52results about How to "Long aging life" patented technology

The invention discloses a compression-resistant, abrasion-resistant and corrosion-resistant transformer seal ring as well as a production method thereof. Chemigum is adopted as a main raw material, and forms synthetic rubber with high-tenacity reclaimed rubber and coumarone resin, and the synthetic rubber has extremely good oil resistance, abrasion resistance and thermal resistance; the synthetic rubber is matched with carbon black, ceramic micro powder, silicon powder, manganese powder, teflon, zinc oxide, argil, vulcanizing activators and hot-oxygen aging resistant agents, so that the performance of tearing resistance, self-lubricating effect, compression deformation resistance, thermal resistance, corrosion resistance, abrasion resistance and the like of the seal ring can be improved effectively, and the service life of the seal ring is prolonged. The favorable seal effect can be protected in severe cold and hot climate environments, and the service life of the seal ring is more than twice that of a traditional seal ring.

The invention relates to an environmental friendly lead-free aluminum slurry and a preparation method thereof. The environmental friendly lead-free aluminum slurry comprises the following components: antioxidant ultrafine aluminum alloy micropowder, barium ferrosilicon borate composite frit and a composite organic carrier. The invention has the advantages that the prepared lead-free aluminum slurry is an environmental friendly electronic slurry without harmful substances including lead, cadmium, mercury and hexavalent chromium, is used as a function material, completely replaces lead containing aluminum slurry, is stable and reliable, and has excellent performance, favorable ohmic contact quality, wide sintering temperature range, low sheet resistance, water boiling resistance, long ageing life and favorable replaceability to noble metals.

The invention relates to a VPI stator wire bar. The VPI stator wire bar consists of a straight line part and two end parts. The straight line part comprises a lead wire board, displacement gaskets, displacement fillers, an inter-row insulator, an internal pressure equalizing layer, an insulator to ground, an anti-corona processor, an additional insulator and an electromagnetic wire, wherein the inter-row insulator wraps the lead wire board; the displacement gaskets are arranged at the two side ends of the inter-row insulator; the electromagnetic wire wraps the inter-row insulator and the displacement gasket; the displacement fillers are fixed at the two side ends; and the internal pressure equalizing layer, the insulator to ground, the anti-corona processor and the additional insulator sequentially wrap the structure. Each end part comprises a conducting board, an inter-row isolator, an internal pressure equalizing layer, an insulator to ground, an anti-corona processor, an additionalinsulator and an electromagnetic wire, wherein the inter-row insulator wraps the conducting board; the electromagnetic wire is fixed on the two wide end faces of the inter-row insulator; and the internal pressure equalizing layer, the insulator to ground, the anti-corona processor and the additional insulator sequentially wrap the structure. The VPI stator wire bar of the invention has the advantages of fewer layers, thin layers and thin whole body.

The invention discloses an optical fiber ultrasonic sensor with a high signal to noise ratio based on a polytetrafluoroethylene (PTFE) film. The optical fiber ultrasonic sensor comprises a standard single-mode fiber, wherein one section of multimode fiber with gradient index is in fusion welding with one end of the standard single-mode fiber to form an optical fiber collimator; the end face of theoptical fiber collimator and the PTFE film form two reflecting surfaces of an F-P interferometer; the PTFE film is used as a response media of ultrasonic waves and is stuck at one end of an aluminumtube; an organic glass tube is arranged inside the aluminum tube; and a moving part is fixed with AB glue. The optical fiber ultrasonic sensor disclosed by the invention has the advantages of small size, low cost, simplicity and convenience in production, excellent ultrasonic response and high signal to noise ratio. The optical fiber ultrasonic sensor disclosed by the invention is applied to scanning imaging of a seismic physical model, a multilayer model structure can be distinctly differentiated and a model ultrasonic image is reconstructed, which shows that the optical fiber ultrasonic sensor has potentials in the fields of structural health monitoring, biomedicine and the like. With higher temperature resistance and corrosion resistance, the optical fiber ultrasonic sensor also can beapplied to severe environments such as high-temperature ultrasonic flaw detection.

