3231 results about "Board structure" patented technology

The invention relates to the technical field of printed circuit boards, and discloses a circuit board structure and a preparation method thereof, and the circuit board structure comprises a copper seat, the top of which is provided with a first groove; a chip, wherein the chip is arranged in the first groove; the ceramic substrate layer is arranged at the bottom of the copper seat, and the shape of the cross section of the ceramic substrate layer is the same as that of the bottom surface of the copper seat; the copper plate layer is arranged at the bottom of the ceramic substrate layer, and the shape of the cross section of the copper plate layer is the same as that of the cross section of the ceramic substrate layer. The ceramic substrate layer and the copper plate layer are sequentially arranged at the bottom of the copper base, the thermal resistance of the chip during working can be remarkably reduced, the overall heat dissipation performance can be improved, the cross sections of the ceramic substrate layer and the copper plate layer are consistent with the bottom surfaces of the copper base and the copper plate layer in shape, and the layers are high in structural fitting degree, uniform in stress distribution and good in plate thickness consistency after lamination; and the warping problem of the copper seat caused by thermal expansion is effectively reduced.

The utility model discloses a curtain wall unit plate structure which comprises tempered glass, an aluminum alloy top cross beam is arranged on the top of the tempered glass, an aluminum alloy bottom cross beam is arranged at the bottom of the tempered glass, an aluminum alloy male stand column is arranged on the left side of the tempered glass, and an aluminum alloy male stand column is arranged on the right side of the tempered glass. An aluminum alloy female stand column is arranged on the right side of the tempered glass, every two vertically adjacent curtain wall unit plates are connected through an aluminum alloy bottom cross beam and an aluminum alloy top cross beam, and every two horizontally adjacent curtain wall unit plates are connected through an aluminum alloy male stand column and an aluminum alloy female stand column; therefore, the connection difficulty of the adjacent curtain wall unit plates is reduced, the structure is reasonable, installation and construction are easy, the installation and construction efficiency of the curtain wall unit plates is improved, connection between the adjacent curtain wall unit plates is more stable, the sealing performance between the adjacent curtain wall unit plates is guaranteed, and the installation quality of the curtain wall unit plates is improved.

The invention provides a wave finite element and boundary element mixed composite board structure sound insulation performance prediction method, and the method belongs to the acoustics field, and comprises the steps: carrying out the post-processing of a wave finite element model based on the wave finite element model of a composite board structure and a corresponding equivalent nodal force, and obtaining the wave finite element equation of the whole composite board structure; based on a sound-structure coupling equation, through a boundary element method, a discrete boundary element equation related to the surface vibration speed of the composite board and the radiation sound wave pressure is constructed; coupling the wave finite element equation and the discrete boundary element equation of the whole composite board structure, and determining the sound pressure of radiation sound waves of the composite board structure and the surface vibration speed of the composite board; and based on the sound pressure of the radiation sound wave of the composite board structure and the surface vibration speed of the composite board, obtaining a sound insulation performance prediction result by calculating the sound power of the incident sound wave and the radiation sound wave, and completing prediction of the sound insulation performance of the composite board structure. The problems that the sound transmission loss of large plates and medium-high frequency plates is difficult to predict and the calculation cost is high are solved.

The utility model provides a railway non-buried subgrade pile-slab structure of underpass highway bridge, including: two rows of pile foundations, set up in the top of two rows of pile foundations, lay on the support beam on the bearing plate and set up in the ballastless track structure on the bearing plate, the two rows of pile foundations are correspondingly set up along railway subgrade and pass through highway bridge down, the ballastless track structure is set up in the ballastless track structure, the ballastless track structure is set up on the ballastless track structure, the ballastless track structure is set up on the ballastless track structure, the ballastless track structure is set up on the ballastless track structure. Wherein the pile foundations located below the highway bridge are arranged between the existing bridge piers; the two ends of each joist are arranged on the opposite pile foundations of the two rows of pile foundations; the bearing plate is used as the railroad bed and is arranged corresponding to the two rows of pile foundations; and each bearing plate is arranged corresponding to the ballastless track structure. By means of the roadbed structure, the problems that effective clearance of an existing roadbed structure is prone to being limited, the construction period is long, and additional settlement deformation is generated due to the fact that a fill roadbed generates additional loads on existing highway bridge piers can be solved.

