JPH06263188A - Safety device for partitioned tank - Google Patents

Abstract

PURPOSE:To accurately detect any leakage from each chamber of a tank so as to assure safety by a method wherein, in an underground tank for storing different kinds of liquids by providing a partition therein, the structure of the partition is made up of two walls and a leakage sensor is provided in a space therebetween. CONSTITUTION:In an underground tank T at the compound A of a gas service station, a partition P having its double wall structure made up of partition plates 8a and 8b and a space C defined therebetween is provided to divide the interior of the tank into a first chamber 1 and a second chamber 2. In this space C, a sensor S is provided to detect any leakage from either of the chambers 1 and 2. This sensor S is connected through a line L to a warning part 10 in a case 9 provided above the partition P and, upon detecting any leakage, activates the warning part 10. In this way one unit of the tank suffices to serve the purpose unlike the conventional case where two separate units of the tank are required and, therefore, the overall tank installation area, costs, etc., can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a partition tank in which a tank buried in the ground is provided with a partition to store different kinds of liquid.

[0002]

2. Description of the Related Art For example, an underground tank used in a gas station may have a partition to store a plurality of different kinds of liquid.

However, when the inner partition plate is damaged or corroded due to external force such as earthquake or deterioration of electric contact, different liquids leak and mix with each other. In particular, gasoline and kerosene are stipulated by the Fire Service Act so that they are not adjacent to each other in consideration of safety.

In the conventional underground tank, it is extremely difficult to detect that the partition plate is damaged or corroded, which causes the above-mentioned safety problem.

[0005]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a safety device for a partition tank which is capable of detecting damage and corrosion of the partition plate and has high safety.

[0006]

According to the present invention, in a safety device for a partition tank in which a tank buried in the ground is provided with a partition to store different kinds of liquids, the partition has a double structure. is doing.

Further, according to the present invention, a sensor for detecting liquid leakage is provided in the space of the partition of the double structure.

[0008]

[Explanation of Operation and Effect] Therefore, when one partition plate of the double-structured partition is damaged or corroded, the liquid in one chamber flows into the space of the double-structured partition. Then, by checking the presence or absence of the liquid between the partition plates, it is possible to know the damage or corrosion of the middle partition plate. Also, if a sensor is attached between the partition plates, it can be known immediately and even at a remote place.

As described above, according to the present invention, the safety of the intermediate partition tank can be improved, and as a result, one tank can be installed instead of installing two or more tanks. Also, it occupies a small area.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION In the practice of the present invention, the sensor may be either a liquid or a vapor. It is also possible to fill the space with liquid and detect the liquid level. Further, the notification unit may be provided above the partition of the tank, or may be provided in a distant place, for example, in an office by a signal line.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

An underground tank T is buried in the underground of the site A of the gas station, and the underground tank T is divided into a first chamber 1 and a second chamber 2 by a partition indicated by a symbol P as a whole. ing. At the top of each room 1, 2 is a manhole 3a,
3b is provided, and an injection pipe 4 is provided in each manhole.
a, 4b, suction pipes 5a, 5b, and ventilation pipes 6a, 6b stand up, the suction pipes 5a, 5b are connected to an oil supply device, respectively, and the ventilation pipes 6a, 6b are connected to an atmosphere release pipe (not shown). It is connected.

Further, the presence or absence of oil leakage from the underground tank T is detected by gas detection pipes 7a and 7b provided adjacent to the tank T.

According to the present invention, the middle partition P is composed of two partition plates 8a and 8b in a double structure.
A space C is formed between a and 8b. A sensor S is provided below the space C.

Further, a case 9 is provided above the partition P, and an informing section 10 is provided in the case 9. The sensor S and the notification unit 10 are connected by a line L.

The notification unit 10 can be installed in the office O, for example, as indicated by reference numeral 10a.

[0017]

As described above, according to the present invention, since the partition wall has a double structure, any leak from any chamber can be detected, which is extremely preferable for safety. Further, by providing a sensor between the partition plates, the leak can be immediately detected and can be transmitted to a remote place. Furthermore, when two tanks were required in the past, only one tank is needed, and the overall installation area can be reduced and the construction period can be shortened.

[Brief description of drawings]

FIG. 1 is a sectional side view showing an embodiment of the present invention.

[Explanation of symbols]

 1 ... 1st chamber 2 ... 2nd chamber 3a, 3b ... Manhole 4a, 4b ... Injection pipe 5a, 5b ... Suction pipe 6a, 6b ... Vent pipe 7a, 7b ... Gas detection tube 8a, 8b ... Partition plate 9 ... Case 10,10a ... Notification section O ... Office P ... Intermediate partition S ... Sensor T ... Tank

Claims (2)

[Claims] 1. A safety device for a partition tank in which a tank buried in the ground is provided with a partition to store different kinds of liquids, wherein the partition has a double structure. Safety device. 2. The safety device for a partition tank according to claim 1, wherein a sensor for detecting liquid leakage is provided in the space of the partition of the double structure.