EP0821373B1 - Isolateur composite en matière plastique avec jupe en spirale et procédé de fabrication - Google Patents

Isolateur composite en matière plastique avec jupe en spirale et procédé de fabrication Download PDF

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Publication number
EP0821373B1
EP0821373B1 EP97112500A EP97112500A EP0821373B1 EP 0821373 B1 EP0821373 B1 EP 0821373B1 EP 97112500 A EP97112500 A EP 97112500A EP 97112500 A EP97112500 A EP 97112500A EP 0821373 B1 EP0821373 B1 EP 0821373B1
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EP
European Patent Office
Prior art keywords
composite insulator
plastics
insulator according
core
plastics composite
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97112500A
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German (de)
English (en)
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EP0821373A1 (fr
Inventor
Heinz Denndörfer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LIW Composite GmbH
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Lapp Insulator GmbH
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Publication of EP0821373A1 publication Critical patent/EP0821373A1/fr
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/32—Single insulators consisting of two or more dissimilar insulating bodies
    • H01B17/325—Single insulators consisting of two or more dissimilar insulating bodies comprising a fibre-reinforced insulating core member
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies

Definitions

  • the invention relates to a plastic composite insulator, the trunk of which fiber-reinforced plastic core and around this core the jacket of a Contains umbrella cover, the umbrella cover from the jacket and at least a screen running spirally around the trunk is formed.
  • High voltage insulators for overhead lines have been out for a long time ceramic, electrically insulating materials such as porcelain or glass manufactured.
  • isolators gain a soul from a fiber and Plastic composite material and a plastic cover contain increasing importance because they are characterized by a number of Characterize advantages, in addition to a lower weight improved mechanical resistance to projectiles Firearms count.
  • the shield covers of such composite insulators are included usually with a larger number approximately perpendicular to the trunk running, plate-shaped umbrellas.
  • Composite insulators have compared to conventional insulators made of glass or Porcelain the advantage that they have excellent insulation properties when Use in areas with heavily polluted atmospheres as they are largely dirt-repellent and sometimes also dirt encapsulating isolating. That is why composite insulators are used Umbrellas made of silicone rubber are increasingly used to existing Overhead lines with electrical insulation problems arising from atmospheric Impurities result in toughening up by using the conventional Porcelain or glass insulators against composite insulators with a Screen cover made of silicone rubber replaced.
  • high-voltage insulators are used in composite construction used with plate-shaped screens, especially for overhead lines.
  • the joint between the cladding enveloping the fiberglass core, i.e. the The surface of the trunk and the recess in the plate-shaped shades this is a potential fault if the production process is not certain is mastered and the joints are not closed tightly.
  • DE-A1-42 02 653 teaches a method for producing a composite insulator by injection molding an umbrella sleeve around a core to create gaps between the Avoid coat and the plate-shaped shades of an umbrella cover, and a device for injection molding these insulators.
  • High-voltage insulators are known which have spiral shields: SU 659382 describes a method for producing a Porcelain high-voltage insulator, made with the help of an extruder rotating disc, which contains an opening for the ceramic mass spiral ribs are formed; Details of the rotating disc are not specified.
  • CH-A5-640 666 teaches a composite insulator spiral umbrellas, in which a prefabricated rib-shaped Elastomer profile tape is wound around a GRP core and vulcanized.
  • CA-A1-2,046,682 a similar rib-shaped elastomer profile tape is intended with a parallelogram cross section for the jacket around one insulating core such as a GRP pipe is wound and vulcanized.
  • EP-B1-0 161 265 a thin, screen-forming, helical silicone rubber band formed on a plate, lifted off and wrapped around a GRP core and glued;
  • This method has some shortcomings: it is not possible due to the manufacturing process apply the shielding tape so that no shielding deformation occurs.
  • the nylon thread in the area of the umbrella root is not capable of this problem solve, because this thread rather leads to destructive glow discharges can come in the thread / screen interface.
  • the adhesive for attaching the Shielding tape on the GFK core also serves, according to the patent specification, for the GFK core in to protect the spaces between the screens; this extremely thin layer seems but not being able to offer secure protection, especially not when Occurrence of partial electric arcs on the insulator surface. Which the short adhesive joint resulting from the small screen thickness is also one Weak point because it is very vulnerable to breakdown.
  • a plastic composite insulator is known according to the preamble of claim 1 following procedure is produced.
  • a split block made of resin drilled a hole with a twist drill and at the same time the contour of the spiral umbrella cut into the block.
  • the core of the one to be manufactured is centered in the hole in the vertically positioned block
  • Insulator made of fiber composite material and the remaining cavity around the core and the contour of the spiral screen are filled with silicone. After this When the silicone cools, the slit mold is opened and the insulator taken. The two-part form creates where the Separation points run on the opposite sides of the insulator Longitudinal seams.
