13results about How to "Reduce thermal shock" patented technology

The invention relates to the field of material surface treatment and machining, in particular to a method and device for directly preparing a copper alloy coating on the surface of a titanium alloy sealing rod. The process comprises the steps that firstly, cleaning and metal powder drying treatment are conducted on a sealing rod base material, and the base material is clamped on a rotary bearing mechanism in an adjusting box body; sealing the adjusting box body and filling inert gas to replace air until the oxygen content reaches the standard; the laser cladding mechanism is controlled to conduct scanning preheating on the surface of the base material in a non-powder-feeding state; then a powder feeding function is started, spiral high-speed laser cladding is carried out in cooperation with rotation of the base material and axial feeding of the cladding assembly, and closed-loop adjustment of the protective gas flow is carried out in the cladding process; and after cladding is completed, the base material is transferred into the heating furnace body in the box body to be subjected to post-treatment slow cooling, laser scanning preheating and in-furnace slow cooling are combined, atmosphere closed-loop control in a closed environment is matched, and the effect of restraining cracking and oxidation of a titanium alloy cladding layer is achieved.

The utility model relates to a pyrolysis activation all -in -one of resin resourceful regeneration, including pyrolysis activation jar, feed pipe, flue gas pipeline and preheating utilization mechanism, the pyrolysis activation jar side intercommunication has flue gas pipeline, is equipped with the feed pipe at the top, preheating utilization mechanism installs at the feed pipe surface, and with flue gas pipeline exhaust end intercommunication, hot gas in pyrolysis activation jar passes through flue gas pipeline and enters into rotary pipeline inside, and the inside rotary pipeline is equipped with heat conduction sleeve, and heat conduction sleeve surface is opened with the spiral groove of rotary pipeline adaptation, and the contact area of rotary pipeline and heat conduction sleeve increases, better heat absorption of rotary pipeline is absorbed to heat conduction sleeve surface, and is given to feed pipe, and the resin passes through the feed frame of external equipment and enters the feed pipe, wherein the external equipment is equipped with control valve, and the resin in feed pipe is preheated and handled, and the feed pipe surface is equipped with the heat preservation frame, can lock the heat, reduces the loss of heat.

The utility model discloses a temperature control device for a high-temperature pump, the temperature control device for the high-temperature pump is arranged between a pump body of the high-temperature pump and a motor, the temperature control device comprises a device main body, an axial spiral flow channel and a labyrinth flow channel, the upper end of the device main body is connected with a shell of the pump body, and the lower end of the device main body is connected with a shell of the motor; the axial spiral flow channel is arranged so that circulating heat dissipation can be achieved through flowing of a high-temperature working medium; and the labyrinth runner is used for prolonging a cooling path and increasing a turbulence effect so as to improve the heat exchange efficiency.

The invention discloses a high-temperature-resistant metal casting demolding coating and a preparation method thereof, and belongs to the technical field of coatings. The components of the coating are optimized, the composite binder formed by compounding the organic binder and the inorganic binder is adopted, and the high-temperature-resistant auxiliary agent composed of the zirconite powder, the corundum powder and the nano cerium oxide is combined, so that the temperature tolerance of the coating is remarkably improved, and the service life of the coating is remarkably prolonged; the added hexagonal boron nitride can form a compact and smooth coating surface, the adhesion between a metal melt and a mold can be effectively reduced by combining the high-temperature-resistant auxiliary agents of different grades and utilizing the filling-supporting-lubricating synergistic effect and synergistic effect of particles of different sizes, and efficient and stable demolding performance is achieved; and the nano aluminum oxide can form chemical bonding with hexagonal boron nitride and the composite binder, so that the interface bonding force is further enhanced, the coating is prevented from being layered and peeled off under high-temperature impact, the thermal impact of molten metal on the mold is effectively buffered, and the service life of the mold is prolonged.

