4004 results about "Lap joint" patented technology

Disclosed is a cylindrical battery, comprising a housing, bare cells, a first current collector, a second current collector, and a cover plate, wherein the housing comprises a columnar main body, with a first opening being provided in one end of the columnar main body and a second opening being provided in the other end of the columnar main body; a first full-tab is provided at one end of each of the bare cells and a second full-tab is provided at the other end of the bare cell, the first full-tab being connected to the cover plate by means of the first current collector; the other end of the columnar main body extends into the second opening to form a connecting portion, the connecting portion bends toward the first opening to form an annular connecting surface, and the annular connecting surface bends toward an axis of the columnar main body to form a bearing surface; and the second current collector comprises an outer edge which is in lap joint with the bearing surface and which is connected to the bearing surface by means of laser welding, and a protrusion protruding toward the first opening, the protrusion being connected to the second full-tab by means of laser welding. The present application uses laser penetration welding, which provides firm welding and effectively meets the requirements of high charging and discharging rates of cylindrical power batteries.

The invention discloses a stacking machine for a stereoscopic warehouse, and belongs to the field of stacking machines, the stacking machine comprises a stand column, a cargo carrying table and a lifting mechanism, a walking mechanism is arranged on the lower portion of the stand column, and the lifting mechanism is used for driving the cargo carrying table to ascend and descend on the stand column; the pallet fork is used for forking goods on the goods shelf; the device further comprises a supporting mechanism, the supporting mechanism comprises a first rotating plate, the first rotating plate is rotationally connected with the first connecting plate through a rotating rod, the two ends of the first rotating plate are each in pivot joint with a first driving rod, the other end of each first driving rod is in pivot joint with the middle of the sliding base, a supporting arm is arranged on one side of the sliding base, and one end of the supporting arm is connected with an L-shaped lap joint plate. When the stacking machine takes and places goods, the lap joint plate is in lap joint with one side of the goods shelf. By arranging the supporting mechanism, extra supporting is formed for the stand column, the force borne by the stand column is effectively dispersed, the upsetting moment of the stand column is remarkably reduced, and the structural stability and safety of the stacking machine in the running process are improved.

The invention discloses an electric power distribution method convenient for maintenance. By arranging a second threaded column (21) and an extrusion plate (22), when the second threaded column (21) rotates, the extrusion plate (22) can be driven to rotate, then the extrusion plate (22) can drive a friction pad (27) to rotate, and when the friction pad (27) is connected with the lower surface of the inner wall of a shell (1) in a lap joint mode, a support plate (17) can be fixed; and by arranging a stop block (28), when the back face of a second protection plate (10) is connected with the front face of the stop block (28) in a lap joint mode, a first threaded column (13) can be more conveniently connected with a second threaded sleeve (14), and therefore the second protection plate (10) can be better fixed. The electric power distribution method convenient for maintenance has the advantages that the structure is compact, the design is reasonable, and the practicability is high.

The invention discloses a load-variable ultra-large-capacity dry-type transformer, and relates to the technical field of dry-type transformers, the load-variable ultra-large-capacity dry-type transformer comprises three groups of main iron core columns and three groups of auxiliary iron core columns, the section of each main iron core column is in a stepped shape, and three layers of amorphous alloy belts are laminated in each main iron core column; the thickness of the middle layer of the three layers of amorphous alloy belts is set to be 1.2-1.5 times that of the two side layers, and independent lap joint pieces are arranged at the joints of the lamination sets in the auxiliary iron core column. The stepped sections of the three groups of main iron core columns are combined with the magnet yokes with thin tops and thick bottoms, so that the magnetic flux density is uniformly distributed, the capacity of a single column is improved, the problems that the capacity of a single traditional dry-type transformer is limited and the whole transformer needs to be replaced during capacity expansion are solved, the occupied area is reduced through modular splicing, the capacity of a single group of iron core columns is increased, and the no-load loss is reduced.

