GB2068650A - Overhead electric traction system - Google Patents
Overhead electric traction system Download PDFInfo
- Publication number
- GB2068650A GB2068650A GB8102489A GB8102489A GB2068650A GB 2068650 A GB2068650 A GB 2068650A GB 8102489 A GB8102489 A GB 8102489A GB 8102489 A GB8102489 A GB 8102489A GB 2068650 A GB2068650 A GB 2068650A
- Authority
- GB
- United Kingdom
- Prior art keywords
- overhead
- elements
- electric traction
- traction system
- flexible
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60M—POWER SUPPLY LINES, AND DEVICES ALONG RAILS, FOR ELECTRICALLY- PROPELLED VEHICLES
- B60M1/00—Power supply lines for contact with collector on vehicle
- B60M1/12—Trolley lines; Accessories therefor
- B60M1/20—Arrangements for supporting or suspending trolley wires, e.g. from buildings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
An overhead electric traction system has, at spaced positions along its route, a light and simple support structure comprising two transversely spaced rigid poles 21 and, extending between and secured to these poles, a tensioned wire beam 22 comprising two flexible cables 23 positioned one above and spaced from the other and, securing the cables together, vertically disposed compression elements 24 and/or tension elements 25 attached to the cables at spaced positions along their lengths. The cables 23 are so secured to the poles 21 that the cables are in tension. The vertically disposed elements 24, 25 may be rigid rods or tubes, e.g. resin bonded glass fibre, flexible cables, or a combination of rods or tubes and flexible cables. Contact wires 28 may be suspended from, and catenary wires 30 may be supported on vertically disposed elements 26. <IMAGE>
Description
SPECIFICATION
Overhead electric traction systems
This invention relates to overhead electric traction systems of the kind in which current is collected from an overhead contact wire by means of a collector comprising a shoe or bar extending transversely of the contact wire, which collector, in its operative position, is pressed upwards into contact with the underside of the contact wire, usually, but not in all cases, by a spring-loaded pantograph mechanism on which the collector is supported and which is mounted on the roof of a vehicle.The invention is concerned both with overhead electric traction systems of this kind in which a vehicle or vehicles travel along a permanent track or permanent tracks, such as a railway or tramway system, and with overhead electric traction systems of this kind in which a vehicle or vehicles travel along a road or other carriageway without the restraint of a permanent track, such as a trolley-bus system.
It is an object of the present invention to provide, in an overhead electric traction system of the aforesaid kind, an overhead structure for supporting a contact wire or contact wires, which overhead support structure is lighter and simpler in construction, is easier to install and maintain, and is therefore substantially less expensive than comparable overhead support structures of known form.
According to the invention in the improved overhead electric traction system, at at least one of a plurality of positions spaced along the route of the system the contact wire or wires is or are supported by an overhead structure comprising at least two transversely spaced substantially rigid upstanding members and, extending between and secured to said upstanding members, a transversely extending beam comprising at least two flexible elongate elements positioned one above and spaced from the other and, securing the flexible elements together, a plurality of substantially vertically disposed compression and/or tension elements attached to the flexible elements at spaced positions along their lengths, the flexible elements being so secured to said transversely spaced upstanding members that the flexible elements are in tension.
Depending on the width of the span to be bridged by the overhead support structure and/or the weight of the contact wire or wires and the ancillary equipment, the substantially vertically disposed elements attached to the transversely extending flexible elements at spaced positions along their lengths may all be substantially rigid compression or tension members or may all be flexible tension elements but, for extra wide spans, the beam of the overhead support structure may be of compound form in which, over an intermediate part of the lengths of the transversely extending flexible elements, the substantially vertically disposed elements are substantially rigid compression members and over end parts of the lengths of the flexible elements, the substantially vertically disposed elements are flexible or substantially rigid tension elements.
Each transversely extending flexible elongate eiement is preferably a plurality of wires of high tensile steel or other metal or metal alloy stranded together but, in some circumstances, each flexible elongate element may be a plurality of filaments of glass fibre or other inorganic material stranded together.