  • US Pat. No. 3,685,147 describes a method for producing a coaxial cable known with the dielectric air. To the distance to the tubular To produce outer conductors, the central conductor is made with a spiral Spacers overmolded.
  • the invention was therefore based on the object of composite insulators higher functional reliability and better electrical characteristics as well at the same time a cheaper alternative to the production of such To provide composite insulators.
  • a Plastic composite insulator containing a trunk and at least one shield and caps, in which the trunk has a fiber-reinforced plastic core and around this core contains a jacket of an umbrella cover and in which the Umbrella cover made of the coat and at least one spiral around the trunk current screen is formed, characterized in that the Umbrella cover is formed in one piece and without joints and that they have a smooth surface without longitudinal seams and without Has cross seams.
  • the object is also achieved according to the invention by two methods for Production of such a plastic composite insulator in conjunction with the associated devices.
  • the plastic core of the composite insulators according to the invention can be made with fibers be reinforced from a low-alkali glass. In particular, it can be cylindrical, be bulged or conical and thus gives the basic shape of the trunk.
  • the plastic core can be a solid rod or a hollow body be, preferably in the form of a tube or a hollow cone.
  • a silicone rubber is preferably used as the material for the shield cover, whose Shore A hardness is more than 40, in particular 60 to 90.
  • the shield cover can contain rubber, which is used in the case of increased Temperature - usually 50 ° C to 200 ° C - is vulcanizable, in particular EPDM (terpolymer of ethylene, propylene and a diene with which unsaturated part of the diene on the side chain) or / and EPM (ethylene-propylene copolymer), Polyvinyldimethylsiloxane and fillers, preferably with Cross-linked with the help of peroxides, or more generally polyorganodimethylsiloxanes.
  • EPDM terpolymer of ethylene, propylene and a diene with which unsaturated part of the diene on the side chain
  • EPM ethylene-propylene copolymer
  • the shield cover usually has a smooth surface without longitudinal seams and without cross seams. A is particularly smooth due to the low tendency to soiling and preferable to better insulation.
  • the coat is preferably of im essentially of the same thickness or contoured with ribs, grooves or waves - preferably spiraling so that water can drain off well.
  • the top of the spiral-shaped shades is usually shaped convexly the underside of the spiral screens is often concave.
  • the Underside of the spiral shields can be a curl or at least one Have rib or at least one groove that help creep paths too lengthen, stiffen the umbrellas and running water, which is also dirt can transport away, distract.
  • These screen contours can also be radial be routed to the trunk or to the outside. As a rule, they are Transitions between the surface of the screens and the surface of the Sheath rounded or with a very small distance between two screens from one screen continuously rounded to the next screen.
  • the tendon of the Top of the shields cutting in the longitudinal direction of the insulator Cross-sectional area usually makes an angle with the longitudinal direction L. ⁇ from 30 ° to 80 °.
  • the spiral screens can be to the side Caps have outlets in which the projection of the screens usually decreases continuously until it starts to form on the trunk.
  • a exemplary embodiment shows at least one spiral screen, which in middle area of the trunk is interrupted and laterally from this Interruption spouts or in the area of the interruption a reduced Projection.
  • the composite insulator can have at least two spiral Have screens that have a different screen cross-section demonstrate. It can be dense at least in one area of the trunk Sequence of screen sections in longitudinal section - similar to a comb - be equipped. The distance between the screen sections in a longitudinal section can, for example, due to the changed angle of inclination or a larger number of spiral umbrellas, along the length of the trunk vary.
  • the angle of inclination can be so be varied so that a revolution of a spiral screen by 360 ° one Gradient height in the longitudinal direction L from 10 mm to well over 1000 mm equivalent.
  • all spiral screens are formed only at a somewhat greater distance from the cap, on Strunk one or more plate-shaped umbrellas at least at one end molded or applied.
  • the plastic core can have a length of between 10 cm and 8 m and thus prescribes approximately the length of the entire insulator. Except at the ends of the outlets, the spiral-shaped screens can have an outreach perpendicular to the stem from the surface of the jacket of 5 to 100 mm, in particular 10 to 70 mm, particularly preferably 15 to 40 mm.
  • the distance between two screen sections in the longitudinal direction L, measured near the surface of the jacket, can be 5 to 1000 mm, in particular 10 to 500 mm, particularly preferably 20 to 100 mm.
  • the straightness deviation of an essentially straight line on the surface of the shield cover is usually not more than 0.5 mm, preferably not more than 0.3 mm, in particular not more than 0.1 mm.
  • the screen construction according to the invention offers further advantages: Silicone rubber is known to be an expensive material because of the silicone synthesis starting from pure silicon. Isolator constructions with plate-shaped screens made of silicone rubber are therefore geared towards the use of materials minimize, which leads to thin screens. Thin shades made of silicone rubber, in particular those with a larger projection may be mechanically unstable, she tend to deform during storage and transportation and can too easily damaged mechanically.
  • the composite insulators according to the invention have neither joints nor usually seams. At such seams, usually one perpendicular to the A standing skin that runs in the longitudinal direction of the insulator dirt particles can accumulate locally and electrotechnically disruptive.
