889 results about "Bolted joint" patented technology

The invention discloses a dual-sliding shaft floatation supporting mechanism of an omnibearing movable AGV (Automatic Guided Vehicle), wherein a Mecanum wheel is fixed on a motor shaft; two annular ball bearings are arranged at two ends of the motor shaft and then are arranged in bearing seats; the two bearing seats are arranged on a bracket by virtue of locating of two locating pins; two sliding shafts are fixed on the bracket by virtue of bolted joint; two sliding linear bearings with flanges are fixed on fixing plates by virtue of screws; two rectangular helical springs are arranged at the lower parts of the sliding shafts; and two sliding shafts penetrate through the two sliding linear bearing with the flanges and are locked up. The dual-sliding shaft floatation supporting mechanism ensures that the Mecanum wheel rotates freely in the vertical direction and floats so as to realize the floatation support in the vertical direction, so that when a road surface is uneven, the Mecanum wheel can not be contacted with the ground and idle or can not idle while being slightly contacted with the ground, and simultaneously the vibration during the Mecanum wheel traveling process can be weakened, and the traveling direction accuracy and movement stability of the AGV can be greatly improved.

The invention belongs to the field of civil engineering technology, and particularly relates to a bolted steel filling plate-sleeve connection node for a beam-post wood structure. The connection node comprises a wood beam, a wood post, a steel filling plate, a sleeve, a bolt, a gasket and a nut. The the beam-post connection node is formed by inserting steel filling plates in grooves of the wood beam and the wood post, the sleeve is embedded in the bolt hole on the beam-post connection node; after the bolt passes through the sleeve, the sleeve is pressed by the gasket through a stretch-draw bolt, so that the sleeve pushes against the steel filling plates to generate larger pressure, friction generated by pressure is utilized for shear resistance and the increasing and decreasing of pressure stress is utilized for bending resistance. The connection node is definite in force transfer and convenient for construction, and gaps at the nodes almost have no influence on the load-carrying property and rigidity of the structure; in addition, the introduction of the sleeve can also prevent the local bearing damage of the wood below the gasket and reduce the contact pressure stress at the bolt of the wood beam (post), thus being beneficial to the exertion of strength of the wood. Compared with the existing connection mode, the connection node of the beam-post wood frame has large and stable bending-resistant rigidity.

A steel beam and concrete wall semi-rigid full-bolted-connection joint comprises a reinforced concrete wall body (1), an H-shaped steel beam (2), web plate angle steel (5), upper and lower flange angle steel (6), a bolt (7) and a bolt (8). A tailored embedded part is arranged in the reinforced concrete wall body (1) and consists of reinforcement connectors (9), two steel plates (3), a plurality of straight anchor bars (4) and L-shaped anchor bars (12), the sizes of the two steel plates are identical, the steel plates are vertically placed on two sides of a reinforcement cage, the straight anchor bars (4) are welded between the two steel plates (3), at least eight circular holes (11) are drilled on one of the steel plates (3) and are arrayed to form two rows, each reinforcement connector (9) is arranged in the corresponding circular hole (11) by means of plug welding, the reinforcement connectors (9) are connected with the L-shaped anchor bars (12) between the two steel plates (3), and the H-shaped steel beam (3) is connected with the tailored embedded part by the web plate angle steel (5), the upper and lower flange angle steel (6), the bolt (7) and the bolt (8).

The invention provides a large autoclaved lightweight aerated concrete slab. The large autoclaved lightweight aerated concrete slab comprises 5 to 9 autoclaved lightweight aerated concrete panels and two pieces of channel steel, wherein the two pieces of channel steel are arranged at an interval; the side edges of adjacent two autoclaved lightweight aerated concrete panels are connected with each other through a connecting rod; and the connecting rod is connected with the channel steel through a bolt. The installation method comprises the following steps of: (1) temporarily fixing the two pieces of channel steel on a working platform, connecting adjacent autoclaved lightweight aerated concrete panels by using the connecting rod and fixing the connecting rod on the channel steel through the bolt so as to form the large autoclaved lightweight aerated concrete slab; (2) repairing a slab joint (3) between adjacent autoclaved lightweight aerated concrete panels, moving the large slab to a corresponding position and fixing the channel steel and an angle steel accessory on a main steel structure through a bolt; and (4) repairing the slab joint of the large autoclaved lightweight aerated concrete slab. Due to the integral hoisting of the large autoclaved lightweight aerated concrete slab, the work amount of high-altitude operation is reduced, splicing work and hoisting work can be performed at the same time and working efficiency is improved greatly.

