RU77114U1 - TENSION CLAMP - Google Patents

Abstract

The utility model relates to mounting tension clamps and can be used to capture and tension wires and lightning protection cables of overhead power lines.

The proposed tension clamp for tensioning and adjusting the wires of overhead power lines, including a pair of power rods symmetrically rotationally bolted on one side to an arm, another pair of holes, power rods rotationally mounted on the clamps, clamps on a curved section having a cut notch, are also symmetrically mounted rotationally bolts to the earring, on the reverse side, all bolted connections are tacked by welding for strength, in addition, the adjusting screws are screwed from the reverse side t for laying wires along the longitudinal axis of the notch and aligning the wires of various diameters.

Description

The utility model relates to mounting tension clamps and can be used to capture and tension wires and lightning protection cables of overhead power lines.

Known designs of tension pressed clamps for gripping and tensioning the wires of overhead lines. (Technology for the construction of power lines: Textbook for technical schools. M.A. Reuta.- M .: Energoatomizdat, 1983, p. 193, Fig. 4.21 p. 194. These clamps provide a reliable grip of the wires when they are tensioned and used, but for them Installation requires special equipment (hydraulic press) and special tools (dies).

Known tension wedge clamp type "wedge-thimble" (ibid., Fig.4.19, p.193, p.1), allowing the capture of steel-aluminum wires. The clamp provides reliable fastening of the wires, but does not allow the capture of a long wire, since it is required to thread the wire through an integral housing.

Known clamps for connecting wires of a chain suspension of a contact chain (SU. Copyright certificate No. 1381015, B60M 1/24, 09/04/1986) are widely used on electrified railways of Russia and designed to connect wires of different sections and purposes. The disadvantages of such clamps are the lack of roughness on the cylindrical surface of the gutters of the jaws for placement in the clamp of carrying and shunting stranded wires, the absence of a notch on the surfaces of the profile of the jaws mating with the grooves of the contact wire. Therefore, this clamp does not provide, on the one hand, reliable electrical contact with the connected wires, and, on the other hand, does not provide reliable fastening of the clamps on the wires without slipping. Also, a large mass of clamps causes the appearance of hard points in the contact suspension.

Known tension clamp for wires or supporting cables, consisting of a clip with a longitudinal slot for inserting the wire and with wedges laid between the walls of the clip and the wire and used to clamp the wire by self-jamming it at maximum tension. (DE 3108641 A1. 09/30/1982) At the same time, to additionally tighten the wedges when pulling the pull cable, the ears of the cage are equipped with two-arm cams pivotally mounted in them, with one shoulder acting on the wedges, and on the other having holes for securing the ends of the pull cable.

In this design of the tension clamp, reliable self-jamming of the wedges is not achieved, therefore it is necessary to tighten the wedges with the help of additional insurance

additional elements, namely articulated two-arm cams, which greatly complicates the design of the clamp. In addition to all this, this clamp is mainly intended for tensioning the cables of contact lines and its use for overhead power lines is quite problematic due to the more significant loads acting on them.

The applicant set himself the task of creating a tension clamp, which allows to reduce the complexity of mounting the tension clamp and increase the reliability of securing the wire in it, which would provide a standard target strength of the wire termination in the clamp.

The solution to this problem is achieved due to the fact that the clamp has a bracket of 1 cm. FIG. 1 on which a pair of power rods 2 are symmetrically rotationally bolted, another pair of holes of the rods 2 are rotationally mounted on the clamps 3 with bolts. Clips 3 are also symmetrically rotationally attached to the earring 4 bolts. On the clamps 3, on a curved working section, a notch 5 is cut 1 mm deep with a radius of 24 mm for reliable clamping of wires. On the reverse side, all bolted joints are welded. The adjusting screw 6 is screwed on the back of the device and serves to align the wires of various diameters.

The clamp works as follows: when bringing the bracket 1 and the earring 4 cm. FIG. 2, the clamps 3 diverge through the power rods 2. The wire 7 is inserted into the working section, the wire is laid along the longitudinal axis of the notch 5 with the adjusting screw 6 and, when the tension force is applied to the bracket 1 clamps 3 converge, clamping the wire.

This device works especially well at a height (support) when repairing overhead power lines. A manual winch is attached to the bracket 1 and tension is applied for the further production of the required work.

Claims (1)

A tension clamp for tensioning and adjusting the wires of overhead power lines, comprising a housing, characterized in that it has a pair of power rods symmetrically rotationally bolted on one side to the bracket, other thrust holes rotationally mounted on the clamps, clamps on a curved section having a cut notch are also rotationally bolted to the earring symmetrically, on the reverse side all bolted joints are welded, in addition, an adjustment screw is screwed on the reverse side for laying the wires along the longitudinal axis of the notch and aligning the wires of various diameters.