42results about How to "Guaranteed vacuum tightness" patented technology

A refrigerating machine jacket structure for a superconduction magnet and an installation and disassembly method of the refrigerating machine jacket structure relate to the technical field of low-temperature engineering and superconduction magnets. The refrigerating machine jacket structure sequentially comprises a refrigerating machine flange seat (3), a primary corrugated pipe (11), a primary flange seat (12), a secondary corrugated pipe (21) and a secondary flange seat (22) from top to bottom, wherein thermal connection is formed between a cold screen and the primary flange seat 12), thermal connection is formed between a superconduction coil and the secondary flange seat (22), the refrigerating machine flange seat (3) and the primary flange seat (12) are connected by the primary corrugated pipe (11), and the primary flange seat (12) and the secondary flange seat (22) are connected by the secondary corrugated pipe (21). The refrigerating machine jacket structure has the characteristics of low conduction thermal leakage, high vacuum tightness, high thermal connection efficiency and long lifetime of a refrigerating machine.

The invention discloses a making process of a wind-power blade main model, which belongs to the technical field of wind-power blade molding. The process comprises the following steps of: 1) making a metal steel frame platform at the bottom; 2) laying a wood plate; 3) coating epoxy resin white carbon black filler on the surface of the wood plate, placing multiple EPS (Expandable Polystyrene) polystyrene solid foams according to the shape of the designed main model in a laminated way, and bonding and fixing the EPS polystyrene solid foams; 4) machining profiles of the EPS polystyrene solid foams; 5) pasting glass fiber reinforced plastic airtight layers on the machined profiles in the step 4); 6) detecting the vacuum degrees of the glass fiber reinforced plastic airtight layers; 7) uniformly spreading wood substituted epoxy resin layers on the surfaces of the glass fiber reinforced plastic airtight layers which satisfy the vacuum degree requirements, controlling the spreading thicknesses at about 15-35 mm and curing the wood substituted epoxy resin layers at normal temperature; and 8) machining the surfaces of the wood substituted epoxy resin layers; and then coating gel coat layers on the wood substituted epoxy resin layers and curing and molding the wood substituted epoxy resin layers to obtain the main model. The main model made by using the process disclosed by the invention has the advantages of high profile precision, easiness for construction operation, low making cost as well as contribution to promotion and application.

An atmospheric pressure interface device and mass spectrometer; the atmospheric pressure interface device comprises an interface end plate (1) and a sealing device (3); the interface end plate (1) is provided with a through hole (10) thereon; the through hole (10) comprises a tapered hole portion (100) and a cylindrical hole portion (101); the tapered hole portion (100) is in a conical barrel shape, and the end having a larger hole diameter opens on one surface of the interface end plate (1), and corresponds to the sealing device (3); the cylindrical hole part (101) has a cylindrical barrel shape, and one end opens on the other surface of the interface end plate (1), and the other end is connected to the end of the tapered hole portion (100) having a smaller hole diameter; the center line of the tapered hole portion (100) coincides with the center line of the cylindrical hole part (101); and the sealing device (3) is provided outside the interface end plate (1), and seals the through hole (10) in an opening/closing manner. The atmospheric pressure interface device ensures the ion transmission rate and the vacuum sealing performance of a vacuum chamber (4). The mass spectrometer of the present invention is easy to manufacture and has a wide application prospect.

The invention discloses a method for manufacturing high-heat-conductivity molybdenum-copper-nickel alloy. The method includes steps of firstly, mixing: weighing mixed powder of Mo (molybdenum) powder, Cu(copper) powder and Ni (nickel) powder to stir on a centrifugal ball mill for 4 hours; secondly, pressing: placing the mixed powder stirred uniformly into a pressing die for blank pressing; thirdly, sintering in vacuum: placing pressed blank into a vacuum furnace to sinter at a high temperature; fourthly, impregnating copper: melting oxygen-free copper in a hydrogen atmosphere furnace, placing the blank sintered in vacuum to impregnate in melted copper liquid; fifthly, turning: turning the impregnated blank according to the requirements, removing surplus copper layers on the surface; and sixthly, scouring: impregnating turned parts into solution to scour, washing the parts by tap water, and dewatering and drying the parts by alcohol. The molybdenum-copper-nickel alloy manufactured by the above method can be used for metal ceramic structures of high-power traveling wave tubes such as energy transmission windows and collector electrodes and key parts having high requirements for heat radiation.

