Tank processing technology and cleaning equipment

Abstract

This application discloses a tank body processing technology and cleaning device, belonging to the technical field of storage and transportation equipment. The process includes an anti-corrosion process, a welding process, an anti-corrosion process, and a heat treatment process. The heat treatment process includes four steps: preheating, heating, constant temperature, and cooling. It can effectively diffuse the iron in the tank body and the zinc in the galvanized coating, forming a zinc-iron alloy phase layer on the coated steel plate, thereby increasing the iron content on the coating surface. As a result, the inner wall of the tank body has better corrosion resistance, welding performance, coating performance, and resistance to sand and gravel impact. The tank body processing technology of this application solves the problem of poor anti-corrosion effect caused by poor quality galvanized coating.

Description

Technical Field

[0001] This application relates to the field of storage and transportation equipment technology, specifically to tank processing technology and cleaning devices. Background Technology

[0002] Tank containers are currently a widely used type of equipment for transporting chemical media and raw materials. Tank containers utilize a tank and frame structure, with the tank used to load the media. The inner wall of the tank typically has a thermally sprayed zinc coating to prevent corrosion from the media and to prevent contamination of the media by the tank.

[0003] The existing assembly process only uses molten zinc to spray onto the inner wall of the tank through atomization. Such coatings are of poor quality and require frequent and regular recoating to prevent oxidation of the tank under harsh environmental conditions such as high temperature, humidity, and acid and alkali.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore may include information that does not constitute prior art. Summary of the Invention

[0005] Based on the aforementioned problems in the existing technology, the problem to be solved by this application is to provide a tank processing technology that solves the problem of poor anti-corrosion effect caused by poor quality of galvanized coating.

[0006] The technical solution adopted by this application to solve its technical problem is: a tank processing technology, including the following steps:

[0007] S1. Preparation: Take out all parts for assembly, and inspect them according to the drawings and standards to ensure they are qualified; cut all openings on the head and grind the bevels according to the welding process, and remove surface debris.

[0008] S2. Parts assembly: Assemble the end cap, connecting ring, plate, flanges, thermometer seat, pressure gauge seat, and gasket according to the drawings; weld according to the welding process specifications, leaving a 20mm gap at the lowest point when welding the end plate to the end cap; seal with glue after painting.

[0009] S3. Corrosion protection of end cap cylinder: Sandblast the inner wall of the end cap cylinder, clean the rust, oxide scale and stains on the inner wall of the end cap cylinder, and clean the accumulated dust with a vacuum cleaner. After confirming that it is clean, immediately spray a zinc-rich primer.

[0010] S4. Assembly of head and cylindrical section: First, grind the bevel of the weld seam between the head and the cylindrical section; according to the drawing requirements, use tooling and fixtures to assemble the head and the cylindrical section, and the cylindrical section and the cylindrical section; then spot weld and weld according to the welding process card, and make welder marks.

[0011] S5. Welding Inspection: Perform X-ray scanning and obtain real-time X-ray images; obtain boundary image position information based on the image analysis module to determine the weld quality evaluation index; wherein, according to NB / T47013.2-2015, 100% X-ray inspection of Class B circumferential welds is performed, with a technical level not lower than AB grade flaw detection, and not lower than II grade is considered qualified; according to NB / T47013.4-2015, 100% MT inspection of Class B circumferential welds is performed, and not lower than I grade is considered qualified.

[0012] S6. Cylinder body treatment: Mark the position lines of each opening according to the drawings and installation location requirements; make the openings on the cylinder body according to the drawings and grind the bevels according to the welding process requirements, and remove surface debris;

[0013] S7. Assembly on the outer side of the cylinder: Assemble the flange, liquid phase tank, angle steel, flat ribs, and pads on the cylinder; and spot weld and weld according to the welding process card. Make welder's marks; grind all corner joints and smooth the weld seam on the inner surface of the liquid phase tank;

[0014] S8. Magnetic Particle Inspection: After the magnetic suspension wets the workpiece surface, the workpiece surface is magnetized; after the magnetic trace is formed, it is observed immediately, and the inspection parameters and defect magnetic traces are recorded. According to the displayed defect magnetic traces, the quality is graded according to the inspection process standard, and the weld is determined to be qualified according to the quality acceptance standard; 100% MT inspection of Class D welds is carried out according to NB / T47013.4-2015, and a grade not lower than I is considered qualified;

[0015] S9. Supplementary anti-corrosion: Sandblast the untreated circumferential seams and fillet welds inside the tank, clean the rust, scale, and stains in the circumferential seams and fillet welds, and clean the accumulated dust. After confirming that it is clean, immediately spray a layer of zinc-rich primer.

