58 results about "Insulation Problem" patented technology

The invention provides a lithium iron phosphate battery insulation detection system, which is applied to the technical field of new energy batteries, and can provide accurate insulation resistance readings by using a high-precision current detection device and a fine resistance measurement module, thereby improving the evaluation precision of the battery insulation performance. The software algorithm module analyzes the measurement data of the insulation resistance by using a time sequence analysis and statistical model, so that the abnormal change of the insulation performance of the battery can be recognized in an early stage, and the possibility is provided for timely maintenance and fault prevention; by setting a threshold parameter and a detection window, a software algorithm can identify and mark intermittent insulation problems which may be neglected in a conventional test, so that the reliability and the safety of the system are improved; a built-in historical database of the system provides data support for long-term trend analysis and performance monitoring, more accurate maintenance decision making based on data is facilitated, the service life of the battery is prolonged, and the performance of the battery is improved.

The invention discloses a power cable insulation state detection system based on ultralow frequency dielectric loss. The system comprises an excitation signal generation module, a signal acquisition and conversion module, a data processing and analysis module, an insulation state evaluation module, a database storage module and a man-machine interaction module. The signal acquisition and conversion module acquires output voltage and current signals and converts analog signals into digital signals; the data processing and analysis module processes signals based on a system identification theory, establishes an equivalent mathematical model, analyzes data, calculates dielectric parameters and provides a basis for evaluation; the insulation state evaluation module combines historical data with a standard threshold value, designs an evaluation algorithm, analyzes dielectric parameter changes, judges the cable insulation problem, sets a parameter alarm mechanism and automatically gives an alarm when the threshold value is exceeded; according to the method, the detection process is optimized based on the identification theory, ultralow frequency key frequency points are covered, the result precision is ensured through mathematical modeling and analysis, the test time is effectively shortened, and the test result accuracy is high.

The invention provides an insulation on-line monitoring system and method of a direct current power supply system, and solves the technical problem that the existing monitoring means is not suitable for the direct current power supply system. The system comprises a bridge type insulation detector used for timely detecting the insulation resistance value of the high-voltage DC bus and feeding back the insulation resistance value; the leakage current sensor is used for detecting the insulation resistance value of the high-voltage direct-current branch in real time and feeding back the insulation resistance value; and the injection type insulation detector is used for detecting the insulation resistance value of the low-voltage direct-current bus in real time and feeding back the insulation resistance value. An appropriate direct-current power supply system insulation on-line monitoring method is designed through analysis from the aspects of electrical architecture, voltage class, insulation abnormity rapid positioning and the like of the direct-current power supply system, the insulation problem is rapidly positioned, and a high-precision insulation monitoring scheme is achieved. Insulation abnormal conditions of various levels of electrical systems can be found in time, and the safety of personnel and electrical equipment is fully guaranteed.

The utility model relates to the technical field of motors, in particular to a direct-current motor with ceramic heat insulation, which comprises a motor body, a heat insulation assembly is sleeved outside the motor body and comprises a heat insulation cylinder, the heat insulation cylinder is provided with an accommodating cavity for placing the motor body, and a fixed cover is mounted at the front end of the heat insulation cylinder in a threaded manner. A communicating groove is formed in the middle of the fixing cover, mounting bases are symmetrically mounted on the upper surface of the fixing cover, supporting assemblies are mounted on the two sides of the fixing cover in an inserted mode, and fixing assemblies are fixedly mounted on the upper surfaces of the mounting bases. Through the use of the ceramic heat insulation cylinder, the heat dissipation and heat insulation problems in the operation of the motor are effectively solved, the operation efficiency and stability of the motor are improved, the design of the concave-convex rings can increase the surface area of the inner wall of the heat insulation cylinder, so that the heat absorption and dispersion capability of the heat insulation cylinder is enhanced, and through the fine structural design, the service life of the motor is prolonged. The whole motor is firm, durable and easy to install and maintain, and is suitable for occasions sensitive to temperature or requiring long-time stable operation.

