2508 results about "Vacuum tube" patented technology

A vacuum insulating panel may include: a first substrate; a second substrate; a plurality of spacers provided in a gap between at least the first and second substrates, wherein the gap is at pressure less than atmospheric pressure; a pump-out / evacuation tube extending at least partly into an aperture in one of the substrates; and a pump-out / evacuation tube seal. The pump-out / evacuation tube seal may include at least one of: (a) from about 20-80 wt. % tellurium oxide, the tellurium oxide comprising TeO4 and TeO3, wherein the pump-out tube seal comprises more TeO3 than TeO4 by wt. %; and / or (b) tellurium oxide and from about 10-50 wt. % vanadium oxide, wherein the pump-out tube seal by wt. % comprises more tellurium oxide than vanadium oxide, and wherein the vanadium oxide comprises VO2 and V2O5, and wherein more V in the pump-out tube seal is in a form of VO2 than V2O5. A substantially donut-shaped laser beam may be used to heat pump-out tube material in order to form a pump-out tube seal.

The invention discloses a vacuum adsorption device and an adsorption method, the device comprises a carrying table and a driving device, vacuum holes and sealing holes which are distributed in a staggered manner are formed in the surface of the carrying table, and a plurality of independently controlled vacuum areas are formed. Each area is provided with an independent vacuum pipeline, a pressure controller and a switch, and precise negative pressure regulation and control are achieved. The lifting sealing ring is arranged in the sealing hole, the height is adjusted through the driving device, and the position of the sealing ring and the warping state of the wafer are monitored in real time through the detection device. In the adsorption process, if warping exists, the height of the sealing ring is automatically adjusted, the wafer is flattened step by step in a subsection adsorption mode of subarea control, and global adsorption is started after the heights of all the sealing rings are consistent. According to the method, the problem that a traditional adsorption mode is poor in adaptability to large-warping wafers is effectively solved through the partition control and dynamic adjustment technology, the method has the advantages of being stable in adsorption, uniform in stress, low in breakage rate and the like, and the process compatibility and the production yield are remarkably improved.

The invention discloses a beam current testing device for accelerator beam current debugging, which comprises an integrated short-distance testing device without a focusing or deflecting magnet, and is characterized in that the testing device comprises a vacuum chamber, and at least two beam current position detectors are integrated on the vacuum chamber along the beam current ejection direction of an accelerator; the two beam position detectors connected with the vacuum chamber are symmetrically arranged on the two sides of the vacuum chamber, and the center distance is adjustable; the vacuum pipeline where the beam position detector is located is coaxially provided with a flow intensity measuring device and a beam garbage target, and the flow intensity measuring device is provided with an insulation sealing structure for preventing generation of mirror current; and a vacuumizing device is also integrated on the vacuum chamber. The testing device is not provided with any magnet, does not focus or deflect the beam current, is simple in structure, achieves the measurement of the beam current intensity, beam current energy and beam spot size through the simplest structure, is small in installation space, meets the requirements of ACCT current intensity measurement for isolating mirror current, and can be flexibly installed according to the needs.

The utility model discloses an intelligent primary and secondary fusion complete pole-mounted circuit breaker, which relates to the technical field of power grid equipment and comprises a base and a plurality of poles, each pole is provided with a first conductive pole and a third conductive pole, and the first conductive pole and the third conductive pole are provided with contacts in vacuum tubes. An insulating column is fixedly connected to the third conductive column, the operating mechanism is arranged in the base, the operating mechanism serves as a power source for driving the insulating column to move, and the operating mechanism comprises an electromagnetic coil, a driving rod, a linkage mechanism and a locking mechanism; the electromagnetic coil is fixed in the base, the driving rod is supported in the base in a sliding mode, and a movable iron core matched with the electromagnetic coil is arranged on the driving rod. The insulating column in each pole is in transmission connection with the driving rod through a linkage mechanism; the locking mechanism comprises a first locking mechanism and a second locking mechanism, and the pole-mounted circuit breaker can effectively reduce the energy consumption of the pole-mounted circuit breaker during working through optimizing the operating mechanism.

