77results about How to "Reduce expansion force" patented technology

A method and apparatus for expanding a tubular below a restriction in a wellbore. An expandable tubular may comprise a first end having a first wall thickness, a second end having a second wall thickness, and a middle section disposed between the first and second ends and having a third wall thickness that is less than the first and second wall thicknesses. The first and second ends may include one or more grooves disposed along a length of the ends. A method for expanding a tubular below a restriction in a wellbore may comprise running the tubular past the restriction, wherein the tubular comprises a first end and a second end, each end having a wall thickness greater than a wall thickness of a middle section disposed between the ends. The method may include expanding the tubular, wherein the first and second ends of the expanded tubular have outer diameters greater than the outer diameter of the middle section.

The invention discloses a method for modifying swelling soil through iron tailing fine sand and a construction method thereof. The method for modifying swelling soil through iron tailing fine sand comprises uniformly mixing iron tailing fine sand and swelling soil to be modified according to a formula to obtain mixed soil, determining the optimal moisture content of the mixed soil through a heavy compaction test, making the moisture content of the mixed soil be the optimum through humidifying or drying, and closing the mixed soil to obtain the iron tailing fine sand modified swelling soil. The method for modifying swelling soil through iron tailing fine sand can effectively raise the strength of the swelling soil, the problem that deformation of filling material of swelling soil may damage the swelling soil can be solved. The modified soil can used as filling material used in buildings, railways, roads, airports, water conservancy engineering and the like in swelling soil areas, so the method is significant in economic benefit and engineering construction.

The invention is of an improvement to orbital welding heads and welding systems for welding pipe and tubing butt joints, consisting of a novel combination of materials, including a ceramic weld insulator and a metal weld gear. Such a combination, which has a greater dielectric strength than a plastic housing design, results in a more concentric tungsten travel path, increases the duty cycles of the weld head, minimizes erratic and wandering arcing, creates an electrical insulation yielding minimal expansion, allows for increased clamping surface for improved tube alignment, and provides a compact and very robust weld head.

An osmotic pump controlled release tablet and the preparation method thereof are disclosed. The osmotic pump controlled release tablet is composed of tablet core, semipermeable membrane and optional film coating. The material of said semipermeable membrane is composed of ethyl cellulose and povidone in the ratio of 1:1˜1:4 by weight. Said tablet core comprises drug containing layer and push layer. The osmotic pump controlled release tablet also characterizes in that; (1) the angle θ₁ formed by the outer curved surface of the drug containing layer and the lateral surface is 120°-180°; and/or (2) the ratio of L₁ to r is 0.27-1.0, wherein L₁ is the vertical distance from the central vertex of the outer curved surface of the drug containing layer to the plane formed by the intersection line between the outer curved surface of the drug containing layer and the lateral surface, and r is the radius of the tablet core.

The invention discloses a processing method used for preventing whole-flour cell wall breaking of sweet potato grains, which is characterized in that sweet potato whole-flour is produced according to a backfilling method process flow, namely, the sweet potato raw material is cleaned with the mud, sand and skin removed, sliced, colour-protected, cured, cooled, backfilled to prepare the mashed potatoes, regulated, dried and grinded and screened so as to obtain the finished product; after the colour protecting step, the measures such as pre-heating, calcium dipping, braising and emulsifier adding are taken so as to reduce the wall breaking of the sweet potato cells and lead the free starch rate to be reduced to about 6%; the product has good visco-elasticity, balanced rehydration and good colour, remains the original matters such as nutrition, fragrance, and the like, to the utmost extent and approaches the mashed potatoes prepared by the fresh potatoes.

A compliant middle member to be used between encapsulated stacked circuit boards contained in an enclosure. The compliant middle member absorbing expansion forces from an encapsulant experiencing thermal expansion, thereby diverting and reducing the expansion forces exerted upon the electrical components.

The invention discloses an assembled type anchor rod frame beam structure containing an elastic cushion layer and suitable for an expansive soil slope and a construction method thereof. The construction efficiency and quality of an anchor rod frame beam are effectively improved, the material cost of the frame beam is saved, and the comprehensive supporting effect of the anchor rod frame beam structure is improved. The structure comprises a reinforced concrete concave beam prefabricating unit, EPS (polystyrene) elastic cushion layers arranged on two sides of the reinforced concrete concave beamprefabricating unit, and an anchor rod arranged at a joint of a reinforced concrete frame beam. The reinforced concrete frame beam is formed by connecting the reinforced concrete concave beam prefabricated unit, cast-in-place concrete at the joint and bolts. The EPS elastic cushion layers are arranged on two sides of the frame beam. According to the assembled type anchor rod frame beam structure,the construction efficiency and quality of slope supporting engineering are effectively improved, the material cost of the frame beam is reduced, and the supporting effect of the anchor rod frame beam structure and the economic benefit of the construction project are improved.