The utility model discloses a plastic cover plate and a cathode insulation structure of a battery, the side edge of the plastic cover plate is provided with a bending part which is folded upwards and a blocking part which is positioned on the side surface of the plastic cover plate, the blocking part is vertical to the bending part when the plastic cover plate is welded with an adapter plate, and after the plastic cover plate is welded with the adapter plate, the blocking part is vertical to the bending part. And the bending part is folded upwards and is matched with the blocking part to form a space for accommodating the switching piece, so that the switching piece is isolated from the shell through the plastic cover plate. According to the utility model, the bending part and the blocking part are arranged on the plastic cover plate and are matched with each other to effectively isolate the switching piece, so that the problem of poor insulation caused by contact between the switching piece and the shell is avoided, and the safety and the reliability of the battery are improved.

The invention provides an intermediate tank sealing cover, a heat preservation assembly and a method, and relates to the technical field of slag treatment equipment.The intermediate tank sealing cover comprises a supporting structure, a cover body structure and a driving mechanism, and a turnover mechanism is arranged on the supporting structure; the cover body structure comprises a supporting beam connected with the turnover mechanism, a top cover arranged on the supporting beam and a skirt cover arranged on the top cover, a heat insulation structure and a sealing structure are arranged on the top cover, the top cover can be used for covering the self-heat-preservation intermediate tank, and the sealing structure can be used for sealing the top cover and the self-heat-preservation intermediate tank; the driving mechanism is arranged on the supporting structure and connected with the turnover mechanism, and the driving mechanism is used for driving the turnover mechanism to drive the cover body structure to turn over. Aiming at the heat preservation problem in the air quenching method treatment process, the heat preservation problem of the molten slag is solved, the requirement of the air quenching method for the fluidity of the molten electric slag is effectively guaranteed, and an important technical support is provided for improving the treatment efficiency of the air quenching method.

The invention discloses a novel platform door insulation threshold which comprises a surface insulation threshold body, the threshold body comprises a platform side threshold body and a rail side threshold body, a gap between the platform side threshold body and the rail side threshold body serves as a guide groove for operation of a sliding door guide shoe, and the sliding door guide shoe comprises a guide shoe mounting frame and sliding strips on the two sides. A clearance compensation device is arranged on the rear surface of the track side threshold and is formed by vulcanizing rubber and a lining steel plate; the positions where the two sides of the doorsill are connected with the stand columns are provided with stand column insulation blocks which isolate the doorsill from the stand columns, and the upper portion of the doorsill is provided with a door body and stand column wrapping edges which are subjected to surface insulation treatment. The insulation problem of the platform door threshold is solved in a surface insulation mode, the insulation effect is good, the threshold surface is high in anti-skid performance, the structure is simple, and maintenance is easy.

The utility model relates to motor protection technical field especially relates to a kind of prevent motor condensation structure, comprising: motor cavity, junction box cavity, stator phase outgoing line, junction box cavity is connected with motor cavity;Stator phase outgoing line one side is located in motor cavity, other side is located in junction box cavity inside.The utility model is used by upper rubber sleeve, lower rubber sleeve and sub-cavity rib plate cooperation, the upper and lower sealing isolation of stator phase outgoing line is completed, so that motor cavity and junction box cavity form two different cavities, form physical isolation, which in motor working process, air in motor cavity is blocked by isolation component and isolated, so that hot air cannot reach junction box cavity, complete heat convection inhibition, so that junction box cavity and motor outside temperature difference reduces, inside and outside temperature reaches relative balance, cannot reach the environmental conditions of generating condensate, prevent the appearance of condensation phenomenon, and then effectively avoid the insulation problem of poor in the high-voltage outgoing line, high-voltage terminal and other positions of motor.