[0016] S10. Heat treatment: According to the heat treatment process and general heat treatment process, the tank is placed in the treatment furnace for post-weld heat treatment; and physical and chemical tests are carried out on the product test plates.

[0017] S11. Internal polishing: Use a cleaning tool to polish the inner surface of the tank to remove the coked paint.

[0018] S12. Water pressure test: Conduct the water pressure test according to the drawings.

[0019] Furthermore, in step S3, the zinc-rich primer is selected from brands with a zinc content greater than 50%; the predetermined weld area is not painted during the spraying process.

[0020] Furthermore, the heat treatment in step S10 is divided into four stages:

[0021] First stage: Place the entire tank into the processing furnace, and ensure that the temperature inside the processing furnace does not exceed 400℃;

[0022] Second stage: The furnace is shut down and heating begins, with a heating rate of not less than 55°C per hour and not more than 220°C per hour;

[0023] Third stage: Maintain the temperature inside the furnace between 600℃ and 640℃, with 620℃ being optimal; the holding time is 50-55 minutes.

[0024] Fourth stage: The temperature inside the furnace is reduced to below 400℃, and the cooling rate is no less than 55℃ per hour and no more than 280℃ per hour; then the tank is removed from the furnace and air-cooled.

[0025] Thus, the tank body reaches the standard of post-weld heat treatment in the second stage; in the third stage, the iron in the tank body diffuses with the zinc in the galvanized coating to form a zinc-iron alloy phase layer on the coated steel plate, so that the iron content on the coating surface is about 10% (mass fraction); thereby the inner wall of the tank has better corrosion resistance, welding performance, coating performance and sand and gravel impact resistance.

[0026] Furthermore, the cleaning device in step S11 includes a support arm, a grinding assembly, and a cleaning assembly; a support plate is fixedly installed at one end of the support arm, and the grinding assembly and cleaning assembly are fixedly installed at the end of the support plate away from the support arm; a transverse moving platform is provided at the end of the support arm away from the support plate, and a rotating mechanism is provided on the outside of the tank; the axis of the support plate is on the same straight line as the axis of the tank, and the grinding assembly and cleaning assembly are tangent to the inner wall of the tank; thus, the transverse moving platform controls the position of the grinding assembly and cleaning assembly inside the tank through the support arm; during grinding, the rotating mechanism controls the tank to rotate, and the grinding assembly cleans the coked paint skin inside the tank; subsequently, the cleaning assembly collects the paint waste.

[0027] Furthermore, the grinding assembly includes a mounting base, which is fixedly mounted on the end of the support plate away from the support arm, and the mounting base is located at the edge of the support plate. A driven wheel is mounted on the side of the mounting base away from the support plate via a bearing, and the axis of the driven wheel is perpendicular to the end face of the support plate. A grinding column is fixedly mounted on the end of the driven wheel away from the mounting base. The grinding column has a cylindrical structure, and its diameter is larger than that of the driven wheel. The outer side of the grinding column is tangent to the inner wall of the tank. Thus, after the support arm controls the support plate to extend into the tank, the tank and the grinding column rub against each other, thereby achieving the grinding and cleaning of the coking paint.

[0028] Furthermore, the cleaning assembly includes a rotary motor, a drive wheel, and a cleaning column; the fixed part of the rotary motor is fixedly connected to the support plate, and the rotary motor and the mounting base are symmetrically arranged; the drive wheel is fixedly mounted on the rotating shaft of the rotary motor; a fixed shaft is provided at the end of the drive wheel away from the rotary motor, and the cleaning column is fixedly sleeved on the fixed shaft; the axis of the cleaning column is on the same straight line as the axis of the drive wheel, and the axis of the cleaning column is perpendicular to the end face of the support plate;

[0029] The cleaning column has a cylindrical structure with a diameter larger than that of the drive wheel. The outer side of the cleaning column is tangent to the inner side of the tank. As a result, the rotary motor drives the cleaning column to rotate in the opposite direction to the rotation of the tank. This allows the cleaning column to wipe the inner wall of the tank, preventing the coking paint that has been removed from the sand from sticking to the inner wall of the tank.

