JPS59226612A - Cable connection unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a cable connection part suitable for use under high pressure.

(b) Conventional technology For example, in cable connections used in places where the external pressure is higher than atmospheric pressure, such as underwater cable connectors, the joining surfaces of connector fittings, protective cases, etc. are Must be sealed airtight. FIG. 1 prevents water from entering the conventional submersible connector 6.6 connection.

2) Problems to be solved by the invention As described above, ensuring airtightness at cable connections is
It is common to use an 0 ring, but
A seal using an O-ring has a large internal and external pressure difference of 200 ta, and therefore, when the pressure difference exceeds 200 kfI/d, a complicated and technically difficult airtight structure is required.

In addition, since the main body must withstand ultra-high pressure, special and expensive materials with high tensile strength are required for the metal fittings and case, and the walls also need to be thick, which is extremely disadvantageous economically. , the weight of the connection part also increases.

This invention provides a highly reliable cable connection that has a simple structure and can withstand use under ultra-high pressure, and this connection is filled with insulating oil. A protective case is provided with a sliding window that communicates between the inside and outside, and the window is hermetically sealed with a variable membrane, and the deformation of the variable membrane is used to balance the pressure inside and outside the connection. This figure shows an example of application to an underwater connector.
A protective case 1 in which the attached male terminal 11 and one end are airtightly supported on the insulation coating of the cable 1 via a backing 12
3, a cylindrical insulating spacer 14 inserted into the opening of the case to seal the opening, support the terminal 11, and reduce the volume of the internal space of the case, and a variable membrane 15 attached to the outer periphery of the case 13; It consists of a second protective case 16 with a large number of through-holes that prevent the variable membrane from coming into contact with external objects, and a cap nut 17 that connects the protective case 13 to the female connector. The remaining space is filled with insulating oil.

Further, as can be seen from FIG. 3, the protective case 13 is provided with one or more windows 13a in the circumferential direction, and these windows are provided at both ends of, for example, an annular elastic pus made of rubber or an annular membrane with a bellows structure. It is hermetically sealed by the variable membrane 15 to which a supporting metal fitting is attached. Therefore, while internal insulating oil may leak from the window, the structure of the female connector 20 is almost the same as that of the male connector except for the shapes of the joints and terminals. That is, a female terminal 21 attached to the conductor tip of the cable 1', a protective case 23 attached to the cable sheath via a backing 22, an insulating spacer 24 filling the internal space, and a window 23a provided in the protective case. It consists of a variable membrane 25 that seals airtightly, a second protective case 26 made of a small through-hole material that protects this membrane, and an O-ring 27 that fits into a groove on the front surface of the case 23 to seal the joint interface with the case 13.
Inside the protective case 23, there is also insulating oil 1 at the same pressure as atmospheric pressure.
The days are filled.

The male and female connectors made up of the above are connected in the atmosphere, but when submerged in water, external pressure acts on the outer surface of the variable-travel membrane described above. For example, when the water pressure becomes 10 KV//,
In order to balance the insulating pressure by deforming the variable membranes 15, 2i'i inward, a part of the internal space of the protective case 13.23 is used as an extension of the insulating spacer 14.24 (the edge spacer is used to seal the opening of the case and connect the terminals). The extension part can be omitted while leaving a thick part for support.

Furthermore, the second protective case IFi, 26 is not an essential requirement of the invention, and the invention also applies to connections that permanently connect cables in addition to connectors. In that case, if an axial through hole is provided in the insulating spacer attached to the outer periphery of the conductor connection part, one of the windows and the variable membrane shown in the embodiment can be omitted.

(F) Effects As explained above, this invention eliminates the pressure difference between the inside and outside by deforming the variable membrane that seals the window of the protective case. It can be expected to have great effects when used in cable connections used under ultra-high pressures.

(7) The cross-sectional view and FIG. 2 show an embodiment of the connection part of the present invention as shown in "Connector, 11.21... Terminal, 12.22... Backing, 13.23... Protective case, 13a , 23a・
・・Window, 14.24・・Insulation spacer, 15.25・
...Variable membrane, 16.26...Second protective case, 17
...Bag nut, 27...0 ring, 18...Insulating oil.

Patent applicant: Director of the Agency of Industrial Science and Technology Hirobe Yoda (8) Figure 1

Claims (1)

[Scope of Claims] (1) In the cable connection part where the inside of the protective case is filled with insulating oil, the protective case is provided with a window that communicates between the inside and outside, and the window is hermetically sealed by a variable membrane, and the variable membrane The cable connection portion according to claim (1) or (2), characterized in that the internal and external pressure is completely filled by deformation of the cable. (4) The above connection part consists of a combination of male and female connectors, and the protective cases of both connectors are each provided with a window and a variable membrane that seals the window.