52results about How to "Optimized section" patented technology

Stent, as well as a method and device for fabricating the stent, wherein the stent has a tubular lattice structure comprising individual struts and at least one strut of which at least one longitudinal section runs with at least one directional component in the radial circumferential direction of the stent, wherein the surface of the longitudinal section facing the outside of the stent is curved only about the longitudinal axis of the stent. According to the invention, the surface of longitudinal section of the strut, which surface faces the inside of the stent, has such a curvature that the strut cross section is fluidically optimized.

The present invention relates to a diamond trussed traveling form. Said diamond main truss is formed from upper frame, lower frame, front frame and rear frame which are connected together and formed into diamond shape. Said upper frame is inclined towards front-lower side, the front end of upper frame and front end of front frame are fixed on the front support abutment, its upper frame and upper end of rear frame are fixed on the upper support abutment, its rear frame and rear end of lower frame are fixed on the rear support abutment, the front end of its lower frame and rear end of front frame are fixed on the lower support abutment; between lower support abutment and upper support abutment a door-shaped rear hanger frame is connected, on the front support abutment a front hanger beam is fixedly connected; the front hanger beam and the door-shaped rear hanger frame are connected with a suspended mechanism, front end of said front hanger beam is connected with an auxiliary hanger frame, between the rear end of front hanger beam and upper frame a tie rod is connected, front end of the auxiliary hanger frame is connected with a hanger rod, and said hanger rod is connected with a working platform.

The invention discloses a method for preparing a carbon fiber reinforced thermoplastic composite material, which comprises the following steps: 1)alternatively paving carbon fiber and thermoplastic resin in a die, wherein a bottom layer and a top layer of the die are thermoplastic resin, closing the die and applying pressure; 2)accessing power supply to a carbon fiber layer, rapidly heating under current effect, when the temperature is higher than the melting point of thermoplastic resin, fusing thermoplastic resin, dipping carbon fiber under pressure; and 3)breaking power, cooling the die, and then opening the die to obtain the carbon fiber reinforced thermoplastic composite material. The method takes carbon fiber as a heat-generating body, the electrothermal conversion efficiency can reach as high as more than 90%, and the energy saving effect is obvious; simultaneously, carbon fiber is capable of melting thermoplastic resin and completing dipping, and has the advantages of short moulding time and good dipping effect, formation of good cross section of thermoplastic resin and fiber can be realized, composite material performance is increased, and processing of product with large thickness can be realized in short time.

The invention discloses a prefabricated internal support system and a construction method for a foundation pit support system. The prefabricated internal support system comprises a top beam (1), an enclosing purline and an inner support (2), wherein the inner support (2) is a truss type inner support (2) assembled by splicing a pre-stressed hollow square pile (3) and a node connecting piece; first end plates on the two ends of the truss type inner support (2) are in screwed connection with a connecting plate on the top beam (1), and the rest of the first end plates are in screwed connection with second end plates of the node connecting piece; the construction method comprises the key points that the pre-stressed hollow square pile (3) and the node connecting piece are assembled into the truss type inner support (2) in a splicing manner, and the two ends of the truss type inner support (2) are connected with the top beam (1). The prefabricated internal support system and the construction method for the foundation pit support system has the advantages that the system and the method are convenient and efficient, the construction speed is high, the construction period is short, the follow-up earth cutting and earth discharging are convenient, the dismounting process is also convenient, efficient and labor-saving, no safety potential hazard is caused, the system can be recycled, and the material is saved.

An apparatus and method are adapted for characterizing human tissue type. A plurality of inflatable bladders enable the application of kinetic energy to the human tissue. Collected data responsive to the applied kinetic energy differentiates between different tissue types and patient loading. The data can be routed via a network to a remote location.

Handheld tactical knife combining structural features of a structurally advantageous and stress distributing base cross section (FIG. 2A), a penetrating tip (220), tapers in perpendicular axis along the blade length (FIG. 2, FIG. 3), and a cutting edge (212). The preferred embodiment contains scallops (214), a gut hook (218), and a penetrating chisel-type tip (220).

