62results about How to "Efficient connection" patented technology

The invention provides an automatic transfer system for tobacco primary processing and unpacking, the automatic transfer system for tobacco primary processing and unpacking comprises a process planning module, an equipment execution module and an operation monitoring module, the process planning module is used for obtaining a box skin transfer process of a tobacco primary processing and unpacking link and generating a corresponding unpacking operation instruction; the equipment execution module is used for responding to the unpacking operation instruction and carrying out unpacking transfer work according to the unpacking operation instruction; and the operation monitoring module is used for monitoring the instruction issuing state of the process planning module and the operation running state of the equipment execution module, and visually displaying the instruction issuing state and the operation running state. Through cooperative linkage of the three modules, full-process automation of box skin and lining paper collection and the like in the tobacco primary processing unpacking link is achieved, manual operation is effectively replaced, the situation that in the prior art, an AGV is only used as a pure transfer tool is changed, and the overall automation degree and operation efficiency are greatly improved.

The utility model discloses a kind of VOC processing device convenient to replace filter screen, it is related to VOC processing technical field, including article main body, the side of the article main body is equipped with installation opening, the side of the article main body is fixedly connected with fixed plate, the side of the fixed plate is fixedly connected with storage shell, the side of the storage shell is movably connected with cover plate, the side of the cover plate is fixedly connected with handle, the side of the storage shell is fixedly connected with controller, the side of the storage shell is fixedly connected with protective shell, the side of the protective shell is fixedly connected with air guide frame, the side of the air guide frame is fixedly connected with fixed block, the side of the fixed block is fixedly connected with motor. The utility model, when user needs to use installation to processing device, the side of the article main body set by user through multiple installation openings can be conveniently used to efficiently use installation to processing device.

The invention discloses a reinforcing steel bar connecting sleeve, a connecting structure and a construction method, and relates to the technical field of building reinforcing steel bar connection.The reinforcing steel bar connecting sleeve comprises a sleeve body and reinforcing steel bars to be connected, and the sleeve body comprises a sleeve body and a sealing gasket located at the end opening of the sleeve body; a closed cavity is formed in the barrel through the sealing gasket, and a cementing material is arranged in the closed cavity of the barrel; the connecting reinforcing steel bars penetrate through the sealing gasket and penetrate into the cylinder body, the connecting reinforcing steel bars are wrapped by the cementing material, and the cylinder body is connected with the reinforcing steel bars. The invention has the advantages that the cementing material is injected into the sleeve in advance, only the reinforcing steel bar is inserted during installation, the installation is convenient, and the connection is reliable; due to the structure of the sealing gasket, little cementing material leaks out, the connection of the sleeve is visually checked due to the arrangement of the material bolt hole, and compared with an existing grouting sleeve, the connection quality is better guaranteed; the sleeve can be applied to a cast-in-place environment and a prefabrication environment, and the other end of the sleeve is provided with ports in different forms, so that the sleeve can be suitable for various occasions and is convenient to install and efficient in connection.

The utility model discloses a kind of for joist pulls out column's underpinning jacking platform, including frame body underpinning platform and jacking platform;Frame body underpinning platform is set to the lower outer periphery of column to be constructed, and by four steel columns fixedly supported on foundation respectively arranged at its corner position;Jacking platform is set to the upper outer periphery of column to be constructed, jacking platform is connected by being anchored with the column to be constructed by multiple along its circumferential uniform setting of planting nail, and the gap between jacking platform and the column to be constructed is filled with grouting material;Four corner positions between the frame body underpinning platform and the jacking platform are respectively provided with underpinning support, and four edges of the frame body underpinning platform and the jacking platform are respectively provided with vertical jack.The utility model guarantees the effective connection of underpinning platform and the upper structure of column to be constructed, realizes the jacking unloading of upper structure of column to be constructed, and effectively reduces the operation risk in jacking unloading construction process.

This utility model discloses a protective baffle for flange production in the petrochemical industry, relating to the technical field of flange production equipment in the petrochemical industry. The protective baffle includes a main protective plate with a mounting plate fixed to its bottom, the mounting plate having multiple mounting openings. A supporting plug-in protective plate is connected to the inner ring of the main protective plate, and an upper protective plate is connected to the top of the supporting plug-in protective plate. Connecting rings and connecting protrusions are respectively provided on the sides of the main protective plate. The connecting rings have snap-fit ​​openings that match the connecting protrusions, and a first fixing component is also provided on the connecting rings. A second fixing component is provided on the front of the main protective plate. This utility model achieves height adjustment of the supporting plug-in protective plate through the second fixing component, and enables rapid connection of multiple protective baffles through the connecting rings, connecting protrusions, and the first fixing component. It solves the problems of incomplete functionality and inconvenient connection of existing protective baffles, and has the advantages of convenient adjustment, efficient connection, and comprehensive protection.

