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326results about How to "Prevent suction" patented technology

Double-channel variable geometry rocket base combined cycle engine

The invention discloses a dual-channel variable-geometry rocket-based combined cycle engine, which adopts a dual-channel structure and realizes good work in a wide flight range through a partitioned combustion mode; the dual channels work simultaneously in a low-speed flight state to complete ejection mode and sub-stage The work in the low-speed section of the combustion mode; in the high-speed flight state, it is converted to the high-speed channel to work alone, and completes the work of the high-speed section of the sub-combustion mode and the super-combustion mode. The variable geometry method that the top pressure plate rotates around the rotating shaft is used to realize the adjustment of the small shrinkage ratio in the low-speed flight state and the large shrinkage ratio in the high-speed flight state, and meet the air capture and airflow compression requirements under different flight Mach numbers in a wide range of the engine. The binary mixed pressure inlet is adopted, the top pressure plate and the side plate of the inlet have good adhesion, and the mechanical dynamic seal is easy to realize, which is suitable for engineering applications; it meets the power requirements of different working modes of the aircraft. The top pressure plate and the conversion plate are respectively connected to the rotating shaft of the double fulcrum structure, the structure is rigid, and the high temperature sealing is easy to realize.
Owner:NORTHWESTERN POLYTECHNICAL UNIV

Method for producing circuit board thin plates

The invention discloses a method for producing circuit board thin plates. The technical scheme is characterized in that the method comprises the following steps that: conducting plating though holes; conducting outer layer circuit pattern transfer; conducting graph electric plating and etching; penetrating a string through locating holes of the circuit board thin plates, utilizing string beads to separate the circuit board thin plates, and plating the circuit board thin plates though the holes, after plating the circuit board thin plates through the holes, washing liquid medicine on the surfaces of the circuit board thin plates away by horizontally drawing the circuit board thin plates through a thick plate; conducting electric test; conducting routing; utilizing a plastic package tray to package a finished-product unit plate subjected to routing. From the procedure of layer circuit pattern transferring to the procedure of routing, the circuit board thin plates are compressed through pressing grooves by the adoption of a pig cage frame device to be transferred between the procedures. The method for producing the circuit board thin plate solves the problems that the circuit board thin plates are prone to plate adhesion, plate curving, plate clamping and plate fracture due to the fact that the circuit board thin plates are small in size. The method for producing circuit board thin plates is simple in process and stable in product quality.
Owner:广东依顿电子科技股份有限公司

Layering continuous well testing system and use method thereof

The invention provides a layering continuous well testing system and a use method thereof. The layering continuous well testing systems which are placed in a casing at interval comprise drainage test assemblies, straddle assemblies, and perforation assemblies connected from top to bottom. The cut-through cavity of the drainage test assemblies is communicated with the cut-through cavity of the straddle assemblies, to form a production channel. The straddle assemblies comprise a pressure transmitting joint, an upper packer, an upper pilot-controlled sieve tube, a lower packer, and a lower pilot-controlled sieve tube. In the production channel, pressure transmitting pipes which extend from the pressure transmitting joint and are communicated with an ignition head are arranged at interval. The pressure transmitting hole on the pressure transmitting joint is communicated with the upper port of the pressure transmitting pipe, to form a pressurization channel. The upper pilot-controlled sieve tube is provided with a first diversion channel which is separated from the production channel. The pressurization channel is injected with fluid, so the first diversion channel is communicated with the production channel. The lower pilot-controlled sieve tube is provided with a second diversion channel which can be connected with the production channel. Fluid is injected to make the second diversion channel separated from the production channel. The system can perform well testing on an upper layer and a lower layer.
Owner:PETROCHINA CO LTD

Ladle breathable upper nozzle seat brick and method for controlling nozzle slag entrainment