The invention provides a temperature control assembly and a battery pack. The temperature control assembly comprises a first side plate, a second side plate and a first buffer plate. The first bufferplate is arranged between the second side plate and the first side plate so as to divide a cavity into a plurality of channels, and at least a part of the first buffer plate obliquely extends from thefirst side plate to the second side plate. When external air flows through a channel of the temperature control assembly, heat dissipation treatment of the battery can be realized. In a use process of the battery pack, an expansion force of two adjacent batteries extrudes the first side plate and the second side plate respectively, and at least a part of the first buffer plate obliquely extends so that the expansion force transmitted to the first buffer plate is greatly reduced, and the service life of the temperature control assembly is prolonged. Moreover, at least a part of the first buffer plate obliquely extending is easier to bend and deform under the action of expansion force so that the temperature control assembly can timely absorb the expansion force of the battery, and the service life of the battery is prolonged.

The invention relates to a method of closing a diesel engine (100) possessing at least two cylinders (110, 120, 130, 140). According to the disconnecting requirement, during the process from the inertia operation to the stop of the diesel engine (100), intake valves (111, 112, 113, 114) and/or vent valves (112, 122, 132, 142) of at least a first cylinder (130) and a second cylinder (110) are triggered, so the cylinder inflation level of the first cylinder (130) is higher than the cylinder inflation level of the second cylinder (110) at the stop moment. The first cylinder (130) is in the compression stroke and the second cylinder (110) is in the power stroke at the stop moment.

The invention relates to the field of clothes dryers, in particular to a rapid drying device and a control method. The rapid drying device comprises a pedestal, an air bag arranged on the pedestal andused for sleeving clothes, and a drying device sending drying air into the air bag. The air bag has a limiting structure which can prevent clothes from sliding after the air bag is inflated. Throughstructural design, clothes are not liable to slide relative to the air bag after the air bag swells, so that the problem that the clothes drying speed is influenced by clothes piling is solved and folds of clothes caused by sliding and piling can be prevented.

The invention provides an expansive soil foundation structure containing a ballastless track roadbed and a construction method. The structure comprises porous pipe piles, an expansive soil foundation,a geosynthetics reinforced cushion layer and a ballastless track roadbed, the porous pipe piles and the expansive soil foundation are arranged at the lowermost portion, and the geosynthetics reinforced cushion layer and the ballastless track roadbed are sequentially arranged above the porous pipe piles and the expansive soil foundation from bottom to top; a plurality of porous pipe piles are vertically arranged in the expansive soil foundation, each porous pipe pile comprises a hollow porous pile body and an elastomer material filling the hollow porous pile body, each hollow porous pile bodyis of a hollow reinforced concrete structure, and each porous pipe pile further comprises a radial through hole penetrating through the inner wall and the outer wall of the corresponding hollow porouspile body in the radial direction. According to the method, the expansion and shrinkage deformation of the expansive soil foundation during water immersion and loss is effectively reduced, so that the expansion and shrinkage deformation of the ballastless track roadbed is controlled within a reasonable range, the requirements of high-speed and safe operation of trains on the ballastless track roadbed are met, and the expenses for reinforcing and treating the expansive soil foundation are saved.

The invention provides a battery and a preparation method thereof. The battery comprises a battery cell and an electrolyte, and the battery cell comprises a positive pole piece, a negative pole pieceand an isolating membrane. In the battery, salient points are arranged on the surface of a positive electrode diaphragm and/or a negative electrode diaphragm, wherein the heights of the salient pointsarranged on the surface of the positive electrode diaphragm are Tc, the heights of the salient points arranged on the surface of the negative electrode diaphragm are Ta, the thickness increase amountof the positive electrode diaphragm when the state of charge of the battery is 100% SOC is Hc, the thickness increase amount of the negative electrode diaphragm when the state of charge of the battery is 100% SOC is Ha, and 0.3<=(Tc+Ta)/(Hc+Ha)<=1. According to the invention, the expansion force of the battery in the whole life cycle can be effectively reduced, so that the battery has the characteristics of the high safety and the long cycle life.

The invention provides a novel aluminum alloy-concrete combined beam, and relates to a beam. The existing steel-concrete beam consists of an I-shaped beam or a box-shaped beam, an anti-shearing connecting element and a concrete slab cast on the top of the steel beam, and cannot simultaneously realize the anti-shearing force and the durability. The novel aluminum alloy-concrete combined beam comprises an aluminum alloy sectional material with a cavity, wherein the aluminum alloy sectional material is in a T shape or in a shape like a Chinese character 'ri', and is divided into an upper part and a lower part; the upper part is wider than the lower part; the upper part of the aluminum alloy sectional material is provided with a plurality of cavities; and the cavities of the upper part of the aluminum alloy sectional material are filled with concrete. The technical scheme has the advantages that the pressure-resistant capability of the concrete and good ductibility of the aluminum alloy sectional material are sufficiently realized; the strength and the force bearing capability of the beam are effectively improved; the problems that the combined beam has many welding processes, and the concrete slab can easily crack are solved; and good durability, economic performance and durability are realized.

The invention relates to an electrospun nanofibrous membrane of controlled-release growth factors and an esophageal membrane-coated memory stent. The electrospun nanofibrous membrane of controlled-release growth factors is characterized in that the housing solution is a poly (caprolactone lactate) copolymer solution with hexafluoroisopropanol as a solvent; the core solution is an aqueous solutionof EGF protein, and is prepared by a coaxial co-spinning method. The esophageal membrane-coated memory stent comprises a first fixed end, a second fixed end and an outer diameter of 40-50 mm stent body, a second fixing end and an entire outer wall of the stent body coated with the controlled-release growth factor electrospun nanofiber membrane, and the first fixing end is composed of a plurality of membrane sheets with tension. The invention provides a novel method for treating esophageal injury without stenosis or obstruction. The esophageal membrane-coated memory stent can be used for esophageal injury without stenosis or obstruction and is not easy to dislocate. The electrospun nanofiber membrane loaded by the memory stent has excellent sustained release effect and good protein activity, and can remarkably promote the repair of esophageal injury.

The invention discloses a safety endovascular intervention treatment puncture channel expansion device. The safety endovascular intervention treatment puncture channel expansion device comprises rectangular frames, wherein rectangular air bags are fixedly connected to the bottoms of the rectangular frames; air boxes are fixedly connected to the opposite sides of the two rectangular frames; communicating pipes are fixedly connected to the opposite sides of the two air boxes; air pushing plates are slidably connected into the corresponding air boxes; a linkage rod is rotationally connected to the top of a deflection rod; a wind box is fixedly connected to the end, away from an air spring, of a ventilation pipe; an air blocking plate is arranged at the bottom of the ventilation pipe in a penetrating mode; an air leakage rod is arranged at the bottom of the ventilation pipe and located on the right side of the air blocking plate in a penetrating mode; a magnetic block is arranged below a force measuring rod; and a pressure rod is glidingly connected to the bottom of the magnetic block. According to the safety endovascular intervention treatment puncture channel expansion device, the air spring and the force measuring rod are used in cooperation, and therefore the effects of automatically adjusting the expansion force and preventing vascular injury during vasoconstriction are achieved.

The invention relates to the technical field of building material installation, in particular to a novel polystyrene foam flow guide pipe assembly. The novel polystyrene foam flow guide pipe assemblycomprises a flow guide pipe, an adapter and a glue spraying pipe; one end of the flow guide pipe is connected with one end of the adapter; the other end of the adapter is connected with the glue spraying pipe; the glue spraying pipe comprises a first pipe fitting, a second pipe fitting and a third pipe fitting; the diameter of the first pipe fitting is greater than that of the second pipe fitting;and the diameter of the second pipe fitting is larger than that of the third pipe fitting, one end of the second pipe fitting is connected with the first pipe fitting, and the other end of the secondpipe fitting is connected with the third pipe fitting. The novel polystyrene foam flow guide pipe assembly is long in range, easy to operate and low in production cost.

A method of treatment of nasal conditions comprising: delivering an expandable structure in a crimped configuration to a nasal lumen; expanding the expandable structure within the nasal lumen to a stable expanded configuration; removing the structure from the nasal lumen, after a time period, where removing comprises causing the structure to self-crimp. The expandable structure optionally comprises: a first shape memory (SM) portion which is in a strain-induced state; and a second portion which resists expansion of said structure due to said first portion, over a plurality of different expansion states of said first portion. Optionally, the properties of the second portion vary over its cross section. For example an outer surface and/or peripheral layer may have desirable environmental resistance properties and/or a frame may have desirable mechanical properties, for example a high creep resistance.