The invention provides a method and system for detecting the flatness of a spot welding molded surface, and the method comprises the steps: S1, reading a model, recognizing a to-be-detected welding spot file, and reading all parts under a parent level of the to-be-detected welding spot file; s2, performing interference treatment to obtain a part having an interference relationship with the to-be-detected welding spot; s3, the connecting piece is subjected to interference treatment, and a lap joint face is obtained; s4, segmenting the lap joint surface; s5, making a tangent plane of the lap joint surface and shifting up and down to obtain an up-and-down shifting surface; and S6, calculating the flatness according to the distance from the welding molded surface of the to-be-detected welding spot to the up-down offset surface. The logic of the detection scheme is simplified, automatic detection is realized, and the detection result is faster and more accurate.

Disclosed are a prefabricated / modular sauna and methods of manufacturing and assembling a prefabricated / modular sauna. For instance, a prefabricated / modular sauna may include: a base frame; a plurality of posts; a plurality of panels; a roof frame; and a roof panel. The base frame and the roof frame include beams and have beam intersections between adjacent beams, each beam intersection is formed of a lap joint and a connector. The panels are secured in post dados of the posts and beam dados of the beams. The posts are secured in notches of base frame beams and roof frame beams. In some cases, the panels include a pre-packaged sauna assembly panel. In some cases, panels and posts are secured against loading forces, lateral forces, or compression forces by (1) interconnected beams and posts in compression or tension, and (2) mechanical connectors (e.g., pins, bolts, screws).

The invention belongs to the technical field of floor support plate construction, and particularly discloses a disassembly-free bottom die steel bar truss floor support plate construction system based on an intelligent construction site, which comprises a BIM (Building Information Modeling) model driving module, a construction progress control module, an Internet of Things sensing module, a visual detection module, an evidence storage module and a cloud platform, the BIM model driving module constructs a three-dimensional model and maps the three-dimensional model to field positioning; the construction progress control module dynamically simulates the process through four-dimensional coupling; the Internet of Things sensing module collects welding current, stress and temperature and humidity data in real time and carries out early warning. The visual inspection module inspects quality parameters such as seam splicing and lap joint based on unmanned aerial vehicle inspection; the evidence storage module encrypts and stores construction data; and the cloud platform integrates the whole-process instruction. Through cooperation of multiple modules, high-precision positioning, process dynamic simulation and data full-process management of floor support plate construction are realized, and the construction precision and the progress management and control efficiency are remarkably improved.

The invention discloses a concrete modular integrated building connecting system which comprises connection of a plurality of concrete modular box bodies, each concrete modular box body is composed of a prefabricated top plate, a prefabricated bottom plate, a prefabricated beam, a prefabricated shear wall and a prefabricated partition wall, and each concrete modular box body is formed through integral pouring; a reserved post-pouring area is arranged at the joint of every two adjacent box components, and notches are formed in the prefabricated top plates; connecting steel bars are in lap joint with the notches, and concrete post-pouring is conducted after the steel bars are in lap joint; u-shaped notches are formed in the prefabricated beams, upper and lower lap joint steel bars are laid at the U-shaped notches, and the two half sections of the prefabricated beams are connected into a whole after concrete is cast in place; a linear vertical notch is formed in the prefabricated shear wall between every two adjacent box bodies, the rib bodies of the wall bodies are connected in the linear notches, all the box bodies are stably connected through lap joint of the reinforcing steel bars and cast-in-place concrete of the cavities, and the prefabricated shear wall is suitable for high-rise buildings, can reduce the workload of a construction site and has good mechanical performance and anti-seismic performance.

The invention relates to a plate edge sealing treatment device for plane design, which comprises a back plate, a guide assembly, a belt supply assembly and a shearing assembly. The front surface of the back plate is attached to the back surface of a plate, the guide assembly is attached to the front surface of the plate, and an n-shaped lap joint piece is in lap joint with the upper end of the plate; the device is pushed to move from one end of a plate to the other end of the plate, in the moving process, a glue solution stored in a glue solution storage box drips on a glue coating wheel through a glue supply pipe, the glue coating wheel rotates under the action of friction force, the upper end of the plate is evenly coated with the glue solution, the front end of an edge sealing belt is bent backwards under the blocking action of a baffle and the side edge of the plate, and the edge sealing belt is fixed. The edge sealing belt is pressed below the pressing roller, the edge sealing belt is pasted on a plate for edge sealing under the extrusion effect of the pressing roller, after edge sealing is completed, the edge sealing belt is cut off through the shearing assembly, deflection or bubbles cannot occur between the edge sealing belt and the plate, the attractiveness of a finished product is good, and the small-batch edge sealing requirement of a plane designer during home decoration design is met.

