CN104763209B - A kind of inflation cable-membrane analysis of foldable expansion - Google Patents

Abstract

The invention discloses a foldable and unfoldable inflatable cable-membrane structure, which is characterized in that it consists of three parts: an inflatable membrane, a cable and a noose, and the noose includes two end loops and two At least one intermediate collar between two end collars, the end collar and the middle collar are respectively fixedly connected with the inner surface of the inflatable membrane, and the middle collar is along the circumferential direction Ear pieces are evenly arranged on the top of the cable, and the two ends of the cable are fixed in the two end collars through the cable anchors with adjusters, and the middle part of the cable passes through the ear pieces of the middle collar , the anchorage is applied on the cable to expand the inflatable membrane to act on the two end collars after the prestress. The inflatable cable-membrane structure provided by the invention absorbs the advantages of the traditional inflatable beam structure, and greatly improves its rigidity, stability and bearing capacity. It can be folded and recycled for multiple times, and has good economic benefits. huge potential.

Description

A foldable and unfoldable inflatable cable-membrane structure

technical field

The invention relates to a cable-membrane structure composed of an inflatable membrane, a cable and a cable sleeve, which is suitable for general permanent and temporary civil buildings and structures.

Background technique

In recent years, engineers are pursuing the lightness of structures, and light structures are also an important link in the development of sustainable building structures. Among them, the inflatable cable-membrane structure is a newly developed light-weight structure. Its main material is a membrane material with excellent performance and light weight. By inflating the membrane material, the effect of supporting the membrane surface by air pressure can be achieved, and the flexibility can be used. Steel cables and rigid support structures tighten the membrane surface to form a spatial structure system with certain rigidity and covering a large span.

The inflatable cable-membrane structure not only has the advantages of strong mobility of the expandable structure and is convenient for transportation and storage, but also has the characteristics of light weight and beautiful appearance of the membrane structure. As a promising foldable structure, it fully embodies the perfect combination of architectural art and science and technology, and is one of the best choices for temporary or emergency buildings, as well as one of the best choices for green and sustainable buildings. one.

The inflatable membrane structure has relatively low load-carrying capacity and low bending stiffness. Under the action of axial pressure, it is easy to wrinkle or buckle as a whole. Therefore, it is necessary to provide a large internal pressure for the inflatable membrane structure to obtain a certain compressive and bending rigidity. Under the action of greater internal pressure, greater tensile stress will also be generated in the inflatable membrane, which requires a high strength of the membrane material. On the basis of inheriting the advantages of the inflatable membrane structure, in order to make up for the lack of mechanical properties of the single inflatable membrane structure, the present invention adds flexible steel cables and cable sleeves to the inflatable membrane structure, thereby improving the stability and bearing capacity of the structure.

Contents of the invention

Purpose of the invention: In order to manufacture a light structure that is easy to fold and unfold, the structure can not only meet the functional requirements of the building, but also has the advantages of convenient design and construction. On the basis of inheriting the advantages of the inflatable membrane structure, it has better Stability and bearing capacity are the preferred structural forms for temporary or emergency structures, and are also an important link in the development of sustainable building structures.

Technical solution: In order to achieve the above purpose, the technical solution adopted in the present invention is: a foldable and unfoldable inflatable cable-membrane structure, characterized in that it consists of three parts: an inflatable membrane, a cable and a noose, and the noose includes Two end collars and at least one middle collar spaced apart between the two end collars, the end collars and the middle collar are respectively fixed to the inner surface of the inflatable membrane connection, the middle collar is evenly provided with lugs along the circumferential direction, the two ends of the cable are fixed in the two end collars through the cable anchors with adjusters, the cable The middle part passes through the lugs of the middle collar, and the prestress that acts on the two end collars after the inflation membrane is opened is applied to the stay cable through an anchor.

Both the end collar and the middle collar are composed of four 1/4 circular connecting rods, and these four circular connecting rods are connected by pins to form a four-bar linkage mechanism, and each connecting rod can be wound around The pin turns.

Each circular connecting rod is provided with an ear piece, the directions of the ears on the collars at both ends are parallel to the surface of the inflatable membrane, and the directions of the ears on the middle collar are perpendicular to the surface of the inflatable membrane. One of the stay cables runs through the lugs of each intermediate collar, one end of the cable anchor is connected to the lug on the end collar, and the other end of the cable anchor is connected to the The cable described above.

The inflatable membrane is composed of two types of curved membranes, wherein the middle part is a cylindrical membrane, and the two ends are sealed by a hemispherical crown membrane, which is connected as a whole; the cylindrical membrane and the spherical crown membrane The sheets are thermally fused, stitched or mechanically connected, and the material of the curved film is a composite material composed of a high-strength fabric substrate and a polymer coating.

The noose and the inflatable film are connected by melting, bonding or sewing.

A foldable and unfoldable inflatable cable-membrane structure of the present invention is composed of three parts: an inflatable membrane, a cable and a noose. Foldable and unfoldable inflatable cable-membrane structure. The noose is the connection between the inflatable membrane and the cable, and it is connected with the membrane surface in a molten state or by bonding or suturing. The cable passes through the ear piece of the noose. , so that it forms a good connection with the inflatable membrane, and the two work together to better transmit the normal force. The cable is arranged on the outer surface of the cylindrical diaphragm in the middle of the inflatable membrane, runs through the cable sleeve, and is connected to the collars at both ends of the inflatable membrane structure through anchors. Considering the torsional stiffness of the cable itself, the process of applying prestress No torsion can occur. Here, the cable anchor with regulator is used. Firstly, the steel cable and the anchor with regulator are made by compression sleeve, and then the lock head is connected to the ear piece of the end collar, and then used before inflating. The special wrench adjusts the regulator on the cable anchor to slowly and evenly apply a certain amount of initial prestress to the cable to increase the overall rigidity of the structure. The cable is a single-strand or multi-strand strip structure made of metal materials, non-metal materials, or composite materials of metal materials and non-metal materials.

