31results about How to "Reduce section size" patented technology

The utility model relates to a double-layer reticulated shell steel structure hyperbolic cooling tower, which is characterized in that a tower body is a hyperbolic paraboloid formed by rotating around a central shaft by taking an inclined straight line as a bus, the tower body comprises double-layer inclined struts, double-layer ring beams and reinforcing ring trusses, and the tower body forms an X-shaped unit of a corresponding layer through cross connection between the double-layer inclined struts from bottom to top; the axes of the double-layer inclined supporting columns coincide with the generatrix of the tower body, each X-shaped unit is provided with a double-layer ring beam, the double-layer inclined supporting columns and the double-layer ring beams are connected through separated connecting joints and are lattice type steel pipe components, and reinforcing ring trusses are arranged at the positions, at different heights, of the tower body respectively. The reinforcing ring trusses are fixedly connected with the double-layer ring beam on the layer; a widening platform is arranged between two adjacent X-shaped units at the bottommost part of the tower body, the widening platform is a three-chord reinforced truss, the widening platform is respectively and fixedly connected with the X-shaped unit at the bottommost part and the X-shaped unit at the upper layer, and an enclosure structure is arranged on a triangular grid formed by the double-layer inclined support columns and the double-layer ring beams.

The application discloses a heat dissipation structure of an outdoor device and a centralized inverter integrated machine. The copper bar connected between an inverter and a transformer is connected with an internal cavity of an alternating current side of the inverter, heat generated by the copper bar is discharged to the inverter, and the heat exchanger in the inverter is used to discharge waste heat to the external environment. The heat dissipation problem of the copper bar connected between the inverter and the transformer and the connecting cavity is solved, and the cross-sectional size of the copper bar is reduced. The temperature of the copper bar connected between the inverter and the transformer and the connecting cavity is reduced, and the service life of internal devices is prolonged.

The utility model belongs to the technical field of cooling unit, concretely relates to a double -sided air -intaking circulating cooling unit for nuclear power station, including unit base and unit box, the unit box is barrel -shaped structure, and the opening side of unit box is connected with unit base buckle, and unit base is provided with the through -hole and forms the air outlet, the opposite sides wall of unit box is provided with the air inlet symmetrically, and the air inlet is covered with air -intaking treatment subassembly, the utility model discloses the design of unit box double -sided air -intaking makes filter, cooler two -sided air -intaking, can reduce the cross -sectional dimension of circulating cooling unit under the condition that total air -intaking area is invariable, thereby making circulating cooling unit can be arranged in the annular corridor of inside safety shell.

This utility model belongs to the field of photovoltaic (PV) brackets, and discloses a column structure and a PV bracket. The column structure includes a column body and a reinforcing member. The reinforcing member is disposed on at least one side of the column body and extends along the height direction of the column body. At least a portion of the cross-section perpendicular to the height direction of the column body is a closed cross-section. This utility model, by providing a closed-section reinforcing member on at least one side of the column body, improves the overall bending, torsional, shear, and tensile strength compared to open-section or flat components. It also increases the contact area with the soil, further enhancing its tensile and bending strength. Furthermore, by improving the overall performance of the column body through the reinforcing member, there is no need to increase the cross-section of the column body, saving materials.

This invention discloses an X-band synthetic aperture radar waveguide bandpass filter and radar, relating to the field of waveguide bandpass filter technology. In the waveguide bandpass filter of this invention, along the signal transmission direction, a standard rectangular waveguide WR-90 input structure, multiple resonant cavities, and a standard rectangular waveguide WR-90 output structure are connected sequentially. The standard rectangular waveguide WR-90 input structure is connected to the first resonant cavity through a coupling window, adjacent resonant cavities are connected through a coupling window, and the last resonant cavity is connected to the standard rectangular waveguide WR-90 output structure through a coupling window. Each resonant cavity is provided with a stub, and all stubs generate a transmission zero at the same frequency outside the passband. This invention takes into account the comprehensive performance requirements of miniaturized structure, wide operating bandwidth, and steep passband edge.

