JPH048358Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an oil leakage detection device that detects oil leakage into a conductive liquid.

[Conventional technology]

Conventional oil leak detection devices of this type include:
For example, as shown in Japanese Utility Model Application Publication No. 59-117924, an oil leak detection sensor is provided in a main body formed by simply connecting an upper floating body and a lower floating body, and a sensor lead cable for winding is attached to the oil leak detection sensor. There is a configuration that is made by connecting .

This oil leakage detection device exclusively detects oil leakage at the deep liquid level in a pipe, and is used by lowering the main body to the liquid level by operating the sensor lead cable.

[Problem that the invention attempts to solve]

However, in the conventional example described above, the oil leakage detection device is held on the inner wall of the pipe to prevent it from falling over, so it may be exposed to liquid levels outside the pipe or inside large-diameter pipes. When floating, the stability (vertical righting ability) was poor, and the problem was that it was difficult to accurately detect oil leakage.

Additionally, as the oil leak detection device is inserted deeper into the pipe, the friction generated by contact between the inner wall of the pipe and the sensor lead cable increases.
It was difficult to insert the oil leak detection device into the pipe.

Therefore, this invention was made by focusing on such conventional problems, and it has stability that can be used both at the liquid level inside the pipe and at the general liquid level, and it has a structure that can be used inside the pipe. The object is to obtain an oil leakage detection device that is easy to insert.

[Means for solving problems]

This invention consists of an upper floating body, a lower floating body, a cylindrical body connecting both floating bodies and extending downward from the lower floating body, and a built-in part of the cylindrical body that is communicated with the outside world between the two floating bodies. The system includes an oil leak sensor and a cable connected to the oil leak sensor.

[Effect]

The cylindrical body reliably connects and holds the upper floating body and the lower floating body, and the portion of the cylindrical body extending downward from the lower floating body acts as a weight to balance the two floating bodies, thereby stabilizing the posture. In particular, the oil leak detection device of the present invention is prevented from shaking when it is suspended by a cable or when it is suspended on a liquid surface.

The oil leakage sensor built into the cylindrical body between the two floating bodies is held substantially at the liquid level by the buoyancy of the lower floating body. Furthermore, when an oil layer is generated on the liquid surface, buoyancy acts on the oil to maintain the relative height between the upper floating body and the oil surface. Therefore, the oil leakage sensor built into the cylinder reliably contacts the oil layer and detects the oil leakage state. This oil leak state is detected when oil intervenes between the electrodes of the oil leak sensor and the electrical characteristics between the electrodes change.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the drawings.

In the figure, A is the main body of the oil leakage detection device. 1 is a hollow cylindrical upper floating body made of synthetic resin material, etc.;
2 is a hollow cylindrical lower floating body similar to the upper floating body 1. These floating bodies 1 and 2 are integrally provided with a predetermined interval therebetween by a stainless steel cylinder 3 that passes through the lower floating body 2 in the axial direction.

The cylindrical body 3 is fixed to the penetrating lower floating body 2 with bolts 4 and nuts 5 made of stainless steel, for example. Further, the upper end of this cylinder 3 is provided with a top plate 3a that closes the opening, which is fitted through a hole made on the lower surface of the upper floating body 1, and is fitted with stainless steel bolts 4 and nuts 5 to tighten the upper floating body. It is fixed at 1.

Further, the portions of the upper floating body 1 and the lower floating body 2 that contact the pair of cylinders 3 are watertight so that the air inside them does not escape. Since the portion 3b of the cylinder 3 that protrudes downward from the lower surface of the lower floating body 2 has a predetermined weight, it functions as a weight to stabilize the floating state of the upper floating body 1 and the lower floating body 2. do.

Further, a plurality of vertically elongated through holes 6 are formed in the circumferential wall of the portion 3c of the cylinder 3 located between the upper floating body 1 and the lower floating body 2 to allow liquid to pass therethrough. In addition, the said part 3c is forming the cylinder which connects both the floating bodies 1 and 2 in this invention.

Furthermore, an oil leakage sensor 7 is built in and fixed in the portion of the portion 3c in which the through holes 6 to 6 are formed. The oil leak sensor 7 is made of a continuous porous tetrafluoroethylene resin material containing a conductive substance, and has a pair of spaced apart electrodes (not shown) inside.

