Power distribution control cabinet framework, skid-mounted refueling PLC control system and application method of skid-mounted refueling PLC control system

Abstract

The invention discloses a power distribution control cabinet framework, a skid-mounted refueling PLC control system and an application method of the skid-mounted refueling PLC control system. Comprising an explosion-proof control cabinet body, a PLC control module arranged in the explosion-proof control cabinet body, an explosion-proof control button arranged on the outer wall of the explosion-proof control cabinet body, a scram button, a liquid crystal display screen, an explosion-proof control switch, an explosion-proof indicating lamp and an explosion-proof touch pad mouse arranged on the outer side portion of the explosion-proof control cabinet body. An explosion-proof audible and visual alarm and an explosion-proof wireless transmitter; the explosion-proof control button, the scram button, the explosion-proof control switch, the liquid crystal display screen, the explosion-proof indicating lamp, the explosion-proof touch pad mouse, the explosion-proof audible and visual alarm and the explosion-proof wireless transmitter are respectively connected with the PLC control module through circuits. The technical problem of low automation degree of a skid-mounted control system architecture in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of skid-mounted refueling automation, and in particular to a power distribution control cabinet architecture, a skid-mounted refueling PLC control system and an application method thereof. Background Art

[0002] At present, general aviation and transport aviation together constitute the "two wings" of the civil aviation transportation system, and aviation fuel is the blood and food of general aviation, and the fuel supply guarantee of general airports is an important support and prerequisite for the stable operation of general aviation. At present, general airports use fuel in many places, over a wide area, in small quantities, with many types and strong seasonality, which makes it difficult to fully improve the fuel supply guarantee system.

[0003] As a new type of mobile refueling equipment, skid-mounted refueling device (hereinafter referred to as skid-mounted) plays an increasingly important role in aviation fuel supply guarantee. It mainly includes a series of equipment such as oil storage tanks, filter separators, oil receiving / sending pumps, flow meters, refueling machines, and power distribution cabinets, and has three major functions: receiving / sending, storage, and refueling. At present, according to different operating requirements and installation environments, skid-mounted equipment can be divided into gasoline (diesel) skid-mounted equipment, gas (CNG / LNG / LPG) skid-mounted equipment, and aviation fuel (aviation kerosene / aviation gasoline) skid-mounted equipment according to its storage medium, and can be divided into oil depot type, gas station type, and simple type according to its own functional configuration.

[0004] For the above-mentioned types of skid-mounted vehicles, the operation control devices in their operation control architecture are all power distribution cabinets, and the actuators are all powered by the power distribution cabinets. The monitoring equipment display terminal is usually installed in the central control room or displayed locally. However, there is generally no PLC automatic and interlocking control between the monitoring equipment itself and the power distribution cabinet. As a result, compared with traditional tank / pipeline refueling trucks at airports, various types of skid-mounted vehicles still have at least the following disadvantages:

[0005] 1) During skid-mounted operations, the labor intensity of operators is high;

[0006] The control method for opening or closing the skid-mounted valves is manual operation. When the operators are performing oil receiving / sending operations, tank emptying operations, and oil return operations, they need to switch to open or close different pipeline valves according to the current operation process. There are many valves to be opened or closed, and the main pipeline valves are mostly flat gate valves, which makes the valve opening and closing operations during the switching operation process cumbersome, time-consuming and labor-intensive. After the operation is completed, according to the skid-mounted safety management requirements, the operators still need to manually close all the opened valves, which further increases the difficulty of operation;

[0007] 2) The power distribution cabinet only has the power supply function, but does not perform PLC automatic and interlocking control with the monitoring equipment and actuators;

[0008] The current power distribution cabinet in the skid-mounted installation is only responsible for providing power to electrical equipment such as the oil pump, return oil pump, explosion-proof lamp / fan, and electric heating. The specific functions of the electrical equipment are still manually controlled by the operators according to the operation needs and environmental conditions. In addition, since the power distribution cabinet is not automatically and interlocked with the monitoring equipment and actuators by PLC, the skid-mounted installation cannot realize automatic control functions such as one-button oil receiving / issuing, quantitative oil receiving / issuing, static grounding alarm and oil receiving / issuing operation interlocking, and low-temperature automatic heating operation. The functionality is relatively simple, which increases the safety risks of skid-mounted operations and cannot realize the automation and simplification of the operation process.

[0009] 3) The integration level of the skid-mounted control system architecture is not high;

[0010] The current skid-mounted control system architecture includes a combustible gas alarm system, a mezzanine leakage alarm system, a liquid level meter system, etc. Each system has different functions, and the display terminals of the combustible gas alarm system, the mezzanine leakage alarm system, and the liquid level meter system need to be installed separately in the central control room. At the same time, each display terminal needs to be connected to the corresponding detector or sensor inside the skid through a signal line. As a result, when laying the skid-mounted signal cables, there are many pre-buried lines, which greatly increases the construction difficulty and engineering workload. Summary of the invention

[0011] To this end, the present invention provides a power distribution control cabinet architecture, a skid-mounted refueling PLC control system and an application method thereof to solve the above-mentioned technical problems existing in the prior art for the skid-mounted control system architecture.

[0012] In order to achieve the above object, the present invention provides the following technical solutions:

[0013] A power distribution control cabinet architecture, comprising:

[0014] Explosion-proof control cabinet, PLC control module, explosion-proof control button, emergency stop button, LCD display, explosion-proof control switch, explosion-proof indicator light, explosion-proof touch panel mouse, explosion-proof sound and light alarm and explosion-proof wireless transmitter;

[0015] The PLC control module is fixedly mounted inside the explosion-proof control cabinet;

[0016] The explosion-proof control button, the emergency stop button, the liquid crystal display screen, the explosion-proof control switch, the explosion-proof indicator light and the explosion-proof wireless transmitter are respectively fixedly mounted on the outer wall of the explosion-proof control cabinet;

[0017] The explosion-proof control button, the emergency stop button and the explosion-proof control switch are respectively connected to the control input end of the PLC control module through a circuit, and the liquid crystal display screen and the explosion-proof indicator light are respectively connected to the control output end of the PLC control module through a circuit;

[0018] The explosion-proof touchpad mouse, the explosion-proof sound and light alarm and the explosion-proof wireless transmitter are respectively extended and fixedly assembled on the outer side of the explosion-proof control cabinet body, and the explosion-proof touchpad mouse is connected to the control input end of the PLC control module inside the explosion-proof control cabinet body through an isolation seal and an explosion-proof winding tube through a circuit, the explosion-proof sound and light alarm is connected to the control output end of the PLC control module inside the explosion-proof control cabinet body through an isolation seal and an explosion-proof winding tube through a circuit, and the explosion-proof wireless transmitter is connected to the control output end of the PLC control module inside the explosion-proof control cabinet body through an isolation seal and an explosion-proof winding tube through a circuit.

[0019] On the basis of the above technical solution, the present invention is further described as follows:

[0020] As a further embodiment of the present invention,

[0021] The explosion-proof control switch includes the explosion-proof control switch for the power supply line and the explosion-proof control switch for the surge protector, as well as the explosion-proof control switches for the oil pump, the fuel dispenser, the explosion-proof fan, the explosion-proof lamp, the heating wire loop, and the spray mechanism;

[0022] The outer wall of the explosion-proof control cabinet is also equipped with a power supply inlet terminal, a monitoring equipment wiring port, an actuator wiring port and a remote signal line wiring port. The PLC control module is connected to the external power supply through the real-time power supply inlet terminal. At the same time, the real-time monitoring equipment wiring port, the real-time actuator wiring port and the real-time remote signal line wiring port are used to connect the PLC control module to the monitoring equipment, the actuator and the remote signal line through the isolation seal, the explosion-proof winding pipe and the galvanized steel pipe.

[0023] A skid-mounted refueling PLC control system comprises the above-mentioned power distribution control cabinet architecture.

[0024] As a further embodiment of the present invention,

[0025] The monitoring equipment includes a level meter for the oil storage tank, a pressure sensor for the oil storage tank, a temperature sensor for the oil storage tank, a pipeline pressure sensor, a sandwich leakage sensor, a level alarm for the quality inspection tank, a flow meter, an ambient temperature sensor, an oil and gas concentration detector, a fire detector and an electrostatic grounding alarm;

[0026] The oil receiving / sending pipeline valves, the refueling pipeline valves, the tank emptying pipeline valves, and the oil return pipeline valves in the actuator are all configured as electronically controlled pipeline valves;

[0027] The explosion-proof indicator light includes a green indicator light for indicating the start-up status of each function and a red indicator light for indicating the shutdown status of each function; the explosion-proof control button includes a start control button for controlling the start-up of each function and a stop control button for controlling the stop of each function.

