CA1088643A - Flange ring structure for mounting insulator in gas- insulated transmission system - Google Patents
Flange ring structure for mounting insulator in gas- insulated transmission systemInfo
- Publication number
- CA1088643A CA1088643A CA278,938A CA278938A CA1088643A CA 1088643 A CA1088643 A CA 1088643A CA 278938 A CA278938 A CA 278938A CA 1088643 A CA1088643 A CA 1088643A
- Authority
- CA
- Canada
- Prior art keywords
- welding
- rings
- face
- welding rings
- adjacent
- 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
Landscapes
- Insulators (AREA)
- Installation Of Bus-Bars (AREA)
Abstract
FLANGE RING STRUCTURE FOR MOUNTING INSULATOR IN GAS-INSULATED
TRANSMISSION SYSTEM
ABSTRACT OF THE DISCLOSURE
An insulator is mounted within the grounded housing of a gas-insulated system by being clamped between rings welded to the opposite ends of two respective enclosure sections and the rings are secured together at their outer periphery by a weld bead. One welding ring has a ledge at its outer diameter telescoping over the outer diameter of the other welding ring.
TRANSMISSION SYSTEM
ABSTRACT OF THE DISCLOSURE
An insulator is mounted within the grounded housing of a gas-insulated system by being clamped between rings welded to the opposite ends of two respective enclosure sections and the rings are secured together at their outer periphery by a weld bead. One welding ring has a ledge at its outer diameter telescoping over the outer diameter of the other welding ring.
Description
BACKGROUND OF THE INVENTION
This invention relates to gas-insulated high-voltage, high power transmission lines and more specifically relates to a novel flange ring construction for securing an outer periphery of a support insulator to the gas-filled enclosure of the system.
High voltage gas-insulated transmission lines are well known in the art and generally consist of a central conductor which is carried within a gas-filled enclosure by a support insulator, which may have a disc or conical con-figuration. The support insulator will have a central opening which receives the central conductor with fixed or sliding engagement, and the outer periphery of the insulator is fixed to the outer enclosure.
Typical prior art arrangements for supporting the central conductor within its grounded housing are shown in U.S. Patent 3,813,475, entitled "Grounded Gas-Insulated Bus Enclosure-Combined Enclosure Joint Backup Ring and Contamination Control Device" and in U.S. Patent 3,886,301, entitled Plug-In Joint For High Current Conductors in Gas-Insulated Transmission Systems, both in the n:me of John C. Cronin.
. , .
A
.' , , ' ' ~
' ;~ ' .
~88643 In the above arrangements, the housings are relatively large in diameter, for example, 20", and the encl~sure material, which may be of aluminum, having a thickness of about 1/4", is relatively flexible. Though the connection of the rigid insulation support to the interior of the enclosure is complex and has required effective support structures.
BRIE~ DESCRIPTION OF THE PRESENT INVENTION
.
The principle o~ the present invention is to provide a novel isulator support structure, whereby the insulator outer periphery is clamped between the opposing ends of two housing sections. Two relatively heavy weld rings are welded to the respective ends of the two housing sections and these two rings have internal diameter clamping shouIders which clamp against the outer periphery of the insulator, thereby to hold it in position. The rings also engage one another in surface-to-surface engagement and are secured to one another by a welding bead, which extends around the outer periphery of the rings. Preferably, a compressible seal ring is placed between the rings and against the outer periphery of the insulator to form a gas-tight seal, and to prevent contami-nation products created during the welding from entering the interior of the enclosure, which is to be kept as clean as possible.
; Preferably, the welding rings may be arranged to have a short overlapping relationship at their external periphery in the manner of a bell and spigot joint to center the rings relative to one another during assembly.
The use of the relatively large cross-sectional area welding rings is useful in making the enclosure more rigid at its ends to insure alignment with an adjacent enclosure section than it would be if it were entirely self-supporting.
BRIEF DESCRIPTION OF TH~ DRAWINGS
.. . .
~ Figure 1 is a cross-sectional view along the - length of a gas-insulated bus in which the supporting in-sulator is supported in accordance with the present inven-tion.
Pigure 2 is a cross-sectional view of Figure 1 taken across the section line 2-2 of Figure 1.
Figure 3 shows a second embodiment of the inven-tion wherein the support insulator also serves as a gas barrier and wherein the support insulator is slidably connected to the central conductor.
,:
Figure 4 is a cross-sectional view of one of the welding rings used in Figures 1 and 3.
- Figure 5 is a cross-sectional view of the other of the welding rings shown in Figures 1 and 3.
