35results about How to "Fast temperature rise" patented technology

The invention belongs to the technical field of suture line production, and particularly relates to medical suture line injection molding integrated equipment with barbs, the medical suture line injection molding integrated equipment comprises a softening assembly, a cutting assembly, a shaping assembly and the like, the softening assembly is used for softening a flat wire, the cutting assembly is used for processing barbs on the two sides of the softened flat wire in a staggered mode, and the shaping assembly is used for processing the barbs on the two sides of the softened flat wire. The rounding shaping device is used for rounding and shaping the flat wire with barbs processed. The flat wire is heated and softened through the softening assembly, so that a cutter in the cutting assembly can cut barbs on the wire more easily, the requirement for the strength of the cutter is low, meanwhile, due to the fact that the cutter cuts the softened wire to process the barbs, the cutting efficiency is improved, and the cutting efficiency is improved. Therefore, the first electric push rod for driving the cutter only needs to consume less electric energy to provide less power, so that the cutter can effectively cut the wire rod, the size of the first electric push rod serving as a driving structure is reduced to the greatest extent, and the equipment cost is effectively reduced on the basis of ensuring the requirement.

The invention provides a temperature control system for a radiation calibration device of an ultra-large-diameter infrared camera. The temperature control system comprises a meter-scale surface source blackbody radiation source, a temperature acquisition and control system, a heating plate group, a programmable power supply group, a low-temperature electromagnetic valve group, a liquid nitrogen supply system and an embedded control system, the temperature collection and control system collects the temperature of a radiation surface in real time through a temperature sensor and transmits the temperature to the control system, the temperature is compared with the set temperature, PID control is adopted, the refrigeration power and the heating power are controlled through two paths of output respectively, and the blackbody radiation source liquid nitrogen pipeline controls the meter-scale surface source blackbody radiation source through a plurality of low-temperature linear electromagnetic valves. The black body radiation source area is refrigerated; the programmable power pack controls the heating plate group to heat the blackbody radiation source area; the embedded control system realizes input and output of data, realization of a control strategy and remote transmission and communication of the data. The system can perform high-precision control and rapid measurement on the temperature of the black body, and improves the uniformity and stability of the meter-scale surface source black body.

The invention relates to fireproof and heat-insulating glass and a preparation process thereof, and relates to the field of fireproof and heat-insulating materials, the fireproof and heat-insulating glass comprises a heat-insulating film layer I, a fireproof gel layer I, a glass substrate, a fireproof gel layer II and a heat-insulating film layer II, the fireproof gel layer I and the fireproof gel layer II are prepared by adopting a mixed gel solution, the mixed gel solution is prepared from the following raw materials in parts by mass: 80 to 100 parts of bi-crosslinking gel monomer, 5 to 10 parts of crosslinking agent, 20 to 30 parts of composite flame retardant and 1 to 3 parts of initiator. The preparation process comprises the following steps: preparing a mixed gel solution, preparing the fireproof gel layer I and the fireproof gel layer II on the surface of the glass substrate, hot-pressing and laminating the heat insulation film layer I to the surface of the fireproof gel layer I, and hot-pressing and laminating the heat insulation film layer II to the surface of the fireproof gel layer II to obtain the fireproof heat insulation glass. The fireproof and heat-insulating glass has the effect of improving the interlayer binding force of the fireproof and heat-insulating glass, the stability can be improved, and the fireproof and heat-insulating performance is further improved.

