A metal plate coating production line acid dosing system

Abstract

The utility model relates to metal surface treatment technical field especially relates to is a kind of metal plate coating production line acid dosing system, including equipment bearing base frame, it is characterized by: the equipment bearing base frame one side is equipped with agitator tank, the other side is equipped with the acid liquid storage tank for storing acid liquid, the height of the agitator tank is greater than the height of the acid liquid storage tank;Emergency spray device is equipped in the agitator tank side, agitator drive motor is equipped in the agitator tank top, metering pump is equipped in the agitator tank side, dosing pipeline is connected in metering pump one end, dosing pipeline one end is connected with acid liquid storage tank, the equipment bearing base frame one side is connected with control box;The application is realized acid dosing whole-process optimization by multi-module cooperation: equipment bearing base frame layout makes agitator tank higher than acid liquid storage tank, utilizes gravity auxiliary delivery, simplifies pipeline, reduces loss and reduces blockage;Annular spray pipe multi-nozzle array all-around coverage, cooperate independent storage water tank, emergency response is fast;Double-layer stainless steel acid liquid storage tank adds insulation interlayer, is corrosion-resistant and stable temperature keeps activity;Infrared temperature sensor linkage control box, initiatively identifies exception and triggers spray and other emergencies;Man-machine interface and emergency stop button give consideration to operation and redundant safety;Straight ladder is equipped with protective cage, and maintenance is convenient and prevents falling.

Description

Technical Field

[0001] This utility model relates to the field of metal surface treatment technology, and in particular to an acid dosing system for a metal sheet coating production line. Background Technology

[0002] In metal sheet coating processes, the precise addition of acids (such as phosphating solutions and passivation solutions) is a crucial step in ensuring coating quality. This involves multiple steps, including acid storage, mixing, quantitative delivery, and safety management, directly impacting production line continuity and product performance. Currently, common acid dosing systems often employ a decentralized layout, with storage tanks, stirring devices, and dosing pumps installed independently. This results in complex piping, large space requirements, and significant challenges in coordinating and controlling different components. Some systems lack dedicated emergency protection devices or have limited emergency spray coverage, making rapid response difficult in emergencies such as acid leaks or accidental contact, posing safety hazards. Acid storage tanks are often single-layered structures, lacking sufficient corrosion resistance and temperature control measures, making them susceptible to aging and decreased dosing accuracy due to long-term acid corrosion or temperature fluctuations. Furthermore, poorly designed equipment maintenance access routes (such as unprotected ladders) increase operational risks for personnel.

[0003] Chinese patent discloses a dosing system for precisely controlling the dosage of acid and alkali (publication number: CN 223445315 U), which includes an acid and alkali storage tank, a high-level dosing tank, a delivery pipe, and a first extraction component. The acid and alkali storage tank is connected to the high-level dosing tank via the delivery pipe, and the first extraction component is connected to the delivery pipe. The bottom of the high-level dosing tank is connected to at least one first dosing pipe for primary pH control dosing point and at least one second dosing pipe for secondary pH control dosing point. The first dosing pipe is connected to a first manual valve and a pneumatic valve. However, this dosing system has problems such as scattered layout, insufficient emergency protection, poor acid storage stability, and low maintenance safety, which makes it difficult to meet the requirements of efficient, safe, and reliable dosing for metal sheet coating production lines. Therefore, an acid dosing system for metal sheet coating production lines is needed. Utility Model Content

