1313 results about "Vacuum pumping" patented technology

The present invention relates to a food packaging device, and particularly to a rotary vacuum pumping device for a food packaging device. The present invention provides the following technical solutions: A rotary vacuum pumping device for a food packaging device includes a turntable and a vacuum pumping assembly. The vacuum pumping assembly includes a base and a cover body. An opening and closing cover driving mechanism is provided between the turntable and the vacuum pumping assembly. A support frame is provided on the turntable. The cover body is connected to the support frame through a support arm. A closing position tension adjusting member is provided between the support frame and the cover body; the base is hingedly connected to the turntable through a hinge block. The base has a linkage station. The support arm and the linkage station of the base are linked through a connecting rod. One end of the connecting rod extends between the two hinge points of the support arm and is hingedly connected to the support arm, and the other end is at the linkage station and is hingedly connected to the linkage station. By adopting the above technical solutions, a rotary vacuum pumping device for a food packaging device with energy saving, shortened vacuum pumping time, and simple structure is provided.

The invention provides an underground coal mine air and water pumping switching electro-hydraulic control system and method, the electro-hydraulic control system comprises an air supply control module, a water supply control module, a negative pressure control module and an oil supply module, and the method adopts a remote control system to control the underground coal mine air and water pumping switching electro-hydraulic control system. According to the underground coal mine air and water pumping switching electro-hydraulic control system, air and water pumping electric control rapid opening and closing and rapid switching of different functions are achieved, the automation degree of air and water pumping switching is improved, and the air and water pumping switching time is shortened; and meanwhile, when dangerous working conditions that gas accumulation exceeds the limit due to hole blocking behind the drill hole or carbon monoxide gas appears in the drill hole and the like, rapid and automatic response processing can be achieved. The air and water pumping conversion efficiency is improved, the labor intensity of workers is relieved, and key technical support is provided for coal mine underground automatic drilling whole-process operation.

The invention discloses a vacuum-assisted pultrusion preforming device for a composite material. The vacuum-assisted pultrusion preforming device comprises a yarn threading plate, a gum dipping tank, a gum extruding roller and a vacuum-assisted preforming mold which are sequentially arranged in the pultrusion direction, wherein fiber bundles penetrate through the yarn threading plate in a layered mode, the gum dipping tank is used for containing resin, and the gum extruding roller is used for extruding redundant resin. The vacuum auxiliary preforming mold is provided with a preforming mold cavity, a vacuum cavity is formed in one section of the preforming mold cavity of the vacuum auxiliary preforming mold, an air exhaust hole is formed in the upper portion of the vacuum cavity, and a semi-permeable membrane allowing gas to pass through but blocking resin to pass through is arranged at the air exhaust hole. And the air exhaust hole is externally connected with a vacuumizing device. The vacuum-assisted pultrusion preforming device can effectively discharge microbubbles in resin and fiber bundles, effectively control uniform distribution of the content of the resin and remarkably promote full infiltration of high-viscosity resin to fibers.

The invention discloses a vacuum pumping system and method. The vacuum pumping system comprises a cavity, at least one low-vacuum pumping pump set, at least one high-vacuum pumping pump set, a first pipeline and a second pipeline, and the low-vacuum pumping pump set communicates with the cavity through the first pipeline and the second pipeline; the low-vacuum air extracting pump set is communicated with the cavity through a first pipeline, the high-vacuum air extracting pump set is communicated with the cavity through a second pipeline, the controller is electrically connected to the low-vacuum air extracting pump set and the high-vacuum air extracting pump set, the controller sequentially controls on-off of the low-vacuum air extracting pump set and the high-vacuum air extracting pump set, and the low-vacuum air extracting pump set can extract pressure in the cavity to be lower than 0.1 Torr; the system comprises a low-vacuum air extracting pump set and a high-vacuum air extracting pump set, and the low-vacuum air extracting pump set and the high-vacuum air extracting pump set can be used for extracting the pressure in the cavity to be lower than 0.1 Torr and the pressure in the cavity to be in an ultrahigh vacuum state respectively. The grading air exhaust mode can more effectively improve the air exhaust efficiency and reduce the air exhaust time; and the equipment can be prevented from being in a high-load state for a long time, so that the service life of the equipment is prolonged.

