A high-strength and lightweight thermal insulation structure based on cattail leaf bionics

Abstract

The present invention mainly relates to a high-strength, lightweight, thermal insulation structure based on cattail leaf bionics, including an outer panel, an inner support sheet, and a gap filling layer. The outer panel includes an arc panel and a plane panel. The two sides of the arc panel are respectively fixed to the two sides of the plane panel, and a cavity is formed between the arc panel and the plane panel. The inner support sheet is arranged in the cavity, and the inner support sheet is fixed to the arc panel and the plane panel. An inner gap is provided on the inner support sheet, and the inner gap is filled with a gap filling layer. The present invention is based on the cattail leaf bionic structure, has both high strength and thermal insulation, has a simple structure, is easy to process, and can be assembled with the bionic structure as a micro-unit part according to actual applications (walls, wind turbine blades, shoe soles, etc.).

Description

Technical Field

[0001] The present invention mainly relates to the technical fields of building wall thermal insulation and mechanical structure, and specifically relates to a high-strength and lightweight thermal insulation structure based on cattail leaf bionics. Background Art

[0002] In structural design, such as building walls and mechanical blades, hollow structures are often designed to save material. However, due to the large span between the two surfaces, insufficient strength is often achieved. Therefore, appropriate fins are often added between the two surfaces for support and overall strength. Furthermore, in some injection molded parts, fins not only enhance product strength and overcome deformation caused by uneven stress, but also conserve material consumption, reduce the weight of the finished product, and lower costs.

[0003] Generally speaking, it is difficult to have both high structural strength and thermal insulation (or sound insulation) at the same time, because high structural strength requires adding as many ribs as possible between the two surfaces, while conversely, thermal insulation (or sound insulation) requires filling as much still air as possible between the two surfaces.

[0004] Cattail is a perennial aquatic or marsh plant with very tough leaves that, even when withered, can still withstand strong winds. Cattail leaves have a wide range of uses. After drying, they can be used to weave cattail fans, cushions, baskets, mats, and other items. They are durable and have good thermal insulation properties. Observation of cattail leaves reveals that the portion near the root is approximately semicircular, while the portion near the tip is nearly flat and very thin. Inside, rectangular cavities are distributed in rows, each of which is isolated from the other and arranged in a regular pattern. These cavities are filled with flocs. This unique structure of cattail leaves is one of the key reasons for their high strength and thermal insulation properties. Summary of the Invention

[0005] The purpose of the present invention is to address the above existing problems and provide a high-strength, lightweight, thermal insulation structure based on cattail leaf bionics through research on the cattail leaf structure.

[0006] The object of the present invention is achieved by providing a high-strength, lightweight thermal insulation structure based on cattail leaf biomimetic, comprising an exterior panel, an interior support sheet, and a gap filling layer, characterized in that:

[0007] The outer panel includes an arc panel and a flat panel. The two sides of the arc panel are respectively fixed to the two sides of the flat panel, and a cavity is formed between the arc panel and the flat panel. The internal support sheet is arranged in the cavity, and the internal support sheet is fixed to the arc panel and the flat panel. An internal gap is provided on the internal support sheet, and the internal gap is filled with a gap filling layer.

[0008] The internal support sheet includes crisscross X-direction ribs, Y-direction ribs, and Z-direction ribs;

[0009] The thickness of the X-direction fins is uniform or decreases from the middle to both sides, and the spacing between adjacent X-direction fins is uniform or decreases from the middle to both sides, and the decreasing rule is linear decreasing or normal distribution decreasing;

[0010] The Y-direction fins are arranged between adjacent X-direction fins, are located at the center height in the Y direction, and have uniform thickness;

[0011] The spacing between adjacent Z-direction fins is the same in the Z direction, and the thickness of the Z-direction fins is uniform; the spacing between adjacent Z-direction fins decreases from the middle to both sides in the X direction, and the decreasing rule is linear decreasing or normal distribution decreasing.

[0012] The internal gap is filled with thermal insulation material, sound insulation material or fireproof material to form a gap filling layer.

[0013] The internal space is a rectangular cavity.

[0014] The curvature of the arc panel varies from 0° to 180°;

[0015] The curvature of the arc panel gradually decreases along the Z direction.

[0016] The arc panel is twisted along the Z direction, and the twisting degree ranges from 0° to 90°.