Said formwork consists of a plurality of narrow laminae (2) made of plastified wood or rigid plastic, which are joined to form a tubular body (1) and are fixed with the aid of an outer envelope (3) consisting of a helicoidally wound glassfiber mesh while the inside of said tubular body (1) receives a self-adhesive film (4). Optionally, the formwork may be provided with stiffeners to preserve its cylindrical configuration, said stiffeners being adequately distributed collars (5) or a tubular body (6) made of stretched polystyrene that is placed between the body (1) and the outer envelope (3). The tubular body (1) can be a single plate (7) that is initially flat and whose width matches the diameter of the desired column. Said plate (7) has a plurality of longitudinal cuts (9) on the outer face thereof, which define weakening areas (11) enabling its deformation for the purpose of forming a cylindrical element.

The invention relates to the field of metal processing, and discloses a multifunctional circular pipe metal cutting machine which comprises a base. A first rotating rod is rotatably connected to the interior of the base, a first gear is fixedly connected to the surface of the first rotating rod, and a second rotating rod is fixedly connected to the top end of the first rotating rod; and a foundation support is fixedly connected to the upper surface of the first rotating rod, a first stand column is fixedly connected to the top end of the base, a sliding strip is slidably connected into the first stand column, and a fixing block is fixedly connected to the side, close to the sliding strip, of the first stand column. By arranging a telescopic rod, a clamping plate, a rotating wheel, a connecting rod, the rotating rod and the sliding strip, a double clamping device is formed, metal pipes with different diameters can be clamped, the stable clamping effect can be well achieved, the situation that the metal pipes incline during cutting is avoided, the sections of the cut metal pipes are more perfect, and the practicability of the machine is enhanced.

The device includes a hollow cutting roller with a blade attached to the outer surface of the hollow roller. A stationary shaft is also provided, arranged inside the hollow roller and coaxial therewith. The stationary shaft is connected to a supporting structure and the hollow roller is rotatably supported onto the stationary shaft). A motor drive is provided to rotate the hollow roller around the stationary shaft. The hollow roller is supported onto the stationary shaft by at least a hydrostatic bearing arranged in an intermediate position between the ends of the stationary shaft.

The invention discloses a cable restraint pier anti-seismic structure, which comprises at least one pier which is longitudinally arranged, a left bridge abutment and a right bridge abutment at the left end and the right end and a superstructure which is supported on the piers and the left and right bridge abutments, a first cable is connected between two adjacent piers, the left and right bridge abutments and the piers close to the left and right bridge abutments are all fixed by a second cable, and connecting ends of the first cable and the second cable are both connected in the upper part of the piers. The cable restraint pier anti-seismic structure has simple and novel structure and can solve the problems that the piers generate too large displacement under earthquakes which leads to the damage of the superstructure, the piers generate too large internal force at the bottom of the piers to be damaged under earthquakes, and a foundation generates too large interface force to be damaged under earthquakes.

The invention provides a fabricated prestressed long-span beam structure. The fabricated prestressed long-span beam structure comprises trussed beams, and the trussed beams comprise upper chords, lower chords and a plurality of assembled-connecting units. The upper chords comprise first supporting rods and second supporting rods arranged in parallel at intervals, and the first supporting rods areconnected with the second supporting rod through connecting pieces. The lower chords are arranged under the upper chords and located between the first supporting rods and the second supporting rods, and the lower chords and the upper chords are arranged in parallel. The assembled-connecting units comprise a plurality of web rods, the lower ends of the web rods are arranged adjacent to each other and hinged to the lower chords, the first supporting rods are hinged to the upper ends of part of the web rods, and the second supporting rods are hinged to the upper ends of the other part of the webrods. The web rods connected to the first supporting rods are arranged at intervals, and the web rods connected to the second supporting rods are arranged at intervals. The fabricated prestressed long-span beam structure can be fabricated on site according to the use demand, construction is convenient and quick, costs are reduced, a hinged method is adopted at joints, it is ensured that the shaftof the web rods is not subject to the action of bending moment, green construction is achieved, and maintenance is convenient.