The invention discloses a multidimensional monitoring system of an on-load tap-changer for a converter transformer and a fault prediction method, the system comprises a motor, a change-over switch core and other parts, and a data acquisition module is provided with a current, vibration and oil chromatography acquisition unit and a vacuum tube life monitoring unit. The current sensor collects motor current, the vibration sensor collects vibration signals of the change-over switch, the oil chromatography collection unit analyzes an oil sample, and the vacuum tube life monitoring unit evaluates the residual life of the vacuum tube. And a data transmission and processing analysis module. The fault prediction method comprises the steps of data acquisition, preprocessing, multi-dimensional data fusion, fault prediction model construction, feature extraction and selection, fault prediction and evaluation and the like. And screening characteristic parameters and fusion data by adopting a plurality of technical means, and constructing a machine learning model to predict faults. According to the invention, multi-source data acquisition and multiple analysis methods are integrated, the equipment state can be comprehensively reflected, the monitoring reliability is improved, faults can be predicted in advance, and the equipment fault rate is reduced.

Kidney stone removal system is disclosed having components including a handle mechanism, a nozzle tip, and a guiding device. The handle mechanism employs a trigger that enables control of irrigation and vacuum / suction. Depression of a trigger in the trigger mechanism conveys status of vacuum / suction and irrigation to a user by providing increased resistance at different points of depression. When the trigger is in a home (undepressed) position, irrigation and vacuum / suction are turned off. When the trigger is in a fully depressed position, irrigation and vacuum / suction are turned on. When the trigger is in an intermediate position, irrigation may be turned on, while vacuum / suction remains turned off. The nozzle includes one or more irrigation ports positioned at a distal end of the nozzle and having an irrigation port departure angle of 30 to 60 degrees for directing irrigation fluid forward and laterally from the distal end of the nozzle. The guiding device is configured to be removably positioned in the nozzle for receiving a debris fragmentizing device, such as a laser device. The guiding device is configured to prevent an unintended movement of the fragmentizing device when the fragmentizing device is positioned in the nozzle while allowing fluid and debris to flow past the fragmentizing device and through a vacuum tube.

The invention relates to the field of high-temperature anti-oxidation coatings, in particular to a tantalum-tungsten alloy surface high-temperature anti-oxidation composite coating and a preparation method thereof.The coating is composed of two layers of coatings with different components, the thermal expansion coefficients of the coatings and a base body are matched, the thermal expansion coefficients of the coatings are matched, and residual stress and thermal stress are reduced. The coating is prepared by adopting an embedding boriding and slurry melting method, and the used material components comprise ZrB2, MoSi2, 8YSZ, B, La2O3, Al2O3, NaF, TaSi2 and the like. The preparation method specifically comprises the following steps: putting a substrate into embedding powder for boronizing treatment, then mixing a coating material with ethanol and a binder, putting the mixture into a ball mill for wet mixing to prepare coating slurry, spraying the coating slurry on the surface of the substrate, and putting the substrate into a vacuum tube furnace for sintering to prepare a coating, thereby obtaining the high-temperature anti-oxidation composite coating. The binding force between the developed coating and the tantalum-tungsten alloy matrix is strong, and the tantalum-tungsten alloy matrix can be protected from oxidation corrosion or the oxidation rate can be slowed down within 500-2500s at the high temperature (2000 DEG C or above).

The invention provides a mechanical arm, cleaning equipment, a control method and a computer readable storage medium, and relates to the technical field of cleaning. The mechanical arm comprises a base, the base comprises a fixed part and a rotating part, and the rotating part is rotationally connected with the fixed part. And the folding arm comprises a plurality of connecting arms which are rotationally connected, the folding arm comprises a first end part and a second end part, and the first end part is rotationally connected with the rotating part. The clamping jaw is arranged at the second end of the folding arm, the clamping jaw is rotationally connected with the second end, and the clamping jaw is used for executing the grabbing action. And the dust suction pipe is arranged on the folding arm, one end of the dust suction pipe is provided with a dust suction nozzle, the dust suction nozzle is located at the end, away from the second end, of the clamping jaw, the dust suction nozzle communicates with the dust suction pipe, and the dust suction pipe cleans the to-be-cleaned area through the dust suction nozzle. According to the mechanical arm, by arranging the clamping jaw and the dust collection pipe, the grabbing and dust collection functions can be achieved, the functions of the mechanical arm can be enriched, and the user experience feeling is improved.

