19322 results about "Bolt connection" patented technology

The invention discloses a bolt looseness online monitoring method and system, and the method comprises the steps: collecting an original data set containing a vibration signal of bolt connection, temperature gradient data and structural stress distribution through a multi-mode sensor array, and carrying out the time-space alignment and frequency domain decomposition processing of the original data set, obtaining a multi-dimensional feature matrix of the bolt nodes; based on the multi-dimensional feature matrix, a graph neural network model is adopted to carry out bolt looseness probability calculation, and a real-time looseness probability value of each bolt is output; generating a risk level map based on time evolution according to the real-time loosening probability value; and the risk level map is mapped in real time through a three-dimensional visual interface, and when it is detected that the bolt loosening risk level exceeds a preset threshold value, an early warning message is generated and uploaded to an operation and maintenance platform, and closed-loop monitoring response is completed. According to the embodiment of the invention, accurate assessment, dynamic prediction and visual early warning of the loosening risk can be realized, and the intelligent level of structure safety monitoring is improved.

The invention discloses a bolt on-line monitoring method and system, and the method comprises the steps: generating a micro-motion feature matrix of a bolt according to a multi-dimensional vibration signal and a stress wave propagation characteristic of a bolt connection part; based on the micro-motion characteristic matrix, fusing local stress distribution data acquired by a bolt surface strain gauge, and outputting a health state quantitative index of the bolt; outputting a loosening risk level according to the health state quantitative index and historical loosening evolution data; and based on the looseness risk level and in combination with equipment operation state parameters, a self-adaptive decision tree model is adopted to dynamically adjust monitoring frequency and an alarm threshold value, a real-time monitoring strategy and a visual early warning report are generated, and a wireless transmission module is synchronously triggered to upload the real-time monitoring strategy and the visual early warning report to a cloud operation and maintenance platform. According to the embodiment of the invention, high-precision, self-adaptive and traceable bolt health state evaluation and early warning can be realized.

The utility model relates to a multi-stroke wire pushing rod mechanism of a wire drawing machine, which belongs to the technical field of wire drawing machines and comprises a wire drawing machine frame, a plurality of machine heads are arranged at the front end of the wire drawing machine frame, yarns which are wound with the machine heads to form a barrel are arranged on the machine heads, and composite wire feeding rings which are fixedly connected with the machine heads are arranged at the front ends of the machine heads. A yarn pushing rod mechanism fixedly connected with a rack of the wire drawing machine through bolts is arranged above the machine head, and the yarn pushing rod mechanism drives yarn to complete the creeling and head feeding process on the composite yarn feeding ring. The device has the characteristics of compact structure, good operation stability and high use efficiency. The problem that the amount of yarn falling into a deep groove is large is solved. The problem that large and small silk threads cannot be automatically fed and automatically reeled on the same drawing machine is solved. The front end of the wire pushing air cylinder is jacked, and any position control is achieved through the stroke positions of the two air cylinders.

The invention relates to the technical field of turning machining, in particular to a numerical control turning machine tool for fastener machining, which comprises a machine shell, a tool rest column body, a tool apron body and a chuck, and further comprises a surface cover shell bolted to the tool apron body, a plurality of auxiliary rollers are rotatably connected to the inner side of the cover shell, a magnetic synchronous belt is further arranged on the inner side of the cover shell, and the magnetic synchronous belt is arranged on the outer side of the tool apron body. The side, close to the housing, of the tool apron body is further in bolting connection with a fixing plate, and the surface of the fixing plate is in bolting connection with a square electromagnet. The square electromagnet is started, and when the tool apron body moves, metal chips on the top and the side edge of the tool rest column body are attracted to the surface of the magnetic synchronous belt, so that the situation that the magnetic synchronous belt is directly contacted with the tool rest column body to be stained and damaged in a large area is avoided; in the process of adsorbing the metal chips, the metal chips cannot move slightly on the surface of the tool rest column body, the tool rest column body is not prone to being abraded, and the service life of the tool rest column body is prolonged.

