360results about How to "Simple and safe operation" patented technology

The invention relates to plasma gun automatic spraying equipment which comprises a workbench, an X-axis moving assembly, a Y-axis moving assembly and a rotating shaft assembly, the X-axis moving assembly, the Y-axis moving assembly and the rotating shaft assembly are located above the workbench, the rotating shaft assembly is connected with an ion gun fixing support, and the X-axis moving assembly, the Y-axis moving assembly and the rotating shaft assembly move independently or cooperatively. And the plasma gun on the ion gun fixing bracket is driven to spray the workpiece according to the set motion path. Through an advanced automatic control system and an intelligent adjusting function, the spraying process can be accurately controlled without manual intervention, the consistency of the production efficiency and the spraying quality is remarkably improved, meanwhile, the dependence on manual operation is reduced, and the equipment maintenance cost is reduced. The equipment disclosed by the invention has higher adaptability, can be automatically adjusted to adapt to different types of workpieces, has a fully automatic spraying process, has higher application and popularization values and is suitable for large-scale production.

The invention relates to a decarboxylation coupling method catalyzed by N-heterocyclic carbene. Small organic molecule N-heterocyclic carbene is used as an organic catalyst, manganese is used as a reducing agent, aromatic acid or derivatives thereof and an electrophilic reagent are subjected to cross coupling, and multi-structure ketone is prepared. Small organic molecule N-heterocyclic carbene is used as an organic catalyst, manganese is combined as a reducing agent, cross coupling of aromatic acid or derivatives thereof and some cheap and easily available electrophilic reagents can be promoted, ketones with various structures can be provided at high yield, and the method is especially suitable for preparation of high-steric-hindrance ketone compounds and has wide application prospects. The method has the advantages of high yield, convenience in separation, high efficiency, mildness, low-cost economy and high industrial application value, and the requirement on transition metal catalysis can be reduced.

The invention discloses a photovoltaic control system and method for coping with extremely cold wind and snow weather. The method comprises the following steps: acquiring data of an inverter and a photovoltaic panel; judging the freezing condition of the cooling fan in combination with the data of the inverter and the cooling fan; if it is judged that the cooling fan is in the frozen state, a control loop corresponding to the inverter is adjusted to enable the inverter to work in an SVG mode; judging the snow accumulation condition of the photovoltaic panel by combining the environment data and the state data of the photovoltaic panel; if the photovoltaic panel is in the snow accumulation state, a heating device installed on the photovoltaic panel is controlled to heat the photovoltaic panel. The system is used for implementing the method. The photovoltaic system has the advantages that the cooling fan can be unfrozen, accumulated snow of the photovoltaic panel can be removed, and it can be guaranteed that the photovoltaic system can better cope with extremely cold weather. And in addition, the unfreezing process of the cooling fan and the snow removing process of the photovoltaic panel are simple and safe, excessive hardware structures are not added, and it can be guaranteed that excessive extra cost is not increased.

The invention provides a safe and reliable data center machine room cooling channel, and belongs to the technical field of data center heat dissipation and cooling devices. Comprising a bottom plate component, a vertical frame component, data center cabinets, a fire-fighting linkage skylight system, an access door system, an access control system and a monitoring sensing system, the data center cabinets are arranged between the bottom plate component and the vertical frame component in pairs, and the fire-fighting linkage skylight system is located at the top ends of the data center cabinets and the vertical frame component and can be in linkage with the monitoring sensing system. The channel door systems are located on the two sides of the cold channel respectively and can be in linkage with the access control system and the monitoring sensing system, and the purposes of safe opening and closing and emergency opening and closing are achieved. Meanwhile, an intelligent lighting system is further installed on the outer bottom face of the bottom short frame in the fire-fighting linkage skylight system, conventional lighting management can be achieved, highlight continuous lighting can be conducted in emergency, and reliable guarantee is provided for efficient operation, safety management and energy-saving control of a data center.

