KR20240055997A - A valve monitoring system to prevent liquid cargo loading and unloading accidents - Google Patents

Abstract

The valves related to the loading and unloading of liquid cargo are implemented to enable remote control, and the opening and closing status of the valve is monitored and linked with the DCS (Damage Control System) to prevent loading and unloading ship accidents. This relates to a valve monitoring system to prevent liquid cargo loading and unloading accidents. It detects the opening and closing status of the liquid cargo loading and unloading valve installed at the opening of the liquid cargo loading and unloading and the abnormal state of the opening and closing detection sensor, and provides valve opening and closing status information and opening and closing. A valve monitoring device that transmits abnormal state information of the detection sensor to the accident response system, a valve remote control system that remotely controls the opening and closing of the valve, based on the valve opening and closing state information obtained from the valve monitoring device and the abnormal state information of the opening and closing detection sensor. It determines whether the loading/unloading valve is normally open/closed and whether the opening/closing detection sensor is in a normal state. As a result of the determination, if abnormal opening/closing of the loading/unloading valve or an abnormal state of the opening/closing detection sensor is detected, an alarm event is sent to the valve monitoring device. It includes an accident response system to prevent loading and unloading accidents.

Description

A valve monitoring system to prevent liquid cargo loading and unloading accidents}

The present invention relates to a valve monitoring system to prevent accidents in loading and unloading liquid cargo. In particular, the valves involved in loading and unloading of liquid cargo are implemented to enable remote control, and the open and closed status of the valve is monitored to provide an accident response system (DCS); This is about a valve monitoring system to prevent loading and unloading accidents of liquid cargo by linking it with the Damage Control System to prevent ship accidents during loading and unloading.

Generally, liquid cargo such as crude oil and liquefied natural gas (LNG) is transported via ships.

For the loading and unloading of liquid cargo from LNG ships, there is a cargo tank, pump tower, two discharge pipes for loading and unloading of LNG, one filling pipe with a bent upper part, Additionally, a number of valves such as emergency pipes that can be used in emergencies are implemented.

On ships transporting liquid cargo, due to abnormalities in the opening and closing of valves installed in the loading and unloading system of cargo, different types of cargo loaded in multiple cargo holds are simultaneously unloaded on land through one piping system or transferred to the cargo hold in which the cargo is loaded. Accidents are occurring where cargo is being sent and contaminated.

This mainly occurs in valves that are manually operated by crew members, and methods such as continuous supplementation of verification procedures have been introduced to reduce such accidents, but there are limits to minimizing human error.

As is well known, ships transporting liquid cargo are equipped with multiple cargo holds to store liquid, and a complex piping system for loading liquid cargo into cargo holds from land or unloading cargo onto land. In addition, a number of valves are installed in the piping system for the purpose of controlling or blocking the flow of fluid from multiple cargo holds to onshore loading and unloading facilities, or controlling the direction of the flow.

In order to proceed with the loading and unloading of a ship, according to a pre-established plan, the crew manually adjusts the opening degree of each manually operated valve, reports whether it is fully opened or closed to the cargo control room, and the person in charge confirms it, and then remotely. Valves that can be operated are operated remotely from the cargo control room.

This operating method relies 100% on information provided by crew members on site. In other words, there may be cases where the crew member does not completely open or close the valve or accidentally operates the wrong valve, or the rope is simply wrapped (closed) or hung (open) as shown in the photos of Figures 1a and 1b, causing the position to change. This is a structure that can easily lead to an accident due to incorrect information being transmitted to the cargo control room due to a change in information, incorrect indication due to a crew member's mistake, or an error that occurs during the information transmission process. This is a structure that is completely dependent on the crew's skill or experience. It's a situation.

Therefore, technology is required to accurately and automatically monitor the status of valves related to the loading and unloading of liquid cargo on ships and link this with the accident response system (DCS) to prevent ship accidents related to loading and unloading of liquid cargo in advance. It is becoming.