Where some or all of the substantially vertically disposed elements of the beam are substantially rigid compression or tension members, each is preferably a substantially rigid rod or tube of resin bonded glass fibre or other resin bonded fibrous inorganic material, but it may be a rod, tube or other elongate member of metal or metal alloy, or of glass, ceramic or other electrically insulating material.
Where some or all of the substantially vertically disposed elements of the beam are flexible tension elements, each is preferably a plurality of wires of high tensile steel or other metal or metal alloy stranded together or a plurality of filaments of glass fibre or other inorganic material stranded together.
In all cases, preferably the substantially vertically disposed elements of the beam are so attached to the transversely extending flexible elongate elements that substantial movement of a vertically disposed element along a flexible elongate element is prevented.
The contact wire or contact wires and, where present the associated catenary wire or wires, may be suspended from and supported by an overhead support structure of the present invention in any convenient manner and, in some circumstances, steady arms of known form may be employed. For reasons of simplicity and economy, however, where some or all of the substantially vertically disposed elements of the beam are substantially rigid compression or tension members, preferably the or each contact wire is suspended from the lowermost end of a vertically disposed substantially rigid compression or tension member of resin bonded glass fibre or other electrically insulating material and the or each catenary wire is supported on the uppermost end of such a compression or tension member.For these purposes, preferably the or each compression or tension.member by which a contact wire and/or catenary wire is or are to be supported protrudes downwardly below and/or upwardly above the transversely extending flexible elongate members to which it is attached.
In all cases where the beam includes substantially vertically disposed substantially rigid compression or tension members attached to the transversely extending flexible elongate elements, preferably each compression or tension member has spaced from both its ends, holes through which the flexible elongate elements pass; preferably, also, the compression or tension members are clamped to the flexible elongate elements by wedges driven into the holes or by other means. Alternatively, each compression or tension member may be secured to the flexible elongate elements by U-bolts, J-bolts or by any other suitable means.
Each substantially rigid upstanding member may be a pole, a column, a steel lattice-work structure, the side wall of a cutting or any other suitable substantially rigid upstanding structure capable of supporting the transversely extending beam.
The invention is further illustrated by a description, by way of example, of three forms of overhead support structure for use in an overhead electric traction system, with reference to the accompanying drawings, in which:
Figure 1 is a diagrammatic representation of a first form of overhead support structure;
Figure 2 is a diagrammatic representation of a second form of overhead support structure, and
Figure 3 is a diagrammatic representation of a third form of overhead support structure.
Referring to Figure 1,the overhead support structure comprises two transversely spaced rigid upstanding poles 1 and, extending between and secured to the poles, a tensioned wire beam 2. The tensioned wire beam 2 comprises two flexible steel stranded cables 3, one positioned above and spaced from the other and both so secured to the poles that they are in tension and, securing the cables together, a plurality of vertically disposed rigid tubes 4 of resin bonded glass fibre attached to the cables 3 at spaced positions along their lengths and constituting compression members. Each tube 4 has spaced from both of its ends holes through which the cables 3 pass, the tubes 4 being clamped to the cables 3 by wedges (not shown) driven into the holes.Two of the tubes 4 protrude downwardly below and upwardly above the cables 3 and each of these tubes has at its lowermost end a fitting 5 from which a contact wire 6 is suspended; at the uppermost end of each of these tubes is a fitting 7 which supports a catenary wire 8.
The overhead support structure shown in Figure 2 comprises two transversely spaced rigid upstanding poles 11 and, extending between and secured to the poles, a tensioned wire beam 12. The beam 12 comprises two flexible steel stranded cables 13 which are so secured to the poles 11 that the cables are in tension and, attached to the cables at spaced positions along their lengths by fittings 15, a plurality of vertically disposed flexible steel stranded cables 14. Two tubes 16 of resin bonded glass fibre are secured to the cables 13 in the same manner as the tubes 4 in the overhead support structure shown in Figure 1 and protrude downwardly below and upwardly above the cables 13. Each tube 16 has, at its lowermost end, a fitting 17 from which a contact wire 18 is suspended and has, at its uppermost end, a fitting 19 which supports a catenary wire 20.