The invention discloses a bearing inner ring machining device and belongs to the technical field of bearing inner side grinding and polishing, the bearing inner ring machining device comprises a chain plate conveying belt arranged in a machining supporting frame, and a plurality of inner ring fixers which are evenly distributed and used for fixing bearing inner rings are fixedly connected to the surface position of the chain plate conveying belt. According to the bearing inner ring polishing machine, the inner ring fixing device is arranged, a bearing inner ring needing to be polished is placed between the inner ring clamping jaws at the corresponding positions, the bearing inner ring is pressed downwards, so that the bearing inner ring is clamped and fixed, then the bearing inner ring is ground and polished through the polishing machine body, and after polishing is finished, the two inner ring clamping jaws can be unfolded through a shifting block; when the bearing inner ring rotates to the position below the chain plate conveying belt, the bearing inner ring falls under the action of gravity, automatic material taking is completed, the whole grinding process is high in efficiency and high in mechanization degree, the manual operation part is far away from the polishing machine body, and use and operation are safer.

The invention belongs to the technical field of drilling machine control, and particularly discloses an automatic rod connecting and detaching control method and system for a raise boring machine, and the automatic rod connecting and detaching control method comprises the steps: carrying out the motion decoupling of a rod connecting motion and a rod detaching motion between a butt joint end on the raise boring machine and a drill rod, so as to obtain a first motion parameter; generating a control instruction of the raise boring machine for operating the butt joint end according to the first motion parameter; according to the first motion parameter, influencing the assembly state of the butt joint end and the drill rod, setting a judgment threshold value, and setting operation time; the butt joint end and the drill rod are controlled to execute the rod connecting action or the rod dismounting action through the control instruction, and the control instruction is adjusted within the operation time by judging the threshold value; compared with the prior art, the raise boring machine has the advantages that the operation accuracy and efficiency of the raise boring machine are improved through action decoupling and automatic control, personal errors are reduced, resource utilization is optimized, and the automation level and economic benefits of operation are improved.

The utility model is suitable for the technical field of intermediate frequency furnaces, and provides a smelting intermediate frequency furnace with high safety, which comprises an intermediate frequency furnace body provided with a heating layer and an insulating layer, the sealing cover is arranged on the intermediate frequency furnace body; the through opening is formed in the sealing cover; the movable groove is formed in the sealing cover, and the movable groove and the through opening are correspondingly formed; the movable plate is mounted in the movable groove in a sliding manner and is arranged corresponding to the through hole; the adjusting mechanism is arranged on the sealing cover and used for adjusting the area, covering the through opening, of the movable plate. According to the smelting intermediate frequency furnace with the high safety, the sealing cover can be selectively opened or closed according to needs, and non-artificially added objects are prevented from falling into the intermediate frequency furnace while the normal use requirement is met.

The invention discloses a preparation method of a pyridino-isoquinoline-2-ketone derivative, which comprises the following steps: under the protection of nitrogen, putting 1-aryl-3, 3-difluorocyclohexene, brominated N-(2-phenyl-2-oxo) ethyl isoquinolinium, alkali and a solvent into a reactor, reacting at 60 DEG C for a period of time, and then adding tert-butyl hydroperoxide to continue reacting; and after the reaction is finished, reducing pressure to remove the solvent, and carrying out column chromatography separation to obtain a pure product of the pyridino isoquinoline-2-ketone derivative. Initial raw materials are cheap, easy to obtain and wide in source, and products are complex and diversified in structure. The process flow is simple, and operation is simple and safe. Double bonds conjugated with two carbonyl groups in the target product can be further subjected to functionalization reaction, so that the target product can be conveniently subjected to diversified structural modification.

