JPH07131922A - Connection of aluminum coated oil-filled cable and formation thereof - Google Patents

Abstract

PURPOSE:To make it unnecessary to use fire in forming a connection to eliminate adverse effect on of heat on cable insulator, and eliminate skill in the operation, by superposing the end of a cable aluminum coating on that of a connection aluminum tube, and bonding them together with oil surface adhesive. CONSTITUTION:An appropriate length of the length of the end 12 of a cable aluminum coating 10 is flattened, and formed into a trumpet-shape with its end slightly open. An appropriate length of the end 22 of a connection aluminum tube 20 is also flattened. Oil surface adhesive 50 is applied to the opposite surfaces of the flattened ends 12, 22. Then the end 22 of the connection aluminum tube 20 is squeezed using an aluminum coating squeezing tool to bring it into tight contact with the end 12 of the cable aluminum coating 10. The oil surface adhesive 50 is cured by heating as required. Since the ends 12, 22 are thus bonded together with the oil surface adhesive 50, oil sticking to the surfaces of the ends 12, 22, if any, is stopped. Thereafter, cold welding agent 52 is applied to the area between the end 24 of the connection tube 20 and the cable aluminum coating 10 to perfect the bond.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection part of aluminum OF cable having the same diameter or a quasi-same diameter and a method of forming the same, and more particularly to a sealing technique at a connection part between an aluminum cover of a cable and an aluminum pipe of the connection part. Is.

[0002]

2. Description of the Related Art A conventional seal at a connecting portion between a cable aluminum sheath and a connecting portion aluminum pipe is as follows: (1) As shown schematically in FIG. Between the lead wire and the lead wire (30 indicates the lead wire portion), or (2) or by welding as shown in FIG. 3 as a model (40 indicates the welded portion).

[0003]

However, (1) The above-mentioned lead method requires a fire such as a burner, the outer diameter becomes large, a certain degree of skill is required, and the cable insulator may be thermally adversely affected. There is such a problem.

(2) Further, the above welding method requires protection against arc light during welding, requires skill, may have a bad thermal effect on the cable insulator, and requires reinforcement near the welded portion (welding heat). Therefore, there is a problem such as a change in the aluminum structure) and the need to devise an oil stop (welding is difficult even if a small amount of oil adheres).

[0005]

As shown in FIG. 1, (1) the end portion 12 of the cable aluminum sheath 10 and the end portion 22 of the connecting portion aluminum pipe 20 are overlapped with each other, and an oil surface is bonded between them. Bond with the agent 50. (2) Further, the tip end portion 24 of the connecting portion aluminum pipe 20 and the cable aluminum sheath 10 are bonded by the cold welding agent 52 or the adhesive agent. (3) The above (1) and (2) are used together.

(4) The end portion 12 of the cable aluminum sheath 10 and the end portion 22 of the connecting portion aluminum pipe 20 are flattened by appropriate lengths respectively, and the flattened end portions 12 and 22 are adhered to the opposite surfaces with an oil surface. After the agent 50 is applied and superposed, the end portion 22 of the connecting portion aluminum pipe 20 is contracted and brought into close contact with the cable aluminum cover 10, and after the oil surface adhesive 50 is cured, the connecting portion aluminum pipe 20 Tip 24 and the cable aluminum cover 1
0 and 0 are adhered to each other by a cold welding agent 52 or an adhesive to form a connection portion of the aluminum-covered OF cable.

[0007]

[More detailed description] (1) The end portion 12 of the cable aluminum jacket 10 is flattened (eliminating the corrugation) and shaped like a trumpet with a slightly open tip. (2) The appropriate length of the end portion 22 of the connection aluminum tube 20 is also flattened. (3) On the facing surfaces of the flattened end portions 12 and 22,
The oil surface adhesive 50 is applied.

[0008] The oil surface adhesive, when applied to the base surface to which the oil is attached, absorbs and diffuses the oil into the adhesive and maintains a high adhesive strength, and is also called an oil absorbing adhesive.
Examples of the oil surface adhesive include an Epokin resin type (for example, trade name Hammatite ES series) and a modified acrylic resin type (for example, trade name Cemedine SGA). Further, among these, there are a heat-curable type which is heated to about 120 to 150 ° C and a room temperature-curable type. (4) Next, use a known aluminum draw tool to connect the aluminum pipe 2
The end portion 22 of 0 is contracted to be brought into close contact with the end portion 12 of the cable aluminum sheath 10 and heated as necessary to heat the oil surface adhesive 50.
Cure. Then, even if oil adheres to the surfaces of the end 12 and the end 22, the oil surface adhesive 50 adheres between them and the oil is stopped.

