Self-heat-preservation acid etching liquid storage device
By combining a stirring rod with a water bath, the problems of component stratification and volatile gas escape during the storage of acidic etching solution were solved. This enabled uniform heating and gas recovery of the acidic etching solution, improving storage quality and reducing energy consumption.
Patent Information
- Application Number
- CN202520557778.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-03-27
AI Technical Summary
Existing acid etching solution storage devices lack a dynamic mixing mechanism, leading to component stratification or solid particle precipitation. Excessively high local temperatures accelerate decomposition, and the release of volatile gases affects solution concentration and gas pressure, increasing energy consumption.
The system employs a rotating stirring rod and paddle for stirring, combined with a water bath and hose system to recover volatile gases for heat exchange, thereby achieving uniform heating of the acidic etching solution and gas recycling, and maintaining a dynamic balance of temperature and pressure within the storage tank.
It prevents etching solution from separating and settling, provides uniform heating to reduce energy consumption, maintains stable solution concentration, reduces the escape of volatile gases, improves storage quality, and achieves self-heating function to reduce energy consumption.
Smart Images
Figure CN223891616U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of etching solution storage devices, specifically a self-insulating acidic etching solution storage device. Background Technology
[0002] In the electronics manufacturing industry, acidic etching solutions are widely used in the processing of precision components such as printed circuit boards (PCBs) and semiconductors. However, the chemical activity of acidic etching solutions is significantly affected by temperature. Large temperature fluctuations during storage can lead to decomposition of the etching solution components, changes in concentration, or the formation of crystal precipitation, thereby reducing etching efficiency or even damaging equipment. Existing technologies for storing acidic etching solutions often face the following problems:
[0003] 1. Traditional storage devices mostly rely on static containers and lack dynamic mixing mechanisms. Prolonged static etchant can lead to component stratification or solid particle precipitation, affecting the stability of subsequent processes. In addition, storage devices often use electric heating devices to heat directly from the bottom. Static solutions are prone to localized overheating, which accelerates the decomposition of the etchant and results in high energy consumption.
[0004] 2. When traditional storage devices keep etching solutions warm, the volatile gas components that evaporate from the acidic etching solution when heated are prone to escape during storage. These volatile gas components will increase the gas pressure inside the storage device. The sealing design of existing equipment is mostly limited to physical sealing, which makes it difficult to achieve dynamic gas pressure balance and gas recovery. The direct emission of volatile gases pollutes the environment, changes the solution concentration ratio, affects the process accuracy, and the volatile gases also contain high heat. Direct emission leads to serious heat loss and increased energy consumption.
[0005] To address these issues, we provide a self-insulating storage device for acidic etching solution. Utility Model Content
[0006] The purpose of this invention is to provide a self-insulating storage device for acidic etching solution to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A self-insulating acidic etching solution storage device includes a frame, a storage tank with a top opening on the frame, a cover plate hinged to the top opening of the storage tank, a water bath at the bottom of the storage tank, an electric heating element for heating the bottom wall of the storage tank, a main shaft rotatably mounted on the storage tank, a stirring rod rotatably mounted inside the storage tank at one end of the main shaft, a stirring paddle mounted on the stirring rod, a cylinder on the storage tank, a piston slidably engaged inside the cylinder, a first hose and a second hose communicating with the inside of the storage tank on the cylinder, and a heat exchange tube fixedly mounted on the second hose through the water bath and located inside the water bath.
[0009] The piston and the main shaft are connected by a linkage mechanism. When the main shaft rotates, it drives the piston to slide back and forth inside the cylinder.
[0010] A storage device for a self-insulating acidic etching solution as described above: the water bath is provided with an inlet pipe for liquid inlet, the bottom of the water bath is provided with a drain pipe for liquid outlet, and a valve is installed on the drain pipe.
[0011] A self-insulating acidic etching solution storage device as described above: a motor is installed on the frame, and the output end of the motor is connected to the main shaft through a coupling to drive the main shaft to rotate.
[0012] As described above, a storage device for a self-insulating acidic etching solution includes a first pipe interface and a second pipe interface fixedly installed on the cover plate, which communicate with the inside of the storage tank. The first flexible tube is movably inserted into the second pipe interface, and the second flexible tube is movably inserted into the first pipe interface.