The utility model discloses a PCB assembly and an electronic product, the PCB assembly comprises a PCB unit and an HSP isolation layer, and the HSP isolation layer covers the PCB unit. According to the scheme, the HSP isolation layer with a certain thickness covers the upper surface of the wiring or the copper foil layer on the PCB unit, the electronic component is isolated from the non-welding area at the bottom, the problem of isolation between the electronic component and the wiring of the PCB can be solved, meanwhile, due to the characteristics of the HSP isolation layer, the problem of insulation in the design process of the PCB can be solved, and the reliability of the PCB is improved. And the safety and the reliability of the PCB during application are ensured.

This utility model relates to the field of resistor technology, specifically to a resistor tube with overlapping wiring, comprising an insulated support tube and a resistor strip spirally wound around the support tube. The resistor strip is an exposed metal strip, comprising integrally formed, continuously bent, alternately bent main body segments and connecting segments. The main body segments maintain a straight shape due to their own strength, while the connecting segments are arc-shaped. Adjacent main body segments are connected via the connecting segments and arranged in a V-shape. Multiple positioning grooves are formed on the outer side of the support tube, and the middle of each main body segment overlaps and is embedded in the positioning grooves. The elasticity of the connecting segments clamps adjacent main body segments tightly against the support tube. Compared with existing technologies, the resistor strip is directly exposed to air for heat dissipation, resulting in higher power density. It eliminates the need for the outer shell and magnesium oxide insulating powder of existing load resistor tubes, reducing the influencing factors of insulation and failure issues. It eliminates the need to consider the high-temperature insulation failure of magnesium oxide powder and problems caused by shell corrosion.

The invention discloses a stator assembly and a motor. The stator assembly comprises an end plate which is provided with a first through hole and is configured to be connected with a housing; the laminated stator core is provided with a second through hole extending along the axial direction of the laminated stator core, and the end plate is arranged at the end part of the laminated stator core along the axial direction; the pull rod extends in the axial direction, part of the pull rod is located in the first through hole, and part of the pull rod is located in the second through hole; and at least part of the insulation sleeve is located in the second through hole, the pull rod is sleeved with the insulation sleeve, and the insulation sleeve is used for insulating the pull rod and the laminated stator iron core. In this way, the problem that the performance of the laminated stator core and the stator assembly is reduced due to stress and insulation problems can be solved.

The utility model discloses an insulation solid-sealed polar pole which comprises a polar pole body, a shielding piece and a circuit breaker assembly. A mounting surface for mounting and positioning is arranged on the outer side wall of the pole body, a mounting cavity penetrating in the axial direction is formed in the pole body, and a circuit breaker assembly is arranged in the mounting cavity; the shielding piece is arranged in the pole body, at least part of the shielding piece is arranged between the mounting surface and the circuit breaker assembly, and the shielding piece is used for isolating the mounting surface from the circuit breaker assembly. The insulation problem of the solid-sealed polar pole is solved.

The present application relates to the technical field of new energy, in particular to a fuel cell system insulation design and insulation fault diagnosis method, the insulation design method provides an insulation design basis in the development and design stage of the fuel cell system; and the insulation fault diagnosis method provides an insulation fault troubleshooting scheme of the fuel cell system, quickly locates the insulation fault reason of the fuel cell system, and the main purpose is to solve the insulation problem of the fuel cell system and improve the insulation performance of the fuel cell; by building an insulation model of the fuel cell system, the influence of each subcomponent and pipeline in the fuel cell system on the insulation performance of the system is analyzed, corresponding solutions are formulated for the key influencing factors through the influence analysis, so as to meet the insulation design requirements of the fuel cell system and analyze and locate the insulation fault of the system.

The utility model belongs to the technical field of rotor feeding, and particularly relates to an automatic rotor feeding warehouse structure which comprises a rack, an electric cabinet is arranged on the left side of the interior of the rack, a skip car is arranged in the middle of the interior of the rack, and a plurality of rotors are placed in the skip car. Two groups of buffer blocks and two groups of material box lead-in plates are fixedly mounted on the left side and the right side of the material trolley on the rack respectively, the rotor placed in the material trolley is adsorbed and taken through the material taking assembly mounted on the right side of the top of the rack, the adsorbed rotor is transferred to the detection assembly, and insulation detection is performed on the rotor through the detection assembly; therefore, potential insulation problems are found in time, the product quality is ensured, then the rotors are grabbed and moved to the next production line through the feeding assembly installed at the top of the rack, the whole process of the device is automatically controlled, automatic feeding of the rotors from a skip car to an assembly production line is achieved, meanwhile, the labor intensity of workers is reduced, and the production efficiency is improved.

