Tank processing technology and cleaning device

Abstract

The invention discloses a tank processing technology and a cleaning device, and belongs to the technical field of storage and transportation equipment. The process comprises an anti-corrosion procedure, a welding procedure, an anti-corrosion procedure and a heat treatment procedure, the heat treatment procedure comprises the four steps of preheating, heating, constant temperature keeping and cooling, iron in a tank body and zinc in a galvanized coating can be effectively and mutually diffused, a coated steel plate of a zinc-iron alloy phase layer is formed, and the iron content of the surface of a coating is increased; further, the inner wall of the tank body has better corrosion resistance, welding performance, coating performance and gravel impact resistance; according to the tank body machining process, the problem that the anti-corrosion effect is poor due to the fact that the quality of a galvanized coating is poor is solved.

Description

Technical Field

[0001] The present application relates to the technical field of storage and transportation equipment, and specifically to a tank body processing technology and a cleaning device. Background Art

[0002] Tank containers are currently widely used equipment for transporting chemical media and raw materials. Tank containers adopt a tank body and frame structure, and the tank body is used to load the medium. Among them, the inner wall of the tank body usually has a thermal spray zinc coating to prevent the medium from corroding the tank body and preventing the tank body from contaminating the medium.

[0003] The existing assembly process only uses molten metal zinc to spray on the inner wall of the tank through atomization. Such coating quality is poor and requires frequent and regular re-coating to prevent the tank from oxidizing under harsh environmental conditions such as high temperature, humidity, acid and alkali.

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

[0005] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide a tank body processing technology to solve the problem of poor anti-corrosion effect caused by poor quality of galvanized coating.

[0006] The technical solution adopted by the present application to solve the technical problem is: a tank body processing technology, comprising the following steps:

[0007] S1. Preparation: Take out the parts for assembly and self-check them according to the drawings and standard requirements; cut holes on the head and grind the grooves according to the welding process to remove surface debris;

[0008] S2. Parts assembly: Assemble the head and connecting ring, plate, flanges, thermometer seat, pressure gauge seat, and pad according to the drawing requirements; weld according to the welding process regulations, and leave 20mm between the sealing plate and the head at the lowest point without welding. After painting, seal with glue;

[0009] S3. Anti-corrosion of the head cylinder: sandblast the inner wall of the head cylinder, clean the rust, oxide scale, stains on the inner wall of the head cylinder and use a vacuum cleaner to clean the accumulated dust. After confirming that it is clean, spray a layer of zinc-rich primer immediately;

[0010] S5. Assembly of head and cylinder section: First, grind the weld groove of head and cylinder section; assemble head and cylinder section, cylinder section and cylinder section by fixture according to the drawing requirements; then spot weld and weld according to the welding process card, and mark the welder;

[0011] S6. Welding inspection: perform X-ray scanning operations 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; according to NB / T47013.2-2015, 100% X-ray inspection is performed on Class B circumferential seams, and the technical level is not lower than AB level flaw detection inspection, and it is qualified if it is not lower than Level II; according to NB / T47013.4-2015, 100% MT is performed on Class B circumferential seams, and it is qualified if it is not lower than Level I.

[0012] S7. Cylinder treatment: Draw the position lines of each hole according to the drawing and installation position requirements; drill holes on the cylinder according to the drawing and grind the groove according to the welding process requirements to remove surface debris;

[0013] S8. Assembly of the outer side of the cylinder: Assemble the flange, liquid phase tank, angle steel, flat rib plate pad and other components on the cylinder; spot weld and weld according to the welding process card. Make welder marks; grind all fillet joints and grind the weld on the inner surface of the liquid phase tank;

[0014] S9, magnetic particle testing: magnetize the workpiece surface after the magnetic suspension wets the workpiece surface; observe and record the magnetic traces immediately after they are formed, and record the test parameters and defective magnetic traces. According to the displayed defective magnetic traces, the quality is graded according to the test process standards, and the weld is determined to be qualified according to the quality acceptance standards; 100% MT test of Class D welds is carried out according to NB / T47013.4-2015, and it is qualified if it is not lower than Grade I;