The invention relates to the technical field of stator assembly glue pouring, in particular to a motor stator assembly glue pouring device and a glue pouring process, the motor stator assembly glue pouring device comprises a glue pouring mold, a positioning shaft and a glue pouring ring, the glue pouring mold comprises a lower mold base, an upper mold base and a plurality of connecting pieces; an annular cavity is defined by the outer peripheral surface of the positioning shaft and the inner walls of the lower die holder and the upper die holder, and the annular cavity is communicated with an axial groove of the stator assembly to jointly form a closed glue pouring cavity; the vacuumizing assembly is used for vacuumizing the glue filling cavity; the section of the glue pouring ring is of a W-shaped structure, the highest point in the middle of the glue pouring ring is located over the winding, and the two lowest points correspond to the inner side and the outer side of the winding respectively; a plurality of liquid injection holes are formed in the corners of the two lowest points at intervals in the circumferential direction. Through the W-shaped structure of the glue filling ring, the glue liquid is synchronously filled from the inner side and the outer side of the winding and is matched with immersion type rising, the problems of bubbles and air holes in traditional glue filling are solved, the insulation and heat dissipation performance is guaranteed, and the operation reliability of the motor is improved.

The invention discloses a local area inert gas protection auxiliary vacuum environment laser welding device and method, belongs to the technical field of laser welding, and aims to solve the problem that the laser welding quality of an existing easily-oxidized material is insufficient. A local area inert gas protection auxiliary vacuum environment laser welding device comprises a monitoring and feedback control system, a gas precise control system and a vacuum cavity, a gas nozzle, a workbench and a laser welding head are all arranged in the vacuum cavity, the laser welding head is located above the workbench, the gas nozzle is arranged on one side of the laser welding head, and the gas nozzle is arranged on the other side of the laser welding head. The vacuum pumping system is connected with the vacuum cavity, the laser welding head is connected with the laser welding machine, the gas precise control system controls the flow and the mixing proportion of inert gas jetted by the gas nozzle, and the monitoring and feedback control system monitors the temperature, the vacuum degree, the oxygen content and the plasma state of a welding area. And data are fed back to carry out closed-loop regulation control on various welding parameters. And the welding quality is greatly improved.

The invention relates to the field of laser detection, in particular to a sample mechanism for marine corrosion primary process detection, which comprises a sample box, a sample loading device for placing a sample plate is arranged in the sample box, and one side of the sample box is provided with an excitation interface and a detection interface. The upper portion of the communication port is connected with a three-way connector, the other two connectors of the three-way connector are used for air exhaust and water dripping respectively, the connector for air exhaust is connected with a vacuumizing pump, and the connector for water dripping is matched with a plugging cover. And the water dripping joint is connected with a water dripping pipe matched with a sample plate on the sample loading device. The communicating port is matched with the three-way joint, so that the vacuumizing operation can be completed through the communicating port, and meanwhile, the dripping operation can also be completed, so that the sample plate simulates a sample environment in which seawater is immersed, and a more accurate detection effect can be obtained.

The invention discloses a helium detection device and method for the airtightness of a bonding interface and a bonding microcavity, and belongs to the field of the airtightness of MEMS devices. The device comprises a sample holder, a mass spectrometer, a molecular pump, a mechanical pump and other components, helium is used as detection gas, and the helium is leaked only through a bonding interface through a customized and processed test sample and sample holder structure, so that the interference of other leaks in a non-bonding area on a test result is avoided. The testing method comprises the steps of sample introduction, vacuum pumping, helium filling, signal detection, dynamic and steady state testing and the like, the helium leak rate is monitored in real time by combining with a helium mass spectrometer, and the minimum leak detection rate is that high-sensitivity air tightness detection is ensured. According to the method, the airtightness of the bonding interface can be independently evaluated, and a reliable basis is provided for development of a novel bonding process. The method is suitable for air tightness detection and evaluation of the bonding process in MEMS device processing and manufacturing.

