178results about How to "Stable service life" patented technology

The invention relates to the technical field of porous ceramic materials and film separation, in particular to a low-temperature sintering acid and alkali resistant porous silicon carbide ceramic filmand a preparation method thereof. The method sequentially comprises the following steps of (1) support body manufacturing; (2) transition layer processing; (3) filtering layer processing; (4) film sintering process. The method provided by the invention has the characteristics that the sintering temperature is low; the production energy consumption is low; the process method is simple; the equipment requirements are low; the production cost and the investment cost are low; the control is flexible; the shaping is easy; the method is suitable for industrial customization and meets the scaled production. The porous silicon carbide ceramic film produced by the method has the characteristics of good hydrophilcity, great filtering flux, high porosity, high filtering precision, high mechanical intensity, good acid and alkali resistant performance and long service life.

The invention relates to a printing plate quality detection system and method. The system comprises a detection platform, an electric device, an image acquisition device and an image processing device, wherein the image acquisition device comprises an annular optical imaging light source, an area-array camera and a laser displacement sensor; the annular optical imaging light source comprises an annular frame body, a heat radiation sheet arranged on the outer side wall of the annular frame body and a plurality of LED (Light Emitting Diode) light sources arranged on the inner wall of the annular frame body; the annular optical imaging light source is used for uniformly illuminating in a focal plane of the area-array camera; the area-array camera is used for automatically scanning a detection object which is horizontally arranged on the detection platform under the irradiation of the annular optical imaging light source to acquire a high-quality image in the horizontal plane and carry out image pattern detection; the area-array camera or the laser displacement sensor is used for acquiring the depth of the detection object in the vertical direction so as to carry out depth measurement; the image processing device is used for carrying out data processing and analysis on image information to finish the quality detection. The system and the method have the advantages of high detection precision, high detection speed and high reliability.

The invention discloses a heating layer of a megawatt-grade wind power blade mould and a heating method thereof. The heating layer is arranged between an internal structure layer and an external structure layer that are formed on the surface of the mother mould of the mould; the invention is characterized in that the heating layer comprises at least three sections of heat conducting layer; each section of heat conducting layer is plainly paved at the corresponding positions of the blade tip, the middle part of the blade and the blade root at equal distance in the form of parallel arrangement by a plurality of guide copper pipes that bend into S shape; two ports of the guide cooper pipe extend out of the surface of the external structure layer and is connected with a heating device arranged externally; the heating method comprises the following steps: hot water is led into the heating layer cyclically, so as to meet the circulation mode of water of hot curing of wind power blade products; the hot water flows on the surface of the mould continuously, cyclically and repeatedly, thus meeting the temperature requirement of wind power blade products when in curing. The arrangement of the heating layer improves the moulding quality of large blade products; the dead weight of the mould is reduced, the production cost is low, and the heating method is safe and stable and is easy for application.

The invention discloses an unfired magnesia-calcium brick which is prepared from the following raw materials in percentage by weight: 9-16 percent of 5-7mm magnesia-calcium sand, 9-16 percent of 3-5mm magnesia-calcium sand, 9-16 percent of 1-3mm magnesia-calcium sand, 9-16 percent of 0.5-1mm magnesia-calcium sand, 4-16 percent of 0.5-1 mm magnesia sand, 5-25 percent of not larger than 0.5mm magnesia sand, 1-10 percent of graphite, 2-5 percent of anhydrous resin bonding agent and 1-3 percent of additive formed by mixing magnesia powder and zircon sand. The processing method comprises the following steps of: crushing, grinding, compounding, pressing and forming, heating, baking and carrying out waterproof treatment. In the invention, the unfired magnesia-calcium brick with great volume density and high compression strength can be prepared due to reasonable compounding and a scientific treatment process, and particularly, the additive formed by mixing the magnesia powder and the zircon sand is used, therefore, the product has good medium-temperature strength, waterproofness and crack resistance.

The invention provides a water purification system which comprises a concentrated water emission control unit, wherein the concentrated water emission control unit comprises a first branch, a second branch and a wastewater ratio assembly; a water outlet end of the first branch is connected with a water inlet pipeline; the first branch is provided with a first electromagnetic valve; a water outlet end of the second branch is connected with a water outlet section of a concentrated water pipeline or is directly evacuated; the second branch is provided with a second electromagnetic valve; and a water inlet end of the first branch and a water inlet end of the second branch are connected to a concentrated water pipeline between a concentrated water outlet of a reverse osmosis membrane treatment unit and a concentrated water emission electromagnetic valve through the wastewater ratio assembly. The first electromagnetic valve on the first branch and the second electromagnetic valve on the second branch are controlled to open and close intermittently, thereby implementing concentrated water intermittent reflux, reducing the concentrated water emission, and enhancing the recovery rate of the water purification system. The concentrated water reflux is intermittent and controllable, thereby greatly lowering the reverse osmosis membrane pressure and avoiding the shortening of the service life.

