JPH08333015A - Cargo handling control system - Google Patents

Abstract

PURPOSE: To automate cargo handling work with high safety and efficiency by making a cargo handling control means on ground base side and a cargo handling control means on ship side receive and send control data through a communication line. CONSTITUTION: Cargo handling control means 6, 1 fitted respectively on ground base GR side and ship SP side receive and send control data each other between them through a communication line LN and cooperate with each other for cargo handling work. An obstruction detection means 3 fitted on ground base GR side and/or ship SP side monitors whether a controller is proper, or whether the cargo handling means 1, 6 operates properly, for example, from a change in the oil level in a tank or hatch, and detects a trouble which may be an obstruction in continuing cargo handling work. When occurrence of trouble(s) is detected, an emergency stop signal is outputted to the respective cargo handling control means 1, 6 from an emergency stop command means 4 for emergency stop of cargo handling work. It is thus possible to ensure safe cargo handling work.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cargo handling control system for ships such as LNG and tankers that transport oil.
More specifically, the present invention relates to a cargo handling control system capable of safely and efficiently carrying out cargo handling work for raising and lowering cargo handling goods between a land base and a tanker.

[0002]

2. Description of the Related Art Conventionally, in cargo handling work between a ship such as a tanker and an LNG base on land or a base such as an oil refinery, first, a landway and a ship are connected by a pipeline. The cargo operator monitors the tank level in the onshore base, the oil tank level in the tanker, etc. and exchanges information wirelessly with the land side and tanker side, while starting the pump based on past experience, and at a predetermined timing. The valves installed at various locations are operated to distribute oil and the like into tanks and oil tanks.

However, according to such a conventional example, there has been a problem that it requires many years of experience as a cargo handling operator and it takes a long working time. Therefore, in order to solve these problems, it has been proposed to carry out a cargo handling work using a computer (for example, the actual exploitation 59-18).
9109, JP-A-1-216200, etc.).

However, all of these proposals are conceptual and could not be put into practical use.

[0005]

SUMMARY OF THE INVENTION Here, the present invention enables a cargo handling work performed between a land base and a ship such as a tanker to be safely and efficiently performed using a computer. The purpose of the present invention is to provide a cargo handling control system.

[0006]

SUMMARY OF THE INVENTION The present invention which achieves the above object is a cargo handling control system for automatically carrying out cargo handling work for raising and lowering cargo handling goods between a land base and a ship. And a ship side respectively, and a cargo handling work control means for automatically carrying out a cargo handling work based on control data relating to raising and lowering of a cargo handling work, a cargo handling work control means on the land base side, and a cargo handling work control means on the ship side. And a communication line for connecting and receiving control data between them,
Fault detection means provided on the land base side and / or ship side for detecting an accident that interferes with continuing cargo handling work, and an emergency stop that outputs an emergency stop signal when a failure is detected by the fault detection means A cargo handling control system comprising: command means, wherein the cargo handling work control means on the land base side or the ship side receives the emergency stop signal from the emergency stop command means and performs an emergency stop process of the cargo handling work. .

[0007]

[Operation] The cargo handling work control means provided on the land base side and the ship side respectively exchange control data via the communication line, and both control means cooperate with each other to efficiently carry out the cargo handling work. To do. The obstacle detection means provided on the land base side and / or the ship side is, for example, whether the control equipment is normal from the change of the oil level in the tank or hatch or the change of the oil flow rate in each pipe, Whether the operation of the work control means is normal or the operation of the communication system including the communication line is normal is monitored to detect an accident that may be an obstacle to continuing the cargo handling work.

When the fault detecting means detects an occurrence of an accident that may be an obstacle to continuing the cargo handling work, an emergency stop signal is output to each cargo handling work control means or the like to perform the emergency stop processing of the cargo handling work. To do. This ensures safe cargo handling work.

