JPS5876395A - Mine sweeping device - Google Patents

Abstract

PURPOSE:To find and destroy a magnetic mine by means of undersea towing by fixing a solenoid type superconductive magnet in a cryostat capable of withstanding the sealing of up to several atmospheres with its axis kept horizontal and by putting them in a container with a fish shape. CONSTITUTION:A magnet 1 is fixed in an inner cylinder 3 of a cryostat composed of the inner cylinder 3 and outer cylinder 4 with its axis kept horizontal by use of a heat insulating support material 5 made of carbon fiber reinforced plastic for fixing a superconductive magnet, then they are put in an external container 2 with a fish shape. Accordingly, since the superconductive magnet capable of generating a strong magnetic field is used, the device can be made lightweight and small-sized and its transportation and handling can be made easy. In addition, because the superconductive magnet is kept horizontal, the horizontal magnetic field component is strong, and an acoustic mine sweeping device can be easily set below the external container, thereby other acoustic mine sweeping device can be jointly used together.

Description

[Detailed description of the invention] Ru.

Conventionally, minesweeping wires have been used to sweep laid fibrous torpedoes. This electric wire has a lower specific gravity and floats on water.As shown in Figure 1, this electric wire has fins attached to it so that it forms a loop-shaped L. It is pulled from a non-metallic ship, and the end of the electric wire is fixed by passing a direct current through it. A magnetic field is generated in the loop L. The size of this magnetic field is 20 m in diameter at depths of 30 to 69 m.
From 0 to 300 IH, O. It generated S-S milligauss, and had the disadvantage that the vertical magnetic field component was stronger than the horizontal magnetic field due to the shape of the roof L, and the length of the electric wire was several 100 meters.

The present invention is a minesweeping device devised in view of the above points, and its feature is that a solenoid-type superconducting magnet is fixed with its axis horizontally in a cryostat that can withstand airtightness up to several atmospheres, and is made into a fish-shaped container. It is because I put it in.

An embodiment of the minesweeping device of the present invention will be described with reference to FIGS. 2 and 3.

As shown in Figures 2 (a) and (b), a solenoid-type superconducting magnet 1 in persistent current mode is used with its axis horizontal, placed in a fish-shaped container 2, and towed under the sea to carry out magnetic mines. The purpose is to discover and process.

The towing of this device is carried out either by a helicopter 60 as shown in Figure 2 (a) of the nylon row 150, or by a boat 70 (Fig. 2 (b)).

FIG. 3 is a detailed explanatory diagram of the device of the present invention, in which the solenoid type superconducting magnet 1 has an inner cylinder 6. Inside the inner cylinder of the cryostat consisting of an outer cylinder 4 (!Fixed with a heat insulating support material 5 for fixing a superconducting magnet made of FRP (carbon fiber reinforced plastic),
GFRP (glass fiber reinforced plastic) is used as the heat insulating support material 6 for fixing the inner cylinder. Furthermore, a spring 7 and a damper 1- are used to fix the Taliostat itself inside the outer container 2.
8 are used in combination. Note that 9 is a hook for attaching a nylon rope for towing.

The above-mentioned structure is intended to cope with the fact that when the minesweeping device is used, it is subjected to severe vertical and horizontal vibrations, and especially when entering the water, shocking vibrations are applied.

In addition, since liquid helium is used inside the cryostat, we have adopted a cryostat with a sealed structure so that it will not spill outside even if the outer container 2 is turned upside down.
The structure is such that gas helium is released when a certain pressure is reached. In addition, in order to suppress fluctuations in the liquid helium level, spherical polystyrene foam 10 is floated on the liquid surface, and several umbrella-shaped partition plates 11 are placed alternately between the superconducting coil 1 and the liquid surface to create a strong flow of liquid. I try not to let it happen.

When using a 0.4×10AT superconducting film with lengths o, tm, and outer diameter/, Om, the influence range is shown in the following table as an axial distance.

The minesweeping device of the present invention uses a superconducting magnet capable of generating a high magnetic field, so it is lightweight, compact, and easy to transport and handle.Since the superconducting magnet is used horizontally, the transverse magnetic field component is strong, and the external Since the acoustic sweeper can be easily set at the bottom of the container, it has the advantage of being able to be used in conjunction with other acoustic sweepers.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of a conventional minesweeping cable, Figure 2 is an explanatory diagram of how to use the minesweeping device of the present invention, and (a) is a diagram of a helicopter.
Fig. 3 is an explanatory diagram of an embodiment of the minesweeping device of the present invention. 1... Solenoid type superconducting magnet, 2..., outer container, 6
... Taliostat inner cylinder, 4... Cryostat outer cylinder, 5... Heat insulation support material for fixing superconducting magnet, 6...
・Insulating support material for fixing cryostat inner cylinder, 7... Spring for fixing cryostat, 8... Damper for supporting cryostat, 9... Hook for attaching nylon lobe, 10... Spherical polystyrene foam, 11... Umbrella Shape partition plate. Yoshi 1 figure"7r3 figure

Claims (1)

[Claims] 1. A solenoid type superconducting magnet with its axis horizontal,
A minesweeping device that is fixed in a cryostat that can withstand airtightness up to several atmospheres and placed in a fish-shaped container. 2. The minesweeping device according to claim 1, wherein the partition plates in the cryostat are arranged in alternating umbrella shapes, and the gaps between the partition plates are filled with foamed polystyrene balls.