A steel box column processing method

Abstract

The present application relates to the technical field of steel structure processing, in particular to a steel box column processing method, the method provided by the present application takes the material used for box column, welds according to the design, pretreats the welded steel box column, sprays the rust-proof liquid on the pretreated steel box column, completes the processing of the steel box column, greatly improves the first-time acceptance qualification rate of the provided steel box column, reduces the rework rate, saves the cost, at the same time, through the provided rust-proof liquid, the provided steel box column has excellent rust-proof effect, prolongs the service life of the provided steel box column.

Description

Technical Field

[0001] This invention relates to the field of steel structure processing technology, specifically to a method for processing steel box-shaped columns. Background Technology

[0002] Steel structures are structures made of steel materials and are one of the main types of building structures. The structure mainly consists of steel beams, steel columns, steel trusses, and other components made of shaped steel and steel plates, and employs rust removal and prevention processes. The components are typically connected by welds, bolts, or rivets. Due to its light weight and simple construction, it is widely used in large factories, stadiums, and high-rise buildings. Steel structures are prone to corrosion; generally, they require rust removal, galvanizing, or painting, and regular maintenance. Box columns, named for their shape resembling a large iron box, are generally used as beams or columns in steel structures.

[0003] Patent application number CN202010346319.5 describes in its specification that "a thin-walled box column is formed by a lower flange plate, an upper flange plate, and two web plates forming a rectangular frame. An inner partition plate is provided inside the rectangular frame. The upper flange plate is composed of a main upper flange plate and two side upper flange plates. The processing method includes the following steps: pre-cutting a bevel at the top of the inner partition plate; welding the inner partition plate, the two web plates, and the lower flange plate; welding a first welding backing plate to the top of the inner partition plate on the back side of the bevel, such that after welding, the top of the first welding backing plate is higher than the top of the inner partition plate." The upper flange main plate is welded to the top of the two web plates. The inner partition plate and the top of the first welded liner plate are welded to the upper flange main plate using a bevel welding method. Second welded liner plates are welded to the bottom of both the front and rear ends of the upper flange main plate. Then, the two upper flange side plates are welded to the front and rear ends of the upper flange main plate, respectively. The advantages of this invention are: "This processing method is simple and convenient to operate, and has low production costs." The processing method provided by the aforementioned patent only enables the welding of box-shaped columns; however, the provided box-shaped column processing method lacks the effect of improving the rust resistance of the box-shaped column and cannot meet the usage requirements.

[0004] In conclusion, developing a processing method for steel box-shaped columns is a critical issue that urgently needs to be addressed in the field of steel structure processing technology. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a method for processing steel box columns. The method provided by the present invention greatly improves the first-pass yield, reduces the rework rate, and saves costs. At the same time, the provided rust-preventive liquid enables the provided steel box columns to have excellent rust prevention effect and extend the service life of the provided steel box columns.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a method for processing steel box-type columns, comprising the following steps: (1) Take the materials used to make the box-shaped column, and weld them according to the design to obtain the welded steel box-shaped column; (2) Pre-treatment of the welded steel box-shaped columns; (3) Spray anti-rust liquid on the pretreated steel box column to complete the processing of the steel box column; The rust inhibitor comprises the following raw materials in parts by weight: 30-40 parts of anthranilic acid, 10-12 parts of hexamethylenetetramine, 4-6 parts of dispersant, 2-4 parts of film-forming agent, 2-5 parts of defoamer, and 60-80 parts of deionized water. The method for preparing the rust inhibitor includes the following steps: Weigh out deionized water and place it in the first stirred tank. Add dispersant to the first stirred tank and stir to mix to obtain the first mixture. The first mixture is transferred to the second stirred tank and heated to 60-70°C. Then, o-aminobenzoic acid, hexamethylenetetramine, and a film-forming agent are added to the second stirred tank and stirred until homogeneous to obtain the second mixture. The second mixture is cooled to 40-42℃, and then a defoamer is added to the second stirring vessel to obtain a rust-preventive liquid.

[0007] The present invention is further configured such that, in step (1), the material used to manufacture the box-shaped column is taken and welded according to the design, including the following steps: Fix the lower flange plate to the assembly platform and draw the assembly guideline on the lower flange plate; Weld two web plates onto the lower flange plate according to the assembly guideline; Then weld a diaphragm located between the two webs onto the lower flange plate; Flange plates are welded onto the two web plates to obtain a steel box column.

[0008] The present invention is further configured such that, in step (2), the preprocessing process is as follows: Remove oxide scale from the weld seam area and the outer surface of the steel box column; Then, use 200-grit, 500-grit, and 800-grit sandpaper to polish the steel box-shaped column in sequence; Rinse the polished steel box column with water 3-4 times, wipe it with a towel, and let it air dry naturally.