ActiveCN104028739BImprove cleanlinessReduce the amount of molten steelMelt-holding vesselsBrickSlag
The invention relates to a ladle ventilating upper nozzle seat brick and a method for controlling nozzle slag volume, which comprises a ladle upper nozzle seat brick body, a ventilating ceramic rod and an air chamber box, the air chamber box is located at the bottom of the ventilating ceramic rod and connected with the ventilating ceramic rod Connected, there are a plurality of breathable ceramic rods, which are evenly arranged in the body of the upper nozzle block in a ring around the flow steel hole. The top of each breathable ceramic rod protrudes from the upper surface of the upper nozzle block body. A plurality of slots for fixing the air-permeable ceramic rods are provided, and the bottom end of each air-permeable ceramic rod extends into the slot of the air intake chamber box. When the molten steel in the ladle is at a low level, argon gas is blown in from the inlet pipe to form a ring-shaped air curtain barrier around the upper nozzle of the ladle to wash the molten steel that is about to enter the upper nozzle. The problem of eddy current slag entrainment at the nozzle not only improves the cleanliness of molten steel, but also reduces the amount of molten steel in the ladle injection surplus, a year-on-year decrease of more than 30%.
Owner:LAIWU STEEL YINSHAN SECTION CO LTD

Cleaning flexible shaft and pipeline cleaning system and method

The invention discloses a cleaning flexible shaft and a pipeline cleaning system and method. The cleaning flexible shaft comprises a flexible shaft core, a shaft core sleeve, a ventilating pipe, a dust collection end piece and a connecting piece. The shaft core sleeve is arranged on the flexible shaft core in a sleeving mode. The ventilating pipe is arranged on the shaft core sleeve in a sleeving mode, and the ventilating pipe and the shaft core sleeve form a ventilating channel. The two ends of the ventilating pipe are connected with the dust collection end piece and the connecting piece correspondingly. The dust collection end piece is provided with a first ventilating hole. A second ventilating hole is formed in a supporting plate which is arranged between the connecting piece and the shaft core sleeve. The first ventilating hole, the ventilating channel and the second ventilating hole communicate with one another. The pipeline cleaning system comprises a base body, walking mechanisms, a control terminal and the cleaning flexible shaft. The walking mechanisms are arranged on the two sides of the base body. The cleaning flexible shaft is arranged on the base body. The control terminal is provided with a flexible shaft connecting part. The back end of the cleaning flexible shaft is connected with the flexible shaft connecting part. The cleaning flexible shaft and the pipeline cleaning system can be used for pipeline cleaning and also can collect dust during pipeline cleaning, using is convenient, and the pipeline cleaning efficiency can be improved.
Owner:广东齐创科技投资集团有限公司

Electronic atomization cigarette cartridge

The invention discloses an electronic atomization cigarette cartridge. The electronic atomization cigarette cartridge comprises a sleeve pipe, an air pipe, a heating component, a suction nozzle, a sealing sleeve and a heating bracket, wherein the upper end of the sleeve pipe is in sealed connection with the suction nozzle; the lower end of the sleeve pipe is in sealed connection with the heating bracket; an air outlet hole and tar inlet holes are formed in the sealing sleeve and longitudinally pass through the sealing sleeve; the tar inlet holes are arranged around the air outlet hole; the sealing sleeve is arranged on the upper surface of the heating bracket and is used for forming a receiving groove with the upper surface of the heating bracket; the heating component is arranged in the receiving groove; a ratio of the sectional area of the heating component to the sectional area of the receiving groove is 30%-50%; the air pipe is arranged in the sleeve pipe; a cigarette tar cavity isformed between the air pipe and the sleeve pipe; the upper end of the air pipe is connected with the suction nozzle; the lower end of the air pipe is communicated with the air outlet hole; the cigarette tar in the cigarette tar cavity enters the heating component through the tar inlet holes. The electronic atomization cigarette cartridge has the advantages that the cigarette tar in a tar storagebin can penetrate into the heating component, the situation that the excess cigarette tar in the tar storage bin enters the receiving groove can also be avoided, and the electronic atomization cigarette cartridge is capable of effectively preventing the cigarette tar from being leaked externally and sucked into the mouth.
Owner:SHENZHEN HANGSEN STAR TECH