The invention relates to the technical field of constructional engineering, in particular to a prefabricated large-span reinforced concrete floor capable of being assembled and adjusted. The floor slab comprises a prefabricated reinforced concrete slab with the length extending in the front-back direction, the front side and the rear side of the lower end face of the prefabricated reinforced concrete slab are each provided with a set of lap joint parts extending downwards, and a bottom support assembly fixed to the lower end face of the prefabricated reinforced concrete slab is arranged between the two lap joint parts; the bottom support assembly comprises a plurality of bottom support units which are arranged at intervals in the front-back direction, the bottom support units are symmetrically arranged in the front-back direction with the center of the prefabricated reinforced concrete slab as the center, the lower end of the bottom support unit in the middle is lower than the lower ends of the bottom support units on the two sides, and a prestress inhaul cable is connected between the two lap joint parts. And the lower end of each collet unit is supported and fixed on the prestressed inhaul cable. The bottom support assembly and the prestress inhaul cable are adopted to replace a lower flange and a web, the self weight is light, meanwhile, the lap joint part is arranged, the contact area of the floor and a building structure is increased, stress is reduced, assembling is convenient, and safety is improved.

The invention provides an intelligent tunnel excavation trolley and a construction method, and relates to the field of tunnel construction. According to the intelligent tunnel excavation trolley and the construction method, the intelligent tunnel excavation trolley comprises a platform structure, an arch frame and a fixing frame installed on the platform structure, the platform structure is used for stretching out, drawing back and moving, a fixed pulley is installed above the fixing frame, a winding wheel is rotatably installed at one end of the fixing frame, a rope is installed on the outer surface of the winding wheel, and the rope is in lap joint with the fixed pulley; according to the intelligent tunnel excavation trolley and the construction method, the arch frame is hoisted through the multiple clamps, time and labor are saved, the working efficiency is improved, through the arranged hydraulic traction mechanism, when any clamp deviates, hydraulic oil circularly flows in the multiple hydraulic chambers, the pipeline A and the pipeline B in sequence, and the working efficiency is improved. And the pressure applied to the hydraulic oil in the three hydraulic chambers reaches a balanced state, so that the forces applied to the sealing rods by the pistons are equal, and the lagging jack is more stable in the pulling process.

The utility model provides a male end connector structure which is used for being inserted and clamped in a corresponding female end connector, the male end connector structure comprises a tongue plate and a lap joint suite, the tongue plate is provided with a first plane and a second plane which are opposite, the lap joint suite comprises a fixed sleeve and a pair of plate spring sets, the fixed sleeve is fixedly sleeved on the tongue plate, and the plate spring sets are arranged on the first plane and the second plane. Each plate spring group is connected with the fixed sleeve and is respectively configured corresponding to the first plane and the second plane, each plate spring group comprises a plurality of elastic arms, each elastic arm is arched from the fixed sleeve to the direction far away from the tongue plate, and when the male end connector structure is inserted into the female end connector, the arched part of each elastic arm is clamped and fixed on the inner wall of the female end connector; therefore, the structure and the cost of the female end connector can be simplified, and the lap joint suite can effectively improve the efficiency and the stability of current transmission and prolong the service life of the current transmission.

