Anti-corrosion oil wood electric pole and preparation method thereof

Abstract

The invention relates to the technical field of oil-wood electric pole preparation, and provides an anti-corrosion oil-wood electric pole and a preparation method thereof. The preparation method of the anti-corrosion oil-wood electric pole comprises the following steps that the oil-wood electric pole is added into dipping oil, and after dipping, drying and polishing are conducted to obtain the anti-corrosion oil-wood electric pole; the impregnating oil comprises, by weight, 65-75 parts of white oil, 35-45 parts of anticorrosive oil, 10-15 parts of phenolic resin, 15-20 parts of flame retardant and 2-4 parts of auxiliaries, the phenolic resin is composed of first phenolic resin and second phenolic resin, and the first phenolic resin and the second phenolic resin are different in non-volatile substance content. By means of the technical scheme, the problem that in the related technology, the anti-corrosion performance of the oil-wood electric pole is insufficient is solved.

Description

Technical Field

[0001] This invention relates to the field of oil-coated wood pole manufacturing technology, specifically to a corrosion-resistant oil-coated wood pole and its manufacturing method. Background Technology

[0002] Oil-covered wood poles typically refer to utility poles made from tree species such as pine and fir. These trees have straight trunks, good corrosion resistance, and strength, making them indispensable materials for power facilities. They are widely distributed in forested areas and are a product of the intersection of nature and human civilization. In the field of power transmission, oil-covered wood poles play a crucial role and are an indispensable infrastructure component of the power system. Their main function is to support the power lines, ensuring a stable and continuous transmission of current.

[0003] In actual use, the buried portion of oil-coated wooden poles faces unique environmental conditions. This part of the pole is in contact with soil moisture, receives ample oxygen, and experiences suitable temperature conditions, making it a high-risk area for corrosion. Current technologies address this issue by employing methods such as injection and impregnation for corrosion protection, but the effectiveness of the applied anti-corrosion oils remains insufficient.

[0004] If the wood poles lack good corrosion resistance, the wood will gradually decay and its strength will decrease over time. This will not only severely shorten the lifespan of the poles and increase replacement and maintenance costs, but also pose a significant threat to the safety and stability of power transmission. Once the poles become unable to withstand the weight of the power lines and external wind loads due to corrosion, they may tilt or collapse, causing power outages, disrupting people's daily lives and production activities, and potentially leading to safety accidents, resulting in personal injury and property damage.

[0005] Therefore, it is necessary to propose a corrosion-resistant oil-coated wood pole and its preparation method. Summary of the Invention

[0006] This invention proposes a corrosion-resistant oil-coated wood pole and its preparation method, which solves the problem of insufficient corrosion resistance of oil-coated wood poles in related technologies.

[0007] The technical solution of the present invention is as follows: The present invention proposes a method for preparing an anti-corrosion oil-impregnated wooden pole, comprising the following steps: adding the oil-impregnated wooden pole to an impregnation oil, drying and polishing it after impregnation to obtain the anti-corrosion oil-impregnated wooden pole; the impregnation oil comprises the following components by weight: 65-75 parts white oil, 35-45 parts anti-corrosion oil, 10-15 parts phenolic resin, 15-20 parts flame retardant, and 2-4 parts additives, wherein the phenolic resin is composed of a first phenolic resin and a second phenolic resin, and the non-volatile substances content of the first phenolic resin and the second phenolic resin are different.

[0008] As a further technical solution, the impregnation is vacuum pressure impregnation, the vacuum pressure is 1 MPa, and the vacuum pressure time is 10 h.

[0009] As a further technical solution, the non-volatile substance content of the first phenolic resin is 61%, and the non-volatile substance content of the second phenolic resin is 84%.

[0010] As a further technical solution, the mass ratio of the first phenolic resin to the second phenolic resin is 2:3~4.

[0011] In the impregnation oil of the anti-corrosion oilwood pole of the present invention, the non-volatile substance content of the first phenolic resin is 61%, and the non-volatile substance content of the second phenolic resin is 84%. After the two are compounded, the small molecular chains of the low non-volatile resin and the long molecular chains of the high non-volatile resin can form a tight cross-linked network, reducing the micro-gaps in the resin layer after curing, reducing the intrusion channels of moisture, acid and alkali media and corrosive substances, and improving the anti-corrosion performance of the oilwood pole.

[0012] As a further technical solution, the anti-corrosion oil includes one or more of coal tar, pine tar, creosote oil, and anthracene oil, preferably anthracene oil.