The invention discloses a double-layer steel sheet pile soil core composite cofferdam structure without an inner support and the application of the double-layer steel sheet pile soil core composite cofferdam structure without an inner support, and belongs to the field of water conservancy projects. The double-layer steel sheet pile soil core composite cofferdam structure without an inner support comprises an upstream-face steel sheet pile and a downstream-face steel sheet pile, and the space between the steel sheet piles is filled with cohesive soil to form a cofferdam; a composite geo-membrane is laid on the portion, inside the cofferdam, of the upstream-face steel sheet pile; the upper portions of the two steel sheet piles are connected through a pull rod, middle beams are arranged outside the steel sheet piles, and the pull rod is connected with the middle beams through bolts arranged outside the corresponding middle beams. When the filling cofferdam core cohesive soil is in the same level with the pull rod, the space between the steel sheet piles is further filled with a layer of hairy residues, and a sub-cofferdam is arranged on the upstream-face steel sheet pile. The cofferdam structure can be used for building strip-shaped subsurface structures in a river or lake through the open-cut method. The cofferdam structure is stable and safe, and the problem that a steel sheet pile flexible structure is large in deformation is solved by arranging the pull rod on the tops of the two steel sheet piles; a three-level waterproofing system improves the anti-penetrability performance of the steel sheet pile cofferdam significantly.

A method and apparatus for controlling distortion in the casing of a gas turbine are disclosed. The method uses a split in the flange ID underneath “false” flanges to tune the hoop stiffness of the casing to match the stiffness and behavior of the bolted joint. By matching the hoop carrying capability and load path of the split-line flange, as well as the thermal mass effect, the distortion can be channeled to a higher order distortion mode that can evenly distribute the deflection and approach a pure circular form.

The present invention discloses an experimental method for characterizing relaxation characteristics of a bolted joint structure. The method comprises: constructing a finite element model of a singlebolted joint test piece based on the obtained three-dimensional rough shape of the contact surface of the bolted joint structure; performing static strength analysis on the single bolted jointed testpiece by using ANSYS software, and drawing the deformation curve of the single bolted jointed test piece under load conditions; making a single bolted joint axial test piece and a tangential test piece to analyze the influence law of the axial external load and the outward shear load on the relaxation characteristics of the bolted joint structure; establishing an experiment platform, and through the cyclic load control software, applying a cyclic load with a certain frequency on the single-bolt test piece clamped on the fatigue testing machine; performing the modal test on the single bolted joint test piece by using the LMS vibration system at the same time interval; and extracting a clamp force signal output by a pressure sensor and a stiffness signal in the modal test, and fitting the curve for the clamp force signal and the stiffness signal for comparison. The method disclosed by the present invention provides technical support for the relaxation determination and refastening of thejoint bolts of the key precise complicated components.

The invention discloses constraint type assembly compound concrete-filled steel tubular column and steel beam joints provided with reinforcing blocks. The constraint type assembly compound concrete-filled steel tubular column and steel beam joints provided with the reinforcing blocks fall into crossed joints, T-shaped joints, straight joints and L-shaped joints. Each joint comprises a compound concrete-filled steel tubular column, a first beam end connector, a second beam end connector, the first reinforcing block and the second reinforcing block, wherein the first beam end connector and the second beam end connector are each formed by welding a beam end cover board, a beam end connection board and two beam end reinforcing ribs, a second bolt hole is formed in the beam end connection cover board, a first bolt hole is formed in the beam end connection board, the first reinforcing block and the second reinforcing block are each formed by welding a piece of channel steel and a reinforcing block connection board, second bolt holes are formed in two sides of the channel steel, and a third bolt hole is formed in the other side of the channel steel. All the joints are connected through bolts completely, traditional stud welded connection is abandoned, construction and installation are convenient, the constraint pressure function is formed for concrete in the columns, and the joints can be detached and replaced.

