135results about How to "Guaranteed vacuum" patented technology

The invention provides a vacuum devolatilization device which comprises a vertical container, the container is provided with an extraction opening and a material inlet, the upper part of the container is provided with a melt pressure chamber, and the melt pressure chamber is communicated with the material inlet; the devolatilization device is provided with at least one falling film pipe, the inner wall surface of the falling film pipe is a material falling film flowing contact surface, a vacuum chamber is arranged above the melt pressure chamber in the container, and the extraction opening is formed in the vacuum chamber; and a gas phase channel pipe is arranged at the upper end of the falling film pipe, penetrates through the melt pressure chamber and is communicated with the vacuum chamber. The vacuum-pumping effect can be improved, interference of volatile component gas on material falling film flowing is reduced, and meanwhile the inner component is compact in structure and easy to industrially amplify.

The invention relates to the field of sludge drying, and particularly discloses a closed MVR sludge drying device which is characterized in that a drying conveying belt, a heating roller, a roller scraper, a discharging mechanism and a discharging conveying belt are mounted in a box body, a spiral feeder is mounted on the left side of the upper end of the box body and communicates with the box body through a feeding disperser, and a discharging conveying belt is mounted in the box body. The discharge hole is formed in the left side of the lower end of the box body; two layers of heating rollers are arranged in the drying conveying belt, a roller scraper is installed between the heating rollers, and a discharging mechanism is arranged at the right end of the drying conveying belt. The right end of the upper portion of the box body is sequentially connected with the filter, the vacuum pump and the compressor, the compressor is connected with a steam inlet of the heating roller through the three-way valve and the movable and static connector, and a steam outlet of the heating roller is connected with the steam-liquid separator. According to the MVR sludge drying device, direct mass and heat transfer between sludge and heating steam can be well avoided, and the working efficiency of the MVR sludge drying device is improved.

The invention relates to the technical field of vacuum glass processing equipment, and particularly discloses a continuous vacuum glass edge sealing heating furnace which comprises a furnace body, a feeding area, a preheating area, a heating edge sealing area, a cooling area and a discharging area are sequentially arranged in the furnace body from left to right, and a plurality of furnace doors are arranged in the furnace body. The feeding area, the preheating area, the heating edge sealing area, the cooling area and the discharging area are separated through furnace doors, the upper ends and the lower ends of the feeding area, the preheating area, the heating edge sealing area, the cooling area and the discharging area are fixedly connected with rails, the two rails are slidably provided with movable clamping mechanisms, and the movable clamping mechanisms are used for fixing glass bricks. The glass brick semi-finished product is conveyed to the heating edge sealing area through the movable clamping mechanism, and edge sealing treatment on the semi-finished product is achieved. And then, the glass bricks are cooled in the cooling area through the heat recovery mechanism, meanwhile, the heat recovery mechanism redistributes released heat to the preheating area, preheating is provided for production of the next batch of glass bricks, and therefore energy is effectively saved.

The utility model provides a vacuum freeze drying system which comprises a vacuum stock bin, an inner heat exchange pipeline, a refrigeration pipeline and a heating pipeline, the vacuum stock bin is used for containing materials so as to conduct vacuum freezing and drying on the materials, and a cold trap is arranged in the vacuum stock bin; the inner heat exchange pipeline comprises a connector pipeline installed in the vacuum stock bin and a heat exchange plate which is arranged on the skip car and can be connected into the connector pipeline. The refrigeration pipeline can selectively communicate with the inner heat exchange pipeline and / or the cold trap and is used for freezing materials on the heat exchange plate or capturing steam in the vacuum stock bin; the heating pipeline can communicate with the inner heat exchange pipeline and heat the inner heat exchange pipeline so that ice on the materials can be sublimated and dehydrated. The vacuum freeze drying system is compact in structure, small in occupied space, high in working efficiency and good in effect.