The utility model discloses a special plastic door and window profile combined with an old door and window frame material, and relates to the technical field of door and window profiles, an outer frame profile comprises a fixing part and a clamping block, a plurality of fixing sheets are arranged on the outer side of the fixing part, and the clamping block is arranged on the inner side of the fixing part; the crosspiece profile comprises a supporting part, an upper clamping block and a lower clamping block, and the upper clamping block and the lower clamping block are symmetrically arranged relative to the supporting part; the cover plate comprises a plate body and buckling pieces, and the buckling pieces are arranged at the two ends of the plate body. One end of the window sash frame profile is provided with a glass fixing groove, and the other end is provided with a clamping groove; and the sealing edge is buckled outside the window sash frame profile. The combined frame material is attached to an old door and window frame material, so that the situation that a common plastic-steel door and window needs to have the capability of independently bearing loads is avoided, and the combined frame material mainly bears vertical and horizontal loads by means of the original door and window frame material; therefore, on the premise that the structural requirement is met, the section size is reduced as much as possible, materials are saved, meanwhile, the window sill is smaller and more exquisite, and occupied space of an original window sill is reduced.

The utility model relates to the technical field of inflatable cushions, in particular to an explosion-proof inflatable cushion with a multi-air-cavity structure, which is characterized in that air enters a horizontal air passage, a part of air moves forward along the horizontal air passage and enters other air cavities, a part of air enters a middle air cavity from an upper air outlet, and a part of air enters a protective cushion from a lower air outlet; the cushion body surface layer and the protection cushion surface layer are the same in structure and are sequentially made of PVC, carbon fibers and polyester fibers from inside to outside, the PVC is high in flexibility, rich in elasticity, compact in texture and free of air leakage and is a base layer material of the cushion body and the protection cushion, the carbon fibers are high in strength, small in density and thin in thickness, meanwhile, the PVC base layer is bound, explosion caused by huge deformation due to excessive pressure is avoided, the service life of the inflatable cushion is prolonged, and the service life of the inflatable cushion is prolonged. When the protection pad is damaged and cannot be repaired, the lower air outlet is pulled out from the pipeline inlet of the protection pad while the magic tapes of the pad body and the protection pad are torn off, and then the lower air outlet is plugged into the pipeline inlet of a new protection pad, so that the pad body and the protection pad do not need to be replaced at the same time, and the cost is reduced.

The invention provides a cross-section channel opening type folded waveguide slow-wave structure. The folded waveguide slow-wave structure comprises two first structure parts which are arranged along the broadside direction of the slow-wave structure; the second structure part and the electron beam channel are arranged between the two first structure parts; the first structure part comprises a first straight waveguide section and a first waveguide connection section; the second structure part comprises a second straight waveguide section and a second waveguide connection section; the first waveguide connecting section comprises a second outer arc boundary, a second outer arc connecting part is arranged between the second outer arc boundary and the first straight waveguide section, and a second interval height is formed between the second outer arc connecting part and the axis of the electron beam channel in the radial direction of the electron beam channel; the second waveguide connecting section comprises a third outer arc boundary, a third outer arc connecting part is arranged between the third outer arc boundary and the second straight waveguide section, a third interval height is formed between the third outer arc connecting part and the axis of the electron beam channel in the radial direction of the electron beam channel, and the third interval height is larger than the second interval height.

The utility model discloses a multi-way valve for a heat management system of a new energy automobile, and relates to the technical field of multi-way valves. Comprising a valve body, the two ends of the valve body are closed, a valve cavity is formed in the valve body, a plurality of valve ports are formed in one side wall of the valve body side by side in the axial direction of the valve body, and the valve ports communicate with the valve cavity; the valve element is provided with a plurality of flow channels, and the valve element can rotate around the axis of the valve element; the sealing gasket is located between the inner wall of the side, provided with the valve ports, of the valve body and the outer side wall of the valve element, the sealing gasket can seal a gap between the valve element and the valve body, the sealing gasket is provided with a plurality of flow guide ports, and the flow guide ports correspond to the valve ports one to one; and after the valve element rotates by a preset angle, the flow channels in the valve element can communicate with the corresponding valve ports according to the corresponding flow path communication modes. The utility model meets the use requirements of the new energy automobile thermal management system.