The invention discloses a full-automatic packaging assembly line for semiconductor material trays, which comprises a material taking and feeding mechanism, a material tray label tearing and pasting mechanism, a moisture-proof monitoring mechanism, a bagging and packaging helium detection mechanism and a boxing and packaging redetection mechanism which are arranged in sequence, and the assembly line realizes material tray grabbing, visual detection and overturning, old label tearing and new label pasting; the full-process automatic operation comprises the following steps of: automatically placing a humidity card and a drying agent, bagging an aluminum foil bag, vacuumizing, filling helium, carrying out heat sealing, carrying out helium detection, and finally automatically boxing, sealing, rechecking, labeling and stacking. By integrating multi-stage visual positioning and detection, double-path parallel heat sealing and closed-loop quality control, the packaging efficiency and precision are remarkably improved, the sealing performance, moisture resistance and traceability of product packaging are ensured, and the automatic packaging machine is particularly suitable for automatic packaging of precise electronic components such as semiconductors.

The invention provides a metal continuous casting device, and relates to the field of metal casting. The metal continuous casting device comprises a hot melting unit, a feeding unit is arranged above the hot melting unit, a heat preservation unit is arranged below the hot melting unit, a vibration crystallizer is arranged below the heat preservation unit, and a dummy ingot sealing unit is arranged at the outlet end of the vibration crystallizer. The vacuum pumping unit is communicated with the hot melting unit, the feeding unit and the heat preservation unit, the hot melting unit comprises a smelting cavity and a smelting crucible fixedly installed in the smelting cavity, the center of the bottom end of the smelting crucible is open and communicated with the heat preservation unit through a long nozzle, and a first stopper mechanism is fixedly installed above the smelting cavity. According to the metal continuous casting device, the smelting crucible is arranged in the smelting cavity, and the flowing of molten copper is controlled through the first stopper rod mechanism, so that a structure for driving the smelting crucible to feed can be reduced, feeding can be controlled more conveniently, and meanwhile, the device can be kept in a vacuum state conveniently.

The invention discloses a flexible gripper device, and relates to the technical field of mechanical automatic gripping, the flexible gripper device comprises a gripper mounted on a mechanical arm, the gripper further comprises a vacuum valve terminal, a plurality of vacuum gas guide holes used for being connected with a vacuum pumping pipeline are formed in one side of the vacuum valve terminal, and a plurality of adsorption holes are further formed in the bottom of the vacuum valve terminal; the vacuum air guide hole and the adsorption hole are communicated with the interior of the vacuum valve terminal to form an airflow path of a vacuum system; the buffer part covers the bottom area of the vacuum valve terminal and is connected with the bottom of the vacuum valve terminal; after starting, the mechanical arm drives the gripper to get close to an object, an elastic breathable material of the buffer part abuts against and extrudes the object during air exhaust, then the buffer part shrinks and deforms to fill a pit, after the object is adsorbed to be stable, the mechanical arm is lifted, the valve terminal keeps air exhaust, and the buffer part and the elastic counter-recoil mechanism buffer impact force brought by the object together. And the elastic counter-recoil mechanism deforms and rebounds to further buffer the impact force.

The utility model relates to the field of shoe mold design, and provides a shoe sole mold with a negative pressure maintaining function, the shoe sole mold comprises a lower mold and a heat insulation mold, the lower mold is provided with a mold cavity for forming a shoe sole, and the inner wall of the mold cavity is provided with a plurality of first negative pressure holes penetrating through the outer side face of the lower mold; the heat insulation die comprises a vacuum bottom die for fixing the lower die and heat insulation layers arranged on the inner walls of the vacuum bottom die, and when the lower die is fixed to the vacuum bottom die, a vacuum gap for heat preservation and heat insulation is formed between the lower die and the vacuum bottom die; a vacuum opening communicated with the vacuum gap is formed in the outer wall of the vacuum bottom die, and the vacuum opening is used for being matched with a first vacuumizing device of the machine table base to form negative pressure; the vacuum bottom die is provided with a one-way mechanism used for limiting gas from flowing back to the vacuum gap, and an unlocking mechanism is arranged between the vacuum bottom die and the lower die and used for eliminating negative pressure in the first negative pressure hole after the shoe sole is formed. On the basis, electric energy loss in the shoe sole forming process can be reduced, and the effects of saving energy and reducing consumption are achieved.

The application discloses a testing device and testing method for hydrogen isotope permeation parameters of fusion reactor application materials, relates to material testing technology in the hydrogen field, and belongs to the field of material testing technology in the hydrogen field. The testing device for hydrogen isotope permeation parameters of fusion reactor application materials comprises the following: a membrane sample is installed in a membrane testing cavity to divide the membrane testing cavity into a gas inlet sub-cavity and a permeation sub-cavity; a gas inlet tank is selectively communicated with the gas inlet sub-cavity to supply testing gas; a collecting tank is selectively communicated with the permeation sub-cavity to collect outflowing gas; a vacuum pumping structure is used for pumping the gas inlet sub-cavity and the permeation sub-cavity; a heating structure is used for heating the gas inlet sub-cavity and the permeation sub-cavity; a high-resolution mass spectrometer is selectively communicated with the permeation sub-cavity, and gas selectively flows into the high-resolution mass spectrometer. The testing device for hydrogen isotope permeation parameters of fusion reactor application materials can control the gas pressure and temperature in the two sub-cavities respectively, thereby accurately determining the hydrogen isotope permeation parameters of the materials, and the precision is high, and the data resolution is excellent.

The invention relates to the technical field of scanning electron microscopes, in particular to a scanning electron microscope which comprises a mounting frame, an electron microscope body, a vacuumizing mechanism, an adapter, a damping mechanism and a vacuum tube structure, the electron microscope body comprises a lens cone and a sample bin, and the vacuumizing mechanism is used for synchronously vacuumizing the lens cone and the sample bin; the damping mechanism is arranged between the mounting rack and the electron microscope main body; the adapter comprises an adapter tube, a first joint and a second joint, and the first joint and the second joint are arranged on the two sides of the adapter tube; the vacuum tube structure comprises a first flexible tube, a first rigid tube, a second flexible tube and a second rigid tube, and the first flexible tube and the second flexible tube are symmetrically arranged. Due to the fact that the flexible pipes are connected with the vacuumizing mechanism and the rigid pipe is connected with the electron microscope body, the symmetrical flexible pipes can balance pulling force in the vacuumizing process, the influence of the pulling force on the electron microscope body is reduced, the influence on the image quality is reduced, and the detection accuracy of the scanning electron microscope and the definition of images are effectively guaranteed.

The invention provides a novel vacuum evaporator which comprises a vacuumizing system, a carrier rotating system, a light-operated integrated system, a crystal oscillation system, a heating system, a water cooling system and an evaporation system, and the light-operated integrated system and the crystal oscillation system are arranged in a hollow cavity of a first rotating mechanism, so that cooperative work of rotary coating and real-time detection is realized; a detection light path is shortened, and the signal-to-noise ratio is improved; rotation axis detection ensures data representativeness; the top radiation heating and the side wall conduction heating have a synergistic effect, so that the surface temperature difference of the substrate is smaller than + / -1.5 DEG C, the cooling efficiency of the evaporation system is improved by 40% through the water cooling system, the equipment is highly integrated through the modular architecture design, and the space is saved by 30% through the coaxial design of the carrier rotating system and the detection system; a rotating system, a heating system and a detecting system are cooperatively controlled, a dynamic compensation algorithm automatically adjusts the evaporation rate and the carrier rotating speed by comparing light control data with crystal oscillator data in real time, the film thickness control precision is + / -2 nm, and the refractive index deviation is smaller than 0.5%.