The invention relates to the technical field of compound preparation, in particular to a preparation method of nitrobenzimidazole and aminobenzimidazole compounds, which comprises the following steps of: adding an inorganic base catalyst into an organic solvent by taking 4-nitro-o-phenylenediamine and a nitrobenzoyl chloride compound as raw materials; the preparation method comprises the following steps: reacting at a temperature lower than room temperature to obtain a condensation reaction solution, continuously raising the temperature of the condensation reaction solution to carry out cyclization reaction, and after the reaction is finished, carrying out post-treatment to obtain the 2-nitrobenzimidazole compound. Taking the 2-nitrobenzimidazole compound as a raw material, adding a reduction catalyst, carrying out hydrogenation reduction reaction in a solvent, and after the reaction is finished, carrying out post-treatment to obtain the 2-aminobenzimidazole compound. According to the preparation method, the inorganic base catalyst is used for replacing a conventional acid catalyst to realize one-pot synthesis, and the preparation method is high in selectivity, high in product quality and yield, mild in reaction condition, simple and convenient to operate, environment-friendly and suitable for batch production.

The invention relates to a preparation method of a negative electrode material for greatly exposing (101) crystal faces of a traditional commercial zinc foil by adopting a citric acid etching reaction and application of the negative electrode material in water-based zinc ion battery negative electrode protection. And the crystal faces (100) and (002) are etched off by using citric acid, and a large amount of the negative electrode material of the crystal face (101) is exposed. When applied to a negative electrode of a water-based zinc ion battery, the negative electrode material can improve the migration and nucleation capabilities of zinc ions in the negative electrode, can accelerate the dynamic process of rapid and uniform deposition of the zinc ions, and also can improve the stability of the battery. The stability and the dynamic performance of the negative electrode can be greatly improved, zinc ions can achieve rapid migration and uniform deposition on the surface of the negative electrode, and a good inhibition effect on hydrogen evolution and corrosion behaviors is achieved. Research finds that a layer of ZnS solid electrolyte membrane (SEI) protection layer is formed on the surface of the highly exposed Zn (100) negative electrode in the circulation process to prevent direct contact between an exposed crystal face and electrolyte, so that side reactions such as water decomposition and the like are inhibited, interface free energy is reduced, transfer kinetics of zinc ions is promoted, and the service life of the negative electrode is prolonged. And nucleation and deposition of uniform zinc ions are facilitated. The method for protecting the negative electrode of the aqueous zinc ion battery is simple and safe to operate, shows excellent reversibility, and can stabilize the output of the battery in a whole battery in practical application, and the method for protecting the negative electrode of the aqueous zinc ion battery is provided.

The utility model relates to the technical field of paint making corollary equipment, in particular to a metal anti-rust paint bucket uncovering device which comprises a paint bucket and an uncovering device body, the uncovering device body comprises a connecting ring, a clamping base, a pedal, an insertion pipe, a telescopic rod, a rotary knob, a pinch bar and an opening device, the connecting ring is arranged on the outer side of the bottom of the paint bucket in a sleeved mode, and the clamping base is arranged on the clamping base. The clamping seats are fixed to the two ends of the top of the connecting ring, the treading plates are arranged in the clamping seats in a clamped mode, the inserting pipe is fixedly arranged on the top of the connecting ring, the telescopic rod is arranged on the inner side of the top of the inserting pipe in a clamped mode, and the rotary knob is connected with the top of the outer side of the inserting pipe through threads. The wedge-shaped area at the end of the inserting block is clamped between the barrel wall and the prying plate on the edge of the barrel cover, the barrel cover of the paint barrel is opened by upwarping according to the lever principle, operation is convenient, the opening requirements of the paint barrels of different sizes are met, the completeness of the barrel cover is kept, and operation is easy and safe.

The invention discloses a silicon scaling cleaning agent. The cleaning agent contains a polyphenol compound, a surfactant, a chelating agent, a pH regulator and water, the cleaning agent is prepared from the following components in percentage by mass: 1 to 5 percent of polyphenol compound, 0.1 to 1 percent of surfactant, 0.1 to 1 percent of chelating agent and the balance of pH regulator and water. A polyphenol compound is used as an effective component, and the solubility of silicon scale is improved through the interaction of a phenolic hydroxyl group and silicon dioxide, so that the purpose of elution is achieved. Compared with the prior art, the cleaning agent provided by the invention can be used under a mild alkalescent pH condition, corrosion to metal equipment is avoided, and safe operation of personnel is facilitated.

