174 results about "Tensile structure" patented technology

The invention relates to a circular awning with a cable dome and a spatial steel truss being combined and a construction method of the circular awning. The circular awning comprises an awning roof and a main body; the circular awning is an approximately spherical segment surface; the awning roof is of a cable dome structure; the main body is of a spatial steel truss structure; the bottom end of the cable dome is fixedly connected with the top end of the spatial steel truss structure. The spatial steel truss structure comprises at least one layer of weft curved beam which is a polygonal spatial steel truss. The spatial steel truss structure comprises at least two layers of weft curved beams and radial curved pillars; the radial curved pillars are connected with each layer of weft curved beams, and every two adjacent radial curved pillars are connected through weft pull rods which are arranged at intervals according to fixed latitudes. The circular awning disclosed by the invention combines tensile and rigid structures, integrates inward tension of the tensile structure and outward thrust of the spatial steel truss structure, and realizes self-balance of inside and outside stresses; the stress of an arched steel structure is reduced, the integral structural stability is better, and meanwhile, the horizontal thrust of the lower part of the steel truss structure and a support is reduced, the maintenance cost of late-stage anticorrosion is reduced, and the construction efficiency is high.

The invention discloses a form-finding method of a cable-strut tensile structure, belonging to the field of building design and structure design of a space structure. The method provided in the invention comprises the following steps: setting a topological relation of the cable-strut tensile structure and rendering constraint conditions thereof and lengths of struts; determining an objective function in form-finding analysis of the cable-strut tensile structure; setting weight coefficients of the lengths of each cable and strut as well as weight coefficients of each boundary condition, and rendering an initial step length in a gradient optimization method; and calculating a gradient vector of a coordinate variable of each node in XK. The method provided in the present invention is based on viewpoint of energy, constraints such as boundary conditions of the cable-strut tensile structure and the like are written into the performance function of the gradient optimization method, thereby a form-finding problem of the tensile structure having the constraint conditions being easily solved. Too many constraint conditions and geometric constraints are added in traditional form-finding methods, while, few constraint conditions exist in the method provided in the present invention, therefore, a large number of irregular systems can be found.

In order to prevent degradation of appearance, prevent a decrease in flexibility, and improve non-elasticity in a non-stretchable region in an elastic film stretchable structure, the invention is characterized by having an elastic film stretchable structure (20X) formed by stacking an elastic film (30) between a first sheet layer (20A) and a second sheet layer (20B), wherein a region having the elastic film stretchable structure (20X) includes a non-stretchable region (70) and a stretchable region (80) provided at least at one side of the non-stretchable region (70) in a stretching and contracting direction, the stretchable region (80) being stretchable in the stretching and contracting direction, the first sheet layer (20A) and the second sheet layer (20B) are joined via through holes (31) penetrating the elastic film (30) at the large number of sheet bond portions (40) arranged at intervals, and the non-stretchable region (70) does not have a section in which the elastic film (30) linearly continues along the stretching and contracting direction, due to presence of the through holes (31), even though the elastic film (30) continues in the stretching and contracting direction.

The invention discloses a method for determining initial prestress distribution of a cable-pole tensile structure, belonging to the field of architectural design and structural design of space structure. The method comprises the following steps of: a first step of giving the geometry and topology relation of the cable-pole tensile structure and calculating the balanced matrix of the cable-pole tensile structure; a second step of calculating the self-stress mode number of the cable-pole tensile structure; a third step of determining a target function in the optimizing method; a fourth step of randomly generating c groups of self-stress mode combination coefficients and thereby obtaining c initial prestress distributions, using the gradient method to optimize and thereby obtaining c groups of final initial prestress distributions, then comparing stiffness matrix quadratic form minimum characteristic roots corresponding to the c groups of final distributions of initial prestress and taking the data with the largest stiffness matrix quadratic form minimum characteristic root as the final result, wherein the value of c is integers greater than 100; and a fifth step of judging whether the cable-pole tensile structure with the selected initial prestress distribution satisfies the stability condition.