[0028] As a further embodiment of the present invention,

[0029] The skid-mounted refueling PLC control system also includes a basic oil receiving / sending function component, a quantitative oil receiving / sending function component and a refueling function component;

[0030] The basic oil receiving / discharging function component includes an electrically controlled oil receiving / discharging pipeline valve and an electrically controlled oil receiving / discharging pump connected to each other, wherein the electrically controlled oil receiving / discharging pipeline valve and the electrically controlled oil receiving / discharging pump are respectively connected to the control output end of the PLC control module through a circuit;

[0031] The quantitative oil receiving / discharging function component includes the basic oil receiving / discharging function component and a flow meter. The flow meter is connected to the oil receiving / discharging pipeline valve in the basic oil receiving / discharging function component, and the flow meter is connected to the control input end of the PLC control module through a circuit.

[0032] The refueling function component includes an electrically controlled refueling pipeline valve and a refueling machine connected to each other, and the electrically controlled refueling pipeline valve and the refueling machine are respectively connected to the control output end of the PLC control module through a circuit;

[0033] As a further embodiment of the present invention,

[0034] The skid-mounted refueling PLC control system also includes a tank dumping function component and an oil return function component;

[0035] The tank-turning function component includes the electrically controlled oil receiving / discharging pump and a tank-turning pipeline valve connected thereto, the tank-turning pipeline valve is connected to the control output end of the PLC control module through a circuit, and the tank-turning function is turned on and off by the PLC control module in coordination with the control button, thereby completing the electrically controlled opening and closing of the valve and the pump body based on the opening and closing actions of the control button;

[0036] The oil return function component includes a liquid level alarm, which is connected to the PLC control module through a circuit. When the oil at the bottom of the oil storage tank is discharged into the quality inspection tank, the liquid level alarm is installed on the quality inspection tank, and the liquid level alarm is used to monitor the internal liquid level of the quality inspection tank in real time, and sound and light alarms are issued when the liquid level is high or low; the oil return function component also includes a return oil pipeline valve and a return oil pump. The return oil pipeline valve and the return oil pump are respectively connected to the control output end of the PLC control module through a circuit, so that when the oil discharged into the quality inspection tank flows back to the oil storage tank through the filter separator, the return oil pipeline valve is installed in the pipeline between the quality inspection tank and the filter separator, thereby completing the electronically controlled opening and closing of the valve and the pump body through the PLC control module and the control button.

[0037] As a further embodiment of the present invention,

[0038] The skid-mounted refueling PLC control system also includes a high / low liquid level pump stop interlock control function component, an electrostatic grounding alarm and oil receiving / sending operation interlock function component, and an oil and gas concentration monitoring and ventilation operation interlock function component;

[0039] The high / low liquid level pump stop interlock control function component includes the basic oil receiving / sending function component, a liquid level meter, an explosion-proof sound and light alarm installed in the explosion-proof control cabinet body, and a central control room sound and light alarm. The liquid level meter is installed inside the oil storage tank, and the liquid level meter is connected to the control input end of the PLC control module through a circuit, and the explosion-proof sound and light alarm and the central control room sound and light alarm are respectively connected to the control output end of the PLC control module through a circuit;

[0040] The electrostatic grounding alarm and oil receiving / dispatching operation interlocking function component comprises the basic oil receiving / dispatching function component, an electrostatic clamp, an electrostatic grounding alarm, an explosion-proof sound and light alarm installed in the explosion-proof control cabinet, and a sound and light alarm in the central control room; during each oil receiving / dispatching operation, the electrostatic clamp attached to the electrostatic grounding alarm is connected to an oil tanker, a tank tanker or a general aviation aircraft, and the electrostatic grounding alarm is connected to the control input end of the PLC control module through a circuit;

[0041] The oil and gas concentration monitoring and ventilation operation interlocking function component includes an oil and gas concentration detector and an explosion-proof fan; the oil and gas concentration detector is connected to the control input end of the PLC control module through a circuit, and the explosion-proof fan is connected to the control output end of the PLC control module through a circuit.

[0042] As a further embodiment of the present invention,

[0043] The skid-mounted refueling PLC control system also includes a low-temperature automatic heating function component, a high-temperature automatic spraying function component, an interlayer leakage automatic alarm function component, an overpressure monitoring automatic alarm function component, a fire automatic alarm function component, an emergency stop function component and a skid-mounted operation parameter processing function component;

[0044] The low-temperature automatic heating operation functional component includes an ambient temperature sensor and a heating cable. The ambient temperature sensor is connected to the control input end of the PLC control module via a circuit. The heating cable is installed on the skid-mounted sewage pipeline, and the heating cable is connected to the control output end of the PLC control module via a circuit. The skid-mounted ambient temperature is monitored in real time via the ambient temperature sensor.

[0045] The high-temperature automatic spraying function component includes an oil tank temperature sensor and a spraying mechanism. The oil tank temperature sensor is connected to the control input end of the PLC control module through a circuit. The spraying mechanism is installed on the top of the oil tank, and the spraying mechanism is connected to the control output end of the PLC control module through a circuit. The oil tank temperature sensor monitors the oil temperature in the oil tank in real time.

[0046] The oil tank interlayer leakage automatic alarm function component includes an interlayer leakage sensor, which is installed in the inner and outer tank interlayers of the double-layer oil tank, and the interlayer leakage sensor is connected to the control input end of the PLC control module through a circuit;

[0047] The overpressure monitoring automatic alarm function component includes an oil tank pressure sensor for monitoring the internal pressure of the oil tank and a pipeline pressure sensor for monitoring the skid-mounted pipeline pressure. The two groups of pipeline pressure sensors are respectively connected to the control input end of the PLC control module through a circuit;

[0048] The automatic fire alarm function component includes a fire detector for monitoring fire signals of the skid-mounted refueling device, and the fire detector is connected to the control input end of the PLC control module through a circuit;

[0049] The emergency stop function component includes an emergency stop button arranged between the power supply output terminal side and the PLC control module. The entire skid-mounted power supply can be directly cut off by operating the emergency stop button.

[0050] The skid-mounted operating parameter processing functional component is used for the collection, display, alarm and wireless / wired transmission of skid-mounted operating parameters. It includes a monitoring device, a liquid crystal display, a signal line and an optical fiber component connected to the PLC control module through a circuit, and the skid-mounted operating parameters are collected in real time through the monitoring device.

[0051] A control application method according to the skid-mounted refueling PLC control system specifically comprises the following steps:

[0052] The power supply is used to supply power to the monitoring equipment and actuators in the skid through the power distribution control cabinet structure, collect and display the skid-mounted operating parameters, and transmit them to the central control room through 485 signal lines, optical fibers or explosion-proof wireless transmitter components;

[0053] The operator activates the corresponding control button according to the needs of production operations, the indicator light comes on, and one or more actuators are automatically started and stopped at the same time by electronic control to complete different operation processes;

[0054] During skid-mounted operation, when a certain monitoring parameter exceeds the pre-set warning value of the PLC control module, the PLC control module outputs a control instruction to sound and light alarms on site and in the central control room, and starts at least one actuator according to the automatic and interlocking control program preset by the PLC control module to eliminate the impact and harm caused by the parameter change; specific monitored parameters include but are not limited to the liquid level, temperature, and pressure of the oil in the oil storage tank, leakage of the oil storage tank interlayer, the liquid level of the quality inspection tank, the pressure and flow of the pipeline, the on-site ambient temperature, oil and gas concentration, fire signals, and anti-static grounding signals, so as to achieve automation, simplification, and safety of the architecture.

[0055] As a further solution of the present invention, the following steps are specifically included:

[0056] S1: receiving / sending oil operations;

[0057] S101: One-button oil receiving / discharging function: Press the start control button, the green indicator light comes on, the electric control oil receiving / discharging pipeline valve opens automatically, and then the oil receiving / discharging pump starts, and the oil receiving / discharging operation begins; when the operation process is completed, press the stop control button, the red indicator light comes on, the oil receiving / discharging pump stops, and then the electric control oil receiving / discharging pipeline valve closes automatically;

[0058] S102: Quantitative oil receiving / dispatching function: First, determine the oil receiving / dispatching quantity required for this operation, and input the value into the PLC control module through the explosion-proof touch panel mouse; then press the start control button, the green indicator light turns on, the electric control oil receiving / dispatching pipeline valve automatically opens, the oil receiving / dispatching pump starts, and the oil receiving / dispatching operation begins; the PLC control module monitors the oil receiving / dispatching quantity in real time through the flow meter. When the preset value is reached, the oil receiving / dispatching pump stops, the red indicator light turns on, and the electric control oil receiving / dispatching pipeline valve automatically closes;

[0059] S103: Fueling function of the fuel dispenser: Press the start control button, the green indicator light comes on, the electronically controlled fueling pipeline valve opens automatically, and then the fuel dispenser starts, and the fueling operation begins; when the operation process is completed, press the stop control button, the red indicator light comes on, the fuel dispenser stops, and then the electronically controlled fueling pipeline valve closes automatically;

[0060] S2: Tank emptying operation: Press the start control button, the green indicator light comes on, the tank emptying pipeline valve opens automatically, and then the receiving / sending oil pump starts to start the tank emptying operation; when the operation is completed, press the stop control button, the receiving / sending oil pump stops, the red indicator light comes on, and the tank emptying pipeline valve closes automatically;

[0061] S3: Draining and oil return operation: When draining and oil quality inspection are performed, the oil at the bottom of the oil storage tank is discharged to a closed-circuit sampler or a quality inspection tank;

[0062] The liquid level alarm of the quality inspection tank monitors the liquid level in the quality inspection tank in real time. When the monitoring reaches the high liquid level, the liquid level alarm automatically sends out an audible and visual alarm to prompt the operator to stop the sediment discharge and quality inspection operations.