  • the curved and inclined spiral screens are This is particularly advantageous when it is raining because the rainwater does not follow the spiral runs down, but is deflected outwards due to the shape of the umbrella and drains.
  • the composite insulators according to the invention can be produced using the following methods getting produced:
  • a method according to claim 19 for producing a plastic composite insulator according to one of claims 1 to 18 is thereby characterized in that an adhesive on a fiber-reinforced plastic core is applied that the pretreated plastic core in an extruder or in a piston press that has a quill head with a rotatable one Have mouthpiece is introduced that the transport speed of the Plastic core with the speed of rotation of the rotatable mouthpiece is coupled that the mass for the manufacture of the shield cover around pre-treated plastic core compacted around and by the rotatable Mouthpiece is pressed so that the pretreated plastic core in Longitudinal direction with a one-piece umbrella cover made of jacket and umbrella / umbrellas is provided in the form of one or more spirals.
  • the Plastic core rotating in an extruder or in a piston press be introduced, the transport speed of the plastic core with its rotational speed can be coupled.
  • an adhesive is applied to a fiber-reinforced plastic core, the plastic core thus pretreated in an extruder or in a Piston press, which have a quill head with a mouthpiece, rotating is introduced, the transport speed of the plastic core with its rotational speed is coupled and the mass for producing the Shield cover around the pretreated plastic core compressed and through the mouthpiece opening is pressed so that the pretreated one Plastic core in the longitudinal direction with a one-piece shield cover made of jacket and screen / screens is provided in the form of one or more spirals.
  • the adhesive can be on the plastic core before wrapping Mass can be applied by spraying, spreading or dipping.
  • the Adhesive usually serves as an aid to vulcanization and can be applied Base silane can be used. It can be used as a liquid film of e.g. about 1 ⁇ m Starch can be applied to the plastic core.
  • the processes can be continuous or discontinuous, with constant or changing speed.
  • the speed of the Rotating devices or the transport device can be used within wide limits be varied, however care should be taken to ensure that it is not due to being too high Speed to shear between the coated Plastic core and the rubber mass comes, otherwise otherwise in particular Umbrellas can be torn off.
  • the size can or / and the shape of the mouthpiece opening during extrusion be changed using an extruder or piston press, especially if one suitable means for changing the opening is provided; for example, the spiral shields can be used laterally towards the caps Spouts are pressed.
  • the ends of the spiral screens can, however also bevelled, rounded or to the side towards the caps towards the spouts be processed.
  • the ends of the spiral screens can also simply cut off, with a slight rounding of the edges is advantageous.
  • the quill head is completely and without extrusion Air pockets are filled with mass and the mass for the shield cover without Air pockets are expelled.
  • the manufacturing process for the stalk is in essentially completed in that the plastic core with the Umbrella cover is connected by vulcanization. Vulcanizing can be behind the quill head in a heating section. It should be noted here that the outer area of the plastic core has a sufficient temperature reached for vulcanization.
  • Adhesive can be very conducive to the result of vulcanization because such a chemical connection between the two parts to be vulcanized together without bubbles and without gaps can be.
  • Water can accumulate in bubbles or crevices, resulting in a electrical impairment, primarily due to glow discharges, can lead. Glow discharges can lead to arcing, which can damage the insulator can destroy.
  • the composite insulators of the present invention can be made using the following Devices are manufactured:
  • a device according to claim 28, for producing an inventive Plastic composite insulator according to one of claims 1 to 18 comprises an extruder or a piston press, a quill head, a mouthpiece with opening and a transport device for the plastic core and is characterized in that the mouthpiece is equipped with a rotating device.
  • Another device according to claim 29 for producing a plastic composite insulator according to the invention according to one of claims 1 to 18 contains an extruder or a piston press, a quill head, a mouthpiece with an opening and a transport device for the plastic core, the transport device being equipped with a rotating device for the plastic core is.
  • the mouthpiece can contain a profiled disc, which is spring-mounted, and contains an opening, which is preferably arranged in a profiled disc.
  • the opening can have a circular recess which is arranged centrally to the transport axis of the plastic core and which merges into at least one approximately cone-shaped widening in the radial or angled direction.
  • the opening can have at least one constriction or at least one second extension branching off from this extension in the region of the approximately cone-shaped extension. It can be provided with a device with which the opening can be changed in size and / or shape during operation.
  • the circular recess of the opening can have a diameter which is at least 0.2 mm larger than the diameter of the plastic core at the associated point when being transported through the opening.
  • the profile tool used to shape the shield cover can be so simple to be built on customer requests regarding trunk and umbrella design can be reacted quickly, flexibly and inexpensively and not expensive Tools specifically for a type must be provided.
  • Figure 1 shows a section of an inventive Plastic composite insulator.