The invention belongs to the technical field of battery manufacturing, and discloses a battery shell welding method and a battery shell. The battery shell comprises a cover plate and a shell, the cover plate comprises a body and a lap joint convex part, and the lap joint convex part is convexly arranged at the top of the peripheral side of the body; a containing cavity is formed in the shell and provided with an opening, the cover plate blocks the opening, the lap joint protruding part abuts against the top of the shell, and the outer edge of the lap joint protruding part is inwards staggered by a preset distance H relative to the outer edge of the side wall of the shell. And the lap joint convex part and the top of the body are fused and welded. For the cover plate provided with the lap joint convex part, after the outer edge of the lap joint convex part is inwards staggered by the preset distance H relative to the outer edge of the side wall of the shell, the lap joint convex part and the shell can be well welded by adopting a top welding method, so that the advantage of wide welding speed of top welding is reserved, and the advantage of side welding of preventing light from leaking into the battery is also achieved.

A cover plate assembly for a battery, a battery, and an electrical apparatus. The cover plate assembly comprises a cover plate (2) and a sealing cover (1), the cover plate (2) being provided with a through hole (25) and the sealing cover (1) being arranged on the cover plate (2) so as to block the through hole (25). The sealing cover (1) is provided with a first bent portion (11), a lap joint portion (12) and a second bent portion (13), the first bent portion (11) being connected to the cover plate (2), the lap joint portion (12) being located between the first bent portion (11) and the second bent portion (13), the first bent portion (11), the lap joint portion (12) and the second bent portion (13) being sequentially connected to form a recess, and the width L of the lap joint portion (12) being not less than 0.5 mm and not greater than 1.5 mm.

The invention provides a building waterproof roll construction method. The building waterproof roll construction method comprises the following steps that pre-paving waterproof construction is conducted on a base layer; performing waterproof construction on the basement side wall; and performing waterproof construction on the basement roof. The building waterproof roll construction method has the beneficial effects that roll waterproof construction can be conducted on a base layer, a basement side wall and a top plate, the construction process is reasonable, waterproof roll lap joints can be treated, the good waterproof effect can be achieved, waste of waterproof rolls is avoided, and in addition, the construction cost is reduced. The construction method strictly meets the requirements of construction specifications, rapid construction can be achieved, the construction efficiency is improved, the safety of constructors can be protected, and practicability is high.

The automatic production equipment for the U-shaped reinforcing mesh in the box girder comprises a straightening structure, a bending structure and a welding assembly, the straightening structure is arranged on the upstream portion of the bending structure, and the welding assembly is arranged on the downstream portion of the bending structure; the reinforcing steel bars sequentially pass through the straightening structures, the bending structures and the welding assemblies to form an inner U-shaped reinforcing steel bar net. Steel bars are automatically produced to form inner U-shaped steel bars, then the inner U-shaped steel bars are in lap joint with longitudinal steel bars conveyed in the limiting holes, a plurality of lap joint welding spots are welded and fixed through the first welding gun and the second welding gun, the inner U-shaped steel bar mesh with the stable structure is formed, automatic control is achieved in the whole process, and the production efficiency is high; meanwhile, manual intervention is avoided, and the formed inner U-shaped reinforcing mesh is good in consistency, high in strength and suitable for continuous large-scale production.

The invention discloses an I-shaped column-full dry type connection RC beam column joint and a connection method, and belongs to the technical field of building structure engineering. The joint comprises a prefabricated I-shaped column, a stepped beam, a shear connector and a U-shaped connecting steel plate. A long bracket and a short bracket are respectively arranged at the top and the bottom of the I-shaped column; the end part of the step-shaped beam is in an inverted step shape and is provided with an extending section; the shear connector is a long-strip-shaped steel member provided with a screw rod; and the U-shaped steel plate is provided with screw holes which are respectively matched with the shear connector and the beam end screw. During connection, rapid assembly is achieved in the mode that the brackets of the upper column and the lower column are in lap joint, shear key grooves are interlocked, the shear connectors penetrate into the square holes, the beam bodies are supported on the combined brackets, and finally the U-shaped steel plates are used for anchoring. According to the joint, complete dry type operation is achieved, cast-in-place concrete and steel bar welding are not needed, the construction efficiency is remarkably improved, wet operation is reduced, loads can be borne after installation, the overall performance is reliable, and the development requirement of fabricated buildings is met.