[0015] S10. Supplementary anti-corrosion: sandblast the untreated annular seams and fillet welds in the tank body, clean the rust, scale, stains and dust in the annular seams and fillet welds, and spray a layer of zinc-rich primer immediately after confirming that they are clean;

[0016] S11. Heat treatment: according to the heat treatment process and the general heat treatment process, the tank body is placed in the treatment furnace for post-weld heat treatment; and the product test plate physical and chemical tests are carried out;

[0017] S12, internal grinding: Use a clean device to grind the inner surface of the tank to remove the coked paint skin;

[0018] S13. Water pressure test: Carry out water pressure test as specified in the drawings.

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

[0020] Furthermore, the heat treatment in step S11 is divided into four stages:

[0021] The first stage: the tank is placed in a treatment furnace as a whole, and the temperature in the treatment furnace does not exceed 400°C;

[0022] The second stage: the treatment furnace is closed and heating begins, the heating rate is not less than 55°C per hour and not more than 220°C per hour;

[0023] The third stage: keep the temperature in the treatment furnace between 600℃-640℃, with 620℃ being the best; the holding time is 50-55 minutes;

[0024] The fourth stage: the temperature in the treatment 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 taken out of the furnace and air-cooled;

[0025] As a result, the tank body meets the standards of post-weld heat treatment in the second stage; in the third stage, the iron in the tank body and the zinc in the galvanized coating diffuse into each other to form a zinc-iron alloy phase layer of coated steel plate, so that the iron content on the coating surface is about 10% (mass fraction); and thus the inner wall of the tank body has better corrosion resistance, welding performance, coating performance and resistance to sand and stone impact.

[0026] Furthermore, the cleaning device in step S12 includes a support arm, a grinding assembly, and a cleaning assembly; a support plate is fixedly mounted on one end of the support arm, and the grinding assembly and the cleaning assembly are fixedly mounted on 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 body; the axis of the support plate and the axis of the tank body are located in the same straight line, and the grinding assembly and the cleaning assembly are tangent to the inner wall of the tank body; thus, the transverse moving platform controls the position of the grinding assembly and the cleaning assembly inside the tank body through the support arm; during grinding, the rotating mechanism controls the rotation of the tank body, and the grinding assembly cleans the coked paint skin inside the tank body; then, the cleaning assembly collects the waste paint skin.

[0027] Furthermore, the polishing assembly includes a mounting seat, which is fixedly mounted on one end of the support plate away from the support arm, and the mounting seat is located at the edge of the support plate; a driven wheel is mounted on the side of the mounting seat away from the support plate through a bearing, and the axis of the driven wheel is perpendicular to the end face of the support plate; a polishing column is fixedly mounted on one end of the driven wheel away from the mounting seat; the polishing column adopts a cylindrical structure, the diameter of the polishing column is larger than the diameter of the driven wheel, and the outer side of the polishing column is tangent to the inner wall of the tank body; thereby, after the support arm controls the support plate to extend into the interior of the tank body, the tank body and the polishing column rub against each other to achieve polishing and cleaning of the coked paint leather.

[0028] Furthermore, the cleaning assembly includes a rotating motor, a driving wheel, and a cleaning column; the fixing portion of the rotating motor is fixedly connected to the supporting disk, and the rotating motor and the mounting seat are symmetrically arranged; the driving wheel is fixedly installed on the rotating shaft of the rotating motor; a fixed shaft is arranged at one end of the driving wheel away from the rotating motor, and the cleaning column is fixedly sleeved on the fixed shaft; the axis of the cleaning column is located in the same straight line as the axis of the driving wheel, and the axis of the cleaning column is perpendicular to the end surface of the supporting disk;

[0029] The cleaning column adopts a cylindrical structure, the diameter of the cleaning column is larger than the diameter of the driving wheel, and the outer side of the cleaning column is tangent to the inner side of the tank body; thus, the rotating motor drives the cleaning column to rotate, and the rotation direction of the cleaning column is opposite to the rotation direction of the tank body, so that the cleaning column wipes the inner wall of the tank body, so that the coked paint that has been polished off will not stick to the inner wall of the tank body.

