62results about How to "Extend evenly" patented technology

An extension and retraction arrangement for retaining a supported article, such as a monitor, in relation to a trolley structure that is retained for axial extension and retraction in relation to an elongate support arrangement. A support arm, which can be unitary, articulated, pivoting, or non-pivoting, can be coupled to the trolley structure. The trolley structure can have a centrally disposed alcove disposed inboard of first and second rail members of the elongate support arrangement. A subsurface enclosure can retain the rail members, and first and second doors can selectively close an aperture in a framework coupled adjacent to an end of the subsurface enclosure. Constant force springs can assist travel of the trolley structure and an arcuate braking member or compressing spring can provide a braking effect to the trolley structure

The invention provides an Nbc nanoparticle reinforced X80 plastic pipe steel plate and a production method of the Nbc nanoparticle reinforced X80 plastic pipe steel plate. The steel plate comprises, by weight percentage, 0.06%-0.12% of C, 0.10%-0.30% of Si, 0.60%-1.40% of Mn, 0.07%-0.15% of Nb, 0.001%-0.004% of N, 0.01%-0.04% of Ti, 0.025%-0.045% of Al, not larger than 0.010% of P, not larger than0.005% of S, not larger than 0.30% of Cu, not larger than 0.30% of Mo, 0.12%-0.30% of Cr, 0.12%-0.30% of Ni and the balance Fe and inevitable impurity elements. The production method comprises the steps of material preparation, converter or electric furnace smelting, secondary refining, casting, slab reheating, controlled rolling and controlled cooling. By the adoption of the produced steel plate, the safety of oil and gas transmission pipelines laid in geological complex areas is ensured, and the purposes of high-pressure transportation of natural gas and oil and the like are met.

The invention relates to a polyvinyl alcohol membrane for the polarizing film, which is used to solve the problem of high-performance PVA film. The composition and weight of shares of the polyvinyl alcohol membrane: 10-30 units of PVA polymer, 5-25 units of plasticizer, 1-5 units of surfactant, 50 - 200 units of solvent. The PVA membrane has a high strength, good extension, which can be widely applied to liquid crystal display (LCD).

The invention discloses strain design based pipe line steel X70 and its manufacturing method. the steel comprises the following ingredients of: by weight, 0.06-0.10% of C, 0.1-0.6% of Si, 1.0-2.5% of Mn, P being less than or equal to 0.015%, S being less than or equal to 0.003%, Cr being less than 0.1%, 0.05-0.35% of Mo, 0.01-0.15% of Nb, 0.005-0.03% of Ti, 0.01-0.06% of Al, one or two components selected from 0-0.5% of Cu and 0-0.5% of Ni, and the balance Fe and unavoidable microscale impurities. The manufacturing method is characterized in that slab heating temperature is 1050-1280 DEG C by a controlled rolling and controlled cooling method; the temperature for controlled rolling in a recrystallization zone is controlled within the range of 900-1250 DEG C; the temperature for controlled rolling in a non-recrystallization zone is controlled within the range of 700-950 DEG C; initial cooling temperature is 650-800 DEG C; finish cooling temperature is 100-500 DEG C; and cooling rate is 5-35 DEG C/s. According to the invention, elements of V, B and the like are not added, and the total amount of Mo, Cu, Cr and Ni is low. In addition, subsequent heat treatment is not required, the process is simple and requires low cost, and production efficiency is high.

Provided is a cable retraction unit assembly connected to a table for displaying a mobile device. The cable retraction unit assembly includes: a cable connected to a mobile device; a guide housing and a withdrawal unit respectively mounted to an upper portion and a lower portion of a table, with the cable penetrating through the guide housing and the withdrawal unit; and a guide unit rotatably provided within the guide housing, wherein the guide unit is configured to rotate in response to a rotating direction of the cable when the cable rotates, thereby being capable of preventing twisting or breaking of the cable.

A linear actuator comprises an outer tube, an intermediate tube and an inner tube, and the tubes are all polygonal in cross section and are mounted orderly. The outer tube is disposed at the bottom thereof with a push device having a screw and a nut that are screwed with each other. The nut is engaged in the intermediate tube and is linked to move axially by the screw. The intermediate tube can be movably equipped with a pulling member, and the pulling member can link the inner tube to synchronously move in the axial direction. By such arrangements, the linear actuator allows the respective tubes to extend and retract axially relative to one another while preventing them from moving relative to one another in radial direction, thus achieving the stable and smooth axial movement.

The invention discloses wear-resistant steel with good forming performance for a dumper carriage body. Weight percentages of chemical components of the wear-resistant steel are as follows, 0.16-0.22%of C; 0.15-0.35% of Si; 0.90-1.30% of Mn; less than or equal to 0.018% of P, less than or equal to 0.010% of S, 0.020-0.060% of Als; 0.020-0.060% of Nb; 0.012-0.028% of Ti, 0.30-0.70% of Cr, 0.10-0.20% of Mo, 0.0005-0.0018% of B, less than or equal to 0.0025% of O, less than or equal to 0.0050% of N, less than or equal to 1.8 ppm of H and the balance of Fe and inevitable impurities. In the production method, the controlled rolling process comprises the rough rolling process, and austenite recrystallization zone deformed austenite grain uniformity control is carried out in the rough rolling process, and the pass reduction rate is controlled to gradually increase. The wear-resistant steel is advantaged in that the microstructure of the base plate is mainly composed of fine lath martensite, martensite lath size and mechanical property through plate distribution are uniform, a steel plate uniformly extends in all directions during stretching, cutting and U-shaped bending, consistency of machining and forming is guaranteed, straightness of the steel plate ranges from 1 mm/2 m to 4 mm/2 m after the steel plate is cut into narrow strips, straightness of a bent end is not larger than 3 mmafter the steel plate is bent in a U shape, and good forming performance is achieved.

The invention provides a VC nanoparticle-strengthened X90 steel plate for a plastic pipe, and a manufacturing method thereof. The steel plate comprises the following components in percentage by weight: 0.06%-0.12% of C, 0.10%-0.30% of Si, 0.60%-1.40% of Mn, 0.07%-0.15% of V, 0.001%-0.004% of N, 0.01%-0.04% of Ti, 0.025%-0.045% of Al, not greater than 0.010% of P, not greater than 0.005% of S, 0.10%-0.30% of Cu, 0.10%-0.30% of Mo, 0.10%-0.30% of Cr, 0.10%-0.30% of Ni and the balance Fe and inevitable impurity elements. The manufacturing method comprises the following steps: material preparation, converter or electric furnace smelting, external refining, casting, plate blank reheating, controlled rolling and controlled cooling. The steel plate produced by the manufacturing method meets the various mechanical property requirements of the X90 steel plate for the plastic pipe, and is especially high in low-temperature toughness and anti-HIC property.

The invention provides an Nbc nano-particle reinforced steel plate for X90 plastic pipes and a manufacturing method of the steel plate. The steel plate comprises, by weight, 0.06-0.12% of C, 0.10-0.30% of Si, 0.60-1.40% of Mn, 0.07-0.15% of Nb, 0.01-0.004% of N, 0.01-0.04% of Ti, 0.025-0.045% of Al, not greater than 0.010% of P, not greater than 0.005% of S, 0.10-0.30% of Cu, 0.10-0.30% of MO, 010-0.30% of Cr, 0.10-0.30% of Ni and the balance being Fe and other inevitable impurity elements. The manufacturing method includes the steps of preparing of materials, smelting in converter or electric furnace, external refining, casting, reheating of plates, controlled rolling and controlled cooling. The steel plate produced by the method has good plastic deformation capacity, and can guarantee safety of oil and gas transmission pipelines laid in zones with complex geological conditions.

The invention discloses a rotating shaft mechanism, and the rotating shaft mechanism comprises a plurality of connection units which are connected sequentially. Each connection unit comprises a firstconnecting part and a second connecting part; a first rotating shaft passing through the first connecting part and the second connecting part; a third connecting part; a second rotating shaft passingthrough the second connecting part and the third connecting part; a fourth connecting part; a third rotating shaft passing through the third connecting part and the fourth connecting part; a fourth rotating shaft passing through the fourth connecting part, wherein all rotating shafts are parallel to each other, and through holes which are disposed on all connecting parts and respectively allow thecorresponding rotating shafts to pass through are strip-shaped holes. According to the rotating shaft mechanism, because the rotating shafts are disposed in the strip-shaped holes, the rotating shafts can move and rotate, thereby achieving the uniform extending of the connection units, enabling a neutral layer of the rotating shaft mechanism to be transferred to the surface of a bent inner side to be closer to the neutral layer of a flexible curtain at the inner side of the rotating shaft mechanism, and reducing the damages to the flexible curtain. The invention also provides an electronic equipment with the above rotating shaft mechanism.

The invention discloses one-time cold-rolled continuous annealing packaging steel and a preparation method thereof, and belongs to the technical field of steel preparation. The one-time cold-rolled continuous annealing packaging steel comprises, by mass, 0.03%-0.08% of C, smaller than or equal to 0.02% of Si, 0.15%-0.40% of Mn, smaller than or equal to 0.015% of P, smaller than or equal to 0.012%of S, 0.03%-0.07% of Als, 0.0125%-0.0145% of N and the balance Fe and impurities. According to the one-time cold-rolled continuous annealing packaging steel and the preparation method thereof, the packaging steel with the ferrite+cementite structure and the high forming property can be produced, and the high transverse elongation after baking is achieved.

The invention discloses non-quenched and non-tempered 980 MPa grade high-strength strapping steel and a production method thereof. The production method comprises work procedures of hot rolling, cooling, cold rolling and bluing. The non-quenched and non-tempered 980 MPa grade high-strength strapping steel is characterized in that chemical components of the non-quenched and non-tempered 980 MPa grade high-strength strapping steel comprise, by weight percentage, 0.17%-0.23% of C, 1.15%-1.35% of Mn, smaller than or equal to 0.35% of Si, smaller than or equal to 0.015% of S, smaller than or equal to 0.025% of P, larger than or equal to 0.015% of Als, smaller than or equal to 0.0060% of N and the balance iron and inevitable impurities. According to the method, medium low C is adopted, compared with conventional Mn component design, by means of control over a cooling path of the cooling work procedure, the partition of C in the phase change process of the steel is adjusted, medium temperature reeling is controlled, the pearlite transformation organization conversion is avoided, a ferrite bainite organization with the performance better than that of ferrite pearlite can be obtained, and ferrite bainite steel has high tensile strength, good uniform elongation performance and high n value. By means of the method, the high-strength strapping steel with the tensile strength larger than or equal to 980 Mpa and the elongation rate A30 larger than or equal to 10% can be obtained.

A discharge lamp is disclosed, comprising a bulb that is mounted on a base. Four metal fastening brackets which are arranged in an approximately regular fashion around a longitudinal axis of the lamp and are offset relative to each other protrude from the base. Said fastening brackets are welded to a metal clamp which firmly embraces the base. Each fastening bracket has a holding section and an adjacent welded section. A welded cross-section in a joining plane located between the metal clamp and the welded section has a minimum area of 0.5 mm2, and/or the holding section has at least one recess.

The invention provides a pushing-sliding installation device and method for a sail type box steel beam. The installation device comprises a support, a first sliding way, a second sliding way and a pusher. The first sliding way and the second sliding way are horizontally arranged in parallel. The support is arranged between the first sliding way and the second sliding way. The pusher is arranged along the first sliding way and the second sliding way. The installation method comprises the steps that the two ends of the steel beam are hoisted to the first sliding way and the second sliding way at first, then, the steel beam is supported by the support, then the pusher is used for pushing the steel beam to enable the steel beam to slide to a preset position, the same operation is implemented on multiple steel beams, and installation and fixing of a roof steel structure can be completed. According to the pushing-sliding installation device and method for the sail type box steel beam, the construction engineering of a large number of scaffolds is avoided, the redundant welding workload is omitted, and the high-altitude in-place installation precision of components and the installation efficiency of the sail type box steel beam roof structure are improved.

The invention discloses a horizontal well fracturing method for promoting fracture height extension through two times of acid injection and inter-cluster temporary plugging. The horizontal well fracturing method comprises the following steps that planar flow-limiting perforation operation is conducted; variable-displacement acid pretreatment operation is conducted; a main fracture is built by adopting a high-viscosity glue solution, and the fracture is expanded by adopting low-viscosity slickwater; fracturing fluid carrying calcium carbonate particles is injected; fracturing fluid carrying theacid-resistant hollow temporary plugging ball is injected; low-viscosity slickwater is injected; acid liquor is injected to dissolve the calcium carbonate particles; the fracturing fluid is continuously injected; displacement operation is conducted; a bridge plug is lowered; and the steps are repeated until all sections are constructed, and plug drilling, flowback, testing and production solvingafter fracturing are conducted. According to the horizontal well fracturing method, planar flow-limiting perforation, calcium carbonate particle temporary plugging and acid-resistant hollow temporaryplugging ball temporary plugging processes are adopted, the single-cluster displacement is increased, the extension length of fractures in the height direction is effectively increased, uniform fracture initiation and extension of multiple clusters of fractures are promoted, finally, the longitudinal use degree of a shale gas reservoir is finally increased, the reservoir transformation size is increased, and finally, the efficient development of the shale gas reservoir is realized.

The invention relates to the field of plastic uptake equipment, in particular to a plastic uptake device which comprises a mold assembly, a supporting assembly, a heating assembly and an adsorption assembly, wherein the mold assembly comprises a support and a lower mold base arranged on the support, the support is provided with a cavity, and the lower mold base is provided with a plastic uptake hole communicating the cavity with the space of the upper surface of the lower mold base; the supporting assembly comprises a lifting rod, the lower end of the lifting rod is fixedly connected with the bottom surface, and the upper end of the lifting rod is fixedly connected with a clamping piece; the heating assembly comprises a heating plate and an air heater, an electric heating element is arranged in the heating plate, the heating plate is connected with a rack, and the air heater is communicated with the cavity through a first air pipe; and the adsorption assembly comprises a vacuumizer, and the vacuumizer is communicated with the cavity through a second air pipe. According to the device, the two surfaces of a plastic sheet are uniformly heated, uniform extension of the plastic sheet during plastic uptake is facilitated, uneven thickness of the plastic sheet caused by excessive falling of the heated and softened plastic sheet is prevented, and the quality stability of a product is favorably improved.