[0030] Furthermore, the cleaning column has multiple spiral grooves circumferentially formed on its side, and the axis of the spiral grooves is on the same straight line as the axis of the cleaning column; a collection chamber is fixedly installed on the support plate, and a baffle is provided on the top of the collection chamber. The baffle is located between the cleaning column and the drive wheel, and is clearance-fitted with the fixed shaft; thus, the cleaning column rotates and wipes, causing paint waste to enter the spiral grooves, move with the spiral grooves to reach the baffle, and then fall into the collection chamber.

[0031] Furthermore, the driving wheel and the driven wheel are synchronous wheels, and a synchronous belt is provided between the driving wheel and the driven wheel; thus, the driven wheel rotates in the same direction as the driving wheel, and the direction of the grinding column is opposite to that of the tank body, thereby enhancing the grinding effect and making the tank body appear zinc metallic color after grinding.

[0032] Furthermore, a swing arm is hinged to the support plate, located on one side of the rotary motor and the mounting base, and between the rotary motor and the mounting base. A follower wheel is fixedly mounted on the end of the swing arm away from the support plate, located within the synchronous belt, and one side of the follower wheel is engaged with the synchronous belt. A pneumatically controlled telescopic rod is hinged to the support plate, and the movable rod of the pneumatically controlled telescopic rod is hinged to the swing arm. Thus, the follower wheel adopts a synchronous wheel structure. After the grinding and cleaning components have been working for a period of time, the synchronous belt becomes stretched and loose, which can easily lead to slippage and affect the grinding effect. By pushing the swing arm to rotate clockwise through the pneumatically controlled telescopic rod, the longitudinal distance between the follower wheel and the driving wheel is shortened, thereby tightening the synchronous belt to ensure normal transmission of the synchronous belt and prevent slippage.

[0033] Furthermore, a limiting rod is fixedly installed at one end of the swing arm near the support plate, and a limiting seat is provided on the support plate. The limiting seat is arc-shaped and concentrically arranged with the swing arm. An arc-shaped groove is opened at the end of the limiting seat away from the support plate, and the limiting rod is slidably arranged in the arc-shaped groove.

[0034] The beneficial effects of this application are: the tank processing technology provided by this application, by setting up a heat treatment process, not only completes the post-weld heat treatment of the tank, but also allows the iron in the tank to diffuse with the zinc in the galvanized coating to form a zinc-iron alloy phase layer of the coated steel plate, so that the iron content on the coating surface is about 10% (mass fraction); thus, the inner wall of the tank has better corrosion resistance, welding performance, coating performance and sand and gravel impact resistance.

[0035] In addition to the purposes, features, and advantages described above, this application has other purposes, features, and advantages. These will be referred to below. Figure 1-Figure 5 This application will be described in further detail. Attached Figure Description

[0036] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0037] Figure 1 This is a schematic diagram showing the location of the cleaning device used in the tank processing technology in this application relative to the tank body;

[0038] Figure 2 for Figure 1 A three-dimensional schematic diagram of the cleaning device;

[0039] Figure 3 for Figure 2 Schematic diagram showing the positions of the swing arm, mounting base, and rotary motor;

[0040] Figure 4 for Figure 1 A schematic plan view of the overall side view of the center;

[0041] Figure 5 The heat treatment process curve of the furnace is shown in the figure.

[0042] The following are the labeling elements in the figure:

[0043] 1. Support arm; 11. Support plate; 111. Limit seat; 12. Swing arm; 121. Follower wheel; 122. Pneumatic telescopic rod; 123. Limit rod; 13. Synchronous belt; 2. Grinding assembly; 21. Mounting base; 22. Driven wheel; 23. Grinding column; 3. Cleaning assembly; 31. Rotary motor; 32. Drive wheel; 33. Cleaning column; 331. Spiral groove; 34. Collection chamber. Detailed Implementation

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0046] like Figure 1-5 As shown, this application provides a tank processing technology, including the following steps:

[0047] S1. Preparation: Take out all parts for assembly, and inspect them according to the drawings and standards to ensure they are qualified; cut all openings on the head and grind the bevels according to the welding process, and remove surface debris.

