KR100642999B1 - Managing system for underground tank - Google Patents

Abstract

The present invention is to provide an underground tank management system that can be monitored at all times in the place where the abnormality of the underground tank at a distance.

To this end, the present invention receives the signal detected by the underground tank detection sensor 20 and the underground tank detection sensor 20 to detect the abnormality and earthquake occurrence related to the oil leakage of the underground tank body 30 to determine whether there is an abnormality. The overflow control valve 19 for unloading in which opening / closing is controlled by the control apparatus 10 which judges collectively, the indicator 18 which displays the determination result by the control apparatus 10, and the control apparatus 11 is controlled. And detecting oil leakage and earthquake by the underground tank detection sensor 20, and determining the abnormality from the signal received from the underground tank detection sensor 20 in the control device 11 to the display 18. It is configured to control the opening and closing of the overflow prevention valve 19 by displaying.

Underground Tank Management System

Description

Management system for underground tank

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the whole structure of the underground tank apparatus of a gas station of the Example of this invention.

2 is a block diagram illustrating the configuration of an underground tank management system according to an embodiment of the present invention.

※ Explanation of codes for main parts of drawing

1: underground tank device 2: site

10: underground tank management system 11: control device

12: temperature sensor 13: underground tank liquid level detection sensor

14: underground tank oil leak sensor 15: leak liquid detection sensor

16: oil level meter 17: vibration sensing sensor

18: indicator 19: overflow prevention valve

20: control device 30: underground tank body

31: Lubrication device 32: Manhole fit

33: oil supply pipe 34: oil supply pipe

35: horizontal drawing pipe 36: oil feed pit

37: step 38: vent pipe

The present invention relates to an underground tank management system capable of collectively managing an underground tank for storing fuel oil such as gasoline embedded in the ground of a gas station site.

In general, in gasoline fueling stations, a plurality of underground tanks formed as cylindrical sealed containers are buried, and fuel oils such as gasoline, case, kerosene, etc. are individually stored in these underground tanks and refueled by an oil supply system installed on the ground. However, when cracks occurred in underground tanks and pipes connected to the oil supply system from the underground tanks, there was a risk that a highly flammable fuel oil might cause a fire, or a spill of fuel oil into the sewerage, causing environmental pollution. The present applicant has proposed, for example, a liquid level detection device for a double tank in which a lower end communicates with a liquid enclosed in a space of a double tank, and a transparent spiral tube having an upper end side in an inverted cone shape (for example, a patent). See Document 1).

As another method, the applicant has proposed a leak oil detector using a float settled in oil and a float floated in water (see, for example, Patent Document 2.). In addition, the present applicant puts a rotation indicator provided with a balance weight on the upper end side of the gas detector buried near the underground tank, and installs a string of material that melts with oil attached to the tension weight in the gas detector tube, thereby cutting the string. Proposed a technique for the leakage tank detection device of the underground tank which outputs the electrical signal of the reed switch which is turned on by the inversion of the rotation indicator to the notification device by connecting the wire to the tension weight to invert the rotation indicator against the weight of the balance weight. (For example, refer patent document 3.).

   [Patent Document 1] Patent application publication No. Hei 4-22800 (2 ~ 3 pages, Figures 1 to 3)

   [Patent Document 2] Patent No. 3485063 (Patents 2 to 3, Figs. 1 to 6)

   [Patent Document 3] Patent No. 3074351 (Patents 2 to 3, FIGS. 1 to 3)

Conventional double tank liquid level detector, leak oil detector and underground tank leak oil detector are individually separated from underground tank cracks, ground oil in the manhole pit above the underground tank or ground around the underground tank. The leaking fuel oil could be detected individually. In the past, however, the relationship between various reasons in the case of leakage oil often depended on the judge's experience without judging its causal relationship in the system to determine the reliability of the leakage oil. In addition, when visually judged, monitoring work became complicated, and it was not always possible to monitor the abnormality of underground tanks at all times in remote places such as offices.

The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide an underground tank management system for a gas station, which can collectively monitor the abnormality of the underground tank in a distant place.

In order to achieve the above object, in the invention described in claim 1, an abnormality related to oil leakage of the underground tank main body and underground tank detection sensors for detecting an earthquake occurrence, and the signal detected by the underground tank detection sensors are abnormal. It is characterized in that it is provided with a control device that collectively determines whether or not, an indicator for displaying the determination result by the control device, and an overflow prevention valve for unloading, in which opening and closing is controlled by the control device. Underground tank detection sensors detect oil leakage and earthquake, and the control device determines whether abnormality is received from signals received from underground tank detection sensors, and displays them on the indicator to control the opening and closing of the overflow prevention valve. The underground tank can be monitored at all times in a distant place.