The invention discloses an abrasive belt machine. The abrasive belt machine comprises a frame, driving wheels, contact wheels, abrasive belts and servo motors; the driving wheels, the contact wheels, the abrasive belts and the servo motors are symmetrically arranged on the frame; each servo motor is connected with the corresponding driving wheel; each abrasive belt is arranged on the corresponding driving wheel and contact wheel in a sleeving mode; each contact wheel is driven by the corresponding driving wheel to run; each abrasive belt is driven by the corresponding contact wheel to run; one side of each contact wheel is provided with a contact wheel pressure control mechanism; one side of each abrasive belt is provided with an abrasive belt tension control mechanism; one side of the abrasive belt machine is connected with a PLC (Programmable Logic Controller) control box. According to the abrasive belt machine, the double-head double contact wheels can be rapidly replaced or automatically switched for different curved surfaces during use conveniently; the abrasive belt tension control mechanisms are controlled by a precision pressure reducing valve, the tension of the abrasive belts can be automatically adjusted when the resistance is produced so as to enable the tension to be stabilized within a set value, and accordingly the smooth operation of the abrasive belts is ensured and the service life of the abrasive belts is extended; the abrasive belt machine is provided with the contact wheel pressure control mechanisms, the contact wheels are rubber coating wheels, and accordingly the full contact of the complex curved surfaces can be implemented during polishing, the elasticity is achieved, and workpieces are not easy to damage.

The present invention provides one kind of long service life module for aluminum alloy pressure casting die. The material for the module has the components including C 0.37-0.45 wt%, Si 0.90-1.40 wt%, Mn 0.30-0.60 wt%, Cr 5.10-5.70 wt%, V 1.00-1.40 wt%, Mo 1.20-1.50 wt%, S 0.0005-0.003 wt%, P 0.001-0.015 wt%, and Fe and inevitable impurities for the rest. The module is produced through the following steps: homogenizing electroslag ingot in a heating furnace at 1230-1290 deg.c for 15-20 hr, twice upsetting and stretching in the initial forging temperature of 1230-1250 deg.c and final forging temperature of 850-900 deg.c, and structure fining treatment of the hot forging in an annealing furnace at 860-950 deg.c. The module has over 3.5 times longer service life compared with that of available technology.

The invention relates to a linear valve pneumatic actuator testing device. By means of the testing device, no-load tests, load tests, seal tests, strength tests and motion life tests can be carried out on single-action linear valve pneumatic actuators and double-action linear valve pneumatic actuators. Two stable-pressure air storage tanks are used for supply air for the two ends of a pressure cylinder, output torque or a push-pull effort value needed for the tests can be obtained, and therefore valve pneumatic actuators with higher precision can be tested.

The invention relates to an aerospace oxygenerator which comprises a case, a compressor, a distribution valve, a gas cylinder and two molecular sieves, wherein a bottom plate for packaging is arranged at the bottom of the case; a compression system box is arranged on the bottom plate; the compressor is supported in the compression system box; a gas inlet mechanism is arranged at the lower part of the front end face and/or the rear end face of the case, and communicated with the compressor by a gas inlet silencer; the compressor is connected with the two parallel molecular sieves by the distribution valve respectively; the two molecular sieves are connected with the gas cylinder by the distribution valve; the distribution valve is communicated with a gas outlet silencer; the gas outlet silencer is communicated with the compression system box; and the compression system box is communicated with an exhaust mechanism arranged at the lower part of the left side face and/or the right side face of the case. The aerospace oxygenerator is compact in structure, convenient, quick, stable and safe to use, easy to dismount and clean, and noise-free; the use comfort can be ensured effectively; and the service life can be prolonged.

The invention discloses a mobile phone internally provided with a charging device with an A type interface; the mobile phone comprises a mobile phone body and is characterized in that the charging device with the A type USB (Universal Serial Bus) interface is also arranged in the mobile phone body; and the charging device is arranged on a power supply circuit of the mobile phone and is connected with a charging port of the mobile phone by a charging connection line. The charging device is arranged inside a shell of the mobile phone or a groove part of the shell; the USB interface of the charging device is connected with the mobile phone body in a rotation type or telescopic head type or folding type or fixing structure manner; at ordinary times, the USB charging device and the charging connection line are arranged in the mobile phone, thereby being capable of being carried along with the mobile phone and people; as a charging interface can be seen everywhere, when the mobile phone runs out of power or needs to be powered, the mobile phone can be conveniently connected with spigots of matched charging power supplies such as computers and the like to be charged; at ordinary times, the mobile phone can be directly charged through the charging device or the charging device is connected to a mobile phone charger for charging, thereby the problem that outside contact is affected due to power failure of the mobile phone is solved; and the mobile hone is simple in structure and convenient to carry.

