CN112562944A - Selective coating method suitable for hardware surface coating in strong wind and sand area - Google Patents
Selective coating method suitable for hardware surface coating in strong wind and sand area Download PDFInfo
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- CN112562944A CN112562944A CN202011460277.4A CN202011460277A CN112562944A CN 112562944 A CN112562944 A CN 112562944A CN 202011460277 A CN202011460277 A CN 202011460277A CN 112562944 A CN112562944 A CN 112562944A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
- H01B19/04—Treating the surfaces, e.g. applying coatings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
- H01B19/02—Drying; Impregnating
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Abstract
The invention discloses a selective coating method suitable for a hardware surface coating in a strong wind and sand area, which comprises the following steps: (1) cleaning a hardware fitting sample; (2) preparing a zirconia sol-gel solution; (3) selectively coating zirconia sol gel on the surface of the pretreated hardware fitting sample; (4) sintering the processed hardware sample; (5) the coating on the surface of the sample was observed. Compared with the prior art, the invention systematically describes the selective coating method suitable for the hardware surface coating in the strong wind and sand area for the first time, which is beneficial to reducing the large-scale shedding of the internal coating of the hardware under the action of shaking the cable by wind power and prolonging the service life of the hardware.
Description
Technical Field
The invention belongs to the field of electrical engineering, and particularly relates to a selective coating method suitable for a hardware surface coating in a strong wind and sand area.
Background
The extreme environment in China is most typical of desert environment, high and cold environment and geological fragile environment. In the desert environment, the influence of wind and sand on the whole power transmission line is the largest, and the safe operation of the power transmission line is influenced. In the failure of power equipment in an area, hardware wear is particularly serious. Once the hardware is worn and then broken, the influence and the damage on the whole power transmission line are very serious, and the power supply safety of the whole power transmission line is influenced. In strong wind sand area, the electric wire can carry out certain swing along with the wind direction, and after there is the crack on even coating surface, the crack can expand gradually, leads to the coating to drop, fails the life of fine extension gold utensil, has great influence to whole transmission line.
At present, the test of the coating selecting method which is suitable for the hardware surface coating in the strong wind sand area is less internationally. Northwest electric power is to spray the coating of resisting sand and dust storm and preventing pollution flashover coating (ASSRTV) to the surface of bushing and post insulator of the capacitor selectively, do not protect the hardware fitting and propose a series of methods to strengthen the service life of the hardware fitting; the national grid Sinkiang electric power company electric power science research institute only puts forward a series of design specifications of the power transmission line in the strong wind and sand area; in the research of Beijing university of transportation, a wear-resistant functionally graded piezoelectric material is designed, and the problem of selective coating of hardware wear-resistant coatings is still not related too much. Through a series of researches, the current research environment does not involve too much selection and coating methods for the surface coating of the hardware in the strong wind and sand area basically, and has not attracted wide attention in the industry. Therefore, certain research and measurement are carried out on the wind direction of the strong wind sand area, and the thickness degree of the coating on the surface of the hardware fitting is ensured to effectively prolong the service life of the hardware fitting.
Disclosure of Invention
The invention aims to provide a selective coating method for a hardware fitting surface coating in a strong wind and sand area, which reduces the expansion of cracks, reduces the falling of the coating and prolongs the service life of the hardware fitting by researching a non-uniform coating. The problem that in a strong wind and sand area, a high-voltage line can swing violently along with the wind direction, the coating can be abraded by violent friction between an electric wire and a hardware fitting, and abrasion cracks can expand to cause the coating to fall off in a large number and the coating loses the effect of protecting the hardware fitting is solved. .
In order to achieve the purpose, the invention adopts the technical scheme that:
a selective coating method suitable for a hardware surface coating in a strong wind and sand area comprises the following steps:
(1) cleaning a hardware fitting sample;
(2) preparing a zirconia sol-gel solution;
(3) selectively coating zirconia sol gel on the surface of the pretreated hardware fitting sample;
(4) sintering the processed hardware sample;
(5) the coating on the surface of the sample was observed.
Preferably, the specific test process of step (1) is as follows: preparing dilute hydrochloric acid with a certain ratio of 1:4, immersing the hardware sample in the dilute hydrochloric acid, performing ultrasonic treatment in a super-living machine until the surface of the hardware is smooth and free of rust marks, cleaning the hardware in the ultrasonic machine for 3-5 times by using ultrapure water, and drying.
