280results about How to "Extend working life" patented technology

The invention discloses a construction method and application of an electrochemical luminescence (ECL) antifouling sensor based on zwitter-ion hydrogel, and belongs to the technical fields of photoelectric sensing analysis, interface antifouling and environmental science. According to the invention, the hydrogel based on sulfobetaine methacrylate zwitterions and bovine serum albumin is used as the antifouling coating, so that the adsorption of biological proteins and bacteria is effectively hindered, and the service life of the sensor is prolonged. Meanwhile, the interior label Au (at) luminol is packaged in the antifouling hydrogel, so that the integration of interface antifouling and ratio detection is realized, the detection accuracy is improved, and the construction process of the ECL sensor is simplified. The constructed ECL anti-pollution sensor has high sensitivity to chloramphenicol detection, the detection limit is 0.39 pM, and the ECL anti-pollution sensor is suitable for trace detection of antibiotics in seawater.

The invention belongs to the technical field of power battery cooling, and particularly relates to a flow control method and system for a liquid cooling system of an electric vehicle-mounted power battery, and the method comprises the steps: carrying out the parameterization of a geometric model of the liquid cooling system; establishing an equipment resistance model based on the equipment flow resistance characteristics; initializing flow distribution, constructing a dynamic flow distribution model, calculating the flow of each node and judging whether the flow meets a target requirement or not, and if not, readjusting the flow; calculating the resistance of each section, determining the total resistance of the pipeline, and checking the water pump lift; the flow uniformity is judged by calculating the pipeline resistance between the nodes, and if the flow is not uniform, the flow is redistributed or the pipeline design is optimized until the flow is uniform. Through flow control, the problems of non-uniform flow distribution and poor temperature consistency of multiple battery packs in the prior art are solved, the optimal working state of the power battery is ensured, overheating and overlarge temperature difference are avoided, and the operation efficiency, stability, durability and safety are improved.

The invention relates to the technical field of aero-engines, in particular to a weak-rigidity welding casing blade bending deformation control method which mainly comprises the following steps: firstly, setting the steps of performing electron beam welding on a blade, an inner casing and an outer casing: positioned welding, penetration welding and modification welding; then setting the electron beam welding sequence of strip welding seams between the blade and the inner casing as well as between the blade and the outer casing as the third welding seam, the fourth welding seam, the first welding seam and the second welding seam; and finally, the electron beam welding step in the first step is executed on the four welding seams according to the electron beam welding sequence determined in the second step. According to the mechanism of generation of welding buckling deformation, the welding buckling deformation of the blade is compensated by setting the steps of weak-rigidity cartridge receiver blade electron beam welding and setting the welding sequence, the straightness of the cartridge receiver blade is controlled, meanwhile, the influence on stress concentration parts such as a blade body anti-icing groove hole is reduced, the probability of fatigue cracks is reduced, and the service life of the cartridge receiver blade is prolonged. Therefore, the service life of the engine case is prolonged.

The invention relates to the field of large language models, in particular to a resource allocation method and system based on tensor parallelism, and provides a resource allocation method in order to solve the problems of how to meet calculation requirements under the condition of insufficient calculation resources and how to prolong the service life of equipment. Comprising the steps that calculation groups are divided, and the optimal calculation load and the maximum calculation load of the calculation groups are calculated; dividing the sub-modules into tensor modules or assembly line modules, and dividing priorities; calculating load capacity; calculating communication efficiency; calculating the load margin; allocating the sub-modules to each computing group to obtain a computing resource allocation plan; if the current load is greater than or equal to the maximum calculation load, preferentially calculating a part of sub-modules, and marking the sub-modules which are not preferentially calculated as to-be-distributed modules; and distributing the to-be-distributed module to the calculation group for assisted calculation.