The invention relates to a recovery planer comprising a planer base (2) guided on a conveyor, which has a pivot pin on an inclined support surface (8) for any direction of movement of the planer (7) a swingable support for a knife rest (10), and includes two knife rests (10), each knife rest is supported swingably on the corresponding swing pin (7) by means of a swing support and has A base (18), by means of which the base tool holder (10) is guided on a pivoting surface (31) formed on the planer base below the bearing surface and oriented concentrically to the axis of rotation of the associated pivoting pin (7) . According to the invention, the swivel support of the tool holder (10) is formed as a groove (14) with open edges, by means of which the tool holder (10) can be pushed parallel to the support surface (8) onto the swivel pin (7) in a mounting swivel position. superior. Mounting of each tool holder can then be carried out relatively simply from below.

The invention relates to the improvement of a method for preparing a soft aluminum conductor for an electrician and a molding device. The method is characterized by comprising the following steps of: delivering and filling an aluminum rod in a seal friction smelting space by continuous feeding and carrying out continuous friction on the space filled aluminum so that the aluminum is heated above the recrystallization temperature to a semi-smelting state; and continuously extruding under continuous feed and extrusion through a molding die in a tail end area of the smelting space. The molding device comprises a rotary friction rotating wheel and a shield, wherein the shield surrounds the periphery of part of rotating wheel and forms the seal friction smelting space; and a conductor extrusion molding die is arranged at the tail end area of the shield. Compared with the prior art, the invention has small extrusion power consumption and high production efficiency and can simultaneously extrude a plurality of soft aluminum conductors; the obtained conductor has good section consistency and stable quality and can realize continuous infinite length extrusion and finish aluminum softening modification and conductor extrusion once; and the molding device has simple structure.

The invention discloses a lightweight traction rod for an urban rail vehicle. The lightweight traction rod for the urban rail vehicle comprises a rod body, two metal mounting rings and two elastic joints. The rod body is formed by fiber reinforced plastic, and the two elastic joints are formed by steel and vulcanization. Mounting holes are formed in two ends of the rod body; the two metal mounting rings are matched with the two mounting holes correspondingly in an integral molding mode; the two elastic joints are in interference fit with the two metal mounting rings correspondingly; a plurality of first hollow portions which are consistent with the mounting holes in the axial direction are arranged at the rod body along the periphery of the mounting holes; and a plurality of second hollow portions consistent with the mounting holes in the axial direction are arranged at the part, between the two mounting holes, of the rod body. The traction rod has the advantages of being high in strength, capable of being produced in batches, and capable of reducing the weight of the vehicle performance load and vehicle operating energy consumption.

The invention discloses a window with an integral invisible screen window for optimizing the matching of the window and the screen window in the prior art. The window is characterized in that on the basis of basic structures of a window side frame, a window sash, window glass and window middle beams, a screen winding pipe, a torsional spring, a piece of screen, a window screen pull handle and a screen hook are added, wherein the screen winding pipe is arranged in the window middle beams; the torsional spring is arranged in the screen winding pipe and is used for winding the screen; the screen is wound on the screen winding pipe in a non-use state; the window screen pull handle is arranged at the tail end of the screen and extends out of the window middle beams; and the screen hook is arranged on the window side frame at the opposite end to the screen winding pipe in a way of being matched with the window screen pull handle. Through the integral design of the screen window and a window main body, the function of the screen window is realized in an invisible mode; the screen window is applicable to various kinds of window types; the cross sections of the window and the screen window are greatly reduced and optimized; the cost is reduced; the screen window and the screen are in integral invisible design, and the integral appearance of building door and window engineering is not influenced; when the window sash is closed, the screen is wound back, the outwards exposed time of the screen is reduced, and the service life is prolonged; when the screen window is not used for a long time, the dismounting is not needed; and the properties such as wind pressure resistance, airtightness and watertightness of the whole window are not influenced.

