneficial effects of this utility model are as follows: The natural gas transmission automation skills training equipment provided by this utility model can intuitively and clearly demonstrate the connection methods of relevant equipment in the automation system to front-line workers by setting up open wiring. This can help them better understand the operating principles of the automation system and improve work efficiency by improving their business skills. In addition, this solution is easy to disassemble and can be easily moved to various dispersed employee offices for on-site training. For equipment that is too large to be directly installed on the display board, on-site external connection can be used for equipment fault testing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the device connection of this utility model; Figure 2 This is the overall power distribution diagram of this utility model; Figure 3 This is the power signal circuit diagram for the pressure transmitter; Figure 4 This is the power signal loop diagram for a temperature transmitter. Figure 5 This is the power signal circuit diagram for a combustible gas detector. Figure 6 This is the power signal circuit diagram for a smoke detector. Figure 7 This is the power signal circuit diagram for the temperature sensor. Figure 8 This is a diagram of the power signal circuit for a touchscreen. Figure 9 This is a power signal circuit diagram for an electric actuator.

[0013] Attached label: 1-Display board, 2-Power indicator L, 3-Programmable logic controller (PLC), 4-ABB switching power supply PS, 5-Touch screen, 6-Smoke detector, 7-Temperature detector, 8-AC power terminal D1, 9-DC power terminal D2, 10-Power switches for each device, 11-Signal isolator, 12-Digital input / output terminal D3, 13-Analog input / output terminal D4, 14-380V power switch for the electric motor head QF3. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0015] This utility model provides a training device for automating natural gas transmission skills, such as... Figure 1 As shown, the system includes a display panel 1, on which are mounted a power indicator light L-2, a programmable logic controller (PLC)-3, an ABB switching power supply PS-4, a touch screen 5, a smoke detector 6, a temperature detector 7, AC power terminals D1-8, DC power terminals D2-9, power switches 10 for each device, a signal isolator 11, digital input / output terminals D3-12, analog input / output terminals D4-13, and a 380V power switch QF3-14 for the electric motor. The power switches 10, from left to right, include a main switch QF0, a fuse FU, a surge protector SPD, a PLC power switch QF1, and a PS power switch QF2. The signal isolators 11, from left to right, include G1, G2, G3, and G4. All of the above devices are connected via exposed wiring.

[0016] Example: In this embodiment, the display board 1 is a square board made of insulating material. In order to display clearly, the display board 1 is divided into three frames from top to bottom. The above-mentioned devices are classified and installed in the relevant frames according to their size. The touch screen 5 is installed in a separate frame.

[0017] like Figure 2 As shown, the overall power distribution diagram for all training equipment consists of the following: 1) The power indicator L-2 is connected to the L1 line of the 380V three-phase power supply. The high-voltage power distribution line of the electric actuator is connected to the 380V power supply line L1 / L2 / L3, and then to the micro circuit breaker QF0. After that, it is connected to the 380V power switch QF3 of the electric head, and then to the electric actuator. The 380V is used for the valve switching power.

[0018] 2) PLC power distribution line: The neutral wire of the 380V power supply passes through the fuse FU and is connected to the L3 of the 380V three-phase power supply from the micro circuit breaker QF0, and then connected to the programmable controller PLC3 to complete the 220V power supply.

[0019] 3) PS power distribution line: The neutral line N of the 380V power supply passes through the fuse FU and is connected to the micro-break switch QF2 together with the L3 of the 380V three-phase power supply from the micro-break switch QF0. Then it is connected to the ABB switching power supply PS 4. The ABB switching power supply PS 4 reduces the voltage to 24VDC power supply to provide 24V DC power to the electric actuators, pressure transmitters, temperature transmitters and flammable gas detectors of the field instruments.

[0020] 4) Protective grounding circuit: The three-phase power of the 380V incoming line L1 / L2 / L3 is connected in parallel to the surge protector SPD before entering the miniature circuit breaker QF0, and is connected to the PE ground from the surge protector SPD. When an abnormal voltage breakdown occurs due to a lightning strike, the surge protector SPD will protect the training equipment.