The invention discloses a parallel workbench for realizing space three-translation high-frequency excitation in which a flexible kinematic pair is combined with a parallel mechanism, wherein a static platform is composed of three panels orthogonal with each other; a single-dimensional exciter is vertically and fixedly arranged on each panel; three parallel branch chains are connected between a movable platform and the single-dimensional exciters; the tail ends of three branch chains in orthogonal distribution are connected to the corresponding single-dimensional exciters through movable pairs, respectively; and the top ends of the three branch chains in orthogonal distribution are all vertically connected to the movable platform through rotating pairs; the single branch chain is formed by orderly connecting the movable pair 3A, 4R structure 3B, the rotating pair 3c and the rotating pair 3D in series according to the vertical and parallel position relations of the axes of the movable pairs; and the movable pair is a continuous integrated body and is provided with a surface contact compression-resisting structure and a surface contact tensile structure. The parallel workbench is good in stress performance, compact in structure and relatively high in structural rigidity.

The invention relates to a wine box structure comprising a box cover and a box body. The box body comprises a plurality of side boards and a bottom board connected with the bottom ends of the side boards. The side boards are separate. A light-emitting unit is arranged on the box cover. The side boards are provided with hollowed-out patterns. The box cover is connected with the side boards through a tension structure. After the tension structure is closed, the side boards enclose an accommodating space, and a top hole of the accommodating space is covered with the box cover. After the tension structure is released, the side boards are spread out; the box cover is fixed to a certain height under traction of the tension structure. The wine box structure provides better candle-lit dinner atmosphere by allowing light to project the hollowed-out patterns to a desk top. The openable structure and the hollowed-out patterns of the wine box provide better display effect in sales. In application to candle-lit dinners, the wine box can even be used as a desk lamp decoration placed at home. In addition, the hollowed-out patterns can be designed according to different market demands.

The invention provides a punching die with an auxiliary punching mechanism and belongs to the field of dies. The punching die comprises an upper die base and a lower die base, wherein the upper die base and the lower die base are connected through a guide pillar, an upper male die body is connected to the bottom of the upper die base, and a round tube accommodating part is arranged on the lower die base in the longitudinal direction; the auxiliary punching mechanism is arranged outside the upper male die body and comprises a positioning block, the bottom surface of the positioning block is of a tensile structure, the contour line of the bottom surface of the interior of the longitudinal section of the positioning block is an arc, a vertical through hole is formed in the positioning block, and the upper male die body penetrates through the through hole; the positioning block is connected with the upper die base through an elastic mechanism, and the positioning block can move in the vertical direction through the elastic mechanism. By the adoption of the punching die, a round tube is more stable during punching, the upper male die body operates more smoothly, failures, such as bending, of the upper male die body are avoided, and the operation stability of the punching die is improved.

The invention relates to a precast concrete inside heat insulation wall body, which can effectively separate a cold bridge from a thermal bridge and has a lower heat transfer coefficient. The precast concrete inside heat insulation wall body is characterized in that: the two ends of a plurality of spaced heat insulation material connecting pieces of which the two ends are extended into inside and outside thin-shell wall plates respectively pass through reinforcing steel bars of the inside and outside wall plates and/or are interspersed with anti-drawing short sticks to form a tensile structure; the tensile structure, a compression-resistant structure and a shearing-resistant structure are respectively pre-buried in the four corners of the wall body at least; and/or the periphery of the wall body has an overall frame structure. An overall box type structure is formed, which not only effectively reduces a cold/thermal bridge phenomenon, makes the heat insulation wall body have the lower heat transfer coefficient, reduces a wall body heat transfer coefficient within 0.4 W/m<2>.K, but also remarkably improves the overall structural strength of a hollow heat insulation wall body, improves the shearing resistance of a wall plate and the connection strength with a building structure, and has various mechanical properties which completely meet the requirements on the outside wall of a building. The connecting pieces adopt hollow structures; and metal connecting pieces can be arranged and fixed in holes and are used as for fixing objects on a wall surface and used as scaffold supporting points so as to increase connection points between the wall body and the building structure.