The invention relates to the technical field of bridge construction engineering, and discloses a prefabricated bridge plate integral tensioning structure which comprises a bridge plate structure and a hydraulic driving device, the bridge plate structure comprises a bridge plate body, a plurality of through holes are formed in the bridge plate body, and the bridge plate body is provided with a plurality of corrugated pipes through the through holes; according to the bridge plate, through the arrangement of a double-liquid space control and limiting baffle structure of the hydraulic driving device, in the springback process after tensioning is completed, the displacement sensor monitors displacement of the steel strands in real time, and when it is detected that the springback distance is abnormal, the steel strands are driven by the hydraulic driving device to move back and forth. The position of the first anchor clamping piece is cooperatively adjusted through the third push rod and the second push rod, it is ensured that the first anchor clamping piece is tightly attached to an anchorage device hole, damage to the interior of a bridge plate due to too high prestress is avoided, potential safety hazards in subsequent use are reduced, and the structural stability is improved.

According to the printed circuit board and the preparation method thereof provided by the invention, the glass core plate is used for replacing a traditional resin material, and the characteristics of low thermal expansion coefficient, low humidity coefficient and low dielectric constant of the glass core plate are utilized, so that warping and signal interference caused by temperature change and environment humidity are effectively reduced, and the stability and reliability of the PCB are remarkably improved. Meanwhile, by repeatedly constructing a multilayer layer-adding structure, adopting an ABF layer at the position adjacent to the glass substrate and adopting dielectric layers with Dk < = 3.0 and Df < = 0.001 for the rest, signal attenuation and interference can be effectively reduced, signal integrity and transmission efficiency can be ensured, overall buckling deformation of the PCB structure can be reduced or even avoided, and the PCB structure is more stable in performance. The multi-layer adding meets the requirements of different application scenarios for the number of layers of the PCB, improves the flexibility and applicability of the PCB, and enables the PCB to be especially suitable for the application scenarios of high-frequency and high-speed signal transmission.

The utility model belongs to the technical field of test boxes, and particularly relates to a high-low temperature test box with uniform heating. Comprising test cavities which are arranged in a test box at intervals left and right; a placement net plate is embedded in the bottom of the test cavity; the fans are arranged below the placing net plate in a bilateral symmetry manner; the air inlet end of the fan is communicated with the test cavity through the placing screen plate, and the air outlet end of the fan is communicated with the air duct cavity; the air duct cavities are distributed on the left side wall and the right side wall of the test cavity in a bilateral symmetry manner; a spoiler is vertically and obliquely arranged in the air duct cavity, and an air distribution plate is arranged at the air return end of the air duct cavity. According to the utility model, through the arrangement of the spoiler and the air distribution plate in the air duct cavity, high and low temperature airflow with uniform airflow distribution can be provided for the interior of the test cavity, so that the temperature rise rates of different areas are consistent, and the uniform heating effect during product testing is further improved.

The invention provides a basement large plate structure steel plate overlapping reinforcing structure and a construction method, and relates to the field of structural engineering.The basement large plate structure steel plate overlapping reinforcing structure comprises a large plate structure plate reinforcing structure which is connected to the lower portion of an original concrete plate and located in a large plate structure plate reinforcing area. The large plate structure plate reinforcing structure comprises a prefabricated newly-added concrete structure which is prefabricated and poured on the upper portion of a reinforcing steel plate, and a notch is reserved in the upper end of the prefabricated newly-added concrete structure; the reinforcing steel plate is arranged on the lower portion of the prefabricated newly-added concrete structure, and interface connection between the reinforcing steel plate and the prefabricated newly-added concrete structure is further achieved through the shear connector. The connecting steel bars are arranged on the reinforcing steel plates; the mortar layer is arranged on the upper surface of the convex part of the prefabricated newly-added concrete structure; the cast-in-place newly-added concrete is arranged at the notch; and the tensile steel bars are partially embedded in the original concrete slab and are partially embedded in the cast-in-place newly-added concrete. The original large plate structure can be reinforced conveniently, quickly, economically and reasonably, the bearing capacity of the structure is improved, and the durability of the structure is enhanced.