The utility model discloses a plasma degumming machine and relates to the field of degumming machines. The plasma glue removing machine comprises a machine frame body, a lower cavity base is arranged on the machine frame body, an upper cavity base is rotationally connected to the machine frame body, a process gas inlet pipe is arranged on the upper cavity base, a water cooling electrode is arranged in the lower cavity base, and a vacuumizing pipeline and a water cooling pipeline are arranged at the bottom of the water cooling electrode. When the plasma degumming machine is used for degumming, the lower cavity seat and the upper cavity seat are circular cavities and are more suitable for wafer degumming, plasma degumming belongs to dry type degumming, most degumming processes are suitable, degumming is more thorough, efficiency is higher, a circular water-cooled electrode is adopted, discharge uniformity is guaranteed, plasma generation is more uniform, and a better degumming effect is achieved. And the water-cooling connecting assembly is matched, circulating water is connected, heat in the degumming process is taken away, and the degumming effect is guaranteed.

Kidney stone removal system is disclosed having components including a handle mechanism, a nozzle tip, and a guiding device. The handle mechanism employs a trigger that enables control of irrigation and vacuum / suction. Depression of a trigger in the trigger mechanism conveys status of vacuum / suction and irrigation to a user by providing increased resistance at different points of depression. When the trigger is in a home (undepressed) position, irrigation and vacuum / suction are turned off. When the trigger is in a fully depressed position, irrigation and vacuum / suction are turned on. When the trigger is in an intermediate position, irrigation may be turned on, while vacuum / suction remains turned off. The nozzle includes one or more irrigation ports positioned at a distal end of the nozzle and having an irrigation port departure angle of 30 to 60 degrees for directing irrigation fluid forward and laterally from the distal end of the nozzle. The guiding device is configured to be removably positioned in the nozzle for receiving a debris fragmentizing device, such as a laser device. The guiding device is configured to prevent an unintended movement of the fragmentizing device when the fragmentizing device is positioned in the nozzle while allowing fluid and debris to flow past the fragmentizing device and through a vacuum tube.

The invention provides a p-type AgSbSe2-based thermoelectric material with low thermal conductivity and a preparation method and application thereof, the chemical composition of the p-type AgSbSe2-based thermoelectric material with low thermal conductivity is Ag1 + ySb1-x-yBixSe2, x is more than 0 and less than or equal to 0.09, y is more than or equal to 0.01 and less than or equal to 0.02, and x and y are the ratio of the amount of substance. The preparation method of the thermoelectric material comprises the following steps: performing vacuum tube sealing on Ag particles, Bi particles, Sb particles and Se particles according to the mass ratio, sintering the sealed quartz tube in a muffle furnace, and cooling to obtain an alloy ingot; and grinding the alloy ingot to obtain powder, and sintering the powder to obtain the p-type AgSbSe2-based thermoelectric material. The p-type AgSbSe2-based thermoelectric material with low thermal conductivity has good conductivity and Zebeck coefficient, and low lattice thermal conductivity at low temperature, and the thermoelectric performance of the thermoelectric material is significantly improved.

Systems and methods are disclosed for concentric suction cup tools with integrated air chambers. In one embodiment, an example picking assembly may include a vacuum manifold having a first integrated air pressure path and a second integrated air pressure path, and a first piston subassembly that includes a first air pipe, a first vacuum pipe, a first bushing disposed between the first air pipe and the first vacuum pipe, and a first suction cup, where the first piston subassembly is configured to independently actuate from a retracted position to an extended position. The picking assembly may include a second piston subassembly having a second air pipe, a second vacuum pipe, a second bushing disposed between the second air pipe and the second vacuum pipe, and a second suction cup, where the second piston subassembly is configured to independently actuate from the retracted position to the extended position.