The invention discloses vacuum coating equipment and a coating process, and particularly relates to the technical field of coating, the vacuum coating equipment comprises a coating cavity, a first closing door and a second closing door are rotatably mounted on the two sides of the front end of the coating cavity through hinges respectively, and avoiding areas are arranged in the first closing door and the second closing door. Active sealing of the coating cavity is completed through the isolation layer, the vacuum breaking condition in the coating cavity is avoided, the coating efficiency is improved, meanwhile, contact with the external environment is reduced, the probability that the appearance of a product is affected by falling dust, impurities or other pollutants in the environment is reduced, meanwhile, the vacuum mechanism can be actively switched to the deposition area and the avoiding area, and the production efficiency is improved. The vacuum treatment of the two areas is completed, the vacuum state in the deposition area and the vacuum state in the avoiding area are kept, the problem of vacuum breaking cannot occur when the isolation layer carries the two circulating mechanisms to rotate, vacuum recovery does not need to be repeatedly completed for the whole coating cavity, the coating steps are optimized, and the yield is increased.

The automatic cleaning and cooling device is arranged in a fan blade area of an indirect cooling tower and comprises a bottom plate and a top plate, the bottom plate and the top plate are arranged in the lower end space and the upper end space of the fan blade area correspondingly, and a spraying mechanism and a driving mechanism are arranged between the bottom plate and the top plate; the two heat exchange faces of the fan blade area are sprayed, washed and cooled through the spraying mechanism, and the spraying mechanism is driven by the lifting mechanism to move up and down for spraying. The spraying mechanism is driven by the driving mechanism to perform automatic lifting cleaning, so that dust and impurities on the heat exchange surface are flushed, the fan blade area can be cooled, the vacuum degree of the steam turbine is kept within the required range for a long time, the working efficiency of the indirect cooling tower is improved, operation is convenient, the failure rate is low, and the practicability is high. And manual cleaning operation is not needed, time and labor are saved, the actual cleaning efficiency is improved, the risk of manual high-altitude operation is avoided, and long-term safe and stable production of enterprises is facilitated.

The invention discloses a vacuum system for precisely controlling the gas density of a nano-dose detector, and belongs to the field of ionizing radiation nano-dose measurement. The system comprises a vacuum pump set unit, a vacuum degree detection unit and a logic control unit. According to the requirements of the nano dose detector for the vacuum degree and the gas concentration, the working air pressure is within 1 Torr and the air pressure control precision reaches 0.01 Torr through cooperation of a pump set in a vacuum system and PLC logic control and data monitoring. The system can provide gas for generating ionizing radiation and a low-vacuum environment for the nano-dose detector, and ensures that a measurement signal of the nano-dose detector is accurate and stable. The ionization degree of the nano dose detector depends on the vacuum degree in the cavity, and the vacuum degree of the cavity depends on the concentration of gas in the sensitive volume. The method has the advantages of high precision, high accuracy, high reliability and the like. According to the invention, the vacuum environment of the nano-dose detector is constant, the sensitive gas is single, and the precise measurement of the nano-dose detector can be supported.

The invention discloses a rotary sealing mechanism and semiconductor deposition equipment, and belongs to the technical field of semiconductors. The rotary sealing mechanism is applied to the semiconductor deposition equipment, the rotary sealing mechanism is used for sealing a vertically-arranged rotary shaft, the rotary shaft is used for supporting and adjusting a wafer through self rotation, the rotary sealing mechanism comprises a supporting assembly and a sealing piece, and the rotary shaft penetrates through the supporting assembly and the sealing piece. A crimping part spaced from the rotating shaft is arranged on the periphery of the rotating shaft; the sealing piece is clamped between the pressing connection part and the supporting assembly, so that the sealing piece is connected to the periphery of the rotating shaft in a sealed mode, the rotating shaft can rotate around the axis of the rotating shaft and relative to the sealing piece, and the sealing performance between the rotating shaft and the rotating sealing mechanism is guaranteed.

