US1869308A - Process for impregnating insulating materials - Google Patents
Process for impregnating insulating materials Download PDFInfo
- Publication number
- US1869308A US1869308A US213173A US21317327A US1869308A US 1869308 A US1869308 A US 1869308A US 213173 A US213173 A US 213173A US 21317327 A US21317327 A US 21317327A US 1869308 A US1869308 A US 1869308A
- Authority
- US
- United States
- Prior art keywords
- cable
- gas
- impregnating
- insulating
- oil
- 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 - Lifetime
Links
- 238000000034 method Methods 0.000 title description 16
- 239000011810 insulating material Substances 0.000 title description 3
- 239000007789 gas Substances 0.000 description 25
- 150000001875 compounds Chemical class 0.000 description 22
- 239000000463 material Substances 0.000 description 15
- 239000003921 oil Substances 0.000 description 12
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 10
- 239000007788 liquid Substances 0.000 description 7
- 238000005406 washing Methods 0.000 description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000005470 impregnation Methods 0.000 description 3
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
Classifications
-
- 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
- H01B13/30—Drying; Impregnating
Definitions
- the object of the present invention is a process for obtaining a perfect impregnation with insulating compounds, excluding all traces of air, in any porous material which 5 may form part, for instance, of electrical apparatus.
- This process is particularly adapted for impregnating with insulating compounds electric cables for power transmission.
- the above mentioned process consists in the following steps:
- the material to be impregnated for example the factory insulation of an electric cable, is first of all thoroughly dried by ordinary methods, and then the air is extracted from the cable as completely as possible; then a gas soluble in the oil to be used for the impregnation, carbonic acid for instance, is admitted and is subsequently extracted with a vacuum pump so that the only traces of gas remaining will be exclusively
- This gas-washing treatment may subsequently be repeated with more gas to make .sure that after the -vacuum, all the air has absolutely been extracted and only CO remains. Oil is then introduced into the cable at a convenient temperature, this oil'having the oil to be used for impregnation.
- the process can be applied with profit in a special manner in the case of electric transformers.
- a process of impregnating electric cables with oil comprising the steps of thoroughly drying the factory insulation of a cable, extracting the air from the interior of the cable,'washing the evacuated interior of the cable with a gas which is highly soluble in the oil to be used, removing such gas by vacuum action, and introducing the oil into the cable after having first been treated to remove all gases therefrom.
- a process of impregnating electric cables with oil comprising the steps of extracting the air from the interior of the cable, washing the evacuated interior of the cable with carbon dioxide, removing the carbon dioxide by vacuum action, degasifying the oil, and thereafter introducing the degasified oil into the cable. 7
- a process of impregnating porous materials with liquid insulating compounds comprising the steps of drying thoroughly the material to be impregnated, extracting the air therefrom,-introducing into the evacuated material a gas which is highly soluble in the insulating compound to be used, rem0V- ing such gas by vacuum action, and finally introducin the insulating compound into said material after having first been treated to remove all gases therefrom.
- a process of impregnating porous materials with liquid insulating compounds comprising the steps of drying thoroughly the material to be impregnated, extracting the air therefrom, introducing into the evacuated material a gas which is highly soluble in the insulating compound to be used, removing such gas by vacuum action, introducing a fresh quantity of said gas into the said material and extracting it therefrom, and finally introducing the insulating compound into said material after having first been treated to remove all gases therefrom.
- a process of impregnating porous materials with liquid insulating compounds comprising the steps of drying thoroughly the material to be impregnated, subjecting the material to a vacuum action to extract the air therefrom, washing the material with a gas which is highly soluble in the insulating compound to be used, removing such gas by vacuum action, and finally introducing the insulating compound into said material after having first been treated to remove all gases therefrom.
- a cables with liquid insulating compounds comprising the steps of subjecting-the cable ture, afterwards subjecting the insulated conductor or cable to a vacuum, subsequently subjecting the insulated conductor or cable to the action ofa de-aerated or de-gasified process of impregnating electric to be impregnated to a vacuum action to extract the air therefrom, washing the cable with carbon dioxide, removing the carbon dioxide by vacuum action, degasifying the insulating compound, and thereafter introducing the degasified insulating compound into the cable.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Of Electric Cables (AREA)
Description
Patented My 26, 1932 UNITED STATES PATENT OFFICE LUIGI EMANUELI, 0F MILAN, ITALY ASSIGNOR TO SOGIETA ITALIANA PIRELIJI, OF MILAN, ITALY PROCESS FOR .IMPREGNATING INSULATING MATERIALS No Drawing. Application filed August 15, 1927, Serial No. 213,173, and in Italy August 31, 1926.
The object of the present invention is a process for obtaining a perfect impregnation with insulating compounds, excluding all traces of air, in any porous material which 5 may form part, for instance, of electrical apparatus.
This process is particularly adapted for impregnating with insulating compounds electric cables for power transmission.
W It is based on the great solubility of some gases in the insulating compound or in the oils used in electrical apparatus and particularly in cable manufacture. Amongst said gases I may mention CO (carbonic acid);
15 (1 H, (propane); (3 H (acetylene) and generally easily liquefying gases.
The above mentioned process consists in the following steps: The material to be impregnated, for example the factory insulation of an electric cable, is first of all thoroughly dried by ordinary methods, and then the air is extracted from the cable as completely as possible; then a gas soluble in the oil to be used for the impregnation, carbonic acid for instance, is admitted and is subsequently extracted with a vacuum pump so that the only traces of gas remaining will be exclusively This gas-washing treatment may subsequently be repeated with more gas to make .sure that after the -vacuum, all the air has absolutely been extracted and only CO remains. Oil is then introduced into the cable at a convenient temperature, this oil'having the oil to be used for impregnation.
cables with liquid insulating compounds, the .steps of extracting the air from the interior For this reason the insulating oil must be previously deprived of gases. This is obtained by special apparatus operating at a. certain temperature and in vacuum.