Beneficial effects: the cable sleeve arranged along the span direction of the inflatable membrane is formed by connecting four 1/4 circular connecting rods through pin shafts, which can be folded and recycled, and can also provide driving, satisfying the complete folding and unfolding state of the inflatable cable-membrane structure requirements. The noose is well connected with the inflatable membrane, so it can effectively restrain the deformation of the inflatable membrane, act as its stiffener, and improve its local stability. At the same time, the lugs on the connecting rod can fix the cable to prevent the cable from slipping, so that the cable and the inflatable membrane can form a good connection, and the rigidity, overall stability and bearing capacity of the structure can be improved.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the schematic diagram of middle noose;

Fig. 3 is the connection schematic diagram of annular four-linkage;

Figure 4 is a schematic diagram of a cable anchor with a regulator at the end of the cable;

Fig. 5 is a schematic diagram of the inflatable film after being folded.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings.

As shown in FIG. 1 , a foldable and unfoldable inflatable cable-membrane structure and structure is formed by connecting an inflatable membrane 1 and a drag cable 2 through a noose 3 .

The inflatable membrane 1 consists of two parts, the middle part is a cylindrical membrane, and the two ends are sealed by a spherical membrane. These two types of curved surfaces are integrated into a whole by heat fusion, sewing or mechanical connection. The noose 3 as shown in Figure 2 is the connector between the inflatable membrane 1 and the dragline 2, and is connected with the membrane surface in a molten state or by bonding or sewing, as shown in Figure 1, two of which are ends The collars are arranged at both ends of the cylindrical diaphragm in the middle part of the inflatable membrane 1, and the other four are middle collars that are evenly distributed along the span direction of the inflatable membrane; as shown in Figure 3, the noose 3 is composed of four 1/4 circular rings The four circular connecting rods 6 are connected by the pin shaft 4 to form a four-bar linkage mechanism, and each 1/4 circular connecting rod 6 is provided with an ear piece 5, wherein the two ends The directions of the lugs on the upper collars are all parallel to the surface of the inflatable membrane, and the directions of the lugs on the middle collar are all perpendicular to the surface of the inflatable membrane. A cable 2 runs through the lugs of each middle collar, and the cable noose lifts the cable. A good fixing effect is achieved, so that it forms a good connection with the inflatable membrane, and the two work together. As shown in Figure 1, the four cables 2 are evenly arranged on the outer surface of the cylindrical diaphragm in the middle part of the inflatable membrane 1, run through the ear pieces 5 on the noose, and are connected to the loops at both ends of the inflatable membrane structure through anchors , considering the torsional rigidity of the cable itself, no torsion can occur during the prestressing process. Here, the cable anchor 7 with a regulator is used as shown in Figure 4, and the steel cable and the anchor with a regulator are pressed first. After production, the lock head is connected to the ear piece of the end collar. Before inflating, use a special wrench to adjust the regulator on the cable anchor to slowly and evenly apply a certain amount of initial prestress to the cable. The regulator consists of The adjustment sleeve 71 in the middle is combined with the screw rod 72 with positive and negative threads on both sides and the lock head 73 at the end, wherein the lock head 73 is connected with the lug of the end collar through a pin shaft or a bolt, and can be adjusted by rotation. The sleeve changes the length of the cable, thereby realizing the application of prestress; the cable 2 is a single-strand or multi-strand strip made of a metal material, a non-metal material, or a composite material of a metal material and a non-metal material shape structure. Fig. 5 is a folding diagram of the noose 3 after the inflatable membrane 1 is deflated. Because the four connecting rods 6 are rotatable at the joints of the pin shafts, the requirement for the inflatable membrane to be folded is met, space is saved, and storage and transportation are more convenient.

It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (4)

1. a kind of inflation cable-membrane analysis of foldable expansion, it is characterised in that：It is made up of aerated film, drag-line and three part of noose, Described noose includes at least one intermediate collar being arranged between two end collars at two end collars and interval, institute The end collar stated and described intermediate collar are fixedly connected with described inflation film outer surface respectively, in described intermediate collar Along the circumferential direction go up, the two ends of the drag-line are fixed on described two by the cable anchorage with actuator In the individual end collar, the middle part of drag-line applies to make institute by anchorage on described drag-line through the auricle of the intermediate collar State the prestressing force acted on after aerated film is opened on described two end collars；The described end collar and intermediate collar are by four Individual 1/4 annular connecting rod composition, this four annular connecting rods are by bearing pin connection one quadric chain of composition, each connecting rod Rotate around bearing pin.

2. inflation cable-membrane analysis according to claim 1, it is characterised in that：It is respectively provided with each described annular connecting rod There is an auricle, the auricle direction on the collar of both ends is hung down each parallel to aerated film surface, the auricle direction in intermediate collar Directly in aerated film surface, through the drag-line described in, described cable anchorage one on the auricle of each described intermediate collar End is connected with the auricle on the end collar, in the described drag-line of the other end connection of cable anchorage.

3. inflation cable-membrane analysis according to claim 1, it is characterised in that：Described aerated film is by two kinds of song What facial film was constituted, wherein, mid portion is said cylindrical membranes, and two ends are connected to become an entirety by half spherical diaphragm sealing； With heat fusion, suture or mechanical connection between said cylindrical membranes and half spherical diaphragm, the material of the curved surface film is by high-strength The composite that the fabric substrate of degree and polymer coating are constituted.

4. inflation cable-membrane analysis according to claim 1, it is characterised in that：With molten between described noose and aerated film Melt, bonding or suture way connect.