59 results about "Low vacuum" patented technology

This utility model discloses a vacuum pump with vibration reduction and noise reduction functions, including a vacuum pump body, and a vibration damping base installed at the bottom of the vacuum pump body. The vibration damping base can reduce the vibration of the vacuum pump body during operation, thereby reducing the noise generated by the vibration of the vacuum pump body. A noise reduction shell is installed on the outside of the vacuum pump body, which can reduce the noise generated by the vacuum pump body during operation. An air filter device is installed at the air inlet of the vacuum pump body, which can filter the air entering the vacuum pump body. The air filter device consists of a filter device shell and a metal filter plate. The metal filter plate is inserted into the interior of the filter device shell through a filter plate insertion slot on the filter device shell. This structure makes the metal filter plate easy to disassemble and assemble, thereby facilitating quick cleaning of the metal filter plate.

This invention discloses a low-vacuum laser welding device for medium-thick aluminum alloy plates, belonging to the field of metal welding technology, aiming to solve the problems of prominent porosity defects and insufficient mechanical properties in the welding of medium-thick aluminum alloy plates. The device consists of a laser cleaning and oscillating welding integrated module, a low-vacuum welding chamber module, a control system, and a detection module. The laser cleaning module uses a pulsed fiber laser to remove the oxide layer at an optimal energy density of 13.24 J / cm² under nitrogen protection, reducing the surface oxygen content to 9.66%. The low-vacuum welding chamber module constructs a negative pressure environment of 10²-10³ Pa to suppress plasma plumes. The oscillating laser welding module optimizes the stirring of the molten pool by achieving circular oscillation with a frequency of 80 Hz and an amplitude of 1 mm. The control system coordinates and regulates the parameters of each module, and the detection module monitors the weld quality in real time. This device reduces the weld porosity to below 0.032% and the tensile strength to 388.62 MPa (83.16% of the base material), making it suitable for welding medium-thick aluminum alloy plates for aerospace applications.

This invention belongs to the field of egg product preparation technology, specifically relating to a pre-prepared salted duck egg, salted duck eggs, and a rapid pickling method. The rapid pickling method for salted duck eggs includes: (1) pre-treating duck eggs by immersing them in an organic acid solution; (2) immersing the pre-treated duck eggs in a pickling solution and pickling them using a vacuum pulsation method to obtain the pre-prepared salted duck egg; wherein, the vacuum pulsation method is: the vacuum degree of the pickling system is periodically alternating between high vacuum degree and low vacuum degree, the high vacuum degree is not higher than -0.08MPa, and the low vacuum degree is not lower than -0.05MPa. This invention, through vacuum pulsation technology combined with organic acid pre-treatment, achieves an oil yield of 66.5% in salted duck egg yolks and a salt content of 7.8% in egg whites within 20 days, and enriches DHA to 1434.2mg / kg and EPA to 78.0mg / kg, realizing a synergistic effect of shortening the pickling cycle and improving product quality.

The application discloses a method for realizing TGV high-conductivity copper-clad by using a magnetic filtering vacuum arc metal film, and specifically comprises the following steps: S1, ultrasonic cleaning is performed on a glass through-hole substrate; S2, sub-etching cleaning treatment and activation of a substrate surface are performed on the glass through-hole substrate under a vacuum environment; S3, a Ti film layer is deposited on the glass through-hole substrate after the treatment in S2 by using a magnetic filtering vacuum cathode arc method; and S4, a Cu film layer is deposited on the Ti film layer under a low vacuum environment. By using the method provided by the application, a Ti undercoat layer is first deposited, the problem of poor adhesion between Cu and a glass substrate is solved, then copper-clad deposition is performed, in addition, the glass substrate can be conductive after Ti plating, so that the bias voltage can be increased, the energy of Cu ions entering the hole is larger, the thickness of the film plated on the hole wall is improved, the adhesion is stronger, and the conductivity is improved.

