9 results about "Diffusion pump" patented technology

The present application relates to the technical field of cold trap, and particularly relates to a high-efficiency diffusion pump cold trap, which comprises a cold trap shell, the cold trap shell comprises a cold trap shell body and a cold trap cover body; further comprising a condensing assembly, the condensing assembly comprises a cylindrical main condensing cavity, a plurality of sub-condensing cavities and a coil condensing pipe; the inside of the main condensing cavity forms a main condensing cavity; one end of the sub-condensing cavity extends into the main condensing cavity along the radial direction of the main condensing cavity to form a condensing connecting part, and the other end of the sub-condensing cavity extends out of the condensing diffusion part along the radial direction of the main condensing cavity; the inside of the sub-condensing cavity forms a sub-condensing cavity; the plurality of sub-condensing cavities are respectively communicated with the main condensing cavity; the coil condensing pipe is in contact with the inner wall of the main condensing cavity; and the coil condensing pipe is also respectively in contact with the condensing connecting parts of the plurality of sub-condensing cavities. The present application can efficiently condense the oil vapor and other gas molecules generated by the diffusion pump, and significantly improves the efficiency of the oil vapor trapping, adsorbing and condensing.

The utility model discloses a cooling device for a high-vacuum heat treatment furnace. The cooling device comprises a cold trap and a main valve, one end of the cold trap is connected with the closed cavity of the high-vacuum heat treatment furnace through the main valve, and the other end of the cold trap is connected with the oil diffusion pump, so that the closed cavity of the high-vacuum heat treatment furnace can be communicated with the oil diffusion pump through the main valve via the cold trap; and a workpiece is arranged in the closed cavity of the high-vacuum heat treatment furnace. The utility model relates to the technical field of vacuum heat treatment furnaces, and can solve the problem that no device for preventing the oil return phenomenon of a diffusion pump of a high-vacuum heat treatment furnace exists in the prior art.

The utility model discloses an efficient vacuum pump set system, including: initialized pump set, molecular pump set and diffusion pump set, the initialized pump set is respectively communicated with the molecular pump set, the winding chamber of vacuum coating machine and the coating chamber of vacuum coating machine, the molecular pump set is communicated with the winding chamber, and the diffusion pump set is communicated with the coating chamber of vacuum coating machine. The diffusion pump set is respectively communicated with the winding chamber and the coating chamber, and the winding chamber is communicated with the coating chamber; a first baffle valve and a fourth baffle valve are respectively arranged on a connecting pipeline of the diffusion pump set and the winding chamber, the first baffle valve is close to one end of the winding chamber, and the fourth baffle valve is close to one end of the diffusion pump set; and a third baffle valve is arranged on a connecting pipeline of the diffusion pump set and the coating chamber. Vacuum pumping is achieved through the multiple stages of pump sets, the diffusion pump sets are matched with the corresponding baffle valves, the number of times of opening and closing of the diffusion pump sets in the continuous production process can be reduced through a self-circulation air pipe channel, and production efficiency is improved.

The invention relates to the technical field of thermal diffusion pumps, in particular to a thermal diffusion pump heating structure and a diffusion pump, and the thermal diffusion pump heating structure comprises a controller which is used for converting alternating current into superaudio current; the heating coil is connected with the controller and used for converting the ultrasonic frequency current into a magnetic field; the vortex plate is connected with the diffusion pump and used for converting the magnetic energy into heat energy to heat an oil pan at the bottom of the diffusion pump. According to the electromagnetic induction principle, the controller is used for generating ultrasonic frequency current to drive the heating coil to generate a high-speed alternating magnetic field, so that heat is directly and quickly generated in the vortex plate due to the vortex effect, and the vortex heat effect is generated in the extremely thin skin depth of the surface of the vortex plate, so that the thermal inertia is extremely small; and the system can quickly start heating.

This utility model relates to the field of high-purity quartz glass processing, and specifically to a high-pressure vacuum electric melting furnace. The utility model includes a furnace body assembly, a hot zone assembly, a vacuum system, a pressurization system, a stirring mechanism, and a rotating mechanism. The furnace body assembly includes an upper furnace body, a lower furnace body, and a locking ring assembly, which seals the upper and lower furnace bodies. The hot zone assembly includes an upper insulation screen assembly, a middle insulation screen assembly, a lower insulation screen assembly, a main heater, and a bottom heater. The lower part of the hot zone assembly is limited by a hot zone fixing bracket, and the lower insulation screen assembly moves up and down via an insulation lifting assembly. The vacuum system includes a dry pump, a diffusion pump, a pre-evacuation valve, a high-pressure butterfly valve, a high-pressure valve, a pre-stage valve, a vacuum gauge, and a filter. The pressurization system includes a low-pressure tank, a high-pressure tank, a mass flow meter, a one-way valve, a high-pressure inlet valve, and a gas source. The stirring component in the stirring mechanism can move up and down to stir the material. The rotating component in the rotating mechanism drives the crucible to rotate via a motor.

