WO2020224436A1

WO2020224436A1 - Support column array having varying elastic modulus, and vacuum glass

Info

Publication number: WO2020224436A1
Application number: PCT/CN2020/086070
Authority: WO
Inventors: 孙诗兵; 刘敏; 李要辉; 吕锋; 王晋珍; 田英良; 崔素萍; 司国栋; 金晓冬
Original assignee: 北京工业大学; 中国建筑材料科学研究总院有限公司
Priority date: 2019-05-06
Filing date: 2020-04-22
Publication date: 2020-11-12
Also published as: CN110204222A; CN110204222B

Abstract

A support column array having a variable elastic modulus, and a vacuum glass. A first ring of support columns in the variable elastic modulus support column array close to a sealed edge of the vacuum glass comprises low-elastic modulus support columns. A second ring of support columns close to the sealed edge of the vacuum glass comprises high-elastic modulus support columns. In this manner, rings of low elastic modulus support columns and rings of high elastic modulus support columns are alternately arranged in a direction leading away from the sealed edge of the vacuum glass, until the support columns are all arranged. The vacuum glass is formed from the varying elastic modulus support column array and flat glass. The varying elastic modulus support column array reduces the maximum stress and the maximum deformation sustained by the vacuum glass, thereby reducing glass damage and missing support columns. The arrangement of the varying elastic modulus support columns can be applied without changing the original array spacing of support columns of existing products, or using the array spacing of support columns in novel designs.

Description

A differential elastic modulus support column array and vacuum glass

Technical field

The invention relates to the technical field of vacuum glass, in particular to a differential elastic modulus support column array and vacuum glass, which is suitable for the manufacture of flat vacuum glass.

Background technique

The two plates of vacuum glass are supported by supporting columns arranged in an array to form a gap; the four peripheries of the two plates of plate glass are sealed with edge sealing materials to form an edge; and the vacuum is drawn from the preset holes on the plate glass Sealing, a vacuum is formed between the two plates of glass; the above process and material combination form a flat vacuum glass (referred to as vacuum glass). Among them, the edge sealing refers to the process of sealing the surroundings of the vacuum glass, and also refers to the structure formed by the edge sealing material and the glass bonded to it. Vacuum prevents the three basic heat transfer methods of heat conduction and convection heat transfer. The flat glass such as low-e glass will prevent heat radiation and heat transfer. Therefore, vacuum glass has excellent thermal insulation effect and is widely used in building doors, windows and curtain walls. On products such as heat preservation and freezer cold preservation.

In the practical application of vacuum glass as doors and windows, curtain walls, freezers, etc., vacuum glass is used as a whole piece of glass, and another piece of flat glass is used to form hollow glass. The sealing edge of the vacuum glass and the spacer of the insulating glass are hidden in the profile of the door and window, curtain wall, and freezer door frame.

Vacuum glass should have a good perspective effect, so the support column should be as small as possible to avoid discomfort in perspective. Usually the diameter of the vacuum glass support column is about 0.15mm, it is difficult to detect the existence of the support column without careful identification. The height of the support column is generally about 0.15mm, because the thin and tall support column is easy to lose stability, and the vacuum heat resistance characteristics have nothing to do with the vacuum thickness. Compared with vacuum, the thermal conductivity of the support column is very high. The thermal conductivity of metal materials is usually around 100W/m·K, and the thermal conductivity of non-metal materials is usually around 1W/m·K. The supporting column can be seen as a "bridge pier" between two pieces of flat glass. If the array arrangement density of the support columns is too large (that is, the spacing of the support column array is small), a large number of support columns will form a "thermal bridge" and reduce the thermal insulation performance of the vacuum glass. If the arrangement density is too small (that is, the spacing between the support column arrays is large), the following two unfavorable effects will occur. First, the bearing capacity per unit area of the support column increases, and correspondingly, the bearing capacity per unit area of the glass in contact with the support column increases. At this time, the support column may pierce the glass, causing damage to the glass, which may burst in severe cases. Second, the span of the glass between the two support columns is increased. Due to the small vacuum gap, the glass will be deformed under force, and the glass itself has a certain degree of unevenness, causing the two plates of glass to contact, that is, "glass bonding" Phenomenon, in this way, direct contact and heat transfer between the glasses lose the effect of vacuum insulation. The above factors determine the arrangement density of the support column has an optimized range. At present, the optimized result is that the spacing of the support column array is 30mm-50mm, and the same material is used, that is, the material with the same elastic modulus is used as the support column, and the material of the support column has no difference in elastic modulus.

