11results about How to "Increased longitudinal stiffness" patented technology

The application provides a small satellite platform structure which carries a large amount of propellant and is connected and separated in point mode, belongs to the technical field of spacecraft structure, and comprises a frame, a bottom plate, a lower cabin partition plate, a storage tank support rod, a middle layer plate, an upper cabin partition plate, a top plate and a side plate, so that the side plate surrounds the parallelly arranged bottom plate, middle layer plate and top plate into a closed box body, the bottom plate is connected to the frame, the storage tanks are arranged diagonally in the round holes on the bottom plate and the middle layer plate, and the storage tank support rods are uniformly distributed around the round holes; the middle layer plate separates the box body into an upper cabin and a lower cabin, the upper cabin partition plate is connected in the upper cabin, and the lower cabin partition plate is connected in the lower cabin. The application proposes a configuration of "point connection + storage tank sinking", meets the demand of the small satellite platform for carrying a large amount of propellant, effectively reduces the whole satellite center of mass, and improves the satellite dynamic environment; meanwhile, the bottom main load-bearing frame cooperates with a detachable adapter block, can adapt to different mechanical interfaces of launch vehicles, and realizes point connection and separation.

The present invention provides a vertical stranding tensioning oblique braided insulating pipe production line, comprising a tensioning frame, a yarn collecting mechanism, an inner mold forming mechanism, a first immersion tank, a first curing device, an outer mold forming mechanism, a second immersion tank and a second curing device arranged in sequence from top to bottom, characterized in that: the outer mold forming device comprises a circular loom and an outer mold tensioning frame distributed around the circular loom, and the fibers on the outer mold tensioning frame are woven obliquely on the inner mold surface after passing through the circular loom. The present invention twists the fiber yarn into a plurality of reinforcing rib strands through a special yarn collecting mechanism, and arranges them between the inner and outer molds to form a pipe with spiral reinforcing ribs inside after curing, thereby improving the overall strength of the pipe.

The present application discloses a longitudinal rib and a welding structure with a top plate, which solves the problem that the longitudinal rib and the top plate through-length straight weld in the prior art are prone to fatigue cracking. The key points of the technical solution are to provide a longitudinal rib, the longitudinal rib includes at least one web, the upper edge of the web has an ear plate folded to one side, the web and the ear plate have a rotation angle β, 90°≤β<134°; the outer end of the ear plate is an outer edge, the side length of the outer edge is greater than the longitudinal length of the longitudinal rib, and at the same time, a welding structure of the longitudinal rib and the top plate is provided, which increases the virtual width of the weld, and because there are welds in the longitudinal and transverse directions in the plane, the weld's ability to withstand complex isotropic loads is improved, and the weld is located at the outer edge, away from the stress sensitive area, which greatly reduces the probability of fatigue cracking of the weld.

The invention discloses a straddle type seamless track beam, and relates to the technical field of track traffic bridge engineering, the straddle type seamless track beam comprises a main beam assembly, the main beam assembly comprises a walking track formed by connecting a plurality of corrugated steel web box beams end to end, the corrugated steel web box beams are laid in the bridge direction, and a plurality of pier beam consolidation areas are arranged in the corrugated steel web box beams; stiffening rib units laid in the length direction of the walking track are symmetrically arranged on the two sides of the corrugated steel web box girder; the bridge pier assembly comprises end supporting units arranged at the bottoms of the two ends of the walking track, each end supporting unit comprises a plurality of parallel end triangular piers, each end triangular pier is provided with a vertex angle close to the corrugated steel web box girder and two base angles located below the vertex angle, and the vertex angles are connected with a pier beam consolidation area. And the close bottom angles of the two adjacent end triangular piers are connected into a whole. The corrugated steel web box girder can provide a complete walking bridge floor, and the running stability of the train is improved.

This invention discloses a low-floor all-aluminum vehicle chassis, consisting of a front axle, a central battery compartment, and a rear axle module connected sequentially. The central section is low, while the sides are higher, with a height difference of 240–250 mm. The load-bearing frame of the central battery compartment connects the crossbeams and longitudinal beams via mortise and tenon joints, forming a grid-like inner frame and three battery compartments, upon which the floor is mounted. The front and rear axle modules are connected to the frame and crossbeams via mortise and tenon joints, supplemented by mechanical reinforcement. This invention employs a three-segment all-aluminum height-difference structure, achieving lightweight, high rigidity, and high battery capacity synergistically for a 6-meter-class Class I low-floor minibus. The grid-like inner frame formed by the central grid-like mortise and tenon joints enhances rigidity and optimizes force transmission, while also forming three battery compartments, increasing battery capacity from 71 kWh to 105 kWh, significantly extending range. The all-aluminum design reduces weight by over 1 / 3, lowering energy consumption. The modular design improves assembly precision and efficiency, overcoming the technical bottleneck of adapting all-aluminum structures to Class I low-floor designs, providing an accessible, low-carbon, and highly reliable microbus chassis solution.

The utility model discloses a high-strength car tire, which relates to the technical field of car tires, and comprises a tire body and a tread pattern side ditch, a tire body is arranged in the tire body, the surface edge of the tire body is provided with the tread pattern side ditch adopting asymmetrical pattern design, and the tread pattern side ditch is provided with a tread pattern. And the bottom of the tire body is directly wrapped on the steel wire ring through the soft triangular rubber core. According to the utility model, the tire tread pattern side ditches with asymmetric pattern design are beneficial to stone removal, and damage to the bottoms of the ditches is avoided, so that the strength of the tire body is improved. The bottom of the tire body is directly wrapped on the steel wire ring through the soft apex core, so that the bearing capacity of the ring part can be improved, and the strength of the tire is improved. According to the tread pattern block, the steel sheets are arranged in the cutter grooves of the tread pattern block, so that the longitudinal rigidity of the tread pattern block is improved, the surface grip performance of the tread pattern block is better, and the wet skid resistance of a tire can be improved.

