32results about How to "Improve structural quality" patented technology

The invention discloses a wire arranging device for an inductance coil, which can ensure that an inductance wire is wound with uniform tension through a wire winding assembly and a reciprocating assembly which are accurately controlled, and reduce damage caused by wire crossing and stretching at the same time, and a reciprocating screw rod and a reciprocating block system which are driven by a servo motor are arranged, so that the winding efficiency is improved. In addition, the extrusion block and the limiting ring structure in the auxiliary assembly allow automatic adjustment of the extrusion force to adapt to the change of the diameter of the inductance wire, the self-adaption function reduces wire damage caused by mismatching of tension, and the winding quality of the inductance wire is improved. The monitoring assembly improves the control precision of the production process through a real-time thickness detection and marking system, the automation level of operation is improved, the labor cost is reduced, and the production efficiency and the material utilization rate are greatly improved through accurate monitoring and real-time adjustment. And the method has important significance for meeting high-standard industrial application requirements.

The utility model discloses a forming device for corrugated paper production, and relates to the technical field of forming devices. Connecting plates are symmetrically and fixedly connected to the upper side of the supporting frame, two conveying mechanisms are arranged between the connecting plates, a first extrusion mechanism, a gluing mechanism and a second extrusion mechanism are sequentially arranged in the middle of each connecting plate from left to right, a cooling assembly is arranged on the upper side of the conveying mechanism on the right side, and evenly-distributed supports are fixedly connected to the lower side of the supporting frame. The first extrusion mechanism comprises a main extrusion shaft and an auxiliary extrusion shaft, the main extrusion shaft and the auxiliary extrusion shaft are rotationally arranged in the middle of the connecting plate, the first extrusion mechanism is arranged, transmission is stable, the rotating speed of the corrugated roller can be effectively controlled, the meshing retention time is guaranteed, and the situation that the forming effect of corrugated paper is not obvious is avoided; the structure quality and the using effect of the corrugated board are effectively improved, the gluing mechanism is arranged, the problem that manual coating is prone to causing uneven coating is solved, the using effect of the corrugated board is prevented from being affected, and practicability is high.

The application discloses a die-casting device for window sliding wheel machining, which comprises an operating machine table arranged on the ground, a die-casting base fixedly arranged at the middle of the bottom of the inner cavity of the operating machine table, and a limiting guide rod fixedly arranged at the top of each corner of the die-casting base, and belongs to the technical field of die-casting. The die-casting device for window sliding wheel machining is characterized in that the upper die, the hydraulic rod, the lower die mechanism and the electric telescopic rod are matched to realize efficient and stable die-casting. During die-casting, the structures are cooperatively driven to automatically circulate and flow the cooling liquid, the cooling and shaping are rapidly completed, the processing efficiency is effectively improved, the circulating cooling liquid can drive the inside of the lower die mechanism to generate high-frequency oscillation, the internal bubble defects of the casting are eliminated, the product structural strength and surface quality are improved, meanwhile, the cooling liquid is uniformly disturbed in the die to improve the heat exchange efficiency, the temperature of the cavity is rapidly and evenly balanced, the deformation and cracking of the casting are prevented, the forming precision and product qualification rate are ensured, and the overall structure is simple, stable and reliable in operation.

The invention provides a nano material for a cutter and a preparation method and a product of the nano material, and relates to the technical field of metal materials. The nanometer material is prepared from the following raw material components in parts by weight: 60 to 80 parts of graphene, 10 to 25 parts of nanometer magnesia powder, 10 to 20 parts of nanometer cobalt powder, 5 to 10 parts of lanthanum oxide, 10 to 20 parts of yttrium oxide, 20 to 35 parts of chromium carbide, 20 to 35 parts of a ball milling regulator, 5 to 15 parts of iron powder, 1 to 3 parts of calcium sulfide and 0.5 to 1.5 parts of boron powder. The average particle size of the chromium carbide is 20-50nm. All the components are dispersed and then subjected to intermittent ball milling treatment to obtain the nanometer material, the nanometer material is used for preparing the cutter by controlling the sintering temperature, the heating rate and the time and adopting a gradient heating and gradient cooling method, so that the internal structure of the cutter is more uniform, and the mechanical property is remarkably improved.

