173results about How to "Reduced insulation performance" patented technology

The present invention relates to a radiofrequency electrode ablation catheter for ventricular septal therapy with a cooling function, which is used for performing radiofrequency electrode ablation and has a cooling function for preventing carbonization of body (ventricular septum) tissue around the electrode, wherein radiofrequency energy is applied to the ventricular septum during radiofrequency electrode ablation to perform ventricular septal therapy (e.g., therapy for hypertrophic cardiomyopathy, a disease in which the left ventricular septum of the heart of an animal or human body becomes thickened, therapy requiring reduction of the ventricular septum, or ventricular tachycardia, etc.). The radiofrequency catheter for ventricular septal therapy according to a preferred embodiment of the present invention includes a septal insertion portion and a body portion.

The invention relates to the technical field of insulators, and discloses an insulator assembly convenient to clean, comprising: a steel cap; the glass umbrella tray is arranged at the lower end of the steel cap, and a connecting cement block fixed with the steel cap is arranged on the glass umbrella tray; the steel foot is fixed on the lower surface of the glass umbrella tray so as to be matched with the other steel cap; the ceramic umbrella disc is rotationally mounted on the outer surface of the steel cap so as to shield the contact part of the glass umbrella disc and the steel cap; by arranging the ceramic umbrella tray, the first inlet, the second inlet, the outlet and the Tesla valve runner, dust and dirt can be well prevented from being accumulated, the cleaning effect of the glass umbrella tray is guaranteed, natural wind and water flow can be guided and accelerated, the cleaning effect on the upper surface of the glass umbrella tray is improved, and the service life of the glass umbrella tray is prolonged. By arranging a rubber block, a ceramic chip and an aluminum strip, the heat of the glass umbrella tray can be well improved, and the ice melting effect is achieved.

The invention relates to the technical field of motor protection devices, and discloses a novel mechatronics motor protection device which comprises a dehumidification assembly, the dehumidification assembly comprises a shell, and the bottom of the inner wall of the shell is fixedly connected with a first motor. The first motor can generate a large amount of heat during working, so that the temperature in the shell is high, due to the fact that the temperature of the U-shaped groove part is low, when hot air in the shell makes contact with the bottom of the U-shaped groove, the hot air is cooled, water vapor is condensed into water drops due to temperature reduction, and due to the fact that the second motor is started at the moment, the water vapor is cooled. A motor II drives a gear I to rotate through a rotating shaft, the gear I drives a reciprocating screw rod to rotate through a gear II, the reciprocating screw rod drives two water collecting grooves to reciprocate through a connecting plate, the water collecting grooves drive water scraping plates to scrape water drops condensed at the bottom of a U-shaped groove, and the scraped water drops fall into the water collecting grooves to be collected.

The invention relates to the technical field of transfer devices, and discloses a transformer insulation paper production transfer device which comprises a table, a conveying table is arranged at the top of the table, and a protection plate is fixedly connected to the top of the table. The rotating shaft rotates to drive the compression roller to rotate, so that the insulation paper which just rotates out of the rolling barrel can be leveled, the situation that the insulation paper is wrinkled and unsmooth in the transportation process in the subsequent production process is avoided, deflection or clamping stagnation of the insulation paper caused by unevenness of the insulation paper is emphatically reduced, the subsequent processing precision is improved, and the production efficiency is improved. And meanwhile, the first connecting plate moves upwards to drive the pressing plate to move upwards, so that the surface of the insulation paper can be further flattened, the flatness of the insulation paper in the transfer process can be improved, and the problem that the production efficiency is reduced due to uneven cutting in the follow-up link is solved.