Concentration apparatus for wet method phosphoric acid refinement

The invention relates to a concentration apparatus for wet method phosphoric acid refinement. The concentration apparatus comprises a flash evaporation chamber, a forced circulation pump, a heater, a concentration material liquid outlet pipe, a concentration material fluid inner pipe, a foam removing pipe, a cyclone separator and a steam pipe. A secondary steam outlet and a lower circulation pipeare respectively arranged on the upper end and the lower end of the flash evaporation chamber. An upper circulation pipe and the concentration material liquid outlet pipe are respectively arranged onthe left side and the right side of the flash evaporation chamber. The height of the inner pipe opening on the concentration material fluid inner pipe is less than the height of the pipe opening of the upper circulation pipe. One end of an atmospheric pressure synchronization pipe is communicated with the concentration material liquid outlet pipe, and the other end of the atmospheric pressure synchronization pipe is communicated with the flash evaporation chamber or atmosphere. The foam removing pipe is connected with the secondary steam outlet. The other end of the secondary steam outlet is connected with the cyclone separator. The other end of the cyclone separator is connected with a condensate groove by a condenser. The steam pipe is arranged on a position close to the bottom of the flash evaporation chamber. With the design of the present invention, the flash evaporation effect is achieved, the siphon is prevented, it is ensured that the tiny droplet of the material liquid does not easily escape along with the secondary steam, such that the requirement of steam stripping defluoridation or steam stripping extractant recovery can be met so as to form a continuous production.
Owner:吴杰

Automatic balance pressure expansion and fishing integrated expansion pipe tool and its use method

The invention discloses an automatic pressure-balancing expansion-catch integrated expandable tube tool and a use method thereof. The automatic pressure-balancing expansion-catch integrated expandable tube tool comprises an expandable tube and a bottom plug arranged on the bottom of the expandable tube, a slidable pull rod which runs through the expandable tube and the bottom plug is arranged in the expandable tube, the lower end of the bottom plug is connected with an oil drain device which comprises an oil drain device shell sleeved on the outside of the pull rod, the gap between the oil drain device shell and the pull rod is formed into an annular space, a sliding sleeve which can slide in the annular space is arranged in the annular space, a back nut which is radially raised outwards is fixed on the bottom of the pull rod, the oil drain device shell is radially provided with an oil drain outlet, the sliding sleeve is radially provided with an aligning slotted hole, and the back nut can abut against and drive the sliding sleeve to slide in the annular space, so that the aligning slotted hole can be aligned and communicate with the oil drain outlet. The invention has the advantages that: the occurrence of the pumping phenomenon in the process of catch is prevented, the difficulty of bottom plug catch is decreased, and the safety and reliability of on-site operation in oil fields are enhanced.
Owner:PETROCHINA CO LTD

Anti-leakage lubricating oil supply system of power device

PendingCN108036184APrevent leakageLeakage worksLubricant storageTurbinesPower equipmentLubrication
The invention discloses an anti-leakage lubricating oil supply system of a power device, and belongs to the technical field of mechanical and power equipment lubrication supply. The lubricating oil supply system comprises an oil supply pump oil inlet pipe, an oil supply pump, an oil supply pressure meter, an oil supply pump oil outlet pipe, an oil supply filter, lubricating oil, an oil storage tank, an equipment oil return pipe, an oil storage tank pressure meter, a vacuum pump air inlet pipe, a vacuum pump air inlet filter, a vacuum pump and a vacuum pump exhaust pipe. According to the system, the lubricating system conducts lubrication in the running manner of the negative pressure lower than the environment pressure, an inlet and an outlet of a lubricating oil pump are in negative pressure; during work, the lubricating oil pump conveys the lubricating oil to the lubricating part; through control the pressure of the vacuum pump and the oil pump, it is guaranteed that the pressure atthe lubricating part is lower than the outer pressure of the lubricating system, a small amount of gas flows into a sealing cavity from the exterior of the lubricating system, the lubricating oil is driven to flow in the equipment oil return pipe direction, and accordingly the purpose that lubricating oil is prevented from leaking outwards from a gap is achieved. The system is applicable to gas turbines or other high-speed rotation power machines.
Owner:HARBIN ENG UNIV