The present invention discloses an integrated water-cooled variable ceramic vacuum capacitor, comprising: an outer shell, a mounting base, a guide sleeve, an adjustment component, a double-layer bellows installed in the outer shell, and an electrode, wherein the mounting base is fixedly mounted on the top of the outer shell, the guide sleeve is fixedly connected to the mounting base, and a water circulation channel is formed between the guide sleeve and the mounting base; the adjustment component comprises a pull rod, which is slidably mounted in the guide sleeve and fixedly connected to the moving electrode of the electrode; the double-layer bellows is sleeved outside the guide sleeve, and the double-layer bellows comprises an inner layer bellows and an outer layer bellows, one end of the inner layer bellows and the outer layer bellows are both fixedly connected to the mounting base, and the other end is both fixedly connected to the moving electrode. The present invention fundamentally changes the manufacturing process of the product by adopting a double-layer bellows structure, greatly saves production costs, and improves production efficiency.

The invention discloses a balance weight filling compaction platform, and belongs to the field of compaction platforms, the balance weight filling compaction platform comprises a base, a balance weight compaction device is fixedly mounted on the inner bottom wall of the base, a vacuum cylinder is fixedly mounted on the balance weight compaction device, a pressing assembly is arranged in the vacuum cylinder, an extrusion assembly is arranged in the vacuum cylinder, and the balance weight compaction device is fixedly mounted on the vacuum cylinder. The vacuum cylinder is fixedly provided with a driving assembly, the counterweight compaction equipment is fixedly provided with a heat conduction cylinder, the heat conduction cylinder is provided with a cooling assembly, the extrusion assembly comprises a first reciprocating lead screw rotationally installed on the inner top wall of the vacuum cylinder, and the inner top wall of the vacuum cylinder is rotationally provided with a second reciprocating lead screw. According to the concrete vibration compaction device, the exhaust effect of concrete in the vibration compaction process can be effectively improved through the continuous low-pressure environment in the vacuum cylinder, and meanwhile through compression and rotation of gas in the vacuum cylinder, the uniformity of the overall temperature of the concrete and the uniformity of overall exhaust of the concrete are facilitated.

The utility model provides an unpowered immersed ultramicro-filtration water production system, which is characterized by comprising a membrane tank and a water production tank, a water production pipe is arranged between the membrane tank and the water production tank, a water inlet and a water outlet are arranged on the water production pipe, effluent of the membrane tank is connected to the water production tank through the water production pipe, and the water production tank is connected with the membrane tank through the water production pipe. An electromagnetic flowmeter, a negative pressure meter and an electric control valve are sequentially arranged on the water production pipe in the water production direction; a membrane frame is arranged in the membrane tank, and a baffle is arranged at the bottom of the water producing tank; and liquid level meters are arranged above the inner walls of the membrane tank and the water producing tank. The liquid level difference between the membrane tank and the water inlet of the water production pipe is utilized, and water production of the system is automatically realized through siphoning, so that the device is simple in structure and low in energy consumption, and the operation cost is saved. Meanwhile, automatic and stable water production of the device is realized through automatic program linkage.

The utility model relates to the field of high-temperature heat pumps, in particular to a vacuum dust removal cloth bag for production of gigging cloth, which comprises a shell and is characterized in that the right end of dust removal cloth is fixedly connected with an installation device, the right end of the installation device is detachably connected with a fixing device, and the left end of the dust removal cloth is fixedly connected with a dust removal device. The left end of the dust removal device is in threaded connection with a rotating device, a vacuum pump is arranged at the left end of the rotating device, the output end of the vacuum pump is fixedly connected with the left end of the rotating device, a cleaning device is arranged on the right side of the dust removal cloth, and the mounting device comprises a fixing ring of which the center is fixedly connected with a sealing gasket; the fixing device comprises a fixing shell. According to the vacuum dust removal cloth bag for production of the gigging cloth, the mounting device, the fixing device, the dust removal device and the rotating device are mutually matched for use, so that the structure can achieve an efficient and convenient dust removal effect, and the whole structure is mutually matched for use, so that the device is more convenient and efficient.

