Liquid level control device suitable for electrode foil production

Abstract

The utility model relates to a liquid level control device suitable for electrode foil production, which comprises a mounting rod and a floating block, a floating guide part is arranged at the lower end of the mounting rod, the floating block is movably sleeved on the floating guide part, a reed switch is arranged inside the lower end of the floating guide part, and the reed switch is movably sleeved on the floating guide part. The reed switch is connected with an external control system for controlling liquid supplement through a control lead arranged in the mounting rod, and an annular permanent magnet matched with the reed switch is arranged in the floating block. The automatic liquid supplementing device can achieve automatic liquid supplementing control of the formation process tank, and is simple in overall structure, convenient to install, low in cost, resistant to acid and alkali, good in insulativity, reliable in performance and longer in service life.

Description

Technical Field

[0001] This utility model relates to the field of electrode foil production technology, specifically a liquid level control device suitable for electrode foil production. Background Technology

[0002] The production process of electrode foil involves two steps: etching and formation, transforming optical foil into electrode foil. The main component of the etching and formation process is the electrochemical reaction within the process tank. This electrochemical reaction has two main characteristics: first, the product itself and the process tank solution undergo an electrochemical reaction through high voltage (1000V) and high current (1500A); second, the solution participating in the reaction in the process tank is either acidic or alkaline. To ensure a stable and controllable reaction process, strict requirements are placed on the acid / alkali concentration, temperature, and tank liquid level within the formation tank. Traditional methods for controlling the liquid level in the formation process tank utilize ball valves, level switches, or automatic water replenishment valves.

[0003] One existing method for controlling the liquid level in a chemical formation process tank involves manually opening a ball valve on the replenishment pipeline during regular inspections, while simultaneously monitoring the replenishment process and manually closing the ball valve once the tank is full. This method relies heavily on manual opening and closing of the ball valve and other devices, making it inconvenient to operate. Furthermore, when multiple tanks require replenishment simultaneously, it is prone to issues such as delayed replenishment or delayed pipeline closure due to insufficient manual observation.

[0004] Another control method in the prior art is to use a duckbill-type liquid level switch for automatic control. The liquid level switch applies different pressures to the liquid inlet through the displacement of the float and the connecting rod to open or close the liquid inlet. However, in order to ensure that the buoyancy of the float is large enough, the float is large in size and requires sufficient installation space. In addition, the float is hollow inside and is prone to water ingress, which can reduce buoyancy and lead to the liquid inlet not being able to close in time, causing the liquid in the tank to overflow. Furthermore, this type of liquid level switch has a high failure rate.

[0005] Another control method in the prior art is to use an automatic replenishing valve to automatically replenish the liquid. The automatic replenishing valve opens or closes the water inlet inside the valve by the displacement of the internal float. However, since the float is a hollow structure to ensure buoyancy, steam can easily enter the float. After a period of use, condensation and water accumulation inside the float will make it more difficult to move. In addition, the device shell has poor corrosion resistance and is prone to aging and flaking when immersed in acidic or alkaline high-temperature solutions for a long time, which will affect the product quality.

[0006] In addition, existing conventional level switches or automatic control valves are applicable to low temperatures (less than 60℃), have low insulation requirements (less than 500V), and are mostly used in neutral liquids such as pure water and tap water. These cannot meet the special requirements of level control in electrode foil formation process tanks, because the formation tank solution has special conditions such as high temperature, acid, alkali, and electrical charge.

[0007] Patent CN202533814U discloses an automatic level control device for the electrolytic cell formation tank in an electronic foil production line. This device uses corrosion-resistant, high-temperature-resistant, and high-strength photoelectric level sensors to control the level in the formation tank, but the components of this device are relatively expensive. Patent CN212750715U discloses a corrosion-resistant float level switch, but this switch is not specifically designed for electrode foil formation tanks, and its structure is relatively complex. For example, the filter assembly includes a sleeve, through hole, activated carbon, filter screen, support rod, cover plate, bracket, round rod, locking rod, torsion spring, locking groove, and lever. Utility Model Content

[0008] The purpose of this invention is to provide a liquid level control device suitable for electrode foil production, which can realize automatic liquid replenishment control of the formation process tank. It has a simple overall structure, is easy to install and has low cost. It is also resistant to acid and alkali, has good insulation, reliable performance and longer service life.