The invention relates to a method for analyzing dynamic characteristics of a bolted structure based on a three-dimensional fractal theory. Modern industries rapidly develop; therefore, requirements on the machining precision of a machine tool are also increasingly high; but, the contact quality of a joint part between machine tool parts has a great influence on the machining precision of the machine tool; researches show that 60-80% of the total rigidity and 90% of the total damping of the machine tool come from the joint part; but, the integral rigidity and damping of the machine tool determine the machining precision of the machine tool; and thus, the theoretical basis can be provided for researching the integral dynamic performance of the machine tool by accurately estimating the contact rigidity and damping of the joint part. For a bolted joint surface, in combination with MATLAB numerical value simulation software and ANSYS finite element analysis software, a method for estimating the dynamic performance of the bolted joint surface is provided based on a three-dimensional fractal surface and a contact rigidity and damping model built by considering the influence of an elastoplastic deformation stage simultaneously.

The invention relates to a submarine pipeline buckling preventing device, and a manufacturing method and a mounting method thereof. The device comprises two annular thick-wall shells, wherein the two sides of each shell are symmetrically extended to form an elongated eye plate respectively. The two shells are integrated by bolts. Concrete pressure blocks with horseshoe-shaped sections are poured outside the shells in the eye plates on the two sides. Two vertical anchor plates and two oblique anchor plates are symmetrically welded on the two sides of each shell along the length directions of the concrete pressure blocks. The upper parts of all the anchor plates are poured in the concrete pressure blocks. The device provided by the invention can be applied to unburied submarine pipelines arranged at seat bottom and greatly reduces the ditching and pipeline burying cost. The device, and the manufacturing method and the mounting method thereof effectively control the buckle propagation of the submarine pipelines, enhance the positioning stability of the submarine pipelines, and realize the uniformity of economy and safety.

The invention discloses a general drop-proof parallel groove clamp and belongs to the technical field of power devices. The problem that a cable clamp in the prior art is small in usage range and high in maintenance cost and makes a cable easy to drop is solved. The general drop-proof parallel groove clamp comprises an upper clamping plate, a lower clamping plate, a bolt and clamping assemblies, wherein the upper clamping plate and the lower clamping plate are connected through a bolt to form a whole, a clamping cavity is formed between the upper clamping plate and the lower clamping plate, an upper clamping body and a lower clamping body which are serially connected with the bolt together are arranged in the clamping cavity, and the clamping assemblies are arranged at two ends of the upper clamping plate. Free clamping space control is achieved by utilizing matched usage of a first movable device and the second movable device, so that the cable clamp is suitable for different sizes of cables and a usage range of the cable clamp is widened, and meanwhile the tightness and stability of cable connection are improved.

The invention discloses a seam tracking device with double tracking probes, and relates to a seam tracking device. The seam tracking device comprises a box body, bolt connecting blocks, displacement sensors, guide rod connectors, sensor mounting flanges, an upper box cover, springs, adjusting bolts, spring hooks, probe fixing bolts, the tracking probes, guide rods, a cantilever beam, a rolling bearing and a shaft sleeve, wherein the cantilever beam is arranged on the inner wall of the box body; two guide rods are arranged on the cantilever beam; through holes are formed in the centers of the two guide rods; two springs are arranged on each of the left and right parts of the guide rods; and the tail ends of the springs are connected to the adjusting bolts through the spring connecting blocks and the spring hooks. Inclination angles of the guide rods are adjusted by screwing and unscrewing left and right nuts, so that the two tracking probes at the tail ends of the two guide rods cling to the inner wall of a seam. The displacement sensor connected to the upper ends of the guide rods is used for processing deviation information through a singlechip microcomputer, and controlling an executor to correct a deviation between the trajectory of a welding gun and the seam, so that the tracking accuracy and reliability are improved, the working efficiency is improved, and the cost is reduced.

Improved bolted joint designs are used for a joint between a bolt-on load-lifting member such as a fork or clamp arm and a carriage or carrier associated with a material handling device. In various embodiments, an elongate rear vertical shank of one or the other of the load-lifting member or the carrier may have a plurality of mounting bolt holes spaced longitudinally along its length, each mounting bolt hole extending from a respective recessed area formed in one or both of the joined surfaces. Each bolt hole has a respective bolt-hole width dimension transverse to the elongate member, and each recessed area has a recess width dimension parallel to and greater than the bolt-hole width dimension.