The embodiment of the invention relates to the technical field of photoelectric detection, in particular to a laser-induced periodic structure enhanced photoelectric detector and a preparation method thereof, and the photoelectric detector comprises a substrate layer, a grating template layer, a bottom surface metal layer, a semiconductor layer and a surface metal layer from bottom to top; injection light is injected into the surface metal layer, surface plasmon polariton resonance is excited due to the nano grating structure of the surface metal layer, the absorption efficiency of the injection light is improved, and a wrinkle-shaped nano grating structure is arranged among the bottom surface metal layer, the semiconductor layer and the surface metal layer; the bottom surface metal layer, the semiconductor layer and the surface metal layer form a Fabry-Perot cavity structure, and after injected light enters a cavity, standing waves are formed in the cavity and interact with a material to generate an intra-cavity resonance enhancement effect; by adjusting the period of the grating structure of the grating template layer and the thickness of the semiconductor layer, multi-wavelength selection of the photoelectric detector can be realized. The photoelectric detector is simple and convenient to prepare, can be flexibly regulated and controlled and is suitable for batch production.

The invention relates to the field of railway vehicles, and provides a vehicle roof structure, a vehicle body and a railway vehicle. The two sides, extending in the longitudinal direction of the vehicle body, of the top plate are connected with the camber beams in a welded mode; the mounting beam is arranged on the side, opposite to the bent beam, of the top plate and suitable for being connected with roof equipment. According to the mounting beam, mounting bases of all devices are integrated in a unified mode, the number of welding bases is reduced, meanwhile, welding defects caused by large welding amount and large deformation are avoided, the overall structure quality and stability of a car roof and the bearing capacity of the car roof are improved, the utilization efficiency of the car roof space is improved, the mounting process of the car roof devices is simplified, and the cost is reduced. And the installation time and cost are reduced.

The present invention belongs to the technical field of bus rollover collision safety, and specifically relates to a bus rollover collision energy absorption structure with efficient and reasonable energy absorption characteristics during rollover collision. The structure includes a diagonal brace beam, a bent beam, a first energy absorption box, a second energy absorption box, a third energy absorption box, and a fourth energy absorption box, and each component of the structure is connected by welding. Among them, the diagonal brace beam and the bent beam are made of "day"-shaped hollow steel pipes. Among them, the first, second, third, and fourth energy absorption boxes are all composed of rectangular cross-section thin-walled trapezoidal steel pipes. To accurately control its energy absorption mode and the maximum bearing capacity during axial crushing, trapezoidal induction grooves are provided on the pipe wall, and the induction grooves are only provided in two wider planes of the energy absorption box symmetric about the central axis, and no induction grooves are provided on the other two planes. The present invention is a high-efficiency energy absorption structure specifically used for absorbing collision energy during the rollover of a bus, so as to minimize the collision energy transmitted into the occupant survival space and protect the safety of the occupants.

The invention belongs to the technical field of arch bridge construction, and particularly relates to an arch bridge last section splicing and closure coordination operation method which comprises the following steps: step 1, early-stage preparation: accurately measuring an arch bridge last section, and determining a splicing position and a closure point; a high-precision measuring instrument is used, a laser range finder and a total station are adopted, and materials and tools needed by splicing are prepared. According to the last arch bridge section splicing and closure coordination operation method, the splicing and closure precision is improved, and the structural safety is ensured. The construction process is good in coordination, the arch bridge sections are allowed to be finely adjusted in a three-dimensional space, the splicing precision is ensured, and through accurate adjustment and positioning, structural deviation and accident risks possibly occurring in the construction process are reduced, and the construction difficulty and risks are reduced. And the accurate butt joint operation is favorable for improving the overall structural quality and prolonging the service life of the arch bridge, and the construction period is shortened. The welding quality is ensured, and the construction quality is guaranteed through nondestructive testing.

This invention relates to the field of water treatment chemicals, and discloses a hydroxyl-based coagulant aid, its preparation method, and its application. The coagulant aid is composed of solid polyaluminum chloride, polyvinyl alcohol, urea, an aqueous solution of alkyl glycosides, sodium gluconate, sodium tetraborate decahydrate, triethanolamine, deionized water, and glacial acetic acid for pH adjustment. This invention reduces the system viscosity through urea, and, combined with the spatial isolation of alkyl glycosides and the coordination chelation of sodium gluconate, inhibits the salting-out and phase separation of polyvinyl alcohol induced by high concentrations of polyaluminum chloride. The system utilizes sodium tetraborate decahydrate to construct a pH-regulated delayed cross-linking mechanism, maintaining liquid-phase homogeneity under slightly acidic conditions. When introduced into neutral or weakly alkaline water, the agent can undergo in-situ cross-linking with the water to form a network structure, which, in conjunction with inorganic aluminum salts, achieves the netting and sedimentation of suspended particles. This invention balances long-term storage stability in high-salt systems with highly efficient turbidity removal performance.