[0009]

An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a structural conceptual diagram of a cargo handling control system according to the present invention. In the figure, SP is a ship side such as a tanker, and GR is a land base such as a refinery. Tankers can be roughly divided into those for domestic voyages and those for international voyages, but in particular, the tankers for coastal voyages have a large merit of automating the cargo handling work because the cargo is frequently raised and lowered.

In the ship side SP, reference numeral 1 is a block generally showing the cargo handling work control means, which is composed of a computer having a CRT and a keyboard. The cargo handling work control means 1 is an oil tank (hatch) provided on a ship.
The signal from the level sensor that detects the level of oil inside,
Input signals from a flow sensor that detects the flow rate of oil through each pipe, control pumps and valves to control loading and unloading (shipping) of oil, and link with land-side cargo handling control means. It is configured to be performed while taking.

Reference numeral 2 is a communication interface, and LN is a communication line connected to this communication interface. This communication line LN uses a communication line using an optical fiber in order to maintain safety and explosion-proof performance.
The control data regarding the raising and lowering of the cargo is exchanged between the ship and the ship SP in the form of an optical signal. CC
Is an optical connector for connecting to a communication line composed of an optical fiber extending from the land side, and the connecting work is performed after the ship SP has landed on the pier.

Reference numeral 3 is a failure detecting means provided in the vessel for detecting an accident which is an obstacle in continuing the cargo handling work. This failure detection means monitors, for example, changes in the level of oil in the tank or hatch, the flow rate of oil flowing through each pipe, etc., and changes these values within the range that can be predicted based on normal cargo handling work. Including the function to judge whether cargo handling work is performed normally, whether there is a failure in control equipment such as pumps and valves, whether the operation of cargo handling control means is normal, and communication lines It has functions such as normal operation of the communication system.

Here, as a function of whether the operation of the communication system is normal, for example, a check frame for communication system diagnosis is sent to the land-side cargo handling work control means 6 via the communication line LN at a constant cycle. By transmitting and determining the response frame from the cargo handling work control means 6 side, an operation check is made to see if the communication system including the communication line LN is operating normally.

Reference numeral 4 denotes an emergency stop command means for outputting an emergency stop signal when the failure detection means 3 detects a serious failure that may interfere with the continuous cargo handling work. The stop command signal is applied to the cargo handling work control means 1 and also transmitted to the land side cargo handling work control means 6. On the side of the land base GR, 5 is a communication interface to which the communication line LN is connected, and the land side cargo handling work control means 6 uses the communication interfaces 5, 5.
It is connected to the cargo handling work control means 1 mounted on the ship side via the communication line LN and the communication interface 2 on the ship SP side, and exchanges control data relating to the lifting and lowering of the cargo. In addition, when the signal form of the data handled by the ship side and the signal form of the data handled by the land side are different, a signal converter or the like for aligning the signal form shall be provided in the middle of the communication system.

As the control data exchanged between the ship side and the land side, there are reservation collation data transmitted prior to the cargo handling work, shipping start command data, and while oil is being sent from the land or the ship side (oil passage). (Middle) contains monitoring data exchanged on the land side and ship side, operation procedure confirmation data, cargo handling completion data, etc., and is necessary for collaborative cargo handling work between the land side and the ship side. . In addition to these control data, a check frame for checking the communication line by the fault detecting means 3 and a response frame thereof are transmitted.

The cargo handling work control means 1 and 6 provided on the land-side base and the ship side are arranged to control the cargo handling work in cooperation with each other while exchanging various control data via the communication line LN. I am doing it. That is, each cargo handling work control means automatically configures the optimum piping for shipping suitable products based on the shipping reservation information (this is called a lineup), and, for example, products sent from a refinery are selected. It is designed to perform control so as to guide the set amount to the specified hatch. As such cargo handling work control means, on the land side, existing equipment may be used.