This invention discloses a method for drying raw materials using waste heat from a sintering brick kiln, relating to the field of sintering brick raw material drying technology. The invention first constructs a material pre-drying platform on the top surface of the tail section of the sintering brick kiln, places the material on the pre-drying platform, and opens a connecting opening at the top of the tail section near the brick outlet. The dryer is then mounted above the connecting opening, and an insulation structure is installed outside the drying equipment. This invention utilizes the waste heat of the kiln to pre-dry the raw materials, removing most of the moisture, before they enter the dryer for further drying. The waste heat from the kiln tail section is discharged through the connecting opening, acting on the dryer cylinder, and then conducted to the material inside the dryer. This isolates the kiln flue gas from contact with the material, preventing impact on the material's properties and sulfur content. The insulation structure also prevents flue gas escape and facilitates temperature control during drying.

The application discloses a kind of mobile power car and grid diesel generator protection method and system based on Teager energy operator.This method only utilizes power car machine end single-end measurement data, without relying on external communication or external CT.Through processing the collected voltage and current signals, the instantaneous energy value is calculated using Teager energy operator, and a multi-dimensional feature index is constructed to accurately distinguish and differentiate the faults inside and outside the vehicle.This method has small calculation amount and extremely fast response speed, can identify faults in the initial stage of short-circuit current rise, reduce the impact of faults on the generator, has strong anti-interference ability, can effectively shield the mis-trip caused by non-short-circuit disturbance of the power grid, and can also sensitively capture early minor faults inside the generator.

This application discloses an automotive wheel hub mold with upper and lower split side molds, including an upper mold, a lower mold, and several side molds. The side molds include a front wheel rim side mold and a rear wheel rim side mold that fit together vertically. The front wheel rim side mold is equipped with a cooling device. This cooling device guides the cooling medium to uniformly and rapidly cool the thickness portion where the front wheel rim connects to the spokes. It includes a cooling chamber, a reflector plate, a water inlet pipe, and a return pipe. The reflector plate is located at the top of the cooling chamber. One end of the water inlet pipe extends into the cooling chamber and slopes upwards towards the reflector plate. The core solution employs a cooling device with a reflector plate. Through optimized pipe structure and program control, uniform dispersion and cooling of the cooling medium are achieved, improving the casting efficiency and solidification quality of this type of wheel, while reducing localized thermal shock to the mold and reducing the risk of surface cracking.

The present invention belongs to the technical field of photoelectric sensors, and specifically relates to a sensor mounting device, including a mounting support in the shape of a circular ring plate and at least three flexible support seats evenly distributed along the circumference of the mounting support. The flexible support seat includes a two-dimensional flexible hinge, a support base, an upper cylinder and a stiffness control hole. The two-dimensional flexible hinge includes a stiffness adjustment plate, a first flexible hinge chain and a second flexible hinge chain that are perpendicular to each other. The two ends of the stiffness adjustment plate are respectively fixedly connected to the first flexible hinge chain and the second flexible hinge chain, and the hinge beam of the second flexible hinge chain is radially arranged along the mounting support; the fastener connects the support base and the mounting support; the upper cylinder can abut and support the sensor; the stiffness control hole extends axially along the flexible support seat. The sensor mounting device of the present invention can balance the thermal deformation of the sensor and has a high thermal resistance, reduce the thermal shock on the workbench, and has a simple structure and positioning method, which is easy to process and install, and reduces the design and manufacturing costs.

The invention discloses a three-section pipeline parallel purging system of a supercritical secondary reheating boiler. Comprising a separator, a superheater, an ultrahigh pressure main steam valve, a superheater temporary blowing valve, a superheater target plate device, a primary reheating temporary blowing valve, a primary reheater inlet particle collector, a primary reheater, a primary reheater outlet isolating valve, a primary reheater target plate device, a secondary reheating temporary blowing valve, a secondary reheater inlet particle collector, a secondary reheater and a secondary reheater outlet isolating valve. The device comprises a secondary reheater target plate device, a temporary high bypass valve, a temporary drain valve and a silencer. By means of undisturbed switching among the superheater temporary blowing valve, the primary reheating temporary blowing valve and the secondary reheating temporary blowing valve, the defect that a temporary pipeline is switched when the boiler is shut down after pipe blowing in the first stage of the secondary reheating boiler is overcome, the starting and stopping frequency of the boiler is reduced, heat shock of all heating surfaces is reduced, the service life of the boiler is prolonged, fuel oil, fire coal and other resources are saved, and the energy-saving effect is achieved. Meanwhile, personal injury is avoided, and it is guaranteed that capital construction projects are safely and orderly conducted.

