102results about How to "Increase heating rate" patented technology

The embodiment of the invention provides a charging and discharging circuit and method, computing equipment and a storage medium thereof, two energy storage elements in the charging and discharging circuit are connected through a first adjusting switch module, heating control is carried out after a switch is closed, and self-heating of a battery is realized by utilizing alternating current generated by a charging and discharging loop between a dual-drive motor and the battery; according to the invention, the charging and discharging loop between the power battery and the energy storage element can be flexibly adjusted under the condition that the original motor structure is not changed; the battery self-heating scheme can be carried out by flexibly adjusting charging and discharging of the double-drive motor while the cost is reduced, and the heating rate is increased.

The invention relates to the technical field of bio-based polyols, and discloses a mixing device capable of degrading bio-based polyols / polyprotic acids, the mixing device comprises a tank body and a heating device, the heating device comprises a gas outlet bin, the gas outlet bin is installed at the top of the tank body, the inner side of the gas outlet bin is connected with a gas inlet bin, the gas outlet bin is connected with a gas outlet pipe, and the gas outlet pipe is connected with a gas inlet pipe. The air inlet bin is connected with an air inlet pipe, a plurality of ventilation pipes are slidably installed on the inner wall of the air inlet bin and the inner wall of the air outlet bin, and the bottoms of the ventilation pipes are connected with a plurality of circulating pipes respectively. Through the arrangement of the heating device, the multiple circulating pipes can exchange heat of steam in the circulating pipes into reactants in the tank body, so that the heating effect is achieved, and the multiple circulating pipes can increase the contact area with the reactants through vertical reciprocating motion, so that the heating rate is increased; and moreover, the heat contacted with reactants in the tank body is relatively uniform.

The utility model relates to the technical field of injection molding devices, in particular to a double-head injection molding device for injection molding of a plastic remote control car shell, molten materials are extruded into a mold to form a product in an injection molding mode, the double-head injection molding device comprises a rack, an injection molding assembly installed on one side of the rack and a mold closing assembly installed on the other side of the rack, a first mold mounting plate is arranged at the discharging end of the sleeve, the first mold mounting plate is fixed to the top of the rack, a first flow divider used for dividing materials is arranged in the first mold mounting plate, and two injection molding heads are connected to the first flow divider through pipelines; according to the utility model, the spiral heating wire is sleeved on the pipeline of the first flow divider and is used for increasing the heating area, so that the heating is more uniform, the heating speed is high, and meanwhile, air is introduced into the injection molding head in a matched manner to blow blocked materials into the sleeve, so that the waste of the materials is avoided.

The invention relates to an electric vehicle hybrid power assembly thermal management system based on an amorphous alloy material and a control method, and belongs to the field of new energy vehicle thermal management. The system comprises a motor, an engine, a condenser, a radiator, an air conditioning box, a refrigeration heat exchanger, a liquid cooling plate, a power battery and a heating device. The method comprises the following steps of: judging comparison conditions of a current external environment temperature and a preset low-temperature threshold value and a preset high-temperature threshold value, and corresponding to three working modes; in the first mode, a battery needs to be heated, and a motor / engine needs to be cooled; in the second mode, the battery does not need heat management temporarily, and the motor / engine needs heat dissipation; and in the third mode, the battery and the motor / engine need to be cooled. According to the heating method, the heating device works with high heating power at the extremely low temperature, and the heating device works with low heating power at the low temperature. The system has the advantages that the low-temperature heating rate is high, the integrated heat management configuration is simplified, and the system is suitable for new energy vehicle types in various power forms.

The invention relates to the technical field of glass manufacturing, and discloses a burning gun replacement method and a burning gun replacement device under the hot state condition of a kiln. The method for replacing the burning gun under the hot state condition of the kiln comprises the following steps: taking down an old burning gun from a mounting hole of the kiln under the hot state condition; the new burning gun is preheated through a preset technology; and a new preheated burning gun is mounted in the mounting hole. According to the method for replacing the burning gun under the hot state of the kiln, the burner block of the burning gun and the brick structure of the kiln can be prevented from being damaged, so that the production progress of glass is guaranteed, and the production cost of the glass is reduced.