The present invention relates to the technical field of fabricated buildings. Disclosed is a fabricated steel structure residence system. The fabricated steel structure residence system of the present invention comprises a frame portion and a shear wall portion, wherein the frame portion comprises a special-shaped column, a steel beam and a floor system; and the special-shaped column comprises a steel pipe and a plurality of T-shaped steels arranged along a peripheral wall of the steel pipe. A combined T-O section form of the special-shaped column provided by the present invention can realize relative separation of a pressure from bending on a combined section, such that the fabricated steel structure residence system has good bending bearing capacity and rigidity. The characteristic of an outer T-shaped steel is used such that a full-bolt connection form can be used between the steel beam and the special-shaped column. Moreover, a reinforcement member is provided at a beam-column joint, such that the rigidity and strength of the joint region are improved. In addition, specific structures of a floor system and a shear wall are further optimized, and a corresponding joint connection method is provided, such that the fabricated steel structure residence system that can be quickly assembled and is stable in terms of connection is formed.

The present application relates to a pile driver and a pile driving method with less wear on drill rods, and relates to the technical field of building construction, and comprises a main frame, a winch is arranged on one side surface of the main frame, a steel cable is wound on the drum of the winch, a top frame is welded on the top of the drill rod bracket, one end of the steel cable extends upward through a pulley and is connected to a drive box through a lifting ring, a motor frame is arranged in the middle of the drive box, a drive motor is connected to the center of the motor frame through bolts, the bottom drive of the drive motor is connected to a reducer, and the bottom output end of the reducer is connected to a buffer mechanism through the drive box, and the buffer mechanism comprises a connecting tube, a rebound tube, a coupling joint, a strip groove, a slider, a damping rod, a support spring and an auxiliary spring; the present application significantly reduces the wear of the drill rod during the construction process by using a high-strength, wear-resistant alloy material to make the drill rod, performing special treatment, and arranging a buffer mechanism and a guide mechanism.

The embodiment of the invention provides a bolt and bolt group monitoring method and device, and a bolt looseness detection system is constructed by combining an engineering mechanical model and a multi-source image analysis technology. According to the method, detection units are divided, a stress distribution model is established, median filtering and a bolt segmentation model are used for processing two-dimensional image data, depth image data are analyzed in combination with a binocular depth estimation algorithm based on parallax consistency check, and accurate recognition of the position and state of the bolt is achieved. The system judges transverse and longitudinal loosening states through comparative analysis of measured average angles and distances, and evaluates the influence of loosening propagation. According to the method, the defects of the traditional technology in the aspects of detection efficiency and precision are effectively overcome, and reliable technical support is provided for safety monitoring of the bolt connection structure.

The invention discloses a prefabricated wallboard assembly structure and an assembly method thereof, and relates to the technical field of building prefabricated wallboards, the prefabricated wallboard assembly structure comprises a first wallboard and a second wallboard, a plurality of inserting grooves are formed in one side of the first wallboard, and hydraulic expansion splicing mechanisms are symmetrically mounted in the inserting grooves up and down; the hydraulic expansion splicing mechanism is composed of a metal sleeve, meshing teeth, a sealing rubber ring, a piston and an oil injection mechanism, the metal sleeve and the inserting groove are welded and fixed, an oil cavity is formed in the metal sleeve, multiple sets of mounting grooves are formed in one end of the metal sleeve, four annularly-distributed sliding grooves are formed in the outer sides of the mounting grooves, and the sliding grooves are communicated with the oil cavity. A plurality of inserting blocks are arranged on one side of the second wallboard, connecting holes are formed in the inserting blocks in an up-down symmetrical mode, a plurality of meshing grooves are formed in the inner ends of the connecting holes, and the problem that most existing prefabricated wallboards are connected through bolts, stress concentration is prone to occurring, and consequently the structural stability is reduced is solved.

The invention relates to the technical field of parameter simulation, in particular to a parameterized simulation model design method based on a standard part structure. The method comprises the following steps: collecting bolt connection data of standard components in the wind generating set; blade surface vibration feature information is extracted according to the standard component bolt connection data; acquiring stress concentration distribution data at the joint based on the blade surface vibration characteristic information; calculating a local deformation accumulated value of the standard part according to the stress concentration distribution data at the joint; measuring the friction coefficient variation trend of the contact surface based on the local deformation accumulated value of the standard component; deducing pre-tightening force attenuation characteristics according to the change trend of the friction coefficient of the contact surface; and constructing a standard part fatigue damage prediction model based on the pre-tightening force attenuation characteristics. According to the method, the vibration characteristics of the blade surface are collected, the stress concentration distribution at the bolt connection position is indirectly extracted, and the bottleneck that the internal connection state is difficult to directly sense is broken through.