The invention relates to the technical field of lightning protection circuit detection, in particular to a method and device for detecting the service life of a gas discharge tube, and the method comprises the steps: repeatedly calculating a plurality of performance loss characterization coefficients corresponding to each working condition time node of the gas discharge tube in a preset operation duration, and constructing a change curve of the fitting values of the performance loss characterization coefficients, determining a characteristic working condition time period according to the dispersion of the fitting value of the performance loss characterization coefficient of the plurality of working condition time nodes in each change curve section; and whether the performance of the gas discharge tube is abnormal or not is judged according to the change condition of the dispersion of the performance loss characterization coefficient fitting value in the characteristic working condition time period before and after the piezoresistor is switched on. Personalized sample data are established according to the environmental factor influence of the gas discharge tube and the change of the working condition of the circuit where the gas discharge tube is located, and scenarized operation state analysis is performed, so that the accuracy of performance life detection of the gas discharge tube is improved.

The invention discloses a connector with quick-plug and self-locking functions. The connector comprises a male connector; a first connecting cylinder is fixedly mounted on one side of the male connector, a contact pin is arranged in the first connecting cylinder, a second connecting cylinder sleeves one end of the first connecting cylinder, a second connecting cylinder is fixedly mounted at one end of the second connecting cylinder, and a jack is fixedly mounted at one end, close to the second connecting cylinder, of the female connector; a protection assembly is arranged on one side of the jack; through the arrangement of the protection assembly, the problems that when the connector is not used, the jacks are in an exposed state, fine dust in the environment easily enters the jacks and is attached to the inner walls of the jacks, the insulating performance of the connector is reduced, the failure rate of the connector is increased, the heat dissipation effect of the connecting position of the connector is reduced, the connector is easily overheated, and the service life of the connector is prolonged are solved. And therefore, the working efficiency of the connector can be improved, and the service life of the connector can be prolonged.

The invention belongs to the field of animal husbandry engineering, discloses a closed yak house convection ventilation structure, a regulation and control system and a regulation and control method, and is mainly used for solving the problems that the ventilation rate and the air quality are reduced due to excessive heat preservation of an existing yak house in winter, the yak body temperature is rapidly reduced due to direct blowing of cold air, and yak growth is affected. By arranging the air inlets and the air outlets which are staggered up and down, air flow in the breeding house body can effectively drive harmful gas and carbon dioxide in all layers of areas in the breeding house body to be exhausted, and the air quality in the breeding house is improved; the upper-inlet and lower-outlet air inlet and outlet device can effectively reduce loss of temperature in the breeding house and can prevent outdoor air from directly blowing to yak bodies, the comfort level of yaks is improved, meanwhile, heat consumption of the yaks is reduced, and the production efficiency of the yaks is guaranteed. In addition, the invention further provides a multi-method fusion yak house ventilation regulation and control system and method based on the heat balance method and the carbon dioxide balance method.

The utility model discloses a dustproof heat preservation double-layer cover for a tire vulcanizing device, which comprises a bottom plate, a supporting plate arranged on the outer wall of the top of the bottom plate and an electric sliding table arranged on the outer wall of one side of the supporting plate, and further comprises a shell arranged on a sliding piece of the electric sliding table, and a dust wiping assembly is arranged on the outer wall of the top of the shell. And a driving assembly is mounted on the inner wall of the top of the shell, and a partition plate is mounted on the inner wall of the shell. The shell can cover the outer part of the tire vulcanizing device, the heat preservation layer formed by the plurality of first heat preservation plates and the plurality of second heat preservation plates plays a heat preservation role on the tire vulcanizing device, the heat preservation effect is the best at the moment, and when the heat preservation effect is reduced to a certain degree according to the tire requirement or the environment temperature requirement, the heat preservation effect is good. The multiple first heat preservation plates can be driven to rotate at the same time through the driving assembly, the first heat preservation plates rotate to drive the two corresponding second heat preservation plates to rotate, a certain gap is formed between every two adjacent second heat preservation plates, and then the heat preservation effect is reduced.