The invention provides LED light-emitting glass used for an outdoor curtain wall and a preparation method of the LED light-emitting glass. The LED light-emitting glass comprises glass layers, a glue clamping layer, an infrared inflection layer, an electric conduction layer, LED lamps, sealing layers and a protection layer. The glass layers include the first glass layer, the second glass layer and the third glass layer which are stacked from top to bottom. The glue clamping layer is arranged between the first glass layer and the second glass layer. The infrared reflection layer is arranged on the lower surface of the second glass layer. The electric conduction layer is arranged on the upper surface of the third glass layer, and circuit grooves are etched in the electric conduction layer. The LED lamps adhere to the circuit grooves through electric conduction silver glue. The seams of the glass layers are filled with the sealing layers. The peripheries of the glass layers are coated with the protection layer. By means of the LED light-emitting glass, the characteristics of LED glass and vacuum glass can be effectively combined, the anti-explosion performance and the heat preservation and thermal insulation property of the LED light-emitting glass are enhanced, and the LED light-emitting glass is suitable for the outdoor curtain wall.

The invention discloses a vacuum defoaming device. The vacuum defoaming device comprises a vacuum chamber used for accommodating workpieces; the vacuum chamber is connected with a vacuum pump and a high pressure air injection nozzle; the high pressure air injection nozzle is opened, and high pressure air enters into the vacuum chamber quickly, so that foams on the surfaces of colloids on the workpieces break because of rapid change of inside-outside pressure different, and the high pressure gas which enters into the vacuum chamber quickly is applied onto the surfaces of the foams so as to broke the foams. Excellent defoaming effect can be achieved; product surface quality is increased; vacuum sealing effect of the workpieces is ensured; and product quality is improved.

The invention provides an energy transmission window sheet for a terahertz band vacuum device. The energy transmission window sheet comprises a composite diamond film and a micron crystalline diamondfilm and an ultra-nanocrystalline diamond film or a nanocrystalline diamond film which are sequentially grown on the nucleation surface of the composite diamond film, wherein the nucleation surface ofthe composite diamond film is subjected to the treatment of removing the surface layer containing defects and non-diamond phases. The re-grown ultra-nanocrystalline on the nucleation surface of the energy transmission window sheet has high fracture strength and low THz wave loss. The surface roughness of the nucleation surface can be properly improved by the re-grown micron crystalline diamond sothat the bonding force between the nucleation surface and the subsequent metallization layer can be increased, peeling or falling off the metallization layer can be prevented and the sealing performance and the sealing yield of the energy transmission window can be improved.

The invention provides metal net anti-explosive vacuum thermal insulation glass and a preparing method thereof. The glass comprises a glass layer comprising a first glass layer, a second glass layer and a third glass layer from top to bottom, a glue clamping layer arranged between the first glass layer and the second glass layer, a metal net embedded into the glue clamping layer, an infrared reflection layer arranged at the upper surface of the third glass layer, a strain protection layer arranged at the upper surface of the infrared reflection layer, a sealing layer coating one side of the glass layer along a direction vertical to the glass layer, a protection layer longitudinally coating the outer side of the sealing layer, and a group of supporters arranged between the second glass layer and the strain protection layer. Thermal insulation and anti-explosive performances of the vacuum glass are effectively improved.

The invention discloses a discharge device of a vacuum drying device. The discharge device is connected with a discharge port of a drying cylinder and comprises an outer sleeve, an upper discharge pipe, a lower discharge pipe, a valve seat and a valve plate. The outer sleeve is sleeved outside the lower discharge pipe, the bottom of the outer sleeve and the bottom of the lower discharge pipe are both communicated with the discharge port, the upper discharge pipe is arranged above the outer sleeve, the valve seat is provided with a valve hole and fixedly arranged at the upper end of the outer sleeve, a lifting driving mechanism is further arranged on the upper discharge pipe and can be used for controlling the upper discharge pipe to penetrate through the valve hole to butt against or be separated from the lower discharge pipe, the valve plate is arranged above one side of the valve seat, and a translation driving mechanism is arranged at one end of the valve seat and used for controlling the valve plate to be closed horizontally or open the valve hole. The discharge device can guarantee vacuum tightness of the drying cylinder when the drying cylinder performs drying and can guarantee smooth discharge of a discharge pipe during discharge. Through clearance arrangement of the valve hole and the lower discharge pipe, the valve plate or a valve can be prevented from being clamped by inlet-outlet materials effectively, and air tightness of the discharge device is improved.

