CN115576237B - Marine filling equipment electrical system - Google Patents

Abstract

The present invention discloses an electric control system for marine filling equipment, including at least two emergency separation systems, at least two actuation power systems, at least two ship distance monitoring devices, at least two power pipeline connection plates, a control cabinet, and a manual operation box; the electric control system can be compatible with and control two types of filling equipment on the same filling ship, and respond to ship-to-ship emergency separation triggered by ship drift and manual operation. The two types of filling equipment on the filling ship can be randomly and interchangeably installed on the filling station on the port or starboard side of the ship, and the filling ship can also randomly use the filling station on the port or starboard side for filling operations, and the system can automatically select one from multiple ship distance monitoring devices for signal monitoring; when an emergency separation alarm occurs, the system can automatically identify the currently connected filling equipment and trigger the corresponding emergency separation action.

Description

Marine fueling equipment electronic control system

Technical Field

The invention belongs to the technical field of electronic control of loading and unloading equipment, and in particular to an electronic control system suitable for marine filling equipment.

Background Art

The marine bunkering system is installed on the LNG bunkering ship and is used for bunkering ships to bunker LNG to fuel tankers. During the ship-to-ship bunkering process, the bunkering equipment electronic control system monitors the distance between ships in real time through the ship distance monitoring device (VSD). When the distance exceeds the set value, the electronic control system will trigger the emergency release device (ERC) to release the hose connection between the ships safely, avoiding damage to the hose or ship caused by drift. The release action can also be triggered manually.

In the field of maintenance and modification of bunkering ships, two types of bunkering equipment have emerged to serve the application needs of a bunkering ship. The two types of bunkering equipment can be randomly installed on the port and starboard bunkering stations of the bunkering ship. Depending on the working conditions, one type of bunkering equipment can be randomly selected for bunkering operations. The two types of bunkering equipment are equipped with an emergency release system (ERS) and a VSD, respectively. This puts forward new requirements for the electronic control system of the bunkering equipment: the electronic control system should be able to automatically identify the bunkering station and bunkering equipment selected for the current bunkering operation, and monitor the corresponding VSD signal. When an emergency release signal appears, the corresponding ERC action is triggered.

Summary of the invention

The object of the present invention is to provide an electronic control system for marine bunkering equipment, so as to solve the compatibility control problem when two types of bunkering equipment exist on a bunkering ship at the same time.

The technical solution to achieve the purpose of the present invention is: an electronic control system for marine bunkering equipment, the system comprising at least two emergency detachment systems, at least two actuation power systems, at least two ship distance monitoring devices, at least two power pipeline connection plates, and a control cabinet; the electronic control system can be compatible with controlling at least two bunkering equipment on the same bunkering ship, and respond to the emergency detachment of the ship;

The actuation power system is used to provide power for the emergency release system, and includes a valve position sensor installed at the power outlet safety valve, the sensor is used to determine the filling status of each filling device, and the filling status is used to select the emergency release actuator;

The power pipeline connection plates all include an actuating pipeline connection state sensor, which is used to select a ship distance monitoring device;

The ship distance monitoring device includes a distance monitoring sensor. When the ship distance drifts to a value greater than a set value, the system will trigger an alarm.

The emergency disengagement system will be controlled to disengage when the ship distance monitoring device triggers the emergency disengagement alarm;

The control cabinet is installed in the ship's machinery space and integrates the electrical logic operation and command output functions of the hose filling system.

Furthermore, the system also includes at least one manual operation box for manually triggering the emergency disengagement action.

Further, the actuation power system includes a hydraulic station and a high-pressure nitrogen station;

The emergency release system includes a hydraulically powered emergency release system and a high-pressure nitrogen powered emergency release system, denoted as hydraulic ERS and pneumatic ERS, which are powered by a hydraulic station and a high-pressure nitrogen station, respectively, and both emergency release systems are installed at two bunkering stations on both sides of the ship; the electronic control system is equipped with at least one emergency release system, and each emergency release system is equipped with at least two ship distance monitoring devices VSD, which are installed on the port and starboard sides of the ship, respectively, for detecting the distance between the bunkering ship in a connected state and the receiving ship; the hydraulic ERS and pneumatic ERS are equipped with hydraulic connection hoses and nitrogen connection hoses, respectively;

The power pipeline connection plate includes a hydraulic pipeline connection plate and a nitrogen pipeline connection plate. The electronic control system is equipped with at least two sets of hydraulic pipeline connection plates, which are respectively located on the port side and starboard side of the ship near the filling station, and at least two sets of nitrogen pipeline connection plates are also respectively located on the port side and starboard side of the ship near the filling station; each set of hydraulic pipeline connection plates includes the same number of hydraulic pipe connection ports as the number of emergency release systems m, which are used to connect the hydraulic oil to the m sets of hydraulic ERS at the filling station; each set of nitrogen pipeline connection plates includes the same number of high-pressure nitrogen connection ports as the number of emergency release systems m, which are used to connect the high-pressure nitrogen to the m sets of pneumatic ERS at the filling station; when the connecting hose is connected to the fixed connection port of the power pipeline connection plate, the safety proximity switch sensor installed on the connection plate will be triggered. Through the sensor signal on the connection plate, the system can determine whether the filling station position currently connected to the two filling equipment is the port side or the starboard side, and this signal will be used as the basis for selecting the VSD signal during the filling operation.

Further, the filling system sends two ready signals to the customer system through the serial communication interface, indicating that the hydraulic ERS system and the pneumatic ERS system are ready;

Ready signal and valve position interlock of ERS safety valve;

There is a logical interlock between the hydraulic and pneumatic ready signals, so that both cannot be in the ready state at the same time. When an emergency disengagement occurs, the system only outputs the disengagement action solenoid valve action signal corresponding to the filling equipment currently in the ready state, and does not output the solenoid valve action corresponding to the filling equipment in the non-ready state;

(1) Ready signal "Ready For Transfer 1" indicates that the hydraulic ERS is ready; this signal is "1" when the following conditions are met at the same time;

The ERS safety valve of the hydraulic station is in the open position;

Hydraulic system has no fault alarm;

The ERS safety valve of the high-pressure nitrogen station is in the closed position;

The hydraulic pipeline connection plate on either side detects the connection in place signal;

(2) Ready signal "Ready For Transfer 2" indicates that the pneumatic ERS is ready; this signal is "1" when the following conditions are met at the same time;

The ERS safety valve of the high-pressure nitrogen station is in the open position;

High-pressure nitrogen station has no fault alarm;

The ERS safety valve of the hydraulic station is in the closed position;

The nitrogen pipeline connection panel on either side detects the connection in place signal.