[0013] A self-insulating acid etching solution storage device as described above: one-way valves are installed on the first hose and the second hose respectively, so that gas and liquid can only enter the cylinder through the first hose in one direction and gas and liquid can only enter the second hose from the cylinder in one direction.
[0014] A storage device for a self-insulating acidic etching solution as described above: the linkage mechanism includes a secondary shaft rotatably mounted on a frame, the secondary shaft and the main shaft are connected by a first transmission mechanism, the main shaft rotates while driving the secondary shaft to rotate, a rotating wheel is provided at one end of the secondary shaft, a swing arm is hinged on the rotating wheel, a piston rod is movably inserted into the cylinder body at one end of the swing arm, and one end of the piston rod is fixed to a piston.
[0015] A storage device for a self-insulating acidic etching solution as described above: the first transmission mechanism includes a worm fixed on the main shaft and a worm wheel fixed on the secondary shaft, wherein the worm meshes with the worm wheel.
[0016] Compared with the prior art, the beneficial effects of this utility model are:
[0017] The storage tank is equipped with a rotating main shaft, with a stirring rod mounted on the inside of the storage tank at one end. The stirring rod is equipped with a stirring paddle. When the stirring paddle rotates, it stirs the acidic etching solution inside the storage tank while it is being heated. This prevents the etching solution from separating during storage and reduces the amount of sediment adhering to the inner wall of the container. At the same time, when the bottom of the storage tank is heated by an electric heating element, the stirring accelerates the flow of the acidic etching solution, making the heating more uniform and avoiding the decomposition of the acidic etching solution caused by local heating, while also reducing energy consumption.
[0018] Additionally, this utility model's storage box is equipped with a cylindrical body, inside which a piston is slidably engaged. The cylindrical body is fitted with a first flexible hose and a second flexible hose, both communicating with the interior of the storage box. The second flexible hose passes through a water bath. As the main shaft rotates, it drives the piston to reciprocate within the cylindrical body. This reciprocating motion of the piston, in conjunction with the first and second flexible hoses, continuously draws volatile gases generated by the evaporation of the acidic etching solution during the heat preservation process inside the storage box from the first flexible hose into the cylindrical body, and then pushes them back into the second flexible hose. The high-temperature volatile gases exchange heat with the water inside the water bath, causing them to liquefy and re-enter the cover plate, thus... The gases volatilized from the inside of the storage tank are recovered, liquefied, and then transported back into the tank. This reduces the escape of volatile substances, prevents changes in solution concentration, and improves the storage quality of the acidic etching solution. Furthermore, it helps maintain a dynamic pressure balance inside the storage tank, preventing excessive volatile gases from increasing internal pressure and accelerating the decomposition of the acidic etching solution components. Additionally, the high-temperature volatile gases exchange heat with the water inside the water bath as they flow through, further recovering heat. The water bath itself provides insulation, giving the storage tank a self-insulating function and allowing for the recycling of recovered heat, thus reducing energy consumption. Attached Figure Description
[0019] Figure 1 A first-view overall structural schematic diagram of a storage device for a self-insulating acidic etching solution.
[0020] Figure 2 A second-view overall schematic diagram of the structure of a storage device for a self-insulating acidic etching solution.
[0021] Figure 3 A storage device for a self-heating acidic etching solution Figure 2 A schematic diagram of the decomposed local structure.
[0022] Figure 4 A storage device for a self-heating acidic etching solution Figure 3A schematic diagram of the structure after the cover plate is flipped open.
[0023] Figure 5 This is a schematic diagram of the overall structure of a storage device for a self-insulating acidic etching solution, showing a partial cross-section of the bottom of the water bath.
[0024] Figure 6 A storage device for a self-heating acidic etching solution Figure 2 A schematic diagram of the decomposed local structure.
[0025] Figure 7 A storage device for a self-heating acidic etching solution Figure 6 A schematic diagram of the decomposed local structure.
