4results about How to "Control impact" patented technology

This utility model discloses a dart impact testing machine for measuring material properties, comprising: a base with a mounting groove on its surface, a negative pressure chassis slidably inserted into the inner wall of the mounting groove, a mounting unit for limiting the position of the negative pressure chassis on the inner wall of the mounting groove, a negative pressure groove on the top of the negative pressure chassis, a pressure plate above the negative pressure chassis, a negative pressure unit, and a first driving unit, wherein the negative pressure unit applies negative pressure to the inside of the negative pressure groove. In this utility model, by creating a lifting groove on the surface of the base, and with a lifting block slidably inserted into the inner wall of the lifting groove, during use, the user rotates a threaded rod, which drives the lifting block, threaded onto the surface of the threaded rod, to slide along the inner wall of the lifting groove, thereby controlling the height of the impact dart and thus controlling the impact force.

This invention discloses a prefabricated V-shaped rigid frame bridge and its construction method. The prefabricated V-shaped rigid frame bridge includes: pier foundations, at least two V-legs, and a main girder. The V-legs are composed of multiple prefabricated segments stacked together, with the bottom fixed to the pier foundation via a post-cast section and the top having a cast-in-place section. The main girder includes a No. 0 segment beam and multiple symmetrically arranged prefabricated segments. The prefabricated segments of the main girder are constructed using the inverted beam method, i.e., the top slab, then the web, and finally the bottom slab are prefabricated in sequence. The cast-in-place section of the No. 0 segment beam is integrally cast with the top cast-in-place section of the V-legs. This invention achieves rapid and standardized prefabrication and assembly of variable cross-section beams and V-legs through prefabrication and inverted beam method templates, shortening the construction cycle, reducing the risks of high-altitude operations and traffic interference, improving quality and durability, and possessing economic and environmental advantages.

The utility model relates to nitrogen spring technical field especially is two -segment type pressure nitrogen spring, including casing, piston rod, piston and first sealing ring, the casing is equipped with inner chamber and via hole, the via hole is equipped with the piston sleeve, and piston rod slidingly penetrates the piston sleeve, and the piston lifting is located in the inner chamber, and the piston is sealedly slidably connected with the inner side wall of inner chamber through first sealing ring, and the piston is equipped with flow control valve, upward overflow valve and downward overflow valve, and the bottom of casing is embedded with the inflation valve, and the inner top wall of inner chamber is equipped with the buffer pad. The present application has two -segment type elasticity change, namely from high elasticity gradually increases stage to low elasticity gradually increases stage, to satisfy the demand of linear change of different elasticity required by different displacement stroke, especially applicable to the deep drawing forming process of stamping die, and when the piston rod is reset, the impact force generated by the piston rod to the outside is effectively controlled.

The application discloses a method for controlling edge water when a Mini LED backplane glass is changed in specification, 1) when the thickness of the glass plate is adjusted, three edge waters are moved, the three edge waters are connected, the third edge water felt edge part exceeds the edge of the glass plate, and the water flow of the third edge water is adjusted; 2) when the width of the glass plate is adjusted to be wider, the positions of the three edge waters are adjusted, the felt edge part of the third edge water exceeds the edge of the glass plate, the water marks of the felt of the three edge waters on the glass plate are connected along the width direction of the glass plate, and the water flow of the three edge waters is increased; 3) when the width of the glass plate is adjusted to be narrower, the positions of the three edge waters are adjusted, the felt edge part of the third edge water is located at the edge of the glass plate, the water marks of the felt of the three edge waters on the glass plate are connected but not overlapped along the width direction of the glass plate, and the water flow of the three edge waters is decreased. According to the application, different edge water parameters are adjusted according to different plate changing conditions, so that the production loss caused by the change in the specification of the glass is reduced.