78results about How to "Uniform temperature drop" patented technology

The invention relates to a method for controlling a mass concrete cooling introduced water flow. The method comprises the following steps of: (1), obtaining a value of a historical concrete introduced water cooling efficiency; and (2), calculating a required next flow control value according to the value of the historical concrete introduced water cooling efficiency and a cooling amplitude and a cooling time interval to be required in the future, and uniformly decreasing concrete temperature according to design requirements through the above steps. According to the method for controlling the mass concrete cooling introduced water flow, provided by the invention, by introducing dynamic adjustment of a practical cooling flow coefficient alpha and by matching with auxiliary modification of a lag coefficient ksi, internal temperature of concrete can be uniformly and stably decreased, and the purpose of controlling a target temperature can be achieved during an expected time; furthermore, automatic calculation of a cooling water flow is realized, manual control arbitrariness can be excluded, and the construction quality of mass concrete can be further increased.

The invention relates to the technical field of metal cutting tools, in particular to a metal cutting tool for high-speed cutting, and overcomes the defects of poor stability and easiness in deformation and damage in the prior art. The metal cutting tool comprises a mounting seat, a tool handle and a tool bit; a cooling box and a driving spindle are fixed to the top of the mounting seat through bolts; a liquid spraying pipeline is fixedly connected to the bottom of the cooling box through a flange plate; a mounting groove is formed in the mounting seat; screw holes and through holes are formedin the inner wall of the mounting groove; the screw holes and the through holes communicate with the interior of the mounting groove; and positioning steel balls are embedded into the screw holes. Through arrangement of the structures such as locking screws, damping springs, positioning steel balls, mounting blocks and hemispherical grooves, the mounting mode of the tool is simplified, the damping springs in the tool can play a role in damping the tool after being mounted, the overall stability of the tool is improved, and the machining precision of the tool is ensured.

The invention relates to a B-containing martensitic steel strip and a manufacturing method thereof. The B-containing martensitic steel strip comprises the following components in percentage by weight:0.16-0.26% of C, 0.1-0.5% of Si, 0.4-1.7% of Mn, smaller than or equal to 0.02% of P, smaller than or equal to 0.007% of S, 0.004-0.010% of N, smaller than 0.001% of Als, 0.001-0.006% of B, 0.007-0.020% of total oxygen [O]T, the balance of Fe and inevitable impurities, one or two of 0.1-0.6% of Cu or 0.005-0.04% of Sn, one or two of 0.01-0.08% of Nb and 0.1-0.4% of Mo, and greater than 250 of Mn / S. According to the B-containing martensitic steel strip, residual Sn, Cu and other elements in scrap steel are used for smelting, and Nb / Mo and other microalloy elements and an element B are selectively added. According to the B-containing martensitic steel strip, the yield strength is 800-1200 MPa, the tensile strength is 1100-1900 MPa, the elongation is 3-12%, the martensitic steel strip can bewidely applied to the field of high-strength automotive steel, and a wide space is provided for the automobile industry in the aspects of light weight, energy consumption reduction and fuel economy improvement.

The invention provides a dairy product cooling device based on a water cooling mode, and relates to the field of dairy product cooling. The cooling device solves the problem that the existing diary product cooling is large in water consumption and poor in cooling effect. The cooling device comprises a cooling box, and the bottom of the cooling box is welded to the top of a base through overhead legs, and the side wall of the cooling box close to the top is provided with a feeding port, and the side wall of the cooling box close to the bottom is provided with a discharging pipe in communication, and a water and air integrated cooling mechanism is arranged inside the cooling box. The cooling device introduces water to a water cooling pipe inside a cooling elbow to promote cooling, and an airpump introduces outside cold air into the cooling elbow through an air guide pipe. A gear motor drives the cooling elbow through a pulley to rotate inside a dairy product to promote uniform temperature reduction of the dairy product and also drive stirring of the dairy product to expose the portion with higher temperature to promote cooling.

