Low smoke zero halogen (LSZH) insulation and extrusion soft copper bar and manufacturing method thereof

Abstract

The invention relates to a low smoke zero halogen (LSZH) insulation and extrusion soft copper bar and a manufacturing method thereof, and belongs to the technical field of copper bar manufacturing. The technical scheme is as follows: a copper product is extruded into strip copper bars through a copper product continuous extruding machine; a mold made of cobalt-base alloy is used by the copper product continuous extruding machine to continuously extrude and anneal the copper product; an LSZH insulation layer is made of LSZH insulation material, and the LSZH insulation material is tightly extruded and wrapped on the strip copper bars in a cable insulation and extrusion manner through a rectangular drawing pipe mould; and the area of the rectangular cross section of the rectangular drawing pipe mould is matched with the sectional areas of the strip copper bars. The LSZH insulation and extrusion soft copper bar has the beneficial effects that the copper bar is good in foldable bendability, and has the characteristics of being high in pressure resistance and good in protection property; the copper bar is insulated for protection, a heat shrink tube is unnecessary when the copper bar is in use, the copper bar is convenient to construct, small in smoke amount and free of halogen during LSZH insulation combustion, and no cold pasting or cracking can be caused at a high temperature.

Description

technical field [0001] The invention relates to a low-smoke and halogen-free insulated extruded soft copper bar and a manufacturing method thereof, belonging to the technical field of high-voltage copper bar manufacturing. Background technique [0002] Copper bar is a high-current conductive product, which is suitable for electrical engineering such as high and low voltage electrical appliances, switch contacts, power distribution equipment, and busway. Because the cross-sectional area of ​​the copper busbar is larger than that of the cable, the heat dissipation effect is better, so the large current load or power supply is generally connected by the copper busbar. Due to the high current of the copper bars, corresponding protection is usually required when used indoors. However, the copper bars in the background technology generally use bare copper bars or heat-shrinkable tubes on the copper bars, which cannot be well insulated and protected. There are the following defici...

AI Technical Summary

Problems solved by technology

Due to the high current of the copper bars, corresponding protection is usually required when used indoors. However, the copper bars in the background technology generally use bare copper bars or heat-shrinkable tubes on the copper bars, which cannot be well insulated and protected. There are the following deficiencies in the process: 1. Bare copper bars are exposed in the air, which is likely to cause safety accidents, and the copper material is easy to oxidize and has poor corrosion resistance, which will cause the conductivity of the copper bars to decline; 2. The existing copper bars have poor bending performance. Insulation extrusion cannot be carried out; 3. The existing copper bars are usually covered with heat-shrinkable tubes when using them. When adding heat-shrinkable tubes, heat guns or gas flames are used, which requires manual operation, which is likely to cause uneven heating of the heat-shrinkable tubes and cause heat shrinkage. Air remains inside the tube, which affects the electrical insulation level of the copper bar; 4. Due to the good thermal conductivity of the copper bar metal, there will be a cold phenomenon during the shrinkage process of the heat shrinkable tube, and when the copper bar is short-circuited, the temperature of the copper bar will rise. 5. The existing heat-shrinkable tube protection of the copper bar can not be constructed in a large length, and the construction is troublesome, and it cannot be used for long-distance power transmission and distribution

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