774 results about "Bolted joint" patented technology

Provided in the present invention is a new connecting and fixing structure suitable for precast columns. The new connecting and fixing structure comprises a lower-layer precast column, an upper-layer precast column and an L-shaped fixing bracket, wherein a column cap connected to a frame beam is provided at the top of the lower-layer precast column; a cup-mouth-shaped recess is formed in the top of the column cap; the upper-layer precast column is fixed to an upper surface of the column cap by means of the L-shaped fixing bracket; a reinforcing bar at the bottom of the upper-layer precast column extends into the cup-mouth-shaped recess and is in lap joint with a reinforcing bar at the top of the lower-layer precast column; the edge of a gap between the upper-layer precast column and the column cap is blocked with blocking mortar; fine aggregate concrete with one grade higher than the concrete grade of a precast column is poured in the cup-mouth-shaped recess to a floor level elevation; the gap between the upper-layer precast column and the column cap is filled with a grouting material; and upper surfaces of the upper-layer precast column and the column cap are both connected to the L-shaped fixing bracket by means of bolts, and threaded sleeve metal members fitting with the bolts are pre-buried in the upper-layer precast column and the column cap. Further provided in the present invention is an implementation method for the new connecting and fixing structure suitable for precast columns.

The utility model provides a prestressed corrugated steel plate reinforced shield segment structure. The prestressed corrugated steel plate reinforced shield segment structure comprises an arch crown corrugated steel plate, a left side arch shoulder corrugated steel plate, a right side arch shoulder corrugated steel plate, a left side haunch corrugated steel plate, a right side haunch corrugated steel plate, a left side bracket, a right side bracket, a ballast bed steel plate, a hinge bolt, a prestressed steel strand, a prestressed tension support and a prestressed anchorage device. Every two adjacent arc-shaped corrugated steel plates are connected through a hinge bolt, prestressed tension supports are symmetrically arranged on the two sides of a joint of the corrugated steel plates, prestressed steel strands are anchored to the two ends of the supports through single-hole prestressed anchorage devices, and all the corrugated steel plates are connected to form a collaboratively stressed whole. The steel corbel at the bottom of the reinforcing structure provides reliable support for the upper corrugated steel plate. The shield segment is light in weight, large in out-of-plane rigidity, high in buckling resistance, easy to produce and machine and convenient to construct and install, the bearing capacity and deformation resistance of the shield segment structure are remarkably improved by applying prestress to the arc-shaped corrugated steel plates, and convergence deformation of the segment is restrained.

The utility model relates to a bridge high pier steel bar binding jig frame based on a stiff framework, which comprises two longitudinal beams arranged in parallel, at least three cross beams are welded between the tops of the two longitudinal beams at equal intervals, two ends of each cross beam are respectively welded with a strip-shaped vertical plate, and a strip-shaped toothed plate is movably arranged on each vertical plate along the vertical direction. The outer sides of the toothed plates are connected with the vertical plates through bolts, a plurality of main reinforcement clamping openings are formed in the inner sides of the toothed plates at equal intervals, and a plurality of main reinforcement positioning grooves are formed in the top face of each cross beam in the transverse direction at equal intervals. The pier body reinforcement cage can be horizontally spliced and formed on the ground section by section, a stiff framework is used as a reinforcement cage lifting support, the reinforcement cage is vertically lifted to an installation position, and pier body reinforcement installation efficiency can be greatly improved.

The utility model relates to an assembled integral type steel plate composite shear wall which comprises a plurality of wall exterior steel plates which are sequentially spliced from bottom to top. Wall filling concrete is vertically inserted into the wall exterior steel plate, at least one end of the wall filling concrete is narrowed and sequentially forms a retraction part and an extension part, the retraction part is located in the wall exterior steel plate, and a containing cavity is reserved between the retraction part and the wall exterior steel plate; the extending part is positioned outside the wall exterior steel plate; in the two up-and-down adjacent spliced wall exterior steel plates, the extending part of each wall interior filled concrete extends into the containing cavity of the other wall exterior steel plate and is engaged with the retracting part of the other wall interior filled concrete in a staggered manner; and the retraction part, the extension part and the side wall of the steel plate outside the wall are respectively provided with corresponding through holes and are connected through high-strength bolts. Assembly can be completed without on-site welding and concrete pouring, and the construction difficulty is lowered.

