Technical field
[000 1] The invention relates to the improvement of a drain bolt loading and unloading tool, in particular to a flexible fastening manipulator for a drain bolt of a power transmission line, which can realize the simultaneous forward and reverse rotation of a screw and a nut, and is convenient to install, fasten or disassemble.
technical background
[0002] The drainage plate is a component connected by a drainage wire, a suspension string and a parallel slot clamp in the transmission line. The drainage plate is composed of two rectangular aluminum plates stacked together, and then screwed and fixed by nuts through the corresponding through holes on the two plates. The screw is sleeved with a circular gasket and an elastic gasket, and sometimes there are two nuts at the upper end of the screw, which is more difficult to loosen. After running for a period of time, the contact resistance between the drain plate and the parallel groove clamp often increases due to factors such as loosening of screws and nuts and oxidation of contact surfaces. When the current load is relatively large, the temperature in the contact surface of the parallel groove clamp will rise, and then redness and metal melting will occur. In severe cases, the jumper may be burned and an accident may occur. Once the above situation occurs, the maintenance personnel need to bring tools immediately and tighten the screws and nuts in the live state to ensure the safe operation of the line.
[0003] At present, most of the tools used in live working are insulating wrenches and insulating sleeves, and two insulating wrenches or insulating sleeves are needed for each operation. One clamping screw base prevents the screw from rotating, and the other clamping nut clockwise tightens the nut relative to the screw. However, this tool needs to switch the position of the clamping nut intermittently and continuously and pull it back and forth, which is slow in fastening speed, labor intensity and low in efficiency. If two sets of bolts are arranged side by side on the same drainage board, when one set of bolts is fastened with an insulating wrench or an insulating sleeve, the other set of bolts will also hinder the rotation of the handle and affect the operation.
[0004] According to the retrieval, in order to improve the shortcomings of the prior art, there are many reports about bolt fastening tools for drain plates. For example, China patent CN 104242 149A discloses a "tension tower drainage plate bolt fastener", which consists of an insulating rod, a rotating shaft and a socket wrench, and the socket wrench is butted and rotated by nuts; CN2030 19274U discloses a "wrench for fastening screws of connecting plates of tension towers", which comprises a sleeve rod, a pull rod, a wrench and a rotating shaft, wherein a ratchet wheel is added to the rotating shaft, and a rack is arranged at the upper end of the pull rod, so that the wrench can continuously and unidirectionally rotate through the ratchet wheel. However, this improvement still needs intermittent and continuous reciprocating pulling, which does not obviously improve the fastening speed and reduce the labor intensity; At the same time, because the insulating operating lever is added, the operating distance is prolonged and the safety performance is improved, but it also increases the difficulty of quickly centering the sleeve and nut, which makes the eyes feel tired. It is also reported that the hexagonal screw barrel is driven by a motor. Although the fastening speed is improved, the problem that the screw cannot be fixed is not solved. At the same time, it is also equipped with other accessories, which is inconvenient to operate. At present, there is no report that a special tool can realize the simultaneous positive and negative rotation of both ends of the drain plate screw and fast fastening.