[0048] S2. Parts assembly: Assemble the end cap, connecting ring, plate, flanges, thermometer seat, pressure gauge seat, and gasket according to the drawings; weld according to the welding process specifications, leaving a 20mm gap at the lowest point when welding the end plate to the end cap; seal with glue after painting.

[0049] S3. Corrosion protection of end cap cylinder: Sandblast the inner wall of the end cap cylinder, clean the rust, oxide scale and stains on the inner wall of the end cap cylinder, and clean the accumulated dust with a vacuum cleaner. After confirming that it is clean, immediately spray a zinc-rich primer.

[0050] S4. Assembly of head and cylindrical section: First, grind the bevel of the weld seam between the head and the cylindrical section; according to the drawing requirements, use tooling and fixtures to assemble the head and the cylindrical section, and the cylindrical section and the cylindrical section; then spot weld and weld according to the welding process card, and make welder marks.

[0051] S5. Welding Inspection: Perform X-ray scanning and obtain real-time X-ray images; obtain boundary image position information based on the image analysis module to determine the weld quality evaluation index; perform 100% X-ray inspection on Class B circumferential welds according to NB / T47013.2-2015, with a technical level not lower than AB grade flaw detection, and not lower than II grade for qualification; perform 100% MT inspection on Class B circumferential welds according to NB / T47013.4-2015, with not lower than I grade for qualification.

[0052] S6. Cylinder body treatment: Mark the position lines of each opening according to the drawings and installation location requirements; make the openings on the cylinder body according to the drawings and grind the bevels according to the welding process requirements, and remove surface debris;

[0053] S7. Assembly on the outer side of the cylinder: Assemble flanges, liquid phase tanks, angle steel, flat ribs, and pads on the cylinder; and spot weld and weld according to the welding process card specifications. Make welder's marks; grind all corner joints and smooth the weld seams on the inner surface of the liquid phase tank;

[0054] S8. Magnetic Particle Inspection: After the magnetic suspension wets the workpiece surface, the workpiece surface is magnetized; after the magnetic trace is formed, it is observed immediately, and the inspection parameters and defect magnetic traces are recorded. According to the displayed defect magnetic traces, the quality is graded according to the inspection process standard, and the weld is determined to be qualified according to the quality acceptance standard; 100% MT inspection of Class D welds is carried out according to NB / T47013.4-2015, and a grade not lower than I is considered qualified;

[0055] S9. Supplementary anti-corrosion: Sandblast the untreated circumferential seams and fillet welds inside the tank, clean the rust, scale, and stains in the circumferential seams and fillet welds, and clean the accumulated dust. After confirming that it is clean, immediately spray a layer of zinc-rich primer.

[0056] S10. Heat treatment: According to the heat treatment process and general heat treatment process, the tank is placed in the treatment furnace for post-weld heat treatment; and physical and chemical tests are carried out on the product test plates.

[0057] S11. Internal polishing: Use a cleaning tool to polish the inner surface of the tank to remove the coked paint.

[0058] S12. Water pressure test: Conduct the water pressure test according to the drawings.

[0059] In step S3, the zinc-rich primer should be selected with a zinc content greater than 50%; the predetermined weld area should not be painted during the spraying process.

[0060] The heat treatment in step S10 consists of four stages:

[0061] First stage: Place the entire tank into the processing furnace, and ensure that the temperature inside the processing furnace does not exceed 400℃;

[0062] Second stage: The furnace is shut down and heating begins, with a heating rate of not less than 55°C per hour and not exceeding 220°C per hour;

[0063] Third stage: Maintain the temperature inside the furnace between 600℃ and 640℃, with 620℃ being optimal; the holding time is 50-55 minutes.

[0064] Fourth stage: The temperature inside the furnace is reduced to below 400℃, and the cooling rate is no less than 55℃ per hour and no more than 280℃ per hour; then the tank is removed from the furnace and air-cooled.

[0065] Thus, the tank body reaches the standard of post-weld heat treatment in the second stage; in the third stage, the iron in the tank body diffuses with the zinc in the galvanized coating to form a zinc-iron alloy phase layer on the coated steel plate, so that the iron content on the coating surface is about 10% (mass fraction); thereby the inner wall of the tank has better corrosion resistance, welding performance, coating performance and sand and gravel impact resistance.