The invention discloses a preparation method of an aluminum-based ceramic composite material. A porous ceramic blank is placed into a lower cavity of a hearth, an aluminum ingot is placed into an upper cavity of the hearth, vacuum heat injection squeezing-infiltration is performed, a sintering furnace is closed after infiltration, vacuum is pumped and kept, temperature is kept after one-time temperature rise, a manual valve is opened, inert gas is injected, infiltration is finished under atmospheric pressure, and finally, furnace cooling is performed to reach room temperature after infiltration to prepare the aluminum-based ceramic composite material. By vacuum heat injection squeezing sintering, the aluminum-based ceramic composite material is successfully prepared, the prepared aluminum-based ceramic composite material meets strength requirements and machining requirements, and the preparation method is simple in process, easy in operation and suitable for manufacturing parts needinglight weight, good conductivity, high strength and high temperature resistance.

The invention provides a semiconductor device and a using method thereof. The semiconductor device comprises a transition cavity, at least one carrying table, a cooling plate, an air extraction port,and an exhaust port, wherein the transition cavity is arranged in front of a growth cavity; the at least one carrying table is arranged in the transition cavity, and allows at least one tray to be placed, the tray allows a substrate to be placed, and the at least one carrying table is allowed to rise and/or fall; the cooling plate is arranged in the transition cavity, and the cooling plate and theat least one carrying table are oppositely arranged; the air extraction port is arranged on one side of the transition cavity, and the transition cavity is vacuumized through the air extraction port;and the exhaust port is arranged on one side of the transition cavity, and the transition cavity is subjected to vacuum breaking treatment through the exhaust port. The semiconductor device is simplein structure and is capable of improving the uniformity of coatings. The invention further provides the using method of the semiconductor device.

The invention relates to the technical field of vacuum chambers, in particular to an optical fiber leading-in device and an optical fiber leading-in method for a vacuum chamber. The invention aims to provide an optical fiber leading-in device and an optical fiber leading-in method which are higher in air tightness when an optical fiber is led into a vacuum cavity. The optical fiber leading-in device comprises a blocking piece, a glue pouring seat, a vacuum pouring glue layer and a sealing bonding glue layer, a first groove body is formed in the edge of the blocking piece, a first annular boss and a second annular boss are arranged on the inner wall of the glue pouring seat, a second groove body is formed in the edge, close to a center hole, of the first annular boss, and a third groove body is formed in the edge, close to the center hole, of the second annular boss. The first groove body and the second groove body correspond to each other, the blocking piece is placed on the first annular boss, the blocking piece and the first annular boss are connected with each other, the first groove body and the second groove body which correspond to each other form a fixing groove used for containing a bare wire of one optical fiber, and the vacuum pouring sealant layer covers the blocking piece. And the sealing adhesive layer is covered on the vacuum pouring sealant layer.

The invention discloses a post-tensioning prestressed box girder double-duct type vacuum-assisted mud jacking system and a construction method thereof. A sealing assembly seals the two ends of two prestressed reinforcement ducts respectively, the two ends of a communicating pipe are in sealed connection with the tail ends of the two prestressed reinforcement ducts respectively, and a vacuum degreemeasuring piece is used for measuring the vacuum degree of the prestressed reinforcement ducts; an vacuum-assisted mud jacking machine comprises a mud stirring bin provided with a mud inlet and a stirring mechanism, a mud jacking pump with the inlet connected with the mud stirring bin, a waste mud bin provided with a pressure release valve, a negative pressure bin, and a vacuum pump with the inlet connected with the negative pressure bin. The outlet of the mud jacking pump is divided into two paths, one path is in sealed connection with one prestressed reinforcement hole channel through a mudjacking pipe with a first valve, the other path is communicated with the waste mud bin through a pipeline with a second valve, and the waste mud bin is in sealed connection with the head end of the other prestressed reinforcement hole channel through a vacuum pipe with a third valve. The negative pressure bin is communicated with the waste mud bin through a pipeline with a fourth valve. Double-hole-channel one-time grouting can be achieved, and operation is convenient and fast.

