EP0807310A1 - Isolator mit kittverbindung und verfahren zu seiner herstellung - Google Patents
Isolator mit kittverbindung und verfahren zu seiner herstellungInfo
- Publication number
- EP0807310A1 EP0807310A1 EP96901742A EP96901742A EP0807310A1 EP 0807310 A1 EP0807310 A1 EP 0807310A1 EP 96901742 A EP96901742 A EP 96901742A EP 96901742 A EP96901742 A EP 96901742A EP 0807310 A1 EP0807310 A1 EP 0807310A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fitting
- layer
- electrical insulator
- insulator according
- insulating body
- Prior art date
- 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.)
- Granted
Links
Classifications
-
- 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
- H01B17/38—Fittings, e.g. caps; Fastenings therefor
Definitions
- the invention relates to an electrical insulator with at least one fitting cemented onto an insulating body.
- Insulators and especially high-voltage insulators are used in large numbers in overhead lines and outdoor switchgear.
- Most insulators consist of an insulating body with fittings placed in the form of metal caps on the ends of the insulating body in a non-positive and / or positive manner. These are used primarily for power transmission.
- the outer diameter of the insulator trunk and, in the case of hollow insulators, additionally the wall thickness of the insulator trunk are designed primarily according to the mechanical load on the insulator.
- the trunk ends and fittings are designed differently depending on the size and type of mechanical load.
- the insulating body and the associated fittings are usually essentially rotationally symmetrical.
- the trunk ends of the long-rod insulators which are mainly subjected to tensile forces, are mostly conical;
- the gap between the insulating body stem and the fitting is usually cast with a lead alloy.
- Support or / and hollow insulators have predominantly cylindrical trunk ends. Often, such trunk ends are encased at the socket with round or broken chippings, which are sintered in a glaze layer; just like corrugations, corrugations or rough surfaces in the area of the socket, this improves the force and / or form fit.
- the gap between the fitting and the end of the trunk is usually filled with setting or hardening putty materials such as cement mortar.
- the cylindrical, split trunk ends are often non-positively or / and positively connected with a lean Portland cement with a fitting, which usually consists of galvanized cast iron or an aluminum alloy.
- the embodiments according to the state of the art have only a single layer between the fitting and the kit shell containing set cement, if an adhesion promoter layer is occasionally applied to the fitting and is intended to improve the adhesion of the subsequent coating.
- This single layer can consist of several layers of the same material. It has been determined in experiments that it is not possible with this one layer between the fitting and the kit tray according to the prior art to achieve both high bending moments when trying to break, and a low permanent fitting displacement after routine tests with bending or / and internal pressure loading.
- the permanent valve displacement is the displacement between the valve underside and the end face of the insulating body trunk one day after routine tests as a result of the previously applied routine test load according to EN 50062, DIN VDE 0674, Part 3, November 1992, in relation to the position before the routine test load.
- the valve is mainly moved in the longitudinal direction of the isolator and also tilts when the forces are applied laterally. It can be connected to an expansion of the valve circumference.
- the position of the fitting is measured every 90 * in the direction of the longitudinal axis of the insulator by means of a dial gauge as the distance between the ground face of the insulating body and a flat, position-marked bar placed on the face of the fitting;
- the largest difference value determined on a valve between assigned measured values before and after routine tests is used as the value for the permanent valve displacement.
- the break test is one of the more frequently performed mechanical tests, in which a hollow insulator is tested in a bending test according to EN 50062, DIN VDE 0674, Part 3, November 1992, in a multi-stage test for maximum load capacity and thus until it breaks.
- Insulators that are not hollow insulators can be tested in a similar manner according to IEC 168, 1988.
- the insulator is firmly clamped at the foot end and pulled perpendicular to its longitudinal axis at the opposite end.
- the bending strength is understood to mean the maximum load that can be tolerated.
- the invention has for its object to propose an insulator with a putty connection, which ensures both a high bending strength and a low permanent valve displacement.
- an electrical insulator with at least one fitting cemented onto an insulating body, in which the insulating body is connected to the fitting via a kit shell, which is characterized in that a layer composite is applied to the fitting between the kit shell and the fitting , which contains at least two layers of different materials, that at least one of the layers protects the fitting against corrosion and that at least one other layer enables movement between the kit shell and the fitting.
- kits bowl and the fitting Two, three or four different layers are preferably applied between the kit bowl and the fitting.
- Each of these layers can be made up of several layers of the same material.
- One of these layers can be an adhesion promoter layer applied directly on the fitting, which is intended to improve the adhesion between the fitting and the second layer applied on the fitting.
