JPS6016169B2 - Oil tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel tank provided at a cable terminal or the like.

In the oil tank, it is necessary to adjust the oil amount with other connected systems and to detect the oil supply status.

Conventionally, for this purpose, a tank 11 as shown in FIG.
A fuel tank is known which has a bellows type cell 12 built therein and is equipped with a level gauge 13 for detecting the amount of oil in the tank 11.

16 is oil and 17 is gas.

Although this oil tank is convenient because it has a simple structure and there is no error in displaying the amount of oil, it has the following drawbacks.

'1} Since the liquid level gauge 13 requires transparent material, it is easily damaged.

[21] If the liquid level gauge 13 is damaged, the oil 16 in the tank 11 will leak out, creating dust that is dangerous and can also cause failures in other connected systems (for example, oil-filled power cables).

In order to overcome these drawbacks, oil tanks that detect the oil level without using a level gauge are being considered, but they are not necessarily suitable because the equipment is complex and there is a risk of malfunction. do not have.

For this reason, a fuel tank as shown in FIG. 2 has been considered and has achieved great effects.

That is, in FIG. 2, a liquid reservoir 24 is provided that moves up and down in conjunction with the expansion and contraction of the bellows-type cells 22 inside the tank 21, and the transparent tube 23 provided outside the tank 21 and the liquid reservoir 24 are connected to each other. They are connected by a flexible pipe 25, and the amount of oil is detected using a liquid 28 of a different system than the oil 26 in the oil supply tank.

27 is gas.

With such a fuel tank, even if the transparent tube 23 were to break, only the detection liquid 28 would leak out, and a large amount of the oil 26 in the tank would not leak out, preventing a major accident. It is possible to prevent this.

However, since the transparent tube 23 is made of glass or plastic, it cannot solve the problem that it is easily damaged.

In view of this situation, the present invention aims to provide a sturdy oil tank that is resistant to damage without being limited to transparent pipes.

The configuration of the present invention will be specifically explained with reference to explanatory drawings showing one embodiment.

In FIG. 3, a bellows-type cell 2 that expands and contracts to change its volume is provided in a tank 1, and the inside of the bellows-type cell 2 is filled with oil 6, and the outside is filled with gas 7. .

A liquid reservoir 4 is attached to the upper surface of the bellows cell 2 and is configured to move up and down in response to changes in the volume of the bellows cell 2. A liquid head tube 3 made of a strong, rigid metal body, for example, is provided outside the tank 1, and a liquid head tube 3 is provided so that the liquid 8 in the liquid head tube 3 and the liquid 8 in the liquid reservoir 4 communicate with each other. The head tube 3 and the liquid reservoir 4 are connected by a steerable tube 5.

The area of the liquid surface in the liquid reservoir 4 is configured to be considerably larger than the area of the liquid surface in the liquid head tube 3 so that the change in the volume of the bellows type cell 2 becomes a liquid head in the liquid head tube 3 and becomes noticeable. It is desirable that the

A liquid head detector 9 is provided at the bottom of the liquid head tube 3, and detects the liquid head from the pressure caused by the height of the liquid head. In order to accurately detect the liquid head regardless of the gas pressure in the gas space 7 in the tank, the upper space of the liquid reservoir 4 is connected to the gas space 7 in the tank 1, and the upper part of the liquid head pipe 3 is also connected. Also gas space 7
The liquid head detector 9 preferably detects the difference between the gas pressure in the gas space 7 and the pressure due to the height of the liquid head (which is the sum of the liquid head pressure and the gas pressure).

The liquid head detector 9 may be a Fuldon tube type or a strain gauge type, but it is preferable to use one that can be easily converted into an electrical signal.

The oil tank of the present invention has the following remarkable effects. '1} Since the amount of oil in the oil supply tank is determined by the liquid head using a liquid head tube and a liquid head detector, the liquid head tube does not need to be a transparent tube and must be constructed using a material with high mechanical strength. A more durable fuel tank can be obtained.

■ Even in the unlikely event that the liquid head pipe is damaged, only the detection liquid will leak out, and the oil in the oil tank will not leak out, preventing a major accident.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams showing a conventional oil tank, and FIG. 3 is an explanatory diagram showing an embodiment of the present invention. 1: Tank, 2: Bellows cell, 3: Liquid head tube, 4: Liquid reservoir, 5: Flexible tube, 6: Oil, 7: Gas, 8: Liquid, 9:
Liquid head detector. Oh zu soup Otsai Sai 3

Claims (1)

[Claims] 1. In an oil supply tank incorporating a bellows-type cell whose volume changes, a liquid head pipe 3 is provided outside the tank 1,
A liquid reservoir 4 is provided in the tank 1 that moves up and down in conjunction with changes in the volume of the bellows-type cells 2 in the tank 1, and the liquid 8 in the liquid reservoir 4 and the liquid 8 in the liquid head tube 3 are The liquid reservoir 4 and the liquid head tube 3 are connected by a flexible tube 5 so as to communicate with each other, and the liquid head tube 3 is provided with a liquid head detector 9 that detects the liquid head based on pressure. A fuel tank characterized by: 2. The oil supply tank according to item 1, wherein the area of the liquid surface in the liquid reservoir 4 is larger than the area of the liquid surface in the liquid head tube 3. 3. The oil supply tank according to item 1, wherein the liquid reservoir 4 is fixed to the upper surface of the bellows type cell 2. 4 In the upper space of the liquid reservoir 4, there is a gas space 7 inside the tank 1.
2. The fuel tank according to item 1, wherein the fuel tank is in communication with the fuel tank. 5. The fuel tank according to item 1, wherein the upper part of the liquid head pipe 3 communicates with the gas space 7 inside the tank 1. 6. The oil supply tank as described in the preceding paragraph, characterized in that the liquid head detector 9 is configured to detect the difference between the liquid head pressure in the liquid head pipe 3 and the gas pressure in the gas space 7 inside the tank 1. . 7. The fuel tank according to item 1, wherein the material of the liquid head pipe 3 is a rigid metal body.