[0013] The present invention relates to an anti-corrosion oiled wood pole, which incorporates preservative oil into its impregnation oil. The active ingredients in the preservative oil can directly act on harmful organisms such as decay fungi, molds, and woodworms inside and on the surface of the wood. By destroying their cell structure and inhibiting enzyme activity, it prevents microbial reproduction and wood degradation from the source. In addition, the preservative oil has excellent wettability and fluidity, and can work synergistically with white oil to reduce the overall viscosity of the impregnation oil. This facilitates its own and the phenolic resin compound system to penetrate more smoothly into the pores inside the wood, avoiding localized weak protection due to impeded penetration and improving the anti-corrosion performance of the oiled wood pole.

[0014] As a further technical solution, the additive is composed of a stabilizer, lauryl alcohol polyoxyethylene ether and sodium dodecylbenzene sulfonate in a mass ratio of 3:1:1.

[0015] This invention adds additives to the impregnation oil of the anti-corrosion wood pole. The stabilizer inhibits the oxidation and deterioration of the white oil and anti-corrosion oil, ensuring the impregnation oil maintains a uniform dispersion over a long period, avoiding fluctuations in the anti-corrosion effect due to component stratification and deterioration. Laureth polyoxyethylene ether has excellent emulsifying and penetration-promoting effects, reducing the surface tension of the impregnation oil, making it easier for the oil to wet the wood surface and quickly penetrate into the internal pores. Combined with white oil and phenolic resin, it further shortens the impregnation time and improves production efficiency. Sodium dodecylbenzenesulfonate has both hydrophilic and lipophilic groups, reducing the interfacial tension between different components in the impregnation oil, effectively dispersing flame retardant particles, preventing their aggregation and precipitation in the oil phase system, ensuring the flame retardant is uniformly distributed in the impregnation oil, and guaranteeing the overall stability of the impregnation oil's performance.

[0016] As a further technical solution, the stabilizer includes one or two of 2-tert-butyl-4-methoxyphenol and 2,6-di-tert-butyl-p-cresol, preferably 2,6-di-tert-butyl-p-cresol.

[0017] As a further technical solution, the flame retardant includes one or more of magnesium hydroxide, aluminum hydroxide, and zinc borate.

[0018] As a further technical solution, when the flame retardant is aluminum hydroxide, the aluminum hydroxide is a composite aluminum hydroxide, and the preparation method of the composite aluminum hydroxide includes the following steps: dispersing 4-aminophenol thiosulfate phosphate in a solvent, adding aluminum hydroxide, mixing and drying to obtain the composite aluminum hydroxide.

[0019] As a further technical solution, the mass ratio of the 4-aminophenol thiosulfate phosphate to the aluminum hydroxide is 4~5:50.

[0020] The aluminum hydroxide in the impregnation oil of the anti-corrosion oiled wood pole of this invention is a composite aluminum hydroxide. After treatment with 4-aminophenol thiosulfate phosphate, the amino groups in 4-aminophenol thiosulfate phosphate can combine with the hydroxyl groups on the surface of aluminum hydroxide, effectively solving the problem of easy agglomeration and uneven dispersion of aluminum hydroxide in the oil phase system. The composite aluminum hydroxide can be uniformly dispersed in the impregnation oil and penetrate into the wood along with other components, avoiding the phenomenon of strong flame retardancy in some areas and weak flame retardancy in others due to local aggregation of flame retardants, thus improving the flame retardant performance of the oiled wood pole.

[0021] As a further technical solution, the solvent is anhydrous ethanol.

[0022] As a further technical solution, the mass ratio of the solvent to the aluminum hydroxide is 4~7:1, for example, it can be 4:1, 5:1, 6:1, 7:1, preferably 5:1.

[0023] As a further technical solution, the mixing time is 2 to 5 hours, for example, it can be 2 hours, 2.5 hours, 3 hours, 3.5 hours, 4 hours, 4.5 hours, or 5 hours, preferably 3 hours.

[0024] The present invention also proposes a corrosion-resistant oil-coated wood pole, which is prepared by the aforementioned method for preparing a corrosion-resistant oil-coated wood pole.