According to the adsorption device, the semiconductor equipment and the adsorption method, in the adsorption device, a central suction area is defined through an annular structure, and the top of the annular structure is higher than a supporting surface, so that when a wafer is placed on the adsorption device, the annular structure and the peripheral area of the wafer can form a contact fit boundary; when the interior of the annular structure is vacuumized under the cooperation of the vacuum pipeline and the suction structure, the annular structure is beneficial to forming a relatively closed negative pressure space or a negative pressure space with a high flow resistance boundary between the wafer and the supporting surface, especially in the central area. According to the technical scheme, the vacuum suction effect can be more effectively concentrated in the central area limited by the annular structure, so that the effective pressure difference and the vacuum adsorption force applied to the wafer in the central area limited by the annular structure are increased, the wafer can be smoothly adsorbed, and subsequent process treatment is facilitated.

The invention relates to an L-shaped vacuum pipeline temperature control method and system and an intelligent terminal, and relates to the technical field of temperature control, and the method comprises the steps: obtaining the type information of a test material and the temperature detection information of each section of an L-shaped vacuum pipeline; calling a temperature detection value and a detection position point based on the temperature detection information; analyzing and determining a temperature reference value according to the detection position point and the test material type information; calculating a difference value between the temperature detection value and the temperature reference value and taking the difference value as a temperature deviation value; and temperature control information is analyzed and determined according to the temperature deviation value, and the temperature control information is output to heating jackets preset on all the sections of the L-shaped vacuum pipeline for temperature adjustment. The L-shaped vacuum pipeline has the effect that the L-shaped vacuum pipeline is not prone to being blocked.

An on-load tap-changer includes: a tap-changer body and a driving mechanism fixed on the tap-changer body. The tap-changer body includes a housing, multiple insulation fixing plates, multiple turntables, each of which includes a sheave and a cam plate, the cam plate of which is rotatably connected to the insulation fixing plate, and the sheave of which is connected to the driving mechanism, multiple vacuum tubes fixed on the multiple insulation fixing plates, and multiple transmission mechanisms, each of which includes a lifting lever and a reverse spring. When the driving mechanism drives the sheave to regulate voltage, the cam plate is synchronously driven to rotate, and then the vacuum tube is driven by the lifting lever and the reverse spring to achieve on / off arc extinction, thereby achieving on-load voltage regulation.

The invention discloses a non-interception type detector for measuring the beam position and the cross section of proton / heavy ion radiotherapy equipment, and belongs to the technical field of nuclear medicine and electronics crossing. Secondary particles (electrons or ions) obtained after ionization reaction of high-energy protons / heavy ions and residual gas molecules are used as signals, the signals are amplified to reconstruct the original position and cross section distribution of a beam, and the detector is a completely non-interception type detector and can be used as long-term online measurement equipment. According to the invention, the structure of the detector is systematically designed and optimized aiming at the position and section measurement of an extremely weak beam in proton / heavy ion radiotherapy equipment, a test is carried out on an experimental platform, a clear signal image can be obtained, the structure is compact, the performance is good, the work is stable and reliable, and the cost is low. The method is of great significance to debugging, operation and maintenance of proton / heavy ion radiotherapy equipment.

The invention relates to the technical field of transformer iron core production, in particular to iron core lamination equipment which comprises a pedestal, a rotating table is arranged in the center of the top of the pedestal, and a stacking tool is arranged at the top of the rotating table; the two material storage grooves are formed in the top of the pedestal respectively and correspond to the two opposite sides of the rotating table; the portal frame is fixedly arranged at the top of the pedestal, and the portal frame is provided with a horizontal lifting cross beam corresponding to the rotating table and above the two storage tanks; each reciprocating sliding block is arranged at the bottom of the lifting cross beam and horizontally reciprocates between the corresponding storage tank and the rotating table; and the multiple telescopic suction cups are distributed at the bottoms of the reciprocating sliding blocks, and the telescopic suction cups communicate with the vacuum pump through vacuum pipes and control valves. According to the equipment, manual position adjustment is not needed, and industrial accidents such as hand clamping of a steel plate are avoided, so that the production cost of the transformer iron core is reduced, and the product quality and the production efficiency are improved.