[0066] In addition: Refer to Figure 1-Figure 4 The cleaning device in step S11 includes a support arm 1, a grinding component 2, and a cleaning component 3;

[0067] Reference Figure 1-Figure 2 A support plate 11 is fixedly installed at one end of the support arm 1. The grinding component 2 and the cleaning component 3 are fixedly installed at the end of the support plate 11 away from the support arm 1. A transverse moving platform is provided at the end of the support arm 1 away from the support plate 11, and a rotating mechanism is provided on the outside of the tank. The axis of the support plate 11 is on the same straight line as the axis of the tank, and the grinding component 2 and the cleaning component 3 are tangent to the inner wall of the tank. Thus, the transverse moving platform controls the position of the grinding component 2 and the cleaning component 3 inside the tank through the support arm 1. During grinding, the rotating mechanism controls the rotation of the tank, and the grinding component 2 cleans the coked paint skin inside the tank. Subsequently, the cleaning component 3 collects the paint waste.

[0068] Where: Reference Figures 2-4 The grinding assembly 2 includes a mounting base 21, which is fixedly mounted on the end of the support plate 11 away from the support arm 1, and the mounting base 21 is located on the edge of the support plate 11. A driven wheel 22 is mounted on the side of the mounting base 21 away from the support plate 11 via a bearing, and the axis of the driven wheel 22 is perpendicular to the end face of the support plate 11. A grinding column 23 is fixedly mounted on the end of the driven wheel 22 away from the mounting base 21. The grinding column 23 has a cylindrical structure, and the diameter of the grinding column 23 is larger than the diameter of the driven wheel 22. The outer side of the grinding column 23 is tangent to the inner wall of the tank. Thus, after the support arm 1 controls the support plate 11 to extend into the tank, the tank and the grinding column 23 rub against each other, thereby achieving the grinding and cleaning of the coking paint.

[0069] The cleaning assembly 3 includes a rotary motor 31, a drive wheel 32, and a cleaning column 33. The fixed part of the rotary motor 31 is fixedly connected to the support plate 11, and the rotary motor 31 and the mounting base 21 are symmetrically arranged. The drive wheel 32 is fixedly installed on the rotating shaft of the rotary motor 31. A fixed shaft is provided at the end of the drive wheel 32 away from the rotary motor 31, and the cleaning column 33 is fixedly sleeved on the fixed shaft. The axis of the cleaning column 33 is on the same straight line as the axis of the drive wheel 32, and the axis of the cleaning column 33 is perpendicular to the end face of the support plate 11.

[0070] The cleaning column 33 adopts a cylindrical structure, and the diameter of the cleaning column 33 is larger than the diameter of the drive wheel 32. The outer side of the cleaning column 33 is tangent to the inner side of the tank. As a result, the rotary motor 31 drives the cleaning column 33 to rotate. The rotation direction of the cleaning column 33 is opposite to the rotation direction of the tank. Thus, the cleaning column 33 plays a role in wiping the inner wall of the tank, so that the coking paint skin that is polished off will no longer stick to the inner wall of the tank.

[0071] Reference Figure 2The cleaning column 33 has multiple spiral grooves 331 circumferentially opened on its side, and the axis of the spiral grooves 331 is on the same straight line as the axis of the cleaning column 33. A collection chamber 34 is fixedly installed on the support plate 11. A baffle is provided on the top of the collection chamber 34. The baffle is located between the cleaning column 33 and the drive wheel 32 and is clearance-fitted with the fixed shaft. As the cleaning column 33 rotates and wipes, the paint waste enters into the spiral grooves 331. As the spiral grooves 331 move to the baffle, they fall into the collection chamber 34.

[0072] Reference Figure 3 The driving wheel 32 and the driven wheel 22 are synchronous wheels, and a synchronous belt 13 is set between the driving wheel 32 and the driven wheel 22. As a result, the driven wheel 22 rotates in the same direction as the driving wheel 32, and the direction of the grinding column 23 is opposite to that of the tank body, thereby enhancing the grinding effect and making the tank body appear zinc metallic color after grinding.

