34results about How to "Reduce shear deformation" patented technology

The invention discloses an anchored roadbed widening method, which belongs to the technical field of road construction. The anchored roadbed widening method comprises the following steps of: firstly performing slope cutting on an old roadbed slope, then excavating a step on the old roadbed slope from the ground, obliquely drilling an anchorage hole into an old roadbed at the joint of the vertical plane of the step and the horizontal plane, placing a steel bar into the anchorage hole, and casting the steel bar and the old roadbed into a whole by pouring cement grout; laying a new roadbed in layers, rolling, flatly laying a geogrid on the step of the old roadbed when the new roadbed is filled to be aligned with the step of the old roadbed provided with the anchorage drilled hole, connecting a transverse rib of the geogrid with an end hook which is bent upwards of the exposed part of the steel bar, tensing the geogrid, fixing with the lower layer of a soil body, and finally filling soil on the geogrid and rolling. According to the anchored roadbed widening method disclosed by the invention, an anchor rod technology is used for reinforcing the old roadbed slope, the geogrid and the old roadbed are connected into a whole, the geogrid can be prevented from sliding on the step of the old roadbed, the stability of the new roadbed and the old roadbed is improved, and non-uniform sedimentation can be effectively controlled.

The present invention discloses a rubber composition used for coating steel wire cords of radial ply tyres, which comprises: 1) a rubber component containing natural rubber, or the natural rubber and cis-butadiene rubber, or the natural rubber and butadiene styrene rubber, or the natural rubber, the cis-butadiene rubber and the butadiene styrene rubber; and 2) an adhesion system comprising 0.5 to6 weight portions of triazine adhesive, 5 to 20 weight portions of white carbon black and organic acid cobalt salt with 0.03 to 1 weight portion of cobalt which take 100 weight portions of the rubbercomponent as a reference. On the basis of 100 weight portions of the rubber component, the rubber composition also comprises various auxiliary agents. The rubber composition used for coating the steel wire cords of the radial ply tyres has good viscosity, liquidity and penetrability, is not only suitable for the steel wire cords of ordinary all-steel load or all-steel engineering radial ply tyres, but also particularly suitable for large-diameter steel wire cords of which the diameter is larger than 2 millimeters.

A lift belt (12) for a lift installation comprises a belt body (15) in which a tensile carrier arrangement (14) with several tensile carriers (14.1, 14.2) for transmission of a tension force in longitudinal direction of the lift belt is arranged. A profile body (16) which spaces these tensile carriers from one another is arranged between adjacent tensile carriers (14.1, 14.2) of the tensile carrier arrangement (14). <SDOCL LA=EN> 12 Claims 1. Lift belt (12) for a lift installation, with a belt body (15) in which a tensile carrier arrangement (14) with several tensile carriers (14.1, 14.2) in the form of strands or cables for transmission of a tension force in longitudinal direction of the lift be lt is arranged, characterised in that a profile body (16) is arranged between adjacent tensi le carriers (14.1, 14.2) of the tensile carrier arrangement (14) and spaces these tensil e carriers from one another. 2. Lift belt according to claim 1, characterised in that a respective profil e body (16) is arranged between several, preferably between all, tensile carriers of the tensile carrier arrangement (14). 3. Lift belt according to claim 2, characterised in that all profile bodies (16) have the same cross-sectional shape. 4. Lift belt according to claim 2, characterised in that at least two profil e bodies (16) have different cross-sectional shapes. 5. Lift belt according to any one of the preceding claims, characterised in that a profile body has a substantially circular, oval (16.1), T-shaped, double-T-shaped (16.3), U- shaped, triangular or quadrangular (16.2) cross-section. 6. Lift belt according to any one of the preceding claims, characterised in that a profile body extends in longitudinal direction ofthe lift belt (12), particularly substantially over the entire lengthof the lift belt. 7.

The invention relates to the technical field of rubber, in particular to a rubber composition for a tire bead ring. The rubber composition is characterized by being prepared from the following raw materials in parts by weight through mixing: 0-40 parts of natural rubber, 60-100 parts of butadiene styrene rubber, 5-40 parts of high styrene resin, 60-120 parts of carbon black, 0-15 parts of reinforcing phenolic resin, 3.0-5.0 parts of zinc oxide, 1.0-3.0 parts of stearic acid, 5-15 parts of tackifying resin, 0.5-1.5 parts of protecting wax, 15-25 parts of sulphur powder, 10-25 parts of softening oil, 0.8-1.5 parts of an accelerant DM and 0.1-0.2 part of an accelerant DPG. According to the rubber composition, under the condition that the structure of the tire bead ring keeps unchanged, the adhesive force of the bead ring modulus and coating is improved, and the problems of tire wiredrawing explosion, bead hollowness and bead break are solved.

