EP0821373B1 - Kunststoffverbundisolator mit spiralförmigem Schirm und Verfahren zu seiner Herstellung - Google Patents
Kunststoffverbundisolator mit spiralförmigem Schirm und Verfahren zu seiner Herstellung Download PDFInfo
- 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.)
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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
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- 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)
Description
Die Geradheitsabweichung einer im wesentlichen geraden Linie auf der Oberfläche der Schirmhülle beträgt üblicherweise nicht mehr als 0,5 mm, vorzugsweise nicht mehr als 0,3 mm, insbesondere nicht mehr als 0,1 mm.
Verbundisolator Typ | Schirme | Baulänge | Kriechweg | Gewicht Schirmhülle | Gewichtsersparnis |
30/3(168) 430 | 3 Tellerschirme | 430 mm | 550 mm | 730 g | - |
1 Spiralschirm mit 11,25 Windungen | 430 mm | 550 mm | 319 g | 56 % | |
30/2(168) 405 | 2 Tellerschirme | 405 mm | 405 mm | 520 g | - |
1 Spiralschirm mit 7,5 Windungen | 405 mm | 405 mm | 234 g | 55 % |
Kunststoffverbundisolators nach einem der Ansprüche 1 bis 18 umfaßt einen Extruder oder eine Kolbenpresse, einen Pinolenkopf, ein Mundstück mit Öffnung und eine Transporteinrichtung für den Kunststoffkern und ist dadurch gekennzeichnet, daß das Mundstück mit einer Dreheinrichtung ausgestattet ist. Eine andere Vorrichtung gemäß Anspruch 29, zur Herstellung eines erfindungsgemäßen Kunststoffverbundisolators nach einem der Ansprüche 1 bis 18 enthält einen Extruder oder eine Kolbenpresse, einen Pinolenkopf, ein Mundstück mit Öffnung und eine Transporteinrichtung für den Kunststoffkern, wobei die Transporteinrichtung mit einer Dreheinrichtung für den Kunststoffkern ausgestattet ist. Das Mundstück kann eine Profilscheibe enthalten, die federnd gelagert ist, und birgt eine Öffnung, die bevorzugt in einer Profilscheibe angeordnet ist. Die Öffnung kann eine zur Transportachse des Kunststoffkerns zentrisch angeordnete kreisförmige Ausnehmung aufweisen, die in mindestens eine etwa zapfenförmige Ausweitung in radialer oder abgewinkelter Richtung übergeht. Die Öffnung kann im Bereich der etwa zapfenförmigen Ausweitung mindestens eine Einengung oder mindestens eine von dieser Ausweitung abzweigende zweite Ausweitung aufweisen. Sie kann mit einer Einrichtung versehen sein, mit der die Öffnung während des Betriebs in der Größe oder/und in der Form verändert werden kann. Die kreisförmige Ausnehmung der Öffnung kann einen Durchmesser aufweisen, der mindestens 0,2 mm größer ist als der Durchmesser des Kunststoffkerns an der zugehörigen Stelle beim Transportieren durch die Öffnung.
Claims (35)
- Kunststoffverbundisolator (1) enthaltend einen Strunk (2) und mindestens einen Schirm und Kappen, bei dem der Strunk einen faserverstärkten Kunststoffkern (3) und um diesen Kern herum einen Mantel (5) einer Schirmhülle (4) enthält und bei dem die Schirmhülle (4) aus dem Mantel (5) und mindestens einem um den Strunk spiralförmig laufenden Schirm (6) gebildet wird, dadurch gekennzeichnet, daß die Schirmhülle (4) einteilig und ohne Fugen geformt ist und daß sie eine glatte Oberfläche ohne Längsnähte und ohne Quernähte aufweist.
- Kunststoffverbundisolator nach Anspruch 1, dadurch gekennzeichnet, daß die Oberseite (7) der spiralförmigen Schirme (6) konvex geformt ist.