  • the middle section of the insulator 1 contains one Strunk 2 and a screen 6 wound spirally around it.
  • the trunk 2 contains a fiber-reinforced plastic core 3 made of epoxy-coated Glass fibers can consist of "endless” and cylindrical cores are arranged axially parallel, and a shield cover 4:
  • the plastic core 3 encased by a seamlessly shaped layer of the jacket 5, which without joints in passes the spiral screen 6.
  • a section of Figure 1 is as Drawn longitudinal section in which the tendon of the top of the screens in Longitudinal direction of the insulator intersecting cross-sectional area with the In the longitudinal direction, an angle ⁇ of 30 ° to 80 °, preferably of 40 ° to 70 °, includes.
  • FIG. 1 shows an example of an insulator according to the invention constant diameters, with a cylindrical stem 2 without a cavity and with a single spiral wound screen 6 of constant Cross-section.
  • several screens can be the same or different cross sections or screens with ribs, grooves or corrugations 14 different orientation and arrangement can be used.
  • Figure 1 also does not show the trunk ends 16 with the outlets 15 of the screens and not the caps that are usually designed as metal fittings.
  • the Caps are used to transfer the tensile force from the plastic core 3 to the Insulator suspension or mounting shown.
  • the cap can e.g. out Steel, cast iron or other metallic materials exist and through radial compression may be connected to the end of the plastic core 3.
  • Figure 2 shows a device 20 for producing the Plastic composite insulator 1 in the area of an extruder 21.
  • the mass 24 for the manufacture of the shield cover 4 is by the extruder 21 in the Quill head 22 promoted.
  • the device for the adhesive order 37, the Transport device 26 for the plastic core 3 with the anti-rotation device 36, the quill head 22 with the rotatable mouthpiece 23 and the heating section 35 for vulcanizing the shield cover are arranged axially that the Plastic core 3 are guided centrally through corresponding recesses can.
  • the mouthpiece 23 is driven by the drive 33 and 34.
  • Figure 3 gives a partial section of the outlet end of the quill head 22 and the rotatable mouthpiece 23 again.
  • the plastic core 3 is guided through a short distance from the sleeve 43 in order to which the mass 24 for the shield cover 4 behind the sleeve 43 and through the Gap 45 of the approximately circular recess 30 between the plastic core 3 and edge of the opening 25 and through the extension 31 and possibly through a second extension 32 pressed and in the form of jacket 5 and spiral screen 6 is formed.
  • the mouthpiece 23 is about that Ball bearing 41 rotatably mounted around the quill head 22.
  • the profile disc 29 with the opening 25 is over with the housing of the rotatable mouthpiece 23 Screws 38 and compression springs 39 connected.
  • the cross section of the opening 25 specifies the cross section of the shield cover 4 formed there.
  • the interior of the Quill head 22 is between the profile plate 29 and the housing of the mouthpiece 23 by a sealing and sliding ring 40, which can advantageously be made of PTFE, sealed.
  • the tightening torque must be the same for all screws 38, so that the pressure on the profile plate and the sealing and sliding ring 40 over the the entire scope is distributed approximately equally.
  • the tightening torque must be like this be high that during operation no mass 24 in the area of the sealing and sliding ring 40 can emerge, but a correct rotation of the mouthpiece 23 is guaranteed.
  • FIG. 4 illustrates different ones on the left with several partial representations Profile disks 29 of a rotatable mouthpiece 23 with different shaped openings 25 having circular recesses 30 which in approximately cone-shaped extensions 31 in the radial or angled direction pass over and be curved or aligned as required can.
  • second extensions 32 can be made from the extensions 31 Branch off to form ribs or corrugations 14.
  • the profile disc 29 can via mounting holes 46 with the housing of the rotatable Mouthpiece 23 are connected.
  • a device that opens the opening 25 is resized and / or reshaped during extrusion not shown here.
  • the change in the opening 25 can be done via the Extrusion time for an insulator should be even, e.g. around the stalk conical, or briefly, e.g.
  • the shape and size of the opening 25 determines the cross section the screen cover 4.
  • the resulting screen cross section 17 is in this plastic, not yet vulcanized material but not with the shape of the Opening 25 identical.
  • This production usually results in more or less inclined and curved spiral screen 6.
  • This screen 6 receives mostly a shape in which it is thicker closer to the trunk 2 and to the edge of the Screen 6 becomes thinner.
  • the change in the speed of rotation can Similar opening 25 to a differently shaped screen cross section 17 to lead.
  • the partial representations 4a to 4d different variants of the Opening 25 and the resulting screen cross sections 17 are shown. With simple means, therefore, the number, size and shape of the spiral Umbrellas 6 are affected.
  • the invention was exemplified above on a high voltage insulator for overhead lines, on the manufacturing process and on the basis of manufacturing required device explained in more detail.
  • a high voltage insulator for overhead lines on the manufacturing process and on the basis of manufacturing required device explained in more detail.
  • composite insulator according to the invention as a high voltage or as a housing for electrical apparatus, in particular in outdoor applications, are used, where the most diverse areas of application come into question.
  • the invention can also be used advantageously in cases where conventional Insulators of a specified height in atmospheric pollution areas cause electrical problems with flashovers. With the help of the invention Insulators can be built whose creepage distance remains the same Height can be adapted to the atmospheric conditions.

