636results about How to "Uniform temperature field" patented technology

The invention discloses a fast manufacturing method of three-beam laser compound scanning. The method comprises the following steps of: firstly utilizing long-wavelength laser (CO2 laser) for preheating the metal powder, then utilizing short-wavelength laser (YAG or optical fiber laser) for fusing the metal powder and finally utilizing long-wavelength laser (CO2 laser) to carry out heat treatment to the frozen metal. The fast manufacturing method uses the three beams of laser to carry out compound scanning, namely uses long-wavelength laser to preheat, short-wavelength laser to fuse and then long-wavelength laser to carry out heat treatment, can realize the compound process of preheating, fusion and heat treatment of the metal powder. The three beams of laser compound scanning mode can reduce internal stress of the metal part, avoid warping and cracking, improve organization and improve performance.

The invention relates to a sludge drying and incineration combined treatment method with good treatment effect, wide sludge adaptability, and safe and stability system. To avoid agglomeration of mechanically dewatered sludge (k) in a fluidized bed dryer (6), a part of dried sludge (c) is premixed with the mechanically dewatered sludge (k) and then fed into the fluidized bed dryer (6). The dried sludge (c) is incinerated into a circulating fluidized bed incinerator (1) to generate superheated vapor. The superheated vapor is condensed to hot water in a heat exchange tube (6-2) of the fluidized bed dryer (6) and then recycled to the circulating fluidized bed incinerator (1). The arrangement of buried pipes (1-3) and fractional air supply inside the circulating fluidized bed incinerator (1) can effectively control the lower temperature of the circulating fluidized bed incinerator (1) to prevent deflagration of dried sludge. The entire system has no emission of pollutants such as unpleasant odor, acidic gases, heavy metals and dioxin; is safe and reliable; and can operate for a long time.

The invention, belonging to the technical field of crystallized film growth, particularly provides a pallet device for bearing processed substrates. The ballet device comprises a plurality of pallets arranged laminatedly along with a length wise direction, and certain space exists between adjacent pallets. In addition, the invention further provides a crystallized film growth device, comprising a process cavity, a process gas conveying system and an exhaust system, wherein the process cavity is provided with the pallet device for bearing the substrates in the process. The pallet device and the crystallized film growth device having the pallet device can increase the number of the substrates processed by the process at every time with low cost and increase the productivity.

The invention discloses a method for microwave sintering of porous ceramsites by adopting medical waste incineration fly ash. The method comprises the following steps: (1) fully mixing the medical waste incineration fly ash with an auxiliary material, adding a small amount of water into the mixture, and carrying out granulation molding by a molding machine; (2) carrying out granulation molding, drying to obtain a particle raw material, filling the periphery of the particle raw material with a microwave coupling agent powder; and (3) carrying out microwave sintering of the particle raw material filled with the powder, and after sintering, cooling to the room temperature to obtain the porous ceramsites. The method can utilize a 'hot spot' effect of fly ash high-content active carbon in a microwave field to instantly completely decompose dioxins in the fly ash, at the same time, allows most heavy metals to be wrapped and cured in grids of the sintered product, and rapidly sinters the fly ash into the porous ceramsites; and the ceramsites can be used for building aggregates or wastewater filter materials, achieves further resource utilization while achieving harmlessness treatment of the medical waste incineration fly ash, and achieves many things at one stroke.

The invention relates to a stainless heat-resistant alloy steel seamless steel tube and a preparation method thereof. The seamless steel tube comprises the following chemical compositions by weight percent: 0.04-0.10% of C, 0.75% or less of Si, 2.00% or less of Mn, 0.03% or less of P, 0.03% or less of S, 17.00-23.00% of Ni, 24.00-26.00% of Cr, 0.20-0.60% of Nb+Ta, 0.15-0.35% of N and the balance Fe and inevitable trace elements. The preparation method of the invention adopts hot extrusion and cold rolling, computer automatic control solution heat treatment and other advanced technologies. Theproduct of the invention has excellent mechanical performance, high temperature resistant and corrosion resistance and various technical indexes of the product all meet or exceed Chinese relevant technical standards, thus successfully providing a new kind of qualified tube for the ultra supercritical power station boiler.