[0030] Furthermore, a plurality of spiral grooves are provided on the circumferential side of the cleaning column, and the axis of the spiral groove is located on the same straight line as the axis of the cleaning column; a collecting bin is fixedly mounted on the support plate, and a baffle is provided on the top of the collecting bin, and the baffle is located between the cleaning column and the driving wheel, and is clearance-matched with the fixed shaft; thereby, the cleaning column rotates and wipes, so that the waste paint enters the spiral groove, moves with the spiral groove to the baffle, and then falls into the collecting bin.

[0031] Furthermore, the driving wheel and the driven wheel are synchronous wheels, and a synchronous belt is arranged between the driving wheel and the driven wheel; thus, the driven wheel rotates in the same direction as the driving wheel, and then the direction of the polishing column is opposite to the direction of the tank body, thereby enhancing the polishing effect and making the tank body present a zinc metal color after polishing.

[0032] Furthermore, a swing arm is hinged on the support plate, and the swing arm is located on one side of the rotating motor and the mounting seat, and is located between the rotating motor and the mounting seat; a follower wheel is fixedly installed on the end of the swing arm away from the support plate, and the follower wheel is located in the synchronous belt, and one side is engaged with the synchronous belt; an air-controlled telescopic rod is hinged on the support plate, and the movable rod of the air-controlled telescopic rod is hinged to the swing arm; thus, the follower wheel adopts a synchronous wheel structure; after the grinding assembly and the cleaning assembly have been working for a period of time, the synchronous belt is stretched and loosened, and it is easy to slip, which affects the grinding effect. The swing arm is pushed to rotate clockwise by the air-controlled telescopic rod, so that the longitudinal distance between the follower wheel and the driving wheel becomes shorter, thereby realizing the tightening of the synchronous belt to ensure the normal transmission of the synchronous belt without slipping.

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

[0034] The beneficial effects of the present application are as follows: the tank body processing technology provided by the present application, by providing a heat treatment process, enables the tank body to not only complete the post-weld heat treatment, but also allows the iron in the tank body and the zinc in the galvanized coating to diffuse with each other 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); thereby, the inner wall of the tank body has better corrosion resistance, welding performance, coating performance and resistance to sand and stone impact.

[0035] In addition to the above-described purposes, features and advantages, the present application has other purposes, features and advantages. Figure 1-Figure 5 , further detailed description of this application is given. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The drawings in the specification, which constitute a part of the present application, are used to provide further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute improper limitations on the present application.

[0037] In the attached picture:

[0038] Figure 1 It is a schematic diagram of the position of the cleaning device and the tank body used in the tank body processing technology in this application;

[0039] Figure 2 for Figure 1 A three-dimensional schematic diagram of a cleaning device;

[0040] Figure 3 for Figure 2 Schematic diagram of the position of the middle swing arm, mounting base and rotating motor;

[0041] Figure 4 for Figure 1 A schematic plan view of the overall side view;

[0042] Figure 5 It is the heat treatment process curve of the treatment furnace;

[0043] Among them, the reference numerals in the figure are:

[0044] 1. Support arm; 11. Support plate; 111. Limit seat; 12. Swing arm; 121. Follower wheel; 122; Air-controlled telescopic rod; 123. Limit rod; 13. Synchronous belt; 2. Grinding assembly; 21. Mounting seat; 22. Driven wheel; 23. Grinding column; 3. Cleaning assembly; 31. Rotating motor; 32. Driving wheel; 33. Cleaning column; 331. Spiral groove; 34. Collection bin. DETAILED DESCRIPTION