The invention relates to the technical field of reinforcing steel bar node reinforcement, in particular to a modular reinforcing steel bar node reinforcement method, which comprises the following steps: S1, carrying out field investigation and node analysis, recording the conditions of the existing node, including the diameter, spacing and corrosion degree of a reinforcing steel bar, carrying out accurate measurement by using a laser scanner, and simulating the stress state of the node by using ANSYS or SAP2000; determining positions and degrees of nodes needing to be reinforced; s2, standardized modularized steel bar assemblies are designed and machined, the steel bar materials are HRB500, the specifications are 12 mm, 16 mm and 20 mm, the module width is 300 mm, the length is 500 mm, standardized connectors are connected through bolts or quick connecting plugs, the size error is controlled to be + / -1 mm, epoxy coating or hot galvanizing is adopted for rust prevention treatment, and the coating thickness is larger than or equal to 100 micrometers; s3, a node area needing to be reinforced is cleaned, a surface rusted and loosened concrete layer is removed, and a structural layer is exposed; the modularized steel bar assemblies and the standardized construction process are adopted, the construction efficiency is improved, and the site construction period and the labor cost are reduced.

The invention discloses a composite material four-nail connection structure strength prediction and bolt layout optimization method based on a physical information neural network, and belongs to the technical field of composite material design. The method comprises the following steps: carrying out simulation modeling and verification on the composite material four-nail connection structure; generating and expanding a basic data set; constructing and training a physical information neural network model; performing system calibration and verification on the prediction precision and generalization ability of the physical information neural network model by using experimental data; and constructing a composite material four-nail connection structure bolt layout automatic optimization framework, and outputting optimal bolt layout parameters. According to the method, the problem of physical unreasonable prediction of a pure data driving model in a data sparse region is solved, efficient collaborative optimization under geometric constraints of bolt spacing, edge distance and the like is realized, a complete closed loop from rapid strength evaluation to automatic layout optimization is realized, and the design efficiency and reliability of a composite material four-nail connection structure are improved.

The utility model discloses a sand blasting mechanism with a buffer structure, which comprises a sand blasting box, a sliding frame is arranged on the rear side of the upper end of the sand blasting box, the front end of the sliding frame is in bolted connection with a sand blasting head, a threaded screw rod penetrates through the front end of the sliding frame, the right side end of the threaded screw rod is connected with a power motor, and a positioning plate is arranged in the middle of the sand blasting box. Limiting columns penetrate through the corners of the positioning plate, a clamping plate is connected to the upper end of the positioning plate, a screening box is arranged at the bottom end of the sand blasting box, a discharging hopper is fixedly connected to the right side end of the screening box, and a collecting box is arranged at the lower end of the discharging hopper. According to the sand blasting mechanism with the buffering structure, spraying materials can be recycled and screened in the sand blasting operation process of workpieces through the screening structure, the operation convenience is improved, meanwhile, due to the arrangement of the buffering structure, pressure can be absorbed and buffered when the sand blasting force is too large, the workpieces subjected to sand blasting are protected, and the service life of the workpieces is prolonged. And the damage or damage condition of the workpiece caused by overlarge sand blasting pressure is prevented, and the reject ratio is reduced.