It is evident that the process here described 5 is particularly convenient for impregnating high-tension cables, but can be used also for cables with any sort of impregnating material. Similarly it can be applied in all cases in which it is desirable to effect impregnatlon with liquid or fluid materials of given parts or apparatus particularly for electric uses so as to obtain a thorough exclusion of air.
The process can be applied with profit in a special manner in the case of electric transformers.
I claim as my invention:
1. In a process of impregnating electric of a cable, washing the evacuated interior of the cable with a gas which is hi hly soluble in the insulatingcompound to 'e used, removing such gas by vacuum action, dcg'asifying the insulating compound, and thereafter introducing the degasified insulating compound into the cable.
2. In a process of impregnating electric cables with liquid insulating compounds, the steps of extracting the air from the interior of a cable, repeatedly'introducing into and removing from the interior-of the cable a washing gas which is highly soluble in the insulating compound to be used, removing such gas by vacuum action, degasifying the insulating compound, and thereafter introducing the degasified insulating compound into the cable. v
3. A process of impregnating electric cables with oil, comprising the steps of thoroughly drying the factory insulation of a cable, extracting the air from the interior of the cable,'washing the evacuated interior of the cable with a gas which is highly soluble in the oil to be used, removing such gas by vacuum action, and introducing the oil into the cable after having first been treated to remove all gases therefrom.
4. A process of impregnating electric cables with oil, comprising the steps of extracting the air from the interior of the cable, washing the evacuated interior of the cable with carbon dioxide, removing the carbon dioxide by vacuum action, degasifying the oil, and thereafter introducing the degasified oil into the cable. 7
5. A process of impregnating porous materials with liquid insulating compounds, comprising the steps of drying thoroughly the material to be impregnated, extracting the air therefrom,-introducing into the evacuated material a gas which is highly soluble in the insulating compound to be used, rem0V- ing such gas by vacuum action, and finally introducin the insulating compound into said material after having first been treated to remove all gases therefrom.
6. A process of impregnating porous materials with liquid insulating compounds, comprising the steps of drying thoroughly the material to be impregnated, extracting the air therefrom, introducing into the evacuated material a gas which is highly soluble in the insulating compound to be used, removing such gas by vacuum action, introducing a fresh quantity of said gas into the said material and extracting it therefrom, and finally introducing the insulating compound into said material after having first been treated to remove all gases therefrom.
7. A process of impregnating porous materials with liquid insulating compounds, comprising the steps of drying thoroughly the material to be impregnated, subjecting the material to a vacuum action to extract the air therefrom, washing the material with a gas which is highly soluble in the insulating compound to be used, removing such gas by vacuum action, and finally introducing the insulating compound into said material after having first been treated to remove all gases therefrom.
8. A cables with liquid insulating compounds, comprising the steps of subjecting-the cable ture, afterwards subjecting the insulated conductor or cable to a vacuum, subsequently subjecting the insulated conductor or cable to the action ofa de-aerated or de-gasified process of impregnating electric to be impregnated to a vacuum action to extract the air therefrom, washing the cable with carbon dioxide, removing the carbon dioxide by vacuum action, degasifying the insulating compound, and thereafter introducing the degasified insulating compound into the cable.
9. In the manufacture of electric cables of the kind'concerned, covering the conductor or cable with a fibrous or porous insulating material constituting the main insulation thereof, subjecting the insulation on the conductor or cable to a gas soluble in an impregnating material used in its manufac-
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT1869308X | 1926-08-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1869308A true US1869308A (en) | 1932-07-26 |
Family
ID=11434763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US213173A Expired - Lifetime US1869308A (en) | 1926-08-31 | 1927-08-15 | Process for impregnating insulating materials |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1869308A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2912382A (en) * | 1957-09-05 | 1959-11-10 | Gen Electric | Electrical insulating structure and method of making the same |
-
1927
- 1927-08-15 US US213173A patent/US1869308A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2912382A (en) * | 1957-09-05 | 1959-11-10 | Gen Electric | Electrical insulating structure and method of making the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10315331B2 (en) | Thermo treatment process for wood | |
| US1869308A (en) | Process for impregnating insulating materials | |
| US2390823A (en) | Apparatus for impregnating electric | |
| US2095760A (en) | Electrographitic brush processing | |
| US1941913A (en) | Electric cable | |
| US2120306A (en) | Wire covering for high frequency circuits | |
| GB276985A (en) | Improvements in or relating to processes for impregnating insulating materials | |
| Clark | Chemical changes affecting the stability of cellulose insulation | |
| US2356076A (en) | Porous brush and method of manufacture | |
| US1572905A (en) | Impregnating wood | |
| US1576253A (en) | Artificial fuel and the process of making it | |
| US806696A (en) | Method of insulating. | |
| US2095800A (en) | Electrographitic brush processing | |
| US2250032A (en) | Manufacture of electric cables | |
| US1872358A (en) | Insulating material | |
| US2699404A (en) | Process for making electrical contact brushes containing calcium carbonate | |
| DE496887C (en) | Process for the production of casting compounds for cable accessory parts | |
| US2096888A (en) | Process of saturating fibrous conduits | |
| US2026316A (en) | Impregnation of insulating materials | |
| US2170628A (en) | Process of refining lubricating oils | |
| US862454A (en) | Saturating fibrous material. | |
| US2391687A (en) | Stabilization of electric condensers | |
| US284098A (en) | Insulating material and preparation of the same | |
| GB553569A (en) | Gaseous insulating dielectric | |
| SU73498A1 (en) | The method of impregnation of the windings of electrical machines and apparatus |