- the insulator can u. a. made of ceramic or glass according to IEC 672, 1980.
- the fittings are usually made of galvanized cast iron or an aluminum alloy. The shapes of the fittings are specifically designed. They can have a sawtooth-like profile on the side facing the socket.
- the kit bowl usually consists of a set or hardened cement material.
- the layer of the laminate facing the fitting which protects the fitting from corrosion, has a layer thickness of 5 to 1000 ⁇ m, preferably 20 to 500 ⁇ m, in particular 80 to 200 ⁇ m.
- this layer consists of an alkali-resistant layer, preferably from alkali resistant corrosion protection materials such as. B. cast resin, reaction or synthetic resin lacquer, particularly preferably from two-component epoxy resin.
- the corrosion protection material is preferably sprayed on or spread on.
- the lubricious layer of the layered composite which enables and absorbs movement between the kit bowl and the fitting, can rather have a subordinate corrosion protection function. It can be applied directly to the anti-corrosion layer.
- This layer can be made of a bituminous paint, other lubricious paint or a lubricant such as e.g. There are lubricants based on molybdenum disulfide or graphite, metal lubricants, lubricating varnishes, greases and / or oils.
- the material of this layer must be resistant to the putty material, the kit shell made of hardened or water-set putty material and also largely resistant to the water that may be contained. It can be spread or sprayed onto the coated fitting.
- the layer thickness of this layer can be 2 to 1000 ⁇ m, preferably 5 to 20 ⁇ 7ftn, in particular 10 to 80 ⁇ m.
- the object is achieved by a method for producing an electrical insulator with at least one fitting cemented onto an insulating body, in which the insulating body is connected to the fitting via a kit shell and is characterized in that the inside of the fitting facing the kit shell is at least provided with a corrosion protection layer and a layer which enables the movement between the kit shell and the fitting is coated.
- Mainly mortar and cement can be used as cement material.
- a grouting mortar which is poured into the gap between the trunk end of the insulating body and the fitting in a simple manner, is particularly easy to work with and is inexpensive because of the rapid setting.
- a grout does not need like other mortars and Cements to be shaken.
- the composite with several layers between the fitting and the kit shell can be used with all known fitting and insulating body materials which are cemented with cement, mortar or similar cementing materials and, if necessary, with the addition of other substances.
- the isolators according to the invention especially high-voltage isolators, are particularly suitable as support and / or hollow isolators.
- the individual layers can usually be seen visually when the armature is sawn open and the layered composite is scored.
- a layer of bituminous paint material applied between the sintered split layer and the kit shell has little or no influence on the permanent movement of the fittings.
- This layer preferably has an adhesive effect and a damping effect with regard to the different thermal expansion, especially between the insulating body and the kit shell.
- Figure 1 shows a longitudinal section through a hollow insulator in the area around the The insulating body 1 has in its center a cylindrical cavity 2 which extends in the longitudinal direction.
- chippings 4 are applied to the surface of the insulating body 1, which may be sintered with a glaze and, if necessary, also additionally have a layer 5 of bituminous paint material.
- the armature 6 shows a sawtooth-like profile on the side facing the mounting point 3 and is covered with a layer composite 7 composed of two layers 8 and 9.
- the anti-corrosion layer 8 is overlaid by a slidable layer 9 which enables and catches the movement between the fitting 6 and the kit shell 10.
- the gap between the insulating body 1 and the fitting 6 is filled primarily with set or hardened cement material that forms the kit shell 10.
- set or hardened cement material that forms the kit shell 10.
- the insulating body face 1 1 is approximately parallel to the armature face 1 2.
- Figure 2 shows the detail II of Figure 1 enlarged.
- a so-called medium-sized earth insulator was selected, which is common and is intended for operation as a hollow insulator at 145 kV.
- the insulating bodies of the test specimens were made of alumina porcelain.
- the cylindrical trunk ends had an outer diameter of about 200 mm in the area of the socket.
- a round grit was applied, which was sintered with a glaze; a bituminous paint was applied thereon.
- the fittings consisted of the aluminum alloy G-AISil OMg wa and had an internal sawtooth profile.
- the fittings were coated over the entire inside with the materials specified in Table 1. The coatings were applied by spraying. Other parameters influencing the cementation were kept constant.
- the structure of the layers and the results of the tests are listed in Tables 1 and 2.
- the layer thicknesses were measured eight times over the valve circumference and are approximate values for the slightly fluctuating layer thickness.