The present invention belongs to the field of building construction technology, and in particular, relates to an integrated assembled composite floor with thermal insulation and sound insulation structure, including a floor body, the upper end of which is fixedly connected with a plurality of connectors distributed in a rectangular array, a hollow layer having a thermal insulation effect is provided inside the floor body, and ventilation steel pipes connected to the outside are embedded in the inner walls of both sides of the hollow layer; and an adjustment component is used to adjust the thermal insulation effect of the hollow layer according to the outside temperature. The present invention can adjust the ventilation rate of the ventilation steel pipe according to temperature changes by setting an adjustment component, thereby adjusting the thermal insulation effect by changing the air convection speed; by setting an adaptive sound insulation component, the electric field strength around the deformable sound absorbing member can be adjusted according to the sound pressure of the outside world, and the sound insulation effect can be adjusted by changing the deformation degree of the deformable sound absorbing member.

The utility model discloses a kind of air leakage prevention structures of lead-free glass sealing titanium cup, including container mechanism and detection mechanism, the container mechanism includes inner bag, cup cover of sleeve connection in the outer side of the inner bag, handle connected with the outer wall of the cup cover, screw cap is rotated with the top end of the inner bag, detection mechanism, the detection mechanism includes the heat preservation cavity formed between the inner bag and cup cover. In the utility model, once holder feels heat preservation duration, heat preservation effect reduces, holder can add a small amount of clean water in cambered surface position, then extrude push rod to the inside of cup cover, then rubber plug extrudes the air in heat preservation cavity, air surges along the outer wall of inner bag, then overflow from cup cover top air leakage position, overflow phenomenon specifically shows, air leakage position bubbles, then holder finds air leakage position, can be targeted for repair, avoid resources being wasted, and sustainable development environmental protection concept is combined.

The transformer device and the transformer equipment provided by the embodiments of the present disclosure include: a first insulating substrate having a groove; a magnetic core is contained in the groove, and the groove is filled with a resin material; an upper conductive trace structure includes a second insulating substrate, a first side of the upper conductive trace structure is formed with an upper conductive trace, and the first side of the upper conductive trace structure is adhered to a first side of the first insulating substrate through a first adhesive layer; a lower conductive trace structure includes a third insulating substrate, a first side of the lower conductive trace structure is formed with a lower conductive trace, and the first side of the lower conductive trace structure is adhered to a second side of the first insulating substrate through a second adhesive layer; a first via structure penetrates through the upper conductive trace structure, the lower conductive trace structure and the first insulating substrate, and a conductive material is arranged on a sidewall of the first insulating substrate exposed due to formation of the first via structure to form a first conductive via structure.

This sheet is provided with a heat-insulating layer and a pressure-sensitive adhesive layer, and the heat-insulating layer contains first hollow particles, which are thermally expandable organic hollow particles, second hollow particles, which are organic hollow particles other than the first hollow particles, and a matrix polymer.

The invention discloses a device and a method for rapidly detecting electrical property change of a cable during heating, and relates to the technical field of cable conductive parameter detection. According to the invention, high-voltage insulation performance testing is carried out through the insulation detection pasting plate and the inserted conductive column, and dynamic detection, regulation and control of the temperature rise of the cable are realized by combining the closed-loop resistor disc and the liquid flow pump. When the load of the cable rises or the temperature is abnormal, the system can give an early warning and reduce the load in time, thereby avoiding the damage of an insulating material and the short-circuit risk. And a material consistent with a cable insulation layer and a closed-loop design are adopted, so that the detection precision and reliability are improved.

