DE1066227B - - Google Patents

Description

GERMAN

It is well known that section insulators in electrical contact lines form so-called hard points that affect the run of the pantograph, especially at high speed. One has tries to keep the weight of the section separator as low as possible, but you get with the known ones Versions not for such low weights as is desirable with regard to good navigability is. It is also known to make fittings for overhead lines made of synthetic linear superpolymers manufacture, including section insulators, which greatly simplifies their construction and reduces the weight can be greatly reduced.

The invention shows a way of creating a high-voltage line insulator made of synthetic plastic that does not stress the contact line at all or only very slightly. According to the invention, such a section insulator ^{1 is given} a cross-sectional shape corresponding to the contact wire and, like a piece of contact wire, is only inserted into the train of the contact line at both ends with contact wire clamps or similar clamps. In order to keep the weight small and achieve good flexibility, its cross-sectional area is at most about five times the of the contact wire. When it is driven over by the pantograph, it behaves in a mechanical way very similar to the contact wire. It consists of a sufficiently wear-resistant and weather-resistant plastic with high tensile strength and sufficient insulation and tracking resistance. Among other things, z. B. under the name "Teflon" brought onto the market plastic, which has such a high tensile and wear resistance that the cross-section can match that of the contact wire, or z. B. fiberglass.

For the purposes of the invention, however, the section insulator can also have a metal core of high tensile strength and a plastic jacket, preferably pressed onto it, with a correspondingly high dielectric strength. In this case, of course, the tensile strength of the plastic to be used does not have to meet high requirements, but if necessary the higher the dielectric strength of the plastic, especially if the metal core including the plastic extrusion only has a contact wire profile in the case of a high-voltage contact line (e.g. 15 kV) target. For this purpose, among other things, metal cores made of chrome-nickel steel with a tensile strength of 150 to 200 km / mm ² and plastics, such as. B. polyethylene, polyamide or soft PVC or those with the same high dielectric strength and wear resistance.

As an embodiment of the invention, the drawing shows the arrangement of a section insulator in

for high voltage contact lines
made of synthetic plastic

Applicant:

ELIN Aktiengesellschaft

for electrical industry,

Vienna

Representative: Dipl.-Ing. C. elements, patent attorney,
Deggendorf, Krankenhausstr. 26th

Claimed priority:
Austria from March 24th and June 3rd, 1954

Ing.Othmar Herrmann, Vienna,
has been named as the inventor

a catenary for high-voltage operated electrical main railways, namely show

Fig. 1 and 2 a section insulator according to the invention in elevation and plan view, while

Fig. 3 and 4 two examples of the same or similar cross-sectional shape of the contact wire profile Show route separator.

1 means the ends of the two contact wire sections isolated from each other by the section insulator, 2 the section insulator according to the invention, which for example consists of a metal core 8 and a Plastic sheath 9 is made and at the ends according to those used for insertion into the contact line Terminals 3 as well as the contact wire ends themselves are bent in a U-shape. Between any two that belong together Clamps 3, clamps 4 are arranged that hold the weight of the shock over the hangers 5 transferred to the suspension cable 6. In the suspension cable itself, the normally used one is between the hangers 5 Intermediate cable insulation 7 installed.

The length of the section insulator 2 can depend on the level of the contact wire voltage to get voted. It can e.g. B. the distance between the hanger wires 5 at a contact wire voltage of 15 kV are 1000 mm.

The production of a U-shape at the ends of the section insulator is expediently carried out before the extrusion the metal core with the plastic, yes

909 630/10

there is also a manufacture of the
with and without metal core in endless
Consideration. · ■ ·· ^ -

• ξ * In further training 'of the invention can ■ for dert sWeet ^ tleMerllinl. Soul higher tensile strength desolate .will. << 1ϊς. ijj not made of metal, but made of tem ^ soii ^ rexraciY ^ -untd very tensile fabric

feast

consists «,. For this, alkali-free glass fiber is particularly suitable, which can easily be produced with tensile strength values between about 2800 tiW> 4UQ®Wgfiin * ', the DpiliWrMftgkeÄ''e't about 60% of this. amounts to "iflüß" - the "iflüß" applied to "dfe" Qasfaserseeje appropriately by means of an "extrusion process" —have the required abrasion resistance and weather resistance. However, its electrical resistance to impact is due to the fact that it is non-metallic; do not have any special requirements. - The cross-section of the "core" consisting of glass fibers can have any shape, e.g. JB .. simple circular shape. The plastic sheath can consist of polyamide or other suitable plastics.

The section insulator according to the invention can be used in all types of high-voltage contact lines. Of course, 'may' his insertion in the catenary ^aucrp: where also the äriderß done as shown DIE way 'intended use specially adapted terminal fittings are used ""kürin'en''. When using the same terminals as ste; .iür _; .the catenary itself are used, the invention also offers the advantage that storage is very simplified.

Claims (8)

Patent claims: 35 ΤΓ 'Section insulator for high-voltage contact lines, -made of synthetic plastic, thereby marked that he is one of the catenary ... has a speaking cross-sectional shape and like a Piece of contact wire only at both ends with contact wire clamps or similar clamps in the train of the catenary is inserted. 2.- Section insulator according to claim 1, characterized in that it consists of a high tensile strength possessing metal core and a plastic jacket preferably pressed onto it accordingly high wear resistance and dielectric strength. 3. Section insulator according to claim 1, characterized in that it has a core made of insulating material high ^! r has tensile strength and a jacket made of insulating material with high abrasion resistance and weather resistance. 4. Section insulator according to claim 3, characterized in that the tensile part made of glass fibers, in particular alkali-free glass fiber. 5. Section insulator according to claim 3 or 4, characterized in that the tensile part with is provided with a sheath made of polyamide or similar materials. 6. Section insulator according to one of the preceding claims, 'characterized in that the Ends of the wire or rod-shaped insulator as well as the contact wire ends bent in a U-shape si rid or become. 7. Section insulator according to one of the preceding claims, characterized in that it is on the two contact wire ends using three clamps each. Fixed, is. 8. Section separator for catenary contact lines according to claim 7, characterized in that a hanger attached to the support cable engages in each case on the middle of the three clamps. . . Considered publications:
German, Patent Specifications No. 558 160, 723 518, S29, 762 377, 816 861; Swiss Patent No. 248 615.. 1 sheet of drawings © ■ 909 630/10 9.