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0047] like Figure 1-5 As shown, the present application provides a can body processing process, comprising the following steps:

[0048] S1. Preparation: Take out the parts for assembly and self-check them according to the drawings and standard requirements; cut holes on the head and grind the grooves according to the welding process to remove surface debris;

[0049] S2. Parts assembly: Assemble the head and connecting ring, plate, flanges, thermometer seat, pressure gauge seat, and pad according to the drawing requirements; weld according to the welding process regulations, and leave 20mm between the sealing plate and the head at the lowest point without welding. After painting, seal with glue;

[0050] S3. Anti-corrosion of the head cylinder: sandblast the inner wall of the head cylinder, clean the rust, oxide scale, stains on the inner wall of the head cylinder and use a vacuum cleaner to clean the accumulated dust. After confirming that it is clean, spray a layer of zinc-rich primer immediately;

[0051] S5. Assembly of head and cylinder section: First, grind the weld groove of head and cylinder section; assemble head and cylinder section, cylinder section and cylinder section by fixture according to the drawing requirements; then spot weld and weld according to the welding process card, and mark the welder;

[0052] S6. Welding inspection: perform X-ray scanning operations 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 seams in accordance with NB / T47013.2-2015, with a technical level not lower than AB level flaw detection inspection, and a level not lower than II is qualified; perform 100% MT on Class B circumferential seams in accordance with NB / T47013.4-2015, with a level not lower than I is qualified.

[0053] S7. Cylinder treatment: Draw the position lines of each hole according to the drawing and installation position requirements; drill holes on the cylinder according to the drawing and grind the groove according to the welding process requirements to remove surface debris;

[0054] S8. Assembly of the outer side of the cylinder: Assemble the flange, liquid phase tank, angle steel, flat rib plate pad and other components on the cylinder; spot weld and weld according to the welding process card. Make welder marks; grind all fillet joints and grind the weld on the inner surface of the liquid phase tank;

[0055] S9, magnetic particle testing: magnetize the workpiece surface after the magnetic suspension wets the workpiece surface; observe and record the magnetic traces immediately after they are formed, and record the test parameters and defective magnetic traces. According to the displayed defective magnetic traces, the quality is graded according to the test process standards, and the weld is determined to be qualified according to the quality acceptance standards; 100% MT test of Class D welds is carried out according to NB / T47013.4-2015, and it is qualified if it is not lower than Grade I;

[0056] S10. Supplementary anti-corrosion: sandblast the untreated annular seams and fillet welds in the tank body, clean the rust, scale, stains and dust in the annular seams and fillet welds, and spray a layer of zinc-rich primer immediately after confirming that they are clean;

[0057] S11. Heat treatment: according to the heat treatment process and the general heat treatment process, the tank body is placed in the treatment furnace for post-weld heat treatment; and the product test plate physical and chemical tests are carried out;

[0058] S12, internal grinding: Use a clean device to grind the inner surface of the tank to remove the coked paint skin;

[0059] S13. Water pressure test: Carry out water pressure test as specified in the drawings.

[0060] Wherein: in step S3, the zinc-rich primer is selected to have a zinc content greater than 50%; during the spraying process, the predetermined weld area is not painted.

[0061] The heat treatment in step S11 is divided into four stages:

[0062] The first stage: the tank is placed in a treatment furnace as a whole, and the temperature in the treatment furnace does not exceed 400°C;

[0063] The second stage: the treatment furnace is closed and heating begins, with the heating rate not less than 55°C per hour and not more than 220°C per hour;

[0064] The third stage: keep the temperature in the treatment furnace between 600℃-640℃, with 620℃ being the best; the holding time is 50-55 minutes;

[0065] The fourth stage: the temperature in the treatment 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 taken out of the furnace and air-cooled;

[0066] As a result, the tank body meets the standards of post-weld heat treatment in the second stage; in the third stage, the iron in the tank body and the zinc in the galvanized coating diffuse into each other to form a zinc-iron alloy phase layer of coated steel plate, so that the iron content on the coating surface is about 10% (mass fraction); and thus the inner wall of the tank body has better corrosion resistance, welding performance, coating performance and resistance to sand and stone impact.

