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152results about How to "Improve bearing efficiency" patented technology

Multilayer grating bearing cylinder and preparation method thereof

The invention discloses a multilayer grating bearing cylinder and a preparation method thereof. The multilayer grating bearing cylinder is formed by nesting at least two single-layer grating cylinders, and the densities of the meshes of the adjacent single-layer grating cylinders are different. The preparation method for the multilayer grating bearing cylinder made from a composite material comprises the following steps: producing a wood pattern for casting a soft mode, producing a silicon rubber soft mode, assembling a mould, winding the soft mode in an assistance manner, carrying out vacuum bag moulding, demoulding and carrying out after-treatment, and integrally moulding the multilayer grating bearing cylinder; or preparing the single-layer grating cylinders according to the steps, and then assembling the single-layer grating cylinders into the multilayer grating bearing cylinder. The preparation method for the multilayer grating bearing cylinder made from metal or engineering plastic comprises the following steps: preparing a casting mould for the disassembly components of the single-layer grating cylinders, melting and casting, welding, and then assembling the single-layer grating cylinders into the multilayer grating bearing cylinder; or moulding in one step by a 3D printing technology. The multilayer grating bearing cylinder has the characteristics of good structural stability, light mass, high mechanical properties, difficulty of structural overall buckling instability, simple and practicable preparation method, and low cost.
Owner:NAT UNIV OF DEFENSE TECH

Anti-buckling supporting member with lattice type double-rectangular-pipe cross section

An anti-buckling supporting member with a lattice type double-rectangular-pipe cross section comprises two anti-buckling branches which are connected through a plurality of steel batten plates, wherein each branch adopts an anti-buckling supporting member provided with a linear core and a restraint concrete-filled rectangular steel pipe; long edges of the two branches are parallelly arranged at appropriate intervals, a lattice type member formed by connecting the plurality of steel batten plates which are distributed longitudinally is taken as a whole for common work, the steel batten plates and branch short edges, namely short edges of the restraint rectangular steel pipes, are in welded connection through trihedral angle welding seams; and end parts of the linear cross section cores of the two branches extend out of circumferential restraint members, and are connected through a ribbed plate to form an H-shaped cross section which can be connected with a frame member through a high-strength bolt and a connecting plate. The lattice type cross section can increase inertia moment of the whole cross section of the anti-buckling supporting member and the whole flexural rigidity, thereby particularly suitable for a design of a large-tonnage anti-buckling support member, the support end part is conveniently connected with the frame member, and the lower branch still can sufficiently play energy-dissipating capacity when eccentric bending moment is added.
Owner:TSINGHUA UNIV

Desilting operation ship

The invention discloses a desilting operation ship. A ship body is provided with a high-pressure air generator for sucking silt through jet, and is also provided with a gravitational energy mud-waterseparation device, a mud sucking pipe lifting device and a high-pressure air pipe extension device; an intake pipe of a high-pressure air pipe communicates with the high-pressure air generator, and aspraying end is upwards inclined underwater by the high-pressure air pipe extension device to extend into a pipe at the lower end of the mud sucking pipe for fixation; the mud sucking pipe is vertically mounted at the tail part of the ship body; an outlet end of the mud sucking pipe communicates with an inlet of the gravitational energy mud-water separation device; and the gravitational energy mud-water separation device feeds leached silt to a silt bin. The water ratio in a mud-water mixture sucked by the desilting operation ship is prominently reduced, so that the bearing efficiency of the silt bin is improved, and the construction efficiency is improved; the mud-water separation device is operated by using dead weight of the sucked silt without additionally arranging a power device; andin particular, the desilting operation ship is suitable for the water quality purifying engineering of such natural water as vast river channels, lakes and reservoirs.
Owner:陈欢

Carriage covering composite material with silkworm cocoon-imitating winded and braided structure and preparation method thereof

