Thermoplastic material solid-sealed polar pole with voltage class of 35kV and above and preparation method thereof

Abstract

The invention discloses a thermoplastic material solid-sealed polar pole with voltage class of 35kV and above and a manufacturing method thereof. The solid-sealed polar pole comprises a vacuum arc-extinguishing chamber, the vacuum arc-extinguishing chamber comprises a ceramic insulator, the upper part of the ceramic insulator is provided with a stainless steel cover plate 1, and the lower part ofthe ceramic insulator is provided with a stainless steel cover plate 2; an upper outgoing line metal insert is arranged at the upper part of the stainless steel cover plate, a thermoplastic shell is arranged outside the vacuum arc-extinguishing chamber, and the vacuum arc-extinguishing chamber is characterized in that a protective layer 1 is arranged at the outer side of the joint of the stainlesssteel cover plate 1 and the ceramic insulator, so that the stainless steel cover plate 1 is isolated from the thermoplastic shell. The solid-sealed polar pole provided by the invention has a good electrical insulation characteristic, and the electrical safety margin of the whole product is effectively improved.

Description

technical field [0001] The invention discloses a thermoplastic material solid-seal pole for voltage levels of 35kV and above and a preparation method thereof, belonging to the technical field of high-voltage insulation and solid insulation material preparation technology. Background technique [0002] The solid-sealed pole is a product formed by covering the vacuum interrupter with high-molecular polymer materials. The shell formed by the polymer plays the role of insulation protection and mechanical support. At present, most of the polymer materials used to prepare embedded poles are epoxy resins. In recent years, considering factors such as energy saving, environmental protection, and recycling, new types of embedded pole products made of thermoplastic materials have emerged. However, the current commercialized thermoplastic The material-embedded pole is still limited to the voltage level of 12 kV. [0003] Thermoplastic materials for the preparation of embedded pole prod...

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Problems solved by technology

[0004] At present, this type of product has only been commercialized at the 12kV level. At higher voltage levels, such as 35kV and above, it has not yet been commercialized, mainly because of the limitations of the preparation process technology and material technology, such as the pressure of injection molding. It has reached more than 50 times that of the pressure gel forming process, which makes the weak part of the vacuum interrupter unbearable and deformed. Therefore, in practice, the weak part of the vacuum interrupter cannot be completely wrapped in insulating materials. 12kV grade products There are also weak parts, but because the 12kV voltage level is low, there is no risk of discharge in actual operation, and there is a risk of discharge

In addition, the molding of thermoplastic materials is actually a cooling and solidification process of molten fluid. The time of this process is much shorter than that of thermosetting materials. Holes and other defects

The above reasons all limit the application of thermoplastic material immobilization technology in higher voltage products

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