[0026] In the diagram: 1. Frame; 2. Storage tank; 3. Cover plate; 4. Water bath; 5. Main shaft; 6. Stirring rod; 7. Stirring paddle; 8. Motor; 9. First pipe interface; 10. Second pipe interface; 11. Cylinder; 12. Piston rod; 13. Piston; 14. Rotary wheel; 15. Swing arm; 16. Sub-shaft; 17. Worm gear; 18. Worm wheel; 19. First flexible hose; 20. Second flexible hose; 21. Heat exchange tube; 22. Electric heating element; 23. Water inlet pipe; 24. Drain pipe. Detailed Implementation
[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0028] Please see Figures 1 to 7 As an embodiment of the present invention, a storage device for a self-insulating acidic etching solution includes a frame 1, a storage tank 2 with a top opening on the frame 1, a cover plate 3 hinged to the top opening of the storage tank 2, a water bath 4 at the bottom of the storage tank 2, an electric heating element 22 for heating the bottom wall of the storage tank 2, a main shaft 5 rotatably mounted on the storage tank 2, a stirring rod 6 rotatably mounted on one end of the main shaft 5 inside the storage tank 2, a stirring paddle 7 mounted on the stirring rod 6, a cylinder 11 mounted on the storage tank 2, a piston 13 slidably engaged inside the cylinder 11, a first hose 19 and a second hose 20 communicating with the inside of the storage tank 2 on the cylinder 11, and a heat exchange tube 21 fixedly mounted on the passage of the second hose 20 through the water bath 4 inside the water bath 4.
[0029] The piston 13 is connected to the main shaft 5 through a linkage mechanism. When the main shaft 5 rotates, it will drive the piston 13 to slide back and forth inside the cylinder 11.
[0030] In this embodiment, a main shaft 5 is rotatably mounted on the storage tank 2. A stirring rod 6 is rotatably mounted on one end of the main shaft 5 inside the storage tank 2. A stirring paddle 7 is mounted on the stirring rod 6. When the stirring paddle 7 rotates, it stirs the acidic etching solution inside the storage tank 2 during heating, thereby preventing the etching solution from separating during storage. In addition, a cylinder 11 is mounted on the storage tank 2. A piston 13 is slidably engaged inside the cylinder 11. A first hose 19 and a second hose 20 are mounted on the cylinder 11 and communicate with the inside of the storage tank 2. The second hose 20 passes through the water bath 4. When the main shaft 5 rotates, it drives the piston 13 to slide back and forth inside the cylinder 11. The reciprocating sliding of the piston 13 inside the cylinder 11, in conjunction with the first hose 19 and the second hose 20, continuously draws the volatile gases generated by the heating and evaporation of the acidic etching solution during the heat preservation storage process inside the storage tank 2 from the first hose 19 into the cylinder 11, and then pushes them back into the second hose 20 through the cylinder 11.
[0031] When the hot volatile gases flow through the water bath 4, they exchange heat with the water inside, causing the volatile gases to liquefy and re-enter the cover plate 3. By recovering and liquefying the gases evaporating from the inside of the storage tank 2 before transporting them back into the storage tank 2, the escape of volatile substances is reduced, changes in the solution concentration ratio are avoided, and the storage quality of the acid etching solution is improved. In addition, it is beneficial to maintain a dynamic balance of gas pressure inside the storage tank 2, preventing excessive volatile gases from increasing the internal pressure of the storage tank 2 and accelerating the decomposition of the acid etching solution components. Furthermore, the heat exchange between the hot volatile gases and the water inside the water bath 4 further recovers heat, and the water bath 4 can be used to keep the storage tank 2 warm, giving the storage tank 2 a self-insulating function, allowing the recovered heat to be recycled and reducing energy consumption.
[0032] As a further embodiment of this utility model, the water bath 4 is provided with an inlet pipe 23 for liquid inlet, and the bottom of the water bath 4 is provided with a drain pipe 24 for liquid outlet, and a valve is installed on the drain pipe 24.
[0033] In this embodiment, the water inlet pipe 23 is connected to an external water source through a pipeline. Water can be added into the water bath 4 through the water inlet pipe 23. At the same time, when the acid etching solution is no longer stored after storage, the valve on the drain pipe 24 can be opened to discharge the water inside the water bath 4.
[0034] As a further embodiment of this utility model, a motor 8 is provided on the frame 1, and the output end of the motor 8 is connected to the main shaft 5 through a coupling to drive the main shaft 5 to rotate.
[0035] In this embodiment, the motor 8 is electrically connected to an external power source via a wire. Starting the motor 8 can drive the main shaft 5 to rotate. The rotation of the main shaft 5 will drive the stirring rod 6 and the stirring paddle 7 to rotate, thereby stirring the acidic etching solution inside the storage tank 2 through the stirring paddle 7.
[0036] As a further embodiment of this utility model, a first pipe interface 9 and a second pipe interface 10 communicating with the inside of the storage box 2 are fixedly installed on the cover plate 3. The first flexible hose 19 is movably inserted into the second pipe interface 10, and the second flexible hose 20 is movably inserted into the first pipe interface 9.