An intelligent monitoring and early warning method for a mine geological environment relates to the technical field of geological disaster early warning and comprises the following steps: step 1, dividing monitoring points and collecting historical geological data, historical environmental data and historical meteorological data of a mine, step 2, preprocessing and summarizing the data, and performing preprocessing and feature extraction; the system comprises an information collection module, an edge calculation module, a model training module and an alarm module, the monitoring point data is collected, the early warning model is constructed, the early warning model is trained and deployed, and the energy consumption control and the alarm information transmission are carried out according to the early warning result. The system comprises an information collection module, an edge calculation module, a model training module and an alarm module. The power consumption of the monitoring point is determined according to the result of the early warning model, and alarm information is transmitted to the outside, thereby realizing prediction of mine geological disasters, improving the accuracy of the prediction result, controlling the power consumption of the monitoring point, prolonging the service life of the monitoring point, and promoting the stability of the monitoring system.

The invention provides a hot wire surface treatment method and a hot wire, and relates to the technical field of hot wire CVD. According to the surface treatment method provided by the invention, after the metal nitride layer is formed by nitriding the surface of the hot wire, the diffusion growth rate of the silicification layer on the surface of the hot wire can be delayed when the hot wire is subjected to silicon film deposition, so that the working life of the hot wire is effectively prolonged.

The invention discloses a construction method and application of a ratio-dependent electrochemical luminescence (ECL) biosensor based on an antifouling red cell membrane, and belongs to the technical fields of photoelectric analysis, biosensing and interface antifouling. In the invention, the erythrocyte membrane with super-hydrophilicity and low membrane protein content is used as an efficient antifouling interface, and the good biocompatibility of the erythrocyte membrane avoids the influence of a chemical antifouling coating on the biological activity of the ECL sensor. Meanwhile, the electropolymerized polyaniline nanowire is embedded into the antifouling erythrocyte membrane, so that the chemical stability and the conductivity of the antifouling erythrocyte membrane are enhanced, and the application of the antifouling erythrocyte membrane in ECL analysis is expanded. C3N4 is introduced as an interior label for eliminating background signals and external interference, so that the detection precision of the biosensor is improved. On the basis, the constructed ECL antifouling biosensor realizes ultra-sensitive detection of human breast cancer cells MCF-7 in human serum, and the detection limit is as low as 3 cells / mL.

The invention belongs to the technical field of organic photoelectric materials and devices, and discloses an organic electroluminescent device, a preparation method thereof and a display device. The device sequentially comprises an anode layer, a hole transport layer, a light-emitting layer, a second electron transport layer, a first electron transport layer and a cathode layer, wherein the first electron transport layer is composed of an n-type dopant and a first electron transport material. According to the adopted electron transmission structure, small electron injection barriers are arranged between the second electron transmission layer and the first electron transmission layer and between the second electron transmission layer and the main body material, and the organic light-emitting device prepared through the electron transmission structure achieves good voltage stability in the aging process; therefore, the problem of power consumption increase of the organic light-emitting device in the aging process is solved. And a relatively small electron injection barrier can reduce the driving voltage of the device, so that the organic light-emitting device with low driving voltage, long service life and stable voltage is obtained.

The utility model discloses an automobile battery pack liquid cooling plate, which is characterized in that a liquid cooling plate body is provided with an accommodating cavity used for installing an automobile battery pack, the side walls of two liquid cooling plate bodies on one side of the accommodating cavity are respectively provided with a first flow channel cavity, the two first flow channel cavities are communicated and connected, and the first flow channel cavities are filled with a cooling medium used for flowing cooling. A plurality of raised positioning parts are arranged on the inner wall of the accommodating cavity, a plurality of cooling towers are arranged in the positioning parts, the cooling towers are in through connection with the first flow channel cavity, a water diversion baffle sheet is inserted in each cooling tower, a groove part is formed in one side of each raised positioning part, and a heat-conducting silica gel sheet attached to the bottom surface of the accommodating cavity is arranged in each groove part; according to the utility model, the raised positioning part is arranged in the accommodating cavity to position the automobile battery pack, so that the stability of battery installation is improved; the flow channel cavity used for heat dissipation is formed, and heat generated during operation of the automobile battery is taken away by filling the flowing cooling medium, so that the working efficiency of the battery pack is improved, and the service life of the battery pack is prolonged.

