Leakage maintenance method of cathode roller for electrolytic copper foil

Abstract

The invention discloses a liquid leakage maintenance method for a cathode roller for electrolytic copper foil, belongs to the technical field of cathode roller repair, can effectively avoid the risk caused by hydrogen in the roller when the cathode roller is repaired by using a trepanning method, improves the overall safety when the cathode roller is repaired, and meanwhile, improves the safety of the cathode roller by adopting welding repair. And rapid and effective repair of the cathode roller can be realized. The liquid leakage maintenance method of the cathode roller for the electrolytic copper foil comprises the steps that residual copper sulfate, oxide skin and the like on a titanium side plate are cleaned through laser, vent holes in the two sides of a shaft head of the cathode roller are opened, then inert gas is introduced to replace hydrogen, a manhole is formed in the side plate, rust removal treatment is conducted on the interior of the cathode roller, weight balancing is conducted on the cathode roller, and the balance degree of the cathode roller is guaranteed. A milling machine is used for machining a titanium plate, a copper plate and a steel plate into a titanium circular plate, a copper circular plate and a steel circular plate, automatic welding equipment is used for sequentially welding the steel circular plate, the copper circular plate and the titanium circular plate, the defect positions of side plates are manually welded, and after liquid leakage repair is completed, the process is transferred to other processes.

Description

Technical Field

[0001] The invention belongs to the technical field of cathode roller repair, and in particular relates to a liquid leakage repair method for a cathode roller for electrolytic copper foil. Background Art

[0002] In the production process of electrolytic copper foil, the cathode roller undoubtedly plays a pivotal role. As one of the core equipment of the electrolytic copper foil production line, the cathode roller not only carries the task of reducing copper ions and converting them into metallic copper, but is also a key link in the continuous production of copper foil. However, the working environment of the cathode roller is quite harsh. It is immersed in highly corrosive electrolyte for a long time, which makes the side plate of the cathode roller susceptible to corrosion. As an important part of the cathode roller, the integrity of the side plate directly affects the overall performance of the cathode roller. Under the continuous erosion of the electrolyte, weak points such as the welds on the side plate will gradually become fragile, and then cracks or defects will occur. These cracks and defects are like tiny portals that allow the electrolyte to penetrate into the interior of the cathode roller. Once the electrolyte enters the interior of the cathode roller, it will not only cause a waste of electrolyte and increase production costs, but more importantly, it will also affect the quality and output of the electrolytic copper foil.

[0003] The accumulation of electrolyte inside the cathode roller will gradually form solid crystals, which not only occupy the internal space of the cathode roller, but also may block the flow channel of the cathode roller and hinder the flow of electrolyte. More seriously, when the electrolyte reacts with the metal inside the cathode roller, a large amount of hydrogen will be produced. Hydrogen is a flammable and explosive gas, and its presence brings great safety hazards to the maintenance of the cathode roller.

[0004] At present, there is no published technical patent that proposes an effective repair method for the leakage of cathode rollers for electrolytic copper foil. This is mainly because the complexity and particularity of the leakage problem make traditional repair methods difficult to work. Therefore, how to effectively solve the leakage of cathode rollers has become a difficult problem that needs to be solved urgently in the production process of electrolytic copper foil. In order to solve this problem, it is necessary not only to conduct in-depth research on the material, structure and working environment of the cathode roller, but also to combine advanced materials and process technologies to explore more efficient and safe repair methods. Therefore, a leakage repair method for cathode rollers for electrolytic copper foil with high safety, simple operation, obvious effect and high stability is needed to assist in solving this problem. Summary of the invention

[0005] (1) Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a leakage repair method for a cathode roller for electrolytic copper foil. The leakage repair method for a cathode roller for electrolytic copper foil can effectively avoid the risks brought by hydrogen in the roller when repairing the cathode roller by using a hole-opening method, and try to avoid the occurrence of explosions caused by hydrogen during subsequent repairs, thereby improving the overall safety of the cathode roller during repair. At the same time, through the use of welding repair, the cathode roller can be repaired quickly and effectively, the leakage point can be quickly located and sealed, and the repair time is short, with less impact on production. At the same time, the welding repair can be applicable to cathode rollers of various types and specifications, whether large or small, with strong overall adaptability. Compared with replacing the entire cathode roller, the welding repair has a lower cost and a shorter repair time, which can reduce economic losses caused by downtime.

