JP2006290446A - Disaster preventive system for tank - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disaster preventive system for tanks, which carries out disaster preventive actions quickly, adequately, and with good efficiency, on the plurality of tanks immediately after occurrence of an earthquake. <P>SOLUTION: The disaster preventive system 1 for the tanks is a disaster preventive system for a floating roof tank 200, which takes countermeasures against an earthquake, and formed of an earthquake monitoring means 130, a tank operating means 120, an anti-earthquake measure processing means 10, a display means 41, a fire extinguishing means 7, a monitor camera 4, a loudspeaker 5, and a communication means 6. According to the system, the anti-earthquake measure processing means 10 predicts damage of the tank by the earthquake, based on earthquake data, tank operational information, and tank structural information, and based on a result of analysis of the damage prediction, the display means 41, the fire extinguishing means 7, the monitor camera 4, the loudspeaker 5, the communication means 6, etc. are automatically controlled. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tank disaster prevention system, and more particularly to a disaster prevention system for an earthquake of a tank in which petroleum products such as crude oil, gasoline, naphtha, etc. are stored, and the earthquake countermeasure processing means includes earthquake data, tank operation information and tank Damage prediction based on structural information, and automatic or semi-automatic control of disaster prevention processing means based on the analysis result of this damage prediction, disaster prevention immediately after the occurrence of an earthquake for multiple tanks The present invention relates to a tank disaster prevention system that can perform processing and can prevent the occurrence of serious secondary damage even when primary damage occurs.

  In general, in a storage base having a large number of oil tanks, since preventive measures before an earthquake are important, various preventive measures are implemented. However, there are limits to preventive measures. For example, if an earthquake that is larger than the expected earthquake occurs, it will not be possible to stop the disaster without causing a primary damage. When such primary damage occurs, it is necessary to promptly carry out appropriate disaster prevention treatment immediately after the occurrence of the earthquake so that the primary damage does not spread into serious secondary damage.

  However, when a large earthquake actually occurs, it is extremely difficult to quickly carry out appropriate disaster prevention treatment immediately after the occurrence of the earthquake from various situations. Conventionally, when an earthquake of a predetermined magnitude or larger occurred, all tanks were inspected after the earthquake. This inspection was not an inspection according to the characteristics of the earthquake and tanks and the situation assumed at the time of the damage, but all tanks were inspected comprehensively, so it was not possible to respond efficiently. That is, it is necessary to infer from the large number of oil tanks the tanks that may have caused the primary damage and to preferentially check from such tanks.

(Conventional example)
As a technique for solving the above problem, for example, a paper “Establishment of real-time seismic damage evaluation system for oil storage tank” has been published (see Non-Patent Document 1).
FIG. 7 shows a schematic block diagram of a conventional earthquake damage evaluation system.
In the figure, the earthquake damage evaluation system 100 includes an earthquake monitoring means 130 and an earthquake wave analysis means 110.

<Earthquake monitoring means>
The earthquake monitoring unit 130 has a function of measuring the seismic wave and monitoring the presence / absence of an earthquake and the magnitude of the earthquake. This seismic monitoring means 130 is always operating, and when a measurement signal is input from a seismometer 131 provided at a site where a plurality of floating roof tanks 200 are constructed and an earthquake wave exceeding a predetermined value is detected, earthquake data Remember.

<Seismic wave analysis means>
The seismic wave analysis means 110 is a personal computer, and a seismic wave analysis program is installed.
The seismic wave analysis means 110 is activated by an operator when an earthquake occurs, and further, the seismic data is manually recorded in the storage means (hard disk) from the earthquake monitoring means 130, and the seismic wave analysis program is activated.
The seismic wave analysis means 110 performs the sloshing mode analysis and the bulging mode analysis of the floating roof tank 200 with the tank liquid level and the storage oil density being constant, and the structure of the floating roof 201 of each floating roof tank 200 is the same. It is possible to calculate circumferential stress, axial stress and retained horizontal proof stress, and to judge safety, warning and danger for these calculated values.

The above earthquake damage assessment system 100 focuses on damage information of tank facilities due to earthquake motion, and can estimate the internal earthquake distribution within the site and the safety during the earthquake for each oil tank in real time. Can support emergency activities. In addition, the above paper states that as a future issue, for example, it is possible to determine the priority of inspections and patrols after a large earthquake, and to respond immediately after an earthquake. Yes.
Pressure technology VOL. 40 NO. 3 138-149 pages issued 2002/05/25

  However, although the earthquake damage evaluation system 100 of the above paper is an excellent technology as an earthquake damage evaluation system, it is an earthquake damage evaluation system to the last. However, for those who are responsible for safety, there is a problem that the above evaluation system is not sufficient. In other words, when a large earthquake occurs, dozens of tanks are checked for the occurrence of primary damage, and in order not to spread the primary damage to secondary damage, There was a need for a disaster prevention system that can actually perform disaster prevention processing quickly, appropriately and efficiently.