The invention provides a packaging device and method for compensating temperature unevenness of a super-long fiber bragg grating through thermal expansion, the packaging device comprises a packaging structural member composed of a duralumin lower sleeve and an invar upper sleeve, the fiber bragg grating is installed in U-shaped grooves formed in the duralumin lower sleeve and the invar upper sleeve, and the packaging structural member is installed in a metal shell. And the TEC is adhered to the bottom of the packaging structural member through a solidifiable curing adhesive. Based on the characteristic that the thermal expansion coefficients of duralumin and invar are greatly different, when the temperature is changed, the length of the invar part is basically not changed, and the duralumin part is changed in length, and different length changes can generate stress on the fiber bragg grating, so that the influence of uneven temperature on the wavelength of the fiber bragg grating is compensated; the stability performance of the central wavelength of the ultra-long fiber grating is improved, and the requirements of scientific research fields and related engineering applications are better met.

The utility model discloses an intelligent anti-collision navigation buoy, which relates to the field of river navigation, comprises a lamp cabin, and is characterized in that the lamp cabin is a cylinder, a battery is mounted at the top of the lamp cabin, a lamp tube is fixedly mounted at the top end in the lamp cabin and corresponds to the battery, the lamp tube is hung in the center in the lamp cabin, and the lamp tube is connected with the lamp cabin. A clamping jaw structure is fixedly arranged on the outer cylindrical face of the lamp cabin, the clamping jaw structure is slidably connected with a clamping jaw, the signboard is convenient to replace, a light-emitting component is located in the main body, contact with the outside is reduced, the service life is prolonged, the lower end air cabin is designed in a split mode, and the performance of being prevented from being collided and frozen and extruded is improved.

The invention discloses an electrochemical microneedle patch, a device and a method for detecting a physiological marker in skin tissue fluid. The electrochemical microneedle patch comprises a patch as well as a counter electrode, a reference electrode and a working electrode which are fixed on the patch; the counter electrode, the reference electrode and the working electrode are converged on one side of the patch in a printed circuit mode to form a signal connecting port, and each of the counter electrode, the reference electrode and the working electrode comprises at least one conductive microneedle electrode; each conductive microneedle electrode is long enough to penetrate through the epidermal layer of the skin and reach the corium layer, the conductive microneedle electrode of the working electrode is provided with a detection component for detecting a physiological marker in skin tissue fluid, and the outer surface of the conductive microneedle electrode is covered with a hydrogel layer; the hydrogel layer has a net-shaped structure which can form a swelling layer without dissolution after absorbing skin tissue fluid in the corium layer, and the net-shaped structure allows the to-be-detected physiological marker to diffuse into or move away from the surface of the working electrode. According to the invention, the stability of the current signal can be improved, the problems of signal distortion and instability and the like are reduced, and the method is suitable for long-time online detection.

The utility model discloses a battery protection box with a heat dissipation function for a new energy automobile, which comprises a protection box and a heat dissipation device, the heat dissipation box is connected with the protection box, an air inlet grille is arranged at the end, away from the protection box, of the heat dissipation box, the heat dissipation box is provided with an air outlet grille, and the air outlet grille is located between the air inlet grille and the protection box; and the radiator is arranged in the heat dissipation box, the radiator comprises a heat dissipation pipe and heat dissipation fins, the heat dissipation fins are connected with the heat dissipation pipe, and the heat dissipation pipe is communicated with the liquid cooling device. According to the scheme, through the combination of the liquid cooling device, the radiator and the heat dissipation box, the cooling liquid can be effectively cooled, so that the working efficiency of the cooling liquid is improved, heat generated by the battery is better dissipated, and the battery is kept in a proper working temperature range.

