JPS62182088A - Double tank - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a double tank buried underground, for example, at a gas station.

[Prior art 1] As is well known, a double tank consists of an inner tank into which liquid is placed and an outer tank surrounding the inner tank.
Even if the inner tank is damaged, the liquid in the inner tank will not leak out due to the outer tank, and even if the outer tank is damaged, groundwater, etc., will be blocked by the inner tank, so there will be no leakage of groundwater, etc. to the liquid in the inner tank. There is no chance of contamination. Therefore, such a double tank is suitable for use as an oil storage tank by being buried underground in a gas station.

In such a double tank, in order to detect damage to the inner tank and/or outer tank, liquid or gas is poured into the space formed between the inner tank and the outer tank, and both the inner and outer tanks are filled with liquid or gas. If any of the tanks is damaged, this will cause a change in the state of the liquid or gas contained in the space, such as a drop in the level of the detected liquid, which can be detected by the sensor to indicate damage to the inner tank and/or outer tank. It looks like this.

To manufacture such a double tank, for example,
As described in Japanese Patent No. 9-142984, the applicant arranged a welded outer plate around an inner tank by butt welding external plates constituting a slightly larger outer tank. Such two small tanks are effective because they are easy to manufacture and have no problems in terms of strength, but the space between the inner and outer tanks is not uniform, and the load , the space is collapsed and the inner and outer walls touch, making it impossible to detect the space between the fingers.

[Object of the Invention] Therefore, an object of the present invention is to provide a double tank that can detect damage or breakage in any part by simply providing a pipe or the like that communicates with one sensor.

[Structure of the Invention] The double tank according to the present invention has a liner interposed between the inner wall and the outer wall of the double tank, which forms an independent chamber with the inner wall J3 and the outer wall, and the inner wall, the outer wall, and the liner. The chambers formed by the above are connected to each other.

[Effects of the invention rA] Therefore, since the double tank has a liner interposed between the inner wall and the outer wall that constitute the 2ffi tank, the inner tank is supported by the outer tank through the liner. The inner tank is supported by the outer tank by a wide support surface, which prevents the space between the inner and outer walls from collapsing and creates a strong double tank.
In addition, by interposing the liner, independent chambers are formed by the inner and outer walls of the double tank and the liner, but since each chamber is in communication with the double tank, In order to detect damage to the inner and outer walls, the liquid or gas inserted between the inner and outer walls communicates with each other, and the pipe that communicates with the sensor that detects changes in the liquid or gas is 1.
Just set it on the side.

[Preferred Embodiment] When carrying out the present invention, it is preferable to use a honeycomb structure with small holes or a corrugated plate as the liner. In order to communicate the chambers formed by the inner and outer walls and the liner, small holes may be provided in the liner, or a communicating hole, such as a pipe, may be provided on the upper part of the outer wall so that the chambers can communicate with each other. good. Further, the liner may be made of a metal plate or a synthetic resin plate, and the thickness of the liner (the distance between the inner wall and the outer wall of the small tank) will vary depending on the size of the tank. Approximately 3Ia is appropriate.

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

As shown in FIGS. 3 and 4, the double tank of the present invention has a relatively thick iron tank 4 serving as an inner tank 1, and a rust preventive material 5 is applied to the outside of the tank 4. A liner 3A made of a honeycomb structure with communication holes 9 formed on the outside thereof is provided. The liner 3A is usually made of iron plate, but may also be made of synthetic resin. Furthermore, live-
A relatively small iron plate 6 is provided on the outside of the tank 3 as an outer tank 2, and weather-resistant resin scraps 7 are applied on the outside of the iron plate 6. As shown in FIG. 2, the upper spaces of the inner tank 1 and the outer tank 2 are connected by a C-shaped pipe 10, and the pipe 10 is provided with a flange 12. As shown in FIG. 1, this double tank is buried underground in a gas station, a pipe 11 is connected to a flange 12, and a pipe 14 is connected to each flange 13 of the inner tank.