[0009] The purpose of this utility model is achieved through the following technical solutions:

[0010] A liquid level control device suitable for electrode foil production includes a mounting rod and a float. The lower end of the mounting rod is provided with a floating guide, and the float is movably sleeved on the floating guide. The lower end of the floating guide is provided with a reed switch, and the reed switch is connected to an external control system for liquid replenishment via a control lead provided in the mounting rod. The float is provided with an annular permanent magnet that cooperates with the reed switch.

[0011] The floating guide section has a lower limit block at its lower end and an upper limit nut at its upper end.

[0012] The lower limit block and the floating guide are an integral structure.

[0013] The mounting rod has a connecting part on its upper side, and the upper end of the connecting part has two fixing nuts, which are clamped on the top plate of the chemical formation process tank.

[0014] The formation process tank is replenished with liquid through a replenishment pipeline, and the replenishment pipeline is equipped with a solenoid valve that controls the opening and closing of the pipeline. The solenoid valve is connected to the control system through a circuit.

[0015] The mounting rod and float are made of polyvinylidene fluoride.

[0016] The advantages and positive effects of this utility model are as follows:

[0017] 1. This utility model utilizes the annular permanent magnet inside the float block in conjunction with the reed switch inside the floating guide to achieve liquid replenishment control. This control method has a simple structure, which reduces the cost of the device, and the technology is mature and reliable, which can ensure reliable control.

[0018] 2. The mounting rod and float of this utility model are both made of PVDF (polyvinylidene fluoride) material, which can resist high temperature, acid and alkali and has good insulation performance. This further ensures the reliability of the performance of this utility model and a longer service life.

[0019] 3. The floating guide part of the mounting rod of this utility model adopts an integrated design, and the diameter and wall thickness are increased to further reduce deformation and improve insulation performance. The float is formed in one piece using a foaming process to replace the existing hollow float ball. This can avoid the problem of the float ball not being able to float due to the accumulation of water caused by steam condensation inside.

[0020] 4. The installation structure of this utility model is simple and can be adjusted according to actual needs, which improves the flexibility of its use. Tightening the upper limit nut can finely adjust the upper limit height of the float, and tightening the fixing nut can finely adjust the installation height of this utility model, thus meeting the needs of chemical formation process tanks with different liquid level requirements. Attached Figure Description

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

[0022] Figure 2 This is a schematic diagram illustrating the usage state of this utility model.

[0023] Figure 3 This is a schematic diagram of a liquid level control method for a chemical formation process tank in the prior art.

[0024] Figure 4 This is a schematic diagram of another method for controlling the liquid level in a chemical formation process tank in the prior art.

[0025] Figure 5 This is a schematic diagram of another liquid level control method for chemical formation process tanks in the prior art.

[0026] Among them, 1 is the mounting rod, 101 is the floating guide, 1011 is the upper limit nut, 1012 is the lower limit block, 102 is the connecting part, 1021 is the fixing nut, 103 is the reed switch, 104 is the control lead, 2 is the float, 201 is the annular permanent magnet, 3 is the chemical formation process tank, 301 is the top plate, 4 is the liquid replenishment pipeline, 401 is the solenoid valve, 5 is the ball valve, 6 is the liquid replenishment pump, 7 is the liquid replenishment tank, 8 is the liquid level switch, 9 is the automatic liquid replenishment valve, and 10 is the control system. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings.