The invention belongs to the field of biological industry, and particularly relates to a salt-tolerant mesophilic microorganism as well as preparation and application of a microbial agent of the salt-tolerant mesophilic microorganism. The invention provides an acinetobacter, the name of the acinetobacter is GSS19 (Acinetobacter sp.GSS19), the classification name of the acinetobacter is Acinetobacter sp., the acinetobacter is preserved in Guangdong Microbial Culture Collection Center on November 28, 2022, and the preservation number of the acinetobacter is GDMCC No.62979. The acinetobacter is named as Acinetobacter sp. The acinetobacter is resistant to salt and mesophile, and can be widely applied to recycling treatment of organic solid wastes such as kitchen garbage with high salinity. The found acinetobacter is a new species and has the composting effect similar to that of an existing commercial ultra-high-temperature composting microbial agent, and the microbial agent prepared through the method can cooperate with other ultra-high-temperature composting microbial agents to rapidly increase the temperature rising speed of ultra-high-temperature composting of the kitchen waste so as to accelerate the humus process of the kitchen waste.

The invention discloses a battery pulse heating system, a vehicle, a heating method and a computer readable storage medium. The heating system comprises an inverter, a motor, a main diode VD0, a motor controller and a battery management module, and a main switch K0 is arranged between the inverter and the positive electrode of a battery pack E; the positive electrode of the main diode VD0 is connected to the parallel end of the capacitor C of the inverter and the three upper bridge arms, and the negative electrode of the main diode VD0 is connected to the positive electrode of the battery pack E; when the state parameters, collected by the battery management module, of the battery pack E meet preset heating conditions, the battery management module sends a heating instruction to the motor controller; and the motor controller responds to the heating instruction, outputs a driving signal to control a preset target upper bridge arm switch to be switched on, and periodically controls a main switch K0 and a preset target lower bridge arm switch to be synchronously switched on and switched off. The invention has the advantages that the motor bus capacitor C and the stator inductor are simultaneously utilized to store energy, the pulse current passing through the battery pack E is increased, and the heating efficiency is improved.

The utility model relates to the technical field of sensors, and discloses a temperature sensor, which comprises a base and a mounting end at the front end of the base, a cavity is formed in the mounting end, a probe is fixedly arranged at the lower end of the cavity through a hollow support, the upper end of the probe extends into the cavity, and the lower end of the probe extends out of the hollow support. On the premise that the length of the sensor is not increased, a medium space is formed outside the probe, so that the probe is in full contact with a measured medium, the effective heat transfer of the measured medium is increased, and the probe can fully and quickly respond to the temperature change of the medium.

The invention provides clothes treatment equipment and a drying control method of the clothes treatment equipment, and belongs to the field of clothes treatment equipment. The clothes processing equipment comprises a heat pump assembly used for heating air flow in a drying air duct, a spraying device is controlled to spray an evaporator in the heat pump assembly, heat exchange can be fully conducted between a refrigerant in the evaporator and spraying water, heat in the spraying water is absorbed, and the heat in the drying air duct is heated. Therefore, the temperature of the refrigerant entering the compressor is increased, the temperature rise speed of the heat pump assembly during operation can be rapidly increased, the drying time is shortened, and the clothes drying effect is improved.

The invention relates to a novel air-cooled vibration motor which is mainly used as a vibration source on vibration equipment for coal, electric power, chemical engineering and the like. The vibration motor is composed of an adjusting eccentric block, a fixed eccentric block, a rotating shaft, fan blades, a bearing, an end cover, a junction box, a rotor iron core, a stator iron core, a machine base, a ventilation cap and a sealing cover, the fan blades are installed on the vibration motor, the fan blades are driven by the motor to rotate to carry wind, heat dissipation and cooling can be conducted on the bearing in time, and temperature rise of the bearing is prevented from being too fast and too high; the problem that the service life of the vibration motor is affected due to poor heat dissipation is solved, and the problem that the vibration motor is not suitable for being matched with the frequency converter due to heat dissipation is solved. The invention discloses a novel air-cooled vibration motor which is simple in structure, low in energy consumption, low in production cost, long in service life, safer and more reliable, reduces maintenance amount and belongs to the technical field of vibration equipment.