The utility model discloses a kind of connection structure of energy storage battery pack liquid cooling plate and energy storage battery pack module, including aluminum extrusion cold plate and the battery module of being located at its top, aluminum extrusion cold plate both ends are equipped with several fixed holes, fixed hole is clamped with fixed part, fixed part is welded in fixed hole, bolt is inserted in the mounting hole of battery module outer side, bolt hole is set in the center of fixed part, bolt is rotated with its corresponding bolt hole, it is related to new energy battery energy storage system technical field, simplify the complex structure of relying on multiple components welding in prior art, design is embedded into cold plate using single diamond connecting piece, cancel beam and redundant components such as back plate, improve sealing performance and assembly efficiency by threaded connection structure, adapt to the demand of new energy automobile battery module to lightweight, high-integration thermal management system, optimize part structure, processing technology and assembly process, realize efficient, compact and high-reliability connection.

This invention belongs to the field of organic synthesis and relates to a [3+2] orthogonal cycloaddition method for the reaction of an active amino acid ester with a diazo compound and its application in synthetic chemistry. The method comprises: under inert gas protection and in the presence of a base and solvent, contacting the active amino acid ester with a diazo compound to undergo a [3+2] orthogonal cycloaddition reaction to obtain the 1,2,4-triazole compound represented by Formula I. The method of this invention uses readily available active amino acids and diazo compounds as starting materials, enabling the efficient and selective synthesis of highly functionalized, fully substituted 1,2,4-triazoles, and achieving a rapid and efficient orthogonal connection between two molecules linked to the diazo compound and the active ester.

This invention provides a PCB board processing system and method, comprising: a loading mechanism, a first processing mechanism, a second processing mechanism, a third processing mechanism, an unloading mechanism, and a transmission mechanism. The first processing mechanism includes a first loading feeder, a first clamping assembly, and an adhesive suction cup; the second processing mechanism includes a second loading feeder, at least two film-peeling grippers, and foam transfer grippers; the third processing mechanism includes a resistor bending assembly and an unloading gripper; and the transmission mechanism includes a second clamping assembly and a third clamping assembly. This invention can complete a complete, high-precision, and high-efficiency PCB board processing flow, achieving efficient connection between the various processing mechanisms and realizing continuous processing. Compared with conventional processing technologies, this application enables fully automated processing with seamless connection between each process, significantly shortening the processing cycle and thus meeting the needs of mass production. Furthermore, it also possesses significant advantages such as strong controllability, strong compatibility, wide applicability, and stable processing quality.

The utility model discloses a quick connecting structure of a tool bit and a tool handle for a hair removing tool, which comprises a tool bit rear seat, a handle is arranged on one side of the back of the tool bit rear seat, a connecting assembly is arranged between the handle and the tool bit rear seat, and the connecting assembly comprises a clamping block, a connecting frame and a connecting plate. The tool bit has the advantages that the connecting assembly composed of the clamping block, the connecting frame and the connecting plate is installed between the handle and the tool bit rear seat, so that when the tool bit rear seat is connected with the handle, rapid connection can be achieved in a direct inserting mode, tedious screwing operation is omitted, and the tool bit rear seat is convenient to use. Compared with the prior art, the tool bit rear seat and the handle are connected in a short time, meanwhile, the tool bit rear seat and the tool bit front seat are connected through the elastic piece, the linkage plate and the blade installation plate, an original button on the tool bit rear seat and an elastic assembly are integrally spliced, connection between the tool bit rear seat and the handle is more efficient, and the connection efficiency is higher.

The present disclosure relates to polyquinoxalines containing basic groups, which are obtained by copolymerization of a dioxinone monomer and a tetramine monomer. The present disclosure also relates to proton exchange membranes formed from the polyquinoxalines containing basic groups. The polyquinoxalines containing basic groups provided by the present disclosure have excellent mechanical strength, thermal stability, chemical stability and phosphoric acid doping rate, while having site-controllable basic groups, and have broad application prospects.