The invention discloses a coarse ring-free aluminum alloy bar. The coarse ring-free aluminum alloy bar is prepared from the following components in percentage by weight: 0.62 to 0.7 percent of Si, 0.3 to 0.4 percent of Fe, 0.2 to 0.35 percent of Cu, 0.1 to 0.15 percent of Mn, 0.9 to 0.98 percent of Mg, 0.15 to 0.25 percent of Cr, 0.25 percent of Zn, 0.06 to 0.13 percent of Ti and the balance of Al. According to the coarse ring-free aluminum alloy bar disclosed by the invention, the addition range of Cr and Mn elements is strictly controlled on the basis of 6061 aluminum alloy specified in the national standard GB/T3191-2010, and the Cr and Mn elements have a function of inhibiting grain expansion in the aluminum alloy; the temperatures of a die, a cast ingot and an extrusion container can be controlled during a follow-up extrusion process, so that the shear deformation of a material during extrusion is reduced; an arc-shaped die bearing is adopted, so that the material flowing dead zone of an extrusion die is reduced; by using the produced 6061 aluminum alloy bar, a coarse ring cannot be fundamentally seen, the mechanical performance of a material and the oxidation performance of a product are greatly increased, the color of the material is consistent after an anode is oxidized, and the coarse ring-free aluminum alloy bar has no defects of piebaldness and the like.

A precision shearing die of rod material for press is composed of upper and lower die plates, upper and lower fixed cutter carriers, upper and lower cutting blades, and the upper and lower clamp units consisting of clamping block, clamping spring, screw bolt and fixed block.

The invention belongs to the technical field of industrial civil structures, and relates to a high-performance toughness structural system comprehensively applying seismic solation and energy dissipation seismic absorption technologies to improve anti-seismic performance of a plant. The anti-seismic toughness plant structural system comprehensively adopting seismic isolation and absorption technologies comprises a large-mass-ratio tuning mass damper and an energy dissipation sub-frame which are connected to a plant main structure. Buckling-restrained braces are adopted to replace parts of ordinary steel supporting components, and the damper is adopted on a structural floor with large horizontal relative displacement to replace an ordinary supporting structural system so as to achieve the effect of energy dissipation seismic absorption; a coal hopper of the plant is subjected to seismic isolation design through a seismic isolation support, the adopted seismic isolation support is optimally calculated, and thus movement of the coal hopper under the seismic effect and movement of the main body structure are tuned to form the large-mass-ratio tuning mass damper; and the anti-seismic toughness plant structural system can be applied to structural design and seismic reinforcement of the high seismic intensity field underground plant, and can also be applied to other similar industrial structures.

An optical fiber micro bent displacement sensor, which contains light source, optical fiber coupler, Y type optical fiber, integral distortion device, optical micro bent distortion device, two optical rings, two pretension screw and optical power meter. Said invention adopts separated integral distortion device and optical fiber micro distortion device, can design the rigidity and strength of integral distortion according to need for adapting different frequency and amplitude signal measurement.

The invention discloses a cellular connection steel plate-double-limb steel pipe concrete composite column, comprising a steel pipe concrete limb part 1, a steel pipe concrete limb part 2, a steel connection plate 1 and a steel connection plate 2, wherein two ends of the steel pipe concrete limb part 1 and the steel pipe concrete limb part 2 are respectively connected with each other through the steel connection plate 1 and the steel connection plate 2 to form a battened steel column; the steel connection plate 1 and the steel connection plate 2 are cellular connection plates with holes in the centers; the steel connection plate 1 and the steel connection plate 2 are respectively composed of two steel plates which are the same in shape and are provided with gaps in the edges; and the two steel plates are welded through a butt weld joint to form the cellular connection plate. According to the cellular connection steel plate-double-limb steel pipe concrete composite column, the mechanical behavior is improved, and the stability performances of a real axis and a virtual axis are fully approximate, so that the materials in the directions of two principal axes can bring into full play, the steel consumption is lowered, and the comprehensive cost of engineering is reduced.

The invention discloses a four-limb steel column for connection of cellular connection plates. The four-limb steel column for connection of cellular connection plates comprises a steel tube limb I, a steel tube limb II, a steel tube limb III, a steel tube limb IV, a steel connection plate I, a steel connection plate II, a steel connection plate III and a steel connection plate IV, wherein the steel tube limb I, the steel tube limb II, the steel tube limb III and the steel tube limb IV are connected together through the steel connection plate I, the steel connection plate II, the steel connection plate III and the steel connection plate IV to form a rectangular section column; the steel connection plate I, the steel connection plate II, the steel connection plate III and the steel connection plate IV are cellular connection plates, the middles of which are provided with holes; the steel connection plate I, the steel connection plate II, the steel connection plate III and the steel connection plate IV are respectively formed by two steel plates which are provided with gaps at the boundary zones and of the same shape; every two steel plates are welded through butt welds to form each cellular connection plate. The four-limb steel column for connection of cellular connection plates is capable of improving the stress property of the latticed columns and improving the rigidity and the buckling strength of the steel columns in a relatively economic manner.