After being evacuated, the vacuum glass is generally subjected to 1 atmosphere pressure, and at the same time, it is also subjected to the pressure of the flat glass's own weight (usually 4mm or 5mm glass). In the process of using vacuum glass, it has to withstand wind pressure, stress caused by wind pressure, stress caused by temperature difference deformation, and stress caused by structural deformation. These roles need to be shared by supporting columns and flat glass. Under the action of external force, stress and deformation are generated. Excessive stress or deformation can cause material damage.

There is no physical or chemical connection between the flat glass and the support column, and it is only tightly fixed by the pressure difference between the inside and outside formed by the vacuum. When the deformation is too large (including the unevenness of the flat glass itself), some support columns will not be fully compressed, and the support columns will move to other positions, resulting in the common phenomenon of vacancy of the support columns (that is, the array position has no support columns). The vacancy causes the glass at that place to be unsupported and deformed too much, which can form glass bonding. The vacancy also causes greater stress on the support pillars around the vacancy. The area of the flat glass is large, but the contact part of the plate glass can be regarded as a point contact. Excessive stress on the support column means that the glass in contact with it bears greater stress. Since glass is a brittle material, excessive stress here will cause cracks in the glass. This kind of crack is not uncommon in actual vacuum glass, and it is also one of the important reasons for the destruction of vacuum glass. The ideal support effect is that the support columns are uniformly stressed and the glass is uniformly deformed to avoid stress concentration and excessive deformation. It can be seen from the above that in the relationship between the plate glass and the support column, the stress and deformation of the plate glass are the main factors that cause the failure and damage of the vacuum glass.

The failure and damage of vacuum glass are mainly caused by excessive local stress or deformation. It is a recognized problem in the vacuum glass industry to handle the relationship between stress and deformation of vacuum glass.

Summary of the invention

In view of the deficiencies in the above-mentioned problems, the present invention provides a differential elastic modulus support column array and vacuum glass, aiming to improve the force balance and deformation balance of the glass, so that the vacuum glass material and its structure can be coordinated It can reduce local stress or deformation, and improve the safety and reliability of vacuum glass.

The invention discloses a differential elastic modulus support column array, which is applied between two sheets of flat glass of vacuum glass. The first circumferential support column close to the edge of the vacuum glass is a low elastic modulus support column, which is close to the vacuum glass. The support column for the second circumference of the sealing is a high elastic modulus support column;

By analogy, in the direction away from the edge of the vacuum glass, a peripheral ring of low elastic modulus support columns and a peripheral ring of high elastic modulus support columns are alternately arranged until the support columns are all arranged.

As a further improvement of the present invention, the ratio of the elastic modulus of the low elastic modulus support column to the elastic modulus of the high elastic modulus support column is (0.15-0.5):1.

As a further improvement of the present invention, the height of the low elastic modulus support column and the high elastic modulus support column are the same, and the distance between the two adjacent circumferential support columns is the same.

The invention also discloses a vacuum glass, which comprises: two sheets of flat glass and the above-mentioned differential elastic modulus support column array;

The differential elastic modulus support column array is placed between two sheets of flat glass, and the four peripheries of the two sheets of flat glass are sealed with an edge sealing material to form an edge seal.

As a further improvement of the present invention, it also includes auxiliary edges;

An auxiliary edge is arranged at a position close to the edge sealing, and the auxiliary edge is located inside the edge sealing.

As a further improvement of the present invention, the elastic modulus of the auxiliary edge is 1 to 1.3 times the elastic modulus of the edge sealing material.

