A storage tank for copper foil production

Abstract

This utility model relates to the field of copper foil production technology and provides a storage tank for copper foil production, including a tank body with a cover. A reflux pipe is connected to the outside of the tank body, and a constant-temperature pipeline is provided inside the tank body. The constant-temperature pipeline includes an outer pipe and an inner pipe that are interconnected. The tank body includes an inner cylinder and an outer cylinder, which are combined to form a receiving cavity. The inner diameter of the outer pipe contacts the inner wall of the storage receiving cavity, and the outlet end of the outer pipe is connected to the reflux pipe. An installation shell is provided outside the tank body, and the installation shell has two inlet pipes corresponding to the constant-temperature pipeline. A hot / cold switching unit is provided between the two inlet pipes and the inlet of the outer pipe. By setting up a constant-temperature pipeline, including an outer pipe and an inner pipe that are interconnected, with the inner pipe spirally located inside the tank body and the outer pipe spirally located inside the storage receiving cavity, this utility model can increase the contact area with the copper foil liquid inside the tank, improve heat exchange efficiency, and better maintain the constant temperature of the copper foil liquid.

Description

Technical Field

[0001] This utility model relates to the field of copper foil production technology, and in particular to a storage tank for copper foil production. Background Technology

[0002] Copper sulfate solution is a common inorganic compound solution. Due to its active chemical properties and ease of preparation, it has wide applications in various fields such as industry, agriculture, medicine, and scientific research. Copper sulfate solution is the core electrolyte for electrolytic copper foil and copper electroplating. During electrolysis, Cu²⁺ in the solution migrates towards the cathode (the workpiece to be plated) under the action of direct current and is reduced to metallic copper, which is uniformly deposited on the surface of the workpiece to form a dense copper plating layer.

[0003] Untreated copper sulfate solutions are generally between 15 and 30 degrees Celsius at room temperature and are stored in storage tanks. At low temperatures, copper sulfate crystals may precipitate in the electrolyte, leading to a decrease in concentration and uneven composition, which affects the subsequent electrolysis process. High temperatures may accelerate the hydrolysis or oxidation of impurities in the electrolyte (such as iron and nickel ions), generating precipitates (such as iron hydroxide), which contaminate the electrolyte and block the pipeline.

[0004] To maintain a constant temperature of the copper sulfate solution in the storage tank, heating elements are typically installed at the bottom or side wall of the tank to heat and keep the liquid inside. A temperature sensing unit is also installed inside the tank, usually on the inner wall. This causes the temperature of the liquid at the edge of the tank to rise first, followed by the temperature in the middle of the tank, resulting in a temperature difference between the edge and the middle of the liquid. This causes a deviation in the temperature reading on the sensing unit. Utility Model Content

[0005] The purpose of this invention is to provide a storage tank for copper foil production, which can effectively maintain a constant temperature of the copper foil liquid inside the tank through the outer and inner tubes. The hot and cold switching unit uses the effect of thermal expansion and contraction to automatically switch between the two inlet pipes, ensuring a constant temperature of the copper foil liquid inside the tank.

[0006] The present invention adopts the following technical solution: a storage tank for copper foil production, comprising a tank body, a cover installed on the tank body, a feed pipe provided on the cover, a return pipe connected to the outside of the tank body, and a constant temperature pipeline provided inside the tank body, the constant temperature pipeline comprising an outer pipe and an inner pipe that are interconnected.

[0007] The tank includes an inner cylinder and an outer cylinder arranged coaxially. The inner cylinder and the outer cylinder are combined to form a receiving cavity for storing the outer tube. The outlet end of the outer tube is connected to a return pipe.

[0008] The tank body is provided with an installation shell, and the installation shell is provided with two inlet pipes corresponding to the constant temperature pipeline. A hot and cold switching unit is provided between the two inlet pipes and the inlet of the outer pipe.

[0009] Preferably, the inner tube is spirally located inside the tank and coaxially arranged with the tank, and the outer tube is spirally arranged, with the inner diameter of the outer tube contacting the inner wall of the receiving cavity.