The invention provides a manufacturing method for a large-diameter austenitic stainless steel thick-wall pipe, and belongs to the technical field of stainless steel machining. The manufacturing method includes the steps of integration of an electric furnace, AOD and centrifugal casting, hot rolling, homogenized heat treatment, primary cold rolling, structure regulation heat treatment, finished pipe cold rolling, solid solution heat treatment and the like. A large-wall-thickness centrifugal casting hollow pipe blank is used as a billet pipe, so that the manufacturing procedure of a billet pipe is omitted, and the yield is increased. The uniformity of the structure and performance in the pipe wall thickness direction is improved through high-temperature homogenized heat treatment of the hot-rolled pipe blank, and the deformation uniformity in the wall thickness direction in the follow-up cold rolling deformation process is improved. Through structure regulation annealing heat treatment and the pinning effect of the second phase, the cold-rolled pipe blank with the uniform and fine grain structure is obtained, so that the large-diameter thick-wall finished pipe with the grain size being higher than the 4.0 level is obtained. Furthermore, the finished pipe is rolled through a superlarge-diameter roller, the better uniform deformation in the wall thickness direction is achieved, and thus the large-diameter thick-wall finished pipe with the grain size being higher than the 5.0 level is obtained.

The invention discloses a connecting joint for self-compaction wedge-shaped spliced type pressure-bearing type high-strength bolts. A wedge-shaped screw of the connecting joint and a wedge-shaped screw with a nut are each provided with a certain number of gaskets. When the bolts are screwed down and pre-tension force is exerted, pressing force is generated between contact surfaces of connected plate pieces, and the bolts are tensioned axially, so the wedge-shaped screw and the wedge-shaped screw with the nut relatively slide, the actual diameter of the bolts is accordingly increased, the gaps,in the tension direction of the connected plate pieces, between reserved bolt holes and the bolts are filled. After the connected plate pieces are connected, the gaskets should make sectional weakened sections of the screws located on the upper side and the lower side of upper and lower spliced plates respectively, so the non-sliding connecting joint suitable for steel structure connecting partsfor bearing the reciprocating load effect in the tension direction of the connected plate pieces is formed.

The invention belongs to the technical field of bridge engineering, and relates to a steel-wood combined bridge deck structure and a paving method thereof. The steel-wood combined bridge deck structure comprises a steel bridge deck slab, a plurality of U-shaped ribs are evenly distributed and fixed to the bottom end of the steel bridge deck slab, the adjacent U-shaped ribs are arranged at intervals, and a plurality of wood laths are further evenly distributed and fixed to the upper surface of the steel bridge deck slab; the adjacent wood laths are arranged at intervals, and asphalt concrete is laid between the adjacent wood laths and on the upper sides of the adjacent wood laths. Through the structural design, the bridge deck has a certain buffering effect, fatigue damage to the steel bridge deck is reduced, and the asphalt concrete is fixed through the wood laths, so that interlayer separation caused by insufficient interlayer bonding force can be prevented; as the wood laths are relatively flexible materials, a part of shear deformation can be absorbed, and the shear deformation of the bridge deck caused by vehicle braking can be effectively reduced.

The invention provides a well cementing device for controlling shear deformation of casing pipes. The well cementing device comprises a concentric pipe column, a first packer, a second packer and a control valve system. The concentric pipe column comprises the inner casing pipe and the outer casing pipe. The first packer is connected to the upper end of the concentric pipe column. First through holes are formed in the side wall of the first packer. The second packer is connected to the lower end of the concentric pipe column. Second through holes are formed in the side wall of the second packer. The control valve system comprises a first control valve and a second control valve. The well cementing device for controlling shear deformation of the casing pipes is provided with a first workingstate of sealing a first liquid inlet by the first control valve, a second working state of opening the first liquid inlet by the first control valve, a third working state of opening the first liquid inlet by the first control valve and sealing a second liquid inlet by the second control valve and a fourth working state of opening the first liquid inlet by the first control valve and opening thesecond liquid inlet by the second control valve. The well cementing device for controlling shear deformation of the casing pipes is capable of reducing the shear deformation of the casing pipes.

The invention discloses a cellular connection steel plate-four-limb concrete filled steel tube composite column which comprises a steel tube limb I, a steel tube limb II, a steel tube limb III, a steel tube limb IV, a steel connection plate I, a steel connection plate II, a steel connection plate III, a steel connection plate IV and concrete, wherein the steel tube limb I, the steel tube limb II, the steel tube limb III and steel tube limb IV are connected together through the steel connection plate I, the steel connection plate II, the steel connection plate III and the steel connection plate IV to form a rectangular section column; the steel tube limb I, the steel tube limb II, the steel tube limb III and steel tube limb IV are internally filled with the concrete; the steel connection plate I, the steel connection plate II, the steel connection plate III and the steel connection plate IV are respectively formed by two steel plates which are provided with gaps at the boundary zones and of the same shape; every two steel plates are welded through butt welds to form each cellular connection plate. According to the cellular connection steel plate-four-limb concrete filled steel tube composite column, the materials in two main shaft directions can be fully developed, so that the dosage of the steel is reduced and the comprehensive cost of the projects is lowered.