Explosion-proof chemical tanker high-voltage shore power connection device and using method and safe power connection method of explosion-proof chemical tanker high-voltage shore power connection device

Abstract

The invention discloses a high-voltage shore power connection device of an anti-explosion chemical tanker and a using method and a safe power connection method of the high-voltage shore power connection device. The shell mechanism is arranged in a dangerous area of a ship body of the chemical tanker; the monitoring system is arranged in the shell mechanism; the first end of the pipeline system is communicated with the monitoring system, and the second end of the pipeline system is communicated with a safe area of the ship body of the chemical tanker. For the situation that high-voltage shore power equipment is located in a dangerous area, the safety of the system in a flammable and explosive environment is ensured through overpressure design and air tightness guarantee. The core of the invention lies in that the problems of insufficient explosion-proof design, complicated operation, poor compatibility, low safety and the like in the prior art are solved by introducing fresh air, air tightness design and an intelligent monitoring system, and the requirements of various classification society specifications are met.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of explosion-proof chemical tanker, and particularly relates to an explosion-proof chemical tanker high-voltage shore power connection device, a use method thereof and a safe connection method thereof. BACKGROUND

[0002] In the process of implementing the present application, the inventors found that the prior art at least has the following problems:

[0003] With the increasingly stringent environmental regulations, the use of shore power by ships during port stay has become an important measure to reduce pollutant emissions. The International Maritime Organization (IMO) and various national maritime regulations, such as MARPOL Annex VI, EU Shore Power Directive, etc., encourage or require ships to use shore power in ports to reduce greenhouse gas and harmful pollutant (NOx, SOx, PM) emissions.

[0004] Chemical tankers usually have high explosion-proof requirements due to their special cargo properties. The International Electrotechnical Commission (IEC) has published IEC 60079 series standards for electrical equipment in flammable and explosive environments, and IEC 80005-1:2022 standard for the safety and compatibility of high-voltage shore power systems. However, there are still technical challenges in the high-voltage shore power system suitable for chemical tankers, mainly in the aspects of explosion-proof design, automatic operation and system compatibility.

[0005] Analysis of existing related technologies

[0006] Explosion-proof shore power connection device (CN106711887B), this patent proposes an explosion-proof shore power connection device, mainly used for shore power connection of ships in hazardous environments, with the following characteristics: Explosion-proof design: adopt a first box with explosion-proof function to ensure safety in flammable and explosive environments. Multi-functional plug-in group: including first and second plug-in groups, respectively for connecting AC power lines and DC power lines / signal control lines to meet different power requirements. Safety monitoring: equipped with combustible gas detector, indicator light and space heater to monitor the safety status of the environment in real time and adjust the temperature inside the box.

[0007] The explosion-proof box of the CN106711887B patent is limited to the power connection device, and does not consider the explosion-proof requirements of the entire shore power system, such as the shore power interface, power distribution cabinet, and cable management links. It does not consider the actual arrangement of the ship, such as the location of the high-voltage shore power room, the division of hazardous areas (Zone 0, Zone 1, Zone 2), etc., which may cause some components to still be exposed to explosive environments. The complexity of operation and dependence on manual operation, the CN106711887B patent still requires manual plugging and unplugging of the shore power cable, which cannot achieve fully automated operation, increasing the workload of the crew and may cause safety hazards due to misoperation. SUMMARY

[0008] The technical problem to be solved by the present application is to provide a high-voltage shore power connection device with overpressure gas-tight protection and intelligent safety control function, and its use method and safe power connection method, in the case of high-voltage shore power equipment located in the hazardous area of a chemical tanker, to ensure environmental safety and operation reliability during power connection.

[0009] To this end, the present application provides the following technical solutions:

[0010] By setting an independent sealed high-voltage shore power room and introducing a fresh air system, using an explosion-proof fan and a check valve to continuously send fresh air from the safe area into the shore power room, an environment maintaining 0.025MPa overpressure is formed to prevent external explosive gas from entering;

[0011] An overall gas-tight structure is formed by the gas-tight door, cable perforated cover, and cable sealing element;

[0012] A gas concentration sensor and a gas pressure sensor are provided to build an intelligent monitoring system;

[0013] The intelligent control system controls the on-off of the high-voltage socket box based on sensor signals, and is linked with the ship-shore communication system to realize safe authorized power connection;

[0014] Once the gas concentration or gas pressure is detected to be abnormal, the system will immediately cut off the power and alarm.