The invention discloses a micro-reactor suitable for micro-liquid mixing and biochemical reaction and a manufacturing method thereof. The micro-reactor comprises an upper cover plate and a lower base plate which is butted with the upper cover plate. A piezoelectric film is arranged between the lower base plate and the upper cover plate. The piezoelectric film is provided with a micro channel, an outlet and an inlet of which are respectively corresponding to a liquid outlet and a liquid inlet of the upper cover plate. A surface acoustic wave generator is also arranged between the lower base plate and the piezoelectric film. According to the invention, a temperature control system is integrated into the micro-reactor such that a reaction in the micro-reactor can be conducted under the condition of constant temperature. By the mechanism of surface acoustic wave, mechanical vibration can be generated to drive non-charged liquids to be mixed, and an alternating electric field also will be generated on an energy transducer. Thus, the micro-reactor is endowed with a liquid vibration function by surface acoustic wave, a liquid driving function by the alternating electric field and a microenvironment temperature control function, and efficiency of a micro-liquid chemiluminiscence reaction can be raised greatly. Therefore, the structure also has a wider application range, and will have a more obvious effect of driving charged liquids.

The invention relates to a preparation method of a low heat expansion carbon fiber reinforced resin matrix composite material mold, belonging to the technical field of composite material preparation. The method is capable of forming a molding surface with a VARI (Vacuum Assisted Resin Infusion) technique, and ensuring low heat expansion performance of the mold by controlling the carbon fiber laying direction, precuring temperature, postcuring manner and postprocessing manner of the molding surface. With the adoption of the VARI technique, when a vacuum pressure reaches to 0.1MPa, carbon fiber cloth is compressed by vacuum, so that the product is internally dense after resin is guided in the product, and the volume content of composite material fibers is ensured; and meanwhile, bubbles between carbon fiber cloth layers are removed so as to ensure that the content of internal pores of the composite material is as few as possible and ensure the strength of the composite material.

The invention discloses a temperature controllable subzero cooling system based on self-pressure cryogenic fluid delivery technique. The system comprises a liquid nitrogen storage tank, a liquid delivery pipe, a liquid injection pipe, a vaporizer, a self-pressure loop, an air delivery pipe, a self-pressure adjusting valve, a liquid injection valve, a safety valve, a manual pressure relief valve, a liquid delivery valve, an air delivery valve, a pressure sensor P1, a three-way pipe, a pressure sensor P2, a data collector, a computer, a subzero cooling treatment chamber top cover, a liquid level meter, an exhaust pipe, a thermometer, a subzero cooling treatment chamber cabinet, a workpiece to be treated, a rack, a supporting structure, a travelling wheel, a perforated baffle, a cooling medium delivery pipe and a subzero cooling treatment chamber. The invention has the advantages of self-pressure cryogenic cooling medium delivery, no need of extra driving source, liquid and air two subzero cooling processes, convenient temperature dropping rate and treatment temperature adjustment and uniform temperature field in the subzero cooling treatment chamber.

The present invention discloses an ice-temperature vault. The aim of the invention is to provide an ice-temperature vault which has the advantages of high-precision control, uniform wind speed field in the vault, uniform temperature field in the vault, and satisfaction to the requirement of ice-temperature storage. The vault body comprises a base layer heat insulation layer, an outer heat insulation vault body and an inner non-heat-insulation vault body which are connected with the base layer heat insulation layer. An air interlayer is provided between the inner non-heat-insulation vault body and the outer heat insulation vault body. A plurality of air coolers which are connected in parallel for alternately operating or defrosting are installed in the air interlayer at the top part of outer vault body. A top air supply aperture plate is provided in the inner vault body. A static pressure box layer is formed between the top air supply aperture plate and the inner non-heat-insulation vault body. The periphery at the base part of inner non-heat-insulation vault body is provided with a plurality of return air grilles. A temperature sensor is respectively installed at the lower part of static pressure box layer and at the return air grilles. The temperature in the ice-temperature vault is stable. The speed field and temperature field are extraordinarily uniform. The defrosting does not affect the temperature in the vault. The ice-temperature vault has high control precision. The temperature fluctuation of hollow vault does not exceed +/- 0.3 DEG C.

