38results about How to "Easy to withstand high temperature" patented technology

A flexible dual-band planar microstrip antenna comprises a first U-shaped resonator (1), a second U-shaped resonator (2), a first rectangular branch (3), a second rectangular branch (6), a first rectangular ground (4), a second rectangular ground (7), a feeder (5) of the flexible microstrip antenna and a polyimide medium plate (8). A flexible polyimide material serves as the medium plate, so that the antenna has good folding and bending characteristics. Two U-shaped quarter-wave resonators of different sizes are used for coupling, so that ultra-wind band coverage of a first band from 1 GHz to 2.5GHz is achieved on the condition that the dual-band characteristic of the antenna is kept. The two rectangular branches are symmetrically distributed on the two sides of a U-shaped irradiator, and are used for achieving coverage of a second communication band of 5.5GHz. A coplanar waveguide feed method is adopted, so that the whole antenna is totally integrated on one side of the medium plate and is easy to adhere, and severe influences on performance of the antenna are not generated. The flexible dual-band planar microstrip antenna is suitable for various electronic products with microstrip antennas.

The present invention discloses one kind of conductive plastic and its processing method and apparatus. The conductive plastic includes conductive fiber 0.1-45 vol%, thermoplastic plastic 55-99 vol% and machining assistant 0-3 vol%. The conductive fiber is arranged in 3D netted form homogeneously with multiple joining points, and the conductive plastic has high conductivity, high antistatic and electromagnetic shielding effect, and low surface resistance and volumetric resistivity, and may be injected, extruded and molded like common plastic.

The invention provides an extraction method of lincomycin. The extraction method mainly comprises the following steps: adjusting acidity of fermentation liquor, filtering by using a ceramic ultrafiltration membrane, then adjusting alkalinity, then filtering by using a ceramic ultrafiltration membrane again, then carrying out primary sec-octyl alcohol extraction and hydrochloric acid back-extraction, adjusting alkalinity of the primary back extraction liquor and then filtering by using a ceramic ultrafiltration membrane again; carrying out secondary sec-octyl alcohol extraction and hydrochloric acid back-extraction and adding acetone to the secondary back extraction liquor to carry out evaporative crystallization. According to the extraction method provided by the invention, the yield of the lincomycin is high, the color grade of the lincomycin can be improved, and the B component content in the lincomycin is reduced. According to the extraction method of the lincomycin, the feed liquid quality of other extraction technologies can be improved by a membrane treatment process, the integral extraction efficiency is further improved, the residual volume of sec-octyl in raffinate in the extraction procedure is reduced, the product quality is improved, and meanwhile, the COD (Chemical Oxygen Demand) in produced wastewater is reduced. The extraction method has certain economic benefit and environmental benefit.

This invention relates to a method for processing electrochemical combination electrodes sealed by the nm flexible epoxy resin material including: 1, inserting a working electrode matrix material into a conductive support copper rod wrapped with an insulation pyrocondensed tube, a hole Ag reference electrode is welded to the support copper rod, the bottom of a hole Pt counter-electrode is welded to the support copper rod, the hole Ag reference electrode, the hole Pt counter-electrode and the working electrode matrix are arrayed from inside to outside with the working electrode at the middle, the tops of which are at a same plane, the support copper rods of them are fixed by a pyrocondensed tube and put into a die set and fixed, 2, casting the nm flexible epoxy resin material onto the die set to deaerate and cure it, 3, taking out the electrode after cooling it and polishing it.

A food drying system includes: a plurality of drying chambers, a steam system, a front chamber door, a rear chamber door, a control panel and a plurality of trolleys; the drying chamber includes: an exhaust system and two There are two circulation systems, and the exhaust system is placed in the middle of the two circulation systems; the exhaust system includes: a fresh air heat exchanger, an exhaust fan, a damper and an exhaust duct, and the fresh air heat exchanger and the exhaust duct The air valve and the exhaust fan are arranged in sequence between them; the circulation system includes: a circulation fan, a manual air valve and a heat exchanger, and the manual air valve is placed between the circulation fan and the heat exchanger; the steam System, including: steam pressure reducing valve, sub-cylinder, pipeline, steam coil, steam trap and control valve group, the control valve group is connected with the control panel, the pipeline is connected with the heat exchanger in the circulation system, and the steam system is placed in the equipment room The system is suitable for drying a large number of drying products, and the drying speed is fast and intelligent automatic control can be realized.