  For example, when the oil tank is a floating roof type tank 200, the drain valve of the rainwater drain pipe of the floating roof 201 cannot be remotely closed. Therefore, if oil overflows on the floating roof 201 due to an earthquake, the oil may flow out of the tank. There was a problem of having sex. Similarly, other oil receiving and paying systems have a problem that they cannot be stopped quickly because they cannot be remotely controlled. Furthermore, when the rainwater drain pipe is damaged or the floating roof 201 is damaged and sinks, there is a problem that the oil outflow scale to the outside of the tank may increase due to a delay in the closing operation.

In addition, there is no automatic monitoring system using an on-site monitoring camera, and there is a problem that an operator has to perform on-site confirmation, which is inefficient and cannot perform on-site confirmation promptly.
In addition, because disaster prevention facilities (foam extinguishing means using foam, extinguishing means for damage status, means for broadcasting on the premises, etc.) are not automated, workers are unable to efficiently carry out disaster prevention treatment and respond to secondary damage that can be prevented. There was a problem that it could not be prevented because of the delay.

In addition, the earthquake damage evaluation system 100 has different occurrences of earthquake damage depending on the difference between the tank liquid level and the stored oil density, but the tank liquid level and the stored oil density are always constant, so the analysis accuracy is low. There was a problem.
Furthermore, although the occurrence of earthquake damage differs depending on the difference between the sloshing height and the structure of the floating roof 201, there is a problem that the damage cannot be predicted accurately because the evaluation is based only on the sloshing height.

  Also, the time immediately after the occurrence of an earthquake (for example, whether it is a few minutes or a few tens of minutes depends on the situation). If primary damage occurs, disaster prevention should not be extended to serious secondary damage. This is an extremely valuable time given to workers who perform processing. In other words, it is required that workers who are in a stockpiling base, etc., at the time of the earthquake occur promptly and appropriately perform appropriate disaster prevention treatment immediately after the occurrence of the earthquake, and prevent secondary damage that can be prevented reliably and safely. In order to conduct disaster prevention activities, the construction of an earthquake countermeasure processing system has been requested. In particular, since tank damage prediction during earthquakes and quick grasp of actual conditions cannot be performed, it has been required to speed up inspections and emergency operations.

  The present invention has been proposed to solve the above problem, and the earthquake countermeasure processing means performs damage prediction based on the earthquake data, tank operation information, and tank structure information, and the analysis result of this damage prediction. The purpose is to provide a tank disaster prevention system that enables quick, appropriate and efficient disaster prevention treatment immediately after an earthquake to multiple tanks by controlling disaster prevention treatment means automatically or semi-automatically based on To do.

In order to achieve the above object, the tank disaster prevention system of the present invention is a tank disaster prevention system for earthquakes, and measures earthquake measurement means for measuring seismic waves, reduces damage caused by earthquakes, and facilitates disaster prevention measures immediately after the occurrence of an earthquake. Disaster prevention processing means for performing and inputting earthquake data measured from the earthquake measuring means, based on the earthquake data, tank operation information and tank structure information, predicting damage due to the earthquake of the tank, Based on the analysis result of the damage prediction, the earthquake countermeasure processing means for controlling the disaster prevention processing means automatically or semi-automatically, and the analysis result of the damage prediction are input, and the inspection tank and the inspection location are set as guidance when the earthquake occurs. A display means for displaying is provided.
In this way, when an earthquake occurs, the earthquake countermeasure processing means can activate the disaster prevention processing means almost automatically based on the damage prediction of the tank. And disaster prevention processing immediately after the occurrence of an earthquake can be performed efficiently. Moreover, by performing disaster prevention processing immediately after the occurrence of an earthquake quickly, appropriately and efficiently, even if primary damage occurs, it is possible to prevent the occurrence of serious secondary damage.

In the tank disaster prevention system of the present invention, when the tank is a floating roof type tank, the earthquake countermeasure processing means analyzes the sloshing mode of the tank as the damage prediction.
If it does in this way, damage prediction of a floating roof type tank to a long period earthquake can be analyzed with sufficient accuracy.

In the tank disaster prevention system of the present invention, the disaster prevention processing means includes a remotely controllable closing means for closing the rainwater drain pipe of the floating roof type tank.
In this way, even if oil or other stored material overflows on the floating roof, it is possible to quickly and appropriately prevent the overflowed stored material from flowing out of the tank through the rainwater drain pipe. This can reduce the risk of secondary damage.

Moreover, the tank disaster prevention system of this invention is set as the structure in which the said disaster prevention process means includes the fire extinguishing means which spreads a foam fire extinguisher to the said tank.
If it does in this way, a foam fire extinguisher can be sprayed to the place where there was a fire, or the place which may have a fire, and the fire fighting activity or the disaster prevention activity for preventing a fire beforehand can be performed quickly and appropriately.