As a further improvement of the present invention, the auxiliary edge is arranged parallel to the sealing edge, and the distance between the auxiliary edge and the parallel sealing edge is 1 to 2 mm.

As a further improvement of the present invention, the height of the auxiliary edge is the same as the height of the sealing edge, the width of the auxiliary edge is 0.1-0.5mm, and the distance between the two ends of the auxiliary edge and the inner edges of the two vertical sealing edges is 3mm～15mm.

Compared with the prior art, the beneficial effects of the present invention are:

The differential elastic modulus support column array of the present invention can reduce the maximum stress and maximum deformation of vacuum glass, thereby reducing glass damage and the occurrence of support column vacancies. In the case that the original array spacing of the support columns of the existing product remains unchanged, or the new design Under the condition of the array spacing of the supporting pillars, the effect of the arrangement of the supporting pillars with the differential elastic modulus is valid.

The invention can reduce the maximum stress and maximum deformation of the sealing edge by arranging the auxiliary edge in the vacuum glass, especially reducing the tensile stress of the sealing edge, thereby reducing the occurrence of edge sealing failure.

Description of the drawings

Fig. 1 is a schematic structural diagram of a differential elastic modulus support column array disclosed in an embodiment of the present invention;

2 is a schematic diagram of the structure of the vacuum glass disclosed in an embodiment of the present invention;

3 is a schematic structural diagram of a vacuum glass with auxiliary edges disclosed in an embodiment of the present invention;

4 is a comparative displacement cloud diagram of a single elastic modulus support column and a differential elastic modulus support column disclosed in an embodiment of the present invention;

Fig. 5 is a comparison diagram of edge sealing displacement before and after setting auxiliary edges according to an embodiment of the present invention.

In the picture:

1. Low elastic modulus support column; 2. High elastic modulus support column; 3. Edge banding; 4. Auxiliary edge.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, but not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

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

The failure and damage of vacuum glass are mainly caused by excessive local stress or deformation. It is a recognized problem in the vacuum glass industry to handle the relationship between stress and deformation of vacuum glass. The invention aims to improve the force balance and deformation balance of the glass, so that the vacuum glass material and its structure work together, reduce excessive local stress or deformation, and improve the safety and reliability of the vacuum glass. The improvement effect is mainly evaluated by reducing the maximum stress and maximum deformation. However, the stress and deformation of vacuum glass are extremely complex, and it is difficult to find these relationships of vacuum glass through physical test methods. The invention utilizes the method of combining simulation calculation and experiment, and the results and conclusions obtained on the basis of a large number of studies.

To this end, as shown in Figures 1 and 2, the present invention provides a differential elastic modulus support column array, which is applied between two sheets of flat glass of vacuum glass, including: differential elastic modulus support columns arranged in a circumferential ring ；

The first circumferential support column close to the vacuum glass sealing edge 3 is a low elastic modulus support column 1, the second circumferential support column close to the vacuum glass sealing 3 is a high elastic modulus support column 2, and the second circumferential support column It is the nearest inner circumference of the first circumference of the support column; and so on, in the direction away from the edge of the vacuum glass, one circumference of the low elastic modulus support column and one circumference of the high elastic modulus support column are alternately arranged, Until the support columns are all arranged, an array of different elastic modulus support columns is formed.

As shown in Figure 2, the present invention provides a vacuum glass, including: two sheets of flat glass and a differential elastic modulus support column array;

The differential elastic modulus support column array is placed between two pieces of flat glass, and the four peripheries of the two pieces of flat glass are sealed with an edge sealing material to form an edge sealing 3.