[0015] Unlike existing technologies that only have explosion-proof sockets, the present application starts from system safety design, integrates gas-tightness, overpressure control, real-time monitoring, and automatic power-off protection mechanisms, and is suitable for international mainstream ship classification society standards and typical arrangements of chemical tankers. It is a new type of high-voltage shore power connection system that is systematic, highly automated, and highly compatible.

[0016] The use method of the explosion-proof high-voltage shore power connection device for chemical tankers described above,

[0017] Fresh air introduction process:

[0018] 1) The explosion-proof fan introduces fresh air from the safe area and transports it to the high-voltage shore power room through a gas-tight seamless steel pipe;

[0019] 2) The check valve ensures the one-way flow of fresh air;

[0020] 3) The continuous input of fresh air maintains an overpressure environment of 0.025 MPa in the high-voltage shore power room;

[0021] Air tightness guarantee process:

[0022] 1) The air tight door, double-layer cable penetration cover, cable seal and frame work together to ensure the stability of the air pressure difference between the inside and outside of the high-voltage shore power room;

[0023] 2) The outer cover of the double-layer cable penetration cover provides weather protection, and the inner cover ensures the air tightness of the cable penetration through the penetration seal base;

[0024] Exhaust and waste gas treatment:

[0025] 1) The exhaust gas in the high-voltage shore power room is discharged to a safe area through a gravity self-closing bacteria type ventilation duct;

[0026] 2) The exhaust system and the fresh air system work together to ensure the stability of the gas flow and air pressure in the high-voltage shore power room, and the air exchange rate is 15 times per hour;

[0027] Intelligent monitoring and safety control:

[0028] 1) The dangerous gas sensor monitors the concentration of combustible gas inside and outside the high-voltage shore power room in real time, and immediately triggers an alarm and starts the emergency power-off mechanism if dangerous gas is detected;

[0029] 2) The air pressure sensor monitors the air pressure difference inside and outside the high-voltage shore power room in real time to ensure the stability of the overpressure environment; if the air pressure is abnormal, the system automatically adjusts the operation state of the fan or triggers an alarm;

[0030] Emergency power-off mechanism:

[0031] When the sensor detects that the concentration of dangerous gas exceeds the standard or the air pressure is abnormal, the system automatically cuts off the shore power supply and notifies the crew and port management personnel through the intelligent control system; the emergency power-off mechanism is linked with the ship power management system.

[0032] One of the above technical solutions has the following advantages or beneficial effects: for the case that the high-voltage shore power equipment is located in a dangerous area, the safety of the system in a flammable and explosive environment is ensured through overpressure design and air tightness guarantee. The core of the present application is to introduce fresh air, air tightness design and intelligent monitoring system to solve the problems of insufficient explosion-proof design, complex operation, poor compatibility and low safety in the prior art, and to meet the requirements of various ship classification societies. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1The arrangement schematic view of the high-voltage shore power connection device of the explosion-proof chemical tanker provided in the embodiment of the present application is shown in the figure.

[0034] Figure 2 The arrangement schematic view of the high-voltage shore power connection device of the explosion-proof chemical tanker provided in the embodiment of the present application is shown in the figure. Figure 1

[0035] Figure 3 The arrangement schematic view of the high-voltage shore power connection device of the explosion-proof chemical tanker provided in the embodiment of the present application is shown in the figure. Figure 1

[0036] Figure 4 The arrangement schematic view of the high-voltage shore power connection device of the explosion-proof chemical tanker provided in the embodiment of the present application is shown in the figure. Figure 1

[0037] Figure 5 The arrangement schematic view of the high-voltage shore power connection device of the explosion-proof chemical tanker provided in the embodiment of the present application is shown in the figure. Figure 1

[0038] Figure 6 The arrangement schematic view of the high-voltage shore power connection device of the explosion-proof chemical tanker provided in the embodiment of the present application is shown in the figure. Figure 1

[0039] The arrangement schematic view of the high-voltage shore power connection device of the explosion-proof chemical tanker provided in the embodiment of the present application is shown in the figure.

[0040] 1, goose neck air inlet, 2, air-tight seamless steel pipe, 3, check valve, 4, explosion-proof fan, 5, high-voltage shore power room, 6, cable penetration cover, 7, air-tight door, 8, frame, 9, cable sealing element, 10, mushroom ventilator, 11, hazardous gas content sensor, 12, air pressure sensor. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0042] Embodiment one

[0043] Reference is made to Figures 1 to 6 ​​​​​The application discloses a high-voltage shore power connection device for an explosion-proof chemical tanker, and belongs to the field of explosion-proof design of high-voltage shore power connection devices.