The invention discloses an intelligent monitoring method for subsidence of the ground around a site in subway shield construction, and relates to the technical field of shield construction subsidence monitoring. 2, determining an installation scheme of the intelligent monitoring equipment; 3, positioning and installing the intelligent monitoring equipment; 4, liquid injection operation is conducted on the intelligent detection equipment; step 5, installing a corresponding data relay; 6, executing a data verification program; 7, analyzing and judging the monitoring data; and 8, classifying and archiving the monitoring data. According to the intelligent monitoring method for subsidence of the ground around the site in subway shield construction, intelligent equipment is adopted for monitoring according to the type of a house building, the monitoring efficiency and the monitoring precision are improved, and it can be guaranteed that monitoring is conducted for 24 h; the overall working efficiency is improved, and the construction cost is saved.

The invention relates to a femtosecond laser processing system and method for an emitter of an electrospray thruster. The femtosecond laser processing method comprises the steps that the femtosecond laser processing system is built; the precise three-axis displacement table is adjusted through the program control computer, so that the femtosecond pulse laser is focused to the surface of the porous ceramic processing sample through the focusing objective lens; rough machining of an emitter structure is carried out, and linkage scanning of femtosecond pulse laser on the surface of a porous ceramic machining sample is achieved by controlling a galvanometer and a precise three-axis displacement table through a program control computer; the emitter structure is subjected to finish machining, reciprocating scanning of femtosecond pulse laser on the surface of a porous ceramic machining sample is achieved through a galvanometer, a mechanical shutter is controlled in the scanning process, and ablation-free of a conical emitter structure area is achieved; rough machining and finish machining are repeated, and array expansion is carried out on the conical emitter structure; and performing ultrasonic cleaning. The problems that traditional machining precision is low, edge breakage exists on ceramic materials, and pores are blocked are solved, the service life of the electrospray thruster is prolonged, and the specific impulse of the electrospray thruster is increased.

The present invention discloses a backlight module for Mini LED and a fixing structure thereof, the backlight module comprising: a backlight source, a base, a light guide plate and an optical film, a receiving cavity is provided in the base, an inner arch platform is provided inside the receiving cavity, and a recessed structure is formed on the bottom surface of the base, and a plurality of convex ribs are provided at the recessed structure. The backlight source comprises a substrate plate and a plurality of LED lamp beads, and the substrate plate is fitted with the inner arch platform. The light guide plate and the optical film are stacked on the LED lamp beads of the backlight source. The module fixing structure also comprises: a first inner bracket, a second inner bracket, an outer frame and a positioning plug, the first inner bracket and the second inner bracket are both slidably provided in the receiving cavity, and the two slide close to each other to clamp the light guide plate and the optical film. The backlight module and the fixing structure thereof of the present invention can improve the overall heat dissipation capacity, and facilitate the installation and disassembly operations of the backlight module, thereby improving product quality and extending its service life.

The invention provides a door assembly and a washing machine, the door assembly comprises a door body, a hinge structure and a front sealing door, the hinge structure is arranged on any one of the left side, the right side, the upper side and the lower side of the front sealing door, the door body is hinged to the front sealing door through the hinge structure, the other side of the door body is provided with a lock catch structure, and the lock catch structure and the hinge structure are oppositely arranged; an elastic piece and a damper are arranged in the hinge structure, the damper is connected with the elastic piece, when the door body is closed, the elastic piece is in a compressed state, and after the lock catch structure is unlocked, the elastic piece automatically opens the door body under the action of restoring force. The hinge structure can be arranged on any one of the left side, the right side, the upper side and the lower side of the front sealing door, and door opening in the up-down direction or the left-right direction can be achieved. The door body is automatically opened through the arrangement of the elastic piece, meanwhile, the damper is used for reducing the opening speed of the door body, the situation that the door body bounces over quickly due to sudden return of the elastic assembly is avoided, damage to the door body and the hinge part is reduced, and the working life and stability of the hinge part are improved.

