A method for preparing high-impact enamel composite cable tray

Abstract

The present invention belongs to the field of cable bridge technology forming, and provides a method for preparing a high-impact enamel composite cable bridge, comprising: spraying a high-impact enamel composite glaze on the cable bridge, wherein the enamel composite glaze is composed of the following raw materials in parts by weight: 100 parts of SiO2, 15-20 parts of B2O3, 5-10 parts of Cr2O3, 15-25 parts of Al2O3, 1-4 parts of ZrO2, 1-5 parts of TiO2, 5-10 parts of Na2O, 3-7 parts of CoO, 2-4 parts of NiO, 3-5 parts of MnO, and 0.5-3 parts of graphene. The high-impact enamel composite cable bridge prepared by the present invention has excellent impact resistance; the outer enamel and the inner steel plate have good adhesion and are not easy to fall off; the enamel layer has high impact strength and is not easy to break.

Description

Technical Field

[0001] The invention belongs to the field of cable bridge technology molding, and in particular relates to a method for preparing a high-impact enamel composite cable bridge. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention, and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] Cable tray is a common power equipment, and enamel cable tray is a new type of cable tray with the advantages of excellent acid and alkali corrosion resistance and high strength.

[0004] Cable trays are mostly transported by trucks, and the transportation process is inevitably bumpy, which makes it easy for enameled cable trays to collide with each other, resulting in damage or loss of the enamel layer, affecting the appearance and corrosion resistance of the cable trays and reducing the service life of the cable trays. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a method for preparing a high-impact enamel composite cable tray. The high-impact enamel composite cable tray of the present invention has excellent impact resistance; the outer enamel and the inner steel plate have good adhesion and are not easy to fall off; the enamel layer has high impact strength and is not easy to be damaged.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] The first aspect of the present invention provides an enamel composite glaze for a high-impact enamel composite cable bridge, which is composed of the following raw materials in parts by weight: 100 parts of SiO2, 15-20 parts of B2O3, 5-10 parts of Cr2O3, 15-25 parts of Al2O3, 1-4 parts of ZrO2, 1-5 parts of TiO2, 5-10 parts of Na2O, 3-7 parts of CoO, 2-4 parts of NiO, 3-5 parts of MnO, and 0.5-3 parts of graphene.

[0008] In some embodiments, the material is composed of the following raw materials in parts by weight: 100 parts of SiO2, 15 to 20 parts of B2O3, 6 to 8 parts of Cr2O3, 15 to 25 parts of Al2O3, 1 to 4 parts of ZrO2, 2 to 5 parts of TiO2, 5 to 7 parts of Na2O, 3 to 6 parts of CoO, 2 to 4 parts of NiO, 3 to 5 parts of MnO, and 1 to 3 parts of graphene.

[0009] In some embodiments, the material is composed of the following raw materials in parts by weight: 100 parts of SiO2, 20 parts of B2O3, 6 to 8 parts of Cr2O3, 20 parts of Al2O3, 3 parts of ZrO2, 2 to 5 parts of TiO2, 5 to 7 parts of Na2O, 3 to 6 parts of CoO, 4 parts of NiO, 3 parts of MnO, and 1 to 3 parts of graphene.

[0010] The second aspect of the present invention provides a method for preparing a high-impact enamel composite glaze for a composite cable tray, comprising:

[0011] SiO2, B2O3, Cr2O3, Al2O3, ZrO2, TiO2, Na2O, CoO, NiO and MnO are mixed evenly, smelted to obtain enamel glaze particles, and then ball-milled to obtain enamel micropowder;

[0012] The graphene is evenly mixed with the enamel micropowder to obtain an enamel composite glaze.

[0013] In some embodiments, the smelting temperature is 750°C-850°C.

[0014] In some embodiments, the particle size of the enamel micropowder is 3-10 μm.

[0015] The third aspect of the present invention provides a method for preparing a high-impact enamel composite cable tray, comprising:

[0016] Fold the steel coil into the shape of a bridge frame and cut it into the required length to obtain a steel bridge frame;

[0017] The above-mentioned enamel composite glaze is sprayed on the steel cable tray frame, dried, sintered and cooled to obtain a high-impact enamel composite cable tray.

[0018] In some embodiments, the spraying is performed by electrostatic spraying;

[0019] In some embodiments, the spraying thickness is 0.2-0.3 mm.

[0020] In some embodiments, the sintering temperature is 600-700°C;

[0021] In some embodiments, the sintering time is 4-8 minutes.