The invention discloses a method for analyzing the strength stability of a composite material wallboard, which comprises the following steps of: 1) carrying out a wallboard strength test on a wallboard structure of a T-shaped stringer disconnected at a rib position to obtain test data required in the method for analyzing the strength of the wallboard; 2) performing finite element simulation on the BVID damage with the lowest residual strength in the wallboard in the same configuration and same loading mode in the wallboard strength test; 3) based on the finite element simulation in the step 2), establishing a multi-configuration wallboard finite element model; and 4) based on the multi-configuration wallboard finite element model in the step 3), fitting to obtain a correction coefficient, and determining a strength stability analysis method.According to the method, the defects of a classical wallboard strength engineering algorithm in stringer support condition simulation, layering applicability, BVID damage and initial geometric defect influence are overcome.

The utility model provides a prefabricated assembly type UHPC-profile steel combined bridge deck structure suitable for a trestle. The prefabricated assembly type UHPC-profile steel combined bridge deck structure comprises a reinforced concrete prefabricated slab, a first connecting part and a second connecting part. The number of the reinforced concrete prefabricated slabs is multiple, and the multiple reinforced concrete prefabricated slabs are flatly laid on a longitudinal beam of a trestle bailey beam. The first connecting part is arranged between the reinforced concrete precast slab and the longitudinal beam and is used for detachably connecting the reinforced concrete precast slab to the longitudinal beam; and the second connecting part is arranged between the two adjacent reinforced concrete prefabricated slabs and is used for mutually splicing the two adjacent reinforced concrete prefabricated slabs. The bridge deck structure is convenient and fast to construct, high in strength and toughness, good in driving comfort and good in durability.

According to the circuit board structure of the board edge embedded copper block provided by the utility model, at least one side surface of the copper block is exposed out of the board edge of the circuit board structure, and the embedded copper block is designed at the board edge of the circuit board for heat dissipation, so that the layout welding area of the circuit board is increased, and the heat dissipation efficiency is improved. The problem that no enough space is provided for arranging the embedded copper block in the board in the prior art is solved. By arranging the bump on the copper block, the adhesive force between the bump and the insulating dielectric layer in the circuit board is increased, and the problem that the binding force is weak when the copper block is embedded at the edge of the board in the prior art is solved.

The utility model belongs to the technical field of vehicle-mounted accessories, and provides a handrail with a table board structure and a vehicle, the handrail comprises a handrail body, a table board, a table board and a table board, the connecting rod assembly comprises a first end and a second end, and the first end is rotationally arranged in the containing cavity; the table board assembly comprises a main table board and an auxiliary table board, and the auxiliary table board is rotationally connected with the main table board and can be switched between a folding position and a maximum unfolding position on the main table board; and the transmission assembly is arranged between the main table plate and the second end. Compared with the prior art, the folding and unfolding type armrest has the advantages that the auxiliary table board of the table board assembly is driven by the transmission assembly to be folded and unfolded relative to the main table board, and on the premise that the effective supporting area of a table top of the table board assembly is not reduced, the required storage space is smaller when the table board assembly is located at the storage position, so that the space occupied by the whole armrest is smaller.