Republic of Korea registered patent 10-1334344 (registered on November 22, 2013) (liquid cargo leak prevention device and vessel equipped with the same) Republic of Korea registered utility model 20-0413790 (registered on April 5, 2006) (cargo tank pump tower for liquid cargo unloading of LNG ships)

Therefore, the present invention was proposed to solve liquid cargo ship accidents that occur due to crew misoperation or information transmission errors in manually operated valves on general liquid cargo transport ships as described above, and the valves related to the loading and unloading of liquid cargo A valve to prevent accidents in loading and unloading liquid cargo by enabling remote control and monitoring the opening and closing status of the valve and linking it with the DCS (Damage Control System) to prevent loading/unloading ship accidents. The purpose is to provide a monitoring system.

In order to achieve the above-mentioned purpose, the “valve monitoring system for preventing liquid cargo loading accidents” according to the present invention,

Valve monitoring detects the open/closed status of the liquid cargo loading/unloading valve installed at the opening of the liquid cargo loading/unloading and abnormal status of the opening/closing detection sensor, and transmits the valve opening/closing status information and abnormal status information of the opening/closing detection sensor to the accident response system. Device;

A valve remote control system that remotely controls the opening and closing of the valve in communication with the valve monitoring device; and

Based on the valve opening/closing status information obtained from the valve monitoring device and the abnormal status information of the opening/closing detection sensor, it is determined whether the loading/unloading valve is normally open/closed and whether the opening/closing detection sensor is in a normal state, and as a result of the determination, the loading/unloading valve It is characterized by including an accident response system that transmits an alarm event to the valve monitoring device to prevent loading and unloading accidents when abnormal opening or closing or an abnormal state of the opening and closing sensor is detected.

In the above, data is interfaced between the accident response system and the valve monitoring device through Ethernet communication or RS-422 communication.

In the above, the valve monitoring device is,

A valve open/closed state detection sensor that detects the open/closed state of the liquid cargo loading/unloading valve;

An intrinsically safe circuit (I.S. Barrier Module) that adjusts the voltage of the valve open/closed state detection sensor and interfaces the detection signal of the valve open/closed state detection sensor;

a process module that receives a valve open/closed state detection signal interfaced through the intrinsically safe circuit, processes it into a valve open/closed state detection signal and an abnormal state determination signal from a valve open/closed state detection sensor, and transmits the resulting information to the accident response system; and

It is characterized in that it includes a monitoring terminal that generates a valve opening/closing error alarm in response to an alarm event for a valve opening/closing error transmitted from the accident response system in conjunction with the processor module.

In the above, the valve monitoring device further includes a communication interface module that interfaces data with the monitoring terminal, interfaces valve-related data with the accident response system, or interfaces valve control commands transmitted from the valve remote control system. Do it as

In the above, the valve monitoring device includes a first power supply unit (PSU) that converts input commercial power and supplies it to the monitoring terminal;

a second power supply unit (PSU) that converts the input commercial power and supplies it to the process module;

It is characterized in that it further includes a solenoid that automatically controls the opening and closing of the liquid cargo loading and unloading valve according to the control of the process module.

In the above, the accident response system is,

Connects to the valve monitoring device through communication and compares the valve open/closed state detection signal transmitted from the valve monitoring device with the valve control information transmitted from the valve remote control system to determine whether the valve open/closed state is normal, and determines whether the valve open/closed state is normal. It is characterized by comparing the detection sensor state detection signal and the reference signal to determine whether there is an abnormality in the valve open/closed state detection sensor.

According to the present invention, the valve related to the loading and unloading of liquid cargo is implemented to enable remote control, and the opening and closing status of the valve is monitored and linked with the DCS (Damage Control System) to quickly send an alarm in case of valve opening and closing error. This has the effect of preventing loading/unloading vessel accidents.

1A and 1B are illustrations of a method for checking whether a manually operated valve is opened or closed on a conventional liquid cargo loading and unloading vessel;
Figure 2 is a configuration diagram of a valve monitoring system for preventing liquid cargo loading accidents according to the present invention;
Figure 3 is a conceptual diagram of the valve operation process in the valve monitoring system for preventing liquid cargo loading accidents according to the present invention;
Figure 4 is an illustration of the valve control concept of the valve monitoring system for preventing liquid cargo loading accidents according to the present invention.

Hereinafter, a valve monitoring system for preventing liquid cargo loading accidents according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

The terms or words used in the present invention described below should not be construed as limited to their usual or dictionary meanings, and the inventor may appropriately define the concept of the term in order to explain his/her invention in the best way. It must be interpreted with meaning and concept consistent with the technical idea of the present invention based on the principle that it can be done.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are only preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, and therefore various equivalents and It should be understood that variations may exist.