The utility model relates to the technical field of batteries, in particular to a liquid cooling assembly and a battery system, the liquid cooling assembly comprises a liquid cooling plate provided with a cover plate and a flow channel plate, and the flow channel plate and the cover plate are buckled to form a liquid cooling flow channel; the coating is coated on the outer surface of the cover plate and / or the runner plate; the heat preservation coefficient of the coating is less than or equal to 0.04 W / (m.k); the corrosion resistance coefficient of the coating is acid / alkali resistant within 96 hours without performance degradation; the thickness of the coating ranges from 100 micrometers to 350 micrometers. The insulation coefficient of the coating is 4000 VDC, the duration time is 60 s, and the leakage current is smaller than or equal to 0.1 mA. After the liquid cooling plate is coated with the coating, the thickness of the liquid cooling plate ranges from 1 mm to 6 mm. According to the embodiment of the invention, the outer surface of the liquid cooling plate is coated with the coating, and the coating has insulating property and corrosion resistance at the same time, so that the insulating problem and the corrosion problem can be directly solved. And the thickness of the coating is obviously low, so that the space utilization rate in practical application can be improved.

The invention particularly relates to a heat-conducting gel gasket of a ceramic base material and a preparation method of the heat-conducting gel gasket. The heat-conducting gel gasket is prepared from the following raw materials in parts by weight: 3 to 20 parts of vinyl silicone oil, 0.01 to 1 part of treating agent, 60 to 95 parts of heat-conducting filler, 0.2 to 1.5 parts of hydrogen-containing silicone oil, 1 to 4 parts of synergist, 0.01 to 0.3 part of catalyst, 0.001 to 0.1 part of inhibitor and 0.01 to 0.1 part of coloring agent. The heat-conducting gel gasket is arranged on the surface of the ceramic wafer, so that a high-heat-conducting interface material coating with low hardness, low contact thermal resistance, insulation and high reliability can be formed on the surface of the ceramic wafer, the heat dissipation and insulation problems of the MOS transistor are effectively solved, the problems that heat-conducting silicone grease is difficult to operate and easy to dry can be effectively solved, and the heat-conducting gel gasket has high use value. The preparation method is simple in process, convenient to operate and control, high in production efficiency and beneficial to large-scale production.

The utility model relates to a circuit breaker, in particular to a vacuum circuit breaker for an outdoor high-salt-fog environment. The vacuum circuit breaker used in the outdoor high-salt-fog environment comprises a support, a rack is installed on the support, three sets of porcelain bushings are installed above the rack, an operation box is connected below the rack, and a CT19 spring operation mechanism is arranged in the operation box, and is characterized in that a lower wire outlet terminal and an upper wire outlet terminal are installed on the porcelain bushings, and a top cover is installed above the upper wire outlet terminal; an electronic moisture-proof box is arranged on the outer side of the operation box, baking varnish layers are arranged on the outer circumferential face and the crimping face of the upper wire outlet terminal, baking varnish layers are arranged on the outer circumferential face of the lower wire outlet terminal, and baking varnish layers are arranged on the upper end face and the outer circumferential face of the top cover. The utility model has the beneficial effects that the corrosion insulation problem of the circuit breaker in high salt mist and high humidity environments such as offshore wind power mainly using new energy such as wind power, photovoltaic and the like can be efficiently, reliably and thoroughly solved.