[0073] A swing arm 12 is hinged to the support plate 11. The swing arm 12 is located on one side of the rotary motor 31 and the mounting base 21, and between the rotary motor 31 and the mounting base 21. A follower wheel 121 is fixedly installed at the end of the swing arm 12 away from the support plate 11. The follower wheel 121 is located inside the synchronous belt 13, and one side is tangent to the synchronous belt 13. A pneumatic telescopic rod 122 is hinged to the support plate 11. The movable rod of the pneumatic telescopic rod 122 is hinged to the swing arm 12. Thus, the follower wheel 121 adopts a synchronous wheel structure. After the grinding assembly 2 and the cleaning assembly have been working for a period of time, the synchronous belt 13 may become stretched and loose, easily causing slippage and affecting the grinding effect. (Refer to...) Figure 4 The pneumatic telescopic rod 122 pushes the swing arm 12 to rotate clockwise, which shortens the longitudinal distance between the follower wheel 121 and the driving wheel 32, thereby tightening the synchronous belt 13 to ensure normal transmission of the synchronous belt 13 without slippage.

[0074] A limit rod 123 is fixedly installed at one end of the swing arm 12 near the support plate 11. A limit seat 111 is provided on the support plate 11. The limit seat 111 is arc-shaped and concentrically arranged with the swing arm 12. An arc-shaped groove is opened at the end of the limit seat 111 away from the support plate 11, and the limit rod 123 is slidably arranged in the arc-shaped groove.

[0075] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. Tank body processing technology, characterized in that: Includes the following steps: S1. Preparation: Take out all parts for assembly, and inspect them according to the drawings and standards to ensure they are qualified; cut all openings on the head and grind the bevels according to the welding process, and remove surface debris. S2. Parts Assembly: Assemble the end caps, connecting rings, plates, flanges, thermometer seats, pressure gauge seats, and gaskets according to the drawings; weld according to the welding process specifications. S3. Corrosion protection of end cap cylinder: Sandblast the inner wall of the end cap cylinder, clean the rust, oxide scale and stains on the inner wall of the end cap cylinder, and clean the accumulated dust with a vacuum cleaner. After confirming that it is clean, immediately spray a zinc-rich primer. S4. Assembly of head and cylindrical section: First, grind the bevel of the weld seam between the head and the cylindrical section; according to the drawing requirements, use tooling and fixtures to assemble the head and the cylindrical section, and the cylindrical section and the cylindrical section; then spot weld and weld according to the welding process card, and make welder marks. S5. Welding Inspection: Perform X-ray scanning and obtain real-time X-ray images; obtain boundary image position information based on the image analysis module, and thus determine the weld quality evaluation index; S6. Cylinder body treatment: Mark the position lines of each opening according to the drawings and installation location requirements; make the openings on the cylinder body according to the drawings and grind the bevels according to the welding process requirements, and remove surface debris; S7. Assembly on the outer side of the cylinder: Assemble the flange, liquid phase tank, angle steel, flat rib plate and pad on the cylinder; spot weld and weld according to the welding process card, and make the welder's mark; grind all corner joints and grind the weld seam on the inner surface of the liquid phase tank. S8. Magnetic particle inspection: After the magnetic suspension wets the surface of the workpiece, the surface of the workpiece is magnetized; after the magnetic trace is formed, it is observed immediately, and the inspection parameters and defect magnetic traces are recorded. According to the displayed defect magnetic traces, the quality is graded according to the inspection process standard, and the weld is determined to be qualified according to the quality acceptance standard. S9. Supplementary anti-corrosion: Sandblast the untreated circumferential seams and fillet welds inside the tank, clean the rust, scale, and stains in the circumferential seams and fillet welds, and clean the accumulated dust. After confirming that it is clean, immediately spray a layer of zinc-rich primer. S10. Heat treatment: According to the heat treatment process and general heat treatment process, the tank is placed in the treatment furnace for post-weld heat treatment; and physical and chemical tests are carried out on the product test plates. S11. Internal polishing: Use a cleaning tool to polish the inner surface of the tank to remove the coked paint. S12. Water pressure test: Conduct the water pressure test according to the drawings.

2. The tank processing technology according to claim 1, characterized in that: In step S3, the zinc-rich primer is selected with a zinc content greater than 50%; the predetermined weld area is not painted during the spraying process.