This disclosure provides a vacuum filtration structure and a vacuum die-casting machine. The vacuum filtration structure includes a vacuum valve, a vacuum valve connector, and a filter assembly connected in series. One end of the vacuum valve connector is fixed to the exhaust port of the vacuum die-casting machine and communicates with the exhaust port. The vacuum valve is installed at the other end of the vacuum valve connector. The filter assembly is installed and fixed between the vacuum valve and the vacuum valve connector. The filter assembly includes an aluminum melt barrier, which blocks the aluminum melt. The aluminum melt barrier has a plurality of first filter holes, each with a pore size of 30μm-100μm. This vacuum filtration structure not only reduces the maintenance cost of the vacuum die-casting machine but also improves its production efficiency.

The utility model relates to a kind of vacuum drying device and flexible perovskite battery roll-to-roll manufacturing equipment, vacuum drying device includes upper vacuum cavity, lower vacuum cavity, negative pressure support mechanism and several guide vanes, upper vacuum cavity and lower vacuum cavity are opposite and form the narrow slit passage for flexible substrate to pass through in middle, negative pressure support mechanism is located in lower vacuum cavity and its support surface is with narrow slit passage equal height, several guide vanes with angle can be adjusted in 0 °-45 ° range are equipped in upper vacuum cavity. Device is through guide vane and is optimized by air flow and makes flexible substrate stable by negative pressure support mechanism, realize the high-quality continuous preparation of perovskite layer. Equipment includes the roll-off device, slit coating device, vacuum drying device, high-temperature annealing device and winding device arranged in sequence. Equipment integrates slit coating, vacuum drying and high-temperature annealing function, especially suitable for efficient, low-cost, large-scale industrial production flexible perovskite thin-film battery.

This invention discloses a vacuum-assisted homogenization and temperature-controlled 3D printing method and apparatus for irregularly shaped viscoelastic propellants, belonging to the field of additive manufacturing technology for energetic materials. The vacuum-assisted homogenization and temperature-controlled 3D printing method for irregularly shaped viscoelastic propellants achieves online degassing and precise temperature control of the slurry in a closed vacuum environment through synergistic physical field control. The technical solution of this application has the following technical effects: it abandons the inert gas protection method that may introduce new gas sources, and adopts a synergistic physical degassing mechanism based on low vacuum negative pressure, supplemented by ultrasonic vibration and pulsed vacuum fluctuations. The stable negative pressure environment provides a continuous driving force for the escape of gas inside the slurry; ultrasonic vibration acts on the slurry, which can destroy the adhesion state of microbubbles and promote their aggregation; pulsed vacuum fluctuations cause the bubbles to be in a periodic expansion and contraction state, thereby accelerating their instability and rupture. The above three physical fields cooperate and work synergistically.

The utility model discloses a three -section type conical screw rotor, three -section type conical screw rotor is divided into suction section, compression section and exhaust section in proper order along screw axial direction, the suction section is equal cross section and equal pitch along screw axial direction, the compression section adopts and is variable cross section and variable pitch along screw axial direction, the exhaust section is equal cross section and equal pitch along screw axial direction, the cross section width of suction section along screw axial direction is greater than the cross section width of exhaust section along screw axial direction, the end face profile equation of each section is same, and all are by five curves of abutting together closed, and the five curves include involute section AB, addendum circle arc section BC, long amplitude outside cycloid section CD, dedendum circle arc section DE and point conjugate curve section EA. The utility model also provides a vacuum pump. The device of the utility model can effectively reduce the noise of vacuum pump, reduce the clearance backflow, thereby improve its reliable stability and practical life.