Furthermore, the VSD supporting the hydraulic ERS includes: a first ESD0 proximity switch, a first ESD1 proximity switch and two first ESD2 proximity switches, which are used to detect the position of the emergency disengagement safety valve and generate the safety valve switch state, i.e., the ESD state, and specifically generate the ESD0 state, i.e., the pre-alarm state, the ESD1 state, i.e., the first-level alarm state, and the ESD2 state, i.e., the second-level alarm state, respectively;

The VSD supporting the pneumatic ERS includes: a second ESD1 proximity switch and two second ESD2 proximity switches, which respectively generate an ESD1 state, i.e., a first-level alarm state, and an ESD2 state, i.e., a second-level alarm state;

The manual operation box includes: an ESD2 emergency disengagement trigger button, a reset button, an ESD1 indicator light, an ESD2 indicator light, a system operation indicator light, and a buzzer with light for issuing ESD0, ESD1, and ESD2 sound and light alarms.

Further, the hydraulic station comprises an oil tank, a main motor, a backup motor, a main pump, an auxiliary pump, a hydraulic oil heater, a disengagement solenoid valve, a hot oil circulation solenoid valve, an accumulator solenoid valve, an accumulator and a motor start/stop button;

The main motor and the standby motor are started in turn;

The accumulator is used for emergency disengagement and operation in case of power failure;

The hydraulic oil heater is used to heat the hydraulic oil in the oil tank;

The main pump is used to provide the hydraulic power required for the emergency release system ERC action and accumulator charging. The main pump outputs power when the main pump solenoid valve is energized;

The auxiliary pump is used to provide the hydraulic power required for hot oil circulation. When the auxiliary pump unloading solenoid valve loses power, the auxiliary pump outputs power; when the auxiliary pump unloading solenoid valve is energized, the auxiliary pump is unloaded and does not output pressure oil;

The disengagement solenoid valve is used to open the ERC disengagement oil circuit;

The hot oil circulation solenoid valve is used to close the ERC disengagement oil circuit and open the ERC hot oil circulation oil circuit;

The accumulator solenoid valve is used to open the oil circuit for the accumulator to provide power to the outside;

The main motor and the backup motor are provided with an interlocking mechanism so that the two motors will not run at the same time; the two motors are started in turn, and the hydraulic station starts the backup motor that was last running; in addition, when the main motor has not started after a certain period of time after the motor start command is issued, the backup motor starts automatically, and the control cabinet communication interface sends the motor fault status information to the customer system;

(1) The initial conditions for starting the main motor and the standby motor are:

The motor can be started only when the following conditions are met at the same time:

The motor has stopped;

There is no fault feedback from the motor circuit breaker and starter;

No hydraulic oil low level alarm;

The oil tank temperature is higher than the low temperature setting value T1;

The motor starts when any of the following conditions are met:

The operator presses the motor start button on the hydraulic station;

The system enters the ready state; the ready state means that the hydraulic ERS is ready;

The system enters ESD1 state;

The system enters ESD2 state;

(2) Conditions for motor stopping:

In the non-ready state, the operator presses the motor stop button of the hydraulic station;

The system enters a non-ready state;

A low oil level alarm occurs;

Motor circuit breaker and starter feedback motor fault;

(3) Management of main pump:

The main pump solenoid valve is energized under the following conditions:

In the ready state, the pressure of the hydraulic station accumulator is lower than the low pressure setting value;

The system enters ESD1 state;

The system enters ESD2 state.

The conditions for the main pump solenoid valve to lose power are:

The system enters a non-ready state;

In the non-ESD state, the accumulator pressure rises to the high pressure setting value for a full t1 time;

In the non-ESD state, the pressure of the accumulator is lower than the low pressure setting value, the main pump has been running continuously for a full t2 time, and the pressure of the accumulator has not yet reached a high pressure setting value; t2>t1;

System ESD1 and ESD2 status reset;

(4) Auxiliary pump management:

The conditions for the auxiliary pump unloading solenoid valve to be energized are: the system enters the ESD1 state; the system enters the ESD2 state;

The condition for the auxiliary pump unloading solenoid valve to lose power is: the system ESD1 and ESD2 status are reset;

(5) Hydraulic oil heater:

The power-on condition is: in the ready state, the oil tank temperature is lower than the set temperature T2, T2>T1;

The power failure condition is: in the ready state, the oil tank temperature is higher than the set temperature T3, T3>T2; the system enters the non-ready state;

(6) Hot oil circulation:

When the system is in the ready state and not in the ESD1 or ESD2 state, hot oil circulation is maintained in the ERC hydraulic pipeline; when the system enters the ready state, the hot oil circulation solenoid valve is energized; when the system enters the ESD1/ESD2 state, the hot oil circulation solenoid valve loses power;

The conditions for the hot oil circulation solenoid valve to be energized are: the system enters the ready state; in the ready state, the ESD1 and ESD2 states are reset;

The conditions for the hot oil circulation solenoid valve to lose power are: the system enters the ESD1 state; the system enters the ESD2 state; the system enters the non-ready state.