This utility model discloses a two-stage molding ultra-long frame structure without post-pouring strips, comprising an ultra-long frame structure cast in one piece without post-pouring strips and a buckling-restrained brace structure installed later. The ultra-long frame structure includes concrete frame columns and a concrete floor slab. The key feature is that the concrete frame columns and the concrete floor slab are formed in one stage, with the concrete floor slab positioned above the concrete frame columns. A buckling-restrained brace structure installed in the second stage is provided between the concrete frame columns. The buckling-restrained brace structure includes a core material, an outer sleeve, and an isolation layer. This utility model solves the crack resistance problem of ultra-long frames using the simplest, most economical, and most effective method, while avoiding the problems of long construction periods, poor building performance, and poor economic efficiency associated with post-pouring strips.

A window-type grid-supported multi-lateral force-resistant support frame includes columns, beams, and grid support components; two columns are arranged in parallel, and a plurality of beams are arranged vertically between the two columns at equal intervals, so that the space between the two columns is divided into a plurality of rectangular frames; a support component is fixedly arranged in each rectangular frame. The grid support system of the present invention forms a lattice beam by optimizing the grid form, indirectly reduces the frame height, effectively reduces the calculated length of the support rod, has a small slenderness ratio of the support rod, has good anti-buckling ability, is not prone to buckling failure of the support rod, and is easy to control support buckling failure.

The utility model discloses a string beam photovoltaic support structure suitable for offshore large-span integrated installation, including pile foundation, string beam structure and purline, string beam structure includes support crossbeam, upper chord beam, lower chord cable, support rod, connecting ball, support crossbeam is arranged in parallel, and pile foundation is located below support crossbeam and is fixed with support crossbeam, a plurality of upper chord beams are arched and straddle on support crossbeam, and lower chord cable is axially tensioned along upper chord beam, and a plurality of vertical support rods are arranged between upper chord beam and lower chord cable, and the upper portion of support rod is fixed with the lower portion of upper chord beam, and the lower portion is connected with lower chord cable through connecting ball, and purline is arranged above upper chord beam and is perpendicular to upper chord beam. The utility model has low production cost, compared with traditional offshore photovoltaic support structure, utilizes cable structure to replace steel truss structure, gives full play to the load bearing characteristics of material, reduces the cross section size of component, reduces the steel consumption, adopts large-span string beam photovoltaic support structure simultaneously, and reduces the pile foundation usage amount.

The invention relates to the field of arm supports, and discloses an arm joint, an arm support and engineering machinery, the arm joint comprises a plate-shaped upper-layer frame, a plate-shaped lower-layer frame and a plurality of web member structures, the arm joint is arranged to be switched between a use state and a transportation state, in the use state, the upper-layer frame and the lower-layer frame are spaced in the height direction, and in the transportation state, the upper-layer frame and the lower-layer frame are separated in the height direction. The two ends of the web member structure are connected to the upper-layer frame and the lower-layer frame correspondingly, in the transportation state, the two ends of the web member structure are separated from the upper-layer frame and the lower-layer frame correspondingly, and the upper-layer frame and the lower-layer frame are stacked in the height direction. And the sizes of the upper-layer frame and the lower-layer frame in the height direction are smaller than those of the upper-layer frame and the lower-layer frame in the use state in the height direction. According to the technical scheme, the web member structure is detachably connected with the upper-layer frame and the lower-layer frame, so that the web member structure is allowed to be detached in the transportation process, the section size of the cantilever crane is reduced, and the transportation difficulty and the transportation cost are reduced.