The invention provides a loop-mediated isothermal amplification primer composition for combined detection of multiple equine animal viruses, a disposable centrifugal micro-fluidic chip, an LAMP micro-fluidic chip kit and a nucleic acid detection method of the LAMP micro-fluidic chip kit. The loop-mediated isothermal amplification primer composition comprises nucleotide sequences as shown in SEQ ID: 1 to SEQ ID: 16. A fluorescent dye and a loop-mediated isothermal amplification primer composition are pre-embedded in the disposable centrifugal micro-fluidic chip. The LAMP micro-fluidic chip kit comprises a disposable centrifugal micro-fluidic chip and an LAMP amplification working solution. The problem of multiple detection of VSV, NiV, EEEV and WEEV in equine animal viruses is solved, and the detection method is high in specificity, short in reaction time, safe, simple and convenient to operate, high in sensitivity, low in cost and suitable for being used when a temporary virus detection laboratory is established.

The invention provides a high-durability super-amphiphobic aircraft anti-icing coating and a preparation method thereof.The preparation method comprises the steps that silicon dioxide nanoparticles are loaded on the surfaces of micron attapulgite particles in situ to prepare core-shell structure micro-nano composite particles, and low-surface-energy fluorosilane is added for modification; meanwhile, fluorinated modification is conducted on a waterborne polyurethane adhesive through fluorosilane, the modified micro-nano particles are introduced into the modified polyurethane adhesive, then the surface of semi-cured airplane paint is evenly sprayed with the modified polyurethane adhesive, and the super-amphiphobic anti-icing coating is prepared through curing. The super-double hydrophobic surface prepared by the method shows excellent repellency to liquids (water, rapeseed oil, lubricating oil and hexadecane) with different surface tensions, can delay icing of liquid drops on the surface of a coating for 440 seconds at-15 DEG C, and has excellent comprehensive protection performance of wear resistance, airflow impact resistance, oil stain resistance and acid and alkali corrosion resistance; good super-amphiphobic performance can be kept after mechanical wear and chemical corrosion.

The invention relates to the technical field of ferrous metallurgy casting, in particular to a drainage sand removing and recycling method and device. Comprising a mechanical arm, a lifting rotation controller, a controller arm, a sand suction cylinder, a sand conveying pipeline, a sand collecting tank and an injection pump. The lifting and rotating controller is fixedly mounted on the mechanical arm; the controller arm is connected with the lifting and rotating controller, and the lifting and rotating of the controller arm are controlled by the lifting and rotating controller; the sand suction cylinder is connected with the controller arm, the sand suction cylinder is of a U-shaped structure, and one end of the sand suction cylinder is a horn mouth used for sucking drainage sand; one end of the sand conveying pipeline is positioned above the tundish cover sprue gate, and the end part of the sand conveying pipeline is bent downwards to be connected with the other end of the sand suction cylinder; the other end of the sand conveying pipeline is connected with the sand collecting tank; the sand collecting tank is connected with an injection pump pipeline, and the injection pump provides suction power. The ladle filler sand, harmful gas in gaps of the ladle filler sand and a long nozzle and a small part of molten steel in contact with the ladle filler sand in a steel ladle can be discharged out of tundish molten steel and recycled.