[0007] (2) Technical solution

[0008] In order to solve the above technical problems, the present invention provides a method for repairing liquid leakage of a cathode roller for electrolytic copper foil, the method comprising the following steps:

[0009] S1. Place the cathode roller for electrolytic copper foil on a support frame and fix it;

[0010] S2. Clean the impurities on the titanium side plate by laser cleaning, and grind the parts to be processed by a grinder;

[0011] S3, opening the ventilation holes on both sides of the cathode roller shaft head, and opening holes of corresponding number and size on the side plate of the cathode roller according to the size of the cathode roller, wherein the holes include air inlet holes and air outlet holes;

[0012] S4, rotating the cathode roller and adjusting the cathode roller to a specified state, introducing inert gas into the cathode roller to replace hydrogen, and replacing hydrogen to a safe concentration within a period of time. After reaching the safe concentration, the cathode roller is adjusted for a second time;

[0013] S5. Draw an area containing all the holes on the titanium side plate, and open a manhole of corresponding size in the area, and then open manholes of the same size on the copper side plate and the steel side plate in turn;

[0014] S6, cleaning the electrolyte solid crystals and other impurities inside the cathode roller, and performing rust removal treatment on the inside of the cathode roller;

[0015] S7. Use the color penetration method to detect the side plates and welds, and determine whether there are defects such as pores and slag inclusions;

[0016] S8. Counterweight the cathode roller to ensure its balance;

[0017] S9, measuring, marking and cutting the titanium plate, copper plate and steel plate respectively, and cutting out titanium plates, copper plates and steel plates of corresponding sizes;

[0018] S10, welding the steel plate, the copper plate and the titanium plate in sequence;

[0019] S11. Use the dye penetrant method to detect whether there are welding defects in the titanium round plate weld and the manually welded weld;

[0020] S12. After the leakage is repaired, transfer to other processes.

[0021] As a further preferred embodiment, the impurities on the titanium side plate in S2 include residual copper sulfate and oxide scale, and the parts to be processed in S2 include welds, cracks and areas with potential hazards.

[0022] As a further preferred solution, there is one exhaust hole in S3, which is located at the outer edge of the cathode roller, and there are 2-4 air inlet holes in S3.

[0023] As a further preferred embodiment, the diameter of the exhaust hole and the air inlet hole ranges from 10 to 25 mm and is denoted as φ 1 The air inlet is within 400-600mm of the exhaust hole, and 400-600mm is recorded as φ 2 .

[0024] As a further preferred solution, the specified state in S4 refers to transferring the cathode roller exhaust holes to the top to facilitate subsequent replacement of hydrogen. The secondary state of the cathode roller in S4 is that all the holes on the side plates are transferred to the bottom.

[0025] As a further preferred solution, the safe concentration of hydrogen in S4 is less than 1.5%.

[0026] As a further preferred embodiment, the process of the coloring penetration method in S7 comprises the following steps:

[0027] A1. Spray penetrant on the side panels and welds, and then leave it alone for a while;

[0028] A2. Use a cleaning agent to remove the surface penetrant and dry it for a while;

[0029] A3. After drying, apply developer to the side panels and welds and wait for a while;

[0030] A4. Mark the locations of cracks and potential hazards based on the image location;

[0031] A5. Use titanium welding rods to weld and repair cracks and potential hazards.

[0032] As a further preferred solution, the static time in A1 is 15-20 minutes, the drying time in A2 is 8-10 minutes, and the waiting time in A3 is 3-5 minutes.

[0033] As a further preferred solution, the steel plate and the copper plate in S9 are both φ in diameter. 2 -3mm round plate with groove and record this dimension as φ 3 The titanium plate has a diameter of φ 2 +20mm round plate and record this dimension as φ 4 .