The invention discloses a prefabricated heat preservation groove type plate floor slab system of an assembly type steel structure trestle, and relates to the technical field of groove type prefabricated heat preservation floor slabs, the prefabricated heat preservation groove type plate floor slab system comprises an anti-skid face plate and a heat preservation bearing mechanism, the heat preservation bearing mechanism is arranged at the bottom of the anti-skid face plate, the heat preservation bearing mechanism comprises a plurality of sealing plates, and the sealing plates are arranged in the anti-skid face plate. The multiple sealing plates are arranged and located at the bottom of the anti-skid panel, multiple second supporting blocks are arranged at the bottoms of the sealing plates, groove-shaped plates are arranged on the outer sides of the multiple second supporting blocks, structural blocks are integrally formed through pouring and extruding, reinforcing strips are arranged on the inner walls of the structural blocks, and the structural blocks and annular hoops form a two-way constraint combined framework which can bear bending moment and shearing force; therefore, the bending resistance, the shearing resistance, the torsional rigidity and the overall bearing capacity of the plate body are improved on the premise that heat preservation is not affected on the whole, the engineering problems are avoided, and normal construction work and construction time are maintained.

The application provides a curtain wall embedded part for sandwich thermal insulation wall and a construction method thereof, and solves the problems of the existing sandwich thermal insulation wall curtain wall, which adopts a post-embedded part construction method, destroys the overall thermal insulation effect of the outer wall, and has low stress load strength. The application comprises a vertically arranged second embedded plate, a plurality of embedded bars extending to the right are fixedly arranged on the right side of the second embedded plate, the second embedded plate and the embedded bars are used for being embedded in an inner leaf wall, a steel reinforcement cage is arranged in the inner leaf wall, and the embedded bars are fixedly connected with the steel reinforcement cage; a sealing connecting plate structure extending to the left is fixedly arranged on the left side of the second embedded plate, an inner cavity with a left opening is arranged in the sealing connecting plate structure, a first flexible thermal insulation filling block with elasticity is filled in the inner cavity, a vertically arranged adapter substrate is fixedly arranged on the left end of the sealing connecting plate structure, a waist hole extending in the front-rear direction and penetrating through left and right is arranged on the adapter substrate, and the waist hole is in communication with the left and right of the inner cavity.

The invention relates to the technical field of table plate structures, in particular to a table plate structure with an unlocking structure and an automobile seat, which comprises a back plate, a storage groove is formed in one side of the back plate, a connecting seat is mounted at one end of the inner side of the storage groove, a connecting frame is mounted in the connecting seat in an embedded manner, and damping rotating shafts are rotatably connected to two ends of the bottom of the connecting frame; the other end of the outer wall of the damping rotating shaft is fixedly sleeved with a fixing frame, the fixing frame is connected with the connecting frame in a clamped mode through a locking mechanism, a containing cover is installed on the fixing frame through a connecting assembly, and the locking mechanism comprises a pushing assembly and a positioning assembly. According to the invention, the structure is simple, the operation is convenient, the position of the table plate component can be quickly locked and unlocked during actual use, the use of personnel is facilitated, the locked position can be further reinforced and positioned, the stability during actual use is further improved, and the table cannot be easily unfolded by mistaken touch.

The present invention relates to the technical field of bridge engineering. Particularly disclosed are a steel shell-concrete composite orthotropic bridge deck structure and a fabrication method and device. The steel housing-concrete composite orthotropic bridge deck structure comprises a steel shell structure, infilled concrete, longitudinal and transverse stiffening ribs arranged at the bottom of the steel shell structure, and a deck-end connecting structure, wherein the steel shell structure comprises an upper steel plate and a lower steel plate that are arranged in parallel, and a plurality of perforated T-shaped ribs arranged in parallel in a longitudinal direction. Webs of the perforated T-shaped ribs are welded to the upper steel plate, flanges are riveted to the lower steel plate, the upper steel plate and the lower steel plate are connected into the steel shell structure, and reinforced concrete tenons formed by the perforated T-shaped ribs and core bar reinforcements and shear bolts anchor the upper steel plate and the lower steel plate in the infilled concrete to form a steel shell-concrete composite deck that bears loads jointly. The present invention provides high bending stiffness, solves the problem of fatigue at welds between the stiffening ribs and a steel top plate, fully utilizes the properties of a steel shell and concrete, and solves the problems of the crackability under a negative bending moment and excessive weight of a traditional composite bridge deck.