The present invention relates to a pre-evaporator for a low-temperature hydrofining process of coking crude benzene, comprising a lower tube box, a heat exchange device and an upper tube box, characterized in that the lower tube box, the heat exchange device and the upper tube box are arranged in sequence from bottom to top, and are fastened by flange connection. The beneficial effect is that the device of the invention adopts an improved vertical fixed tube sheet heat exchanger, which can solve the problem that the tube side is easy to be blocked and the shell side is easy to crystallize ammonium salt due to the excessively fast temperature rise in the heat exchanger when the existing conventional cooler is directly used in the production of the low-temperature hydrofining process of coking crude benzene, and the production process is smooth and the heat exchange efficiency is high.

The invention provides clothes treatment equipment and a drying control method of the clothes treatment equipment, and belongs to the field of clothes treatment equipment. The clothes treatment equipment comprises a heat pump assembly used for heating air flow in a drying air duct, a spraying device is controlled to spray an evaporator in the heat pump assembly, and meanwhile, by combining switching of a bypass air duct, a refrigerant in the evaporator can be fully subjected to heat exchange with spraying water, heat in the spraying water is absorbed, and the heat exchange efficiency is improved. Therefore, the temperature of the refrigerant entering the compressor is increased, the temperature rise speed of the heat pump assembly during operation can be rapidly increased, the drying time is shortened, and the clothes drying effect is improved.

The present invention belongs to the technical field of suture production, and in particular, relates to an integrated injection molding device for medical sutures with barbs, including a softening component, a cutting component, and a shaping component, etc. The softening component is used to soften a flat wire, the cutting component is used to stagger barbs on both sides of the softened flat wire, and the shaping component is used to round and shape the flat wire that has been processed with barbs. The present invention heats and softens the flat wire by the softening component, so that the cutter in the cutting component is more likely to cut barbs on the wire, and the strength requirements of the cutter are relatively low. At the same time, because the cutter cuts and processes barbs on the softened wire, the first electric push rod that drives the cutter only needs to consume less electricity and provide less power to achieve effective cutting of the wire by the cutter, thereby minimizing the volume of the first electric push rod as a driving structure, and effectively reducing the equipment cost on the basis of ensuring the demand.

The utility model relates to the field of fuses, in particular to a melt structure of a high-speed fuse, which comprises a metal fuse piece. A V-shaped groove is bent at the center of the metal fuse piece along the long edge direction, and the metal fuse piece is filled with a tin bar in the V-shaped groove; a plurality of groups of row holes are formed in the metal fuse piece at intervals along the length direction of the metal fuse piece, the V-shaped groove and the tin bar are positioned between two groups of row holes in the middle, and a narrow diameter is formed between adjacent holes of each group of row holes; the aperture of the two groups of row holes located in the middle is larger than the aperture of the other groups of row holes, the outer sides of the two groups of row holes located in the middle are respectively provided with two insulating rubber strips, and the insulating rubber strips are fixedly connected with the metal fuse piece. According to the fuse structure, rapid fusing can also be realized for small-multiple overload current, and a relatively strong circuit protection effect is achieved.

The invention discloses a ZSM-5 molecular sieve, a catalyst for preparing ethylbenzene through benzene alkylation and preparation and application of the catalyst. According to the ZSM-5 molecular sieve, the b-axis thickness is 30-100 nm, and the exposure degree of a crystal face perpendicular to the b-axis direction is 65%-75%. When the catalyst prepared from the ZSM-5 molecular sieve and used for preparing ethylbenzene through benzene alkylation is used for a reaction for preparing ethylbenzene through benzene alkylation, the ethylene conversion rate is high, the selectivity of ethyl in an alkylated product is high, and the mass content of key impurity dimethylbenzene is low.

