35results about How to "Exert mechanical properties" patented technology

The invention discloses a hollow interlayer pipe wall compound steel pipe concrete wind power tower with ribs. The tower comprises a cast-in-place reinforced concrete foundation and a steel pipe concrete tower section set. Steel pipe concrete tower sections are connected through horizontal flange discs to form a vertical tower cylinder, meanwhile, the bottom of the tower cylinder is fixed on the cast-in-place reinforced concrete foundation, the steel pipe concrete tower sections comprise inner steel pipes, outer steel pipes and concrete layers cast in the interlayers between the inner steel pipes and the outer steel pipes, first reinforced ribs are arranged on the peripheries of the outer walls of the inner steel pipes, and second reinforced ribs are arranged on the peripheries of the inner walls of the outer steel pipes. Compared with an existing steel tower, the compound steel pipe concrete structure with a hollow interlayer and with the pipe walls provided with the ribs is used, the reinforced ribs are arranged on the pipe wall sides where the inner steel pipes and the outer steel pipes are in contact with concrete, the interface binding force of the steel pipes and the concrete is enhanced, the bearing capacity and the ductility of the tower are improved, and early local buckling damage of the thin-wall steel pipes can be avoided or delayed.

The invention discloses a reducing screw displacement pile drilling tool and a construction method. The drilling tool comprises a hollow inner drill stem; the inner drill stem is a cylinder on the outer wall of which external threads are formed; a displacement body with internal threads is connected to the outside of the inner drill stem by use of the threads; the displacement body is a spindle body which is thin in two ends and thick in middle part. A method for carrying out construction by using the drilling tool comprises the following steps: the power head of an in-position drilling machine rotates forward and the displacement body reaches a first supporting course depth; the inner drill stem continue drilling downwards until a screw drill bit reaches in a second supporting course position; the power head rotates backwards, concrete is poured, the drilling tool is lifted, and then the screw pile body is formed; when the screw drill bit goes up to the first supporting course position, the power head rotates forwards and concrete is poured continuously, and the displacement body rotates and is lifted so that the cylindrical pile is formed; the drilling tool is pulled out and then the pile body is formed.

The invention discloses a three-dimensional printing method of a metal-based composite material and belongs to the technical field of formation of composite materials. The method comprises the following steps: laying CAD models of parts of the metal-based composite material along direction Z, and generating section outline information of the parts; respectively printing liquid metal and reinforcing materials layer by layer according to the section outline information; after all layers are printed, obtaining the metal-based composite material by machining. The method is simple in formation process, high in operability and high in designability because the reinforcing material can be randomly orientated according to a design angle.

The invention provides a preparation method of a diamond-ceramic composite material based on photocuring molding, which comprises the following steps: weighing diamond powder and titanium powder, and plating titanium on the surface of diamond through a molten salt method to obtain a diamond titanium-plated layer; coating the titanium-plated surface of the diamond with paraffin through a ball milling method, and obtaining a paraffin layer; weighing the secondarily coated diamond particles and glass phase ceramic powder, uniformly mixing in a ball mill, then drying in a drying oven, taking out and sieving to obtain diamond-glass phase ceramic mixed powder; putting the obtained mixed powder, light-cured resin, a dispersing agent and the like into a homogenizer, and uniformly mixing to obtain light-cured diamond-ceramic composite material slurry; then, performing DLP printing in an additive manufacturing technology; and carrying out thermal sintering to obtain the photo-cured DLP printed part containing the diamond-glass phase ceramic composite material. The part prepared through the method has the beneficial effects of being high in forming precision, high in shape complexity and good in comprehensive mechanical property.

Disclosed is an FRP (fiber reinforced plastic)-steel bone reinforced composite column structure. The FRP-steel bone reinforced composite column structure is characterized by comprising an FRP layer (1), concrete (2), ribs (2) and a steel bone (4); the ribs (3) and the steel bone (4) are in the axial direction of the composite column structure and are coated with the concrete (2), the steel bone (4) is located in the center of the section, the ribs (3) are uniformly distributed along the inner side of the edge of the section, and the FRP layer (1) wraps the concrete (2) from the periphery. By the arrangement, shortcomings existing in the publicly known steel bone concrete structure and concrete-filled steel tube structure are overcome, the internal steel bone is bound more effectively by FRP layer constrained concrete, sufficient bearing capacity storage and stretchability of the structure are achieved, requirement on constructive scaffolds and formwork is reduced, the structure is convenient in construction and low in cost, good comprehensive benefits of the structure are realized, and the composite column structure is applicable to members of columns, piers and the like in the field of civil engineering.