The invention discloses a PCB intelligent jointed board based on parameterized driving and a process compensation method and system, and the method comprises the following steps: S1, determining a jointed board structure, inputting jointed board parameters through a graphical interface, and finally calculating the size of the jointed board in real time; s2, process edge compensation is carried out based on the input jointed board parameters, and coordinate positioning of a tool hole and an optical point is calculated; s3, analyzing the original PCB outline data, and calculating a milling vacancy processing position; and S4, comparing the pre-manufactured milling belt with the theoretical shape to calculate a specific position which is not milled in place, and taking the specific position as a corner cleaning hole adding position. According to the method, a visual graphical parameter input interface can be provided, real-time preview is supported, and intellectualization and parameterization of process edge compensation and gong vacancy generation are realized.

An apparatus for supporting a posted structure is provided which is fixable to a planked structure. The apparatus includes a base plate having: top and bottom faces; first and second intersecting axes which separate the top face of the base plate into first, second, third, and fourth quadrants; and first, second, third, and fourth apertures formed in the four quadrants, respectively. The apparatus further includes an upstanding cylinder extending from the top face of the base plate at the intersection of the first and second axes; and, first, second, third, and fourth locking bolts each having: an elongated shank; and, an elongated locking member fixed transversely to the shank, the locking member being sized to pass through spacing between a pair of adjacent planks of the planked structure. Locking nuts are provided for threadedly mounting to threads of each the first, second, third, and fourth locking bolts.

The invention discloses a horizontal machining center deep hole machining tool which comprises a horizontal machining base and a moving plate, a first stabilizing plate is fixedly connected to the upper portion of the moving plate, and an attaching mechanism is arranged on the upper portion of the first stabilizing plate and comprises a first semicircular plate arranged on the upper portion of the first stabilizing plate. And the clamping stability and adaptability of workpieces in various shapes are remarkably improved. The tool adopts a plurality of groups of semicircular plate structures which can be nested in a sliding manner, the first to fourth semicircular plates are linked in sequence through the sliding grooves, and when the tool is used for workpieces with complex shapes such as special-shaped parts and irregular curved surface parts, each group of semicircular plates can adaptively adjust the fitting angle and position according to the contour of the workpiece, so that a multi-point uniform holding clamping effect is formed; according to the tool, the deep hole drill rod and the chipping absorbing plate are controlled in a linkage mode, when the drill rod makes contact with the surface of a workpiece, the chipping absorbing device is triggered to be started through gear meshing, the chipping absorbing function continuously runs in the drill rod feeding process, and fine chippings generated during deep hole machining can be accurately captured.

An energy store floor structure for an electrically drivable motor vehicle, includes: a floor structure which has associated longitudinal and transverse members; and an electrical energy store device which has a store housing disposed on the underside of the floor structure. The store housing is connected to the associated longitudinal or transverse member of the floor structure at least in a length region along a fastening plane by way of mechanical connectors and is sealed against the corresponding longitudinal or transverse member of the floor structure at least in the length region along a sealing plane by way of a seal. In order to create an energy store floor structure in which the store housing is protected against excessive deformation and cell intrusions, the fastening plane and the sealing plane are mutually spaced apart in the corresponding length region.

The invention provides an unmanned aerial vehicle composite wingtip structure with an antenna mounting function and an assembly method thereof. The unmanned aerial vehicle composite wingtip structure comprises a left interlayer skin 1 and a right interlayer skin 2, wherein each of the left interlayer skin 1 and the right interlayer skin 2 comprises an outer skin 18, a foam core 19 and an inner skin 20; the foam core 19 is positioned at the rear part of the wingtip; the outer skin 18 and the inner skin 20 are completely and symmetrically laid to form a pure laminate structure; the front beam supporting piece 3 and the rear beam supporting piece 4 are of a pure laminate box-shaped structure formed by completely and symmetrically laying fabric prepreg and are of a wingtip bearing structure. The lower portion of the front beam supporting piece 3 and the lower portion of the rear beam supporting piece 4 are each provided with a sunken area, and the sunken areas are installed on the front beam tail section 13 and the rear beam tail section 15 in an embedded mode. The antenna supporting piece 5 is of a pure laminate box-shaped structure formed by completely and symmetrically laying fabric prepreg, and is embedded in the front beam supporting piece 3 and the rear beam supporting piece 4; the antenna switching support 6 is a plate-shaped structural member and is in threaded connection with the antenna supporting member 5; and the skin folding strip 7 is laid outside the left interlayer skin 1 and the right interlayer skin 2.

