High-strength screen

Abstract

The invention discloses a high-strength screen which comprises a screen body, the screen body is formed by weaving stainless steel wires, and a fluorosilicone layer is sprayed on the surface of the screen body. The surface texture of the screen subjected to surface treatment is a pattern with concave-convex textures, the contact area between the screen and the surface of a material is changed from face to point, the contact area between the screen and the material is reduced, the fluidity and the sliding performance of the material are improved, and compared with an existing screen, the passing rate of materials with the same particle size, the same diameter and the same components of the screen is four times that of an existing common screen. The treatment capacity of screening equipment is improved, the maintenance frequency of the screen is reduced, and the service life of the screen is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of screening meshes, and specifically relates to a high-strength screening mesh. Background Art

[0002] A screening mesh is woven from metal wires or fiber wires, and can remove and recover suspended solids of different types and sizes. Screening mesh separation has the advantages of simplicity, high efficiency, and low operating costs. Different from ordinary mesh products, a screening mesh has strict series of mesh sizes and is a mesh product that meets industry, institutional, and standard approvals and has the function of grading and screening object particles.

[0003] In the prior art, screening meshes are consumables in the screening industry. As the mesh number of the screening mesh increases, the size of the material particles that can pass through during the screening process becomes smaller. Subsequently, problems such as electrostatic adsorption due to friction, material agglomeration, and clogging of holes will occur, resulting in a lower passing rate of the mesh surface of the screening mesh. At the same time, due to the accumulation of materials, the phenomenon of the mesh surface of the screening mesh bearing an overload and breaking the mesh will also occur. Summary of the Invention

[0004] The purpose of the present invention is to address the defects of the existing screening meshes described above, and provide a high-strength screening mesh. By subjecting the screening mesh to nano-spray coating, the resulting screening mesh has characteristics such as high strength and good wear resistance. Compared with the existing screening meshes, the passing rate of the same particle size diameter and same composition materials of the present screening mesh is 4 times that of the existing ordinary screening meshes, improving the processing capacity of the screening equipment, reducing the maintenance frequency of the screening mesh, and extending the service life of the screening mesh.

[0005] Technical Solution

[0006] To achieve the above technical purpose, the present invention provides a high-strength screening mesh, which includes a mesh body. The mesh body is woven from stainless steel wires, and is characterized in that: a fluorosilicon layer is sprayed on the surface of the mesh body.

[0007] Further, the material of the fluorosilicon layer is fluorinated nano-silica sol with a particle size of 98 nm to 400 nm.

[0008] Further, the fluorinated nano-silica sol is formed by stirring tetraethyl orthosilicate, absolute ethanol, perfluorooctyltriethoxysilane, diethyldichlorosilane, and ammonia water at a certain temperature.

[0009] Further, the fluorinated nano-silica sol is prepared by stirring for (1 - 2) hours at room temperature (15° - 30°) with 3 parts by volume of tetraethyl orthosilicate, 100 parts by volume of absolute ethanol, 0.5 parts by volume of pure water, 1 part by volume of perfluorooctyltriethoxysilane, 1 part by volume of diethyldichlorosilane, and 1 part by volume of ammonia water.

[0010] Further, the average particle size of the prepared fluorinated nano-silica sol is (98 - 170) nm.

[0011] Further, the fluorinated nano-silica sol is prepared by stirring 3 parts by volume of tetraethyl orthosilicate, 100 parts by volume of absolute ethanol, 0.5 parts by volume of pure water, 1 part by volume of perfluorooctyltriethoxysilane, 1 part by volume of diethyldichlorosilane, and 1 part by volume of ammonia water at a temperature of (43° - 56°) for (1.5 - 3) hours.

[0012] Further, the average particle size of the prepared fluorinated nano-silica sol is (160 - 400) nm.

[0013] Further, the fluorosilicon layer is formed by mixing and proportioning or separately stirring fluorinated nano-silica sols with different particle sizes.

[0014] Beneficial Effects

[0015] A high-strength screen provided by the present invention includes a screen body, the screen body is woven from stainless steel wires, and a fluorosilicon layer is sprayed on the surface of the screen body. After surface treatment, the surface texture of the screen is in the form of concave-convex texture, the contact area with the surface of the material changes from surface to point, reducing the contact area with the material, increasing the fluidity and sliding property of the material. Compared with the existing screen, the passing rate of the same particle size diameter and same composition material of this screen is 4 times that of the existing ordinary screen, improving the processing capacity of the screening equipment, reducing the screen maintenance frequency, and extending the service life of the screen. Brief Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0017] Attached Figure 1 is a schematic diagram of the screen structure in Embodiment 1 of the present invention; Detailed Embodiments

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of them. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0019] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are only for illustrative purposes and do not represent the only implementation.