In the tank disaster prevention system according to the present invention, the disaster prevention processing means includes a closing means for closing the tank delivery valve.
If it does in this way, receipt / payment of the storage thing with respect to a tank can be prevented quickly and appropriately, and the danger that a secondary damage will occur can be reduced.

In the tank disaster prevention system of the present invention, the disaster prevention processing means includes a monitoring camera and an image analysis means for analyzing an image of the monitoring camera.
In this way, monitoring of the tank can be performed quickly and appropriately, and automatic monitoring can be performed, so that a large number of tanks can be monitored extremely efficiently. Moreover, since the actual situation can be grasped quickly and appropriately, the disaster prevention process can be performed more effectively.

In the tank disaster prevention system of the present invention, the earthquake countermeasure processing means includes a function of improving the prediction accuracy of the damage prediction by feedback.
In this way, the analysis accuracy of damage prediction can be improved, so that the performance of the system can be improved.

In the tank disaster prevention system of the present invention, the earthquake countermeasure processing means includes a communication function for communicating the inspection tank and the inspection location.
In this way, the operator can be informed of the tank and the inspection location that need to be inspected, so that the inspection operation can be performed efficiently.

In the tank disaster prevention system according to the present invention, the earthquake countermeasure processing means includes an automatic contact means for notifying a person concerned about the damage status of the tank.
In this way, liaison work can be automated immediately after an earthquake that requires a quick response, so that workers can concentrate on disaster prevention activities and develop more prompt disaster prevention activities. it can.

  As described above, according to the tank disaster prevention system of the present invention, the earthquake countermeasure processing means performs damage prediction based on the earthquake data, the tank operation information, and the tank structure information, and based on the analysis result of the damage prediction. By controlling the disaster prevention processing means almost automatically, it is possible to perform the disaster prevention processing immediately after the occurrence of the earthquake on a plurality of tanks quickly, appropriately and efficiently. In particular, effective utilization and efficient operation of personnel and materials and equipment can be achieved. Personnel such as normal workers can confirm the occurrence of primary damage to multiple tanks, and further, primary damage Even if this occurs, disaster prevention processing can be carried out promptly so as not to spread into serious secondary damage.

Hereinafter, a preferred embodiment of a tank disaster prevention system according to the present invention will be described with reference to the drawings.
FIG. 1: has shown the schematic block diagram of the tank disaster prevention system which concerns on one Embodiment of this invention.
In the figure, a tank disaster prevention system 1 is a disaster prevention system for a floating roof tank 200 against an earthquake, and includes an earthquake monitoring means 130, a tank operation means 120, an earthquake countermeasure processing means 10, a display means 41, a fire extinguishing means 7, and a monitoring camera. 4, the speaker 5 and the communication means 6 are provided.
In FIG. 1, the same components as those in FIG. 7 are denoted by the same reference numerals, and detailed description thereof is omitted. Moreover, a tank is not limited to the floating roof type tank 200, A tank other than a floating roof type may be sufficient. Further, only one floating roof tank 200 is shown for easy understanding.

<Earthquake countermeasure processing means>
The earthquake countermeasure processing means 10 is a personal computer equipped with a backup power source, and an earthquake countermeasure processing program including an earthquake wave analysis program is installed. The earthquake countermeasure processing means 10 is connected to the earthquake monitoring means 130, the tank operation means 120, the display means 41, the drain valve 3, the receiving valve 2, the pump 21, the fire extinguishing means 7, the monitoring camera 4 and the speaker 5. Further, the communication means 6 connected to the communication line 61 is built in.
The earthquake countermeasure processing means 10 is always activated, and inputs earthquake data output from the earthquake monitoring means 130 when the earthquake monitoring means 130 detects an earthquake wave of a predetermined value or more. In addition, tank operation information (for example, liquid level, stored oil density, etc.) and tank structure information (for example, structure of the floating roof 201, etc.) of each floating roof type tank 200 is input from the tank operation means 120 as needed. The latest tank operation information and tank structure information are recorded.

The earthquake countermeasure processing means 10 starts the recording of the earthquake data when the input earthquake data is equal to or greater than a value (necessary abbreviated as an activation setting value) that requires the earthquake data analysis. In addition, when the input earthquake data is less than or equal to the value for determining that the earthquake has ended (appropriately abbreviated as the earthquake end setting value), the recording of the earthquake data is terminated, and the seismic wave is based on the recorded earthquake data. By using an analysis program (a program in which the analysis accuracy is improved by several levels compared to the conventional example), earthquake data analysis (bulging mode analysis and sloshing mode analysis) is performed, and damage prediction is performed.
Next, bulging mode analysis, sloshing mode analysis, and damage prediction according to the present embodiment will be described with reference to the drawings.