[0010] Preferably, the hot / cold switching unit includes an adjusting component and a sensing pipe. The adjusting component is located inside the mounting housing and connected to the inlet end of the outer pipe. The adjusting component is connected to two inlet pipes and the outer pipe respectively. A control switch is provided inside the adjusting component to control the closure of the two inlet pipes. The inner end of the sensing pipe passes through the outer pipe and the inner pipe and extends into the tank to contact the liquid. The open end of the sensing pipe is provided with a push rod corresponding to the control switch. An expansion material is filled between the sensing pipe and the push rod.

[0011] Preferably, the expanded material is glycerol or ethylene glycol.

[0012] Preferably, the control switch includes two stops that slide within the adjusting member, and a connecting rod is provided between the two adjusting members to ensure that the two adjusting members move synchronously.

[0013] Preferably, an elastic element is provided between the control switch and the adjusting element, and the elastic element is located between the stop block and the adjusting element.

[0014] Preferably, the adjusting member is vertically arranged, the two inlet pipes are arranged vertically, the stop block slides along the height direction of the adjusting member, and the upper end of the top rod passes through the adjusting member and is connected to one of the stop blocks.

[0015] Preferably, the lower end of the top rod is provided with a sealing rubber ring.

[0016] Preferably, the mounting shell and adjusting components are located below the tank body.

[0017] Preferably, the two inlet pipes are arranged left and right, the adjusting member is arranged laterally, the two stops slide along the length of the adjusting member, and a driving rod is connected to the side of the stop near the top rod. One end of the driving rod passes through the adjusting member and has a downward inclined surface. The upper end of the top rod has an inclined surface, and the inclined surface of one end of the driving rod cooperates with the upper end of the top rod.

[0018] The beneficial effects of this utility model are:

[0019] 1. By setting up constant temperature pipelines, including interconnected outer and inner pipes, with the inner pipe spirally located inside the tank and the outer pipe spirally located inside the storage cavity, the contact area with the copper foil liquid inside the tank can be increased, improving heat exchange efficiency and better maintaining the constant temperature of the copper foil liquid.

[0020] 2. The hot and cold switching unit can automatically switch between cold and hot pipes according to the temperature of the copper foil liquid inside the tank, so as to achieve precise control of the medium temperature in the constant temperature pipeline and ensure the constant temperature of the liquid inside the tank. The hot and cold switching unit uses the thermal expansion and contraction characteristics of the expander to drive the movement of the stop block. It has a simple structure, sensitive response, and does not require complex electrical control components, thus reducing costs and failure rate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the tank body of this utility model;

[0022] Figure 2 This is a cross-sectional structural diagram of the tank body of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the constant temperature pipeline of this utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the mounting shell of this utility model;

[0025] Figure 5 This is a schematic diagram of the internal structure of the adjusting component of this utility model;

[0026] Figure 6 This is a top cross-sectional view of another embodiment of the adjusting component of this utility model;

[0027] Figure 7 This utility model Figure 6 A front view schematic diagram of the fit between the push rod and the drive rod.

[0028] In the picture:

[0029] 1. Tank body; 2. Cover; 3. Mounting shell; 4. Thermostatic pipe; 5. Sensing pipe; 6. Top rod; 7. Stop block; 11. Return pipe; 12. Drain pipe; 101. Inner cylinder; 102. Outer cylinder; 103. Receiving cavity; 21. Feed pipe; 31. Inlet pipe; 32. Adjusting component; 33. Elastic component; 301. Cold pipe; 302. Hot pipe; 41. Outer pipe; 42. Inner pipe; 51. Expansion material; 71. Connecting rod; 72. Drive rod. Detailed Implementation