Preferably, the specific test process of step (2) is as follows: preparing solution of zirconium n-butyl alcohol and absolute ethyl alcohol in a clean sealed beaker according to the proportion of 1:4, stirring the solution on a magnetic stirrer for about 30min at normal temperature until the zirconium n-butyl alcohol and the absolute ethyl alcohol are completely mixed, standing the mixture for more than 12h for reaction, and sticking a label.
Preferably, the specific test process of step (3) is as follows:
(a) immersing a groove part at the bottom of the hardware in the prepared zirconia sol-gel solution for about 3-5 minutes, uniformly extracting the hardware according to 4cm/min, and drying in an oven at 60 ℃ for about 10 minutes.
(b) And cooling the dried hardware to normal temperature, immersing the left part of the hardware groove in the zirconia sol-gel solution according to the wind direction and the swinging position of the electric wire in the hardware, immersing for about 3-5 minutes, extracting the hardware at a constant speed of 4cm/min, and drying in an oven at 60 ℃.
(c) And cooling the dried hardware to normal temperature, immersing the right part of the hardware groove in the zirconia sol-gel solution according to the wind direction and the swinging position of the electric wire in the hardware, immersing for about 3-5 minutes, extracting the hardware at a constant speed of 4cm/min, and drying in an oven at 60 ℃.
(d) Repeating the processes of (b) and (c) for 3 times, and thickening the coatings on two side parts of the groove.
Preferably, the specific test process of step (4) is as follows: and (3) placing the hardware with the coating formed on the surface of the hardware in an energy-saving box type electric furnace for sintering, wherein the sintering is carried out at 500 ℃ for 60min, and the annealing speed is about 5 ℃/min.
Preferably, the specific test process of the step (5) is as follows: and taking out the sintered hardware fitting, and cooling to normal temperature to finish the selective coating of the surface coating of the hardware fitting.
The invention has the following beneficial effects:
(a) the hydrochloric acid can quickly treat impurities such as rust and the like on the surface of the hardware fitting, so that the surface of the hardware fitting is smoother;
(b) the coating is prepared by a sol-gel method, and the preparation method is relatively convenient and simple;
(c) the formed coating can be more compact at the sintering temperature of 500 ℃, and the coating is not easy to fall off on the surface of the hardware fitting;
(d) the main bearing of electric wire is in gold utensil recess bottom, can want both sides slope swing according to wind-force, so the groove part is thinner, and both sides part is thicker, and the coating is difficult for droing from the gold utensil surface when the electric wire rocks, strengthens the life of gold utensil.
(e) The method is simple, has reliable results, can be applied to the selective coating of hardware fittings in the strong wind and sand areas, and can also be popularized and applied to the selective coating preparation of wear-resistant coatings of power equipment in other areas.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
FIG. 2 is a result diagram of the state of the coating of the hardware of the present invention.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a selective coating method for the surface coating of the hardware, and the embodiment includes the following steps in the following order:
(1) cleaning a hardware fitting sample;
(2) preparing a zirconia sol-gel solution;
(3) selectively coating zirconia sol gel on the surface of the pretreated hardware fitting sample;
(4) sintering the processed hardware sample;
(5) the coating on the surface of the sample was observed.
In step (1) of this embodiment, the rust on the surface of the metal tool needs to be cleaned up with hydrochloric acid to perform subsequent experiments, and the hydrochloric acid also needs to be cleaned up after the rust is cleaned up, so that if residual acid and rust exist, the sintering of subsequent coatings can be affected to a certain extent. The test process of the step (1) is to prepare dilute hydrochloric acid with a certain ratio of 1:4, immerse the hardware sample in the dilute hydrochloric acid, perform ultrasonic treatment in a supersonic machine until the surface of the hardware is smooth and has no rust mark, clean the hardware in the supersonic machine for 3-5 times by using ultrapure water, and dry the hardware. The rust on the surface of the hardware fitting can be cleaned by hydrochloric acid for subsequent experiments, the hydrochloric acid also needs to be cleaned after the rust is cleaned, and if residual acid and rust exist, the subsequent coating sintering is influenced to a certain extent.