The utility model relates to the technical field of wire wrapping machines, and discloses a paper-covered copper wire wrapping machine, which comprises a wrapping machine, the top surface of the wrapping machine is fixedly connected with a dustproof cover, and the bottom edge of the front surface of the dustproof cover is fixedly connected with a dustproof mechanism. According to the paper-covered copper wire wrapping machine, through the arrangement of the dustproof mechanism, when the paper-covered copper wire wrapping machine needs to be used, a moving window is pushed into deep grooves in the two sides in a sliding rail through pushing and pulling of a handle, the opening area is increased, after an internal copper wire is installed, the moving window is pulled out and folded, and then an internal machine can be isolated from the outside; the movable window is made of glass, so that the internal winding condition can be observed through the movable window, the effect of conveniently preventing dust from entering the device is achieved, and the problems that the dust settles on a paper-covered copper wire which is being wrapped, the uniformity and integrity of an insulating layer are damaged, the insulating performance is reduced, partial discharge is caused and the like are solved; the service life of equipment is shortened and potential safety hazards are increased.

The invention belongs to the technical field of air-water cooler motors, and relates to a dehumidification and moisture-proof structure of an air-water cooler motor. The interior of the structure cavity (1) is in a negative pressure state when the air-water cooler motor works, a cooler (19) is arranged in the cooler cavity (2), a cooler water collecting groove (4) is formed in the lower portion of the cooler cavity (2), a water accumulating tank (5) is arranged at the lowest position outside the motor cavity (3), and the water collecting groove (4) and the water accumulating tank (5) are communicated through a conveying pipeline (6). And a one-way valve (7) is arranged at one end, penetrating through the structural cavity (1) and extending into the water accumulation tank (5), of the conveying pipeline (6). According to the air-water cooler motor dehumidification and moisture-proof structure, the sealing condition of the motor and the air humidity in the motor cavity can be monitored in real time, dehumidification is effectively conducted according to different running and shutdown states of the motor, it is guaranteed that the dryness in the motor is improved, the moisture-proof effect is improved, and the influence on motor insulation is avoided; and the motor operation reliability in a humid environment is improved.

The invention provides an electromagnetic relay, which can restrain the enlargement of the electromagnetic relay and restrain the reduction of the insulating property between fixed terminals caused by wear powder accumulated in the electromagnetic relay. An electromagnetic relay includes a first fixed terminal, a second fixed terminal, a housing, a coil, and a spool. The second fixed terminal is disposed in front of the first fixed terminal so as to face the first fixed terminal. The housing includes a side surface covering the first fixed terminal and the second fixed terminal from a side. A coil is wound around the spool. The spool includes a support portion and a transverse wall portion. The support portion supports the first fixed terminal. The transverse wall portion extends from the support portion and is disposed between the first fixed terminal and the side surface of the housing in the left-right direction. The front end of the transverse wall portion is located between the first fixed terminal and the second fixed terminal in the front-back direction.

The invention relates to the technical field of batteries, and discloses a pole column and a forming process thereof, a battery cell cover plate assembly and a battery cell. The pole forming process comprises the following steps: stamping and blanking a conductive composite board along a Z direction to obtain a pole body; wherein the pole body comprises a first conductive section and a second conductive section; wrapping and limiting the first conductive section, and extruding and expanding the local part of one end, far away from the first conductive section, of the second conductive section along the Z direction, so that an annular flange is formed on the side wall of the second conductive section on the X-Y plane; stamping and stretching the local part of the annular flange to enable the free end of the annular flange to form a pole turnup; wherein the pole turnup comprises a first turnup and a second turnup which are connected with each other, the first turnup extends towards the direction far away from the second conductive section along the Z direction, the first turnup and the first conductive section are arranged at an interval, and the second turnup extends towards the direction far away from the first conductive section. The pole prepared by the invention can reduce heat transferred to the upper plastic, and the insulating property of the pole is guaranteed.