The overhead support structure shown in Figure 3 comprises two transversely spaced rigid upstanding
poles 21 and, extending between and secured to the
poles, a tensioned wire beam 22 of compound form.
The beam 22 comprises two flexible steel stranded cables 23, each so secured to the poles 21 that it is in tension. Over an intermediate part of the lengths of the cables 23, a plurality of vertically disposed rigid tubes 24 of resin bonded glass fibre are attached to the cables at spaced positions along the intermedi
ate part and, at end parts of the cables 23, the cables
are secured together by vertically disposed flexible
steel stranded cables 25. Two tubes 26 of resin
bonded glass fibre are secured to the cables 23 in the
intermediate part of their lengths in the same
manner as the tubes 4 in the overhead support structure shown in Figure 1 and protrude downwardly below and upwardly above the cables 23. Each tube 26 has, at its lowermost end, a fitting 27 from which a contact wire 28 is suspended and has, at its uppermost end, a fitting 29 which supports a catenary wire 30.
Claims (20)
1. An overhead electric traction system of the kind in which current is collected from an overhead contact wire by means of a collector carried on the roof of a vehicle and comprising a shoe or bar extending transversely of the contact wire, which collector, in its operative position, is pressed upwards into contact with the underside of the contactwire, wherein, at at least one of a plurality of positions spaced along the route of the system, a contact wire or wires is or are supported by an overhead structure comprising at least two transversely spaced substantially rigid upstanding members and, extending between and secured to said upstanding members, a transversely extending beam comprising at least two flexible elongate elements positioned one above and spaced from the other and, securing the flexible elements together, a plurality of substantially vertically disposed compression and/or tension elements attached to the flexible elements at spaced positions along their lengths, the flexible elements being so secured to said transversely spaced upstanding members that the flexible elements are in tension.
2. An overhead electric traction system as claimed in Claim 1, wherein the substantially vertically disposed elements attached to the transversely extending flexible elements of the overhead structure or of at least one of the overhead structures are all substantially rigid compression or tension members.
3. An overhead electric traction system as claimed in Claim 1, wherein the substantially vertically disposed elements attached to the transversely extending flexible elements of the overhead structure or of at least one of the overhead structures are all substantially flexible tension elements.
4. An overhead electric traction system as claimed in Claim 1, wherein the transversely extending beam of the overhead structure or of at least one of the overhead structures is of compound form in which, over an intermediate part of the lengths of the transversely extending flexible elements, the substantially vertically disposed elements are substantially rigid compression members and over end parts of the lengths of the flexible elements, the substantially vertically disposed elements are flexible or substantially rigid tension elements.
5. An overhead electric traction system as claimed in Claim 2 or 4, wherein each substantially rigid compression or tension member of the or each overhead structure is a substantially rigid rod or tube of resin glass fibre or other resin bonded fibrous inorganic material.
6. An overhead electric traction system as claimed in Claim 2 or 4, wherein each substantially rigid compression or tension member of the or each overhead structure is a rod, tube or other elongate member of metal or metal alloy, or of glass, ceramic or other electrically insulating material.
7. An overhead electric traction system as claimed in Claim 3 or 4, wherein each substantially flexible tension element of the or each overhead structure is a plurality of wires of high tensile steel or other metal or metal alloy stranded together or a plurality of filaments of glass fibre or other inorganic material stranded together.
8. An overhead electric traction system as claimed in any one of the preceding Claims, wherein the substantially vertically disposed elements of the beam of the or each overhead structure are so attached to the transversely extending flexible elongate elements that substantial movement of a vertically disposed element along a flexible elongate element is prevented.
9. An overhead electric traction system as claimed in any one of Claims 2 and 4to 6, wherein each substantially rigid compression or tension member of the beam of the or each overhead structure has spaced from both its ends, holes through which the flexible elongate elements pass.
10. An overhead electric traction system as claimed in Claim 9, wherein the compression or tension members of the beam of the or each overhead structure are clamped to the flexible elongate elements by wedges driven into the holes.
11. An overhead electric traction system as claimed in Claim 9, wherein the compression or tension members of the beam of the or each overhead structure are clamped to the flexible elongate elements by U-bolts or J-bolts.