The utility model discloses a solar energy and multi-energy complementary heating hot water supply device which comprises a shell, the side face of the shell is communicated with a water inlet pipe and a water outlet pipe, the outer side of a straight plate is movably connected with a through hole in the top of a cover body, a plurality of round holes are machined in the straight plate, the inner sides of the round holes are movably connected with heating rods, and the heating rods are arranged on the outer side of the shell. A copper plate embedded in the inner side of the shell is arranged below the straight plate, a heating wire is attached to the outer side of the copper plate, and the top of the heating wire is electrically connected with a power supply unit fixed to the outer side of the shell. The utility model relates to the technical field of solar water heaters, in particular to a solar water heater, which improves the heating rate by matching a heating rod, a straight plate and a heating wire and adopting a mode of heating the inside and the side surface of water, and solves the problems that the heating speed of an existing device is ordinary, the heating time is prolonged when normal-temperature water enters the device, and the heating efficiency is further influenced.

The application discloses a reaction device for preparing high-purity lithium carbonate, which comprises a calcination device base, a calcination furnace support frame is fixedly installed on the top surface of the calcination device base, a movable assembly is movably installed on the top surface of the calcination device base, an automatic discharging assembly is fixedly installed on the top surface of the calcination device base, and a collecting assembly is fixedly installed on the side surface of the calcination device base. The automatic discharging assembly is arranged, the rotating screw rod can rotate in the first fixed plate, the moving column can move horizontally on the top surface of the calcination device base, the electric telescopic rod is elongated, the calcination furnace body is driven to ascend as a whole, the connecting shaft is driven to rotate through the third driving device, the sleeve joint ring can be overturned together with the calcination furnace body by a certain angle, the automatic pouring of raw materials can be realized, and manual discharging work is replaced, so that the practicability of the device is improved.

The utility model relates to the technical field of heat recovery devices, and discloses a steam turbine exhaust steam heat recovery device. The steam turbine exhaust steam heat recovery device comprises a box body, an air inlet pipe is arranged on the upper side of the left side wall of the box body, an air outlet pipe is arranged on the lower side of the right side wall of the box body, a heat exchange pipe is arranged on the bottom wall of the air inlet pipe, the heat exchange pipe is arranged on the top wall of the air outlet pipe, and the heat exchange pipe is located in an inner cavity of the box body. According to the scheme, through cooperation of the box body, the air inlet pipe, the air outlet pipe and other devices, water in the inner cavity of the box body can be conveniently and evenly heated through the device, water can be rapidly heated, and the heating efficiency of the device can be improved; and the heat exchange mesh, the heat exchange pipe, the box body and other devices are arranged to be matched, so that the device can conveniently recover heat in waste gas, more heat can be conveniently conducted into water, and the heating rate can be increased.

The present invention belongs to the technical field of processing raw materials for jujube wine, and provides a jujube wine raw material crusher, including a shell, the inner wall of the shell is rotatably connected with a screening cylinder, and the screening cylinder can rotate continuously under the drive of a rotating motor; the inner wall of the screening cylinder is rotatably connected with a plurality of screen plates through an elastic torsion spring, and the inner wall of the shell is fixedly connected with an elastically retractable brush plate, and the brush plate can elastically abut against the inner wall of the screening cylinder, and a cleaning mechanism is provided on one side of the brush plate. In the present invention, after the jujube wine raw material is crushed by a crushing roller, the jujube wine raw material falls into a filter plate, and then the crushing roller and the filter plate jointly crush the jujube wine raw material for a second time; at this time, the crushing roller drives the elastic push block to push the block, and the block drives the filter plate to move along the arc groove, and the filter plate swings back and forth along the arc groove under the drive of the elastic rod, and the reciprocating swing of the filter plate can improve the crushing and drying effect of the jujube wine raw material.