- Kunststoffverbundisolator nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Unterseite (8) der spiralförmigen Schirme (6) konkav geformt ist.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Unterseite (8) der spiralförmigen Schirme (6) eine Wellung oder mindestens eine Rippe oder mindestens eine Rille aufweist.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Sehne der die Oberseite der Schirme in Längsrichtung (L) schneidenden Querschnittsfläche mit der Längsrichtung (L) einen Winkel α von 30 ° bis 80 ° einschließt.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Kunststoffkern mit Fasern aus alkaliarmem Glas verstärkt ist.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß die Schirmhülle (4) Kautschuk enthält, der bei erhöhter Temperatur vulkanisierbar ist.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, daß die spiralförmigen Schirme (6) seitlich zu Kappen (19) hin Ausläufe (15) aufweisen.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß mindestens ein spiralförmiger Schirm (6) im mittleren Bereich des Strunkes (2) unterbrochen ist und seitlich von dieser Unterbrechung Ausläufe (15) oder im Bereich der Unterbrechung eine verringerte Ausladung (13) aufweist.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß mindestens ein spiralförmiger Schirm (6) mit einem über die Länge variierenden Schirmquerschnitt (17) versehen ist.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß erst in größerem Abstand von einer Kappe mindestens ein spiralförmiger Schirm (6) mit einem Auslauf (15) angeformt ist.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, daß er mindestens zwei spiralförmige Schirme (6) aufweist, die einen von einander abweichenden Schirmquerschnitt (17) zeigen.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 12, dadurch gekennzeichnet, daß er zumindest in einem Bereich des Strunkes (2) mit einer dichten Folge von Schirmabschnitten im Längsschnitt - ähnlich einem Kamm - ausgestattet ist.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 13, dadurch gekennzeichnet, daß am Strunk mindestens an einem Strunkende (16) mindestens ein tellerförmiger Schirm (18) angeformt oder aufgebracht ist.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, daß die spiralförmigen Schirme (6) - außer an den Enden der Ausläufe (15) - eine Ausladung (13) senkrecht zum Strunk (2) ab Oberfläche des Mantels (9) von 5 bis 100 mm, insbesondere von 10 bis 70 mm, besonders bevorzugt von 15 bis 40 mm aufweisen.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, daß der Abstand (12) zwischen zwei Schirmabschnitten in Längsrichtung L nahe der Oberfläche des Mantels gemessen 5 bis 1000 mm, insbesondere 10 bis 500 mm, besonders bevorzugt 20 bis 100 mm beträgt.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, daß der Kunststoffkern zylindrisch, bauchig gewölbt oder konisch ausgebildet ist.
- Kunststoffverbundisolator nach einem der Ansprüche 1 bis 17, dadurch gekennzeichnet, daß der Kunststoffkern ein Vollstab oder ein Hohlkörper ist.
- Verfahren zur Herstellung eines Kunststoffverbundisolators nach einem der Ansprüche 1 bis 18, dadurch gekennzeichnet, daß auf einen faserverstärkten Kunststoffkern (3) ein Haftmittel aufgebracht wird, daß der so vorbehandelte Kunststoffkern in einen Extruder (21) oder in eine Kolbenpresse, die einen Pinolenkopf (22) mit einem drehbaren Mundstück (23) aufweisen, eingeführt wird, daß die Transportgeschwindigkeit des Kunststoffkerns mit der Drehgeschwindigkeit des drehbaren Mundstücks gekoppelt ist, daß die Masse (24) zur Herstellung der Schirmhülle (4) um den vorbehandelten Kunststoffkern herum verdichtet und durch das drehbare Mundstück gepreßt wird, so daß der vorbehandelte Kunststoffkern in Längsrichtung mit einer einteiligen Schirmhülle aus Mantel und Schirm/Schirmen in Form einer oder mehrerer Spiralen versehen wird.
- Verfahren zur Herstellung eines Kunststoffverbundisolators nach einem der Ansprüche 1 bis 18, dadurch gekennzeichnet, daß auf einen faserverstärkten Kunststoffkern (3) ein Haftmittel aufgebracht wird, daß der so vorbehandelte Kunststoffkern in einen Extruder (21) oder in eine Kolbenpresse, die einen Pinolenkopf (22) mit einem Mundstück (23a) aufweisen, drehend eingeführt wird, daß die Transportgeschwindigkeit des Kunststoffkerns mit seiner Drehgeschwindigkeit gekoppelt ist, daß die Masse (24) zur Herstellung der Schirmhülle (4) um den vorbehandelten Kunststoffkern herum verdichtet und durch die Öffnung (25) des Mundstücks gepreßt wird, so daß der vorbehandelte Kunststoffkern in Längsrichtung mit einer einteiligen Schirmhülle aus Mantel und Schirm/Schirmen in Form einer oder mehrerer Spiralen versehen wird.
- Verfahren zur Herstellung eines Kunststoffverbundisolators nach Anspruch 19, dadurch gekennzeichnet, daß der Kunststoffkern (3) in einen Extruder (21) oder in eine Kolbenpresse drehend eingeführt wird und daß die Transportgeschwindigkeit des Kunststoffkerns mit seiner Drehgeschwindigkeit gekoppelt ist.