[0022] More specifically, they include:

[0023] (1) preparing glaze: weighing the oxides in the raw materials of the enamel layer according to the formula, mixing them evenly with a stirrer, and then heating them to 750-850° C. for smelting for about 5 minutes to obtain enamel glaze particles, and then ball milling the enamel glaze particles with a ball mill to obtain enamel micropowder with a particle size of about 3-10 μm;

[0024] (2) preparing a composite enamel glaze: adding graphene to enamel micropowder according to a formula ratio and mixing evenly to obtain a composite enamel glaze;

[0025] (3) Making a steel bridge frame: Use a bending machine to fold the steel coil into the shape of a bridge frame and cut it into the required length;

[0026] (4) Using electrostatic spraying to evenly spray the enamel composite glaze onto the surface of the steel frame, with a spraying thickness of 0.2-0.3 mm;

[0027] (5) placing the steel bridge frame with the enamel composite glaze into a sintering furnace for drying and sintering, so that the glaze is melted and evenly bonded to the surface of the steel frame. The sintering temperature is 600-700° C. and the sintering time is 4-8 min.

[0028] (6) Take the enamel bridge out of the sintering furnace and cool it down.

[0029] A fourth aspect of the present invention provides a high-impact enamel composite cable tray prepared by the above method.

[0030] Beneficial effects of the present invention

[0031] (1) The inner layer of the bridge frame of the present invention adopts a steel frame and the outer layer adopts enamel, so that the bridge frame has excellent acid, alkali and salt corrosion resistance while meeting the requirements of a large span. The enamel glaze formula improves the adhesion between the enamel layer and the steel frame and the impact resistance of the enamel layer, making the enamel layer not easy to fall off or break.

[0032] (2) The enamel glaze formula of the present invention introduces cobalt oxide, which can effectively increase the adhesion between the enamel layer and the metal layer, making the enamel layer less likely to fall off; the introduction of titanium dioxide can make the structure of the enamel layer denser, so that it can better disperse the impact force when it is impacted; the introduction of chromium oxide and graphene can effectively resist cracks, thereby improving the toughness of the enamel layer.

[0033] (3) The preparation method of the present invention is simple, practical and easy to promote. DETAILED DESCRIPTION

[0034] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0035] The present invention will be further described in detail below in conjunction with specific embodiments. It should be noted that the specific embodiments are intended to explain the present invention rather than to limit it.

[0036] Example 1

[0037] The raw material composition of the enamel layer is shown in Table 1.

[0038] The specific preparation method of the enamel composite bridge is as follows:

[0039] (1) preparing glaze: weighing the oxides in the raw materials of the enamel layer according to the formula, mixing them evenly with a stirrer, and then heating them to 780° C. for 5 min to obtain enamel glaze particles, and then ball milling the enamel glaze particles with a ball mill to obtain enamel micropowder with a particle size of about 3-10 μm;

[0040] (2) preparing a composite enamel glaze: adding graphene to enamel micropowder according to a formula ratio and mixing evenly to obtain a composite enamel glaze;

[0041] (3) Making a steel bridge frame: Use a bending machine to fold the steel coil into the shape of a bridge frame and cut it into the required length;

[0042] (4) Using electrostatic spraying, the enamel composite glaze is evenly sprayed onto the surface of the steel frame, with a spraying thickness of 0.23 mm;

[0043] (5) placing the steel bridge frame with the enamel composite glaze into a sintering furnace for drying and sintering, so that the glaze is melted and evenly bonded to the surface of the steel frame. The sintering temperature is 650° C. and the sintering time is 5 min.

[0044] (6) Take the enamel bridge out of the sintering furnace and cool it down.

[0045] Example 2

[0046] The raw material composition of the enamel layer is shown in Table 1.

[0047] The specific preparation method of the enamel composite bridge is as follows:

[0048] (1) preparing glaze: weighing the oxides in the raw materials of the enamel layer according to the formula, mixing them evenly with a stirrer, and then heating them to 800° C. for 5 min to obtain enamel glaze particles, and then ball milling the enamel glaze particles with a ball mill to obtain enamel micropowder with a particle size of about 3-10 μm;

[0049] (2) preparing a composite enamel glaze: adding graphene to enamel micropowder according to a formula ratio and mixing evenly to obtain a composite enamel glaze;

[0050] (3) Making a steel bridge frame: Use a bending machine to fold the steel coil into the shape of a bridge frame and cut it into the required length;

[0051] (4) Using electrostatic spraying, the enamel composite glaze is evenly sprayed onto the surface of the steel frame, with a spraying thickness of 0.28 mm;

[0052] (5) placing the steel bridge frame with the enamel composite glaze into a sintering furnace for drying and sintering, so that the glaze is melted and evenly bonded to the surface of the steel frame. The sintering temperature is 680° C. and the sintering time is 6 min.

[0053] (6) Take the enamel bridge out of the sintering furnace and cool it down.

[0054] Example 3

[0055] The raw material composition of the enamel layer is shown in Table 1.