[0034] As a further preferred solution, the welding in S10 includes the following steps:

[0035] B1. Grind and polish the steel plates, copper plates and titanium plates that need to be processed before welding;

[0036] B2. Manually spot weld four points to preliminarily fix the plate;

[0037] B3. After the initial fixation, the plate is welded as a whole circle by automatic welding.

[0038] (3) Beneficial effects

[0039] Compared with the prior art, the present invention has the following beneficial effects:

[0040] The present invention can effectively avoid the risk of hydrogen in the roller when repairing the cathode roller by using the hole opening method, and try to avoid the explosion caused by hydrogen during subsequent repair, thereby improving the overall safety of the cathode roller during repair;

[0041] The present invention can realize fast and effective repair of the cathode roller by adopting welding repair, can quickly locate and seal the leakage point, and the maintenance time is short, which has little impact on production. At the same time, the welding repair can be applied to cathode rollers of various types and specifications, whether large or small, and has strong overall adaptability. Compared with replacing the entire cathode roller, the welding repair has lower cost and shorter repair time, which can reduce economic losses caused by downtime.

[0042] The present invention uses the color penetration method for detection multiple times before and after repair, which can accurately locate the leakage point and ensure that the leakage point is completely sealed after welding repair, and the welding point is firm and has good sealing, thereby effectively preventing the leakage problem from occurring again. The use of high-performance corrosion-resistant titanium material as the main material for welding repair can make the welding point have higher strength and corrosion resistance, and can operate stably for a long time in harsh electrolytic environment, thereby extending the service life of the cathode roller.

[0043] In summary, the cathode roller welding repair solution provided in this application aims to achieve efficient, stable and reliable repair effects on the cathode roller by selecting suitable welding materials, introducing advanced welding technology and equipment, and focusing on quality control and testing. This will help reduce production interruptions and equipment damage caused by cathode roller leakage problems, thereby improving production efficiency and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0045] Figure 1 is a flow chart of the method of the present invention;

[0046] Figure 2 It is a side view of the cathode roller of the present invention when a manhole is opened;

[0047] Figure 3 It is a hierarchical diagram corresponding to the titanium plate, the copper plate and the steel plate in the present invention;

[0048] Figure 4 This is a schematic diagram of the structure of the present invention when blocking a manhole;

[0049] Figure 5 This is a cross-sectional view of the cathode roller side plate after welding of the present invention is completed.

[0050] Description of the drawings: 1. Titanium side plate; 2. Manhole; 3. Titanium plate; 4. Copper plate; 5. Steel plate. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] like Figure 1 As shown, this specific embodiment is a method for repairing liquid leakage of a cathode roller for electrolytic copper foil, and the method for repairing liquid leakage of a cathode roller for electrolytic copper foil comprises the following steps:

[0053] S1. Place the cathode roller for electrolytic copper foil on a support frame and fix it;

[0054] S2, cleaning impurities on the titanium side plate 1 by laser cleaning, and grinding the parts to be processed by a grinder;

[0055] S3, opening the ventilation holes on both sides of the cathode roller shaft head, and opening holes of corresponding number and size on the side plate of the cathode roller according to the size of the cathode roller, wherein the holes include air inlet holes and air outlet holes;

[0056] S4, rotating the cathode roller and adjusting the cathode roller to a specified state, introducing inert gas into the cathode roller to replace hydrogen, and replacing hydrogen to a safe concentration within a period of time. After reaching the safe concentration, the cathode roller is adjusted for a second time;

[0057] S5, draw an area containing all the holes on the titanium side plate 1, and open a manhole 2 of corresponding size in the area (such as Figure 2 and Figure 3 As shown), then open manholes 2 of the same size on the copper side plate and the steel side plate in turn;

[0058] S6, cleaning the electrolyte solid crystals and other impurities inside the cathode roller, and performing rust removal treatment on the inside of the cathode roller;

[0059] S7. Use the color penetration method to detect the side plates and welds, and determine whether there are defects such as pores and slag inclusions;

[0060] S8. Counterweight the cathode roller to ensure its balance;

[0061] S9, measuring, marking and cutting the titanium plate 3, the copper plate 4 and the steel plate 5 respectively, and cutting out the titanium plate 3, the copper plate 4 and the steel plate 5 of corresponding sizes;

[0062] S10, sequentially weld the steel plate 5, the copper plate 4 and the titanium plate 3 (such as Figure 4 and Figure 5 shown);

[0063] S11. Use the dye penetrant method to detect whether there are welding defects in the titanium round plate weld and the manually welded weld;

[0064] S12. After the leakage is repaired, transfer to other processes.