The invention relates to a pre-tensioning method broken-line reinforcement idler wheel bending device shaped like a Chinese character ''fei''. The pre-tensioning method broken-line reinforcement idlerwheel bending device comprises an idler wheel bending device shaped like the Chinese character ''fei'', a mounting base, an anchor bolt and a connecting device connecting the idler wheel bending device shaped like the Chinese character ''fei'' with the mounting base, wherein the idler wheel bending device shaped like the Chinese character ''fei'' comprises a supporting pipe, idler wheels and fixing bolts; the supporting pipe is a round pipe, a base mounting blind hole connected with the upper end of a connecting rod is formed in the bottom of the supporting pipe, and a row of n mounting holesthrough which screws of the fixing bolts penetrate are formed in the upper part of the supporting pipe; and grooves are formed in the middles of the idler wheels, circular holes are formed in the centers of the cross sections of the idler wheels, and idler wheel spacer bushes are installed in the circular holes in a sleeved mode. In the state of installation and use, the screws of the fixing bolts penetrate through the mounting holes in the round pipe, and the idler wheels are installed at the two ends of the screws correspondingly in a sleeving mode. The idler wheels are locked by the head portions of lock nuts and the fixing bolts, and the round pipe and the two rows of idler wheels form a shape like the Chinese character ''fei''. The bending device can avoid the bending point and breaking point effect, protects pre-stressed ribs from being bitten or indented, has convenient construction and good structural mechanical properties, and can prevent the pre-stressed ribs from slipping out.

The invention discloses a tunneling device with the drilling distance being adjustable and a tunneling machine. The tunneling device comprises a cutterhead, multiple heads, a fixing mechanism and drilling mechanisms, and the heads are vertically arranged on the cutterhead and slidably connected with the cutterhead. The fixing mechanism is used for fixing the heads sliding on the cutterhead onto the cutterhead so as to adjust the positions of the heads on the cutterhead. The drilling mechanisms are arranged on the cutterhead and comprise drill rods capable of stretching out and drawing back inthe axial direction on the cutterhead. The drilling mechanisms are arranged on the cutterhead, drilling pre-breaking to to-be-excavated rock mass is completed through the drilling mechanisms, then theheads are arranged on the cutterhead and slidably connected with the cutterhead, the positions of the heads on the cutterhead are adjusted, finally the to-be-excavated rock mass is tunneled through the cutterhead with the positions of the heads adjusted, the mechanical property of the heads can be better exerted, and therefore the aim of efficiently tunneling the to-be-excavated rock mass is achieved.

The invention provides a method for determining a gap between auxiliary shoulders of a double-shoulder drill pipe joint. The method comprises the steps that a three-dimensional geometric model of thedouble-shoulder drill pipe joint is established according to the measured size data, and is subjected to grid division based on a multiblock grid method, and a three-dimensional elastoplastic finite element calculation model of the double shoulder drill pipe joint is established; on this basis, the three-dimensional force characteristics of double-shoulder drill pipe joints with different auxiliary shoulder gaps under the action of different axial forces are obtained based on the three-dimensional elastoplastic finite element analysis; and the gap between the auxiliary shoulders of the double-shoulder drill pipe joint which is most suitable for the axial force characteristics of a well section is preferably determined according to the depth characteristics of each section of a drill stem in ultra-deep well drilling operation. The method can determine the optimal gap between the auxiliary shoulders of the double-shoulder drill pipe joint so as to meet the requirements of different welldepth operations, and has very important significance on the improvement of the usability of the double-shoulder drill pipe joint, the prolonging of the service life of the double-shoulder drill pipejoint, and the reduction of the operation cost.

The invention discloses a fiber winding machine and a winding method. The fiber winding machine comprises a moving device, a core mold, a warp winding head, weft winding heads and warp supply devices; the warp winding head is arranged on the outer side of the moving device in a surrounding mode, the core mold is arranged on the moving device, and the core mold and the warp winding head are coaxially arranged; the weft winding heads are arranged at the positions, on the two sides of the warp winding head, of the moving device; and the warp supply devices are arranged on the two sides of the moving device and connected with the warp winding head. The helical angles of warps on the same layer flat laid on a cylindrical surface relative to the axis of the core mold are the same, and mutual overlapping does not exist; the adjacent warp layers in the radial direction of the cylindrical surface do not overlap with each other, so that cross bending of fibers is reduced, the mechanical property of the high-strength fibers can be better exerted, and winding bodies are firmer and lighter; and compared with a traditional fiber winding machine, the production efficiency of the winding machine can be greatly improved.