The invention belongs to a new energy automobile body structure in the technical field of new energy automobiles. The outer frame beam (4) and the lower bottom plate (5) are of an integrated structure made of aluminum alloy, a trapezoidal structure or a wedge-shaped structure is arranged on the outer side of the outer frame beam (4), a protruding part (10) of the threshold inner plate (9) abuts against the upper portion of the outer frame beam (4), an inner plate inclined face part (11) abuts against an outer frame inclined face part (7), a bolt bush (13) is arranged on the inner side of the inner plate inclined face part (11), and a threaded sleeve (14) is arranged on the inner side of the outer frame beam (4). A bolt (15) is connected with the threaded bushing (13) and the threaded sleeve (14), and an internal arrangement beam (6) is arranged in the lower shell (2) under the seat cross beam. According to the new energy automobile body structure, the structure is simple, the space utilization rate is increased, meanwhile, the bending torsion and collision performance of an automobile body is improved, meanwhile, the safety performance of side collision and side column collision is improved, and the torsional rigidity and the side collision performance of the automobile body are improved.

The invention provides a steel box structure, a steel box girder, a movable modular steel box girder bridge and a manufacturing method, and relates to the technical field of bridge steel boxes, the steel box structure comprises a steel box, the steel box girder formed by combining the steel box structure and the movable modular steel box girder bridge comprising the steel box girder, the steel box is of a closed box body structure formed by welding a top plate, a bottom plate, webs, transverse partition plates and reinforcing transverse ribs, U-shaped longitudinal stiffening ribs and I-shaped longitudinal stiffening ribs are welded to the top plate and the bottom plate in the longitudinal direction respectively, the transverse partition plates and the reinforcing transverse ribs are arranged in the box body at certain intervals in the longitudinal direction of the bridge, a plurality of splice plates are arranged on the outer sides of the webs, and the splice plates are connected with the U-shaped longitudinal stiffening ribs and the I-shaped longitudinal stiffening ribs. And the two transversely adjacent steel box girder sections are connected through the connecting plates by adopting high-strength bolts. The structure system is simple and reliable, has high bearing capacity and high mounting and moving speed, and solves the problems that strip mine passing vehicles are large in load, the bridge arrangement position needs to be adjusted frequently, and a traditional structure is high in investment.

The invention provides a large-load industrial-grade humanoid robot upper half body module and a humanoid robot, and belongs to the technical field of robots. The large-load industrial-grade humanoid robot upper half body module comprises a head, an upper half body, a left arm and a right arm; the left side and the right side of the square chest upper body are rotationally connected with a left arm and a right arm respectively, and the square chest upper body comprises a chest structure, a waist structure, a waist rotation driving joint, a waist joint mounting part, a body binocular depth camera, a camera radar mounting part, a 360-degree laser radar, a camera mounting part and a robot battery system; the robot upper body module can be operated in multiple directions, and the flexibility and adaptability of the robot upper body module are improved; the thoracic cavity structure is stably made of plates and connected through tenons and bolts, higher rigidity and strength can be provided, and the overall weight and the machining difficulty of the thoracic cavity structure can be effectively reduced on the premise that the load weight is guaranteed.

The utility model relates to the field of railway vehicles, and provides a suspension vehicle. The suspension vehicle comprises a bogie, the bogie comprises a framework, the framework comprises a walking part mounting frame and a pair of cantilever beams, the walking part mounting frame is used for mounting walking wheels, each cantilever beam comprises a connecting end and an extending end, the connecting ends are mounted on the walking part mounting frame, the extending ends are used for mounting equipment components, and the pair of cantilever beams are symmetrically arranged relative to the walking part mounting frame; the vehicle body is suitable for being installed on the walking part installation frame through a pin shaft. According to the suspension vehicle, the framework is arranged in the form of the walking part mounting frame and the pair of cantilever beams, and the pair of cantilever beams are arranged in the form of being symmetrical relative to the walking part mounting frame, so that the occupied space of the framework can be reduced, and the space requirement of a track beam of the suspension vehicle is met. By arranging the vehicle body and the walking part mounting frame in a pin shaft hinging mode, the problem that bolt connection fails due to the fact that bolt connection is adopted in the related technology can be solved, and the vehicle body hanging safety is improved.

