CA1060186A - Method for manufacturing an insulation for high tension devices - Google Patents
Method for manufacturing an insulation for high tension devicesInfo
- Publication number
- CA1060186A CA1060186A CA269,375A CA269375A CA1060186A CA 1060186 A CA1060186 A CA 1060186A CA 269375 A CA269375 A CA 269375A CA 1060186 A CA1060186 A CA 1060186A
- Authority
- CA
- Canada
- Prior art keywords
- band
- metal foil
- station
- weakening
- retaining
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/122—Insulating between turns or between winding layers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/26—Sheathing; Armouring; Screening; Applying other protective layers by winding, braiding or longitudinal lapping
-
- 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
- H01B17/26—Lead-in insulators; Lead-through insulators
- H01B17/28—Capacitor type
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3412—Insulators
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Insulating Of Coils (AREA)
- Insulating Bodies (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
- Laminated Bodies (AREA)
Abstract
A METHOD FOR MANUFACTURING AN INSULATION FOR
HIGH TENSION DEVICES
ABSTRACT OF THE DISCLOSURE
In the insulation of high tension devices an insulating foil is wound as a continuous band on an insulating body. A continuous metal foil band is fed to a weakening station where the band is provided with spaced weakenings transversal to the running direction of the band. This weakened metal foil band is wound between insulating foil layers on the insulating body. The metal foil band is retained at a retaining station at desired moments and for desired periods of time so that the metal foil band is torn off along one weakening which is situated, in the running direction of the band, after the retaining station and before the insulating body.
HIGH TENSION DEVICES
ABSTRACT OF THE DISCLOSURE
In the insulation of high tension devices an insulating foil is wound as a continuous band on an insulating body. A continuous metal foil band is fed to a weakening station where the band is provided with spaced weakenings transversal to the running direction of the band. This weakened metal foil band is wound between insulating foil layers on the insulating body. The metal foil band is retained at a retaining station at desired moments and for desired periods of time so that the metal foil band is torn off along one weakening which is situated, in the running direction of the band, after the retaining station and before the insulating body.
Description
The ob,ect of the invention is a method for manufacturing an insulation for high tension devices comprising insulating and metal foil layers disposed by turns one upon the other, according to which ~
method an insulating foil is wound as a continuous band on an insulation ~ ~ `
body or the like and a metal foil band is wound in between the insu-lating foil layers in separate pieces. ;;
To enable the prior art to be described with the aid of .: . ,~
drawings, the figures thereof will now be listed.
Figure 1 is a cross section of a prior art insulator;
Figure 2 is a perspective view of the method of constructing " ~ , the insulator of Figure l;
Figure 3 shows schematically an embodiment of the present `
invention in side view; and ! Figure 4 shows schematically an embodiment of control apparatus for use therewith.
The ~Zeasuring transformers according to the Finnish patents l 46,571 and 46,572, are equipped with a tubular main insulator co~Zprising ! several metal foil tube elements (a3 arranged one within the other at least partly overlapping each other and insulating tube elements (b) `~
(Fig. 1) arranged in between the metal foil tube elements~ The main insulator is produced by winding around a cylinder body (c) a thin insulating foil (d) and by disposing upon it precut insulation and/or metallized foils (e) (Fig. 2).
This method has shown the following disadvantages:
.~
~Z - The method is slow since every sheet must manually be placed in its correct place. `
- The sheets get wrinkled when winding the insulation since it .~ ~
Z is difficult to stretch the separate sheets during winding. ~ ~1 Z 30 - Due to the wrinkling, the rear edge of the metallized sheets ~ is shorter than the front edge in the direction of the .', ~, .
:1 ,.: , . . ~` : ,:, . ~
- ~ lC)~iOlB6 insulation axis. This produces angles at the ends of the ; metallizing cylinders, resulting in poorer voltage strength.
` In addition, the radial thickness of the insulation will , ,: . , ~, unduly grow because of the wrinkling.
- The cutting oi the sheets is a separate working phase, causing additional expenses.