The invention belongs to the technical field of buildings, and particularly relates to an adjustable aluminum mold transfer opening delayed mold removal supporting system and a construction method thereof. The supporting system comprises a floor formwork system, a rectangular reserved opening is reserved in the middle of the floor formwork system, a sliding formwork is detachably installed in the middle of the reserved opening, and steel supporting formworks are arranged on the two sides of the sliding formwork. According to the device, the construction quality of the material conveying opening can be effectively improved, the problems of opening structure unloading, slurry leakage and poor concrete impression caused by secondary back-jacking process formwork erecting are reduced, secondary grinding and repairing after formwork dismounting are avoided, and the quality problems of cracking, leakage and the like of the material conveying opening can be effectively controlled. And secondary formwork erecting is not needed when the material conveying opening is poured, the construction progress can be accelerated, and the construction cost is reduced. And meanwhile, when the material conveying port outlet structure is constructed, unloaded unloading is carried out on the surrounding structural plates.

A marked line removing device for road construction comprises a base, a plurality of rolling wheels are fixedly arranged on the bottom side of the base, an air blowing heating mechanism is fixedly arranged on the base, and a grinding disc is rotationally arranged on the bottom side of the base and is characterized in that the grinding disc comprises an inner disc and an outer disc, and a driving mechanism for driving the inner disc and the outer disc to rotate oppositely is arranged on the base; a box body is fixedly arranged on the base, and an air outlet and a dust suction opening are formed in the box body. The road marking polishing device is simple in structure and ingenious in conception, the inner disc and the outer disc on the polishing disc rotate in the opposite directions, marking lines on a road surface can be polished, meanwhile, the marking lines can fall off more easily through shearing force formed between the inner disc and the outer disc, the polishing effect is improved, and the polishing efficiency is improved. Dust and residues generated during marking line polishing can enter the box body through suction force generated by the air blowing heating mechanism, environment pollution is prevented, unified residue treatment in the later period is facilitated, operation is easy and safe, the danger of daily work is reduced, the market requirement can be met, and the marking line polishing device is suitable for popularization.

This invention relates to the fields of circuit and automatic control technology, and particularly to an automatic switching control system and testing method for control board programming and testing modes. The system includes: a driver board comprising an MCU minimum system circuit one, a DC-DC circuit one, and an SWD circuit; a tooling board comprising an MCU minimum system circuit two, a DC-DC circuit two, a program programming switching circuit, a program programming control circuit, and a pin connector; and host computer software including a USB communication serial port, program programming test code, test control selection, and factory code programming. This invention can simultaneously perform hardware testing and factory program programming of the control board, meeting the requirements for automated programming and testing of control boards.

The invention discloses a method for synthesizing spiro [cyclohexane-1, 3 '-indoline]-2, 5-diene-2'-ketone compounds, which comprises the following specific steps: sequentially adding N-biphenyl oxalic acid compounds, alkali and a catalyst into a reaction container, vacuumizing and backfilling for multiple times by using argon, adding a solvent, and reacting under the conditions of argon atmosphere and visible light irradiation, thereby obtaining the spiro [cyclohexane-1, 3 '-indoline]-2, 5-diene-2'-ketone compounds. And stirring and reacting at room temperature to obtain the target product spiro [cyclohexane-1, 3 '-indoline]-2, 5-diene-2'-ketone compound. The preparation method disclosed by the invention is simple, convenient and safe to operate, mild in reaction condition and good in functional group tolerance, a light source of the method is visible light and is green and pollution-free, and the catalyst and a reaction medium are relatively friendly to the environment. Part of target compounds synthesized by the invention show remarkable antitumor activity and can be further used for preparing antitumor drugs.

The invention relates to a superconducting current lead device with an adjustable power-on length and an adjusting method thereof.The device comprises a current lead conducting rod, a connector, a telescopic arm, an electric device, a power-on flexible wire, a power-on bus and a superconducting cable, a motor for driving the telescopic arm to stretch out and draw back is arranged in the electric device, the telescopic arm stretches out and draws back to drive the connector to be connected with or separated from the current lead conducting rod, the power-on length of the current lead conducting rod is changed, the connector is further connected with a power-on bus through a power-on flexible wire, one end of the power-on bus is connected with the power-on flexible wire, and the other end of the power-on bus is connected with a superconducting cable. Compared with the prior art, the length of the superconducting current lead can be automatically adjusted, heat leakage caused by the current lead in a superconducting cable or a superconducting device system is effectively reduced, and the effect of adjusting the length of the current lead according to current so as to reduce heat loss is achieved.