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0031] Example 1

[0032] like Figures 1 to 5 As shown, this utility model provides a storage tank for copper foil production, including a tank body 1, a cover 2 installed on the tank body 1, a feed pipe 21 provided on the cover 2, and a sealing switch on the feed pipe 21 to prevent dust from the outside air from entering the tank body 1. A constant temperature pipe 4 is provided inside the tank body 1, and a drain pipe 12 for draining the liquid inside the tank body 1 is provided on the tank body 1, with a flow switch on the drain pipe 12. The constant temperature pipe 4 includes an outer pipe 41 and an inner pipe 42 that are interconnected. The inner pipe 42 is spirally located inside the tank body 1 and coaxially arranged with the tank body 1. The tank body 1 includes an inner cylinder 101 and an outer cylinder 101 arranged coaxially. The inner cylinder 101 and outer cylinder 102 are combined to form a receiving cavity 103 for storing the outer tube 41. The outer tube 41 is spirally arranged, and the inner diameter of the outer tube 41 contacts the inner wall of the receiving cavity 103. A return pipe 11 is connected to the outside of the tank body 1, and the outlet end of the outer tube 41 is connected to the return pipe 11. The spiral pipe structure of the outer tube 41 and the inner tube 42 prolongs the residence time of the medium in the tank body 1 and increases the contact area with the liquid. The synergistic effect of the outer tube 41 and the inner tube 42 ensures the uniformity of temperature regulation and avoids local overcooling or overheating, thereby achieving constant temperature control during the liquid storage process.

[0033] The tank body 1 is provided with an installation shell 3 on the outside. The installation shell 3 is provided with two inlet pipes 31 corresponding to the constant temperature pipe 4. That is, the two inlet pipes 31 correspond to the inlet of the outer pipe 41. The two inlet pipes 31 are arranged vertically. The two inlet pipes 31 are a cold pipe 301 and a hot pipe 302, respectively. A cold and hot switching unit is provided between the two inlet pipes 31 and the inlet of the outer pipe 41. The cold and hot switching unit switches the cold pipe 301 and the hot pipe 302 according to the temperature of the liquid inside the tank body 1 to ensure the constant temperature of the liquid inside the tank body 1.

[0034] To maintain a constant internal temperature in the thermostatic pipe 4, in this embodiment, the hot / cold switching unit includes an adjusting element 32 and an induction pipe 5. The adjusting element 32 is a housing with a sealed cavity. The adjusting element 32 is located inside the mounting housing 3 and connected to the inlet end of the outer pipe 41. The adjusting element 32 is vertically arranged and communicates with two inlet pipes 31 and the outer pipe 41 respectively. A control switch is provided inside the adjusting element 32. The control switch includes two stops 7 that slide within the adjusting element 32. The stops 7 slide along the height direction of the adjusting element 32. A space is provided between the two adjusting elements 32. A connecting rod 71 is provided to ensure that the two adjusting components 32 move synchronously. The sensing pipe 5 is L-shaped and is installed on the tank body 1. The inner end of the sensing pipe 5 passes through the outer pipe 41 and the inner pipe 42 and extends into the tank body 1 to contact the liquid. A push rod 6 is provided inside the outer end of the sensing pipe 5. The lower end of the push rod 6 slides inside the sensing pipe 5, and the upper end of the push rod 6 passes through the adjusting component 32 and is connected to one of the stop blocks 7. An expansion material 51 is filled between the sensing pipe 5 and the push rod 6. The expansion material 51 is glycerol or ethylene glycol. The volume expansion coefficient of glycerol is approximately 5.3 × 10⁻⁶. −4 ℃ ⁻¹ (That is, for every 1°C increase in temperature, the volume increases by approximately 0.053%), the coefficient of volume expansion of ethylene glycol is approximately 6.3 × 10⁻⁶. −4 ℃ ⁻¹ That is, for every 1°C increase in temperature, the volume increases by approximately 0.063%. The thermal expansion of ethylene glycol or glycerol can theoretically serve as a small driving source.

[0035] In the above scheme, initially, the cold pipe 301 is in a blocked state, and the hot pipe 302 is in an open state and connected to the outer pipe 41. When the temperature of the liquid inside the tank 1 rises, the expansion material 51 inside the sensing pipe 5 will expand in volume due to heat. The expansion material 51 pushes the two stops 7 to rise simultaneously through the push rod 6, causing the cold pipe 301 to open and the hot pipe 302 to slowly close or reduce the flow rate. When the temperature of the liquid inside the tank 1 decreases, the expansion material 51 contracts in volume due to cold. Since the push rod 6 is sealed to the sensing pipe 5, the expansion material 51 will pull the two stops 7 to move down simultaneously through the push rod 6 when it contracts, causing the hot pipe 302 to open and the cold pipe 301 to slowly close or reduce the flow rate, thereby maintaining a constant temperature of the liquid inside the tank 1.

