RU143914U1 - JOINT CLIP FOR CONTACT WIRES - Google Patents

Abstract

1. A butt clamp for contact wires, containing two dies with teeth and notches made in the lower part on the inner surface of the dies, and bolt connections, characterized in that in the dies of the clamp on the inner surface between the bolt joints there are protruding stops having a height of 1 8 mm-2.0 mm. 2. The clamp according to claim 1, characterized in that the teeth and notches in the clamp dies are cut to a depth of 2 mm. 3. The clamp according to claim 1, characterized in that the height of the protrusion-stop in the upper part in the dies is in the range from 1.9 mm to 2.3 mm.

Description

The utility model 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 bolted connections. The protrusions, notches, are located from the middle of the die with peaks facing each other from the place of docking of the contact wire with the emphasis against the direction of the tensile load. (Catalog of fittings for the contact network of electrified railways, approved for use by the Department of Electrification and Power Supply of JSC Russian Railways 2011, p. 137.)

The clamp should be mounted at the joints of the contact wires in accordance with regulatory documents using torque wrenches with a bolt tightening force of 60 Nm.

However, in a number of cases, the installation of the clamps is carried out without the use of torque wrenches, as a rule, with a significantly greater force 2-2.5 times higher than the established standard, which over time under operating conditions leads to the formation of longitudinal cracks in the clamp dies with their subsequent destruction, slipping of contact wires from butt clamps and interruption of train traffic.

To eliminate this phenomenon, it is possible to increase the cross-section of the dies and their weight, but this is not practical, since the current collection of the electric rolling stock is deteriorating, sparking appears between the current collector skid and the contact wire in the clamp installation area, and the contact wire is worn out, which reduces its life service.

The technical results are to increase the reliability of the clamp in service due to the creation of the design of the clamping dies 3 protrusion lugs, the middle of which eliminates the possibility of deformation of the dies with any excess clamping bolt fastening forces, the upper emphasis-protrusion allows you to obtain standard operating conditions of the contact junction wires provided by OST 32.204-2002, and additional notching of the teeth of the notch increases the force of slipping of wires from the butt clamp to excess hydrochloric value amounting to 500-700 kg.

The technical result is achieved by the fact that the butt clamp for contact wires contains two dies with teeth and notches made in the lower part on the inner surface of the dies, and bolt connections, while in the dies of the clamp on the inner surface between the bolt joints there are protruding stops having a height 1.8 mm - 2.0 mm.

The teeth and notches in the clamping dies are cut to a depth of 1.8 mm - 2 mm.

The height of the protrusion-stop in the upper part in the dies is in the range from 1.9 mm to 2.3 mm.

In FIG. 1 shows a butt clamp.

In FIG. 2 - a clip die with ledges.

In the proposed design of the butt clamp for contact wires of the die 1 of the clamp on the inner surface have protrusions-stops 2 of the middle part located in the zones between the fastening bolt joints. Stops 4 of the upper part of the dies clamp. When excessively tightening the bolt-on fasteners in the clamp, the tabs-stops 2 of one die abut the same in the other, as a result of which, deformation in the die 1 of the clamp does not occur during further tightening by the bolt connections. The fulfillment of this condition will further exclude the reasons for the destruction of the dies of the butt clamps. The height of the protrusions-stops in the dies of the butt clamps is 1.8-2 mm. The teeth and notches 3 in the clamping dies are cut to a depth of 1.8-2 mm. The height of the protrusion-stop in the upper part in the dies is in the range from 1.9 mm to 2.3 mm. The clip is equipped with an earring 5.

The technical result is achieved only within the above ranges, which is confirmed by the experts.

In addition, a further increase in the reliability of the clamp can be achieved by cutting the teeth of the notch 3 located in the lower part of the dies of the butt clamp.

The specified operation is carried out by a special tool, while the depth can be 1.8-2.0 mm. Due to this operation, the load-bearing capacity of the clamp in operating conditions increases by 500-700 kgf, while the breaking force at the junction of the contact wires increases above 4000 kgf, which is significantly higher than the required standard for OST 32.204-2002.

Claims (3)

1. A butt clamp for contact wires, containing two dies with teeth and notches made in the lower part on the inner surface of the dies, and bolt connections, characterized in that in the dies of the clamp on the inner surface between the bolt joints there are protruding stops having a height of 1 , 8 mm-2.0 mm. 2. The clamp according to claim 1, characterized in that the teeth and notches in the clamp dies are cut to a depth of 2 mm. 3. The clamp according to claim 1, characterized in that the height of the protrusion-stop in the upper part in the dies is in the range from 1.9 mm to 2.3 mm.