The present invention relates to the technical field of sublimation of coated polymer materials, and in particular to a sublimation device for coated polymer materials, including a seamless pipe, on which are provided: a first fixing component and a second fixing component, wherein the first fixing component is matched with one end of the seamless pipe, and the second fixing component is matched with the other end of the seamless pipe. In the present invention, a guide hole consisting of a first vertical section, a first inclined section, a second vertical section, a second inclined section, a third vertical section and a diffusion section is provided, because the pressure is reduced due to spatial changes, the polymer material in the state of ions or atomic groups is slowed down and diffused, replacing the fixed-point delivery method of the prior art, which helps to ensure the uniformity of the coating of the collection substrate, and senses the temperature in the sedimentation chamber through a temperature controller, so as to heat the collection substrate through a heating plate, thereby reducing the temperature difference between the thin film generated by the collection substrate and the collection substrate during the gas sedimentation process.

The present invention relates to a walking robot for making a substrate conveying robot walk in a vacuum chamber, comprising: a lifting part, which is located in the outer lower area of ​​a shell that seals the inside of the vacuum chamber, and the upper end is sealed and connected to the vacuum chamber through hole formed in the lower area of ​​the shell, so that a hollow lifting drive shaft is formed to move up and down in the vacuum chamber through hole; a walking arm platform, which comprises a 1_1 combination hole, a 1_2 combination hole and a 1_3 combination hole; the first walking arm part comprises a 1_1 walking link arm and a 1_2 walking link arm; the second walking arm part comprises a 2_1 walking link arm and a 2_2 walking link arm; a conveying robot coupling part, whose second front end area is rotatably coupled to the 1_2 other front end area of ​​the 1_2 walking link arm, and the second other front end area is rotatably coupled to the 2_2 other front end area of ​​the 2_2 walking link arm, and a hollow rotating drive shaft is formed in the second central area and is sealed and coupled to a rotating drive motor of the substrate conveying robot for conveying substrates.

The present invention relates to the technical field of degradable polymer compounds, and in particular to an anti-aging heat-resistant polyglycolide injection molding material and a preparation method thereof. The polyglycolide injection molding material comprises, by mass percentage, the following: a main polymer, 45-85%; a reinforcing polymer, 5-15%; an anti-hydrolysis agent, 0.1-1%; a lubricant, 0.1-0.5%; a filler, 5-25%; and a heterogeneous nucleating agent, 3-15%. The main polymer is PGA, the reinforcing polymer is PBS and / or PBAT, and the filler and the heterogeneous nucleating agent are both selected from talcum powder. The toughness of the injection molding material is improved due to the addition of PBS or PBAT. In addition, two types of talcum powders of different particle sizes are used as fillers and heterogeneous nucleating agents, respectively, and after compounding, the mechanical properties of the material can be improved and the aging process of the material can be delayed.

This utility model discloses a carbon-coated composite current collector preparation device capable of uniformly depositing aluminum plating. This utility model relates to the field of composite current collector technology and includes a base. A coating mechanism and a plating mechanism are arranged on the top of the base. The plating mechanism includes a coating machine housing mounted on the base, containing a coating machine, and a controller mounted on the outside of the coating machine housing. The coating mechanism includes a vacuum coating chamber mounted on the base. By providing sealing components on both sides of the substrate entry and exit slots, the substrate can pass through the slots and be sealed, preventing gas molecules from entering the vacuum coating chamber and ensuring the vacuum of the vacuum coating chamber. This prevents impurities from settling on the substrate, which would affect the deposition of aluminum evaporation products on the substrate, thus allowing for uniform aluminum plating deposition on the substrate.

The utility model provides a packaging box for electronic optical lens cones, which comprises a box body, a box cover, a box cover and a box cover, and an equipment cavity for accommodating the electronic optical lens cones is arranged in the box body; the controller is arranged on the box body and is configured to be electrically connected with a vacuumizing device of the electron optical lens cone so as to control the vacuumizing device; and the power supply device is arranged on the box body and is configured to supply power to the controller and the vacuumizing device. According to the packaging box, in the transportation process of electronic optical lens cones such as the electronic optical lens cones, on the basis that the safety of hardware structures is guaranteed, the influence of external interference on the lens cones, especially vibration interference, can be greatly reduced; in addition, the electronic optical lens cone can effectively guarantee high vacuum for a long time, so that a machine can be quickly reset at a client conveniently, the installation time is shortened, and the recognition degree at the client is enhanced.