Figure 2 is a configuration diagram of a valve monitoring system for preventing liquid cargo loading and unloading accidents according to the present invention, and Figure 3 is a conceptual diagram of the valve operation process in the valve monitoring system for preventing liquid cargo loading and unloading accidents according to the present invention.

The "valve monitoring system for preventing liquid cargo loading and unloading accidents" according to the present invention detects the open/closed state of the liquid cargo loading/unloading valve installed at the opening of the liquid cargo loading/unloading and the abnormal state of the opening/closing detection sensor, and opens/closes the valve. It is equipped with a valve monitoring device (100) that transmits status information and abnormal state information of the opening/closing detection sensor to the accident response system (DCS) (300).

The valve monitoring device 100 detects the open/closed state of the liquid cargo loading/unloading valves 101, 102, and the voltage of the valve open/closed state detection sensors 103, 104. An intrinsically safe circuit (I.S. Barrier Module) (105, 106) that controls and interfaces the detection signal of the valve open/closed state detection sensors (103, 104), and the valve open/closed state interfaced through the intrinsically safe circuit (105, 106). A process module 107 that receives a detection signal, processes it into a valve open/closed state detection signal and an abnormal state judgment signal of the valve open/closed state detection sensor, and transmits it to the accident response system 300, in conjunction with the processor module 107. It may include a monitoring terminal 108 that generates a valve opening/closing error alarm in response to an alarm event for a valve opening/closing error transmitted from the accident response system 300.

In the present invention, only two liquid cargo loading and unloading valves are shown, but it is not limited to this, and it is understood by those with ordinary knowledge in the field that they work the same on ships equipped with a larger number of liquid cargo loading and unloading valves. This will become self-evident when you grow up.

The valve monitoring device 100 interfaces data with the monitoring terminal 108, interfaces valve-related data with the accident response system 300, or receives valve control commands transmitted from the valve remote control system 200. A communication interface module 109 that interfaces, a first power supply unit (PSU) 110 that converts the input commercial power and supplies it to the monitoring terminal 108, and the process module 107 that converts the input commercial power. ) and a solenoid 112 that automatically controls the opening and closing of the liquid cargo loading and unloading valve according to the control of the process module 107. .

The valve remote control system 200 functions to remotely control the opening and closing of the valve by linking with the valve monitoring device 100 through Ethernet communication or RS-422 communication.

The accident response system 300 determines whether the loading and unloading valves are normally opened and closed and whether the opening and closing detection sensor is in a normal state based on the valve open/closed state information and the abnormal state information of the open/closed detection sensor obtained from the valve monitoring device 100. And, as a result of the above determination, if abnormal opening/closing of the loading/unloading valve or an abnormal state of the opening/closing detection sensor is detected, an alarm event is transmitted to the valve monitoring device 108 to prevent loading/unloading accidents.

Data can be interfaced between the accident response system 300 and the valve monitoring device 100 through Ethernet communication or RS-422 communication.

This accident response system 300 is connected to the valve monitoring device 100 through communication and receives a valve open/closed state detection signal transmitted from the valve monitoring device 100 and valve control information transmitted from the valve remote control system 200. By comparing, it is possible to determine whether the valve open/closed state is normal, and by comparing the valve open/closed state detection sensor state detection signal with the reference signal, it is possible to determine whether the valve open/closed state detection sensor is abnormal.

The operation of the valve monitoring system for preventing liquid cargo loading accidents according to the present invention configured as described above will be described in detail as follows.

First, when commercial power (for example, AC 220V) for operation is supplied to the valve monitoring device 100, the first power supply unit 110 converts the input commercial power to an appropriate voltage (for example, DC 24V). It is converted into and supplied to the monitoring terminal (108). The monitoring terminal 108 is activated when a driving voltage is supplied and performs monitoring and alarm functions.

In addition, the second power supply unit 111 converts the input commercial power into an appropriate voltage (for example, DC 24V) and supplies it to the process module 107. The process module 107 is activated when a driving voltage is supplied and performs communication functions, monitoring operations, and valve opening/closing control operations.