In the step (2) of this embodiment, n-butyl zirconium and absolute ethyl alcohol are prepared into a solution in a clean sealed beaker according to a ratio of 1:4, the solution is stirred on a magnetic stirrer for about 30min at normal temperature until the n-butyl zirconium and the absolute ethyl alcohol are completely mixed, the solution is kept stand for more than 12h for reaction, the prepared zirconia sol-gel solution is light yellow and transparent, the solution is volatile, the solution needs to be sealed in time when the solution is reacted and not used, and a label is pasted.
The test procedure of step (3) in this example is as follows:
1) immersing a groove part at the bottom of the hardware in the prepared zirconia sol-gel solution for about 3-5 minutes, uniformly extracting the hardware according to 4cm/min, and drying in an oven at 60 ℃ for about 10 minutes.
2) And cooling the dried hardware to normal temperature, immersing the left part of the hardware groove in the zirconia sol-gel solution according to the wind direction and the swinging position of the electric wire in the hardware, immersing for about 3-5 minutes, extracting the hardware at a constant speed of 4cm/min, and drying in an oven at 60 ℃.
3) And cooling the dried hardware to normal temperature, immersing the right part of the hardware groove in the zirconia sol-gel solution according to the wind direction and the swinging position of the electric wire in the hardware, immersing for about 3-5 minutes, extracting the hardware at a constant speed of 4cm/min, and drying in an oven at 60 ℃.
4) And (3) repeating the processes of (2) and (3) for 3 times, and thickening the coatings at two side parts of the groove.
In the test process of the step (4) in this embodiment, the hardware with the coating formed on the surface thereof is placed in an energy-saving box type electric furnace and sintered at 500 ℃ for 60min, and the annealing speed is about 5 ℃/min.
In the test process in step (5) of this embodiment, the sintered hardware is taken out, and is cooled to normal temperature, so as to complete the selective coating of the coating on the surface of the hardware, and the presented coating state is shown in fig. 2. Wherein the dotted portion in the groove is the coating.
From the results, the test finally forms a compact coating on the inner layer of the hardware, wherein the coating in the groove is thinner and is about 50-150 μm, and the coatings on two sides of the groove are thicker and are about 300-500 μm. The coating formed by the selective coating mode can effectively prevent the cracks from expanding to cause the falling of a large number of coatings when the cable shakes in the hardware under the action of wind power and the like, plays the role of the coating and prolongs the service life of the hardware.
The above embodiments are merely preferred illustrations of the present invention, and do not constitute limitations on the scope of the invention, and all designs identical or similar to the present invention are within the scope of the invention. It should be noted that any person skilled in the art can, without departing from the scope of the invention, modify and decorate the above-described method to obtain an equivalent embodiment, and still fall within the scope of the invention.
Those not described in detail in this specification are within the knowledge of those skilled in the art.
Claims (7)
1. A selective coating method suitable for a hardware surface coating in a strong wind and sand area is characterized by comprising the following steps:
(1) cleaning a hardware fitting sample;
(2) preparing a zirconia sol-gel solution;
(3) selectively coating zirconia sol gel on the surface of the pretreated hardware fitting sample;
(4) sintering the processed hardware sample;
(5) the coating on the surface of the sample was observed.
2. The method for selectively coating the surface coating of the hardware suitable for the strong wind sand area according to claim 1, wherein the specific test process of the step (1) is as follows: preparing dilute hydrochloric acid, immersing the hardware sample in the dilute hydrochloric acid, performing ultrasonic treatment in an ultrasonic machine until the surface of the hardware is smooth and has no rust mark, cleaning the hardware in the ultrasonic machine by using ultrapure water, and drying.
3. The selective coating method for the hardware surface coating in the strong wind and sand area according to claim 2, wherein the ratio of the prepared diluted hydrochloric acid is 1:4, and the number of times of cleaning with ultrapure water in an ultrasonic machine is 3-5.
4. The method for selectively coating the surface coating of the hardware fitting suitable for the area with strong wind and sand according to claim 1, wherein the specific test process of the step (2) is as follows: preparing solution of zirconium n-butyl alcohol and absolute ethyl alcohol in a clean sealed beaker according to the proportion of 1:4, stirring the solution for 30min on a magnetic stirrer at normal temperature until the zirconium n-butyl alcohol and the absolute ethyl alcohol are completely mixed, standing the mixture for more than 12h for reaction, and sticking a label.
