A kind of waterproof method of cold shrinkable cable intermediate joint

Abstract

A method for waterproofing the intermediate joints of cold-shrinkable cables. In order to overcome the problem that radial water seepage is likely to occur when making intermediate joints for cold-shrinkable cables at the present stage, the present invention proposes a method for waterproofing intermediate joints for cold-shrinkable cables, which mainly includes the following steps: 1. Strip and cut off the cable outer sheath, steel armor, inner sheath, and copper shielding layer one by one, 2. Insert the intermediate joint and shielded copper mesh, 3. Crimp the connecting pipe, 4. Shrink the intermediate head, 5. Install the copper Shielding net and ground wire, 6. Make a new inner sheath, connect the ground wires at both ends and wind waterproof tape, 7. Install the armored tape, which is characterized in that: Step 6 includes the following steps: A. Winding with PVC tape, B. Apply sealant axially to the ports of the inner sheath at both ends of the cable cutout, C. Sleeve an integral waterproof bag (specially made reinforced PVC film) at the cable joint and attach the two ports of the waterproof PVC bag to the sealant , D. again in the integral waterproof PVC bag and wind the waterproof tape outside, E. connect the ground wires at both ends and wind the waterproof tape again, the waterproof performance of the intermediate joint made by the present invention is further strengthened, and the reliability of the use of the cable is improved.

Description

technical field [0001] The invention relates to a waterproof method for a cable joint, in particular to a waterproof method for an intermediate joint of a cold-shrinkable cable. Background technique [0002] At present, the waterproofing of the intermediate joints of cold-shrinkable cables includes the following steps: 1. Strip and cut off the outer sheath, steel armor, inner sheath, and copper shielding layer one by one; 2. Insert the intermediate joint and shielded copper mesh; Connect the connecting pipe, 4. Shrink the middle head, 5. Install the copper shielding net and ground wire, 6. Wrap the PVC tape and wind the waterproof tape on the outer layer to make a new inner sheath, connect the ground wires at both ends and wind the waterproof tape, 7. Install the armor tape; the problem is that the new inner sheath made by wrapping the PVC tape and wrapping the waterproof tape on the outer layer in the 6th step, since the PVC winding tape and the waterproof tape are wound by...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problems that radial water seepage is easy to occur when making the new inner sheath of the cold-shrinkable cable intermediate joint at the present stage, and the interface creepage between the cable insulation layer and the cold-shrinkable cable intermediate joint is prone to occur, thereby affecting the normal use of the cable. The present invention proposes a A waterproof method for the middle joint of a cold-shrinkable cable. Its technical proposal is that when making a new inner sheath, in addition to first wrapping it with a PVC tape, an integral waterproof PVC bag (specially reinforced film) and seal the two ports of the waterproof PVC bag with the original inner sheath with sealant, and finally wind the waterproof tape outside the integral waterproof PVC bag

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