- Verfahren zur Herstellung eines Kunststoffverbundisolators nach Anspruch 19 oder 20, dadurch gekennzeichnet, daß ein Haftmittel auf den Kunststoffkern (3) vor dem Umhüllen mit Masse (24) durch Aufspritzen, Aufstreichen oder Tauchen aufgebracht wird.
- Verfahren zur Herstellung eines Kunststoffverbundisolators nach einem der Ansprüche 19 bis 21, dadurch gekennzeichnet, daß ein Haftmittel auf Basis Silan verwendet wird.
- Verfahren zur Herstellung eines Kunststoffverbundisolators nach einem der Ansprüche 19 bis 22, dadurch gekennzeichnet, daß die Größe oder/und die Form der Öffnung (25) eines Mundstücks (23, 23a) während des Extrudierens verändert wird.
- Verfahren zur Herstellung eines Kunststoffverbundisolators nach einem der Ansprüche 19 bis 23, dadurch gekennzeichnet, daß die spiralförmigen Schirme seitlich zu den Kappen hin mit Ausläufen (15) gepreßt werden.
- Verfahren zur Herstellung eines Kunststoffverbundisolators nach einem der Ansprüche 19 bis 23, dadurch gekennzeichnet, daß die Enden der spiralförmigen Schirme seitlich zu den Kappen hin zu Ausläufen (15) gefast, abgerundet oder abgearbeitet werden.
- Verfahren zur Herstellung eines Kunststoffverbundisolators nach einem der Ansprüche 19 bis 25, dadurch gekennzeichnet, daß der Kunststoffkern mit der Schirmhülle durch Vulkanisieren verbunden wird.
- Vorrichtung (20) zur Herstellung eines Kunststoffverbundisolators nach einem der Ansprüche 1 bis 18, die einen Extruder (21) oder eine Kolbenpresse, einen Pinolenkopf (22), ein Mundstück (23 oder 23a) mit Öffnung (25) und eine Transporteinrichtung (26) für den Kunststoffkern enthält, dadurch gekennzeichnet, daß das Mundstück mit einer Dreheinrichtung (27) ausgestattet ist.
- Vorrichtung (20) zur Herstellung eines Kunststoffverbundisolators nach einem der Ansprüche 1 bis 18, die einen Extruder (21) oder eine Kolbenpresse, einen Pinolenkopf (22), ein Mundstück (23 oder 23a) mit Öffnung (25) und eine Transporteinrichtung (26) für den Kunststoffkern enthält, dadurch gekennzeichnet, daß die Transporteinrichtung mit einer Dreheinrichtung (27a) für den Kunststoffkern ausgestattet ist.
- Vorrichtung nach Anspruch 28 oder 29, dadurch gekennzeichnet, daß das Mundstück (23 oder 23a) eine Profilscheibe (29), die federnd gelagert ist, mit Öffnung (25) enthält.
- Vorrichtung nach einem der Ansprüche 28 bis 30, dadurch gekennzeichnet, daß die Öffnung eine zur Transportachse des Kunststoffkerns zentrisch angeordnete kreisförmige Ausnehmung (30) aufweist, die in mindestens eine etwa zapfenförmige Ausweitung (31) in radialer oder abgewinkelter Richtung übergeht.
- Vorrichtung nach Anspruch 31, durch gekennzeichnet, daß die Öffnung (25) im Bereich der etwa zapfenförmigen Ausweitung (31) mindestens eine Einengung oder mindestens eine von dieser Ausweitung abzweigende zweite Ausweitung (32) aufweist.
- Vorrichtung nach einem der Ansprüche 30 bis 32, dadurch gekennzeichnet, daß die Öffnung (25) mit einer Einrichtung (28) versehen ist, mit der die Öffnung während des Betriebs in der Größe oder/und in der Form verändert werden kann.
- Vorrichtung nach einem der Ansprüche 30 bis 32, dadurch gekennzeichnet, daß die kreisförmige Ausnehmung (30) der Öffnung (25) einen Durchmesser aufweist, der mindestens 0,2 mm größer ist als der Durchmesser des Kunststoffkerns an der zugehörigen Stelle beim Transportieren durch die Öffnung.
- Verwendung eines Kunststoffverbundisolators nach einem der Ansprüche 1 bis 18 als Hochspannungsisolator oder als Gehäuse für elektrische Apparate, insbesondere bei Freiluftanwendungen.