The utility model relates to the technical field of polyester DTY, and discloses a twist stopping device with an adjusting structure, which comprises a twist stopping device and a support, a round block is fixedly mounted on the surface of the twist stopping device, and a round rod is fixedly mounted on the surface of the support. When the movable block and the fixed block descend to the bottommost part of the support, the fixed rod penetrates through the fixed block and abuts against the tangent plane of the supporting block, the movable plate fixed to the surface of the supporting block slides in the annular groove in the surface of the cylinder under the supporting of the spring, the cylinder can drive the transverse rod to rotate, and the clamping rod rotates in the circular groove; when the twisting stopper is detached, the twisting stopper can be pulled out of the fixing block and can be used for the second time, the detaching mode can guarantee operation safety and convenience of operators, and the situation that operation is inconvenient or detaching is difficult due to the fact that the twisting stopper is too high is avoided.

The invention discloses a benzofuranopyran compound as well as a synthesis method and application thereof, and belongs to the field of organic chemical synthesis. The invention aims to provide a benzofuranopyran compound. The benzofuranopyran compound has certain cytotoxic activity on human cervical cancer Hela cells. Another purpose of the invention is to provide a synthesis method of the benzofuranopyran compound. The method has the advantages of mild reaction conditions, low cost and high yield. The method comprises the following steps: by taking # imgabs 1 # and malononitrile as reaction raw materials, ethyl acetate as a reaction solvent and N, N-diisopropylethylamine as an accelerant, carrying out stirring reaction, tracking the reaction by TLC until the reaction is complete, filtering, concentrating filtrate, and purifying to obtain the benzofuranopyran compound. The invention relates to an application of a benzofuranopyran compound in preparation of a medicine for inhibiting human cervical cancer Hela cells. According to the invention, the benzofuranopyran compound can be obtained.

The utility model relates to a continuous casting process stuffing sand collecting device which comprises a stuffing sand receiving hopper, a cross beam rod, a lead screw guide rail, a support and a movable sliding rail, the stuffing sand receiving hopper is connected to one end of the cross beam rod, and the other end of the cross beam rod is connected with the lead screw guide rail and can be driven by a lead screw guide rail motor to move horizontally. The lead screw guide rail is fixed to the top of the support, the support walks along the movable sliding rail, and the movable sliding rail is arranged on one side of the tundish. Aiming at the problems of time and labor waste and potential safety hazards in the prior art, the ladle filler sand in the ladle nozzle can be quickly and safely collected, and the purity of molten steel is improved.

The utility model discloses a portable mouth opening training device, which comprises a first plier body, a second plier body and a shear shaft, the first plier body and the second plier body are connected through the shear shaft, the first plier body comprises a first plier arm, a first handle ring is arranged at the rear end of the first plier arm, a first jaw is arranged at the front end of the first plier arm, and the second plier body comprises a second plier arm. A second handle ring is arranged at the rear end of the second clamp arm, a second jaw is arranged at the front end of the second clamp arm, a limiting knob is spirally connected to the second clamp arm, a dial gauge is fixedly connected to the second clamp arm, and the first clamp arm slides on the dial gauge. The first plier body, the second plier body, the shear shaft, the dial gauge and the limiting knob are all made of stainless steel materials. By the adoption of the technical scheme, the requirement of people for freely adjusting the opening angle can be met, the structure is simple, a patient can operate the device by himself / herself, and the opening and closing training effect is achieved.