[0044] The pipeline system one has a pipeline, a first end of the pipeline is provided with an air inlet, and the air inlet is arranged in the safe area of the ship body; a second end of the pipeline is communicated with the shell mechanism four. A check valve 3 and an explosion-proof fan 4 are further arranged on the pipeline. The shell mechanism four comprises a high-voltage shore power room 5, an upper end of the high-voltage shore power room 5 is provided with a mushroom-shaped ventilation pipe 10; the high-voltage shore power room 5 is further provided with a cable perforated cover 6; and the high-voltage shore power room 5 is further provided with an airtight door 7.

[0045] The monitoring system two comprises a dangerous gas content sensor 11 and an air pressure sensor 12, the dangerous gas content sensor 11 is arranged in the high-voltage shore power room 5, and the air pressure sensors 12 are arranged on the inner side and the outer side of the high-voltage shore power room 5.

[0046] The airtight door 7 can withstand 0.025 MPa overpressure; and a sealing strip is arranged between a door frame of the airtight door 7 and a wall body.

[0047] The cable perforated cover 6 comprises a frame, a cable sealing piece 9 is arranged on the frame, and the cable enters the cable perforated cover 6 and the high-voltage shore power room 5 through the cable sealing piece 9.

[0048] The fresh air introduction system is shown in Figure 1 Fresh air is introduced from a safe area on a poop deck through a goose neck air inlet 1, and is transported to the high-voltage shore power room 5 through an airtight seamless steel pipe 2. The fresh air pipeline is provided with an explosion-proof fan 4 and a check valve 3, so that the fresh air flows in one direction and a 0.025 MPa overpressure environment is maintained.

[0049] The high-voltage shore power room 5 is designed to be airtight, and comprises an airtight door 7, a double-layer cable perforated cover 6, a cable sealing piece 9 and a frame 8, so that an air pressure difference between the inside and the outside of the room is stably maintained at 0.025 MPa.

[0050] An exhaust system: exhaust gas is discharged to the safe area through a roof mushroom-shaped ventilation pipe 10, so that the dangerous gas cannot accumulate in the room.

[0051] Intelligent monitoring system: Install dangerous gas content sensor 11 and air pressure sensor 12 inside and outside the high-voltage shore power room, real-time monitor the environmental safety situation, and link with the control system to realize automatic alarm and emergency power-off function.

[0052] Key components and connection relationship:

[0053] Fresh air pipeline: Use air-tight seamless steel pipe 2 to connect the upper built safety area of the stern tower and the high-voltage shore power room 5. Install explosion-proof fan 4 and check valve 3 on the pipeline to ensure one-way flow of fresh air and maintain overpressure.

[0054] Air-tight door 7: Use air-tight door 7 that can withstand 0.025 MPa overpressure. Use sealing strips between the door frame and the wall to ensure air-tightness.

[0055] Double-layer cable penetration cover 6:

[0056] 1) Outer cover: Removable locking weatherproof cover for protecting the inner cover and preventing external environment from affecting the cable.

[0057] 2) Inner cover: Left and right double-opening hinged air-tight cover with high-voltage cable penetration seal base to ensure air-tightness of cable penetration.

[0058] Exhaust pipeline: Connect the high-voltage shore power room 5 with the roof mushroom ventilator 10. The air door is equipped with gravity self-closing to ensure safe exhaust of waste gas and prevent external water and foreign matter from flowing into the shore power room.

[0059] Sensor system:

[0060] 1) Dangerous gas sensor 11: Installed inside and outside the high-voltage shore power room to real-time monitor the concentration of flammable gas.

[0061] 2) Air pressure sensor 12: Installed inside and outside the high-voltage shore power room to real-time monitor the air pressure difference and ensure the stability of the overpressure environment.

[0062] Example two

[0063] This example mainly explains the establishment and stable maintenance of overpressure explosion-proof environment in the high-voltage shore power room through fresh air introduction, air-tight structure design, exhaust coordination, and intelligent monitoring control. The use method of the above-mentioned explosion-proof chemical tanker high-voltage shore power connection device includes:

[0064] Fresh air introduction and overpressure maintenance:

[0065] 1) Explosion-proof fan 4 introduces fresh air from the upper built safety area of the stern tower, which is transported to the high-voltage shore power room 5 through air-tight seamless steel pipe 2.