The invention discloses 95 aluminum oxide ceramic for a vacuum switch and a preparation method of the 95 aluminum oxide ceramic, and belongs to the technical field of aluminum oxide ceramic and vacuum switches. The ceramic disclosed by the invention is prepared from the following raw materials: 3 to 5 parts of nano alpha-aluminum oxide, 0.05 to 0.1 part of yttrium oxide, 0.04 to 0.08 part of lanthanum oxide, 0.3 to 0.6 part of zirconium silicate, 3.0 to 4.5 parts of fused quartz, 1 to 1.6 parts of magnesium fluoride, 0.3 to 0.5 part of calcium carbonate, 0.3 to 0.5 part of barium carbonate, 1.5 to 2.5 parts of Suzhou clay and 93 to 94 parts of micron alpha-aluminum oxide. The prepared high-performance 95 aluminum oxide ceramic has excellent breaking strength, electric breakdown strength, thermal shock resistance, chemical stability and the like, can meet the performance requirements of a high-pressure vacuum tube in a severe working environment, and ensures the working stability of a circuit.

The present invention provides an anthracite-based nitrogen-doped carbon material and a preparation method and application thereof. The following steps are included: a. The crushed and screened anthracite and graphite phase carbon nitride are mixed uniformly by mechanical ball milling in a mass ratio of (5-1): 1 to obtain a mixture; b. The mixture is placed in a vacuum tube furnace, heated to 400-700°C in an argon atmosphere, and pyrolysis pretreatment is performed to obtain a pretreated mixture; c. After the pretreated mixture is cooled to room temperature, it is heated to 1000-1400°C in an argon atmosphere, and high-temperature carbonization is performed to obtain anthracite-based nitrogen-doped carbon material. The carbon material prepared by the present invention has low cost, easy raw materials, strong conductivity, stable structure, and can effectively improve the electrochemical performance of sodium ion batteries. At the same time, the present invention also provides a sodium ion battery based on anthracite-based nitrogen-doped carbon material as a negative electrode material, which exhibits a higher reversible specific capacity and superior cycle performance and rate performance.

The invention discloses a microwave vacuum low-temperature liquid continuous belt dryer which comprises a concentration device, a main machine device, a material distributing device, a material collecting device, a packaging device, a vacuum device and a cold water device. Wherein the liquid product is primarily evaporated through the concentration device; the host device comprises a cavity and a plurality of belt conveying modules; a plurality of groups of first microwave generators are arranged on the cavity; the distributing device is connected with the concentrating device and the plurality of belt conveying modules respectively; the material collecting device is connected with the plurality of belt conveying modules; the packaging device is connected with the material collecting device; a vacuum port of the vacuum device is respectively communicated with the top and two sides of the cavity through a plurality of groups of vacuum pipes; a cooling water pipe of the cold water device is communicated with the first microwave generator; and the cold water device is used for cooling the first microwave generator and the microwave power supply. The invention further discloses a liquid product drying process. The device is high in automation degree, high in efficiency and capable of continuously running for a long time.

The present invention provides a low electromagnetic interference target chamber for laser plasma and its system, comprising: an outer vacuum target chamber, an inner metal target chamber and a radiation shielding channel; the inner metal target chamber is fixed inside the outer vacuum target chamber through an insulating support block, and the inner metal target chamber is at zero potential; the outer vacuum target chamber comprises: a first vacuum pipe arranged in the side wall, isolating the cable of the inner metal target chamber from the outer vacuum target chamber; the radiation shielding channel is arranged inside the inner metal target chamber, one end of the radiation shielding channel is sealed and connected to the inner metal target chamber; the other end extends toward the target material direction and communicates with the inner metal target chamber; the radiation shielding channel is a metal tubular structure with a cutoff frequency. The present invention sets an inner metal target chamber so that the electromagnetic interference generated by the laser plasma is blocked by the metal inner shielding layer, which greatly reduces the electromagnetic interference to the outer vacuum target chamber.