The container comprises a container body, top covers and a sealing structure, the container body comprises a top plate, a feeding port is formed in the top plate, the top covers are connected to the top plate in a pivoted mode, the top covers can be closed to the feeding port in an openable mode, the number of the top covers is at least two in the first direction, and the pivoting directions of all the top covers are the same. The top cover comprises a cover plate body and a frame structure arranged on the outer periphery of the cover plate body. The frame structure comprises two transverse parts arranged in the first direction and two longitudinal parts arranged in the second direction. Sealing lap joint between the top covers and the top plate is achieved through the transverse parts, sealing lap joint between the adjacent top covers is achieved through the longitudinal parts, a sealing waterproof area is formed, the sealing waterproof structure is simplified, water can be rapidly drained, rainwater is prevented from flowing into the box body along the joints of the adjacent top covers, goods are prevented from being affected with damp or damaged by water, and the service life of the box body is prolonged. And the sealing performance of the top cover is ensured.

The invention provides a multifunctional lifesaving assembly for rescue, and relates to the technical field of lifeboats, the multifunctional lifesaving assembly for rescue comprises a pontoon, a traction assembly is mounted on the surface of the pontoon, the traction assembly comprises a driving table, the driving table is fixed in the pontoon, two groups of winding seats are symmetrically arranged at the top of the driving table, and traction ropes are wound on winding shafts of the winding seats; a climbing assembly is arranged on the side edge of the pontoon, the climbing assembly comprises a climbing frame, the climbing frame is connected to the side edge of the pontoon in a lap joint mode, and two sets of right-angle sliding rails are symmetrically installed on the surface of the climbing frame in a sliding mode. The first floating ring can pull a person falling into water to the position near a ship in a traction mode, the first floating ring and the second floating ring are combined and then are in butt joint with the right-angle sliding rail, the two floating rings extrude and wrap the waist of the person falling into water and assist traction to climb the ship, physical power consumption of the person falling into water is saved, meanwhile boarding is more convenient, and the person on the ship is prevented from being pulled into water.

The invention discloses a marine gangway ladder preset time autonomous lap joint control system and a working method thereof. The system comprises an inertial measurement unit and a main control computer; the binocular camera is adopted, multi-sensor fusion is not needed, accurate lap joint point position information is directly obtained, and the method is simple and easy to implement; according to the provided preset-time autonomous lap joint control method, the system adjusting time can be set in advance, and operation and maintenance ship movement caused by waves is efficiently compensated by driving the swing mechanism, the pitching mechanism and the telescopic mechanism to cooperatively move, so that the front end of the offshore gangway ladder accurately follows the expected position of an upper lap joint point in time; the offshore accommodation ladder is lapped to the offshore wind turbine platform within the set lapping time, so that efficient and autonomous lapping of the offshore accommodation ladder and the offshore fixed or floating wind turbine platform is ensured, and the lapping efficiency is improved; the front end of the offshore gangway ladder is in non-contact lap joint with the lap joint point of the offshore wind turbine platform, no special requirement for the lap joint point exists, a landing device does not need to be built, and the maintenance and manufacturing cost of the gangway ladder is reduced.

The invention discloses a node structure of a prefabricated assembly type concrete beam column component. The node structure comprises a tenon, a lap joint, a wedge nail groove, a tenon tongue and a tongue hole. A tenon and a lapping opening are formed along the longitudinal symmetry center face of the prefabricated part in a dividing mode, the tenon and the lapping opening are matched in structure and size, one end of the tenon is embedded in the tenon, the other end of the tenon extends outwards from the end face of the tenon, the tongue hole is formed in the side end face of the lapping opening, the tenon is matched with the tongue hole, and the wedge nail groove is formed in the matching plane of the tenon and penetrates through the tenon in the transverse direction. The wedge nail grooves of the two prefabricated parts are oppositely buckled to form a wedge nail hole, a wedge nail penetrates through the wedge nail hole, the tongue hole is formed by a tongue hole embedded part, and the wedge nail groove is formed by a wedge nail groove embedded part; the joint structure adopts a wedge nail tenon structure, lap joint assembly is simple and easy to operate, assembly precision is easy to prefabricate and guarantee, assembly flexibility is higher, stability is good, site construction is friendly, and the joint structure is more suitable for connection between concrete prefabricated parts.