[0004] The purpose of this invention is to solve the problems of existing acid dosing systems, such as scattered layout, insufficient emergency protection, poor acid storage stability and low maintenance safety, which make it difficult to meet the needs of metal sheet coating production lines for efficient, safe and reliable dosing. Therefore, this invention proposes an acid dosing system for metal sheet coating production lines.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: The acid dosing system for a metal sheet coating production line of this utility model includes an equipment support frame. Its features include: a stirring tank installed on one side of the equipment support frame, and an acid storage tank for storing acid on the other side; the height of the stirring tank is greater than the height of the acid storage tank; an emergency spray device is provided on one side of the stirring tank; a stirring drive motor is provided on the top of the stirring tank; a metering pump is provided on one side of the stirring tank; one end of the metering pump is connected to a dosing pipeline; one end of the dosing pipeline is connected to the acid storage tank; and a control box is connected to one side of the equipment support frame. The spatial layout is reasonable: the height of the stirring tank is higher than that of the acid storage tank, allowing gravity-assisted acid flow from the storage tank to the stirring tank (in conjunction with the metering pump), reducing power loss and shortening the length of the dosing pipeline, thus reducing the risk of pipeline blockage. High functional integration: The mixing, storage, dosing, emergency protection and control functions are integrated into the same base frame to form a compact system unit, saving production line space and facilitating overall installation and relocation; Strong operational controllability: The mixing, dosing and other processes are centrally managed through the control box, improving the convenience of operation; The emergency spray device is directly arranged next to the mixing tank, which can respond quickly in case of acid leakage or personnel contact with acid, reducing safety risks.

[0006] Preferably, the emergency sprinkler system includes an annular sprinkler pipe with multiple nozzles arranged in a circular array. One end of the annular sprinkler pipe is connected to a water inlet pipe, and the other end is connected to a water storage tank. The annular array design of the nozzles in the annular sprinkler pipe allows for multi-directional spraying of the area surrounding the mixing tank, avoiding blind spots inherent in traditional single-point or linear spraying. This ensures rapid coverage of the target area in the event of acid leakage or personnel contact. The water storage tank has an independent water supply, eliminating reliance on an external water source and ensuring immediate activation of the sprinkler system in emergencies, thus shortening response time and enhancing emergency response capabilities.

[0007] Preferably, an infrared temperature sensor is installed on the side of the equipment support frame facing the mixing tank, and the infrared temperature sensor is associated with the control box. The infrared temperature sensor is model IRTP-300LS, which is a common product on the market and can be purchased directly. The infrared temperature sensor can monitor the surface temperature of the mixing tank non-contactly, promptly detect abnormal temperature rises caused by exothermic acid reaction or equipment failure, and avoid safety hazards caused by overheating of the mixing tank (such as tank deformation, accelerated acid evaporation); the sensor data is transmitted to the control box in real time, and when the temperature exceeds the set threshold, the control box can automatically trigger emergency measures (such as stopping mixing and starting emergency spray cooling) to achieve proactive safety protection.

[0008] Preferably, the acid storage tank comprises an inner tank and an outer tank, both made of stainless steel, with an insulation layer between them. The double-layer stainless steel structure resists long-term acid corrosion, extending the tank's service life; the inner tank directly contacts the acid, while the outer tank provides additional protection, preventing acid leakage and environmental contamination; the insulation layer reduces the impact of external temperature changes on the acid (e.g., low temperatures in winter increase acid viscosity, high temperatures in summer cause acid decomposition), maintaining the stability of the acid's physicochemical properties and ensuring accurate subsequent dosing.

[0009] Preferably, the control box is equipped with a human-machine interface, and an emergency stop button is located at the bottom of the human-machine interface. The human-machine interface can display information such as stirring speed, chemical dosing flow rate, and equipment operating status in real time. Operators can adjust parameters through the interface, improving the transparency and flexibility of system control. The emergency stop button is independent of the conventional control logic and can cut off the system power with one click in case of emergencies (such as accidental activation by personnel or equipment malfunction), preventing the accident from escalating and enhancing the inherent safety of the system.

[0010] Preferably, the equipment's support frame is equipped with a straight ladder near the mixing tank, and a protective cage is installed on one side of the straight ladder. The straight ladder provides operators with a convenient access for movement, facilitating routine inspections, cleaning, or maintenance of the top of the mixing tank (such as the mixing motor and dosing port), reducing maintenance difficulty and time costs. The protective cage surrounding the straight ladder effectively prevents operators from slipping or falling during climbing, complying with industrial equipment safety regulations and ensuring personnel safety.