The invention relates to the technical field of heat energy storage, in particular to a low-liquid-level fused salt storage tank for a photo-thermal power station. A low-liquid-level device is arranged at the position, corresponding to the molten salt pump, of a bottom plate of the tank body, and the low-liquid-level device comprises an annular-groove-shaped connecting pipe assembly and an annular-groove-shaped sleeve. A main body of the connecting pipe assembly is embedded in the foundation, the end, provided with an opening, of the connecting pipe assembly is fixedly connected to the peripheral wall, provided with the through hole, of the bottom plate, so that a low-liquid-level area communicated with the interior of the tank body is formed in the groove of the connecting pipe assembly, and a suction pump shaft of the molten salt pump extends into the low-liquid-level area. The sleeve is arranged outside the pipe connecting assembly in a sleeving mode and fixed into the foundation in an embedded mode so that a space for the pipe connecting assembly to move can be formed between the sleeve and the pipe connecting assembly. According to the low-liquid-level fused salt storage tank, the technical problem of dead salt in a low-liquid-level area is solved on the premise that relative movement between the bottom of the storage tank and a foundation is not affected.

The graphite polystyrene foam board comprises a foam board body, water inlets are formed in the positions, close to the left side and the right side, of the outer walls of the upper end and the lower end of the foam board body respectively, and vertically-through water passing pipes a are arranged in the positions, close to the left side and the right side, of the interior of the foam board body respectively. Guide channels are arranged between the upper and lower ends of the two water passing pipes a and the water inlet to guide the flow direction of liquid, and by installing the water inlet, the guide channels and the water passing pipes b, the situations of moisture retention, mold breeding and mildewing caused by accumulation are avoided, and the situation that the indoor air quality is reduced due to mold is avoided; meanwhile, the situation that the foam board body is corroded due to the influence of mould can be avoided, the heat preservation and heat insulation performance of the foam board body on the wall is prevented from being reduced, and after liquid is guided, the later maintenance and repair cost can be reduced, and the service life of the foam board body is prolonged.

The utility model discloses an electric control box assembly and an air conditioner with the electric control box assembly, and the electric control box assembly comprises an electric control box which is provided with a wire outlet; the insect-proof pad is arranged in the wire outlet, the insect-proof pad is provided with a plurality of comb tooth parts, the comb tooth parts are arranged at intervals in the axial direction of the wire outlet, and each comb tooth part is provided with a plurality of wire clamping seams. According to the electric control box assembly provided by the utility model, the insect-proof pad is arranged in the wire outlet, the insect-proof pad is provided with the plurality of comb tooth parts, the comb tooth parts are provided with the plurality of wire clamping seams, a motor wire can be arranged in the wire clamping seams in a penetrating manner, and the comb tooth parts can block the notch at the wire outlet, so that the area of the notch at the wire outlet is reduced, and insects are prevented from entering the electric control box from the wire outlet; the hidden danger of short circuit can be reduced, insect body fluid is prevented from reducing the insulation performance of the circuit board, the performance of components in the electric control box is guaranteed, the failure of the components is avoided, the fire risk and the electric shock risk are reduced, the potential safety hazard is reduced, and the overall reliability, stability and safety of the electric control box assembly are improved.

A sealing material for a power storage device is provided with a base material layer, a barrier layer, an adhesive layer, and a sealant layer in this order. In the sealing material for a power storage device, the adhesive layer is a thermally adhesive resin layer or an adhesive layer, and when the adhesive layer is the thermally adhesive resin layer, the hydrogen sulfide transmission coefficient of a laminate of the thermally adhesive resin layer and the sealing layer is 1.1 * 10 <-9 > cc * mm / cm2 * sec * cmHg or more and less than 1.0 * 10 <-8 > cc * mm / cm2 * sec * cmHg, and the hydrogen sulfide transmission coefficient is 0.1 * 10 <-8 > cc * mm / cm2 * sec * cmHg or more and less than 1.0 * 10 <-8 > cc * mm / cm2 * sec * cmHg or more and less than 1.0 * 10 <-8 > cc * mm / cm2 * sec * cmHg. When the adhesive layer is the adhesive layer, the hydrogen sulfide transmission coefficient of the sealing layer is at least 1.1 * 10 <-9 > cc * mm / cm < 2 > * sec * cm < Hg > and less than 1.0 * 10 <-8 > cc * mm / cm < 2 > * sec * cm < Hg >.