Further, the high-pressure nitrogen station includes an instrument air nitrogen tank, a power nitrogen tank, a first emergency disengagement solenoid valve SOV1, a second emergency disengagement solenoid valve SOV2, an instrument air nitrogen tank pressure transmitter PT1, a power nitrogen tank pressure transmitter PT2, an instrument air pressure transmitter PT3 and an ERC pipeline pressure transmitter PT4;

The first emergency disengagement solenoid valve SOV1 is used to open the ERC disengagement gas circuit;

The second emergency disengagement solenoid valve SOV2 is used to open the ERC disengagement gas circuit and is redundant with SOV1;

The instrument air nitrogen tank pressure transmitter PT1 is used to measure the pressure of the instrument air nitrogen tank;

The power nitrogen tank pressure transmitter PT2 is used to measure the power nitrogen tank pressure;

The instrument air pressure transmitter PT3 is used to measure the instrument air pressure;

The ERC pipeline pressure transmitter PT4 is used to measure the PERC pipeline pressure;

The specific management of the high-pressure nitrogen station is as follows:

(1) When the pressure of the instrument air nitrogen tank is less than the set value P1, the system sends an "instrument air nitrogen tank pressure low" alarm signal to the customer system through the serial communication interface;

(2) When the pressure of the power nitrogen tank is less than the set value P2, the system sends a "power nitrogen tank pressure low" alarm signal to the customer system through the serial communication interface;

(3) When the instrument air pressure is less than the set value P3, the system sends an "instrument air pressure low" alarm signal to the customer system through the serial communication interface;

(4) When the instrument air pressure is greater than the set value P4, the system sends an "instrument air pressure high" alarm signal to the customer system through the serial communication interface; P4>P3;

(5) When the ERC pipeline pressure is lower than the set value P5, the system sends an "ERC pipeline leakage" alarm signal to the customer system through the serial communication interface.

Compared with the prior art, the present invention has the following significant advantages: the two types of bunkering equipment on the bunkering ship can be randomly and interchangeably installed on the bunkering station on the port or starboard side of the ship, and the bunkering ship can also randomly use the bunkering station on the port or starboard side for bunkering operations, and the system can automatically select one from multiple ship distance monitoring devices for signal monitoring; when an emergency separation alarm occurs, the system can automatically identify the currently connected bunkering equipment and trigger the corresponding emergency separation action.

The present invention is further described in detail below in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a schematic diagram of the electronic control system of the marine filling equipment.

Figure 2 is a schematic diagram of the layout of the ship distance monitoring device.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

In conjunction with FIG1 , the present invention provides an electronic control system for marine bunkering equipment, the system comprising at least two emergency detachment systems, at least two actuation power systems, at least two ship distance monitoring devices, at least two power pipeline connection plates, and a control cabinet; the electronic control system can be compatible with controlling at least two bunkering equipment on the same bunkering ship, and respond to the emergency detachment of the ship;

The actuation power system is used to provide power for the emergency release system, and includes a valve position sensor installed at the power outlet safety valve, the sensor is used to determine the filling status of each filling device, and the filling status is used to select the emergency release actuator;

The power pipeline connection plates all include an actuating pipeline connection state sensor, which is used to select a ship distance monitoring device;

The ship distance monitoring device includes a distance monitoring sensor. When the ship distance drifts to a value greater than a set value, the system will trigger an alarm.

The emergency disengagement system will be controlled to disengage when the ship distance monitoring device triggers the emergency disengagement alarm;

The control cabinet is installed in the ship's machinery space and integrates the electrical logic operation and command output functions of the hose filling system.

As a specific example, the present invention is further described.

The system includes six ERS, three of which are hydraulically powered and three are high-pressure nitrogen powered. The two types of ERS are installed at two filling stations on both sides of the ship, and both types of ERS can meet the installation and use requirements of the filling stations on both sides.

(1) The hydraulic station provides power for three hydraulic ERS. The capacity of the hydraulic station is determined by the number of ERCs (emergency release devices) in the hose filling system and the capacity of the accumulator. The hydraulic station consists of the following parts:

-tank;

-Dual motors, one main and one backup, start in turns;

- Main pump, which provides the hydraulic power required for ERC action and accumulator charging. The main pump outputs power when the main pump solenoid valve is energized;

- Auxiliary pump, providing the hydraulic power required for hot oil circulation. When the auxiliary pump unloading solenoid valve loses power, the auxiliary pump outputs power;

- Filters;

-Pressure gauge and pressure regulator;

-Hand pump;

-Hydraulic oil heater, used to directly heat the hydraulic oil in the tank;

-Disengagement solenoid valve, used to open the ERC disengagement oil circuit;

-Hot oil circulation solenoid valve, used to close the ERC disengagement oil circuit and open the ERC hot oil circulation oil circuit;

-Accumulator solenoid valve, used to open the oil circuit for the accumulator to provide power to the outside;

-Accumulators for emergency disconnection and operation in case of power failure;

- Protective box;

-Temperature and liquid level sensors;

-Proximity switch, detects the position of the emergency release safety valve and reflects the switch status of the safety valve;

-Control panel with integrated motor start and stop buttons and hydraulic status indicator lights.

(2) High-pressure nitrogen station provides power for three pneumatic ERS. It includes the following parts:

-Instrument air nitrogen tank;

-Power nitrogen tank;

-The first emergency disengagement solenoid valve SOV1 is used to open the ERC disengagement gas circuit;

-The second emergency disengagement solenoid valve SOV2 is used to open the ERC disengagement gas line and is redundant with SOV1;

- The first emergency disengagement manual valve proximity switch EOS1;

-Second emergency release safety valve proximity switch EOS2;

-Instrument air nitrogen tank pressure transmitter PT1;

-Power nitrogen tank pressure transmitter PT2;

-Instrument air pressure transmitter PT3;

-ERC pipeline pressure transmitter PT4;

The control cabinet is installed in the ship's machinery space and integrates the electrical logic operation and command output functions of the hose filling system. All the cards of the PLC (Programmable Logic Controller) system are integrated in the cabinet. The control loop of ERS is composed of cards that meet SIL2 requirements.

