3results about How to "Fully closed" patented technology

This utility model relates to the technical field of door hardware equipment, specifically, to a door hinge, comprising: a fixed body; a moving body, which has a sliding block that can slide along the depth direction of the moving body, wherein one side of the sliding block has a trajectory surface, a first trajectory surface, a second trajectory surface, and a third trajectory surface in sequence, the angle between the starting end of the first trajectory surface and the trajectory surface is α1, the angle between the starting end of the second trajectory surface and the trajectory surface is α2, and the angle between the starting end of the third trajectory surface and the trajectory surface is α3, α1<α2<α3; a linkage assembly, including multiple linkage blocks, the two ends of which are respectively connected to the fixed body and the moving body, and one linkage block is hinged to the sliding block; and a self-closing mechanism, which is disposed in the moving body near the trajectory surface and can extend and retract along the length of the moving body. When the end of the self-closing mechanism abuts against the trajectory surface and extends, it drives the sliding block to slide into the moving body. This door hinge can still achieve automatic closing even when closed to a small angle.

This invention discloses a hot isostatic pressing densification method for impregnated coating of ball valve cores, belonging to the field of metal surface coating technology. The method specifically includes the following steps: (1) substrate pretreatment and coating preparation; (2) activation of the coating's thermoplastic state; (3) encapsulation-type near-isostatic pressing densification treatment; and (4) unloading, cooling, and finishing. The core of this invention lies in the synergistic effect of "thermoplastic softening" and "uniform pressure application with full spherical encapsulation." By applying a uniform pressure of approximately isostatic pressure to the coating in its thermoplastic state, the internal pores are efficiently closed, improving the coating's density and overall mechanical properties without damaging the coating's integrity or the workpiece's geometric accuracy.

This invention proposes a multi-stage impactor aerosol sampler and continuous monitoring system, belonging to the field of radioactive environment monitoring. It addresses the problem of extremely high exposure risks during filter replacement when traditional impactor samplers are applied to high-intensity radioactive environments. It includes a cylindrical sealed tower body containing multiple longitudinally connected aerodynamic separation units. Each separation unit has a radial opening on the tower wall, with the radial openings arranged spirally and staggered along the circumference of the tower body. A drawer-type sampling box includes a shielded drawer box, which can be radially inserted and removed into the radial openings. A bypass channel and sliding valve linkage mechanism, located inside the tower body, includes a bypass branch connected in parallel with the main gas channel, and a sliding valve located at the intersection of the main gas channel and the bypass branch. It is primarily used in the uranium mining field.