[0036] In order to enable the stop 7 to quickly return to its original position after being moved, an elastic element 33 is provided between the other stop 7 and the adjusting member 32. The elastic element 33 is a spring.

[0037] In order to prevent leakage of the expansion material 51 inside the sensing pipe 5 and to ensure the sealing of the sensing pipe 5, a sealing rubber ring is provided at the lower end of the top rod 6 in this embodiment.

[0038] The tank body 1 and the cover body 2 form a sealed space inside the tank body 1. In the sealed space, heat loss is mainly due to the suppression of evaporation and air convection. The liquid at the bottom is more likely to dissipate heat through the bottom of the container or the inner wall of the container, causing "lower temperature and higher temperature" convection. Therefore, the liquid at the bottom of the container will cool down first. In order to adjust the temperature inside the tank body 1 in time, the mounting shell 3 and the adjusting component 32 are located below the tank body 1.

[0039] Working principle:

[0040] In the initial state, one of the blocks 7 blocks the cold pipe 301, so that the hot pipe 302 is connected to the constant temperature pipe 4. When the liquid temperature in the tank 1 deviates from the set threshold, since the sensing end of the sensing pipe 5 is located in the liquid inside the tank 1, the expansion material 51 in the sensing pipe 5 will shrink or expand due to the temperature change, which will push the top rod 6 to move the block 7, triggering the cold and hot switching unit to switch the connection state of the cold pipe 301 or the hot pipe 302.

[0041] When the liquid temperature rises to the preset maximum value, the expansion material 51 expands in volume due to heat, causing the push rod 6 to move upward. The two stops 7 slide synchronously. One of the stops 7 is misaligned with the cold pipe 301, opening the opening of the cold pipe 301. The other stop 7 slowly closes the hot pipe 302. The low-temperature medium (such as cold water or coolant) inside the cold pipe 301 enters the inner pipe 42 through the outer pipe 41 and comes into direct contact with the liquid. It absorbs the heat of the liquid through heat conduction. The outer pipe 41 is spirally distributed along the inner wall of the storage and receiving cavity 103. It indirectly absorbs the heat from the side wall of the tank 1 by utilizing the thermal conductivity of the inner cylinder 101. The two pipes form a "pincer attack" heat exchange mode, which greatly improves the heat dissipation efficiency.

[0042] When the liquid temperature is lower than the set value, the expansion element 51 shrinks due to the cold. Under the restoring force of the elastic element 33 and the pull of the expansion element 51, the two baffles 7 close the cold pipe 301 and slowly open the hot pipe 302. The high-temperature medium (such as hot water, hot oil or hot air) enters the regulating element 32 through the inlet pipe 31 and then flows to the outer pipe 41 and the inner pipe 42. At this time, the inner pipe 42 directly releases cold energy to the liquid, while the outer pipe 41 absorbs external heat through the inner cylinder 101 and transfers it to the liquid. The temperature balance is maintained through bidirectional heating. The medium that has completed the heat exchange is finally discharged through the return pipe 11 at the outlet end of the outer pipe 41, forming a closed loop.

[0043] Example 2

[0044] like Figure 6 and Figure 7As shown, two inlet pipes 31 are arranged on the left and right, and the adjusting member 32 is arranged horizontally. Two blocks 7 slide along the length of the adjusting member 32. A drive rod 72 is connected to the side of the block 7 near the top rod 6. One end of the drive rod 72 passes through the adjusting member 32. One end of the drive rod 72 has a downward inclined surface. The upper end of the top rod 6 has an inclined surface. The inclined surface of one end of the drive rod 72 cooperates with the upper end of the top rod 6.

[0045] In the above scheme, when the liquid temperature in the tank 1 deviates from the set threshold, the expansion material 51 in the sensing pipe 5 will shrink or expand due to the temperature change, thereby pushing the push rod 6 to move up and down. Through the cooperation between the upper inclined surface of the push rod 6 and the inclined surface of one end of the drive rod 72, the two stops 7 move left and right at the same time, triggering the cold and hot switching unit to switch the connection state of the cold pipe 301 or the hot pipe 302.

[0046] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A storage tank for copper foil production, comprising a tank body (1), a cover (2) mounted on the tank body (1), a feed pipe (21) provided on the cover (2), and a return pipe (11) connected to the outside of the tank body (1), characterized in that, The tank (1) is equipped with a constant temperature pipe (4) inside, which includes an outer pipe (41) and an inner pipe (42) that are connected to each other. The tank (1) includes an inner cylinder (101) and an outer cylinder (102) arranged coaxially. The inner cylinder (101) and the outer cylinder (102) are combined to form a storage and receiving cavity (103) for the outer tube (41). The outlet end of the outer tube (41) is connected to the return pipe (11). The tank (1) is provided with an installation shell (3) on the outside. The installation shell (3) is provided with two inlet pipes (31) corresponding to the constant temperature pipe (4). A hot and cold switching unit is provided between the two inlet pipes (31) and the inlet of the outer pipe (41).

2. The storage tank for copper foil production according to claim 1, characterized in that: The inner tube (42) is spirally located inside the tank (1) and coaxially arranged with the tank (1). The outer tube (41) is spirally arranged, and the inner diameter of the outer tube (41) is in contact with the inner wall of the receiving cavity (103).

3. The storage tank for copper foil production according to claim 1, characterized in that: The hot and cold switching unit includes an adjusting component (32) and an induction pipe (5). The adjusting component (32) is located inside the mounting shell (3) and connected to the inlet end of the outer pipe (41). The adjusting component (32) is connected to two inlet pipes (31) and the outer pipe (41) respectively. The adjusting component (32) is equipped with a control switch to control the closing of the two inlet pipes (31). The inner end of the induction pipe (5) passes through the outer pipe (41) and the inner pipe (42) and extends into the tank (1) to contact the liquid. The open end of the induction pipe (5) is equipped with a top rod (6) corresponding to the control switch. The space between the induction pipe (5) and the top rod (6) is filled with an expansion material (51).

4. The storage tank for copper foil production according to claim 3, characterized in that: The expanded material (51) is glycerol or ethylene glycol.

5. The storage tank for copper foil production according to claim 3, characterized in that: The control switch includes two stops (7) that slide within the adjusting member (32), and a connecting rod (71) is provided between the two adjusting members (32) to ensure that the two adjusting members (32) move synchronously.

6. The storage tank for copper foil production according to claim 5, characterized in that: An elastic element (33) is provided between the control switch and the adjusting element (32), and the elastic element (33) is located between the stop block (7) and the adjusting element (32).

7. The storage tank for copper foil production according to claim 5, characterized in that: The adjusting member (32) is vertically arranged, the two inlet pipes (31) are arranged vertically, the stop block (7) slides along the height direction of the adjusting member (32), and the upper end of the top rod (6) passes through the adjusting member (32) and is connected to one of the stop blocks (7).

8. The storage tank for copper foil production according to claim 3, characterized in that: The lower end of the top rod (6) is provided with a sealing rubber ring.

9. The storage tank for copper foil production according to claim 3, characterized in that: Therefore, the housing (3) and the adjusting component (32) are located below the tank body (1).

10. The storage tank for copper foil production according to claim 5, characterized in that: Two inlet pipes (31) are arranged on the left and right, the adjusting member (32) is arranged laterally, and two stops (7) slide along the length direction of the adjusting member (32). A drive rod (72) is connected to the side of the stop (7) near the top rod (6). One end of the drive rod (72) passes through the adjusting member (32). One end of the drive rod (72) has a downward inclined surface. The upper end of the top rod (6) has an inclined surface. The inclined surface of one end of the drive rod (72) cooperates with the upper end of the top rod (6).

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