The invention discloses a large-current environment-friendly ring main unit which comprises an isolating switch and a circuit breaker structure, the isolating switch is located above the circuit breaker structure, the isolating switch and the circuit breaker structure are fixedly connected, the isolating switch comprises a moving knife assembly, the moving knife assembly comprises a moving knife and a moving knife holder, the moving knife is rotationally connected with the moving knife holder, the moving knife is provided with segmented contacts, and the moving knife is connected with the circuit breaker structure. The structure of the conductive copper piece is optimized, the effective lap joint number between lap joint faces and the heat dissipation area are increased, the heat dissipation efficiency is effectively improved, and the 1250A * 1.1 temperature rise test requirement is met in dry air.

The invention discloses a method for predicting the mechanical property of a dissimilar metal friction stir lap joint welded joint by fusing physical information, and belongs to the technical field of crossing of material processing and artificial intelligence. The method comprises the following steps that firstly, welding samples under different technological parameters are prepared through experiments, and the mechanical properties of the welding samples are tested; meanwhile, establishing a finite element simulation model, and extracting physical field data such as a temperature field and a stress-strain field; fusing the process parameters and the physical field data to serve as input features, taking the measured mechanical property data as output features, and forming a machine learning training data set; a prediction model is trained by adopting algorithms such as a gradient lifting decision tree and limit gradient lifting; and finally, new process parameters and physical field data obtained through finite element simulation are input, and the mechanical property of the joint can be efficiently and precisely predicted through the model. According to the method, the defects that a traditional trial and error method is high in cost and long in period are overcome, and key technical support is provided for optimization and intelligent design of the dissimilar metal friction stir lap welding process.

The invention relates to a laser cladding process optimization method for a ceramic phase reinforced composite coating, which comprises the following steps of: optimizing a melting power interval of ceramic phase composite powder by utilizing a single-factor experimental method, and determining a relationship among a powder feeding rate, a linear speed and power; deducing a corresponding proportional relation between the power and each process parameter and each coating parameter by adopting a recursion method; the ranges of the power, the linear speed and the powder feeding speed are set according to the corresponding relation range values of the power, the linear speed and the powder feeding speed, multi-channel lap joint is carried out, an orthogonal experiment is carried out, and the relation between technological parameters and coating parameters is determined; according to the method, a forward selection and reverse elimination combined mode is utilized, process parameters are determined according to the relation between the process parameters and the coating parameters aiming at the actually needed coating thickness, grouping experiments are carried out, and the optimal process parameters are selected. According to the method, comprehensive process exploration is carried out by utilizing a progressive regression analysis method, and proper process parameters can be conveniently obtained, so that an ideal ceramic phase reinforced composite coating can be obtained.

The utility model discloses bamboo processing equipment for recombined bamboo production. The bamboo processing equipment for recombined bamboo production comprises a rack, a feeding mechanism and a thinning mechanism, and the rack is provided with a lifting device; the feeding mechanism is arranged below the lifting device and used for conveying bamboo wood to be treated to move horizontally in the feeding direction. The thinning mechanism is connected to the lifting device so that the thinning mechanism can move in the height direction relative to the feeding mechanism, and the thinning mechanism comprises a thinning tool used for thinning the thickness of the end of the bamboo wood to be treated. According to the bamboo processing equipment for recombined bamboo production, the end portion of the bamboo to be processed is thinned through the thinning cutter, so that the bamboo bundle with the thinned end portion is formed, when the recombined bamboo is produced through bamboo bundle lengthening, the thickness of the lap joint of the bamboo bundle can be effectively reduced, and therefore it is guaranteed that the flatness of the recombined bamboo is consistent, and the appearance of the recombined bamboo is attractive.