For example, when a valve opening/closing control command for loading and unloading of liquid cargo is transmitted from the valve remote control system 200 to the valve monitoring device 100 through Ethernet or RS-422 communication, the process module of the valve monitoring device 100 (107) receives this and controls the liquid cargo loading/unloading valves (101, 102) in response to the control command.

A solenoid 112 is provided to automatically control the opening and closing of the liquid cargo loading and unloading valves 101 and 102, and the process module 107 controls the solenoid 112 in response to an opening and closing control command to open and close the liquid cargo. Automatically controls the opening and closing of cargo loading and unloading valves. Since automatically controlling the opening and closing of a valve using a solenoid is a generally known technology, detailed description thereof will be omitted.

After controlling the liquid cargo loading and unloading valves 101 and 102 in response to the control command, the valve monitoring device 100 monitors the open/closed state of the liquid cargo loading and unloading valve installed at the opening of the liquid cargo loading and unloading. and detects an abnormal state of the opening/closing detection sensor, and transmits the detected valve opening/closing state information and abnormal state information of the opening/closing detection sensor to the accident response system (DCS) (300).

That is, the intrinsically safe circuit (I.S Barrier Module) 105, 106 receives DC 24V supplied from the second power supply unit 111, converts it into an appropriate voltage, and detects the valve open/closed state sensors 103, 104. ) supplies the driving voltage to the The voltage and current control function of the intrinsically safe circuit (I.S. Barrier Module) 105, 106 can reduce the cause of ignition and ensure the safety of sensor operation in areas where hazardous substances such as gas are installed.

The valve open/closed state detection sensors (103, 104) detect the open/closed state of the liquid cargo loading/unloading valves (101, 102) and transmit this to the process module (107) through the intrinsically safe circuits (105, 106).

The process module 107 receives the received valve open/closed state detection signal, processes the received valve open/closed state detection signal into an abnormal state determination signal of the valve open/closed state detection sensor, and processes the received valve open/closed state detection signal into an abnormal state determination signal through the communication interface module 109. It is transmitted to the accident response system (300).

Here, the method of determining the abnormality of the valve open/closed state detection sensor using the valve open/closed state detection signal is: If the valve open/closed state detection signal does not occur or the detection signal is very weak, it can be judged as an abnormality of the valve open/closed state detection sensor. there is.

The accident response system 300 determines whether the loading and unloading valves are normally opened and closed and whether the opening and closing detection sensor is in a normal state based on the valve opening/closing status information and the abnormal status information of the opening/closing detection sensor obtained from the valve monitoring device 100. Judge.

That is, by connecting to the valve monitoring device 100 through communication, the valve open/closed state detection signal transmitted from the valve monitoring device 100 is compared with the valve control information transmitted from the valve remote control system 200 to determine the valve open/closed state. It is possible to determine whether the valve open/closed state detection sensor is normal, and whether the valve open/closed state detection sensor is abnormal by comparing the state detection signal of the valve open/closed state detection sensor with a reference signal.

As a result of determining the abnormality of the liquid cargo loading/unloading valve and valve opening/closing state detection sensor, if an opening/closing error in the liquid cargo loading/unloading valve occurs, or an abnormality in the valve opening/closing state detection sensor is detected, a valve opening/closing error alarm or An abnormality alarm is generated by the valve open/closed state detection sensor and transmitted to the valve monitoring device (100).

The communication interface module 109 of the valve monitoring device 100 transmits the received alarm information to the process module 107, and the process module 107 transmits the received alarm information to the monitoring terminal 108.

The monitoring terminal 108 receives an alarm event from the process module 107 and visually displays it on the screen to indicate which valve opening/closing error or which valve opening/closing state detection sensor is abnormal, and simultaneously generates an alarm. This allows the manager (or worker) to recognize valve opening/closing errors or abnormalities in the valve opening/closing state detection sensor in real time.

When an alarm occurs, the manager (or worker) quickly takes follow-up action to prevent accidents due to errors in loading and unloading liquid cargo.

Here, the process module 107 receives the alarm event from the accident response system 300, analyzes it, and automatically corrects the opening/closing of the liquid cargo loading/unloading valve if there is an error in the opening/closing of the liquid cargo loading/unloading valve, or automatically corrects the opening/closing of the liquid cargo loading/unloading valve. By closing the loading and unloading valves, accidents due to errors in loading and unloading liquid cargo can be prevented.