The invention relates to a carriage covering composite material with a silkworm cocoon-imitating winded and braided structure and a preparation method thereof. The carriage covering comprises six sets of yarn systems penetrating the composite material in circumferential, radial and axial directions. Characteristics are that: knitting yarn is arranged at every layers uniformly along the axial direction of a mandrel; winding yarn is winded layer by layer along the circumferential direction of the mandrel, and the knitting yarn and the winding yarn are interweaved layer by layer, so that the layers are overlapped with each other to form an interlocking structure; reinforcing rib yarn of the axial and circumferential directions is sandwiched among the winded and braided layers; and the fabric is penetrated by stitching yarn of the circumferential and axial directions along the circumferential and axial directions, and all the layers are connected to be a whole. The composite material is prepared according to winding and braiding principles of silkworm cocoons. The preparation method comprises following steps: (1) preparing the mandrel; (2) arranging the yarn; (3) winding and braiding; and (4) assembling and fastening. Carriage covering composite material processes excellent performances, such as high integrity, light weight, excellent wrinkle resistance and impact resistance. The composite material can be applied for locomotives and carriages of aerodynamic aerotrains with simulated wings.
Owner:BEIHANG UNIV

System and method for Ether-passive optical network bearing digital television program

The invention relates to a system and a method for bearing digital television programs in an Ethernet passive optical network and the system is composed of OLT, a video server, an EPG server, ODN, ONU and an IP set-top box. Mutual communication is realized by the connection between OLT and the video server and between the OLT and the EPG server through the Ethernet; the OLT is provided with optical fiber interfaces which are connected with the ODN and the OLT is connected with the ONU via the ODN by optical fiber, thereby completing the downlink delivery and uplink transmission of the Ethernet frames of each ONU and completing the reception of the uplink business of each ONU by utilizing TDM; the ONU is connected with the IP set-top box by twisted pair lines and video access terminals consisting of the IP set-top box and a TV terminal are connected by AV lines. All users under the management of the OLT of the invention can complete the reception of programs by multicast frames. Programs not accepting request are cached in the video server of the OLT, which occupies no downlink bandwidth of EPON, thereby improving the bearing efficiency of the EPON to DVB business and the utilization of the downlink bandwidth of the EPON greatly.
Owner:SHANDONG UNIV

Multi-anchor-point mooring power installation anchor and installation method thereof

The invention belongs to the technical field of ocean engineering, and relates to a multi-anchor-point mooring power installation anchor and an installation method thereof. The multi-anchor-point mooring power installation anchor is provided with a plurality of anchor eyes, can be connected with a plurality of floating structures at the same time, and is very suitable for the fields of offshore wind turbines, marine ranching, offshore solar power generation and the like which are arranged in groups or in pieces. Due to the design of the multi-anchor-point mooring power anchor, the horizontal load acting on an anchor body can be reduced or even eliminated, so that the load acting on the anchor body is mainly a vertical pull-up load, the load bearing mode of the anchor body is optimized, andthe bearing efficiency of the anchor body is improved. Due to the design of a normal wing plates, the resistance borne by a combined anchor can be reduced. In the recovery process of a booster, the normal wing plates gradually extend out of the anchor body, the normal loading area of the multi-anchor-point mooring power installation anchor is increased, and then the bearing efficiency of the anchor is remarkably improved. The anchor is high in installation efficiency, low in cost, high in bearing efficiency and good in loading mode, and the installation cost of an anchoring foundation can beremarkably reduced.
Owner:DALIAN UNIV OF TECH

Construction method for ultra-high-performance concrete corrugated steel web composite box girder bridge

The invention discloses a construction method for an ultra-high-performance concrete corrugated steel web composite box girder bridge. The construction method comprises the steps that a U-shaped groove structural part of each span of box girder is prefabricated according to the design requirements at first; a bridge floor middle plate is prefabricated according to the prefabricated U-shaped groove structural part; a bridge abutment and a bridge pier are constructed, the prefabricated U-shaped groove structural part and the bridge floor middle plate are hoisted in position, transverse connecting steel bars are bound, and after transverse wet joints are poured, the complete box girder is formed; the next bridge pier is constructed, a second box girder is hoisted in position, corrugated steel webs of the adjacent box girders are welded, longitudinal connecting steel bars between the adjacent box girders are bound, longitudinal wet joints between the adjacent box girder segments are poured or a cross girder is casted in place, and a continuous bridge structure is formed; after wet joint concrete reaches the designed strength value, top plate prestressed steel strands are tensioned; and the above steps are repeated, so that the multi-span continuous bridge structure is completed. According to the construction method for the ultra-high-performance concrete corrugated steel web composite box girder bridge, the box girders are light in weight and small in torsional distortion, the bridge floor plate load distribution capacity is good, construction and erection are convenient, and the construction method has wide application prospects in large and middle span bridges.
Owner:HENAN PROVINCIAL COMM PLANNING & DESIGN INST CO LTD +1