The invention provides an epoxy floor coating, which comprises the following raw materials in parts by weight: 100 parts of a bisphenol A epoxy resin solution, 10-15 parts of a graphene microchip, 2-6parts of zinc powder, 0.5-1 part of polyamide wax slurry, 3-8 parts of n-butanol, 25-60 parts of xylene, 0.08-0.2 part of dibutyl phthalate and 0.1-0.2 part of polydimethylsiloxane. The graphene of the epoxy floor coating is uniformly dispersed and highly dispersed, so that the mechanical property of the graphene is brought into play, the impact resistance of the epoxy floor coating is effectively improved, the problem of electrical corrosion of the graphene is avoided, and the service life of the floor coating layer is effectively prolonged.

The invention relates to a walnut shell based ecological composite structure material and a preparation method thereof. The method comprises the following steps: (1) simply processing walnut shells byremoving kernels and drying; (2) arranging the dried walnut shells in a mold; (3) heating an additive, and pouring the additive into the mold; (4) in the additive cooling process, carrying out stamping, air hole removing and cooling forming on a material in the mold; and (5) taking out the material from the mold and machining the material to obtain the walnut shell based ecological composite structure material. Compared with the prior art, the method has the advantages that the process is simple, the universality is high, the method can be popularized in walnut original places, walnut shell productivity is consumed, and economic development of villages and towns is promoted.

The invention provides a compound spherical shell of a spherical robot. The compound structure of the spherical shell comprises a rigid substrate shell and a flexible coating layer, wherein the rigidsubstrate shell is made of structural type fiber reinforced compound material and is compounded by reinforced fibers and a thermosetting resin substrate; a honeycomb-shaped stiffening rib is arrangedon the inner surface of the rigid substrate shell, is made of thermosetting resin and can be subjected to integral hot press molding with the rigid substrate shell; the flexible coating layer is madeof copolymer elastomer materials. The light compound spherical shell has high specific strength, specific stiffness, rolling friction coefficients and impact energy dissipation factors and also has aquick repairing function. The spherical shell and the corresponding spherical robot serve as an open type automatic control platform, and various functional spherical robots can be developed and derived on the basis of the compound spherical shell of the spherical robot.

The invention discloses an intelligent drilling device for underground engineering and a heading machine. The drilling device comprises a drilling mechanism, a detection module and a control module. The drilling mechanism is arranged on a fixed disc and comprises a drill rod capable of axially extending and retracting on the fixed disc and a driving assembly used for driving the drill rod to axially extend and retract and axially rotate. The detection module is used for detecting rock debris in the process that the drilling mechanism drills into to-be-excavated rock mass and rock mass physicaland mechanical parameters of the to-be-excavated rock mass, and analyzing the lumpiness size and the weight distribution rule of the rock debris. The control module is used for adjusting the parameters generated when the driving assembly drives the drill rod to axially extend and retract and/or axially rotate according to the lumpiness size and the weight distribution rule of the rock debris. Parameter adjustment of the drilling mechanism is highly matched with the geological conditions of the to-be-excavated rock mass in real time, then the mechanical performance of the drilling device is better exerted, and the aim of rapid drilling is achieved.

The invention discloses a pultrusion method for a carbon fiber and glass fiber composite board. The pultrusion method comprises the following steps of (1) unwinding yarns on a creel; 2) threading and combing yarns; 3) impregnating carbon fibers in a steeping vat; 4) pre-curing a carbon fiber mold, specifically, pre-curing impregnated carbon fiber yarns through a first pultrusion mold to form a pre-cured carbon plate; (5) impregnating glass fibers in the steeping vat; and (6) finally curing a product, specifically, after glass fiber yarns are impregnated, uniformly distributing the glass fiber yarns around the pre-cured carbon plate according to the specific number of glass fibers, entering a second pultrusion mold, and curing to obtain a carbon-glass mixed pultrusion plate. According to the method, the pultrusion plate which takes the carbon fibers as a sandwich layer and the glass fibers as an outer layer and is used for preparing a blade of a wind power generator can be prepared, the problems that existing carbon fibers are excessive in performance and high in price, and existing glass fibers are insufficient in performance and heavy in mass are solved, the carbon fiber layers in the plate can be neatly arranged in the plate, and the mechanical property of combining the two fibers is exerted to the greatest extent.