"Bulging mode analysis"
FIG. 2: has shown schematic sectional drawing of the floating roof type tank for demonstrating the bulging mode analysis in the tank disaster prevention system which concerns on one Embodiment of this invention.
In this figure, when the floating roof tank 200 receives a horizontal seismic force, the side plate 202 in the seismic force direction is deformed outward, and a part of the bottom plate 203 is deformed upward, and vibrates in a bulging mode 301. To do.
The bulging mode analysis of this embodiment is based on the latest tank operation information input from the tank operation means 120 (for example, the liquid level and density of the stored oil 205), the generated stress in the side plate 202, the bottom plate 203 The generated stress and the necessary retained horizontal proof stress are calculated, and the analysis accuracy can be improved as compared with the conventional example.

  Further, the earthquake countermeasure processing means 10 is based on the calculated stress generated in the side plate 202 and tank structure information input from the tank operation means 120 (for example, the structures of the side plate 202 and the bottom plate 203) as damage prediction in the bulging mode 301. The presence or absence of damage due to the hoop stress of the side plate 202 and the buckling due to the compressive stress can be predicted. Further, based on the generated stress in the bottom plate 203 and tank structure information (for example, the structures of the side plate 202 and the bottom plate 203), it is possible to predict the presence or absence of damage or the like at the joint between the side plate 202 and the bottom plate 203.

"Sloshing mode analysis"
FIG. 3: has shown schematic sectional drawing of the floating roof type tank for demonstrating sloshing mode analysis in the tank disaster prevention system which concerns on one Embodiment of this invention.
In the figure, when the floating roof tank 200 receives a horizontal seismic force, the stored oil 205 swings, and the floating roof 201 vibrates in the sloshing mode 302 according to the liquid level of the swinging oil 205. To do.
The sloshing mode analysis of the present embodiment calculates the sloshing height based on the latest tank operation information (for example, the liquid level and density of the stored oil 205) input from the tank operation means 120. Analysis accuracy can be improved.

  The earthquake countermeasure processing means 10 also calculates the calculated sloshing height and tank structure information input from the tank operation means 120 (for example, the structures of the side plates 202, the tank upper equipment 204, and the floating roof 201, etc.) as damage prediction in the sloshing mode. ) To predict whether there is overflow, damage to the floating roof 201, damage due to collision between the floating roof 201 and the tank upper equipment 204, and damage at the joint between the tank upper equipment 204 and the side plate 202. Can do.

The earthquake countermeasure processing means 10 performs damage prediction by the bulging mode analysis and sloshing mode analysis for each floating roof type tank 200 and displays the analysis result of the damage prediction on the display means 41.
FIG. 4 shows a schematic diagram of a display screen that displays damage prediction in the present embodiment.
In the same figure, the display screen 11 is a damage prediction list displayed on the display means 41. The earthquake occurrence date and time, the measurement time of the earthquake and the acceleration value of the earthquake are displayed. Further, for each area of each crude oil tank, A tank number (for example, T-30305 etc.) and a damage prediction result are displayed. This damage prediction result is displayed separately for the bulging mode (B) damage prediction result and the sloshing mode (S) damage prediction result (rectangular area with [B] or “S” displayed), and no damage has occurred. Is predicted, the rectangular area displaying [B] or “S” is displayed in green.

Further, when it is predicted that a stress of, for example, 70% to 90% is applied to the damage occurrence value, a rectangular area displaying [B] or “S” is displayed in yellow. In this case, it indicates that a load larger than the first alarm set value (70% of the damage occurrence value) is applied, and there is a possibility that a slight deformation or the like has occurred, and it is necessary to check. Furthermore, when it is predicted that a stress exceeding 90%, for example, is applied to the damage occurrence value, a rectangular area displaying [B] or “S” is displayed in red. In this case, it indicates that a load larger than the second alarm set value (90% of the damage occurrence value) has been applied, there is a risk of actual damage, and it is necessary to check and deal with it immediately. If it does in this way, the priority order which should perform disaster prevention processing from which floating roof type tank 200 among several floating roof type tanks 200 can be determined easily.
The damage prediction display screen 11 can be easily changed to various display formats. For example, a numerical value for the damage occurrence value can be displayed on the floating roof tank 200 displayed in red. In this way, it is possible to easily determine the priority order for a plurality of red displays.