The invention discloses an insulator for a direct current converter transformer and an online monitoring method thereof, and relates to the technical field of insulators. According to the insulator for the direct current converter transformer, the insulator body and the connection structure are internally integrated with a multi-stage state monitoring system comprising a first-stage sensing unit, a second-stage sensing unit and a third-stage sensing unit; according to the invention, three types of key state data of internal mechanical stress of the insulator, the connection state of the first metal accessory and the second metal accessory and the overall temperature distribution can be synchronously acquired in real time, real-time monitoring of the insulator and multi-dimensional comprehensive information acquisition are realized, early warning is realized based on the multi-dimensional comprehensive information, and the reliability of the insulator is improved. According to the method, preliminary early warning can be carried out according to single data, meanwhile, time-space alignment and comprehensive judgment can be carried out on multi-dimensional data, high-level fault early warning is carried out, the stability and reliability of the insulator are improved, and sudden faults are reduced.

The invention relates to a thermal insulation composite fabric and a production process thereof, belonging to the technical field of functional fabrics. The thermal insulation composite fabric is composited with a densely woven base fabric and a thermal insulation adhesive. The thermal insulation adhesive uses aerogel micropowder as thermal insulation particles, is modified by introducing epoxy groups through a silane coupling agent KH560, is ring-opened by 2-(1-methylethyl)-3-oxazoline ethanol and epoxy groups, introduces oxazolidine structures on the surfaces of aerogel microparticles, and synthesizes a polyurethane prepolymer containing a polyether segment from polyether diol and diisocyanate as an adhesive material. During the fumigation curing process, the polyether segment is hydrophilic and preferentially infiltrated and diffused, and the oxazolidine structure on the surface of the modified aerogel powder is promoted to hydrolyze, expose active amine groups and hydroxyl groups, and promote the cross-linking of isocyanate in the prepolymer in the near-surface layer of the modified aerogel powder, so that the aerogel microparticles are uniformly fixed with the polyether segment of the prepolymer as a template, and are segmented in the adhesive layer to form intricate and tortuous heat conduction channels, thereby increasing the thermal resistance of the adhesive layer and having a good thermal insulation effect.

Provided are: a heat transfer suppressing sheet which has excellent heat insulation properties and is capable of preventing the penetration of moisture, thereby being capable of preventing fire or the like due to short-circuiting between battery cells, and preferably, being capable of preventing a decrease in heat insulation properties due to the penetration of an electrolyte solution; a heat transfer suppressing sheet (10) interposed between a plurality of battery cells includes: at least one type of fiber (glass fiber (1)) selected from inorganic fibers and organic fibers; and a liquid-repellent substance (2) having a surface tension smaller than the surface tension of water.

The invention relates to the technical field of kitchen utensils, in particular to multifunctional foldable cooking equipment which comprises a base and a cover rotationally arranged on the base, a first heating assembly and a second heating assembly are arranged on the cover, a third heating assembly is arranged on the base, and the multifunctional foldable cooking equipment further comprises one or more cooking utensils for containing food; when the cover body is overturned and folded to the position above the base, a cooking cavity is formed between the cover body and the base, the third heating assembly heats food in the cooking cavity, the cooking utensil can be placed above the cover body, and the second heating assembly can cook the food in the cooking utensil. When the cover body is unfolded and is perpendicular to the base, the cooking utensil can be placed on the base, and food in the cooking utensil is heated by the first heating assembly; when the cover body is unfolded on one side of the base, the first heating assembly is arranged upwards, the cooking utensil can be placed above the first heating assembly, the effect that one machine has multiple purposes can be achieved, and the cooking equipment can better meet the cooking requirement of a user.

