34results about How to "Small heating range" patented technology

The invention relates to a cold crucible induction smelting method with ultra-high smelting temperature. Auxiliary energy device; (3) Set a branch cooling waterway at the bottom of the water-cooled copper crucible. The branch cooling waterway is to make a radial branch hole extending to the center of the bottom at the bottom of the crucible, and make the outer end of the radial branch hole and the crucible The cooling holes in the petals are connected to the main hole; (4) The water-cooled copper crucible is made into a shape with a hole in the bottom, and it is blocked by a separate water-cooled red copper crucible with a water supply jacket and a return water jacket at the bottom The bottom hole of the crucible and the upper part of the crucible plug are in the shape of petals. Its advantages are: the melting temperature of the induction cold crucible technology is increased to higher than 2000°C, even higher than 3000°C, and the application field of the induction cold crucible technology is extended to almost all refractory metals and high melting point precious metals.

The invention discloses a method for producing ammonium polyphosphate by using a stepwise reaction and polymerization, relates to a method for producing ammonium polyphosphateproducts with different polymerization degrees in the same set of device, in particular to a production method of ammonium polyphosphate with high purity, high polymerization degree and the average polymerization degree larger than 1000. The method comprises the following steps in sequence: a. adding a polycondensation agent into polyphosphoric acid as a raw material in the weight ratio of 1:1 and mixing evenly; b. adding the material obtained by the step a into a continuous synthetic reactor for reacting; and c. further polymerizing products obtained in the step b for 30-300 minutes at the pressure of 0.00MPa-0.6MPa and the temperature of 120DEG C-500DEG C to obtain the high-purity ammonium polyphosphate products with the polymerization degree of 10-1,800. The invention has the advantages of convenient production and control, high yield, low energy consumption and benefit for large-scale continuous industrial production.

The invention discloses a brazing method for a cable shielding layer and a shell, wherein wire branching holes are formed in two ends of the shell; a cable passes through the wire branching holes; and the brazing method comprises the following steps of: winding, namely winding brazing wires on parts, opposite to the wire branching holes, of the cable shielding layer; fixing, namely fixing the cable, the shell and the brazing wires by a clamp; heating, namely, putting a brazing part into an induction coil and heating the brazing part by induction heating equipment; and cooling, namely stopping heating until the brazing part is cooled. By the brazing method, one-time molding of joints at two ends of the shell can be realized, the shape of the shell is uniform and stable, the brazing quality is easy to guarantee, and efficient and automatic production requirements can be met.

The invention discloses a rotary-disc flame welding machine and a welding method thereof. The rotary-disc flame welding machine comprises a machine body, wherein a rotary disc, an electric control box, a gas control box, a wire feeding mechanism and a welding heating gun are arranged on the top surface of the machine body; the wire feeding mechanism and the welding heating gun are both connected with a first cylinder through a first piston rod separately; a ratchet wheel is connected to the rotary disc through a rotary shaft; a second cylinder is horizontally arranged at one side of the ratchet wheel; the second cylinder is connected with a pawl through a second piston rod; a wire storage mechanism is arranged in the machine body; and a charge mechanism and a discharge mechanism are arranged on the side surface of the machine body. The welding method thereof comprises the following steps: clamping location for the charge mechanism, clamping location for the discharge mechanism, location for the wire feeding mechanism and the welding heating gun, and the trial running of the flame welding machine. The welding method disclosed by the invention is beneficial to realizing the automatic machining and production of the flame welding machine, thereby improving the welding accuracy; and temperature interference among welding points is eliminated, and the small heating range and obvious gradient temperature phenomenon of a traditional fixed welding gun is eliminated with regard to products with complex structures and large sizes.

The invention discloses a method for sealing a shielding can, comprising the following steps: providing a shielding can riveted with a connector, wherein an assembling gap is formed between the shielding can and the connector; providing an stannum ring with the shape corresponding to that of the gap; sheathing the stannum ring on the connector to cover the gap between the shielding can and the connector; providing a radio frequency heater connected with an inductance coil; preparing the inductance coil into a shape corresponding to that of the stannum ring; and sheathing the connector in the inductance coil, positioning the stannum ring below the inductance coil, and leading the stannum ring to lean a certain angle relative to the inductance coil, thus the strength of magnetic fields generated by the inductance coil at a region at which the stannum ring is positioned to be almost same. The radio frequency heater electrifies the inductance coil to generate a magnetic field; and the inductance coil is heated and molten in the magnetic field to fill the gap. The method for sealing the shielding can of the invention has good sealing effect and higher qualification rate and production efficiency.

The invention discloses a plasma display panel (PDP) terminal hot-pressing head structure, which relates to the PDP terminal hot-pressing head structure realizing hot-pressing pressure and temperature control by distributing a plurality of pressing heads. The PDP terminal hot-pressing head structure provided by the invention aims to overcome the shortcomings of the prior art, and can effectively solve the problem of pressing head pressure and heating distribution and improve pressing head regulation processibility and pressing head maintenance operability. To fulfill the aims, the technical scheme adopted by the invention is that: the PDP terminal hot-pressing head structure comprises a base and the pressing heads; a bottom plate is detachably connected to the base by a connecting device;the PDP terminal hot-pressing head structure further comprises the plurality of pressing heads; the rear ends of each pressing head are connected with a pressure device; and the pressure devices control the actions of the pressing heads, can output constant pressure according to a set value, and are fixed on the bottom plate. The PDP terminal hot-pressing head structure is applied to tape carrierpackage (TCP) hot-pressing.

