5results about How to "Flow restriction" patented technology

The present application relates to the technical field of road construction, and specifically discloses a regeneration agent for hot regeneration of asphalt pavement and a preparation method thereof. In the regeneration agent of the present application, styrene-butadiene latex can form a network structure in asphalt, enhance the strength and toughness of the asphalt film, and resist the applied stress to a certain extent, hindering the plastic deformation of asphalt. At the same time, diatomaceous earth can adsorb the aromatic and saturated components in asphalt, and to a certain extent restrict the flow of asphalt. Under the joint action of styrene-butadiene latex and diatomaceous earth, the regeneration agent of the present application can make the hot regenerated asphalt have good anti-rutting performance, which is conducive to the promotion of asphalt hot regeneration technology.

This invention relates to a compound containing a pyranoquinoxaline structure and its applications, belonging to the field of organic electroluminescent materials technology. The compound containing the pyranoquinoxaline structure has the following structural formula: Ar is selected from aromatic hydrocarbon groups with 6-30 carbon atoms (deuterated or undeuterated) and heteroaryl groups with 5-30 carbon atoms (deuterated or undeuterated), wherein the heteroatoms in the heteroaryl group are selected from N, S, and O. The compound containing the pyranoquinoxaline structure is used in organic electroluminescent devices. The compound containing the pyranoquinoxaline structure of this invention, used as a host material and electron transport material in organic electroluminescent devices, can restrict carrier flow within the light-emitting layer, providing better device performance, including lower driving voltage, higher current efficiency, and extended lifespan. It significantly improves device lifespan and has good application effects in OLED light-emitting devices, showing promising industrialization prospects.

A metal target repair method is used to repair a molybdenum-tungsten alloy target, including: cleaning and grinding of the metal target, initialization of the laser cladding equipment and the powder feeding device; laser cladding in a progressive layer-by-layer manner based on a preset cross-scanning path; grinding the surface of the cladding layer after cooling, thus completing the repair of the metal target. The present invention forms a smaller molten pool by setting a cross-scanning path to perform laser cladding in a progressive layer-by-layer manner, effectively restricting the flow of the molybdenum-tungsten alloy, reducing the heat-affected zone, avoiding target performance degradation, thermal stress and deformation, and reducing the risk of local cracking.

The present invention provides a compound containing a quinazoline structure and application thereof, wherein the compound containing a quinazoline structure has a structure shown in Formula I. The compound of the present invention is used in an electron transport layer to improve luminous efficiency and extend the service life of a device.

The utility model discloses a kind of filtering and impurity removing equipment of printing ink waste liquid, including filter shell, and it is installed three groups of staggered filter assembly and collection assembly by support frame. Filter assembly contains outer filter ring, inner filter ring, inner filter screen etc., and large particle impurities are filtered through inner filter screen, and impurities are cleaned by scraping rod. Collection assembly is formed by outer filter screen etc., and is used to collect impurities. Driving shaft is rotated by connecting ring, main shaft drive driving ring. Guiding ring guides waste liquid flow, and inner filter ring controls liquid flow. Sealing structure is arranged between driving shaft and infusion tube. The equipment solves the problems of low filtering efficiency, impurity blockage, inconvenience of collection and processing, poor liquid flow and poor driving sealing of traditional equipment, realizes efficient filtering and impurity removal of printing ink waste liquid, and meets the needs of environmental protection and resource recovery.