RU2165858C1 - Contact wire splicing fitting - Google Patents

Abstract

FIELD: electrified railways; contact wire splicing. SUBSTANCE: splicing fitting for contact wires has two blocks with teeth and cuts, and bolt joints. Projections of cuts are made from middle of block, with their tops pointed to each other from place of butt joining of contact wire with provision of stop opposite to direction of tensile load. Hardness of block is equal to 1.55-2.2 of contact wire hardness. Pitch and height of projections of cuts are 1.5-2 mm. Cuts are made for penetration into wire surface layer of 0.6-1 mm. EFFECT: improved reliability of splicing fitting. 3 cl, 4 dwg

Description

 The invention relates to electrified railway transport and can be used when connecting contact wires.

 Known butt clamp for contact wires, containing two dies with teeth and notches on them and bolt connections holding the dies (Armature of the contact network of railways, Catalog, Moscow, Transport, 1995, p. 38).

 The disadvantages of the known clamp is the low reliability and mechanical strength of the dies of the clamp, which leads to slipping of the wire from the clamp and the malfunction of the train schedule.

 The technical result of the invention is to increase the hardness of the dies in comparison with the hardness of the wires by 1.55 times due to the manufacture by hot stamping, selection of bronze and the technological mode of its stamping, increasing the reliability of the joint due to the cutting of the protrusions of the notch by 1 - 0.6 mm body wire.

 The technical result is achieved by the fact that the butt clamp for contact wires contains two dies with teeth and notches on them and bolt connections fastening the dies, notches protruding from the middle of the die with its vertices facing each other from the junction of the contact wire, and the surface of the protrusions is perpendicular to application of the load from the tension of the wire, and the hardness of the die is 1.55-2.2 hardness of the contact wire. The protrusions have a pitch and height not exceeding 1.5-2 mm. The protrusions of the notch enter the body of the contact wire at a distance of 0.6 - 1 mm. The dies are made by hot stamping with selection of bronze and the technological mode of its stamping.

In FIG. 1 shows a clip;
in FIG. 2 is a view B of FIG. 1 clamp;
in FIG. 3 - one die clamp;
in FIG. 4 is a view A of FIG. 3.

 The clamp contains two dies 1 and 2, fastened with connecting bolts 3. Both dies have a tooth 4 in the lower part with a notch 5 along the entire length of the dies included in the groove of the contact wire 6. In the upper part of the die there are protrusions 8, which are an abutment when fixed with bolts 3 clamp dies. A slot 9 is made on the dies to accommodate a supporting bracket 10 in it.

 When fixing at the junction 7 of the contact wires 6 of the clamp and tightening the fastening bolts 3 located horizontally, the protrusions of the notch 5 cut into the body of the contact wire at a distance of 0.6 - 1 mm and keep it from slipping out of the clamp in the joint area. If the protrusions of the notch are inserted to a distance of less than 0.6 mm, the wire may slip, and when the protrusions of the notch are inserted more than 1 mm, the wire may be damaged. The joint strength should be 2.5 times higher than the permissible load of the tension of the contact wires in operation. The protrusions of the notch 5 are made in a special configuration with an emphasis against the direction of the tensile load from the middle part of the clamp along the vertical axis. The protrusions of the notch are made from the middle of the plate towards each other from the place of docking of the contact wire. The surface of the protrusions of the notch is made perpendicular to the application of the load from the tension of the wire. The protrusions have a pitch b and a height h of dimensions 1.5-2 mm, since if these values are more than 2 mm, damage to the wire is possible, and if less than 1.5 mm, the wire will slip from the clamp.

 If the contact wire (copper) is famous, the bronze material and the clamp manufacturing method (hot stamping) are selected so that the die hardness is 1.55-2.2 wire hardness, under this condition, the clamp die and wire are reliably engaged with the penetration of the notch into the surface wire layer to a depth of 0.6-1 mm.

 The proposed clamp can be used when connecting contact wires of all grades that are used in the contact network of electrified railways, networks of urban transport, tram, trolley.

Claims (3)

 1. A joint clamp for contact wires, containing two dies with teeth and notches on them and bolt connections, characterized in that the protrusions of the notch are made from the middle of the die with vertices facing each other from the junction of the contact wire with a stop against the direction of the tensile load, and hardness dies is 1.55 - 2.2 hardness contact wire.  2. The clamp according to claim 1, characterized in that the protrusions of the notch have a pitch and a height of 1.5 - 2 mm  3. Clamps 1 and 2, characterized in that the protrusions of the notch are made with the possibility of penetration into the surface layer of the wire by 0.6 - 1 mm.

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