[0009] The present invention is further configured such that the film-forming agent is any one of propylene glycol butyl ether, hexanediol butyl ether acetate, or tripropylene glycol n-butyl ether.

[0010] A further feature of the present invention is that the dispersant is either ethylenediaminetetraacetic acid or vinyl bis-stearamide.

[0011] A further feature of this invention is that the defoamer is either dimethyl silicone oil or polyoxyethylene ether.

[0012] A further feature of this invention is that, in the method for preparing the rust inhibitor, the stirring speed of the first stirring vessel is 300-400 r / min, and the stirring time is 20-30 min.

[0013] A further feature of this invention is that, in the method for preparing the rust inhibitor, the stirring speed of the second stirring vessel is 520-530 r / min, and the stirring time is 12-15 min. Beneficial effects

[0014] Compared with known public technologies, the technical solution provided by this invention has the following beneficial effects: The method provided by this invention involves taking the materials used to manufacture the box-type columns, welding them according to the design, pre-treating the welded steel box-type columns, and spraying rust-preventive liquid onto the pre-treated steel box-type columns to complete the processing of the steel box-type columns. This greatly improves the first-time acceptance rate of the provided steel box-type columns, reduces rework rate, and saves costs. At the same time, the provided rust-preventive liquid enables the provided steel box-type columns to have excellent rust prevention effect, extending the service life of the provided steel box-type columns. Attached Figure Description

[0015] Figure 1 This is a flowchart of a steel box-shaped column processing method according to the present invention. Detailed Implementation

[0016] 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 clearly and completely described below. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0017] The present invention will be further described below with reference to embodiments. Example

[0018] This invention provides a method for processing steel box-type columns, comprising the following steps: (1) Take the materials used to make the box column and weld them according to the design to obtain the welded steel box column.

[0019] Furthermore, the materials used to fabricate the box-shaped columns are obtained and welded according to the design, including the following steps: Fix the lower flange plate to the assembly platform and draw the assembly guideline on the lower flange plate; Weld two web plates onto the lower flange plate according to the assembly guideline; Then weld a diaphragm located between the two webs onto the lower flange plate; Flange plates are welded onto the two web plates to obtain a steel box column.

[0020] In this step, it should be noted that before assembly, the part numbers, materials, dimensions, quantities, and machining accuracy of the parts to be assembled must be checked to ensure they meet the requirements of the drawings and processes. Assembly can only proceed after confirmation.

[0021] The partition welding adopts CO2 gas shielded welding with low heat output. The two partitions and the web can also be temporarily supported by round tubes for constraint and fixation to prevent the partitions from shifting due to welding shrinkage deformation, which would cause the box column section to shrink and deform.

[0022] (2) Pre-treatment of the welded steel box column.

[0023] Furthermore, the preprocessing process is as follows: Remove oxide scale from the weld seam area and the outer surface of the steel box column; Then, use 200-grit, 500-grit, and 800-grit sandpaper to polish the steel box-shaped column in sequence; Rinse the polished steel box column three times with water, wipe it with a towel, and let it air dry naturally.

[0024] In this embodiment, it should be noted that by pre-treating the welded steel box column, the adhesion between the rust inhibitor and the steel box column is enhanced when the rust inhibitor is sprayed.

[0025] (3) Spray anti-rust liquid on the pretreated steel box column to complete the processing of the steel box column.

[0026] The rust inhibitor comprises the following raw materials in parts by weight: 30 parts of anthranilic acid, 10 parts of hexamethylenetetramine, 4 parts of dispersant, 2 parts of film-forming agent, 2 parts of defoamer, and 60 parts of deionized water. The method for preparing the rust inhibitor includes the following steps: Weigh out deionized water and place it in the first stirred tank. Add dispersant to the first stirred tank and stir to mix to obtain the first mixture. The first mixture was transferred to the second stirred tank and heated to 60°C. Then, o-aminobenzoic acid, hexamethylenetetramine, and a film-forming agent were added to the second stirred tank and stirred until homogeneous to obtain the second mixture. The second mixture is cooled to 40°C, and then an antifoaming agent is added to the second stirring vessel to obtain the rust-preventive liquid.

[0027] Furthermore, the film-forming agent is propylene glycol butyl ether.

[0028] Furthermore, the dispersant is ethylenediaminetetraacetic acid.

[0029] Furthermore, the defoamer is dimethyl silicone oil.

[0030] Furthermore, in the preparation method of the rust inhibitor, the stirring speed of the first stirring vessel is 300 r / min, and the stirring time is 20 min.

[0031] Furthermore, in the preparation method of the rust inhibitor, the stirring speed of the second stirring vessel is 520 r / min, and the stirring time is 12 min.

