Automatic acid supplementing device for plate coating and acid spraying

Abstract

The utility model discloses an automatic acid supplementing device for plate coating acid spraying, which comprises a sulfuric acid tank, a pure water tank and an acid spraying pool, a liquid outlet of the sulfuric acid tank is communicated with a first header pipe, a liquid outlet end of the first header pipe is respectively connected with a first connecting pipe and a first branch pipe, and liquid outlet ends of the first connecting pipe and the first branch pipe are communicated with the acid spraying pool. And the main pipe I is provided with a valve H. When the density sensor detects that the acid density in the acid spraying pool is relatively low, the controller opens the electromagnetic valve I, controls the flow of the flow valve I and adds sulfuric acid to increase the acid density in the acid spraying pool, and when the acid spraying density is relatively high, the controller opens the electromagnetic valve II, controls the flow of the flow valve I and adds sulfuric acid to increase the acid density in the acid spraying pool. The flow of the first flow valve is controlled, and pure water is automatically added to reduce the density in the acid spraying pool, so that the density in the acid spraying pool is always maintained in a process standard range, and the purpose of automatically controlling the acid spraying density is achieved.

Description

Technical Field

[0001] This utility model relates to the field of lead-acid battery production technology, and in particular to an automatic acid replenishment device for coating plates. Background Technology

[0002] During the coating process of lead-acid battery plates, dilute sulfuric acid needs to be applied to the freshly coated wet plates. The dilute sulfuric acid reacts with lead oxide, a chemical substance in the wet plates, to form lead sulfate. Lead sulfate forms a protective film on the surface of the wet plates, which slows down the loss of moisture and prevents the wet plates from cracking. In addition, it makes it easier for operators to collect the plates without them sticking to the plates.

[0003] However, during the acid leaching process of wet electrode plates, the acid density continuously decreases due to the chemical reaction between sulfuric acid and lead oxide. This necessitates the periodic replenishment of high-density dilute sulfuric acid to increase the acid density. Therefore, the acid density is constantly changing during the coating process, and this instability significantly impacts the acid content in the wet electrode plates. The varying acid content of the wet electrode plates greatly affects the consistency of the plates. Therefore, an automatic acid replenishment device for coating plates is urgently needed to solve this problem. Utility Model Content

[0004] This utility model addresses the shortcomings of existing technologies by providing the following technical solution:

[0005] An automatic acid replenishment device for coating plate acid leaching includes a sulfuric acid tank, a pure water tank, and an acid leaching pool. The outlet of the sulfuric acid tank is connected to a main pipe. The outlet of the main pipe is connected to a connecting pipe and a branch pipe. The outlets of the connecting pipe and the branch pipe are connected to the acid leaching pool. A valve H is installed on the main pipe, a valve G is installed on the connecting pipe, and a solenoid valve and a flow valve are installed on the branch pipe.

[0006] The outlet of the pure water tank is connected to a main pipe II. The outlet of the main pipe II is connected to a connecting pipe II and a branch pipe II. The outlets of the connecting pipe II and the branch pipe II are both connected to the acid leaching tank. A valve A is installed on the main pipe II, a valve B is installed on the connecting pipe II, and a solenoid valve II and a flow valve II are installed on the branch pipe II. A density sensor is installed in the acid leaching tank. The density sensor, solenoid valve I, solenoid valve II, flow valve I, and flow valve II are all electrically connected to the controller.

[0007] As an improvement to the above technical solution, a circulation pipe is connected to the bottom of the side wall of the acid leaching tank, the outlet end of the circulation pipe is fixedly inserted into the top of the side wall of the acid leaching tank, and a pump body is installed on the circulation pipe.

[0008] As an improvement to the above technical solution, the surface of the circulation pipe is wrapped with a cooling tank, an inlet pipe is connected to the bottom of the side wall of the cooling tank, and an outlet pipe is fixedly connected to the top of the side wall of the cooling tank.

[0009] As an improvement to the above technical solution, a section of the circulation pipe located inside the cooling tank is spiral-shaped.