The invention discloses a jacketed type corrugated pipe compensator which comprises an inner compensator body, an outer compensator body, ring plates and a lug plate, wherein the inner compensator body and the outer compensator body are coaxially sleeved with each other, and the inner compensator body and the outer compensator body are positioned and connected through the ring plates and the lug plate; the inner compensator body comprises an inner corrugated pipe and an inner pipe opening, the two ends of an inner middle connecting pipe are coaxially and sequentially connected with the inner corrugated pipe and the inner pipe opening in a sealing mode respectively, and the inner wall of the inner corrugated pipe is fixedly connected with a flow guide pipe in the medium flow direction; the outer compensator body comprises an outer corrugated pipe and an outer pipe opening, and the two ends of an outer middle connecting pipe are coaxially and sequentially connected with the outer corrugated pipe and the outer pipe opening in a sealing mode respectively; a pull rod penetrates through through holes uniformly distributed in the end faces of the ring plates and the end face of the lug plate, the two exposed ends of the pull rod are locked by means of nuts, and a direct movement tensile structure that the inner compensator body and the outer compensator body are oriented through the through holes of the lug plate is formed. The corrugated pipe compensator is of a jacketed type structure, on the basis that axial compensation is not influenced, the aim of carrying out heat preservation on or heating medium steam in the inner compensator body is achieved by means of heat provided by heat media during circulation inside a jacket, and it is guaranteed that production is conducted in order.

The invention relates to a novel structure of a micro-fluidic chip used for DNA separation, pertaining to the field of micro-fluidic chip design for separating DNA or large molecule, etc. The structure comprises a sampling inlet tank (1), an entrance channel (2), a hyperbola micro-shrinkage structure (4), a slit channel (5), a sudden enlarging mouth (6), an outlet channel (7) and a waste liquor (8), which are communicated with each other in sequence; a cylinder-shaped barrier (3) is positioned inside the entrance channel (2) in front of the hyperbola micro-shrinkage structure (4); the cylinder-shaped barrier (3) is positioned on a central line of a micro-fluidic channel. By adopting the cylinder-shaped barrier as a pre-tensile structure, the radius of the cylinder-shaped barrier and the distance between the circle center and the hyperbola micro-shrinkage structure are adjustable according to the real requirements, so as to realize the tensile and the separation of a DNA-chain with different lengths and different original structures. The invention can be driven by flow field and electric field, and the object of the tensile and the separation can be spread to any polymer with a certain universal applicability.

The invention discloses a method for analyzing the length error sensibility of a rod member with a cable-strut tensile structure. The method disclosed by the invention comprises the following steps: establishing a mathematical model of the length error of the rod member; deducing a basic relation between the length error of the rod member and the pretension deviation; calculating evaluation parameters of the length error sensibility of the rod member. The method disclosed by the invention can be used for effectively judging and evaluating the length error sensibility of various members of the cable-strut pretension structure and providing a theoretical guidance for control over the mounting precision in the construction of the similar structures, for instance, the length of a length error sensitive member, for example, a ring cable in a calculation example needs to be accurately controlled.

The invention relates to a decorative material and a manufacturing process thereof. The decorative material is applied to the field of buildings, furniture and the like, and the invention particularly relates to a pre-stress composite glass plate which takes a glass material as a surface layer, and a manufacturing process thereof. The pre-stress composite glass plate is formed by compounding a glass thin-plate layer (1) and a pre-stress layer (2) by a locking force structure (3); the glass thin-plate layer (1) is a thin-plate layer which is made of fragile glass materials including a glass plate, a toughened glass plate, a micro-crystalline glass plate and the like; the original state of the thin-sheet layer is in a sheet shape and the thin-sheet layer is formed by arraying one or more pieces; the pre-stress layer (2) is a sheet-shaped tensile structure layer; and the structure layer and the glass thin-plate layer (1) are placed in parallel. The manufacturing process of the pre-stress composite glass plate can adopt a thermal solidification method, comprising the following steps of: checking the appearance and the size; washing the material; drying; combining the sheet and heating; cooling; checking a product; and packaging.

Structural members having enhanced load bearing capacity per unit mass include a skeleton structure formed from strips of material. Notches may be placed on the strips and a weave of tensile material placed in the notches and woven around the skeleton structure. At least one pair of structural members can be jointed together to provide very strong joints due to weave patterns of tensile material, such as Kevlar, that distributes stress throughout the structure, preventing stress from concentrating in one area. Methods of manufacturing such structural members include molding material into skeletons of desired cross section using a matrix of molding segments. Total catastrophic failures in composite materials are substantially avoided and the strength to weight ratio of structures can be increased.