[0067] In addition: See Figure 1-Figure 4 , the cleaning device in step S12 includes a support arm 1, a grinding component 2, and a cleaning component 3;

[0068] Reference Figure 1-Figure 2 A support plate 11 is fixedly mounted at one end of the support arm 1, and a grinding component 2 and a cleaning component 3 are fixedly mounted at the end of the support plate 11 away from the support arm 1; a lateral 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 body; the axis of the support plate 11 and the axis of the tank body are located in the same straight line, and the grinding component 2 and the cleaning component 3 are tangent to the inner wall of the tank body; thus, the lateral moving platform controls the position of the grinding component 2 and the cleaning component 3 inside the tank body through the support arm 1; during grinding, the rotating mechanism controls the rotation of the tank body, and the grinding component 2 cleans the coked paint skin inside the tank body; then, the cleaning component 3 collects the waste paint skin.

[0069] Among them: Reference Figure 2-Figure 4 The grinding assembly 2 includes a mounting seat 21, which is fixedly mounted on the end of the support plate 11 away from the support arm 1, and the mounting seat 21 is located at the edge of the support plate 11; a driven wheel 22 is installed on the side of the mounting seat 21 away from the support plate 11 through 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 seat 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, and the outer side of the grinding column 23 is tangent to the inner wall of the tank body; thus, after the support arm 1 controls the support plate 11 to extend into the interior of the tank body, the tank body and the grinding column 23 rub against each other to achieve grinding and cleaning of the coked paint leather.

[0070] The cleaning assembly 3 includes a rotating motor 31, a driving wheel 32, and a cleaning column 33; the fixed portion of the rotating motor 31 is fixedly connected to the support plate 11, and the rotating motor 31 and the mounting seat 21 are symmetrically arranged; the driving wheel 32 is fixedly mounted on the rotating shaft of the rotating motor 31; a fixed shaft is arranged at one end of the driving wheel 32 away from the rotating motor 31, and the cleaning column 33 is fixedly sleeved on the fixed shaft; the axis of the cleaning column 33 is located in the same straight line as the axis of the driving wheel 32, and the axis of the cleaning column 33 is perpendicular to the end surface of the support plate 11;

[0071] The cleaning column 33 adopts a cylindrical structure, and the diameter of the cleaning column 33 is larger than the diameter of the driving wheel 32. The outer side of the cleaning column 33 is tangent to the inner side of the tank body; thus, the rotating motor 31 drives the cleaning column 33 to rotate, and the rotation direction of the cleaning column 33 is opposite to the rotation direction of the tank body, so that the cleaning column 33 plays a role in wiping the inner wall of the tank body, so that the coked paint that has been polished off will no longer stick to the inner wall of the tank body.

[0072] Reference Figure 2 A plurality of spiral grooves 331 are circumferentially provided on the side of the cleaning column 33, and the axis of the spiral groove 331 is located on the same straight line as the axis of the cleaning column 33; a collecting bin 34 is fixedly mounted on the support plate 11, and a baffle is provided on the top of the collecting bin 34, and the baffle is located between the cleaning column 33 and the driving wheel 32, and is fitted with the fixed shaft in a clearance; thus, the cleaning column 33 rotates and wipes, so that the waste paint enters the spiral groove 331, and as the spiral groove 331 moves to the baffle, it then falls into the collecting bin 34.

