119 results about "Pre expansion" patented technology

The invention discloses a compressed air energy storage system, which comprises a compressor unit, a pre-expansion device, a turbine expansion machine, an intermediate cooler, an electric motor, a power generator, a hot water storage tank and a cold water storage tank, wherein the system utilizes electric energy which is not used up in the user electricity consumption valley period or wind power station power generation peak period for driving the compressor unit to work, the air at the normal pressure is compressed to high pressure, in addition, the part of air with rich pressure energy is stored into a high-pressure-resistance hole, in addition, the stored high-pressure air is released in the user electric consumption peak period or the wind power field generation valley period, an expansion unit is pushed to apply work, and the electric energy is output. The air pre-expansion device is additionally arranged at an outlet of an air storage chamber, so the air inlet pressure of the air turbine expansion machine is stable, the work stability of a power generation system is enhanced, low-temperature air at an outlet of the pre-expansion device is utilized for cooling hot water from the hot water storage tank, the temperature of the low-temperature air is raised through absorption of heat from the hot water, and the cooled water enters the cold water storage tank. The compressed air energy storage system is provided with the hot water storage tank and the cold water storage tank, the water is cyclically utilized in a closed loop, the water is not consumed, in addition, the heat discharged by the compressor is fully utilized and conveyed back to the high-pressure air at the outlet of the pre-expansion device. The high-pressure air at the outlet of the pre-expansion device is recovered through a heat recovering device (HRH).

A method of forming a composition of expanded polylactic acid (PLA) resin beads comprising impregnating PLA resin beads with CO₂ and holding the impregnated beads at a temperature and pressure that prevents the beads from foaming while allowing the level of impregnated CO₂ to reduce. The method may comprise pre-expanding the beads at a pre-expansion temperature. Promptly following pre-expansion or after a desired storage period, the method may comprise introducing the pre-expanded beads into a mould and further expanding and fusing the beads in the mould by application of a temperature greater than the temperature used for pre-expansion. Preferred moulded products include moulded blocks and shaped moulded products, especially blocks adapted to form packing material. Other preferred moulded products include convenience items such as containers including clamshell containers, pots, boxes, bowls, cups, plates and trays.

The invention provides a postgreSQL database mass data management method and system. The method is implemented based on a Linux platform and includes the steps that mass storage management configuration initialization is performed, and system timing scheduling is started; stale data partitions beyond a reserved time quantum are deleted, and then partition data, within a reserved time quantum and beyond an actual storage cycle, in non-stale data partitions is cleared away; storage space checking is performed, whether a storage space supports pre-expansion or not is judged, if yes, partition pre-expansion operation and index establishment are performed, and otherwise, an adaptive simplification mechanism is triggered. According to the postgreSQL database mass data management method and system, the validity, availability and expandability of data are guaranteed, a numerical basis is provided for data expansion, the maintenance efficiency of database administrators is effectively improved, the database management and maintenance cost is greatly reduced, and the postgreSQL database mass data management method and system have significant market value.

The invention discloses an expansion tube assembly, an oil well subsidy construction mechanism with the expansion tube assembly, and an oil well subsidy construction method. The disclosed expansion tube assembly comprises an expansion tube, an expansion cone, a central rod and a power cylinder, wherein the expansion cone is installed on the central rod; the power cylinder comprises a cylinder barrel and a piston; the piston rod of the piston can be respectively in sliding fit with the upper end part and the lower end part of the cylinder barrel; the piston body of the piston is installed on the piston rod and is matched with the inner wall surface of the cylinder barrel; a first pressure chamber and a second pressure chamber are formed in the cylinder barrel; the central rod is connected with the lower end of the piston rod; the expansion tube is sleeved outside the central rod and is positioned between the cylinder barrel and the expansion cone; the piston is provided with a pressurization channel; and the cylinder barrel is provided with a pressure relief vent. Compared with the existing expansion tube assembly, the expansion tube assembly disclosed by the invention does not have a pre-expansion part bearing high pressure, so that the expansion tube can have smaller thickness, the maximum diameter of the expansion cone is increased, the subsidy position has a larger drift diameter, and the influence of subsidy construction on an oil well is reduced.