The utility model relates to a novel double steel plate concrete composite wall structure for a bridge tower, which comprises a shear wall system, two ends of the shear wall system are connected with steel-concrete composite columns through high-strength bolts, and the shear wall system comprises two wall steel plates which are arranged in parallel. A plurality of longitudinal partition plates are erected between the two wall body steel plates at intervals in the length direction of the wall body steel plates, the longitudinal partition plates are vertically and fixedly connected to the two wall body steel plates, a plurality of round lightening holes are formed in the longitudinal partition plates, and in-wall concrete is poured between the two wall body steel plates and the longitudinal partition plates. Longitudinal partition plates with lightening holes are arranged in the shear wall system to serve as stiffening ribs, and long studs serve as connecting pieces of a wall steel plate and concrete in the wall, so that the wall can be divided into a plurality of cavities, the construction form is simple, the stress of the connecting pieces is clear, the material consumption is reduced, and the construction cost is reduced. And the strength, ductility, corrosion resistance and fireproof performance of the structure are enhanced.

The invention relates to a butterfly wing type mechanical pre-stressed anchor rod and a construction method thereof.The anchor rod comprises an anchor rod body and a butterfly wing assembly, and the butterfly wing assembly is arranged outside the front end of the anchor rod body and comprises a hinge rib plate, a spring, a bolt and a butterfly wing-shaped barb component; the hinged rib plate is fixed outside the front end of the anchor rod body, the butterfly wing-shaped barb component sleeves the hinged rib plate and is connected with the hinged rib plate through a bolt, and the spring is mounted at the joint; the butterfly-wing-shaped barb component is arranged in the length direction of the anchor rod body, the rear end of the butterfly-wing-shaped barb component tilts outwards, and when the anchor rod body moves backwards, the butterfly-wing-shaped barb component clamps surrounding rock and is limited to move. On the basis of an original common anchor rod, the disc wing type structure is additionally arranged, the effective length of the anchor rod is increased, the anchoring length of the front end of the anchor rod is reduced, and the utilization efficiency of the anchor rod is improved. Meanwhile, pretension force can be applied according to needs, deformation of the stratum is restrained, and the safety of the structure is improved.

The utility model relates to the field of metal processing, and discloses a combined turning tool capable of adjusting a cutting angle for metal processing, which is characterized in that a worm wheel shaft is arranged in a tool bar main body, the worm wheel shaft is connected with a front end and a rear end, a tool bit is arranged at the front end, and a worm and gear mechanism is arranged at the rear end; the cutter head rotates through an axis rotating bolt, a connecting hole is formed in one side of the cutter head, the cutter head is fixedly connected with the cutter holder, the indexable blade is installed on the cutter holder and connected with the fastening screw, the fastening screw makes contact with the pressing plate, a first threaded hole is formed in the lower surface of the cutter head, and a second threaded hole is formed in the lower surface of the cutter head. And the fastening bolts are connected with the first threaded holes to fix the cutter heads and the cutter head. According to the utility model, the cutting edge inclination angle of the indexable blade can be effectively changed through the worm and gear mechanism, the cutting edge angle of the indexable blade can be effectively changed through the rotation and fixation of the cutter head, the two cutter holders are arranged on the cutter head, the processing efficiency is improved, and through the design, the effect of conveniently adjusting the angle is achieved, and different cutting angle requirements can be met; the method is applied to machining field.

The invention relates to an anti-leakage pyrolysis high-temperature solid material conveying device, and belongs to the technical field of high-temperature solid material conveying. The shell is axially and horizontally placed on the supporting platform; an inlet flange is arranged at the top of the shell, and an outlet flange is arranged at the bottom; the double-chamber leakproof seal is mounted at the axial left end of the shell; the shaft penetrates through the double-chamber leak-proof seal and then extends into the inner cavity of the shell from the left end of the shell; the two bearing seats are fixedly connected to the upper surface of the supporting platform through bolts; the axial outer end of the shaft is supported by two bearing seats; the rotary joint is mounted at the outer end part of the shaft; the access hole is formed in the top of the shell; wear-resistant castable is attached to the inner wall of the access hole, the inner wall of the inlet flange, the inner wall of the outlet flange and the inner wall of the shell; blades are mounted on the outer wall of the shaft extending into the inner cavity of the shell; the transmission part is sleeved on the outer wall of the outer end of the shaft; the high-temperature working condition can be borne when garbage pyrolysis solid materials are conveyed, meanwhile, long-distance material returning in the horizontal direction is achieved, and the garbage pyrolysis material returning problem is solved.