This invention discloses a low-selectivity vacuum dehumidification membrane and its preparation and testing methods. The low-selectivity vacuum dehumidification membrane of this invention has a four-layer structure, including a support layer, a hydrophobic layer, a hydrophilic layer, and an active layer. The hydrophobic layer is placed on the support layer, the hydrophilic layer is adhered to the hydrophobic layer, and the active layer is uniformly coated on the hydrophilic layer. The performance of the low-selectivity vacuum dehumidification membrane can be tested using the testing method proposed in this invention. The low-selectivity vacuum dehumidification membrane of this invention enables vacuum membrane dehumidification systems to operate under the drive of a low-power vacuum pump, which is expected to reduce the noise of the vacuum membrane dehumidification system and improve the system energy efficiency. The testing method of this invention solves the problem of difficulty in measuring the water vapor partial pressure on the permeate side, making the testing process simple and feasible.

This utility model provides a filtration device for a laminator, relating to the field of laminator filtration technology. It aims to solve the problems of poor filtration efficiency in existing vacuum pumps that use conventional paper filter elements to filter the gas generated during vacuuming. This allows impurities such as welding slag and iron filings to penetrate the filter element and enter the vacuum pump cavity, affecting normal operation. Furthermore, the accumulation of impurities and dust necessitates frequent inspection, maintenance, and upkeep of the vacuum pump and filter, increasing maintenance costs. The proposed device includes a vacuum pump system with a laminator vacuum valve installed on its left side. A filter tank system is installed between the vacuum pump system and the laminator vacuum valve. The tank serves as a pre-vacuum tank to pre-vacuum the cavity. A bypass design is used; after pre-vacuuming, the filter tank's function is disabled, and the pump directly evacuates the cavity, reducing pump load, effectively improving equipment evacuation efficiency, reducing vacuum pump filter consumption, and minimizing pump maintenance.

An ejector device configured to reduce pressure at a vacuum pump outlet by introducing a gas stream into a process gas outlet stream between the vacuum pump outlet and a gas treatment system for treating the process gas, wherein the ejector device comprises: an inlet section with an inlet for coupling to the vacuum pump outlet; an outlet for coupling to a line providing a fluid connection path to the gas treatment system; a reduced-diameter neck section for accelerating a gas stream from the inlet to the outlet; and a gas stream injector for introducing an injection gas stream into the reduced-diameter neck section.

The utility model discloses a cavity structure of positive and negative pressure switching, including cavity main part, vacuum ball valve module, first pipe line, second pipe line and the confluence seat, this cavity structure still includes the vacuum metering subassembly, the electric control pressure control subassembly, the positive pressure ball valve subassembly and the pressure relief valve subassembly all with the connection of confluence seat, vacuum ball valve module and the first mounting hole's junction is provided with the first sealing ring, the confluence seat is connected between first pipe line and second pipe line and is fixed to the cavity main part outside through the connecting plate side, and the internal chamber of confluence seat is communicated with the cavity main part, and vacuum metering subassembly is used for measuring the vacuum size of confluence seat inside, and the electric control pressure control subassembly is used for controlling the air pressure size of confluence seat inside. The utility model can realize big pressure difference and low vacuum work, accurate control pressure, quick response pressure switch, satisfy VR product display pasting to positive and negative pressure switching high efficiency, accurate demand, improve product quality and production efficiency.

This invention provides a quantum current combined measurement device and method based on high-precision vacuum pressure control. The device includes: a vacuum chamber; a vacuum pump connected to the vacuum chamber; a vacuum pressure control component connected to the vacuum chamber; a high-current measurement component disposed within the high-current chamber; and a low-current measurement component disposed within the vacuum chamber. This invention regulates the vacuum level within the vacuum chamber through the vacuum pressure control component. When measuring extremely weak currents in a single electron stage, the vacuum level is reduced, and the signal is guided and collected by the low-current measurement component, enabling signal ion multiplication detection. When the current increases to the nanoampere level or above, the vacuum level is increased, switching to the high-current measurement component for direct charge collection measurement. This quantum current combined measurement device uses vacuum level as a key control variable, integrating the high sensitivity of the low-current measurement component to weak signals with the high-precision measurement capability of the high-current measurement component to strong signals into a single system.

The utility model provides a kind of rotary table type glue injection, vacuum pressing equipment belongs to automatic production equipment technical field, for solving the technical problem that glue liquid inside is easy to produce bubble and cavity when glue injection sealing of automobile suspension assembly, the equipment includes support turntable, lower pressing vacuum pressing device, automatic glue injection device, auxiliary part placing seat and auxiliary part transfer device, support turntable sets up multiple workpiece placing tool, tool includes lower vacuum pressing shell and workpiece mounting seat;Vacuum pressing device forms sealed space by upper and lower vacuum pressing shell, realizes bubble-free pressing in cooperation with vacuum extraction interface and pressing driving device, accurate glue injection is completed by glue injection pipeline and driving device of automatic glue injection device, effectively eliminates glue liquid cavity problem, improves product assembly quality and operation efficiency.

This application discloses a sample carrier device and a scanning electron microscope (SEM), relating to the field of SEM technology. The device includes a first cavity containing a sample carrier assembly movable in three axes; a second cavity, the top of which is sealed and isolated from the first cavity by a non-magnetic partition, the interior of which includes a drive assembly that magnetically couples the sample carrier assembly to move in three axes; a pre-pump and a post-pump, the pre-pump maintaining a low vacuum environment inside the second cavity and the post-pump maintaining a high vacuum environment inside the first cavity. This application can improve the sealing performance of the vacuum cavity containing the sample, reduce the space occupied by the vacuum cavity, and enhance the temperature and pressure stability of the high vacuum environment within the vacuum cavity, thereby improving the observation stability and accuracy of the sample by the SEM.

An ejector device 100 for reducing a pressure at a vacuum pump exhaust 110 by introducing a flow of gas into a process gas exhaust flow between the vacuum pump and a process gas treatment system. The

This invention discloses a method for preparing ultra-high strength 40CrMnSi i2Ni i2MoVA ultra-large-sized forging billets, achieving comprehensive metallurgical quality that fully meets the technical specifications for small-sized round bars. Vacuum induction smelting precisely controls the carbon, manganese, sulfur, and titanium content in the steel, reducing the generation and accumulation of inclusions; refining employs low-vacuum stirring to continuously improve the purity of the molten steel; during casting, low-temperature, low-segregation protective casting technology is used to achieve uniform chemical composition in the ultra-large-sized electrode billets; it enables two materials from one ingot, improving the ingot utilization rate; and a high-expansion-low-low-low control technology is used for the ingot to obtain a uniform fine-grained structure. The beneficial effects of this invention are: solving the problems of low-magnification microstructure uniformity, chemical composition, and inclusion segregation in large-sized ingot forging billets; achieving excellent metallurgical quality in all directions (longitudinal, transverse, and high-axis), fully meeting the technical specifications for small-sized bars, while significantly increasing the service life of the forging billets.

This allows for the selection of materials that can be regenerated under low vacuum conditions while maintaining their performance. [Solution] A method for evaluating a carbon dioxide adsorbent, comprising: (a) supplying a gas containing water vapor to the carbon dioxide adsorbent and allowing water to be adsorbed onto the carbon dioxide adsorbent for a predetermined time from the start of supply; (b) supplying an inert gas to the carbon dioxide adsorbent; and (c) raising the temperature of the carbon dioxide adsorbent and measuring the water desorbed from the carbon dioxide adsorbent, wherein the evaluation method evaluates whether the desorption peak temperature, which is the temperature at which the detection signal corresponding to the water desorbed from the carbon dioxide adsorbent is maximized, is 130°C or less in step (c).

The application provides a low-vacuum pipeline magnetic suspension system superconducting linear motor stator module heat dissipation method, which comprises the following steps: monitoring the temperature rise of the stator winding, lifting the vacuum degree in the vacuum pipeline to a certain extent when the temperature rise of the winding exceeds the early warning temperature, closing the re-pressurizing valve when the air pressure reaches the preset value, spraying the cooling water of the preset temperature on the surface of the stator module and the bottom series cable by the pipeline spraying system, restoring the air pressure in the vacuum pipeline to the normal low-vacuum state after the spraying is completed, ensuring that the cooling water can completely boil and phase change to absorb heat, monitoring the temperature drop amplitude of the stator module in single heat dissipation, and repeating the above cycle if the stator winding in the whole heat dissipation interval is not completely reduced to the preset temperature after single heat dissipation. The technical scheme of the application solves the technical problems of high cost, many joints, low reliability, large eddy current, high magnetic resistance and inability to directly dissipate heat for the cable caused by the continuous laying of the water-cooled plate in the prior art.

A method for preventing blockage of a vacuum distillation channel during production of titanium sponge in an inverted U-shaped furnace, comprising an electric distillation furnace heating step, a low vacuum distillation step, and a high vacuum distillation step. In the electric distillation furnace heating step, the temperatures of zones 1 and 2 of an electric distillation furnace are controlled to be 950°C-980°C, the temperatures of zones 3 and 4 of the electric distillation furnace are controlled to be 900°C-980°C, and the temperatures of zones 5 and 6 of the electric distillation furnace are controlled to be 920°C-980°C. The method of the present invention can prevent condensation of evaporated Mg and MgCl2 gases at a condenser channel, ensuring the quality of titanium sponge.

The present invention is related to an opaque insulating low vacuum glazing laminate, comprising at least one inner glass sheet, at least one outer glass sheet, and at least one insulating structure arranged between the inner and outer glass sheets. The insulating structure comprises at least one enveloped aerogel vacuum layer, wherein the aerogel layer is enveloped in at least one metal-based foil. The invention is also related to a method for forming an insulating structure for use in an insulating glazing laminate and a method of forming an insulating glazing laminate.

This invention discloses a method and system for detecting air leakage in a low-vacuum baking chamber of a battery based on high-frequency oscillation feature recognition of gas pressure, relating to the field of lithium-ion battery manufacturing technology. The method includes: acquiring gas pressure waveform data within the baking chamber during the low-vacuum baking stage and preprocessing the gas pressure waveform data; extracting time-series features from the preprocessed gas pressure waveform data, including oscillation frequency per unit time, average rise time, root mean square deviation of rise time, and maximum fluctuation amplitude; determining leakage based on the time-series features, and if leakage occurs, issuing an alarm and recording the corresponding time-series features and their corresponding gas pressure waveform data within the specified unit time. This invention comprehensively depicts the dynamic law of gas pressure during leakage by real-time acquisition and preprocessing of gas pressure waveform data within the baking chamber, followed by time-series feature extraction of the acquisition results. Based on the extracted time-series features, multi-dimensional leakage determination is performed, enabling accurate and real-time leakage detection.

A vacuum pump and a method for controlling such a pump to reduce the power consumption of the pump during standby mode. The method includes operating the pump by driving the pumping mechanism at a nominal speed, deciding to put the pump into standby mode with the exhaust check valve closed, boosting the speed of the pumping mechanism for a predetermined time to reduce the amount of gas in the pump, and reducing the speed of the pumping mechanism to operate the pump in standby mode with the exhaust check valve closed.

The present application relates to the technical field of bonding processing. A deformation type pressurized bonding device comprises an upper cover and a lower cavity arranged in a top-bottom manner, and the upper cover and the lower cavity enclose a processing cavity; the lower side of the upper cover is connected with an elastic expansion film, which is used as a lower pressing member for pressing a workpiece; the elastic expansion film divides the processing cavity into an upper vacuum chamber and a lower vacuum chamber arranged in a top-bottom manner; the upper cover is connected with a first gas path pipeline in communication with the upper vacuum chamber; the lower cavity is connected with a second gas path pipeline in communication with the lower vacuum chamber; the lower side of the lower cavity is connected with a longitudinal telescopic bellows, the bellows is in communication with the inner cavity of the lower vacuum chamber, and the bottom of the bellows is connected with a counterweight. The present application realizes pressurizing action through the deformation of the elastic chamber and the downward movement. Through the counterweight, the structure of the downward pulling bellows under the action of gravity offsets the vacuum degree change caused by the leakage of the sealed cavity. Therefore, the vacuum pump does not need to work all the time.

The utility model discloses a high-voltage vacuum circuit breaker convenient to install, which comprises a base, a vacuum circuit breaker is fixedly connected to the top of the base, an intelligent control device is fixedly connected to the outer side of the base, an installation frame is fixedly connected to the bottom of the base, and a moving assembly is arranged in the installation frame. The moving assembly comprises two first rotating rods rotationally connected to the interior of the mounting frame. A motor drives a first reciprocating screw to rotate forwards, so that a transmission block is driven to ascend and descend, a third rotating rod is driven to move, a storage block is driven to move, a connecting block rotates along a second rotating rod, a mounting block is driven to rotate along a first rotating rod, and universal wheels move; and the vacuum circuit breaker can be assisted to move through the universal wheels, so that the vacuum circuit breaker can be conveniently installed in a room, and the carrying difficulty of the vacuum circuit breaker is further reduced.

This application belongs to the technical field of nanoimprint lithography and discloses a vacuum chuck and dynamic adjustment system. The vacuum chuck includes a chuck substrate and a driving assembly. The chuck substrate has a negative pressure cavity, a working surface located at the top of the negative pressure cavity, an adsorption port located on the working surface and communicating with the negative pressure cavity, and a through port located on the working surface and communicating with the negative pressure cavity. Multiple through ports are spaced apart. The negative pressure cavity can generate negative pressure under the action of a negative pressure device. The working surface is used to place a substrate. The driving assembly includes multiple driving components located in the negative pressure cavity. Each driving component has a driving part that can move in a direction perpendicular to the working surface. Each driving part can extend to the top of the working surface through its corresponding through port to push the substrate placed on the working surface, thereby reducing the flatness requirements of the working surface and reducing the investment cost of production equipment, thus achieving the effect of reducing the manufacturing cost of the vacuum chuck.

An ejector device (100) configured to reduce pressure at a vacuum pump exhaust (110) by introducing a gas flow into a process gas exhaust flow between the vacuum pump exhaust and a gas treatment system for treating the process gas is disclosed. The ejector device comprises: an inlet portion including an inlet for coupling to the vacuum pump exhaust; an outlet for coupling to a conduit providing a fluid communication path to the gas treatment system; a reduced-diameter throttling portion for accelerating a gas flow from the inlet to the outlet; and a gas flow injector for introducing an injection gas flow into the reduced-diameter throttling section. Abstract figure: Figure 3

This invention discloses a method for high-quality, clean electroslag ingot smelting in an oxygen-free, low-vacuum environment. It employs a multi-functional protective atmosphere vacuum pressurized electroslag furnace with upper and lower furnace chambers and a dedicated meshing device for sealing. This furnace offers excellent sealing and rapid evacuation, allowing the entire crystallizer to be placed in the lower chamber. The low vacuum prevents slag from being sucked up, ensuring a smooth electroslag remelting process, minimizing slag boiling, stabilizing the molten steel, and resulting in high-quality electroslag ingots. An oxygen detector is used to monitor the oxygen content within the furnace. Vacuuming is initiated when the oxygen content reaches 0 ppm to ensure an oxygen-free environment. Smelting at a vacuum level of 3000–5000 Pa ensures that the molten slag does not detach from the molten steel surface due to evacuation force, while also guaranteeing electroslag remelting under low vacuum conditions. Using refined slag as the furnace slag significantly reduces the formation of inclusions in the electroslag ingots and allows for the smelting of various high-quality, clean, special electroslag steels. Hydrogen diffusion annealing is used to remove hydrogen, ensuring that the hydrogen content in the electroslag ingot is ≤1.0 ppm.