The design principle of the differential elastic modulus support column array of the present invention is:

The modulus of elasticity is the ratio of stress to strain when the material is deformed, reflecting the degree of difficulty of material deformation, and is the basic performance of the material. The greater the elastic modulus, the lower the material's deformability, which is represented by greater rigidity; the smaller the elastic modulus, the greater the material's deformability, which is represented by greater flexibility. Therefore, the industry knows how to select the specific material of the support column according to the elastic modulus. Based on the basic concept of elastic modulus, the second way of expression of the present invention is to use the same elastic modulus material, and use a thinner support column for the support column near the first circumference of the sealing edge; The support column adopts a thicker support column, and so on, in the direction away from the sealing edge, a support column with a thin circumference and a support column with a thick circumference are alternately performed until the support columns are all arranged. In the process of manufacturing vacuum glass, support columns with different thicknesses (ie, support columns with different thicknesses) are not easy to be compressed and displaced, forming a support column vacancy, which is poor in practicality. The third expression of the present invention is that the same elastic modulus material is used, the support column near the first circumference of the sealing edge adopts a thinner support column; the support column near the second circumference of the sealing edge adopts a thicker support Columns, and so on, move away from the sealing edge. A support column with a thinner circumference and a support column with a thicker circumference alternate until the support columns are all arranged. Support columns with different cross-sectional areas (ie, support columns with different cross-sectional areas) are easy to lose stability and have poor practicability.

The arrangement of the different elastic modulus support column, the arrangement of the different thickness support column and the arrangement of the different cross-sectional area support column are the same in principle. The differential elastic modulus arrangement has strong practicability, so the present invention adopts this arrangement to express. In order to facilitate implementation, the high elastic modulus support column of the present invention is made of materials with the same elastic modulus, and the low elastic modulus support column is made of materials with the same elastic modulus.

The advantage of the differential elastic modulus support column array of the present invention is to reduce the maximum stress and maximum deformation of the vacuum glass, thereby reducing glass damage and the occurrence of support column vacancies. Under the condition that the original array spacing of the support pillars of the existing product remains unchanged, or the array spacing of the newly designed support pillars, the effect of the arrangement of the different elastic modulus support pillars is valid. The invention does not restrict the array arrangement pitch of the support columns.

Further, the ratio of the elastic modulus of the low elastic modulus support column to the elastic modulus of the high elastic modulus support column of the present invention is (0.15-0.5):1, preferably (0.2-0.5):1; The low elastic modulus support column and the high elastic modulus support column have the same height, the spacing between two adjacent circumferential support columns is the same, and the elastic modulus of the low elastic modulus support column or the high elastic modulus support column of different circumferential rings is the same.

The design principle of the ratio of the elastic modulus of the low elastic modulus support column to the high elastic modulus support column is:

The industry knows the principles for the selection of support column materials, such as having sufficient strength and as low thermal conductivity as possible. Based on the different elastic modulus support column layout, when the ratio of the low elastic modulus to the high elastic modulus of the support column material is (0.15~0.5):1, the effect of significantly reducing the maximum stress and maximum deformation of the flat glass can be obtained. The effect of the different elastic modulus support column layout has a direct and important relationship with the support column array spacing. The embodiment illustrates the implementation effect of the specific support column array spacing. When the present invention is implemented, other specific support column array spacings can be used to correct The elastic modulus ratio of the support column is optimized. At the same time, the different elastic modulus support columns have the same height, so that during the preparation of vacuum glass, the support columns are not easy to be displaced and form vacancies. In the service process, the difference in elastic modulus of the support columns can be used to adjust the stress and Deformation, to achieve a balanced force and deformation.