The invention provides a machining method for improving the yield of a 2K negative pressure aluminum plate-fin heat exchanger. The machining method comprises the steps that a core body is manufactured; manufacturing an end socket; the core body is connected with the end socket to manufacture the heat exchanger; normal-temperature detection is conducted on the heat exchanger; performing low-temperature detection on the heat exchanger; the heat exchanger is subjected to cold shock treatment, and the background leakage rate and the vacuum degree of each heat exchange channel in the heat exchanger and the background leakage rate and the vacuum degree of the sealing device in the cooling process are obtained; and under the condition that the temperature is reduced to the preset temperature threshold value, low-temperature helium mass spectrum leakage detection is conducted on the heat exchanger, after low-temperature helium mass spectrum leakage detection is conducted, secondary vacuumizing is conducted, then third-time vacuumizing is conducted, the circulation is conducted till ith vacuumizing is conducted, and the total leakage rate is calculated, and i is an integer larger than 3. The heat exchanger with the micro leakage rate, high mechanical strength, compact size and high cleanliness can be obtained, and the machining efficiency and the yield are improved.

The embodiment of the utility model provides a miniature vacuum pump and a miniature vacuumizing device, the miniature vacuum pump comprises an air collection and exhaust chamber provided with an air inlet nozzle and an exhaust hole, a leather cup assembly, a driving motor and a vacuum breaking assembly, and the vacuum breaking assembly comprises an air inlet hole penetrating through the bottom wall of the air collection and exhaust chamber; the pressing plate is movably sleeved on the section of the output shaft in the collecting and exhausting chamber and correspondingly and movably covers the air inlet hole; the rotating seat is coaxially and fixedly assembled on the output shaft and located on the side, away from the bottom wall, of the pressing plate, and a pivoting frame is arranged on the outer side face of the rotating seat in a protruding mode; the centrifugal swing rod is pivoted on the pivoting frame by virtue of a pivot shaft perpendicular to the output shaft, the gravity center of the centrifugal swing rod is arranged at one end far away from the rotating seat, and one end, close to the rotating seat, of the centrifugal swing rod is bent and extends towards the direction of the pressing plate to form a pressing part for pressing the pressing plate; the reset elastic piece is used for pushing the pressing plate in the direction away from the bottom wall so that the air inlet can be communicated with the inner cavity of the air collecting and exhausting chamber. According to the embodiment, vacuum discharging operation can be achieved without an electromagnetic valve.

The invention discloses a power plant condenser steam injection vacuumizing system and method, and belongs to the technical field of electric power engineering. The system comprises an environmental parameter monitoring module which is used for monitoring and collecting key parameters of an external environment of a power plant in real time; the unit operation parameter acquisition module is used for performing high-precision real-time acquisition on unit core operation parameters to form unit dynamic operation characteristic data; the steam loop state detection module is used for detecting state information in a steam loop on line; the multi-stage steam ejector group automatically switches stage configuration according to different working conditions, and realizes graded adjustment of the vacuumizing capacity of a condenser; the electric regulating valve group is used for accurately regulating the steam supply quantity of each ejector channel to realize dynamic matching of flow and pressure; the intelligent bypass control module is used for stably regulating and controlling the switching process of the ejector based on amplitude limiting and anti-oscillation logic; and the self-learning parameter library module is used for recording and updating optimal operation parameter combinations under different working conditions.

The invention discloses an intelligent automatic control rotary evaporator, and belongs to the technical field of chemical instruments. An intelligent automatic control rotary evaporator comprises a bottom box and a heating pot, a rotary machine head is installed on the bottom box, a condenser and an evaporation bottle are installed on the rotary machine head, and the lower end of the condenser is connected with a collection bottle; precise adjustment of the height and the inclination angle of the evaporation bottle is achieved through the electric telescopic rod and the rotating shaft, and the assembly and disassembly process of components is simplified through the bottle retreating locking nut, the condensation installation nut and other structures; heating temperature control automation is realized by combining a temperature sensor and a control box, and constant-speed rotation of the evaporating flask is ensured through motor driving; the stability of the condenser is enhanced by means of a first adjusting rod and a fixing sleeve, and material adding in a vacuum environment is achieved by integrating a deflation charging valve and a vacuum extraction opening; the control box integrates a multi-module control function, supports the replacement of parts of different specifications, remarkably improves the adjustment convenience, operation efficiency, temperature control precision and experiment adaptability of equipment, and is high in automation degree.