[0063] When performing the oil return operation, press the start control button, the green indicator light comes on, the oil return pipeline valve from the quality inspection tank to the filter separator opens automatically, the oil return pump starts, and the oil returns to the oil storage tank after being filtered by the filter separator; when the oil in the quality inspection tank is exhausted, press the stop control button, the oil return pump stops running, the red indicator light comes on, and the oil return pipeline valve closes automatically;

[0064] S4: High / low level pump stop interlock control: read the oil level information in the oil storage tank through the level meter; during the oil receiving / dispatching operation and tank emptying operation, when the level meter monitors the oil level in the oil storage tank in real time and reaches the high / low level alarm value, the PLC control module outputs control instructions to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time. At the same time, the PLC control module sends an automatic shutdown instruction to the basic oil receiving / dispatching function component, thereby realizing automatic control and avoiding safety accidents such as oil tank overflow and emptying;

[0065] S5: Interlocking of static grounding alarm and oil receiving / dispatching operation: During skid-mounted oil receiving / dispatching operation, the static clamp of the static grounding alarm is connected to the oil truck, tanker truck or general aviation aircraft respectively to achieve equipotential cross-connection; the static grounding alarm monitors the connection status of the static clamp in real time, and can timely monitor and find that the static clamp falls off during the operation, and the PLC control module outputs control instructions to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time. At the same time, the PLC control module sends an automatic shutdown instruction to the basic oil receiving / dispatching functional components, so as to achieve overall automated control and effectively prevent static fire safety accidents caused by excessive static voltage difference between the skid-mounted and oil trucks, tanker trucks or general aviation aircraft;

[0066] S6: Oil and gas concentration monitoring and ventilation operation linkage: The oil and gas concentration detector is used to monitor the combustible gas concentration in the skid-mounted site environment in real time; when the skid-mounted oil escapes, bubbles, drips, or leaks, the oil and gas concentration detector will detect the oil vapor dispersed in the air, and then the PLC control module will output control instructions to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time. At the same time, the PLC control module controls the start-up of the explosion-proof fan to speed up the air circulation in the skid-mounted site area to avoid safety accidents such as poisoning of personnel and fire and explosion;

[0067] S7: Low-temperature automatic heating operation: The skid-mounted ambient temperature is monitored in real time through the ambient temperature sensor. When the skid-mounted ambient temperature is lower than the warning value, the PLC control module supplies power to the heating wire, so that the heating wire is powered to heat the sewage pipeline for automatic heating and insulation to prevent water accumulation in the pipeline from freezing due to low temperature and blocking the pipeline, affecting the skid-mounted production operation. When the skid-mounted ambient temperature is higher than the warning value, the PLC control module stops supplying power to the heating wire;

[0068] S8: High-temperature automatic spraying operation: The oil tank temperature sensor monitors the temperature of the oil in the oil tank in real time. When the oil temperature is higher than the warning value, the PLC control module supplies power to the spray mechanism, so that the spray mechanism can be heated by electricity to automatically spray the outer wall of the oil tank to reduce the temperature of the oil in the oil tank and the volatilization loss of the oil. When the oil temperature is lower than the warning value, the PLC control module stops supplying power to the spray mechanism.

[0069] S9: Automatic alarm for interlayer leakage: The interlayer leakage sensor of the oil tank monitors in real time whether the tank wall of the oil tank is in good condition. When the interlayer leakage sensor detects the presence of oil vapor in the interlayer, the PLC control module outputs control instructions to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time, prompting you to check the integrity of the tank wall of the oil tank to prevent oil leakage safety accidents;

[0070] S10: Automatic alarm for overpressure monitoring: The internal pressure of the skid-mounted oil storage tank and its pipeline is monitored in real time through the oil tank pressure sensor and the pipeline pressure sensor. When the value of the monitored skid-mounted oil storage tank and / or skid-mounted pipeline is higher than the warning value, the PLC control module outputs a control command to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time, prompting the inspection of the pipeline pressure relief safety valve and the fire-blocking breathing valve equipment to prevent equipment damage and oil leakage accidents caused by overpressure;

[0071] S11: Automatic fire alarm: The fire alarm signal of the skid-mounted refueling device is monitored in real time by the fire detector. When a fire or smoke signal is detected, the PLC control module outputs a control command to the sound and light alarm, which simultaneously sends out sound and light alarms at the skid-mounted site and in the central control room, prompting the user to check whether there is an ignition source in the skid-mounted refueling equipment to prevent fire safety accidents.

[0072] S12: Collection, display, alarm and transmission of skid-mounted operation parameters: The skid-mounted operation parameters are collected in real time through monitoring equipment and presented to on-site operators through LCD screens to facilitate safe management of the skid-mounted system. At the same time, the above parameters are transmitted to the central control room through 485 signal lines, optical fibers or explosion-proof wireless transmitter components, so as to realize fully automatic, all-day and all-weather on-site unmanned monitoring of the skid-mounted operation status;

[0073] S13: Emergency stop function: When a safety accident occurs during the production operation of the skid, the emergency stop button can be operated to quickly cut off the power supply of the entire skid and forcibly stop the current production operation, thereby avoiding the occurrence of safety accidents and significantly improving the safety of the overall control application.

[0074] The present invention has the following beneficial effects:

[0075] 1. This architecture can integrate the skid-mounted power distribution function, PLC automatic and interlocking control function, operation parameter collection, display, alarm and wireless / wired transmission function into the explosion-proof control cabinet body 1, so as to realize the automation, simplification and safety of the skid-mounted operation process, ensure the automatic control function and automatic emergency stop function of the skid-mounted production operation, significantly reduce the labor intensity of the operators, improve the safety of the skid-mounted operation, and effectively improve the integration level of the skid-mounted control system, reduce the number of pre-buried signal lines, construction difficulty and engineering volume, and improve the skid-mounted production safety management level and the operating efficiency of the operators;

[0076] 2. The skid-mounted refueling device can effectively realize the real-time monitoring of the skid-mounted operating parameters, including the liquid level, temperature, pressure, flow rate and other parameters of the skid-mounted equipment, as well as the alarm signals of interlayer leakage, combustible gas concentration, fire alarm, static grounding, etc., and send out sound and light alarms in time according to the monitoring situation, thus realizing the full-automatic, all-day and all-weather monitoring of the skid-mounted operation and improving the safety management level of the skid-mounted equipment;

[0077] 3. The skid-mounted refueling device can effectively realize the automation, simplification and safety of skid-mounted operations; it can realize one-touch oil collection / discharge, quantitative oil collection / discharge, high / low liquid level pump stop interlocking control, static grounding alarm and oil collection / discharge operation interlocking, oil and gas concentration monitoring and ventilation operation interlocking, low-temperature automatic heating operation, high-temperature automatic spraying operation, interlayer leakage automatic alarm, overpressure monitoring automatic alarm, fire automatic alarm and other automatic control functions and emergency stop functions, which significantly reduces the labor intensity of operators and avoids safety accidents such as escape, bubbling, leakage, explosion, etc. caused by weather changes and human factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] In order to more clearly illustrate the implementation mode of the present invention or the technical solution in the prior art, the drawings required for the implementation mode or the description of the prior art will be briefly introduced below. The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0079] Figure 1 A schematic diagram of the front and side views of the power distribution control cabinet architecture provided in an embodiment of the present invention.

[0080] Figure 2 This is one of the schematic diagrams of the control architecture principle of the skid-mounted refueling device provided in an embodiment of the present invention.

[0081] Figure 3 The second schematic diagram of the control architecture principle of the skid-mounted refueling device provided in an embodiment of the present invention.