The invention discloses a water-based environment-friendly metal welding base metal protective agent. The water-based environment-friendly metal welding base metal protective agent is prepared from, by weight percent, 9%-15% of a polymer film-forming agent, 8%-16% of a spreading agent, 5%-10% of a wetting flatting agent, 0.5%-5% of a rust-inhibiting additive, 12%-18% of a cosolvent and 45%-65% of deionized water. The raw materials adopted in the protective agent are environment-friendly, non-poisonous and degradable components; the prepared metal welding base metal protective agent can effectively avoid welding splash adhesion, is easy to clean and moderate in viscosity, and has excellent antirust performance; and the protective agent is suitable for multiple welding positions of flat welding, transverse welding, vertical welding, overhead welding and the like. The invention further discloses a preparation method of the water-based environment-friendly metal welding base metal protective agent. According to the preparation method, no heating is needed, operation is easy, the application range is wide, and cost is low.

The invention relates to a production process of a freon resistant, double glass fiber covered enamelled wire, which solves problems of lag in an existing production process of glass fiber covered enamelled wires, large waste of raw materials, high energy consumption, environmental pollution and quality instability. The production process ensures quality of finished products and work efficiency by the following steps: strictly selecting the raw materials, taking the raw materials into a softening furnace for solidifying treatment by freon resistant insulating impregnating varnish; covering with conductor glass fiber, wherein, two layers of the glass fiber are covered in reverse directions to prevent single cladding; and controlling temperature of a baking furnace and the like. The production process has rational design, simple process, low manufacturing cost, low operating cost, reliable work, high efficiency, stable quality and strong workability, can help manufacture a plurality of different single and double glass fiber, paper covered and enamelled flat copper wires, round copper wires and irregular copper wires, and various electromagnetic wires for different uses, and the production process has wide market prospect.

The invention provides a sealing device and a mechanical sealing packer, the sealing device comprises an upper open block, a hydraulic medium, a bimetal convex-concave spring and a lower open block, wherein the bimetal convex-concave spring comprises red copper and a convex-concave spring, the red copper is laid and welded on the surface and the side surface of the convex-concave spring, the bimetal convex-concave spring is arranged vertically, the hydraulic medium is placed in the bimetal convex-concave spring, and the upper open block and the lower open block for extruding and closing the hydraulic medium are respectively connected above and below the hydraulic medium; the mechanical sealing packer is provided with the sealing device; and the sealing device and the mechanical sealing packer provided with the sealing device have the characteristics of high temperature resistance and high pressure resistance, and have very important production practical significance in exploitation process of thick oil.

The invention relates to the technical field of oilfield chemistry, in particular to an oil and water well sealing and plugging agent and a preparation method of the oil and water well sealing and plugging agent. The oil and water well sealing and plugging agent is suitable for sealing and plugging an oil and water well. The oil and water well sealing and plugging agent consists of the following raw materials: XP lost circulation additive, G-class oil-well cement, blast furnace KZ micro powder, borax and water. The oil and water well sealing and plugging agent has the beneficial effects that the oil and water well sealing and plugging agent is simple to prepare, is convenient to construct, is safe and reliable and has high plugging strength; the oil and water well sealing and plugging agent has the characteristics of excellent suspension stability, low initial viscosity, easiness for pumping, high temperature resistance, high curing strength and the like and is mainly applied to non-corresponding production layers caused by poor cementing quality or damage to a sleeve above and below a perforated section of the oil and water well; the requirements on sealing and plugging of the oil and water well can be met; and currently, the oil and water well sealing and plugging agent is accumulatively implemented for over 90 well times, good sealing and plugging effects are obtained and the water injection efficiency is also improved.