The invention belongs to the field of aircraft structure design, and particularly relates to a stiffened wall plate butt joint structure and a design method. The structure comprises a first stiffened wall plate and a second stiffened wall plate, wherein the first stiffened wall plate comprises a first skin and first ribs arranged on the first skin; the second stiffened wall plate comprises a second skin and a second rib arranged on the second skin; wherein the first skin and the second skin are connected through bolts; the first rib and the second rib are connected through a butt joint assembly. The rib butt-joint areas and the skin butt-joint areas are arranged in a staggered mode, and the two rib butt-joint areas are located on the two sides of the skin butt-joint areas correspondingly. The multi-path force transmission butt joint mode is adopted, the skin and the ribs are in scattered butt joint, continuous structural rigidity and continuous load transmission are kept, large stress concentration and weight cost are avoided, and fatigue details at the butt joint position are facilitated.

The present application relates to a kind of pyrolysis high-temperature solid material conveying device of leakage prevention, belong to high-temperature solid material conveying technical field;Shell is placed axially horizontally on support platform;The top of shell is provided with import flange, bottom is provided with export flange;Double-chamber leakage prevention seal is installed in the axial left end of shell;Shaft passes through double-chamber leakage prevention seal and then from the left end of shell extends into the inner cavity of shell;2 bearing seats are fixed on the upper surface of support platform by bolt connection;The axial outer end of shaft is supported by 2 bearing seats;Rotary joint is installed in the outer end of shaft;Access hole is arranged in the top of shell;Access hole inner wall, import flange inner wall, export flange inner wall, shell inner wall are attached wear-resistant castable;The outer wall of the part of shaft extending into the inner cavity of shell is installed blade;Transmission part is sleeved on the outer wall of the outer end of shaft;The present application can withstand high-temperature working condition when conveying garbage pyrolysis solid material, while long-distance material return in horizontal direction is realized, and the problem of garbage pyrolysis material return is solved.

The utility model relates to the technical field of assembly type steel structure connection, and particularly discloses an assembly type steel structure joint which comprises an I-shaped steel stand column, an I-shaped steel beam and a connecting structure used for connecting and fixing the I-shaped steel beam and the I-shaped steel stand column. The connecting structure comprises a bottom connecting plate connected with the I-shaped steel stand column through bolts and a steel frame fixedly connected to the outer side of the bottom connecting plate, the end of the I-shaped steel beam stretches into the inner side of the steel frame and is connected with the steel frame through bolts, and the two inner sides of the steel frame are further connected with side supporting structures used for supporting the inner walls of the two sides of the I-shaped steel beam through bolts. The connecting structure solves the problems that a connecting structure of a traditional assembly type steel structure joint does not shield and protect the connecting position of a steel beam and a steel column, and the connecting position of the steel beam and the steel column can be rusted in the long-term use process.

The invention discloses a fabricated connection node of an existing reinforced concrete column and a newly-added steel beam, which comprises four steel end plates mounted around the existing reinforced concrete column through anti-shearing pieces, the steel end plates are connected through transverse connecting pieces and first high-strength bolts, and a cantilever beam is welded on each steel end plate; in addition, the invention further provides a construction method of the fabricated connection joint of the existing reinforced concrete column and the newly-added steel beam, and the fabricated connection joint connected with the newly-added steel beam is installed on the existing reinforced concrete column. By means of the modular design, the steel beam and concrete column assembly type connecting structure meets the reinforcement and transformation requirements of steel beams and concrete columns of different specifications and types, the construction efficiency is remarkably improved, the complexity of field welding operation is effectively reduced, the stress performance of assembly type connecting joints is excellent, the anti-seismic ductility is improved, and the construction cost is reduced. The method is suitable for anti-seismic reinforcement and function transformation projects of existing structures.