12. An overhead electric traction system as claimed in any one of Claims 2,4 to 6 and 9 to 11, wherein, at the or each overhead structure, wire is suspended from the lowermost end of a vertically disposed substantially rigid compression or tension member of resin bonded glass fibre or other electric ally insulating material.
13. An overhead electric traction system as claimed in any one of Claims 2, to 6 and 9 to 12, wherein, at the or each overhead structure, a catenary wire or each of two or more catenary wires is supported on the uppermost end of a vertically disposed substantially rigid compression or tension member of resin bonded glass fibre or other electrically insulating material.
14. An overhead electric traction system as claimed in Claim 12 or 13, wherein the or each compression or tension member by which a contact wire and/or catenary wire is or are supported protrudes downwardly below and/or upwardly above the transversely extending flexible elongate members to which it is attached.
15. An overhead electric traction system as claimed in any one of the preceding Claims, wherein each transversely extending flexible elongate element of the beam of the or each overhead structure is a plurality of wires of high tensile steel or other metal alloy stranded together.
16. An overhead electric traction system as claimed in any one of Claims 1 to 14, wherein each transversely extending flexible elongate element of the beam of the or each overhead structure is a plurality of filaments of glass fibre or other inorganic material stranded together.
17. An overhead electric traction system as claimed in any one of the preceding Claims, wherein each substantially rigid upstanding member is a pole, a column, a steel lattice-work structure or the side wall of a cutting.
18. An overhead electric traction system of the kind in which current is collected from an overhead contact wire by means of a collector carried on the roof of a vehicle and comprising a shoe or bar extending transversely of the contact wire, which collector, in its operative position, is pressed upwards into contact with the underside of the contact wire, substantially as hereinbefore described with reference to and as shown in Figure 1 of the accompanying drawing.
19. An overhead electric traction system of the kind in which current is collected from an overhead contact wire by means of a collector carried on the roof of a vehicle and comprising a shoe or bar extending transversely of the contact wire, which collector, in its operative position, is pressed upwards into contact with the underside of the contact wire, substantially as hereinbefore described with reference to and as shown in Figure 2 of the accompanying drawing.
20. An overhead electric traction system of the kind in which current is collected from an overhead contact wire by means of a collector carried on the roof of a vehicle and comprising a shoe or bar extending transversely of the contact wire, which collector, in its operative position, is pressed upwards into contact with the underside of the contact wire, substantially as hereinbefore described with reference to and as shown in Figure 3 of the accompanying drawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8102489A GB2068650B (en) | 1980-01-28 | 1981-01-27 | Overhead electric traction systems |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8002751 | 1980-01-28 | ||
| GB8102489A GB2068650B (en) | 1980-01-28 | 1981-01-27 | Overhead electric traction systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2068650A true GB2068650A (en) | 1981-08-12 |
| GB2068650B GB2068650B (en) | 1984-01-11 |
Family
ID=26274308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8102489A Expired GB2068650B (en) | 1980-01-28 | 1981-01-27 | Overhead electric traction systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2068650B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019748A (en) * | 2014-06-13 | 2014-09-03 | 中南大学 | Observation standard unstability compensating type catenary offset detecting device |
| CN114199203A (en) * | 2020-09-17 | 2022-03-18 | 成都唐源电气股份有限公司 | Imaging detection method and device suitable for rigid and flexible overhead line system of subway |
-
1981
- 1981-01-27 GB GB8102489A patent/GB2068650B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104019748A (en) * | 2014-06-13 | 2014-09-03 | 中南大学 | Observation standard unstability compensating type catenary offset detecting device |
| CN104019748B (en) * | 2014-06-13 | 2015-05-13 | 中南大学 | Observation standard unstability compensating type catenary offset detecting device |
| CN114199203A (en) * | 2020-09-17 | 2022-03-18 | 成都唐源电气股份有限公司 | Imaging detection method and device suitable for rigid and flexible overhead line system of subway |
| CN114199203B (en) * | 2020-09-17 | 2023-07-18 | 成都唐源电气股份有限公司 | Imaging detection method and device suitable for subway rigidity and flexible contact net |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2068650B (en) | 1984-01-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |