A non-impinging liquid inlet device for a foil production machine

Abstract

This invention discloses a non-impact liquid feeding device for a foil production machine, belonging to the field of electrolytic copper foil production technology. It mainly includes an anti-impact component, a liquid feeding box, and a liquid feeding straight end. The upper end of the liquid feeding straight end is connected to the bottom of the anode tank, and the lower end is connected to the upper part of the liquid feeding box. The lower part of the liquid feeding box is provided with an inlet pipe, and the liquid feeding box has a trapezoidal structure that is narrower at the top and wider at the bottom. The anti-impact component includes an anti-impact plate, a diverter plate, and a support rod. The anti-impact plate is arc-shaped, and its curvature matches the curvature of the cathode roller. The diverter plate is connected to the lower center of the anti-impact plate, and the diverter plate is perpendicular to the arc-shaped sectional surface of the anti-impact plate. The lower part of the diverter plate is provided with several limiting holes, and a support rod passes through each limiting hole. The anti-impact plate is located in the anode tank, the diverter plate is located in the liquid feeding box, and both ends of the support rod are fixed to the side plate of the liquid feeding box. This invention improves the problem of impact damage to the cathode roller surface caused by traditional liquid feeding devices, and extends the working life of the cathode roller.

Description

Technical Field

[0001] This invention relates to the field of electrolytic copper foil production technology, and more specifically to a non-impact liquid feeding device for a foil production machine. Background Technology

[0002] With the booming development of the new energy industry, the demand for copper foil is increasing, and copper foil products are becoming increasingly ultra-thin and high-end. As the most mature existing production process, copper foil is typically produced through electroplating using an integrated foil production machine. However, the electroplating process of the foil production machine requires very precise control of the solution flow rate. The solution supply system of the foil production machine, as the primary link in the entire copper foil production process, significantly impacts the quality of the foil. Currently, many liquid mixing devices on the market can only mitigate flow unevenness to a certain extent, and cannot eliminate the impact of the incoming liquid on the cathode roller surface when the electrolyte flow rate or pressure is high. Secondly, when the inlet pressure is low, the flow rate of the liquid entering the anode tank slows down, resulting in poor ion uniformity within the anode tank and affecting the coating effect.

[0003] To address the aforementioned issues, Chinese patent CN207918977U discloses a balance control system for two solutions fed into a foil-making machine. This system includes an upper tank above the anode tank for supplying copper sulfate solution, with inlet buffer boxes located at the upper ports on both sides of the anode tank. A return tank and a mixing tank are sequentially connected below the copper sulfate solution outlet port at the bottom of the anode tank. The upper tank is connected to the mixing tank via a pipeline. A pump in the mixing tank connects to the inlet buffer boxes at the upper ports on both sides of the anode tank. A flow rate control valve for the copper sulfate solution in the anode tank is located between the copper sulfate solution outlet port and the return tank. A secondary copper sulfate solution reuse control valve is located between the return tank and the mixing tank. A primary copper sulfate solution inlet control valve is located between the upper tank and the mixing tank. A main copper sulfate solution supply valve is located between the pump and the inlet buffer boxes at the upper ports. However, this patent controls the inlet ratio using multiple control valves, making operation complex. In actual production, precise and real-time control is difficult to achieve, and the ratio setting is specific, limiting its applicability. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a liquid feeding device for a foil-making machine that enables impact-free liquid feeding, thereby providing technical support for high-quality film formation.

[0005] The technical solution adopted by this invention to solve the technical problem is: a non-impact liquid feeding device for a foil production machine, the liquid feeding device mainly includes an anti-impact component, a liquid feeding box, and a liquid feeding straight end; the upper end of the liquid feeding straight end is connected to the bottom of the anode tank, and the lower end is connected to the upper part of the liquid feeding box; the lower part of the liquid feeding box is provided with a liquid feeding pipe, and the liquid feeding box has a trapezoidal structure that is narrower at the top and wider at the bottom; the anti-impact component includes an anti-impact plate, a diverter plate, and a support rod, the anti-impact plate is arc-shaped, and the arc of the anti-impact plate matches the curvature of the cathode roller; the diverter plate is connected to the lower middle part of the anti-impact plate, and the diverter plate is perpendicular to the arc-shaped cross-section of the anti-impact plate; the lower part of the diverter plate is provided with several limiting holes, and the support rod passes through each of the limiting holes; the anti-impact plate is located in the anode tank, the diverter plate is located in the liquid feeding box, and the two ends of the support rod are fixed to the side plate of the liquid feeding box.

[0006] Furthermore, the liquid inlet box includes an upper box body and a lower box body, which are fixedly connected by an upper connecting part, a lower connecting part, and bolts; the upper box body is connected to the anode tank through the liquid inlet straight end; and the two ends of the support rod are fixed between the upper connecting part and the lower connecting part.

[0007] Furthermore, a sealing gasket is provided between the upper connecting part and the lower connecting part, and the sealing gasket is provided with a plurality of sealing grooves; both ends of the support rod are embedded in the sealing grooves, and the shape of the sealing grooves matches the shape of the ends of the support rod.

[0008] Furthermore, the transition between the anode tank and the end of the liquid inlet straight end is a circular arc transition, and the angle θ1 of the transition arc ranges from 0 to 90°.

[0009] Furthermore, the connection between the impact-resistant plate and the diverter plate adopts a rounded transition, and the angle θ2 of the transition arc ranges from 90 to 110°.

[0010] Furthermore, the tilt angle θ3 of the liquid inlet box side plate ranges from 45° to 70°.

[0011] Furthermore, the height of the liquid inlet box ranges from 120 to 250 mm.

[0012] Furthermore, the thickness of the shock-absorbing plate is 2-5 mm; the straight length of the shock-absorbing plate is 2-3 times the width of the liquid inlet straight end.

[0013] Furthermore, the impact-resistant component is made of titanium.

[0014] The beneficial effects of this invention are as follows: Compared with the prior art, the non-impact liquid feeding device for foil making machines provided by this invention has the following advantages:

[0015] 1) This device is an upgrade to the existing liquid feeding equipment. By setting up anti-impact components, it can perfectly protect the cathode roller surface from the impact of the liquid feeding while retaining the excellent pressure reduction effect of the liquid feeding box. It greatly increases the liquid flow rate at the anode tank inlet, which helps to increase the movement of ions, prevents ion deposition, and improves the uniformity of ions in the electrolyte. It improves the problem of impact damage to the cathode roller surface caused by traditional liquid feeding devices and extends the working life of the cathode roller.

[0016] 2) The device adopts a curved surface connection transition method at the connection between the anode tank and the liquid inlet straight end, and at the connection between the anti-impact plate and the diverter plate. The curvature of the arc is determined according to the simulation results of the flow state of the liquid being introduced, thereby reducing the generation of turbulence and improving the uniformity of the solution. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the liquid inlet device provided in Example 1;

[0018] Figure 2 This is a schematic diagram of the impact-resistant component in Example 1;

[0019] Figure 3 This is a schematic diagram of the support rod in Example 1;

[0020] Figure 4 This is a schematic diagram of the sealing gasket structure in Example 1;

[0021] Figure 5 A schematic diagram of the liquid inlet device in Comparative Example 1;

[0022] Figure 6 This is a schematic diagram of the liquid inlet device in Example 2;

[0023] Figure 7 for Figure 6 A schematic diagram of the local structure of region A in the middle;

[0024] Figure 8 This is a comparison diagram of the simulated pressure distribution between the liquid inlet device of Example 1 and the liquid inlet device of Comparative Example 1;

[0025] Figure 9 This is a comparison diagram of the simulated velocity distribution of the liquid inlet device in Example 1 and the liquid inlet device in Comparative Example 1;

[0026] Figure 10 This is a comparison diagram of the simulated velocity distribution of the liquid inlet device in Example 2 and the liquid inlet device in Example 1.

[0027] Among them, 1. Anode tank; 2. Anti-impact assembly; 21. Anti-impact plate; 22. Diverter plate; 23. Limiting hole; 24. Support rod; 25. Rod head; 3. Liquid inlet straight end; 4. Liquid inlet box; 5. Liquid inlet pipe; 6. Cathode roller; 7. Sealing gasket; 71. Sealing groove; 8. Upper connecting part; 9. Bolt; 10. Lower connecting part; 11. Side plate. Detailed Implementation

[0028] The present invention will be further illustrated below with specific embodiments. However, these examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0029] Example 1

[0030] like Figures 1-4 As shown, a non-impact liquid feeding device for a foil-making machine is disclosed. The device mainly includes an anti-impact component 2, a liquid feeding box 4, and a liquid feeding straight end 3. The anti-impact component 2 is made of titanium. The upper end of the liquid feeding straight end 3 is connected to the bottom of the anode tank 1, and the lower end is connected to the upper part of the liquid feeding box 4. The lower part of the liquid feeding box 4 is provided with a liquid feeding pipe 5, and the liquid feeding box 4 has a trapezoidal structure that is narrower at the top and wider at the bottom. The anti-impact component 2 includes an anti-impact plate 21, a diverter plate 22, and a support rod 24. The anti-impact plate 21 is arc-shaped, and the curvature of the anti-impact plate 21 matches the curvature of the cathode roller 6. The diverter plate 22 is connected to the lower center of the anti-impact plate 21. The flow divider 22 is perpendicular to the arc-shaped cross-section of the anti-impact plate 21; the lower part of the flow divider 22 is provided with a plurality of limiting holes 23, and a support rod 24 is inserted into each limiting hole 23. The support rod 24 passes through the limiting hole 23 and is symmetrical on both sides; the anti-impact plate 21 is located in the anode tank 1, the flow divider 22 is located in the liquid inlet box 4, and the rod heads 25 at both ends of the support rod 24 are fixed to the side plate 11 of the liquid inlet box 4.

[0031] The liquid inlet box 4 includes an upper box body and a lower box body, which are fixedly connected by an upper connecting part 8, a lower connecting part 10, and bolts 9. The upper box body is connected to the anode tank 1 through the liquid inlet straight end 3. The two ends of the support rod 24 are fixed between the upper connecting part 8 and the lower connecting part 10. A sealing gasket 7 is provided between the upper connecting part 8 and the lower connecting part 10, and the sealing gasket 7 has a plurality of sealing grooves 71. The two ends of the support rod 24 are embedded in the sealing grooves 71, and the shape of the sealing grooves 71 matches the shape of the ends of the support rod 24.

[0032] In this embodiment, the foil-making machine has a radius of 3.6m, an inlet width H of 53mm, a liquid inlet box 4 height of 193mm, and an inclination angle θ3 of the side plate 11 of the liquid inlet box 4 of 60°. The inlet width b of the liquid inlet straight end 3 is 20mm, the length L of the liquid inlet straight end 3 is 22mm, and the electrode spacing h is 10mm. The thickness of the impact-resistant plate 21 is 2mm; the straight length of the impact-resistant plate 21 is 2 to 3 times the inner diameter of the liquid inlet straight end 3.

[0033] Example 2

[0034] like Figures 6-7 As shown, a non-impact liquid feeding device for a foil production machine is disclosed. The liquid feeding device mainly includes an anti-impact component 2, a liquid feeding box 4, and a liquid feeding straight end 3. The anti-impact component 2 is made of titanium. The upper end of the liquid inlet straight end 3 is connected to the bottom of the anode tank 1, and the lower end is connected to the upper part of the liquid inlet box 4; the lower part of the liquid inlet box 4 is provided with a liquid inlet pipe 5, and the liquid inlet box 4 has a trapezoidal structure that is narrower at the top and wider at the bottom; the anti-impact component 2 includes an anti-impact plate 21, a diverter plate 22 and a support rod 24, the anti-impact plate 21 is arc-shaped, and the curvature of the anti-impact plate 21 matches the curvature of the cathode roller 6; the diverter plate 22 is connected to the lower middle part of the anti-impact plate 21, and the diverter plate 22 is perpendicular to the arc-shaped cross-section of the anti-impact plate 21; the lower part of the diverter plate 22 is provided with a plurality of limiting holes 23, and the support rod 24 passes through each limiting hole 23, and the support rod 24 is symmetrical on both sides after passing through the limiting hole 23; the anti-impact plate 21 is located in the anode tank 1, the diverter plate 22 is located in the liquid inlet box 4, and the two ends of the support rod 24 are fixed to the side plate 11 of the liquid inlet box 4.

[0035] The liquid inlet box 4 includes an upper box body and a lower box body, which are fixedly connected by an upper connecting part 8, a lower connecting part 10, and bolts 9. The upper box body is connected to the anode tank 1 through the liquid inlet straight end 3. The two ends of the support rod 24 are fixed between the upper connecting part 8 and the lower connecting part 10. A sealing gasket 7 is provided between the upper connecting part 8 and the lower connecting part 10, and the sealing gasket 7 has a plurality of sealing grooves 71. The two ends of the support rod 24 are embedded in the sealing grooves 71, and the shape of the sealing grooves 71 matches the shape of the ends of the support rod 24.

[0036] In this embodiment, the foil-making machine has a radius of 3.6m, an inlet width of 53mm, a liquid inlet box 4 height of 120mm, and an inclination angle θ3 of the side plate 11 of the liquid inlet box 4 of 60°. The inlet width b of the liquid inlet straight end 3 is 20mm, the length L of the liquid inlet straight end 3 is 22mm, and the electrode spacing h is 10mm. The thickness of the anti-impact plate 21 is 2mm; the straight length of the anti-impact plate 21 is 2 to 3 times the inner diameter of the liquid inlet straight end 3. The transition between the anode tank 1 and the end of the liquid inlet straight end 3 is an arc transition, with an arc angle θ1 of 60°; the connection between the anti-impact plate 21 and the diverter plate 22 is an arc transition, with an arc angle θ2 of 100°.

[0037] Comparative Example 1

[0038] like Figure 5 As shown, a liquid feeding device for a foil production machine does not contain the anti-impact component 2, and the rest of the structure is the same as in Embodiment 1.

[0039] By performing dynamic simulation calculations on the liquid inlet device in Example 1 and the liquid inlet device in Comparative Example 1 respectively, since the area between the liquid inlet box 4, the liquid inlet straight end 3, the anode tank 1, and the cathode roller 6 is approximately a regular fluid domain, the computational domain can be simplified using a two-dimensional model. First, the model is meshed; then, the mesh is imported into the simulation software, and after determining the inlet / outlet and boundary conditions, dynamic simulation calculations are performed. The calculation results are as follows: Figure 8 and 9 As shown.

[0040] Calculations revealed that, compared to the liquid inlet device in Comparative Example 1, the maximum pressure on the roller surface of the new device in Example 1, after adding the anti-shock component 2, decreased by 36%; and the area of ​​the high-speed zone at the liquid inlet of the anode tank 1 increased by approximately two times. This indicates that the new device effectively protects the roller surface of the cathode roller 6, while significantly increasing the liquid flow rate at the liquid inlet of the anode tank 1, which helps to increase ion movement, prevent ion deposition, and improve the uniformity of ions in the electrolyte.

[0041] By performing dynamic simulation calculations on the liquid inlet device in Example 2 and the liquid inlet device in Example 1 respectively, since the area between the liquid inlet box 4, the liquid inlet straight end 3, the anode tank 1, and the cathode roller 6 is approximately a regular fluid domain, the computational domain can be simplified using a two-dimensional model. First, the model is meshed; then, the mesh is imported into the simulation software, and after determining the inlet / outlet and boundary conditions, dynamic simulation calculations are performed. The calculation results are as follows: Figure 10As shown. Calculations revealed that, compared to the liquid inlet device in Example 1, the use of arc transitions at the end transition points between the anode tank 1 and the liquid inlet straight end 3, and between the anti-impact plate 21 and the diverter plate 22 in Example 2, resulted in more uniform fluid flow within the tank, and the area of ​​the turbulent distribution region within the tank was reduced by 30% compared to the original.

[0042] The above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also fall within the scope of the present invention, and the patent protection scope of the present invention should be defined by the claims.

Claims

1. A non-impinging liquid inlet device for a foil production machine, characterized by: The liquid inlet device mainly comprises an anti-impact assembly, a liquid inlet box and a liquid inlet straight end; the upper end of the liquid inlet straight end is connected to the bottom of the anode groove, and the lower end is connected to the upper part of the liquid inlet box; the lower part of the liquid inlet box is provided with a liquid inlet pipe, and the liquid inlet box has a trapezoidal structure with a narrow upper part and a wide lower part; the anti-impact assembly comprises an anti-impact plate, a flow distribution plate and a support rod, the anti-impact plate is arc-shaped, and the curvature of the anti-impact plate matches the curvature of the cathode roller; the flow distribution plate is connected to the middle part below the anti-impact plate, and the flow distribution plate is perpendicular to the arc-shaped surface of the anti-impact plate; the lower part of the flow distribution plate is provided with a plurality of limiting holes, and the support rod is arranged in each limiting hole; the anti-impact plate is located in the anode groove, the flow distribution plate is located in the liquid inlet box, and the two ends of the support rod are fixed on the side plates of the liquid inlet box; the transition between the anode groove and the end of the liquid inlet straight end adopts a circular arc transition, and the angle θ1 of the transition circular arc ranges from 0 to 90 degrees; the connection between the anti-impact plate and the flow distribution plate adopts a circular arc transition, and the angle θ2 of the transition circular arc ranges from 90 to 110 degrees.

2. A non-impinging liquid inlet device for a foil production machine as claimed in claim 1, characterized in that: The liquid inlet box comprises an upper box body and a lower box body, and the upper box body and the lower box body are fixedly connected through an upper connecting part, a lower connecting part and bolts; the upper box body is connected with the anode groove through the liquid inlet straight end; the two ends of the support rod are fixed between the upper connecting part and the lower connecting part.

3. A non-impinging liquid inlet device for a foil production machine as claimed in claim 2, characterized in that: A sealing gasket is arranged between the upper connecting part and the lower connecting part, and a plurality of sealing grooves are arranged on the sealing gasket; the two ends of the support rod are embedded in the sealing grooves, and the shape of the sealing grooves matches the shape of the end part of the support rod.

4. A non-impinging liquid inlet device for a foil production machine as claimed in claim 1, characterized in that: The inclination angle θ3 of the side plate of the liquid inlet box ranges from 45 to 70 degrees.

5. A non-impinging liquid inlet device for a foil production machine as claimed in claim 1, characterized in that: The height of the liquid inlet box ranges from 120 to 250 mm.

6. A non-impinging liquid inlet device for a foil production machine as claimed in claim 1, characterized in that: The thickness of the anti-impact plate is 2-5 mm, and the straight line length of the anti-impact plate is 2-3 times the width of the liquid inlet straight end inlet.

7. A non-impinging liquid inlet device for a foil production machine as claimed in claim 1, characterized in that: The material of the anti-impact assembly is titanium.

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