The invention provides a method for measuring a sample hole, and relates to the technical field of semiconductors, and the method comprises the steps: marking a first target surface of a to-be-measured sample, and determining the region range of a target hole of the to-be-measured sample located in the to-be-measured sample through the first target surface; coating the first target surface of the to-be-detected sample to form a glue protective layer; depositing metal on the glue protection layer to form a metal protection layer; the material of the glue protection layer comprises M-Bond 610, and the material of the metal protection layer comprises metal platinum; the thickness of the glue protection layer is 500 nm to 1 [mu] m, and the thickness of the metal protection layer is 300 nm to 600 nm; etching along the second target surface of the to-be-tested sample until the target hole is exposed; sampling the to-be-tested sample with the exposed target hole to obtain a sample piece with the target hole; detecting a target hole; after the first target surface of the to-be-detected sample is coated to form the glue protection layer, the method further comprises the following steps: performing vacuum pumping to remove gas in the target hole.

The invention discloses a preparation method of surface metallized ceramic particles and a ceramic wear-resistant accessory, and mainly solves the technical problems of high cost, poor product performance, low yield and the like in the existing ceramic composite material preparation method. The preparation method of the surface metallized ceramic particles comprises the steps that wrapping alloy and ceramic particles with the volume ratio being (0.5-1.5): (8.5-9.5) are prepared, and the wrapping alloy comprises active metal, auxiliary welding metal and melting metal with the mass ratio being (15-40): (60-80): (0-10); the method comprises the following steps: mixing ceramic particles and a coating alloy, filling the mixture into a coating reaction tube, vacuumizing, heating, injecting reducing gas and / or protective gas, vacuumizing again, heating, completely reducing surface oxides of auxiliary welding metal and melting metal, vacuumizing again, heating to 900-1250 DEG C, melting the coating alloy, preserving heat, keeping the temperature at normal temperature, and cooling to room temperature. And surface metallization ceramic particles are obtained. The method is short in time, low in energy consumption and higher in production efficiency.

The embodiment of the invention provides a vacuum glue filling production line, and relates to the technical field of vacuum glue filling equipment, the vacuum glue filling production line comprises a rack, a feeding station and a discharging station, the feeding station and the discharging station are arranged on the rack, a vacuum glue filling and pressure maintaining integrated station is arranged on the rack, and auxiliary vacuumizing stations are arranged on the upstream side and the downstream side of the vacuum glue filling and pressure maintaining integrated station. The two auxiliary vacuumizing stations are connected with the feeding station and the discharging station correspondingly, the vacuum glue filling and pressure maintaining integrated station comprises a vacuum box installed on the rack, a vacuum pump and a glue filling device are arranged on the vacuum box, and a plurality of moving stations used for supporting trays and parts are arranged in the vacuum box. A pressure maintaining conveying device is arranged in the vacuum box and used for transferring the moving stations, so that the empty moving stations are transferred to the position below the glue pouring device, and the glue-poured parts are transferred to a downstream auxiliary vacuumizing station after being transported for a certain time. The glue filling device has the effect of improving the glue filling efficiency.