[0020] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0021] In this application, unless otherwise clearly specified and limited, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0022] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0023] Embodiment

[0024] The screen is mainly made of steel wire, nylon, plastic or carbon fiber materials. Due to considerations of processability, weavability and the characteristic of not easily generating foreign matters, steel wire meshes are most commonly used. As the mesh number of the screen increases and the screening particles become finer and finer, conventional steel wire screens are prone to mesh blockage due to their thin wire diameters and surface burrs, resulting in low production efficiency. At the same time, due to the low passing rate, the surface of the screen bears and accumulates the pressed materials, which may cause damage to the screen and form a broken mesh. To solve this problem, this embodiment provides a high-strength screen, which includes a screen body 1. The screen body 1 is woven from stainless steel wires, and a fluorosilicon layer is sprayed on the surface of the screen body 1. The material of the fluorosilicon layer is fluorinated nano-silica sol with a particle size ranging from 98 nm to 400 nm. The fluorosilicon layer is formed by mixing and proportioning or separately stirring fluorinated nano-silica sols with different particle sizes.

[0025] Among them, the fluorinated nano-silica sol is prepared by stirring tetraethyl orthosilicate, absolute ethanol, perfluorooctyltriethoxysilane, diethyldichlorosilane and ammonia water at a certain temperature. Further, specifically, it is as follows: (1) Prepare the first kind of fluorinated nano-silica sol A with a certain particle size: Weigh 3 mL of tetraethyl orthosilicate, 100 mL of absolute ethanol, 0.5 mL of H2O, 1 mL of 1H,1H,2H,2H-perfluorooctyltriethoxysilane, 1 mL of diethyldichlorosilane, add 1 mL of ammonia water, and stir at a reaction temperature of 25 °C for 1 h to obtain fluorinated nano-silica sol A with an average particle size of 150 nm.

[0026] (2) Prepare the second kind of fluorinated nano-silica sol B with a certain particle size: Weigh 3 mL of tetraethyl orthosilicate, 100 mL of absolute ethanol, 0.5 mL of H2O, 1 mL of 1H,1H,2H,2H-perfluorooctyltriethoxysilane, and 1 mL of diethyldichlorosilane, mix them, then add 1 mL of ammonia water, and stir at a reaction temperature of 50 °C for 2 h to obtain fluorinated nano-silica sol B with an average particle size of 400 nm.

[0027] (3) The fluorinated nano-silica sol A can be continuously mixed with the fluorinated nano-silica sol B in a volume ratio of 1:1, magnetically stirred at room temperature for 30 min and then left to stand, and zirconia, alumina and silica materials are added in proportion to obtain the fluorosilicon material for the superhydrophobic coating.

[0028] In this embodiment, through surface modification of the surface of the wire mesh wire diameter, while not changing the wire diameter and aperture size, the durability and sieving efficiency of the sieve are improved. The surface texture of the sieve after surface treatment is in the form of concave and convex texture. The contact area with the material surface changes from surface to point, reducing the contact area with the material and increasing the fluidity and sliding property of the material. The fluorosilicon layer has a temperature resistance range of -30°C to 280°C and salt spray resistance: 400 (neutral salt spray). Compared with the existing sieve, the passing rate of the same particle size diameter and same composition material of this sieve is 4 times that of the existing ordinary sieve, improving the processing capacity of the screening equipment, reducing the sieve maintenance frequency, and extending the service life of the sieve.

[0029] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0030] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A high-strength screen, comprising a screen body, the screen body being woven from stainless steel wires, characterized in that: The surface of the screen body is sprayed with a fluorine silicon layer.

2. A high-strength screen according to claim 1, characterized in that: The material of the fluorine silicon layer is fluorinated nano-silicon dioxide sol with a particle size of 98nm to 400nm.

3. A high-strength screen according to claim 1, characterized in that: The fluorinated nano-silica sol is prepared by stirring ethyl orthosilicate, anhydrous ethanol, perfluorooctyltriethoxysilane, diethyldichlorosilane and ammonia water at a certain temperature.

4. A high-strength screen according to claim 1, characterized in that: The fluorinated nano-silica sol is prepared by stirring (1-2) hours at room temperature (15°-30°) with 3 parts by volume of ethyl orthosilicate, 100 parts by volume of anhydrous ethanol, 0.5 parts by volume of pure water, 1 part by volume of perfluorooctyltriethoxysilane, 1 part by volume of diethyldichlorosilane and 1 part by volume of aqueous ammonia.

5. A high-strength screen as claimed in claim 4, characterized in that: The average particle size of the prepared fluorinated nano-silicon dioxide sol is (98-170) nm.

6. A high-strength screen according to claim 1, characterized in that: The fluorinated nano-silica sol is prepared by stirring (1.5-3) hours at a temperature of (43°-56°) for 3 parts by volume of ethyl orthosilicate, 100 parts by volume of anhydrous ethanol, 0.5 parts by volume of pure water, 1 part by volume of perfluorooctyltriethoxysilane, 1 part by volume of diethyldichlorosilane and 1 part by volume of aqueous ammonia.

7. A high-strength screen according to claim 6, characterized in that: The average particle size of the prepared fluorinated nano-silicon dioxide sol is (160-400) nm.

8. A high-strength screen as claimed in claim 2, characterized in that: The fluorine-silicon layer is formed by mixing or stirring fluorinated nano-silicon dioxide sols of different particle sizes.

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