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1250results about How to "Prevent twisting" patented technology

Dynamic characteristic parameter test device and method of sliding guide rail junction surface

The invention relates to a dynamic characteristic parameter test device of a sliding guide rail junction surface, which can be simplified into a single degree of freedom system. The device comprises a base, an installation platform, a fixed guide rail, a wedge-shaped block, an inlaid strip, a sliding block, a plurality of piezoelectric type acceleration sensors, a vibration exciter, an elastic rope, an impedance head, a stand, a normal force applying bolt, a rubber ring, a charge amplifier, a data acquisition unit, a power amplifier and an electronic computer. Compared with the prior art, thedynamic characteristic parameter test device has the advantages that: the structure is compact, the test principle is distinct, dynamic characteristic parameters of the junction surface under different load states can be measured by adjusting the pretightening force of a normal force applying bolt, the vibration exciting force direction passes through the gravity of the sliding block during measurement so that vibration signals of the sliding block and the base can be measured simultaneously, the influence of the vibration signals of the base is eliminated when a frequency response function of a system is calculated, and the characteristics of high efficiency, high stability and high precision are achieved.
Owner:NANJING UNIV OF SCI & TECH

Electric outlet with rotatable receptacles

An electric outlet with a plurality of individual switches and rotatable receptacles is provided for efficiently protecting against possible electric hazard and for organizing electric extension cords within a small living space. The electric outlet provides three kinds of rotatable receptacles capable of rotating on a plan plane, vertical plane or both a plan plane and vertical plane at the same time. The electric outlet capable of rotating on a plan plane and vertical plane at the same time comprises a disk-type receptacle (11) and a cylindrical-type receptacle (31). Each disk-type receptacle (11) comprises a top disk part (51), lower cylindrical body part (52) with a certain length and a pair of outer stoppers (53). Each cylindrical type receptacle comprises a hollow part (61) for inserting a disk type receptacle (11), an annular rim (62) to seat the flat mounting surface (56) of disk-type receptacle, a pair of inner stoppers (63) and a pair of shafts (64) disposing on both lateral sides for limiting rotation. A protecting cover (57) as a safety device installs on top of disk part (51) for automatically blocking the prong slots (54) by resilient part (59) during unplugging for preventing a possible electrical hazard. The assembled disk-type and cylindrical-type receptacle is installed to the rotatable electrical outlets. The various decorative electric outlets being designed to hang on a wall are also provided to apply thereof.
Owner:LEE JAE HA

Replacement process for lifting steel wire rope of vertical shaft multi-rope friction lifter

The invention discloses a replacement process for a lifting steel wire rope of a vertical shaft multi-rope friction lifter. The replacement process comprises the following steps: (1) placing a new rope plate and an old rope receiving plate at proper positions at the balance hammer side of an upper shaft mouth, and stopping a tank cage at the position of the upper shaft mouth; (2) at the upper shaft mouth, connecting a traction rope with new and old ropes by the rope head of the new rope via a guide wheel at the balance hammer side; (3) starting a lifter to descend the tank cage by a hoist at the speed of 0.4m/s; (4) respectively clamping the new rope at a hoist house, an upper hoisting sheave and a lower hoisting sheave by compound board cards and then lifting the new rope, and dismounting the traction rope for connecting the new rope with the old rope; (5) reversely driving the hoist at the speed of 0.4m/s, and lifting the tank cage to the upper shaft mouth; (6) arranging an anti-running device and a rope tightener, and descending the tank cage until the balance hammer is lifted to the upper shaft mouth; (7) dismounting the anti-running device and the rope tightener, and mounting a rope clamper; (8) cutting off the old steel wire rope below a hoist roller, and replacing the old rope with the new rope; and (9) after the tank cage is lifted to the upper shaft mouth, mounting the rope clamper, connecting the new rope with a wedge-shaped rope, regulating the rope length, dismounting the rope clamper, and implementing pilot run after the rope replacing process is completed.
Owner:XUZHOU JOY TECH

Device and method for testing bonding shearing strength of structural adhesive interface