3. The tank processing technology according to claim 2, characterized in that: The heat treatment in step S10 consists of four stages: First stage: Place the entire tank into the processing furnace, and ensure that the temperature inside the processing furnace does not exceed 400℃; Second stage: The furnace is shut down and heating begins, with a heating rate of not less than 55°C per hour and not more than 220°C per hour; Third stage: Maintain the temperature inside the furnace between 600℃ and 640℃, with 620℃ being optimal; the holding time is 50-55 minutes. Fourth stage: The temperature inside the furnace is reduced to below 400℃, and the cooling rate is not less than 55℃ per hour and not more than 280℃ per hour; then the tank is removed from the furnace and air-cooled.

4. A cleaning device for the tank processing technology of claim 1, characterized in that: The cleaning device includes a support arm (1), a grinding component (2), and a cleaning component (3); a support plate (11) is fixedly installed at one end of the support arm (1), and the grinding component (2) and the cleaning component (3) are fixedly installed at the end of the support plate (11) away from the support arm (1); a transverse moving platform is provided at the end of the support arm (1) away from the support plate (11), and a rotating mechanism is provided on the outside of the tank; the axis of the support plate (11) is on the same straight line as the axis of the tank, and the grinding component (2) and the cleaning component (3) are tangent to the inner wall of the tank.

5. The cleaning device according to claim 4, characterized in that: The grinding assembly (2) includes a mounting base (21), which is fixedly mounted on the end of the support plate (11) away from the support arm (1). The mounting base (21) is located on the edge of the support plate (11). A driven wheel (22) is mounted on the side of the mounting base (21) away from the support plate (11) via a bearing. The axis of the driven wheel (22) is perpendicular to the end face of the support plate (11). A grinding column (23) is fixedly mounted on the end of the driven wheel (22) away from the mounting base (21). The grinding column (23) adopts a cylindrical structure. The diameter of the grinding column (23) is larger than the diameter of the driven wheel (22). The outer side of the grinding column (23) is tangent to the inner wall of the tank.

6. The cleaning device according to claim 5, characterized in that: The cleaning assembly (3) includes a rotary motor (31), a drive wheel (32), and a cleaning column (33); the fixed part of the rotary motor (31) is fixedly connected to the support plate (11), and the rotary motor (31) and the mounting base (21) are symmetrically arranged; the drive wheel (32) is fixedly installed on the rotating shaft of the rotary motor (31); a fixed shaft is provided at the end of the drive wheel (32) away from the rotary motor (31), and the cleaning column (33) is fixedly sleeved on the fixed shaft; The axis of the cleaning column (33) is on the same straight line as the axis of the drive wheel (32), and the axis of the cleaning column (33) is perpendicular to the end face of the support plate (11). The cleaning column (33) adopts a cylindrical structure, the diameter of the cleaning column (33) is larger than the diameter of the drive wheel (32), and the outer side of the cleaning column (33) is tangent to the inner side of the tank.

7. The cleaning device according to claim 6, characterized in that: The cleaning column (33) has multiple spiral grooves (331) circumferentially opened on its side, and the axis of the spiral grooves (331) is on the same straight line as the axis of the cleaning column (33); a collection chamber (34) is fixedly installed on the support plate (11), and a baffle is provided on the top of the collection chamber (34). The baffle is located between the cleaning column (33) and the drive wheel (32), and is clearance-fitted with the fixed shaft.

8. The cleaning device according to claim 7, characterized in that: The driving wheel (32) and the driven wheel (22) are synchronous pulleys, and a synchronous belt (13) is provided between the driving wheel (32) and the driven wheel (22).

9. The cleaning device according to claim 8, characterized in that: A swing arm (12) is hinged to the support plate (11). The swing arm (12) is located on one side of the rotary motor (31) and the mounting base (21), and is located between the rotary motor (31) and the mounting base (21). A follower wheel (121) is fixedly installed at one end of the swing arm (12) away from the support plate (11). The follower wheel (121) is located inside the synchronous belt (13), and one side is in contact with the synchronous belt (13). A pneumatic telescopic rod (122) is hinged to the support plate (11). The movable rod of the pneumatic telescopic rod (122) is hinged to the swing arm (12).

10. The cleaning device according to claim 9, characterized in that: A limiting rod (123) is fixedly installed at one end of the swing arm (12) near the support plate (11). A limiting seat (111) is provided on the support plate (11). The limiting seat (111) is arc-shaped and concentrically arranged with the swing arm (12). An arc-shaped groove is opened at one end of the limiting seat (111) away from the support plate (11). The limiting rod (123) is slidably arranged in the arc-shaped groove.

Images