; Figure 6 is a cross-sectional view of a welding ~, ring similar to that of Figure 5 wherein the welding ring is ; provided with an annular seal-receiving groove in one of its faces.
DETAILED DESCRIPTION OF THE DRAWINGS
Referring first to Figures 1 and 2, there is ` disclosed a section of a gas-insulated transmission line which is adapted for carrying electrical power in a high-voltage transmission system and wherein the line can be rated at 345,000 volts. Note that the invention is also applicable in gas-insulated substation application. The transmission line generally comprises a central high-voltage conductor 10 which is supported within the interior of an enclosure 11 by a conical insulator support 12. In the transmission line, a plurality of spaced insulator supports, identical in con-struction to insulator 12, may be used. The conical insulator 12 in Figures 1 and 2 could be replaced by other insulator shapes, such as disc-shaped insulators or the like.
1~88643 , The insulator 12 in Figures 1 and 2 is of the sliding type in that insulator 12 slidably engages the outer diameter of conductor 12. Thus, disc 12 has a conductive aluminum insert 13 molded therein, which receives spaced rings 14 and 15 which may be made of polytetrafluoroethylene.
Rings 14 and 15 secure the internal diameter of insulator 12 to the conductor 10 and enable easy sliding of the insulator 12 relative to conductor 10, due to dimensional changes in the transmission line due to temperature change and the like. A flat conductive spring member 16 is provided between rings 14 and 15 to make electrical connection be-tween conductive insert 13 and conductor 10.
The insulator 12 is also shown in Figures 1 and 2 as having gas passages 20 to 27 to enable the circulation of gas past the insulator 12. Th~s, the interior of conductive ~! housing 11, which may be of aluminum, is filled with a suit- -able electronegative gas, such as sulfur hexafluoride, at a pressure of about 60 p.s.i.g.
In accordance with the present invention, a novel Z0 support structure is provided for fixing the insulator 12 within the housing 11. Thus, in accordance with the inven-tion, the housing 11 is separated into two halves 30 and 31.
Relatively massive large cross-sectional area welding rings 32-33 are then welded to the ends of housing sections 30 and 31, as shown in Figure 1. Welding ring 32 is shown, before welding, in Figure 4, and welding ring 33 is shown before welding, in Figure 5. As shown in Figure 1, welding ring 32 is welded to enclosure 30 by the weld beads 40 and 41, while 1~ 8~ ~3 the welding ring 33 is welded to enclosure section 31 by ~he weld beads 42 and 43.
The welding rings 32 and 33 are so constructed that they define two internal shoulder regions 44 and 45 respectively, for clamping on the sides of upwardly extending peripheral ridge 46 of the insulator 12. The shoulder 44 is defined, in part, by the chamfer 47 in ring 33 which exposes only the lower portion of the side of ring 32.
Rings 32 and 33 are further constructed so that they define a short bell and spigot arrangement for positioning the rings relative to one another, when they are brought together and clamped against the outer periphery of insulator 12. Thus, in Figures 1, 4 and 5, ring 32 has a reduced diameter shoulder 50 and ring 33 has a projecting ledge 51, which overlaps shoulder 50,thereby to automatically centrally locate the rings relative to one another when they are brought together.
The two rings and thus the enclosure sections are joined together, and clamp insulator 12 in place, by a single weld bead 55 extending around the outer junction between rings 32 and 33. Preferably, a compressible O-ring seal 56 is captured beneath chamfer 47 and is pressed against outer periphery 46 of insulator 12 and against shoulder 44 of ring 32, in order to provide a seal against entry of welding flux or contaminants created during the formation of weld bead 55.
Figure 3 shows a second embodiment of the invention wherein all of the numerals given in Figures 1 and 2 identify similar components in Figure 3. In the arrangement of Figure 3, an additional seal 60 is provided between shoulder 45 of ring 33 and the extending periphery 46 of insulator 12.
1~86~3 Moreover,in the ~rrangement of Figure 3, the insulator is shown as a complete gas barrier without openings and, further, the insu}ator is fixed to the conductor 10. Thus, in Figure 3, the interior diameter of aluminum insert 70 is fixed to conductor 10 as by an epoxy cement 71. Preferably, the epoxy cement 71 is a conductive cement, and may have an aluminum or conductive particle filler or the like, to insure good electrical connection between conductor 10 and insert 70.
A still further embodiment of the invention is shown in Figure 6, which shows a ring 80, which can replace rIng 33 in the embodiments of Figures 1 and 3. Thus, the ring 80 of Figure 6 is not provided with the chamfer 47 of ring 33, but rather has an annular notch 81 in the surface which faces ring 32.