[0025] The working principle and beneficial effects of this invention are as follows: In the impregnation oil of the anti-corrosion oiled wood pole of this invention, the phenolic resin is composed of a first phenolic resin and a second phenolic resin with different contents of non-volatile substances. The two work synergistically to improve the anti-corrosion performance of the oiled wood pole. The phenolic resin with a lower content of non-volatile substances has a lower viscosity and can quickly penetrate into the pores inside the wood with the impregnation oil, forming a preliminary anti-corrosion bonding layer on the cell wall. Although the phenolic resin with a higher content of non-volatile substances has a slower penetration rate, it can form a high-concentration resin film on the surface and shallow layers of the wood. The curing system formed by the combination of the two resins has both the permeability of low molecular weight resin and the stability of high molecular weight resin. In long-term outdoor use, it can resist the growth of decay fungi inside the wood through the deep resin layer and resist the erosion of ultraviolet rays and acid and alkali media through the high-stability resin layer on the surface, thus improving the anti-corrosion performance of the oiled wood pole. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] In the following examples and comparative examples: Aluminum hydroxide: average particle size is 2000 mesh; First phenolic resin: non-volatile substance content is 61%, model number is PR-51663, purchased from SBHPP (Sumitomo Bakelite Co., Ltd.). Second phenolic resin: non-volatile substance content is 84%, model number is PR-53365, purchased from SBHPP (Sumitomo Bakelite Co., Ltd.). White oil: Grade 3; Anthracene oil: purchased from Nanxing Chemical (Jiangsu) Co., Ltd.; Laureth polyoxyethylene ether: Model number M0A-9.

[0028] Example 1 A method for preparing a corrosion-resistant oil-impregnated wooden pole includes the following steps: adding the oil-impregnated wooden pole to impregnation oil, impregnating it under a pressure of 1 MPa for 10 hours, drying it, and polishing it to obtain the corrosion-resistant oil-impregnated wooden pole; The impregnation oil comprises the following raw materials in parts by weight: 65 parts white oil, 35 parts anthracene oil, 10 parts phenolic resin, 15 parts aluminum hydroxide, and 2 parts additives. The phenolic resin is composed of a first phenolic resin and a second phenolic resin in a mass ratio of 2:3. The additives consist of 2,6-di-tert-butyl-p-cresol, lauryl alcohol polyoxyethylene ether, and sodium dodecylbenzenesulfonate in a mass ratio of 3:1:1.

[0029] Example 2 A method for preparing a corrosion-resistant oil-impregnated wooden pole includes the following steps: adding the oil-impregnated wooden pole to impregnation oil, impregnating it under a pressure of 1 MPa for 10 hours, drying it, and polishing it to obtain the corrosion-resistant oil-impregnated wooden pole; The impregnation oil comprises the following raw materials in parts by weight: 70 parts white oil, 40 parts anthracene oil, 12 parts phenolic resin, 18 parts aluminum hydroxide, and 3 parts additives. The phenolic resin is composed of a first phenolic resin and a second phenolic resin in a mass ratio of 2:3. The additives consist of 2,6-di-tert-butyl-p-cresol, lauryl alcohol polyoxyethylene ether, and sodium dodecylbenzenesulfonate in a mass ratio of 3:1:1.

[0030] Example 3 A method for preparing a corrosion-resistant oil-impregnated wooden pole includes the following steps: adding the oil-impregnated wooden pole to impregnation oil, impregnating it under a pressure of 1 MPa for 10 hours, drying it, and polishing it to obtain the corrosion-resistant oil-impregnated wooden pole; The impregnation oil comprises the following raw materials in parts by weight: 75 parts white oil, 45 parts anthracene oil, 15 parts phenolic resin, 20 parts aluminum hydroxide, and 4 parts additives. The phenolic resin is composed of a first phenolic resin and a second phenolic resin in a mass ratio of 2:3. The additives consist of 2,6-di-tert-butyl-p-cresol, lauryl alcohol polyoxyethylene ether, and sodium dodecylbenzenesulfonate in a mass ratio of 3:1:1.

[0031] Example 4 The difference between Example 4 and Example 2 is that the phenolic resin is composed of a first phenolic resin and a second phenolic resin in a mass ratio of 1:2.

[0032] Example 5 Compared with Example 4, Example 5 differs in that the first phenolic resin (with a non-volatile content of 61%) is replaced with an equal amount of phenolic resin with a non-volatile content of 69%, model number 12704, purchased from SBHPP (Sumitomo Bakelite Corporation).

[0033] Example 6 The preparation method of composite aluminum hydroxide includes the following steps: 8 parts of 4-aminophenol thiosulfate phosphate are dispersed in 500 parts of anhydrous ethanol, 100 parts of aluminum hydroxide are added, and the mixture is dried after 3 hours to obtain composite aluminum hydroxide; The difference between Example 6 and Example 4 is that aluminum hydroxide is replaced with an equal amount of composite aluminum hydroxide prepared by the above preparation method.