[0011] The advantages of this utility model are: The acid dosing system for a metal sheet coating production line provided by this utility model achieves full-process optimization from acid storage and precise dosing to safety and emergency response through multi-module collaborative design. Firstly, the rational layout of the equipment's support frame ensures that the mixing tank is higher than the acid storage tank, utilizing gravity-assisted acid transport, simplifying the dosing pipeline structure, reducing power loss, and shortening pipeline length to reduce the risk of blockage. The separate design of the mixing tank and acid storage tank avoids mutual interference between different functional components, improving the stability of system operation. Secondly, the emergency spray device adopts a ring-shaped spray pipe and a multi-nozzle ring array design, which can comprehensively cover the area around the mixing tank, quickly activating in case of acid leakage or personnel contact with acid, effectively reducing safety risks. The independent water supply design of the storage tank ensures that no external water source is needed in emergency situations, further shortening the response time. Thirdly, the double-layer stainless steel structure and insulation jacket design of the acid storage tank enhance corrosion resistance to extend equipment life and maintain stable acid temperature through insulation, preventing temperature fluctuations from affecting dosing accuracy or acid activity. Furthermore, the real-time monitoring by the infrared temperature sensor and the intelligent linkage with the control box can proactively identify abnormal temperature rises in the mixing tank and trigger emergency measures (such as stopping mixing and starting spray cooling), achieving an upgrade from passive protection to active safety. The human-machine interface and emergency stop button of the control box provide intuitive operation control and ensure rapid shutdown capability in case of emergencies through independent safety redundancy. Finally, the combined design of the straight ladder and protective cage facilitates maintenance of the top of the mixing tank by operators while avoiding the risk of falls through physical protection, meeting industrial equipment safety standards. In summary, this system has comprehensive advantages in terms of space utilization, operational efficiency, safety performance, and ease of maintenance, and can meet the high reliability requirements of acid dosing processes in metal sheet coating production lines. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This utility model Figure 1 Enlarged view of I in the middle.

[0015] Figure 3 This is a schematic diagram of the structure of this utility model from another perspective.

[0016] Figure 4This is a schematic diagram of the main structure of this utility model.

[0017] In the diagram: 1. Equipment support frame; 2. Metering pump; 3. Dosing pipeline; 4. Acid storage tank; 5. Water storage tank; 6. Water inlet pipe; 7. Circular spray pipe; 8. Mixing tank; 9. Mixing drive motor; 11. Nozzle; 12. Protective cage; 13. Straight ladder; 14. Control box; 15. Emergency stop button. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Example

[0019] Please see Figures 1-4 As shown, an acid dosing system for a metal sheet coating production line includes an equipment support frame 1. The system is characterized by: a mixing tank 8 mounted on one side of the equipment support frame 1, and an acid storage tank 4 for storing acid on the other side. The height of the mixing tank 8 is greater than the height of the acid storage tank 4. An emergency spray device is provided on one side of the mixing tank 8. A stirring drive motor 9, model ABBM2BAX80M2A, is mounted on the top of the mixing tank 8; this is a commercially available product. A metering pump 2 is located on one side of the mixing tank 8, with one end connected to a dosing pipe 3, which is connected to the acid storage tank 4. A control box 14 is connected to one side of the equipment support frame 1. The spatial layout is reasonable: the height of the mixing tank 8 is higher than that of the acid storage tank 4, allowing gravity-assisted acid flow from the storage tank to the mixing tank 8 (in conjunction with the metering pump 2), reducing power loss and shortening the length of the dosing pipe 3, thus reducing the risk of pipe blockage. High functional integration: The mixing, storage, dosing, emergency protection and control functions are integrated into the same base frame to form a compact system unit, saving production line space and facilitating overall installation and relocation; Strong operational controllability: The mixing, dosing and other processes are centrally managed through the control box 14, improving the convenience of operation; The emergency spray device is directly arranged next to the mixing tank 8, which can respond quickly in case of acid leakage or personnel contact with acid, reducing safety risks.