The invention discloses a dredged mud upper and lower part double-face combined vacuum consolidation drainage method, which comprises the following specific implementation processes: laying a horizontal sand bag containing a PVC (Polyvinyl Chloride) pipe and a vertical drainage pipe at the bottom of a cofferdam foundation pit to serve as a bottom drainage system, blowing and filling dredged mud in a layered manner, controlling the thickness and the water content of each layer, and when the water content of a soil body is lower than twice liquid limit, stopping drainage; starting the bottom vacuum water pumping device to perform preliminary water drainage, inserting straw bundles into the soil body through hollow pipes with bottom covers to form a vertical water drainage structure after the strength of the soil body meets the requirement, sequentially laying geotechnical cloth, a straw woven blanket, a PVC water drainage pipe network and a sealing film on the top to construct a top vacuum system, and finally synchronously starting the top vacuum water pumping device and the bottom vacuum water pumping device. The vacuum difference is controlled by adjusting the ventilation device, and upper and lower double-face combined vacuum consolidation drainage is achieved. The drainage consolidation of the dredged mud is effectively accelerated, the treatment efficiency is improved, and the drainage effect is enhanced through precise control over the vacuum degree and application of materials such as straw.

The present invention provides a film layer for a perovskite solar cell, a preparation method thereof, and a preparation device. The film layer preparation device includes a reaction chamber and a vacuum pumping device communicated with the reaction chamber. A rotating device is arranged at the bottom of the inner cavity of the reaction chamber, and the space above the rotating device is divided into at least two working areas in the counterclockwise or clockwise direction; among the at least two working areas, at least one working area is communicated with a first gas source through a pipeline, and at least one working area is communicated with a second gas source through a pipeline. The present invention can obtain a high-quality film layer while greatly shortening the preparation time, meeting the requirements of industrialization.

The invention discloses a multi-stage isolation high vacuum obtaining system of a neutral beam injection device and a control method, and relates to the field of nuclear fusion Tokamak vacuum pumping design. The low-temperature pump unit comprises a plug-in low-temperature pump in a neutral beam vacuum chamber, and the plug-in low-temperature pump is used for refrigerating and cooling liquid nitrogen and liquid helium to adsorb gas to realize vacuum pumping; the low-temperature pump preceding-stage air extractor unit comprises a molecular pump unit, a roots pump unit and a mechanical pump unit; an inlet of the molecular pump set is connected with the neutral beam vacuum chamber through a gate valve, and an outlet of the molecular pump set is connected with an inlet of the roots pump set through a forestage valve. An inlet of the roots pump set is connected with the neutral beam vacuum chamber through a preceding stage valve and a pre-pumping valve, and an outlet of the roots pump set is connected with the mechanical pump set through the preceding stage valve. By adopting a multi-stage vacuum shielding technology and a step-by-step start-stop strategy, step-by-step transition from low vacuum to high vacuum and from high vacuum to low vacuum can be efficiently, stably and reliably realized, and an air extractor unit and a vacuum environment are protected from being polluted.

The invention provides a multi-melting-machine collaborative vacuumizing control system and control method, and belongs to the technical field of quartz crucible manufacturing, the multi-melting-machine collaborative vacuumizing control system comprises a main controller, a main vacuumizing assembly, a plurality of branch vacuumizing assemblies and a plurality of melting machines; the main vacuumizing assembly is connected with the multiple branch vacuumizing assemblies through the vacuum main pipeline, and the multiple branch vacuumizing assemblies are connected with the multiple melting machines in a one-to-one correspondence mode through the melting machine connecting vacuum pipes. The main vacuumizing assembly comprises a vacuum pump, a first pneumatic valve, a first proportional electromagnetic valve, a vacuum tank and a vacuum main valve which are connected in sequence; the branch vacuumizing assembly comprises a vacuum proportion regulating valve, a buffer tank and a vacuumizing valve which are connected in sequence; a vacuum tank is arranged, and the vacuum pressure in the vacuum tank is kept constant by controlling a first pneumatic valve and a first proportional electromagnetic valve; the buffer tanks are arranged on the branches, and the vacuum pressure in the buffer tanks is controlled by the vacuum proportioning valves to be kept constant, so that a stable vacuum system is formed in the melting process of the quartz crucible.