The present invention belongs to the technical field of hydrogenation methanol catalytic materials, and particularly relates to a method for preparing a high-surface-area amorphous zirconium oxide catalytic material, which comprises the following steps: S1, adding zirconium nitrate to ethanol, ultrasonically dissolving, adding propylene oxide for a first contact reaction, and obtaining solution I; S2, subjecting solution I to a hydrothermal reaction, drying and crushing the obtained substance, and obtaining amorphous zirconium oxide; S3, adding amorphous zirconium oxide to water, ultrasonically dispersing, adding a metal salt for a second contact reaction, and obtaining solution II; S4, adding an aqueous solution of ammonium carbonate to solution II for a third contact reaction, and after the reaction is completed, centrifuging, drying, crushing, and calcining the obtained substance to obtain a product. It has the advantages of low preparation cost, simple and safe operation, short reaction cycle, and good product repeatability; the obtained amorphous zirconium oxide catalytic material with a high surface area has the advantages of low cost, high catalytic activity, and high thermal stability.

The application discloses a synthesis method of (+)-Dracocephalone A, (+)-Dracocequinone A and (-)-Dracocequinone B, and belongs to the technical field of drug synthesis. The method is to take 2-isopropylanisole as a starting material, and the target product is obtained through a series of reactions including Fletcher asymmetric conjugate addition, intramolecular alpha-arylation, peroxide-mediated C(sp3)-H cyclization and disulfuration-triggered oxygen bridge reorganization. The method has the advantages of simple steps, easy availability of raw materials and catalysts, low cost, high yield, environmental friendliness and facilitation of industrial production.

The present invention provides an elevator double-sided folding car door, which relates to the field of elevators, and comprises two groups of left-right symmetrical folding door bodies and an electric drive system. One side of the two groups of folding door bodies is hinged to the vertical frame of the car. When the car door is opened, the electric drive system drives the two groups of folding door bodies to fold and close to the two sides of the car. The door machine width of this patent is not greater than the car width, and the limited shaft space can be fully utilized. The folding car door comprises two groups of left-right symmetrical folding door bodies, so the width of a single group of folding door bodies is relatively small. When the folding car door is opened, the electric drive system drives the two groups of folding door bodies, eliminating the need for passengers to manually open and close the car door. Moreover, the extension range of the single group of folding door bodies is located on both sides of the car, and the extension range is small, thereby effectively improving passenger comfort.

This utility model discloses an elevator water-blocking device with a water-blocking function, including a water-blocking gate, a servo motor, a reel, and a lifting steel wire. The servo motor and the reel are located above the sill of the elevator hall door. The lifting steel wire connects the water-blocking gate and the reel. The servo motor controls the rotation of the reel and the lifting steel wire, causing the water-blocking gate to be transported to the sill of the elevator hall door for storage or to the floor of the hall door for water blocking. An elevator system incorporating this water-blocking device is also disclosed. This utility model features a concealed and aesthetically pleasing design, is easy to install, and provides active and efficient water-blocking sealing. It forms a physical watertight barrier, effectively preventing external floodwater from flowing into underground spaces, protecting underground equipment from water damage, and is suitable for various newly built or existing locations.

The invention belongs to the technical field of thermoelectric material preparation, and particularly relates to a high-thermoelectric-performance PEDOT: PSS / CNTs thermoelectric composite film and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing PEDOT: PSS and CNTs to obtain a mixed solution; coating a substrate with the mixed solution to obtain a PEDOT: PSS / CNTs composite film; and carrying out surface treatment on the PEDOT: PSS / CNTs composite film by using an ionic liquid methanol solution to obtain the PEDOT: PSS / CNTs thermoelectric composite film. The PEDOT: PSS / CNTs thermoelectric thin film with high thermoelectric performance is obtained simply through two steps of operation of a physical blending method and ionic liquid surface treatment, the preparation method is simple, the thermoelectric performance is remarkably improved, and the obtained PEDOT: PSS / CNTs thermoelectric thin film has relatively high conductivity and Seebeck coefficient and also has a relatively high power factor.