[0017] The present invention has a reasonable structure. Through the present invention, a high-strength, lightweight thermal insulation structure based on cattail leaf bionics is provided, which consists of three parts: an outer surface panel, an inner support sheet, and a gap filling layer. The outer surface panel is composed of an arc panel and a flat panel; the interior is composed of a number of rectangular cavities formed by criss-crossing ribs (X-direction ribs, Y-direction ribs, and Z-direction ribs); and the cavities are filled with a gap filling layer. According to actual application requirements, the arc curvature of the outer surface panel can vary from 0° to 180°. In order to enhance the structural strength and toughness, the arc curvature of the outer surface panel can be gradually reduced along the Z direction, and the outer surface can be twisted along the Z direction, with the degree of twisting ranging from 0° to 90° ( Figure 1 ). The internal support plates of the structure are composed of ribs in the X, Y and Z directions, wherein the thickness of the ribs in the X direction is uniform or decreases from the middle to both sides, and the spacing of the ribs in the X direction decreases from the middle to both sides; the spacing of the ribs in the Z direction is uniform in the Z direction, and the rib thickness is uniform. The spacing of the ribs in the Z direction decreases from the middle to both sides in the X direction. The ribs in the Y direction are arranged between adjacent X-direction ribs, located in the center in the Y direction, and have uniform thickness. The internal gaps formed by the ribs are filled with thermal insulation materials, sound insulation materials or fireproof materials. The above-mentioned bionic structure can be used as a micro-unit part, and multiple micro-unit parts can be assembled to meet actual application needs.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The invention, based on a bionic structure inspired by cattail leaves, combines high strength and thermal insulation, can be applied to connect any two surfaces, has a simple structure, and is easy to process. The structure is highly scalable and applicable to fields such as architecture and mechanical structure design. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 This is a structural diagram of another direction of the present invention.

[0022] Figure 3 This is a structural diagram of another direction of the present invention.

[0023] In the figure: 1 arc panel, 2 flat panel, 3 X-direction ribs, 4 Y-direction ribs, 5 internal gaps, 6 Z-direction ribs. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and accompanying descriptions.

[0025] A high-strength, lightweight thermal insulation structure based on cattail leaf bionics includes an outer panel, an internal support sheet, and a gap filling layer. The outer panel includes an arc panel 1 and a flat panel 2. The two sides of the arc panel 1 are respectively fixed to the two sides of the flat panel 2, and a cavity is formed between the arc panel 1 and the flat panel 2; the internal support sheet is arranged in the cavity, and the internal support sheet is fixed to the arc panel 1 and the flat panel 2. An internal gap 5 is provided on the internal support sheet, and the internal gap 5 is filled with a gap filling layer.

[0026] The internal support plate includes X-direction ribs 3, Y-direction ribs 4, and Z-direction ribs 6 that are crisscrossed. The thickness of the X-direction ribs 3 is uniform or decreases from the middle to the sides. The spacing between adjacent X-direction ribs 3 is uniform or decreases from the middle to the sides, and the decreasing pattern is linear decreasing or normally distributed decreasing. The Y-direction ribs 4 are arranged between adjacent X-direction ribs 3, located at the center height in the Y direction, and have uniform thickness. The spacing between adjacent Z-direction ribs 6 is the same in the Z direction, and the Z-direction ribs 6 have uniform thickness. The spacing between adjacent Z-direction ribs 6 decreases from the middle to the sides in the X direction, and the decreasing pattern is linear decreasing or normally distributed decreasing.

[0027] The internal void 5 is filled with thermal insulation, sound insulation, or fireproof material to form a void-filling layer. The internal void 5 is a rectangular cavity. The arc panel 1 has a curvature ranging from 0° to 180°; the curvature of the arc panel 1 gradually decreases along the Z direction. The arc panel 1 is twisted along the Z direction, with the twisting degree ranging from 0° to 90°.

Claims

1. A high-strength, lightweight thermal insulation structure based on cattail leaf bionics, comprising an exterior panel, an internal support sheet, and a gap filling layer, characterized in that: The outer panel comprises a circular arc panel (1) and a flat panel (2); two sides of the circular arc panel (1) are respectively fixed to two sides of the flat panel (2); a cavity is formed between the circular arc panel (1) and the flat panel (2); the inner support sheet is arranged in the cavity; the inner support sheet is fixed to the circular arc panel (1) and the flat panel (2); an inner gap (5) is provided on the inner support sheet; and the inner gap (5) is filled with a gap filling layer; The internal support plate comprises crisscrossed X-direction ribs (3), Y-direction ribs (4), and Z-direction ribs (6); The thickness of the X-direction fins (3) is uniform or decreases from the middle to the two sides, and the spacing between adjacent X-direction fins (3) is uniform or decreases from the middle to the two sides, and the decreasing rule is linear decreasing or normal distribution decreasing; The Y-direction fins (4) are arranged between adjacent X-direction fins (3), are located at the center height in the Y direction, and have uniform thickness; The spacing between adjacent Z-direction fins (6) is the same in the Z-direction, and the thickness of the Z-direction fins (6) is uniform; the spacing between adjacent Z-direction fins (6) decreases from the middle to both sides in the X-direction, and the decreasing rule is linear decreasing or normal distribution decreasing; The arc panel (1) has an arc angle ranging from 0° to 180°; The arc of the arc panel (1) gradually decreases along the Z direction; The arc panel (1) is twisted along the Z direction, and the degree of twisting varies from 0° to 90°.

2. The high-strength and lightweight thermal insulation structure based on cattail leaf bionics according to claim 1, characterized in that: The internal void (5) is filled with thermal insulation material, sound insulation material or fireproof material to form a void filling layer.

3. The high-strength and lightweight thermal insulation structure based on cattail leaf bionics according to claim 1, characterized in that: The internal space (5) is a rectangular cavity.

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