[0066] 2) Check valve 3 ensures one-way flow of fresh air to prevent gas backflow.

[0067] 3) New air continuous input, maintain 0.025 MPa overpressure environment in high-voltage shore power room, prevent external explosive gas from entering.

[0068] Air tightness guarantee:

[0069] 1) Air tight door 7, double-layer cable through-hole cover 6, cable sealing element 9 and frame 8 work together to ensure stable air pressure difference between the inside and outside of the high-voltage shore power room.

[0070] 2) The outer cover of the double-layer cable through-hole cover 6 provides weatherproof protection, and the inner cover ensures the air tightness of the cable through-hole through the through-sealing element base.

[0071] Exhaust and waste gas treatment:

[0072] 1) The waste gas in the high-voltage shore power room is discharged to a safe area through the gravity self-closing bacteria type ventilation duct 10 (non-return ventilation).

[0073] 2) The exhaust system and fresh air system work together to ensure stable gas flow and air pressure in the high-voltage shore power room, with 15 air changes per hour.

[0074] Intelligent monitoring and safety control:

[0075] 1) The dangerous gas sensor 11 monitors the concentration of combustible gas inside and outside the high-voltage shore power room in real time. Once dangerous gas is detected, the alarm is triggered and the emergency power-off mechanism is started.

[0076] 2) The air pressure sensor 12 monitors the air pressure difference inside and outside the high-voltage shore power room in real time to ensure stable overpressure environment. If the air pressure is abnormal, the system automatically adjusts the fan operation state or triggers an alarm.

[0077] Example three

[0078] This embodiment mainly describes a high-voltage shore power connection method that realizes whole-process safety control through an intelligent monitoring and control system, focusing on ensuring explosion-proof safety, operation automation and multi-port adaptability during the connection process.

[0079] High-voltage shore power safety connection method:

[0080] This method realizes state perception and control of key steps of connection through an embedded intelligent system, ensuring that all types of non-explosion-proof equipment (such as high-voltage socket boxes) are in a controlled power-off state during the connection process, thereby minimizing the safety risks caused by misoperation or state misjudgment.

[0081] The safety connection method of the above-mentioned high-voltage shore power connection device for explosion-proof chemical tankers includes the following steps:

[0082] 1. Initial stage of operation, the crew actively cuts off the power supply of the high-voltage socket box through the console, ensuring that all non-explosion-proof electrical equipment is in a voltage-free state before connection operation;

[0083] 2. The system automatically allows power supply again only when all the following safety conditions are met through real-time multi-parameter detection:

[0084] · The shore power cable connection is completed and stable;

[0085] · The gas sensor detection value is within the safe threshold range, and there is no combustible gas alarm;

[0086] · The ventilation fan is operating normally, forming an effective ventilation channel;

[0087] · The differential pressure sensor confirms the internal overpressure state of the high-voltage shore power room (relative atmospheric pressure higher than 0.025 MPa);

[0088] · The door limit switch feedback indicates that the high-voltage shore power room door is closed;

[0089] 3. After the high-voltage socket box is closed, the system automatically confirms the establishment of the safety loop state, and the crew can manually disconnect the grounding switch under the system indication;

[0090] 4. Finally, after the ship and the shore confirm the correct operation state through the two-way wireless communication system, the safe closing and power supply operation of the high-voltage shore power can be performed.

[0091] Emergency power-off mechanism:

[0092] When the sensor detects that the concentration of dangerous gas exceeds the standard or the gas pressure is abnormal, the system automatically cuts off the shore power supply and notifies the crew and port management personnel through the intelligent control system.

[0093] The emergency power-off mechanism is linked with the ship power management system PMS to ensure quick and reliable power-off operation.

[0094] Technical effects

[0095] High safety: through overpressure design and air tightness guarantee, ensure the safety of high-voltage shore power room 5 in flammable and explosive environment, meet the requirements of various ship classification societies.

[0096] Automatic operation: intelligent monitoring system and control system linkage, realize automatic alarm and emergency power-off, reduce manual intervention and reduce operation risk.

[0097] Strong compatibility: the system design considers the compatibility of different port shore power standards, such as voltage level 6.6kV, frequency 50Hz / 60Hz and different types of shore power interface IEC 80005-1, suitable for various ships and ports.