The invention belongs to the technical field of welding, and particularly relates to a positioning device for welding a fireproof valve, which comprises a base, one side of the top of the base is provided with a moving mechanism, the top of the moving mechanism is provided with a supporting seat, and the other side of the top of the base is connected with a fixing seat through a bolt. Inserting grooves are formed in the opposite sides of the fixing base and the supporting base correspondingly, fixing grooves are formed in the positions, located at the bottoms, of the two opposite sides of the inserting grooves, storage grooves are formed in the positions, close to the tops, of the two opposite sides of the inserting grooves correspondingly, and through openings are formed between the bottoms of the storage grooves and the tops of the fixing grooves. A fixing mechanism is arranged among the inserting groove, the fixing groove and the containing groove. According to the welding device, the blades and the rotating shaft can be effectively fixed through cooperation of the pressing mechanism and the fixing mechanism, and the situation that due to the poor fixing effect of the blades and the rotating shaft during welding, the positions of the blades and the rotating shaft deviate during welding, and welding of the blades and the rotating shaft is affected is prevented.

The invention relates to the technical field of battery box bodies, and discloses an ultrahigh-strength rolling steel battery lower box body and a production process thereof.The battery lower box body comprises a frame, a liquid cooling plate and a bottom protection plate which are sequentially arranged from top to bottom, sealant is arranged between the lower end of the frame and the liquid cooling plate, and the lower end of the frame and the liquid cooling plate are connected through a step-free double-layer rivet nut; sealing cotton is arranged between the liquid cooling plate and the bottom protection plate and connected through bolts. The frame is mounted on a vehicle body, and the battery is mounted in the frame. An outer edge beam, an inner beam and a vehicle body connecting mounting beam are produced by using an ultra-high-strength sheet 1.0 mm material with the elongation percentage being 5% or above through rolling, pipe coiling and other processes, the strength is guaranteed by designing a reinforced shape, meanwhile, the effects of light weight and low cost are achieved, and the cost of a moped enterprise is reduced, and the product competitiveness is improved; the bottom of the lower box body adopts a step-free double-layer riveting sealing structure, so that a double-layer sealing effect is achieved, a gap between a bottom protection plate and a liquid cooling plate is eliminated, sundries are prevented from being accumulated in a cavity, and the service life of the lower box body is prolonged.

The invention relates to the technical field of cutting devices, in particular to an LED display screen cutting device and process, the LED display screen cutting device comprises an operation base and a U-shaped mounting frame, the U-shaped mounting frame is fixedly mounted at the top of the operation base, a rotary adjusting motor is fixed to the inner wall of the top side of the U-shaped mounting frame, and a transverse mounting strip block is fixedly connected to an output shaft of the rotary adjusting motor; a limiting sliding groove is formed in the bottom of the transverse installation strip block, a transverse movement driving assembly is installed in the limiting sliding groove, a laser cutting head is installed on the transverse movement driving assembly, the laser cutting head is fixedly connected with the transverse movement driving assembly through a plug pin connecting assembly, and a vertical extending plate is fixedly installed on the transverse installation strip block. The vertical extension plates are located on the two sides of the laser cutting head, and lateral installation blocks are fixedly installed on the two sides of the operation base. According to the cutting device, the cutting head can be disassembled, assembled and replaced very simply and conveniently, the maintenance cost is effectively reduced, the problem of cutting inclination is effectively avoided, and meanwhile the cutting flexibility and efficiency are greatly improved.

The invention relates to the technical field of parts of conductive connecting devices, in particular to a connector busbar connecting structure. The connector busbar connection structure provided by the invention is an element change type invention and creation, the socket contact piece and the busbar do not need to be independently connected when the socket is installed by setting a conductive connection mode of plugging connection between the busbar and the socket contact piece, so that the installation process is simplified, and the installation efficiency is improved. And meanwhile, an operation space does not need to be reserved in the equipment, the miniaturization of the equipment can be realized, the socket contact piece and the busbar do not need to be independently disassembled when the socket is disassembled, the socket can be directly pulled out and taken down from the equipment panel only by disassembling the mounting bolt of the socket, and the later maintenance and replacement of the socket are relatively convenient.

