Valve device for high voltage cable insulator manufacturing

A high-voltage cable, valve device technology, applied in the field of valve devices, to achieve the effects of stable electrical and mechanical properties, reduced time and/or economic costs, and precise opening and closing

Inactive Publication Date: 2013-09-11
PRYSMIAN SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the above, the applicant has solved the problem of devising a solution suitable to ensure that substantially no contamination is mixed with the raw material to be extruded forming the cable insulation, especially in the case of high voltage cables

Method used

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  • Valve device for high voltage cable insulator manufacturing
  • Valve device for high voltage cable insulator manufacturing
  • Valve device for high voltage cable insulator manufacturing

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Experimental program
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Embodiment Construction

[0029] With reference to the accompanying drawings, especially figure 1 , which schematically shows an extrusion device according to an embodiment of the invention, which is specifically designed for forming cable insulation, especially for high voltage cables.

[0030] The extrusion device comprises an extruder feed device 100 for supplying the raw material to be extruded to an extruder 105; more particularly, in the envisaged scenario, the feed device 100 is adapted to feed pellets of thermoplastic material to An extruder 105 which, by extrusion, allows the central conductor (cable core) of a high-voltage cable (not shown in the drawings) to be covered with an insulating coating as a cable insulation of the high-voltage cable.

[0031] The extruder 105 is a well known machine and is widely used in the art, therefore it is only schematically depicted in the figures. Basically, once the thermoplastic material pellets are fed to the extruder 105, the pellets are in frictional ...

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PUM

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Abstract

A valve device (120) is proposed for use in feeding apparatus releasing raw material into a raw material processing machinery (105) for the manufacturing of high- voltage cable. In the solution according to embodiments of the present invention, the valve device includes a valve body (205) comprising a first valve member (220) having a conical shape and including at least one opening (230) extending between a tip of the first valve member and a corresponding base portion (210b) of the first valve member, and a second valve member (225) including at least one cover element (245); one of said valve member (220, 225) is rotatable with respect to the other valve member (225, 220) between a first operating position in which the at least one cover element (245) uncovers the at least one opening (230), thereby allowing the raw material to flow through the valve device, and a second operating position in which the at least one cover element (245) covers the at least one opening (230), thereby preventing raw material from flowing through the valve device.

Description

technical field [0001] The present invention generally relates to the field of high voltage cable manufacturing. More specifically, the present invention relates to a valve device particularly suitable for use in a feed device for feeding a product, such as pellets of polymeric compounds, to an extruder performing insulation of high-voltage cables. Background technique [0002] Cable manufacturing, especially the manufacture of high-voltage cables (for example, high-voltage power distribution cables operating in the voltage range of 20kV to 500kV), usually requires that the central conductor of the cable is completely coated with a uniform insulating material (hereinafter referred to as cable insulation) Covering, the coating is able to electrically insulate the central conductor and prevent any possible dangerous discharges to the surrounding environment. [0003] As is well known in the art, during the manufacture of high voltage cables, the step of covering the central c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K11/072F16K11/083
CPCF16K11/072F16K11/083B29C48/154B29C48/2552B29C48/2567B29C48/503B29C48/286B65D83/06F16K3/30
Inventor W·卡斯蒂廖尼
Owner PRYSMIAN SPA
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