[0028] like Figures 1-2 As shown, this utility model includes a mounting rod 1 and a float 2. The mounting rod 1 has a floating guide part 101 at its lower end, and the float 2 is movably sleeved on the floating guide part 101. The floating guide part 101 has a reed switch 103 inside its lower end, and the reed switch 103 is connected to an external control system 10 for liquid replenishment via a control lead 104 provided in the mounting rod 1. The float 2 has an annular permanent magnet 201 that cooperates with the reed switch 103. When this invention is in operation, the float 2 rises and falls along the floating guide 101 as the liquid level in the formation process tank 3 changes. When the float 2 reaches the lower limit, the annular permanent magnet 201 inside the float 2 overlaps with the reed switch 103 at the lower end of the floating guide 101 to generate an electrical signal, which is transmitted to the control system 10. The control system 10 controls the liquid replenishment pipeline 4 to open to realize automatic liquid replenishment. As the liquid level rises, the float 2 also rises. When the float 2 reaches the upper limit, the annular permanent magnet 201 inside the float 2 and the reed switch 103 at the lower end of the floating guide 101 reach a set distance of relative misalignment, the electrical signal path is interrupted, and the control system 10 controls the liquid replenishment pipeline 4 to automatically stop replenishing liquid. The annular permanent magnet 201 and reed switch 103 are known technologies in the field. For example, see patent CN2490893Y, which uses a reed switch and a permanent magnet to control a wallet alarm. In this patent, the alarm is triggered when the distance between the reed switch and the permanent magnet exceeds 15-20 mm. In contrast, this invention can select a suitable model and specification of reed switch and permanent magnet according to the height required by the change in liquid level to meet the liquid level control needs in the chemical formation process tank 3. In addition, the combination structure of the annular permanent magnet 201 and the reed switch 103 is simple, which reduces the cost of this invention. Moreover, the technology is mature and reliable, which ensures the control reliability of this invention.

[0029] The mounting rod 1 and float 2 of this invention are both made of PVDF (polyvinylidene fluoride) material, which has a maximum temperature resistance of 150℃, is acid and alkali resistant, and has minimal deformation when immersed in a solution at 80-90℃ for a long time. In addition, this material has high insulation performance (withstanding voltage of over 1000V), which can avoid the high voltage of the bath solution from breaking down the insulation of this invention and causing problems such as short circuits in the internal control signals. This improves the stability of this invention and extends its service life.

[0030] The floating guide portion 101 of the mounting rod 1 of this utility model adopts an integrated design and has an increased diameter and wall thickness to further reduce deformation and improve insulation performance, enabling it to withstand higher voltages. In this embodiment, the wall thickness of the floating guide portion 101 is changed from the commonly used 8mm to 12mm, and an integrally formed lower limit block 1012 is provided at the lower end of the floating guide portion 101 to limit the downward displacement of the float 2. In addition, this utility model uses a float 2 formed in one piece by a foaming process to replace the existing hollow float ball, which can avoid the problem of steam condensation and water accumulation inside the float ball, preventing it from floating.

[0031] like Figure 1 As shown, in this embodiment, the floating guide part 101 has an integrally formed lower limit block 1012 at its lower end to limit the downward displacement of the float block 2, and an upper limit nut 1011 at its upper end to limit the upward displacement of the float block 2. Twisting the upper limit nut 1011 to move it can also finely adjust the upper limit height of the float block 2. The upper limit nut 1011 is made of the same material as the float block 2.

[0032] like Figure 1 As shown, in this embodiment, the upper end of the connecting part 102 of the mounting rod 1 is provided with two fixing nuts 1021, such as... Figure 2 As shown, when this utility model is in use, two fixing nuts 1021 clamp the top plate 301 on the formation process tank 3 to achieve the installation and fixation of this utility model, and by turning the fixing nuts 1021 to move them, the installation height of this utility model can be finely adjusted, thereby meeting the needs of the formation process tank 3 with different liquid level requirements.

[0033] like Figure 2 As shown, in this embodiment, the formation process tank 3 is replenished with liquid through a replenishment pipeline 4, and the replenishment pipeline 4 is equipped with a solenoid valve 401 for controlling the opening and closing of the pipeline. The solenoid valve 401 is connected to the control system 10 via a circuit. When this utility model is working, when the float 2 reaches the lower limit position, the annular permanent magnet 201 inside the float 2 overlaps with the reed switch 103 at the lower end of the floating guide part 101 to generate an electrical signal, which is transmitted to the control system 10. The control system 10 then controls the solenoid valve 401 to automatically open, thereby realizing the automatic replenishment of liquid through the replenishment pipeline 4.