[0098] Overpressure design and air tightness guarantee: By introducing fresh air, air tight door 7, double layer cable penetration cover 6, cable sealing 9 and frame 8, the safety of high voltage shore power room 5 in dangerous area is ensured.

[0099] Intelligent monitoring and emergency power-off mechanism: The integration of dangerous gas sensor 11 and air pressure sensor 12 realizes real-time monitoring and automatic power-off, improving system safety.

[0100] Modular and compatibility design: The system is designed modularly, which is easy to adapt to different ships and ports, improving compatibility and applicability.

[0101] Fresh air introduction system: According to the actual layout of the ship, the fresh air pipeline path is designed to ensure efficient and stable fresh air delivery.

[0102] High voltage shore power room layout: According to the division of Zone 1 and Zone 2 in dangerous area, the position of high voltage shore power room is reasonably arranged to ensure system safety.

[0103] Intelligent monitoring system installation: According to the structure of high voltage shore power room and cable arrangement, sensors are installed reasonably to ensure accurate and reliable monitoring data.

[0104] System debugging and testing: System debugging and testing are carried out in the actual operation environment of the ship to ensure normal operation of various functions and meet the requirements of major classification societies.

[0105] 1) Comprehensive explosion-proof design: The invention not only designs explosion-proof for the interface device, but also explosion-proof for the entire shore power system including shore power interface, distribution cabinet and cable management, to ensure the safety of the system in dangerous areas.

[0106] 2) Overpressure environment guarantee: By introducing fresh air and maintaining an overpressure environment of 0.025MPa, the invention prevents external explosive gas from entering the high voltage shore power room, solving the problem of incomplete explosion-proof design in the prior art.

[0107] Complexity of operation and dependence on manual operation:

[0108] 1) Automatic operation: The invention realizes automatic alarm and emergency power-off through the linkage of intelligent monitoring system and control system, reducing manual intervention and operation risk.

[0109] 2) Air tightness design: Through air tight door 7, double layer cable penetration cover 6, cable sealing 9 and frame 8, the safety of the system during operation is ensured, reducing the safety hazards caused by manual operation.

[0110] Compatibility problem:

[0111] 1) Modular design: The present application adopts modular design, which is convenient for adapting to different port shore power standards, such as voltage grade 6.6kV, frequency 50Hz / 60Hz and different types of shore power interface IEC 80005-1, improving the compatibility and applicability of the system.

[0112] 2) Unified control strategy: The present application provides a unified shore power control strategy, ensuring that different types of ships do not need additional adaptation when accessing different ports, reducing cost and operation complexity.

[0113] Insufficient safety circuit and emergency power-off mechanism:

[0114] 1) Intelligent monitoring system: The present application integrates a dangerous gas sensor 11 and a gas pressure sensor 12 to monitor the environmental safety in real time, and links with the control system to realize automatic alarm and emergency power-off function.

[0115] 2) Emergency power-off mechanism: When the sensor detects that the concentration of dangerous gas exceeds the standard or the gas pressure is abnormal, the system automatically cuts off the shore power supply, and notifies the crew and port management personnel through the intelligent control system, ensuring that the power-off operation is fast and reliable.

[0116] Through the above technical solutions, the present application provides a new type of high safety, high automation and high compatibility high-voltage shore power connection system for explosion-proof chemical tanker, which solves the defects of the prior art and meets the special needs of chemical tanker using high-voltage shore power in dangerous areas.

[0117] Example four

[0118] This embodiment mainly illustrates that the present application realizes the intrinsic safety, explosion-proof ability and multi-port adaptability of high-voltage shore power system suitable for dangerous areas of chemical tanker through overpressure and air-tight structure design, intelligent monitoring and automatic control, safety circuit and emergency power-off linkage, modular compatibility design and exhaust system integration, and fills the technical gap in this field.

[0119] Through overpressure design, air-tightness guarantee and intelligent monitoring system, the safety, automation control and compatibility problems of high-voltage shore power system of chemical tanker in dangerous areas are solved. Specifically, the following core contents are included:

[0120] Overpressure design and air-tightness guarantee

[0121] 1) By introducing fresh air from the safety zone on the poop, and maintaining an overpressure environment of 0.025MPa in the high-voltage shore power room, the entry of external explosive gas is prevented.

[0122] 2) Air-tight seamless steel pipe 2, explosion-proof fan 4 and non-return air valve 3 are adopted to ensure one-way flow of fresh air and maintain overpressure.

