439 results about "Bolted joint" patented technology

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 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 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 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 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 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 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.

The utility model belongs to the technical field of detection tools, and particularly relates to a height difference detection tool. The device comprises a shell, the shell is divided into an upper shell body and a lower shell body, the upper shell body and the lower shell body are connected through a bolt, two adjacent cavities and two measuring columns are arranged in the shell, the two measuring columns are arranged in the cavities respectively, the upper sections and the lower sections of the two measuring columns can stretch out of the shell, the upper sections of the two measuring columns are attached to each other, and the lower sections of the two measuring columns are attached to each other. And the distance between the lower sections of the two measuring columns is matched with a measured part. The utility model is used for solving the technical problem that the existing measuring tool cannot quickly and accurately detect whether the height difference of different parts after superposition welding or abutted seam welding meets the design requirement.

The present invention relates to a detachable operating platform and construction method for welding pipelines in a shield tunnel corridor, comprising the following steps: connecting the end points of a steel pipe component by bolts, installing an adjustable self-locking steel belt, providing anti-skid rubber on the outer surface of the pipeline, and sleeve the steel pipe component and the adjustable self-locking steel belt on the outer surface of the pipeline; installing a connecting buckle between two straight steel pipe components at the top of the pipeline, adjusting the adjustable self-locking steel belt to fix the detachable operating platform; and performing pipeline welding in a shield tunnel corridor on the detachable operating platform. The beneficial effects of the present invention are: providing a working platform for pipeline welding construction, ensuring the safety of welding personnel, and being recyclable; connecting the left and right sides of the detachable operating platform by the connecting buckle, thereby improving the strength and safety of the detachable operating platform.

The utility model relates to the technical field of drilling construction, in particular to a gas drilling construction orifice protection device which comprises a protection device body and a base, the front end of a first shell in the protection device body is connected with an outer-layer gasket through a bolt, and the inner side of the outer-layer gasket is connected with an inner-layer gasket through a bolt. A first base plate is welded to the inner side of the rear end of a first shell in the protection device, a first mud blocking pad is placed in the hollow position in the first base plate, a threaded rod is rotationally connected to the threaded hollow position of the inner side of the first base plate in the protection device, and the outer side of a threaded structure in the protection device is in threaded connection with a threaded groove in the base. According to the utility model, the inner part of the first shell can be in a sealed state by inserting the outer-layer gasket and the inner-layer gasket into a wall, so that gas cannot be leaked when discharged, and the first shell can be connected with the second shell by connecting the thread structure with the thread groove; air pressure in the first shell and the second shell can be measured through the first pressure measuring meter and the second pressure measuring meter.

The utility model discloses thermal cutting equipment for sludge, and relates to the technical field of cutter rotation. Sludge thermal cutting equipment comprises a sludge cutting machine shell, flange plates are fixedly connected to the feeding end and the discharging end of the sludge cutting machine shell, a cutter grinding structure is located on the sludge cutting machine shell and comprises a plurality of cutter grinding stones and a sealing plate, and a mounting groove is formed in one side of the sludge cutting machine shell; the sealing plate is mounted in the mounting groove through a bolt, a sealing gasket is fixedly connected to the attaching position of the sealing plate and the mounting groove, the multiple cutter grinding stones are all connected to one side of the sealing plate through bolts, and under the cooperation of the sealing plate and the cutter grinding stones, the cutting tools can pass through the interiors of the corresponding cutter grinding grooves when rotating, so that the cutting tools are polished; and the cutter grinding stone can grind the cutting tool, so that the sharpness of the cutting tool is guaranteed, the cutting mechanism does not need to be dismounted after shutdown, and the sludge cutting effect is further improved.

The utility model provides a combined bushing assembly capable of being quickly connected, which is characterized in that a through hole is formed in the center of a bushing, the bottom of the bushing is a connecting end, and the top of the bushing is a positioning end; the clamp spring sleeves the top of the bushing and is positioned outside the positioning end; the top of the bolt is clamped in the center of the clamp spring and is in interference fit with the through hole, the bottom of the bolt penetrates through the lining downwards along the through hole and extends downwards, the clamp spring is added to the connecting portion of the top of the lining and the bolt, the clamp spring deforms during assembly and is in interference fit with the lining and the bolt, and the locking strength between the bolt and the lining is improved. When a gap is formed between the bolt and the bushing, the angle of the concave curved surface at the joint of the snap spring and the bolt is changed, so that self-adaptive adjustment is realized, and the situation that the bushing deviates due to the fact that the fit gap between the bushing and the bolt is increased and the vibration amplitude of the bolt is increased when the bushing and the bolt are in a thermal expansion and cold contraction state in a traditional riveting scheme can be eliminated; and internal deformation of the bushing can be prevented.

The utility model discloses an adjustable anti-sedimentation well lid for road maintenance, which relates to the technical field of well lids for road maintenance and comprises a base, a positioning block is arranged on the inner side of the base, a frame is arranged above the base, a positioning groove matched with the positioning block is arranged inside the frame, and threaded holes communicated with each other are arranged inside the frame and at the top of the base. Multiple sets of pressing plates are arranged above the threaded holes in the top of the base at one end, adjusting mechanisms are arranged above the pressing plates, the base at the other end and the frame are connected to the threaded holes through short bolts, multiple sets of mounting holes are formed in the positions, located on the side faces of the short bolts, of the top of the frame, damping mechanisms are arranged in the mounting holes, and protective well lids capable of being opened and closed are arranged at the tops of the mounting holes. The utility model is favorable for guaranteeing the driving safety, reducing the road surface damage, reducing the road maintenance cost and improving the working efficiency.