The present invention relates to a fixing device, in particular to a fixing device that adopts a heating method of electromagnetic induction and an image forming device. The fixing device 20, which is used for fixing an toner image T on a recording medium P, is provided with a magnetic flux generation means 24 that is used for generating the magnetic flux, heating components 22 and 23 that are heated by induction of the magnetic flux, a magnetic flux adjusting component 29 in the width direction, the set adjustment range of which lowers the magnetic flux that affects the heating components 22 and 23; the adjusting component 29 can be driven to adjust a changeable means of changeable adjustment range. During the period of continuous fixation of the toner image T by a plurality of recording media P, the changeable means controls and drives the adjusting component 29. The present invention also provides a fixing device and an image forming device, which can reliably inhibit the temperature of the heating components or the two ends in the width direction of the fixing component, even on the occasions of continuous fixation of a plurality of recording media.

The invention discloses a repairing process of a chromium-molybdenum steel tube bundle and a tube plate, and belongs to the field of repairing of chromium-molybdenum steel. The process comprises a tube bundle repairing process and a tube plate repairing process. A leaking point is determined firstly, then the tube bundle and/or the tube plate are repaired according to the steps of preheating of adjacent tube openings, welding and post-welding treatment of the adjacent tube openings. The adjacent tube openings are pre-heated and subjected heat post-welding treatment through an oxygen-acetylene inner flame, a nickel base welding wire serves as welding materials, the heating and temperature control conditions on the repairing site can easily meet the requirements of the repairing process, an obtained welding joint is high in quality and not prone to new cracks, the tube openings replace crack-stopping holes in the tube plate repairing process, cracks are not prone to spread, and the welding cost and labor intensity are effectively reduced.

The invention discloses a tundish electromagnetic fixed point target area heating structure, and solves the problems of short water port life, unreasonable molten steel heating area, high operation cost and easy generation of such accidents as breaking out and steel overflowing in terms of traditional tundish electromagnetic heating. The tundish electromagnetic fixed point target area heating structure comprises a tundish bottom consisting of a working layer, a permanent layer and a tundish baseplate, and a water port formed in the tundish bottom, wherein annular moving base bricks positioned above the tundish baseplate are arranged at the periphery of the water port; an annular electromagnetic inductive heating device is embedded in the lower section of the moving base bricks; and inner shielding rings are annularly arranged in the electromagnetic inductive heating device. The tundish electromagnetic fixed point target area heating structure is simpler in structure, excellent in controllability and uniform in molten steel heating, convenient to install and maintain, effectively realizes the constant-temperature casting of low superheating degree, is high in safety and reliability, and effectively prevents the damage of the water port.

The invention discloses a heating device for making a bending fire curve. The heating device comprises a base (10), a rotating shaft (20), at least two cantilever rods (30) and a guide plate (50); therotating shaft (20) is fixedly connected to the base (10); the at least two cantilever rods (30) are hinged in sequence and comprise a first connecting end (31) and a second connecting end (32), thefirst connecting end (31) and the second connecting end (32) are arranged end to end, the first connecting end (31) is connected with the rotating shaft (20) in a pivoted mode, and the second connecting end (32) is provided with a fire curve heating head (40); and one end of the guide plate (50) is connected with the rotating shaft (20), the other end of the guide plate (50) is opposite to the second connecting end (32), the guide plate (50) is provided with a guide end face (51), and the second connecting end (32) is suitable for moving along the guide end face (51). The heating device is small in heating range, low in heat energy loss, accurate in fire curve displacement during bending, simple in structure, high in reliability and convenient to operate, and the production efficiency is greatly improved.

The invention provides a drying device for producing flexible fabric, and belongs to the technical field of machinery. A drying device for producing a flexible fabric comprises a water squeezing assembly used for squeezing out water on the upper surface and the lower surface of a lamp box fabric and draining the water out of two sides of the water squeezing assembly; a water absorption assembly which is used for carrying out water absorption treatment on the upper surface of the lamp box fabric; and a drying assembly which is used for drying the water on the upper surface and the lower surface of the lamp box fabric, wherein the water squeezing assembly, the water absorption assembly and the drying assembly are sequentially arranged. The device has the advantage of being good in water removal effect.

The invention relates to a plasma heating furnace for melting shrinkage of an optical fiber preform. The plasma heating furnace comprises a furnace body and a plurality of cathodes, the furnace body forms an anode, the furnace body is provided with a fusion shrinkage channel through which the optical fiber preform passes, a plurality of mounting cavities are formed in the furnace body, and the mounting cavities are communicated with the fusion shrinkage channel through plasma jet orifices; and the cathodes are arranged on the mounting cavities, working gas channels are formed between the cathodes and the mounting cavities, cathode heads of the cathodes face the plasma jet orifices, and insulating rings are arranged between the cathodes and the inner walls of the corresponding mounting cavities. The plasma heating furnace is provided with a melting shrinkage channel for the optical fiber preform to pass through, and working gas is introduced into the working gas channels to generate plasmas. A graphite piece is omitted in the furnace body, so that the situation that dust is generated through oxidation does not exist, no dust is attached to the optical fiber preform, and the quality of the optical fiber preform cannot be affected. The heating interval of the plasma flame generated by the plasma heating furnace is small, and compared with the related technical scheme, the energy is more concentrated and more energy-saving, and the efficiency is higher.