In the figure, reference numeral 9 denotes a cable formed by covering two power lines 8, 8 independently with an insulating material 10 and integrally forming the power lines 8, 8 at one end of the cable 9. It is connected to each electrode of the oil leak sensor 7. The cable 9 passes through the upper surface of the upper floating body 1 and the upper end surface of the cylindrical body 3, passes through the cylindrical body 3, and is connected to an electrode of the oil leakage sensor 7. The upper surface of the upper floating body 1 and the top plate 3a of the cylindrical body 3 are in contact with this cable 9.
The section is designed to be watertight.

In particular, a sealing material 11 that also serves as a reinforcing material is provided at the contact portion between the upper surface of the upper floating body 1 and the cable 9 so as to support the weight applied when the oil leak detection device main body A is suspended by the cable 9.

In the embodiment described above, a large buoyancy force is applied to the lower floating body 2 so that the upper floating body 1 is exposed from the liquid surface. When an oil layer is formed on the liquid surface due to oil leakage, this upper floating body 1 floats on the surface of the oil layer, and the oil leak sensor 7 built into the cylinder body is reliably located in the oil layer, and the oil leakage is transparent. It passes through the holes 6 to 6 and reaches the sensor 7.

Furthermore, since this oil leakage sensor 7 detects oil leakage into liquid, if a current is supplied to the oil leakage sensor 7 and the current is reduced or cut off due to oil leakage interposed between the electrodes, Additionally, confirmation means for issuing a warning by inputting information to a buzzer, lamp, etc. is separately connected to the other end of the cable 9.

Although the embodiments have been described above, considerable design changes are expected in accordance with the gist of the invention.

The oil leakage detection device according to this invention is suspended from the opening at the top end of the pipe until it reaches the liquid level. The weight of the body part 3b maintains the vertical position like a fishing float. Furthermore, even when floating in a place where there is some current, such as on the sea surface, it maintains a stable vertical state, and since it is moored with a cable, it can maintain a predetermined position without being washed away.

In the above embodiment, the cylinder body 3 integrally forms the main structural member, the sensor support member, the oil leak guide member, and the vertical restorability maintenance suspension, so that the structure is simple, economical, and highly reliable. It becomes a device.

Further, the upper floating body 1 and the lower floating body 2 can be formed into various shapes by using a foamed resin material or the like having a large buoyancy, instead of being a hollow cylindrical body.

Furthermore, in the above embodiment, a cable formed by integrally covering two power lines also serves as a mooring string, but it is of course possible to use a cable in which a mooring string is attached to a covered power line. be.

Furthermore, in the above embodiment, the oil leakage sensor is made of a continuous porous tetrafluoroethylene resin material, but various types of water-repellent materials such as other fluororesin materials can also be used. Needless to say, it will happen.

[Effect of idea]

As is clear from the above explanation, in this invention, by providing cylinders in the cylinders of the upper floating body and the lower floating body, the oil leakage sensor built into this cylinder part is located at the liquid level and The weight of the cylindrical body extending downward from the lower floating body has the effect of stabilizing the posture of the oil leak detection device main body. Therefore, there is an advantage that the main body of the oil leakage detection device can be used to detect oil leakage on a wide range of liquid surfaces.

In addition, by stabilizing the posture of the oil leak detection device body in this way, when lowering the oil leak detection device body to the liquid level deep inside the pipe, it is possible to prevent the body from swinging and to prevent the oil leakage detection device body from swinging against the inner wall of the pipe. It can be lowered smoothly along the line. In addition to this, even if the cable comes into contact with the inner peripheral wall of the pipe and some friction occurs due to the weight of both the upper and lower floating bodies and the cylindrical body, it is effective in allowing the oil leak detection device to reach the target liquid level position. .

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an embodiment of a water leakage detection device according to this invention, and FIG. 2 is a sectional view of the same. A... Oil leak detection device main body, 1... Upper floating body, 2
... lower floating body, 3 ... cylinder body, 7 ... oil leak sensor,
9...Cable.

Claims (1)

[Claims for Utility Model Registration] (1) An upper floating body, a lower floating body, a cylindrical body connecting both floating bodies and extending downward from the lower floating body, and a portion of this cylindrical body between the two floating bodies. The oil leakage sensor is equipped with an oil leakage sensor built in and communicated with the outside world, and a cable connected to the oil leakage sensor, and a weight is formed by a portion of the cylindrical body below the lower floating body, and the oil leakage sensor is An oil leakage detection device characterized by having a structure that detects oil leakage by detecting changes in electrical characteristics between electrodes caused by oil leakage intervening between the electrodes. (2) The oil leak detection device according to claim 1, which is a lower floating body and obtains most of the buoyancy of the entire buoyancy. (3) The oil leak detection device according to claim 1, wherein the cable serves as a signal line or power line and a mooring string.