[0021] like Figure 3 As shown, a 24VDC signal is drawn from the ABB switching power supply PS4, and then connected to the pressure transmitter via terminals 1 and 11 of the DC power supply terminal D2 and signal isolator 10 to complete the power supply. The pressure transmitter and PLC use a 4-20mA current signal to transmit the temperature value. It is a 2-wire transmission signal. The transmission principle is that the pressure transmitter couples the pressure signal into the power supply circuit, and the signal isolator G1 separates it, supplying a separate 4-20mA signal to the PLC system to provide the pressure value of the pressure transmitter.

[0022] like Figure 4 As shown, a 24VDC signal is drawn from the ABB switching power supply PS4, and then connected to the temperature transmitter via terminals 2 and 12 of the DC power supply terminal D2 and signal isolator 10 to complete the power supply. The temperature transmitter and PLC use a 4-20mA current signal to transmit the pressure value. It is a 2-wire transmission signal. The transmission principle is that the temperature transmitter couples the temperature signal into the power supply circuit, and the signal isolator G2 separates it, supplying a separate 4-20mA signal to the PLC system to provide the pressure value of the temperature transmitter.

[0023] like Figure 5 As shown, a 24VDC signal is drawn from the ABB switching power supply PS4, and then connected to the combustible gas detector via terminals 3 and 13 of the DC power supply terminal D2 and signal isolator 10 to complete the power supply. The combustible gas detector and the PLC use a 4-20mA current signal to transmit the combustible gas value. It is a 3-wire transmission signal. The transmission principle is that the combustible gas detector shares the negative circuit of the power supply circuit with the combustible gas signal, and transmits the combustible gas signal to the signal isolator G3 in combination with a separate 4-20mA circuit. The signal isolator G3 separates the signal and supplies a separate 4-20mA signal to the PLC system to provide the combustible gas value.

[0024] like Figure 6As shown, a 24VDC signal is drawn from the ABB switching power supply PS4 and connected to the smoke detector via terminals 7 and 17 of the DC power supply terminal D2. The smoke detector and the PLC use digital switching signals to transmit the detector value. The transmission principle is that the smoke detector sends the smoke detection value (0 / 1) signal through the negative circuit of the detector to the PLC to complete the signal transmission. When the circuit is open (signal 1), it means there is smoke, and when the circuit is closed (signal 0), it means there is no smoke.

[0025] like Figure 7 As shown, a 24VDC signal is drawn from the ABB switching power supply PS4 and connected to the temperature sensor after passing through terminals 8 and 18 of the DC power supply terminal D2. The temperature sensor and the PLC use digital switching signals to transmit the sensor value. The transmission principle is that the temperature sensor transmits the high temperature detection value (0 / 1) signal directly to the PLC through the negative terminal circuit of the sensor to complete the signal transmission. When the circuit is open (signal 1), it means that there is a high temperature, and when the circuit is closed (signal 0), it means that there is no high temperature.

[0026] like Figure 8 As shown, a 24VDC signal is drawn from the ABB switching power supply PS4, and then connected to the touch screen 5 HMI through terminals 5 and 15 of the DC power supply terminal D2 to complete the power supply. The touch screen 5 and the PLC transmit 485 signals through a two-wire + / - line. The 485 signal can transmit more information through the programming signal.

[0027] like Figure 9 As shown, the power supply signal for the electric actuator is divided into two parts: The first part is 380V high voltage electricity, from... Figure 1 The 380V power switch QF3 of the electric actuator is directly introduced to the electric actuator for its operating power.

[0028] The second part is the signal low voltage circuit, which is divided into digital input circuit DI and digital output circuit DO.

[0029] In the digital input circuit, power is supplied from ABB switching power supply PS4 to terminal 3 of the digital output input terminal D3, and then to terminal 42 of the electric actuator. Terminal 42 inside the electric actuator forms a path with terminals 43 / 7 / 9 / 11 / 13. Terminals 43 / 7 / 9 / 11 / 13 are connected to PLC I / O ports 2 / 3 / 4 / 5 / 6 respectively. Thus, terminal 42 and PLC I / O ports 2 / 3 / 4 / 5 / 6 form a path. When the path between terminal 42 and terminals 43 / 7 / 9 / 11 / 13 inside the actuator is open or closed, it indicates that the circuit signal is 0 or 1, meaning a digital signal of 0 / 1 has been input to the PLC.