[0037] In this embodiment, the first hose 19 can be movably inserted into the second pipe interface 10 to connect the first hose 19 to the inside of the storage box 2, and the second hose 20 can be movably inserted into the first pipe interface 9 to connect the second hose 20 to the inside of the storage box 2.
[0038] As a further embodiment of this utility model, one-way valves are installed on the first hose 19 and the second hose 20 respectively, so that gas and liquid can only enter the cylinder 11 through the first hose 19 in one direction and gas and liquid can only enter the second hose 20 from the cylinder 11 in one direction.
[0039] In this embodiment, when the piston 13 slides outward inside the cylinder 11, the negative pressure energy draws the gas inside the storage tank 2 into the cylinder 11. At the same time, when the piston 13 slides inward inside the cylinder 11, it can push the gas drawn in inside the cylinder 11 back into the second hose 20.
[0040] As a further embodiment of this utility model, the linkage mechanism includes a secondary shaft 16 rotatably mounted on the frame 1. The secondary shaft 16 and the main shaft 5 are connected by a first transmission mechanism. When the main shaft 5 rotates, it will drive the secondary shaft 16 to rotate. One end of the secondary shaft 16 is provided with a rotating wheel 14. A swing arm 15 is hinged on the rotating wheel 14. One end of the swing arm 15 is hinged to a piston rod 12 that is movably inserted into the cylinder 11. One end of the piston rod 12 is fixed to the piston 13.
[0041] In this embodiment, the rotation of the main shaft 5 will drive the secondary shaft 16 to rotate. When the secondary shaft 16 rotates, it will drive the rotating wheel 14 to rotate. When the rotating wheel 14 rotates, it will drive the swing arm 15 to swing, thereby driving the piston 13 at one end of the piston rod 12 to reciprocate inside the cylinder 11.
[0042] As a further embodiment of this utility model, the first transmission mechanism includes a worm 17 fixed on the main shaft 5 and a worm wheel 18 fixed on the secondary shaft 16, with the worm 17 meshing with the worm wheel 18.
[0043] In this embodiment, when the main shaft 5 rotates, it drives the worm 17 to rotate. The worm 17 meshes with the worm wheel 18, which in turn drives the worm wheel 18 to rotate, thereby driving the secondary shaft 16 to rotate.
[0044] It should be noted that a temperature sensor is fixedly installed on the inner wall of the storage box 2. The temperature sensor is connected to the electric heating element 22 via a wire. The temperature sensor can detect the internal temperature of the storage box 2 in real time and transmit the detection signal to the electric heating element 22 to control the electric heating element 22 to start and stop automatically to maintain the dynamic balance of the internal temperature of the storage box 2, so that the acid etching solution can be stored within a suitable temperature range.
[0045] In use, the acidic etching solution is first added into the storage tank 2. After the addition is completed, the cover plate 3 is rotated and placed on the top opening of the storage tank 2 to seal the inside of the storage tank 2. The electric heating element 22 is then activated to heat the bottom of the storage tank 2, so that the internal temperature of the storage tank 2 is heated to the appropriate storage temperature range for the acidic etching solution. During storage, the motor 8 is activated to drive the main shaft 5 to rotate. The rotation of the main shaft 5 will drive the stirring rod 6 and the stirring paddle 7 to rotate. The stirring paddle 7 can stir the acidic etching solution inside the storage tank 2, thereby preventing the etching solution from separating during storage. In addition, during the heating process of the electric heating element 22, the stirring accelerates the flow of the acidic etching solution, thereby making it more evenly heated, avoiding the decomposition of the acidic etching solution caused by local heating, and reducing energy consumption.
[0046] Additionally, a cylinder 11 is provided on the storage tank 2, and a piston 13 is slidably engaged inside the cylinder 11. A first hose 19 and a second hose 20, which communicate with the inside of the storage tank 2, are provided on the cylinder 11. The second hose 20 passes through the water bath 4. When the main shaft 5 rotates, it drives the piston 13 to slide back and forth inside the cylinder 11. Through the reciprocating sliding of the piston 13 inside the cylinder 11, in conjunction with the first hose 19 and the second hose 20, the volatile gases generated by the evaporation of the acid etching solution during the heat preservation storage process inside the storage tank 2 can be continuously drawn from the first hose 19 into the inside of the cylinder 11, and then pushed back into the second hose 20 through the cylinder 11.
