Warp-knitted multi-axial framework cloth

Abstract

The warp knitting multi-axial framework cloth comprises knitting threads (1) and warp threads (2), the knitting threads (1) are composed of upper-layer knitting threads (1.1) and lower-layer knitting threads (1.2), the upper-layer knitting threads (1.1) and the lower-layer knitting threads (1.2) form a latticed structure, the warp threads (2) are bound at nodes of the latticed structure formed by the knitting threads (1), each strand of warp threads (2) comprises first warp threads (2.1) and second warp threads (2.2), and the first warp threads (2.1) and the second warp threads (2.2) are arranged in a staggered mode. The first warps (2.1) and the second warps (2.2) penetrate through adjacent nodes in an up-down staggered mode, and the first warps (2.1) and the second warps (2.2) penetrate through the two sides of the nodes in an interpenetrating mode.

Description

Technical Field

[0001] This utility model relates to a skeleton fabric, and more particularly to a multi-axial skeleton plate made by warp knitting process, which is widely used in rubber fabric as a skeleton layer and belongs to the field of rubber technology. Background Technology

[0002] Multi-Axial Warp Knitted Fabric (MAWK) is a high-performance fiber-reinforced material. It is particularly useful in the sealing applications of the petrochemical industry, where sealing materials must maintain long-term stability and reliability under extreme conditions such as high temperature, high pressure, and highly corrosive media. By wrapping the multi-axial warp knitted fabric with special rubber, the rubber achieves temperature and corrosion resistance, while the multi-axial warp knitted fabric provides compression and tear resistance. For example, our company's Chinese patent 2016101062856, "Matching Reinforced Fabric and Sealing Tape Made from This Fabric," is relevant.

[0003] The multi-axial skeleton fabric with a star-shaped structure exhibits extremely high tear resistance in all eight directions due to the weaving method used in both the warp and weft directions and the fabric layers. However, when used as a sealing material in the petroleum industry, such as in gas or oil storage tanks as a seal between the floating roof and the tank body, the rubber sheet needs to move up and down with the floating roof, especially when the oil volume reaches its limit or oil and gas evaporates. This requires the rubber sheet to have a certain degree of elasticity to allow it to stretch and quickly rebound to its original position when external factors disappear. These are all things that the star-shaped skeleton fabric cannot achieve. The tensile and tear resistance of the star-shaped skeleton fabric becomes a constraint in this application, easily leading to sealing failure due to its inability to deform, and even causing cracks in the rubber sheet, severely affecting its service life. Therefore, there is an urgent need for a new warp-knitted multi-axial skeleton fabric that can solve the above problems. Utility Model Content

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a warp-knitted multiaxial skeleton fabric that has excellent elasticity and can quickly rebound and reset when the external pressure is removed.

[0005] The purpose of this utility model is achieved as follows:

[0006] A warp-knitted multiaxial skeleton fabric includes knitting yarns and warp yarns. The knitting yarns consist of an upper layer of knitting yarns and a lower layer of knitting yarns, which form a grid structure. The warp yarns are tied at the nodes of the grid structure formed by the knitting yarns. Each warp yarn includes warp yarn one and warp yarn two. Warp yarn one and warp yarn two cross each other through adjacent nodes, and warp yarn one and warp yarn two interweave with each other on both sides of the node.

[0007] Preferably, the upper layer braided wires are arranged in multiple parallel lines, and the spacing between adjacent upper layer braided wires is equal. The lower layer braided wires are arranged in multiple parallel lines, and the spacing between adjacent lower layer braided wires is equal, and this spacing is equal to the spacing between adjacent upper layer braided wires. The upper layer braided wires are located above the lower layer braided wires.

[0008] Preferably, the upper layer of braided yarn and the lower layer of braided yarn intersect at a 90° angle or a certain angle.

[0009] Preferably, the binding structure of meridian 1 and meridian 2 at the node is as follows: meridian 1 is located below the node and above the next node. Meridian 2 passes through meridian 1 from below the meridian, crosses the node above the node, and then passes through meridian 1 again from above the meridian, so that meridian 2 is located below the next node. Thus, meridian 1 and meridian 2 are interwoven vertically at adjacent nodes.

[0010] Preferably, at each of the four nodes of each grid, which is composed of upper and lower braided threads, two adjacent warp threads are used to bind two grid nodes located on opposite sides.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] This invention uses upper and lower braided threads to form a three-dimensional spatial structure in which the upper and lower sides are not woven together. Then, two weft threads (i.e., warp thread one and warp thread two) are tied at the nodes of the three-dimensional space, and the tying is done in an alternating manner. This achieves less constraint and allows for stretching and extension in the dimensional direction. Furthermore, due to the presence of non-elastic (or slightly elastic) warp threads, when external forces causing dimensional deformation disappear, the designed skeleton fabric can quickly return to its original position under the action of the warp threads. Therefore, it can be safely and reliably applied in petrochemical and other industries where a certain degree of elastic deformation is required. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of a warp-knitted multiaxial skeleton fabric according to this utility model.

[0014] Figure 2 This is a partially enlarged view of a warp-knitted multiaxial skeleton fabric according to this utility model.