This invention relates to the field of automotive air conditioning manufacturing technology, and discloses an automotive air conditioning pipe crimping equipment, comprising a feeding device, a processing device, and a unloading device. The processing device includes end leveling, upsetting, radial extrusion, and deburring units, as well as a three-axis transfer claw. The unloading device integrates unloading and visual inspection units. The equipment achieves multi-process automatic flow of pipe fittings through the three-axis transfer claw, sequentially completing pipe end leveling, upsetting, radial extrusion forming, and deburring, ensuring processing coaxiality, avoiding pipe eccentricity and cracking, and improving pipe end forming accuracy and sealing performance. Simultaneously, online quality inspection through visual inspection during the unloading stage automatically identifies defective products. The entire machine integrates feeding, multi-process forming and finishing, online inspection, and automatic unloading, achieving a high degree of automation, reducing labor intensity, and improving production efficiency and product yield.

Embodiments of the present disclosure provide a redistribution layer structure. The redistribution layer structure includes a first metal layer, a first dielectric layer disposed on the first metal layer, a second metal layer disposed on the first dielectric layer, and a second dielectric layer disposed on the second metal layer. A coefficient of thermal expansion of the first dielectric layer is less than a coefficient of thermal expansion of the second dielectric layer.

The invention relates to the technical field of cement-based building materials, in particular to anti-disturbance ultra-high-performance concrete for wet joint cast-in-place and a preparation method of the anti-disturbance ultra-high-performance concrete for wet joint cast-in-place. Composite cement and a composite admixture are matched with high-quality fine aggregate, internal curing aggregate is prepared to achieve humidity regulation and control, and a composite expanding agent is matched to inhibit concrete shrinkage, so that the anti-disturbance ultra-high-performance concrete is obtained. The special water reducing agent is used for adjusting the construction performance of the concrete, and is matched with the early-strength setting-adjusting admixture, so that high early strength, low shrinkage and constant setting time of the ultra-high performance concrete are realized, and the influence of external disturbance on road and bridge construction is reduced.

The application discloses a double-reflow mode threshing and winnowing process, which is applied to the end of a threshing and winnowing process, wherein the double-reflow mode comprises flag reflow and leaf reflow, and the end of the process comprises six devices, namely, a second-to-last threshing machine, a fourth-to-last winnower, a third-to-last winnower, a first-to-last threshing machine, a second-to-last winnower and a first-to-last winnower; the six devices at the end of the process participate in a circulation process of the double-reflow mode; ten double-reflow processes are formed by combining different arrangement processes and reflow modes of the six devices at the end of the process, so that the quality of tobacco leaf structure can be improved and the loss of tobacco leaves can be reduced without increasing the number of threshing machines and the number of times of winnowing.

The application discloses a construction method of a space special-shaped tree column structure, which comprises the following steps: after a layer of steel rod members are installed and a first layer closed loop structure is formed, the steel rod members are continuously assembled to the next layer; after the steel rod members of the next layer form a second layer closed loop structure, butt joints of vertical rod members of the steel rod members of the first layer closed loop structure are welded; after the butt joints of the vertical rod members are welded, butt joints of horizontal rod members of the layer of steel rod members are welded; after the butt joints of the horizontal rod members are welded, the next layer of steel rod members is continuously assembled on the basis of the second layer closed loop structure; after a third layer closed loop structure is formed, the butt joints of the steel rod members of the second layer closed loop structure are welded; and the welding is sequentially and intervally performed until the last layer of steel rod members is welded. The application can reduce or avoid the welding seam deformation of the complex space special-shaped structure, and greatly improves the construction quality.

The utility model provides a grouting device for pavement cement stable structure layer construction, and relates to the field of pavement construction. The grouting device is installed on the existing water-stable paver and comprises a base, a grouting barrel and a slurry dripping mechanism, the base is installed on the water-stable paver, the grouting barrel is arranged on the base, and the slurry dripping mechanism is arranged on the outer side of the grouting barrel; the slurry dripping mechanism comprises a horizontal guide pipe, a vertical guide pipe, a liquid outlet hose and a slurry dripping head, the horizontal guide pipe is horizontally connected to one side of the base and can move on one side of the base in the horizontal direction, and the vertical guide pipe is vertically connected to one end of the horizontal guide pipe and can move at one end of the horizontal guide pipe in the vertical direction; the bottom end of the vertical guide pipe is connected with the slurry dripping head; one end of the liquid outlet hose is connected to a liquid outlet pipe of the grouting barrel, and the other end of the liquid outlet hose is communicated with the slurry dripping head. A traditional construction technology can be improved, cement paste is sprayed to the edge of a structural layer in the construction process, efficiency is improved, and meanwhile the edge appearance quality and the structural quality of a water stability project are effectively improved.