The invention discloses an etching solution formula, and relates to the field of printed circuit board manufacturing and the field of integrated circuit manufacturing. According to the invention, the etching solution can be provided for reducing the copper thickness and forming the circuit, can improve the poor pinholes in the copper surface and optimize the rectangular circuit section, and meanwhile, improves the etching speed and improves the efficiency. The etching solution is characterized by being composed of sulfuric acid, hydrogen peroxide, an alcohol accelerant and a benzene ring stabilizer, the mass ratio of hydrogen peroxide to sulfuric acid in unit volume is larger than 8: 1, the hydrogen peroxide accounts for 8-30% by mass, the sulfuric acid accounts for 0.3-15% by mass, the alcohol accelerant accounts for 5-20% by mass, and the benzene ring stabilizer accounts for 0-2% by mass.

The invention discloses a novel steel pipe cast-in-place pile. A structural form that a steel pipe subjected to anti-corrosion design is internally provided with a reinforcement cage and is poured with concrete is adopted to form a steel pipe and reinforced concrete combined structure. The invention further discloses a bearing capacity and internal force calculation method of the novel steel pipe cast-in-place pile. The bearing capacity calculation of the novel steel pipe cast-in-place pile foundation can be combined with the calculation method of the steel pipe pile and the cast-in-place pile, the side friction resistance refers to the steel pipe pile, and the end resistance refers to the cast-in-place pile; and under the condition that the steel pipe cast-in-place pile meets the elastic long pile condition, the ratio of the steel pipe to the concrete pile core resisting horizontal force is the same as the bending rigidity ratio of the two materials. The novel steel pipe cast-in-place pile and the bearing capacity and internal force calculation method thereof have the advantages that material waste is reduced, the section of a pile foundation is optimized, compared with a steel casing which is about to achieve the elastic long pile condition and only serves as a temporary facility, the engineering cost can be reduced by about 40% or even 50%, and the horizontal force resistance of the cast-in-place pile under the same pile diameter is improved by about 80%.

Disclosed is the interval channel structure of a regenerative pump, which comprises the vane interval channel of a closed impeller and a pump shell interval channel; an impeller is provided with radial vanes; the space between the two vanes on the same side construct the radial vane interval channel; the vane interval channel includes a vane inlet, a vane inlet root arc, a vane lateral plate, a vane hub plate, a vane outlet and a vane root; a pump shell has an arc-shaped interval channel section; the interval channel section includes the interval channel inner wall top part, the interval channel lateral side inner wall and the interval channel bottom inner wall; the largest width of the interval channel section is close to the inlet of the vane; the interval channel inner wall top part is close to the vane outlet; the inner diameter of the interval channel inner wall top part is more than the largest outer diameter of the impeller; the corner angle of the interval channel inner wall top and the interval channel lateral side inner wall is an obtuse angle; the interval channel lateral side inner wall is extended to be open towards the section of the interval channel with the largest width and smoothly connected with the interval channel bottom inner wall; the interval channel bottom inner wall furls towards the vane inlet; the interval channel bottom inner wall maintains smooth with the vane inlet root arc. The interval channel structure of a regenerative pump can improve the noise problem of the regenerative pump and improve the output flow.

The invention discloses a pipe joint and method for inducing cold flow through axial resultant force of asymmetric annular grooves, and relates to the technical field of pipe joints. The pipe joint comprises a pipe joint body, an inner hole is formed in the pipe joint body, the end of a guide pipe can enter the inner hole, and a plurality of annular grooves are formed in the inner hole; the annular grooves comprise the asymmetric annular grooves, the asymmetric annular grooves comprise groove bottoms, one sides of the groove bottoms are connected with first groove tops through first groove walls, the other sides of the groove bottoms are connected with second groove tops through second groove walls, included angles between the first groove walls and the axial direction of the inner hole and between the second groove walls and the axial direction of the inner hole are different, asymmetric arrangement is formed, axial pushing resultant force is formed for plastic deformation cold flow, cold flow is induced to generate directional flow, so that the radial extrusion load peak value is reduced, the geometric necessary dislocation density in the cold flow can be fully improved, a gradient high-strength nano microstructure is formed, and the connection reliability can be greatly improved. The connecting manufacturability of the pipe joint and the metal guide pipe can be improved, the connecting strength of the pipe joint is greatly improved, and the fatigue life of the pipe joint is greatly prolonged.