A slider, includes a slider base, a pull-tab, a connecting shaft and a spring; the slider base includes an upper blade, a lower blade, and a connecting pin connecting the upper blade and the lower blade; said pull-tab is integrated with the connecting shaft; the pull-tab includes a pull-tab body, with a spring mounting part and a locking part set at the anterior-end-face of the pull-tab body; the anterior-end-face of the pull-tab body is set as a locking vertical plane and the bottom of the pull-tab body is set as cambered surface; the connecting shaft is fixed to the anterior-end of the pull-tab body and the length of the connecting shaft is larger than the width of the anterior-end-face of the pull-tab body; the connecting shaft runs through the spring mounting part and the locking part and extends to both sides of the anterior-end of the pull-tab body.

The invention discloses a double-crystal hard alloy. The double-crystal hard alloy comprises tungsten carbide grains with particle sizes ranging from 1.6 micrometers to 2.0 micrometers and from 5 micrometers to 10 micrometers. The tungsten carbide grains comprise, by weight, 60-80% of the tungsten carbide grains with particle sizes ranging from 1.6 micrometers to 2.0 micrometers and the balance ofthe tungsten carbide grains with particle sizes ranging from 5 micrometers to 10 micrometers. The preparation method of the double-crystal hard alloy comprises the following steps of S1, grinding first tungsten carbide powder with the particle sizes ranging from 10 micrometers to 20 micrometers to obtain a first material; S2, mixing the first material, second tungsten carbide powder with the particle sizes ranging from 3 micrometers to 7 micrometers and cobalt powder for grinding treatment to obtain a mixture; and S3, granulating, pressing and sintering the mixture to obtain the double-crystal hard alloy. The double-crystal hard alloy can meet use requirements of machining, mold manufacturing and the like, and solves the contradiction problems that the high fracture toughness and the highhardness of a coarse grain WC-Co hard alloy are difficult to exist at the same time.

The invention discloses an anti-slide single-rubber-barrel downhole throttling device which is designed for achieving the purposes of improving sealing performance of a throttling device, prolonging the service life of the throttling device, stabilizing the throttling device and preventing the throttling device from sliding. The anti-slide single-rubber-barrel downhole throttling device mainly comprises a locking sleeve connecting a putting device and a body, a fishing head arranged on the body in a sleeved mode, a slips, a slips supporting sleeve, a down seal plunger barrel arranged under the locking sleeve, a slips supporting sleeve arranged on a middle supporting sleeve in a sleeved mode, a rubber barrel supporting sleeve, a rubber barrel, a cylinder sleeve, an air cock arranged at the bottom end of the down seal plunger barrel, an air cock base arranged at the bottom end of the base seal plunger barrel, a sand preventing hood connecting the cylinder sleeve and an outer supporting sleeve, anti-slide claws connected with a connection sleeve, and the like. When the anti-slide single-rubber-barrel downhole throttling device is mounted, the device is easy to seal in a down seal mode, after mounting, the rubber barrel and an oil pipe are good in sealing performance, service life is stable, in fishing, a fishing pin is sheared, the body and the slips supporting sleeve move upwards and are separated from the rubber barrel, and the rubber barrel can effectively contract, so that fishing is easy. The anti-slide claws can well prevent the device from sliding, and the device is prevented from sliding down into a well bottom. The anti-slide single-rubber-barrel downhole throttling device is good in sealing performance and stable in service life.

The invention belongs to the technical field of steel ladle inner lining castable construction equipment, and specifically discloses a steel ladle moulding bed for steel ladle inner lining integral casting. The steel ladle moulding bed is pivotally characterized in that the steel ladle moulding bed is fixed by a hydraulic oil cylinder, wherein an internal type vibrating motor is used to vibrate and form during castable construction; and a ventilating pipeline for de-moulding is arranged on the bottom of the steel ladle moulding bed, so that the de-moulding purpose is achieved by lifting the steel ladle moulding bed through compressed air at a castable initial setting stage after casting construction is completed.