The utility model discloses a protective net structure for constructional engineering construction, which relates to the technical field of protective net installation and comprises a protective net consisting of a net cloth main body and an I-shaped reinforcing ring, and the I-shaped reinforcing ring is pressed and fixed on the edge of the net cloth main body and penetrates through the upper surface and the lower surface of the net cloth main body. The plurality of I-shaped reinforcing rings are arranged along the edge track of the mesh cloth main body, the mesh cloth main body is connected with a quick-mounting assembly through the I-shaped reinforcing rings, and the quick-mounting assembly is used for realizing the mounting connection of the protective net and a steel pipe. According to the utility model, efficient connection between the protective net and the steel pipe can be realized by arranging the quick-mounting assembly, compared with the traditional binding operation of iron wires or binding bands, the whole mounting operation is easier and more convenient, the situation of mounting looseness can be effectively avoided, and the mounting efficiency and stability of the protective net can be further improved.

This utility model relates to the field of transfer equipment technology, specifically disclosing a two-stage telescopic mechanism. The mechanism includes a fixed frame, a first lifting frame, a second lifting frame, and two drive units. The fixed frame includes two first male connectors. The first lifting frame includes a first frame plate, one surface of which is fixed with two first female connectors that slide in cooperation with the first male connectors, and the other surface of which is fixed with two second male connectors. The second lifting frame includes a second frame plate, one surface of which is fixed with two second female connectors that slide in cooperation with the second male connectors, and its bottom has a through-hole, with the two second female connectors located on opposite sides of the through-hole. One drive unit is fixed to the fixed frame and located between the two first male connectors, and the other drive unit is fixed to the first lifting frame and at least partially passes through the through-hole. This mechanism simplifies the specific structure, reduces the space occupied, and achieves precise transfer of products to be processed.

The invention discloses composite foam as well as a preparation method and application thereof. The structure of the composite foam comprises a metal material which is selected from a metal simple substance or a metal alloy; the hollow glass microspheres and the reinforcing filler are dispersed in the metal material; wherein all the hollow glass microspheres are embedded in the metal material. In the composite foam, a composite cavity is formed by using the preformed hollow glass microspheres and stacking gaps among the microspheres, so that the density of the composite foam is reduced, and the strength and functionality of the composite foam are also ensured; connection enhancement of the preformed hollow microspheres is synchronously achieved through the metal material deposition process, and the process is convenient and efficient through connection of the reinforcing filler and the hollow microspheres.

The invention discloses a human body profiling maritime wounded person rapid transfer cabin and a back conveying method, and belongs to the technical field of maritime medical rescue equipment.The human body profiling maritime wounded person rapid transfer cabin comprises a lower cabin body, an upper cabin body, an internal functional assembly and an external safety assembly.The outline of an inner cavity of the lower cabin body is constructed to be of a segmented variable cross-section structure matched with the shape of a human body; a head area, a shoulder area, a hip area and an ankle area are sequentially formed; the upper cabin body is fixedly connected to the upper edge of the lower cabin body through a sliding tightening waterproof clamping groove. The internal function assembly is fixedly arranged in the lower cabin body through a limiting clamping groove, and the external safety assembly is fixedly arranged outside the lower cabin body. According to the human body profiling marine wounded rapid transfer cabin and the back-delivery method, through the integrated design, the wounded can be seamlessly, rapidly and safely transferred from a shore to a rescue ship in the whole process, and the problems that in the prior art, the transfer link is disjointed, the efficiency is low, and the secondary injury risk is high are effectively solved.

The utility model discloses a kind of electric power use buried PE electric power pipeline, belong to PE electric power pipeline technical field.The device includes pipeline, and the pipeline one end coaxial fixed sleeve is connected with elastic joint, the elastic joint includes the fixed part of being fixedly arranged around the side surface of pipeline, and the connecting part not directly connected with the end of pipeline, and the outside sleeve of pipeline is connected with the tightening member for fixed connecting part.The utility model in use, elastic joint contains fixed part and connecting part, when connecting, complex operation is not needed, staff only needs to drag auxiliary belt, can easily drive connecting part to separate from fixed part, without laboriously manual turning, and then use tightening member to tighten, it can be.Connecting part is designed to be stacked outside the fixed part, which reduces the transportation space occupation and allows the staff to quickly turn the connecting part to the adjacent pipeline side to complete the connection. This simple connection method shortens the pipeline laying time and reduces the construction cost.