The invention discloses a high-strength alumina-based porcelain insulator, comprising an alumina-based porcelain body, wherein the raw materials of the alumina-based porcelain body include: industrial alumina powder, reinforcing powder, Anyuan clay, potassium feldspar, titanium dioxide, boric acid, phosphorus pentoxide, kaolin and diatomaceous earth. The alumina-based porcelain body prepared by the method of the invention has good bending strength and electrical breakdown strength, can withstand a large load force, is not easy to be damaged; and has high insulation performance, thereby improving the safety of the insulator during use.

The utility model discloses a heating tube sealing structure and baking tray, aim at solving the existing heating tube seal not thoroughly, the assembly stability is poor and so on. The structure contains heating disc, its inside is equipped with magnesium oxide filler, and the first, second heating tube cold needle is projected with respectively two ends, and there is the heating wire that penetrates heating disc and is wrapped by magnesium oxide filler between two cold needles. In addition, still be equipped with first conducting rod subassembly and second conducting rod subassembly, two respectively with the both ends sealed connection of heating disc. This design through both ends conducting rod subassembly and the close seal of heating disc, can bear the gas expansion pressure in pipe, prevent gas leakage, maintain the pressure balance in pipe, enhance the sealing reliability, effectively solve the sealing problem caused by gas expansion. Meanwhile, the structure reduces the dependence on the size precision of single component, even if the size error exists in component processing, can realize good sealing connection, reduces the unstable situation of assembly caused by size deviation, improves the stability and success rate of assembly.

For example, an object of the present disclosure is to provide a separator suitable for a capacitor including a negative electrode foil in which a carbon layer is formed, or to provide a capacitor including this separator. For example, a capacitor (2) includes a positive electrode foil (12), a negative electrode foil (14), and a separator (16) disposed between the positive electrode foil and the negative electrode foil, wherein the negative electrode foil includes a carbon layer (20), and the separator is in contact with the carbon layer and has a density [symbol: ρ, unit: g / cm3] satisfying the following formula: ρ≥4.0×10−3×WPA Herein, WPA is the amount of carbon per square centimeter of the separator [unit: µg / cm2].

The present invention discloses a cable branch box that prevents rainwater from penetrating, and the present invention relates to the technical field of electrical equipment, including a box mechanism. The cable branch box that prevents rainwater from penetrating is designed with a box mechanism. When external wind enters the box, the fiberboard is blown to shake appropriately with the wind, and the temperature inside the box rises during operation. When air enters the box and contacts the internal temperature, water vapor is easily generated to form condensation. The fiberboard is made of plant fiber material and has good water absorption, so as to achieve the effect of absorbing water vapor, prevent condensation, avoid equipment from being corroded, reduce the service life and reliability of the equipment, avoid reducing the insulation performance, and increase the risk of leakage, short circuit and other faults. By opening fiber grooves, the slot design can enhance the stability and reliability of the overall structure to a certain extent, and improve the service life of the equipment.

This invention discloses a high-performance meta-aramid / mica composite insulating paper and its preparation method. The paper is formed by wet papermaking and hot pressing of a mixed slurry composed of meta-aramid chopped fibers, meta-aramid precipitated fibers, and mica flakes. The composite insulating paper has a thermal decomposition temperature ≥425℃, tensile strength ≥52N / mm, tear strength ≥2.2N / mm, and voltage breakdown strength ≥13.8kV / mm. The mass ratio of chopped fibers to precipitated fibers is (50~80):(50~20). The amount of mica flakes added is 5wt%~10wt% of the total mass of the two aramid fibers. The hot pressing adopts a segmented hot pressing process of "low-temperature pre-pressing - medium-temperature strengthening - high-temperature setting". By controlling the key parameters of the precipitated fibers and optimizing the ratio of chopped fibers to precipitated fibers and the proportion of mica flakes added, the paper is prepared through processes such as raw material pretreatment, graded mixing and dissociation, wet papermaking, and segmented hot pressing. Advantages: Through multi-parameter coordinated control and process optimization, the technical bottlenecks such as the mechanical and insulation properties of existing aramid composite insulating paper and insufficient thermal stability have been solved.