The present invention relates to the field of electrical equipment monitoring technology, and discloses an online insulation status monitoring system for high-voltage substation electrical equipment, comprising: a data acquisition module for collecting electric field strength, partial discharge signals, and temperature and humidity data in real time and transmitting them to various modules via a transmission unit; a multi-physics field coupling modeling module for calculating the electric field and temperature field distribution within the equipment through electric field simulation and temperature field simulation based on the electric field strength and temperature and humidity data; and a dielectric loss and partial discharge linkage analysis module. By combining multi-physics field coupling modeling with intelligent reasoning technology, a comprehensive analysis of electric field strength, partial discharge signals, and temperature and humidity data is performed, enabling accurate equipment insulation status assessment and fault prediction. Furthermore, the use of electric field-temperature field coupling analysis technology, combined with partial discharge and thermal effects, enables accurate identification of overheating areas and insulation problems within the equipment.

The invention provides a relay with a high-low voltage insulation structure, and relates to the technical field of relays. The high-voltage system comprises an upper armature and an insulating frame, and the upper armature and the insulating frame are fixedly arranged; the low-voltage system comprises a magnetic pole plate; and the fixing feet are respectively and fixedly connected with the insulating frame and the magnetic pole plate, and the fixing feet are made of metal materials. According to the relay with the high-low voltage insulation structure, the upper armature is fixed by the insulation frame, and the insulation between the upper armature and the magnetic pole plate is realized by the insulation frame, so that the insulation isolation between a high-voltage system and a low-voltage system is realized, and the insulation problem between the high-voltage system and the low-voltage system is solved. The insulating frame is fixedly connected with the magnetic pole plate through the metal fixing pins, and the metal fixing pins can realize higher connection strength with the magnetic pole plate, so that the connection effect between the insulating frame and the magnetic pole plate is ensured, and the connection firmness of the insulating frame and the upper armature in the use process of the relay is ensured.

The utility model belongs to the technical field of aftertreatment, and particularly relates to a heat insulation structure of a detachable V-shaped hoop for tail gas aftertreatment. The heat insulation structure comprises a first heat insulation cover and a second heat insulation cover, one ends of the first heat insulation cover and the second heat insulation cover are connected through a connecting shaft, and the other ends are movably connected through a support and a buckle. Heat insulation pasting cotton is pasted on the inner sides of the first heat insulation cover and the second heat insulation cover. The whole heat shield is of a metal ring structure, and the requirements for strength and attractiveness are met; a connecting shaft and a buckle are arranged, so that the V-shaped hoop is convenient to mount and dismount; the bolt avoiding cover is arranged and can be matched with a post-processed V-shaped hoop; cotton is attached to the inner layer, and the heat insulation performance is enhanced; the heat insulation problem of the V-shaped hoop of an existing post-treatment product can be solved, the advantages of being good in durability, attractive in appearance and the like are achieved, and meanwhile the cost and detachability of the hoop heat insulation cover can be considered.

The invention relates to the technical field of cable detection, in particular to a cable insulation state evaluation and early warning method based on transient traveling wave signal characteristics, which comprises the following steps of: distinguishing an internal fault and an external fault according to a fault distance and a high and low frequency energy difference of a transient traveling wave signal, and determining a preliminarily identified fault point in combination with a topological structure of a current to-be-detected cable; performing secondary region mapping on the fault points, integrating spatial positions of the fault points through direction information corresponding to transient traveling wave signals, and determining a fault region topological graph of the combination of the fault points; positioning a fault section corresponding to the current fault point according to the fault area topological graph data updated at any time; combining the identified fault section with the duration time, strength and frequency of fault occurrence, and evaluating the insulation problem grade of the corresponding fault section; and comparing the insulation problem grades of the fault sections under multiple analysis, and performing early warning according to the overlapping condition of the fault sections. Accuracy and efficiency of cable early warning are realized.