The notch 81 is then adapted to receive a sealing 0-ring 83, which will be pressed against the opposing surface of ring 32 in Figures 1 and 3, when the rings are brought together and are welded to one another.
In the foregoing this invention has been described in connection only with illustrative embodiments thereof.
Since many variations and modifications of this invention will now be obvious to those skilled in the art,it is preferred that the scope of this disclosure be limited not by the specific illustrative embodiments herein set forth but only by the appended claims.
.
This invention relates to gas-insulated high-voltage, high power transmission lines and more specifically relates to a novel flange ring construction for securing an outer periphery of a support insulator to the gas-filled enclosure of the system.
High voltage gas-insulated transmission lines are well known in the art and generally consist of a central conductor which is carried within a gas-filled enclosure by a support insulator, which may have a disc or conical con-figuration. The support insulator will have a central opening which receives the central conductor with fixed or sliding engagement, and the outer periphery of the insulator is fixed to the outer enclosure.
Typical prior art arrangements for supporting the central conductor within its grounded housing are shown in U.S. Patent 3,813,475, entitled "Grounded Gas-Insulated Bus Enclosure-Combined Enclosure Joint Backup Ring and Contamination Control Device" and in U.S. Patent 3,886,301, entitled Plug-In Joint For High Current Conductors in Gas-Insulated Transmission Systems, both in the n:me of John C. Cronin.
. , .
A
.' , , ' ' ~
' ;~ ' .
~88643 In the above arrangements, the housings are relatively large in diameter, for example, 20", and the encl~sure material, which may be of aluminum, having a thickness of about 1/4", is relatively flexible. Though the connection of the rigid insulation support to the interior of the enclosure is complex and has required effective support structures.
BRIE~ DESCRIPTION OF THE PRESENT INVENTION
.
The principle o~ the present invention is to provide a novel isulator support structure, whereby the insulator outer periphery is clamped between the opposing ends of two housing sections. Two relatively heavy weld rings are welded to the respective ends of the two housing sections and these two rings have internal diameter clamping shouIders which clamp against the outer periphery of the insulator, thereby to hold it in position. The rings also engage one another in surface-to-surface engagement and are secured to one another by a welding bead, which extends around the outer periphery of the rings. Preferably, a compressible seal ring is placed between the rings and against the outer periphery of the insulator to form a gas-tight seal, and to prevent contami-nation products created during the welding from entering the interior of the enclosure, which is to be kept as clean as possible.
; Preferably, the welding rings may be arranged to have a short overlapping relationship at their external periphery in the manner of a bell and spigot joint to center the rings relative to one another during assembly.
The use of the relatively large cross-sectional area welding rings is useful in making the enclosure more rigid at its ends to insure alignment with an adjacent enclosure section than it would be if it were entirely self-supporting.
BRIEF DESCRIPTION OF TH~ DRAWINGS
.. . .
~ Figure 1 is a cross-sectional view along the - length of a gas-insulated bus in which the supporting in-sulator is supported in accordance with the present inven-tion.
Pigure 2 is a cross-sectional view of Figure 1 taken across the section line 2-2 of Figure 1.
Figure 3 shows a second embodiment of the inven-tion wherein the support insulator also serves as a gas barrier and wherein the support insulator is slidably connected to the central conductor.
,:
Figure 4 is a cross-sectional view of one of the welding rings used in Figures 1 and 3.
- Figure 5 is a cross-sectional view of the other of the welding rings shown in Figures 1 and 3.
; Figure 6 is a cross-sectional view of a welding ~, ring similar to that of Figure 5 wherein the welding ring is ; provided with an annular seal-receiving groove in one of its faces.
DETAILED DESCRIPTION OF THE DRAWINGS
Referring first to Figures 1 and 2, there is ` disclosed a section of a gas-insulated transmission line which is adapted for carrying electrical power in a high-voltage transmission system and wherein the line can be rated at 345,000 volts. Note that the invention is also applicable in gas-insulated substation application. The transmission line generally comprises a central high-voltage conductor 10 which is supported within the interior of an enclosure 11 by a conical insulator support 12. In the transmission line, a plurality of spaced insulator supports, identical in con-struction to insulator 12, may be used. The conical insulator 12 in Figures 1 and 2 could be replaced by other insulator shapes, such as disc-shaped insulators or the like.
1~88643 , The insulator 12 in Figures 1 and 2 is of the sliding type in that insulator 12 slidably engages the outer diameter of conductor 12. Thus, disc 12 has a conductive aluminum insert 13 molded therein, which receives spaced rings 14 and 15 which may be made of polytetrafluoroethylene.