The invention provides a high-performance direct-current zinc oxide varistor and a preparation process thereof. The varistor is prepared from the following components in parts by mol: 90 to 98 parts of ZnO, 0.5 to 7 parts of Bi2O3, 0.1 to 10 parts of Sb2O3, 0.1 to 2 parts of Co2O3, 0.1 to 5 parts of SiO2, 0.1 to 5 parts of MnO2, 0.1 to 5 parts of Cr2O3, 0.1 to 4 parts of NiO, 0.1 to 1 part of B2O3, 0.01 to 0.6 part of Al(NO3) 3.9HO, 0.01 to 0.5 part of V2O5, 0.01 to 0.5 part of CeO2 and 0.05 to 0.5 part of silver glass powder. According to the varistor and the preparation method thereof, by adding B2O3, V2O5, CeO2 and silver glass powder in a traditional varistor, and by coating a varistor blank surface with bismuth-containing oxide during high-temperature firing and by carrying out direct-current coating and diffusion treatment on the varistor obtained by high-temperature firing according to the preparation process, various performances, such as aging resistance, rectangular wave current impact tolerance stability and large current impact tolerance stability of the varistor can be greatly improved, and the preparation process has the advantages of low cost, high efficiency and the like.

The invention relates to an oil recovery method of closed circulation and viscosity breakback of hot oil in a viscous oil well and a device; the method comprises the following steps of: putting the crude oil into a heating system of a special device, adopting two sets of systems with burning of coal or gas or a single system with burning of coal or gas, being capable of adopting one well with one system or a plurality of wells with one system, and heating and injecting the crude oil into the well for closed circulation. The device comprises a heating system, a buffering tank, an injecting circulating system and an oil pumping system; the circulating system comprises a telescoped central pipe and a telescoped outer sleeve; the telescoped central pipe is sleeved into the telescoped outer pipe, an opening of the lower end thereof is a free end and the upper end thereof is connected with a circulating valve, an injecting pipe, a surface flow pipe, a boosting pump, the buffering tank and the outlet of the heating system in sequence; the lower end of the telescoped outer pipe is connected with the oil-well pump and the upper end thereof is connected with a polished rod, a drain pipe and the inlet of a heating system in sequence by a polished rod sealer; and the upper end of the circulating valve is connected with a polished rod eye of an oil pumping unit. The invention has the characteristics of good heat exchange performance, good viscosity breakback, high pump efficiency, and the like and is widely applied in viscous oil recovery technology.

The invention relates to a die for producing a water-base polyurethane condom. The die is made of a polytetrafluoroethylene material, namely the die can be made of a pure polytetrafluoroethylene material and also can be made of the polytetrafluoroethylene material added with glass fibers or the polytetrafluoroethylene material added with iron powder. The die can bear the change of high and low temperature repeatedly, realize a membrane-carrying drying process in a straight dipping method of the condom and reduce adhesion degree between the die and a glue membrane, and has the advantages that the glue membrane is easy to crimp and is non-stick.

The invention relates to a mechanically-and-electrically-integrated packing machine for gloves, in particular to an automatic packing machine for soft gloves. The automatic packing machine for soft gloves aims at achieving the technical purpose of overcoming defects of the prior art. Air cylinders of the packing machine are reduced in the boxing procedure and the box sealing procedure, the packing procedure is optimized, and a new technical scheme is provided. The packing machine is simple in structure, low in cost and reliable in operation. Packing of side lugs of packing boxes is completed through slope sections of two tow chains. The packing machine further comprises a bicircular box unfolding mechanism and a tow chain movement boxing mechanism, wherein two rows of parallel double-gear-form chains are adopted in the tow chain movement boxing mechanism. Due to the fact that boxing is conducted through movement of the double-gear-form chains, an erecting air cylinder, a positioning air cylinder and other links in a packing machine in the prior art are eliminated. The automatic packing machine is simple in structure, convenient to operate and safe and reliable to use.

The invention provides a modified polytetrafluoroethylene, a preparation method of the modified polytetrafluoroethylene and application of the modified polytetrafluoroethylene to a high frequency connector. The modified polytetrafluoroethylene is obtained through polymerization reaction of tetrafluoroethylene and perfluoropropoxyethylene; a side group is introduced into a molecular chain of the polytetrafluoroethylene; crystallinity and melt viscosity of the polytetrafluoroethylene are reduced; and when original excellent performance of the polytetrafluoroethylene is basically kept, processing performance of the polytetrafluoroethylene is improved to enable the modified polytetrafluoroethylene to be formed by injection molding, so that the production process is simplified and the production efficiency is improved. When the high frequency connector is produced, the injection molding can be carried out in one step and the post processing step is omitted.