[0030] In the digital output circuit, the PLC's IO:1L outputs 24VDC power through the analog input / output terminal D4 to terminal 5 of the electric actuator. Internally, terminal 5 of the electric actuator forms a path with terminals 32 / 33 / 34 / 35, representing stop, hold, valve opening, and valve closing, respectively. Terminals 32 / 33 / 34 / 35 of the electric actuator further form a path with the PLC's QO:0 / 4 / 5 / 6 via the D4 terminal block. Thus, the PLC's IO:1L and QO:0 / 4 / 5 / 6 form a circuit. Internally, the PLC has a relay in this circuit, which closes upon encountering 24VDC voltage, outputting a signal. When the PLC outputs a signal (digital output signal), it internally applies 24VDC between IO:1L and QO:0 / 4 / 5 / 6, driving the relay to close and outputting a digital signal to the electric actuator, thereby driving the actuator to perform the relevant action.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A training device for automating natural gas transmission skills, characterized in that: The display panel (1) is equipped with a power indicator light L (2), a programmable logic controller (PLC) (3), an ABB switching power supply PS (4), a touch screen (5), a smoke detector (6), a temperature detector (7), an AC power terminal D1 (8), a DC power terminal D2 (9), power switches for each device (10), a signal isolator (11), digital input / output terminals D3 (12), analog input / output terminals D4 (13), and a 380V power switch QF3 (14) for the electric motor. The power switches for each device (10), from left to right, include a main switch QF0, a fuse FU, a surge protector SPD, a PLC power switch QF1, and a PS power switch QF2. The signal isolator (11), from left to right... The right side includes G1, G2, G3 and G4 in sequence. Each device power switch (10) is connected to the external 380V power input line L1 / L2 / L3 three-phase power. QF0, QF1, QF2 and QF3 are all in the micro-break state. The power indicator L (2) is connected to one of the three-phase power input lines of the 380V power input line L1 / L2 / L3. The 380V power input line L1 / L2 / L3 three-phase power is connected in parallel to the surge protector SPD before entering the micro-break switch QF0, and is connected to the PE ground from the surge protector SPD. Each device power switch (10) is connected to each device installed on the display board (1), and is also connected to the electric actuator of the field instrument, pressure transmitter, temperature transmitter and combustible gas detector. The connection between the above devices is made through open wires.

2. The natural gas transmission automation skills training equipment according to claim 1, characterized in that: After the neutral wire of the 380V power supply is connected to the fuse FU, it is connected together with L3, which is connected to the micro-break PLC power switch QF1 and the micro-break PS power switch QF2. QF1 is connected to the programmable controller PLC (3) to complete the 220V power supply. QF2 is connected to the ABB switching power supply PS (4) to reduce the voltage to 24VDC DC power to power the touch screen (5), smoke detector (6), temperature detector (7), temperature transmitter, pressure transmitter and combustible gas detector.

3. The natural gas transmission automation skills training equipment according to claim 2, characterized in that: The ABB switching power supply PS (4) is connected to the signal isolator (11) through the DC power supply terminal D2 (9), and then connected to the pressure transmitter, temperature transmitter and flammable gas detector through the analog input / output terminal D4 (13) to complete the power supply.

4. The natural gas transmission automation skills training equipment according to claim 3, characterized in that: When power is supplied to the pressure transmitter, it passes through G1 of the signal isolator (11); when power is supplied to the temperature transmitter, it passes through G2 of the signal isolator (11); when power is supplied to the flammable gas detector, it passes through G3 of the signal isolator (11). G1, G2 and G3 of the signal isolator (11) are connected to the programmable controller PLC (3) through terminals respectively.

5. The natural gas transmission automation skills training equipment according to claim 2, characterized in that: The ABB switching power supply PS (4) is connected to the touch screen (5), smoke detector (6) and temperature detector (7) respectively through the DC power supply terminal D2 (9). The touch screen (5) is directly connected to the programmable controller PLC (3). The smoke detector (6) and temperature detector (7) are connected to the programmable controller PLC (3) respectively through the switch output input terminal D3 (12).

6. The natural gas transmission automation skills training equipment according to claim 2, characterized in that: The three-phase power of the 380V power input lines L1 / L2 / L3 enters the micro-circuit main switch QF0 and is then connected to the 380V power switch QF3 (14) of the electric head, and then to the electric actuator to provide power for its valve switch. The ABB switching power supply PS (4) is connected to the electric actuator through the digital input and output circuits via the digital output input terminal D3 (12) and the analog input and output terminal D4 (13). The electric actuator forms a circuit with the programmable controller PLC (3).

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