The utility model relates to glass welding technical field and disclose a kind of glass welding vacuum jig, including base, the top of base is equipped with fixed base, the both sides outer wall of fixed base is fixedly connected with the connecting block of symmetrical distribution, when installation, the output shaft rotation of motor drives bidirectional screw rod rotation and further drives movable plate to move, movable plate moves through connecting rod and drives pressing plate, and further make pressing plate close to fixed base, when positioning plate and fixed base contact, fixed base makes positioning plate move and enter into recess, first spring deformation, glass body along positioning plate enters fixed base, until two groups of glass body are pasted, at this time, the cavity is sealed by first sealing gasket and second sealing gasket, start vacuum pump, vacuum pump carries out vacuumizing in the cavity through conduit, it is convenient to install, ensure that the glass to be welded between is vacuum state, make two layers of glass to be welded stick tighter to reach better welding effect.

The invention belongs to the technical field of string adjustment, and particularly relates to a violin string tension adjustment control device which comprises an adjustment chamber, adsorption units are symmetrically arranged at one end of the adjustment chamber, positioning units are arranged on the sides, close to the adjustment chamber, of the adsorption units, an adjustment unit is arranged on one side in the adjustment chamber, and a feedback unit is arranged on one side of the adjustment unit. Through the lifting effect of the electric telescopic rod and the face-to-face or back-to-back movement between the idler wheels, lifting and sudden release of strings are achieved, then radial jumping of the strings is degraded and buffered through the multi-degree-of-freedom string roller, dominant impact between the lower electrode cap and the electrode ball is controlled through the prying roller short section, and therefore the electrode ball can be driven to move stably and stably. The high-frequency impact state between the strings and the long section of the prying roller is expressed, that is, impact feedback of the strings in a low-frequency state is explicitly and prominently expressed through an extended range, the change of tension is accurately sensed, excessive or insufficient adjustment is avoided, the overall tone balance is optimized, and the harmony degree and expressive force of the tone of the violin are improved.

The utility model discloses a vacuum thermal insulation hot air heating smoking set. The vacuum thermal insulation hot air heating smoking set comprises an electromagnetic coil assembly and a vacuum thermal insulation heating module. The electromagnetic coil assembly comprises a tower type electromagnetic coil with the radius gradually increasing from top to bottom. The vacuum thermal insulation heating module comprises a smoke cup and a thermal insulation sleeve, and a vacuum space is formed between the outer wall of the smoke cup and the inner wall of the thermal insulation sleeve; the electromagnetic coil assembly is arranged on the periphery of the vacuum thermal insulation heating module in a sleeving mode. According to the vacuum thermal insulation hot air heating smoking set, the utilization rate of the cigarette core is increased; the service life of the smoking set is prolonged.

The present invention discloses an experimental device and test method for simulating a low vacuum transport pipe network structure, including an assembled low vacuum flexible pipe, a temperature control system, a particle release instrument, a vacuum control system, an infrared thermal imager and a 3D3C PIV system, which are used to monitor the position and change state of the inductive particles inside the assembled low vacuum flexible pipe; a data receiving terminal, which is used to receive and analyze the data of the temperature control system, the particle release instrument, the infrared thermal imager and the 3D3C PIV system, judge the data changes of the stress, temperature and air pressure inside the assembled low vacuum flexible pipe, and determine the sealing effect of the assembled low vacuum flexible pipe. The present invention has the ability to stretch and bend, effectively ensures the airtightness of the low vacuum tunnel structure, and can improve the ability of the tunnel structure to adapt to different deformations caused by temperature, pressure, etc.