[0123] 3) High-voltage shore power room 5 uses air-tight door 7, double-layer cable penetration cover 6, cable seal 9 and frame 8 to ensure stable pressure difference between inside and outside of the room.

[0124] Intelligent monitoring and automatic operation

[0125] 1) Integrated hazardous gas sensor 11 and air pressure sensor 12 to monitor environmental safety in real time and link with control system to realize automatic alarm and emergency power-off function.

[0126] 2) Intelligent control system to realize automatic control of shore power connection, reduce manual intervention and improve operation efficiency and safety.

[0127] Compatibility design

[0128] 1) Modular design to flexibly adapt to different shore power standards of different ports, such as voltage level 6.6kV, frequency 50Hz / 60Hz and different types of shore power interface IEC 80005-1.

[0129] 2) Unified shore power control strategy to ensure no additional adaptation when different types of ships access different ports.

[0130] Safety circuit and emergency power-off mechanism

[0131] 1) When the sensor detects that the concentration of hazardous gas exceeds the standard or the air pressure is abnormal, the system automatically cuts off the shore power supply and notifies the crew and port management personnel through the intelligent control system.

[0132] 2) Emergency power-off mechanism linked with ship power management system PMS to ensure quick and reliable power-off operation.

[0133] Exhaust system

[0134] 1) Exhaust duct: connects high-voltage shore power room 5 with roof mushroom vent 10, uses air-tight design to ensure safe exhaust of waste gas.

[0135] 2) Waste gas treatment: exhausts waste gas through roof mushroom vent 10 to a safe area to ensure that hazardous gas does not accumulate in the room.

[0136] Explosion-proof area shore power device:

[0137] 1) Compliance with major classification society regulations: the design of the invention fully complies with the requirements of major classification society regulations, ensuring high safety and reliability of the system.

[0138] 2) No public literature or product has disclosed an explosion-proof shore power device with the structure described in the invention: the invention is a high-voltage shore power device for chemical tanker explosion-proof areas, filling the technical gap in this field.

[0139] The specific implementation of overpressure design and air tightness guarantee, such as the fresh air introduction system, air tight door 7, double layer cable penetration cover 6, cable sealing element 9 and frame 8.

[0140] The specific implementation of intelligent monitoring and automatic control, such as the integration and application of dangerous gas sensor 11, air pressure sensor 12 and intelligent control system.

[0141] The specific implementation of compatibility design, such as modular design and unified control strategy.

[0142] The specific implementation of safety circuit and emergency power-off mechanism, such as the linkage control of emergency power-off mechanism and ship power management system PMS.

[0143] The specific implementation of exhaust system, such as exhaust duct and waste gas treatment design.

[0144] Advantages:

[0145] 1. Overall improvement of explosion-proof safety

[0146] 1) Comprehensive explosion-proof design: Unlike existing technology that only designs explosion-proof for electrical devices, the present invention comprehensively explosion-proof processes the entire high-voltage shore power system, including shore power interface, distribution cabinet, cable management and high-voltage shore power room, to ensure the safety of the system in flammable and explosive environments.

[0147] 2) Overpressure environment guarantee: By introducing fresh air and maintaining an overpressure environment of 0.025MPa, it effectively prevents external explosive gases from entering the high-voltage shore power room 5, solving the problem of incomplete explosion-proof design in existing technology, where some parts are still exposed to dangerous environments.

[0148] 2. High automation, reducing manual intervention

[0149] 1) Intelligent monitoring and automatic control: The present invention integrates dangerous gas sensor 11 and air pressure sensor 12, which can monitor the environmental safety in real time and link with the control system to realize automatic alarm and emergency power-off function, greatly reducing manual intervention and reducing operation risk.

[0150] 2) Automatic operation process: Shore power remote control connection, disconnection, and real-time monitoring of the safety state of the shore power room. Crews only need to complete a small amount of operations such as power-off, wiring and authorization confirmation according to system prompts, effectively controlling human error. In abnormal conditions, alarm signals are sent to each control station of the ship, improving operation efficiency and safety.

[0151] 3. Strong compatibility, suitable for various port standards

[0152] 1) Modular design: The invention adopts a modular design, which can flexibly adapt to different port shore power standards, such as voltage level 6.6kV, frequency 50Hz / 60Hz, and different types of shore power interface IEC 80005-1, solving the problem of poor compatibility of existing technology.

[0153] 2) Unified control strategy: Provides a unified shore power control strategy, ensuring that different types of ships do not need additional adaptation when accessing different ports, reducing operational complexity and cost.