The purpose of this invention is to eliminate the above disad~
vantages and to create a new and improved insulation method. ~
The method according to the invention is mainly characterized ;
;,' ~
:, ' '. :
.~
. ~ :
. f ., ;
, :' . ~ .
: J
!
..`f .~
:~ ~
~i I -2a-.
- , . :,, 36 ` ~
by that before the continuously fed metal foil band arrives at the insulation body, it is provided, at a special weakening station with spaced weakings transversal to the running direction of the band, and that the metal foil band is retained at a retaining station at desired moments and for desired periods of time so that the metal foil band is torn off along one weakening situated, in the running direction of the metal foil band, after said retaining station.
Special embodiments of the method according to the invention are characterized by the definitions given in the claims 2 to 5.
The invention will in the following be examined more in detail with reference to Figure 3 which shows schematically one embodiment of the method according to the invention, and to Figure 4 which shows schematically the principle of the control apparatus which `
controls the operation of the retaining and weakening devices. ;
According to the exemplifyling embodiments the metallized foil ~ `
1 is fed between the cylindrical insulation body 2 and the insulation foil 3 as a uniform band which, at one point, is weakened over the whcle width thereof. When the metallized foil 1 has completed one 1 whole rotation around the cylinder, or otherwise has reached a 1 20 desired length~ the retaining device 6 stops the running of the metallized foil~ whereat the metallized foil 1 ls torn off along the previously weakened portion. The retaining device 6 starts functioning when the previously weakened portion has just been wound into the insulation cylinder 2, whereby the end of the foil 1 that has been torn off remains for a short while between the ins~lation foil 3 acting as drawing foil and the insulation cylinder 2. The retaining device 6 retains the foil 1 until the insulation cylinder 2 has made a desired angular turn. When the retaining device 6 stops its retaining function the metallized foil 1 continues immediately to run due to friction. The winding distance can be as long as the metallized foil stands the frictional forces.
. ~:
1~:)6~ 36 The retaining devlce 6 comprises two rubber-covered plates 4 8 which, durin& the operation of the device~ are pressed together by means of electromagnetically operated levers~ The compressive force can also be effected pneumatically, hydraulically~ or by some other suitable method. The weakening device 7 is formed with several ~;
- adjacent edges 14 which cut into the foil slits~ e.g., 10 mm wide :: .
and spaced 1 mm apart. ~ ~
, ; :: ~:
The edges 14 are secured to a shaft mounted in bearings enabling the shaft to rotate. me metallized foil 1 cuts like a -secant the circle drawn by the edges 14. In Figure 3, the weakening device 7 is in its initial position, whereby the points of the edges 14 are lacated somewhat above the metallized foil. Rotation ;~
of the device is hindered by a bar 15. When the control device ;
gives a wealcening impulse, the bar 15 is removed and the shaft rotates due to compressive~ elastic or some other appropriate force~
enabling the points of the edges 14 to touch the surface of the ,.. . .
metallized foil 1. When the foil 1 moves against the edges~ they ~ ' ':
cut slits into the foil, as has been described above. After weakening, the device is returned to the initial position by , 20 continuying the movement into a complete circle. ;
' The principle of the control apparatus which controls the ~ -operation of the retaining and weakening devices is schematically --illustrated in Figure 4. A wheel 16 rotates together with the insulation cylinder to be prepared, rotating another wheel 17. Cam wheels 1~ and 19 of micro-switches which control the operation of the weakening and retaining devices rotate on a mutual shaft with the -~
.~
wheel 17. The desired control effect is achieved by ad~usting the ~! diameter ratio of the wheels 16 and 17 as well as by ad~usting the length of the cam of the cam-wheels.
As to the v riations within the scope of the inventlon, ic can ' ' ' :'' ~601~36 be mentioned that, departing from the above embodiment, the retaining device 6 and the weakening device 7 can be arrarl~ed in reverse order as far as the r~nning direction of the metal foil band il is concPrned. - :
.: . .