The invention relates to a device and method for testing bonding shearing strength of a structural adhesive interface. The device comprises a bonding base material testing piece and two bonded testing pieces, wherein the bonding base material testing piece and the two bonded testing pieces are bonded in a crisscross manner by using a structural adhesive, the two bonded testing pieces are mutually parallel and are located at two sides of the bonding base material testing piece, the respective centers of the two bonded testing pieces and the bonding base material testing piece are located on the same straight line, a compression load is applied to the bonding base material testing piece to ensure that shear stress can be generated on a bonding interface of two materials, and the bonding shearing strength of the interface is calculated through the shear stress generated during damaging. The device and the method for testing the bonding shearing strength of the structural adhesive interface are suitable for testing the bonding shearing strength of the interface among different materials with certain bonding layer thicknesses, and especially suitable for evaluating the bonding strength of the structural adhesive between glass of a curtain for doors and windows of a building and a metal base material.
Owner:北京玻钢院检测中心有限公司

Stepping scanning torque measuring device in magnetic-levitation bearing support structure

InactiveCN102830041APrevent twistingOvercome the shaking phenomenonFlow propertiesJewel bearingFiber type
The invention discloses a stepping scanning torque measuring device in a magnetic-levitation bearing support structure, belonging to the measuring equipment, particularly the equipment for detecting the change of blood flow. The stepping scanning torque measuring device comprises a measuring outer cylinder, a measuring inner cylinder, a middle shaft, an upper bearing and a lower bearing. The middle shaft is arranged on the measuring inner cylinder, and the upper bearing and the lower bearing support the middle shaft. The stepping scanning torque measuring device is characterized in that: the upper bearing and the lower bearing are both magnetic-levitation bearings and are fixed on the respective bracket, a horizontal swinging rod is fixed on the middle shaft, the inner end of a balance spring is fixed on the middle shaft, the outer end the balance spring is fixed on a balance spring bracket, the periphery of a large rotating disc which is provided with a displacement detecting component on the edge is provided with a gear, the gear is meshed with a driving supporting wheel driven by a stepping motor, and the large rotating disc is supported horizontally by three supporting wheels including the driving supporting wheel. Because the upper magnetic-levitation bearing and the lower magnetic-levitation bearing are fixedly connected with the middle shaft on the measuring inner cylinder, the phenomenon that the suspension-fiber type equipment shakes in the process of measuring is eliminated, and the defect that the jewel bearings have frictional force is overcome.
Owner:山东美医林电子仪器有限公司

High-reliability high-stability multi-rotor-wing unmanned aerial vehicle with quick-dismounting function

The invention provides a high-reliability high-stability multi-rotor-wing unmanned aerial vehicle with a quick-dismounting function. In order to quickly dismount the unmanned aerial vehicle, the central disc and arms of the unmanned aerial vehicle are split, fan-shaped plates with central angles of more than 180 degrees are arranged on the end surfaces of arm inner parts in arm connecting structures to serve as first limiting convex grooves, fan-shaped plates with central angles of less than 180 degrees are arranged on the end surfaces of central disc inner parts in the arm connecting structures to serve as second limiting convex grooves, and each first limiting convex groove and each second limiting convex groove are clamped together to form a round plate anti-twist structure; meanwhile, in order to prevent twisting of each anti-twist structure, two column positions are added in each connecting structure to reinforce the anti-twist effect, and the arm inner parts are integrally and fixedly connected with the central disc inner parts through thread suites on the outer sides of the formed anti-twist structures, so that the firmness of the unmanned aerial vehicle during flight is guaranteed and the anti-twist function of the arms is improved. The unmanned aerial vehicle has the advantages of simple structure, and has the advantages of quickness for dismounting and convenience for connecting and mounting; especially, the firmness and rigidity of connection are guaranteed, and the flight reliability and stability of the unmanned aerial vehicle are greatly improved.
Owner:深圳市科卫泰实业发展有限公司

Continuous rigid frame bridge based on steel truss-concrete slab composite beam

The invention discloses a continuous rigid frame bridge based on a steel truss-concrete slab composite beam. The continuous rigid frame bridge comprises a bridge substructure and the steel truss-concrete slab composite beam supported by the bridge substructure. The steel truss-concrete slab composite beam comprises a steel truss and a concrete bridge deck which is laid over the steel truss. The steel truss comprises one or more steel truss units; each steel truss unit is an inverted-triangle truss girder, wherein the inverted-triangle truss girder is composed of two upper chords, a lower chord, a left line of diagonal web members and a right line of diagonal web members, each upper chord comprises a first horizontal steel plate and a plurality of first vertical perforated steel plates evenly laid on the first horizontal steel plate, an upper chord transverse connecting system connected between the two upper chords comprises a plurality of upper chord transverse connecting pieces, and each upper chord transverse connecting piece comprises a second horizontal steel plate and a plurality of second vertical perforated steel plates evenly laid on the second horizontal steel plate. The continuous rigid frame bridge is simple in structure, reasonable in design, convenient to construct, good in stress performance, good in using effect and capable of effectively solving various problems existing in an existing continuous rigid frame bridge.
Owner:CHANGAN UNIV

Prefabricated assembly FRP-reinforcing steel-bar-concrete combined bridge deck and construction method

The invention discloses a prefabricated assembly FRP-reinforcing steel-bar-concrete combined bridge deck and a construction method. The prefabricated assembly FRP-reinforcing steel-bar-concrete combined bridge deck comprises a semiclosed FRP groove and concrete inside the FRP groove, wherein the bottom surface and two side surfaces of the concrete are wrapped by the FRP groove to form the combined panel, a transverse through reinforcing steel bar reserved tunnel is formed in a transverse setting position of the combined panel, a transverse prestress reinforcing steel bar is arranged in the reinforcing steel bar reserved tunnel to connect a plurality of FRP-concrete combined panel prefabricated components to form an integral bridge panel structure in a needed size. The construction method comprises the steps: firstly producing the semiclosed FRP groove; arranging an FRP rib and an embedded corrugated pipe, and fixing the FRP rib and the embedded corrugated pipe; pouring concrete; splicing a plurality of prefabricated FRP-concrete combined deck components into a whole by utilizing the prestress after the strength of the concrete reaches the requirement. The factorization prefabrication and on-situ assembling of the FRP combined bridge deck are realized, the structure is simple, and the construction is convenient.
Owner:SHANDONG UNIV

Solid-liquid mixing and stirring device

The invention discloses a solid-liquid mixing and stirring device. The solid-liquid mixing and stirring device comprises a shell body, wherein a rotary seat is arranged in the middle of the lower end in the shell body; the lower end of a stirring shaft is rotatably connected with the rotary seat; a limiting ring is rotatably connected with the middle of the stirring shaft; fixed rods are arranged at the outer side of the limiting ring; the other ends of the fixed rods are connected with an inner wall of the shell body; a plurality of stirring blades are uniformly connected with the stirring shaft; the outer ends of the stirring blades are connected with mounting bases; supports are arranged at the front sides of the mounting bases; the supports are rotatably connected with sleeve shafts; a plurality of small blades are arranged at the outer sides of the sleeve shafts; a feeding pipe is arranged at the upper end of the left side of the shell body; the feeding pipe comprises an outer pipe and an inner pipe; a cavity is formed between the outer pipe and the inner pipe; a plurality of cyclone inclined holes are uniformly formed in the inner pipe along the circumferential direction; the upper side of the outer pipe is connected with a water inlet pipe; a water pump is arranged on the water inlet pipe; the left end of the inner pipe is connected with a charging pipe and the charging pipe is provided with a charging pump. The solid-liquid mixing and stirring device is simple in structure, convenient to use, good in stirring effect, high in stirring efficiency and long in service life.
Owner:ZHENGZHOU HAOEN ELECTRONICS INFORMATION TECH CO LTD

Spinning technology of two-spinning-roller semicontinuous high-speed spinning machine

The invention relates to a spinning technology of a two-spinning-roller semicontinuous high-speed spinning machine, and belongs to the technical field of semicontinuous spinning machines. The spinning technology comprises the steps of glue supplying, thread-line forming, spinning and winding, wherein the spinning is carried out through a spinning device. The spinning device comprises two spinning rollers which are transversely arranged relative to an operating surface of a spun surface, thread lines surround the spinning rollers, and drafting, solidifying and deacidification in the spinning steps are achieved when the spinning rollers rotate. The spinning technology solves the problems that thread lines of a semicontinuous spinning machine in the prior art are insufficient in reaction, the spinning process cannot be accelerated, and production efficiency and the product quality cannot be taken into consideration. The arrangement direction of the spinning rollers is changed so that the thread lines can walk for a longer distance while the spinning process of the spinning machine is accelerated and the structures of other components of original equipment are not changed, the thread lines can be reacted with acid bath more fully, and both production efficiency and product quality are taken into consideration.
Owner:YIBIN HIEST FIBER +2
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