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  • Insulators (AREA)
  • Insulating Bodies (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)

Claims (35)

  1. Isolateur composite en matière plastique (1) comprenant un fût (2) et au moins une ailette et des capots, le fût comprenant un noyau (3) en matière plastique renforcée de fibres et autour de ce noyau une chemise (5) d'une enveloppe à ailettes (4), l'enveloppe à ailettes (4) étant formée de la chemise (5) et d'au moins une ailette (6) s'étendant en hélice autour du fût, caractérisé par le fait que l'enveloppe à ailettes (4) est formée d'une seule pièce et sans raccords et qu'elle présente une surface lisse sans joints longitudinaux et sans joints transversaux.
  2. Isolateur composite en matière plastique suivant la revendication 1, caractérisé par le fait que la face supérieure (7) des ailettes (6) en hélice est conformée de façon convexe.
  3. Isolateur composite en matière plastique suivant la revendication 1 ou 2, caractérisé par le fait que la face inférieure (8) des ailettes (6) en hélice est conformée de façon concave.
  4. Isolateur composite en matière plastique suivant l'une des revendications 1 à 3, caractérisé par le fait que la face inférieure (8) des ailettes (6) en hélice présente une ondulation ou au moins une nervure ou au moins une rainure.
  5. Isolateur composite en matière plastique suivant l'une des revendications 1 à 4, caractérisé par le fait que la corde de la surface de section transversale coupant la face supérieure des ailettes dans la direction longitudinale (L) fait un angle α de 30 à 80°.
  6. Isolateur composite en matière plastique suivant l'une des revendications 1 à 5, caractérisé par le fait que le noyau en matière plastique est renforcé de fibres en verre pauvre en éléments alcalins.
  7. Isolateur composite en matière plastique suivant l'une des revendications 1 à 6, caractérisé par le fait que l'enveloppe à ailettes (4) contient du caoutchouc qui est vulcanisable à température accrue.
  8. Isolateur composite en matière plastique suivant l'une des revendications 1 à 7, caractérisé par le fait que les ailettes (6) en hélice présentent des portions (15) à porte-à-faux décroissant latéralement vers des capots.
  9. Isolateur composite en matière plastique suivant l'une des revendications 1 à 8, caractérisé par le fait qu'au moins une ailette (6) en hélice est interrompue dans la partie médiane du fût (2) et présente des portions (15) à porte-à-faux décroissant latéralement par rapport à cette interruption ou un porte-à-faux réduit, (13) dans la zone de cette interruption.
  10. Isolateur composite en matière plastique suivant l'une des revendications 1 à 9, caractérisé par le fait qu'au moins une ailette (6) en hélice présente une section transversale (17) variant sur la longueur.
  11. Isolateur composite en matière plastique suivant l'une des revendications 1 à 10, caractérisé par le fait qu'au moins une ailette (6) en hélice n'est formée qu'à distance accrue d'un capot avec une portion (15) à porte-à-faux décroissant.
  12. Isolateur composite en matière plastique suivant l'une des revendications 1 à 11, caractérisé par le fait qu'il présente au moins deux ailettes (6) en- hélice ayant des sections transversales d'ailettes (17) qui diffèrent.
  13. Isolateur composite en matière plastique suivant l'une des revendications 1 à 12, caractérisé par le fait qu'il comprend au moins dans une zone du fût (2) une succession rapprochée de portions d'ailettes en coupe longitudinale, de façon semblable à un peigne.
  14. Isolateur composite en matière plastique suivant l'une des revendications 1 à 13, caractérisé par le fait qu'au moins une ailette (18) annulaire est formée ou rapportée sur le fût à au moins une extrémité (16) du fût.