The invention provides a device and method for improving the forming quality of a titanium alloy anti-gravity investment casting piece, and belongs to the technical field of titanium alloy anti-gravity investment casting. The problem that a certain amount of inert gas is required to be filled in the smelting process of the titanium alloy, and the contradiction exists between the gas content in the mold shell and the gas content in the mold shell is lower is solved. Wherein the first vacuumizing assembly is used for realizing primary vacuum and secondary vacuum of the upper working tank and the lower working tank; the second vacuumizing assembly is used for achieving ultimate vacuum of the upper working tank and the lower working tank, in the second vacuumizing assembly, a negative pressure vacuum tank is communicated with the upper working tank through a second upper working tank vacuumizing valve, a second sliding valve pump, a second roots pump and a second low valve are sequentially communicated with the negative pressure vacuum tank, and a diffusion pump is communicated with the negative pressure vacuum tank through a second main valve; and the diffusion pump is communicated with the second roots pump through a high valve. The device is high in ultimate vacuum pumping efficiency and high in speed for the anti-gravity investment casting device for the titanium alloy, and the forming quality of castings is improved.

The application discloses a diffusion pump lubricating oil composition, which comprises the following components in percentage by mass: ionic liquid 0.2-3%; anti-foaming agent 0.005-0.03%; and the balance is base oil. The diffusion pump lubricating oil composition has the following advantages: on the one hand, the main component of the diffusion pump lubricating oil is ionic liquid, which has good solubility in methylphenyl silicone oil; on the other hand, the diffusion pump lubricating oil has excellent corrosion resistance (the corrosion grade of copper sheet at 100 DEG C for 3 hours is less than or equal to 1), rust resistance (liquid phase rusting is qualified) and anti-foaming property (foam tendency / foam stability is less than or equal to 10 / 0 mL / mL), especially excellent corrosion resistance. The diffusion pump lubricating oil is used in bearings and shaft seals in the cavity of a diffusion pump, can play an excellent lubricating role, prolong the service life of the diffusion pump and broaden the use range of the diffusion pump.

The invention relates to the technical field of molecular distillation, in particular to a multi-stage series feed preheating system of molecular distillation equipment, which comprises a material conveying module, a pretreatment module, a gradient preheating module and a waste heat recovery, the material conveying module realizes material split-flow conveying through a material conveying pipeline, a feeding pipe, a material box and double main pipes; the pretreatment module is used for cooperatively adjusting the material viscosity through a stirrer, a speed reducer and a viscosity sensor; the gradient preheating module comprises a low-stage preheating unit, a middle-stage preheating unit and a high-stage preheating unit, each stage is provided with an independent preheater and is connected in series, the low-stage preheating unit is provided with a waste heat recovery tank, the middle-stage preheating unit is provided with a conduction oil cooling tank with a conduction oil branching valve, the high-stage preheating unit is provided with a heat exchanger, and the molecular distillation retort is provided with a condenser and a diffusion pump. And a condensation heat exchange coil pipe between the condenser and the diffusion pump is connected with a waste heat recovery tank. According to the system, the temperature is accurately controlled through three-stage gradient preheating, and the distillation separation purity and yield are improved; and multi-path waste heat recovery is achieved, and energy consumption is reduced.

The application relates to the technical field of atomic gas chamber manufacturing, in particular to a vacuum heating reduction preparation system of alkali metal elements. The vacuum heating reduction preparation system of alkali metal elements comprises a reaction container, a glass vacuum device, a first heating piece, a second heating piece and a temperature control device. The glass vacuum device comprises a glass diffusion pump and a mechanical pump, one side of the glass diffusion pump is connected with the reaction container, and the other side is connected with the mechanical pump. The first heating piece is used for heating the mixed materials in the reaction container, and the second heating piece is used for baking and degassing the reaction container. The temperature control device is electrically connected with the first heating piece and the second heating piece. The glass diffusion pump is used as a main pump, which is beneficial to removing the gas in the system before the reaction and the gas generated during the reduction reaction, improves the ultimate vacuum degree of the system, and obviously enhances the alkali metal vapor corrosion resistance of the glass vacuum device compared with the metal vacuum device. After long-term use, the vacuum degree of the system is reduced little, and the high-purity alkali metal elements meeting the vacuum filling of the atomic clock atomic gas chamber can be stably prepared.