The utility model relates to the technical field of electromagnetic valve welding tools, in particular to a universal electromagnetic valve welding combined tool which comprises an internal and external leakage detection module and a welding module, the internal and external leakage detection module comprises a first connector and a second connector, and the first connector and the second connector are connected through a bolt. The inner side of the first connector is provided with an inserting cavity used for being connected with a welding module, the welding module comprises a base plate and a positioning plate, the base plate and the positioning plate are connected through screws, one side of the base plate is provided with an inserting head located in the inserting cavity, and the side wall of the other side of the base plate is provided with a containing cavity used for fixing a valve seat. And a welding positioning hole communicated with the storage cavity is formed in the base plate. During operation, multiple sets of tools do not need to be used in cooperation, errors among different tools are reduced, the yield of valve body manufacturing is further increased, meanwhile, operation steps are simplified, and the working intensity of operators is reduced.

The utility model discloses an oil pipe joint hot bend pipe processing device which comprises a displacement adjusting assembly and a heating mechanism, a positioning clamping mechanism is arranged on the inner side of the displacement adjusting assembly, a pipe fitting body is arranged at the output end of the positioning clamping mechanism, the heating mechanism is arranged above one end of the displacement adjusting assembly, and the other end of the displacement adjusting assembly is connected with the positioning clamping mechanism. The heating mechanism comprises a lifting frame, a top base, a transformer, a mechanical arm base, a first arm, a second arm, an electric hinge seat and a heating ring, the top base is connected to the upper portion of one end of the displacement adjusting assembly through a lifting frame bolt, and the transformer is arranged above the top base; according to the hot bent pipe machining device for the oil pipe joint, a positioning clamping mechanism is matched with an upper displacement adjusting assembly, and a pipeline can be heated and bent for multiple times according to needs under the operation of a lower lead screw set, a gear ring, an angle lead screw, a bolt strip and an arc-shaped clamping block; therefore, the automatic machining efficiency of the equipment can be effectively improved in the process.

The application discloses a device foundation bolt lengthening method and a tightening device in the technical field of device installation, the tightening device comprises a handle and a mounting ring mounted on the end of the handle, the tightening device further comprises a sleeve ring rotatably mounted in the mounting ring, a plurality of groups of slotted holes are formed in the outer side wall of the sleeve ring, an insertion block for being inserted into the slotted holes is slidably arranged on the mounting ring, a pressing block is slidably arranged on the handle, and a connecting rope is arranged between the pressing block and the insertion block, in the application, a screw rod with a nut is processed, internal threads are processed on the screw rod, the screw rod with the nut is directly connected with a pre-buried bolt, the length of the pre-buried bolt is increased, normal installation and fixation of the device are ensured, the difficulty of construction is reduced, the construction period is shortened, the work efficiency is improved, the construction progress of the project is ensured, and the engineering cost is reduced.

The invention discloses a double-pipe drilling tool synchronous loading and unloading device and a loading and unloading method. The device comprises a manipulator, a rotary positioning mechanism, a clamp combination body and a power head, the manipulator is arranged on the side of the drilling mast and connected with the frame; the manipulator is composed of a gripper and a movable arm, the gripper is composed of a movable clamping block and a fixed clamping block, and a sleeve clamping block and a drill rod clamping block are arranged in the gripper and connected through bolts; the movable arm is connected with the fixed arm through the rotary oil cylinder; the rotary positioning mechanism consists of a thrust plate, a manipulator platform and a rotary speed reducer; the manipulator platform comprises a manipulator platform mounting plate and a mounting base fixed on the frame; the rotary speed reducer is fixed on the manipulator platform; a movable ring of the rotary speed reducer is in bolted connection with the manipulator fixed arm base; the clamp combination body comprises a lower clamp, a middle clamp and an upper clamp; the power head is limited through the power head drilling mast rail groove and slides up and down along the drilling mast; the pipe joint is of a structure suitable for a double-pipe drilling tool. By means of the device, personnel do not need to make direct contact with the drilling tool, and the accident rate is reduced.

The invention belongs to the technical field of anti-seismic connection of inorganic glue composite bamboo structures, and relates to an inorganic glue composite bamboo-profile steel combination column-beam connection joint with graded energy consumption and self-resetting functions and an assembly method thereof. Comprising an inorganic glue composite bamboo-section steel combination column, an inorganic glue composite bamboo splicing beam, an energy dissipation steel hoop connecting piece and a beam-column joint connecting steel member. The inorganic glue composite bamboo-section steel combination column is provided with hollow round-corner cross-shaped steel, and the middle of the cross-shaped steel is provided with an extending connecting energy-dissipation steel filling plate which is used for being reliably connected with a joint connecting steel component and an energy-dissipation steel hoop connecting piece. The beam ends of the inorganic glue composite bamboo splicing beams and the energy dissipation steel hoop connecting pieces are connected through bolts to form an integral beam assembly. The energy dissipation steel hoop connecting piece comprises a four-side wrapping steel cap and energy dissipation angle steel, under the action of an earthquake, the energy dissipation angle steel firstly generates yield deformation to form a first-stage energy dissipation mechanism, then the node steel component further generates plastic deformation to form a second-stage energy dissipation mechanism, and therefore a double-energy-dissipation structure system is formed, and earthquake energy is effectively dissipated.