Rings 14 and 15 secure the internal diameter of insulator 12 to the conductor 10 and enable easy sliding of the insulator 12 relative to conductor 10, due to dimensional changes in the transmission line due to temperature change and the like. A flat conductive spring member 16 is provided between rings 14 and 15 to make electrical connection be-tween conductive insert 13 and conductor 10.
The insulator 12 is also shown in Figures 1 and 2 as having gas passages 20 to 27 to enable the circulation of gas past the insulator 12. Th~s, the interior of conductive ~! housing 11, which may be of aluminum, is filled with a suit- -able electronegative gas, such as sulfur hexafluoride, at a pressure of about 60 p.s.i.g.
In accordance with the present invention, a novel Z0 support structure is provided for fixing the insulator 12 within the housing 11. Thus, in accordance with the inven-tion, the housing 11 is separated into two halves 30 and 31.
Relatively massive large cross-sectional area welding rings 32-33 are then welded to the ends of housing sections 30 and 31, as shown in Figure 1. Welding ring 32 is shown, before welding, in Figure 4, and welding ring 33 is shown before welding, in Figure 5. As shown in Figure 1, welding ring 32 is welded to enclosure 30 by the weld beads 40 and 41, while 1~ 8~ ~3 the welding ring 33 is welded to enclosure section 31 by ~he weld beads 42 and 43.
The welding rings 32 and 33 are so constructed that they define two internal shoulder regions 44 and 45 respectively, for clamping on the sides of upwardly extending peripheral ridge 46 of the insulator 12. The shoulder 44 is defined, in part, by the chamfer 47 in ring 33 which exposes only the lower portion of the side of ring 32.
Rings 32 and 33 are further constructed so that they define a short bell and spigot arrangement for positioning the rings relative to one another, when they are brought together and clamped against the outer periphery of insulator 12. Thus, in Figures 1, 4 and 5, ring 32 has a reduced diameter shoulder 50 and ring 33 has a projecting ledge 51, which overlaps shoulder 50,thereby to automatically centrally locate the rings relative to one another when they are brought together.
The two rings and thus the enclosure sections are joined together, and clamp insulator 12 in place, by a single weld bead 55 extending around the outer junction between rings 32 and 33. Preferably, a compressible O-ring seal 56 is captured beneath chamfer 47 and is pressed against outer periphery 46 of insulator 12 and against shoulder 44 of ring 32, in order to provide a seal against entry of welding flux or contaminants created during the formation of weld bead 55.
Figure 3 shows a second embodiment of the invention wherein all of the numerals given in Figures 1 and 2 identify similar components in Figure 3. In the arrangement of Figure 3, an additional seal 60 is provided between shoulder 45 of ring 33 and the extending periphery 46 of insulator 12.
1~86~3 Moreover,in the ~rrangement of Figure 3, the insulator is shown as a complete gas barrier without openings and, further, the insu}ator is fixed to the conductor 10. Thus, in Figure 3, the interior diameter of aluminum insert 70 is fixed to conductor 10 as by an epoxy cement 71. Preferably, the epoxy cement 71 is a conductive cement, and may have an aluminum or conductive particle filler or the like, to insure good electrical connection between conductor 10 and insert 70.
A still further embodiment of the invention is shown in Figure 6, which shows a ring 80, which can replace rIng 33 in the embodiments of Figures 1 and 3. Thus, the ring 80 of Figure 6 is not provided with the chamfer 47 of ring 33, but rather has an annular notch 81 in the surface which faces ring 32.
The notch 81 is then adapted to receive a sealing 0-ring 83, which will be pressed against the opposing surface of ring 32 in Figures 1 and 3, when the rings are brought together and are welded to one another.
In the foregoing this invention has been described in connection only with illustrative embodiments thereof.
Since many variations and modifications of this invention will now be obvious to those skilled in the art,it is preferred that the scope of this disclosure be limited not by the specific illustrative embodiments herein set forth but only by the appended claims.
.
