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74results about How to "Eliminate deflection" patented technology

Pretensioned prestressing composite girder and method for producing the same

Provided is a pre-tensioned prestressed composite beam, which is an I-shaped beam composed of H-shaped steel and concrete, the web plate of the H-shaped steel is provided with trapezoidal holes (14) at intervals, the upper flange and the lower flange of the H-shaped steel are welded with shearing nails, the outer periphery of the lower flange is enclosed with concrete to form a steel-concrete lower flange (4), and the inside of the steel-concrete lower flange is embedded with prestressed steel twisted wire by pretensioning method. The manufacturing method of the composite beam is that: a steel plate is cut into two tooth-shaped plates along tooth-shaped line to be respectively as the trapezoidal hole plates of the H-shaped steel flange, the trapezoidal hole plates are welded with steel plates to form the web plate, the web plate is welded with the upper flange and the lower flange to form the H-shaped steel (1) having trapezoidal holes, the H-shaped steel is put on a base surface with the lower flange downward, the two sides of the lower flange are provided with side molds, a stirrup (7) is arranged and steel twisted wires (3) are longitudinally fastened between the two side molds, the steel twisted wire is tensioned to tensioning state, the concrete for enclosing the H-shaped lower flange is poured and tamped between the two side molds, the steel-concrete lower flange (4) is formed after demolding, and the steel twisted wire at tensioning state is loosened after the concrete reached to predetermined strength and is cut off at predetermined position. The invention is suitable for beams of buildings.
Owner:杨峰

Combined device for improving working precision of comma scraper

The invention relates to a combined device for improving working precision of a comma scraper similar to a fine macroaxis. Two ends of an axis head of the comma scraper are supported by a bracket respectively; two ends of the axis head of the comma scraper positioned in the opposite inner sides of the two brackets are respectively and fixedly provided with a supporting arm vertical to the scraper axis; two supporting arms are provided with an auxiliary axis which has axial displacement along the scraper axis and is locked in the supporting arm; and a different position of the auxiliary axis is locked in the supporting arm to generate axial load with different sizes and directions on the supporting arm. The combined device can accurately and rapidly adjust tightening torques of nuts at two ends of the auxiliary axis according to the weight and working load born by the scraper, generates preset axial load, adds the needed torque to the comma scraper to balance bending moment which is generated by the weight and the working load born by the comma scraper or the fine macroaxis, removes the bending deformation generated by the weight and the working load and ensures that the edge linearity of the high-precision scraper still keeps high service precision in a working state.
Owner:HEFEI UNIV OF TECH

Apparatus and method for aligning shaft couplings

InactiveUS6171195B2Preventing damage to couplingPrecise alignmentYielding couplingFlanged jointsDrive shaftCoupling
An apparatus for precisely aligning bolt holes in first and second adjacent drive shaft couplings, including a cam pin for being positioned in the generally aligned bolt holes in the shaft couplings and rotated to bring the bolt holes in to more precise alignment. The cam pin includes a first, relatively large diameter segment having a cylindrical wall defining a first longitudinal axis for being positioned in a precisely fitting condition in the bolt hole of the first coupling, and a second, relatively small diameter segment having a cylindrical wall defining a second longitudinal axis offset from and eccentric to the longitudinal axis of the first segment for being relatively loosely positioned in the generally aligned bolt hole of the second coupling. A cam sleeve is provided for being positioned in axial and rotational sliding relation over the small diameter segment of the cam pin and within the bolt hole of the second coupling. The cam sleeve has an offset bore defining a progressively varying wall thickness whereby rotation of the cam pin and cam sleeve relative to each other and to the bolt holes within which they are positioned brings progressively varies the overall diameter of the cam pin to bring the bolt holes into precise alignment for installation of the connecting bolts.
Owner:FERGUSON LESLIE W

Stripping and fixing device of stretching machine

ActiveCN104003231BBlock replyPrevent swimmingUnfolding thin materialsWebs handlingScrew threadContact effects
An edge peeling and positioning device of a spreading machine belongs to the field of clothing machines. The spreading machine comprises a spreading table, a machine frame is arranged on the spreading table and provided with an upper cloth guiding roller, a lower cloth guiding roller, a cloth pressing roller, a large cloth spreading roller and a lower cloth spreading roller. The edge peeling and positioning device comprises a beam and a pair of toothed belt type edge peeling mechanisms and is characterized by further comprising a front cloth expanding roller, a rear cloth expanding roller and a peeled and expanded cloth edge maintaining roller, wherein the front cloth expanding roller is supported on the machine frame and provided with front cloth expanding threads, the rear cloth expanding roller is provided with rear cloth expanding threads, and the peeled and expanded cloth edge maintaining roller is provided with flanges; the beam is fixedly provided with a pair of belt supporting unit seats, which extend into an edge peeling toothed belt cavity and are fixedly provided with belt supporting units, and the belt supporting units are arranged inside the edge peeling toothed belt cavity and are in contact with the inner side of the edge peeling toothed belt. The edge peeling and positioning device of the spreading machine enables the cloth edges of both sides in the length direction of cloth spread on the spreading table to maintain a trim state, prevents both sides the cloth from moving towards the middle, eliminates the deflection of the edge peeling toothed belt and improves the integral contact effects of the edge peeling toothed belt with the cloth edges.
Owner:SUZHOU BIYANGTE CLOTHING EQUIP CO LTD

Process for heating sleeve shaft through magnetic induction by large ring component

The invention relates to a process for heating a sleeve through magnetic induction by a large ring component. Finish machining is conducted on the ring component until certain size of the ring component is reached before shrinkage fit. In order to avoid thermal consumption after heating and prevent the surface of a ring from being burned due to the fact of partial overheat, asbestos cloth is coated and surrounds the outer surface of the ring, induction coils are wound on the outer surface of the ring, the ring is lifted above a rotating shaft through a crane, and after the ring is heated, when the minimum size of the ring is detected to meet requirements of a drawing through a measuring bar, the ring is smoothly dropped, and the shrinkage fit is conducted on the ring. After the ring is cooled to room temperature, size difference of an outer ring of the ring before the shrinkage fit and after the shrinkage fit is not larger than 0.02 millimeter. After the shrinkage fit is finished for the first time, the ring does not need machining a large equipment for the second time again after the shrinkage fit, the lowest heating temperature is controlled through intermediate-frequency electromagnetic induction heating, and deformation of the ring is small after the shrinkage fit after the ring is heated. The process for heating the sleeve shaft through magnetic induction by the large ring component has the advantages of being simple in operation, simple in required equipment, low in manufacturing cost, short in working period and the like, can save a large amount of cost from secondary machining to large-equipment machining, and is very high in application value.
Owner:HARBIN ELECTRIC MASCH CO LTD

High-temperature flange sealing structure comprising flexible graphite metal omega-shaped tooth composite gasket

InactiveCN104565618APrevent leakageLeakage slowed or even eliminatedFlanged jointsInterference fitGraphite
The invention relates to the field of a pipeline flange sealing structure, in particular to a high-temperature flange sealing structure comprising a flexible graphite metal omega-shaped tooth composite gasket. The high-temperature flange sealing structure is characterized by comprising an upper flange, a lower flange and the flexible graphite metal omega-shaped tooth composite gasket. The upper surface and the lower surface of a metal frame of the flexible graphite metal omega-shaped tooth composite gasket are provided with annular boss in multiple circles respectively, the annular bosses are provided with omega-shaped sections and arranged at equal distance, the planar parts of the upper and lower surfaces of the flexible graphite metal omega-shaped tooth composite gasket are provided with flexible graphite layers, annular grooves matched with the annular bosses are arranged on the contact surfaces of the upper flange, the lower flange and the flexible graphite metal omega-shaped tooth composite gasket and provided with rectangular sections, the annular bosses are inserted into the annular grooves correspondingly and are in interference fit with the same. The high-temperature flange sealing structure can be applied to high-temperature and -pressure working conditions, excellent tightness can be kept for a long time, and leak of the flanges can be effectively prevented.
Owner:WUHAN INSTITUTE OF TECHNOLOGY

Corner and edge system of flexible structural system curtain wall

ActiveCN103437466ASolve the damageSolve the problem of surface material damageWallsVertical edgeStructural system
The invention provides a corner system of a flexible structural system curtain wall. A corner formed by end side vertical edges of curtain wall panels at both sides is provided with a rigid vertex angle pillar; the vertical edges, near the corner, of the curtain wall panels, are telescopically and fixedly arranged onto fixed connecting devices fixed to the vertex angle pillar; a seal structure of each vertical gap between the curtain wall panels and the fixed connecting devices is a telescopic seal structure; the end side vertical edges of the curtain wall panels are also provided with a corner supporting member; one end of the corner supporting member is hinged to the vertex angle pillar; the other end of the corner supporting member is hinged to a major structure. According to an edge system, the end side vertical edges, fixedly connected with the major structure, of curtain wall panels are telescopically and fixedly arranged onto the major structure, and the seal structure of each curtain wall panel is the telescopic seal structure. According to the corner and edge systems provided by the invention, the problem that the seal structure of the curtain wall is damaged or plane materials are damaged due to large-deflection deformation of the flexible structural system curtain wall can be well solved.
Owner:JANGHO GRP
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