SU76825A1 - Device for automatic tensioning of the power cable - Google Patents

Description

The subject matter of the invention relates to devices for automatically tensioning a current-carrying cable on an electric locomotive, an electric tractor, etc., a bar for winding the cable and with a load (or weights) for tensioning the spare cable loop formed on the electric locomotive. Said drum is driven by an electric motor that is automatically turned on and off depending on the amount of cable released.

According to the invention, cable

the drum is equipped with a crane stopper to prevent coiling

cable Dog specified stopper

mechanically connected with stops,

located on the way of moving cargo so that at the limiting

v reducing the length of the spare loop

 the drum is automatically released from the stopper and the load is wound

with him part of the cable.

FIG. 1 and 2 show diagrams of the device proposed in two versions. In the first embodiment (Fig. 1), along the three vertical uprights 1 forming the mast body, slides up and down, as along the guides, the tension load Q illuminated on the cable

through block 2. The cable from the current collecting frame passes through the receiving unit 5, the mast housing unit 4 and the drum 6 guiding unit 5. The boom 7 with the pickup rollers 8 rotates the receiving unit 3 always in the cable direction. The Kronschtein receiving unit with sleeve 9 freely rotates around a vertical tubular axis 10. By extending the current collecting mast manually produced by the handle 12 mounted on the axis //, the height of the mast is set, ensuring the best conditions for the current collecting frame to move along the contact wires.

Drum 6 when 1 auxiliary included. The motor 13 is rotated by winding a cable. When the motor is turned off, the drum is protected by the ratchet 14 and the ratchet pawl 15 from rotating in the opposite direction and unwinding the cable. With increasing cable tension (for example, when the electric tractor retracts from the contact line), the load Q rises and presses loop 16 onto the support 17 tons of g. 18. At the same time, the ratchet dog squeezes and releases the drum from which it starts

cable As a result of lengthening the cable, the load Q lowers and presses the pull 18, as a result of which the dog, under the action of the spring 19, is pressed against the ratchet again, securing the drum.

When the cable is loosened (for example, when the electric tractor approaches the contact line), the load Q lowers, presses the contact plate 20, retracts the contact springs into the sockets of the contact block 21. At the same time, the motor circuit closes and winds up cable. The load Q, having risen to a certain height, abuts against the stops 22 vertical m r 23, freely passing through the holes in the load Q to the contact plate 20, and raises the plate upwards, turning off the electric motor. In this way, constant tension of the cable determined by the weight of the load Q is automatically maintained.

To adjust the fixture to the required current collection angle, the weight of the load Q is respectively changed by adding or removing cargo washers.

In the second variant (Fig. 2), the vertical posts / slide weights slide. The contact wires, coiling off the drum 24, pass through the basic blocks 25 and 26, the guide blocks 27, the receiving blocks 25 and through the rollers 25 of the boom 5 (3 departures from the tension trolley through intermediate supports to the trolley's current collector. on the wire in blocks, they create the necessary tension on the wires of the line.The tension of the wires with a constant tension load Q is determined by the sag of the load bearing point H, not shown in the diagram, relative to the base blocks 25 and 26.

When loosening the tension of the wires of the line, for example, when the tension carriage is pulled toward the collector, the load Q lowers, presses the head of the rods 32, lowers the contact. the plate 33, the spring contacts of which, the entrance to the sockets of the terminal block 34, gates the circuit of the electric motor 35. The electric motor causes the drum 24 to rotate, winding a wire on it. At the moment when the upper edge of the lifting weight Q, being pushed onto the plates 31, lifts the contact plate 33, the motor circuit is opened.

When the tension of the wires increases, for example, when the tension carriage is pulled away from the current collection, the load Q, lifting, presses the end of the lever 39, frees the drum ratchet 36, allowing the wire to unwind. When lowering the load Q, the lever 39 is again pressed by the spring 37 to the ratchet 36, secured the drum 24.

Adjusting the required amount of wire tension is done by raising or lowering screws 38 of terminal block 34. For this purpose, scales can be set, calibrated directly in kilograms of wire tension.

The fixture can be made to separate each wire separately, as shown in FIG. 2, or with a general regulation of all three wires, a common load.,

Due to the three-sided arrangement of the receiving booms 30, the fixed distance between the wires is maintained during rotation of the tension trolley DG 225 in one direction and up to 135 ° in the other direction relative to the direction of the contact line, which ensures the necessary maneuverability of the tension trolley during guidance and remove contact line.

The suspension height of the contact wires moving away from the trolley is mounted on the corresponding extension of the upper frame 41 by means of a shaft with a handle 42 fixed in the appropriate position by means of a ratchet pawl with a counterweight 43.

For insulating the wires from each other and from the housing, the surfaces of the rollers and the coils in contact with the wires are protected by insulating, gaskets, and the wires between 7.1i are protected by rubber tubes 40.

Subject invention

A device for automatically tensioning a current lead on an electric locomotive, an electric tractor, etc., with a reel, m for winding a cable, a 1Вра1 electromotor, switched on and off automatically depending on the number of cable released, and a tension formed on the locomotive

A spare cable loop, characterized in that the cable drum is provided with a ratchet stop that reel the cable, the dog is mechanically connected to the stops located on the load path so that when the length of the spare loop is reduced, the drum loop is automatically released from the stop and the load winds part of it cable

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FIG. 2

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