[0032] In this embodiment, it should be noted that spraying the prepared rust inhibitor onto the steel box column can effectively improve the rust prevention effect of the steel box column. After the rust inhibitor was sprayed, the steel box column was exposed to the outdoors for 30 days and no rust appeared. Example

[0033] This invention provides a method for processing steel box-type columns, comprising the following steps: (1) Take the materials used to make the box column and weld them according to the design to obtain the welded steel box column.

[0034] Furthermore, the materials used to fabricate the box-shaped columns are obtained and welded according to the design, including the following steps: Fix the lower flange plate to the assembly platform and draw the assembly guideline on the lower flange plate; Weld two web plates onto the lower flange plate according to the assembly guideline; Then weld a diaphragm located between the two webs onto the lower flange plate; Flange plates are welded onto the two web plates to obtain a steel box column.

[0035] In this step, it should be noted that before assembly, the part numbers, materials, dimensions, quantities, and machining accuracy of the parts to be assembled must be checked to ensure they meet the requirements of the drawings and processes. Assembly can only proceed after confirmation.

[0036] The partition welding adopts CO2 gas shielded welding with low heat output. The two partitions and the web can also be temporarily supported by round tubes for constraint and fixation to prevent the partitions from shifting due to welding shrinkage deformation, which would cause the box column section to shrink and deform.

[0037] (2) Pre-treatment of the welded steel box column.

[0038] Furthermore, the preprocessing process is as follows: Remove oxide scale from the weld seam area and the outer surface of the steel box column; Then, use 200-grit, 500-grit, and 800-grit sandpaper to polish the steel box-shaped column in sequence; Rinse the polished steel box column with water four times, wipe it with a towel, and let it air dry naturally.

[0039] In this embodiment, it should be noted that by pre-treating the welded steel box column, the adhesion between the rust inhibitor and the steel box column is enhanced when the rust inhibitor is sprayed.

[0040] (3) Spray anti-rust liquid on the pretreated steel box column to complete the processing of the steel box column.

[0041] The rust inhibitor described herein comprises the following raw materials in parts by weight: 35 parts of anthranilic acid, 11 parts of hexamethylenetetramine, 5 parts of dispersant, 3 parts of film-forming agent, 3 parts of defoamer, and 70 parts of deionized water. The method for preparing the rust inhibitor includes the following steps: Weigh out deionized water and place it in the first stirred tank. Add dispersant to the first stirred tank and stir to mix to obtain the first mixture. The first mixture was transferred to the second stirred tank and heated to 65°C. Then, o-aminobenzoic acid, hexamethylenetetramine, and a film-forming agent were added to the second stirred tank and stirred until homogeneous to obtain the second mixture. The second mixture was cooled to 41°C, and then an antifoaming agent was added to the second stirring vessel to obtain the rust-preventive liquid.

[0042] Furthermore, the film-forming agent is hexanediol butyl ether acetate.

[0043] Furthermore, the dispersant is vinyl bis-stearamide.

[0044] Furthermore, the defoamer is polyoxyethylene ether.

[0045] Furthermore, in the preparation method of the rust inhibitor, the stirring speed of the first stirring vessel is 350 r / min, and the stirring time is 25 min.

[0046] Furthermore, in the preparation method of the rust inhibitor, the stirring speed of the second stirring vessel is 525 r / min, and the stirring time is 13 min.

[0047] In this embodiment, it should be noted that spraying the prepared rust inhibitor onto the steel box column can effectively improve the rust prevention effect of the steel box column. After the rust inhibitor was sprayed, the steel box column was exposed to the outdoors for 30 days and no rust appeared. Example

[0048] This invention provides a method for processing steel box-type columns, comprising the following steps: (1) Take the materials used to make the box column and weld them according to the design to obtain the welded steel box column.

[0049] Furthermore, the materials used to fabricate the box-shaped columns are obtained and welded according to the design, including the following steps: Fix the lower flange plate to the assembly platform and draw the assembly guideline on the lower flange plate; Weld two web plates onto the lower flange plate according to the assembly guideline; Then weld a diaphragm located between the two webs onto the lower flange plate; Flange plates are welded onto the two web plates to obtain a steel box column.

[0050] In this step, it should be noted that before assembly, the part numbers, materials, dimensions, quantities, and machining accuracy of the parts to be assembled must be checked to ensure they meet the requirements of the drawings and processes. Assembly can only proceed after confirmation.

[0051] The partition welding adopts CO2 gas shielded welding with low heat output. The two partitions and the web can also be temporarily supported by round tubes for constraint and fixation to prevent the partitions from shifting due to welding shrinkage deformation, which would cause the box column section to shrink and deform.

[0052] (2) Pre-treatment of the welded steel box column.