[0065] Specifically, the following embodiments are included

[0066] Embodiment 1: comprises the following steps:

[0067] Step 1: Place the cathode roller of the electrolytic copper foil on the support frame and fix it;

[0068] Step 2: Laser clean the residual copper sulfate and oxide skin on the titanium side plate 1, and polish the welds, cracks and potential hazards. The process parameters of the laser cleaning machine are: laser line width of 50 mm, laser pulse frequency of 3 KHz, power adjustment range of 40%, optical fiber length of 8 m, and optical fiber minimum bending radius of 200 mm.

[0069] Step 3: drill the ventilation holes on both sides of the cathode roller shaft head, drill a hole with a diameter of 25mm at the edge of the cathode roller side plate, and drill 3 more holes of the same size within a range of 600mm in diameter near the hole;

[0070] Step 4: Rotate the cathode roller to move the holes at the edge to the top, and then introduce nitrogen into the cathode roller from other holes for 28 hours;

[0071] Step 5: Detect the hydrogen concentration, which is 1.1%, and rotate the hole downward;

[0072] Step 6: Draw an area containing all 25mm holes, first open a manhole with a diameter of 600mm in the area on the titanium side plate 1, and then open a manhole 2 of the same size on the copper side plate and the steel side plate in turn;

[0073] Step 7: Clean the electrolyte solid crystals and other impurities inside the cathode roller, and remove the rust inside the cathode roller;

[0074] Step 8: Use the color penetration method to detect the side panels and welds to determine whether there are defects such as pores and slag inclusions. Spray the penetrant on the side panels and welds, and then let it stand for 18 minutes.

[0075] Step 9: Use a cleaning agent to remove the surface penetrant and wait for 8 minutes;

[0076] Step 10: Apply developer to the side panels and welds and wait for 5 minutes;

[0077] Step 11: Mark the locations of cracks and potential hazards based on the imaged locations;

[0078] Step 12: Use titanium welding rods to weld and repair cracks and potential hazards;

[0079] Step 13: Counterweight the cathode roller to ensure its balance;

[0080] Step 14: Measure, mark and cut the titanium plate 3, copper plate 4 and steel plate 5 respectively, and cut out a steel circular plate with a diameter of 597 mm and a 30° groove, a copper circular plate and a titanium circular plate with a diameter of 620 mm;

[0081] Step 15: Use steel welding rods and steel round plates to weld and repair the steel plate layer. First, manually spot weld four points to fix them; then use automatic welding to weld the steel round plate as a whole. The process parameters of the automatic welding equipment are: welding current 500A, welding voltage 34V, welding speed 300mm / min, wire feeding speed 350mm / min. The parameters of the subsequent copper round plate and titanium round plate welding equipment are the same as above;

[0082] Step 16: Use copper welding rods and copper round plates to weld and repair the copper plate layer. First, manually spot weld four points to fix them, and then use automatic welding to weld the copper round plate as a whole;

[0083] Step 17: Use titanium welding rods and titanium circular plates to weld and repair the titanium side plate 1. First, manually spot weld the joint between the titanium circular plate and the titanium side plate 1, and then use automatic welding to weld the entire circle of the titanium circular plate.

[0084] Step 18: Spray penetrant on the repaired weld and let it sit for 15 minutes;

[0085] Step 19: Use a cleaning agent to remove the surface penetrant and wait for 8 minutes;

[0086] Step 20: Apply developer to the weld, wait for 4 minutes, and check if there is any residual penetrant;

[0087] Step 21: The leak is repaired and transferred to other processes.