- Table 1 Structure of the layers. The layer thicknesses are averages over several tests. The layer thickness of the assembly spray was not determined.
- routine tests were carried out one day before the break test: First a bending test to 70% of the nominal bending moment on 3 test specimens produced in the same way and then an internal pressure test with a one-minute hold time according to EN 50062 to up to approximately 70% of the minimum burst pressure.
- the upper and lower ends were tested separately; the force was applied to the cylindrical porcelain body outside the fitting.
- the test specimens were each loaded by 90 * over 10 s.
- none of the test subjects were examined Damage found as a result of routine tests. The permanent valve displacement resulting from the bending test and the internal pressure test was determined on the day of the break test.
- the break test was carried out in the same orientation of the insulator to the test apparatus as in the fourth loading of the bending test. The load was applied until the hollow insulators broke by bending. In each experiment, the three insulators were broken at the top and bottom.
- 8 strain gauges were attached perpendicular to the longitudinal direction of the insulator on the outwardly projecting edge of the fitting of each fitting in order to determine the fitting expansions. The values of the bending moments were averaged from 6 measured values in each case.
- the measured values for valve expansion which were measured in the wrapping tests according to EN 50062 at a nominal bending moment of 20 kNm, confirm, as is known from shrink connections, that high radial stresses allow high bending moments.
- the measured high elongation values are based on a relative movement between the kit shell and the fitting, in which the fitting is pulled out of the kit shell away from the insulating body essentially in the longitudinal direction of the insulator; Here, the valve is expanded in diameter with a sawtooth-like profile of the valve and the kit bowl.
- the moveable layer is crucial for the high valve expansion when the putty is loaded. This results in a high radio tension acting on the kit shell, with the result of high break values. Furthermore, when the kit bowl is relieved of pressure, the valve slides back at the end of each mechanical test and thus a low permanent valve movement is achieved.
Landscapes
- Insulators (AREA)
- Insulating Bodies (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Manufacture Of Motors, Generators (AREA)
- Building Environments (AREA)
- Coupling Device And Connection With Printed Circuit (AREA)
- Ceramic Products (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19503324 | 1995-02-02 | ||
| DE19503324A DE19503324A1 (de) | 1995-02-02 | 1995-02-02 | Isolator mit Kittverbindung und Verfahren zu seiner Herstellung |
| PCT/EP1996/000226 WO1996024144A1 (de) | 1995-02-02 | 1996-01-19 | Isolator mit kittverbindung und verfahren zu seiner herstellung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0807310A1 true EP0807310A1 (de) | 1997-11-19 |
| EP0807310B1 EP0807310B1 (de) | 1998-10-14 |
Family
ID=7752969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96901742A Revoked EP0807310B1 (de) | 1995-02-02 | 1996-01-19 | Isolator mit kittverbindung und verfahren zu seiner herstellung |
Country Status (15)
| Country | Link |
|---|---|
| US (1) | US5985087A (de) |
| EP (1) | EP0807310B1 (de) |
| JP (1) | JPH10513004A (de) |
| CN (1) | CN1089936C (de) |
| AT (1) | ATE172321T1 (de) |
| BR (1) | BR9607580A (de) |
| CA (1) | CA2212255C (de) |
| CZ (1) | CZ289279B6 (de) |
| DE (2) | DE19503324A1 (de) |
| ES (1) | ES2122783T3 (de) |
| FI (1) | FI960446L (de) |
| IL (1) | IL116979A (de) |
| PL (1) | PL178732B1 (de) |
| WO (1) | WO1996024144A1 (de) |
| ZA (1) | ZA96775B (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2765385B1 (fr) * | 1997-06-26 | 2003-12-05 | Gec Alsthom T & D Sa | Ferrure d'isolateur composite |
| IT1299049B1 (it) * | 1998-04-08 | 2000-02-07 | Abb Research Ltd | Isolatore particolarmente per linee elettriche di trasmissione e distribuzione, avente caratteristiche migliorate di resistenza alle |