The invention discloses a magnetron sputtering method for plating silver on the surface of copper contact, wherein the method comprises the steps: carrying out mechanical polishing, cleaning and drying of a copper contact substrate material; putting into a vacuum chamber, carrying out ion cleaning, and directly depositing a silver film on the surface of the copper contact substrate by a magnetronsputtering principle; and finally, carrying out annealing treatment. The silver film obtained by the method has the advantages of good binding with the substrate, uniform thickness of a film layer, nano-scale grain size, fast deposition rate, low surface roughness and good contact resistance, improves ablation resistance and prolongs the service life. Compared with a traditional electroplating method, the method has the advantages of fewer working procedures, high efficiency, green environmental protection, good binding force of a plating layer, simple equipment, convenient operation, and goodindustrial application prospect.

The invention relates to a continuous casting tundish stopper rod, in particular to design of a slag line part composition of the tundish stopper rod, which mainly solves the problem of slag corrosion cracking of a slag line part of the stopper rod. The continuous casting tundish stopper rod adopts a technical proposal that the continuous casting tundish stopper rod with long service life comprises a stopper rod body and a stopper rod slag line. The continuous casting tundish stopper rod is characterized in that the slag line part adopts refractory materials which comprise the following compositions in percentage by weight: 8 to 15 percent of SiO2, 0.5 to 1 percent of Al2O3, 0.1 to 0.5 percent of Fe2O3, 1 to 3 percent of CaO, 0.1 to 0.3 percent of MgO, 60.8 to 64.0 percent of ZrO2 and 20 to 27 percent of graphite. The continuous casting tundish stopper rod is mainly used for improving the reliability and the service life of steel teeming equipment.

The invention discloses a novel rubber seal ring for an explosion-proof motor, and belongs to the technical field of sealing rings. The rubber seal ring is characterized by comprising the following raw materials in parts by weight: 45-55 parts of neoprene, 10-20 parts of EPDM rubber, 4-6 parts of sulfidation system, 5-10 parts of a coldproof soften flux, 12-18 parts of a reinforcing agent, 5-10 parts of a coldproof assistant, and 2-5 parts of an ozone proof assistant. The rubber seal ring has the advantages that the rubber seal ring is high in ozone resistance, good in low temperature resistant performance, and reliable in sealing; the abrasion resistant capability is reinforced greatly; the product quality is more stable; the service life is prolonged by 200% to rubber seal rings for explosion-proof motors in the prior art.

The invention discloses rotating axis parameter measurement equipment and a rotating axis multi-parameter sensor. The equipment comprises a stator, a rotor, the rotating axis multi-parameter sensor, apower supply circuit and a photoelectric coupling receiver, wherein the power supply circuit and the rotating axis multi-parameter sensor are fixedly arranged on the rotor and are connected with eachother; the photoelectric coupling receiver is fixedly arranged on the stator; and the rotating axis multi-parameter sensor comprises a digital measurement circuit and a photoelectric coupling transmitter. The rotating axis parameter measurement equipment can measure digital signals of each rotor parameter through the digital measurement circuit and transmit the digital signals through a photoelectric coupler at the same time, thereby realizing multi-parameter measurement and transmission and ensuring strong anti-interference capability and stable signal measurement and transmission; meanwhile, the measurement equipment has compact structure, small volume and light weight, is suitable for the parameter measurement of various rotating axes, and has longer service life.

The invention discloses a calendering grass green rubber foxing adhesive for wear-resistant liberation shoes. The adhesive is prepared from the following components in parts by weight: 85-90 parts of standard rubber, 10-15 parts of butadiene-styrene rubber, 15 parts of high styrene, 2.0-2.4 parts of sulfur, 3.6-4.0 parts of a vulcanization accelerator, 1.8-2.2 parts of stearic acid, 1.8-2.2 parts of activated zinc oxide, 6-8 parts of pine tar, 75-85 parts of argil, 2.0-2.4 parts of an anti-aging agent, 4-8 parts of composite resin DS-B, 8-10 parts of calcium grease, 30-36 parts of light calcium carbonate and 4-6 parts of grass green masterbatch.

The invention discloses a cement coagulant and a preparation method thereof. The cement coagulant comprises the following components in percentage by mass: 20-30 percent of aluminum sulfate hydrate, 1-5 percent of triethanolamine, 5-10 percent of glycol and the balance of water in terms of 100 percent in total. The cement coagulant is low in alkalinity, no chloride ion etching, strong anti-permeability and stable durability, is beneficial to prolonging the service life of a concrete member and ensuring the engineering quality and has a remarkable coagulating and reinforcing effect on cement doped with mineral slag, phosphorus slag and steel slag.