Wire paying-off lifting tool of power system

Abstract

The invention discloses a lifting tool for unwinding wires in an electric power system, which comprises a base, a lower locking device which is arranged on the bottom of the base to lock and cooperate with the pole cross-arm, a bracket is fixed on the base, and the bracket is hinged to a support tube through a bracket shaft , the bracket is provided with a lower positioning device for positioning and matching the support cylinder, the upper end of the support cylinder is installed with an upper gear that rotates close to the outer surface of the main support plate through a rotating connection device, and the support cylinder is equipped with a gear that is snapped and positioned with the teeth of the upper gear In the upper positioning device, an upper bracket is hinged on the upper part of the upper gear, and an upper locking device is arranged between the auxiliary support plate and the upper bracket. The advantages are convenient installation, reliable fixation, simple disassembly, free adjustment of the pay-off height according to the actual height of the pole insulator, automatic determination of the length of the pay-off cable, and only one installation and disassembly for one set-up. Yes, the tightness of the wires before and after the tightening is consistent to ensure the quality, and one person can operate it.

Description

technical field [0001] The invention relates to a lifting tool for wires in a power system. Background technique [0002] The pay-off block is a tool that must be used in the construction of power lines. The main structure is composed of aluminum or nylon pulleys, frame fixing devices, hooks or U-shaped groove stabilizing devices. Using the pulley during the line erection and tensioning process can reduce the wire Excellent frictional resistance, prevent wire strand damage and insulation layer damage, and can increase construction speed and reduce power outage time. [0003] Now in the construction of 10kV and below power lines, the distance between the U-shaped groove stabilizer and the top of the pulley is about 140mm for the pay-off tackle used, while the height of the P-15 rod insulator is about 240mm, and the height of the P-20 rod insulator is about 140mm. The height of the insulator is about 350mm, the pulley is short, the insulator is high, and the gap is large. Th...

AI Technical Summary

Problems solved by technology

Therefore, after the wire tightening work is over, the staff has to use their shoulders to lift the wires out of the trolley, lift them up to the height of the insulator, and put them into the groove on the top of the insulator for binding. This requires a lot of physical strength and seriously affects the work. schedule

[0004] In the construction, the conductors with small diameters are relatively light, and the staff can complete the lifting and binding of the conductors without much effort. For the phase line, since the pay-off block must also be fixed on the lower cross arm, the distance from the insulator on the top of the pole is about 1100mm. The height distance is very large, and sometimes even two people are required to complete it, which will easily lead to slow construction progress and delay in power transmission time. status

The second disadvantage is that in order to reduce the difficulty of lifting the neutral phase line, the pay-off block is usually removed from the lower cross arm, and then fixed to the top cap of the neutral phase line for use. The problem caused by this is that it needs a second It is very inconvenient to disassemble and install the wire block

The third disadvantage is that after the wire is lifted to a higher insulator, the tension of the wire will exceed the pre-set tightness, resulting in an offset error between the tension of the wire after actual construction and the specified tension, which greatly reduces It will seriously affect the safety of line transmission; the fourth disadvantage is that when it is necessary to determine the length of the cable between the two poles, it is obtained by calculating the distance printed at both ends of the cable, so that two people are needed It is very inconvenient to carry out wireless communication on the pole

[0005] For applications where the height of the insulator is lower than that of the pay-off block, when moving the wire from the pay-off block to the top of the insulator, you only need to lift the wire up a little, and then gently lower the wire to the top of the insulator, which saves effort and is It can be operated by one person, but a new situation will appear in this way, that is, the lowering of the wires is carried out after the work of tightening the wires is completed, so the lowering of the wires will cause the tensioned wires to loosen again, which does not meet the requirements of the high-altitude wiring regulations and needs to be re-installed. The phenomenon of tight wire and rework obviously greatly reduces the efficiency of wire stringing

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