The invention relates to a control method for stable coiling of the head of hot-rolled high-strength steel. The method includes the following steps that head drying is performed on the strip steel in the laminar cooling process; a control system sets steel head tracking distance values; the control system sets the first waiting position of a first assistant coiling roll and the second waiting position of a second assistant coiling roll; the first assistant coiling roll, the second assistant coiling roll and a third assistant coiling roll conduct stepping according to the steel head tracking distance values; and in the pre-expansion process of a central spindle, the control system controls the central spindle to expand to a pre-expansion diameter value ranging from 745 mm to 750 mm from an initial diameter value. By means of the control method, it can be guaranteed that the head of the high-strength steel enters a coiling machine stably and smoothly, the situation that the head is abutted or rubs against relevant equipment, and consequently the steel strip halts is avoided, and therefore the steel heaping accident is avoided.

The invention discloses a medicine-coated balloon catheter comprising a push catheter, at least one expandable first balloon at a distal end of the push catheter, and a pre-expansion mechanism. At least a portion of the surface of the first balloon is covered with a drug coating. The pre-expansion mechanism comprises an expandable first expansion sleeve that is movably sleeved outside the first balloon, and a first expansion sleeve connector that is coupled to the proximal end of the first expansion sleeve. The first expansion sleeve connector is sleeved outside the push catheter and moves relative to the push catheter in the axial direction. The medicine-coated balloon catheter of the invention can not only effectively pre-expand the diseased part, but also effectively avoid the loss of the medicine-coated balloon in the conveying process, and the operation process is simple, the operation time is short, and the cost is low.

The invention relates to a control method for preventing telescopic discharged hot-rolled pipeline steel coils. The control method comprises the following steps: operating a coiling production line, conveying band steel to a pinch roll and a pinch roll along a roller way, and further conveying to a coiling machine; driving a mandrel to carry out pre-expansion process by a hydraulic driving device before the band steel is conveyed to the position of the mandrel; winding 1.5 circles of band steel on the mandrel to form a steel coil and driving the mandrel to carry out expansion process by the hydraulic driving device; driving a coil discharging trolley to ascend until a carrier roller is contacted with the steel coil by a hydraulic system after the expansion process is finished, so as to carry out coil discharging process; driving the mandrel to perform contraction process by the hydraulic driving device after the carrier roller is contacted with the steel coil; and discharging the steel coil from the mandrel by the coil discharging trolley when the diameter of the mandrel is contracted to be minimum. The control method can ensure that the expanded diameter of the mandrel is reasonable, the coil contact height of the coil discharging trolley is appropriate, the telescopic discharging coil caused by rubbing of the mandrel and the inner wall of the steel coil is thoroughly reduced, the coil discharging operation is enabled to be carried out smoothly and the stable batch pipeline steel production is realized.

The invention provides a novel self-expansion screen pipe, comprising a shape memory alloy slotted base pipe, a metal screen pipe, a water-soluble filler layer, a shape memory polymer layer and a water-soluble protective layer sequentially from inside to outside. The shape memory alloy slotted base pipe is made of shape memory alloy, contracts to a pre-expansion shape at high temperature and self-expands under temperature effect after being tripped in to a specified position; the shape memory polymer layer contracts to a pre-expansion state at high temperature and never changes in shape at normal temperature. Compared with the prior art, the novel self-expansion screen pipe has the advantages that the diameter is increased through the expansion pipe technology; multiple producing layers can be subjected to sand prevention treatment at a time; gravel filling is not required so that the influence of insufficient filling on sand prevention effect is avoided; fewer string trips-in are required so that operation cost is reduced; double filtration with the screen pipe and the shape memory polymer layer is achieved, improving the sand prevention effect; a well wall can be effectively supported so that wall collapse due to sand discharge is prevented.

The invention relates to an assembly including a pressurized gas storage tank and a control device for filling the tank with gas and/or extracting gas therefrom. The aforementioned tank includes: a hole which communicates with the interior of the tank, a filling and distribution head which is disposed at the hole and which includes a pre-expansion device which is at least partially integrated inside the volume of the tank, and a connection interface which is removably engaged with the gas supply and/or extraction control device such as to co-operate therewith. The invention is characterized in that the head includes an isolation member, such as a valve, which is housed at least partially inside the volume of the head and which can be accessed by an opening member that is external to the head through an access hole that is provided in the head. The above-mentioned control device includes a body having a connection end which is intended to be removably engaged with the connection interface, an opening member which can move in relation to the body and an actuation element which can move the opening member selectively between a retracted rest position and an operating position in which one end of the opening member projects out from the body beyond the connection end, such that the opening member can extend into the access hole in the head in order to open the isolation member.