The invention provides a wing-shaped structure duct piece and an assembly type lining structure, and relates to the technical field of shield tunnel and assembly type vertical shaft engineering, the wing-shaped structure duct piece comprises a first piece body and a second piece body, the first piece body and the second piece body are integrally connected in the first direction, and the lengths of the first piece body and the second piece body in the first direction are equal; the length of the first sheet body in the first circumferential direction is greater than that of the second sheet body; the end face, in the first circumferential direction, of the first sheet body can be connected with the end face, in the first circumferential direction, of the second sheet body in a matched mode. The top end face of the first sheet body can be connected with the bottom end faces of the first sheet body and the second sheet body in an inserted mode in the first direction. After the wing-shaped structure duct pieces are spliced, no through seam is generated in the circumferential direction and the longitudinal direction, meanwhile, in the splicing process, insertion connection is adopted in the first direction, end faces of the first piece bodies and the second piece bodies of the different wing-shaped structure duct pieces are connected in a matched mode in the first circumferential direction, and compared with a traditional bolt connection mode, the splicing process is simpler, and the splicing efficiency is improved. The construction efficiency is high.

The invention discloses a fabricated building module anti-seismic connection node structure, which relates to the field of fabricated buildings, is used for connecting beam columns and I-shaped beams, and comprises two connection plates symmetrically mounted at the end parts of the I-shaped beams; the fixing base is fixedly installed on the beam column, two symmetrically-arranged bearing parts are arranged on the fixing base, inserting grooves allowing the connecting plates to be inserted are formed in the bearing parts, and the connecting plates are connected with the bearing parts through bolts; the N first friction pieces are arranged between the two bearing parts; the first friction pieces and the second friction pieces are distributed in a staggered mode to form a friction contact face, during an earthquake, displacement of the beam column and the I-shaped beam forces the first friction pieces and the second friction pieces to slide relatively, kinetic energy is converted into heat energy to be dissipated, meanwhile, the N first friction pieces and the N + 1 second friction pieces are staggered to form multi-point friction, and the friction contact face is formed. The energy consumption efficiency is gradually increased along with the displacement magnitude, the anti-seismic energy consumption capacity of the structure is greatly improved, and damage of an earthquake to a building structure is effectively reduced.

The invention discloses a wide crawler walking device suitable for seabed thin and soft geology, which realizes stable walking of a deep-sea heavy-load mining operation platform on a thin and soft substrate through a high-tooth large-width composite material crawler walking mechanism, and provides a power driving guarantee for later operation of a heavy and heavy collection device. The crawler walking module is used for providing enough traction force for the mining vehicle, so that the mining vehicle can normally run on the complex bottom surface of the seabed. A crawler walking device is located in a chassis, the overall width of a vehicle body is reduced, a main beam of the chassis penetrates through trolley frames on the two sides, chassis secondary beams are welded to outer side panels of the trolley frames, the bearing capacity of the chassis is improved, the trolley frames are of a simple frame structure, and through holes and open grooves are machined in left and right outer side plates of the trolley frames and used for installing driving wheels, guide wheels and bearing wheels. Welding or bolt connection of other wheel train installation type structural parts is omitted, the lightweight design is met, and the structural strength is enhanced.

The invention relates to the technical field of agricultural machinery, in particular to a movable pit digging device for seedling planting. The invention provides the movable pit digging device for seedling planting, which can discharge soil on the spiral drill rod, prevent the soil from flowing back and improve the pit digging efficiency and quality. A movable pit digging device for nursery stock planting comprises a crawler, bolts, a connecting frame, a pit digging mechanism and a soil retaining mechanism, the connecting frame is detachably connected to the upper side of the crawler through a plurality of bolts, the pit digging mechanism capable of digging pits in the ground is arranged on the connecting frame, and the soil retaining mechanism capable of retaining soil is arranged on the pit digging mechanism. When the spiral drill rod rotates downwards to dig holes, a baffle is always attached to the spiral drill rod through the acting force of a second spring, soil on the spiral drill rod is discharged to the outer side of a baffle frame through the baffle, and the effects that the soil on the spiral drill rod can be discharged, soil backflow is avoided, and the hole digging efficiency and quality are improved are achieved.

The invention discloses a bolt looseness full-period acoustic emission monitoring method based on variational mode decomposition, and relates to the technical field of nondestructive testing, and the method comprises the steps: collecting acoustic emission signals of a bolt connection interface under a plurality of grades of pre-tightening forces; variational mode pre-decomposition is carried out on the acoustic emission signals, and the optimal decomposition layer number is determined through the decomposition mode energy difference rate; on the basis of the determined optimal decomposition layer number, performing variational mode decomposition on all the acoustic emission signals to obtain a plurality of intrinsic mode functions; calculating an energy value of each intrinsic mode function, establishing a change relationship between the energy value of each intrinsic mode function and different levels of pre-tightening forces, and screening out a characteristic mode most sensitive to the change of the pre-tightening forces; and establishing a mapping relation between the screened characteristic modal energy and the pre-tightening force, obtaining a loosening change curve, dividing the bolt loosening process into different stages according to the loosening change curve, and realizing quantitative monitoring of the whole period of bolt loosening. The safety and reliability of the bolt connection structure are improved.