The invention relates to the technical field of non-woven fabric manufacturing equipment and particularly relates to double-die-head compound interlaced two-component spunbond spunlace non-woven fabric production equipment and a production process. The equipment comprises a lapping machine, wherein a tube type stretching mechanism and a long-slit stretching mechanism are arranged on the lapping machine; the tube type stretching mechanism comprises a melt spinning small-component compound die head, a unidirectional lateral blowing device, a drafting head, a stainless steel drafting tube, a sway machine and a guiding device in sequence from top to bottom; the long-slit stretching mechanism comprises a melt spinning big-component compound die head, a bi-directional lateral blowing device and a long-slit negative pressure stretching device. A product prepared by the production equipment and the production process has the advantages that the uniformity and the strength of a cloth cover are enhanced, the fiber strength is 100g/m<2> as fixed weight, the longitudinal breaking strength is 380N/50mm, the horizontal breaking strength is 260N/50mm, the longitudinal stretching rate is 78%, the longitudinal tearing strength is 60N, the horizontal tearing strength is 40N, and the CV (coefficient of variation) value of the uniformity of the product is 3-5%.

The invention discloses a stretching structure with good stability for producing uniaxially-stretched polyimide film, relates to the technical field of polyimide film production, and aims at solving the problems that an existing stretching structure is poor in stretching uniformity and low in overall flexibility. A metal roller, transition rollers and a limiting roller are installed in a stretching box, the limiting roller is located at the lower end of the metal roller, the transition rollers are located on the two sides of the metal roller, a motor is installed at one end of the metal roller, the metal roller is connected with the motor through a coupler, and the metal roller is connected with a stretching box through a bearing. Polyimide films are arranged outside the metal roller and the transition rollers correspondingly, a tensioning roller is installed on one side of the exterior of the stretching box, a rubber layer is arranged outside the limiting roller, the limiting roller is connected with the rubber layer in a glued manner, and an electromagnetic heating ring is arranged outside the stretching box. A heat insulation layer is arranged outside the electromagnetic heatingring.

The preparation process comprises the following steps that the film is sequentially composed of an upper surface layer, an upper secondary surface layer, a core layer, a lower secondary surface layer and a lower surface layer, the core layer is a main extrusion layer, and the raw materials comprise, by weight, 97%-99% of homopolymerized polyethylene and 1%-3% of a slipping agent; the upper secondary surface layer and the lower secondary surface layer are prepared from the following raw materials in percentage by weight: 100% of homopolymerized polyethylene; the upper surface layer and the lower surface layer are heat-sealing layers, and each raw material comprises the following components in percentage by weight: 93-97% of homopolymerized polyethylene and 3-7% of an anti-sticking agent. By rotating a first threaded rod, an internal thread control ring can be driven to ascend or descend under the action of threads, so that two groups of mounting frames are driven to be automatically close to or far away from each other, the distance between two groups of guide rollers is controlled, and the tightness of a film in a transverse stretching bin is adjusted; the transverse stretching effect of the thin film can be fully guaranteed by matching with the transverse stretching structure for the thin film.

The invention relates to a determination method of a support joint allowable error of a cable-rod tensile structure. Firstly a support joint error model of the cable-rod tensile structure following definite distribution in radial, circular and vertical directions is constructed based on the stochastic theory; error sensitivity of the structure for positional deviations in the radial, circular andvertical directions of the support joint is reviewed by use of a Probabilistic Design System (PDS) module in the ANSYS software and the Latin Hypercube Sampling (LHS); on the basis, the concept of searching error allowable value and the specific search method are further put forward under the conditions that the reliability index is not less than 1.5 and the cable-rod internal force deviation is not more than 10% in the serviceability limited state and the serviceability limited state is satisfied in accordance with Unified Standard for Reliability Design of Building Structures and Technical Specification for Prestressed Steel Structures. The method is of strong theoretical foundation, capable of accurately determining the support joint allowable error of the cable-rod tensile structure and generally applicable to the support joint error calculation field of the cable-rod tensile structure.