2results about How to "Realize multi-level adjustment" patented technology

The utility model relates to a folding fixing device of orchid cultivation frame, including fixed plate, fixed plate is provided with two, still including two support bars of setting in the lower extreme of fixed plate, the lower extreme mounting of support bar has universal wheel, the lower extreme of two fixed plates is provided with width adjusting assembly, the upper end of fixed plate is provided with height adjusting assembly, installs locking assembly on height adjusting assembly, width adjusting assembly is used for adjusting the overall width of cultivation frame, height adjusting assembly is used for adjusting the overall height of cultivation frame, locking assembly is used for locking the height of current cultivation frame, the novel adoption three -level nested sliding structure, cooperation positioning hole and locking mechanism, realize height multistage adjustment, and through the thread transmission cooperation knob control width adjustment of screw and screw cylinder, satisfy different orchid varieties in different growth period's space demand.

The present invention discloses a device for preparing overcurrent-induced short-circuit traces, and relates to the technical field of electrical fire fault simulation and electrical fault trace preparation. It includes an experimental circuit module, a data measurement and recording module, and a load circuit. The experimental circuit module is used to provide an alternating current to at least the experimental wire to simulate an overcurrent fault; the experimental wire is used to simulate the circuit in the process of a real overcurrent fault; the experimental wire will generate heat when an overcurrent fault occurs, and the heat will melt the insulation layer and the sheath wire of the experimental wire to cause a short circuit fault and form a short circuit trace; the data measurement and recording module is used to measure and store the voltage data and current data at the moment when the overcurrent fault of the experimental wire occurs; the load circuit is used to perform multi-stage adjustment on the size of the alternating current flowing through the experimental circuit module. The present invention realizes the multi-stage adjustment of the overcurrent in the experimental wire, and the preparation and recording of the short circuit trace induced by the overcurrent fault of the experimental wire under alternating current.