  15. Isolateur composite en matière plastique suivant l'une des revendications 1 à 14, caractérisé par le fait que les ailettes (6) en hélice présentent, sauf aux extrémités des portions (15) à porte-à-faux décroissant, un porte-à-faux (13) perpendiculairement au fût (2), à partir de la surface de la chemise (9), qui est compris entre 5 et 100 mm, en particulier entre 10 et 70 mm, de préférence entre 15 et 40 mm.
  16. Isolateur composite en matière plastique suivant l'une des revendications 1 à 15, caractérisé par le fait que la distance (12) entre deux portions d'ailettes, mesurée dans la direction longitudinale à proximité de la surface de la chemise, est comprise entre 5 et 1000 mm, en particulier entre 10 et 500 mm, de préférence entre 20 et 100 mm.
  17. Isolateur composite en matière plastique suivant l'une des revendications 1 à 16, caractérisé par le fait que le noyau en matière plastique est réalisé sous une forme cylindrique, bombée convexe ou conique.
  18. Isolateur composite en matière plastique suivant l'une des revendications 1 à 17, caractérisé par le fait que le noyau en matière plastique est un barreau plein ou un corps creux.
  19. Procédé de fabrication d'un isolateur composite en matière plastique suivant l'une des revendications 1 à 18, caractérisé par le fait qu'un agent d'adhérence est appliqué sur un noyau (3) en matière plastique renforcée de fibres, que le noyau en matière plastique ainsi prétraité est introduit dans une extrudeuse (21) ou une presse à piston présentant un fourreau (22) avec une filière (23) rotative, que la vitesse de transport du noyau en matière plastique est couplée avec la vitesse de rotation de la filière rotative, que la masse (24) pour la réalisation de l'enveloppe à ailettes (4) est comprimée autour du noyau en matière plastique prétraité et est refoulé à travers la filière rotative de manière que le noyau en matière plastique prétraité soit muni en direction longitudinale d'une enveloppe à ailettes d'une seule pièce comprenant une chemise et une ailette/des ailettes sous forme d'une ou de plusieurs hélices.
  20. Procédé de fabrication d'un isolateur composite en matière plastique suivant l'une des revendications 1 à 18, caractérisé par le fait qu'un agent d'adhérence est appliqué sur un noyau (3) en matière plastique renforcée de fibres, que le noyau en matière plastique ainsi prétraité est introduit avec mouvement de rotation dans une extrudeuse (21) ou une presse à piston présentant un fourreau (22) avec une filière (23a), que la vitesse de transport du noyau en matière plastique est couplée avec sa vitesse de rotation, que la masse (24) pour la réalisation de l'enveloppe à ailettes (4) est comprimée autour du noyau en matière plastique prétraité et est refoulé à travers l'ouverture (25) de la filière de manière que le noyau en matière plastique prétraité soit muni en direction longitudinale d'une enveloppe à ailettes d'une seule pièce comprenant une chemise et une ailette/des ailettes sous forme d'une ou de plusieurs hélices.
  21. Procédé de fabrication d'un isolateur composite en matière plastique suivant la revendication 19, caractérisé par le fait que le noyau en matière plastique prétraité est introduit avec mouvement de rotation dans une extrudeuse (21) ou une presse à piston et que la vitesse de transport du noyau en matière plastique est couplée avec sa vitesse de rotation.
  22. Procédé de fabrication d'un isolateur composite en matière plastique suivant la revendication 19 ou 20, caractérisé par le fait qu'un agent d'adhérence est appliqué par projection, par enduction ou par immersion sur le noyau (3) en matière plastique avant que ce dernier soit enveloppé de masse (24).
  23. Procédé de fabrication d'un isolateur composite en matière plastique suivant l'une des revendication 19 à 21, caractérisé par le fait qu'un agent d'adhérence à base de silane est utilisé.