Combined with Figure 2, the bunkering system is equipped with two sets of VSD for each type of ERS, which are installed close to the bunkering station to detect the distance between the bunkering ship and the receiving ship in the connected state. The two sets of VSD for the hydraulic ERS are located on the port and starboard sides of the ship respectively, and the two sets of VSD for the pneumatic ERS are also located on the port and starboard sides of the ship respectively.

The VSD supporting the hydraulic ERS includes the following parts:

-First ESD0 (pre-alarm) proximity switch;

-First ESD1 (level 1 alarm) proximity switch;

- Two first ESD2 (secondary alarm) proximity switches.

The VSD for pneumatic ERS includes the following parts:

- Second ESD1 proximity switch;

- Two second ESD2 proximity switches.

The system is equipped with two sets of hydraulic pipeline connection plates, which are located on the port and starboard sides of the ship near the filling station. Each set of connection plates contains three hydraulic pipe connection ports, which are used to connect the hydraulic oil to the three sets of hydraulic ERS at the filling station. Each connection port is equipped with a proximity switch that monitors the connection status, which is used to determine the side of the ship to which the current hydraulic ERS is connected. When the control cabinet reads that the three connection status proximity switch signals of the port hydraulic pipeline connection plate are all in the connection state, it is determined that the hydraulic ERS is currently installed at the port filling station; when the three proximity switch signals of the starboard hydraulic pipeline connection plate are all in the connection state, it is determined that the hydraulic ERS is currently installed at the starboard filling station.

The system is equipped with two sets of nitrogen pipeline connection plates, located on the port and starboard sides of the ship near the filling station. Each connection plate contains three high-pressure nitrogen connection ports, which are used to connect high-pressure nitrogen to the three pneumatic ERS at the filling station. Each nitrogen connection port is equipped with a proximity switch to monitor the connection status, which is used to determine the side of the current pneumatic ERS connection, just like the hydraulic pipeline connection plate.

The refueling system is equipped with three manual operation boxes for manually triggering the ERC disengagement action. One manual operation box is installed in the cargo control room, and the other two manual operation boxes are installed near the two refueling stations. The manual operation box contains the following parts:

-ESD2 emergency release trigger button;

- Reset button;

-ESD1 indicator light;

-ESD2 indicator light.

In addition to the above components, the manual operation box installed in the cargo control room also contains the following components:

-System operation indicator light;

-Buzzer with light, used to issue ESD0, ESD1, ESD2 sound and light alarms.

Two sound and light alarms are installed near the two filling stations respectively, and are used to issue ESD0 (pre-alarm), ESD1 (first level alarm), and ESD2 (second level alarm) sound and light alarms.

Management functions of hydraulic station:

1) Motor selection:

The two hydraulic motors cannot run at the same time. An interlock mechanism is set for the control contactors of the two motors to prevent the two motors from running at the same time.

The two motors start in turn, and the hydraulic station always starts the standby motor from the last operation. This mechanism prevents the standby motor from being idle for a long time and improves the reliability of the standby motor. In addition, when the main motor still does not start after a certain period of time (2-5 seconds) after the motor start command is issued, the standby motor starts automatically, and the control cabinet communication interface sends the motor fault status information to the customer system.

When the motor runs continuously, the main motor is rotated at fixed intervals.

2) Initial conditions for motor starting:

The motor can be started only when the following conditions are met at the same time:

-The motor has stopped;

-No fault feedback from motor circuit breaker and starter;

-No hydraulic oil low level alarm;

-The oil tank temperature is higher than the low temperature setting value T1 (-10℃ in this example).

The motor starts when any of the following conditions are met:

- The operator presses the motor start button of the hydraulic station;

-The system enters the ready state;

-The system enters ESD1 state;

-The system enters ESD2 state.

3) The conditions for the motor to stop are:

- In the non-ready state, the operator presses the motor stop button of the hydraulic station;

-The system enters a non-ready state;

-Low oil level alarm occurs;

- Motor circuit breaker, starter feedback motor fault.

4) Management of main pump:

The main pump provides the hydraulic power required for ERC action and accumulator charging. When the main pump solenoid valve is energized, the main pump outputs the pressure oil from the hydraulic motor. The main pump solenoid valve is energized under the following conditions:

-In the ready state, the pressure of the hydraulic station accumulator is lower than the low pressure setting value;

-The system enters ESD1 state;

-The system enters ESD2 state.

The conditions for the main pump solenoid valve to lose power are:

-The system enters a non-ready state;

- In the non-ESD state, the pressure of the hydraulic station accumulator increases to the high pressure setting value for t1 minute (1 minute in this example);

- In the non-ESD state, the pressure of the hydraulic station accumulator is lower than the low pressure setting value, the main pump has been running continuously for t2 minutes (t2>t1, in this case, t2=5 minutes), and the accumulator pressure has not reached the high pressure setting value;

-System ESD1 and ESD2 status reset.

5) Auxiliary pump management:

The auxiliary pump provides the hydraulic power required for hot oil circulation. When the auxiliary pump unloading solenoid valve loses power, the auxiliary pump outputs the pressure oil from the hydraulic motor; when the auxiliary pump unloading solenoid valve is energized, the auxiliary pump is unloaded and does not output pressure oil.

The conditions for the auxiliary pump unloading solenoid valve to be energized are: the system enters the ESD1 state; the system enters the ESD2 state.

The condition for the auxiliary pump unloading solenoid valve to lose power is: the system ESD1 and ESD2 status are reset.

6) Hydraulic oil heater:

The hydraulic oil heater is used to directly heat the hydraulic oil in the tank.

The power-on condition is: in the ready state, the oil tank temperature is lower than T2 (T2>T1, 30℃ in this example).

The power failure condition is: in the ready state, the oil tank temperature is higher than T3 (T3>T2, 45°C in this example); the system enters the non-ready state.

7) Hot oil circulation:

When the system is in the ready state and not in the ESD1 or ESD2 state, the hot oil circulation is maintained in the ERC hydraulic pipeline. When the system enters the ready state, the hot oil circulation solenoid valve is energized; when the system enters the ESD1/ESD2 state, the hot oil circulation solenoid valve is de-energized;

The conditions for the hot oil circulation solenoid valve to be energized are: the system enters the ready state; in the ready state, the ESD1 and ESD2 states are reset.