5. The method for selectively coating the surface coating of the hardware suitable for the strong wind sand area according to claim 1, wherein the specific test process of the step (3) is as follows: (a) immersing a groove part at the bottom of the hardware in the prepared zirconia sol-gel solution for about 3-5 minutes, uniformly extracting the hardware according to 4cm/min, and drying in an oven at 60 ℃ for about 10 minutes.
(b) And cooling the dried hardware to normal temperature, immersing the left part of the hardware groove in the zirconia sol-gel solution according to the wind direction and the swinging position of the electric wire in the hardware, immersing for about 3-5 minutes, extracting the hardware at a constant speed of 4cm/min, and drying in an oven at 60 ℃.
(c) And cooling the dried hardware to normal temperature, immersing the right part of the hardware groove in the zirconia sol-gel solution according to the wind direction and the swinging position of the electric wire in the hardware, immersing for about 3-5 minutes, extracting the hardware at a constant speed of 4cm/min, and drying in an oven at 60 ℃.
(d) Repeating the processes of (b) and (c) for 3 times, and thickening the coatings on two side parts of the groove.
6. The method for selectively coating the surface coating of the hardware suitable for the strong wind sand area according to the claim 1, wherein the test conditions of the step (4) are as follows: and (3) placing the hardware with the coating formed on the surface of the hardware in an energy-saving box type electric furnace for sintering, wherein the sintering is carried out at 500 ℃ for 60min, and the annealing speed is about 5 ℃/min.
7. The method for selectively coating the surface coating of the hardware suitable for the area with strong wind and sand according to claim 1, wherein the specific process of the step (5) is as follows: and taking out the sintered hardware fitting, and cooling to normal temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011460277.4A CN112562944A (en) | 2020-12-11 | 2020-12-11 | Selective coating method suitable for hardware surface coating in strong wind and sand area |
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| CN202011460277.4A CN112562944A (en) | 2020-12-11 | 2020-12-11 | Selective coating method suitable for hardware surface coating in strong wind and sand area |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1676936A2 (en) * | 2004-12-30 | 2006-07-05 | General Electric Company | Improved dielectric coating for surfaces exposed to high temperature water |
| CN1875127A (en) * | 2003-12-05 | 2006-12-06 | 山特维克知识产权股份有限公司 | A steel strip coated with zirconia |
| JP2018006077A (en) * | 2016-06-29 | 2018-01-11 | 京セラ株式会社 | Tension resistant glass component |
| CN207781295U (en) * | 2018-01-19 | 2018-08-28 | 江西正强电瓷电器有限公司 | A kind of ceramic insulator for high voltage |
| CN108483492A (en) * | 2018-04-18 | 2018-09-04 | 南京工业大学 | Preparation method of zirconia aerogel |
| CN110573656A (en) * | 2016-12-22 | 2019-12-13 | 法国电力公司 | Sol-gel process for producing corrosion-resistant coatings on metal substrates |
| CN210956304U (en) * | 2019-12-28 | 2020-07-07 | 江西平高电器有限公司 | Insulator with good wear-resisting effect |
-
2020
- 2020-12-11 CN CN202011460277.4A patent/CN112562944A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1875127A (en) * | 2003-12-05 | 2006-12-06 | 山特维克知识产权股份有限公司 | A steel strip coated with zirconia |
| EP1676936A2 (en) * | 2004-12-30 | 2006-07-05 | General Electric Company | Improved dielectric coating for surfaces exposed to high temperature water |
| JP2018006077A (en) * | 2016-06-29 | 2018-01-11 | 京セラ株式会社 | Tension resistant glass component |
| CN110573656A (en) * | 2016-12-22 | 2019-12-13 | 法国电力公司 | Sol-gel process for producing corrosion-resistant coatings on metal substrates |
| CN207781295U (en) * | 2018-01-19 | 2018-08-28 | 江西正强电瓷电器有限公司 | A kind of ceramic insulator for high voltage |
| CN108483492A (en) * | 2018-04-18 | 2018-09-04 | 南京工业大学 | Preparation method of zirconia aerogel |
| CN210956304U (en) * | 2019-12-28 | 2020-07-07 | 江西平高电器有限公司 | Insulator with good wear-resisting effect |
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