| DE10213111A1 (de) * | 2002-03-23 | 2003-10-02 | Tesa Ag | Mehrschichtige Laser-Transferfolie zum dauerhaften Beschriften von Bauteilen |
| ATE521070T1 (de) * | 2007-05-23 | 2011-09-15 | Abb Technology Ag | Hochspannungsisolator und kühlelement mit diesem hochspannungsisolator |
| US10584475B1 (en) * | 2019-06-19 | 2020-03-10 | Soleman Abdi Idd | Method and system for construction and building |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3576938A (en) * | 1969-11-07 | 1971-05-04 | Gen Electric | Electrical insulator with polymer-containing joint between the porcelain and the hardware |
| FR2292318A1 (fr) * | 1974-11-25 | 1976-06-18 | Ceraver | Perfectionnement a la liaison entre ame et armatures de structures comportant une ame de fibres agglomerees |
| US4267402A (en) * | 1978-08-07 | 1981-05-12 | Gould Inc. | Polymer concrete body with vibration molded threads, method of making same, and electrical insulator provided with the same |
| FR2445596A2 (fr) * | 1978-12-27 | 1980-07-25 | Ceraver | Perfectionnement a la liaison entre ame et armatures de structures comportant une ame de fibres agglomerees |
| FR2499301A1 (fr) * | 1981-02-05 | 1982-08-06 | Ceraver | Isolateur en matiere organique comportant une ame en stratifie |
| DE4212146C1 (en) * | 1992-04-10 | 1993-08-19 | Siemens Ag, 8000 Muenchen, De | Light conductor with optical fibres inside three consecutive layers - has its fibres loosely embedded in filling paste, then inside second polymer with higher thermal stability and outermost extruded sleeve |
| FR2702081B1 (fr) * | 1993-02-26 | 1995-05-12 | Gec Alsthom T & D Sa | Isolateur. |
| ATE138220T1 (de) * | 1993-03-12 | 1996-06-15 | Gec Alsthom T & D Ag | Verfahren zum herstellen einer kittverbindung zwischen einem isolator und einer armatur und isolatoranordnung |
| WO1995026560A1 (fr) * | 1994-03-28 | 1995-10-05 | Ngk Insulators, Ltd. | Isolateur conducteur |
-
1995
- 1995-02-02 DE DE19503324A patent/DE19503324A1/de not_active Ceased
-
1996
- 1996-01-19 CN CN96191727A patent/CN1089936C/zh not_active Expired - Fee Related
- 1996-01-19 BR BR9607580A patent/BR9607580A/pt active Search and Examination
- 1996-01-19 PL PL96321681A patent/PL178732B1/pl not_active IP Right Cessation
- 1996-01-19 AT AT96901742T patent/ATE172321T1/de not_active IP Right Cessation
- 1996-01-19 US US08/875,691 patent/US5985087A/en not_active Expired - Fee Related
- 1996-01-19 JP JP8523204A patent/JPH10513004A/ja not_active Ceased
- 1996-01-19 CZ CZ19972420A patent/CZ289279B6/cs not_active IP Right Cessation
- 1996-01-19 CA CA002212255A patent/CA2212255C/en not_active Expired - Fee Related
- 1996-01-19 ES ES96901742T patent/ES2122783T3/es not_active Expired - Lifetime
- 1996-01-19 WO PCT/EP1996/000226 patent/WO1996024144A1/de not_active Ceased
- 1996-01-19 DE DE59600669T patent/DE59600669D1/de not_active Expired - Fee Related
- 1996-01-19 EP EP96901742A patent/EP0807310B1/de not_active Revoked
- 1996-01-31 IL IL11697996A patent/IL116979A/xx not_active IP Right Cessation
- 1996-01-31 FI FI960446A patent/FI960446L/fi not_active IP Right Cessation
- 1996-02-01 ZA ZA96775A patent/ZA96775B/xx unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9624144A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0807310B1 (de) | 1998-10-14 |
| CN1172546A (zh) | 1998-02-04 |
| JPH10513004A (ja) | 1998-12-08 |
| WO1996024144A1 (de) | 1996-08-08 |
| US5985087A (en) | 1999-11-16 |
| FI960446A0 (fi) | 1996-01-31 |
| ES2122783T3 (es) | 1998-12-16 |
| BR9607580A (pt) | 1998-07-07 |
| FI960446A7 (fi) | 1996-08-03 |
| DE59600669D1 (de) | 1998-11-19 |
| PL321681A1 (en) | 1997-12-22 |
| PL178732B1 (pl) | 2000-06-30 |
| IL116979A (en) | 2000-07-16 |
| CA2212255C (en) | 2004-10-26 |
| ATE172321T1 (de) | 1998-10-15 |
| CZ289279B6 (cs) | 2001-12-12 |
| DE19503324A1 (de) | 1996-08-08 |
| FI960446L (fi) | 1996-08-03 |
| CZ242097A3 (en) | 1997-11-12 |
| IL116979A0 (en) | 1996-05-14 |
| ZA96775B (en) | 1996-08-12 |
| CN1089936C (zh) | 2002-08-28 |
| CA2212255A1 (en) | 1996-08-08 |
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