The utility model belongs to the technical field of building construction, and discloses a basement concrete structure which comprises a basement concrete bottom layer, two basement concrete side layers are arranged on the two sides of the basement concrete bottom layer respectively, two pouring cavities are formed in the two basement concrete side layers respectively, water guide plates are arranged in the two pouring cavities respectively, water guide grooves are formed in the water guide plates, and the water guide grooves are communicated with the basement concrete bottom layer. The basement concrete bottom layer is provided with a flow guide cavity, the two ends of the flow guide cavity are communicated with the pouring cavity, and the middle of the pouring cavity is provided with a mounting cavity. According to the scheme, the purposes that water seepage can be accurately detected in the using process, and accurate drainage is achieved are achieved; the basement concrete structure is prevented from being affected by moisture for a long time, the structural strength of the basement concrete structure is improved, on the other hand, drainage work can be compulsorily intervened through a water pump, drainage efficiency is improved, the basement concrete structure is not affected by the terrain of the basement concrete structure, drainage is thorough, and the dryness of a basement is improved.

The application relates to the technical field of concrete pouring, and discloses a civil construction pouring equipment and a concrete pouring method, which comprises a bottom plate, a mixing assembly arranged at one end of the top of the bottom plate, a material barrel arranged at the middle of the top end of the mixing assembly, a conveying assembly provided with a high-pressure pump and a first material pipe connected with the bottom of the material barrel, a second material pipe connected with the first material pipe, and a spray head connected with the tail end of the second material pipe, a transposition assembly arranged at the top of the bottom plate, an adjusting assembly arranged at the middle of the top end of the transposition assembly, a lifting assembly arranged at one end of the adjusting assembly away from the mixing assembly, and a sleeve arranged at the top of the lifting assembly and capable of ascending and descending. The civil construction pouring equipment and the concrete pouring method have high flexibility and adaptability, can meet the concrete pouring requirements of different areas, and improve construction efficiency and structural quality.

The application provides a preparation method of low-cost low-leaching halogen-free flame-retardant polypropylene, and belongs to the technical field of preparation of low-cost low-leaching halogen-free flame-retardant polypropylene. The application precisely predicts the carbon layer quality by establishing a physical information neural network carbon layer heat conduction proxy model, optimizes the thread combination to improve the dispersion uniformity of the flame retardant by using a double-screw cross-section flow field graph theory dispersion analysis algorithm, controls the leaching and migration by using a microcapsule packaging technology to replace free acid sources step by step, balances the flame retardancy and impact strength by combining an adaptive formula adjustment function, and solves the technical problems of poor accuracy of the ratio of the intumescent flame-retardant system, low dispersion uniformity of the flame retardant, and inability to effectively control the leaching and migration.

The present invention belongs to the technical field of plastic pipe processing, and discloses a cooling device for plastic pipe processing, comprising a cooling mechanism, wherein the cooling mechanism comprises a water pump, the top of the water pump is fixedly connected with a water outlet pipe, and the top of the water outlet pipe is fixedly connected with a shunt pipe; a cooling method for plastic pipe processing, the cooling method is as follows: S1, first fix the device at the discharge port of a plastic pipe production device; the present invention facilitates uniform cooling of the plastic pipe body by arranging the coordination of structures such as cooling pipes and water spray holes, starts the water pump, pressurizes the cooling water through the water pump so that it enters the inside of the shunt pipe through the water outlet pipe, and moves to the inside of two cooling pipes respectively through the shunt of a shunt plate, so that the coolant is sprayed out through a plurality of water spray holes evenly distributed on the cooling pipe under the action of water pressure and gravity, and the surface of the plastic pipe body located between the two cooling pipes is evenly cooled.

This invention provides a management system for WSI pathology reports based on OFD-H. It includes a presentation layer, a business layer, a data storage layer, and a standard interface for interoperability with third-party medical systems. The presentation layer includes an editor for editing OFD reports and a WSI image reader capable of coordinate backtracking of WSI images. The business layer includes: module one for automatically generating pathology image heatmaps and textual diagnostic suggestions; module two for OFD format container encapsulation; module three for three-level streaming image backtracking; and module four for adding digital signatures and watermarks. The data storage layer is used for hierarchical storage of WSI files, ROI images, and OFD documents to meet the retrieval needs of massive multimodal data. This invention can achieve "intelligent assisted generation" of reports, "two-way interoperability" between text and images, "lightweight encapsulation" of data, and "compliant traceability" of documents.