The invention discloses a low-temperature power battery thermal management system and a control method thereof, relates to a new energy technology, and aims to solve various problems of a lithium ion battery in a low-temperature environment. In the system, a micro-channel heat exchanger comprises a main flow plate and a plurality of micro-channel heat exchange plates, dozens of single-channel units are arranged in the micro-channel heat exchange plates, frames capable of moving along the inner walls of the single-channel units are arranged in the single-channel units, and liquid channels in the main flow plate are communicated with an anti-freezing liquid tank and the micro-channel heat exchange plates; the micro-channel heat exchange plate is communicated with an inlet of the anti-freezing solution tank to form an anti-freezing solution flowing channel; the first circulating pump is arranged in the flow channel; the storage battery heats the anti-freezing solution tank; the temperature sensor measures the temperature of the power battery; and the controller controls the first circulating pump to work according to a measurement result of the temperature sensor. The method comprises the steps that temperature data collected by a temperature sensor are obtained in real time, and two circulating pumps are controlled to work alternately according to the temperature data until the temperature data reach a preset threshold value.

The invention relates to the technical field of chemical engineering, and discloses an olefin preparation system. In the olefin preparation system, the raw material fluid and the hot carrier fluid are mixed in the cracking device and are subjected to cracking reaction to obtain the cracking fluid to prepare the product olefin, so that the heating rate and the heating temperature of the raw material fluid can be increased, the olefin yield can be increased, and the cracking pressure can be increased; the processing capacity of the equipment is improved and the energy consumption of the system is reduced while the high olefin yield is ensured. The raw material fluid is preheated by the preheating flow path before being mixed with the hot carrier fluid, so that the heating efficiency of the raw material fluid can be improved, heat energy generated by the fractionation device can be fully utilized, and the energy consumption of the system is further reduced. And moreover, the preheated raw material fluid is relatively low in temperature, so that the problem of coking in advance is avoided.

The invention discloses a fuel cell system and a water state control method thereof, and relates to the technical field of fuel cells, the system comprises a fuel cell stack, and a bipolar plate of the fuel cell stack is internally provided with a cooling liquid flow channel for introducing a cooling liquid with a set temperature; a magnetic heat conversion device is arranged on the outer side of the cooling liquid flow channel; the cooling liquid circulation subsystem is communicated with a cooling liquid flow channel in the fuel cell stack through a pipeline; and the water state control subsystem can monitor the temperature of the cooling liquid entering and exiting the fuel cell stack and the spatial distribution of different forms of water in the fuel cell stack, and respectively controls the working state of the cooling liquid circulation subsystem and the working state of the magnetic-thermal conversion device according to the temperature and water state distribution information. According to the fuel cell system and the water state control method thereof, the uniform distribution of water states between single sheets and in the sheets in the low-temperature rapid cold start and normal operation process can be realized, the occurrence of local water flooding or film drying faults is avoided, the output performance of the fuel cell system is improved, and the service life of the fuel cell system is prolonged.

The invention discloses an efficient fuel gas heating system. The heating system comprises a fuel gas / combustion-supporting gas ratio control system, an automatic ignition system, a combustion torch fixing support, a lifting moving platform, an annular combustion torch and a detection control system. The combustion torch, the combustion torch fixing support and the lifting moving platform are sequentially and fixedly connected from top to bottom. The lifting moving platform can move and lift; the fuel gas / combustion-supporting gas ratio control system is used for connecting a fuel gas source and a combustion-supporting gas source and adjusting the ratio of fuel gas to combustion-supporting gas to an optimal mixing ratio; the automatic ignition system is connected with the fuel gas / combustion-supporting gas ratio control system and the detection control system and used for achieving ignition of the combustion torch. And the detection control system is used for controlling the automatic ignition system and the fuel gas / combustion-supporting gas ratio control system. The heating system has the characteristics of sufficient combustion, high efficiency, high heat flux density, uniform heating, high temperature of the heating end and adjustable height position of the combustion torch.

The application discloses a kind of oil exploitation method and device for strengthening the rate of horizontal well group heat mass transfer, the method comprises: when meeting preset heating condition, start heating, at this time, close the production well in the horizontal well group, open the injection well in the horizontal well group, open the electric heater arranged in the injection well, and inject hot gas into the injection well, wherein the heating condition comprises: the daily gas production of the production well is less than the preset production value and the horizontal well group produces horizontal fracture and / or vertical fracture meeting the requirements;After heating is completed, the injection well is closed, the production well is opened, and oil exploitation is started.The application proposes a synergistic heating method combining electric heating and hot gas injection, and uses a cyclic production mode, significantly improves the reservoir heating rate and heat mass transfer efficiency, effectively improves the oil exploitation effect and efficiency of the horizontal well group.