[0088] Embodiment 2 comprises the following steps:

[0089] Step 1: Place the cathode roller of the electrolytic copper foil on the support frame and fix it;

[0090] Step 2: Laser clean the residual copper sulfate and oxide scale on the titanium side plate 1, and polish the welds, cracks and potential hazards. The process parameters of the laser cleaning machine are: laser line width of 40 mm, laser pulse frequency of 3 KHz, power adjustment range of 50%, optical fiber length of 8 m, and optical fiber minimum bending radius of 200 mm.

[0091] Step 3: drill the ventilation holes on both sides of the cathode roller shaft head, drill a hole with a diameter of 22mm at the edge of the cathode roller side plate, and drill two more holes of the same size within a range of 550mm in diameter near the hole;

[0092] Step 4: Rotate the cathode roller to move the holes at the edge to the top, and then introduce nitrogen into the cathode roller from other holes for 30 hours;

[0093] Step 5: Detect the hydrogen concentration, which is 1.3%, and rotate the hole downward;

[0094] Step 6: Draw an area containing all 22mm holes, first open a manhole 2 with a diameter of 550mm in the area on the titanium side plate 1, and then open manholes 2 of the same size on the copper side plate and the steel side plate in turn;

[0095] Step 7: Clean the electrolyte solid crystals and other impurities inside the cathode roller, and remove the rust inside the cathode roller;

[0096] Step 8: Use the color penetration method to detect the side panels and welds to determine whether there are defects such as pores and slag inclusions. Spray the penetrant on the side panels and welds and let it stand for 15 minutes.

[0097] Step 9: Use a cleaning agent to remove the surface penetrant and wait for 9 minutes;

[0098] Step 10: Apply developer to the side panels and welds and wait for 4 minutes;

[0099] Step 11: Mark the cracks and potential hazards according to the image location;

[0100] Step 12: Use titanium welding rods to weld and repair cracks and potential hazards;

[0101] Step 13: Counterweight the cathode roller to ensure its balance;

[0102] Step 14: Measure, mark and cut the titanium plate 3, copper plate 4 and steel plate 5 respectively, and cut out a steel circular plate with a diameter of 547 mm and a 30° groove, a copper circular plate and a titanium circular plate with a diameter of 570 mm;

[0103] Step 15: Use steel welding rods and steel round plates to weld and repair the steel plate layer. First, manually spot weld four points to fix them, and then use automatic welding to weld the steel round plate as a whole. The process parameters of the automatic welding equipment are: welding current 4800A, welding voltage 31V, welding speed 280mm / min, wire feeding speed 320mm / min. The parameters of the subsequent copper round plate and titanium round plate welding equipment are the same as above.

[0104] Step 16: Use copper welding rods and copper round plates to weld and repair the copper plate layer. First, manually spot weld four points to fix them, and then use automatic welding to weld the copper round plate as a whole;

[0105] Step 17: Use titanium welding rods and titanium circular plates to weld and repair the titanium side plate 1. First, manually spot weld the joint between the titanium circular plate and the titanium side plate 1, and then use automatic welding to weld the entire circle of the titanium circular plate.

[0106] Step 18: Spray penetrant on the repaired weld and let it sit for 15 minutes;

[0107] Step 19: Use a cleaning agent to remove the surface penetrant and wait for 9 minutes;

[0108] Step 20: Apply developer to the weld, wait for 4 minutes, and check if there is any residual penetrant;

[0109] Step 21: The leak is repaired and transferred to other processes.

[0110] All technical features in this embodiment can be freely combined according to actual needs.