~' ~ 1 ' .
, . .
. 1
method an insulating foil is wound as a continuous band on an insulation ~ ~ `
body or the like and a metal foil band is wound in between the insu-lating foil layers in separate pieces. ;;
To enable the prior art to be described with the aid of .: . ,~
drawings, the figures thereof will now be listed.
Figure 1 is a cross section of a prior art insulator;
Figure 2 is a perspective view of the method of constructing " ~ , the insulator of Figure l;
Figure 3 shows schematically an embodiment of the present `
invention in side view; and ! Figure 4 shows schematically an embodiment of control apparatus for use therewith.
The ~Zeasuring transformers according to the Finnish patents l 46,571 and 46,572, are equipped with a tubular main insulator co~Zprising ! several metal foil tube elements (a3 arranged one within the other at least partly overlapping each other and insulating tube elements (b) `~
(Fig. 1) arranged in between the metal foil tube elements~ The main insulator is produced by winding around a cylinder body (c) a thin insulating foil (d) and by disposing upon it precut insulation and/or metallized foils (e) (Fig. 2).
This method has shown the following disadvantages:
.~
~Z - The method is slow since every sheet must manually be placed in its correct place. `
- The sheets get wrinkled when winding the insulation since it .~ ~
Z is difficult to stretch the separate sheets during winding. ~ ~1 Z 30 - Due to the wrinkling, the rear edge of the metallized sheets ~ is shorter than the front edge in the direction of the .', ~, .
:1 ,.: , . . ~` : ,:, . ~
- ~ lC)~iOlB6 insulation axis. This produces angles at the ends of the ; metallizing cylinders, resulting in poorer voltage strength.
` In addition, the radial thickness of the insulation will , ,: . , ~, unduly grow because of the wrinkling.
- The cutting oi the sheets is a separate working phase, causing additional expenses.
The purpose of this invention is to eliminate the above disad~
vantages and to create a new and improved insulation method. ~
The method according to the invention is mainly characterized ;
;,' ~
:, ' '. :
.~
. ~ :
. f ., ;
, :' . ~ .
: J
!
..`f .~
:~ ~
~i I -2a-.
- , . :,, 36 ` ~
by that before the continuously fed metal foil band arrives at the insulation body, it is provided, at a special weakening station with spaced weakings transversal to the running direction of the band, and that the metal foil band is retained at a retaining station at desired moments and for desired periods of time so that the metal foil band is torn off along one weakening situated, in the running direction of the metal foil band, after said retaining station.
Special embodiments of the method according to the invention are characterized by the definitions given in the claims 2 to 5.
The invention will in the following be examined more in detail with reference to Figure 3 which shows schematically one embodiment of the method according to the invention, and to Figure 4 which shows schematically the principle of the control apparatus which `
controls the operation of the retaining and weakening devices. ;
According to the exemplifyling embodiments the metallized foil ~ `
1 is fed between the cylindrical insulation body 2 and the insulation foil 3 as a uniform band which, at one point, is weakened over the whcle width thereof. When the metallized foil 1 has completed one 1 whole rotation around the cylinder, or otherwise has reached a 1 20 desired length~ the retaining device 6 stops the running of the metallized foil~ whereat the metallized foil 1 ls torn off along the previously weakened portion. The retaining device 6 starts functioning when the previously weakened portion has just been wound into the insulation cylinder 2, whereby the end of the foil 1 that has been torn off remains for a short while between the ins~lation foil 3 acting as drawing foil and the insulation cylinder 2. The retaining device 6 retains the foil 1 until the insulation cylinder 2 has made a desired angular turn. When the retaining device 6 stops its retaining function the metallized foil 1 continues immediately to run due to friction. The winding distance can be as long as the metallized foil stands the frictional forces.