High-rigidity light launching box

The invention discloses a high-rigidity light launching box and relates to a launching box used for supporting, fixing, transporting and storing missiles. The high-rigidity light launching box is high in both circumferential rigidity and longitudinal rigidity and light and can provide large storage space for the missiles, and the stress on the corners of the launching box can be effectively diffused. The high-rigidity light launching box comprises an outer skin, an inner skin, longitudinal ribs and ring ribs evenly distributed between the outer skin and the inner skin. The ring ribs are connected with the outer skin and the inner skin through glue respectively, the ring ribs are installed on the inner skin in a sleeved mode, small rounded corners are adopted for the corners of the inner skin, the outer skin and the ring ribs, the space between the inner skin and the ring ribs is filled with a heat preserving layer, reinforcing blocks are arranged on the corners of the heat preserving layer, filling interfaces are arranged on the longitudinal ribs, a 35-degree laying layer is adopted for the inner skin, the longitudinal rib laying layers and the ring rib laying layers respectively comprise 0-degree laying layers and 90-degree laying layers, the proportion of the laying layers of the longitudinal ribs is as follows: n 0 degree: n 90 degrees= 2:1- 3:1, and the proportion of the laying layers of the ring ribs is as follows: n 90 degrees: n 0 degree= 2:1- 3:1.
Owner:BEIJING INST OF SPACE LAUNCH TECH +1

Novel light power installing anchor and installing method

The invention belongs to the technical field of oceanographic engineering, and relates to a novel light power installing anchor and an installing method. The novel light power installing anchor is mainly composed of a wing plate, an anchor bar and a connecting rod. The wing plate is formed by symmetrically splicing two triangular flat plates. The connecting rod is installed at the tail portion ofthe wing plate. The anchor bar is of an inverted V type structure composed of two trapezoid flat plates and is symmetrically fixed to the wing plate. A propeller can be fixed at the tail portion of the novel light power installing anchor through a shear pin, and the novel light power installing anchor, the propeller and the shear pin are combined to form a combined anchor; the combined anchor is put in seawater, an installing anchor chain is released, and the combined anchor penetrates into soil; the installing anchor chain is tensioned, the shear pin is cut off, the propeller is pulled out, and the novel light power installing anchor is left in soil; a working anchor chain is tensioned, and the angle of the novel light power installing anchor is adjusted; the propeller is used for installing a next novel light power installing anchor after being taken out. The novel light power installing anchor has the advantages of being light in weight and high in bearing efficiency, improving thesinking and penetrating depth in soil and reducing cost.
Owner:DALIAN UNIV OF TECH

Arched girder combined type concrete continuous girder bridge structure

The invention discloses an arched girder combined type concrete continuous girder bridge structure. The arched girder combined type concrete continuous girder bridge structure comprises a plurality of main piers. A pier top stand column and a pier top girder section are arranged at the top of each main pier and connected with two arched girder combined frames arranged on the two sides of the pier top stand column and the pier top girder section. Each arched girder combined frame is composed of a lower string arched box girder and an upper string box girder. The upper string box girders are horizontally arranged and stretch out from the two ends of the pier top girder sections to the two sides of the main piers in the bridge direction. The lower string arched box girders are obliquely arranged and stretch out from the lower ends of the pier top stand columns to the two sides of the main piers in the bridge direction. The lower string arched box girders and the upper string box girders are joined on the two sides of the main piers. The upper string box girders are pulled, the lower string arched box girders are pressed, and therefore the lower string arched box girders and the upper string box girders reach force balance; and the girder axes of the lower string arched box girders arch up, part of bending moment generated by self eight is counteracted, and an arched structure which is mainly pressed and even in stress distribution is achieved.
Owner:CCCC SECOND HIGHWAY CONSULTANTS CO LTD
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