  24. Procédé de fabrication d'un isolateur composite en matière plastique suivant l'une des revendication 19 à 22, caractérisé par le fait que la taille et/ou la forme de l'ouverture (25) d'une filière (23, 23a) est modifiée pendant l'extrusion.
  25. Procédé de fabrication d'un isolateur composite en matière plastique suivant l'une des revendication 19 à 23, caractérisé par le fait que les ailettes en hélice sont extrudées avec des portions (15) à porte-à-faux décroissant latéralement vers les capots.
  26. Procédé de fabrication d'un isolateur composite en matière plastique suivant l'une des revendication 19 à 23, caractérisé par le fait que les extrémités des ailettes en hélice sont chanfreinées, arrondies ou usinées sous forme de portions (15) à porte-à-faux décroissant latéralement vers les capots.
  27. Procédé de fabrication d'un isolateur composite en matière plastique suivant l'une des revendication 19 à 25, caractérisé par le fait que le noyau en matière plastique est relié par vulcanisation à l'enveloppe à ailettes.
  28. Dispositif (20) pour la fabrication d'un isolateur composite en matière plastique suivant l'une des revendication 1 à 18, comprenant une extrudeuse (21) ou une presse à piston, un fourreau (22), une tuyère (23 ou 23a) avec ouverture (25) et un dispositif de transport (26) pour le noyau en matière plastique, caractérisé par le fait que la tuyère est équipée d'un dispositif de rotation (27).
  29. Dispositif (20) pour la fabrication d'un isolateur composite en matière plastique suivant l'une des revendication 1 à 18, comprenant une extrudeuse (21) ou une presse à piston, un fourreau (22), une tuyère (23 ou 23a) avec ouverture (25) et un dispositif de transport (26) pour le noyau en matière plastique, caractérisé par le fait que le dispositif de transport est équipé d'un dispositif de rotation (27a) pour le noyau en matière plastique.
  30. Dispositif suivant la revendication 28 ou 29, caractérisé par le fait que la filière (23 ou 23a) contient un disque profilé (29) avec ouverture (25), qui est monté élastiquement.
  31. Dispositif suivant l'une des revendication 28 à 30, caractérisé par le fait que l'ouverture présente un évidement (30) circulaire qui est disposé de façon centrale par rapport à l'axe de transport du noyau en matière plastique et auquel se raccorde au moins un élargissement (31) sensiblement forme de doigt en direction radiale ou sous un angle.
  32. Dispositif suivant la revendication 31, caractérisé par le fait que l'ouverture (25) présente dans la zone de l'élargissement (31) sensiblement forme de doigt au moins un rétrécissement ou au moins un deuxième élargissement dérivant de cet élargissement.
  33. Dispositif suivant l'une des revendication 30 à 32, caractérisé par le fait que l'ouverture (25) est munie d'un dispositif (28) permettant de modifier la taille et/ou la forme de l'ouverture pendant le fonctionnement.
  34. Dispositif suivant l'une des revendication 30 à 32, caractérisé par le fait que l'évidement (30) circulaire de l'ouverture (25) présente un diamètre qui est d'au moins 0,2 mm plus grand que le diamètre du noyau en matière plastique à l'endroit correspondant lors du transport à travers l'ouverture.
  35. Utilisation d'un isolateur composite en matière plastique suivant l'une des revendications 1 à 18 en tant que isolateur haute tension ou en tant que corps pour des appareils électriques, en particulier pour applications à l'air libre.
EP97112500A 1996-07-24 1997-07-22 Isolateur composite en matière plastique avec jupe en spirale et procédé de fabrication Expired - Lifetime EP0821373B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19629796 1996-07-24
DE19629796A DE19629796C5 (de) 1996-07-24 1996-07-24 Kunststoffverbundisolator mit spiralförmigem Schirm und Verfahren zu seiner Herstellung