In the invention as set forth in claim 2, the underground tank detection sensor includes a liquid level gauge for detecting an oil level stored in the underground tank body, a temperature sensor for detecting an oil temperature, and a liquid level of the liquid enclosed in the underground tank main body having a double wall structure. Underground tank liquid level detection sensor to detect, Underground tank oil leakage sensor to detect the leakage of oil leaking into the ground near the main body of the underground tank, Leak detection sensor to detect the leakage liquid in the manhole pit of the underground tank body and earthquake occurrence It is characterized by having a sensing (vibration detection) sensor to detect the. This enables the underground tank detection sensors to collectively detect the occurrence of oil leakage and earthquakes based on various reasons.

In the invention according to claim 3, the control device transmits a signal for closing the overflow prevention valve of the unloading when receiving the upper limit signal of the oil level from the oil level gauge or when receiving the signal of the earthquake generation from the vibration sensing sensor. It is characterized by. This not only prevents the overflow of the fluid during normal unloading, but also prevents the danger by stopping the unloading during an earthquake.

Hereinafter will be described in detail by one embodiment showing the present invention.

1 and 2 are views illustrating an underground tank management system according to an embodiment of the present invention, in which FIG. 1 is a diagram illustrating an overall configuration of an underground tank apparatus of a gas station, and FIG. 2 is a block illustrating a configuration of an underground tank management system. It is also.

As shown in FIG. 1, in the underground tank apparatus 1, the underground tank main body 30 for embedding the fluid of any of gasoline, diesel, kerosene, etc. is buried in the underground of the site 2 of a gas station, and the site 2 In (), the oil supply device 31 is installed upright.

The upper side of the basement tank body 30 is formed of concrete on the upper surface of the site 2, and the basement tank body 30 is provided with an oil supply pipe 33 having a lower end communicating therein. The upper end side of the oil lubrication pipe 33 is introduced into a manhole pit 33 on the upper part of the underground tank body 30 and is provided with an overflow prevention valve 19 to which oil lubrication hoses, which are unloaded from the tank lorry, are connected to the ground. It is in communication. An underground tank oil leakage sensor 14 for detecting oil leakage is provided in the ground near the basement tank body 30. In addition, the underground tank body 30 is provided with an oil supply pipe 34 in which the lower end side communicates with the inside, and the upper end side of the oil supply pipe 34 is in the manhole pit 32 and communicates with the horizontal drawing pipe 35. have.

The other end side of the horizontal drawing pipe 35 is introduced into the oil feed pit 36 formed at the lower portion of the oil supply device 31, and is led to the upper portion again so as to communicate with oil supply mechanisms such as a pump of the oil supply device 31.

In the manhole pit 32 at the upper part of the underground tank main body 30, the underground tank liquid level detection sensor 13 which detects the abnormality of the liquid level of the underground tank main body 30 used as a double tank is arrange | positioned. In another manhole pit 32, an elongated stem 37 is produced from the top to the bottom of the basement tank body 30 at the bottom, and the stem 37 has a temperature sensor 12 for detecting the temperature of the fluid. At the upper end thereof, there is provided a oil level gauge 16 by magnetostriction or the like for detecting the oil level of the underground tank body 30. In addition, the leakage liquid detecting sensor 15 is disposed in each of the manhole pit 32 and 32 and the oil feed pit 36. In the vicinity of the overflow prevention valve 19, the lower end side communicates with the upper space in the underground tank body 30, and the upper end side is provided with the vent pipe 38 opened in the upper space of the site 2. As shown in FIG. The underground tank management system 10 according to the embodiment of the present invention which collectively manages abnormalities such as oil leakage or earthquake occurrence due to cracking of the underground tank main body 30 in an office away from the underground tank main body 30. The control device 11 serving as a computer device constituting the control device 11, the vibration sensing sensor 17 for detecting the shaking of the earthquake, and the indicator 18 for displaying the data processing result by the control device 20 are arranged.

The detection signal by the oil level gauge 16, the temperature sensor 12, the underground tank liquid level detection sensor 13, the underground tank oil leakage sensor 14, the leak liquid detection sensor 15 and the sensing sensor 17 is controlled. The signal of the result connected to (11) and processed by the control device 11 is transmitted to the indicator 18 for display, and is transmitted to the overflow prevention valve 19 so that opening and closing is controlled.

As shown in the block diagram of FIG. 2, the underground tank management system 10 of the present invention controls signals from the underground tank detection sensors 20 for detecting the occurrence of abnormalities or earthquakes related to the underground tank main body 30. Received by the device 1, the control device 11 in accordance with a predetermined determined order to determine whether or not abnormality and display the result on the indicator 18, and the overflow prevention valve 19 The opening and closing is controlled to prevent the overflow of the fluid during unloading and to ensure the safety during an earthquake. The underground tank detection sensor 20 is the oil level gauge 16, the temperature sensor 12, the underground tank liquid level detection sensor 13, the underground tank oil leakage sensor 14, the leak liquid detection sensor 15 and the sensing It has a sensor 17.