The invention provides a battery heating method, a battery heating system and a vehicle. The method is applied to a vehicle control unit in a battery heating system of a vehicle, the battery heating system further comprises a motor, a compressor and a compressor, the vehicle control unit is in communication connection with the motor and the compressor, and a refrigerant is used for heat conduction; the method comprises the steps that under the condition that it is determined that a battery pack of a vehicle is heated, the current state information and the environment temperature of the vehicle are determined; a locked-rotor strategy is determined according to the environment temperature and the state information, the locked-rotor strategy is used for controlling target locked-rotor objects in the battery heating system to enter a locked-rotor mode, and the target locked-rotor objects are one or more of a motor and a compressor; and controlling the target locked-rotor object to enter a locked-rotor mode according to the locked-rotor strategy, so that the refrigerant carries heat generated by the target locked-rotor object in the locked-rotor mode to the battery pack to heat the battery pack. The battery pack can be heated in a low-temperature environment without installing a heating element.

The utility model discloses a waste water desalination evaporator which comprises a storage bin, a dredging pipe is fixedly installed at the top of the storage bin, a drainage seat is fixedly installed at the output end of the dredging pipe, a plurality of sets of heating rings are sequentially installed on the outer surface of the storage bin from bottom to top, and a fixed power source is fixedly installed on the inner wall of each heating ring. An electric heating ring is electrically installed on one side of the fixed power source, the electric heating ring penetrates through the interior of the storage bin, a glass cover is installed at the top of the storage bin in an embedded mode, a liquid injection connector is formed in the outer surface of the glass cover, and a drainage fan is fixedly installed on the inner wall of the drainage base. Through cooperation of the heat preservation structure, the waste water in the storage bin can be heated in a balanced mode, it is guaranteed that the waste water in the device is heated and evaporated in a balanced mode, the condensation phenomenon in the steam conveying process can be guaranteed through the arrangement of the heat preservation structure, and then it is guaranteed that the device conducts efficient waste water desalination and evaporation work.

The utility model provides a neodymium iron boron hydrogen demolishing reaction system which comprises a hydrogen demolishing furnace, the hydrogen demolishing furnace comprises a furnace body, a first inner cavity and a second inner cavity are arranged in the furnace body, the first inner cavity is embedded in the second inner cavity, a closed circulation channel is formed between the first inner cavity and the second inner cavity, and the first inner cavity is communicated with the second inner cavity. The circulating channel is used for being filled with heating or cooling fluid to heat or cool the first inner cavity, the first end of the furnace body communicates with the circulating channel, and the second end of the furnace body communicates with the first inner cavity; the heat preservation part is arranged on the peripheral side of the furnace body and comprises a driving mechanism, a first heat preservation part and a second heat preservation part, when the first inner cavity is heated, the first heat preservation part and the second heat preservation part wrap the outer surface of the furnace body through the driving mechanism, and when the first inner cavity is cooled, the first heat preservation part and the second heat preservation part wrap the outer surface of the furnace body through the driving mechanism. The first heat preservation part and the second heat preservation part are far away from the outer surface of the furnace body through the driving mechanism.

The utility model provides a barbecue oven heating wire fixing structure, a heating wire is of a wave-shaped long ring structure, the fixing structure comprises a surrounding plate and a bottom plate, the surrounding plate is of a rectangular frame-shaped structure, the surrounding plate is arranged around the periphery of the bottom plate, the heating wire is located above the bottom plate, and fixing pieces are arranged on the left side and the right side of the bottom plate. The fixing pieces are fixedly connected with the front end and the rear end of the surrounding plate through limiting columns and fixedly connected with bent parts on the left side and the right side of the heating wire through connecting rods, the upper end of the surrounding plate is horizontally folded inwards to be provided with a pressing edge, the fixing piece on one side is provided with an installation strip, the installation strip is pressed above the fixing piece through the pressing edge, and a power source connecting piece is fixedly arranged on one side of the heating wire. The power connecting piece extends out of the coaming notch and is connected with the power anode and cathode; the coaming edge pressing structure is arranged on the outer layer of the heating wire, armoring treatment is not carried out, cost is reduced, deformation of the heating wire is buffered through connection and positioning of the rectangular block fixing piece and limiting of the bottom limiting column, the heating rate of the heating wire is increased, and heating and cooking of food materials are accelerated.