The invention relates to the field of electric pole production, and particularly discloses a production process and system for a composite electric pole, and the production process comprises the following steps: A, positioning an inner layer part on an output shaft of a first movable transmission box, enabling the first movable transmission box to axially move along the inner layer part, and driving the inner layer part to rotate at the same time; b, axial wiring: arranging a base line layer on the surface of the inner layer part along the axis direction of the inner layer part by a wiring ring until the base line layer is arranged to a set thickness; c, circumferential wiring is carried out, then a center line layer is arranged in the circumferential direction of the inner layer piece through the same wiring ring, and the center line layer is arranged on the base line layer in a pressed mode till the center line layer is arranged to reach the set thickness; and D, the outer layer is wound on the outer side of the middle line layer, the outer layer is wound in a spiral track in a lap joint mode till the outer layer is wound to the set thickness, and the needed electric pole is formed. The composite material electric pole processed and manufactured through the method is high in strength and long in service life.

The utility model relates to a biliary tract woven stent, which comprises a woven stent formed by weaving one or a plurality of woven filaments, the woven filaments are wound along the axis in a positive and negative spiral line mode and interwoven with one another, and the mutually staggered woven filaments form a lap joint buckle structure capable of freely sliding or a hooking buckle structure limited in sliding at nodes. According to the technical scheme, the structure is reasonable, the stent can be degraded automatically while the radial supporting force of the stent is improved, and the stent taking-out operation is omitted.

An air inlet sealing shutter capable of minimizing ventilation resistance during opening belongs to the technical field of ventilation and air conditioning, and comprises a window frame and a vertical wide shutter group capable of minimizing ventilation resistance during opening, the vertical wide shutter group consists of M vertical wide shutters with rotating shafts, and M is greater than or equal to 2; the width W of the vertical wide shutter meets 0.5 m < = W < = 2.6 m, the ratio F of the thickness to the width of the vertical wide shutter meets 1 / 50 < = F < = 1 / 10, the vertical wide shutter with the ratio F of the thickness to the width is used for reducing ventilation resistance caused by the shielding area corresponding to the thickness of the vertical wide shutter when the shutter is opened, and meanwhile the wind resistance strength of the vertical wide shutter is maintained; the vertical wide shutter comprises an air inlet lap joint area, a solid shutter area and an air outlet lap joint area. When environmental wind exists and the shutter is opened, flow guide and vortex elimination are carried out through the vertical wide shutter blades with the width W and the air inlet lap joint area of the vertical wide shutter blades, so that the ventilation resistance of the shutter during inclined air inlet is minimized; when the louver is closed, air inlet sealing of the louver is achieved through alternate lap joint of the air inlet lap joint areas and the air outlet lap joint areas of the adjacent louvers.

The utility model discloses a heat exchange tube, a battery and an electric device. The heat exchange tube comprises a plurality of heat exchange sections, and the heat exchange sections are independently formed, spliced in sequence and communicated; each heat exchange section comprises a bent section and a straight section, the two straight sections of any two adjacent heat exchange sections are connected through a lap joint structure, the lap joint structure comprises a first inserting part and a second inserting part, and the first inserting part is inserted into the second inserting part and is connected with the second inserting part. According to the technical scheme, each heat exchange section is not interfered by other heat exchange sections in the forming process, the forming difficulty is reduced, and the production efficiency is improved; the distance between the multiple heat exchange sections does not need to be increased in order to avoid interference in the forming process, the heat exchange sections can be arranged more densely in a certain space range, the heat exchange area can be increased, the extending path of the heat exchange pipe from an inlet to an outlet can be more flexible and changeable, and the temperature adjusting requirements of different temperature field distribution can be met. And the multiple heat exchange sections are convenient to assemble, other communicating and matching components are not needed, and cost reduction is facilitated.

The present disclosure relates to methods for joining a first component to a second component with a laser welded lap joint. The laser seam of individual welds is substantially G-shaped. The weld seam comprises a substantially circular portion and a substantially straight portion at an end of the substantially circular portion, the substantially circular portion having a radius and corresponding to a circular arc around a circle centre with a central angle of 270º - 350º, and the substantially straight portion extending radially to the circle centre. The methods may be practiced on blanks prior to forming or on already formed components. The present disclosure further relates to weld assemblies obtained with such methods.