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 (de) | 1998-01-28 |
EP0821373B1 true EP0821373B1 (de) | 2003-04-02 |
Family
ID=7800656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97112500A Expired - Lifetime EP0821373B1 (de) | 1996-07-24 | 1997-07-22 | Kunststoffverbundisolator mit spiralförmigem Schirm und Verfahren zu seiner Herstellung |
Country Status (6)
Country | Link |
---|---|
US (1) | US5925855A (de) |
EP (1) | EP0821373B1 (de) |
JP (1) | JP4205186B2 (de) |
DE (2) | DE19629796C5 (de) |
HU (1) | HU223912B1 (de) |
ZA (1) | ZA976531B (de) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 (en) * | 2000-12-26 | 2009-11-17 | S&C Electric Company | Method and arrangement for providing a gas-tight housing joint |
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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Publication number | Priority date | Publication date | Assignee | Title |
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US3003022A (en) * | 1958-03-07 | 1961-10-03 | Cie Generale Electro Ceramique | Finned insulator |
FR76305E (fr) * | 1959-06-03 | 1961-10-06 | Cie Generale Electro Ceramique | Isolateur à ailette |
US3257501A (en) * | 1961-04-20 | 1966-06-21 | Westinghouse Electric Corp | Self-cleaning electrical insulator constructions |
AT260323B (de) * | 1964-09-16 | 1968-02-26 | Elektroporcelan Narodni Podnik | Isolator, vorzugsweise Langstabisolator für Freiluft-Hochspannungsleitungen, mit spiralförmigen Schutzschirm |
US3685147A (en) * | 1970-05-27 | 1972-08-22 | Phelps Dodge Copper Prod | Method of making coaxial cable |
US3786175A (en) * | 1971-04-27 | 1974-01-15 | Transmission Dev Ltd | Electrical insulator having sheds arranged at an angle to its axis |
FR2363170A1 (fr) * | 1976-08-26 | 1978-03-24 | Ceraver | Isolateur electrique a barreau isolant stratifie et procede de realisation |
DE2746870C2 (de) * | 1977-10-19 | 1982-08-26 | Rosenthal Technik Ag, 8672 Selb | Verfahren zur Herstellung von Freiluft-Verbundisolatoren |
SU659382A1 (ru) * | 1977-11-25 | 1979-04-30 | Предприятие П/Я А-3944 | Установка дл непрерывного формовани винтореберных изол торов |
CH640664A5 (de) * | 1979-11-05 | 1984-01-13 | Sprecher & Schuh Ag | Mechanisch beanspruchbares glasfaserverstaerktes kunststoff-isolierteil. |
DE3023543C2 (de) * | 1980-06-24 | 1982-09-09 | Karl Pfisterer Elektrotechnische Spezialartikel Gmbh & Co Kg, 7000 Stuttgart | Verfahren zur Herstellung eines Langstabisolators |
CH640666A5 (en) * | 1981-05-22 | 1984-01-13 | Cossonay Cableries Trefileries | Method for manufacturing a high-voltage outdoor insulator and insulator produced according to this method |
WO1985002053A1 (en) * | 1983-11-01 | 1985-05-09 | Klaey Hans | Apparatus for fabricating a shell band and for the winding thereof on an insulator traction element |
US4833278A (en) * | 1988-10-31 | 1989-05-23 | Hyrdro-Quebec | Insulator housing made from polymeric materials and having spirally arranged inner sheds and water sheds |
US5223190A (en) * | 1991-02-01 | 1993-06-29 | Pirelli Cavi S.P.A. | Apparatus and method to make composite insulators for electric overhead lines |
CA2046682A1 (en) * | 1990-08-10 | 1992-02-11 | Roger G. Chaffee | High voltage insulator |
-
1996
- 1996-07-24 DE DE19629796A patent/DE19629796C5/de not_active Expired - Fee Related
-
1997
- 1997-07-22 DE DE59709669T patent/DE59709669D1/de not_active Expired - Lifetime
- 1997-07-22 EP EP97112500A patent/EP0821373B1/de not_active Expired - Lifetime
- 1997-07-22 US US08/898,353 patent/US5925855A/en not_active Expired - Lifetime
- 1997-07-22 HU HU9701262A patent/HU223912B1/hu active IP Right Grant
- 1997-07-23 ZA ZA9706531A patent/ZA976531B/xx unknown
- 1997-07-24 JP JP19852697A patent/JP4205186B2/ja not_active Expired - Lifetime
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 (de) | 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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