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95 results about "Eccentric compression" patented technology
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Compound type connection shear wall structure and assembling method thereof
ActiveCN105442727AEasy assembly and constructionPrecise construction and assemblyWallsFloor slabUltimate tensile strength
The invention discloses a compound type connection shear wall structure and an assembling method thereof. The compound type connection shear wall structure comprises N shear wall components of the same structure, wherein every two adjacent shear wall components are connected through a compound shear key and a key groove so that a compound type connection shear wall can be formed. Due to the mutual guide-in effect of the compound shear keys and the key grooves, the construction precision is improved, and eccentric compression generated by inaccurate assembling is avoided. Because the shear key on each shear wall component below can bear the weight of the corresponding shear wall component above when the next layer is assembled, assembling of a wall body of a previous layer can be instantly conducted after floor pouring is completed without waiting till floor concrete reaches the strength, and the assembling cycle of floors can be greatly shortened. The shear keys of the shear wall components below are embedded in the key grooves of the shear wall components above, the shear keys can bear transverse shearing force, the shear resistance of the structure is enhanced, and reliability of the structure is enhanced.
Owner:ZHEJIANG UNIV +2
Lining member quasi-static test apparatus and lining member quasi-static test method
ActiveCN107228803ASimple structureEasy to operateMaterial strength using repeated/pulsating forcesSteel frameEngineering
The present invention discloses a lining member quasi-static test apparatus and a lining member quasi-static test method. The lining member quasi-static test apparatus comprises a reaction force device, a loading device, a lining member and a surrounding rock simulation system, wherein the reaction force device comprises a reaction force wall and a reaction force steel frame, a sliding support seat is arranged above a vertical jack, the lower portion of the vertical jack is connected to the lining member so as to apply a static load and simulate the eccentric compression state of the lining member, a horizontal actuator is connected to the top portion of the lining member so as to apply a dynamic load and simulate the action of the repeated load applied on the lining member, a spring is arranged on the right side of the lining member so as to simulate the constraint action of the surrounding rock, and by changing the type of the spring and disassembling the local spring, the different levels of the surrounding rock, the surrounding rock softening, surrounding rock voiding and other surrounding rock conditions can be simulated. According to the present invention, with the apparatus and the method, the dynamic and static coupling effect of the lining member can be simulated, the lining member back cavity and other defects can be simulated, and the advantages of test economy, simple operation, strong reliability and the like can be provided.
Owner:KUNMING UNIV OF SCI & TECH
Bit-expanded anchor rope construction method by using mechanical hole expansion
The invention discloses a bit-expanded anchor rope construction method. The method comprises the steps of drilling, hole expansion, deslagging, grouting and anchor rope installation, wherein the hole expansion is performed by a mechanical hole expanding drill bit; the deslagging is conducted after hole expansion, specifically compressed air is added in a drill rod through a four-way mixing valve connected with the drill rod for blowing, and after water is added for stirring, the compressed air is added again for blowing; and according to the grouting step, cement slurry is injected to the bottom of an anchor hole from the drill rod through the four-way mixing valve connected with the drill rod for stirring to form cement soil with remained slurry. The hole expanding method can form a bottom expanding straight section to meet the end expanding requirements; the deslagging method can effectively remove the slurry in the anchor hole and effectively prevent hole collapse; according to the method, stirring is conducted after grouting, the remained slurry and the cement slurry form high-strength cement soil, the strength of an anchored body is guaranteed; and the anchor rope is in middle of the end expanding section to prevent eccentric compression of the anchor rope on the expanding section.
Owner:成都四海岩土工程有限公司
Semi-covering semi-darkened construction method for separated tunnels downwards penetrating through high and steep V-shaped gully eccentric compression section
ActiveCN103883328AReasonable designThe construction steps are arranged compactlyUnderground chambersTunnel liningEarth surfaceSubsidence
The invention relates to a semi-covering semi-darkened construction method for separated tunnels downwards penetrating through a high and steep V-shaped gully eccentric compression section. The semi-covering semi-darkened construction method mainly comprises the steps of (1) carrying out construction preparation, (2) carrying out a cover-excavation method construction technology on a previous shallowly-buried side main tunnel, (3) carrying out a six-step bench excavation method construction technology on a later deeply-buried side main tunnel, (4) taking a slope supporting measure for a high and steep gully region, and (5) carrying out an earth surface waterproof and drainage construction technology. The semi-covering semi-darkened construction method is reasonable in design, compact in construction step and convenient to construct, ground surface subsidence, subsidence of a left tunnel vault and a right tunnel vault, contraction of the peripheries of the interiors of the tunnels and stability of a slope of the high and steep gully region can be effectively controlled, the number of construction disasters is reduced, the project cost is reduced, stability of tunnel surrounding rock and the gully slope is ensured, and the risk of construction of the separated tunnels penetrating through the high and steep V-shaped gully eccentric compression section is reduced.
Owner:FUZHOU UNIV
Ink cartridge and recording device
The invention provides an ink cartridge and a recording device. The ink cartridge comprises a body, a specified interface, and a joint portion. The body is provided with a front side and a back side, wherein the front side is equipped with an ink supplying portion which supplies ink stored in an ink chamber for the outer parts of the ink chamber, and the back side is positioned to face to the front side. The specified interface is positioned to approximately adjacent to the ink supplying portion of the front side, and the specified interface is constructed to be compressed eccentrically by an eccentric compression component along a specified direction. The joint portion is constructed to joint with a locking part of a cartridge installation portion so as to keep the body in an installation state. The ink cartridge can be installed in the cartridge installation portion of a recording device.
Owner:BROTHER KOGYO KK
Cross inserting plate for power transmission line steel tube tower
ActiveCN103255946AEnhanced ability to resist side bendingImprove carrying capacityTowersGusset plateButt joint
The invention provides a cross inserting plate for a power transmission line steel tube tower, belongs to the field of inserting plate connecting structures in power transmission line steel tube towers, and solves the problem that the cross butt joint gap of a connector is weaker in rigidity, so that overall stress coordination of the connector is improved. The cross inserting plate comprises gusset plates and inserting plates, the gusset plates are crossly arranged to form a gusset plate joint, the inserting plates are crossly arranged to form an inserting plate joint, the gusset plate joint and the inserting plate joint are connected together through connectors and fasteners, and the connectors are crimped plates which are symmetrically distributed about the center of the cross inserting plate. By the aid of the crimped plates, as out-of-plane rigidity is enhanced, lateral bending resistance of crimped combination is enhanced, eccentric compression bearing capacity is improved by 44.51% as compared with that of a strip plate connecting mode, structural stress coordination of the steel tube tower is better, structural stability is enhanced, the connecting mode can be used for connecting joints of main materials, diagonal materials, cross diagonal materials and the like in the steel tube tower, and the cross inserting plate is simple to machine, easy to mount and low in service cost.
Owner:CHINA ELECTRIC POWER RES INST +1
Novel cylindrical hinge rotating bracket for static force loading experiment
The invention discloses a novel cylindrical hinge rotating bracket for static force loading experiment. The novel cylindrical hinge rotating bracket for static force loading experiment mainly comprises a lower base, upper node plates and a clamp support, wherein the lower base mainly comprises a flat plate and a semi-cylindrical supporting part; the upper node plates mainly comprise an upper node plate I, an upper node plate II and an upper node plate II; the clamp support mainly comprises a screw, a lug plate, a baffle plate and a round reinforcing rib. The novel cylindrical hinge rotating bracket for static force loading experiment, disclosed by the invention, is simple to configure, convenient to manufacture and install, strong in loading force, capable of effectively stimulating the boundary condition of one-way hinge joint, suitable for static force loading experiment of compression members with various section forms such as a rectangular form and an H-shaped form, and can be widely applied to the experiment of shaft center compression members and eccentric compression members.
Owner:SOUTHEAST UNIV
Method for reinforcing rectangular-section concrete columns through prestressed steel plate hoops
InactiveCN105926961AGive full play to the tensile strengthImprove bearing capacityBuilding repairsSheet steelAxial compression
The invention discloses a method for reinforcing rectangular-section concrete columns through prestressed steel plate hoops. The method is mainly characterized in that the steel plate hoops are mounted on the concrete columns and are subjected to lateral expansion through an expanding tool, pre-tightening clamping bars are mounted and are connected with the steel plate hoops through point welding after the expanding tool is withdrawn, and the rectangular-section concrete columns are reinforced through the prestressed steel plate hoops. According to the reinforcing method, the effective active constraint functions on the corners and the four edges of each rectangular column are achieved, the basically uniform annular constraint effect can be formed, and concrete is in a stressed state in three directions, so that the performance of bearing capacity, ductility and the like of the concrete columns is improved more effectively, and the method is suitable for reinforcing construction of the rectangular-section concrete columns under axial compression or small eccentric compression.
Owner:郭猛
Method for ceaselessly conducting cast-in-place box girder reset and support replacement
InactiveCN109629461ARealize resetWon't hinder everyday useBridge structural detailsBridge erection/assemblySynchronous controlBody positions
The invention belongs to the technical field of bridge maintenance, and particularly relates to a construction method for completing the cast-in-place box girder body reset and support replacement without interrupting the traffic. By means of the method for ceaselessly conducting cast-in-place box girder reset and support replacement, control is realized through a synchronous control system and anejecting and pushing device, girder body reset and support replacement are conducted, repairing and support replacement can be directly conducted at the to-be-repaired girder body position, there isno need to interrupt the traffic in the construction period, the daily use of a box girder cannot be hindered, the normal production and life of the surrounding area are not influenced, the whole construction cycle is short, the construction period can be effectively shortened, and the construction cost is saved; meanwhile, by means of the construction method, the girder body reset can be realized, the eccentric compression problem of pier studs is effectively solved, the potential safety hazards are thoroughly eliminated, and the method is suitable for large-scale popularization.
Owner:NO 6 ENG CO LTD OF CCCC FIRST HIGHWAY ENG
A method for calculating the compressive bearing capacity of a double-angle steel cross-shaped combined section component
The invention discloses a method for calculating the compressive bearing capacity of a double-angle steel cross-shaped combined section member. The method comprises the following steps: establishing afinite element model of the double-angle steel cross-shaped combined section member; Performing finite element analysis on the finite element model of the double-angle steel cross-shaped combined section component to obtain a finite element analysis result; And carrying out regression fitting on the finite element analysis result to obtain a calculation formula of the axial compression bearing capacity of the double-angle steel cross-shaped combined cross-section component and a calculation formula of the eccentric compression bearing capacity of the double-angle steel cross-shaped combined cross-section component. According to the calculation method, a formula for calculating the compressive capacity of the double-angle steel cross-shaped combined section component is fitted, and a reference can be provided for engineering design by calculating through the formula.
Owner:重庆顺泰铁塔制造有限公司 +1
Shield segment erosion test device under chlorine salt environment and load coupling effects
ActiveCN103499495AAchieving one-sided one-dimensional erosionTruly reflect the environmentWeather/light/corrosion resistanceMaterial strength using tensile/compressive forcesPilot systemEngineering
The invention relates to a shield segment erosion test device under chlorine salt environment and load coupling effects, and the device comprises an artificial environment simulation test system, a static force loading system and a test system. According to the device, shield segment eccentric compression mechanics characteristics are realized by applying different loads by self-anchored mechanics conversion, and the actual occurrence environment of a shield tunnel can be simulated by single-sided one-dimensional erosion by use of a chlorine salt solution, so that chloride ion invasion and diffusion processes in an operation process of the shield tunnel segment can be actually simulated for studying shield tunnel segment concrete durability evolutionary mechanism under the chlorine salt environment and load coupling effects and forecasting lifetime. The test problem of single-sided one-dimensional erosion by use of the chlorine salt solution under a bias load can be solved.
Owner:CENT SOUTH UNIV
Rapid clamping drive plate
InactiveCN102642139AReasonable structureEasy to manufacturePositioning apparatusMetal-working holdersUltimate tensile strengthMachine tool
The invention relates to a rapid clamping drive plate. The rapid clamping drive plate comprises a clamping drive plate body, clamping jaws and an eccentric compression bar, wherein a circular hole for arranging a workpiece is axially arranged on the clamping drive plate body, two rectangular grooves are symmetrically installed on the end surface of the clamping drive plate body, the clamping jaws are installed in the rectangular grooves of the clamping drive plate body respectively through forcing screws, a semicircular groove is arranged on the lower portion of the clamping drive plate body, the eccentric compression bar is arranged in the semicircular groove of the clamping drive plate body through a hinge pin, the front end surfaces of the clamping jaws and the front end surface of the eccentric compression bar form three-point support in the circular hole circumference of the clamping drive plate body, the eccentric compression bar is rotated to press the workpiece tightly, and the workpiece arranged in the circular hole is clamped. During usage, when a spindle of the machine tool rotates, one side surface of the eccentric compression bar contacts a drive rod arranged on the machine tool, and the drive rod presses the eccentric compression bar to enable the workpiece to be clamped more tightly, therefore rotation is achieved. The rapid clamping drive plate has the advantages of being reasonable in structure, simple to manufacture, convenient to operate, low in labor intensity, reliable in clamping, and suitable for clamping of shaft diameters in different sizes.
Owner:TIANRUN IND TECH CO LTD
Reactive powder concrete large-eccentric compression member crack load calculation method
The invention discloses a reactive powder concrete large-eccentric compression member crack load calculation method. The stress distribution of the entire compression zone of a member is triangular similarly; the stress of the RPC concrete in the elastic state is still in the triangular distribution before the compression zone reaches the peak tension strain; according to the RPC concrete in the shaping state adjacent to the member compression zone edge, the stress is simplified to be in triangular distribution that the stress of the compression zone edge to the peak tension strain position is zero;an equilibrium equation is established for solution according to the equilibrium conditions of the section force and section torque; in the crack load calculation, the influence of the additional eccentric distance caused by large-eccentric compression member lateral deformation is considered, and the value is found as 5mm. The reactive powder concrete large-eccentric compression member crack load calculation method can be applied to reactive powder concrete large-eccentric compression member design calculation, the theoretical foundation for the is laid for promotion and application of the reactive powder concrete to eccentric compression members, and huge social and economic benefits are provided.
Owner:CENT SOUTH UNIV
Shear wall structure building assembly system design
InactiveCN108571063AConforms to building anti-seismicConforms to earthquake-resistant structuresBuilding constructionsRebarStructure building
The invention discloses a shear wall structure building assembly system design. The shear wall structure building assembly system design comprises positions of a shear wall sectional prefabricated horizontal cast-in-place belt and a shear wall sectional prefabricated vertical cast-in-place belt, a steel bar connection mode at the positions of the cast-in-place belts, assembly load-bearing force-transferring members and assembly connecting rods between sections, positions of slab sectional prefabricated cast-in-place belts, a steel bar connection mode at the positions of the cast-in-place belts and assembly force-transferring connecting rods between the sections. The shear wall sectional prefabricated horizontal cast-in-place belt is arranged at 1 / 6 floor height above the structural floorface and not less than 500mm, and the vertical cast-in-place belt is arranged to avoid the shear wall to restrain edge members. The slab cast-in-place belts are arranged at the position 100mm from thewall and the beam side. The assembly force-transferring connecting rods are arranged at the positions of the cast-in-place belts. o / >=14mm steel bars are connected by eccentric compression sleeves,and o / <=14mm steel bars are connected by U-shaped ribs and cross ribs. The design follows the seismic design idea of buildings, and the construction quality of cast-in-place nodes and the waterproofquality of rooms with water are easy to guarantee.
Owner:吕少雅
Wire frame sphere joint positioning rapid adjustment device and installation adjustment method thereof
PendingCN108590204ALimits eccentric compressionImprove assembly construction efficiencyBuilding material handlingArchitectural engineeringScrew thread
The invention discloses a wire frame sphere joint positioning rapid adjustment device. The wire frame sphere joint positioning rapid adjustment device comprises a base plate, a threaded round rod anda supporting steel pipe. A circular fixing hoop steel pipe is arranged on the surface of the base plate, and the threaded round rod is fixed to position, in the vertical axis direction of the fixing hoop steel pipe, of the base plate. Two curved plates are arranged on the outer side of the threaded round rod, and force transmitting plates are separately arranged on the upper and lower ends of thecurved plates. The supporting steel pipe is fixed to the force transmitting plate at the upper end. A movable hoop steel pipe is arranged between the supporting steel pipe and the fixing hoop steel pipe. Three hexagonal lock nuts are arranged on the threaded round rod, two of the hexagonal lock nuts are located between the two force transmission plates, another hexagonal lock nut is located belowthe force transmission plate at the lower part, and the hexagonal lock nuts are used for height adjustment and locking. The structural design of the wire frame sphere joint positioning rapid adjustment device is reasonable, and the upper and lower adjustment and rapid positioning and unloading can be realized, the assembly construction efficiency of a sphere joint wire frame is improved, the eccentric compression of the threaded round rod is reduced, the relative offset is not generated, and the fixation reliability is high.
Owner:THE SECOND CONSTR ENG CO LTD OF CHINA CONSTR THIRD ENG BUREAU
Compressor for increasing volumetric efficiency of cylinder
InactiveCN102338089AImprove suction efficiencyImprove performanceRotary/oscillating piston pump componentsLiquid fuel engine componentsSlip sheetCylinder block
The invention discloses a compressor for increasing volumetric efficiency of a cylinder, which comprises a motor, a cylinder body assembly and an eccentric compression roller, wherein the cylinder body assembly comprises a cylinder as well as an upper flange and a lower flange arranged at two ends of the cylinder in a covering manner, the upper flange and the lower flange are respectively provided with an upper silencer and a lower silencer, a crank of the motor is provided with the eccentric compressor roller, the cylinder is internally provided with a slip sheet, the cylinder body assembly also comprises a partition plate arranged between two eccentric compression rollers of two cylinders when the compressor is a dual-cylinder compressor; the side wall of one of the upper flange, the lower flange or the partition plate of the dual-cylinder compressor is provided with an air inlet communicated with a cylinder working cavity, the side end face of the rotating eccentric compression roller is matched with the air inlet and a channel between the air inlet and the cylinder working cavity can be closed; and the air inlet is a semi-crescent closed maximum air inlet region formed by vertically projecting a slip sheet center line and a rotating trajectory of an excircle high point and an inner hole high point of the eccentric compression roller on the wall of the upper flange, or the lower flange or the partition plate, wherein the excircle high point and the inner hole high point of the eccentric compression roller support against the top end of the slip sheet center line.
Owner:GREE ELECTRIC APPLIANCES INC +1
One-way eccentric hinge support and use method thereof
InactiveCN105588753AEasy to storeLess componentsStrength propertiesAxial compressionArchitectural engineering
The invention discloses a one-way eccentric hinge support and a use method thereof, and belongs to the field of constructional engineering. The one-way eccentric hinge support comprises a base, a load-bearing plate is arranged above the base, first connecting plates are fixedly arranged on the lower surface of the load-bearing plate, second connecting plates are fixedly arranged on the upper surface of the base, and the first connecting plates are hinged to the second connecting plates in a relatively rotatable mode; at least two sets of sliding baffles are arranged on the load-bearing plate, the sliding baffles slide along the load-bearing plate, therefore, the sliding baffles clamp a test component, and the test eccentricity of the test component is adjusted. The one-way eccentric hinge support is easy to machine and convenient to install and use, and all parts are easy to store after being disassembled. The support is suitable for tests of axial compression, axial tension, eccentric compression, eccentric tension and the like, and an ideal use effect can be achieved.
Owner:SHANDONG UNIV
Double-knife hinge support suitable for compression test
InactiveCN110220771AEasy to installEasy to adjustMaterial strength using tensile/compressive forcesAxial compressionEngineering
The invention relates to a double-knife hinge support suitable for a compression test. The double-knife hinge support comprises a lower bottom plate, an intermediate bottom plate and an upper bottom plate which are stacked together, and the upper side of the upper bottom plate is provided with a clamp for positioning the lower end of a component; the lower side face of the upper bottom plate and the upper side face of the lower bottom plate are provided with knife hinges which are orthogonal; and grooves matched with the knife hinges on the upper and lower bottom plates are respectively arranged on the upper and lower side surfaces of the intermediate bottom plate. The double-knife hinge support of the invention can adopt different clamps according to components of different cross sections, and is suitable for the components of different sizes and different cross section types; the clamps are convenient to mount and convenient to adjust, and have the characteristics of being high in test precision and good in controllability; and the test control and safety problems during the axial compression test of the components, such that the alignment of the column axis is difficult, the rotation of the support is difficult, the eccentricity degree in an eccentric compression experiment is difficult to be quantitatively controlled, and a connecting plate falls off in the test process aresolved.
Owner:FUZHOU UNIV
Lock head and key
ActiveCN104453385ALarge amount of codingNot easy to openKeysCylinder locksElectrical and Electronics engineeringEccentric compression
The invention discloses a lock head. The lock head comprises a shell, a core, a number marble, a flat-end marble, a first eccentric compression piece and a dial wheel piece and further comprises a first positioning pin key, a first pin key groove formed in the inner wall of the shell, a second eccentric compression piece arranged between the first positioning pin key and the core, and a driving part arranged on the number marble, capable of being combined with the first positioning pin key when the number marble rotates along with the core and used for driving the first positioning pin key to be rotated out of the first pin key groove. The eccentric compression force of the second eccentric compression piece makes the first positioning pin key embedded and reset in the direction of the first pin key groove, the number marble can provide multiple secret key codes when axially rotating in the key insertion process and when the core axially moves in combination with the change of the length of the number marble, and therefore the extremely good technical opening preventing capacity is achieved.
Owner:四川王力安防产品有限公司
Rotating joint connecting device for prefabricated component inclined strut and application method
ActiveCN105569363ASimple and fast operationAdjust verticalityBuilding material handlingEngineeringEccentric compression
The invention provides a rotating joint connecting device for a prefabricated component inclined strut and an application method. The rotating joint connecting device aims at solving the problems that when an inclined strut used for adjusting the perpendicularity is mounted through a PC component, the inclined strut is subjected to eccentric compression due to off position of pre-buried parts, and thereby mounting quality of the whole prefabricated component is influenced. The connecting device comprises an embedded plate, a 360-degree rotatable joint and a limiting component, the embedded plate is fixedly connected with the PC prefabricated component through embedding parts, the 360-degree rotatable joint is perpendicular to a prefabricated wall component or a prefabricated floorslab component and fixedly connected to the embedded plate, and the limiting component penetrates through the end of the inclined strut and is fixedly connected with the free end of the 360-degree rotatable joint. By means of the connecting device, hinge of joint positions can be achieved, and the situation that additional stress is generated to slabs and support bars is avoided. The application method comprises the following steps: 1, fixedly connecting the two ends of the inclined strut with the prefabricated wall component and the prefabricated floorslab component respectively; 2, rotating the inclined strut, so that the end of the inclined strut is perpendicular to the embedding parts.
Owner:SHANGHAI CONSTR NO 5 GRP CO LTD +2
Adjustable and detachable type large eccentric compression column testing device and method
ActiveCN109163979AAchieve fixationWith energy saving and emission reductionMaterial strength using tensile/compressive forcesSheet steelTest fixture
The invention discloses an adjustable and detachable type large eccentric compression column testing device and method. The device comprises a concrete column test piece, disassembly steel plates, loading steel plates, a pressure loading unit, a displacement testing unit, a strain gage, a static signal analysis system and a computer, wherein the concrete column test piece is positioned between theupper and lower loading steel plates of the pressure loading unit, the disassembly steel plates are mounted at two ends of the concrete column test piece, and the loading steel plates are mounted atthe other ends of the disassembly steel plates. The disassembly steel plates and the loading steel plates are mounted at two ends, the fixation effect of a bracket loading end is realized, the steel plates are detachably recycled, the testing device has the testing benefits of energy conservation, emission reduction and costing saving, and tested test pieces come from real working conditions, so that the testing data are reliable and true, and the range of application is wide.
Owner:JIANGSU OPEN UNIV
Eccentric compression column non-unloading strengthening testing device
InactiveCN103822832AMeet the test requirements for maximum pressure capacityAccurately measure the actual load sizeMaterial strength using tensile/compressive forcesEngineeringControllability
Owner:HUNAN UNIV OF TECH
Soil sample eccentric compression prevention strain control type direct shearing tester
PendingCN108344646AAvoid eccentric compressionPrevent eccentric compressionMaterial strength using steady shearing forcesEngineeringForce direction
The invention discloses a soil sample eccentric compression prevention strain control type direct shearing tester which comprises a shearing box, a vertical pressure application device, a horizontal pressure application device, a gauge and an instrument pedestal. The shearing box is formed by an upper shearing box and a lower shearing box; the instruction pedestal is provided with a limiting structure for limiting the upper shearing box to move along a horizontal pushing force direction and a rail for defining the lower shearing box to move on the surface of the pedestal along the horizontal pushing force direction; the vertical pressure application part comprises a vertical pressurization lever, a weight, a vertical pressurization frame, a pressurization rod and a pressure transfer cover;the horizontal pressure application device comprises a pusher and a steel ring; when the pusher is pushed by an external force, the lower shearing box is pushed to slide along the rail; the pushing force direction is consistent with the rail direction. According to the tester, the defect of soil sample eccentric compression of a conventional strain control type direct shearing tester is overcome,and accuracy and reasonability of strain control type direct shearing testing are improved.
Owner:CCCC FOURTH HARBOR ENG INST +1
Arch web type ultra-high performance concrete prefabricated shield tunnel segment structure and design method
ActiveCN112727500AExcellent stress relaxationReduce mis-stationGeometric CADUnderground chambersCrack resistanceArchitectural engineering
The invention relates to an arch web type ultra-high performance concrete prefabricated shield tunnel segment structure and a design method. The segment structure comprises a segment main body, wherein the segment main body comprises an arch crown, an arch web, an arch foot, a reinforcing mesh in concrete, a segment grouting hole and a segment joint groove, wherein the cross section of the arch web is of a cambered surface sheet-shaped structure, and the arch web has an arched longitudinal section. The method specifically comprises the following steps of 1), determining the thickness h1 of the arch crown and the thickness h2 of the arch foot; 2), calculating the bearing capacity of the normal section of the arch web area of the ultra-high performance concrete segment main body, and enabling the normal section of the arch web area to be equivalent to a rectangular section for reinforcement calculation; 3), rechecking of internal force of segment main body arch web area; and 4), comparing reinforcement results calculated according to the bearing capacity of the normal section of the flexural member with reinforcement results calculated according to the bearing capacity of the normal section of the large eccentric compression member, and selecting a scheme with a large reinforcement area for reinforcement. The method can solve the problem of poor crack resistance of the segment structure.
Owner:HUNAN UNIV
Test piece position fixing device in asphalt mixture local three-axis creep test
InactiveCN102109435AAvoid eccentric compressionEasy to disassembleStrength propertiesStructural engineeringMechanical engineering
The invention relates to a fixing device for accurately fixing the position of a mixture test piece in an asphalt mixture local three-axis creep test. The device can be formed by assembling two identical semicircular basic parts, wherein the internal diameter of a round side wall of each semicircular basic part is the same as the diameter of the mixture test piece, so that the mixture test piece just can be put into the device; the diameter of a through hole of a base plate is the same as that of a loading base, so that the base just can pass through the through hole; and the asphalt mixture test piece is put into the device, the base enters the through hole of the fixing device and contacts the bottom of the test piece, the fixing device is moved downwards, and is disassembled into the two semicircular parts and moved away after the bottom of the test piece is separated from the fixing device, and a pressure head is moved downwards to contact the upper surface of the test piece, so that the pressure head can be accurately loaded to the center of the test piece, and the accuracy of a test result is prevented from being influenced by the eccentric compression of the test piece.
Owner:SOUTHEAST UNIV
Upper disc eccentric compression type cylindrical machining device of cylindrical parts
ActiveCN103600285AHigh precisionImprove consistencyLapping machinesWork carriersOffset distanceEngineering
An upper disc eccentric compression type cylindrical machining device of cylindrical parts comprises an upper grinding disc, a holding frame and a lower grinding disc; the upper grinding disc is located above the lower grinding disc; the holding frame is located between the upper grinding disc and the lower grinding disc; a rotating shaft of the holding frame and a rotating shaft of the lower grinding disc are coaxially arranged; a determined offset distance is formed between a rotating shaft of the upper grinding disc and the rotating shaft of the holding frame; a load device acts on the upper grinding disc. The upper disc eccentric compression type cylindrical machining device of the cylindrical parts is high in accuracy and good in consistency.
Owner:ZHEJIANG UNIV OF TECH
Torque wrench
ActiveCN103448010ALarge signal release travelLow costSpannersWrenchesEngineeringUltimate tensile strength
The invention discloses a torque wench which comprises a wrench head assembly and a wrench body. The wrench head assembly is arranged at the upper end of the wrench body, an elastic assembly, a release mechanism and a torque resistance lever are sequentially arranged in the wrench body along the axial direction of the wrench body from bottom to top, the elastic assembly is connected with the release mechanism, the release mechanism is connected with the torque resistance lever, the front end of the torque resistance lever is connected with the wrench head assembly, and the torque resistance lever is connected with the upper end of the wrench body. The torque wrench has the advantages that by the aid of a rolling surface and a large-diameter bearing wheel without a support, unnecessary side load on a force spring can be reduced, the side load is generated due to eccentric compression of an existing bearing wheel, an action extension stroke for an impulsive signal can be provided under the condition that the yield strength of a compression spring is not surpassed.
Owner:上海欧唯斯工具制造有限公司
Continuous chain-type straight line drawing device
The invention discloses a continuous chain-type straight line drawing device, which comprises a drawing mold, eccentric compression mechanisms, a circulating chain transmission mechanism, a locking starting slide rail and a locking unlocking slide rail, wherein the eccentric compression mechanisms are arranged on a chain at intervals; and when deflector rods on the eccentric compression mechanisms penetrate through the locking starting slide rail and the locking unlocking slide rail, eccentric compression wheels are alternately in starting, locking and starting states due to pushing of the slide rails and pulling of a spring, and a drawing workpiece is stably, smoothly and uninterruptedly pulled out in a straight line type in cycles.
Owner:王俊
Eccentric compression type thin film sample holder
InactiveCN104694900AFirmly connectedAchieve insulationVacuum evaporation coatingSputtering coatingEngineeringVacuum chamber
The invention provides an eccentric compression type thin film sample holder, by means of the sample holder, it is facilitated that positive and negative eccentric compression is loaded to a magnetron sputtering film plating machine sample holder, and a sample can be rotated. The eccentric compression type thin film sample holder comprises a bracket, a bracket base, a metal bearing, a connecting rod and a vacuum chamber base. By utilizing the characters of the bearing, an inner ring of the metal bearing is fixed on the connecting rod of the bracket, meanwhile, an outer ring extracts an electrode, and the vacuum chamber base and the bracket base are separated from each other through the connecting rod. Therefore, the difficult problems of rotating the bracket and connecting the electrode are solved, and the insulation of the electrode and a machine case is achieved. By means of the eccentric compression type thin film sample holder, the bracket can be rotated, and meanwhile continuous eccentric compression can be applied to the bracket, the structure is simple, and the use is convenient.
Owner:LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
One-time multi-deformation measurement device for material mechanics experiment
InactiveCN103884589AEasy to operateImprove measurement efficiencyElectrical/magnetic solid deformation measurementStrength propertiesMeasurement deviceStrength of materials
The invention provides a one-time multi-deformation measurement device for a material mechanics experiment. The one-time multi-deformation measurement device comprises a base, a tensile rod piece, a compressed rod piece, an eccentrically compressed rod piece, an eccentrically tensile rod piece, a force sensor and a worm wheel force increasing mechanism device, wherein resistance strain foils are respectively adhered to points to be measured on the eccentrically tensile rod piece, the tensile rod piece, the compressed rod piece and the eccentrically compressed rod piece. According to the one-time multi-deformation measurement device for the material mechanics experiment, the resistance strain foils are connected with a resistance strain gauge to measure strain under a load. The device can realize simultaneous measurement on multiple deformations such as tension, compression, eccentric compression, eccentric tension, elastic modulus and the like of a measured object at a time; the device is simple in structure and easy to operate.
Owner:ANHUI AGRICULTURAL UNIVERSITY
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