Except for the support column array design which is likely to cause glass damage and support column vacancies, in the existing vacuum glass, the height of the edge-sealing material sandwiched between two sheets of flat glass (edge-sealing height) should be as same as the height of the support column. . The width of the sealing edge should not be too large. On the one hand, the thermal conductivity of the sealing edge is large, forming a heat transfer "thermal bridge"; on the other hand, the sealing edge width is too large to reduce the light transmission area. The currently used edge sealing width is generally between 6mm and 8mm. Practice has proved that this width can ensure the airtightness of the seal, that is, ensure the vacuum or air tightness of the device. After being evacuated, the vacuum glass is generally subjected to 1 atmosphere pressure, and at the same time, it is also subjected to the pressure of the flat glass's own weight (usually 4mm or 5mm glass). In the process of using vacuum glass, it has to withstand wind pressure, stress caused by wind pressure, stress caused by temperature difference deformation, and stress caused by structural deformation. These functions also need to be shared by the edge banding material and edge banding structure. Under the action of external force, stress and deformation are generated. Excessive stress or deformation can cause material damage. In terms of structure and force, vacuum glass can be seen as a combination of two materials, one is the relationship between the above-mentioned plate glass and the supporting column, and the other is the relationship between the plate glass and the edge sealing material, that is, edge sealing. The relationship between the flat glass and the edge sealing material is: two pieces of flat glass are connected by the edge sealing material to form an edge sealing. Edge sealing is the real physical or chemical connection part of the vacuum glass component, making the vacuum glass a whole. Edge sealing strength is the basic performance of sealing performance. Excessive stress or deformation can cause damage to the sealing edge, including the fracture of the flat glass, the cracking between the edge sealing material and the glass, and the joint cracking between the edge sealing material and the glass. Damage to the edge banding can cause vacuum failure and severe damage to the product. In the relationship between the plate glass and the edge-sealing material, the stress and deformation of the edge-sealing as a whole should not be too large.

In order to solve the above problems, as shown in Figure 3, the present invention adds an auxiliary edge 4 to the vacuum glass shown in Figure 2, that is, an auxiliary edge 4 is arranged near the sealing edge 3, and the auxiliary edge 4 is located at the edge of the sealing edge 3. Inside. The auxiliary edge of the present invention is relative to the edge sealing, and has the advantages of reducing the maximum stress and maximum deformation of the sealing edge, especially reducing the tensile stress of the sealing edge, thereby reducing the occurrence of edge sealing damage.

Further, the modulus of elasticity of the auxiliary edge of the present invention is 1 to 1.3 times the modulus of elasticity of the edge sealing.

The design principle of the elastic modulus of the auxiliary side is:

The present invention finds that the elastic modulus of the auxiliary edge material and the elastic modulus of the edge banding material must be coordinated to effectively play the role of the auxiliary edge. The optimized result is that the elastic modulus of the auxiliary edge material is 1 to 1.3 times that of the edge banding material. The elastic modulus of the edge banding material can be obtained through testing. GB/T 34338 "Test Method for the Mechanical Properties of Fusing Glass for Vacuum Glass" gives a test method for the elastic modulus of the edge banding material. Then, the technical personnel in the industry select the specific material of the auxiliary edge according to the relationship between the elastic modulus of the auxiliary edge material being 1 to 1.3 times the elastic modulus of the edge banding material. As a recommendation, it is recommended to use metal materials, because the size of metal materials is easier to control, easy to install and make. In the relevant material manual, you can easily find the elastic modulus of the material.

Further, the auxiliary edge of the present invention is arranged parallel to the sealing edge, and the distance between the auxiliary edge and the parallel sealing edge is 1 to 2 mm; the height of the auxiliary edge is the same as the height of the sealing edge, and the width of the auxiliary edge is 0.1 to 0.5 mm. The distance between the two ends and the inner edges of the two vertical sealing edges is 3mm～15mm.

The design principle of the auxiliary side layout position is:

The distance between the auxiliary edge and the sealing edge considers two factors, one of which is to achieve the effect of reducing stress and deformation. Second, the sealing edge and the auxiliary edge should not be too wide to avoid increasing the heat transfer performance. The result of optimization is that the distance between the auxiliary edge and the sealing edge is 1~2mm. The height of the auxiliary side is the same as the height of the edge-sealing material. If the auxiliary side is too high, it will not only bear excessive stress, but also affect the preparation of vacuum glass. The optimized width of the auxiliary side is 0.15~0.5mm, and an excessively wide auxiliary side will increase heat transfer. The length of the auxiliary edge is the length of the distance between the inner edges of the two sealing edges 3mm-15mm. In effect, the four auxiliary edges around the vacuum glass can be continuous lines, such as metal wires; they can also be intermittent lines, such as several intermittent metal wires; they can also be lines composed of points, such as metal points like support columns. composition.