[0154] 4. Perfect safety circuit and emergency power-off mechanism

[0155] 1) Intelligent safety monitoring: Real-time monitoring of environmental safety conditions through hazardous gas sensor 11 and air pressure sensor 12, once the concentration of hazardous gas exceeds the standard or the air pressure is abnormal, the system will immediately trigger an alarm and start the emergency power-off mechanism, ensuring the system's rapid response in emergency situations.

[0156] 2) Emergency power-off linkage: The emergency power-off mechanism is linked with the ship power management system PMS, ensuring quick and reliable power-off operation, avoiding the safety risks caused by the imperfect emergency power-off mechanism in existing technology.

[0157] 5. Air-tight design to ensure system stability

[0158] 1) Air-tight door 7 and double-layer cable penetration cover 6: The air-tight door 7 and double-layer cable penetration cover 6 can withstand 0.025MPa overpressure, ensuring the air-tightness between high-voltage shore power, preventing external explosive gas from entering, solving the problem of insufficient air-tightness in existing technology.

[0159] 2) Air-tight seamless steel pipe 2 and explosion-proof fan 4: The fresh air duct uses air-tight seamless steel pipe 2, equipped with explosion-proof fan 4 and check valve 3, ensuring one-way flow of fresh air and maintaining overpressure environment, improving the stability and reliability of the system.

[0160] 6. International first, filling the technical gap

[0161] 1) There is no public literature or product disclosing the explosion-proof shore power device with the structure described in the invention: The invention is a high-voltage shore power device suitable for chemical tanker explosion-proof areas, filling the technical gap in this field, meeting the special needs of chemical tankers using high-voltage shore power in dangerous areas.

[0162] 2) Comply with major classification society regulations: The design of the invention fully complies with the requirements of major classification society regulations, ensuring the high safety and reliability of the system.

[0163] 7. Reduce operating costs and improve economic benefits

[0164] 1) Reduce labor costs: through automatic control and intelligent monitoring, reduce manual intervention and operation complexity, reduce labor costs.

[0165] 2) Prolong the service life of the equipment: through the design of airtightness and overpressure environment protection, reduce the loss of the equipment in dangerous environment, prolong the service life of the equipment, reduce the maintenance cost.

[0166] 3) Improve the adaptability of the port: compatible with various port shore power standards, reduce the adaptation cost of the ship in different ports, improve the operation efficiency.

[0167] 8. Environmental protection and energy saving

[0168] 1) Reduce pollutant emissions: by using shore power instead of ship auxiliary engine power generation, significantly reduce the emissions of greenhouse gases and harmful pollutants NOx, SOx and PM, meet the environmental protection requirements of International Maritime Organization IMO and various countries' maritime regulations.

[0169] 2) Energy saving: intelligent control system optimizes the power utilization efficiency, reduces energy waste, further improves the energy saving effect of the system.

[0170] In summary, the present application improves the safety, reliability and economy of the high-pressure shore power system of the chemical tanker through comprehensive explosion-proof design, highly automated operation, strong compatibility, perfect safety circuit and emergency power-off mechanism, airtightness protection and internationally pioneering technical advantages, solves the defects of the prior art, has wide application prospect and significant social and economic benefits.

[0171] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0172] In the present application, unless otherwise specified and limited, the terms "mounting", "setting", "connecting", "fixing", "screwed" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specified, the above-mentioned terms in the present application can be understood according to the specific meaning of the above-mentioned terms in the present application according to the specific situation.

[0173] While embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and variations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-voltage shore power connection device for an explosion-proof chemical tanker, characterized in that It comprises: a hull; a shell mechanism arranged in a dangerous area of the hull and forming a high-voltage shore power room; a pipeline system having one end connected to an air inlet provided with a vent in a safe area and the other end communicated with the shell mechanism, the pipeline system being provided with an explosion-proof fan and a check valve to form a fresh air introduction system; a monitoring system arranged in the high-voltage shore power room and comprising a gas concentration sensor and a gas pressure sensor for monitoring the concentration of combustible gas and the pressure difference between the inside and outside of the high-voltage shore power room, respectively; a sealing structure comprising an air-tight door, a cable perforation cover, a cable sealing element and a frame.

2. The explosion-proof chemical ship high-voltage shore power connection device according to claim 1, characterized by The vent is a swan-neck air inlet, and the pipeline is an air-tight seamless steel pipe.

