JPH048665B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to the structure of a pressure-tight sealed cylindrical container for housing electronic equipment and the like.

[Background technology and problems] Submarine cable burying equipment, electrical control system equipment that controls equipment used in deep water such as underwater bulldozers, etc.
To be attached to the underwater bulltozer, these electrical control system equipment, etc. are housed in a pressure-resistant sealed container. The submarine cable burial equipment,
It can be submerged in water along with underwater bulldozers, etc.

In a pressure-tight sealed container that is subject to external pressure of this type, the following should be considered, including the electrical control system equipment that is housed:
(b) Submarine cable burial equipment and underwater bulldozers are used in environments where the temperature changes rapidly, such as at sea or underwater, but in this case, the pressure-resistant sealed container is subject to thermal stress. Do not destroy (c)
There is no condensation in the pressure-resistant sealed container, and (d) it is easy to maintain the electrical equipment stored inside and the pressure-resistant sealed container itself, but the present invention particularly focuses on the above (b) environmental temperature. This relates to a pressure-resistant cylindrical container constructed to be able to cope with thermal stress caused by sudden changes in the temperature.

[Means for Solving the Problems] In short, the present invention is such that a cylindrical container is placed over a main frame, the main frame and the cylindrical container are hermetically fixed to each other at one end, and O-rings are attached to each other at the other end. The main frame and the cylindrical container are configured so that their relative expansion/contraction and relative rotation are released through the O-ring.

The present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 1 shows the main frame, FIG. 2 shows a sealing part using an O-ring, FIG. 3A is a front view of an embodiment of the present invention, and FIG. 3B is a side view of the same.

In FIG. 1, reference numeral 1 denotes a fixed flange portion formed in a circular shape from a material that will not be corroded even if it is inundated with water such as seawater, and 2 is a floating flange portion formed in a circular shape from the same material as the fixed flange portion 1. Reference numeral 3 denotes a beam for firmly fixing both the flange portions, and a plurality of rectangular cross-sectional materials having sufficient mechanical strength are fixed by, for example, welding, and the main frame is constituted by these beams.

4 is a frame spacer that straddles the beam 3 and also serves as a balance weight at a plurality of predetermined positions;
Frame guides 5 span the beam 3 and are arranged at a plurality of predetermined positions, and are fixed to the beam 3 by, for example, welding or screwing.

By installing such a frame spacer 4 and frame guide 5, a rigid contact structure with further increased rigidity can be obtained.

In FIGS. 3A and 3B, 101 is a cylindrical container, and a reinforcing member is attached to one end of the cylindrical container 101.
A flange 109 is integrally attached by 10, and the other end is attached to a flange 102 as shown in FIG.
It is of a shape that is equipped with. Also, in Fig. 3, 107 is a cover on the cable head side;
The cover 107 is configured to be opened and closed by a chisel 108, and 106 is a cover with a flange that covers the surface of the flange 102 of the cylindrical body.

The main frame is passed through a hole formed in the bottom surface of the cover 107, and a hole (not shown) is inserted into the overlapped portion of the bottom surface and the fixing flange portion 1 of the main frame.
Interpose a sealing material and tighten and fix with bolts and nuts.

In FIG. 1, the electric wires are waterproof connected by a plurality of waterproof connectors 7 provided on the fixed flange portion 1 and drawn out to the main frame side. Reference numeral 6 indicates a vibration isolator, which is attached to the beam 3 at a necessary position to fix each device incorporated in the main frame and provide for vibration and shock.

With each device installed, the cylindrical container 101 shown in FIG. 3 is placed over the main frame, and the flange 109 is attached to the fixed flange portion using bolts and nuts with a sealing material (not shown) interposed. Tighten and fix.

The flange 102 at the rear end of the cylindrical container 101 is connected to the floating flange portion 2 on the main frame side on its inner peripheral surface.
The inner circumferential surface side of the flange 102 faces the outer circumferential surface of the flange 102 with a slight gap left.
Stepped portions 112 and 113 are formed in two stages toward the outside with a diameter larger than the diameter of the floating flange portion 2 .

An O-ring 103 is inserted into the first step 112, and a back-up spring 10 with an L-shaped cross section is inserted into the O-ring 103.
4, and this backup spring 104 and 2
A back-up spring gasket 105 is interposed between the side wall of the stepped portion 113 of the step, and the bolt 114 is
is tightened against the side wall to form an O-ring 103 for sealing. Since the bolt 114 is tightened using the flange on the side of the cylindrical container as the point of force,
Even if the O-ring 103 slides, a constant pressure seal is maintained. Thereafter, the flanged cover 106 is joined to the flange 102 with bolts and nuts, with a sealing material interposed if necessary. In FIG. 3, reference numeral 111 indicates a fitting for attaching to other parts. Note that the order of assembly does not have to be the order described above.

[Action/Effect] As explained above, according to the configuration of the present invention,
A container exposed to atmospheric environmental temperature suddenly reaches a depth of 500m.
If the diver dives to a depth of 100°, excessive thermal stress will occur due to the rapid increase in environmental temperature. In order to eliminate this thermal stress, the floating flange on the main frame side and the opposing flange on the cylindrical container side are relatively displaced in the length direction or rotational direction while maintaining a sealed state. It can relieve thermal stress.

If necessary, on the water, remove the flanged cover 106, remove the back-up spring 104 inserted between the flange 102 and the floating flange part 2, and remove the cylindrical container 101 from the fixed flange part 1. This removal is extremely simple, just by removing bolts and nuts from each part, and the maintenance and inspection of the electrical equipment etc. to be housed is extremely easy.

As described above, the cylindrical container of the present invention can extremely skillfully release large thermal stress generated in the container itself due to environmental changes, and can prevent destruction of the container due to stress accumulation.

[Brief explanation of drawings]

FIG. 1 shows the main frame of an embodiment of the present invention. FIG. 2 shows a connecting structure between a floating flange and a cylindrical container according to an embodiment of the present invention. FIGS. 3A and 3B are a front view and a side view of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Fixed flange part, 2... Floating flange part, 3... Beam, 4... Frame guide, 5...
...Frame spacer, 6...Vibration isolator, 7...Waterproof connector, 101...Cylindrical body container, 102...Cylindrical body container flange, 103...O ring, 104
...backup spring, 105...gasket.

Claims (1)

[Claims] 1. A cylindrical container equipped with a flange corresponding to the fixed flange part and a flange corresponding to the floating flange part is placed over the main frame in which the fixed flange part and the floating flange part are fixed with a plurality of beams, and the fixed flange part On the other hand, one flange of the cylindrical container is sealed and fixed, an O-ring is inserted between the outer circumferential surface of the floating flange portion and a step formed on the inner circumferential surface of the flange of the cylindrical container, and the step is further inserted into the step. A pressure-tight sealed cylindrical container, characterized in that a back-up spring is inserted and the back-up spring is tightened on the side of the cylindrical container.