The invention discloses a polytetrafluoroethylene composite isolation membrane for a lithium battery. The polytetrafluoroethylene composite isolation membrane comprises an isolation membrane which is a polyethylene microporous membrane or a polypropylene microporous membrane or a composite membrane of the polyethylene microporous membrane and the polypropylene microporous membrane; and the polytetrafluoroethylene composite isolation membrane is characterized in that: a polytetrafluoroethylene microporous membrane is coated on an end face and two sides of the polyethylene microporous membrane, or a polytetrafluoroethylene microporous membrane is coated on an end face and two sides of the polypropylene microporous membrane, or a polytetrafluoroethylene microporous membrane is coated on an end face of the polyethylene microporous membrane of the composite membrane of the polyethylene microporous membrane and the polypropylene microporous membrane and on two sides of the composite membrane. The polytetrafluoroethylene composite isolation membrane for the lithium battery can effectively isolate positive and negative plates of the lithium battery and completely eradicate a short circuit; moreover, the lithium battery is safe and reliable and has no accident in the charging and discharging processes. The polytetrafluoroethylene composite isolation membrane for the lithium battery can be used for isolating the positive and negative plates of the lithium battery.

The invention discloses a corrosion-resistant and water-blocking aluminum-sheathed single-conductor heating cable and a method for preparing the same. The heating cable comprises a heat-generating conductor and a group consisting of an XLPE insulating layter, an corrosion-resistant functional coating layer, a PET semiconductor wrapping tape layer, a metal shielding layer, a water blocking layer, an insulation fireproof wrapping tape layer, an aluminum alloy sheath, a neoprene inner sheath, a CPE heat-resistant layer and a neoprene outer sheath which successively coat the heat-generating conductor. The water blocking layer is formed co-extruding an MDPE water-blocking inner layer at the inner side and a LDPE water blocking outer layer at the outer side. The cross-sectional profile of the aluminum alloy sheath is in a gear shape. The heating cable, by structurally optimized design, is greatly improved in thermal efficiency, has good corrosion resistance and water resistance, reduces energy consumption, and has a long service life.

The invention discloses a U-shaped capacitive liquid level meter, which is composed of an electrode insulation outer sleeve, a transmitter casing, a displayer, a transmitter circuit, an inner electrode, a flange and an outer electrode. The transmitter circuit is composed of a power supply circuit, a pulse output circuit, a phase step time integrating circuit and an RC phase step circuit. The U-shaped capacitive liquid level meter has the advantage that 1 the electrode sleeve adopts the U-shaped structure in design, the changing area is twice that of pole type sleeve, and measurement is led tobe stable and accurate; and 2 the liquid level meter adopts a Teflon pipe with good performance as a material, the material has the advantages of high temperature resistance, abrasion resistance, weather resistance, high lubrication, non-adhesiveness, non-toxicity and excellent electric performance, and the liquid level meter can perfectly and completely measure liquid level under the effects of temperature, pressure fusion, molasses adhesion, molasses adhesion and scale deposition even the dielectric parameter is affected by temperature.

The invention discloses combined In3+ and Sn4+ donor doped ZnO varistor ceramic and a preparation method thereof; the combined In3+ and Sn4+ donor doped ZnO varistor ceramic comprises a base material and a doping material, wherein the base material comprises, by weight, 87-95 parts of ZnO, 2.0-4.0 parts of Bi2O3, 0.4-0.7 part of MnO2, 1.5-3.5 parts of Sb2O3, 0.5-1.5 parts of Co2O3, 0.1-1.0 part of Cr2O3, and 1-5 parts of seed crystal doping material; the seed crystal doping material comprises ZnO, SnO2 and In2O3 having a mass ratio of (90-95):(0.1-5):(0.1-5). The combined In3+ and Sn4+ donor doped ZnO varistor ceramic has the advantages that ZnO grain resistivity can be decreased and ZnO lattice distortion can also be controlled, and also has the advantages of low final ZnO varistor residue, long ageing life and high pulse current tolerance.