Claims (3)
1. In a gas-insulated high-voltage power transmission system, a central elongated high-voltage conductor, an elongated gas-filled grounded enclosure enclosing said central conductor, a plurality of support insulators generally conical in cross-sections and each having a central opening and a circular external periphery; said central opening centrally receiving said central conductor for supporting said central conductor within said grounded enclosure; said grounded enclosure comprising a plurality of sections aligned end-to-end, each of said sections having a first and a second welding ring welded to a first and a second end, respectively, of said section, said sections being aligned with said first welding ring of each section being adjacent and face-to-face with said second welding ring of an adjacent section; said welding rings having a cross-sectional area sufficient to make said welding rings self-supporting; each of said welding rings having a shoulder on its interior diameter, the shoulder of each of said first welding rings being adjacent and face-to-face with the shoulder of the adjacent one of said second welding rings;
each pair of adjacent, face-to-face ones of said shoulders clamping against opposite sides of said external periphery of a respective one of said support insulators; each of said second welding rings having a ledge member extending from the outer diameter thereof; said ledge member telescoping over the outer diameter of each of said first welding rings, thereby to center, relative to one another, the first and second welding rings of each pair of adjacent face-to-face welding rings; a respective weld bead extending around the outer periphery of each of said pairs of adjacent face-to-face welding rings and over said ledge member, at the junction between said pair of welding rings to join said pair of welding rings and the corresponding pair of adjacent enclosure sections together and to clamp said respective support insulator to said grounded enclosure; a respective circular sealing ring disposed between the facing surfaces of each of said pairs of welding rings and compressed therebetween;
said sealing rings further compressed against said external periphery of the respective one of said support insulators.
each pair of adjacent, face-to-face ones of said shoulders clamping against opposite sides of said external periphery of a respective one of said support insulators; each of said second welding rings having a ledge member extending from the outer diameter thereof; said ledge member telescoping over the outer diameter of each of said first welding rings, thereby to center, relative to one another, the first and second welding rings of each pair of adjacent face-to-face welding rings; a respective weld bead extending around the outer periphery of each of said pairs of adjacent face-to-face welding rings and over said ledge member, at the junction between said pair of welding rings to join said pair of welding rings and the corresponding pair of adjacent enclosure sections together and to clamp said respective support insulator to said grounded enclosure; a respective circular sealing ring disposed between the facing surfaces of each of said pairs of welding rings and compressed therebetween;
said sealing rings further compressed against said external periphery of the respective one of said support insulators.
2. The system of Claim 1 wherein said support in-sulator is slidable relative to said central conductor.
3. The system of Claim 1 wherein said support in-sulator is fixed on said central conductor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US77745477A | 1977-03-14 | 1977-03-14 | |
| US777,454 | 1977-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1088643A true CA1088643A (en) | 1980-10-28 |
Family
ID=25110304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA278,938A Expired CA1088643A (en) | 1977-03-14 | 1977-05-20 | Flange ring structure for mounting insulator in gas- insulated transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1088643A (en) |
-
1977
- 1977-05-20 CA CA278,938A patent/CA1088643A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5571990A (en) | Gas-insulated single-phase cable for transporting electricity | |
| US3365537A (en) | Waterproof thru-bolt joint for joining adjacent sections of an electric power busway | |
| CA1079372A (en) | Wall mounted interconnector | |
| US3104276A (en) | Through-bolt joint for bus duct | |
| US3796821A (en) | High voltage cable termination | |
| US4161621A (en) | Spacer mount for a gas insulated transmission line | |
| US9484729B2 (en) | Electrical equipment including a conductor mounting between two casing portions | |
| US3448202A (en) | Enclosed electric power transmission conductors | |
| US3944716A (en) | Elastomeric contamination seal | |
| US3573342A (en) | Compressed-gas-insulated high voltage electrical conductor utilizing preassembled lengths joined by field-welded expansion joints | |
| US2469445A (en) | Bus bar housing | |
| US4550219A (en) | Modularly constructed gas-insulated transmission line, and method of assembling same | |
| CA1088643A (en) | Flange ring structure for mounting insulator in gas- insulated transmission system | |
| US2835723A (en) | Telescopic inspection sections for bus enclosures | |
| US4556755A (en) | Insulating spacer design for a modular gas-insulated transmission line | |
| US3639671A (en) | Filter arrangement in compressed-gas-insulated electrical conductors | |
| CA1045797A (en) | Method of fabricating compressed gas insulated cable | |
| US3692921A (en) | Cable coupler | |
| US20230253768A1 (en) | Flange design for high-voltage gas-insulated switchgear (gis), busbars and lines (gil) | |
| US4366339A (en) | Semi-flexible gas-insulated transmission line using electric field stress shields | |
| CA1133078A (en) | Corrugated outer sheath gas-insulated transmission line | |
| US5301422A (en) | Apparatus for joining transmission cables | |
| US2591386A (en) | Insulated sectionalized bus duct system | |
| US2647940A (en) | Metal enclosed bus with adjustable bus clamping means | |
| US3692923A (en) | Flexible sealed housing for isolated phase bus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |