397 results about "Low vacuum" patented technology

The invention discloses a low-vacuum circulating water heating dynamic load matching method based on AI regulation and control, and the method comprises the following steps: step S100, multi-source data real-time collection: building thermal environment parameters are synchronously collected through a temperature sensor array, a vacuum pressure transmitter, a flowmeter and an environment monitoring unit which are deployed in a distributed manner; according to the method, the control period is compressed to the minute level, compared with traditional PID control, the response speed is increased by several times, the indoor temperature can be controlled more accurately, and meanwhile the failure rate of equipment is reduced. According to the sudden weather coping mechanism, heat supply strengthening can be started 30 minutes ahead of time under extreme weather such as snowstorm weather, and the stability of the system is ensured. The method is characterized in that the prediction advantage of deep learning and the optimization capability of model prediction control are deeply combined, and the control problem of multivariable strong coupling of the low vacuum system is solved through a verification system of multi-source data fusion and virtual-real combination.

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.

A method of making a golf club head includes interposing bonding tape between a first piece and a second piece of the golf club head such that the first piece is temporarily adhered to the second piece via a tackiness of the bonding tape. The method additionally includes positioning the first piece, the second piece, and the bonding tape, interposed between the first piece and the second piece, in a vacuum bag, and reducing a pressure within the vacuum bag, relative to a pressure external to the vacuum bag, such that the vacuum bag collapses onto the first piece and the second piece and compresses the bonding tape between the first piece and the second piece. The method also includes heating the bonding tape, at least to a curing temperature of the bonding tape, when the pressure within the vacuum bag is reduced.

The invention provides additive manufacturing equipment and method for a magnesium alloy liquid continuous injection molding annular part, and mainly relates to the field of metal material additive manufacturing equipment. The invention discloses additive manufacturing equipment and method for a magnesium alloy liquid continuous injection molding annular part, and the additive manufacturing equipment comprises a crucible smelting assembly arranged in an upper vacuum cavity, a liquid injection printing assembly which is arranged in a lower vacuum cavity and communicates with the crucible smelting assembly, and a controller. A three-dimensional motion platform located below the liquid jet printing assembly is arranged in the lower vacuum cavity, and an annular mold with an opening in the top face is arranged at the top of the three-dimensional motion platform. The device has the beneficial effects that the hollow graphite ring piece and the nozzles distributed in an annular array mode are adopted, uniform spraying of magnesium liquid to the annular mold is achieved, the forming efficiency and the quality stability are improved, and the device is particularly suitable for manufacturing large-diameter annular pieces.

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 discloses an energy-saving type vacuum cabinet and a using method thereof, and relates to the technical field of vacuum, the energy-saving type vacuum cabinet comprises a mounting cabinet body, a first partition plate is fixedly mounted in the mounting cabinet body, a second partition plate is fixedly connected in the mounting cabinet body, a sealing plate is mounted on the front surface of the mounting cabinet body, and the sealing plate is used for sealing a vacuum chamber a and a vacuum chamber b respectively; the vacuum pump set is installed at the bottom of an inner cavity of the installation cabinet body, the communicating pipe set is arranged among the vacuum pump set, the vacuum cavity a and the vacuum cavity b, and the vacuum cavity a and the vacuum cavity b form a negative pressure auxiliary source through the communicating pipe set. According to the invention, by utilizing the cooperative use mode of the mounting cabinet body, the vacuum pump set and the connecting pipe set, when the vacuum pump set performs vacuum negative pressure operation on the vacuum chamber a or the vacuum chamber b, the vacuum chamber a and the vacuum chamber b can be a negative pressure auxiliary source under the action of the connecting pipe set, so that the energy consumption during the operation of the vacuum pump set is reduced, and the energy consumption is further reduced.

The utility model discloses an electrostatic vacuum plate structure and a filling type electrostatic vacuum plate, and relates to the field of vacuum plates, the electrostatic vacuum plate structure comprises an upper vacuum plate and a lower vacuum plate, the space between the two vacuum plates is in a vacuumized state to form a vacuum cavity, and the two ends of the vacuum cavity are subjected to heat edge sealing treatment; the upper vacuum plate, the lower vacuum plate and the sealing edges at the two ends are attached through flexible insulating aluminum plastic films containing PTFE layers; inner-layer aluminum foils are pasted on the upper vacuum plate and the lower vacuum plate in the vacuum cavity respectively, the two inner-layer aluminum foils sense same-polarity negative static electricity, external air pressure is resisted through electrostatic repulsive force, and the thickness of the vacuum cavity is maintained to be in the preset size. Compared with a traditional glass fiber vacuum plate, heat transfer of an inner core material is avoided, the heat conductivity is reduced, the thickness of the vacuum plate can be reduced to be within 0.5 mm, high-performance heat-insulation ultrathin performance is achieved, a hard plate is changed into a flexible film material, and the fitting adaptability of a product on different surfaces is greatly improved.

The invention discloses a plasma-assisted surface activation method. The method comprises the following steps: placing a material matrix in a reaction cavity, vacuumizing, introducing oxygen and inert gas, exciting a radio frequency power supply and a microwave power supply to form multi-frequency composite plasma, and treating the material. The physical bombardment of the radio frequency plasma and the chemical activation of the microwave plasma have a synergistic effect, and deep cleaning and efficient modification of the surface of the material are realized in a low-vacuum environment. The surface water contact angle of the treated material is reduced to 35 degrees or below, the adhesive force of a coating reaches 0-1 level, the tensile shear strength is improved to 22.5 MPa or above, the problems that a traditional surface treatment method is unstable in effect and insufficient in modification depth are effectively solved, and the surface treatment method has the outstanding advantages of being high in treatment efficiency, uniform and lasting in modification effect, environmentally friendly and the like.

The invention relates to a control method, device, equipment and medium for stepped cascade electric adjusting valves, and belongs to the technical field of centrifugal separation of isotopes. The method comprises the steps that a preset pressure value and an actual pressure value corresponding to each electric adjusting valve are obtained; determining a pressure deviation value based on the preset pressure value and the corresponding actual pressure value; determining a pressure deviation change rate of the pressure deviation value based on the pressure deviation value; the pressure deviation value and the pressure deviation change rate serve as input values to be input into a fuzzy controller, output values are obtained, and the output values comprise # imgabs0 # and # imgabs1 #; superposing the output value with a set value of a controller to obtain an adjustment parameter; and the opening degree of each electric adjusting valve is adjusted based on the adjusting parameters, so that when the actual pressure value of one unit changes, the fuzzy controller adjusts the opening degrees of the electric adjusting valves of the other units according to the adjusting parameters, and the medium pressure in the low-vacuum medium environment is controlled. The pressure control device has the effect of effectively controlling the medium pressure.

The invention discloses a vacuum type heating structure for a differential pressure coating machine, which belongs to the technical field of coating machines and comprises a lower vacuum cover, an upper vacuum cover mounted on the upper side of the lower vacuum cover, and a vertical displacement driving device for driving the upper vacuum cover to be matched with the lower vacuum cover, a lower opening corresponding to the upper opening is formed in the lower side of the upper vacuum cover, the upper vacuum cover and the lower vacuum cover are both square, a coating film is mounted at the lower opening, and the upper opening and the lower opening are completely consistent in size and shape and can be overlapped. A heating assembly is installed in the upper vacuum cover, a heating system is used for heating a coating film to soften the coating film, coating of materials is facilitated, the uniformity of a coating layer is guaranteed, and the upper vacuum cover and the lower vacuum cover are matched to form a forming cavity. The shape and the position of the radiation area can be adjusted so as to meet the heating requirements of diversified products, and meanwhile structural reliability and energy consumption optimization are considered.

The utility model belongs to the technical field of vacuum sealer products, and particularly discloses a vacuum sealer with characters, which comprises a base and an upper cover, the upper cover is movably hinged with one side of the base, a vacuum pump, a control circuit board and a power line are arranged on the base, and an upper vacuum cavity and a lower vacuum cavity are arranged at corresponding positions of fitting surfaces when the base and the upper cover are closed. Sealing rubber rings are arranged on the periphery of the upper vacuum cavity and the periphery of the lower vacuum cavity respectively, a sealing heating piece assembly is arranged on the front side of the base, a heat sealing strip is arranged at the corresponding position of the front side of the upper cover, a plurality of character belts and character belt driving devices are arranged in the upper cover / base, and an elastic character hot stamping device is arranged at the corresponding position in the base / upper cover. The vacuum sealing machine is simple in structure, convenient to use, light and miniaturized in appearance, capable of achieving hot stamping of various characters, clear in handwriting, high in heating efficiency, capable of synchronously completing sealing and hot stamping of the characters, capable of being disassembled without additional tools, convenient to clean and maintain, long in service life, good in stability and low in manufacturing cost.

The invention discloses a vacuum pump assembly, which belongs to the technical field of vacuum and comprises a vacuum pump and a rotary air nozzle rotatably connected to an air inlet of the vacuum pump, and an included angle is formed between the air inlet direction of the rotary air nozzle and the rotating axis of the rotary air nozzle; the vacuum pump further comprises a silencer, the silencer is fixedly installed at an air outlet of the vacuum pump, an exhaust pipe is further installed at the exhaust end of the silencer, and the exhaust pipe is provided with a one-way exhaust structure. The vacuum pump is further provided with a shock pad. According to the vacuum pump assembly, the rotary air nozzle capable of freely rotating is installed at the air inlet of the vacuum pump assembly, so that the initial air inlet direction of the vacuum pump assembly can be changed by rotating the rotary air nozzle, and a vacuum pipe can be conveniently arranged between the vacuum pump assembly and the vacuum booster. Through the arrangement of the silencer and the one-way exhaust structure, the operation noise of the vacuum pump assembly can be effectively reduced, and external pollutants can be effectively prevented from entering the vacuum pump assembly. Through the arrangement of the shock pad, the vibration of the vacuum pump assembly during operation can be effectively reduced, and the comfort of a vehicle is improved.

A kind of vacuum system for nanodose detector gas density precision control belongs to ionizing radiation nanodose measurement field.The present application includes vacuum pump group unit, vacuum degree detection unit, logic control unit.The present application is aimed at the requirement of nanodose detector to vacuum degree and gas concentration, and realizes that working air pressure is in 1Torr by the pump group in vacuum system and the cooperation of PLC logic control and data monitoring, and gas pressure control precision reaches 0.01Torr.The system can provide ionizing radiation gas and low vacuum environment for nanodose detector, ensure that nanodose detector measurement signal is accurate and stable.The ionization degree of nanodose detector depends on the vacuum degree in cavity, and the vacuum degree of cavity depends on the concentration of gas in sensitive volume.The present application has the advantages of high precision, high accuracy, high reliability and the like.Through the present application, the vacuum environment of nanodose detector can be constant and sensitive gas is single, which can support the accurate measurement of nanodose detector.

The utility model discloses a mica plate layering detection device, and relates to the technical field of mica plate detection, a detection mechanism comprises a lower vacuum platform fixed in an equipment main body and an upper vacuum platform connected in the equipment main body through a lifting mechanism, the top of the lower vacuum platform is provided with a first sucker, and the top of the upper vacuum platform is provided with a second sucker. A servo electric cylinder is arranged on the upper vacuum platform, a lifting mechanism is arranged at the bottom of the servo electric cylinder, a tension sensor is arranged between the upper vacuum platform and the lifting mechanism, and a second suction cup is arranged at the bottom of the upper vacuum platform. The device can provide stable 50-Newton tensile force to apply tensile force to a mica plate sample so as to observe and evaluate whether the mica plate is layered or stripped under the action of the tensile force, the automation degree is high, and the detection efficiency is improved.

The utility model discloses a vacuum energy-saving generator, and relates to the technical field of vacuum pumps. The device is installed at the air outlet end of the vacuum pump and comprises a one-way valve, a sleeve and a vacuum generator, the one-way valve is located in the sleeve and divides the sleeve into an air inlet end and an air outlet end, the air inlet end of the sleeve is communicated with the air outlet end of the vacuum pump, and the air inlet end of the vacuum generator is located outside the sleeve and used for introducing high-speed flowing air. The air outlet end of the vacuum generator penetrates into the cavity of the air inlet end of the sleeve, the one-way valve is provided with a first exhaust port, the air outlet direction of the air outlet end of the vacuum generator is aligned with the first exhaust port of the one-way valve, and high-speed flowing air is ejected out through the air outlet end of the vacuum generator and then is exhausted through the first exhaust port of the one-way valve. The exhaust pressure of the vacuum pump is reduced, and the energy-saving effect is achieved.

The invention relates to the technical field of magnetic levitation vehicle walking mechanisms, and discloses a frame type suspension framework suitable for low-vacuum pipeline superconducting electric magnetic levitation. The suspension framework comprises a framework main structure, a supporting wheel mounting seat, a guide wheel mounting seat, a vertical shock absorber mounting seat, a longitudinal shock absorber mounting seat, a transverse shock absorber mounting seat, a hoisting seat, a transverse backstop mounting seat, a safety steel cable mounting seat, an equipment mounting plate and an emergency supporting wheel mounting interface, the framework main structure comprises framework end beams, framework side beams and framework cross beams, the framework end beams, the framework side beams and the framework cross beams are respectively provided with a plurality of lightening holes, and the framework main structure is made of aluminum alloy.

The present invention provides a low-temperature, high-pressure immersion Raman probe, comprising a front mirror assembly, an optical fiber fixing assembly, an extended fixing assembly, a pressure-resistant outer shell, and a rear shell assembly. A window glass is provided at the front end of the pressure-resistant outer shell, the front mirror assembly, the optical fiber fixing assembly, and the extended fixing assembly are sequentially mounted within the pressure-resistant outer shell, and the rear shell assembly is mounted at the rear end of the pressure-resistant outer shell. The present invention utilizes a structural design in which the front mirror assembly, the optical fiber fixing assembly, and the extended fixing assembly are sequentially mounted within the pressure-resistant outer shell, thereby enabling the probe cavity to be subjected to low vacuum or low-boiling-point inert gas replacement treatment, thereby avoiding the problem of low-temperature condensation and adsorption of air, and enabling the optical system performance of the probe to remain consistent at any length. During detection, since the optical system of the probe is immersed in the liquid to be tested, the temperature stability is more stable than that of a probe with a rear optical system, and the data consistency is higher.

The utility model relates to the field of special metallurgy, and discloses a waste discharge port structure of a vacuum induction melting furnace, which is characterized in that a gas path gas inlet is connected with a waste gas exhaust port of the vacuum induction melting furnace, and a gas outlet is connected with a vacuum pump through a pipeline; the drawing and inserting type first-stage filter is a high-temperature-resistant filter and is inserted into the gas path on one side of the gas inlet of the gas path; the cooling assembly is arranged in an air path between the first filter and the second filter in the air flow direction. The drawing and inserting type secondary filter is inserted into the gas path on one side of the gas outlet of the gas path; and the turbulent flow piece is formed on the inner wall of the gas path and / or the outer wall of the cooling assembly and used for increasing the heat exchange area and prolonging the waste gas passing time of the vacuum induction melting furnace. The service life of the vacuum pump can be effectively prolonged, and the failure probability of the vacuum pump is reduced.

The present invention discloses a differential pressure coating machine for composite materials, belonging to the technical field of coating machines, which includes a frame, a sliding table installed on the frame, and a lower vacuum hood fixed to the sliding table. A mold assembly is installed at the inner bottom of the lower vacuum hood. The mold assembly is connected to a lifting device. An upper vacuum hood is installed above the lower vacuum hood. A heating system is installed in the upper vacuum hood. A forming cavity is formed by the cooperation between the upper vacuum hood and the lower vacuum hood. The forming cavity is connected to a differential pressure generating system. A workpiece positioning mechanism for fixing the workpiece to be coated is installed at the lower opening of the upper vacuum hood. The mold assembly includes a support plate. A support frame is formed in the middle of the support plate. A plurality of mold units are arrayed and installed in the support frame. The upper surfaces of the plurality of mold units cooperate to form a coating working surface for the workpiece. The bottom of the mold unit is connected to the support frame through a vibration cylinder. The device of the present invention can increase the coating strength of the material on the workpiece surface and improve the coating quality of the workpiece surface.

The invention discloses a product inner cavity pressurizing sealing method and a sealing structure, and the method comprises the following steps: S1, arranging a connecting boss on a shell of a product, welding one end of a guide pipe on the connecting boss, and enabling the guide pipe to be communicated with the product inner cavity; s2, the other end of the guide pipe is sequentially connected with a pressure controller and a pressure air source through an air path; s3, air in the inner cavity of the product is pumped out through the pressure controller, and then the pressure air source is controlled by the pressure controller to charge the inner cavity of the product with pressurized air until the inner cavity of the product reaches the required pressure; s4, the preset section of the guide pipe is subjected to extrusion forming to form a flat structure, and resistance spot welding is conducted at the position of the flat structure through a resistance welding machine till a welding sealing structure is formed; s5, the part, except for the resistance spot welding sealing part, of the guide pipe is cut off, and a cut opening is ground; according to the scheme, the applicable compensation pressure range is larger, and the control precision is higher; and meanwhile, stable pressurizing and sealing welding in a low-vacuum-section pressure range can be achieved through resistance spot welding.

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.

The utility model discloses a gate valve for vacuum equipment, which comprises a fixed frame, a gate valve, a gate valve and a gate valve, the fixed frame is mounted at an opening of a process cavity in a matching manner, a gate plate matched with the opening in a covering manner is arranged in the fixed frame, and the gate plate moves in the fixed frame; when the door plate is completely moved into the fixed frame, the door plate covers the opening relative to the opening; and when the door plate is moved out of the fixed frame, the door plate is opened relative to the opening. According to the vacuum equipment, the door plate moves along one side of the horizontal direction of the fixed frame, so that the door plate is closed or opened relative to the opening of the process cavity, the overall height of the vacuum equipment is reduced, and the requirement for the vertical height of a plant is lowered.

The invention discloses a vacuum system for a mass spectrometer. The vacuum system includes a first vacuum region, a second vacuum region, a vacuum interlock connected to the first vacuum region by a first valve and to the second vacuum region by a second valve, a first pump connected to the first vacuum region and the second vacuum region, a second pump connected to the second vacuum region, a pressure sensor configured to determine a pressure within the second vacuum region, and a controller configured to adjust a position of the second valve in response to the pressure within the second vacuum region. The vacuum interlock device is configured to receive a sample. The first pump is configured to reduce pressure within the first vacuum region and discharge air to the second vacuum region. The second pump is configured to reduce pressure within the vacuum interlock. The controller is configured to prevent pressure fluctuations in the second vacuum region.

The invention discloses a manufacturing process of a vacuum insulated panel with a low vacuum degree enhanced in a structure. The manufacturing process comprises the following steps: carrying out compression pretreatment on a core body; laying surface-coated fiber cloth on the upper surface and the lower surface of the core body subjected to compression pretreatment, and implanting web wires according to preset density through a web wire machine to form a plurality of reinforced web wires penetrating through the thickness direction of the core body; a barrier layer is arranged, covers the upper surface and the lower surface of the core body and is fixedly connected with the belly wire exposed out of the core body, so that a reinforcing structure for resisting compression and stretching in the direction perpendicular to the surface of the core body is formed in the core body; vacuumizing the core body with the barrier layer until the core body is in a low-vacuum state with absolute pressure of 1000 Pa to 10000 Pa, and performing airtight sealing to obtain the vacuum insulated panel; wherein the barrier layer is configured to be a structural layer capable of realizing airtight packaging. Therefore, the core body has the capability of actively resisting pressure before being packaged, the'bulge 'failure caused by the collapse of the core body structure is fundamentally avoided, and the durability of the product is improved by an order of magnitude.

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.