The invention discloses a device and a method for repairing an inner heat insulation layer of a fiber-wound solid rocket engine shell, relates to the field of composite shell repairing, and solves the problem of defects caused by discrete heat insulation forming process on the inner surface of the shell. A base is arranged at an opening in the bottom of a repairing shell, and a supporting shaft is arranged on the base; a rotating block is arranged on the supporting shaft, and a repairing arm and a supporting arm are arranged on the rotating block; the repairing arm comprises an unfolding rotating block, a pressurizing structure, a pressurizing plate and an end pressurizing arc plate; the other end of the unfolding rotating block is connected with the pressurizing structure; the pressurizing structure, the pressurizing plate and the end pressurizing arc plate are sequentially connected, and the end pressurizing arc plate is attached to the inner surface of the repairing shell; and a heater is arranged in the pressurizing plate. The method that axis positioning is adopted, and the mechanism can be unfolded and folded is adopted, and the device is suitable for mechanical pressurization and heating of a heat insulation layer with the heat insulation problem of a small-diameter open cylinder body section; and the requirements of cold and hot repair of the defects of the heat insulation layer in the solid rocket engine shell are met.

The invention discloses a transformer substation cable insulation monitoring method for realizing early warning. The method comprises the steps of deployment of a sensor network, sound signal analysis, abnormal sound analysis and evaluation, insulation hidden danger positioning, early warning, emergency and the like. According to the invention, through combination of various sensors and signal processing technologies, comprehensive monitoring of the insulation state of the transformer substation cable is realized, the accuracy and reliability of monitoring are improved, early signs of cable insulation problems can be captured in real time, sufficient time is provided for operation and maintenance personnel to carry out intervention and maintenance, and the operation and maintenance efficiency is improved. Therefore, potential electric power accidents are effectively avoided, safe and stable operation of a power grid is ensured, abnormal sound signals in cable operation can be accurately recognized through the sound sensor in the aspects of sound signal collection and analysis, deep analysis is conducted on the abnormal sound signals, and the accuracy of insulation problem detection is further improved.

The present application relates to the technical field of cable detection, in particular to a cable insulation state evaluation and early warning method based on transient traveling wave signal characteristics, comprising: distinguishing intra-zone faults and extra-zone faults according to the fault distance and the high-low frequency energy difference of the transient traveling wave signal, combining the topological structure of the current cable to be detected to determine the preliminary identified fault point; performing secondary regional mapping on the fault point, integrating the spatial position of each fault point through the direction information corresponding to the transient traveling wave signal to determine the fault region topological graph of each fault point combination; positioning the fault section corresponding to the current fault point according to the fault region topological graph data updated at any time; combining the identified fault section with the duration, intensity and frequency of fault occurrence to evaluate the insulation problem level of the corresponding fault section; comparing the insulation problem levels of the fault section under multiple analyses to perform early warning according to the coincidence of each fault section. The accuracy and efficiency of cable early warning are realized.

The invention discloses a power distribution system on-line insulation detection device, which comprises an insulation monitoring screen cabinet and a multi-pass isolation switch, and is characterized in that each group of buses is provided with a current decoupling photoelectric separation module and an insulation monitor, and the insulation monitoring screen cabinet is in signal connection with a cloud analysis system; when a certain bus is not insulated to the ground, the electrical cabinet connected with the corresponding bus is connected into the low-voltage induction current detection mechanism by using the multi-connection circuit on-off device, and electric appliances in the electrical cabinet are isolated one by one through the multi-pass isolation switch, so that one-by-one troubleshooting is realized, and the detection accuracy is improved. Therefore, the troubleshooting process is automatically started, and the power element which is not insulated to the ground is rapidly detected, so that the maintenance and detection period is shortened, the downtime is reduced, and the influence on production is reduced.

The application is suitable for the technical field of metallurgical industry, and provides an intermediate frequency furnace insulation detection device, which comprises: an intermediate frequency furnace induction coil, a power input end of which is electrically connected with an alternating current power supply, and a power output end of which is fixedly connected with a ground insulation resistance and connected with the ground; a detection circuit, which has: a current output device for stably outputting a detection direct current, a power output end of which is connected with the power input end of the intermediate frequency furnace induction coil, and a power input end of which is connected with the power output end of the intermediate frequency furnace induction coil; and a collection component for realizing insulation detection of the intermediate frequency furnace induction coil, adopting a direct current injection technology to detect ground insulation data of the furnace body, so that the insulation condition of the running equipment (the intermediate frequency furnace induction coil and the ground insulation resistance) can be timely mastered, and the safety operation of the intermediate frequency furnace is provided with protection and basis, and a major safety accident of turn-to-turn sparking of the intermediate frequency furnace induction coil and burning of the intermediate frequency furnace induction coil caused by insulation problems is avoided.