[0056] The specific preparation method of the enamel composite bridge is as follows:

[0057] (1) preparing glaze: weighing the oxides in the raw materials of the enamel layer according to the formula, mixing them evenly with a stirrer, and then heating them to 830° C. for 5 min to obtain enamel glaze particles, and then ball milling the enamel glaze particles with a ball mill to obtain enamel micropowder with a particle size of about 3-10 μm;

[0058] (2) preparing a composite enamel glaze: adding graphene to enamel micropowder according to a formula ratio and mixing evenly to obtain a composite enamel glaze;

[0059] (3) Making a steel bridge frame: Use a bending machine to fold the steel coil into the shape of a bridge frame and cut it into the required length;

[0060] (4) using electrostatic spraying to evenly spray the enamel composite glaze onto the surface of the steel frame, with a spraying thickness of 0.3 mm;

[0061] (5) placing the steel bridge frame with the enamel composite glaze into a sintering furnace for drying and sintering, so that the glaze is melted and evenly bonded to the surface of the steel frame. The sintering temperature is 680° C. and the sintering time is 8 min.

[0062] (6) Take the enamel bridge out of the sintering furnace and cool it down.

[0063] Comparative Examples 1-3

[0064] The preparation scheme of Example 1 was adopted, and the enameled composite cable tray was prepared according to the raw material composition given in Table 1.

[0065] Table 1 Raw material composition of enamel layer in Examples and Comparative Examples

[0066]

[0067]

[0068] The impact resistance test was carried out using the following method: the enamel bridge was supported at both ends with two wooden pads, the bottom of the product was kept at 30 mm above the ground, a steel ball with a diameter of 36 mm (mass of about 200 g) was dropped vertically from a height of 1500 mm, and the porcelain surface condition of the impacted part was observed. The experimental results are shown in Table 2.

[0069] Table 2 Impact test results of samples obtained from examples and comparative examples

[0070]

[0071] From the comparison between Example 1 and Comparative Example 1, it can be seen that the addition of CoO effectively increases the adhesion between the enamel layer and the metal layer and reduces the generation of cracks.

[0072] From the comparison between Example 1 and Comparative Example 2, it can be seen that the addition of TiO2 effectively reduces the generation of cracks.

[0073] From the comparison between Example 1 and Comparative Example 3, it can be seen that the addition of Cr2O3 and graphene can effectively resist cracks and improve the toughness of the enamel layer.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-impact enamel composite glaze for a composite cable tray, characterized in that: The invention is composed of the following raw materials in parts by weight: 100 parts of SiO2, 15-20 parts of B2O3, 5-10 parts of Cr2O3, 15-25 parts of Al2O3, 1-4 parts of ZrO2, 1-5 parts of TiO2, 5-10 parts of Na2O, 3-7 parts of CoO, 2-4 parts of NiO, 3-5 parts of MnO and 0.5-3 parts of graphene.

2. The high-impact enamel composite glaze for composite cable bridge according to claim 1, characterized in that: The invention is composed of the following raw materials in parts by weight: 100 parts of SiO2, 15-20 parts of B2O3, 6-8 parts of Cr2O3, 15-25 parts of Al2O3, 1-4 parts of ZrO2, 2-5 parts of TiO2, 5-7 parts of Na2O, 3-6 parts of CoO, 2-4 parts of NiO, 3-5 parts of MnO and 1-3 parts of graphene.

3. The enamel composite glaze for high impact enamel composite cable bridge according to claim 1, characterized in that: It is composed of the following raw materials in parts by weight: 100 parts of SiO2, 20 parts of B2O3, 6-8 parts of Cr2O3, 20 parts of Al2O3, 3 parts of ZrO2, 2-5 parts of TiO2, 5-7 parts of Na2O, 3-6 parts of CoO, 4 parts of NiO, 3 parts of MnO, and 1-3 parts of graphene.

4. A method for preparing a high-impact enamel composite glaze for a composite cable tray, characterized in that: include: SiO2, B2O3, Cr2O3, Al2O3, ZrO2, TiO2, Na2O, CoO, NiO and MnO are mixed evenly, smelted to obtain enamel glaze particles, and then ball-milled to obtain enamel micropowder; The graphene is evenly mixed with the enamel micropowder to obtain an enamel composite glaze.

5. The method for preparing the enamel composite glaze for high-impact enamel composite cable bridge according to claim 4, characterized in that: The smelting temperature is 750°C-850°C.

6. The method for preparing the enamel composite glaze for high-impact enamel composite cable bridge according to claim 4, characterized in that: The particle size of the enamel micropowder is 3-10 μm.

7. A method for preparing a high-impact enamel composite cable tray, characterized in that: include: Fold the steel coil into the shape of a bridge frame and cut it into the required length to obtain a steel bridge frame; The enamel composite glaze described in any one of claims 1 to 3 is sprayed on the steel cable tray skeleton, dried, sintered and cooled to obtain a high-impact enamel composite cable tray.

8. The method for preparing the high-impact enamel composite cable tray according to claim 7, characterized in that: The spraying is performed by electrostatic spraying; Or, the spraying thickness is 0.2-0.3 mm.

9. The method for preparing a high-impact enamel composite cable tray according to claim 7, characterized in that: The sintering temperature is 600-700°C; Or, the sintering time is 4-8 minutes.

10. A high-impact enamel composite cable tray prepared by the method according to any one of claims 7 to 9.

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