The underground tank liquid level detection sensor 13 provides a reserve tank in communication with the space on the upper portion of the underground tank body 30 having a double wall structure that forms a space between the inner tank and the outer tank. A liquid is sealed in the reserve tank and a switch for detecting the liquid level is provided in the reserve tank. The controller 11 detects the liquid level in the reservoir tank based on the on-off signal of this switch and takes into account the liquid level and the oil temperature assumed from the signals detected by the oil level gauge 16 and the temperature sensor 12. Leakage judgment on the basis of abnormality such as cracking of the tank main body 30 is performed.

The underground tank oil leakage sensor 14 arranges a leakage sensor of a swelling resistance change type for detecting, for example, the presence of oil, in a gas detection tube embedded in the ground near the underground tank body 30. The control apparatus 11 judges oil leakage by detecting the change of the electrical resistance of the leak sensor by the leakage of oil.

The leak liquid detection sensor is, for example, arranged with a leak sensor of a swelling resistance change type for detecting an oil film in a case in which liquid flows freely therein.

The control apparatus 11 detects the presence of the oil film and the change of the electrical resistance of the leak sensor, and judges the intrusion of water such as rainwater into the manhole feed 32 or the leakage oil.

In addition, the control device 11 transmits the closing signal to the overflow prevention valve 19 when the oil level gauge 20 has received a signal reaching the predetermined upper limit liquid level when the oil level is being unloaded from the tank roller. It prevents overflow. In addition, the control device 11 prevents the risk of an earthquake by transmitting a closing signal to the overflow prevention valve 9 when the sensing sensor 17 receives a signal for detecting an earthquake.

In the underground tank management system 10 of the above-described configuration, the control device 11 is assumed to be the temperature of the liquid level and oil assumed from the signals detected by the liquid level meter 14 and the temperature sensor 12 from the signal of the underground tank liquid level detection sensor 13. In consideration of the above, the leakage judgment based on the abnormality of the underground tank main body 30 is performed, and the leakage liquid which judges the oil leakage in the ground around the underground tank main body 30 from the signal of the underground tank oil leakage sensor 14. Judgment of leakage of water, such as rainwater or the like, into the manhole pit 32 from the signal of the detection sensor is made, and the result thereof is displayed on the indicator 18. Further, an overflow prevention valve ( 19) transmits a signal to prevent the overflow and to close the overflow prevention valve 19 when receiving an earthquake detection signal from the signal of the sensing sensor 17. That is, it is to prevent the risk of earthquakes.

Therefore, the relationship between the various situations in the case of leakage oil does not depend on the judge's experience, and it becomes possible to monitor the abnormality of the underground tank at all times in a distant place, such as in an office.

In the above embodiment, the oil level gauge 16, the temperature sensor 12, the underground tank liquid level detection sensor 13, the underground tank oil leakage sensor 14, and the leak liquid detection which constitute the underground tank detection sensors 20. The sensor 15 and the sensing sensor 17 are examples, and other sensors having different configurations that can be detected in the same shape can be used.

In the present invention, a control device for collectively determining the abnormality by receiving the signals detected by the underground tank detection sensors and the underground tank detection sensors for detecting the abnormality and earthquake occurrence related to the oil leakage of the underground tank body, and An indicator for displaying the judgment result by the control device and an overflow prevention valve for loading and unloading controlled by the control device are provided to detect oil leakage and earthquake occurrence by the underground tank detection sensors. The abnormality is judged from the signals received from the underground tank detection sensors. The indicator is displayed on the indicator and the opening and closing of the overflow prevention valve is controlled so that the abnormality of the underground tank can be monitored at all times in a remote place. The invention is for storing fuel oil, such as gasoline, installed at the site of a gas station. It can be used for the underground tank management system of a gas station where tanks can be collectively managed.

Claims (3)

Underground tank detection sensors for detecting abnormalities and earthquakes related to oil leakage of the underground tank main body, and a control device that collectively determines the abnormality by receiving signals detected by the underground tank detection sensors, and this control device And an overflow prevention valve for unloading, the opening and closing of which is controlled by the control device and an indicator for indicating the judgment result by the control device, wherein the underground tank detection sensors are oil level meters for detecting the oil level stored in the underground tank body. A temperature sensor for detecting oil temperature, an underground tank liquid level sensor for detecting the liquid level of the liquid enclosed in the basement tank body having a double wall structure, and an underground tank for detecting the leakage of oil leaking into the ground near the body of the underground tank. Oil leakage sensor, leaking liquid detection sensor for detecting leaking liquid in the manhole pit of the underground tank main body and earthquake occurrence detection Underground tank management system characterized in that it comprises a damping sensor. delete The method of claim 1, The control device transmits a signal for closing the overflow preventing valve when receiving the upper limit signal of the oil level from the oil gauge or when receiving the signal of the earthquake from the vibration sensing sensor. .

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