Publications (2)

Publication Number Publication Date
EP0821373A1 EP0821373A1 (fr) 1998-01-28
EP0821373B1 true EP0821373B1 (fr) 2003-04-02

Family

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Application Number Title Priority Date Filing Date
EP97112500A Expired - Lifetime EP0821373B1 (fr) 1996-07-24 1997-07-22 Isolateur composite en matière plastique avec jupe en spirale et procédé de fabrication

Country Status (6)

Country Link
US (1) US5925855A (fr)
EP (1) EP0821373B1 (fr)
JP (1) JP4205186B2 (fr)
DE (2) DE19629796C5 (fr)
HU (1) HU223912B1 (fr)
ZA (1) ZA976531B (fr)

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SE510064C2 (sv) * 1997-08-27 1999-04-12 Asea Brown Boveri Förfarande och anordning för framställning av elektrisk isolator med skruv- eller spiralformad beläggning
DE19858215C2 (de) * 1998-12-17 2003-07-24 Ceramtec Ag Verfahren und Vorrichtung zur Herstellung von Verbundisolatoren
AU2002224778A1 (en) * 2000-10-13 2002-04-22 Lapp Insulator Gmbh Production of composite insulators by injecting different screens onto an insulator shank
CA2349253C (fr) * 2000-12-26 2009-11-17 S&C Electric Company Methode et agencement pour la fourniture d'un joint de boitier etanche aux gaz
US6657128B2 (en) * 2001-01-29 2003-12-02 Mcgraw-Edison Company Hydrophobic properties of polymer housings
GB0116135D0 (en) * 2001-06-29 2001-08-22 Tyco Electronics Ltd Uk "Helical shed"
US6952154B2 (en) * 2002-06-16 2005-10-04 Maclean-Fogg Company Composite insulator for fuse cutout
US6831232B2 (en) * 2002-06-16 2004-12-14 Scott Henricks Composite insulator
FR2859048B1 (fr) * 2003-08-20 2005-12-23 Electricite De France Dispositif d'isolation electrique pour un engin de manutention
SE526328C2 (sv) * 2003-12-19 2005-08-23 Abb Technology Ltd Kraftkondensator
DE102006061599A1 (de) * 2006-12-27 2008-07-03 Cellpack Gmbh Füll- und Abdichtsystem für elektrisch isolierende Gehäuse und Umhüllungen zur Aufnahme von Kabel- und Leitungsverbindungen
US7646282B2 (en) * 2007-12-14 2010-01-12 Jiri Pazdirek Insulator for cutout switch and fuse assembly
US20110037454A1 (en) * 2009-08-13 2011-02-17 Won Taek Han CdSe QUANTUM DOTS DOPED OPTICAL FIBER AND A CURRENT SENSOR USING THE SAME
DE102010027417A1 (de) * 2010-07-09 2011-08-25 AREVA Energietechnik GmbH, 93055 Isolator und Verfahren zur Herstellung eines Isolators
US8729396B2 (en) 2010-09-02 2014-05-20 Cooper Technologies Company Full composite insulator for electrical cutout
DE102011088248A1 (de) * 2011-12-12 2013-06-13 Wacker Chemie Ag Verfahren zur Herstellung von Verbundisolatoren
DE102017004477A1 (de) * 2017-05-10 2018-11-15 Gemo D.G. Moritz GmbH & Co. Kommanditgesellschaft Verfahren zur Herstellung eines Steigungskabels und Extruder zu seiner Durchführung
US11478127B2 (en) * 2019-03-28 2022-10-25 Olympus Corporation Thin-walled spiral tube for use with endoscope
US11488748B2 (en) * 2020-06-12 2022-11-01 Hubbell Incorporated Integrated insulator seal and shield assemblies

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Also Published As

Publication number Publication date
ZA976531B (en) 1998-01-26
DE19629796A1 (de) 1998-01-29
JP4205186B2 (ja) 2009-01-07
JPH1097817A (ja) 1998-04-14
HUP9701262A3 (en) 1999-10-28
HU9701262D0 (en) 1997-09-29
DE19629796C5 (de) 2004-12-16
HU223912B1 (hu) 2005-03-29
EP0821373A1 (fr) 1998-01-28
DE19629796C2 (de) 1998-07-16
DE59709669D1 (de) 2003-05-08
US5925855A (en) 1999-07-20
HUP9701262A2 (hu) 1998-04-28

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