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69results about How to "Overcome technical difficulties" patented technology

Pressure release type backflow preventer

The invention relates to a pressure release type backflow preventer which comprises a water inlet ball valve, a first-stage check valve, a second-stage check valve and a water outlet ball valve, wherein a bypass draining pressure reducing valve is installed between the first-stage check valve and the second-stage check valve and comprises a valve cover and a valve body. The backflow preventer is characterized in that a piston body which can move left and right is distributed inside an inner cavity of the draining pressure reducing valve and divides the inner cavity into a left cavity and a right cavity, wherein the left cavity is communicated with a master water inlet by a channel arranged on the valve cover of the draining pressure reducing valve, and the right cavity leads a water inletto be communicated with a water outlet of the draining pressure reducing valve by a ring-shaped seat; the circumferential surface of the piston body is distributed with a ring-shaped sealing ring which is used for realizing sliding seal with the wall surface of the inner cavity, and the right side of the piston body is provided with a gasket which is matched and sealed with the ring-shaped seat; and a spring is supported between the piston body and the ring-shaped seat. Therefore, the pressure release type backflow preventer has simple and reasonable structure, and is easy to produce and assemble.
Owner:NINGBO HUACHENG VALVE

Method for preparing foam concrete foaming agent by sludge protein

The invention provides a method for producing a protein foam concrete foaming agent by sludge, which comprises the following steps of: adding 5-6 percent of lime into sludge containing protein; carrying out high-temperature hydrolysis for 1-2 hours in a reactor; filtering and removing slag to obtain a protein solution mixture; concentrating, and then adding 0.1-0.2 percent of protective agent and adding 3.0-3.6 percent of xanthan gum to prepare the sludge protein foam concrete foaming agent. The foaming agent has the expansion rate of foam more than 50 and the stable time more than four hours and achieves the production requirement. After foaming, the foaming agent is added with No. 42.5 cement, perlite, pulverized fuel ash and water to be uniformly mixed and can be directly used as heat insulation materials of a roof, an inner wall and an outer wall and a filling material in construction or after foaming by an air tank, the sludge protein foam concrete foaming agent is uniformly mixed with rapid-hardening sulphoaluminate, the pulverized fuel ash, a fiber and water; and a sludge protein foam concrete energy-saving plate or a sandwich plate and a sound insulating material used for a high-rise building wall or a high-noise environment can be prepared in the processes of casting and maintenance.
Owner:HUBEI UNIV

Flow guiding or flow leading type automatic drainage waterproof system

The invention discloses a flow guiding type or flow leading type automatic drainage waterproof system. According to the flow guiding type or flow leading type automatic drainage waterproof system, the surface properties, including the hydrophilicity and the hydrophobicity, of objects are fully utilized, water flow on a vertical wall surface with low hydrophobicity or hydrophilicity or accumulated water in a drainage ditch can be separated through leading and guiding or discharged through leading, or of each joint or the portion around each joint of the vertical wall surface and the inner side of the outer side wall and the upper edge of the inner side of the outer side wall of the drainage ditch are processed into the surfaces with hydrophilicity, water flow is prevented from being leaked into the joints, when the water level is slightly higher than the side wall of the drainage ditch, water is prevented from overflowing out of the side wall of the drainage ditch, and therefore the drainage performance of the vertical wall surface and the drainage performance of the drainage ditch are improved. By the adoption of the flow guiding type or flow leading type automatic drainage waterproof system, the technical problems that an existing flashing technology has high requirements for a construction technology, weather and the quality of a sealing material, the waterproof period is short, and guiding of accumulated water in the middle of the drainage ditch cannot be achieved are solved, and all products can be made of standard sections or prefabricated parts.
Owner:怀化沃普环保科技有限公司

Demanganizing direct-reverse flotation process for manganese low-grade phosphate ores

The invention discloses a demanganizing direct-reverse flotation process for manganese low-grade phosphate ores. The demanganizing direct-reverse flotation process is characterized in that after manganese and magnesium low-grade phosphate ores are subjected to ore crushing and ore grinding, manganese minerals, phosphate minerals and other minerals are subjected to monomer separation, then sodium carbonate, a direct flotation inhibitor and a direct flotation collector are added, stirring is performed for size mixing, the obtained ore slurry enters the direct flotation technological process for flotation, and the obtained in-tank product is direct flotation tailings; and the obtained foam product is conveyed to the reverse flotation process, the pH is adjusted, a reverse flotation inhibitor (citric acid) and a reverse flotation demanganizing anionic collector are added, stirring is performed for size mixing, the ore slurry obtained after size mixing enters the reverse flotation technological process for further reverse flotation, the obtained foam product is reverse flotation tailings, the final in-tank product is phosphate concentrate with low contents of MnO2, MgO and SiO2, and concentration, filtering and drying are performed to obtain the end phosphate concentrate. The demanganizing direct-reverse flotation process can successfully realize mineral processing enrichment of manganese low-grade phosphate ores and improves the utilization ratio of phosphorus resources.
Owner:WUHAN INSTITUTE OF TECHNOLOGY +2

Chinese herbal medicine compound preparation for treating pullorum disease

ActiveCN104324120AImprove \"blackImprove big and rough”Antibacterial agentsPowder deliveryMedicinal herbsWolfiporia extensa
The invention provides a Chinese herbal medicine compound preparation for treating pullorum disease with an obvious effect. The preparation is prepared from the following raw materials in parts by weight: 15-25 parts of astragalus, 35-45 parts of scutellaria baicalensis, 25-35 parts of golden cypress, 25-35 parts of the root of Chinese pulsatilla, 25-35 parts of fructus forsythiae, 15-25 parts of cape jasmine, 25-35 parts of radix paeoniae alba, 15-25 parts of pericarpium citri reticulatae, 55-65 parts of rhizome atractylodis, 10-20 parts of smoked pulm, 15-25 parts of herba portulacae, 25-35 parts of folium isatidis, 5-15 parts of radix sophorae flacescentis, 15-25 parts of the bark of ash, 25-35 parts of wolfiporia extensa. The preparation is prepared by carrying out superfine grinding on the raw medicinal materials until the particle size is 30-90 microns, weighing in a mixture ratio and uniformly mixing. The Chinese herbal medicine compound preparation provided by the invention has the efficacies of removing heat for detoxication and eliminating dampness for preventing dysentery, and mainly acts on endoretention of damp heat and pullorum disease; a micronization technology is adopted, so that medicine waste is reduced, energy is saved, and environment is protected; and dosage is reduced, and treatment cost is reduced.
Owner:山西省医药与生命科学研究院

Self-adaptive mixed connected structure-type rigid-flexible combined rail hole forming system

The embodiment of the invention discloses a self-adaptive mixed connected structure-type rigid-flexible combined rail hole forming system, and relates to the technical field of automatic assembly of aircrafts. The self-adaptive mixed connected structure-type rigid-flexible combined rail hole forming system can improve the processing quality and stability during the hole making process. The self-adaptive mixed connected structure-type rigid-flexible combined rail hole forming system comprises a gantry bridge connected to a flexible rail through a plurality of air cylinders, the flexible rail with a vacuum sucker at the bottom, and a movable hole making platform driven by a gear chain. The gantry bridge spans the two sides of a machine body, and the flexible rail is lifted and laid on the surface of the machine body through multiple groups of telescopic cylinders; and multiple groups of movable hole making platforms in parallel regulate the normal direction of a hole making tool tip through four-axis link and stably feed cooperatively, so that high-precision hole making is realized. The self-adaptive mixed connected structure-type rigid-flexible combined rail hole forming system is applied to adsorption and hole making tasks of non-convex curves.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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