The invention relates to a K1-type electrical connector assembly of a mineral insulated cable for nuclear power, and the assembly comprises a cable assembly, and a plug and a socket which are respectively spliced with two ends of the cable assembly. The cable assembly is characterized in that the cable assembly comprises a mineral cable, a corrugated pipe wrapped outside the mineral cable, a positioning plate for fixing the mineral cable, and a stainless steel pipe welded with the positioning plate; the stainless steel pipe is internally provided with a glue pouring area and a switching jack contact piece; the switching jack contact piece is of a double-end jack structure, one end of the switching jack contact piece is electrically connected with the mineral cable core wire through a barewire, and the other end is plugged with the plug or the socket; the plug comprises a connecting nut, a spline housing, an insulator part, and a glass sintering part which is in butt joint with the double-end jack contact part; the socket is of an integrated structure formed by sintering a socket shell, a glass cake II and a double-end contact pin contact piece II through glass. The assembly provided by the invention is resistant to irradiation and aging and long in service life, and it is guaranteed that the product can still be used after being subjected to severe accident working conditionswhile the using requirements of a nuclear-grade K1-type electrical connector are met.

The invention discloses a preparation method of a pure silicon BETA molecular sieve with ultraviolet resistance, wherein the preparation method comprises the steps: step 1, mixing raw materials according to a molar ratio of SiO2:(0.3-0.6)B2O3:(0.75-1.5)template agent:(10-20)water to obtain a gel reactant; step 2, carrying out hydrothermal dynamic crystallization at the temperature of 120-180 DEG Cfor 4-8 days, filtering, washing and drying the crystallized product, and roasting at the temperature of 500-700 DEG C for 4-6 hours to obtain a silicon-boron molecular sieve B-MWW; step 3, mixing the prepared silicon-boron molecular sieve B-MWW matrix with ammonium nitrate or ammonium chloride with the concentration of 4-10 mol/L according to the mass ratio of 1:(30-50), carrying out acid pickling treatment for 2-6 hours at the temperature of 60-90 DEG C, repeating the acid pickling operation twice, and then filtering; and washing, drying and roasting at the temperature of 500-700 DEG C for6-10 hours to obtain the pure silicon BETA molecular sieve raw powder. The pure silicon BETA molecular sieve prepared by the method is used as an anti-aging auxiliary agent of plastic, and the anti-ultraviolet aging life of the plastic added with the molecular sieve can be prolonged by 3 times or more compared with that of a plastic added with a common anti-aging auxiliary agent.

The invention discloses combined In3+ and Ga3+ donor doped ZnO varistor ceramic and a preparation method thereof; the combined In3+ and Ga3+ donor doped ZnO varistor ceramic comprises a base material and a doping material, wherein the base material comprises, by weight, 87-95 parts of ZnO, 2.0-4.0 parts of Bi2O3, 0.4-0.7 part of MnO2, 1.5-3.5 parts of Sb2O3, 0.5-1.5 parts of Co2O3, 0.2-1.0 part of Cr2O3, and 1-5 parts of seed crystal doping material; the seed crystal doping material comprises ZnO, Ga2O3 and In2O3 having a mass ratio of (90-95):(0.1-5):(0.1-5). The combined In3+ and Ga3+ donor doped ZnO varistor ceramic has the advantages that ZnO grain resistivity can be decreased and ZnO lattice distortion can be controlled, and also has the advantages of low finish ZnO varistor residue long ageing life and high pulse current tolerance.

The invention discloses a composite frame type low-voltage bus slot. The composite frame type low-voltage bus slot comprises a plurality of bus straight-line segment brackets, a joint segment is connected between every two bus straight-line segment brackets; the invention further discloses a manufacturing method of the composite frame type low-voltage bus slot, and mainly comprises the following steps: selecting material, pre-manufacturing the straight-line segment bracket, filling potting material, manufacturing the joint segment, and filling the potting material; the application performance of the low-voltage bus slot is improved, the conductor and the insulating sleeve are fixed through the tenacity material; the expansion defect between the conductor and the insulating material is avoided when the temperature of the conductor is changed; the low-voltage bus slot is low in internal bubble content, small in bubble size, low in dielectric loss of insulating material, high in voltage resistance, and low in ageing life; the insulating material is high in density, good in tensile resistance, bending resistance and torsion resistance; the insulating material can adopt the heating curing process, the curing period is shortened to tens of minutes or several hours, and the insulating material can be extensively applied to the industrial and mining power distribution industry.