The invention relates to the field of oil well exploitation equipment, in particular to an energy-saving and environment-friendly casing head which comprises a casing head body, a flange connector, a slip body, a slip bowl and a stop mechanism, and the top of the casing head body is connected with the flange connector through a plurality of bolts; an annular assembling groove is formed in the inner wall of the casing head body, and an inverted-cone-shaped bearing face with the wide upper portion and the narrow lower portion is arranged at the bottom of the annular assembling groove. The slip bowl is arranged in the annular assembling groove, and the inverted-cone-shaped pressing face at the bottom of the slip bowl is in press fit with the inverted-cone-shaped bearing face. The slip body is arranged in the slip bowl, and the lower outer conical surface of the slip body is pressed on the inner conical surface of the slip bowl; the casing head body is connected with a stop mechanism, and the inner end of the stop mechanism abuts against the slip body in a matched mode. The bottom of the flange connector abuts against the stop mechanism in a matched mode. The casing head body and the flange joint are designed into a detachable structure, so that any part can be conveniently replaced when damaged, undamaged parts can be continuously utilized, energy is saved, the environment is protected, and waste is reduced.

The invention discloses an H-shaped steel full-bolt assembly suspended dome structure system and a construction method thereof. The H-shaped steel full-bolt assembly suspended dome structure system comprises an upper single-layer latticed shell system, a lower cable supporting system and a support. The upper reticulated shell is formed by splicing a center module unit and an outer ring module unit through high-strength bolts, the module units are connected with H-shaped steel Z-shaped bolt joints through welded hollow balls, and the joints achieve quick positioning of rod pieces and triple bolt connection through Z-shaped cantilever ends. The lower cable support system comprises a full-bolt connection spherical hinge universal adjustable cable support node, hinge joint is achieved through a spherical hinge assembly, the prestress of an annular cable is adjusted through a cable clamp assembly, and a radial cable is connected with adjacent units. The support is in bolted connection with the ring beam base through a Z-shaped cantilever end. During construction, parts are prefabricated in a factory and positioned through full-bolt assembly jig frames on site, assembly is conducted according to the sequence of expanding from the center to the outside, and the jig frames are dismantled after ring cables are tensioned in a graded mode. The structure achieves whole-process non-welding assembly, construction is efficient, green and low-carbon, joint damage is controllable, repairing is convenient and fast, cable force adjustment is accurate, and the structure is suitable for intelligent construction of the large-span space steel structure.

The formwork-free high-ductility concrete constructional column formwork comprises a first high-ductility concrete prefabricated part and a second high-ductility concrete prefabricated part, the first high-ductility concrete prefabricated part and the second high-ductility concrete prefabricated part are arranged on the front side and the rear side of a constructional column correspondingly, and a first reserved hole and a second reserved hole are formed in the first high-ductility concrete prefabricated part and the second high-ductility concrete prefabricated part correspondingly; the fastening device comprises a first base plate, a second base plate, a fastening bolt, a split screw and a PVC sleeve, the PVC sleeve sequentially communicates with the first reserved hole and the second reserved hole, the two ends of the PVC sleeve are connected with the first base plate, the split screw penetrates through the first base plate and is arranged in the PVC sleeve, the split screw is connected with the fastening bolt, the second base plate is arranged between the fastening bolt and the first base plate, and the PVC sleeve is connected with the second base plate. The high-ductility concrete is adopted for manufacturing the prefabricated part, the fastening device is matched to serve as a constructional column formwork, the complex mounting and dismounting procedures of a traditional formwork are avoided, and the construction efficiency is improved; and meanwhile, the high-ductility concrete is used as a castable to prepare the constructional column, so that the shear bearing capacity of the wall body and the anti-seismic property of the brick masonry wall are improved.