Example 1

The present invention provides a differential elastic modulus support column array for vacuum glass. The material of the low elastic modulus support column is YH75 aluminum alloy, the elastic modulus is 75GPa, and the material of the high elastic modulus support column is 301 stainless steel. Its elastic modulus is 210 GPa. The ratio of the low elastic modulus to the high elastic modulus of the support column material is 0.34, and the spacing of the support column array is 30 mm. The height of the aluminum alloy and stainless steel support columns is the same, and the same as the edge banding material, which is 0.2mm. The support column of the first circumferential ring close to the sealing edge is made of aluminum alloy, and the support column of the second circumferential ring close to the sealing edge is made of stainless steel, and so on, in the direction away from the sealing edge, one circumferential glass support column, one circumferential ring Circle the stainless steel support columns alternately until all the support columns are arranged.

With a single stainless steel support column, the maximum displacement of the plate glass occurs between the first circumferential support column and the second circumferential support column, as shown in the displacement distribution cloud diagram in Figure 4a. After alternate use of aluminum alloy support columns and stainless steel support columns, the maximum displacement is reduced by 21.7%, as shown in the displacement distribution cloud diagram in Figure 4b. The maximum stress occurs at the support column in the second circle. After alternate use of aluminum alloy support columns and stainless steel support columns, the maximum stress can be reduced by 14.2%.

The invention provides a vacuum glass with an auxiliary edge arranged near the edge sealing position. The edge-sealing width is 6mm, the edge-sealing material is glass fusion sealing solder, its elastic modulus is 75GPa, and its height is 0.2mm, the auxiliary edge material is YH75 aluminum alloy, and its elastic modulus is 75GPa. The ratio of elastic modulus between the two is 1:1. The distance between the auxiliary edge and the sealing edge is 1mm, the height is the same as the height of the edge sealing material, its width is 1mm, and its length is the length of the 4mm distance from the inner edges of the two sealing edges.

As shown in Figure 5, the displacement comparison before and after the auxiliary edge is set. When there is no auxiliary edge, the maximum deformation of the sealing edge close to the support column unit (curve 1 in Figure 5a) is about 2.5nm, and the compressive stress; close to the support column unit (curve 2 in Figure 5a), the deformation is small; close to the support column unit ( Curve 3) in Figure 5a, the maximum deformation is about 1.0nm, under tensile stress. After setting the auxiliary edge, the maximum maximum deformation of the sealing edge is about 0.35nm (curve 3 in Figure 5b), under tensile stress. The maximum deformation caused by tensile stress before and after the auxiliary edge is set is reduced by 65.0%. The maximum tensile stress occurs at the outermost side of the sealing edge (the side away from the support column). After the auxiliary edge is set, the maximum tensile stress is reduced by 60.0%.

Example 2

The present invention provides a differential elastic modulus support column array for vacuum glass, the material of the low elastic modulus support column is C97 copper alloy, the elastic modulus is 95 GPa; the material of the high elastic modulus support column is 301 stainless steel, the elastic modulus The volume is 210GPa, and the spacing of the support column array is 40mm. The support column of the first circumference near the sealing edge is made of copper alloy, and the support column of the second circumference near the sealing edge is made of stainless steel, and so on, in the direction away from the sealing edge, one circumference of copper alloy support pillar and one The surrounding stainless steel support columns alternate until all the support columns are arranged. The ratio of the low elastic modulus to the high elastic modulus of the support column material is 0.45, and the height of the copper alloy support column and the stainless steel support column are the same, which is 0.2mm.

The maximum displacement of the plate glass occurs between the four support columns at the corners, and the maximum displacement can be reduced by 11.5%. For other parts of the plate glass, the displacement of the plate glass between every four support columns can be reduced by 23.0%.

The invention provides a vacuum glass with an auxiliary edge arranged near the edge sealing position. The edge-sealing width is 2mm, and the edge-sealing material is glass fusion sealing solder, its elastic modulus is 75GPa, and its height is 0.2mm. The auxiliary side material is YH75 aluminum alloy, and its elastic modulus is 75GPa. The distance between the auxiliary edge and the sealing edge is 1mm, the height is the same as the height of the edge sealing material, its width is 2mm, and its length is the length of the distance between the inner edges of the two sealing edges 7mm.