The invention provides a wax mold combination of a four-connection hollow turbine guide vane, which has high product quality and can completely solve the problems that a rotary connection R part of an edge plate and a vane body is hotly cracked and loosened, and a precision casting method of the wax mold combination. The wax mold combination comprises a sprue cup and a straight pouring gate which is communicated with an outlet end of the sprue cup, wherein inner sprue assemblies are arranged on the side wall of the straight pouring gate; each inner sprue assembly comprises a lower edge inner sprue communicated with one side of a vane lower edge plate cavity, and an upper edge inner sprue communicated with one side of a vane upper edge plate cavity; and each lower edge inner sprue and each upper edge inner sprue are sequentially arranged along the flow direction of the straight pouring gate. The precision casting method comprises the following steps: (1) manufacturing the wax mold combination; (2) carrying out shell making on the wax mold combination prepared in the step (1) to obtain a four-connection hollow turbine guide vane shell; and (3) covering one layer of ceramic heat-preservation cotton on a shell vane body part and covering two layers of ceramic cotton on the whole shell; and putting the treated shell into a roasting furnace for carrying out casting.

The invention discloses a resistance soldering method using a graphite electrode and a resistance soldering device. According to the resistance soldering method, the graphite electrode serves as a resistance soldering heating element which is used for soldering a hard alloy workpiece; the hard alloy soldered workpiece is placed in a closed steel soldering chamber; and when the graphite electrode is electrified and heated, carbon in the graphite electrode and oxygen surrounding the hard alloy soldering workpiece react chemically, so that oxygen in a local area at a soldering connection position is consumed. Oxygen-free porosity of a soldering connection brazing seam region between hard alloy and a steel substrate or between one piece of hard alloy and another piece of hard alloy can be realized, temperature fields of soldering connection portions are uniform, heating time is short, and efficiency is high. A graphite protecting device sleeves the graphite electrode and protects the graphite electrode from being damaged during resistance soldering pressurization. A pressure controller is arranged on the graphite electrode, pressure on the different soldering connection portions is not increased after the pressure of the graphite electrode reaches to a certain degree, and different demands of different soldering workpieces on external pressure are met.

The invention provides a composite energy field heating method. The composite energy field heating method comprises the steps that a microwave heating device is used for carrying out fixed-point heating or directional heating on a wave absorbing material, and an autoclave is used for overall heating the wave absorbing material. The method is completed through a composite energy field heating device. The composite energy field heating device comprises the microwave heating device and the autoclave. The microwave heating device comprises a microwave generator, a microwave cavity and a microwave local shielding part. The microwave generator sends microwaves into the microwave cavity. The interior of the microwave cavity is used for containing the wave absorbing material. The microwave local shielding part is located in the microwave cavity and used for covering the outer surface of the wave absorbing material, and is composed of a microwave shielding area and a microwave transmitting area. The microwave transmitting area comprises one or more clearances so that the microwaves in the microwave cavity can enter the wave absorbing material through the clearances to be absorbed by the wave absorbing material. The composite energy field heating method can really achieve temperature consistency of all the portions in the wave absorbing material, and a high-quality cured product can be provided for the field of aerospace.

The invention relates to a rare-earth electrode slurry of rare-earth circuit, based on the metal base board and a relative production, wherein it is characterized in that: said slurry is formed by solid material and organic solvent carrier, while their mass ratio is 70-90:30-10; the solid component comprises: silver, palladium, and yttrium composite power and micro-crystal glass powder, while their mass percentage is 99.4-94:0.6-6; said composite power is formed by silver, palladium, and yttrium powders at the ratio as 0.6-10:99-82:0.4-8; said micro-crystal glass is the one in SiO2-Al2O3-CaO-B2O3-Bi2O3-La2O3 group. And the production comprises: (1), preparing rare-earth micro-crystal glass powder; (2), preparing silver, palladium, and yttrium composite powder; (3), preparing organic solvent carrier; (4), mixing material in three-dimension and rolling with three rollers; (5), preparing the rare-earth slurry; (6), bottling. The invention is environment friendly and better humidity compatibility.