[0047] The high-temperature volatile gases will exchange heat with the water inside the water bath 4 as they flow through the heat exchange tube 21, thereby liquefying the volatile gases and allowing them to re-enter the cover plate 3. By recovering and liquefying the gases volatilized inside the storage tank 2 before transporting them back into the storage tank 2, the escape of volatile substances is reduced, changes in the solution concentration ratio are avoided, and the storage quality of the acid etching solution is improved. In addition, it is beneficial to maintain a dynamic balance of gas pressure inside the storage tank 2, preventing the increased internal pressure caused by excessive volatile gases from accelerating the decomposition of the acid etching solution components. Furthermore, the heat exchange between the high-temperature volatile gases and the water inside the water bath 4 further recovers heat, and the water bath 4 can be used to keep the storage tank 2 warm, giving the storage tank 2 a self-insulating function, allowing the recovered heat to be recycled and reducing energy consumption.
[0048] The above embodiments are exemplary and not restrictive. Therefore, without departing from the spirit or basic characteristics of this utility model, any technical solutions that can be implemented in other specific forms are included in this utility model.
Claims
1. A storage device for a self-insulating acidic etching solution, comprising a rack (1), characterized in that, The frame (1) is provided with a storage box (2) with a top opening. A cover plate (3) is hinged to the top opening of the storage box (2). A water bath (4) is provided at the bottom of the storage box (2). An electric heating element (22) for heating the storage box (2) is provided on the bottom wall of the storage box (2). A main shaft (5) is rotatably provided on the storage box (2). A stirring rod (6) is rotatably installed inside the storage box (2) at one end of the main shaft (5). A stirring paddle (7) is provided on the stirring rod (6). A cylinder (11) is provided on the storage box (2). A piston (13) is slidably engaged inside the cylinder (11). A first hose (19) and a second hose (20) communicating with the inside of the storage box (2) are provided on the cylinder (11). A heat exchange tube (21) is fixedly installed on the passage of the second hose (20) through the water bath (4) and located inside the water bath (4). The piston (13) and the main shaft (5) are connected by a linkage mechanism. When the main shaft (5) rotates, it will drive the piston (13) to slide back and forth in the cylinder (11).
2. The storage device for a self-heating acidic etching solution according to claim 1, characterized in that, The water bath (4) is provided with an inlet pipe (23) for liquid inlet, and the bottom of the water bath (4) is provided with a drain pipe (24) for liquid outlet, and a valve is installed on the drain pipe (24).
3. The storage device for a self-heating acidic etching solution according to claim 1, characterized in that, The frame (1) is equipped with a motor (8), and the output end of the motor (8) is connected to the main shaft (5) through a coupling to drive the main shaft (5) to rotate.
4. The storage device for a self-heating acidic etching solution according to claim 1, characterized in that, The cover plate (3) is fixedly installed with a first pipe interface (9) and a second pipe interface (10) that communicate with the inside of the storage box (2). The first hose (19) is movably inserted into the second pipe interface (10), and the second hose (20) is movably inserted into the first pipe interface (9).
5. A storage device for a self-heating acidic etching solution according to claim 1, characterized in that, One-way valves are installed on the first hose (19) and the second hose (20), respectively, so that gas and liquid can only enter the cylinder (11) through the first hose (19) in one direction and gas and liquid can only enter the second hose (20) from the cylinder (11) in one direction.
6. A storage device for a self-heating acidic etching solution according to claim 1, characterized in that, The linkage mechanism includes a secondary shaft (16) rotatably mounted on the frame (1). The secondary shaft (16) and the main shaft (5) are connected by a first transmission mechanism. When the main shaft (5) rotates, it will drive the secondary shaft (16) to rotate. One end of the secondary shaft (16) is provided with a rotating wheel (14). A swing arm (15) is hinged on the rotating wheel (14). One end of the swing arm (15) is hinged with a piston rod (12) that is movably inserted into the cylinder (11). One end of the piston rod (12) is fixed to the piston (13).
7. A storage device for a self-heating acidic etching solution according to claim 6, characterized in that, The first transmission mechanism includes a worm (17) fixed on the main shaft (5) and a worm wheel (18) fixed on the secondary shaft (16), wherein the worm (17) meshes with the worm wheel (18).