The invention belongs to the technical field of cable supports, and particularly relates to a cable erection supporting device which comprises a bottom plate, symmetrical supporting plates are fixedly arranged on the upper side wall of the bottom plate, a limiting plate is fixedly arranged at the upper ends of the two supporting plates, and the number of cables needing to be erected can be conveniently adjusted according to the number of the cables needing to be erected. The extension length of a second adjusting plate in the storage plate is adjusted, so that a corresponding number of first clamping plates are arranged at the upper end in a clamping manner, and the first clamping plates are matched with a threaded rod, a rotating pipe, a fastening bolt, a rubber pad and a second fixing pipe to clamp and fix a cable; through joint cooperation of a first fixing pipe, a threaded rod, a rotating pipe, a fastening bolt, connecting rods, rubber pads and second fixing pipes, the angle of the two connecting rods can be adjusted when a cable needs to be erected at a bending angle, so that the two second fixing pipes and the first fixing pipe form a triangle, and the cable is erected conveniently. And the cable can be bent at an angle during erection, so that the erection requirement is met.

The invention discloses an automatic ash removal type thermal cycle supercritical CO2 flue gas heat exchanger which comprises a connecting frame, a first sealing cover and a second sealing cover are connected to the front side and the rear side of the connecting frame through bolts correspondingly, a dust suction assembly is arranged on the front side of the first sealing cover, and a heat exchange pipe is fixedly connected to the interior of the connecting frame; a plurality of heat conduction fins are fixedly connected to the heat exchange pipe, and one end of the heat exchange pipe is fixedly connected with a first air inlet pipe. According to the cleaning device, a servo motor drives a corresponding reciprocating lead screw to rotate, a cleaning assembly can be driven to reciprocate along a limiting rod through a mounting plate through transmission of a first chain wheel and a first chain, in the moving process of the cleaning assembly, an arranged gear is meshed with a rack, a corresponding rotating shaft can be driven to rotate, and through transmission of a second chain wheel and a second chain, the cleaning assembly is driven to rotate. And the rotating shafts can be driven to rotate, so that the connecting shafts arranged between the rotating shafts are driven to rotate, and the cleaning brushes can be driven to rotate to clean the exteriors of the heat exchange tubes and the heat conduction fins.

The invention discloses a blade bolt state monitoring system and method based on an acoustic emission technology in the technical field of state monitoring of wind power generation equipment. The method comprises the following steps: acquiring acoustic emission signal data of a blade bolt connection area acquired by an acoustic emission sensor array; sequentially carrying out preprocessing and feature extraction processing on the basis of the acoustic emission signal data, and then calculating a wavelet packet energy entropy value; judging whether a triggering condition of multi-sensor data fusion weighting judgment is met or not based on the wavelet packet energy entropy value; when any triggering condition is met, it is judged that the state of the bolt is abnormal, and after comprehensive state recognition is conducted through multi-sensor data fusion weighted judgment and modal acoustic emission wave velocity correction positioning, early warning information including the damage type, the severity degree and position information is output; when the triggering condition is not met, it is judged that the bolt state is normal, and circulating monitoring continues. According to the invention, accurate evaluation and early warning of the blade bolt state are realized through signal acquisition, processing, analysis and early warning.

A storage system includes a storage grid structure and multiple remotely operated storage bin handling vehicles. The storage grid structure includes vertical storage column profiles defining multiple storage columns in which storage bins can be stored one on top of another in vertical stacks. Each of the storage column profiles have an upper end and a lower end and the storage column profiles are interconnected at their upper ends by rails forming a horizontal rail grid upon which the bin handling vehicles may move in two perpendicular directions. The storage grid structure features grid supports include multiple base angle brackets. Each base angle bracket includes a vertical flange and a horizontal flange. The vertical flange is connected to a storage column profile. The horizontal flange is connected by bolts to a floor upon which the storage grid is arranged and a web interconnecting the flanges. Each of the flanges has a first end and a second end. The first end is arranged closer than the second end to the lower end of the storage column profile to which the vertical flange is connected. The web has a recess arranged between the first ends of the flanges.