Moreover, the earthquake countermeasure processing means 10 can specifically instruct the operator of the earthquake countermeasure processing means 10 and the worker on site from the analysis result of the damage prediction, the inspection location of the floating roof type tank 200 to be inspected. .
FIG. 5 shows a schematic diagram of a display screen for displaying inspection locations in the present embodiment.
In the figure, the display screen 12 indicates which part of the tank needs to be inspected with respect to the floating roof tank 200 exceeding the first alarm set value (yellow) or the second alarm set value (red). This is the screen to be displayed. This display screen 12 displays the area and tank number at the top, further displays a perspective view of the tank appearance, and displays that the inspection location is A: West pontoon and B: East pontoon.
The earthquake countermeasure processing means 10 can display the display screen 12 on the display means 41 of the earthquake countermeasure processing means 10. Thereby, the operator of the earthquake countermeasure processing means 10 can communicate the inspection tank and the inspection location to the worker at the site by using the wireless communication device, the telephone, the speaker 5 installed at the site, and the like.

Here, it is preferable that the earthquake countermeasure processing means 10 is configured to have a communication function for communicating the inspection tank and the inspection location to the worker on site, and in this way, the floating roof that requires the worker to be inspected. Since the tank 200 and the inspection location can be directly communicated, the inspection work can be performed more efficiently.
In this embodiment, although not shown in the figure, a wireless LAN explosion-proof repeater is installed at the site, the earthquake countermeasure processing means 10 has a wireless LAN function, and a worker working at the site has a wireless LAN adapter attached. The personal digital assistant (PDA) or the like is possessed. In this way, since the earthquake countermeasure processing means 10 can automatically transmit the display screen 12 to the PDA, the worker on site can perform a quick inspection work according to the display screen 12.

  In addition, the earthquake countermeasure processing means 10 is configured to include, for example, a contact means 6 for notifying the person concerned of the predicted damage status of the tank shown in the display screen 11. Via 61, it is possible to automatically communicate with a predetermined party in the form of e-mail or fax. In this way, liaison work can be automated immediately after the occurrence of an earthquake that requires a quick response, allowing workers and operators to concentrate on disaster prevention activities accordingly, and deploying more prompt disaster prevention activities. can do.

Based on the analysis result of the damage prediction, the earthquake countermeasure processing means 10 reduces the damage caused by the earthquake, and the disaster prevention processing means (for example, remotely controllable rainwater drainage for smoothly performing the disaster prevention measures immediately after the occurrence of the earthquake). The drain valve 3, the receiving valve 2, the start / stop switch of the pump 21, the fire extinguishing means 7, the monitoring camera 4, the speaker 5 and the contact means 6) are controlled automatically or semi-automatically. Here, all the disaster prevention processing means are not fully automatic because, for example, it may be preferable to perform the disaster prevention processing after confirming the situation. If it does in this way, the disaster prevention process immediately after the occurrence of an earthquake can be performed quickly with a limited number of personnel.
Next, disaster prevention processing means included in this embodiment will be described.

<Drain valve>
The drainage valve 3 is a valve for draining rainwater that has fallen on the floating roof 201 of the floating roof type tank 200 to the outside of the tank, and is normally open. This drain valve 3 is a motor valve that can be remotely controlled by the earthquake countermeasure processing means 10. In this way, when the earthquake countermeasure processing means 10 determines that there is an overflow of the oil 205 on the floating roof 201 from the analysis result of the damage prediction, it outputs a control signal and automatically closes the drain valve 3. . Therefore, it is possible to automatically prevent the oil 205 overflowing the floating roof 201 from flowing out of the tank through the rainwater drain pipe. In the present embodiment, the drain valve 3 is controlled based on the analysis result of the damage prediction. However, the present invention is not limited to this. For example, when a large earthquake is detected, The drain valve 3 may be automatically closed.

<Payment valve>
The receiving valve 2 is a valve used when the floating roof tank 200 receives the oil 205 or discharges the oil 205 from the floating roof tank 200, and is normally in a closed state. The payment valve 2 is a motor valve that can be remotely controlled by the earthquake countermeasure processing means 10. In this way, when the receiving valve 2 is opened and oil 205 is being received and discharged by the pump 21 when an earthquake occurs, the earthquake countermeasure processing means 10 outputs a control signal and automatically closes the receiving valve 2. Further, the pump 21 is stopped. Thereby, it is possible to automatically prevent the oil 205 stored in the floating roof tank 200 and the oil 205 transferred by the pump 21 from flowing out of the tank or the pipe.

<Monitoring camera>
Although the monitoring camera 4 is for confirming the damage situation of the floating roof type tank 200, although not shown in figure, it is the image analysis means (usually installed in an instrument room) which analyzes the image of this monitoring camera 4. ). In this way, the floating roof tank 200 can be monitored quickly and accurately based on the analysis result of the damage prediction. In addition, the image analysis means can automatically monitor, for example, an abnormality such as a fire or oil 205 spill by automatically comparing the image immediately after the earthquake with the current image by binarization processing, for example. A large number of floating roof tanks 200 can be monitored efficiently.