. ~:
1~:)6~ 36 The retaining devlce 6 comprises two rubber-covered plates 4 8 which, durin& the operation of the device~ are pressed together by means of electromagnetically operated levers~ The compressive force can also be effected pneumatically, hydraulically~ or by some other suitable method. The weakening device 7 is formed with several ~;
- adjacent edges 14 which cut into the foil slits~ e.g., 10 mm wide :: .
and spaced 1 mm apart. ~ ~
, ; :: ~:
The edges 14 are secured to a shaft mounted in bearings enabling the shaft to rotate. me metallized foil 1 cuts like a -secant the circle drawn by the edges 14. In Figure 3, the weakening device 7 is in its initial position, whereby the points of the edges 14 are lacated somewhat above the metallized foil. Rotation ;~
of the device is hindered by a bar 15. When the control device ;
gives a wealcening impulse, the bar 15 is removed and the shaft rotates due to compressive~ elastic or some other appropriate force~
enabling the points of the edges 14 to touch the surface of the ,.. . .
metallized foil 1. When the foil 1 moves against the edges~ they ~ ' ':
cut slits into the foil, as has been described above. After weakening, the device is returned to the initial position by , 20 continuying the movement into a complete circle. ;
' The principle of the control apparatus which controls the ~ -operation of the retaining and weakening devices is schematically --illustrated in Figure 4. A wheel 16 rotates together with the insulation cylinder to be prepared, rotating another wheel 17. Cam wheels 1~ and 19 of micro-switches which control the operation of the weakening and retaining devices rotate on a mutual shaft with the -~
.~
wheel 17. The desired control effect is achieved by ad~usting the ~! diameter ratio of the wheels 16 and 17 as well as by ad~usting the length of the cam of the cam-wheels.
As to the v riations within the scope of the inventlon, ic can ' ' ' :'' ~601~36 be mentioned that, departing from the above embodiment, the retaining device 6 and the weakening device 7 can be arrarl~ed in reverse order as far as the r~nning direction of the metal foil band il is concPrned. - :
.: . .
~' ~ 1 ' .
, . .
. 1
Claims (5)
1. A method for manufacturing an insulation for high tension devices comprising insulating and metal foil layers disposed by turns one upon the other, which comprises the following steps:
(a) winding an insulating foil as a continuous band on an insulating body;
(b) feeding a continuous metal foil band to a weakening station;
(c) providing said metal foil band, at said weakening station, with spaced weakenings transversal to the running direction of the band;
(d) winding said weakened metal foil band in between insulating foil layers on said insulating body; and (e) retaining said metal foil band at a retaining station at desired moments and for desired periods of time such that the metal foil band is torn off, due to frictional forces, along one weakening situated, in the running direction of the metal foil band, after said retaining station and before the insulating body.
(a) winding an insulating foil as a continuous band on an insulating body;
(b) feeding a continuous metal foil band to a weakening station;
(c) providing said metal foil band, at said weakening station, with spaced weakenings transversal to the running direction of the band;
(d) winding said weakened metal foil band in between insulating foil layers on said insulating body; and (e) retaining said metal foil band at a retaining station at desired moments and for desired periods of time such that the metal foil band is torn off, due to frictional forces, along one weakening situated, in the running direction of the metal foil band, after said retaining station and before the insulating body.
2. A method according to Claim 1, wherein each new weakening to the metal foil band is performed at the weakening station each time the band is retained.
3. A method according to Claim 1, wherein the retaining phase is turned on immediately when the previously weakened portion has been wound into the insulation, whereat the end of the metal foil band that has been torn off remains over a short distance between the insulating foil functioning as traction foil and the insulation body.
4. A method according to Claim 1, wherein the retaining station is located after the weakening station in the running direction of the metal foil band.