The present application relates to the technical field of vehicle body structure, and particularly refers to a vehicle body structure with reinforced IBC mounting part and a processing method. The vehicle body structure comprises a front wall assembly, the front wall assembly comprises a front wall, a reinforcing plate and a reinforcing beam which are all arranged on the rear side of the front wall, the reinforcing beam is vertically fixed in the middle region of the front wall to form a cavity beam structure with the front wall; the reinforcing plate comprises a fitting part which is fixedly attached to the IBC mounting plate, and a reinforcing part which is integrally connected to the fitting part, the fitting part is provided with a mounting hole group for mounting IBC corresponding to the IBC mounting plate, the reinforcing part surrounds the fitting part and is fixedly attached to the front wall to form a cavity beam structure with the front wall, and is used for transmitting load to the front wall, and the opposite sides of the reinforcing part and the reinforcing beam are fixedly attached to the front wall in a laminated manner. The longitudinal and vertical strength of the front wall can be improved by the reinforcing beam, the cavity beam structure is formed between the reinforcing plate surrounding the IBC mounting part and the front wall, the load of the IBC can be dispersed to the reinforcing part and the front wall to suppress shaking during driving.

The present invention provides a method for excavating a pilot tunnel with a micro-core soil, and relates to the technical field of underground construction engineering. The method for excavating a pilot tunnel with a micro-core soil comprises the following steps: S1. A small guide tube is set along the top of the pilot tunnel excavation surface, and then grouting is performed in the small guide tube; S2. The pilot tunnel is excavated with a full section, and the micro-core soil is retained in the pilot tunnel at the same time; S3. Initial concrete is sprayed on the pilot tunnel excavation surface, and then a steel frame N2 with a large arch side wall grid is installed in the pilot tunnel; S4. Next, a side wall grid steel frame N3 is installed in the pilot tunnel, and a connecting plate is used to connect the side wall grid steel frame N2 with a large arch and the side wall grid steel frame N3; S5. Concrete is sprayed on the surface of the initial concrete spraying for a second time to a designed thickness. The present invention provides a method for excavating a pilot tunnel with a micro-core soil, which is convenient and quick to install, improves the excavation efficiency, and solves the problem of arch top sinking and low efficiency in step method excavation.

The invention discloses a shield tunnel segment lining structure suitable for building a subway under a narrow road surface, comprising an A-type segment ring, a B-type segment ring and a middle plate, wherein the A-type segment ring, the B-type segment ring and the middle plate constitute an "8"-shaped integrated shield tunnel segment lining structure, wherein a plurality of circular arc-shaped A-type segments are circumferentially assembled into an excellent arc-shaped A-type segment ring, and a plurality of circular arc-shaped B-type segments are circumferentially assembled into an excellent arc-shaped B-type segment ring, and the two types of segment rings are assembled through a middle plate with a straight surface and triangular protrusions at both ends to form an "8"-shaped structural ring, and the structural ring meets central symmetry and axial symmetry, and a plurality of structural rings are longitudinally assembled to form an "8"-shaped integrated shield tunnel segment lining structure; the upper and lower integrated shield tunnel segment lining has a simple form, is easy to process and manufacture, is convenient to construct, has a strong integrity, is high in strength, has a good bearing capacity, can effectively control ground settlement, ensure the safety of surrounding buildings and structures, and improve construction efficiency.

The invention relates to a lining construction system and method suitable for a side-through slope tunnel, and belongs to the technical field of tunnel engineering. In order to solve the problems that wriggling deformation of a slope body is caused by an existing side-penetrating slope reinforcing measure and the deformation effect influences a supporting structure, two brackets, a transverse supporting component and a vertical supporting component are arranged on a secondary lining structure of a tunnel, each bracket is arranged in the tunneling direction of the tunnel and connected with a secondary lining, and the transverse supporting component is connected with the vertical supporting component; the transverse supporting components are arranged in the width direction of the tunnel and erected between the two brackets, and at least one set of vertical supporting components are arranged and connected between the second lining and the transverse supporting components. According to the lining construction system, the phenomenon of stress concentration of the lining can be avoided, the maximum internal stress borne by the structure is effectively reduced, the requirement for arranging a ventilation system and an electric power system on a vault can be met, the novel lining construction system is fused with secondary lining construction, and the construction efficiency is improved while the tunnel lining strength is improved.

The invention discloses a modular assembly type concrete channel system suitable for abrupt slope mountainous regions, and relates to the technical field of hydraulic engineering and slope treatment, in particular to a modular assembly type concrete channel system suitable for abrupt slope mountainous regions, which comprises an anti-slide pile foundation and a channel main body module arranged on the anti-slide pile foundation. The channel body module is of a U-shaped structure, a male opening is formed in the front end of the channel body module, a female opening is formed in the rear end of the channel body module, and a rubber waterstop is embedded in the inner side of the female opening to achieve sealing connection. The multiple channel main body modules are in butt joint through male and female openings, and prestressed steel cables penetrate through the channel main body modules to enhance integrity. The upper end of the module is lapped with a cover plate, and the inner side wall is provided with drainage holes. The system adopts a modular assembly design, is simple and convenient to construct, can effectively adapt to abrupt slope terrains, and improves the anti-sliding stability and the anti-seepage performance.