To detect damage to the inner tank 1 and/or outer tank 2, fill the space 3 formed between the inner tank 1 and the outer tank 2 with liquid or gas through the pipe 11, and Attach Sen V- to the coupling. If either of the inner or outer tanks 1.2 is damaged, the state of the liquid or gas contained in the space 3 will change, such as a drop in the level of the detection liquid, and this will be detected by a sensor and the inner tank 1 or/or the outer tank 2 damage can be detected.

Note that independent chambers 8 are formed by the inner tank 1, the outer tank 2, and the liner 3A made of a honeycomb structure, but each chamber 8 is communicated with each other through a communication hole 9 formed therein. Therefore, in order to detect damage to the inner tank 1 and the outer tank 2, the fluid placed between the inner tank 1 and the outer tank 2 communicates through the hole 9, and a sensor for detecting a change in the state of the fluid is connected to the pipe 11. It would be a good idea to provide 1@. Further, the inner tank 1 is supported by the outer tank 2 via a liner 3A made of a honeycomb structure, and thus the support area is increased, resulting in a strong double tank.

In the second embodiment shown in FIGS. 5 and 6, the inner tank 1
A liner 3B made of a corrugated plate is interposed between the tank 2 and the outer tank 2. The liner 3B may be made of an iron plate, or may be made of an oil-resistant synthetic resin plate. An independent chamber 8 is formed by the inner tank 1, the outer tank 2, and the liner 3B made of a corrugated plate. These chambers 8 are interconnected by a C-shaped tube 10. Therefore, in this embodiment as well, it is only necessary to provide one sensor in the pipe 11 for detecting changes in the state of the fluid inserted between the inner tank 1 and the outer tank 2. Further, the inner tank 1 is supported by the outer tank 2 via a liner 3B made of a corrugated plate, so that the supporting area is increased and two small tanks are formed which are strong and strong. In the third embodiment shown in FIG. 7, a liner 3C made of a grooved plate is interposed between the inner tank 1 and the outer tank 2. This liner 3C is made of an iron plate, and may be made of an oil-resistant synthetic resin plate. An independent chamber 8 is formed by the inner tank 1f3, the outer tank 2, and the liner 3C made of a grooved plate. Each of the snow chambers 8 is communicated with phase η by a C-shaped tube 10. Therefore, in this embodiment, the pipe 11 only needs to have one sensor lt- for detecting a change in the state of the fluid placed between the inner tank 1 and the outer tank 2. Furthermore, in this embodiment, since the grooves of the liner 3C are formed only on the inside, there is no need to provide the iron plate 6 as shown in the second embodiment.

[Summary] As described above, according to the present invention, a space is formed by the liner and the space is communicated, so a durable lfJ
The tank is constructed in a simple manner, and damage or damage to the tank can be detected with just one sensor υ-.

[Brief explanation of drawings]

1 to 7 show a double tank according to an embodiment of the present invention, FIG. 1 is a cross-sectional view of the double tank, FIG. 2 is an external perspective view of the double tank, and FIG. 3 is a perspective view of the double tank. FIG. 5 is a diagram of a first embodiment of a double tank, FIGS. 4 and 6 are diagrams of a second embodiment of a double tank, and FIG. 7 is a sectional view of a third embodiment. 1...Inner tank 2...Outer tank 3A...
Liner 3B made of a honeycomb structure...Liner made of a corrugated plate 8...Chamber 9...Communication hole Patent applicant Tokyo Tatsuno Co., Ltd., ='-=:
hRepresentative Patent Attorney Toshi Tadashi Takahashi;”',”,
Door 1--Na Toshikuni Takahashi: 11--I Figure 1 Figure 2 Figure 4 Buddha

Claims (1)

[Claims] A liner is interposed between the inner wall and outer wall of the double tank, and the inner and outer walls form independent chambers, and the chambers formed by the inner and outer walls and the liner are communicated with each other. A double tank featuring