5. A method according to Claim 1, wherein the retaining station is located before the weakening station in the running direction of the metal foil band.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI760204A FI51642C (en) | 1976-01-28 | 1976-01-28 | A method of making high voltage switchgear insulation consisting of alternating layers of insulating film and metal film. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1060186A true CA1060186A (en) | 1979-08-14 |
Family
ID=8509717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA269,375A Expired CA1060186A (en) | 1976-01-28 | 1977-01-10 | Method for manufacturing an insulation for high tension devices |
Country Status (15)
| Country | Link |
|---|---|
| JP (1) | JPS5293994A (en) |
| AR (1) | AR210194A1 (en) |
| BE (1) | BE850573A (en) |
| BR (1) | BR7700493A (en) |
| CA (1) | CA1060186A (en) |
| CH (1) | CH609168A5 (en) |
| DE (1) | DE2700176A1 (en) |
| DK (1) | DK34477A (en) |
| FI (1) | FI51642C (en) |
| FR (1) | FR2339942A1 (en) |
| GB (1) | GB1527324A (en) |
| IN (1) | IN143704B (en) |
| NO (1) | NO142018C (en) |
| SE (1) | SE408505B (en) |
| SU (1) | SU677688A3 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5787011A (en) * | 1980-11-19 | 1982-05-31 | Takaoka Electric Mfg Co Ltd | Method of producing insulating paper with duct |
| CH674351A5 (en) * | 1988-01-18 | 1990-05-31 | Guido Rossi Dipl Ing | |
| EP1925005B1 (en) | 2005-09-15 | 2011-02-23 | Tuboly-Astronic AG | Apparatus and method for winding electrical coils |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB640822A (en) * | 1948-09-08 | 1950-07-26 | British Thomson Houston Co Ltd | Machine for winding interleaved capacitors |
| FR1410807A (en) * | 1964-10-08 | 1965-09-10 | Zd Y Elektrotepelnych Zarizeni | Capacitor roll protected against local short circuits and method for its manufacture |
| DE2044263C3 (en) * | 1970-09-07 | 1974-10-10 | Micafil Ag, Zuerich (Schweiz) | Winding machine for high-voltage capacitor bushings |
-
1976
- 1976-01-28 FI FI760204A patent/FI51642C/en not_active IP Right Cessation
- 1976-12-31 IN IN2296/CAL/76A patent/IN143704B/en unknown
-
1977
- 1977-01-03 SE SE7700046A patent/SE408505B/en unknown
- 1977-01-04 DE DE19772700176 patent/DE2700176A1/en not_active Withdrawn
- 1977-01-10 CA CA269,375A patent/CA1060186A/en not_active Expired
- 1977-01-14 GB GB1617/77A patent/GB1527324A/en not_active Expired
- 1977-01-20 BE BE174238A patent/BE850573A/en unknown
- 1977-01-24 CH CH84477A patent/CH609168A5/en not_active IP Right Cessation
- 1977-01-24 AR AR266289A patent/AR210194A1/en active
- 1977-01-26 JP JP688677A patent/JPS5293994A/en active Pending
- 1977-01-27 BR BR7700493A patent/BR7700493A/en unknown
- 1977-01-27 FR FR7702300A patent/FR2339942A1/en not_active Withdrawn
- 1977-01-27 SU SU772446003A patent/SU677688A3/en active
- 1977-01-27 DK DK34477A patent/DK34477A/en unknown
- 1977-01-28 NO NO770300A patent/NO142018C/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FI51642B (en) | 1976-11-01 |
| NO770300L (en) | 1977-07-29 |
| AR210194A1 (en) | 1977-06-30 |
| JPS5293994A (en) | 1977-08-08 |
| FR2339942A1 (en) | 1977-08-26 |
| NO142018C (en) | 1980-06-11 |
| CH609168A5 (en) | 1979-02-15 |
| SE7700046L (en) | 1977-07-29 |
| SU677688A3 (en) | 1979-07-30 |
| DE2700176A1 (en) | 1977-07-14 |
| BR7700493A (en) | 1977-10-04 |
| GB1527324A (en) | 1978-10-04 |
| DK34477A (en) | 1977-07-29 |
| NO142018B (en) | 1980-03-03 |
| BE850573A (en) | 1977-05-16 |
| FI51642C (en) | 1977-02-10 |
| SE408505B (en) | 1979-06-11 |
| IN143704B (en) | 1978-01-14 |
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