[0073] Reference Figure 3 The driving wheel 32 and the driven wheel 22 are synchronous wheels, and a synchronous belt 13 is arranged between the driving wheel 32 and the driven wheel 22; thus, the driven wheel 22 rotates in the same direction as the driving wheel 32, and then the direction of the polishing column 23 is opposite to the direction of the tank body, thereby enhancing the polishing effect and making the tank body present a zinc metal color after polishing.

[0074] A swing arm 12 is hinged on the support plate 11, and the swing arm 12 is located on one side of the rotating motor 31 and the mounting seat 21, and is located between the rotating motor 31 and the mounting seat 21; a follower wheel 121 is fixedly installed on the end of the swing arm 12 away from the support plate 11, and the follower wheel 121 is located in the synchronous belt 13, and one side is in contact with the synchronous belt 13; an air-controlled telescopic rod 122 is hinged on the support plate 11, and the movable rod of the air-controlled telescopic rod 122 is hinged to the swing arm 12; thus, the follower wheel 121 adopts a synchronous wheel structure; after the grinding component 2 and the cleaning component have been working for a period of time, the synchronous belt 13 is stretched and loosened, and it is easy to slip, which affects the grinding effect. Figure 4 The swing arm 12 is pushed to rotate clockwise by the pneumatic telescopic rod 122, so that the longitudinal distance between the driven wheel 121 and the driving wheel 32 becomes shorter, thereby tightening the synchronous belt 13 to ensure that the synchronous belt 13 is normally transmitted without slipping.

[0075] A limiting rod 123 is fixedly installed on one end of the swing arm 12 close to the support plate 11, and a limiting seat 111 is arranged on the support plate 11. The limiting seat 111 is arc-shaped and is arranged concentrically 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, and the limiting rod 123 is slidably arranged in the arc-shaped groove.

[0076] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Tank body processing technology, characterized by: The following steps are involved: S1. Preparation: Take out the parts for assembly and self-check them according to the drawings and standards; cut holes on the head and grind the grooves according to the welding process to remove surface debris; S2. Parts assembly: Assemble the head and connecting ring, plate, flanges, thermometer seat, pressure gauge seat, and pad according to the requirements of the drawings; weld according to the welding process regulations; S3. Anti-corrosion of the head cylinder: sandblast the inner wall of the head cylinder, clean the rust, oxide scale, stains on the inner wall of the head cylinder and use a vacuum cleaner to clean the accumulated dust. After confirming that it is clean, spray a layer of zinc-rich primer immediately; S5. Assembly of head and cylinder section: First, grind the weld groove of head and cylinder section; assemble head and cylinder section, cylinder section and cylinder section by fixture according to the drawing requirements; then spot weld and weld according to the welding process card, and mark the welder; S6, welding inspection: perform X-ray scanning operations and obtain X-ray real-time images; obtain boundary image position information according to the image analysis module, thereby determining the weld quality evaluation index; S7. Cylinder treatment: Draw the position lines of each hole according to the drawing and installation position requirements; drill holes on the cylinder according to the drawing and grind the groove according to the welding process requirements to remove surface debris; S8. Assembly of the outer side of the cylinder: Assemble the flange, liquid phase tank, angle steel, flat rib plate pad and other components on the cylinder; spot weld and weld according to the welding process card. Make welder marks; grind all fillet joints and grind the weld on the inner surface of the liquid phase tank; S9, magnetic particle testing: The magnetic suspension wets the workpiece surface and magnetizes it; observe and record the magnetic traces immediately after they are formed, and the test parameters and defective magnetic traces are recorded. The quality is graded according to the defective magnetic traces displayed according to the test process standards, and the weld is determined to be qualified according to the quality acceptance standards; S10. Supplementary anti-corrosion: sandblast the untreated annular seams and fillet welds in the tank body, clean the rust, scale, stains and dust in the annular seams and fillet welds, and spray a layer of zinc-rich primer immediately after confirming that they are clean; S11. Heat treatment: according to the heat treatment process and the general heat treatment process, the tank body is placed in the treatment furnace for post-weld heat treatment; and the product test plate physical and chemical tests are carried out; S12, internal grinding: Use a clean device to grind the inner surface of the tank to remove the coked paint skin; S13. Water pressure test: Carry out water pressure test as specified in the drawings.