The conditions for the hot oil circulation solenoid valve to lose power are: - the system enters the ESD1 state; the system enters the ESD2 state; the system enters the non-ready state.

8) High-pressure nitrogen station management:

(1) When the pressure of the instrument air nitrogen tank (PT1) is less than P1 (45 bar in this example), the system sends an alarm signal of "instrument air nitrogen tank low pressure" to the customer system through the serial communication interface.

(2) When the pressure of the power nitrogen tank (PT2) is less than P2 (145 bar in this example), the system sends a "power nitrogen tank pressure low" alarm signal to the customer system through the serial communication interface.

(3) When the instrument air pressure (PT3) is less than P3 (5 bar in this example), the system sends an "instrument air pressure low" alarm signal to the customer system through the serial communication interface.

(4) When the instrument air pressure (PT3) is greater than P4 (P4>P3, 7 bar in this example), the system sends an "instrument air pressure high" alarm signal to the customer system through the serial communication interface.

(5) When the ERC pipeline pressure (PT4) is less than P5 (1.5 bar in this example), the system sends an "ERC pipeline leakage" alarm signal to the customer system through the serial communication interface.

9) Ready signal (Ready For Transfer):

The filling system sends two ready signals to the customer system through the serial communication interface, indicating that the hydraulic ERS system and the pneumatic ERS system are ready and have the conditions to carry out filling operations.

The ready signal and the valve position interlock of the ERS safety valve improve the reliability of the ready signal. Manually operated ERS safety valves are respectively configured before the ERC oil outlet of the hydraulic station and the ERC gas outlet of the high-pressure nitrogen station. When the safety valve is closed, the power pipeline of the disengagement actuator is blocked and cannot be disengaged. When the safety valve is opened, the power pipeline outlet of the disengagement actuator is unblocked, and emergency disengagement can be achieved when the ESD2 trigger signal appears. Safety proximity switch sensors are installed near the two safety valves to reflect the valve position status of the safety valve. When the sensor reflects that the safety valve is closed, the system cannot output the ready signal. When the sensor reflects that the safety valve is open, the system may output the ready signal. The operating procedures of the filling system will clearly require that the customer system shall not start the filling operation before receiving the ready signal of the filling system. Such procedures ensure that the ERS safety valve of the corresponding filling system is in the open state before the customer starts filling, effectively reducing the risk of ERS failure caused by human factors and improving the reliability of the system.

In addition, the system logically interlocks the hydraulic and pneumatic ready signals to ensure that the two cannot be in the ready state at the same time. When an emergency separation occurs, the system only outputs the separation action solenoid valve action signal corresponding to the bunkering equipment currently in the ready state, and does not output the corresponding solenoid valve action of the bunkering equipment in the non-ready state. This is an important basis for the compatible operation of the two bunkering equipment on a bunkering ship.

(1) “Ready For Transfer 1” indicates that the hydraulic ERS system is ready for operation. This signal is “1” when the following conditions are met at the same time.

-The ERS safety valve of the hydraulic station is in the open position;

-Hydraulic system has no fault alarm;

-The ERS safety valve of the high-pressure nitrogen station is in the closed position;

- The hydraulic line connection panel on either side detects the connection in place signal.

(2) “Ready For Transfer 2” indicates that the pneumatic ERS system is ready. This signal is “1” when the following conditions are met at the same time.

-The ERS safety valve of the high-pressure nitrogen station is in the open position;

-High-pressure nitrogen station has no fault alarm;

-The ERS safety valve of the hydraulic station is in the closed position;

- The nitrogen pipeline connection panel on either side detects the connection signal.

10) Power pipeline connection plate:

Both types of filling equipment are equipped with two power pipeline connection plates, which are fixed near the port and starboard filling stations respectively. The ERS of each filling equipment can be easily replaced and installed on the port and starboard sides.

Each ERS is equipped with a hydraulic or nitrogen connection hose. When the connection hose is connected to the fixed connection port of the power pipeline connection plate, the safety proximity switch sensor installed on the connection plate will be triggered. There are three connection ports on each mounting plate, that is, there are three safety proximity switch sensors.

Through the sensor signal on the connection board, the system can determine the location of the filling station (port or starboard) to which the two filling equipment are currently connected. This signal will serve as an important basis for selecting the VSD signal during the filling operation.

11) VSD (Vessel Distance Monitoring Device):

There are 4 sets of VSD in the system, 2 sets are matched with hydraulic filling equipment, fixedly installed at the port and starboard filling stations; 2 sets are matched with pneumatic filling equipment, also fixedly installed at the port and starboard filling stations. The distribution of VSD on the ship is shown in the attached figure.

During bunkering operations, the system selects one of the four sets of VSD data to monitor the distance to the ship in real time. The selection method is listed in the table below:

12) VSD alarm:

A proximity switch is installed in the ship distance monitoring device. When the distance between the bunkering ship and the receiving ship drifts outside the working envelope, the proximity switch will send out an alarm signal.

When the VSD detects that the ship-to-ship distance drifts to a value greater than the pre-alarm distance setting value, it determines that the hose system is in the pre-alarm position, and the filling control system sends out a slow sound and light alarm and feeds back the ESD0 alarm signal to the ESD system.

When the VSD detects that the ship-to-ship distance drifts to a value greater than the first-level alarm distance setting value, it determines that the hose system is in the first-level alarm position, and the filling control system sends out a rapid sound and light alarm and feeds back the ESD1 alarm signal to the ESD system.

When the VSD detects that the ship-to-ship distance drifts to a value greater than the secondary alarm distance setting value, it determines that the hose system is in the secondary alarm position, and the bunkering control system triggers the ERC disengagement action, issues a continuous sound and light alarm, and feeds back the ESD2 alarm signal to the ESD system.