[0082] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0083] Explosion-proof control cabinet 1; explosion-proof control button 2; emergency stop button 3; LCD display 4;

[0084] Explosion-proof control switch 5: explosion-proof control switch 51 for power supply line; explosion-proof control switch 52 for surge protector; explosion-proof control switch 53 for oil pump, explosion-proof fan, explosion-proof lamp and heating line loop;

[0085] Explosion-proof indicator light 6; explosion-proof touch panel mouse 7; explosion-proof sound and light alarm 8;

[0086] Power supply inlet terminal 9; wiring port 10; explosion-proof wireless transmitter 11. DETAILED DESCRIPTION

[0087] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0088] The terms such as "upper", "lower", "left", "right", and "middle" used in this specification are only for the convenience of description and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships should be regarded as within the scope of the invention without substantially changing the technical content.

[0089] like Figure 1 As shown, an embodiment of the present invention provides a power distribution control cabinet architecture, including an explosion-proof control cabinet body 1, a PLC control module, a power distribution function component, an explosion-proof control button 2, an emergency stop button 3, a liquid crystal display screen 4, an explosion-proof control switch 5, an explosion-proof indicator light 6, an explosion-proof touch panel mouse 7, an explosion-proof sound and light alarm 8 and an explosion-proof wireless transmitter 11, which is used to integrate the skid-mounted power distribution function, PLC automatic and interlocking control function, and operation parameter processing function into the explosion-proof control cabinet body 1, so as to realize the automation, simplification and safety of the skid-mounted operation process, ensure the automatic control function and automatic emergency stop function of the skid-mounted production operation, significantly reduce the labor intensity of the operators, and improve the safety of the skid-mounted operation. At the same time, it can effectively improve the integration level of the skid-mounted control system, reduce the number of pre-buried signal lines, the difficulty of construction and the amount of engineering, and significantly improve the skid-mounted production safety management level and the operating efficiency of the operators. The specific settings are as follows:

[0090] Please refer to Figure 1, the PLC control module is fixedly mounted inside the explosion-proof control cabinet body 1; the explosion-proof control button 2, the emergency stop button 3, the liquid crystal display screen 4, the explosion-proof control switch 5, the explosion-proof indicator light 6 and the explosion-proof wireless transmitter 11 are respectively fixedly mounted on the outer wall of the explosion-proof control cabinet body 1; wherein the explosion-proof control button 2 and the emergency stop button 3 are respectively connected to the control input end of the PLC control module through a circuit, the explosion-proof control switch 5 includes but is not limited to the power supply line explosion-proof control switch 51 and the surge protector explosion-proof control switch 52 and the oil pump, explosion-proof fan, explosion-proof lamp, heating line loop, and explosion-proof control switch 53 of the spray mechanism, and the explosion-proof control switch 5, the liquid crystal display screen 4, the explosion-proof indicator light 6 and the explosion-proof wireless transmitter 11 are respectively connected to the control output end of the PLC control module through a circuit, thereby realizing automated integrated monitoring and control, and improving the automation level of the overall architecture.

[0091] The power distribution function components are installed inside the explosion-proof control cabinet body 1, and the power distribution function components include but are not limited to fuses, circuit breakers, AC contactors, thermal relays, surge protectors, and leakage circuit breakers respectively connected to the PLC control modules through circuits, so as to effectively complete the established power distribution functions and monitoring and control functions based on the explosion-proof control cabinet body 1 through the power distribution function components.

[0092] The explosion-proof touchpad mouse 7, the explosion-proof sound and light alarm 8 and the explosion-proof wireless transmitter 11 are respectively extended and fixedly assembled on the outer side of the explosion-proof control cabinet body 1, and the explosion-proof touchpad mouse 7 is connected to the control input end of the PLC control module inside the explosion-proof control cabinet body 1 through an isolation seal and an explosion-proof winding tube through a circuit, the explosion-proof sound and light alarm 8 is connected to the control output end of the PLC control module inside the explosion-proof control cabinet body 1 through an isolation seal and an explosion-proof winding tube through a circuit, and the explosion-proof wireless transmitter 11 is connected to the control output end of the PLC control module inside the explosion-proof control cabinet body 1 through an isolation seal and an explosion-proof winding tube.

[0093] Please continue to refer to Figure 1 The outer wall of the explosion-proof control cabinet body 1 is also equipped with a power supply inlet terminal, a monitoring device wiring port, an actuator wiring port and a remote signal line wiring port, so as to connect the PLC control module to an external power supply through the power supply inlet terminal. At the same time, the monitoring device wiring port, the actuator wiring port and the remote signal line wiring port can be used to connect the PLC control module to the monitoring device, the actuator and the remote signal line through the isolation seal, the explosion-proof winding pipe and the galvanized steel pipe.

[0094] like Figures 2 to 3 As shown, the embodiment of the present invention also provides a skid-mounted refueling PLC control system including the above-mentioned power distribution control cabinet architecture, and the skid-mounted refueling PLC control system also includes a basic oil receiving / issuing function component, a quantitative oil receiving / issuing function component, a refueling function component, a tank emptying function component, an oil return function component, a high / low liquid level pump stop interlocking control function component, an electrostatic grounding alarm and oil receiving / issuing operation interlocking function component, an oil and gas concentration monitoring and ventilation operation interlocking function component, a low-temperature automatic heating function component, a high-temperature automatic spraying function component, an interlayer leakage automatic alarm function component, an overpressure monitoring automatic alarm function component, a fire detection alarm function component, a skid-mounted operation parameter processing function component and an emergency stop function component, which are used to realize automatic real-time monitoring of skid-mounted operation parameters through the cooperation of the above-mentioned components, thereby improving the skid-mounted safety management level, and at the same time can further realize the automation, simplification and safety of skid-mounted operations, and improve the functional practicality. The specific settings are as follows:

[0095] Please refer to Figures 2 to 3 The monitoring equipment includes a level meter for the oil tank, a temperature sensor for the oil tank, a pressure sensor for the oil tank, a pipeline pressure sensor, a sandwich leakage sensor, a level alarm for the quality inspection tank, a flow meter, an ambient temperature sensor, an oil and gas concentration detector, and an electrostatic grounding alarm; at the same time, the oil receiving / sending pipeline valves, the tank pouring pipeline valves, and the oil return pipeline valves in the actuator are all set to be electronically controlled.

[0096] The explosion-proof indicator light 6 includes a green indicator light for indicating the start-up status of each function and a red indicator light for indicating the shutdown status of each function; the explosion-proof control button 2 includes a start control button for controlling the start-up of each function and a stop control button for controlling the stop of each function.

[0097] The basic oil receiving / discharging function component includes an electrically controlled oil receiving / discharging pipeline valve and an electrically controlled oil receiving / discharging pump that are connected to each other. The electrically controlled oil receiving / discharging pipeline valve and the electrically controlled oil receiving / discharging pump are respectively connected to the control output end of the PLC control module through a circuit, so as to start and close the oil receiving / discharging function through the PLC control module in cooperation with the control button, thereby realizing the electrically controlled automatic opening and closing of the valve and the pump body.

[0098] The quantitative oil receiving / dispensing function component includes the basic oil receiving / dispensing function component and a flow meter. The flow meter is connected to the oil receiving / dispensing pipeline valve in the basic oil receiving / dispensing function component, and the flow meter is connected to the control input end of the PLC control module through a circuit, so as to cooperate with the control button of the PLC control module to start and close the quantitative oil receiving / dispensing function, and cooperate with the explosion-proof touch panel mouse 7 to quantitatively input the oil receiving / dispensing amount, thereby monitoring the valve and the pump body in real time based on the flow meter to automatically open and close the valve and the pump body by electric control.

[0099] The refueling function component includes an electrically controlled refueling pipeline valve and a refueling machine connected to each other, and the electrically controlled refueling pipeline valve and the refueling machine are respectively connected to the control output end of the PLC control module through a circuit;

[0100] The tank pouring function component includes the electrically controlled oil receiving / discharging pump and the tank pouring pipeline valve connected thereto. The tank pouring pipeline valve is connected to the control output end of the PLC control module through a circuit, so as to start and close the tank pouring function through the PLC control module in coordination with the control button, thereby completing the electrically controlled opening and closing of the valve and the pump body based on the opening and closing actions of the control button.

[0101] The oil return function component includes a liquid level alarm, which is connected to the PLC control module through a circuit. When the oil at the bottom of the oil storage tank is discharged to the quality inspection tank, the liquid level alarm is installed on the quality inspection tank, and the liquid level alarm is used to monitor the internal liquid level of the quality inspection tank in real time, and sound and light alarms are issued when the liquid level is high or low; the oil return function component also includes a return oil pipeline valve and a return oil pump. The return oil pipeline valve and the return oil pump are respectively connected to the control output end of the PLC control module through a circuit. When the oil discharged to the quality inspection tank flows back to the oil storage tank through the filter separator, the return oil pipeline valve is installed on the pipeline between the quality inspection tank and the filter separator, thereby completing the electronically controlled opening and closing of the valve and the pump body through the PLC control module and the control button.

