575 results about "Bolted joint" patented technology

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 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 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 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 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 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 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 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 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 present application discloses a novel agricultural water conservancy irrigation device and method, belonging to the field of water conservancy irrigation. It includes a support base, and the top of the support base is equipped with two clamps connected by bolts. A hollow universal shaft is movably connected inside the two clamps; the top of the hollow universal shaft is rotatably connected to a hollow housing, two water spray nozzles are provided on the side of the hollow housing, and a water pipe joint is embedded on the side of the hollow universal shaft. In the present application, a rotating assembly is provided to enable the hollow housing to rotate synchronously when watering. Under the impact of the water flow, a plurality of blades will drive the sleeve rod and the first rotating rod to rotate. At this time, the gear on the first rotating rod rotates accordingly. Since the gear is in a meshing state with the annular rack and the annular rack cannot move, the rotating gear will drive the entire hollow housing to rotate through the first rotating rod, thereby increasing the water outlet area of the hollow housing during watering and improving the watering efficiency.

The utility model discloses a kind of precision sheet metal parts with accurate positioning structure belongs to precision sheet metal part assembling technical field, solve the problem of inconvenient disassembly maintenance of existing metal door plate, including box body component, box body component is bolted with support plate, rotatingly installed with metal door plate on support plate, metal baffle is bolted in box body component, the adjusting mechanism of being installed with being convenient for disassembly on metal door plate, by installing adjusting mechanism, rotating one side's drive rod, flat gear on the both ends of drive rod contact adjusting screw rod, two adjusting screw rods drive two rotating blocks mutually away along first disassembly groove inner wall, rotating block enters support plate and upper metal plate inside, facilitate metal door plate opening and closing, reverse rotating drive rod, control two rotating blocks mutually close, into second disassembly groove, facilitate to remove rotating block and replace, rotating the drive rod of other side, facilitate the rotating position of left and right sides of metal door plate is adjusted.

The invention discloses plasma arc welding equipment for frame straight seam welding, and relates to the technical field of plasma arc straight seam welding equipment.The plasma arc welding equipment comprises a rack installed on the upper surface of a machine base through bolts, and the side face, located below the rack, of the machine base is connected with a working rack for bearing a frame through bolts. According to the plasma arc welding equipment for frame straight seam welding, the end portions of the two frame workpieces are precisely bulldozed and aligned through the aligning mechanism, the initial assembly error is eliminated, rigid clamping is formed on the two sides of the frame workpieces through the clamping mechanism, the welding faces of the frame workpieces are forced to be tightly attached, and the welding efficiency is improved. The aligning mechanism, the clamping mechanism and the original pressing assembly form three-dimensional multi-point constraint on the frame workpiece, workpiece upwarp, transverse shrinkage and distortion caused by welding thermal stress are effectively resisted, finally, the clamping mechanism is in linkage with the top disc to operate, adsorption of the frame workpiece and the working table top is broken, quick and lossless workpiece taking is facilitated, and the welding quality is improved. And deformation of the frame workpiece is avoided.

The utility model relates to the technical field of bridge and tunnel engineering, and discloses an assembly type steel structure underground passage which comprises a foundation pit, a passage body arranged in the foundation pit and foundation pit padding. The channel body is in a box shape composed of a bottom plate, a top plate and side plates which are made of corrugated steel plates, the bottom plate, the top plate and the side plates are all arc-shaped plates arching towards the outside of the channel, corrugated flange plates attached to the bottom plate and the top plate respectively are welded to the two ends of each side plate, and the corrugated flange plates are connected with the bottom plate and the top plate through bolts. A waterproof structure is arranged at the joint; backfill is arranged in the arc-shaped concave surface of the bottom plate of the channel main body, and a pavement structure layer is paved on the backfill. The underground passage designed by the utility model has the advantages of short construction period, low manufacturing cost, high integral rigidity and strength of the structure, corrosion resistance, durability, long service life and the like.

The utility model discloses an assembly type steel structure pool self-tightening type side column node structure which comprises wallboard units, a steel column and a rubber sealing gasket, each wallboard unit comprises a wallboard surface and a wallboard side column, the steel column is correspondingly arranged between the two wallboard units, the cross section of the steel column is a trapezoid section with one large end and one small end, and the rubber sealing gasket is arranged between the wallboard surface and the wallboard side column. The small end of the wallboard side column is arranged on the upstream side close to the pool, the side, close to the steel column, of the wallboard side column is an inclined face matched with the side face of the steel column, a rubber sealing gasket is arranged between the wallboard side column and the steel column, and the wallboard side column, the rubber sealing gasket and the steel column are fixedly connected through high-strength bolts and achieve abutted seam sealing. And the wallboard units and the steel columns are compacted and reinforced under the action of water pressure in the water pool. The wall plate side column node is simple in structure and ingenious in design, the steel column and the wall plate side column section are optimally designed, the reinforcing and sealing effects can be achieved by means of water pressure in a water pool, and the problem of hidden danger of water seepage of the side column node is effectively solved.