[0020] In this embodiment, the emergency spraying device includes an annular spray pipe 7, which has multiple nozzles 11 arranged in a circular array. One end of the annular spray pipe 7 is connected to a water inlet pipe 6, and the other end of the water inlet pipe 6 is connected to a water storage tank 5. The annular array design of the nozzles 11 of the annular spray pipe 7 can spray the area around the mixing tank 8 from multiple directions, avoiding blind spots of traditional single-point or linear spraying, and ensuring rapid coverage of the target area in case of acid leakage or personnel contact. The water storage tank 5 has an independent water supply, eliminating the need to rely on an external water source, ensuring that the spraying device can be activated immediately in an emergency, shortening the response time and improving emergency response capabilities.

[0021] In this embodiment, an infrared temperature sensor is installed on the side of the equipment support frame 1 facing the mixing tank 8, and the infrared temperature sensor is associated with the control box 14. The infrared temperature sensor is model IRTP-300LS, which is a common product on the market and can be purchased directly. The infrared temperature sensor can monitor the surface temperature of the mixing tank 8 non-contactly, and promptly detect abnormal temperature rises caused by exothermic acid reaction or equipment failure, avoiding safety hazards caused by overheating of the mixing tank 8 (such as tank deformation, increased acid evaporation); the sensor data is transmitted to the control box 14 in real time, and when the temperature exceeds the set threshold, the control box 14 can automatically trigger emergency measures (such as stopping stirring and starting emergency spray cooling) to achieve active safety protection.

[0022] In this embodiment, the acid storage tank 4 includes an inner tank and an outer tank, both made of stainless steel, with an insulation layer between them. The double-layer stainless steel structure resists long-term acid corrosion, extending the tank's service life. The inner tank directly contacts the acid, while the outer tank provides additional protection, preventing acid leakage and environmental contamination. The insulation layer reduces the impact of external temperature changes on the acid (e.g., low temperatures in winter increase acid viscosity, while high temperatures in summer cause acid decomposition), maintaining the stability of the acid's physicochemical properties and ensuring accurate subsequent dosing.

[0023] In this embodiment, the control box 14 is equipped with a human-machine interface, and an emergency stop button 15 is located at the bottom of the human-machine interface. The human-machine interface can display information such as stirring speed, chemical dosing flow rate, and equipment operating status in real time. Operators can adjust parameters through the interface, improving the transparency and flexibility of system control. The emergency stop button 15 is independent of the conventional control logic and can cut off the system power with one click in case of emergencies (such as accidental touch by personnel or equipment malfunction), preventing the accident from escalating and enhancing the inherent safety of the system.

[0024] In this embodiment, a straight ladder 13 is provided on the side of the equipment support frame 1 near the mixing tank 8, and a protective cage 12 is provided on one side of the straight ladder 13. The straight ladder 13 provides operators with a convenient access for going up and down, facilitating daily inspection, cleaning, or maintenance of the top of the mixing tank 8 (such as the stirring motor and the dosing port), reducing maintenance difficulty and time costs; the protective cage 12 is arranged around the straight ladder 13, which can effectively prevent operators from accidentally slipping or falling during the climbing process, complying with industrial equipment safety regulations and ensuring the safety of personnel.

[0025] The implementation principle of this embodiment is as follows: The operator pours the acid solution to be used into the acid storage tank 4. Because the acid storage tank 4 adopts a double-layer structure with both the inner and outer tanks made of stainless steel, and an insulation layer is installed between the two tanks, this structure can effectively resist long-term chemical corrosion of the acid solution, prevent tank damage and leakage, and also isolate the acid solution stored in the tank from changes in external ambient temperature through the insulation layer, ensuring that the acid solution is always maintained within a suitable temperature range, thereby maintaining the physicochemical activity of the acid solution and providing a stable raw material basis for subsequent chemical dosing.

[0026] The operator inputs the parameters required for this dosing (such as dosage, stirring time, etc.) through the human-machine interface on the control box 14 and confirms that the system is in normal condition. At this time, the control box 14, as the brain of the entire system, has established a data connection with the infrared temperature sensor and is ready to receive temperature signals.