The utility model provides a pneumatic membrane steel cable adjusting device. The pneumatic membrane steel cable adjusting device comprises a connecting cable, a traction mechanism and a base layer embedded structure. A buckle structure is arranged on at least one end of a connecting cable; one end of at least one traction mechanism is connected to the connecting cable, so that the other end of the traction mechanism is used for receiving external traction to drive the connecting cable to approach the embedded part, the stress direction of the connecting cable in the traction process can be changed, and the stress of the connecting cable is transferred through the traction mechanism; according to the inflatable membrane traction device, the buckle structures of the connecting cables are not occupied during traction, the relative position and the installation direction of the connecting cables and the inflatable membrane can be adjusted, the connecting cables can be rapidly and detachably connected with the embedded parts, the operation steps in the traction process are effectively reduced, and the installation efficiency of the connecting cables is improved; a net cable system can be formed on the surface of the inflatable membrane, and stable installation of the inflatable membrane is achieved.

The utility model discloses oat grass harvesting and cutting integrated machine relates to oat grass harvesting technical field, including base, one side of base is equipped with conveying box fixedly, the middle part of conveying box both sides is equipped with support plate fixedly, and the support plate rotation is equipped with the wheat support between two, the inside of conveying box is equipped with two interval even conveyer belt, the bottom of conveying box is equipped with feed hopper fixedly, the utility model has the advantages of: realized the integration of harvesting and cutting operation, this design not only reduced the overall difficulty of operation greatly, also reduced the potential safety hazard significantly, avoided the need of manual frequently to shift forage from the harvesting area to the cutting area, saved time and manpower, effectively prevented the occurrence of accident, and this continuous operation mode ensured the efficient link of harvesting and cutting link, provided strong guarantee for overall operation efficiency.

The utility model belongs to the technical field of bridge telescopic water guide, and particularly relates to a railroad bridge telescopic water guide device which comprises section steel and a stainless steel water guide plate, the section steel is arranged on two adjacent bridge bodies, and the stainless steel water guide plate is arranged between the section steel on the two adjacent bridge bodies. The profile steel comprises profile steel A and profile steel B, the profile steel A is fixedly connected to a bridge body through an anchoring assembly, the profile steel B is pressed and buckled on the profile steel A to form a profile steel box body, and the stainless steel water guide plate is fixed between the profile steel A and the profile steel B; a dustproof cover plate is further arranged above the profile steel on every two adjacent bridge bodies and fixedly connected with the profile steel A. The profile steel is formed by pressing and buckling the profile steel A and the profile steel B, and is convenient, fast, safe and firm to install; the stainless steel water guide plate greatly prolongs the service life of the telescopic water guide device, and solves the problems that a rubber strip is prone to aging and weathering in the using process.

The invention provides an automatic assembling system and method for a motor rotor shaft. The automatic assembling system comprises a rack assembly, and a mounting table top is formed above the rack assembly. The fixing mechanism is located above the mounting table top, the servo motor is located above the fixing mechanism, and a certain distance is formed between the servo motor and a motor rotor shaft; a plurality of feeding rotary disc assemblies and clamping jaw grabbing mechanisms are arranged on the mounting frame, and a workpiece taking table top is arranged between the mounting frame and the fixing mechanism; the servo sliding table mechanism is located on the side, away from the feeding rotary disc assembly, of the clamping jaw grabbing mechanism, and the servo sliding table mechanism extends towards the part taking table top; and the pressing head mechanism is movably connected with the pressing head sliding table, and the pressing head mechanism is provided with a piece taking position located above the piece taking table top and a pressing position located between the servo motor and the motor rotor shaft. The problem of low assembly precision caused by much manual intervention in the new energy motor rotor shaft assembly process in the prior art is solved.

This invention provides an indoor air conditioning unit and an air conditioner having the same, relating to the field of air conditioning equipment technology. It is designed to address the problem of damage to the middle frame, electrical control box, and left evaporator bracket of existing indoor air conditioning units during routine handling and installation. The unit includes a base, a middle frame covering the base, support components disposed between the base and the middle frame, and an inner component fixedly disposed relative to the base. Support components are provided at both ends of the middle frame, and the inner component is located between the two sets of support components. The support components include a middle frame support frame and a buffer component mounted on the middle frame support frame. The middle frame support frame is fixedly installed on the middle frame, and at each end of the middle frame, from the end of the middle frame towards the inner component, the buffer component protrudes from the corresponding middle frame support frame. The inner component includes the electrical control box and the left evaporator bracket. This invention can reduce damage to the middle frame, electrical control box, and left evaporator bracket of the indoor air conditioning unit during routine handling and installation.