The application discloses a method for determining the condensation temperature of nitrogen under low vacuum pressure, in which, in one test, the total pressure at the inlet of a nozzle is kept unchanged through pressure control, the total temperature at the inlet of the nozzle is first adjusted to a higher total temperature through temperature control, and then the total temperature at the inlet of the nozzle is gradually reduced according to certain temperature intervals, the total pressure at the inlet of the nozzle, the total temperature at the inlet of the nozzle and the pitot pressure at the outlet of the nozzle are monitored in real time during the operation of the wind tunnel, and the condensation temperature of nitrogen under low vacuum pressure is determined through comprehensive analysis of the above data. The method can accurately determine the condensation temperature of nitrogen under low vacuum pressure, and makes up for the deficiencies of the theoretical formula and the traditional test acquisition method. The result can be used to reasonably determine the total temperature of a hypersonic low-density wind tunnel, which can not only reduce the design difficulty of the heater itself, but also reduce the overall energy supporting scale of the wind tunnel.

The invention relates to the technical field of low-vacuum aircrafts, and discloses a cabin suitable for a low-vacuum single-suspension-frame aircraft. Wherein the cabin body comprises a sealing cover, a sealing unit and an equipment mounting unit, the sealing cover is connected with the equipment mounting unit through the sealing unit, the sealing cover comprises a metal cover body, a transverse reinforcing unit and a longitudinal reinforcing unit, and the transverse reinforcing unit and the longitudinal reinforcing unit are arranged outside the metal cover body; a groove is formed in the connecting position of the metal cover body and the equipment mounting unit and used for arranging the sealing unit, the equipment mounting unit comprises a metal upper cover plate and a metal framework, the metal framework is of a net-shaped framework structure formed by welding metal cross beams and metal longitudinal beams, and the metal upper cover plate is arranged above the metal framework. Therefore, the cabin for the low-vacuum superconducting vehicle can be provided, the cabin is connected with the equipment mounting unit in a matched mode through the sealing cover, and the cabin has the equipment sealing function while bearing is achieved.

The utility model discloses a multi-station water-cooling die frame which comprises an upper die plate, an upper vacuum channel, a fixing column, an upper die sleeve, a lower die sleeve, a lower vacuum channel, a lower die plate, an oil removing suction cup and a multi-station die, the upper die sleeve is matched with the lower die sleeve, the upper vacuum channel is arranged on the upper die sleeve, the upper die sleeve is connected with the upper die plate through the fixing column, and the lower vacuum channel is arranged on the lower die sleeve. A lower vacuum channel is arranged below the lower die sleeve, and the lower die sleeve is connected with the lower die plate through a fixing column. A water inlet and a water outlet are formed in the side edge of the upper die sleeve and the side edge of the lower die sleeve respectively, a multi-station die is arranged in the lower die sleeve, and an oil removing suction cup is arranged on the multi-station die. Efficient cooling and high-quality forming are achieved through cold water circulation and a vacuum system, the multi-station design and the oil removal suction cup are combined, the production efficiency is remarkably improved, product pollution is prevented, the structure is reasonable, and the application range is wide.

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 invention relates to the technical field of ink-jet printing machines, in particular to an ink-jet printing machine for cheese packaging, which comprises a conveyor belt, a packaging bag, a shell and a spray pipe arranged on one side of the shell, and further comprises a storage tank arranged in the shell and used for storing ink, and a stirring plate arranged in the storage tank. The stirring plate rotates in a low-vacuum environment to generate strong centrifugal force, bubbles in the ink are forced to separate and float upwards, the problems of nozzle blockage, ink interruption, code spraying fuzziness and the like are greatly reduced, the separated bubbles are actively broken in combination with alcohol atomization spraying of the bubble eliminating part, the ink purity is further ensured, and the ink quality is improved by maintaining the stable low-pressure environment in the storage tank. The bubble generation tendency is reduced, bubble floating separation is accelerated, the bubble removing efficiency is improved, the operation convenience is ensured through the design of a material opening threaded sealing cover, meanwhile, air entering and ink volatilization are isolated, and the pressure and component stability in the tank are maintained.