In order to improve the safety of the secondary alarm, the hose system is judged to be in the secondary alarm position when any of the following conditions are met:

-The VSD level 1 alarm proximity switch is actuated, and one VSD level 2 alarm proximity switch is actuated;

-The two secondary alarm proximity switches of the VSD operate simultaneously.

More specifically:

ESD0 (pre-alarm) process:

The trigger condition of ESD0 is: VSD1 or VSD2 detects that the ship-to-ship distance drifts to a value greater than the pre-alarm distance setting value.

After ESD0 occurs, the filling control system sends out a slow sound and light alarm (0.5s on, 1.5s off), and the ESD0 dry contact signal (normally closed) fed back from the filling system to the ESD system changes from 1 to 0.

When the ship-to-ship distance returns from the pre-alarm position to the normal working position, the ESD0 feedback signal changes from 0 to 1, and the sound and light alarm disappears.

ESD1 (level 1 alarm) process:

In the ready state, ESD1 is triggered when any of the following conditions are met:

(1) The VSD detects that the ship-to-ship distance drifts to a value greater than the first-level alarm distance setting value;

(2) The ship's ESD system issues the ESD1 command.

After ESD1 occurs, if the hydraulic ERS system is in the ready state, the filling system triggers the following actions:

(1) The main pump solenoid valve is energized, and the accumulator solenoid valve is energized;

(2) The auxiliary pump unloading solenoid valve is energized, the hot oil circulation solenoid valve is de-energized, and the hot oil circulation stops;

(3) The ESD1 dry contact signal (normally closed) fed back from the filling system to the ESD system changes from 1 to 0;

(4) Issue a rapid sound and light alarm (0.5s on, 0.5s off).

After ESD1 occurs, if the pneumatic ERS system is in the ready state, the filling system triggers the following actions:

(1) The ESD1 dry contact signal (normally closed) fed back from the filling system to the ESD system changes from 1 to 0;

(2) Send out a rapid sound and light alarm (0.5s on, 0.5s off).

When the ship-to-ship distance returns from ESD1 position to ESD0 or normal working position, the ESD1 feedback signal changes from 0 to 1.

When all the conditions that trigger the ESD1 state of the filling system disappear, the ESD1 state can be reset through the reset button of the filling station. After the ESD1 state is reset, the sound and light alarm disappears, the main pump solenoid valve loses power, the accumulator solenoid valve loses power, the auxiliary pump unloading solenoid valve loses power, the hot oil circulation solenoid valve is energized, and the ERC hydraulic oil circuit resumes hot oil circulation.

ESD2 (secondary alarm) process:

In the ready state, ESD2 is triggered when any of the following conditions are met:

(1) The VSD detects that the ship-to-ship distance drifts to a value greater than the secondary alarm distance setting value;

(2) The operator presses the ESD2 button of any manual operation box (filling station 1, filling station 2, cargo control room);

(3) The ship's ESD system issues an ESD2 command.

After ESD2 occurs, if the hydraulic ERS system is in the ready state, the filling system triggers the following actions:

(1) The main pump solenoid valve is energized, and the accumulator solenoid valve is energized;

(2) The auxiliary pump unloading solenoid valve is energized, and the hot oil circulation solenoid valve is de-energized;

(3) The ESD2 dry contact signal (normally closed) fed back from the filling system to the ESD system changes from 1 to 0;

(4) Issue a continuous sound and light alarm;

(5) When ESD2 is manually triggered, timer T4 is started (waiting for the ship's ESD system to execute ESD1 action, taking 5 seconds). After T4 is completed, the next action is entered; this timer is not started when VSD triggers ESD2;

(6) The disengagement solenoid valve is energized, the ERC disengagement cylinder is actuated, and all ERCs connected to the hydraulic station are disengaged.

After ESD2 occurs, if the pneumatic ERS system is in the ready state, the filling system triggers the following actions:

(1) The ESD2 dry contact signal (normally closed) fed back from the filling system to the ESD system changes from 1 to 0;

(2) Issue a continuous sound and light alarm;

(3) When ESD2 is manually triggered, timer T4 is started (waiting for the ship's ESD system to execute ESD1 action, 5 seconds in this example). After T4 is completed, the next action is entered; this timer is not started when VSD triggers ESD2;

(4) The disengagement solenoid valve is energized, the ERC disengagement cylinder is actuated, and all ERCs connected to the ERC nitrogen connection plate are disengaged.

When the ship-to-ship distance returns from the ESD2 position, the ESD2 feedback signal changes from 0 to 1.

When all the conditions that trigger the filling system ESD2 state disappear, the ESD2 state can be reset through the reset button of the filling station. After the ESD1 and ESD2 states are reset, the sound and light alarm disappears, the main pump solenoid valve loses power, the accumulator solenoid valve loses power, the auxiliary pump unloading solenoid valve loses power, the hot oil circulation solenoid valve is energized, and the ERC hydraulic oil circuit resumes hot oil circulation.

The resetting of the disengagement cylinder is completed by manual operation.

The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The electric control system of the marine filling equipment is characterized by comprising at least two emergency disengaging systems, at least two actuating power systems, at least two ship distance monitoring devices, at least two power pipeline connecting plates and a control cabinet; the electronic control system can be compatible with and control at least two filling devices on the same filling ship and respond to emergency detachment of the ship;

The actuating power systems are used for providing power for the emergency release systems and each actuating power system comprises a valve position sensor arranged at a power outlet safety valve, wherein the sensors are used for judging the filling state of each filling device, and the filling state is used for selecting an emergency release executing mechanism;

the power pipeline connecting plates comprise actuating pipeline connecting state sensors which are used for selecting a ship distance monitoring device;

The ship distance monitoring devices comprise distance monitoring sensors, and when the ship distance is detected to drift to be larger than a set value, the system triggers an alarm;

The emergency release system is controlled to release when the ship distance monitoring device triggers an emergency release alarm;