The application discloses a card development method and device, equipment, storage medium and program product, and relates to the technical field of card development. The method comprises the following steps: triggering the operation of pulling a target card library in an interactive page of a browser to obtain the target card library from a server; a code editing tool stores the target card library in a local file system; based on the target card library stored in the local file system, triggering the display operation of the target card in the interactive page to display the target card in the interactive page; in response to the front-end building tool monitoring that the file corresponding to the target card in the local file system is modified, sending a hot update message to the browser, and the hot update message is used to instruct the browser to refresh the target card displayed in the interactive page based on the edited file; and based on the code editing tool, saving the target card library after editing. Therefore, the fluency and overall efficiency of card development are improved.

The application discloses a post-pulling tieback and pull hook system and a construction method, relates to the technical field of building construction, and comprises a pulling tendon arranged close to one side wall plate and at least two pull hooks arranged on the pulling tendon. One end of the pull hook is tied on the vertical tendon of the pulling tendon and the wall plate close to one side of the pulling tendon and is hooked on the vertical tendon. The other end of the pull hook is hooked on the steel bar on the wall plate away from the pulling tendon. After the pull hook is tied with the vertical tendon and the pulling tendon, the pulling tendon can be lifted, the pull hook can be obliquely pulled tight, the pull hook does not need to be bent, the tieback strength is improved, the lock sleeve or the pull hook does not need to be accurately pre-buried when the formwork is poured, the problems, such as displacement, deflection and misplacement of the pre-buried part caused by concrete vibration, are avoided, and the oblique pull hook tight mode is adopted to improve the reliability of the tieback.

The utility model relates to the technical field of project lamps, and discloses an integrated project lamp which comprises a baffle, a welding lamp body and a support, welding plug pieces are arranged on the two sides of the welding lamp body in a welding mode, rotating discs are fixedly arranged in the middles of the two sides of the two welding plug pieces, circular rings are movably arranged on the opposite sides of the two rotating discs in a sleeved mode, and the two sides of the two rotating discs are fixedly connected with the baffle. The two sides of the support are rotationally arranged on the opposite sides of the two rotating discs correspondingly, the power box is arranged in the middle of the inner bottom face of the support through bolts, the baffle is fixedly arranged on the periphery of the welding lamp body, and the frame plate is fixedly arranged at the upper end of the welding lamp body. According to the project lamp, the welding technology is adopted, the lamp body and the plug are welded into a whole, the seamless lamp body is formed, the waterproof performance of the lamp body is remarkably improved, the highest IP68 grade is achieved, the step of traditional screw fastening is omitted, and therefore the installation efficiency is improved, and time and cost are saved.

The utility model discloses a kind of multi-structure low-voltage single-phase current transformer, including the current transformer body consisting of closed housing and built-in mutual inductance component, the window shape of the current transformer body is compatible with the cross-sectional shape of cable or copper bar, the cable or copper bar passes through the window and is installed on the current transformer body, and the top surface of the current transformer body is equipped with the foolproof wiring port and screw wiring port connected with mutual inductance component.This utility model is a kind of multi-structure compatible double-wiring selectable integrated low-voltage single-phase current transformer, cable / copper bar one-key switching installation and screw / foolproof terminal can be selected wiring can be realized, while the utility model structure is simple, low in cost, improve wiring efficiency and operation safety, solve the existing low-voltage single-phase CT installation compatibility, secondary wiring no selection, screw wiring loose problem.

This invention relates to an intelligent continuous production method for Xiaochaihu granules, comprising the following steps: sieving and pulverizing the filler, and conveying it to a preparation silo for airflow premixing; adding the extract to an extract tank and stirring until uniformly mixed; conveying the premixed filler and extract to a mixer, mixing uniformly, adding a wetting agent, and mixing to obtain a soft material; simultaneously premixing the filler for the next batch; conveying the soft material to a granulator for granulation, and feeding the granules into a fluidized bed hot air section for drying; conveying the filler for the next batch to the mixer; after the soft material is conveyed, sequentially conveying the extract and wetting agent to prepare the soft material for the next batch; after the granules are transferred to the fluidized bed cold air section, granulating the soft material for the next batch and feeding it into the fluidized bed hot air section; sieving to obtain the final product. This continuous production method improves production efficiency while also enhancing product quality and stability, and significantly saves materials and energy.