The invention discloses a high-altitude jig-frame-free construction method for a daylighting roof of a string folded plate structure, which comprises the following steps of: transversely erecting a box-shaped support beam between building main body structural beams below the middle part of the span of the daylighting roof, and arranging a plurality of cushion blocks on the box-shaped support beam corresponding to a main beam of a daylighting roof steel structure, therefore, an aerial supporting platform used for supporting the middle area of the main beam is formed. The box type supporting beams are transversely erected below the middle of the span of the daylighting roof and between the building main body structural beams, the cushion blocks are arranged to form an aerial supporting platform, a traditional floor jig frame erected from the ground is replaced, and the problem that a floor support cannot be erected under the condition that the space below the daylighting roof is suspended or the daylighting roof is put into use is solved; meanwhile, interference to other procedures in the lower space is avoided; high-altitude in-situ scattered splicing is carried out by taking a main beam supported by an aerial supporting platform as a support, so that a string-folded plate system has enough temporary rigidity and a stable initial configuration before a stay cable is tensioned.

A fastener setting tool for installing a fastener into a board structure, comprising a tool body having a bottom surface and a longitudinal axis; a spacer assembly, comprising a first abutment member, having a first engagement surface, and a second abutment member, having a second engagement surface opposingly spaced apart from said first engagement surface, each one of said first and second abutment member extending away from and in a direction normal to said bottom surface of said tool body, said spacer assembly being configured to cooperatingly positioningly engage the board structure; at least one fastener guide operably coupled to any one of said first and second abutment member, and configured to guidingly receive a fastener for the board structure; and a spacer adjustment mechanism, adapted to selectively lockingly move at least one of said first and second abutment member in a direction along said longitudinal axis.

The invention provides a built-in elastic connector for a cable accessory, and relates to the technical field of cable accessories. The fixing plate is of an annular plate structure. A first plug of a cylindrical structure is arranged on the inner side of the fixing plate in a sliding mode. A lower protection plate of a circular structure is fixedly arranged at the bottom of the outer side of one end of the first plug. An annular groove structure is formed in the inner side of the lower protection plate; the two sides of the bottom of the lower protection plate are each fixedly provided with a gas tank, and the gas tanks are filled with nitrogen dioxide gas. A second sliding rod of a rectangular rod structure is slidably arranged in a rectangular through groove in the inner side of the bottom of the lower protection plate. The top end of the second sliding rod is fixedly provided with a detection block of a wedge-shaped block structure, connection abnormity can be rapidly judged only through visual inspection, the timeliness and convenience of fault detection are greatly improved, the operation and maintenance cost and difficulty are reduced, the problem that connection looseness cannot be conveniently found in real time is solved, and the fault detection efficiency is improved. And the elastic force of the spring cannot be well monitored.

This invention provides a method for constructing a sidewall without tie rods using interlocking pile support in open-cut tunnels. The method includes: setting foundation pre-embedded bolts; pouring foundation concrete; binding sidewall reinforcement; installing sidewall steel panels and supporting trusses; installing and debugging the sidewall formwork support system; installing and testing the anti-buoyancy system; installing and debugging a multi-target distance sensing steel formwork deformation monitoring system; pouring sidewall concrete; and treating construction joint waterproofing. This invention solves the problem of limited construction space for formwork trolleys in local tunnel construction sections by optimizing the formwork structure system. Compared to traditional large-volume steel formwork installation, it offers lower material costs, more flexible installation and adjustment, and superior anti-buoyancy stability, significantly improving the overall construction progress. Simultaneously, the operational efficiency of the construction joint waterproofing and formwork deformation monitoring system is also significantly improved. This construction technology demonstrates multiple technical advantages in practical applications, including high quality, high efficiency, and high returns, with outstanding application results.