The utility model relates to a kitchen electric appliance, in particular to a soybean milk machine, which comprises a machine head, the machine head comprises a machine head lower cover, a motor component arranged in the machine head lower cover and a heating pipe positioned below the motor component, and is characterized in that the motor component is deviated from the central line of the machine head lower cover; a receding space is formed between the inner wall of the side, away from the motor assembly, of the machine head lower cover and the motor assembly, a vertical wiring end is arranged at the end of the heating pipe, and the wiring end upwards stretches into the receding space. The motor assembly and the machine head lower cover are arranged in an offset mode, the avoiding space for containing the wiring end of the heating pipe is formed in the machine head lower cover, the distance between the motor assembly and the wiring end is increased, and the electric leakage risk caused by interference between the motor and the wiring end when the motor works is avoided.

The present invention relates to the technical field of cooling towers, and in particular to a wet cooling tower with a meniscus-shaped filler and its application. It comprises: a tower, a central shaft and a curved filler area; the central shaft is located at the center of the tower, the filler area is located between the tower and the central shaft, and the filler area is divided into a "meniscus-shaped" filler area and a filler area outside the "meniscus"; the thickness of the "meniscus-shaped" filler area is greater than the thickness of the filler area outside the "meniscus"; the "meniscus-shaped" filler area is located in the "meniscus-shaped" high water temperature area caused by the side wind. The present invention is aimed at the operating conditions of the cooling tower under the side wind, takes into account the "meniscus" performance deterioration area caused by the two factors of the cooling tower's own structure and the external side wind, and proposes a technical concept of "meniscus" non-equal height arrangement of fillers. The air-water contact time of the "meniscus-shaped" filler area of ​​the cooling tower using the present invention becomes longer, the circulating water temperature drop in this area is increased, and the cooling performance is enhanced.

This invention provides a microwave roasting equipment and process flow for iron extraction from red mud, relating to the field of red mud iron extraction technology. It includes a fixed base frame with a rotary kiln mounted on top. The rotary kiln comprises a furnace shell, furnace tubes, a discharge end pipe, a feeding assembly, a preheating assembly, a retention assembly, and a drive assembly. By incorporating the preheating and retention assemblies, this invention achieves effective preheating of the red mud particles, reducing the energy consumption required for roasting. Simultaneously, the retention assembly ensures uniform microwave action on the red mud particles, effectively improving the heating and roasting efficiency. The combined effect significantly reduces energy consumption during red mud roasting, and through this novel red mud iron extraction process, the iron grade of the obtained iron concentrate is greatly improved.

The application discloses a liquid cooling cable, comprising an inner support pipe, an outer support pipe sleeved outside the inner support pipe, and at least one support connecting piece arranged between the inner support pipe and the outer support pipe, wherein the support connecting piece divides the space between the inner support pipe and the outer support pipe into at least one first cavity, at least one conductor is arranged in the first cavity, and cooling liquid flows in the inner support pipe and the at least one first cavity. According to the liquid cooling cable, the cooling liquid flows in the inner support pipe and the first cavity, so that the heat of the conductor arranged in the first cavity can be quickly taken away, the heat generated by the conductor during charging is effectively reduced, the service life of the cable is prolonged, and the current carrying capacity of the conductor is improved.

The present invention discloses a compressor control method, device and multi-module unit of a multi-module unit. The multi-module unit includes at least one refrigerant system, each refrigerant system includes at least one compressor, and the method includes: monitoring the actual outlet water temperature and the water temperature change rate of the multi-module unit; according to the actual outlet water temperature and the water temperature change rate, controlling the number of compressors turned on and the operating frequency, so that the actual outlet water temperature is within the required temperature range and the compressors turned on are operated at the preset optimal frequency to the greatest extent, and the optimal frequency makes the compressor operate at the highest efficiency. When the load demand is large, the present invention can directly start a corresponding number of compressors instead of starting them one by one, so as to quickly respond to the load demand, achieve rapid temperature rise or temperature drop, and reduce loading and unloading time; set the optimal frequency, so that the compressor runs as close to the optimal frequency as possible, give full play to the efficiency of the compressor, improve the operating efficiency of the unit to a certain extent, and improve the energy efficiency of the whole machine.