The utility model relates to the technical field of energy dissipation and shock absorption of civil engineering structures, in particular to a replaceable belleville spring connecting device with a self-resetting energy dissipation function, which comprises a plurality of complex belleville spring connecting devices used in a frame swing wall structure, the device comprises a plurality of belleville springs, and gaskets are arranged among the belleville springs; second outer baffles are installed on the left side and the right side of the device, the first baffles and the second baffles on the upper side and the lower side are connected through high-strength bolts, a thrust bottom plate and a hexagonal locking nut are arranged on the right sides of the second baffles, and a single-lug plate is arranged on the left sides of the second baffles. The connecting device has the advantages that the resetting and energy consumption principles of the connecting device are basically the same as those of a common steel strand and a damper, the mounting mode is simpler, the manufacturing cost is lower, and the universality is better; and on the other hand, the connecting device has better replaceability, the damaged belleville spring, the damaged gasket and the damaged rubber pad are detached and replaced, the production cost is reduced, earthquake energy can be dissipated, and resetting of the structure after an earthquake is achieved.

The utility model relates to the field of containers, in particular to a fixing structure of a goods shelf in a container, the container comprises a top plate, side plates and a bottom plate, the top plate is provided with top plate reinforcing ribs, the side plates are provided with side plate reinforcing ribs, nut blocks are welded on the top plate reinforcing ribs and the side plate reinforcing ribs, the bottom plate is provided with a T-shaped floor, and an aluminum cushion block is welded in the T-shaped floor; the top of the goods shelf is fixedly connected to the top plate through cooperation of bolts and nut blocks. Side stand columns, close to the side plates, of the goods shelf are fixedly connected to the side plates through cooperation of bolts and nut blocks. The bottom of the goods shelf makes direct contact with the T-shaped floor and is fixedly connected to the bottom plate through cooperation of bolts and aluminum cushion blocks. The reinforcing rib structure in the container body is fully utilized, the goods shelf and the container body are fully connected, the goods shelf filled with goods cannot move in the transportation process, and impact damage to the container body cannot be caused; meanwhile, only bolt connection is used, and installation is convenient.

The invention discloses a passive radio frequency identification-based bolt connection state monitoring device and method, and belongs to the field of spaceflight, and the device comprises a monitoring device, an RFID reader and an upper computer. The monitoring device is provided with an ID and is installed corresponding to the paired bolts and nuts to be monitored. The lower end of a shell of the monitoring device is open and is coaxially fixed to a nut, and the tail end of a screw of a bolt extends into an inner cavity of the shell. An inductance coil is packaged on the side wall of an inner cavity of the shell, the RFID module is fixed to the top of the shell, and the two ends of the coil are connected into a circuit of the RFID module to form a closed loop. The electric signal change generated when the nut rotates relative to the bolt is sensed through the coil, and bolt loosening information is obtained. The RFID module is used for monitoring electric signals in real time, the upper computer is used for issuing monitoring commands and processing data, and the RFID reader is used for establishing two-way information communication between the RFID module and the upper computer. The problem of simultaneous monitoring of the connection states of a plurality of bolts under the working conditions that the bolts are relatively small in size and relatively dense in spaceflight satellites and the installation space of a monitoring device is very limited is solved.

The invention discloses a printing machine accessory installation precision detection device and method, and belongs to the technical field of printing machine accessory detection, the printing machine accessory installation precision detection device comprises a working plate, a motor and a material box, the lower surface of the working plate is in threaded connection with a support, the interior of the working plate is fixedly connected with a limiting rod, and the working plate is symmetrically distributed about the center of the limiting rod; the motor is in bolted connection with the outer wall of the working plate on the left side; and the spray head is fixedly connected to the tail end of the inner connecting pipe of the vertical plate. When the printing machine accessory installation precision detection device works, printing machines provided with printing rollers are tidily placed in front of a detection high-definition probe, then a motor is started, when the motor works, an equipment box and the detection high-definition probe are driven to move in the horizontal direction through a threaded rod and a limiting rod, workpieces are detected, and when defective products are detected, the printing rollers are driven to move in the horizontal direction. And marking liquid is sprayed through the spray head to mark the defective products, so that the defective products can be conveniently treated by workers.