[0111] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for repairing leakage of a cathode roller for electrolytic copper foil, characterized in that: The method for repairing leakage of a cathode roller for electrolytic copper foil comprises the following steps: S1. Place the cathode roller for electrolytic copper foil on a support frame and fix it; S2. Clean the impurities on the titanium side plate by laser cleaning, and grind the parts to be processed by a grinder; S3, opening the ventilation holes on both sides of the cathode roller shaft head, and opening holes of corresponding number and size on the side plate of the cathode roller according to the size of the cathode roller, wherein the holes include air inlet holes and air outlet holes; S4, rotating the cathode roller and adjusting the cathode roller to a specified state, introducing inert gas into the cathode roller to replace hydrogen, and replacing hydrogen to a safe concentration within a period of time. After reaching the safe concentration, the cathode roller is adjusted for a second time; S5. Draw an area containing all the holes on the titanium side plate, and open a manhole of corresponding size in the area, and then open manholes of the same size on the copper side plate and the steel side plate in turn; S6, cleaning the electrolyte solid crystals and other impurities inside the cathode roller, and performing rust removal treatment on the inside of the cathode roller; S7. Use the color penetration method to detect the side plates and welds, and determine whether there are defects such as pores and slag inclusions; S8. Counterweight the cathode roller to ensure its balance; S9, measuring, marking and cutting the titanium plate, copper plate and steel plate respectively, and cutting out titanium plates, copper plates and steel plates of corresponding sizes; S10, welding the steel plate, the copper plate and the titanium plate in sequence; S11. Use the dye penetrant method to detect whether there are welding defects in the titanium round plate weld and the manually welded weld; S12. After the leakage is repaired, transfer to other processes.

2. A method for repairing leakage of a cathode roller for electrolytic copper foil according to claim 1, characterized in that: Impurities on the titanium side plate in S2 include residual copper sulfate and oxide scale, and the parts to be processed in S2 include welds, cracks and places with hidden dangers.

3. A method for repairing leakage of cathode roller for electrolytic copper foil according to claim 1, characterized in that: There is one exhaust hole in the S3, and the exhaust hole is located at the outer edge of the cathode roller. There are 2-4 air inlet holes in the S3.

4. A method for repairing leakage of cathode roller for electrolytic copper foil according to claim 3, characterized in that: The diameter range of the exhaust hole and the air inlet hole is 10-25 mm and is recorded as φ1. The air inlet hole is within the range of 400-600 mm of the exhaust hole, and 400-600 mm is recorded as φ2.

5. The method for repairing leakage of cathode roller for electrolytic copper foil according to claim 1, characterized in that: The specified state in S4 refers to transferring the cathode roller exhaust hole to the top to facilitate the subsequent replacement of hydrogen. The secondary state of the cathode roller in S4 is that all the holes on the side plate are transferred to the bottom.

6. A method for repairing leakage of cathode roller for electrolytic copper foil according to claim 1, characterized in that: The safe concentration of hydrogen in the S4 is less than 1.5%.

7. A method for repairing leakage of cathode roller for electrolytic copper foil according to claim 1, characterized in that: The process of the coloring penetration method in S7 comprises the following steps: A1. Spray penetrant on the side panels and welds, and then leave it alone for a while; A2. Use a cleaning agent to remove the surface penetrant and dry it for a while; A3. After drying, apply developer to the side panels and welds and wait for a while; A4. Mark the cracks and potential hazards according to the imaging location; A5. Use titanium welding rods to weld and repair cracks and potential hazards.

8. A method for repairing leakage of cathode roller for electrolytic copper foil according to claim 7, characterized in that: The resting time in A1 is 15-20 minutes, the drying time in A2 is 8-10 minutes, and the waiting time in A3 is 3-5 minutes.

9. A method for repairing leakage of cathode roller for electrolytic copper foil according to claim 1, characterized in that: The steel plate and copper plate in S9 are both circular plates with a diameter of φ2-3mm and a groove, and the size is recorded as φ3. The titanium plate is a circular plate with a diameter of φ2+20mm and the size is recorded as φ4.

10. The method for repairing leakage of cathode roller for electrolytic copper foil according to claim 1, characterized in that: The welding in S10 includes the following steps: B1. Grind and polish the steel plates, copper plates and titanium plates that need to be processed before welding; B2. Manually spot weld four points to preliminarily fix the plate; B3. After the initial fixation, the plate is welded as a whole circle by automatic welding.

Images