The invention discloses a ring rib sleeve and elastic device collaborative assembly type hollow sphere joint and a reinforcing method, and belongs to the technical field of steel structure reinforcing. The invention innovatively provides a reinforcing system composed of a node area ring sleeve assembly, a rod piece rib ring sleeve assembly, an elastic connecting device and a high-strength bolt. The joint area rib ring sleeve is designed in a split mode, a closed ring rib-shaped sleeve is formed through opposite penetrating connection of high-strength bolts, and the joint of a joint and a rod piece is accurately wrapped with the closed ring rib-shaped sleeve. The rod piece rib ring sleeve also adopts a split type design, forms a ring rib-shaped sleeve through high-strength bolt connection, and forms a continuous force transmission path with the node area sleeve through flange connection; the elastic connecting device adopts a prestress loading mechanism, continuous pressing of a node contact face is achieved through a belleville spring set, an adjustable elastic constraint interface is formed, the node stress distribution state is effectively improved, and dynamic displacement is absorbed. The method is particularly suitable for performance improvement and reconstruction engineering of spherical nodes in a large-span space structure.

The invention discloses a dustproof and cooling environment-friendly steel cutting machine, and belongs to the technical field of steel cutting machines, the dustproof and cooling environment-friendly steel cutting machine comprises a working plate and a motor, the lower surface of the working plate is fixedly connected with a support, and the upper surface of the working plate is in bolted connection with a left connecting plate; the motor is in bolted connection with the left side surface of the left connecting plate, and the output end of the motor is fixedly connected with a threaded rod; and the transition shaft is fixedly connected to the outer side surface of the right connecting plate. When the environment-friendly steel cutting machine capable of preventing dust and cooling works, a workpiece is placed on the working plate, the motor is started, the motor drives the transmission shaft and the cutting blade to rotate, meanwhile, the motor is also started, the motor drives the movable block and the cutting blade to move towards the front side of the working plate through the threaded rod, cutting work is completed, and meanwhile, a spray head can do reciprocating circular motion; when the spray head works, the dust falling effect is achieved, dust is prevented from scattering all around, the working efficiency is optimized, and the body health of workers is guaranteed.

A method for extracting extended stress of thread tooth contact surface belongs to the field of bolt connection and finite element simulation, and includes the following steps: step 1: determining the theoretical formula of normal stress and shear stress of any contact surface of thread; step 2: calculating the direction cosine of the external normal; step 3: establishing a thread tooth contact surface model in finite element; step 4: extracting the extended stress of the thread tooth bevel; step 5: importing the extended stress into the original finite element mesh model according to the mesh node coordinates to obtain the extended stress distribution. The present invention can apply theoretical calculation to finite element simulation, provide great help for stress analysis of thread pair, and can be applied to stress analysis calculation of any other connection interface.

The utility model discloses a welding pipeline butt joint auxiliary device which comprises two butt joint tools which are symmetrically arranged, each butt joint tool comprises a machine box and a mass block which is arranged on the machine box in a sliding mode in the length direction, a tool table is installed on each mass block, an inserting groove is formed in the end portion of each tool table, and a positioning base is installed in each inserting groove in an inserted mode. A lower half groove penetrating in the length direction is formed in the positioning base, a cover plate is hinged to one end of the positioning base through a hinge, an upper half groove corresponding to the lower half groove is formed in the lower end of the cover plate, the other end of the positioning base is connected with the cover plate through a first bolt, a servo motor is arranged in the machine box, and a gear is arranged at the shaft end of the servo motor. And the upper part of the gear extends to the outside through a strip-shaped opening formed in the case and is meshed with a toothed rail groove formed in the bottom of the mass block. According to the welding pipeline butt joint auxiliary device, two pipelines needing to be welded can be stably in butt joint, and the positioning base is installed in an inserted mode and can be conveniently replaced according to different pipeline specifications.

The invention discloses a fabricated bridge pier column construction ladder cage, and belongs to the technical field of bridge construction equipment. The construction platform structurally comprises four groups of rectangular stand columns, assembling plates are circumferentially arranged outside the stand columns, the left sides and the right sides of the stand columns are connected with inclined supporting frames through bolts, a bottom flange is detachably connected with a left front stand column internally provided with a hollow structure, and a motor driving lead screw and a guide rod linkage sleeve block are arranged in the bottom flange to drive the construction platform to vertically ascend and descend. Expanding inserting plates are inserted into the two sides of the construction platform, width adjustment is achieved through limiting bolts and spring mechanisms, anti-skid rubber pads are laid on the surface of the platform, and reinforcing beams are arranged at the bottom. According to the assembly type bridge pier column construction ladder cage, the stand columns are connected with the inclined supporting frames through bolts, the construction ladder cage can be integrally hoisted to the designated position of a pier column, and the construction ladder cage can be reused after being dismantled; and a motor drives a lead screw to achieve lifting of the construction platform, and the manual climbing risk is avoided.