3. The high pressure shore power connection arrangement of the explosion-proof chemical tanker according to claim 1 or 2, characterized in that The cable perforation cover is a double-layer structure, the outer layer being a weather-tight protective cover, and the inner layer being air-tightly sealed at the perforation by the cable sealing element.

4. The high-voltage shore power connection arrangement of any one of claims 1 to 3, characterized in that The air-tight door can withstand an overpressure of 0.025 MPa, and a sealing strip is arranged between the door frame and the wall.

5. The apparatus of any one of claims 1 to 4, wherein, The monitoring system is linked with an intelligent control system to automatically trigger a power-off mechanism when an abnormality is detected.

6. The high-voltage shore power connection arrangement of an explosion-proof chemical tanker according to any one of claims 1 to 5, characterized in that A mushroom-type ventilation duct is arranged at the top of the shell mechanism to guide the discharge of exhaust gas to a safe area.

7. The high-voltage shore power connection arrangement of an explosion- proof chemical tanker according to any one of claims 1 to 6, characterized in that It includes a voltage level of 6.6 kV, a frequency of 50 Hz / 60 Hz and an IEC 80005-1 interface.

8. The high-voltage shore power connection arrangement of an explosion- proof chemical tanker according to any one of claims 1 to 7, characterized in that The output signal of the sensor system is connected to the ship power management system to realize linkage control.

9. A method of using a high-voltage shore power connection arrangement for an explosion- proof chemical tanker according to any one of claims 1 to 8, characterized in that It comprises the following steps: Fresh air introduction process: 1) The explosion-proof fan introduces fresh air from the safe area to the high-voltage shore power room through the air-tight seamless steel pipe; 2) The check valve ensures one-way flow of fresh air; 3) Fresh air is continuously input to maintain an overpressure environment of 0.025 MPa in the high-voltage shore power room; Air-tightness guarantee process: 1) The air-tight door, double-layer cable perforation cover, cable sealing element and frame work together to ensure that the pressure difference between the inside and outside of the high-voltage shore power room is stable; 2) The outer cover of the double-layer cable perforation cover provides weather-tight protection, and the inner cover ensures the air-tightness of the cable perforation through the through-sealing element base; Exhaust and waste gas treatment: 1) The exhaust gas in the high-voltage shore power room is discharged to a safe area through the gravity self-closing mushroom-type ventilation duct; 2) The exhaust system and the fresh air system work together to ensure stable gas flow and pressure in the high-voltage shore power room, and the air exchange frequency is 15 times per hour; Intelligent monitoring and safety control: 1) The combustible gas sensor monitors the concentration of combustible gas inside and outside the high-voltage shore power room in real time, and immediately triggers an alarm and starts an emergency power-off mechanism if dangerous gas is detected; 2) The gas pressure sensor monitors the pressure difference between the inside and outside of the high-voltage shore power room in real time to ensure that the overpressure environment is stable; if the pressure is abnormal, the system automatically adjusts the fan operating state or triggers an alarm.

10. The safety power connection method of the explosion-proof chemical ship high-voltage shore power connection device according to any one of claims 1 to 8, comprising the following steps: 1) The crew cuts off the power supply of the high-voltage socket box through the control console to ensure that the non-explosion-proof equipment is in a power-off state; 2) The system automatically detects and judges whether all the following safety conditions are met: (1) The shore power cable connection is completed; (2) No combustible gas over-limit is detected in the high-voltage shore power room; (3) The ventilation fan is operating normally; (4) The gas pressure sensor detects that the indoor air pressure is higher than the environment by 0.025 MPa; (5) The door limit switch confirms that the door is closed. 3) After confirming that the safety condition is met, the system allows the high-voltage socket box to restore power supply and establish a safety loop; 4) The crew manually disconnects the grounding switch according to the system prompt; 5) After confirming that there is no error through two-way communication between the ship and the shore, the high-voltage closing operation is performed to complete the shore power supply connection; Among them, the emergency power-off mechanism: when the sensor detects that the concentration of flammable gas exceeds the limit or the air pressure is abnormal, the system automatically cuts off the power supply, and the ship power management system is linked to issue an alarm prompt; When the sensor detects that the concentration of dangerous gas exceeds the standard or the air pressure is abnormal, the system automatically cuts off the shore power supply and notifies the crew and port management personnel through the intelligent control system; the emergency power-off mechanism is linked with the ship power management system.

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