The invention relates to the technical field of plastic welding, in particular to a hot air plastic welding gun which comprises a power connection control mechanism, a central air conveying mechanism and a multi-channel temperature increasing mechanism, the central air conveying mechanism is installed at the upper end of the power connection control mechanism, and a heat insulation air guide mechanism is installed at the upper end of the central air conveying mechanism; a multi-channel temperature increasing mechanism is installed on the inner side of the heat insulation air guide mechanism. The power connection control mechanism comprises a ventilation bottom cover. By adopting the square brushless motor, the installation gap can be effectively enlarged, maintenance, disassembly and assembly are convenient, dust accumulation is avoided, air is conveniently and uniformly heated and intensively output through diversion of multiple channels, and the plastic welding speed and quality are effectively improved; the problems that according to an existing hot air welding gun, a cylindrical brushless motor is used for conveying air, the installation gap of the brushless motor is small, disassembly, assembly and overhaul are inconvenient, dust is prone to being accumulated, airflow is inconvenient to evenly heat, the heating effect is poor, and the welding quality and the welding speed are affected are solved.

The application relates to a liquid rocket engine test heating device, in particular to a liquid rocket engine inner cavity induction heat accumulation type hot nitrogen gas supply device and method, and solves the technical problem that the existing low-temperature liquid rocket engine usually adopts an external hot air forced convection or electric heating wire heating nitrogen gas mode to heat the pipeline and the engine inner cavity nitrogen gas, and it is difficult to meet the low-temperature liquid rocket engine pipeline and engine inner cavity rapid temperature recovery requirement. The liquid rocket engine inner cavity induction heat accumulation type hot nitrogen gas supply device comprises a heating unit, a pressure monitoring unit, a temperature monitoring unit and a control unit; the heating unit comprises a buffer tank and a heating assembly arranged on the buffer tank; an air inlet of the buffer tank is used for being connected with an air source; the pressure monitoring unit and the temperature monitoring unit are arranged on the buffer tank and are connected with the control unit respectively; and the control unit is used for controlling the heating assembly to work according to the inner cavity nitrogen gas temperature and the outer wall temperature of the buffer tank.

The invention discloses a control method and device of a cooling fan, an integrated cooker and a storage medium, and relates to the technical field of artificial intelligence. Comprising the steps that in a current task period, the current temperature in a steaming oven is obtained through a first temperature sensor, and the current heat dissipation temperature of a heat dissipation fan is obtained through a second temperature sensor; according to the current temperature in the box and the current heat dissipation temperature, the current rotating speed value of the heat dissipation fan in the current task period is determined; and the cooling fan is controlled to operate based on the current rotating speed value, so that the temperature in the oven reaches the target temperature value when the steaming oven is in the preset time. According to the technical scheme, the rotating speed of the heat dissipation fan can be accurately adjusted in advance, the defect that in the prior art, heat dissipation cannot be judged in advance, and hysteresis exists can be overcome, when the temperature in the box is low, heat cannot be wasted, and the heating rate of the integrated cooker can be increased; when the temperature in the box rises or rises too fast, the heat dissipation efficiency of the integrated cooker can be improved, and the experience feeling of a user using the integrated cooker is improved.