The operation of the system thus configured will be described below. FIG. 2 is a flowchart showing an example of the operation. Here, it is assumed that cargo is loaded from the refinery to the ship (tanker) side. Prior to the cargo handling work, a pipe (not shown) and a communication line LN are connected between the ship and the land base. These connections shall be designed so that the ship will not be separated even if it is slightly shaken by waves or wind.

First, the vessel side performs a communication start operation to confirm that normal communication can be performed between the land side and the vessel side (step 1). Here, if it is confirmed that the normal communication can be performed, thereafter, the communication system check function in the failure detection means 3 is activated at a constant cycle, and the check whether the operation of the communication system is normal is continued. It will be performed (step 2).

When the communication line LN operates normally, the cargo handling work control means 1 on the ship side performs a reservation collation operation (step 3). This reservation collation operation is an operation of transmitting the data such as the type of cargo to be loaded on the ship SP side and the planned loading amount to the land side cargo handling work control means 6 and collating it with the shipping reservation data held on the land side. Land side cargo handling work control means 6
When the ship collation data is sent from the ship side, the ship collates with the shipping reservation data owned by the ship side and sends the determination result to the cargo handling work control means 1 on the ship side. If there is a difference in the reservation data between the two, either of the reservation data will be modified so that they match.

Then, as a preparation stage for loading oil, a lineup operation is performed (step 4). This operation is automatically configured on the side of the ship SP by selecting a valve or the like and opening an optimum piping path between the hatch and the piping path to which oil is supplied from the land side based on the shipping reservation data. . When the lineup operation is completed, the operation to start oiling is performed, and the tip valve provided at the tip of the in-ship piping connected to the piping from the land side is opened, and a signal indicating that preparation for the ship side is complete Is transmitted to the land side (step 5). At each stage of these operations, the CRT screen provided in the cargo handling work control means 1 can appropriately display the connection state between the piping path and each hatch, various messages, and the like.

When the cargo handling work control means 6 on the land side receives the notification of the completion of preparation from the ship side, it performs the lineup operation on the land side based on the shipping reservation data (step 6). Then, when the lineup operation is completed, the start of shipping is transmitted to the ship side. In addition, a pump or the like on the land side is activated to start oil supply, and at the same time, the shipping amount is controlled (step 7).
Here, the control of the shipping amount (corresponding to the flow velocity of oil) is maintained at a place where a predetermined flow velocity (initial velocity) is reached by gradually increasing the oil delivery flow velocity at the time of start-up. When the oil level reaches a certain point, the initial speed release command is output, and the control is performed to further increase the oil delivery flow rate and to operate at full speed. By such control, oil loading and unloading work can be efficiently performed while avoiding a dangerous increase in pressure in the pipeline.

During the passage of oil, various control data and messages relating to the shipping and receiving states on the land side and the ship side are exchanged between the two via a communication line LN, and these are handled by either side. The CRT screens provided in the work control means 1 and 6 can be appropriately monitored. The land-side cargo handling work control means 6 measures the shipping amount of the oil to be loaded from the land side, and when the set shipping amount is approached, the flow rate limitation of gradually decreasing the oil delivery flow velocity is performed. Carry out, and when the set value is reached, shipping is terminated.
When the shipping is completed, a signal to that effect is transmitted to the ship (step 8). Similar shipping work was performed for each type of oil, and when the loading and unloading work for all products was completed,
On the side of the ship, the communication end operation is performed, the communication line LN is disconnected, the pipeline is disconnected, etc., and the cargo handling work is completed (step 9).

The communication end operation includes, for example, an operation such as a consistency check of shipping data on the land side and the ship side and a data download operation. Also, the operation of checking whether or not the operation of the communication system is normal is completed. FIG.
[Fig. 6] is a flowchart showing an example of an operation performed by the failure detection means 3 provided on the ship side.

In this fault detection operation, each function operates after connecting the communication lines between the land side and the ship side and ending the communication start operation. Here, first, the function of the cargo handling control means is checked. This function check is performed based on whether the power supply voltage supplied to the cargo handling control means is normal, whether the watch dog timer attached to the CPU constituting the cargo handling control means has timed out, and the like.