The invention relates to a mixed section middle tower which comprises a steel tower column. The top end of the steel-concrete combined tower column is fixed with the bottom end of the steel tower column, and an upper joint surface is formed at the fixed part; and the top end of the concrete tower column is fixed with the bottom end of the steel-concrete combined tower column, and a lower joint surface is formed at the fixed part of the concrete tower column and the bottom end of the steel-concrete combined tower column. The upper portion of the tower column is of a steel structure, the middle of the tower column is of a steel-concrete combined structure, and the lower portion of the tower column is of a reinforced concrete structure. The tower column has the advantages that a force transmission anchoring structure is located in a main tower, durability is good, tower column outer contour transition is even and smooth, appearance is attractive, tower column size and rigidity balance is good, a combination section is relatively simple in structure, and construction is convenient and fast.

The present invention relates to the technical field of laminated filters, and in particular to a filter laminate and a filter. The filter laminate provided by the present invention comprises: a laminate body, a plurality of flow guides and a flow channel structure. The flow guides are distributed in an array on the laminate body along a first direction and a second direction, and are arranged along the surface protrusions of the laminate body, and two adjacent flow guides are arranged at intervals; the shortest distance between two adjacent flow guides in the second direction is a first spacing, and the shortest distance between two adjacent flow guides in the second direction of the next group in the first direction is a second spacing, and the first spacing is greater than the second spacing; the flow channel structure comprises a plurality of first flow channels and a plurality of second flow channels arranged in an alternating manner, the first flow channel is extended along the first direction and arranged between two adjacent flow guides in the second direction, and the second flow channel is extended along the second direction and arranged between two adjacent flow guides along the first direction, thereby improving the filtering efficiency of the filter laminate.

A novel fiber concrete polyurethane fabricated thermal insulation wallboard relates to a building wall material and comprises an outer layer A, an inner core and an outer layer B. The inner core is located between the outer layer A and the outer layer B. The outer layer A is provided with an embedded convex block, and the outer layer B is internally provided with an embedded groove. The thermal insulation performance is achieved, polyurethane is adopted as a core thermal insulation material, and the thermal conductivity is low. The heat conductivity coefficient of the aerogel heat insulation felt is extremely low, and the normal-temperature heat conductivity coefficient is about 0.017 W / (Km) and is 3-5 times that of a traditional material; the heat conductivity coefficient of the novel polyurethane insulation board is also very low, and when the density of the hard polyurethane is 35-40 kg / m, the heat conductivity coefficient is only 0.018-0.024 w / (m.k).

The present application relates to a tall curved facade curtain wall support system, which belongs to the field of cable net curtain wall technology, and solves the problems of poor overall permeability and high cost of the cable net curtain wall in the prior art. The tall curved facade curtain wall support system includes a bow-shaped structure, hoop beams and slings. The bow-shaped structure is arranged vertically at intervals. The bow-shaped structure has vertically arranged string columns, struts and steel cables connected to both ends of the string columns and connected in series to form an arc-shaped arrangement. Multiple string columns are located on the same arc surface; the hoop beam is an arc structure, which is vertically connected to the string column, and the hoop beam is arranged horizontally in accordance with the curved facade of the curtain wall; the sling connects multiple hoop beams in the longitudinal direction, and is configured to hang the hoop beams to reduce the vertical span of the hoop beams. The present application improves the overall permeability of the cable net curtain wall and reduces the construction cost.

This invention discloses an active energy-dissipating debris flow grid dam and its construction method. The grid dam includes columns, beams, and U-shaped connectors. The columns and beams are connected by the U-shaped connectors to form a reliable and stable protection system. The U-shaped connectors consist of a U-shaped connecting pipe, two sealing plates, two push plates, two push rods, air, absorbent material, two baffles, and an air valve. The U-shaped connecting pipes connect the upper and lower beams. The beams transmit force to the other push rod and beam through compressed air via a push rod, achieving the purpose of dissipating debris flow. In this invention, the structural system itself does not consume energy, the cross-sectional dimensions of the structural components are greatly reduced, saving costs. The U-shaped connectors clearly transmit force, achieving active energy dissipation of debris flow, increasing the overall impact resistance of the structure, and ensuring structural safety and reliability.