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

3. The can body processing technology according to claim 2, characterized in that: The heat treatment in step S11 is divided into four stages: The first stage: the tank is placed in a treatment furnace as a whole, and the temperature in the treatment furnace does not exceed 400°C; The second stage: the treatment furnace is closed and heating begins, the heating rate is not less than 55°C per hour and not more than 220°C per hour; The third stage: keep the temperature in the treatment furnace between 600℃-640℃, with 620℃ being the best; the holding time is 50-55 minutes; The fourth stage: the temperature in the treatment furnace is reduced to below 400°C, and the cooling rate is not less than 55°C per hour and not more than 280°C per hour; then the tank is taken out of the furnace and air-cooled.

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

5. The cleaning device according to claim 4, characterized in that: The grinding assembly (2) comprises a mounting seat (21), wherein the mounting seat (21) is fixedly mounted on an end of the support plate (11) away from the support arm (1), and the mounting seat (21) is located at the edge of the support plate (11); a driven wheel (22) is mounted on the side of the mounting seat (21) away from the support plate (11) via a bearing, and the axis of the driven wheel (22) is perpendicular to the end surface of the support plate (11); a grinding column (23) is fixedly mounted on the end of the driven wheel (22) away from the mounting seat (21); the grinding column (23) adopts a cylindrical structure, the diameter of the grinding column (23) is greater than the diameter of the driven wheel (22), and the outer side of the grinding column (23) is tangent to the inner wall of the tank body.

6. The cleaning device according to claim 5, characterized in that: The cleaning assembly (3) comprises a rotating motor (31), a driving wheel (32), and a cleaning column (33); the fixed portion of the rotating motor (31) is fixedly connected to the support plate (11), and the rotating motor (31) and the mounting seat (21) are symmetrically arranged; the driving wheel (32) is fixedly mounted on the rotating shaft of the rotating motor (31); a fixed shaft is arranged at one end of the driving wheel (32) away from the rotating motor (31), and the cleaning column (33) is fixedly sleeved on the fixed shaft; The axis of the cleaning column (33) and the axis of the driving wheel (32) are located in the same straight line, and the axis of the cleaning column (33) is perpendicular to the end surface 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 driving wheel (32), and the outer side of the cleaning column (33) is tangent to the inner side of the tank body.

7. The cleaning device according to claim 6, characterized in that: A plurality of spiral grooves (331) are provided on the circumferential side of the cleaning column (33), and the axis of the spiral groove (331) is located on the same straight line as the axis of the cleaning column (33); a collecting bin (34) is fixedly mounted on the support plate (11), and a baffle is provided on the top of the collecting bin (34), and the baffle is located between the cleaning column (33) and the driving wheel (32), and is clearance-matched 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 wheels, and a synchronous belt (13) is arranged 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 hingedly connected to the support plate (11), and the swing arm (12) is located on one side of the rotating motor (31) and the mounting seat (21), and is located between the rotating motor (31) and the mounting seat (21); a follower wheel (121) is fixedly installed at one end of the swing arm (12) away from the support plate (11), and the follower wheel (121) is located in the synchronous belt (13), and one side is engaged with the synchronous belt (13); a pneumatic telescopic rod (122) is hingedly connected to the support plate (11), and a movable rod of the pneumatic telescopic rod (122) is hingedly connected to the swing arm (12).

10. The cleaning device according to claim 9, characterized in that: A limiting rod (123) is fixedly mounted on one end of the swing arm (12) close to the support plate (11); a limiting seat (111) is arranged on the support plate (11); the limiting seat (111) is arc-shaped and is arranged concentrically with the swing arm (12); an arc-shaped groove is formed on 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.

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