[0034] Example 7 The difference between Example 7 and Example 6 is that the amount of 4-aminophenol thiosulfate phosphate added is 10 parts.

[0035] Comparative Example 1 The difference between Comparative Example 1 and Example 2 is that the phenolic resin is a first phenolic resin.

[0036] Comparative Example 2 The difference between Comparative Example 2 and Example 2 is that the phenolic resin is a second phenolic resin.

[0037] Comparative Example 3 Compared with Example 2, Comparative Example 3 differs in that the non-volatile content of the phenolic resin is 72.5%, the type is 33681, and it was purchased from SBHPP (Sumitomo Bakelite Corporation).

[0038] Experimental Example 1 The corrosion resistance of the anticorrosive oilwood poles prepared in Examples 1-5 and Comparative Examples 1-3 was tested according to the test methods specified in GB / T 13942.1-2009 "Durability of Wood Part 1: Laboratory Test Methods for Natural Corrosion Resistance". The wood mass loss rate was calculated after the test.

[0039] The test results are shown in Table 1: Table 1 Performance test results of the anti-corrosion oilwood poles prepared in Examples 1-5 and Comparative Examples 1-3

[0040] As shown in Table 1, when phenolic resin is composed of first phenolic resin and second phenolic resin with different contents of non-volatile substances, the corrosion resistance of anti-corrosion oilwood poles can be improved.

[0041] Experimental Example 2 For the anti-corrosion oilwood poles prepared in Examples 4 and 6-7, the oxygen index of the samples was tested according to the test methods specified in GB / T 2406.2-2009.

[0042] The test results are shown in Table 2: Table 2 Performance test results of the anti-corrosion oilwood poles prepared in Examples 4 and 6-7

[0043] As shown in Table 2, when the composite aluminum hydroxide prepared by compounding with 4-aminophenol thiosulfate phosphate is added as a flame retardant, the flame retardant performance of the anti-corrosion oilwood pole can be improved.

[0044] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for preparing a preservative oil-wood pole, characterized in that, The method comprises the following steps: The oil wood pole is added into the impregnation oil, and after impregnation, drying and polishing, the anti-corrosion oil wood pole is obtained; the impregnation oil comprises the following components by weight: 65-75 parts of white oil, 35-45 parts of anti-corrosion oil, 10-15 parts of phenolic resin, 15-20 parts of flame retardant, and 2-4 parts of auxiliary agent; the phenolic resin is composed of a first phenolic resin and a second phenolic resin, and the non-volatile matter contents of the first phenolic resin and the second phenolic resin are different.

2. A method of preparing a preservative oil-treated oak pole according to claim 1, characterized in that, The non-volatile matter content of the first phenolic resin is 61%, and the non-volatile matter content of the second phenolic resin is 84%.

3. The method of claim 1, wherein the oil-treated oak pole is prepared by the steps of: The mass ratio of the first phenolic resin to the second phenolic resin is 2:3-4. ​ 4. The method for preparing a preservative oil-wood pole according to claim 1, characterized in that, The anti-corrosion oil comprises one or more of coal tar, pine tar, creosote and anthracene oil.

5. The method of claim 1, wherein the oil-treated oak pole is prepared by the steps of: The auxiliary agent is composed of a stabilizer, lauryl alcohol polyoxyethylene ether and sodium dodecyl benzene sulfonate in a mass ratio of 3:1:

1. ​ 6. The method for preparing a preservative oil-wood pole according to claim 5, wherein, The stabilizer comprises one or both of 2-tert-butyl-4-methoxyphenol and 2,6-di-tert-butyl-p-cresol.

7. The method of claim 1, wherein the oil-treated oak pole is prepared by the steps of: The flame retardant comprises one or more of magnesium hydroxide, aluminum hydroxide and zinc borate. ​ 8. The method for preparing a preservative oil-wood pole according to claim 7, characterized in that, When the flame retardant is aluminum hydroxide, the aluminum hydroxide is a composite aluminum hydroxide, and the preparation method of the composite aluminum hydroxide comprises the following steps: dispersing 4-aminophenol phosphoric acid thiosulfate in a solvent, adding aluminum hydroxide, mixing and drying to obtain the composite aluminum hydroxide.

9. The method for preparing a corrosion-resistant oil-paper utility pole according to claim 8, characterized in that, The mass ratio of the 4-aminophenol phosphoric acid thiosulfate to the aluminum hydroxide is 4-5:

50.

10. A preservative oil-wood pole characterized in that, Prepared by the method of any one of claims 1-9.

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