Next, during the passage of oil, the operating functions of the control equipment and the control state of the cargo handling work are checked. This check
If it is assumed that normal cargo handling work is in progress by monitoring changes in the level of oil in the tank or hatch and the flow rate of oil flowing through each pipe, these values will be correct within the range assumed in advance. Whether there is a change, the correlation of each signal, etc., determines whether there is a failure in the control device such as the pump or valve, or whether the cargo handling work is being controlled normally. For example, if the flow rate of oil sent through the pipe shows a certain value but the value of the level signal from the hatch does not change over time, the level sensor etc. may be damaged. It will be judged that there is.

Further, the function check of the communication system is performed at regular intervals. In the function check of this communication system, for example, a communication frame to which a code for parity check is added is transmitted to the other party via the communication line LN, and the communication frame is returned again as a response frame and the contents are compared. A method such as doing this is taken. If any failure that makes it difficult to continue the cargo handling work is detected in each of these function checks, an emergency stop command is output from the emergency stop command means 4 to perform a predetermined emergency stop process. . This emergency stop process is a process of stopping the shipping pump and quickly closing the shipping control valve on the side of the onshore base.

Here, an example in which only one communication line LN is provided to connect the land base and the ship is shown, but a second communication line configured separately from this communication line is provided between the land base and the ship. When the communication line LN is broken and a failure occurs, the emergency stop command signal may be transmitted to the other party via the second communication line. Further, although the fault detection means 3 is shown in FIG. 1 as being provided only on the side of the ship SP, it may be provided on the side of land.

[0028]

As described in detail above, in the system according to the present invention, the cargo handling work control means on the land base side and the cargo handling work control means mounted on the ship side are connected to each other via a communication line. Since the cargo handling work is performed and controlled while exchanging control data between the two parties, efficient cargo handling work can be performed while ensuring safety.

[Brief description of drawings]

FIG. 1 is a structural conceptual diagram of a cargo handling control system according to the present invention.

FIG. 2 is a flowchart showing an example of operation.

FIG. 3 is a flowchart showing an example of an operation performed by a fault detecting means 3 provided on the ship side.

[Explanation of symbols] SP Ship (tanker) GR Land base 1,6 Cargo handling control means 2,5 Communication interface LN communication line CC Optical connector 3 Failure detection means 4 Emergency stop command means

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Sumio Uehara 3-1-1 Marunouchi, Chiyoda-ku, Tokyo Idemitsu Kosan Co., Ltd. (72) Shoichi Wada 2--21-46 Takanawa, Minato-ku, Tokyo Yokohama Oil Tank Ship Co., Ltd.

Claims (3)

[Claims] 1. A cargo handling control system for automatically carrying out cargo handling work for hoisting and lowering cargo work between a land base and a ship, which is provided on each of the land base and the ship side, and relates to hoisting and lowering of cargo work. Communication for exchanging control data between the cargo handling work control means for automatically performing cargo handling work based on control data, the cargo handling work control means on the land base side and the cargo handling work control means on the ship side A line, a fault detection unit that is installed on the land base side and / or the ship side to detect an accident that interferes with the continuation of cargo handling work, and an emergency stop signal is output when a fault is detected by the fault detection unit. The cargo handling operation control means on the side of the land base or the ship side receives the emergency stop signal from the emergency stop instruction means and performs the emergency stop processing of the cargo handling operation. Cargo handling control system, wherein the door. 2. The cargo handling control system according to claim 1, wherein the failure detection means includes a communication system failure detection function for checking whether or not the communication system including the communication line operates normally. 3. A second communication line configured separately from a communication line for transmitting and receiving control data is provided between the land base and the ship, and the second communication line is used to send the data from the emergency stop command means. An emergency stop signal is transmitted to the other party.
Cargo handling control system.