The present invention relates to the field of oil well mining equipment, and more specifically, to an energy-saving and environmentally friendly casing head, comprising: a casing head body, a flange joint, a slip body, a slip seat, and a stop mechanism. The top of the casing head body is connected to the flange joint via a plurality of bolts. The inner wall of the casing head body is provided with an annular assembly groove, and the bottom of the annular assembly groove is provided with an inverted conical bearing surface that is wide at the top and narrow at the bottom. The slip seat is seated in the annular assembly groove, and the inverted conical pressure surface at the bottom of the slip seat is pressed onto the inverted conical bearing surface. The slip body is seated in the slip seat, and the lower outer conical surface of the slip body is pressed onto the inner conical surface of the slip seat. The casing head body is connected to a stop mechanism, and the inner end of the stop mechanism abuts against the slip body. The bottom of the flange joint abuts against the stop mechanism. The casing head body and the flange joint are designed to be detachable, so that they can be replaced when any component is damaged, thereby allowing the undamaged component to continue to be used, saving energy and protecting the environment, and reducing waste.

The invention relates to a local movable type inner support steel sheet pile cofferdam and a construction method, and the construction method comprises the steps of inner support splicing, inner support lowering, steel sheet pile inserting and driving, layered water pumping and support mounting, outer ring beam mounting, pile head breaking and removing, bearing platform and pier body construction and the like. The transverse connector and the inclined connector release bending moment to profile steel to be dismantled through hydraulic jacks in the transverse connector and the inclined connector, the dismantling difficulty of the inner support is reduced, a positioning and lowering device used for bearing the inner support is installed on a steel casing and an auxiliary steel casing, and the outer ring beam and the inner ring beam form an opposite-pulling state. And the water level regulator is mounted on the steel sheet pile through the connection of the flexible joint and the flange plate. The method has the advantages of being high in construction efficiency, low in steel sheet pile deformation, fast in inner support installation and convenient in inner support system conversion, and good technical and economic benefits can be obtained when the method is applied to actual engineering.

The invention relates to a rope-driven joint flexible mechanical arm measurement experiment platform which comprises a workbench, a controller fixedly connected to the top of the workbench, a first fixing plate and a second fixing plate fixed to the top of the workbench, a datum plate fixed to the side edge of the rear end of the second fixing plate, a threaded hole formed in the first fixing plate, and a welding block connected to the first fixing plate. A second electric telescopic rod is fixed to the front side of the welding block, a tension sensor is fixedly connected to the front end of the second electric telescopic rod, a connecting fixing clamp is fixed to the front end of the tension sensor, a first wiring disc assembly is connected to the second fixing plate through a circular hole bolt, and a connecting rod is movably connected to the first wiring disc assembly; the connecting rod is movably connected with a second wiring disc assembly, the second wiring disc assembly is fixedly connected with one end of a driving rope, and the fixing clamp clamps the other end of the driving rope. According to the invention, the motion posture and the deflection angle of the mechanical arm joint as well as the corresponding length and tension data of the driving rope can be obtained through testing.