A sports board incorporating reclaimed / reused sports board materials, and a method of making a such a sports board, allows for incorporation of portions of used (recycled) composite sports boards (or waste from the manufacture thereof) into new sports boards. This lessens the accumulation of composite sports board waste in the global environment, reduces the quantity of new virgin materials needed in the manufacture of new composite sports boards, and lessens the environmental impact of composite sports board manufacture and use. Optionally, the reclaimed sports board material may be incorporated into a new sports board in a manner providing structural enhancements (e.g., increased regional stiffness) to new sports boards. This may allow for structural enhancement while avoiding a significant increase in sports board weight, by incorporating used composite materials into new composite sports boards.

The application discloses a kind of frame structures for the beam-column reticular layout of large-span building, belong to building structure design technical field;Including corner column, adjacent corner column, one corner beam, two corner beams, corner beam, edge perimeter beam, two perimeter beams and inner perimeter beam;Outer edge rectangular frame structure, right triangle frame structure, one corner beam, middle rectangular frame structure, two corner beams and inner edge frame structure are jointly constituted beam-column reticular frame structure;Perpendicular to one corner beam is equipped with corner beam for supporting lap one corner beam, the intersection of corner beam and edge perimeter beam is equipped with adjacent corner column, one corner column, two adjacent corner columns, corner beam and edge perimeter beam jointly constitute right triangle frame structure;It is connected with one two corner beams along the linear direction of one corner beam and extends inward, and two corner beams are connected by inner perimeter beam to form inner edge frame structure.The frame structure of the application can continuously arrange and connect steel beam in limited height, form large-span beam-slab structure, reduce beam height while reducing the negative bending moment of beam at beam-column joint.

The utility model relates to the technical field of scaffold boards, and discloses a building scaffold board structure with high bending resistance, which comprises a frame body, grooves are respectively arranged on the inner walls of the front side and the rear side of the frame body, a plurality of reinforcing strips are fixedly arranged between the two grooves at equal intervals, and a bearing plate is placed on the plurality of reinforcing strips. Positioning insertion holes are formed in the wall faces of the front end and the rear end of the bearing plate correspondingly, mounting bins corresponding to the two positioning insertion holes are formed in the front end and the rear end of the frame body correspondingly, and movable sliding plates are slidably connected into the two mounting bins correspondingly. The pull block is pulled, the pull block drives the sliding rod to move, the sliding rod drives the movable sliding plate and the insertion plate to move together, the insertion plate is moved into the installation bin, at the moment, the reset spring is compressed, then the bearing plate is placed on the multiple reinforcing strips in the frame body, then the pull block is loosened, and under the rebound effect of the reset spring, the bearing plate is fixed. And the sliding plate and the insertion plate are moved to return to original positions, and at the moment, the insertion plate is successfully inserted into the positioning insertion hole to limit and fix the bearing plate.

The utility model discloses a panel structure, a tray panel splicing assembly and a splicing frame, and belongs to the technical field of trays. The panel structure comprises a middle supporting part, edge supporting parts arranged on the left side and the right side of the middle supporting part and a bearing platform part connected with the middle supporting part and the edge supporting parts, and the middle supporting part, the bearing platform part and the edge supporting parts are integrally formed and prepared by bending a steel plate. The tray panel splicing assembly comprises the panel structure, a barrier strip and a protective plate, and the tray panel splicing assembly is formed by resistance welding of the panel structure, the barrier strip and the protective plate. The tray splicing frame comprises the tray panel splicing assembly and further comprises bottom leg assemblies, and a plurality of sets of bottom leg assemblies are arranged on the lower side of the tray panel splicing assembly. The utility model has the advantages of high strength, high bearing capacity, long service life, low maintenance, flexibility, multiple purposes, environmental protection, sustainability and the like, is light, durable and reusable, and has very high practical value.