4results about How to "Reduce dead area" patented technology

The utility model discloses a bottom sealing head structure of a heat exchanger, which comprises a cylinder body, and an upper distribution plate is fixedly arranged at the top of the inner side of the cylinder body. According to the bottom sealing head structure of the heat exchanger, an upper distribution plate, a first lower distribution plate and a second lower distribution plate are sequentially and fixedly arranged in a barrel from top to bottom; a plurality of first through holes with the diameter of 16mm, a plurality of second through holes with the diameter of 13mm and a plurality of third through holes with the diameter of 14mm are respectively formed in the middle parts of the upper distribution plate, the first lower distribution plate and the second lower distribution plate, and the plurality of first through holes, the plurality of second through holes and the plurality of third through holes are distributed in a staggered manner; the fluid in the barrel can uniformly flow through the heat exchange area, the situation that the heat exchange efficiency is affected due to uneven local flow speed is avoided, the fluid can be guided to be in a turbulent state, the dead area is reduced, and the heat transfer effect is enhanced.

The present application relates to a silicon-based detector, which designs and processes the p+ injection area of the device without changing the thickness of the substrate, and performs carbon injection, increases the area of generating electron-hole pairs and avalanche effect, thereby increasing the breakdown voltage of the device and improving the anti-radiation performance of the device. In addition, the present application introduces a deep trench ring isolation structure. Compared with the traditional silicon-based detector, the protection ring does not need to be obtained by ion implantation, the influence of the edge electric field on the performance of the device is reduced, and the dead area can be smaller when the array is formed, the integration density is improved, and the detection efficiency is improved. The present application also relates to a preparation method of the silicon-based detector.

The utility model discloses a vertical diving flow pushing device of liftable, and the flow pushing device includes the motor of power output shaft longitudinal arrangement and the impeller of motor drive connection, and the impeller shaft is longitudinally arranged and is located below the motor. The operation platform is installed at the sewage treatment pool upper end port. The lifting frame installed in the sewage treatment pool includes the guide column of longitudinal arrangement, and the guide column lower end is fixed to the pool bottom of sewage treatment pool, and the upper end is installed with the transverse plate. The guide column is located operation platform one side, and the gap is left between operation platform, and is connected with operation platform through the fixed part and is connected with each other. The sliding sleeve of slidingly sleeving on the guide column is arranged on the mounting bracket. The hoisting device for pulling the mounting frame lifting is installed on the transverse plate. The motor drives the impeller rotation, and produces the up and down flow circulation, and forms the three -dimensional circulation in the pool, avoids the flow dead angle, and promotes the uniform fluidization of the filler. Through the regulation impeller height, can adapt to different water depth or filler concentration demand.

The utility model belongs to the technical field of beam limiting devices, and particularly relates to a shielding assembly for a speed limiter and an adjustable shielding device. The fixed lead window comprises a fixed bracket and a rounded rectangular lead window, and a rectangular opening is formed in the lead window; the aperture adjusting part comprises a base and a pressing ring, an annular groove is formed in the base, a rotatable rotating disc is arranged in the annular groove, the pressing ring is used for abutting the rotating disc into the annular groove, a plurality of radial sliding grooves are formed in the rotating disc, and a plurality of shielding blades stacked layer by layer are arranged between the rotating disc and the base. The upper ends and the lower ends of the shielding blades are hinged to the rotating disc and the base through upper pin shafts and lower pin shafts respectively, the upper pin shafts are slidably installed in the radial sliding grooves, the rotating disc is rotated so that the upper pin shafts can slide in the radial sliding grooves in the direction close to or away from the center of the rotating disc, and the upper ends of the shielding blades are driven to be close to or away from each other. The shielding range of the shielding blade is adjusted; the shielding efficiency, the shielding utilization rate and the imaging quality of the beam limiting device are improved.