The invention discloses a low-thermal-conductivity thermal insulation coating for a vertical mill shell, and belongs to the technical field of thermal insulation coatings. Comprising the following raw materials in parts by weight: 61-73 parts of modified organic silicon resin, 18-26 parts of modified hollow glass beads, 10-15 parts of expanded vermiculite, 0.5-1 part of a defoaming agent, 3-5 parts of a curing agent and 20-30 parts of a solvent. Wherein the expansion particles and the modified hollow glass beads have a synergistic effect to form a multi-layer thermal barrier structure, so that heat conduction is effectively hindered, and the long-term thermal insulation stability of the coating is improved; wherein heat-resistant groups in the modified organic silicon resin and the modified hollow glass beads greatly improve the heat resistance of the coating, and after the hollow glass beads are modified, the compatibility of the hollow glass beads and a resin matrix is improved, filler agglomeration is avoided, and the uniformity and performance stability of the coating are ensured. Therefore, the coating prepared by the invention solves the problem of high-temperature heat insulation of the vertical mill shell, has heat resistance and low thermal conductivity, and has important application value in the technical field of heat insulation coatings.

The present disclosure provides a multi-layer coil structure, an inductor, and a method for manufacturing the multi-layer coil structure. The multi-layer coil structure includes subcoils arranged in a stacked manner, where each subcoil includes a bottom coil, an insulating film, and a top coil, a contact is arranged in a through hole of the insulating film, outer surfaces of the bottom coil and the top coil are both provided with an insulating layer, and the insulating layer is provided with a via hole; via holes in adjacent subcoils are aligned with each other, and metal contacts are arranged in the via holes. The problem of insulation in a multi-layer multi-turn coil is solved.

The present application relates to the technical field of vehicle detection, more particularly to an insulation inspection method for new energy electric vehicle, which comprises the following steps: step S1, the vehicle is segmented according to the high-voltage components of the new energy electric vehicle, an insulation inspection module is arranged for each segmented area, and the insulation state of the vehicle is detected; if the vehicle has insulation problems, step S2 is entered; step S2, the vehicle enters a degraded operation mode, the load is actively cut off, and whether the minimum operation capacity of the vehicle is met is judged; if the minimum operation capacity of the vehicle is not met, step S3 is entered; step S3, the vehicle enters an insulation inspection mode, and the insulation of each segmented area is detected in sequence by the insulation inspection module, so as to locate the fault position. The high-voltage components of the vehicle are segmented and detected synchronously, the insulation fault point can be quickly located, and the operation requirement of quick processing of the vehicle is met.

The utility model belongs to the field of reel heat insulation, and provides a reel heat insulation device with a torque radial supporting force requirement in hot rolling, which comprises a reel, a brake disc, a wedge block, a reel, a heat insulation sleeve, a pressing sleeve, a leading tape pressing plate, a ceramic block I, an arc pad, a wedge block pressing plate, a locking wedge block, a pressing block and a ceramic block II, in the hot rolling coiling furnace, the heat insulation sleeve is used for isolating the winding drum reel, so that the temperature of the reel is reduced, the operation of the bearing at normal temperature is ensured, and the service life of the bearing on the reel is prolonged. According to the utility model, the heat insulation material is adopted to replace a complex water cooling structure commonly used in the prior art, the heat insulation problem of the winding drum reel is solved, meanwhile, the requirements of high torque and high radial supporting force are met, the maintenance cost is reduced, and daily maintenance and overhaul are facilitated.