[0010] The beneficial effects of this utility model are:

[0011] When the density sensor detects that the acid density in the leaching tank is too low, the controller opens solenoid valve one and controls the flow rate of flow valve one to add sulfuric acid to increase the acid density in the leaching tank. When the acid density is too high, the controller opens solenoid valve two and controls the flow rate of flow valve one to automatically add pure water to reduce the density in the leaching tank, so that the density in the leaching tank is always maintained within the process standard range, thereby achieving the purpose of automatic control of the acid density. Through this control method that combines coarse and fine adjustment and is based on real-time density feedback, the solution density in the leaching tank can be accurately adjusted to the preset target value to meet the strict requirements of the production process for acid density. Attached Figure Description

[0012] Figure 1 This is a front view of the overall structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the sulfuric acid tank of this utility model;

[0014] Figure 3 This is a schematic diagram of the pure water tank of this utility model.

[0015] Attached reference numerals: 10, acid bath; 20, sulfuric acid tank; 21, connecting pipe one; 22, valve G; 23, valve H; 24, solenoid valve one; 25, flow valve one; 26, branch pipe one; 30, pure water tank; 31, connecting pipe two; 32, valve B; 33, valve A; 34, solenoid valve two; 35, flow valve two; 36, branch pipe two; 40, circulation pipe; 50, cooling tank; 60, density sensor. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0017] An automatic acid replenishment device for coating plate acid leaching includes a sulfuric acid tank 20, a pure water tank 30, and an acid leaching pool 10. The outlet of the sulfuric acid tank 20 is connected to a main pipe. The outlet of the main pipe is connected to a connecting pipe 21 and a branch pipe 26. The outlets of the connecting pipe 21 and the branch pipe 26 are both connected to the acid leaching pool 10. A valve H23 is installed on the main pipe, a valve G22 is installed on the connecting pipe 21, and a solenoid valve 24 and a flow valve 25 are installed on the branch pipe 26.

[0018] The outlet of the pure water tank 30 is connected to a main pipe 2. The outlet of the main pipe 2 is connected to a connecting pipe 2 31 and a branch pipe 2 36. The outlets of the connecting pipe 2 31 and the branch pipe 2 36 are both connected to the acid leaching tank 10. A valve A33 is installed on the main pipe 2. A valve B32 is installed on the connecting pipe 2 31. A solenoid valve 2 34 and a flow valve 2 35 are installed on the branch pipe 2 36. A density sensor 60 is installed in the acid leaching tank 10. The density sensor 60, solenoid valve 1 24, solenoid valve 2 34, flow valve 1 25, and flow valve 2 35 are electrically connected to the controller.

[0019] In the initial stage, if it is necessary to quickly adjust the total volume or approximate concentration range of the solution, open valves G and B. At this time, sulfuric acid in sulfuric acid tank 20 flows into acid leaching tank 10 in large quantities through connecting pipe 1 21 and pure water in pure water tank 30 through connecting pipe 2 31. Since connecting pipe 1 21 and connecting pipe 2 31 are coarse adjustment pipes, they can quickly change the total amount of liquid and approximate acid-base ratio in the acid leaching tank, so that the solution concentration quickly approaches the target value range.

[0020] As the solution approaches the target concentration range, valves G and B are closed, and solenoid valves 24 and 34 are opened instead, allowing sulfuric acid to flow into the acid leaching tank 10 through branch pipe 26 and pure water through branch pipe 36. Because branch pipes 26 and 36 are fine regulating pipes, and branch pipe 26 has flow valve 25 and branch pipe 36 has flow valve 35, the controller can control the opening and closing of solenoid valves 24 and 34, as well as the flow rate of flow valves 25 and 35, based on the solution density information fed back in real time by density sensor 60.

[0021] When the density sensor 60 detects that the acid density in the acid leaching tank 10 is too low, the controller opens solenoid valve 24 and controls the flow rate of flow valve 25 to add sulfuric acid to increase the acid density in the acid leaching tank 10. When the acid density is too high, the controller opens solenoid valve 34 and controls the flow rate of flow valve 25 to automatically add pure water to reduce the density in the acid leaching tank 10, so that the density in the acid leaching tank 10 is always maintained within the process standard range, thereby achieving the purpose of automatically controlling the acid leaching density. Through this control method that combines coarse and fine adjustment and is based on real-time density feedback, the solution density in the acid leaching tank can be accurately adjusted to the preset target value to meet the strict requirements of the production process for acid leaching density.