The invention provides a wind power operation and maintenance robot control system based on an intermittent negative pressure adsorption device. The wind power operation and maintenance robot control system comprises a central control unit, a signal detection unit and a wind power operation and maintenance robot. The wind power operation and maintenance robot comprises a frame, a moving chassis and an intermittent negative pressure adsorption device. The intermittent negative pressure adsorption device comprises two suction cups alternately adsorbed to the wind turbine blade in an intermittent mode. The signal detection unit comprises an air cylinder position sensor, a contact type position sensor, a direction sensor and a camera. The central control unit comprises a main control unit and an element control unit; the main control unit is used for controlling the brushless direct current motor to rotate forwards or reversely or stop working through the element control unit according to the signal fed back by the signal detection unit, controlling the suction cup air cylinder to be powered on or powered off and controlling the suction cup to be powered on or powered off through the element control unit. The motion module and the working module of the robot are remotely controlled in a wireless remote control mode, and the working efficiency is improved.

The utility model discloses an optical lens wiping machine for manually wiping a lens. The optical lens wiping machine comprises a workbench, a vacuum chuck assembly, a rotary driving mechanism and an optical lens centering mechanism, the vacuum chuck assembly comprises a vacuum chuck, a main shaft and a vacuum generating device; the main shaft is rotatably arranged on the workbench in the vertical direction, and the vacuum suction cup is installed at the top end of the main shaft. A vacuumizing channel is arranged in the main shaft and communicated with the vacuum suction cup and the vacuum generating device. The rotation driving mechanism comprises a power source and a transmission mechanism, and the power source is in transmission connection with the spindle through the transmission mechanism to drive the spindle to rotate. The optical lens centering mechanism comprises a pair of centering assemblies arranged on the two opposite sides of the vacuum suction cup respectively, each centering assembly comprises a guide rail support, a guide rail and a centering push block, the guide rails are arranged on the guide rail supports, and the centering push blocks are arranged on the guide rails in a sliding mode. The large-diameter optical lens wiping device can improve the efficiency of manually wiping a large-diameter optical lens, and is simple in structure.

The invention discloses a power battery pole coiled material composite coating system and method based on plasma activation, and relates to the technical field of power battery pole material manufacturing. The unwinding device consists of an unwinding roller, a tension sensor and a speed regulator, and conveys the pole coiled material at constant tension and speed; the cavity is a sealed vacuum cavity, is provided with an electrode plate, a gas ingress pipe and a vacuum extraction opening, and is internally provided with a detector for monitoring a plasma state; the coating chamber comprises a first coating chamber, a second coating chamber and a transition vacuum cavity; a thickness gauge, a spectrograph and the like are used for monitoring film layer parameters; graded cooling is adopted, and the gas humidity is controlled; the coiled material winding module is used for maintaining tension stability and correcting deviation; and communicating with each module, adjusting parameters and generating a log. According to the invention, the activation consistency of the pole coiled material and the adhesion force of the film layer are improved, the thickness uniformity and density of the coating film are optimized, multi-parameter monitoring is perfected to find defects in time, the stress of the film layer is reduced by graded cooling, the performance and production efficiency of the pole material are guaranteed, and the manufacturing requirements of power batteries are met.

The invention relates to the technical field of solar cells, in particular to a high-uniformity large-size perovskite film annealing device which comprises a heating system, an adsorption system, an atmosphere control system, a heat preservation system, a data processing and control system and a supporting system. The heating system comprises a heating unit and a heat conduction unit, the heating unit is integrally electrically controlled to heat, an adsorption groove is formed in the plate face of the heating unit, the adsorption system enables a film layer base body to be attached to the heating unit through air suction of a vacuum pump so as to resist instant temperature difference warping, and the atmosphere control system comprises a furnace body with a gas pipeline and an atmosphere compensation base plate so as to regulate and control the atmosphere. According to the high-uniformity large-size perovskite film annealing device, uniform heating and precise atmosphere control of a film layer can be achieved, the quality and stability of a perovskite film are improved, the problems that existing annealing defects are many, and film forming uniformity is poor are solved, and the high-uniformity large-size perovskite film annealing device is suitable for large-scale production. The method is suitable for large-size film annealing.