The application discloses a kind of forging station automation unloading and loading device and control method thereof, it is related to the technical field of automation conveying, including base and mechanical arm, one end of mechanical arm is connected with base by moving platform, and the other end of mechanical arm is provided with actuating mechanism, rotating drive element is arranged in the moving platform, and the rotating drive element is connected with base by transmission unit, compared with the current forging station automation unloading and loading device of the present application is provided with locking mechanism, effectively resists the platform micro-motion or deviation caused by load eccentricity, inertia impact and forging process vibration, while avoiding the fixed counterweight structure set in traditional equipment for balancing moment, significantly reduce the overall weight of equipment, reduce driving energy consumption, secondly, the layout of the present application can be flexibly adjusted by first linear drive element and second linear drive element Suction solid component in actuating mechanism, so as to adapt to the production demand of multi-specification forging product.

A non-standard vacuum insulation panel includes a vacuum insulation panel and an organic insulation panel. The organic insulation panel has a recessed portion in the middle for the vacuum insulation panel to be inserted. The vacuum insulation panel is placed into the recessed portion, and during installation, it is bonded to the organic insulation panel using polyurethane adhesive to improve the fixing effect. The depth of the recessed portion is not less than 20mm, and the thickness of the vacuum insulation panel is 5-8mm less than the depth of the recessed portion. Therefore, after the vacuum insulation panel is placed into the recessed portion, there is a gap between the upper surface of the vacuum insulation panel and the upper surface of the organic insulation panel, enhancing the thermal insulation effect of the wall. This invention, through this combined structure of the vacuum insulation panel and the organic insulation panel, ensures excellent thermal performance of the components while facilitating the integrity of the components during construction. It meets the requirements of high-efficiency energy-saving walls while reducing the cost of the composite panel.

The utility model discloses a pressure control system and a pressure control valve, and relates to the technical field of secondary battery production. The pressure control system may include: a vacuum pump; a positive pressure gas source; the formation gas path is connected with an external secondary battery; a pressure control valve; the pressure control valve comprises a valve body, a first channel arranged on the valve body and connected with a vacuum pump, a second channel connected with a formation gas circuit, a third channel connected with a positive pressure gas source, a pilot cavity arranged in the valve body, a valve element and a sealing structure connected with the valve element. The sealing structure comprises a first sealing piece used for regulating and controlling the opening degree of the first channel and a second sealing piece used for regulating and controlling the opening degree of the third channel, and the width of a first cavity area, used for containing the second sealing piece, in the valve body is consistent with that of a second cavity area in the valve body. According to the pressure control system, through a simple gas circuit design, formation processes of different secondary batteries and different gas pressure requirements are met.

The utility model discloses a high-density closed felt structure which comprises a flannelette surface layer, a flannelette core layer, a flannelette bottom layer, a first base cloth layer and a second base cloth layer, the first base cloth layer comprises first warp yarns, second warp yarns and first weft yarns; third weft yarns corresponding to the first warp yarns in the first base cloth layer and the second base cloth layer are arranged in the flannelette core layer; flannelette water absorption cavities are formed among the first weft yarns, the second weft yarns and the third weft yarns; the high-density base cloth layer is formed by the first warp yarns, the second weft yarns and the first weft yarns of the first base cloth layer and the second base cloth layer, so that more water can seal gaps of the coarse cotton cloth, the coarse cotton cloth is more closed and airtight, the vacuum degree of vacuum equipment is conveniently kept during vacuum dewatering, dewatering of the coarse cotton cloth is more sufficient, the dryness of the coarse cotton cloth is improved, and the service life of the coarse cotton cloth is prolonged. And flannelette water absorption cavities are formed among the first weft yarns, the second weft yarns and the third weft yarns, so that the water absorption capacity is effectively improved, and the dryness of the paper sheet is improved.