[0102] The high / low liquid level pump stop interlocking control function component includes the basic oil receiving / discharging function component, a liquid level meter, an explosion-proof sound and light alarm 8 installed in the explosion-proof control cabinet body 1, and a central control room sound and light alarm. The liquid level meter is installed inside the oil storage tank, and the liquid level meter is connected to the control input end of the PLC control module through a circuit. The explosion-proof sound and light alarm 8 and the central control room sound and light alarm are respectively connected to the control output end of the PLC control module through a circuit. During the oil receiving / discharging operation and tank emptying operation, when the liquid level meter monitors the oil level in the oil storage tank in real time to reach the high / low liquid level alarm value, the PLC control module outputs a control instruction to the sound and light alarm to simultaneously issue a sound and light alarm at the skid-mounted site and the central control room. At the same time, the PLC control module sends an automatic shutdown instruction to the basic oil receiving / discharging function component, thereby realizing automatic control to avoid safety accidents such as oil tank overflow and emptying.

[0103] The electrostatic grounding alarm and oil receiving / dispensing operation interlocking function component includes the basic oil receiving / dispensing function component, an electrostatic grounding alarm, an explosion-proof sound and light alarm 8 installed on the explosion-proof control cabinet body 1, and a sound and light alarm in the central control room, and the electrostatic grounding alarm is connected to the control input end of the PLC control module through a circuit, and the connection status of the electrostatic clamp is acquired through real-time monitoring by the electrostatic grounding alarm; during the skid-mounted oil receiving / dispensing operation, the electrostatic clamp of the electrostatic grounding alarm is respectively connected to the oil tanker, tank refueling truck or general aviation aircraft to achieve equipotential cross-connection; if the electrostatic clamp is detected to fall off during the operation, the PLC control module outputs a control instruction to the sound and light alarm to simultaneously issue a sound and light alarm at the skid-mounted site and the central control room, and at the same time, the PLC control module issues an automatic shutdown instruction to the basic oil receiving / dispensing function component, thereby realizing overall automated control, effectively preventing safety accidents such as static fires caused by excessive electrostatic voltage difference between the skid-mounted and the oil tanker, tank refueling truck or general aviation aircraft, and improving operation safety.

[0104] The oil and gas concentration monitoring and ventilation operation interlocking function component includes an oil and gas concentration detector and an explosion-proof fan. The oil and gas concentration detector is connected to the control input end of the PLC control module through a circuit, and the explosion-proof fan is connected to the control output end of the PLC control module through a circuit, so as to monitor the combustible gas concentration in the skid-mounted site environment in real time through the oil and gas concentration detector; when an oil run, bubble, drip or leak accident occurs in the skid-mounted installation, the oil and gas concentration detector will detect the oil vapor dispersed in the air, and then the PLC control module will output a control instruction to the sound and light alarm to simultaneously issue a sound and light alarm at the skid-mounted site and the central control room, and at the same time, the PLC control module will issue a start instruction to the explosion-proof fan to speed up the air circulation in the skid-mounted site area to avoid safety accidents such as poisoning of personnel, fire and explosion.

[0105] The low-temperature automatic heating operation functional component includes an ambient temperature sensor and a heating wire. The ambient temperature sensor is connected to the control input end of the PLC control module through a circuit. The heating wire is installed in the skid-mounted sewage pipeline, and the heating wire is connected to the control output end of the PLC control module through a circuit. It is used to monitor the skid-mounted ambient temperature in real time through the ambient temperature sensor. When the skid-mounted ambient temperature is lower than the warning value, the PLC control module supplies power to the heating wire, so that the heating wire is powered to heat the sewage pipeline for automatic heating and insulation to prevent water accumulation in the pipeline from freezing due to low temperature and blocking the pipeline, thereby affecting the skid-mounted production operation. When the skid-mounted ambient temperature is higher than the warning value, the PLC control module stops supplying power to the heating wire.

[0106] The high-temperature automatic spraying functional component includes an oil storage tank temperature sensor and a spraying mechanism. The oil storage tank temperature sensor is connected to the control input end of the PLC control module through a circuit. The spraying mechanism is installed on the top of the oil storage tank, and the spraying mechanism is connected to the control output end of the PLC control module through a circuit. The temperature of the oil in the oil storage tank is monitored in real time through the oil storage tank temperature sensor; when the temperature of the oil is higher than the warning value, the PLC control module supplies power to the spraying mechanism, so that the spraying mechanism is electrically heated to automatically spray the outer wall of the oil storage tank to reduce the temperature of the oil in the oil storage tank, thereby reducing the volatilization loss of the oil; when the temperature of the oil is lower than the warning value, the PLC control module stops supplying power to the spraying mechanism;

[0107] The interlayer leakage automatic alarm function component includes an interlayer leakage sensor, which is installed in the inner and outer tank interlayers of the double-layer oil storage tank, and the interlayer leakage sensor is connected to the control input end of the PLC control module through a circuit; the oil storage tank interlayer leakage sensor is used to monitor in real time whether the tank wall of the oil storage tank is in good condition. When the interlayer leakage sensor detects the presence of oil vapor in the interlayer, the PLC control module outputs a control instruction to the sound and light alarm to send out a sound and light alarm at the skid-mounted site and the central control room at the same time, prompting the operating personnel to check the integrity of the tank wall of the oil storage tank in time and take safety treatment measures as soon as possible to prevent safety accidents such as oil leakage;

[0108] The overpressure monitoring automatic alarm function component includes an oil tank pressure sensor for monitoring the internal pressure of the oil tank and a pipeline pressure sensor for monitoring the pressure of the skid-mounted pipeline. The two groups of pipeline pressure sensors are respectively connected to the control input ends of the PLC control module through circuits, so as to monitor the pressure of the skid-mounted oil tank and its pipeline in real time through the two groups of pressure sensors. When the monitored values ​​of the skid-mounted oil tank and / or the skid-mounted pipeline are higher than the warning values, the PLC control module outputs a control instruction to the sound and light alarm to simultaneously send out sound and light alarms at the skid-mounted site and the central control room, prompting operators to check pipeline pressure relief safety valves, fire-blocking breathing valves and other equipment to prevent safety accidents such as equipment damage and oil leakage caused by overpressure.

[0109] The automatic fire alarm function component includes a fire detector for monitoring fire signals of the skid-mounted refueling device, and the detector is connected to the control input end of the PLC control module through a circuit; when a fire or smoke signal is detected, the PLC control module outputs a control instruction to the sound and light alarm to simultaneously send out a sound and light alarm at the skid-mounted site and the central control room, prompting the operating personnel to promptly check whether there is an ignition source in the skid-mounted refueling equipment, and take safety measures as soon as possible to prevent fire safety accidents;

[0110] The skid-mounted operation parameter processing functional component is used for the collection, display, alarm and transmission of skid-mounted operation parameters, and includes a monitoring device, a liquid crystal display screen 4, a signal line and an optical fiber component connected to the PLC control module through a circuit, so as to collect the skid-mounted operation parameters in real time through the monitoring device, and present them to the on-site operators through the liquid crystal display screen 4, so as to facilitate the safe management of the skid-mounted operation. At the same time, the above parameters are transmitted to the central control room by using a 485 signal line or optical fiber or an explosion-proof wireless transmitter 11 component, so as to realize fully automatic, all-day and all-weather monitoring of the skid-mounted operation, especially when there is no one on site at night, in heavy rain or other bad weather.

[0111] The emergency stop function component includes an emergency stop button arranged on the output end side of the power supply, which is used to quickly cut off the power supply of the entire skid by operating the emergency stop button when a sudden safety accident occurs during the production operation of the skid, forcibly stop the current production operation, thereby avoiding the occurrence of safety accidents.

[0112] The control application method of the above-mentioned skid-mounted refueling device specifically includes the following steps:

[0113] The power supply is used to supply power to the monitoring equipment and actuators in the skid through the power distribution control cabinet structure, collect and display the skid-mounted operating parameters, and transmit them to the central control room through 485 signal lines, optical fibers or explosion-proof wireless transmitter components;

[0114] The operator activates the corresponding control button according to the needs of production operations, the indicator light comes on, and one or more actuators are automatically started and stopped at the same time by electronic control to complete different operation processes;

[0115] During skid-mounted operation, when a certain monitoring parameter exceeds the pre-set warning value of the PLC control module, the PLC control module outputs a control instruction to sound and light alarms on site and in the central control room, and starts at least one actuator according to the automatic and interlocking control program preset by the PLC control module to eliminate the impact and harm caused by the parameter change; specific monitored parameters include but are not limited to the liquid level, temperature, and pressure of the oil in the oil storage tank, leakage of the oil storage tank interlayer, the liquid level of the quality inspection tank, the pressure and flow of the pipeline, the on-site ambient temperature, oil and gas concentration, fire signals, and anti-static grounding signals, so as to achieve automation, simplification, and safety of the architecture.