The utility model relates to the technical field of oil extraction and well cementation, in particular to a casing centralizer which comprises a double-bow spring piece and a clamping device, and the clamping device comprises a pressing ring and a cover plate. The pressing rings are semicircular rings, lug plates are arranged on the two sides of each pressing ring, threaded holes are formed in the lug plates, and locking bolts penetrate through the threaded holes to connect the two pressing rings. The pressing ring is connected with the cover plate, mounting grooves are formed in the inner sides of the pressing ring and the cover plate, and spring clamping blocks are mounted in the mounting grooves; a circular groove is formed in the arched part of the double-bow spring piece, and a roller is arranged in the circular groove. According to the utility model, the rollers are arranged on the double-bow spring piece, so that direct friction with the well wall is avoided, and the service life of the device is prolonged; and sliding friction between the original casing centralizer and the well wall is changed into rolling friction, so that the casing can be put down conveniently. The semi-circular ring pressing rings are arranged at the two ends of the novel casing centralizer, the novel casing centralizer is clamped on a casing through the locking bolts and the spring clamping blocks, and due to the compressibility of the spring clamping blocks, the novel casing centralizer can be applied to casings of different specifications and sizes.

The invention relates to superhigh-pressure lifting alignment precision equipment for a laminating machine, which comprises an oil cylinder connecting movable plate, an alignment compensation working platform, a jacking mechanism, a high-precision compensation executing mechanism and a lower suction cup mounting plate, the jacking mechanism comprises an upper jacking air cylinder, and a jacking rod of the upper jacking air cylinder is connected with the alignment compensation working platform; the high-precision compensation executing mechanism comprises four compensation servo motors, and a center stress application ejecting block is installed in the middle of the upper face of an oil cylinder connecting movable plate. Alignment compensation actions are concentrated on a small platform to be completed, the stroke is very small, displacement errors caused by the too large movement stroke are effectively reduced, the upper suction cup and the lower suction cup are accurately attached in the pressed process and are more accurate in the operation process, the situation that products are damaged due to uneven pressing is effectively reduced, and the products are more evenly pressed. And the risk of equipment damage caused by friction is avoided, and the service life of the equipment is effectively prolonged.

This utility model discloses a wear-resistant screw drill bit, belonging to the technical field of screw drill bits. The wear-resistant screw drill bit includes a bypass valve, a hydraulic motor, a universal joint, a drive shaft, and a housing. The universal joint includes a connecting rod, with ball seats and short sections at both ends. A locking sleeve is provided between the ball seats and the short sections. A cavity is formed inside the ball seats, and a movable groove is formed on the outer side of the ball seats. A movable rod is slidably connected to the inner side of the movable groove, and a movable block is fixed to the outer side of the movable rod. Two sealing rings are embedded on the outer side of the movable block. This utility model can automatically filter metal debris from the lubricating oil, greatly extending the working life of the lubricating oil and reducing the frequency of lubricating oil replacement. To a certain extent, it solves the problem that universal joints are prone to wear in high-temperature and high-pressure environments, requiring regular lubricating oil replacement to prevent metal debris from further aggravating wear, which is time-consuming and labor-intensive.

This invention provides a core-iron assembly, a solenoid valve, and an automotive thermal management system. It includes a sleeve, a coil assembly, a first iron core, a pressure head, a second iron core, and a copper ring. The coil assembly is disposed outside the sleeve; the first iron core is fixed inside the sleeve and has a groove; the pressure head is fitted into the groove; the second iron core is disposed inside the sleeve and can move axially along the sleeve; a first elastic element is disposed between the second and first iron cores; and the copper ring is sleeved between the pressure head and the sealing head. This invention, by placing a copper ring between the first and second iron cores of the solenoid valve, enables the first and second iron cores to quickly eliminate residual magnetism when the solenoid valve is de-energized and slows down the impact speed of the iron cores when energized, thereby shortening the separation time of the first and second iron cores, reducing noise when the first and second iron cores are engaged, reducing wear, and thus extending the service life of the solenoid valve.