The invention discloses an electric heating element of a rare earth thick film circuit based on an IR-LED (Infrared Light Emitting Diode) ceramic substrate and a preparation method thereof. The electric heating element is characterized by comprising a quartz ceramic substrate and serial rare earth electronic slurry. The serial rare earth electronic slurry is prepared on the quartz ceramic substrate in a form of a thick film circuit; and the thick film circuit is provided with an electrode connecting end for externally connecting with a power source. The invention has the advantages that the directly-heating type functional ceramic substrate is high in far infrared radiation efficiency, adjustable in wavelength range, uniform in temperature field, strong in thermal shock resistance, environment-friendly, efficient and energy-saving, safe and reliable as well as wide in application range.

The invention discloses a novel rapid molding device and a powder feeding and spreading method thereof. The novel rapid molding device comprises a powder feeding cylinder, a molding cylinder, an overflow powder cylinder, a laser window, a powder feeding scraper plate and a bucket type double-scraper plate powder spreading mechanism, and also comprises a powder feeding cylinder heat preservation chamber, a powder feeding cylinder heater, a molding cylinder heat preservation chamber, a molding cylinder heater and a powder feeding cylinder working panel, the powder feeding scraper plate linearlymoves from the left to the right and pushes powder extruded through the lifting of the piston of the powder feeding cylinder to a powder falling opening at the right end of the powder feeding cylinderheat preservation chamber, the powder freely falls into two bucket scraper plates from top to bottom, and the bucket scraper plates horizontally move from the left to the right to push the powder tothe molding cylinder, spread the powder on the molding cylinder and send superfluous powder outside the two bucket scraper plates into the overflow powder cylinder in order to complete one-time powderspreading. The novel rapid molding device and the powder feeding and spreading method thereof have the advantages of effective improvement of the powder feeding and spreading manner, improvement of the powder spreading quality, reduction of material wastes, and improvement of the 3D printing quality and the printing efficiency.

The invention discloses a moulding press for chalcogenide glass components and belongs to the technical field of glass mould pressing and hot-forming. The moulding press is mainly used for solving the problem that the existing open-structured optical glass moulding press has devitrification, oxidation and forming defects. The moulding press is mainly characterized by comprising a pressing system, a mould system, a temperature control system, a heating system, a workbench, a press body and an atmosphere control system, wherein the press body is of a sealing structure; the atmosphere control system consists of two parts, namely an air extraction system and an inflation system; the workbench is arranged at the bottom of the inside of the press body, and the workbench is provided with a support plate through a semicircular guide rail; the heating system comprises a heating plate and an annular heating element, the heating plate is arranged in the middle of the support plate, and the annular heating element is arranged around the heating plate; and the pressing system is composed of a pneumatic pump, an air cylinder, a flange, and a replaceable press head. The moulding press disclosed by the invention has the characteristics that chalcogenide glass is internally heated uniformly in the process of secondary mould pressing, the oxidation is avoided, the material utilization rate is improved and the production efficiency is improved, and is mainly applied to secondary mould pressing devices for chalcogenide glass components.

The invention relates to a daily used vacuum cup, in particular to a compound-phase variable-speed cooling constant-temperature cup. The solid-liquid compound-phase variable-speed cooling constant-temperature cup comprises a cup lid and a cup body, wherein the cup lid is in sealed connection with the cup body, the cup body comprises an inner cup wall, a middle cup wall and an outer cup wall, the internal cavity of the inner cup wall forms a beverage containing cavity, the airtight cavity between the inner cup wall and the middle cup wall is filled with inorganic hydrous salt compound phase change liquid, the airtight cavity between the bottom of the inner cup wall and the bottom of the middle cup wall is designed into a phase change alloy rapid-cooling interlayer, and the phase change alloy rapid-cooling interlayer is provided with built-in low-melting-point phase change alloy. In a solid-liquid compound-phase variable-speed cooling microwave heating constant-temperature cup, the airtight cavity between the inner cup wall and the middle cup wall is filled with inorganic hydrous salt compound phase change liquid to form a phase change liquid heating cavity, one or more distributed rod-like microwave antennae are arranged in the phase change liquid heating cavity, and a solid-state microwave power source, a power supply part and a control system are arranged in a cup base.