This provides the effect of preventing loading and unloading accidents of liquid cargo in real time even when the worker is not present on site after the alarm occurs.

According to the present invention described above, the valve related to the loading and unloading of liquid cargo is implemented to enable remote control, and the opening and closing status of the valve is monitored and linked with the accident response system (DCS; Damage Control System) to quickly detect valve opening and closing errors. By generating an alarm, loading and unloading vessel accidents can be prevented in advance.

Although the invention made by the present inventor has been described in detail according to the above embodiments, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the invention, as is known in the art. It is self-evident to those who have.

100: Valve monitoring device
101, 102: Liquid cargo loading and unloading valve
103, 104: Valve open/closed state detection sensor
105, 106: Intrinsically safe circuit
107: Process module
108: Monitoring terminal
109: Communication interface module
110, 111: Power supply unit
112: solenoid
200: Valve remote control system
300: Accident response system

Claims (6)

Valve monitoring detects the open/closed status of the liquid cargo loading/unloading valve installed at the opening of the liquid cargo loading/unloading and abnormal status of the opening/closing detection sensor, and transmits the valve opening/closing status information and abnormal status information of the opening/closing detection sensor to the accident response system. Device;
A valve remote control system that remotely controls the opening and closing of the valve in communication with the valve monitoring device; and
Based on the valve opening/closing status information obtained from the valve monitoring device and the abnormal status information of the opening/closing detection sensor, it is determined whether the loading/unloading valve is normally open/closed and whether the opening/closing detection sensor is in a normal state, and as a result of the determination, the loading/unloading valve Valve monitoring to prevent loading and unloading accidents of liquid cargo, characterized in that it includes an accident response system that transmits an alarm event to the valve monitoring device when abnormal opening and closing or an abnormal state of the opening and closing detection sensor is detected to prevent loading and unloading accidents. system.
In claim 1, data is interfaced between the accident response system and the valve monitoring device through Ethernet communication or RS-422 communication, and Ethernet communication or RS-422 communication is also performed between the valve remote control system and the valve monitoring device. A valve monitoring system for preventing liquid cargo loading and unloading accidents, characterized by interfacing data through a data interface.
In claim 1, the valve monitoring device,
A valve open/closed state detection sensor that detects the open/closed state of the liquid cargo loading/unloading valve;
An intrinsically safe circuit (IS Barrier Module) that adjusts the voltage of the valve open/closed state detection sensor and interfaces the detection signal of the valve open/closed state detection sensor;
a process module that receives a valve open/closed state detection signal interfaced through the intrinsically safe circuit, processes it into a valve open/closed state detection signal and an abnormal state determination signal from a valve open/closed state detection sensor, and transmits the resulting information to the accident response system; and
A valve monitoring system for preventing liquid cargo loading and unloading accidents, comprising a monitoring terminal that generates a valve opening/closing error alarm in response to an alarm event for a valve opening/closing error transmitted from the accident response system in conjunction with the processor module.
In claim 3, the valve monitoring device further includes a communication interface module that interfaces data with the monitoring terminal, interfaces valve-related data with the accident response system, or interfaces valve control commands transmitted from the valve remote control system. A valve monitoring system for preventing accidents in loading and unloading liquid cargo.
In claim 3, the valve monitoring device,
A first power supply unit (PSU) that converts input commercial power and supplies it to the monitoring terminal;
a second power supply unit (PSU) that converts the input commercial power and supplies it to the process module;
A valve monitoring system for preventing liquid cargo loading and unloading accidents, further comprising a solenoid that automatically controls the opening and closing of the liquid cargo loading and unloading valve according to the control of the process module.
In claim 1, the accident response system,
Connects to the valve monitoring device through communication and compares the valve open/closed state detection signal transmitted from the valve monitoring device with the valve control information transmitted from the valve remote control system to determine whether the valve open/closed state is normal, and determines whether the valve open/closed state is normal. A valve monitoring system for preventing liquid cargo loading and unloading accidents, characterized in that it determines whether there is an abnormality in the valve open/closed state detection sensor by comparing the sensor state detection signal and the reference signal.

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