[0027] The control box 14 starts the metering pump 2, which then draws acid from the acid storage tank 4 through the dosing pipe 3 and delivers it to the elevated mixing tank 8. Because the height of the mixing tank 8 is greater than that of the acid storage tank 4, gravity assists the flow of acid while the metering pump 2 is working, making the dosing process smoother and more energy-efficient.

[0028] When the acid solution enters the mixing tank 8, the control box 14 starts the stirring drive motor 9 installed on the top of the mixing tank 8. The drive motor drives the stirring device to rotate, and fully stirs and mixes the acid solution in the tank to achieve the uniform concentration required by the process.

[0029] During the mixing process, the infrared temperature sensor on the side of the equipment support frame 1 facing the mixing tank 8 continuously performs non-contact scanning of the surface temperature of the mixing tank 8 and transmits the collected temperature data to the control box 14 in real time. If the temperature rises abnormally due to the exothermic chemical reaction during the mixing process and exceeds the safety threshold, the control box 14 will immediately issue a command to automatically activate the emergency spray device.

[0030] Once the control box 14 triggers the emergency procedure, the emergency sprinkler system starts working. The water inlet pipe 6, connected to the storage water tank 5, supplies water to the annular sprinkler pipe 7. The water flows out through multiple nozzles 11 arranged in a ring array, forming an all-round water curtain to quickly cool or rinse the mixing tank 8 and prevent safety accidents caused by high temperature.

[0031] In addition, if any uncontrollable emergency occurs during the entire operation, the operator can immediately press the emergency stop button 15 at the bottom of the human-machine interface of the control box 14 to forcibly cut off the system power supply, so that all equipment (including metering pump 2, stirring drive motor 9, etc.) will stop running immediately, maximizing the safety of personnel and equipment.

[0032] When the system requires regular maintenance or repair, operators can safely climb to higher levels of the equipment using the straight ladder 13 located on the side of the equipment support frame 1 near the mixing tank 8. Simultaneously, a protective cage 12 on one side of the straight ladder 13 provides physical protection for the operators, preventing falls during climbing or operation and ensuring the safety of maintenance work.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. An acid dosing system for a metal sheet coating production line, comprising an equipment support frame (1), characterized in that: A stirring tank (8) is installed on one side of the equipment support frame (1), and an acid storage tank (4) for storing acid is provided on the other side. The height of the stirring tank (8) is greater than the height of the acid storage tank (4). An emergency spray device is provided on one side of the stirring tank (8), and a stirring drive motor (9) is provided on the top of the stirring tank (8). A metering pump (2) is provided on one side of the stirring tank (8). One end of the metering pump (2) is connected to a dosing pipe (3), and one end of the dosing pipe (3) is connected to the acid storage tank (4). A control box (14) is connected to one side of the equipment support frame (1).

2. The acid dosing system for a metal sheet coating production line according to claim 1, characterized in that: The emergency sprinkler device includes an annular sprinkler pipe (7), which is provided with multiple nozzles (11) arranged in a ring array. One end of the annular sprinkler pipe (7) is connected to a water inlet pipe (6), and the other end of the water inlet pipe (6) is connected to a water storage tank (5).

3. The acid dosing system for a metal sheet coating production line according to claim 2, characterized in that: An infrared temperature sensor is provided on the side of the equipment support frame (1) facing the mixing tank (8), and the infrared temperature sensor is associated with the control box (14).

4. The acid dosing system for a metal sheet coating production line according to claim 1, characterized in that: The acid storage tank (4) includes an inner tank and an outer tank, both of which are made of stainless steel, and an insulation interlayer is provided between the inner tank and the outer tank.

5. The acid dosing system for a metal sheet coating production line according to claim 1, characterized in that: The control box (14) is equipped with a human-machine interface, and an emergency stop button (15) is provided at the bottom of the human-machine interface.

6. The acid dosing system for a metal sheet coating production line according to claim 1, characterized in that: The equipment support frame (1) is provided with a straight ladder (13) on the side near the mixing tank (8), and a protective cage (12) is provided on one side of the straight ladder (13).

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