<Fire extinguishing means>
The fire extinguishing means 7 can disperse the foam extinguishing agent to the floating roof type tank 200 by remote control. In this way, the foam is generated in a place where there is a risk of fire or fire based on the analysis result of the damage prediction. Extinguishing media can be sprayed. As a result, fire fighting activities or disaster prevention activities for preventing fires can be performed quickly and accurately.

Next, operation | movement of the tank disaster prevention system 1 of the said structure is demonstrated with reference to drawings.
FIG. 6a is a schematic flowchart for explaining the operation of the tank disaster prevention system according to the embodiment of the present invention.
In the figure, in the tank disaster prevention system 1, first, the earthquake monitoring means 130 constantly performs earthquake observation (step S1).
The tank operation means 120 constantly monitors the operation state of each floating roof type tank 200. For example, the liquid level height data of the oil 205 is input from the liquid level gauge 210 provided in the floating roof type tank 200. The state data of the pump 21 and the delivery valve 2 are input. The tank operation means 120 also stores tank structure information, and outputs the input tank structure information to the earthquake countermeasure processing means 10.
Further, the earthquake countermeasure processing means 10 is always activated, and inputs and stores the latest tank operation information and structure information from the tank operation means 120 and immediately receives an earthquake occurrence signal from the earthquake monitoring means 130. , Waiting in a state where disaster prevention processing can be performed.

  Next, when an earthquake occurs (step S2), the earthquake monitoring unit 130 records the measured seismic wave and outputs the measured seismic wave as earthquake data to the earthquake countermeasure processing unit 10.

Next, when the earthquake countermeasure processing means 10 receives the earthquake data from the earthquake monitoring means 130, the earthquake countermeasure processing means 10 determines whether or not the earthquake is greater than or equal to the activation setting value that activates the system (step S3). Return to the earthquake observation (step S1).
When the earthquake is equal to or greater than the activation set value, the earthquake countermeasure processing means 10 records the earthquake data from the earthquake monitoring means 130 (step S4).

  Although not shown, the earthquake countermeasure processing means 10 may be configured to urgently shut off the drainage valve (roof drain valve) 3 of the all-floating roof tank 200 when the earthquake is a large earthquake exceeding expectations. By doing so, it is possible to effectively prevent the problem that the oil 205 is discharged out of the tank while it is shaken by an earthquake. Similarly, when the earthquake is an unexpected great earthquake, the earthquake countermeasure processing means 10 may close the receiving valve 2 and stop the pump 21 urgently. It is possible to automatically prevent the stored oil 205 or the oil 205 transferred by the pump 21 from flowing out of the tank or the pipe.

  Next, the earthquake countermeasure processing means 10 determines whether or not the earthquake is equal to or less than the earthquake end set value (step S5), and if it exceeds the earthquake end set value (that is, if the earthquake has not ended), the earthquake Returning to the data recording (step S4), the earthquake data is continuously recorded. When the earthquake is less than or equal to the earthquake end set value, the earthquake countermeasure processing means 10 recognizes that the earthquake has ended (step S6), and the earthquake data based on the recorded earthquake data, the latest tank operation information and the tank structure information. Analysis is performed (step S7). This seismic data analysis consists of the above-mentioned bulging mode analysis, sloshing mode analysis and damage prediction.

Next, the earthquake countermeasure processing means 10 determines whether or not the analysis result of the damage prediction is larger than the first alarm set value (step S8), and the analysis result is the first alarm in all the floating roof tanks 200. When the value is less than or equal to the set value, the earthquake data and the analysis result (for example, the all green display screen 11) are displayed and stored (step S9), and then the earthquake observation (step S1) is returned.
Further, when the analysis result is larger than the first alarm set value, it is determined whether or not the damage prediction analysis result is larger than the second alarm set value (step S10), and when the analysis result is equal to or smaller than the second alarm set value. The first alarm is displayed in yellow (step S11), and then the process proceeds to step S9 to return to the earthquake observation (step S1).
Further, when the analysis result is larger than the second alarm set value, the second alarm is displayed in red (step S12), and then the process proceeds to step S9 to return to the earthquake observation (step S1).

Next, the earthquake countermeasure processing means 10 starts specific disaster prevention measures immediately after the occurrence of the earthquake through steps S11 and S12. First, the speaker 5 automatically broadcasts to the workers in the facility that the first alarm or the second alarm has been issued and that the disaster prevention activity is to be started (step S13). Thereby, the disaster prevention activity can be started by the worker who was performing daily work. For example, the person in charge of disaster prevention (or the person in charge of disaster prevention) enters the instrument room with the earthquake countermeasure processing means 10 and starts preparations for the entire command, and the worker in charge of inspection prepares for inspection work. Can do.
When the earthquake countermeasure processing means 10 outputs a control signal to sound generating means (not shown) such as a tape recorder, the sound generating means performs automatic broadcasting, so this processing is performed almost instantaneously without losing time. It can be performed.