This invention relates to the field of power regulation technology, and particularly to an AC power regulation method and system based on zero-crossing control. The method includes: calculating a target output voltage based on a set power or control target; determining a corresponding operating level from a set of preset voltage levels based on the target output voltage; ensuring the target output voltage does not exceed the voltage of the highest voltage level among the preset voltage levels; calculating the number of conduction cycles of the operating level within one power regulation cycle based on the target output voltage; and controlling the operating level to turn on or off at the voltage zero-crossing moment within one power regulation cycle based on the number of conduction cycles. This invention presets multiple voltage levels and combines them with zero-crossing conduction control to map the target voltage to a combination of level and conduction cycle number, switching levels at the zero-crossing moment, preserving low harmonic characteristics, improving power regulation resolution, reducing power jumps and thermal shocks, and achieving high-precision, low-interference AC power regulation.

The utility model discloses a strain fermentation tank based on waste heat phase change energy storage, which comprises a tank body, a stirring system and a jacket temperature control system, a jacket is arranged on the outer wall of the tank body, a phase change material layer is filled between the jacket and the outer wall of the tank body, and the melting point of the phase change material is minus DEG C; a cooling water inlet of the jacket is positioned at the bottom of the tank body, a cooling water outlet is positioned at the top of the tank body, and a phase change material layer (with the melting point of 28-32 DEG C) filled between the jacket and the outer wall of the tank body forms a thermal buffer zone near the optimum growth temperature of strains by utilizing the phase change energy storage characteristic. When hyphae metabolize to produce heat, the phase change material preferentially absorbs latent heat to delay temperature rise; after the cooling system is started, heat stored in the cooling system is slowly released, and sudden temperature drop is avoided. Compared with the periodical fluctuation of + / -2 DEG C of a traditional jacket, the structure can control the temperature fluctuation to be + / -0.5 DEG C, thermal shock is reduced through a smooth temperature curve, and the enzyme activity of hyphae is kept stable.

The invention discloses an oilfield gas steam injection boiler, comprising a radiation section, a convection section, and a condensation section arranged along the flow direction of flue gas, wherein the convection section is provided with a convection section light pipe and a convection section finned tube, and a high dry section is added between the convection section light pipe and the convection section finned tube, wherein the high dry section is provided with a high dry section light pipe and a high dry section finned tube, and the flue gas passes through the radiation section, the convection section light pipe, the high dry section light pipe, the high dry section finned tube, the convection section finned tube, and the condensation section heat exchange light pipe in sequence. The flue gas condenser can further reduce the flue gas temperature, absorb the latent heat of vaporization of water vapor in the flue gas, form condensed water, and improve the boiler efficiency to more than 100%. By optimizing the heating surface and designing the flue structure, the heat exchange ratio of the radiation section and the convection section is optimized to 5:5, and the heat exchange is more in line with the heat release characteristics of the natural gas flame. The tail flue gas resistance is reduced by three different forms of pressure reduction during the flue gas flow process.

The utility model discloses a metal processing quenching frock, including main part, lifting mechanism, placing mechanism and adjusting mechanism, the lifting mechanism includes motor and lead screw, the placing mechanism includes placing box and support frame, the adjusting mechanism includes drive link and connecting rod, under the mutual cooperation of above -mentioned mechanism, this device slowly sinks into the cooling liquid metal piece, can reduce the thermal shock of initial cooling, avoid the crack of material suddenly meeting cold, in addition, this device quenching multiple work pieces in one time, improve work efficiency, especially suitable for mass production, and reduce the no -load time and energy consumption of each lifting, heating, cooling.