The present invention relates to a prestressed cantilever retaining wall and a construction method thereof. A plurality of steel casings extending from a concrete vertical plate to a concrete bottom plate are arranged inside the cantilever retaining wall, and a plurality of high-tension steel cables are introduced into the steel casings. The two ends of the high-tension steel cables in a stretched state are respectively locked and fixed to the cantilever retaining wall by a locking component, so that the cantilever retaining wall is in a prestressed state before filling, which can effectively offset part of the tension in the concrete cantilever retaining wall due to the bending of the vertical plate after the retaining wall is filled, thereby improving the overall bending resistance and anti-overturning performance of the retaining wall. The construction method of the prestressed cantilever retaining wall of the present invention can be applied to any area, especially in soft soil areas, to build a cantilever retaining wall with a height greater than 6m, and can reduce the flexural deformation, increased bending, and potential fracture and breakage risks of the concrete vertical plate as the height of the retaining wall increases.

The application discloses a large-span light-weight self-balancing glass curtain wall and relates to the technical field of building curtain walls.The large-span light-weight self-balancing glass curtain wall comprises a curtain wall body, the curtain wall body comprises a steel truss and glass panels fixedly installed on the steel truss, exquisite steel support rods, a plurality of groups of the exquisite steel support rods are distributed in a vertical direction, each group of the exquisite steel support rods comprises two exquisite steel support rods symmetrically fixed on left and right sides of the steel truss, a circular hole is formed in an end of each exquisite steel support rod away from the steel truss, and an adjusting pull rod is arranged in the circular hole, and a plurality of stainless steel pull rods are symmetrically distributed on the two sides of the steel truss.The exquisite steel support rods and the stainless steel pull rods are symmetrically arranged, the conical tensioner and the adjusting pull rod are matched, a stable self-balancing tension system is formed, horizontal external forces, such as wind loads and earthquake actions, borne by the building during service can be effectively offset, and a significant out-of-plane bending moment of the glass panel can be avoided.

The utility model relates to the technical field of immersed tube construction, in particular to a communicating tube grouting structure and an immersed tube joint. The grouting structure comprises a bin grid, a first exhaust pipe and a second exhaust pipe, a bin grid cavity is formed in the bin grid, the bin grid cavity is divided into a grouting area and a vacant area by a partition plate, and a first through hole is formed in the partition plate; the first exhaust pipe communicates with the grouting area and the outside atmosphere, an upper port of the first exhaust pipe is higher than the partition plate, the second exhaust pipe communicates with and blocks the first through hole, and the second exhaust pipe extends into the vacant area. The first exhaust pipe and the second exhaust pipe are arranged, redundant grout can flow into the first exhaust pipe and the second exhaust pipe in the grouting process, the grout level in the exhaust pipes is increased, the grouting amount can be controlled by observing the grout level in the first exhaust pipe, and therefore it is guaranteed that the grout in a grouting area is filled compactly; and the cross section size of the second exhaust pipe is small, so that the weight increased due to the fact that redundant slurry in the bin cells is left in the second exhaust pipe is small, and the weight of the bin cells cannot be excessively increased.

The invention relates to a connector and an accessory of electronic equipment, the connector is detachably embedded in a circuit board, and the connector comprises an insulation structure; a part of the structure is arranged in the insulation structure, the terminal assembly comprises a first conductive part and two groups of second conductive parts, and the first conductive part and the two groups of second conductive parts are oppositely arranged along the thickness direction; the first conductive part located on the first side penetrates out of the insulation structure in the first direction and abuts against the circuit board; the two groups of second conductive parts are symmetrically arranged in the second direction, and the two second conductive parts located on the first side can penetrate out of the insulation structure in the first direction and abut against the circuit board; and the side part of the circuit board is provided with conducting strips corresponding to the second conducting parts and the first conducting parts. The first conductive part and the second conductive part are respectively arranged by utilizing the side part space of the connector, the space layout of the side part is reasonably planned, the sectional dimension of the connector is effectively reduced, the miniaturization and lightweight design of the connector is realized, and the occupied space is reduced.