The invention relates to the technical field of pressure detection, in particular to a single crystal furnace vacuum pipeline pressure measuring method and device. The method comprises the following steps: quantifying temperature deviation of a vacuum pipeline in a crystal growth process; carrying out matching analysis on the temperature data and the growth trend of the growth rate, and carrying out time delay identification on the temperature data and the growth rate through a matching section group; dynamic compensation of temperature lag is analyzed according to the relation between temperature data in the crystal growth process and the time delay change of the growth rate and the deviation change of pressure, and a delay compensation index is determined; and performing temperature data compensation according to the delay compensation index and the temperature offset to obtain current adjustment pressure measurement data. The dynamic accompanying condition of the temperature and the crystal growth is analyzed, the time delay compensation is determined through the accompanying time delay degree, the temperature data is compensated in combination with the temperature deviation, and the pressure is adjusted, so that the measured pressure data can more truly reflect the pressure condition in the crystal growth process, and the pressure measurement precision is improved.

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 discloses a vacuum exhaust throttle valve setting method and system. The method comprises the steps that the current pressure value in a vacuum pipeline is obtained; calculating a pressure deviation and a pressure deviation change rate according to a preset target pressure value and the collected current pressure value; fuzzifying the calculated pressure deviation and the pressure deviation change rate to obtain a corresponding fuzzy linguistic variable; performing fuzzy reasoning based on a preset fuzzy rule base to obtain a valve opening adjustment amount in a fuzzy form; performing defuzzification processing on the valve opening adjustment amount in the fuzzy form to obtain an accurate valve opening adjustment amount value; and the opening degree of the exhaust throttle valve is adjusted according to the accurate valve opening degree adjustment amount value. The opening degree of the exhaust throttle valve is dynamically adjusted, and rapid and accurate control is achieved.

The invention relates to a method for detecting a marine corrosion primary process, which comprises the following steps of: constructing three vacuum chambers and connecting the three vacuum chambers by using vacuum pipelines to form a detection system; ultrafast femtosecond laser with the repetition frequency being 1 kHz, the single pulse energy being 6 mJ, the pulse width being 35 fs and the central wavelength being 800 nm is generated through a pulse amplifier; one beam of 2mJ enters a vacuum chamber pipeline to be transmitted as a pulse light beam for detection in the original process of ocean corrosion, the other beam of 4mJ is transmitted outside the vacuum chamber to be used as a pump pulse light beam, and 400 nm pump pulse laser is generated through frequency doubling of a BBO crystal; the pump light beam and the detection light beam are incident on a sample of a sample mechanism in the third vacuum chamber, then the pump light beam is blocked, and only the detection light beam is incident on the sample; xUV light beams reflected from the sample are subjected to spectral dispersion and then enter a CCD detector, and the dynamic response of the sample after being excited by the pump light is monitored by measuring the transmissivity, reflectivity or absorption change of the surface of the sample.

The invention discloses a hydrogen storage cylinder water pressure testing device and method, the device comprises a clamping assembly and a water injection and evacuation assembly, the clamping assembly comprises a clamping mechanism and a swing driving mechanism, and the swing driving mechanism is used for driving the clamping mechanism to swing so as to control the hydrogen storage cylinder clamped on the clamping mechanism to swing up and down; the water injection emptying assembly comprises a testing tool mechanism and a water injection pressurizing mechanism, the testing tool mechanism comprises a tool body, a vacuum pipe and a water injection pipe, the tool body is arranged in the bottle nozzle in a sleeved mode, and the vacuum pipe is provided with a gas inlet end extending into the hydrogen storage bottle and an exhaust end communicated with the outside; the water injection pipe is provided with a water outlet end communicated with the interior of the hydrogen storage cylinder and a water inlet end connected with the water injection pressurization mechanism, and the air inlet end is provided with a floating piece. The liquid level in the hydrogen storage cylinder swings relative to the hydrogen storage cylinder, so that the gas inlet end of the vacuum tube is driven to different areas in the hydrogen storage cylinder, gas is discharged outwards, it is guaranteed that the hydrogen storage cylinder is filled with liquid, formation of a gas cavity is avoided, and the testing accuracy is improved.

