5results about How to "Dense material" patented technology

The present invention relates to a dry-mixed mortar and a preparation method and application thereof, belonging to the technical field of premixed mortar. The dry-mixed mortar of the present invention comprises the following components in parts by weight: 200-300 parts of cementitious material, 1-2 parts of cellulose ether A, 0.3-0.8 parts of cellulose ether B, 0.3-0.5 parts of starch ether, and the aggregate is supplemented to a total weight of 1000 parts; the viscosity of the cellulose ether A at 25°C is 30000-40000 mPa·s; the viscosity of the cellulose ether B at 25°C is 100000-120000 mPa·s. The present invention obtains a dry-mixed mortar with good water retention, fluidity, cohesiveness and crack resistance by combining specific slag powder, silica fume, cellulose ether, starch ether, redispersible latex powder and polypropylene fiber with cementitious material and aggregate. The dry-mixed mortar is applied in building decoration, has low requirements on the wetness of the wall, and can overcome the shortcomings of ordinary mortar such as easy slurry bursting and large shrinkage.

The invention discloses a power communication optical cable network monitoring device, which relates to the technical field of communication optical cables and comprises a monitoring assembly, and a protection assembly is arranged on the outer surface of the monitoring assembly. When the electrostatic cleaning device is used, a first forward and reverse motor is started, a rotating column, a driving gear, a chain, a driven gear and a threaded sleeve are driven to rotate, a threaded rod is driven to move under the limiting of a limiting rod and a limiting block, a cleaning rod is pushed to enter a connecting port, and nano sponge and electrostatic adsorption fiber cloth can be tightly attached to the inner wall of the connecting port; the electrostatic adsorption fiber cloth adsorbs dust on the inner wall of the connecting port through the electrostatic effect, and the cleaning effect is enhanced. The materials of the electrostatic adsorption fiber cloth and the nano sponge are relatively compact, fiber batting which is easy to fall off like a cotton swab is avoided, the interior of the connecting port is prevented from being scratched, a worker does not need to carry the cotton swab, and the situation that cleaning is inconvenient is avoided.

This invention provides an impeller for a centrifugal blower with a riveting structure, comprising a front disc, a rear disc, and blades. Each blade includes a blade body with multiple blade fixing teeth on both sides. The front and rear discs have multiple riveting holes. The blades are connected to the front and rear discs via the blade fixing teeth passing through the riveting holes. After passing through the riveting holes, the front ends of the blade fixing teeth on both sides of the blade body are located on the outer sides of the front and rear discs, respectively. The outer blade fixing teeth are locked to their adjacent outer ends, achieving riveting fixation between the blades and the front and rear discs. This impeller uses a riveting method, which has a short processing cycle and low investment cost. Furthermore, it is made of aerospace-grade aluminum plate, which has high strength and can be applied to large-diameter, high-speed impellers. At the same time, the lightweight nature of aerospace-grade aluminum plate does not increase the bearing load. This invention can be widely applied to the processing of impellers in centrifugal blowers.

The invention relates to a forged three-way hollow valve body prefabricated part and machining equipment and method, the valve body prefabricated part comprises a valve body and a flange located at the end of the valve body, three hollow inner holes are formed in the valve body, the three hollow inner holes are non-through holes extending from the three ends to the center of the valve body, and the flange is located in the valve body. The valve body, the flange and the three hollow inner holes are directly formed through integrated forging machining. According to the forming equipment, machining devices in three directions are matched, so that the three-way hollow valve body has an uninterrupted material tissue streamline, the material is more compact under the action of pressure stress, the fatigue life of parts can be prolonged, and the compression resistance and bending and torsion resistance strength of the parts can be improved; and the subsequent three-way inner hole machining procedure is reduced, the influence caused by subsequent heat treatment or machining is avoided, the defects of energy waste and low efficiency caused by step-by-step forging forming and repeated heating are overcome, the production efficiency of the product and the material utilization rate are improved, and the production cost of the product is reduced.

The invention discloses an isostatic pressing ceramic tube shell which comprises a ceramic body and a metal tube shell matched with the ceramic body for use, the ceramic body is formed by sintering a dry base made of powder and a forming aid after blank making, and the forming aid accounts for less than 8% of the weight of the dry base during blank making. The dry basis comprises the following components in percentage by weight: 5%-15% of CaO, 3%-10% of MgO, 20%-35% of AL2O3 and 40%-60% of SiO2, and the sintered ceramic body does not contain a forming aid. The preparation method comprises the steps of ceramic body blank preparation, blank shape treatment, blank sintering, surface treatment and shaping treatment, and finally, isostatic pressing ceramic tube shell finished products are detected and put in storage. A quaternary system formula (CaO, MgO, AL2O3 and SiO2) is adopted, the performance index is good, the isostatic pressing ceramic tube shell core is a calcium-magnesium-aluminum-silicon system ceramic system and is suitable for being matched and sealed with a metal tube shell, and compared with a traditional ternary system formula, the calcium-magnesium-aluminum-silicon system isostatic pressing ceramic tube shell has the advantages of being low in dielectric loss, large in volume resistance, large in bending strength, high in acid resistance and the like.