The invention discloses an electric power iron tower monitoring system and method, and the system comprises a camera unit which is used for monitoring an electric power iron tower; the track is arranged to be of a closed structure surrounding the electric power iron tower; and the moving assembly comprises a moving seat, the camera shooting unit is installed on the moving seat, and the moving seat can move along the track to drive the camera shooting unit to move to any position of the track. The monitoring method of the electric power iron tower adopts the monitoring system to monitor the electric power iron tower. The electric power iron tower monitoring system is provided with the track surrounding the electric power iron tower, and the moving assembly capable of moving along the track drives the camera shooting unit to surround the electric power iron tower, so that dead-angle-free camera shooting monitoring and detail targeted camera shooting monitoring of the camera shooting unit on the electric power iron tower are achieved, and the economic cost of monitoring is greatly reduced; the camera has a good anti-shake effect, and the camera shooting is clearer and more accurate.

The invention relates to the technical field of magnetic pumps, and discloses a rare earth modified fluororesin coating for a magnetic pump and a preparation method thereof, comprising the following components: rare earth modified fluororesin, nano filler, micro filler, acrylic emulsion, film-forming aid, isobutyl methacrylate, leveling agent, sodium silicate and deionized water; the rare earth modified fluororesin coating of the invention can form a uniform and dense protective coating on the surface of the magnetic pump, and the formed protective coating can effectively protect the magnetic pump, thereby avoiding the corrosion effect of the conveying medium on the magnetic pump material, and greatly improving the working life of the magnetic pump.

The application relates to the technical field of power supply circuits, and particularly discloses a self-adaptive constant-current control method and system for a DC-DC direct-current conversion power supply, wherein the output voltage is acquired in real time and compared with a plurality of preset voltage thresholds, the interval where the output voltage is located is identified, the input current constant-current given value is reduced according to a first step value in response to the output voltage rising in the voltage limiting zone, the input current constant-current given value is reduced according to a second step value in response to the output voltage rising in the current sharing zone, and the first step value is greater than the second step value, so that the voltage overshoot caused by load shedding is quickly inhibited, the stable control of the output voltage is brought, the dynamic response capability of the system is improved, and the risk of damage of power devices due to overvoltage is reduced.

The utility model discloses a pickaxe-shaped cutting pick. The pickaxe-shaped cutting pick comprises a pick body assembly, a pick head, a hard alloy head and a ball type wear-resistant layer assembly, a rib type reinforcing rib assembly is installed on the outer wall of the tooth body assembly. The tooth head is of a cone frustum structure, and the bottom face of the tooth head is fixedly connected with the top face of the tooth body assembly. The hard alloy head is mounted on the top surface of the tooth head; the ball type wear-resistant layer assembly comprises a plurality of wear-resistant balls and a plurality of mounting grooves, and the mounting grooves are formed in the side wall of the tooth head in the circumferential direction. Through the arrangement of the mounting grooves and the wear-resistant balls, the eccentric wear phenomenon of the wear-resistant layer is avoided, the effect of protecting the pickaxe-shaped cutting pick is achieved, meanwhile, the use performance of the wear-resistant layer is improved, and the service life of the wear-resistant layer is prolonged; through the arrangement of the rib type reinforcing rib assembly, the effect of protecting the pick body assembly can be achieved, the spinning performance of the pickaxe-shaped cutting pick can be optimized, and the overall working efficiency and production efficiency are improved.