The invention discloses a flat beam-wallboard column structure combined steel frame connecting structure and method.In a column-column and beam-column combined connecting system, steel columns and steel flat beams are made of hot-rolled section steel, can be prefabricated in a factory and are connected through combined connecting pieces and high-strength bolts after being transported to a site; according to the beam-slab structure combined connection system, the prefabricated floor slab and the steel flat beam are tightly connected through the steel beam embedded parts, the floor slab reserved steel bars, the threaded shear-resistant fasteners and part of cast-in-place concrete, and joint stress and cooperative deformation of the prefabricated floor slab and the steel flat beam are achieved; modular walls of the composite wall combination connecting system are composed of ceramsite concrete filling materials and wall frameworks and connected with the wall frameworks through steel flat beams and multifunctional embedded parts on steel columns, and the adjacent composite walls are connected in a mortise and tenon mode through concave-convex wall units on cold-formed thin-walled steel at the two ends. The construction method can meet the use requirements of overall stress, energy conservation, seismic resistance and the like of a modern fabricated building system, the construction efficiency can be remarkably improved, and the construction quality is guaranteed.

The application discloses an arc curved surface fair-faced concrete ribbed wood formwork and a manufacturing method, and the formwork comprises a film-coated plate, a wood batten rib plate and a concrete wall body. The film-coated plate comprises an inner side formwork and an outer side formwork, and is used for limiting concrete flow and guaranteeing the forming of the concrete wall body. The concrete wall body is in a circular ring structure and is located between the inner side formwork and the outer side formwork. The inner side formwork and the outer side formwork are connected through a tension bolt, and a plurality of wood batten rib plates are arranged on the side, away from the concrete wall body, of the inner side formwork and the outer side formwork, so as to guarantee that the film-coated plate panel bears force uniformly. The application avoids the problem that ordinary wood formworks are prone to deformation during processing and installation, guarantees the forming effect of curved surface fair-faced concrete, and saves construction cost compared with steel formworks and glass steel formworks.

The utility model provides an electric rotary combined type soil sampler. The electric rotary combined type soil sampler comprises a handheld electric drill, an adapter substitute, an upper end cover plug, a plurality of pipe joints and a drill bit, an adapter is mounted at the top end of the upper end cover plug, and the handheld electric drill drives the upper end cover plug to rotate through the adapter; the top of the first pipe section in the multiple pipe sections is connected with the upper end cover plug through a thread structure, and the bottom of the tail pipe section in the multiple pipe sections is connected with the drill bit through a thread structure. At least one of the multiple pipe joints is connected through an inserting structure and a lateral puller bolt; the inserting structure comprises an inserting head arranged at the end of one pipe section and an inserting opening formed in the matched end of the adjacent pipe section, an annular groove is formed in the periphery of the inserting head, a screw opening corresponding to the annular groove is formed in the side portion of the inserting opening, and a lateral puller bolt is in threaded fit with the screw opening and is clamped into the annular groove in a jacking mode, so that the two adjacent pipe sections can rotate in the circumferential direction after being connected. The structure of the soil sampler is suitable for electric transformation, and the threaded connection position is not prone to being locked.

Therefore, this application provides a bolt fastening system. The bolt fastening system may include a bolt, a nut, and a bolt fastening tool. The bolt fastening tool may include an adapter and a chamber. One of the adapter and the chamber applies torque to the bolt, and the other holds the nut.

The utility model relates to a multi -station high -efficient separation frock of CPU heat -dissipation glue relates to motor equipment maintenance technical field, and the left side of the connection frame is fixedly arranged on the left side outer wall of feed frame, and the left side of connection frame is provided with the slot, the screw rod is provided with through bearing swivel joint in the slot, and the upper end of screw rod is connected with drive wobble plate after passing through the connection frame, the moving block is arranged in the slot, and the front side of moving block is slidably arranged with the front side inner wall of slot, and moving block is sleeved on screw rod through thread rotation, the support is two, and opposite fixedly arranged on the upper and lower sides of moving block, and the support is arranged on the back of screw rod, the bolt is inserted and arranged in the support through thread rotation, the connecting block is fixedly arranged on the right side of tool, and the connecting block is inserted in the slot, the bolt is inserted and arranged in the connecting block through thread rotation, and the tool is driven to move through thread drive, reaches the purpose of adjusting tool, is not only simple operation, and the adjustment precision is high, improves the separation efficiency.

