Connecting method of lengthened 10kV thermal shrinkable three-core cross-linked polyethylene cable intermediate joint
A technology of cable intermediate joint and cross-linked polyethylene, which is applied in cable joints and other directions, can solve the problems of insulation layer burning, increase workload and working time, loss expansion, etc., and achieve the goal of reducing cost, workload and working time. Effect
Active Publication Date: 2014-11-26
齐齐哈尔电业局 +1
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Problems solved by technology
[0002] With the development of the city, there are more construction operations. The excavation of large machinery poses a great threat to the safe operation of underground cable lines. Cables are often damaged by external forces. Especially in recent years, due to the increase in cable lines, the cable accident rate has also continued to increase. After the XLPE cable is damaged by external force, it is necessary to install an intermediate joint for connection. Generally, the distance between the broken ends can be connected with a standard joint within the range of 10mm. Burning damage makes the distance between the two ends of the broken part of the cable exceed 10mm, up to 200mm. It cannot be connected directly. A section of cable must be cut off, and another section of cable should be placed in the middle to make two standard joints for connection, which increases the cost of handling accidents. The workload and working hours are increased, and the loss is enlarged
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[0016] see Figure 1 to Figure 4 , the connection method of the intermediate joint of the extended 10kV heat-shrinkable three-core XLPE cable, the method is: 1. Preparation work: observe and judge the burning of the broken end of the cable, measure the actual distance between the two broken ends that need to be connected, if If the broken end distance is between 10 and 200mm, it can be cut to a broken end distance of 200mm according to the actual burning situation, and one end is determined to measure a=700mm for the long end, and the other end is measured for the short end to measure b=600mm . 2. Stripping the outer sheath 5 and armor layer 6: peel off the outer sheath at both ends according to the size, tie the armor with a distance of c=50mm from the fracture with copper binding wires, and peel off the remaining armor layer 6 (saw off the armor Can not injure inner sheath 7) during layer 6). 3. Peel off the inner sheath 7 and filler: keep d=20mm inner sheath 7 and remove ...
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The invention discloses a connecting method of a lengthened 10kV thermal shrinkable three-core cross-linked polyethylene cable intermediate joint. The method comprises the following steps of: I, preparing; II, peeling an outer jacket and an armor layer; III, peeling an inner jacket and a filler; IV, manufacturing a lengthened intermediate joint; V, peeling a copper shielding layer and an outer semiconducting layer; VI, fixing a stress tube; VII, sleeving a tubular product; VIII, pressing each phase line connecting tube; IX, winding a semiconducting belt; X, wrapping filling glue; XI, fixing a semiconducting insulating compound tube; XII, wrapping water-proof glue; XIII, wrapping a semiconducting belt; XIV, installing a copper shielding screen and a ground wire; and XV, fixing a sealed protecting tube. After a 10kV thermal shrinkable three-core cross-linked polyethylene cable circuit is damaged by pressing, the general end breaking distance is 10-200 millimeters, broken ends below 200 millimeters are broken into broken ends of 200 millimeters, each core is connected at one time by using a home-made lengthened intermediate joint, and the electric performance fully meets the technical standard requirement.
Description
technical field [0001] The invention relates to a connection method for an intermediate joint, in particular to a connection method for an extended 10kV heat-shrinkable three-core XLPE cable intermediate joint, and belongs to the technical field of the electric power industry. Background technique [0002] With the development of the city, there are more construction operations, and the excavation of large machinery poses a great threat to the safe operation of underground cable lines. Cables are often damaged by external forces. Especially in recent years, due to the increase in cable lines, the cable accident rate has also continued to increase. After the XLPE cable is damaged by external force, it is necessary to install an intermediate joint for connection. Generally, the distance between the broken ends can be connected with a standard joint within the range of 10mm. However, after the cable is damaged by external force, the insulation layer is often Burning damage make...
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IPC IPC(8): H02G15/08
Inventor 李喆孙福东杨铁君赵士鑫杨加
Owner 齐齐哈尔电业局