The invention provides a heat preservation device for castings. The heat preservation device comprises a shell, a furnace cover, heating devices and a heat preservation chamber. Supporting legs are fixed to the bottom of the shell. A heat preservation layer is arranged on the inner side of the shell. A floor tile layer is arranged on the inner side of the heat preservation layer. The heat preservation chamber is arranged in the shell. A sand layer is arranged at the bottom of the heat preservation chamber. The heating devices are installed on the two sides of the heat preservation chamber. Refractory fiber layers are arranged on the outer sides of the heating devices. Air pipes are arranged on the two sides of the upper end of the heat preservation chamber. A circulating hot air device is installed above the furnace cover. A negative-pressure cavity of the circulating hot air device is connected with one end of an air return pipe. An air return port is connected to the other end of the air return pipe and located in the bottom end of the furnace cover. A positive-pressure cavity of the circulating hot air device is connected with one end of an air supply pipe. The other end of the air supply pipe is connected with an air supply port. Compared with the prior art, the heat preservation device for the castings has the following beneficial effects that temperature distribution is even, and temperature control is facilitated.

The invention provides an aluminum profile quenching system. The system comprises a quenching table, a nozzle assembly, a water pump, a water groove, a ball valve controller, a temperature measuring unit, an operation panel and a control unit. The quenching table transmits and quenches aluminum profiles, and the nozzle assembly is arranged on the periphery of the quenching table and sprays water mist to the aluminum profiles; the water pump and the water groove are connected with the nozzle assembly through a pipeline and provide a water source; the ball valve controller is arranged between the water pump and the nozzle assembly, and can adjust the water mist spraying speed and / or flow of the nozzle assembly; the temperature measuring unit is arranged on a feeding opening and a discharging opening of the quenching table to detect the first temperature T1 of aluminum profiles obtained before quenching and the second temperature T2 of the aluminum profiles obtained after quenching; the operation panel is used for inputting parameters of the aluminum profiles; and the control unit receives parameters sent by the operation panel and the first temperature T1 and the second temperature T2 sent by the temperature measuring unit and outputs an instruction to the ball valve controller according to the parameters, the first temperature T1 and the second temperature T2 so as to adjust the mist spraying speed and / or flow of the nozzle assembly. Therefore, according to the quenching requirements of different aluminum profiles, the quenching cooling condition can be adjusted in real time, and the profiles are prevented from deforming.

The invention discloses thin-strip continuously cast high-reaming steel and a production method thereof. The steel comprises the following chemical components in percentage by weight: 0.01-0.05% of C,0.2-0.6% of Si, 0.8-1.5% of Mn, smaller than or equal to 0.02% of P, smaller than or equal to 0.005% of S, smaller than or equal to 0.008% of N, smaller than 0.001% of Als, smaller than or equal to 0.0050% of Ca, greater than 250 of Mn / S, 0.007-0.020% of total oxygen [O]T and the balance of Fe and other inevitable impurities. In the smelting process, the alkalinity of slag, the types and meltingpoints of inclusions in the steel, the content of free oxygen in molten steel and the content of acid-soluble aluminum Als are controlled; then a cast strip with a thickness of 1.5-3 mm is cast through twin-roll thin-strip continuous casting, and the cast strip directly enters a lower closed chamber with a non-oxidizing atmosphere after being discharged out of a crystallization roller and enters an online rolling mill under the closed condition to be subjected to hot rolling; strip steel is cooled in a gas atomization cooling manner after being rolled; and finally the produced steel coil can be directly used as a hot rolled plate and can also be used after being subjected to acid pickling and leveling.

The embodiment of the invention provides a preparation method of a nanometer-sized solid beverage vegetarian food. The preparation method comprises the following steps of: classifying and screening a variety of food raw materials according to the the contents of starch and protein, classifying the food raw materials into multiple categories and respectively processing in millimeter, micron and nanometer scales according to the different categories, and then respectively mixing, finally processing in the nanometer scale. According to the invention, the food materials with larger particles are mixed, and the principle of physical cooling is used, so that the problem of carbonization of the proteins and starch easily generated in the preparation process is solved.