Shielding cylinder and its manufacturing process

Abstract

The invention discloses a shield cylinder and a production process thereof. The shield cylinder comprises a polytetrafluoroethylene tube body, a plurality of insulation shielding layers and an outer sheath layer which are orderly wrapped at the outside of the tube body; each insulation shielding layer comprises an insulation layer and a shielding layer which are orderly connected with each other; at the joint of each insulation shielding layer and the polytetrafluoroethylene tube body, reserved sections with the same length L are reserved at the two ends of each insulation shielding layer in an outward direction; and besides, the shielding layer closest to the outer sheath layer is a grounded shielding layer, and the grounded shielding layer comprises an aluminum foil layer or a braided copper mesh layer. Moreover, when the insulation shielding layers of the shield cylinder are produced, the reserved sections with the same length are respectively reserved at the two ends of the polytetrafluoroethylene tube body, and finally, a step-like insulation shielding part is formed at the inside of the polytetrafluoroethylene tube body, so that the insulating performance of the shield cylinder is improved, thus a bus-bar protected by the shield cylinder is not subject to environmental interference, the security and reliability are high, the bus-bar can be guaranteed to have a better technological property during production, and the production cost can be guaranteed to be relatively low.

Description

technical field [0001] The invention relates to the technical field of insulation protection for power transmission and distribution conductive devices, in particular to a manufacturing process of a shielding cylinder. Background technique [0002] The shielding tube is an insulation protection device mainly used in the joint of the two-section busbar of the composite shielding insulated copper tube busbar. Its external insulation protection plays a vital role in the safe and reliable operation of the power transmission and distribution system and power equipment. Its It is an indispensable component for the normal operation of the product, avoiding short circuit between phases, and insulation protection. [0003] This technology was first applied to foreign projects by foreign companies, such as Swiss MGC Company, German BPB Company, etc., and was later introduced in China. However, the product structure of foreign companies and domestic companies is quite different. The co...

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Problems solved by technology

[0003] This technology was first applied to foreign projects by foreign companies, such as Swiss MGC Company, German BPB Company, etc., and was later introduced in China. However, the product structure of foreign companies and domestic companies is quite different. The connection between two sections of busbars in foreign companies mainly uses On-site pouring of resin on site, the operation is difficult, and the labor cost is high, which increases the cost of the busbar, which is expensive and cannot adapt to the domestic market

Finally, domestic busbars mainly use two layers of PVC or PE heat-shrinkable sleeves or wrap the joints with insulating materials at the installation site to protect the connection of the two sections of busbars. However, the humidity and temperature of the surrounding environment at the installation site are not high. It may meet the requirements, and even impurities may be brought in during manual wrapping, which greatly reduces the electrical insulation performance of the tube mother, resulting in a greater safety hazard in the normal operation of the busbar system

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