3results about How to "Delay premature failure" patented technology

The utility model discloses a bag type dust collector for gas purification of a steelmaking converter. The ash bucket is of a double-layer ash bucket structure with an inner ash bucket (4) and an outer ash bucket (3); an ash bucket partition plate (5) is arranged between the inner ash bucket (4) and the outer ash bucket (3); an inlet of the air inlet pipe (1) is formed in the lower part of the middle box body (8) or the side surface of the upper part of the outer ash bucket (3); an inner ash bucket ring beam (6) is arranged in a cavity between the lower part of the filter element (9) in the middle box body (8) and the upper part of the outer ash bucket (3) and the air inlet pipe (1); and a passageway partition plate (7) is arranged in an arch-shaped cavity between the upper part of the inner ash bucket ring beam (6) opposite to the air inlet pipe (1), the outside of a filtering area in the middle box body (8) and a wall plate of the middle box body (8). According to the utility model, not only can the scouring of airflow to the filter bag be reduced, but also coal gas or oxygen-containing flue gas remained in the dust remover can be driven in real time, the contact and mixing probability of the coal gas and oxygen is effectively reduced, the occurrence of burning and explosion accidents is avoided, and the safety of equipment is obviously improved. The device is safe, efficient, energy-saving and economical.

The present application relates to the technical field of electrical control, and particularly relates to a load prediction-based intelligent tap-changer method and system for distribution transformer without power interruption. Multi-source operation data of the load voltage regulating unit of the distribution transformer is loaded first to accurately evaluate the remaining life thereof; then the voltage qualified dead zone width and the double-target optimization function weight coefficient are dynamically set according to the remaining life, and the minimum action interval for tap-changer is configured in combination with the historical action frequency; when the voltage is out of limit, the tap position instruction is generated through double-target optimization, and the tap-changer is executed according to the instruction and the interval and the action information is updated, so that the dynamic balance between the voltage quality and the switch life is realized, and the frequent tap-changer is inhibited. The dynamic balance between the voltage quality guarantee and the load tap changer life protection in the process of tap-changer without power interruption for the distribution transformer can be realized.

The application discloses an anti-stone degradable medical magnesium alloy and a preparation method thereof, relates to the technical field of biomedical materials, and aims to solve the technical problems that the prior art cannot simultaneously realize degradable control, interface stability and active anti-stone. The application comprises the following steps: S1. Rheocasting preparation of a magnesium alloy base body: magnesium alloy raw materials are melted under a protective atmosphere, overheated to 50-80 DEG C above the liquidus, poured onto a cooling plate with an inclination angle ranging from 30 to 60 DEG to form a semi-solid slurry, pressed into a mold at a pressure of 80-150 MPa and a speed of 0.2-0.5 m / s, and the mold is opened after pressure and heat preservation for 5-10 min, so that the magnesium alloy base body is obtained. The application has excellent anti-stone performance. On a physical level, the composition gradient transition structure uniformly releases the corrosion products of the magnesium alloy in the form of fine particles, and avoids the accumulation of large products to form stone cores.