The invention relates to the technical field of nuclear power plant maintenance instrument control, and discloses a nuclear power plant self-feedback temperature control and self-adaptive reducing transparent hose heating device which comprises a controller and a heating mechanism which are electrically connected, the heating mechanism is provided with a fixing plate, the fixing plate is connected with a static handle, and a driving gear and a set of driven gears are installed on the fixing plate. The driving gear is an inner meshing gear, the group of driven gears are outer meshing gears and are meshed with the driving gear, each driven gear is connected with a heating copper sheet to rotate in the same direction, the heater heats the heating copper sheets, a rotating ring is arranged outside the driving gear, a movable handle is connected to the rotating ring, and a compression spring is arranged between the movable handle and the static handle. The pipeline connector can be softened in time, safe connection with an instrument is facilitated, the pipeline is stabilized on the instrument connector after being cooled, and the situation that the instrument is abnormal due to the fact that the pipeline is slightly damaged due to misoperation of the instrument pipeline is avoided.

The invention discloses a reactor cabin temperature and thermal stress distribution test device and a test method thereof. The device comprises a test cabin measuring point module, a heat source control module and a data acquisition module, the test chamber measuring point module comprises a reactor chamber test chamber, strain gauges and thermocouples, and the strain gauges and the thermocouples are distributed on the inner wall and the outer wall of the reactor chamber test chamber; the heat source control module comprises a heater, a temperature controller, a heating controller, a fan and a temperature sensor; the data acquisition module comprises a static strain gauge, a thermocouple signal acquisition card and an upper computer; the static strain gauge is used for acquiring temperature data of the strain gauge and transmitting the temperature data to the upper computer, and the thermocouple signal acquisition card is used for acquiring temperature data of the thermocouple and transmitting the temperature data to the upper computer. The device for testing the temperature and thermal stress distribution of the reactor cabin can detect the overall temperature and stress distribution of the reactor cabin, and provides a test platform for thermal load parameter design of a reactor cabin structure.

The invention provides a liquid crystal display panel and a display device. The liquid crystal display panel comprises a first substrate, a second substrate, a liquid crystal layer and a coil. Wherein the second substrate and the first substrate are oppositely arranged; the first substrate and the second substrate are fixedly connected through the frame glue, and the first substrate, the second substrate and the frame glue define a containing cavity. The liquid crystal layer is arranged in the accommodating cavity; the liquid crystal layer comprises a plurality of liquid crystal molecules; the coil surrounds the liquid crystal layer; the coil can generate a magnetic field to heat the liquid crystal molecules when electrified. Wherein the coil is arranged around the axis direction of the liquid crystal display panel; the axis direction is parallel to the liquid crystal display panel. According to the liquid crystal display panel, smear and color smear phenomena of the liquid crystal display panel can be avoided, and the display effect of the liquid crystal display panel is effectively improved. In addition, the heating rate of liquid crystal molecules can be effectively increased, and the smear and color smear phenomena are further improved.

The invention discloses a heat preservation pouring device for autoclaved aerated concrete block production, and relates to the technical field of concrete block production, the heat preservation pouring device comprises a mixing box used for mixing concrete raw materials and a stirring rod, and the stirring rod is rotatably installed in an inner cavity of the mixing box through a driving motor; heating equipment used for heating concrete raw materials is installed outside the mixing box, a heat preservation assembly used for heat preservation of the mixing box is arranged outside the mixing box, the heat preservation assembly comprises an electric heating wire and a heat preservation cylinder, the heat preservation cylinder is fixedly sleeved with an inner cavity of the mixing box, and an inner cavity of the heat preservation cylinder communicates with an inner cavity of the mixing box; a sealing ring is fixedly installed at the bottom of an inner cavity of the heat-preservation cylinder. According to mutual cooperation of all the parts, heating of the outer wall of the mixing box is facilitated, so that the evaporation rate of water in concrete raw materials is reduced, the concrete raw materials attached to the inner wall of the mixing box are not prone to solidification, and adverse effects on subsequent processing of the concrete raw materials are effectively reduced.

A method for preparing gradient MWCNTs-Ti (C, N)-based metal ceramic through spark plasma sintering relates to the field of powder metallurgy and comprises the following steps that S1, N kinds of mixed powder composed of titanium carbonitride, tungsten carbide, cobalt, molybdenum carbide and multi-walled carbon nanotubes are prepared, N is larger than or equal to 3, and the mass percent of the multi-walled carbon nanotubes in the N kinds of mixed powder is changed in a gradient mode; s2, the mixed powder is laid layer by layer according to the change gradient of the multi-wall carbon nanotubes, and the obtained N layers of mixed powder are pre-pressed and formed to obtain a metal ceramic blank; and S3, current is applied to the side, with the lowest multi-walled carbon nanotube content, of the metal ceramic green body, spark plasma sintering is conducted on the metal ceramic green body, and the gradient MWCNTs-Ti (C, N)-based metal ceramic is obtained. The method is used for solving the technical problems that a metal ceramic microstructure is not uniform, and the fracture toughness difference of different positions is large.