This invention discloses a method for manufacturing a circuit board and the circuit board itself. The method includes the following steps performed sequentially: taking a core board with an inner patterned circuit layer on its surface; installing a chip: machining a recessed groove at a predetermined position on the core board and inserting the chip into the recessed groove; laminating: laminating and fixing a layer board onto the surface of the core board to drive the chip to be hidden inside the layer board; conducting: setting patterned circuits and connecting holes on the surface of the layer board, with the connecting holes corresponding to the chip, and the hole walls of the connecting holes being able to be copper-clad to drive the patterned circuits to connect with the chip, thereby forming a multilayer board; taking a copper block with a thickness matching the thickness of the multilayer board; installing the copper block: embedding and installing the copper block into the multilayer board; surface circuit processing: machining an outer patterned circuit layer on the surface of the multilayer board. This method can achieve efficient circuit connection, shorten the signal transmission path, reduce delay and reflection loss, and solve the problem of copper block lamination, thereby improving quality and efficiency.

A magnetic suction wiring device for a soil resistivity tester comprises a male connector and a female connector, the female connector comprises a first insulating shell, a magnetic conductive metal ring, a second insulating rubber mat, a magnetic suction ring, a first insulating rubber mat and a nut, and the nut is connected with an electrode of the resistivity tester. The magnetic conductive metal ring, the second insulating rubber pad, the magnetic attraction ring, the first insulating rubber pad and the nut are sequentially arranged in the first insulating shell in a sleeving mode from top to bottom. The male joint comprises a silica gel sealing ring, a second insulating shell, a fourth insulating rubber mat, a permanent magnet, a third insulating rubber mat and a spring ejector pin, the silica gel sealing ring, the second insulating shell, the fourth insulating rubber mat, the permanent magnet and the third insulating rubber mat are hollow at the axis, and the spring ejector pin penetrates through the hollow part; the top of the spring ejector pin is hemispherical, the middle part of the magnetic attraction ring is provided with a hemispherical recess, the outer circumferential surface of the first insulating shell is provided with an L-shaped guide groove, and the inner circumferential surface of the second insulating shell is provided with a raised buckle. According to the utility model, through double insurance of magnetic attraction and mechanical locking, butt joint is completed within one second, and the operation intensity is reduced.

The utility model belongs to chemical organic synthesis equipment technical field discloses a kind of synthesis device of methyl acetate, reaction kettle, plate and frame filter press, distillation kettle, stainless steel condenser, product receiving kettle, methylene chloride receiving kettle and vacuum pump;The outlet valve of the bottom of the reaction kettle is connected to the inlet end of the plate and frame filter press by pipeline;The outlet end of the plate and frame filter press is connected to the inlet end of the distillation kettle by pipeline;The outlet end of the top of the distillation kettle is connected to the inlet end of the stainless steel condenser by pipeline;The outlet end of the stainless steel condenser is connected to T type control valve;The first outlet end of the T type control valve is connected to the inlet end of the methylene chloride receiving kettle by pipeline;The second outlet end of the T type control valve is connected to the inlet end of the product receiving kettle by pipeline;The inlet end of the top of the product receiving kettle is connected to the vacuum pump by pipeline.

This application relates to the field of structural construction, and in particular to a prefabricated beam-column structure and its construction method. The prefabricated beam-column structure includes a structural column, a protruding column, multiple limiting rods, a drive disc, and a crossbeam. The protruding column is connected to the periphery of the structural column. Multiple first arc-shaped grooves are formed at the ends of the protruding column away from the structural column, and the ends of the limiting rods are slidably connected to the first arc-shaped grooves. The drive disc is rotatably connected to the ends of the protruding column away from the structural column. Multiple second arc-shaped grooves are formed through the surface of the drive disc. When the drive disc rotates relative to the protruding column, the multiple limiting rods converge or diffuse along the extension directions of the first and second arc-shaped grooves. A limiting groove is formed at the end of the crossbeam. The limiting groove allows multiple limiting rods to pass through. A limiting ring is provided on the inner wall of the limiting groove. A slot is formed on the side wall of the limiting rod for the limiting ring to engage. A limiting mechanism for fixing the rotational position of the drive disc is provided on the side wall of the drive disc. This application improves the problem of inconvenient assembly and disassembly of beam-column structures.