2results about How to "Constant volume" patented technology

The utility model relates to concrete construction quality detection equipment technical field, concretely is a kind of concrete slump test device integrating tamping, measuring function in one, a kind of concrete slump test device, including the conical frustum cylinder of vertical arrangement, its upper end is feed inlet, lower end is discharge port, the inclined tread for treading down pressure is symmetrically arranged in the lower part of the cylinder outside, so that the cylinder is attached to ground surface, handle is symmetrically arranged in the upper part of the cylinder outside, for lifting cylinder, the cover plate covering the top of cylinder, its diameter matches with the top opening of cylinder, the rammer vertically arranged in the upper part of cover plate, can be extended into the inside of cylinder, the ruler rod is sleeved in the inside of rammer, both are screw thread connection, ruler rod surface is equipped with axial scale line, end has horizontal bottom edge, axial flat surface is arranged on the outside of rammer, for forming surface contact with cylinder feed inlet, strip level bubble is arranged on the upper part of ruler rod, for indicating the vertical state of ruler rod.

The utility model relates to a special cylinder for a flat short-stroke push plate, and belongs to the technical field of injection molding hot runners. Comprising a cylinder body, a top cover used for sealing and covering is arranged at the top of the cylinder body, a closed cavity is formed in the cylinder body, a reciprocating piston is arranged in the cavity, the bottom end of the piston extends downwards from the interior of the cylinder body, a fixedly-connected piston rod is arranged at the bottom of the piston, the cylinder body and the cavity are of a flat structure, and an annular edge protruding outwards is arranged at the top of the piston. The bottom of the plug rod is provided with a fixedly-connected push plate, and the bottom of the push plate is provided with a plurality of fixedly-connected needle valves. According to the scheme, the piston and the inner cavity are arranged to be of a flat structure, the longitudinal height of the cavity is reduced, the horizontal width of the cavity is increased, the longitudinal height is reduced, so that the stroke of the piston is shortened, when air enters the cavity, the piston moves slowly, control over the push plate and the needle valve is finer and more stable, and the precision of injection products is improved.