The control cabinet is arranged at the ship machinery place and integrates the electrical logic operation and instruction output functions of the hose filling system;

the actuating power system comprises a hydraulic station and a high-pressure nitrogen station;

the emergency release system comprises a hydraulic power driven emergency release system and a high-pressure nitrogen driven emergency release system, which are marked as hydraulic ERS and pneumatic ERS, are respectively powered by a hydraulic station and a high-pressure nitrogen station, and are respectively arranged at two filling stations at two sides of the ship; the electronic control system is provided with at least one set of emergency separation system, each emergency separation system is respectively provided with at least two sets of ship distance monitoring devices VSD, and the two sets of VSDs are respectively arranged on the port side and the starboard side of the ship and are used for detecting the distance between the filling ship and the injected ship in a connection state; the hydraulic ERS and the pneumatic ERS are respectively provided with a hydraulic connecting hose and a nitrogen connecting hose;

The electric control system is provided with at least two sets of hydraulic pipeline connecting plates which are respectively positioned at the port and starboard sides of the ship and close to the filling station, and at least two sets of nitrogen pipeline connecting plates which are respectively positioned at the port and starboard sides of the ship and close to the filling station; each set of hydraulic pipeline connecting plates comprises m sets of hydraulic ERS (error correction system) for connecting hydraulic oil to the filling station, wherein the number of the hydraulic pipeline connecting plates is the same as the number of the emergency release system sets m; each set of nitrogen pipeline connecting plates comprises m sets of pneumatic ERS for connecting high-pressure nitrogen to the filling station, wherein the number of the high-pressure nitrogen connecting ports is the same as the number of the emergency release system sets m; when the connecting hose is connected with the fixed connection port of the power pipeline connecting plate, a safety proximity switch sensor arranged on the connecting plate is triggered, and the system can judge whether the current position of a filling station connected with two types of filling equipment is port or starboard through a sensor signal on the connecting plate, and the signal is used as a basis for selecting a VSD signal during filling operation;

the hydraulic station comprises an oil tank, a main motor, a standby motor, a main pump, an auxiliary pump, a hydraulic oil heater, a disengaging electromagnetic valve, a hot oil circulation electromagnetic valve, an energy accumulator and a motor start-stop button;

the main motor and the standby motor are started in turn;

the energy accumulator is used for emergency separation and operation when the power fails;

the hydraulic oil heater is used for heating hydraulic oil in the oil tank;

The main pump is used for providing hydraulic power required by ERC action of the emergency disengaging system and charging of the energy accumulator, and the main pump outputs power when the electromagnetic valve of the main pump is electrified;

the auxiliary pump is used for providing hydraulic power required by hot oil circulation, and when the auxiliary pump unloading electromagnetic valve is powered off, the auxiliary pump outputs power; when the auxiliary pump unloading electromagnetic valve is powered on, the auxiliary pump is unloaded, and no pressure oil is output;

the disengaging electromagnetic valve is used for opening an ERC disengaging oil way;

the hot oil circulation electromagnetic valve is used for closing the ERC disengaging oil way and opening the ERC hot oil circulation oil way;

the electromagnetic valve of the energy accumulator is used for opening an oil way for providing power for the energy accumulator;

The main motor and the standby motor are provided with an interlocking mechanism, so that the two motors cannot operate at the same time; the two motors are started in turn, and the hydraulic station starts a standby motor in the last running; in addition, when a motor starting command is sent for a certain period of time, the main motor is not started, the standby motor is started automatically, and the control cabinet communication interface sends motor fault state information to the client system;

(1) The initial conditions for starting the main motor and the standby motor are as follows:

The motor can be started only when the following conditions are simultaneously met:

the motor has stopped;

the motor breaker and the starter have no fault feedback;

Alarming without hydraulic oil at low liquid level;

The temperature of the oil tank is higher than a low-temperature set value T1;

the motor starts when any one of the following conditions is satisfied:

The operator presses a motor start button of the hydraulic station;

the system enters a ready state; the ready state means that the hydraulic ERS is ready;

the system enters an ESD1 state;

The system enters an ESD2 state;

(2) Conditions for motor stop:

in a non-ready state, the operator presses a motor stop button of the hydraulic station;

the system enters a non-ready state;

a low oil level alarm occurs;

The motor breaker and the starter feed back motor faults;

(3) Management of a main pump:

the main pump solenoid valve has the following power supply conditions:

in the ready state, the pressure of the hydraulic station accumulator is lower than a low pressure set value;

the system enters an ESD1 state;

The system enters an ESD2 state;

the condition of main pump solenoid valve power failure is:

the system enters a non-ready state;

In the non-ESD state, the pressure of the energy accumulator is increased to a high-pressure set value for a period of time of full t 1;

In the non-ESD state, the pressure of the energy accumulator is lower than a low-pressure set value, the main pump is continuously operated for a period of time of full t2, and the pressure of the energy accumulator still does not reach above a high-pressure set value; said t2> t1;

resetting the states of the ESD1 and the ESD2 of the system;

(4) And (3) management of auxiliary pumps:

the condition of the auxiliary pump unloading electromagnetic valve is that: the system enters an ESD1 state; the system enters an ESD2 state;

the condition of power failure of the auxiliary pump unloading electromagnetic valve is as follows: resetting the states of the ESD1 and the ESD2 of the system;

(5) Hydraulic oil heater:

the electricity obtaining conditions are as follows: in the ready state, the temperature of the oil tank is lower than the set temperature T2, and T2 is more than T1;

the power failure condition is: in the ready state, the temperature of the oil tank is higher than the set temperature T3, and T3 is more than T2; the system enters a non-ready state;

(6) Hot oil circulation:

When the system is in a ready state and is not in an ESD1 state and an ESD2 state, the hot oil circulation is kept in the ERC hydraulic pipeline; when the system enters a ready state, the hot oil circulation electromagnetic valve is powered on; when the system enters an ESD1/ESD2 state, the hot oil circulation electromagnetic valve is powered off;

The conditions for powering the hot oil circulation electromagnetic valve are as follows: the system enters a ready state; in the ready state, the ESD1, ESD2 states are reset;

The condition of the hot oil circulation electromagnetic valve is that: the system enters an ESD1 state; the system enters an ESD2 state; the system enters a non-ready state;