[0116] More specific operation procedures include:

[0117] S1: receiving / sending oil operations;

[0118] S101: One-button oil receiving / discharging function: Press the start control button, the green indicator light comes on, the electric control oil receiving / discharging pipeline valve opens automatically, and then the oil receiving / discharging pump starts, and the oil receiving / discharging operation begins; when the operation process is completed, press the stop control button, the red indicator light comes on, the oil receiving / discharging pump stops, and then the electric control oil receiving / discharging pipeline valve closes automatically;

[0119] S102: Quantitative oil receiving / dispatching function: first determine the oil receiving / dispatching quantity required for this operation, and input the value into the PLC control module through the explosion-proof touch panel mouse 7; then press the start control button, the green indicator light turns on, the electric control oil receiving / dispatching pipeline valve automatically opens, the oil receiving / dispatching pump starts, and the oil receiving / dispatching operation begins; the PLC control module monitors the oil receiving / dispatching quantity in real time through the flow meter, and when the preset value is reached, the oil receiving / dispatching pump stops, the red indicator light turns on, and the electric control oil receiving / dispatching pipeline valve automatically closes;

[0120] S103: Fueling function of the fuel dispenser: Press the start control button, the green indicator light comes on, the electronically controlled fueling pipeline valve opens automatically, and then the fuel dispenser starts, and the fueling operation begins; when the operation process is completed, press the stop control button, the red indicator light comes on, the fuel dispenser stops, and then the electronically controlled fueling pipeline valve closes automatically;

[0121] S2: Tank emptying operation: Press the start control button, the green indicator light comes on, the tank emptying pipeline valve opens automatically, and then the receiving / sending oil pump starts to start the tank emptying operation; when the operation is completed, press the stop control button, the receiving / sending oil pump stops, the red indicator light comes on, and the tank emptying pipeline valve closes automatically;

[0122] S3: Draining and oil return operation: When draining and oil quality inspection are performed, the oil at the bottom of the oil storage tank is discharged to a closed-circuit sampler or a quality inspection tank;

[0123] The liquid level alarm of the quality inspection tank monitors the liquid level in the quality inspection tank in real time. When the monitoring reaches the high liquid level, the liquid level alarm automatically sends out an audible and visual alarm to prompt the operator to stop the sediment discharge and quality inspection operations.

[0124] When performing the oil return operation, press the start control button, the green indicator light comes on, the oil return pipeline valve from the quality inspection tank to the filter separator opens automatically, the oil return pump starts, and the oil returns to the oil storage tank after being filtered by the filter separator; when the oil in the quality inspection tank is exhausted, press the stop control button, the oil return pump stops running, the red indicator light comes on, and the oil return pipeline valve closes automatically;

[0125] S4: High / low level pump stop interlock control: read the oil level information in the oil storage tank through the level meter; during the oil receiving / dispatching operation and tank emptying operation, when the level meter monitors the oil level in the oil storage tank in real time and reaches the high / low level alarm value, the PLC control module outputs control instructions to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time. At the same time, the PLC control module sends an automatic shutdown instruction to the basic oil receiving / dispatching function component, thereby realizing automatic control and avoiding safety accidents such as oil tank overflow and emptying;

[0126] S5: Interlocking of static grounding alarm and oil receiving / dispatching operation: During skid-mounted oil receiving / dispatching operation, the static clamp of the static grounding alarm is connected to the oil truck, tanker truck or general aviation aircraft respectively to achieve equipotential cross-connection; the static grounding alarm monitors the connection status of the static clamp in real time, and can timely monitor and find that the static clamp falls off during the operation, and the PLC control module outputs control instructions to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time. At the same time, the PLC control module sends an automatic shutdown instruction to the basic oil receiving / dispatching functional components, so as to achieve overall automated control and effectively prevent safety accidents such as static fires caused by excessive static voltage difference between the skid-mounted and oil trucks, tanker trucks or general aviation aircraft;

[0127] S6: Oil and gas concentration monitoring and ventilation operation linkage: The oil and gas concentration detector is used to monitor the combustible gas concentration in the skid-mounted site environment in real time; when the skid-mounted oil escapes, bubbles, drips, or leaks, the oil and gas concentration detector will detect the oil vapor dispersed in the air, and then the PLC control module will output control instructions to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time. At the same time, the PLC control module controls the start-up of the explosion-proof fan to speed up the air circulation in the skid-mounted site area to avoid safety accidents such as poisoning of personnel and fire and explosion;

[0128] S7: Low-temperature automatic heating operation: The skid-mounted ambient temperature is monitored in real time through the ambient temperature sensor. When the skid-mounted ambient temperature is lower than the warning value, the PLC control module supplies power to the heating wire, so that the heating wire is powered to heat the sewage pipeline for automatic heating and insulation to prevent water accumulation in the pipeline from freezing due to low temperature and blocking the pipeline, affecting the skid-mounted production operation. When the skid-mounted ambient temperature is higher than the warning value, the PLC control module stops supplying power to the heating wire;

[0129] S8: High-temperature automatic spraying operation: The temperature of the oil in the oil tank is monitored in real time through the oil tank temperature sensor. When the oil temperature is higher than the warning value, the PLC control module supplies power to the spray mechanism, so that the spray mechanism can be heated by electricity to automatically spray the outer wall of the oil tank to reduce the temperature of the oil in the oil tank, thereby reducing the volatilization loss of the oil. When the oil temperature is lower than the warning value, the PLC control module stops supplying power to the spray mechanism;

[0130] S9: Automatic alarm for interlayer leakage: The interlayer leakage sensor of the oil tank monitors in real time whether the tank wall of the oil tank is in good condition. When the interlayer leakage sensor detects the presence of oil vapor in the interlayer, the PLC control module outputs control instructions to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time, prompting you to check the integrity of the tank wall of the oil tank and take safety measures as soon as possible to prevent safety accidents such as oil leakage;

[0131] S10: Automatic alarm for overpressure monitoring: The internal pressure of the skid-mounted oil tank and its pipeline is monitored in real time through the oil tank pressure sensor and the pipeline pressure sensor. When the value of the skid-mounted oil tank and / or the skid-mounted pipeline is higher than the warning value, the PLC control module outputs a control command to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time, prompting the inspection of pipeline pressure relief safety valves, fire-blocking breathing valves and other equipment to prevent safety accidents such as equipment damage and oil leakage caused by overpressure;

[0132] S11: Automatic fire alarm: The fire alarm signal of the skid-mounted refueling device is monitored in real time by the fire detector. When a fire or smoke signal is detected, the PLC control module outputs a control command to the sound and light alarm, which simultaneously sends out sound and light alarms at the skid-mounted site and in the central control room, prompting the user to check whether there is an ignition source in the skid-mounted refueling equipment and take safety measures as soon as possible to prevent fire safety accidents.

[0133] S12: Collection, display, alarm and transmission of skid-mounted operation parameters: The skid-mounted operation parameters are collected in real time through monitoring equipment and presented to on-site operators through LCD screens to facilitate safe management of the skid-mounted equipment. At the same time, the above parameters are transmitted to the central control room using 485 signal lines, optical fibers or explosion-proof wireless transmitter components, so as to achieve fully automatic, all-day and all-weather monitoring of the skid-mounted operation, especially at night, in heavy rain and other unmanned conditions on site;

[0134] S13: Emergency stop function: When a safety accident occurs during the production operation of the skid, the emergency stop button can be operated to quickly cut off the power supply of the entire skid and forcibly stop the current production operation, thereby avoiding the occurrence of safety accidents and significantly improving the safety of the overall control application.