The invention relates to the technical field of supporting structures, and discloses a prefabricated steel-concrete combined supporting structure and a design and construction method thereof. Comprising an outer steel pipe, an inner steel pipe, ultra-high performance concrete, an inner ring plate, an outer ring plate, high-strength bolts, stiffening ribs, steel bar connectors, embedded steel bars, joint square steel plates, U-shaped joint steel bars, cast-in-place concrete joint beam reinforcing bars, a cast-in-place concrete beam, bolt holes and joint steel bar welding spots. The outer steel pipe and the inner steel pipe are large and small circular steel pipes which are concentrically arranged, ultra-high performance concrete is poured between the outer steel pipe and the inner steel pipe to form a body of the prefabricated support, and the multiple sections of supports are connected through the inner ring plate, the outer ring plate and the high-strength bolts, the steel bar connectors, the embedded steel bars, the joint square steel plates, the joint steel bars and the cast-in-place concrete joints form connecting joints of the prefabricated supports. Compared with a traditional reinforced concrete support, the steel-concrete combined support has the higher mechanical property, is detachable, convenient to construct and environmentally friendly.

The utility model relates to a tower crane holding tile connecting structure, and belongs to the technical field of tower cranes. Comprising a standard knot lower joint, a standard knot upper joint, a holding tile I and a holding tile II, a hinge I is arranged on the standard knot lower joint, a hinge II is arranged on the holding tile I, a hinge III is arranged on the holding tile II, and the hinge II and the hinge III are connected with the hinge I through connecting rods. The holding tile I and the holding tile II are fixedly connected with the standard knot lower connector and the standard knot upper connector through bolts. The standard knot lower joint and the standard knot upper joint are provided with grooves matched with the holding tile I and the holding tile II, and the holding tile I and the holding tile II can be clamped into the standard knot lower joint and the standard knot upper joint through the grooves. The utility model has the beneficial effects that the traditional tower body standard knot mounting method is eliminated, the holding tile is initially mounted to the outer side of the lower joint, frequent mounting and dismounting are not needed, and the mounting efficiency is improved. And the hinge design is adopted, so that the holding tiles can be rotationally opened and closed, the flexibility is higher, and the application range is wider.

The utility model discloses an inner mold for pouring well lid base concrete of an inspection well. The inner mold comprises a cylindrical mold plate and a demolding turn buckle. The inner diameter of the cylindrical formwork is matched with the inner diameter of a shaft of the inspection well, and the height of the cylindrical formwork is larger than that of a well lid base. The cylindrical template is formed by assembling three arc-shaped steel plates with the same height and the same radian; one end of the first arc-shaped steel plate is connected with one end of the second arc-shaped steel plate through two hinge mechanisms, and the other end of the first arc-shaped steel plate and the other end of the second arc-shaped steel plate are connected with the two ends of the third arc-shaped steel plate in a one-to-one correspondence mode through plug pin mechanisms. And the demolding turn buckle is connected between the height middle part of the first arc-shaped steel plate and the height middle part of the second arc-shaped steel plate, is positioned on the inner diameter line of the cylindrical template, and is vertical to the connecting line of the butt joint ends of the first arc-shaped steel plate and the second arc-shaped steel plate and the axis of the cylindrical template. The utility model is convenient to disassemble and assemble, and can be recycled.

The utility model discloses a spiral wringing machine which comprises a feeding box, a wringing box, a discharging box and a spiral shaft transversely arranged in a penetrating mode, a dewatering screen is connected to the spiral shaft in a sleeved mode, a front connecting end and a rear connecting end are arranged at the two ends of the spiral shaft respectively, and the tail end of the front connecting end and the tail end of the rear connecting end are installed on the feeding box and the discharging box through bearings respectively. An inner sealing cover and an outer sealing cover are arranged at the connecting position of the front connecting end and the front end wall of the feeding box, the inner sealing cover comprises an inner pressing connection part and an inner inserting cylinder, the inner pressing connection part is in pressing connection with the inner side of the front end wall of the feeding box, the inner inserting cylinder penetrates through the front end wall of the feeding box and is fixed in a welded mode, and the outer sealing cover comprises an outer pressing connection part and an outer inserting cylinder. The outer crimping part is connected with the front end wall of the feeding box through a bolt, the outer diameter of the outer insertion cylinder is matched with the inner diameter of the inner insertion cylinder, the outer insertion cylinder is inserted into the inner insertion cylinder, and the outer diameter of the outer crimping part is larger than that of the inner crimping part. The device has the advantages of being simple in structure, convenient to install and maintain and the like.