  Subsequently, the earthquake countermeasure processing means 10 communicates that the first alarm or the second alarm has been issued to the related parties (in-house related department, disaster prevention personnel, etc.) from the communication means 6 via the communication line 61 and the disaster prevention activities. Is automatically informed of the start of the operation (step S14). It should be noted that when the first alarm is issued, only the disaster prevention personnel are contacted, and when the second alarm is issued, the internal related department and the disaster prevention personnel may be notified. Moreover, since the communication means 6 will transmit automatically, if a control signal is input from the earthquake countermeasure processing means 10, the earthquake countermeasure processing means 10 can perform this process almost instantaneously.

  Next, the earthquake countermeasure processing means 10 closes the drain valve (roof drain valve) 3 of the fully floating roof tank 200 (step S15), then closes the open receiving valve 2 and stops the pump 21 (step S15). S16). In this way, even if the oil 205 overflows on the floating roof 201, it is possible to quickly and appropriately prevent the overflowing oil 205 from flowing out of the tank through the rainwater drain pipe, The risk of secondary damage occurring can be reduced. In addition, it is possible to quickly and appropriately prevent the oil 205 from being transferred to the floating roof tank 200, and to reduce the risk of secondary damage. The earthquake countermeasure processing means 10 can perform the above-described processing only by outputting a control signal, and can perform this processing almost instantaneously.

  Next, although not shown, when the second alarm is issued, the earthquake countermeasure processing means 10 activates an air foam valve (not shown) and starts preparation for foam extinguishment in order to extinguish the foam. May be. Moreover, since the earthquake countermeasure processing means 10 can prepare for foam extinguishing only by outputting a control signal, it is possible to avoid a problem such as loss of time. That is, the processing from step S13 to step S16 can be performed by the earthquake countermeasure processing means 10 in less than a few seconds, so the speed of the tank disaster prevention system 1 is not impaired.

Next, the earthquake countermeasure processing means 10 outputs a control signal to the surveillance camera 4 and sequentially displays images on the display means 41 from the floating roof tank 200 having a high priority for inspection. The state of the formula tank 200 can be confirmed continuously (step S17).
Further, the earthquake countermeasure processing means 10 takes an image after the occurrence of the earthquake into the image analysis means, and this image and the latest image before the occurrence of the earthquake taken periodically (for example, at intervals of several minutes) are image analysis means. By comparing the two binarization processes, it is possible to automatically monitor the state of the floating roof type tank 200 (for example, an abnormality such as a fire or oil 205 spill). However, although this automatic monitoring can detect any abnormality, an operator who is under inspection is also detected as an abnormality. Therefore, an operator needs to check before performing specific processing (such as the start of fire extinguishing). That is, since the operator of the earthquake countermeasure processing means 10 only needs to pay attention to the floating roof tank 200 in which the image analysis means has detected an abnormality, it can monitor efficiently.

Next, the operator of the earthquake countermeasure processing means 10 determines whether or not a fire has occurred from the image displayed by the earthquake countermeasure processing means 10 (step S18), and controls the fire extinguishing means 7 if a fire has occurred. A signal is output and fire extinguishing is started (step S19). In addition, the earthquake countermeasure processing means 10 automatically broadcasts from the speaker 5 that a fire has occurred, and from the communication means 6 through the communication line 61, the related parties (fire department, police station, in-house related department, disaster prevention personnel, etc.) ) Automatically communicates that a fire has occurred (step S20).
If no fire has occurred, the process proceeds to step S20 to automatically communicate to the parties concerned (in-house related departments, disaster prevention personnel, etc.) that no fire has occurred (step S20).
Note that each monitoring camera 4 continues automatic monitoring of the state of a predetermined floating roof tank 200 (for example, an abnormality such as a fire or oil 205 spill).
Further, since the earthquake countermeasure processing means 10 can transmit the display screen 12 described above to the PDA of the worker at the site, the worker at the site can quickly, appropriately and efficiently inspect according to the display screen 12. It can be carried out.

  As described above, according to the tank disaster prevention system 1 according to the present embodiment, when an earthquake occurs, the earthquake countermeasure processing means 10 automatically performs the disaster prevention processing means based on the damage prediction of the floating roof type tank 200. Since it can be operated, the disaster prevention process immediately after the occurrence of the earthquake can be performed quickly, appropriately and efficiently on the plurality of floating roof tanks 200. Moreover, by performing disaster prevention processing immediately after the occurrence of an earthquake quickly, appropriately and efficiently, even if primary damage occurs, it is possible to prevent the occurrence of serious secondary damage.