[0034] The working principle of this utility model is as follows:

[0035] like Figures 3-5 As shown, the liquid level control method in the existing chemical formation process tank 3 is usually achieved by using ball valves 5, level switches 8, or automatic water replenishment valves 9, among which... Figure 3 As shown, one method in the prior art is to manually inspect and open the ball valve 5 on the replenishment pipeline 4 at regular intervals, while simultaneously starting the replenishment pump 6 to draw liquid from the replenishment tank 7 to begin replenishment. Figure 4 As shown, another method in the prior art is to use a duckbill-type level switch 8 for automatic control. The level switch 8 achieves the opening or closing of the replenishment port by applying different pressures at the replenishment port through the displacement of the float and connecting rod. Figure 5 As shown, another method in the prior art is to use an automatic replenishing valve 9 for automatic replenishment. The automatic replenishing valve 9 opens or closes the internal water inlet by the displacement of an internal float. The above method has problems such as frequent operation, easy water ingress into the float, poor corrosion resistance of the shell, easy insulation breakdown, and short service life.

[0036] And as Figures 1-2 As shown, this utility model first utilizes the annular permanent magnet 201 inside the float block 2 in conjunction with the reed switch 103 inside the floating guide part 101 to achieve control. This control method has a simple structure, which reduces the cost of the device, and the technology is mature and reliable, which ensures the reliability of the control of this utility model.

[0037] Secondly, both the mounting rod 1 and the float 2 of this invention are made of PVDF (polyvinylidene fluoride) material, which is resistant to high temperatures, acids, and alkalis, and has high insulation performance. It exhibits minimal deformation even after long-term immersion in solutions at 80-90 degrees Celsius. This also avoids problems such as insulation breakdown caused by high voltage in the bath solution, resulting in better stability and a longer service life. Furthermore, the floating guide part 101 of the mounting rod 1 adopts an integrated design with increased diameter and wall thickness to further reduce deformation and improve insulation performance. The float 2 is molded in one piece using a foaming process to replace the existing hollow float, thus avoiding the problem of condensation and water accumulation inside the float, preventing it from floating.

[0038] Furthermore, the installation structure of this utility model is simple and can be adjusted according to actual needs, which improves the flexibility of its use. In addition to the lower limit block 1012 integrally formed at the lower end, the floating guide part 101 of the mounting rod 1 is also provided with an upper limit nut 1011 at its upper end. Tightening the upper limit nut 1011 can finely adjust the upper limit height of the float 2. The upper end of the connecting part 102 of the mounting rod 1 is fixed by clamping the top plate 301 on the chemical formation process tank 3 with two fixing nuts 1021. The installation is simple and convenient. Tightening the fixing nuts 1021 can finely adjust the installation height of this utility model, thereby meeting the needs of chemical formation process tanks 3 with different liquid level requirements.

Claims

1. A liquid level control device suitable for electrode foil production, characterized in that: The device includes a mounting rod (1) and a float (2). The mounting rod (1) has a floating guide (101) at its lower end, and the float (2) is movably sleeved on the floating guide (101). The floating guide (101) has a reed switch (103) inside its lower end, and the reed switch (103) is connected to an external control system (10) for fluid replenishment via a control lead (104) located inside the mounting rod (1). The float (2) has an annular permanent magnet (201) that cooperates with the reed switch (103).

2. The liquid level control device for electrode foil production according to claim 1, characterized in that: The floating guide (101) has a lower limit block (1012) at its lower end and an upper limit nut (1011) at its upper end.

3. The liquid level control device for electrode foil production according to claim 2, characterized in that: The lower limit block (1012) and the floating guide (101) are an integral structure.

4. The liquid level control device for electrode foil production according to claim 1, characterized in that: The mounting rod (1) has a connecting part (102) on its upper side, and the connecting part (102) has two fixing nuts (1021) at its upper end, and the two fixing nuts (1021) are clamped on the top plate (301) of the chemical formation process tank (3).

5. The liquid level control device for electrode foil production according to claim 4, characterized in that: The formation process tank (3) is replenished with liquid through a replenishment pipeline (4), and the replenishment pipeline (4) is equipped with a solenoid valve (401) for controlling the opening and closing of the pipeline. The solenoid valve (401) is connected to the control system (10) through a line.

6. The liquid level control device for electrode foil production according to claim 1, characterized in that: The mounting rod (1) and float (2) are made of polyvinylidene fluoride.

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