[0022] In one embodiment, reference Figure 1 A circulation pipe 40 is connected to the bottom of the side wall of the acid leaching tank 10. The outlet end of the circulation pipe 40 is fixedly inserted into the top of the side wall of the acid leaching tank 10. A pump body is installed on the circulation pipe 40. When the pump body is started, the circulation pipe 40 starts to work and draws liquid from the bottom of the side wall of the acid leaching tank 10. Due to the location of the addition of sulfuric acid and pure water, there may be differences in the acid density of the liquid in different areas of the tank. After the liquid at the bottom is drawn into the circulation pipe 40, it flows along the pipe under the power of the pump and is then reinjected into the tank from the top of the side wall of the acid leaching tank 10. The liquid injected from the top has a certain flow velocity and kinetic energy. During the process of falling into the tank, it will generate strong impact and disturbance with the liquid originally present in the tank, promoting convection and diffusion between the liquids. This circulation flow makes the sulfuric acid and pure water in the tank quickly mix and evenly distribute.

[0023] In one embodiment, the surface of the circulation pipe 40 is wrapped with a cooling tank 50. An inlet pipe is connected to the bottom of the side wall of the cooling tank 50, and an outlet pipe is fixedly connected to the top of the side wall of the cooling tank 50. The section of the circulation pipe 40 inside the cooling tank 50 is spiral-shaped. Since heat is released during the dilution of sulfuric acid, coolant flows into the cooling tank 50 from the inlet pipe. The coolant in the cooling tank 50 flows around the spiral circulation pipe 40. Because the temperature of the solution in the circulation pipe 40 is higher than that of the coolant, according to the principle of heat transfer, the heat of the solution in the circulation pipe 40 is transferred to the coolant through the pipe wall, thereby cooling the solution in the circulation pipe 40. Since the section of the circulation pipe 40 inside the cooling tank 50 is spiral-shaped, this spiral structure greatly increases the residence time of the solution in the circulation pipe 40 in the cooling tank 50 and the contact area with the cooling tank 50.

[0024] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. An automatic acid replenishment device for plate acid spraying, characterized in that, The system includes a sulfuric acid tank (20), a pure water tank (30), and an acid leaching tank (10). The outlet of the sulfuric acid tank (20) is connected to a main pipe. The outlet of the main pipe is connected to a connecting pipe (21) and a branch pipe (26). The outlets of the connecting pipe (21) and the branch pipe (26) are connected to the acid leaching tank (10). A valve H (23) is installed on the main pipe. A valve G (22) is installed on the connecting pipe (21). A solenoid valve (24) and a flow valve (25) are installed on the branch pipe (26). The outlet of the pure water tank (30) is connected to a main pipe II. The outlet of the main pipe II is connected to a connecting pipe II (31) and a branch pipe II (36). The outlets of the connecting pipe II (31) and the branch pipe II (36) are connected to the acid leaching tank (10). A valve A (33) is installed on the main pipe II. A valve B (32) is installed on the connecting pipe II (31). A solenoid valve II (34) and a flow valve II (35) are installed on the branch pipe II (36). A density sensor (60) is installed in the acid leaching tank (10). The density sensor (60), solenoid valve I (24), solenoid valve II (34), flow valve I (25), and flow valve II (35) are electrically connected to the controller.

2. The automatic acid replenishment device for plate acid spraying according to claim 1, characterized in that: A circulation pipe (40) is connected to the bottom of the side wall of the acid leaching tank (10). The outlet end of the circulation pipe (40) is fixedly inserted into the top of the side wall of the acid leaching tank (10). A pump body is provided on the circulation pipe (40).

3. The automatic acid replenishment device for plate acid spraying according to claim 2, characterized in that: The surface of the circulation pipe (40) is covered with a cooling tank (50), and a water inlet pipe is connected to the bottom of the side wall of the cooling tank (50), and a water outlet pipe is fixedly connected to the top of the side wall of the cooling tank (50).

4. The automatic acid replenishment device for plate acid spraying according to claim 3, characterized in that: The section of the circulation pipe (40) located inside the cooling tank (50) is spiral-shaped.

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