3results about How to "Shrink freely" patented technology

The utility model provides an electric vehicle charging pile with good protection performance, and relates to the technical field of electric vehicle charging piles, the electric vehicle charging pile comprises a charging pile body, one side of the charging pile body is provided with a window, the window is internally provided with a linkage assembly, the linkage assembly is provided with a support plate, the top of the support plate is provided with a mounting seat, and the mounting seat is provided with a mounting hole. A charging gun is arranged on one side of the mounting base, and a control panel is arranged at the bottom of the window. The device solves the problems that a charging gun in an existing charging pile is directly exposed outside and can be aged, the charging gun is easily taken down by children to be damaged, and the service life of the charging pile is affected.

The application discloses a preparation method of high-mechanical-property medium-manganese steel and application thereof and belongs to the technical field of medium-manganese steel processing. The method is based on conventional hot rolling, cold rolling and annealing treatment, and utilizes secondary circulating quenching heat treatment technology after cold rolling, and the temperature is first increased to 900-910 DEG C and kept for 30-35 min, then the temperature is increased to 900-910 DEG C and kept for 10-12 min after water quenching, and then the temperature is increased to 670-690 DEG C and kept for 1-1.5 h for annealing, and then air cooling is carried out to the ambient temperature, so that the content and stability of residual austenite in the medium-manganese steel are further improved, the mechanical properties of the medium-manganese steel product are remarkably improved, the tensile strength is 838 MPa, the total elongation is 90.8%, and the product of the strength and the elongation is 76.1 GPa%. The method can be widely applied to technical fields requiring the use of high-mechanical-property medium-manganese steel.

The invention discloses a ring main unit convenient to expand, which comprises an expanded ring main unit, an upper cabinet body and an expanded bottom cabinet are arranged on the expanded ring main unit, the expanded bottom cabinet is arranged at the bottom of the upper cabinet body, a box door is arranged on the front surface of the upper cabinet body, an electric energy meter and a display are arranged on the box door, and an expanded bottom cabinet mounting groove is formed in the lower half part of the cabinet body of the box door. A lifting driving mechanism is arranged at each corner of the top of the inner side of the extension bottom cabinet mounting groove, a micro motor is arranged in the center of a motor fixing block on the lifting driving mechanism, a rotating shaft of the micro motor is arranged downwards, a threaded rod is arranged below the rotating shaft of the micro motor in a matched mode, and a base is arranged at the bottom of the extension bottom cabinet upper cabinet body in a matched mode; the expansion type ring main unit is simple in structure, the cabinet body can be expanded according to actual needs, meanwhile, space utilization in the cabinet body of the expansion type ring main unit can be expanded according to actual installation requirements, the expansion type ring main unit adopts electric expansion, and the expansion mode is simple and convenient.