Shear pin type bypass valve

The invention discloses a shear pin type bypass valve which comprises an upper connector, a spline mandrel and a lower connector. The upper end of the spline mandrel is sleeved with the upper connector through a screw. The outer side of the spline mandrel is provided with a segment of spline mandrel outer cylinder. A certain distance exists between the upper end of the spline mandrel outer cylinder and the bottom end of the upper connector. The lower end of the spline mandrel outer cylinder is screwed on the outer side of the lower connector through a screw. The spline mandrel outer cylinder is provided with a threaded hole. The outer wall of the corresponding spline mandrel is provided with a mounting groove. The spline mandrel outer cylinder is fixed to the spline mandrel by screwing in shear pins. The side wall, located below the bottom end of the spline mandrel, of the lower connector is provided with bypass holes, so that an inner flow channel of the spline mandrel is communicated with outer bypass annular holes. The outer side of the lower portion of the upper connector is sleeved with a pressing fixing sleeve through screw threads. The outer side of the upper portion of the spline mandrel outer cylinder is provided with an outer screw thread matched with an inner screw thread of the pressing fixing sleeve. The shear pin type bypass valve is simple in structure, the ground pressure test is implemented easily, and the shear pins replace other bypass valves to press downwards and close the bypass valves in a delayed mode.
Owner:BC P INC CHINA NAT PETROLEUM CORP +1

Oblique-drum vacuum solid fermentation tank internally provided with heat-exchange helical blade

The invention discloses an oblique-drum vacuum solid fermentation tank internally provided with a heat-exchange helical blade. The oblique-drum vacuum solid fermentation tank internally provided withthe heat-exchange helical blade comprises a tank body and a base, wherein a hollow stirrer used for stirring and mixing is arranged on the inner wall of the tank body, and a bearing rail and a drivengear which surrounds the tank body are arranged at the front end of the tank body; a hollow radical shaft is arranged at the bottom end of the tank body, and a bearing is arranged outside the hollow radical shaft; a vacuumizing rotating connector is arranged at the top end of the tank body, and the vacuumizing rotating connector is communicated with a vacuum pump; a first supporting base, a secondsupporting base and a motor installation base are arranged on the base, a bearing wheel matched with the bearing rail is arranged on the first supporting base, the second supporting base is movably connected with the bearing, a heat-exchange medium rotating connector is arranged at the tail end of the bearing, a driving motor is arranged on the motor installation base, and a driving gear matchedwith the driven gear is arranged on the driving motor. The oblique-drum vacuum solid fermentation tank internally provided with the heat-exchange helical blade has internal and external double heating / cooling, double stirring and back mixing functions, capable of completing vacuum drying at the same time, and is suitable for multi-purpose non-in-place sterile solid fermentation production.
Owner:沈阳升顺机械设备有限公司

Multi-layer water seal device and method

The invention discloses a multi-layer water seal device. The multi-layer water seal device comprises two or more water seals which are sequentially arranged from top to bottom, wherein the upper water seal is of a floating bell jar type structure comprising a water seal box and a floating jar bell arranged in the water seal box; the lower water seal is arranged in a drain pipe below the floating bell jar; one side of the water seal box extends or is connected with a communication cavity chamber deviated from the drain pipe, the floating bell jar also correspondingly extends or is connected with the floating component, and the floating component is deviated from the drain pipe and floats in the communication cavity room. When sewage in the water seal box rapidly flows away through the drain pipe, floating force on the floating component from the communication cavity chamber is greater than that on the floating bell jar from the water seal box, and the larger the distance between the water seal box and the drain pipe is, the larger floating force larger. Thus, the floating bell jar is inclined towards the outer side of the water seal box because of unbalance of the floating force, it is avoided that the floating bell jar is adsorbed to the bottom wall of the water seal box under the action of the negative pressure of the drain pipe, and work stability of the water seal device is improved. The invention further discloses a multi-layer water seal method.
Owner:BEIJING KANGZHIWEI SCI & TECH
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