[0053] Furthermore, the preprocessing process is as follows: Remove oxide scale from the weld seam area and the outer surface of the steel box column; Then, use 200-grit, 500-grit, and 800-grit sandpaper to polish the steel box-shaped column in sequence; Rinse the polished steel box column with water four times, wipe it with a towel, and let it air dry naturally.

[0054] In this embodiment, it should be noted that by pre-treating the welded steel box column, the adhesion between the rust inhibitor and the steel box column is enhanced when the rust inhibitor is sprayed.

[0055] (3) Spray anti-rust liquid on the pretreated steel box column to complete the processing of the steel box column.

[0056] The rust inhibitor comprises the following raw materials in parts by weight: 40 parts of anthranilic acid, 12 parts of hexamethylenetetramine, 6 parts of dispersant, 4 parts of film-forming agent, 5 parts of defoamer, and 80 parts of deionized water. The method for preparing the rust inhibitor includes the following steps: Weigh out deionized water and place it in the first stirred tank. Add dispersant to the first stirred tank and stir to mix to obtain the first mixture. The first mixture was transferred to the second stirred tank and heated to 70°C. Then, o-aminobenzoic acid, hexamethylenetetramine, and a film-forming agent were added to the second stirred tank and stirred until homogeneous to obtain the second mixture. The second mixture is cooled to 42°C, and then an antifoaming agent is added to the second stirring vessel to obtain the rust-preventive liquid.

[0057] Furthermore, the film-forming agent is tripropylene glycol n-butyl ether.

[0058] Furthermore, the dispersant is vinyl bis-stearamide.

[0059] Furthermore, the defoamer is polyoxyethylene ether.

[0060] Furthermore, in the preparation method of the rust inhibitor, the stirring speed of the first stirring vessel is 400 r / min, and the stirring time is 30 min.

[0061] Furthermore, in the preparation method of the rust inhibitor, the stirring speed of the second stirring vessel is 530 r / min, and the stirring time is 15 min.

[0062] In this embodiment, it should be noted that spraying the prepared rust inhibitor onto the steel box column can effectively improve the rust prevention effect of the steel box column. After the rust inhibitor was sprayed, the steel box column was exposed to the outdoors for 30 days and no rust appeared.

[0063] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for processing steel box-shaped columns, characterized in that, Includes the following steps: (1) Take the materials used to make the box-shaped column, and weld them according to the design to obtain the welded steel box-shaped column; (2) Pre-treatment of the welded steel box-shaped columns; (3) Spray anti-rust liquid on the pretreated steel box column to complete the processing of the steel box column; The rust inhibitor comprises the following raw materials in parts by weight: 30-40 parts of anthranilic acid, 10-12 parts of hexamethylenetetramine, 4-6 parts of dispersant, 2-4 parts of film-forming agent, 2-5 parts of defoamer, and 60-80 parts of deionized water. The method for preparing the rust inhibitor includes the following steps: Weigh out deionized water and place it in the first stirred tank. Add dispersant to the first stirred tank and stir to mix to obtain the first mixture. The first mixture is transferred to the second stirred tank and heated to 60-70°C. Then, o-aminobenzoic acid, hexamethylenetetramine, and a film-forming agent are added to the second stirred tank and stirred until homogeneous to obtain the second mixture. The second mixture is cooled to 40-42℃, and then a defoamer is added to the second stirring vessel to obtain a rust-preventive liquid. In step (1), the materials used to fabricate the box-shaped columns are taken and welded according to the design, including the following steps: Fix the lower flange plate to the assembly platform and draw the assembly guideline on the lower flange plate; Weld two web plates onto the lower flange plate according to the assembly guideline; Then weld a diaphragm located between the two webs onto the lower flange plate; Flange plates are welded onto the two web plates to obtain a steel box column; In step (2), the preprocessing process is as follows: Remove oxide scale from the weld seam area and the outer surface of the steel box column; Next, use 200-grit, 500-grit, and 800-grit sandpaper to polish the steel box-shaped column in sequence; rinse the polished steel box-shaped column with water 3-4 times, wipe it with a towel, and let it air dry naturally; The film-forming agent is any one of propylene glycol butyl ether, hexanediol butyl ether acetate, or tripropylene glycol n-butyl ether; The dispersant is either ethylenediaminetetraacetic acid or vinyl bis-stearamide; The defoamer is either dimethyl silicone oil or polyoxyethylene ether.

2. The method for processing steel box-shaped columns according to claim 1, characterized in that, In the preparation method of the rust inhibitor, the stirring speed of the first stirring tank is 300-400 r / min, and the stirring time is 20-30 min.

3. The method for processing steel box-shaped columns according to claim 2, characterized in that, In the preparation method of the rust inhibitor, the stirring speed of the second stirring vessel is 520-530 r / min, and the stirring time is 12-15 min.

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