The high-pressure nitrogen station comprises an instrument wind nitrogen tank, a power nitrogen tank, a first emergency disengaging electromagnetic valve SOV1, a second emergency disengaging electromagnetic valve SOV2, an instrument wind nitrogen tank pressure transmitter PT1, a power nitrogen tank pressure transmitter PT2, an instrument wind pressure transmitter PT3 and an ERC pipeline pressure transmitter PT4;

the first emergency disengaging electromagnetic valve SOV1 is used for opening an ERC disengaging gas circuit;

The second emergency disengaging electromagnetic valve SOV2 is used for opening an ERC disengaging gas path and is redundant with SOV 1;

the instrument wind nitrogen tank pressure transmitter PT1 is used for measuring the pressure of the instrument wind nitrogen tank;

the power nitrogen tank pressure transmitter PT2 is used for measuring the power nitrogen tank pressure;

The instrument wind pressure transmitter PT3 is used for measuring the instrument wind pressure;

the ERC pipeline pressure transmitter PT4 is used for measuring the PERC pipeline pressure;

the high-pressure nitrogen station is specifically managed as follows:

(1) When the pressure of the instrument air nitrogen tank is smaller than a set value P1, the system sends an alarm signal of low pressure of the instrument air nitrogen tank to the client system through a serial communication interface;

(2) When the pressure of the power nitrogen tank is smaller than a set value P2, the system sends an alarm signal of low pressure of the power nitrogen tank to a client system through a serial communication interface;

(3) When the instrument wind pressure is smaller than a set value P3, the system sends an alarm signal of low instrument wind pressure to the client system through a serial communication interface;

(4) When the instrument wind pressure is greater than a set value P4, the system sends an alarm signal of high instrument wind pressure to the client system through a serial communication interface; the P4> P3;

(5) When ERC pipeline pressure is smaller than set value P5, the system sends an ERC pipeline leakage alarm signal to the client system through the serial communication interface

2. A marine filling apparatus electrical control system as claimed in claim 1, wherein the system further comprises at least one manual operation box for manually triggering the emergency release action.

3. A marine filling apparatus electrical control system as claimed in claim 1, wherein the filling system sends two readiness signals to the client system via the serial communication interface, respectively indicating that the hydraulic ERS system and the pneumatic ERS system are ready;

the ready signal is interlocked with the valve position of the ERS safety valve;

The hydraulic and pneumatic ready signals are logically interlocked, so that the two signals cannot be in ready state at the same time, when emergency separation occurs, the system only outputs a separation action electromagnetic valve action signal corresponding to the filling equipment in the ready state at present, and does not output electromagnetic valve action corresponding to the filling equipment in the non-ready state;

(1) Ready signal "Ready For Transfer 1" indicates that the hydraulic ERS is ready; when the following conditions are simultaneously satisfied, the signal is "1";

The ERS safety valve of the hydraulic station is positioned at an open position;

the hydraulic system gives an alarm without faults;

the ERS safety valve of the high-pressure nitrogen station is positioned at a closed position;

The hydraulic line connection plate of either side detects a connection in place signal;

(2) Ready signal "Ready For Transfer 2" indicates that pneumatic ERS is ready; when the following conditions are simultaneously satisfied, the signal is "1";

The ERS safety valve of the high-pressure nitrogen station is positioned at an opening position;

The high-pressure nitrogen station gives an alarm without faults;

the ERS safety valve of the hydraulic station is positioned at a closed position;

The nitrogen line connection plate on either side detects a connection in place signal.

4. The marine filling apparatus electric control system according to claim 2, wherein the VSD associated with the hydraulic ERS comprises: the first ESD0 proximity switch, the first ESD1 proximity switch and the two first ESD2 proximity switches are used for detecting the position of the emergency release safety valve, generating a safety valve switching state, namely an ESD state, and specifically respectively generating an ESD0 state, namely a pre-alarm state, an ESD1 state, namely a primary alarm state and an ESD2 state, namely a secondary alarm state, with sequentially increased grades;

The VSD matched with the pneumatic ERS comprises: the second ESD1 proximity switch and the two second ESD2 proximity switches respectively generate an ESD1 state which is a primary alarm state and an ESD2 state which is a secondary alarm state;

The manual operation box includes: an ESD2 emergency release trigger button, a reset button, an ESD1 indicator lamp, an ESD2 indicator lamp, a system operation indicator lamp and a buzzer with lamps for giving out ESD0, ESD1 and ESD2 audible and visual alarms.

5. A marine filling apparatus electronic control system as claimed in claim 3, wherein during a filling operation, the system selects 1 set from at least 4 sets of VSDs for monitoring the marine distance in real time, the 4 sets of VSDs being respectively designated as VSD1 to VSD4; the specific selection modes are shown in the following table:

6. The electrical control system of a marine filling device according to claim 1, wherein when the VSD monitors that the ship-to-ship distance drifts to be greater than the pre-alarm distance set value, the hose system is judged to be at the pre-alarm position, and the filling control system sends out a slow audible and visual alarm to feed back an ESD0 pre-alarm signal;

When the VSD monitors that the ship distance drifts to be greater than a primary alarm distance set value, judging that the hose system is at a primary alarm position, and the filling control system sends out a quick audible and visual alarm to feed back an ESD1 primary alarm signal;

When the VSD monitors that the ship distance drifts to be greater than the set value of the secondary alarm distance, the hose system is judged to be in the secondary alarm position, the filling control system triggers the ERC to break away, continuous audible and visual alarm is sent, and an ESD2 secondary alarm signal is fed back.

7. A marine filling apparatus electronic control system as claimed in claim 6, wherein the hose system is determined to be in the secondary alarm position when any of the following conditions is met:

the first ESD1 is close to the switch action, and one first ESD2 is close to the switch action;

the two first ESD2 proximity switches act simultaneously;

Or:

A second ESD1 is close to the switch action, and a second ESD2 is close to the switch action;

the two second ESD2 proximity switches are operated simultaneously.