The invention relates to the technical field of laser cladding, in particular to a heating and cooling integrated device for assisting laser cladding forming, which comprises a worktable, the heating and cooling integrated device is mounted on the worktable and is electrically connected with an induction heating controller, a robot is arranged on one side of the worktable, and the robot is electrically connected with the induction heating controller. A laser device is installed on the robot, a cladding head is installed at the movable end of the robot, the robot is electrically connected with a main control cabinet, the main control cabinet is electrically connected with a pressure stabilizing box, and the main control cabinet is electrically connected with the robot and the laser device. The heat treatment auxiliary technology is introduced to help the cladding layer to solidify, and the temperature gradient is reduced to the maximum extent to refine the grain distribution of the cladding layer, so that the high-performance cladding layer can be obtained.

The utility model discloses a five-section type opposite-pull screw rod, which relates to the field of building construction and consists of an end part child-mother threaded rod, a middle child-mother threaded rod and a screw rod which are in threaded connection and match with each other. The end part child-mother threaded rod comprises a long child-mother threaded rod, the long child-mother threaded rod is in threaded connection with a fixing nut and an arc-shaped buckle positioner, the middle child-mother threaded rod comprises a short child-mother threaded rod, and the short child-mother threaded rod is sleeved with a frustum rubber plug and a circular ring rubber plug; and the long child-mother threaded rod, the short child-mother threaded rod and the screw rod are in threaded connection in sequence. The utility model has obvious advantages in the aspects of improving the stability of the template, improving the construction efficiency, reducing the cost, improving the quality of a concrete structure and improving the construction safety, and can be widely applied to the modern building construction.

The invention discloses a curtain wall force transmission system and a construction method thereof. The force transmission system comprises a building body and a reserved window opening, a curtain wall keel is fixed to the building body, a curtain wall plate is fixed to the curtain wall keel, a window opening auxiliary frame is fixed in the reserved window opening, an adjustable supporting piece is arranged between the bottom of the window opening auxiliary frame and the reserved window opening, and a force transmission rod is connected between the curtain wall keel and the window opening auxiliary frame. The construction method comprises the following steps: fixing a curtain wall keel on a building main body; an adjustable supporting piece is arranged at the bottom of the reserved window opening of the building body; a window opening auxiliary frame is temporarily positioned and installed in the reserved window opening; the adjustable supporting piece is supported between the bottom of the window opening auxiliary frame and the reserved window opening. A dowel bar is connected between the curtain wall keel and the window opening auxiliary frame; a curtain wall wallboard is installed on the curtain wall keel; a window body is installed on the inner side of the window opening auxiliary frame. The building curtain wall has the beneficial effects that force on the curtain wall glass, the curtain wall keel and the curtain wall plate is effectively transmitted to a building main body structure, and the structural safety of the building curtain wall is improved.

The utility model relates to the technical field of cartons, and discloses a reinforced carton which comprises a box and two partition plates, a through hole is formed in the front side of the top end of the box, a first paper cover is fixedly connected to the front side of the top end of the box, second paper covers are fixedly connected to the left side and the right side of the top end of the box, and a third paper cover is fixedly connected to the rear side of the top end of the box. A third paper cover is fixedly connected to the top end of the box, a fourth paper cover is fixedly connected to the top end of the third paper cover, a notch is formed in the middle of the fourth paper cover, four triangular supports are fixedly connected to the upper side and the lower side of the interior of the box, sleeves are fixedly connected to the close sides of the two triangular supports, and rubber pads are fixedly connected to the top ends of the interiors of the sleeves. According to the carton, the top of the carton is sealed, the four corners of the carton are supported and reinforced, additional buffering protection is provided for the carton, the positions of the partition plates in the carton are adjusted, and articles in the carton are more stably fixed in respective areas.

