JPS6156681B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to an oil-filled power distribution box provided outside a pressure-resistant compartment of a submersible.

[Prior art and its problems]

It is desirable that a submersible's power distribution box be as small and lightweight as possible, fully utilize the ship's functions, and be highly reliable and easy to maintain and inspect.

Conventional submarine power distribution boxes are located inside the pressure compartment along with the crew, and are equipped with electrical distribution equipment used in the air. This structure had the disadvantage that the volume of the pressure compartment was limited, reducing the space required for crew members, measuring instruments, etc., and reducing the overall functionality of the submersible. In addition, providing a pressure-resistant compartment exclusively for the distribution box would be expensive in terms of strength, and it would also be necessary to equip a gas adsorption chemical substance to capture the gas generated by the arc of the electromagnetic contactor, etc., and it is necessary to periodically replace it on a submersible. There were some drawbacks that could affect operations.

[Purpose of the invention]

The present invention eliminates the above-mentioned drawbacks, and provides a compact, lightweight, and inexpensive oil container that consolidates power distribution equipment, stores it in a pressure-balanced oil container, installs it outside the pressure-resistant compartment, and handles the gas generated. The purpose is to provide incoming power distribution boxes.

[Key points of the invention]

In order to achieve the above object, the present invention provides an oil-filled power distribution box that is installed outside a pressure-resistant compartment of a submarine, in which a sealed box is filled with insulating oil to house power distribution equipment, and the pressure on the wall surface of the sealed box is equalized. An elastic membrane provided in the chamber partitions the insulating oil and seawater to maintain equal pressure inside and outside the sealed box, and operates to release gas when the internal pressure of the sealed box becomes greater than a predetermined value. The present invention is configured as an oil-filled power distribution box for a submarine, characterized in that a differential pressure valve is provided on the upper wall of the sealed box.

[Embodiments of the invention]

Next, embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of an oil-filled distribution box according to an embodiment of the present invention, FIG. 2 is a front view of the oil-filled distribution box with the front cover removed, and FIG. 3 is a front view of the oil-filled distribution box with the front cover attached.
It is an X-view cross-sectional view. In the figure, reference numeral 1 denotes an oil-filled sealed box to which a front lid 2 is attached via a packing 21 so as to be openable and closable. A lubricant plug 5 and an air vent plug 6 for lubricating are attached to the first upper surface through the ceiling wall, and a water drain plug 7 is attached to the lower surface. Inside the box 1, an electromagnetic contactor 8 and a fuse unit 9 are housed fixedly to the box. These power distribution devices are connected to external electric wires via electric wire connectors 10, 11, and 12 that are installed through the walls of the box. Note that a water intrusion detection device 14 is provided close to the bottom surface of the box 1.

In such a power distribution box, a gas vent pipe 4 with a differential pressure valve 3 attached to the tip is attached to the top surface of the box 1, and the differential pressure valve 3 operates when the pressure inside the box becomes higher than a predetermined pressure. . Also, front lid 2
A pressure equalization device is installed inside. As shown in Fig. 3, this device consists of through holes 22 provided on both sides of the pressure equalization chamber 13 and an elastic membrane that partitions the pressure equalization chamber 13 to keep the pressure of the insulating oil equal to the pressure of the water outside the ship. It's becoming like that.

In such a configuration, when a submersible dives, the sealed box is compressed due to the increase in water pressure, and the oil temperature rises due to heat loss from the power distribution equipment during operation, causing the oil to expand. absorbs this compression or expansion allowance and always maintains a balance between the internal and external pressures of the container. Further, the contactor 8 is opened and closed in oil, and gas is generated by the arc generated when the contactor 8 is opened and closed. This gas stays in the upper part of the box, and as its amount increases, it presses the oil level and increases the gas pressure. However, if it is absorbed by the pressure equalization device and the gas pressure is still higher than the water pressure outside the ship, a differential pressure valve will not be activated. 3 is activated and releases gas into the water.

〔Effect of the invention〕

According to the present invention, the pressure of the oil inside the sealed box is always kept in balance with the water pressure outside the boat by the action of the pressure equalizing device.
Since the closed box does not need to be a pressure-resistant container, the board thickness can be reduced, the cooling effect is good, the box is small and lightweight, and there is no risk of fatigue failure. In addition, gas generated by power distribution equipment that is opened and closed in oil inside the vessel is appropriately released into the water outside the vessel by the differential pressure valve, so there is no need for a gas capture device. Since it is absorbed by the device, it has the effect of reducing the number of times the differential pressure valve operates. Furthermore, it is easy to open and close in oil, and the equipment has a long lifespan, which has the effect of reducing costs, improving reliability, and ultimately improving the functionality of submersibles.

[Brief explanation of the drawing]

Fig. 1 is a plan view of an oil-filled distribution box according to an embodiment of the present invention, Fig. 2 is a front view with the front cover removed, and Fig. 3 is a sectional view taken along line XX with the front cover attached. It is. 1... Sealed box, 2... Front lid, 3... Differential pressure valve,
4...Gas vent pipe, 5...Lubrication plug, 6...Air vent plug, 7...Water vent plug, 8...Magnetic contactor,
9... fuse unit, 10, 11, 12...
Wire connector, 13... pressure equalization chamber, 14... water intrusion detection device, 21... packing, 22... through hole.

Claims (1)

[Claims] 1. In an oil-filled distribution box installed outside the pressure-resistant compartment of a submersible, in which a sealed box is filled with insulating oil to house power distribution equipment, the insulation is A differential pressure valve is provided on the upper wall of the sealed box to partition oil and seawater to maintain equal pressure inside and outside the sealed box, and to operate and release gas when the internal pressure of the sealed box exceeds a predetermined value. An oil-filled power distribution box for a submarine, characterized in that it is provided with: