33results about How to "Avoid lateral instability" patented technology

The invention relates to a method for performing an expansion test of combined loads on a solid expansion pipe, which comprises the following steps of: 1) preparing a sample and an expansion cone; 2) expanding an end part; 3) preparing an expansion test; 4) performing the expansion test, wherein the expansion test can be any one of the following tests: a, a mechanical stretching expansion test; b, a hydraulic expansion test; and c, a mechanical hydraulic combined expansion test; and 5) performing data acquisition and data analysis. In the method, the mechanical stretching expansion test or the hydraulic expansion test or the combined expansion test of mechanical stretching and hydraulic pressure is realized, and the displacement, speed, stretching loads and hydraulic pressure of the expansion cone and the radial deformation data of the solid expansion pipe in the process of the expansion test can be measured in real time by using axial controlled mechanical stretching loads and the hydraulic pressure and matching the corresponding expansion conical head. The invention provides a method for the expansion test for simulating actual working conditions in laboratories effectively for the detection of expansion performance and study evaluation of the solid expansion pipe and the study and improvement of a connecting structure of the expansion pipe.

The invention relates to a connection structure, in particular to a hinge connection structure and method for supporting steel columns on steel beams. The structure comprises the steel beams, the steel columns arranged above the steel beams and a connection plate arranged between the steel beams and the steel columns. The structure and the method have the following advantages and effects: the counter force at the bottoms of the steel columns is transferred to the direction of the strong axes of the steel beams by arranging the thickening connection plate with the same direction as a web of the strong axes of the steel beams and additionally arranging steel base plates avoiding lateral unstability of the connection plate; the node construction is simple and practical; the force is reliably transferred; the steel beams are reasonably stressed; the stability of the nodes are enhanced; waste of the beam sections is avoided; the investment is reduced; convenience is provided for construction; and the requirements of connection are well met.

The invention belongs to the field of bridge construction processes, is applied in the construction of a movable shuttering form for a cast-in-place box girder, and particularly relates to a construction process for the overhead back-up movement and dismantlement of a movable shuttering form after a cast-in-place box girder is completely constructed by the movable shuttering form. The process is characterized in that: a back guide girder, a main beam, a front guide girder, a bracket, a cart, an external mould plate, a mould plate beam, a middle beam and bracket tensioning fining twisted steel on both sides of the bride need to be removed; the cart transversely moves on the bracket to open the movable shuttering form, a winder is arranged on a concrete box girder, the external mould plate is removed by the winder and by the drawing and hoisting operation of a truck crane, the mould plate beam and the middle beam are removed from the top to the bottom in sequence, only the back guide girder, the main beam and the front guide girder remain, the main beam of the movable shuttering form is removed, and finally the last section of main beam and the front guide girder are moved. The process has the advantages of speeding up the construction, reducing construction equipment, guaranteeing the construction safety and lowering construction cost.

The invention discloses a synthesized pipe rack with a frame composite structure. The synthesized pipe rack comprises unit plate pieces positioned on the upper and lower surfaces, and side unit plate pieces positioned on two side surfaces; the unit plate pieces and the side unit plate pieces are combined and spliced to form unit pipe sections; the unit pipe sections are axially spliced to form the synthesized pipe rack; the unit plate pieces consist of plates, hollow second pipes positioned at two ends, and hollow first pipes positioned at the other two ends; the side unit plate pieces consist of plates, and hollow second pipes positioned at two ends; the second pipes are axial splicing ends of the unit pipe sections; and in splicing of the synthesized pipe rack, the first pipes form longitudinal beams of the synthesized pipe rack, and the adjacent second pipes are connected with each other to form a skeleton structure of the synthesized pipe rack. The longitudinal beams and the skeleton structure of the pipe rack bear main loads; a bridge steel web structure is formed to enhance the shearing resistance of the pipe rack, and is skillfully used; based on dual enhanced structures, the bearing capacity is greatly improved; and under the same filling height, wall plates with the structures are thinner, and materials are saved.

The invention discloses a seesaw type amplification type energy dissipation extending arm capable of preventing out-of-plane instability. The extending arm comprises an extending arm truss, an outer frame column, a seesaw type amplification device, a viscous fluid damper, a viscoelastic damper and out-of-plane instability preventing connecting steel plates. The seesaw type amplification device is hinged to the outer frame column through a left hinge point, and the seesaw type amplification device is hinged to the extending arm truss through a right hinge point; the seesaw type amplification device is respectively hinged with one end of the viscous fluid damper through the upper hinge point and the lower hinge point, and the other end of the viscous fluid damper is hinged with the extending arm truss; and the out-of-plane instability preventing connecting steel plates are fixed to the upper end and the lower end of the outer frame column and fixedly connected with the viscoelastic damper, and the viscoelastic damper is fixedly connected with a pin shaft of the upper hinge point or the lower hinge point. The energy dissipation extending arm is high in feasibility, the key technical problem of an existing energy dissipation extending arm with an amplifying device is solved, and the energy dissipation and shock absorption effects and the capacity of coordinating deformation of an inner cylinder and an outer frame are superior to those of an existing technical scheme.

The present invention belongs to the field of tooling design, and particularly relates to a web beam structure anti-destabilization clamper under a fatigue shear load effect. The web beam structure anti-destabilization clamper comprises a bracket 9, rollers 7 and clamping plates 10, wherein one end of the bracket 9 is the clamping end and the other end is the sliding end, the sliding end is connected to the rollers 7 through ball hinges 8, the clamping ends are fixedly connected to a web beam structure 11 from both sides, and the clamping plates are tightly matched with the rollers 7 from both sides, such that the clamping effect is provided for the whole clamper.

The invention discloses a three-axle bogie. A driving device of the bogie comprises a motor, wherein a transmission shaft of the motor is connected with a pinion through a coupler; the exterior of the pinion is meshed with a gearwheel that is mounted on a hollow shaft; the hollow shaft is rotatably mounted at the outer part of the axle of the bogie in a sleeving way; the exterior of the hollow shaft is connected with a driving disc; the driving disc is connected with wheel pairs through force transmission pins; and a driving device is elastically suspended on the frame of the bogie through a motor suspension device. The driving device with the structure can simply and reliably drive the wheel pairs. The structure further facilitates the elastic suspension structure between the motor and the frame, enables most of the transverse inertia and the shaking inertia of the driving device to be decoupled with the whole frame, is beneficial to improve the transverse dynamics performance of the bogie, and avoids a transverse unstable phenomenon of the bogie.

The invention discloses a buckling-restrained steel frame beam column connecting structure, and belongs to the technical field of building structures. The structure comprises an I-shaped steel column, an I-shaped steel beam and a buckling-restrained connecting part; the I-shaped steel column and the I-shaped steel beam are connected through the buckling-restrained connecting part; the buckling-restrained connecting part comprises buckling-restrained channel steel, side buckling-restrained channel steel and an energy dissipater; arc-shaped groove openings are formed in the side edges of an upper flange plate and a lower flange plate of energy dissipater I-shaped steel respectively; the buckling-restrained channel steel is arranged on the upper side and the lower side of the energy dissipater I-shaped steel respectively; the buckling-restrained channel steel is arranged on the two sides of a middle web of the energy dissipater I-shaped steel respectively; and arc-shaped base plates matched with the arc-shaped groove openings are arranged at the arc-shaped groove openings. According to the buckling-restrained steel frame beam column connecting structure, lateral instability of a steel beam is avoided, the seismic energy dissipation property of a joint is improved, and the seismic capacity is greatly improved.

The invention discloses a metal roof wind-resistant clamping piece. The metal roof wind-resistant clamping piece comprises a clamping piece body, an anti-disengagement part is arranged in the middle of the clamping piece body, and an anti-deformation part is arranged at the bottom of the clamping piece body. The invention further discloses a metal roof wind-resistant clamp, the wind-resistant clamp comprises two wind-resistant clamping pieces which are oppositely arranged, the two wind-resistant clamping pieces are oppositely arranged, and the anti-deformation parts of the two wind-resistant clamping pieces are located on the opposite sides of the two wind-resistant clamping pieces respectively; an anti-disengagement area matched with a lock catch is formed between the anti-disengagement parts of the two wind-resistant clamping pieces, the two wind-resistant clamping pieces are connected and fixed through bolts, and the bolts are located above the anti-disengagement area. The inventionfurther discloses a metal roof wind-resistant system and a composite roof system. The metal roof wind-resistant clamping piece, clamp and system disclosed by the invention have the advantages that the tripping problem and the fulcrum lateral instability problem caused by deformation of the metal roof can be effectively prevented; the temperature stress (thermal expansion and cold contraction) inthe length direction of the plate surface can be effectively released; and the stress conduction of the fulcrum can be effectively increased when the roof system is composited, and the fulcrum lateralinstability is prevented.

The invention relates to the technical field of arrangement of steel structure roof support, and discloses a built-up connection structure and a built-up connection method for roof support and I-steel purlins. The built-up connection structure is provided with a plurality of steel roof truss structures and a plurality of roof support structures which are connected into a net-shaped connection structure. Each steel roof truss structure comprises a steel roof truss upper chord and a purlin which are perpendicularly connected in a cross mode. Four corners of the panel point where each purlin is connected with each steel roof truss upper chord are connected with a roof support rod in an inclined mode through a structural steel piece and a connecting plate. Each roof support structure comprises a connecting beam and a purlin which are perpendicularly connected in an overlapped mode. Four corners of the panel point where each purlin is connected with each connecting beam are connected with the roof support structure in an inclined mode through a connecting plate. According to the built-up connection structure and the built-up connection method for the roof support and the I-steel purlins, the purlins can concurrently serve as pressure levers so as to prevent the roof upper chords from being unstable along the side direction. Meanwhile, the purlins and the connecting beams can further and concurrently serve as tie bars of the roof support. The area of the roof support is divided into sizes with good economical efficiency and applicability. The built-up connection structure is convenient to arrange, simple in structure, easy to machine and low in manufacture and machining cost.

The invention discloses a bearing type motion decoupling vertical vibration isolation device, which is characterized by comprising a vertical vibration isolation mechanism, a connecting and fixing mechanism, an anti-instability mechanism, a positioning mechanism and a motion decoupling mechanism, wherein the vertical vibration isolation mechanism is a core mechanism, located in the center of the whole device and responsible for providing vertical self-adaptive rigidity characteristics needed by vibration isolation; the whole device plays a role in connection and bearing through the connectingand fixing mechanism, the top and the bottom of the connecting and fixing mechanism are fixed to the structure, and meanwhile, the top, the bottom and the vertical vibration isolation mechanism located in the middle realize the transmission and bearing of a vertical force; the anti-instability mechanism and the positioning mechanism are arranged around an elastic element in the vertical vibrationisolation mechanism and are matched with each other to guarantee the stability of the performance of the vertical vibration isolation mechanism; the motion decoupling mechanism is arranged on the waist portion of the whole device and matched with the connecting and fixing mechanism to achieve decoupling of vertical motion and horizontal motion. The problems of instability and eccentricity of a vertical vibration isolation system are comprehensively solved.

The invention discloses a direction-adjustable ratchet wheel type self-locking movable joint which comprises a movable end, a fixed end and a direction-adjustable ratchet wheel mechanism. The movableend mainly comprises a movable end flange, a movable end rib plate, a movable end steel pipe, a movable end embedded steel pipe, movable end wing plates and a rack. The movable end rib plate is arranged between the movable end flange and the movable end steel pipe, and the movable end wing plates are symmetrically arranged on the two sides of the movable end steel pipe. One side of the fixed end steel pipe is provided with an opening, the movable end embedded steel pipe is embedded in the side, and the other side is coaxially connected with the fixed end flange. Fixed end wing plates are symmetrically arranged on the two sides of the opening end of the fixed end steel pipe and correspond to the movable end wing plates. The ratchet wheel is engaged with the rack, and movement of the rack can drive the ratchet wheel to rotate. A direction-adjusting handle is arranged outside the fixed end steel pipe, and a connecting rod penetrates through the fixed end steel pipe and a spring in the fixed end steel pipe to connect the ratchet and the direction-adjusting handle. The movable joint is simple and convenient in structure, free of redundant accessories, capable of being self-locked, convenient to erect and disassemble and capable of bearing pressure and tension at the same time.

The invention relates to a T-shaped beam dismantling method. Fixing pieces are installed on the two sides of a damaged T-shaped beam; a bridge body between the damaged T-shaped beam and other T-shaped beams is cut, and the damaged T-shaped beam is kept stable; a stabilizing piece is installed on the side face, facing the bridge body, of the damaged T-shaped beam, the length direction of the stabilizing piece is consistent with that of the damaged T-shaped beam, and the length of the stabilizing piece is larger than or equal to that of the damaged T-shaped beam; a connecting piece is arranged on the damaged T-shaped beam, the two ends of the connecting piece are connected to the two opposite side faces of the stabilizing piece respectively, and the connecting piece abuts against the side face, opposite to the stabilizing piece, of the damaged T-shaped beam; and the damaged T-shaped beam is hoisted, and dismantling is completed. The structure stability of the damaged T-shaped beam is guaranteed, stress between the stabilizing piece and the damaged T-shaped beam can be stable and uniform in the hoisting process, lateral instability or further damage in the hoisting process is avoided, and the stability and safety of the T-shaped beam dismantling method are improved.

The invention relates to the field of installation or transportation of large-scale buildings, in particular to an early warning system for out-of-plane instability in sliding construction of an inverted triangular truss type roof. The early warning system is characterized by comprising a load adjustment subsystem (1), a slip unit lateral instability identification and stabilization subsystem (2) and a computer acquisition control subsystem (3). According to the early warning system, through the combined action of the load adjusting subsystem (1), the sliding unit lateral instability identification and stabilization subsystem (2) and the computer acquisition control subsystem (3), lateral instability of a sliding unit in the sliding process is effectively avoided, synchronous deviation correction in the sliding process is achieved, and smooth implementation of a sliding construction scheme is guaranteed; and the system has the biggest characteristic that the problem of lateral instability in the sliding process of the large-span inverted triangular truss type roof sliding unit is solved on the premise that the structural form of the sliding unit is not specially treated.

The invention discloses a connecting structure of a wind turbine generator cabin and a dry-type transformer. The connecting structure comprises a cabin base, the dry-type transformer, a first elastic supporting piece, a box transformer substation base and a cable-stayed assembly. The bottom of the dry-type transformer is connected with a cabin base through a first elastic supporting piece and a box transformer substation base, a support is arranged on the cabin base, the top of the dry-type transformer is connected with the top of the support through a cable-stayed assembly, and installation of the dry-type transformer in a wind turbine generator cabin is completed. According to the connecting structure of the wind turbine generator cabin and the dry-type transformer, the top and the bottom of the dry-type transformer are both flexibly connected with the cabin through the elastic supporting pieces and the cable-stayed assemblies, connection and fixation of the dry-type transformer and the cabin are achieved, and a certain flexible adjusting space can be provided for the dry-type transformer; therefore, the dry-type transformer can work safely, reliably and stably in a dynamic environment of a cabin.