[0015] in:

[0016] Braided yarn 1, upper braided yarn 1.1, lower braided yarn 1.2;

[0017] Parallel 2, Meridian 1 2.1, Meridian 2 2.2. Detailed Implementation

[0018] See Figures 1-2 This utility model relates to a warp-knitted multiaxial skeleton fabric, comprising knitting yarn 1 and warp yarn 2. The knitting yarn 1 includes upper knitting yarn 1.1 and lower knitting yarn 1.2. The upper knitting yarn 1.1 is arranged in multiple parallel layers, and the spacing between adjacent upper knitting yarn 1.1 is equal. Similarly, the lower knitting yarn 1.2 is arranged in multiple parallel layers, and the spacing between adjacent lower knitting yarn 1.2 is equal, and this spacing is equal to the spacing between adjacent upper knitting yarn 1.1. The lower knitting yarn 1.2 is located in the lower layer, and the upper knitting yarn 1.1 is located in the upper layer. The upper knitting yarn 1.1 is located on the lower knitting yarn 1.2 and is close to each other. The upper knitting yarn 1.1 and the lower knitting yarn 1.2 intersect at a 90° angle or a certain angle and are staggered.

[0019] Each warp strand 2 also contains warp 1 2.1 and warp 2 2.2, that is, one warp 1 2.1 and one warp 2.2 constitute one warp strand. Multiple warp strands are parallel to each other and equally spaced. At the nodes where the upper layer braided yarn 1.1 and the lower layer braided yarn 1.2 intersect in an alternating manner, they are bound by warp strands. That is, warp 1 2.1 is located below the node and above the next node. Warp 2 2.2 passes through warp 1 2.1 from below and then passes over the node from above. Then, it passes through warp 1 2.1 from above and then passes under warp 2.1 again, so that warp 2.2 is below warp 2.1. Subsequently, warp 2.1 is located below the next node. Thus, warp 1 2.1 and warp 2 2.2 are interwoven vertically at adjacent nodes, thereby binding each node.

[0020] Preferably, in each of the four nodes of the grid formed by the upper braided yarn 1.1 and the lower braided yarn 1.2, two adjacent warp yarns 2 are used to tie two grid nodes located on the diagonal, and the other two nodes do not need to be tied. This allows the woven warp-knitted multiaxial skeleton fabric to have the ability to stretch and extend in the weft direction. At the same time, due to the presence of the warp yarns 2, when the external force causing the warp-knitted multiaxial skeleton fabric disappears, the warp-knitted multiaxial skeleton fabric can quickly return to its original position under the tension of the warp yarns 2.

[0021] In use, a rubber layer is laminated onto the upper and lower surfaces of the warp-knitted multi-axial skeleton fabric of this invention to form a rubber sheet. When applied to industries such as petrochemicals, the rubber layer provides corrosion resistance, while the woven layers and warp threads of the warp-knitted multi-axial skeleton fabric provide tear resistance. The double-layered woven layers with staggered upper and lower sections, along with the warp threads that interlock to bind the woven layers, give the rubber sheet a certain degree of extensibility and deformation in the weft direction. When subjected to external influences, it can better match the deformation of the sealing structure, thus ensuring a sealing effect. Simultaneously, under the tension of the warp threads, when the external factors disappear, the warp threads can pull the outwardly deformed woven layers, and combined with the inherent elasticity of the rubber sheet, the rubber sheet can quickly return to its original position, thus ensuring a sealing effect.

[0022] Additionally, it should be noted that the above-described specific implementation is merely an optimized solution of this patent, and any modifications or improvements made by those skilled in the art based on the above concept are within the scope of protection of this patent.

Claims

1. A warp-knitted multi-axial skeletal fabric comprising a knitted thread (1) and a warp thread (2), characterized in that: The braided thread (1) consists of an upper braided thread (1.1) and a lower braided thread (1.2), and the upper braided thread (1.1) and the lower braided thread (1.2) form a grid structure. The warp threads (2) are tied at the nodes of the grid structure formed by the braided thread (1). Each warp thread (2) includes a first warp thread (2.1) and a second warp thread (2.2). The first warp thread (2.1) and the second warp thread (2.2) cross each other through adjacent nodes, and the first warp thread (2.1) and the second warp thread (2.2) interweave on both sides of the node.

2. The warp-knitted multi-axial skeletal fabric of claim 1 wherein: The upper braided wires (1.1) are arranged in multiple parallel lines, and the spacing between adjacent upper braided wires (1.1) is equal. The lower braided wires (1.2) are arranged in multiple parallel lines, and the spacing between adjacent lower braided wires (1.2) is equal, and this spacing is equal to the spacing between adjacent upper braided wires (1.1). The upper braided wires (1.1) are located above the lower braided wires (1.2).

3. The warp-knitted multi-axial skeletal fabric of claim 1 wherein: The upper layer braided yarn (1.1) and the lower layer braided yarn (1.2) intersect at a 90° angle or a certain angle.

4. The warp-knitted multi-axial skeletal fabric of claim 1 wherein: The binding structure of meridian 1 (2.1) and meridian 2 (2.2) at the node is as follows: meridian 1 (2.1) is located below the node and above the next node. Meridian 2 (2.2) passes through meridian 1 (2.1) from below and then passes over the node from above. After passing through meridian 1 (2.1) from above again, meridian 2 (2.2) is located below the next node. Thus, meridian 1 (2.1) and meridian 2 (2.2) interweave vertically at adjacent nodes.

5. The warp-knitted multi-axial skeletal fabric of claim 1 wherein: In each grid consisting of upper braided thread (1.1) and lower braided thread (1.2), two adjacent warp threads (2) are used to bind two grid nodes located on the diagonal.

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