The invention belongs to the field of magnetic confinement fusion (MCF) technologies, and particularly relates to an ultrahigh vacuum sealing flange structure for a non-circular channel of a large Tokamak vacuum chamber. The structure comprises a concave flange, a convex flange and a connecting pipe. Two matched 90-degree sealing steps are machined on the inner sides of the opposite end faces of the concave flange and the convex flange, and a copper wire ring is placed between the two sealing steps, so that a gap is reserved between the concave flange and the convex flange in the axial direction; and the concave flange and the convex flange are connected through a double-end threaded pin or a double-end stud. By means of the structural mode that the oxygen-free copper wire is compressed through the 90-degree sealing steps, the ultrahigh vacuum sealing requirements of non-circular channel window flanges of different shapes can be met, and the machining and maintaining difficulty of thesealing face of a non-circular window is reduced.

The invention discloses a method for manufacturing a water collecting pipe in a vacuum chamber of a Tokamak device. The method comprises the following steps: respectively blanking a main pipe and a branch pipe of the water collecting pipe; a bottom hole is machined in the position of the branch pipe on the main pipe; a branch pipe flange of the main pipe is drawn out at each bottom hole, the pipe drawing area of the main pipe is heated to 900-1150 DEG C during drawing, and the length of the outer surface of the drawn branch pipe flange is larger than or equal to 3 mm; welding grooves in the welding positions of the main pipe, the branch pipe and the end socket are machined respectively; welding the branch pipes and the end sockets; the thickness of the pipe wall of the main pipe is 2-3 mm, and the thickness of the wall of the branch pipe is 2 mm. The branch pipe flanges are drawn on the main pipe, so that the welding difficulty of the branch pipes and the number of welding seams are reduced, the welding seams can be subjected to radiographic inspection, and the vacuum airtightness and the long-term use quality of the water collecting pipe are guaranteed; and the deformation resistance of drawing is reduced by high-temperature drawing, so that the relative permeability can be stably kept to be less than 1.04.

The invention relates to the technical field of vacuum arc-extinguishing chambers, and particularly discloses an improved vacuum arc-extinguishing chamber, which comprises an insulating shell, a static contact and a movable moving contact. A corrugated pipe and a shielding cylinder are positioned in the insulating shell, the corrugated pipe sleeves the outer side of the moving contact, and a firstsolder ring is welded to seal a gap between one end of the corrugated pipe and the insulating shell; the second welding flux ring is used for welding and sealing a gap between the other end of the corrugated pipe and the moving contact; the shielding cylinder surrounds and sleeves the outer side of the first contact and the outer side of the second contact; the third solder ring is welded with the shielding cylinder and the insulating shell; the fourth solder ring is used for welding and sealing a gap between the static contact and the insulating shell. By means of the arrangement of the first solder ring, the second solder ring and the fourth solder ring, welding sealing of the first contact, the second contact and the insulating shell is achieved, and the vacuum sealing performance of the first contact and the second contact is fully guaranteed. By means of the arrangement of the third solder ring, stable connection between the shielding cylinder and the insulating shell is achieved, and the electromagnetic shielding performance of the first contact and the second contact is fully guaranteed.

The invention discloses a capacitor dry vacuum environment packaging group. Through the arrangement of a vacuum chamber upper cover, a vacuum chamber lower cover and a vacuum pumping pipe, a very goodair drying environment can be provided when the capacitor is subjected to vacuum packaging work, and the normal operation of the vacuum packaging work of the capacitor and the vacuum packaging quality can be guaranteed. By arranging a sealing strengthening structure, a good strengthening and sealing effect on the connection and sealing of the vacuum chamber upper cover and the vacuum chamber lower cover is realized, the quality of the vacuum environment is guaranteed, and further the vacuum packaging quality of the capacitor is guaranteed. Through the sealing connection of an arranged rubbersealing ring, a rubber sealing round block and an aluminum shell, the vacuum tightness is guaranteed. By arranging a clamping groove, a circular sealing groove, a circular sealing ring and an elasticclamping block, the connecting, sealing and fixing functions of the rubber sealing ring and the aluminum shell and the sealing and fixing functions of the rubber sealing circular block and the rubbersealing ring are guaranteed, and then the vacuum sealing performance of the capacitor is improved.