A geophysical or space-based detection, interrogation, or exploration system includes a compact electric dipole driven transmitter for producing a primary electromagnetic field, and a very sensitive electromagnetic sensing receiver for detecting a secondary electromagnetic field produced by electromagnetic induction in a target responsive to the primary electromagnetic. The electromagnetic sensing receiver is configured to employ computer-controlled software that operates an inverse algorithm that processes receiver data resulting from detection by the electromagnetic sensing receiver of the secondary electromagnetic field, and that performs analysis on results of the inverse algorithm to classify the target in a manner that distinguishes material, shape, or location of the target, and that displays results of the analysis. The compact electric dipole driven transmitter can be a compact transmitting antenna according to the present invention that includes a vacuum tube, a charged particle beam gun, a beam timing controller, and a beam speed controller.

The invention discloses a single-drive shearing and shaping device for vacuum pipe fitting heat sealing, comprising: a housing, a driving device driving a first gear with an inner bore cam to rotate around a central axis; the axial cam part and the first gear synchronously rotate around the central axis; the shearing surfaces of the two groups of shearing parts are oppositely arranged in an inner hole of the first gear, and the two groups of shearing parts are driven by the inner hole cam to do periodic opening and closing movement in the radial direction of the first gear and driven by the axial cam part to do periodic reciprocating movement in the axial direction of the first gear. According to the invention, radial and axial multi-step actions of the shearing and shaping device can be realized only by adopting a single driving device, and automatic melting and sealing of the vacuum sealing connecting pipe can be completed by matching with heating and vacuumizing equipment, so that the production efficiency is effectively improved, the production cost is reduced, and the stability of the product quality is ensured.

The utility model relates to the technical field of electric vehicle charging equipment, and discloses an electric vehicle charging pile with a waterproof structure, which comprises a bottom plate, a charging pile body is fixedly mounted at the top of the bottom plate, a guide rod is fixedly mounted on the front surface of the charging pile body, and a rainproof cover is slidably mounted on the inner side of the guide rod. And a limiting block is fixedly installed outside the rainproof cover, the guide rod and the limiting block are installed in a sliding mode, a heat dissipation grid is arranged on the front face of the charging pile body, a dust collection mechanism is arranged in the rainproof cover, and a cleaning mechanism is arranged in the rainproof cover. According to the charging pile, the dust collector is started, under the cooperation of the dust collection pipe and the dust collection head, dust on the surface of the heat dissipation grid is conveniently cleaned, meanwhile, heat is conveniently sucked, and therefore the heat dissipation efficiency of the charging pile body in rainy days is improved, and through the arranged filter screen, dust is conveniently isolated, and meanwhile hot air is conveniently discharged.

According to one embodiment of the present disclosure, a vacuum circuit breaker may include: a pressure vessel filled with an insulating gas of a predetermined pressure; a vacuum interrupter provided inside the pressure vessel and having a fixed electrode and a movable electrode in a vacuum tube in a vacuum state; a bellows provided to seal a gap between the vacuum tube and the movable electrode; a movable rod, one end of which is connected to an end portion of the movable electrode via an insulating link, and which is capable of penetrating the pressure vessel and reciprocating in an axial direction while maintaining airtightness; a drive rod which is provided outside the pressure vessel at the other end of the movable rod and which transmits the driving force of the drive unit to the movable rod; and a contact pressure spring, one end of which is supported by the movable rod and the other end of which is supported by the driving rod, in which a ratio of a self-closing force of the vacuum interrupter to a minimum closed contact pressure is set to a predetermined ratio.