The invention relates to the field of motors, in particular to a closed motor with internal and external cooling air paths, which comprises a shell of which the inner wall is uniformly provided with a plurality of magnetic poles, an end cover fixed at one end of the shell, and a rotor of which the two ends respectively penetrate through and are rotationally connected to the centers of the shell and the end cover, each air channel corresponds to a gap between two adjacent magnetic poles, the air channels are communicated with the gaps at the ends away from the end cover, the end cover is provided with a rotating channel communicated with the multiple air channels, and fan blades I are fixed to the position, close to the end cover, of the rotor. And a cavity tube is sleeved on the shell. A plurality of cooling fins are evenly arranged on the outer side of the cavity pipe. Two side lug pipes are symmetrically arranged on the cavity pipe, communicating pipes are arranged at the two ends of the end cover, the two communicating pipes are in butt joint communication with the two side lug pipes respectively, inner cavity plates are fixed to the ends, away from the side lug pipes, of the two communicating pipes, and spiral frames are rotationally arranged in the two communicating pipes. The motor can effectively dissipate heat, and the temperature rise of the motor is prevented from being too high.

The utility model discloses a motor, including the pivot, the casing and the refrigeration pipe, the refrigeration piece and the heat conduction plate of inside and outside setting in the pivot and the casing between in proper order, the refrigeration pipe is around the outer periphery of the pivot, the two sides of refrigeration piece are equipped with refrigeration surface and the heat releasing surface respectively, and the refrigeration surface is opposite with the refrigeration pipe, and the heat releasing surface is contacted with the heat conduction plate, and the casing is fixed with a plurality of radiating fins. The pivot exchanges heat with the refrigerant in the refrigeration pipe, and the heat of the refrigerant after heat exchange is absorbed by the refrigeration surface of the refrigeration piece, realizing cooling to the pivot, the heat of the heat releasing surface of the refrigeration piece is conducted to the casing outside through the heat conduction plate and the radiating fin in proper order, avoiding temperature rise in the casing too high, so can reduce the risk of thermal deformation of the pivot due to high temperature, reduce the frequency of motor failure, effectively provide the working reliability of motor.

The present invention relates to the technical field of new energy battery manufacturing, and specifically to a method and device for heating a battery cell. The battery cell heating device is used to operate according to the following steps: S1, electrically connecting the positive and negative electrodes of the battery cell to corresponding wiring terminals of a variable frequency power supply respectively; S2, applying an alternating current I or an alternating voltage U of a certain magnitude and frequency to the two electrodes of the battery cell through the variable frequency power supply, and heating the battery cell to a set temperature T; S3, vacuuming the battery cell and / or the sealed cavity where the battery cell is located, filling it with dry gas, or vacuuming and filling it with dry gas in a cyclic switching manner, and maintaining a certain air pressure value P in the battery cell and / or the sealed cavity where the battery cell is located; S4, after the battery cell reaches the set temperature T, keeping it warm for a period of time t; S5, after the battery cell is heated, cooling the battery cell and / or the sealed cavity where the battery cell is located and / or the wiring terminals of the variable frequency power supply; the efficiency of heating the battery cell is improved, the loss is reduced, and the identification of defective battery cells is realized simultaneously.

This invention provides a high-efficiency, low-temperature-rise passive harmonic filter, belonging to the field of filters. It includes a main base housing and a top housing with evenly spaced heat dissipation side slots on both sides, which work in conjunction with symmetrically fixed cooling fans on the inner side to form an effective airflow channel. The cooling fans draw external cool air into the top housing, accelerating airflow and allowing heat to be quickly dissipated to the external environment, significantly improving heat dissipation efficiency. The evenly fixed heat dissipation side plates on the outer side of the passive harmonic filter further increase the heat dissipation area, while the porous structure of the perforated support plate also facilitates airflow and enhances the heat dissipation effect. Through these heat dissipation designs, the temperature rise of the filter during operation is effectively reduced, ensuring that the internal electronic components operate in a suitable temperature environment, improving component performance and lifespan, reducing the failure rate caused by overheating, and improving the reliability and stability of the filter.