The utility model relates to the technical field of hub forging, and discloses an automobile hub forging heating furnace which comprises a base, a heating furnace body is installed at the top end of the base, a heating groove is formed in the top end of the heating furnace body, a groove is formed in the bottom end of the heating groove, and an annular groove is formed in the top end of the inner wall of the groove. The hub raw materials are placed through cooperation of the placing ring and the placing table, the gear motor is used for driving the placing table to rotate, so that the hub raw materials rotate slowly, it is guaranteed that the peripheries of the hub raw materials are evenly heated by the electromagnetic heating pipes, and the hub raw materials are heated evenly through cooperation of the guide ring, the supporting guide rods and the balls. And the placing ring moves up and down synchronously in the rotating process of the placing table, so that the placing ring is separated from the placing table, an empty air channel is formed in the bottom end of the hub raw material, hot air flows at the bottom end of the hub, and the heating rate of the hub raw material is further increased.

This utility model relates to the field of oil production technology and discloses an oil raw material tank, including a tank body, a top cover fixedly connected to the top of the tank body, a connecting seat fixedly connected to the upper surface of the top cover, an oil plug rotatably connected to the outer surface of the connecting seat, and an isolation groove provided inside the tank body. This utility model has the following advantages and effects: the bottom support base provides support for the tank body. Since the oil raw materials stored inside the tank for a long time may solidify, multiple heat-conducting pipes are installed inside the isolation groove. When the oil raw materials need to be discharged, the operator activates the heat-conducting pipes to heat the inside of the isolation groove, thereby gradually raising the temperature of the containing cavity and melting the stored oil raw materials. Furthermore, the heating pipes fixed in the bottom groove inside the bottom support base simultaneously heat the bottom, increasing the heating rate of the oil raw materials inside the tank.

The present invention belongs to the technical field of electric wire tools, and in particular, relates to a large-area fine overprinting mechanism for hardcover notebooks. The present invention comprises an overprinting machine base body, on which a notebook mounting platform is provided, and above which a lifting and pressing plate capable of reciprocating linear motion in a vertical direction is provided. During use, the present invention places the notebook to be hot-stamped on the notebook mounting platform, heats the detachable font hot-stamping assembly by a hot-stamping heating element, applies copper powder and glue to the bottom of the detachable font hot-stamping assembly, and then moves the lifting and pressing plate downward, and places the font on the notebook cover by the detachable font hot-stamping assembly to realize automated large-area hot-stamping. When hot-stamping different fonts is required, the detachable font hot-stamping assembly can be replaced, and different fonts of the same specification can be used to realize hot-stamping of multiple fonts, with uniform hot-stamping, simple and convenient disassembly and assembly, and improved efficiency of font hot-stamping, with high automation and practicality.

The invention relates to the technical field of test instruments, and discloses an electromagnetic object linear expansion tester, which comprises a bottom plate, one surface of the bottom plate is provided with a fixed plate, and one surface of the fixed plate is provided with a heat conduction plate; the heating assembly is used for generating heat and heating the sample through the heat conducting plate; the temperature measuring assembly is used for detecting the temperature change of the sample; the electric lead generates a magnetic field after being electrified; the Hall element is movably arranged at the end of the sample and connected with the power supply assembly, the sample drives the Hall element to move after being heated and expanded, the Hall element output voltage expression and the magnetic field expression are combined, the movement distance of the Hall element is obtained, and the linear expansion coefficient of the sample is calculated. The linear expansion coefficient of the sample is represented through the movement of the Hall element and the change of the Hall voltage, the expansion rule at the normal temperature can be measured, the expansion at the high temperature can also be measured, the application range is widened, and the accuracy is improved.