The invention relates to a connecting joint of a prestressed concrete beam and a steel reinforced concrete column. The connecting joint comprises the prefabricated steel reinforced concrete column with an overhanging short beam, the prefabricated prestressed concrete beam, a flange plate, bolts, embedded anchor bars, embedded profile steel and prestressed bars. The pre-embedded profile steel and the pre-stressed rib pipes are respectively arranged in the overhanging short beams; the end parts of the overhanging short beam and the prefabricated prestressed concrete beam are fixedly connected through a flange plate; the embedded anchor bars are arranged in the prefabricated prestressed concrete beams; one end of the pre-embedded profile steel extends to the outer part of the overhanging short beam to form a profile steel tenon; tooth grooves correspondingly spliced with the profile steel tenons are formed in the inner ends of the prefabricated prestressed concrete beams. The prestressed tendons are arranged in the prestressed tendon pipes and extend into the prefabricated prestressed concrete beam. The bearing advantages of the prestressed concrete structure and the steel reinforced concrete structure can be brought into full play, large deformation of the soft rock tunnel can be resisted, and safe and flexible supporting measures are provided.

The utility model provides a municipal road raining water tank culvert and miniature pipe gallery pipeline system, and relates to the technical field of municipal road and pipeline design. The pipeline system is characterized in that sidewalks and green belts for separating the sidewalks from roadways are arranged on the two sides of a municipal road, and the pipeline system comprises a pipe gallery assembly installed below the sidewalks on one side; the sewage pipe is arranged on one side of the pipe rack assembly; the rainwater box culvert is arranged below the green belt on the other side; the gas pipe is arranged below the sidewalk on the other side; the pipe gallery assembly comprises a cushion layer, a box body, a plurality of electric power supports, an electric power pipe, a plurality of communication pipe supports, a communication pipeline, a water supply pipe and a reclaimed water pipe. The rainwater box culvert and the sewage pipe are separately and independently arranged and are not contained in the pipe gallery, the section size of a common pipe gallery is reduced, the burial depth of the miniature pipe gallery does not need to be increased along with the burial depth of the gravity pipe, and the problems that the common pipe gallery is large in section size, large in excavation depth and high in manufacturing cost are solved.

The utility model relates to the technical field of clothes sorting, in particular to a steel belt type clothes conveying device which comprises a machine frame, a steel belt type conveying belt and a conveying power mechanism. The steel belt type conveying belt comprises a steel belt guide rail, a steel belt main body and a steel belt guide wheel assembly which are arranged on the rack, the steel belt main body is arranged on the steel belt guide rail through the steel belt guide wheel assembly, and a meshing transmission part matched with the driving transmission gear or the driven transmission gear and a hanging part used for hanging a clothes hanger are formed on the steel belt main body; the steel belt guide rail, the steel belt body, the steel belt guide wheel assembly and the conveying power mechanism are matched to replace a traditional chain type conveying line, the structure is simpler and more reasonable, the section size of the conveying guide rail can be reduced, the overall manufacturing cost can be reduced, turning is smoother, noise is low, and the conveying efficiency is improved. The automatic conveying device can be better suitable for automatic conveying of clothes.