To improve workability while securing fire resistance performance of a steel joint member.SOLUTION: A wooden column joint member joint structure includes: a lower side wooden column 10 where a lag screw bolt 12 is provided on an upper end surface 10U; and a precast joint member 60 having a steel joint member 70 which is placed on the upper end surface 10U of the lower side wooden column 10, and which is joined to the lag screw bolt 12 by a bolt 84, and a precast concrete part 62 having a work hole 74H for storing the bolt 84 on an upper surface 62U, and for covering the steel joint member 70.SELECTED DRAWING: Figure 7

The invention provides a modularly-assembled prefabricated shear wall forming mold and a forming method thereof, and is applied to the technical field of prefabricated shear wall production, the modularly-assembled prefabricated shear wall forming mold comprises a bottom mold platform, and a lower long-strip module, a side edge assembling module and an upper long-strip module which are supported on the bottom mold platform; the side edge assembling module comprises a plurality of single-edge side molds and corner side molds which are sequentially connected through bolts in the circumferential direction of the shear wall, each single-edge side mold comprises an inner mold plate, an upper wall plate, a lower wall plate and two side wall plates, the upper wall plates, the lower wall plates and the two side wall plates are arranged on the periphery of the inner mold plate, the inner mold plates are attached to the shear wall, and first connecting holes are formed in the side wall plates. The upper wall plate is provided with an upper rib penetrating notch extending downwards to the side mold plate, the lower wall plate is provided with a lower rib penetrating notch extending upwards to the side mold plate, the upper rib penetrating notch and the lower rib penetrating notch are oppositely arranged in the longitudinal direction, and the forming mold has higher adaptability and more turnover times.

The utility model relates to the technical field of operation platforms, in particular to a four-limb latticed column detachable turnover shaping protection operation platform which comprises a steel column, and a reserved part is installed on the surface of the steel column. The side face of the supporting frame is connected with the reserved part through a bolt; the base plates are arranged on the top surface of the supporting frame, and the base plates are connected through a connecting plate; the checkered steel plate is arranged on the top surface of the base plate, and a square tube guardrail is mounted on the top surface of the checkered steel plate; a connecting column is fixedly installed between the steel columns, and a safety crawling ladder is arranged on the outer side of the connecting column. According to the utility model, a safe high-altitude operation platform can be provided for operators, and meanwhile, the operation platform can be detachably mounted and is convenient to turn over.

This invention belongs to the field of reactor structural mechanics technology, specifically relating to a method for analyzing and evaluating high-temperature bolted connection sealing structures. The invention includes the following steps: selecting the location of the reactor pressure vessel flange and main bolt connection as the object of sealing structure analysis; analyzing and summarizing the influence of gasket data on the deformation and contact surface pressure of various components of the flange bolted connection structure; researching current standards and analyzing their limitations; using the finite element software ANSYS to perform finite element modeling of the reactor pressure vessel flange and main bolt structure; applying loads and constraints to the finite element model of the reactor pressure vessel flange and main bolt structure; calculating the deformation and stress of the structure using different creep and relaxation models; analyzing the relaxation behavior of the high-temperature flange bolted connection structure using experimental methods; and comparing and analyzing the results of the finite element method, the standard method, and the experimental method. This invention enables the analysis and evaluation of the sealing performance of flange bolted connection structures under high-temperature environments.

The utility model provides a continuous flow micro-reactor for a heparinase catalytic reaction, belongs to the technical field of micro-reactors, and aims to solve the problems that the replacement of immobilized heparinase needs a long time and the efficiency of the heparinase catalytic reaction is influenced. Comprising a limiting supporting base, a positioning mounting frame, a reactor main body, a positioning connecting rod, a first storage tank and a second storage tank, the positioning mounting frame is in bolted connection with the right side of the limiting supporting base; the reactor main body is fixedly connected to the left side of the positioning mounting frame; the positioning connecting rod is rotationally connected to the left side of the reactor main body, and a damper is arranged at the joint of the positioning connecting rod and the reactor main body; the first storage tank is fixedly connected to the middle part of the positioning connecting rod; the second storage tank is in bolted connection with the front side of the first storage tank; according to the utility model, the replacement efficiency of the immobilized heparinase is improved, a large amount of time is saved, and the catalytic reaction efficiency of the heparinase is improved.