The patent relates to the technical field of tobacco, and particularly relates to a conveying system for a paper-process sheet drying oven and the paper-process sheet drying oven. The conveying system comprises a conveying device, a first deviation rectifying device and a second deviation rectifying device. The first deviation rectifying device and the second deviation rectifying device are both used to provide displacement in a deviation rectifying direction to the conveying belt, the deviation rectifying direction is perpendicular to the length direction of the conveying belt, the distance between the first deviation rectifying device and the end driving roller is not greater than 10%, 20% or 25% of the length direction size of the transmission assembly, and the second deviation rectifying device is arranged substantially symmetrically to the middle line of the transmission assembly in the length direction of the first deviation rectifying device. The patent can better solve the deviation problem of the conveying belt, save labor cost, improve production efficiency and reduce the labor intensity of the operator. The deviation rectifying frequency of the first deviation rectifying device and the second deviation rectifying device is lower during the working process, and the first deviation rectifying device and the second deviation rectifying device are more suitable for deviation rectifying of long-distance belt conveying systems and have a longer service life.

The present invention provides a satellite-borne dual-band common-surface antenna array based on a metal structure. The antenna array is a metal structure and is divided into two parts. One part is a hollow frame structure, which adopts a Vivaldi structure antenna form. Through the design of structural folding, structural hollowing, coupling between units, etc., the antenna has good electrical performance in the P band; the other part is embedded between the P-band antenna units and is located at the bottom of the overall structure. It serves as a metal floor of the P band and can also realize the slot radiation waveguide of the X-band electrical performance. The present invention also designs the dual-band antenna arrays into a dual-polarization form, in order to avoid polarization rotation caused by multipath reflection when electromagnetic waves penetrate dense plants, thereby generating polarization mismatch.

The utility model relates to coffee machine technical field especially points to a kind of anti-spray structure and coffee machine, including shell, drive part is equipped on the shell;Cover assembly, the cover assembly is hinged on shell, cover assembly is equipped with soft water pipe and pressure relief device, pressure relief device is correspondingly set with soft water pipe, pressure relief device is used to release or flatten soft water pipe;The drive part is correspondingly set with pressure relief device;When cover assembly is closed relative to shell, pressure relief device releases soft water pipe by drive part driving;When cover assembly is opened relative to shell, pressure relief device is separated from drive part, and pressure relief device flattens soft water pipe.Such setting, when opening cover assembly, cover assembly drives pressure relief device to separate from the drive part on shell, and pressure relief device flattens soft water pipe, soft water pipe cannot water pass at this time, to realize opening anti-spray, anti-scald function, use safe, and adopt flattened soft water pipe's mode, can improve the working life of soft water pipe;Its structure is simple, and cost is not high.

The present invention relates to the technical field of organic electroluminescent materials, and in particular to an organic electroluminescent compound and a preparation method and application thereof; the organic electroluminescent compound has a structure as shown in Formula I, and the organic electroluminescent compound is endowed with a higher glass transition temperature and good thermal stability through the design of the molecular structure and substituents, thereby avoiding its degradation in a high-temperature deposition process; and the hole transport performance and stability of the organic electroluminescent compound as a hole transport layer are significantly improved, so that an OLED device containing the organic electroluminescent compound has high luminous efficiency and long service life, and improves power efficiency and power consumption.

The utility model relates to the field of machining, in particular to a hard alloy threaded handle twist drill with an internal cooling structure, which comprises a motor head, a clamping opening is arranged at the front end of the motor head, a drill bit is clamped and fixed in the clamping opening, and an internal cooling device is arranged in the drill bit; the inner cooling device comprises a water inlet fixing groove, a plurality of stable inserting rods are fixedly connected to the upper end face of the water inlet fixing groove, clamping fixing grooves are correspondingly inserted into the stable inserting rods, and the clamping fixing grooves are formed in the outer side of the front end of the motor head; the inner cooling device has the advantages that by arranging the inner cooling device, when a workpiece is machined by the hard alloy thread handle twist drill, the drill bit can be cooled in real time through water cooling circulation in the drill bit, meanwhile, rotation work of the drill bit is not affected, and the service life of the drill bit is prolonged.