The application discloses a kind of air supply equipment and gas water heater, it is related to water heater technical field.The air supply equipment includes volute, air supply wheel, motor and heat insulating material piece;Volute is equipped with fan flow channel;Air supply wheel is located in fan flow channel;Motor includes the motor body and motor shaft connected, motor body is located in the side of volute, motor shaft is inserted into fan flow channel, and is transmissionally connected with air supply wheel;Heat insulating material piece is located between motor body and volute, heat insulating material piece is configured to block the heat transfer in fan flow channel to motor body.The technical scheme of the application can prevent motor temperature rise too high, and solve the problem of motor performance decline simultaneously.

The invention relates to the technical field of heat transfer printing, and discloses a flexible heating plate for heat transfer printing, which comprises a heat conduction aluminum plate, the top of the heat conduction aluminum plate is sequentially provided with a heating pad, heat insulation cotton and an inner shell, the bottom of the inner shell is provided with a packaging sleeve, and the heat conduction aluminum plate, the heating pad and the heat insulation cotton are all located in the packaging sleeve. According to the invention, due to the design of the heat conduction aluminum plate and the heating pad, the heat insulation cotton is extruded and deformed under pressure, so that the flexible heating plate can automatically adapt to and coincide with an uneven working surface, thereby ensuring that the temperature distribution in the heating process is more uniform; the temperature control difference caused by the uneven surface of the product or the workbench is avoided, and the heat transfer printing quality is improved.

A full-tooth-height super-large-modulus straight gear forge piece comprises a half-tooth-height step and full-tooth-height steps, and the thickness of the half-tooth-height step is not smaller than the height of a transition arc between every two adjacent full-tooth-height steps. The difference value between the tooth profile contour line of the full-tooth-height super-large-modulus gear forge piece of the full-tooth-height step and the tooth profile contour line of the machined super-large-modulus gear part is uniform, and the tooth profile metal streamlines of the full-tooth-height step are continuously distributed along the tooth profile contour; an upper tooth-shaped punch of the forming device is connected with an upper sliding block of a pressing machine through a switching mechanism, the upper tooth-shaped punch is used for extruding a metal blank in a lower die assembly, and in the extrusion process, forging preparation is achieved through left-right movement of a left die assembly and a right die assembly which are symmetrically arranged. According to the forged piece manufactured through the method, after machining, it can be guaranteed that a metal flow line is distributed along the profile of a part, the metal flow line is basically free of cutting and outcrop phenomena, the strength of the gear is well improved, and the requirements for high-load large-modulus gears in the fields of engineering machinery, ocean equipment and aerospace equipment can be met.

The lubricating oil directional distribution device and reducer provided by the present invention, the lubricating oil directional distribution device includes an oil stirring mechanism and an oil collecting mechanism, the oil stirring mechanism includes a housing and a gear rotatably arranged on the housing, the oil collecting mechanism includes an oil collecting structure, an oil inlet opened on one side of the oil collecting structure and an oil distribution structure arranged on the bottom surface of the oil collecting structure, the oil inlet is used to provide an oil inlet channel for the lubricating oil splashed out by the rotation of the gear to enter the oil collecting cavity of the oil collecting mechanism, and the oil distribution structure is used to transport the collected lubricating oil to the gear. The lubricating oil directional distribution device collects the lubricating oil splashed out by the rotation of the gear through the oil collecting mechanism, and distributes the collected lubricating oil to the gear through the oil distribution structure, which plays the role of recycling the lubricating oil and reducing the oil stirring loss when the gear rotates, and at the same time effectively avoids excessive temperature rise of the reducer system, improves the transmission efficiency and the service life of the reducer.