[0135] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A power distribution control cabinet architecture, characterized in that: include: Explosion-proof control cabinet, PLC control module, explosion-proof control button, emergency stop button, LCD display, explosion-proof control switch, explosion-proof indicator light, explosion-proof touch panel mouse, explosion-proof sound and light alarm and explosion-proof wireless transmitter; The PLC control module is fixedly mounted inside the explosion-proof control cabinet; The explosion-proof control button, the emergency stop button, the liquid crystal display screen, the explosion-proof control switch, the explosion-proof indicator light and the explosion-proof wireless transmitter; They are respectively fixedly mounted on the outer wall of the explosion-proof control cabinet; The explosion-proof control button, the emergency stop button and the explosion-proof control switch are respectively connected to the control input end of the PLC control module through a circuit, and the liquid crystal display screen and the explosion-proof indicator light are respectively connected to the control output end of the PLC control module through a circuit; The explosion-proof touchpad mouse, the explosion-proof sound and light alarm and the explosion-proof wireless transmitter are respectively extended and fixedly assembled on the outer side of the explosion-proof control cabinet body, and the explosion-proof touchpad mouse is connected to the control input end of the PLC control module inside the explosion-proof control cabinet body through an isolation seal and an explosion-proof winding tube through a circuit, the explosion-proof sound and light alarm is connected to the control output end of the PLC control module inside the explosion-proof control cabinet body through an isolation seal and an explosion-proof winding tube through a circuit, and the explosion-proof wireless transmitter is connected to the control output end of the PLC control module inside the explosion-proof control cabinet body through an isolation seal and an explosion-proof winding tube through a circuit.

2. The power distribution control cabinet architecture according to claim 1, characterized in that: The explosion-proof control switch includes the explosion-proof control switch for the power supply line and the explosion-proof control switch for the surge protector, as well as the explosion-proof control switches for the oil pump, the fuel dispenser, the explosion-proof fan, the explosion-proof lamp, the heating wire loop, and the spray mechanism; The outer wall of the explosion-proof control cabinet is also equipped with a power supply inlet terminal, a monitoring equipment wiring port, an actuator wiring port and a remote signal line wiring port. The PLC control module is connected to the external power supply through the real-time power supply inlet terminal. At the same time, the real-time monitoring equipment wiring port, the real-time actuator wiring port and the real-time remote signal line wiring port are used to connect the PLC control module to the monitoring equipment, the actuator and the remote signal line through the isolation seal, the explosion-proof winding pipe and the galvanized steel pipe.

3. A skid-mounted refueling PLC control system, characterized in that: It comprises the power distribution control cabinet architecture as described in claim 2.

4. The skid-mounted refueling PLC control system according to claim 3 is characterized in that: The monitoring equipment includes a level meter for the oil storage tank, a pressure sensor for the oil storage tank, a temperature sensor for the oil storage tank, a pipeline pressure sensor, a sandwich leakage sensor, a level alarm for the quality inspection tank, a flow meter, an ambient temperature sensor, an oil and gas concentration detector, a fire detector and an electrostatic grounding alarm; The oil receiving / sending pipeline valves, the refueling pipeline valves, the tank emptying pipeline valves, and the oil return pipeline valves in the actuator are all configured as electronically controlled pipeline valves; The explosion-proof indicator light includes a green indicator light for indicating the start-up status of each function and a red indicator light for indicating the shutdown status of each function; the explosion-proof control button includes a start control button for controlling the start-up of each function and a stop control button for controlling the stop of each function.

5. The skid-mounted refueling PLC control system according to claim 4 is characterized in that: The skid-mounted refueling PLC control system also includes a basic oil receiving / sending function component, a quantitative oil receiving / sending function component and a refueling function component; The basic oil receiving / discharging function component includes an electrically controlled oil receiving / discharging pipeline valve and an electrically controlled oil receiving / discharging pump connected to each other, wherein the electrically controlled oil receiving / discharging pipeline valve and the electrically controlled oil receiving / discharging pump are respectively connected to the control output end of the PLC control module through a circuit; The quantitative oil receiving / discharging function component comprises the basic oil receiving / discharging function component and a flow meter, wherein the flow meter is connected to the oil receiving / discharging pipeline valve in the basic oil receiving / discharging function component, and the flow meter is connected to the control input end of the PLC control module through a circuit; The refueling function component includes an electrically controlled refueling pipeline valve and a refueling machine that are connected to each other. The electrically controlled refueling pipeline valve and the refueling machine are respectively connected to the control output end of the PLC control module through a circuit.

6. The skid-mounted refueling PLC control system according to claim 5 is characterized in that: The skid-mounted refueling PLC control system also includes a tank dumping function component and an oil return function component; The tank-turning function component includes the electrically controlled oil receiving / discharging pump and a tank-turning pipeline valve connected thereto, the tank-turning pipeline valve is connected to the control output end of the PLC control module through a circuit, and the tank-turning function is turned on and off by the PLC control module in coordination with the control button, thereby completing the electrically controlled opening and closing of the valve and the pump body based on the opening and closing actions of the control button; The oil return function component includes a quality inspection tank liquid level alarm, which is connected to the PLC control module through a circuit, and is used to assemble the liquid level alarm on the quality inspection tank when the oil at the bottom of the oil storage tank is discharged into the quality inspection tank, and use the liquid level alarm to monitor the internal liquid level of the quality inspection tank in real time, and give sound and light alarms when the liquid level is high or low; the oil return function component also includes a return oil pipeline valve and a return oil pump, and the return oil pipeline valve and the return oil pump are respectively connected to the control output end of the PLC control module through a circuit, so that when the oil discharged into the quality inspection tank flows back to the oil storage tank through the filter separator, the return oil pipeline valve is assembled on the pipeline between the quality inspection tank and the filter separator, thereby completing the electric control opening and closing of the valve and the pump body through the PLC control module and the control button.

7. The skid-mounted refueling PLC control system according to claim 6 is characterized in that: The skid-mounted refueling PLC control system also includes a high / low liquid level pump stop interlock control function component, an electrostatic grounding alarm and oil receiving / sending operation interlock function component, and an oil and gas concentration monitoring and ventilation operation interlock function component; The high / low liquid level pump stop interlock control function component includes the basic oil receiving / sending function component, a liquid level meter, an explosion-proof sound and light alarm installed in the explosion-proof control cabinet body, and a central control room sound and light alarm. The liquid level meter is installed inside the oil storage tank, and the liquid level meter is connected to the control input end of the PLC control module through a circuit, and the explosion-proof sound and light alarm and the central control room sound and light alarm are respectively connected to the control output end of the PLC control module through a circuit; The electrostatic grounding alarm and oil receiving / discharging operation interlocking functional component includes the basic oil receiving / discharging functional component, an electrostatic clamp, an electrostatic grounding alarm, an explosion-proof sound and light alarm installed in the explosion-proof control cabinet body, and a central control room sound and light alarm; During each oil receiving / sending operation, the electrostatic clamp attached to the electrostatic grounding alarm is connected to the oil tanker, tanker or general aviation aircraft, and the electrostatic grounding alarm is connected to the control input end of the PLC control module through a circuit; The oil and gas concentration monitoring and ventilation operation interlocking function component includes an oil and gas concentration detector and an explosion-proof fan; the oil and gas concentration detector is connected to the control input end of the PLC control module through a circuit, and the explosion-proof fan is connected to the control output end of the PLC control module through a circuit.

8. The skid-mounted refueling PLC control system according to claim 7 is characterized in that: The skid-mounted refueling PLC control system also includes a low-temperature automatic heating function component, a high-temperature automatic spraying function component, an oil tank interlayer leakage automatic alarm function component, an overpressure monitoring automatic alarm function component, a fire automatic alarm function component, an emergency stop function component and a skid-mounted operation parameter processing function component; The low-temperature automatic heating operation functional component includes an ambient temperature sensor and a heating cable. The ambient temperature sensor is connected to the control input end of the PLC control module via a circuit. The heating cable is installed on the skid-mounted sewage pipeline, and the heating cable is connected to the control output end of the PLC control module via a circuit. The skid-mounted ambient temperature is monitored in real time via the ambient temperature sensor. The high-temperature automatic spraying function component includes an oil tank temperature sensor and a spraying mechanism. The oil tank temperature sensor is connected to the control input end of the PLC control module through a circuit. The spraying mechanism is installed on the top of the oil tank, and the spraying mechanism is connected to the control output end of the PLC control module through a circuit. The oil tank temperature sensor monitors the oil temperature in the oil tank in real time. The oil tank interlayer leakage automatic alarm function component includes an interlayer leakage sensor, which is installed in the inner and outer tank interlayers of the double-layer oil tank, and the interlayer leakage sensor is connected to the control input end of the PLC control module through a circuit; The overpressure monitoring automatic alarm function component includes an oil tank pressure sensor for monitoring the internal pressure of the oil tank and a pipeline pressure sensor for monitoring the skid-mounted pipeline pressure. The two groups of pipeline pressure sensors are respectively connected to the control input end of the PLC control module through a circuit; The automatic fire alarm function component includes a fire detector for monitoring fire signals of the skid-mounted refueling device, and the fire detector is connected to the control input end of the PLC control module through a circuit; The emergency stop function component includes an emergency stop button disposed between the power supply output terminal and the PLC control module, and the entire skid-mounted power supply can be directly cut off by operating the emergency stop button; The skid-mounted operating parameter processing functional component is used for the collection, display, alarm and wireless / wired transmission of skid-mounted operating parameters. It includes a monitoring device, a liquid crystal display, a signal line and an optical fiber component connected to the PLC control module through a circuit, and the skid-mounted operating parameters are collected in real time through the monitoring device.