The tank disaster prevention system of the present invention has been described with reference to the preferred embodiment. However, the tank disaster prevention system according to the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention. It goes without saying that implementation is possible.
For example, the earthquake countermeasure processing means 10 may be configured to have a function of improving the prediction accuracy of damage prediction by feedback. This function is not a function that operates during the disaster prevention activities immediately after the earthquake, but is for verifying the accuracy of damage prediction of the earthquake countermeasure processing means 10 after the disaster prevention activities are completed.
Next, this function will be described with reference to the drawings.

FIG. 6b shows a schematic flowchart for explaining the prediction accuracy improving function of the earthquake countermeasure processing means in this embodiment.
In the figure, the earthquake countermeasure processing means 10 records the liquid level data of the floating roof tank 200 when the earthquake is equal to or higher than the activation set value for starting the system (step S31), and then the analysis result and the liquid level data. Are compared (step S32), it is determined whether or not the difference is within the allowable range (step S33), and when the difference is out of the range, the parameter is corrected (step S35). In this way, by comparing the sloshing prediction and the actual measurement value, it is possible to optimize the prediction parameter and improve the prediction accuracy as needed, and to improve the analysis accuracy of the damage prediction, so that the performance of the system can be improved. .

  As described above, the tank disaster prevention system of the present invention is not limited to the tank disaster prevention system in a storage base or the like, and is effective for, for example, a plurality of tanks used in refineries and chemical factories. Can be applied.

1 shows a schematic block diagram of a tank disaster prevention system according to an embodiment of the present invention. The schematic sectional drawing of the floating roof type tank for demonstrating the bulging mode analysis in the tank disaster prevention system which concerns on one Embodiment of this invention is shown. The schematic sectional drawing of the floating roof type tank for demonstrating sloshing mode analysis in the tank disaster prevention system which concerns on one Embodiment of this invention is shown. The schematic of the display screen which displays the damage prediction in this embodiment is shown. The schematic of the display screen which displays the inspection location in this embodiment is shown. The schematic flowchart figure for demonstrating operation | movement of the tank disaster prevention system which concerns on one Embodiment of this invention is shown. The schematic flowchart figure for demonstrating the prediction accuracy improvement function of the earthquake countermeasure process means in this embodiment is shown. The schematic block diagram of the earthquake damage evaluation system concerning a prior art example is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tank disaster prevention system 2 Receipt valve 3 Drain valve 4 Monitoring camera 5 Speaker 6 Contact means 7 Fire extinguishing means 10 Earthquake countermeasure processing means 11 and 12 Display screen 21 Pump 41 Display means 61 Communication line 100 Earthquake damage evaluation system 110 Earthquake wave analysis means 120 Tank Driving means 130 Seismic monitoring means 131 Seismometer 200 Floating roof tank 201 Floating roof 202 Side plate 203 Bottom plate 204 Tank upper equipment 205 Petroleum 210 Liquid level gauge 301 Bulging mode 302 Sloshing mode

Claims (9)

A tank disaster prevention system for earthquakes,
An earthquake measuring means for measuring seismic waves;
Disaster reduction measures to reduce the damage caused by the earthquake and to smoothly implement disaster prevention measures immediately after the earthquake,
Inputs earthquake data measured from the earthquake measuring means, performs damage prediction due to the earthquake of the tank based on the earthquake data, tank operation information and tank structure information, and based on the analysis result of the damage prediction An earthquake countermeasure processing means for controlling the disaster prevention processing means automatically or semi-automatically;
A tank disaster prevention system comprising: a display means for inputting an analysis result of the damage prediction and displaying an inspection tank and an inspection location as guidance when an earthquake occurs.   2. The tank disaster prevention system according to claim 1, wherein, when the tank is a floating roof type tank, the earthquake countermeasure processing means performs a sloshing mode analysis of the tank as the damage prediction.   The tank disaster prevention system according to claim 2, wherein the disaster prevention processing means includes a remotely controllable closing means for closing a rainwater drain pipe of the floating roof type tank.   The tank disaster prevention system according to any one of claims 1 to 3, wherein the disaster prevention processing means includes fire extinguishing means for spraying a foam extinguishing agent to the tank.   The tank disaster prevention system according to any one of claims 1 to 4, wherein the disaster prevention processing means includes a closing means that closes a delivery valve of the tank.   The tank disaster prevention system according to any one of claims 1 to 5, wherein the disaster prevention processing means includes a monitoring camera and an image analysis means for analyzing an image of the monitoring camera.   The tank disaster prevention system according to any one of claims 1 to 6, wherein the earthquake countermeasure processing means includes a function of improving the prediction accuracy of the damage prediction by feedback.   The tank disaster prevention system according to any one of claims 1 to 7, wherein the earthquake countermeasure processing means includes a communication function for communicating the inspection tank and an inspection location.   The tank disaster prevention system according to any one of claims 1 to 8, wherein the earthquake countermeasure processing means includes an automatic contact means for notifying a person concerned about a damage situation of the tank.

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