After setting the auxiliary edge, the maximum displacement at the sealing edge is reduced by 25%, and the maximum tensile stress at the sealing edge is reduced by 25%.

Example 3

The present invention provides a differential elastic modulus support column array for vacuum glass. The material of the low elastic modulus support column is QMn1.5 (Cu-1.5Mn) manganese bronze alloy, and its elastic modulus is 105 GPa and high elastic modulus. The material of the support column is 301 stainless steel, its elastic modulus is 210 GPa, and the array spacing of the support column is 50 mm. The support column of the first circumference near the sealing edge is made of manganese bronze alloy, the support column of the second circumference near the sealing edge is made of stainless steel, and so on, in the direction away from the sealing edge, one circumference glass support column, one The surrounding stainless steel support columns alternate until all the support columns are arranged. The ratio of the low elastic modulus to the high elastic modulus of the support column material is 0.5, and the height of the aluminum alloy support column and the stainless steel support column are the same, which is 0.2mm.

The maximum displacement of the plate glass occurs between the four support columns at the corners, and the maximum displacement can be reduced by 10.19%. For the other parts of the plate glass, the plate glass displacement between every four support columns can be reduced by 27%.

The invention provides a vacuum glass with an auxiliary edge arranged near the edge sealing position. The edge sealing width is 10mm, the edge sealing material is glass fusion sealing, the elastic modulus is 75GPa, the height is 0.2mm, and the auxiliary edge material is YH75 aluminum alloy. The distance between the auxiliary edge and the sealing edge is 1mm, the height is the same as the height of the edge sealing material, its width is 0.5mm, and its length is the length of the distance between the inner edges of the two sealing edges 10mm.

After setting the auxiliary edge, the maximum displacement at the sealing edge is reduced by 18.2%, and the maximum tensile stress at the sealing edge is reduced by 15.4%.

The above are only preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc., made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

A differential elastic modulus support column array, applied between two sheets of flat glass of vacuum glass, characterized by:

The first circumferential support column near the vacuum glass edge sealing is a low elastic modulus support column, and the second circumferential support column near the vacuum glass sealing edge is a high elastic modulus support column;

By analogy, in the direction away from the edge of the vacuum glass, a peripheral ring of low elastic modulus support columns and a peripheral ring of high elastic modulus support columns are alternately arranged until the support columns are all arranged.
The differential elastic modulus support column array according to claim 1, wherein the ratio of the elastic modulus of the low elastic modulus support column to the elastic modulus of the high elastic modulus support column is (0.15～0.5 ):1.
The differential elastic modulus support column array according to claim 1, wherein the height of the low elastic modulus support column and the high elastic modulus support column are the same, and the distance between the support columns of two adjacent circles is the same.
A vacuum glass, characterized by comprising: two sheets of flat glass and the differential elastic modulus support column array according to any one of claims 1-3;

The differential elastic modulus support column array is placed between two sheets of flat glass, and the four peripheries of the two sheets of flat glass are sealed with an edge sealing material to form an edge seal.
The vacuum glass according to claim 4, further comprising an auxiliary edge;

An auxiliary edge is arranged at a position close to the edge sealing, and the auxiliary edge is located inside the edge sealing.
8. The vacuum glass according to claim 5, wherein the elastic modulus of the auxiliary edge is 1 to 1.3 times the elastic modulus of the edge sealing material.
The vacuum glass according to claim 5, wherein the auxiliary edge is arranged in parallel with the sealing edge, and the distance between the auxiliary edge and the parallel sealing edge is 1 to 2 mm.
The vacuum glass according to claim 7, wherein the height of the auxiliary edge is the same as the height of the sealing edge, the width of the auxiliary edge is 0.1-0.5mm, and the two ends of the auxiliary edge are two perpendicular The distance between the inner edge of the sealing edge is 3mm～15mm.