9. A control application method of the skid-mounted refueling PLC control system according to claim 8, characterized in that: The specific steps include: The power supply is used to supply power to the monitoring equipment and actuators in the skid through the power distribution control cabinet structure, collect and display the skid-mounted operating parameters, and transmit them to the central control room through 485 signal lines, optical fibers or explosion-proof wireless transmitter components; According to the needs of production operations, the corresponding control button is activated, the indicator light comes on, and one or more actuators are automatically started and stopped at the same time by electronic control to complete different operation processes; During skid-mounted operation, when a certain monitoring parameter exceeds the pre-set warning value of the PLC control module, the PLC control module outputs a control instruction to sound and light alarms on site and in the central control room, and starts at least one actuator according to the automatic and interlocking control program preset by the PLC control module to eliminate the impact and harm caused by the parameter change; the specific monitored parameters include the liquid level, temperature, and pressure of the oil in the oil storage tank, the leakage of the oil storage tank interlayer, the liquid level of the quality inspection tank, the pressure and flow of the pipeline, the on-site ambient temperature, oil and gas concentration, fire signals, and anti-static grounding signals, so as to realize the automation, simplification and safety of the architecture.

10. The control application method of the skid-mounted refueling device according to claim 9, characterized in that: The specific steps include: S1: receiving / sending oil operations; S101: One-button oil receiving / discharging function: Press the start control button, the green indicator light comes on, the electric control oil receiving / discharging pipeline valve opens automatically, and then the oil receiving / discharging pump starts, and the oil receiving / discharging operation begins; when the operation process is completed, press the stop control button, the red indicator light comes on, the oil receiving / discharging pump stops, and then the electric control oil receiving / discharging pipeline valve closes automatically; S102: Quantitative oil receiving / dispatching function: First, determine the oil receiving / dispatching quantity required for this operation, and input the value into the PLC control module through the explosion-proof touch panel mouse; then press the start control button, the green indicator light turns on, the electric control oil receiving / dispatching pipeline valve automatically opens, the oil receiving / dispatching pump starts, and the oil receiving / dispatching operation begins; the PLC control module monitors the oil receiving / dispatching quantity in real time through the flow meter. When the preset value is reached, the oil receiving / dispatching pump stops, the red indicator light turns on, and the electric control oil receiving / dispatching pipeline valve automatically closes; S103: Fueling function of the fuel dispenser: Press the start control button, the green indicator light comes on, the electronically controlled fueling pipeline valve opens automatically, and then the fuel dispenser starts, and the fueling operation begins; when the operation process is completed, press the stop control button, the red indicator light comes on, the fuel dispenser stops, and then the electronically controlled fueling pipeline valve closes automatically; S2: Tank emptying operation: Press the start control button, the green indicator light comes on, the tank emptying pipeline valve opens automatically, and then the receiving / sending oil pump starts to start the tank emptying operation; when the operation is completed, press the stop control button, the receiving / sending oil pump stops, the red indicator light comes on, and the tank emptying pipeline valve closes automatically; S3: Draining and oil return operation: When draining and oil quality inspection are performed, the oil at the bottom of the oil storage tank is discharged to a closed-circuit sampler or a quality inspection tank; The liquid level in the quality inspection tank is monitored in real time through the liquid level alarm. When the monitoring reaches the high liquid level, the liquid level alarm automatically sends out an audible and visual alarm to prompt the operator to stop the sediment discharge and quality inspection operations. When performing the oil return operation, press the start control button, the green indicator light comes on, the oil return pipeline valve from the quality inspection tank to the filter separator opens automatically, the oil return pump starts, and the oil returns to the oil storage tank after being filtered by the filter separator; when the oil in the quality inspection tank is exhausted, press the stop control button, the oil return pump stops running, the red indicator light comes on, and the oil return pipeline valve closes automatically; S4: High / low level pump stop interlock control: read the oil level information in the oil storage tank through the level meter; during the oil receiving / dispatching operation and tank emptying operation, when the level meter monitors the oil level in the oil storage tank in real time and reaches the high / low level alarm value, the PLC control module outputs control instructions to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time. At the same time, the PLC control module sends an automatic shutdown instruction to the basic oil receiving / dispatching function component, thereby realizing automatic control and avoiding safety accidents such as oil tank overflow and emptying; S5: Interlocking of static grounding alarm and oil receiving / dispatching operation: During skid-mounted oil receiving / dispatching operation, the static clamp of the static grounding alarm is connected to the oil truck, tanker truck or general aviation aircraft respectively to achieve equipotential cross-connection; the static grounding alarm monitors the connection status of the static clamp in real time, and can timely monitor and find that the static clamp falls off during the operation, and the PLC control module outputs control instructions to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time. At the same time, the PLC control module sends an automatic shutdown instruction to the basic oil receiving / dispatching functional components, so as to achieve overall automated control and effectively prevent static fire safety accidents caused by excessive static voltage difference between the skid-mounted and oil trucks, tanker trucks or general aviation aircraft; S6: Oil and gas concentration monitoring and ventilation operation linkage: The oil and gas concentration detector is used to monitor the combustible gas concentration in the skid-mounted site environment in real time; when the skid-mounted oil escapes, bubbles, drips, or leaks, the oil and gas concentration detector will detect the oil vapor dispersed in the air, and then the PLC control module will output control instructions to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time. At the same time, the PLC control module controls the start-up of the explosion-proof fan to speed up the air circulation in the skid-mounted site area to avoid safety accidents such as poisoning of personnel and fire and explosion; S7: Low-temperature automatic heating operation: The skid-mounted ambient temperature is monitored in real time through the ambient temperature sensor. When the skid-mounted ambient temperature is lower than the warning value, the PLC control module supplies power to the heating wire, so that the heating wire is powered to heat the sewage pipeline for automatic heating and insulation to prevent water accumulation in the pipeline from freezing due to low temperature and blocking the pipeline, affecting the skid-mounted production operation. When the skid-mounted ambient temperature is higher than the warning value, the PLC control module stops supplying power to the heating wire; S8: Automatic alarm for interlayer leakage: The interlayer leakage sensor of the oil tank monitors in real time whether the tank wall of the oil tank is in good condition. When the interlayer leakage sensor detects the presence of oil vapor in the interlayer, the PLC control module outputs control instructions to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time, prompting you to check the integrity of the tank wall of the oil tank to prevent oil leakage safety accidents; S9: High-temperature automatic spraying operation: The temperature of the oil in the oil tank is monitored in real time through the oil tank temperature sensor. When the oil temperature is higher than the warning value, the PLC control module supplies power to the spray mechanism, so that the spray mechanism can be heated by electricity to automatically spray the outer wall of the oil tank to reduce the temperature of the oil in the oil tank and the volatilization loss of the oil. When the oil temperature is lower than the warning value, the PLC control module stops supplying power to the spray mechanism; S10: Automatic alarm for overpressure monitoring: The internal pressure of the skid-mounted oil storage tank and its pipeline is monitored in real time through the oil tank pressure sensor and the pipeline pressure sensor. When the value of the monitored skid-mounted oil storage tank and / or skid-mounted pipeline is higher than the warning value, the PLC control module outputs a control command to the sound and light alarm to send out sound and light alarms at the skid-mounted site and the central control room at the same time, prompting the inspection of the pipeline pressure relief safety valve and the fire-blocking breathing valve equipment to prevent equipment damage and oil leakage accidents caused by overpressure; S11: Automatic fire alarm: The fire alarm signal of the skid-mounted refueling device is monitored in real time by the fire detector. When a fire or smoke signal is detected, the PLC control module outputs a control command to the sound and light alarm, which simultaneously sends out sound and light alarms at the skid-mounted site and in the central control room, prompting the user to check whether there is an ignition source in the skid-mounted refueling equipment to prevent fire safety accidents. S12: Collection, display, alarm and transmission of skid-mounted operation parameters: The skid-mounted operation parameters are collected in real time through monitoring equipment and presented to on-site operators through LCD screens to facilitate safe management of the skid-mounted system. At the same time, the above parameters are transmitted to the central control room through 485 signal lines, optical fibers or explosion-proof wireless transmitter components, so as to realize fully automatic, all-day and all-weather on-site unmanned monitoring of the skid-mounted operation status; S13: Emergency stop function: When a safety accident occurs during the production operation of the skid, the emergency stop button can be operated to quickly cut off the power supply of the entire skid and forcibly stop the current production operation, thereby avoiding the occurrence of safety accidents and significantly improving the safety of the overall control application.

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