(5) After that, between the tip end portion 24 of the connection aluminum pipe 20 and the cable aluminum sheath 10, the cold welding agent 5 is applied.
Apply 2 to make the bond more complete. Cold welding agents include belometal, whose main component is alumina, and Devcon (trade name). Note that an adhesive for aluminum can be used instead of the cold welding agent 52. Reference numeral 60 in FIG. 1 is a cable core.

[0010]

(1) Operation and effect of the invention (1) Since the end of the cable aluminum cover and the end of the connecting part aluminum pipe are overlapped and the space between them is adhered by the oil surface adhesive, the cable aluminum cover is connected. Mechanical connection with the aluminum tube
Oil leakage is prevented. (2) The end portion of the cable aluminum sheath and the end portion of the connection aluminum pipe are overlapped with each other, and the tip portion of the connection aluminum pipe and the cable aluminum sheath are bonded by a cold welding agent or an adhesive. Therefore, the gap between the cable aluminum cover and the connecting portion aluminum pipe is sealed. (3) The end portion of the cable aluminum cover and the end portion of the connecting portion aluminum pipe are overlapped with each other and bonded between them with an oil surface adhesive, and the end portion of the connecting portion aluminum pipe and the cable aluminum If the cover and the cover are bonded with cold welding or adhesive, the cable aluminum cover and the connecting part aluminum pipe will be double-sealed, and the seal will be more reliable. .

(4) The end of the aluminum cover of the corrugated cable and the end of the aluminum pipe of the corrugated connection part are flattened by appropriate lengths, and an oil surface adhesive is applied to the opposing surfaces of the flattened portion. Then, the ends of the aluminum pipes of the connecting portion are contracted to be closely adhered to the aluminum cover of the cable, and after the oil surface adhesive is hardened, the tip of the aluminum pipe of the connecting portion and the aluminum cover of the cable are covered. Between the and, because it is bonded by a cold welding agent or an adhesive, 1) completely oil-stop, between the tip of the connection aluminum tube and the cable aluminum cover,
It can be adhered by cold welding or adhesive. 2) No fire is required for forming the connection part, 3) No thermal adverse effect on the cable insulator, and 4) No embrittlement of the aluminum cover due to heating. (3) In addition, the increase in outer diameter is slight, and no skill is required for work.

[Brief description of drawings]

FIG. 1 is an explanatory view of an embodiment of the present invention,

FIG. 2 is a schematic explanatory view of a conventional technique.

FIG. 3 is a schematic explanatory view of another conventional technique.

[Explanation of symbols]

 10 Cable Aluminum Cover 12 End 20 Connection Aluminum Tube 22 End 24 Tip 30 Lead Working 40 Welding 50 Oil Surface Adhesive 52 Cold Welding 60 Cable Core

Claims (4)

[Claims] 1. A connection portion of an aluminum-covered OF cable in which an end portion of a cable aluminum sheath and an end portion of a connection portion aluminum pipe are overlapped with each other and bonded between them with an oil surface adhesive. 2. An end portion of the cable aluminum sheath and an end portion of the connection aluminum pipe are overlapped with each other, and a cold welding agent or an adhesive agent is used between the tip portion of the connection aluminum pipe and the cable aluminum sheath. The connection part of the aluminum-covered OF cable that is adhered. 3. An end portion of the cable aluminum cover and an end portion of the connecting portion aluminum pipe are overlapped with each other and bonded between them with an oil surface adhesive, and the leading end portion of the connecting portion aluminum pipe and the above A connection portion of an aluminum-covered OF cable in which the cable and the aluminum cover are bonded with a cold welding agent or an adhesive. 4. The aluminum end of the corrugated cable aluminum cover and the end of the corrugated connection aluminum pipe are flattened by appropriate lengths, and an oil surface adhesive is applied to the opposing surfaces of the flattened portion. After that, the end portion of the connecting portion aluminum pipe is contracted to be closely adhered to the cable aluminum cover, and after the oil surface adhesive is cured, the tip portion of the connecting portion aluminum pipe and the cable aluminum cover are A method for forming a connecting portion of an aluminum-covered OF cable, in which the gaps are bonded by a cold welding agent or an adhesive.