The utility model relates to the related field of large-span building steel structure connection, in particular to a connecting joint of a plane steel truss and a circular steel pipe column, which comprises a steel plate connected with a lower chord of the plane steel truss through a reinforcing piece. The circular cover plate is connected with the end part of the circular steel pipe column; the basin type anti-seismic hinged support is arranged between the steel plate and the circular cover plate, and the two ends of the basin type anti-seismic hinged support are fixed to the steel plate and the circular cover plate respectively; the pot-type anti-seismic hinged support is fixedly connected with the circular cover plate and the steel plate respectively, so that hinged connection of the lower chord and the steel pipe column can be well achieved, rigid connection of the lower chord and the steel pipe column is avoided, and bending moment generated on the steel pipe column is greatly reduced. Meanwhile, the section size of the steel pipe column can be effectively reduced, the capacity of bearing large vertical pressure, pulling force and horizontal shearing force is achieved, meanwhile, the section size of the steel pipe column can be effectively reduced, and good anti-seismic performance is achieved.

The present invention provides a high-performance slender sonic toothbrush motor, comprising a shell, a stator core, a coil winding, a motor shaft and a permanent magnet component, wherein the stator core comprises a core magnet matched with the coil winding, and a core body matched with the permanent magnet component; the core magnet comprises a winding portion and a magnetic arm portion extending from the winding portion, the coil winding is wound on the winding portion, and the coil winding and the winding portion are distributed at the end of the motor shaft along the axial direction of the motor shaft, the permanent magnet component, the core body and the magnetic arm portion all extend straight along the axial direction of the motor shaft, and the permanent magnet component, the core body and the magnetic arm portion are distributed in sequence inside and outside along the radial direction of the motor shaft, thereby reducing the cross-sectional size of the sonic toothbrush motor, making it easy to make the sonic toothbrush motor slender, and thus being better suitable for electric toothbrushes with a slender shape, ample internal space in the length direction, but relatively tight internal space in the width direction, thereby greatly improving applicability.

The invention relates to a novel multilayer composite traffic steel truss girder bridge and a construction method thereof. The novel multi-layer composite traffic steel truss girder bridge comprises equal-height section truss piece sets, middle fulcrum bracket section truss piece sets, an upper-layer bridge deck system, a lower-layer bridge deck system, equal-height section supporting rods, bracket section supporting rods, bracket section transverse links, track bridge piers, track beams, hanging type stairway beams and hanging type gallery bridges. The equal-height section steel truss girder is a space truss structure system composed of an equal-height section truss piece set, an upper-layer bridge deck system, a lower-layer bridge deck system and equal-height section supporting rods. The equal-height section steel truss girder is connected with a bracket section steel truss girder composed of a middle fulcrum bracket section truss piece set, a bracket section transverse link and a bracket section supporting rod. According to the rail bridge, the rail bridge piers and the rail beams are arranged at the center positions of the upper chord nodes of the main trusses of the truss piece sets at the equal-height sections, the span application range of the steel truss bridge is expanded, the wide prospect of large-scale application is achieved, and sharing of bridge location resources in urban dense areas is promoted.

The utility model discloses an automobile and an A column reinforcing structure which can meet the design requirement of lightweight of an automobile body on the premise of meeting safety performance. The A-column reinforcing structure comprises an A-column outer plate, an A-column hot air expansion tubular beam and a tubular beam connecting bracket; the A-pillar outer plate comprises an A-pillar connecting flat plate, the two sides of the A-pillar connecting flat plate are correspondingly connected with a first side plate and a second side plate, the first side plate is connected with a front windshield or a roof of an automobile, and a first mounting cavity is formed between the first side plate and the second side plate; the tubular beam connecting support is installed in the first installation cavity and fixedly connected with the A column connecting flat plate, the tubular beam connecting support comprises a support connecting flat plate fixedly connected with the A column connecting flat plate, the two sides of the support connecting flat plate are correspondingly connected with a third side plate and a fourth side plate, and a second installation cavity is formed between the third side plate and the fourth side plate; the A-column hot air expansion tubular beam is installed in the second installation cavity, and the two side faces of the A-column hot air expansion tubular beam are fixedly connected with the third side plate and the fourth side plate correspondingly.