The invention relates to a beam-column joint connecting device for a multi-story/high-rise assembly type steel structure system, and belongs to the technical field of structural engineering. The device comprises beam end box type connecting pieces, vertical connecting channel steel, upper column flanges, lower column flanges, truss beam end upper and lower chord members, a joint short column lower-end flange, a joint short column and a join short column upper-end flange, wherein the beam end box type connecting pieces, the joint short column, the joint short column upper-end flange and the joint short column lower-end flange can be welded into a whole in a factory; two pieces of vertical connecting channel steel and the truss beam end upper and lower chord members are welded into a whole in the factory; and the two pieces of vertical connecting channel steel are connected with the beam end box type connecting pieces through bolts. Welded parts of the joint connecting device can be finished in the factory, and are assembled in situ by the bolts, the fastening work of the bolts is convenient and quick, the construction speed is greatly increased, the construction quality is greatly improved, and the device is adapted to the development of an assembly type steel structure; and in addition, a joint is a rigid joint, and is high in ductility and bearing capacity.

The invention provides an anti-overturning reinforcement system for single-column pier bridges, which comprises a steel structure support, a steel connecting base, and rigid tie rods; the steel structure support comprises two semicircular hoops with cantilevers, and the surface, which is in contact with a pier, of each semicircular hoop is provided with reserved holes for the mounting of anchor bolts at intervals; the external surfaces of the semicircular hoops are provided with axial reinforcing ribs; the two semicircular hoops are connected through first high-strength bolts to hoop both sides of the pier, and the semicircular hoops and the cantilevers are of an integrated structure; one end, which is far from the hoop, of each cantilever is provided with a vertically through mounting through hole; the steel connecting base is fixed on the bottom of a bridge, the center of the steel connecting base and the center of the through hole are on the same vertical line, and both ends of eachrigid tie rod are respectively fixedly connected to the steel structure support and the steel connecting base. The invention can effectively enhance the anti-overturning performance of a single-column pier bridge, the structure is simple, stress is clear, construction is convenient, the anti-overturning reinforcement system has relatively good economical efficiency and appearance, and the invention is suitable for popularization and application in the field of bridge reinforcement.

A system and method for statistically analyzing a structural member design is provided to obtain a probability that the structural design will meet predetermined design criteria. The present invention provides for numerous spreadsheets, interrelated by way of a macro, to performing statistical analysis on a design, wherein one spreadsheet accepts design input variables. The design input variables are then evaluated by a number of recommended design criteria. If the design fails to meet the recommended design criteria, the user can establish the design (e.g., optimize it in one embodiment) using the optimization spreadsheet. The optimization spreadsheet established the structural member design by automatically adjusting various design inputs so that the structural member design satisfies as many design criteria as possible. Once the desired design input values are discovered, a probability spreadsheet uses random data points to calculate the probability that the structural member design will fail to meet the design criteria.

The invention relates to a building component used for node angle displacement limitation and shock absorption, in particular to an angle-adjustable fan-shaped lead viscoelastic corner damper, and belongs to the field of structure engineering. The angle-adjustable fan-shaped lead viscoelastic corner damper mainly solves the problem that the existing fan-shaped lead viscoelastic corner damper component is only limited to be used at a 90-degree angle beam post node position and is difficult to adapt to the modern building structure form diversification. The angle-adjustable fan-shaped lead viscoelastic corner damper comprises a composite elastic body and two connecting plates, wherein the composite elastic body consists of elastic bodies, shearing steel plates, a cylindrical lead core and angle regulating steel plates; the elastic bodies and the shearing steel plates are alternately laminated; the cylindrical lead core transversely passes through the shearing steel plates and the elastic bodies; the shearing steel plates arranged at the outer side are connected with the angle regulating steel plates through screw bolts; and each elastic body, each shearing steel plate and each angle regulating steel plate are all in a fan shape concentric with the composite elastic body. The angle of the damper can be regulated into four different values, and the angle-adjustable fan-shaped lead viscoelastic corner damper is applicable to building structures with various angles.

A locking element for locking in a bolted joint, the locking element comprising one side comprising a pattern of radially extending cams, the main surface of which having a helix configuration, the pitch of the cams exceeding the pitch of the threads involved in the bolted joint. The locking element is especially characterized in that the locking element is a washer intended to be applied as a single locking element in the joint and in that the other, the opposite, side of the washer comprises mechanical means for providing a locking action for preventing rotation between said other side and a surface against which said other side is intended to act. The invention also relates to a bolted joint.