4 results about "Replacement method" patented technology

The invention provides an unmanned aerial vehicle battery replacement device and an unmanned aerial vehicle battery automatic replacement method, and relates to the technical field of unmanned aerialvehicle equipment. The device comprises a bracket, a battery delivery mechanism and a battery replacing mechanism; the battery delivery mechanism comprises a plurality of charging units which are usedfor charging batteries; the battery replacing mechanism is installed in the bracket, and batteries carried by the charging units can be delivered to a battery chamber of an unmanned aerial vehicle bythe battery replacing mechanism to replace a battery of the unmanned aerial vehicle. The invention aims at providing the unmanned aerial vehicle battery replacement device and the unmanned aerial vehicle battery automatic replacement method, replacing of the battery in the battery chamber of the unmanned aerial vehicle can be achieved and the battery can be charged to achieve continuity of battery replacement, reduce labor intensity and provide convenience for battery replacement of the unmanned aerial vehicle.

The invention relates to the field of crane maintenance methods, and particularly discloses a method for replacing an oil inlet pipe of a crane. According to the method, a detachable first fixed block, a detachable second fixed block, a detachable first rotating block and a detachable second rotating block are used, the first rotating block and the second rotating block can be matched with a powerunit so that a first joint body can be disassembled, a second joint body can also be assembled, and a damaged oil inlet pipe assembly in a crane system can be conveniently and quickly disassembled and assembled.

The invention belongs to the technical field of low-voltage insulated porcelain bottles and discloses a low-voltage insulated straight bottle capable of being replaced rapidly and a replacement method of the low-voltage insulated straight bottle. The low-voltage insulated straight bottle is mainly characterized by comprising a porcelain bottle body and a stand column located below the porcelain bottle body, wherein external threads are arranged on the lower half portion of the stand column; a screwing boss is fixed to the position above the external threads, and the screwing boss and the stand column are of an integrated structure; a fixing frame with an opening in the side face is arranged on the lower portion of the stand column; a locating hole with internal threads is formed in the upper portion of the fixing frame; the stand column is inserted into the locating hole. When an original straight bottle rusts or is damaged or falls off and an original stand column can not be removed due to rusting, the stand column is sawn off, a horizontal plate of a cross arm is sleeved with the fixing frame along the opening in the side face of the fixing frame, the stand column is inserted in the locating hole, the lower end of the stand column abuts against the horizontal plate of the cross arm, and a lower plate of the fixing frame presses the lower surface of the horizontal plate of the cross arm tightly under the action of the stand column after the stand column is tightened; in this way, when a threaded hole can not be formed in the cross arm, a hole does not need to be drilled in the cross arm additionally, and replacement is more convenient and faster.

The invention relates to the technical field of building decoration, in particular to a ground fine leveling technology. The ground fine leveling technology comprises the following steps that horizontal lines with the same height are popped up on the four walls, close to the ground, of a room; a first drawing pin is pressed on the horizontal line of one wall, and a fine line is bound on the firstdrawing pin; cement mortar is laid in a right-angle triangular region at one corner of the room firstly; the cement mortar is embedded into a plurality of tile strips before the cement mortar is solidified, a smooth glaze surface of each tile strip faces upwards and is not stained, and the tile strips as much as possible are located on the same straight line; and before the cement mortar is solidified, one end of the fine line is pulled to move along the horizontal lines of the three walls without fixing the first drawing pin, meanwhile, the positions of the tile strips are manually adjusted so that the fine line can completely scratch the smooth glaze surfaces of all tile strips and then waiting for the solidification of the cement mortar. According to the ground fine leveling technology,the step of cake plastering is canceled, a replacement method which is simpler and easier to operate and high in efficiency is adopted, so that the construction time of ground fine leveling is greatly reduced.