The invention relates to a preparation method of a high-strength graphene expandable polystyrene board. The prepared product has the mechanical strength higher than that of other existing expendable polystyrene boards. The method comprises the several steps as follows: preparing a modified graphene pre-dispersion liquid; adding an oily dispersant to prepare an oily mixed liquid; preparing graphene polystyrene particles through suspension polymerization in a reaction kettle; finally, measuring mechanical properties after molding with pre-expansion, curing and board making processes. The prepared graphene expandable polystyrene board has excellent mechanical properties, has the tensile strength 400% higher than the national standard and has the compressive strength 200% higher than the national standard. With the adoption of the method, the application of expandable polystyrene in the packaging industry is expanded, expandable polystyrene is suitable for packaging industries with higher mechanical properties, such as packaging of precise instruments, packaging of spaceflight navigation parts and the like, and the advantages of polystyrene as a packaging material are played.

The invention discloses a method for manufacturing a transistor by using silicon single crystal slices, which comprises the steps of: 1) selecting two light-doped polished silicon slices, wherein thefront surfaces thereof are the polished surfaces; 2) conducting N+ or P+ pre-expansion on each silicon slice and then arranging an oxide layer on the front surface of the pre-expanded polished siliconslice; 3) causing the front surfaces of the two polished silicon slices with the oxide layers to face to each other for bonding at room temperature, and putting the obtained bonded silicon slice group into a high-temperature furnace for high-temperature processing; 4) conducting mechanical grinding and polishing on the two surfaces of the obtained silicon slice group; 5) manufacturing a transistor chip on the two surfaces of the silicon slice group respectively; 6) putting the silicon slice group obtained in the Step 5) into an HF solution to separate the silicon slices; and 7) metallizing the surfaces of the silicon slices without the transistor chip, and then removing optical resist, scribing and packaging, thus obtaining the transistor. The method for manufacturing the transistor by using silicon single crystal slices can guarantee the performance of the transistor.

The invention provides a hydro-mechanical deep drawing forming method for a sheet metal component with uniform deformation. The method includes the following steps of (1), placing a sheet; (2), applying blank holder force; (3), conducting forward expansion forming; (4), setting the pressure of a liquid filling chamber; (5), conducting hydro-mechanical deep drawing forming; and (6), picking up a component. Hydro-mechanical deep drawing forming with component uniform deformation is achieved through the change of the pre-expansion direction of the sheet; and the method breaks through the limitation of the pre-expansion amount in reverse expansion hydro-mechanical deep drawing, and the deformation uniformity of the component can be greatly improved.

The invention relates to a five-in-one pre-expanding ecological pile treating foundation method suitable for foundation, foundation collapse, gold ore dressing and construction application of environment-friendly field. The method comprises: after the foundation is drilled with holes, filling the holes, injecting hammer blocks into the holes, carrying out five-in-one power consolidation of vertically and transversely pre-expanding, extruding, transmitting and propelling by super-pressure kinetic energy through impacting, smashing, extruding, pressing and chopping; then filling the holes repeatedly and carrying out forced ramming and piling consolidation of vertically and transversely pre-expanding, extruding, transmitting and propelling for the super-pressure kinetic energy hammer blocks through impacting, smashing, extruding, pressing and chopping; and finally manufacturing a deep foundation of a composite foundation of a pre-expanding ecological pile with high bearing capacity, a specific pile foundation and the pre-expanding ecological pile. The method is advanced, has low construction cost, effectively solves problems of various thick difficult foundations, can eliminate pollution of pollutant to environment, and make human live on the foundation of firmness, safety and free pollution.

The invention relates to a pre-expansion machine of foam, which is mainly used for producing plastic foam. The pre-expansion machine of the foam with a reasonable structural design and reliable performances is not existed at present. The pre-expansion machine of the foam comprises a machine frame, a material loading device, a barrel body, a material door device, a material level control device, a scraper device, a sewage discharge device, a stirring device, an electrical box, a steam pipeline and a compressed air pipeline; the barrel body and the electrical box are both arranged on the machine frame; the material loading device, the material door device and the material level control device are all arranged on the barrel body; the scraper device is arranged at the bottom of the stirring device; the stirring device is arranged in the barrel body; and the sewage discharge device, the steam pipeline and the compressed air pipeline are all connected with the barrel body. The invention is characterized in that the scraper device comprises a scraper base, a left long scraper, a right long scraper, a front short scraper and a back short scraper; and the left long scraper and the right long scraper are both fixedly arranged on the scraper base, and the front short scraper and the back short scraper are both fixedly arranged on the scraper base. As the pre-expansion machine of the foam has the reasonable structural design, the materials cannot be collected at the bottom of a barrel, and a material leakage phenomenon cannot be generated on a material door.

The invention relates to a modified graphite polystyrene board and a preparing method thereof. Raw materials comprise expandable polystyrene beads, expandable graphite, phenolic resin and a curing adhesive. The preparing method includes: subjecting the expandable polystyrene beads to pre-expansion and curing, mixing with the expandable graphite and a part of the curing adhesive, mixing with the phenolic resin and the rest of the curing adhesive, and moulding and cutting by a board machine. The modified graphite polystyrene board has advantages of high flame retardance, thermal insulation, no melt trickling, and no dripping.

The invention relates to a method for expanding tobacco shreds and equipment used in the method. The method is characterized by comprising the following steps: (1) dipping; (2) loosening; (3) storing; (4) secondary loosening; (5) quantitative feeding; (6) pre-expanding, purification and air extraction: the tobacco shreds dipped by an expanding medium are pre-expanded in air blowing equipment, and the tobacco shreds dipped by the expanding medium are delivered to the air blowing equipment which blows air to the shreds dipped by the expanding medium; and miscellaneous gas volatilizing at the pre-expansion of the tobacco shreds and CO2 are pumped off by an exhaust tube; (7) expanding: the pre-expanded tobacco shreds are quickly delivered to a sublimator by a feeding air lock and is mixed with hot air flow in the sublimator for continuous expansion; and (8) cooling and shaping. The method has the advantages of improving the toughness, the whole cut rate and long shred rate of the expanded tobacco shreds, reducing the breakage of the expanded tobacco shreds, eliminating the miscellaneous gas and lowering energy consumption in the production process.

The invention discloses an internal wear clearance measuring and calculating method of a winding drum of a winding machine. The method comprises the steps that the zero wear rigidity expanding diameter and the zero wear no-load expansion diameter of the winding drum of the winding machine under the condition without wear are obtained; after the winding drum is used for a preset time period, the measuring rigidity expansion diameter of the winding drum is obtained by limiting the actual rigidity expansion diameter of the winding drum; the winding drum expands to the pre-expansion position, so that the measuring no-load expansion diameter of the winding drum of the winding machine is detected and obtained; and according to the measuring rigidity expansion diameter, the measuring no-load expansion diameter, the zero wear rigidity expansion diameter and the zero wear no-load expansion diameter, the internal wear clearance total amount of the winding drum is obtained. According to the technical scheme, the internal wear clearance total amount of the winding drum is obtained, and therefore replacement of the winding drum can be carried out when the internal wear clearance total amount approximates the maximum allowance wear clearance, the technical problems that in the prior art, according to the steel coiling amount, the winding drum is replaced, and the maintaining cost is wasted are solved, and the technical effects of prolonging the replacement period of the winding drum and reducing the maintaining cost are achieved.

The invention relates to a construction method for eliminating concrete shrinkage cracks of a steel plate and concrete combined shear wall by preheating a steel plate, which comprises the following steps: step 1, laying a heat conduction coil on the steel plate of the shear wall before the steel plate and concrete combined shear wall of a building is constructed; step 2, after the on-site installation of the steel plate of the shear wall is completed, injecting a heat conduction medium with a preset temperature into the heat conduction coil by a heat conduction metal injection system, simultaneously observing the temperature variation of the steel plate of the shear wall by a temperature measurement system to ensure the steel plate of the shear wall to reach a set temperature and generate a certain pre-expansion, and then carrying out concrete pouring construction in the steel plate and concrete combined shear wall; and step 3, after concrete is finally set, according to the shrinkage of the concrete, regulating the temperature and the flow of the heat conduction medium injected into the heat conduction coil by the heat conduction medium injection system so as to control the temperature of the steel plate of the shear wall. According to the method, the temperature of the steel plate of the shear wall can be effectively controlled and the concrete shrinkage cracks caused by inconsistence of deformation of the steel plate of the shear wall and the concrete are avoided.

The invention discloses a flash tank which comprises an inlet, a first outlet, a second outlet and a pre-expansion element. Fluid flows into the flash tank from the inlet. The first outlet is located in the top of the flash tank. The second outlet is located in the bottom of the flash tank. The pre-expansion element is integrated in the inlet of the flash tank and is used for pre-expanding fluid flowing into the inlet of the flash tank. In the flash tank, the pre-expansion element used for pre-expanding a refrigerant flowing into the inlet of the flash tank is integrated in the inlet of the flash tank, and therefore an independent throttling valve does not need to be arranged in a fluid inlet pipeline connected with the inlet of the flash tank and the throttling valve does not need to be independently controlled; and thus, the structure of a refrigerating system and control over the refrigerating system are simplified, and the cost is reduced. In addition, the invention further discloses the refrigerating system comprising the above flash tank.