The utility model belongs to the technical field of vacuum pumps, and discloses a heat dissipation device and vacuum obtaining equipment. The heat dissipation device comprises a first heat dissipation assembly and a second heat dissipation assembly, the first heat dissipation assembly comprises a box body, cooling liquid is contained in the box body, the second heat dissipation assembly comprises a cold source and a liquid cooling plate, an inlet and an outlet of the liquid cooling plate are both communicated with the cold source, the cold source is used for providing the cooling liquid for the liquid cooling plate, and the liquid cooling plate is installed in the box body. The to-be-cooled part is fixed on the liquid cooling plate, and the cooling liquid circularly flowing in the liquid cooling plate can cool the to-be-cooled part. Meanwhile, the liquid cooling plate and part of the to-be-cooled part are both in contact with the cooling liquid in the box body, the cooling liquid in the box body further conducts heat dissipation on the to-be-cooled part, and double heat dissipation of the to-be-cooled part is achieved. In addition, the liquid cooling plate can cool the cooling liquid in the box body. The vacuum obtaining equipment adopts the heat dissipation device to dissipate heat of the vacuum pump, so that the stability of the vacuumizing performance of the vacuum pump is improved, and the service life of the vacuum pump is prolonged.

The present invention discloses a hybrid energy storage system and a self-heating method with a low-temperature self-heating function. The hybrid energy storage system includes a battery and a supercapacitor connected in parallel on a bus, and the battery and the supercapacitor are connected in parallel through a bidirectional DC / DC converter, so that the battery and the supercapacitor can be charged and discharged with each other to complete the low-temperature self-heating of the battery. The present invention is applied to the field of hybrid energy storage technology, with the battery as an energy device of the hybrid energy storage system and the supercapacitor as a power device of the hybrid energy storage system. The bidirectional DC / DC converter can be controlled by pulse width modulation to enable high-frequency mutual charging and discharging between the battery and the supercapacitor to achieve low-temperature self-heating of the battery. It has the characteristics of fast temperature rise rate and high energy efficiency, and is suitable for the inherent configuration of the hybrid energy storage system, without the need to specially integrate other heating devices or dedicated circuits, so it also has the advantages of low cost and ease of use.

The invention provides an underground electromagnetic heating device and a heating method thereof. The heating device comprises an oil-string casing, a metal pipe, an oil pipe and an electromagnetic generation column connected with an external power supply, the end of the oil-string casing extends into the stratum and is connected with one end of the metal pipe in a sleeved mode, and the other end of the metal pipe extends into an oil layer. One end of the oil pipe is sleeved with the oil-string casing, the other end of the oil pipe extends into the metal pipe and is connected with one end of the electromagnetic generation column, and the electromagnetic generation column extends into the metal pipe and is kept coaxial with the metal pipe. According to the underground electromagnetic heating device, the electromagnetic field with the two-pole connecting line collinear with the axis of the metal pipe is formed through the electromagnetic generation column, so that eddy current is generated on the metal pipe, the eddy current can generate heat in the flowing process on the metal pipe, and heating operation on an interval oil layer at the corresponding position of the metal pipe is achieved; and the electromagnetic generation column is classified into a plurality of electromagnetic column body parts and connecting column body parts, so that the selective heating effect is achieved.

The utility model discloses a quartz heating tube sealing structure which comprises a quartz heating tube, a heating device is arranged on the outer wall of the quartz heating tube, and sealing structures are arranged at the two ends of the quartz heating tube. The sealing structure comprises a sealing plug, a base and a cover plate; the sealing plug is arranged at the tail end of the quartz heating pipe, and the outer wall of the sealing plug is sleeved with a cover plate. The utility model relates to the technical field of quartz heating tubes, and solves the problems of low heat transfer efficiency, high energy consumption and difficulty in adapting to the market requirements of high temperature rise and high flow rate in the current heating mode that a heating wire is wrapped in a PFA (Polyfluoroalkoxy) tube.