The utility model relates to a kind of glass lifter bracket structure, belong to the component of automobile glass lifter.The relative arrangement of hanging line groove one and hanging line groove two is arranged on bracket body, cable joint spring one is set in hanging line groove one, isolation line groove is located at the front end of the outgoing wire direction of hanging line groove two, buffer block is integrally injection molded with bracket body.The advantages are novel structure, the abnormal sound and fracture problem generated in the running process of glass bracket caused by the lap joint of two cables is solved by adopting isolation line groove;By the relative arrangement of hanging line groove, the problems of cable hanging error, leading to lifting failure, rework and scrap are solved;By using the buffer block integrated with bracket, the problem of abnormal sound in the lower support point position of bracket caused by the falling of original buffer block during use is solved.The noise reduction, fatigue resistance, wear resistance and durability of glass lifter structure are improved.

The invention discloses a smoothing method for a suspension cross beam after morphology optimization, and the method comprises the steps: S1, delimiting an optimization region on a suspension cross beam mathematical model, and carrying out the morphology optimization design of reinforcing ribs in the optimization region; s2, acquiring geometric features of a plane where the optimized region is located, and converting the geometric features into a binary image; s3, calculating the maximum pixel distance H between adjacent isolated reinforcing ribs X in the binary image; s4, performing first morphological operation on the isolated reinforcing rib X in the binary image by using the circular structural element J1 to obtain an integral reinforcing rib Y; s5, extracting a central skeleton of the whole reinforcing rib Y, and obtaining a pixel length L of the central skeleton; s6, performing third morphological operation on the central skeleton by using the circular structural element J2 to obtain an optimized reinforcing rib Z; and S7, extracting numerical characteristics of the optimized reinforcing rib Z, and projecting the numerical characteristics to the digital model of the suspension cross beam to obtain the smoothed digital model of the suspension cross beam. According to the smoothing processing method for the suspension cross beam after morphology optimization, the phenomena of unsmooth morphology edges and excessive isolated areas existing after the morphology optimization design of the suspension cross beam can be effectively eliminated.

The invention relates to the technical field of image detection, can be applied to business system platforms of financial science and technology, medical health and the like, and discloses a video frame extraction method, device and equipment based on self-adaptive regularization and a medium. Performing frame normalization processing on the plurality of initial video frames to generate a plurality of standard video frames; extracting spatial features and time features of the standard video frames, and constructing a multi-resolution video feature map of the standard video frames according to the spatial features and the time features; performing multi-head self-attention regularization calculation on the multi-resolution video feature map to obtain a plurality of map regularization coefficients; performing adaptive regularization constraint processing on the standard video frame according to the image regularization coefficient to generate a plurality of regularization video frames; and performing target frame selection on the plurality of regularized video frames to obtain a target video frame corresponding to the initial video stream data. According to the invention, the accuracy of video frame extraction can be improved.

The utility model discloses a novel anti-slip wall connecting piece device which comprises a pre-buried part and an external part, the pre-buried part comprises a pre-buried sleeve, a pre-buried plug and a square nut, and the pre-buried sleeve is formed by sequentially connecting a nut containing groove, a sleeve straight section and a sleeve fixing end into a whole; the embedded plug is formed by sequentially connecting a sleeve plug and a bolt abutting foot into a whole, and the embedded plug is buckled in the nut containing groove. The external part comprises two single fasteners, a high-strength bolt, a steel pipe and two steel pipe blocking rings, and the high-strength bolt penetrates through bolt preformed holes of the two single fasteners to be sleeved with the embedded part; the steel pipe is fixed by two single fasteners, two steel pipe blocking rings are welded on the peripheral surface of the steel pipe, and the steel pipe blocking rings and the single fasteners are sequentially and alternately arranged on the peripheral surface of the steel pipe. By means of pre-burying in the early stage, cutting and hole blocking are not needed in the later-stage dismantling process, meanwhile, the anti-sliding capacity between the wall connecting piece and the steel pipe is improved, and the requirement for wall connecting is met.

The present invention relates to the technical field of large steel structure welding, and specifically to a large welding equipment, including a fixing unit and a welding unit. The present invention supports and fixes large arc parts of different sizes and curvatures by cooperating with a support block and a right-angle block, clamps and limits small arc parts of different sizes and curvatures by a moving column, so that they are in close contact with the large arc parts, and fixes the small arc parts of different sizes and curvatures by a suction frame, thereby improving the use efficiency of the equipment, so as to achieve the purpose of fixing and aligning arc-shaped steel structure components of different sizes and curvatures, thereby improving the welding quality, and cooperating with an elastic plate and a limiting sleeve plate to make the welding trajectory of the welding head the same as the size and curvature of the large arc part, so that the welding head can quickly weld the connection between the large arc part and the small arc part, while ensuring the welding quality and improving the quality of the arc steel structure after welding.