The utility model discloses an air heater system. The system is applied to an air preheater in a thermal power generating unit and comprises a steam adjusting module, an air heater body, a drainage pressure balance module, a drainage recovery module, a condensation module and a control module. The steam adjusting module is communicated with a steam inlet of the air heater body; a drain outlet of the air heater body is communicated with an inlet of the drain recovery module; an outlet of the hydrophobic recovery module is communicated with the condensation module; the drain pressure balance module is arranged between the drain recovery module inlet and the drain recovery module outlet through a pressure balance pipeline; the control module is electrically connected with the steam adjusting module and used for adjusting the steam output amount of the steam adjusting module. According to the scheme, vapor-liquid vibration and unsmooth drainage are avoided, and normal operation of the system is guaranteed; meanwhile, the utilization rate of condensate water is increased, and the energy-saving effect is improved.

The invention belongs to the technical field of semiconductors, and discloses an uncooled infrared detector pixel-level packaging structure and a preparation method thereof, and the method comprises the steps: manufacturing MEMS micro-bridge structures on a readout circuit substrate based on a sacrificial layer, and enabling the MEMS micro-bridge structures to be covered with pixel packaging structure cavities; a deposition hole is formed in the pixel packaging structure cavity, and the sacrificial layer below the deposition hole is etched; depositing a getter into the cavity of the pixel packaging structure through the deposition hole; the getter film layer above the pixel packaging structure cavity is removed, and release of the sacrificial layer is completed through the deposition hole; and finally, plating a hole sealing film layer outside the cavity of the pixel packaging structure to seal the deposition hole so as to complete sealing of the cavity of the pixel packaging structure. According to the invention, the preparation of the getter is designed at the last stage of the whole set of MEMS process, the influence of the previous processes on the getter is avoided, the getter is activated in a high-temperature thermal activation mode, and the vacuum degree of the detector cavity is ensured.

The present invention relates to the field of vacuum coating technology, and discloses a multi-chamber vacuum coating equipment, which includes a plurality of chambers, each chamber includes two oppositely arranged chamber walls, wherein an isolation gate valve is arranged between an inlet and outlet chamber and an adjacent chamber, and further includes a chamber door, wherein the chamber door, the chamber wall and the isolation gate valve jointly enclose the inlet and outlet chamber, and the chamber door is movably hinged on the inlet and outlet end of the inlet and outlet chamber so that the chamber door forms a mounting portion toward one side of the inlet and outlet chamber. The invention has the advantages of reducing cost and floor space.

The utility model discloses a multifunctional desk lamp holder. The multifunctional table lamp holder comprises a table lamp holder mechanism and a suction cup fixing assembly, the table lamp holder mechanism comprises a table lamp base, a through hole groove is formed in one end of the table lamp base, a guide sleeve is installed in the through hole groove, and a groove hole of a sealing structure is formed in the guide sleeve; the multifunctional desk can effectively solve the problem of placement when the desktop space is narrow or many articles are placed, can avoid the situation that the desk lamp cannot be placed due to the fact that the space on the desk is narrow or insufficient, effectively saves the space utilization of the desk, enables a working or learning area to be wider by fixing the desk lamp on the side face of the desk, and facilitates placement of other necessities. The stability of the table lamp can be improved, and the risk that the table lamp falls down due to accidental touch is reduced.

The invention relates to an engine, in particular to an air pressure vacuum potential energy engine which comprises a machine shell and an end cover and further comprises a hollow shaft, a plunger mounting cylinder, a plunger, an air cylinder cover and a sealing connecting cover. A plunger mounting cylinder is sleeved outside the hollow shaft, and a vacuum chamber for vacuumizing is formed by a cavity among the sealing connecting cover, the hollow shaft and the plunger mounting cylinder; two ends of the plunger mounting cylinder are connected with sealing connecting covers; a plunger mounting hole is formed in the plunger mounting cylinder along the tangential direction of the inner circumference of the plunger mounting cylinder; a plunger is arranged in the plunger mounting hole; cylinder covers are mounted at the tops of the plungers; the plunger is connected with a stress wheel on the hollow shaft through a connecting rod; the plunger mounting cylinder is sleeved with a machine shell. End covers are installed at the two ends of the machine shell and arranged on the center shaft in a sleeved mode through bearings. The energy consumption of a power source of the engine is reduced, certain environment-friendly and energy-saving effects are achieved, and the cost is reduced.