Pickling equipment for hot dip galvanizing

Abstract

The utility model discloses pickling equipment for hot dip galvanizing, and belongs to the technical field of pickling equipment. The pickling equipment for hot dip galvanizing comprises a pickling channel, an inlet and an outlet are formed in the two ends of the pickling channel, a rail crane from the inlet to the outlet is arranged in the pickling channel, and the end, close to the inlet, of the rail crane is located outside the inlet. A first air curtain machine, a pickling tank and a second air curtain machine are sequentially arranged below the rail crane from the inlet to the outlet; the acid pickling device has the advantages that batch hoisting of workpieces for acid pickling is facilitated, and the acid pickling efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of pickling equipment technology, and in particular to pickling equipment for hot-dip zinc. Background Technology

[0002] Pickling equipment typically uses hydrochloric acid to pickle steel parts. However, hydrochloric acid will release hydrogen chloride gas, which is a harmful gas that can seriously endanger the health of workers and pollute the surrounding environment.

[0003] Utility model patent CN219568068U discloses a pickling device for hot-dip galvanized steel parts, comprising a circular outer shell and a square outer shell. A sealing drive shell is fixedly connected to the bottom of the inner wall of the circular outer shell, and a fixed outer barrel is fixedly connected to the upper end of the sealing drive shell. A filter ring support mesh is fixedly connected between the side end of the fixed outer barrel and the inner side wall of the circular outer shell. A gas filter ring is provided at the upper end of the filter ring support mesh, and an exhaust fan is provided at the lower end of the filter ring support mesh. The side end of the exhaust fan is fixedly installed on the side end of the fixed outer barrel, and an outer barrel check valve is fixedly installed on the lower side end of the fixed outer barrel. The gas filter ring prevents hydrogen chloride gas from being released after the chamber cover is opened. In addition, the addition of an additive box allows the device to perform internal neutralization after pickling before discharge, thereby mitigating secondary pollution and protecting the surrounding environment.

[0004] In actual production, in order to ensure hot dipping efficiency and reduce production costs, it is generally necessary to use cranes to lift a large number of workpieces for pickling operations. The structure of the outer barrel that uses a round box cover to close and fix the outer barrel in the above solution is not conducive to lifting workpieces in batches and affects production efficiency. Utility Model Content

[0005] The purpose of this invention is to solve the problem that existing pickling equipment is not conducive to the hoisting of batch workpieces for pickling operations, and to propose a pickling equipment for hot-dip galvanizing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Pickling equipment for hot-dip galvanizing includes a pickling channel with an inlet and an outlet at both ends. A rail-mounted crane is installed inside the pickling channel, running from the inlet to the outlet. The end of the rail-mounted crane near the inlet is located outside the inlet. Below the rail-mounted crane, from the inlet to the outlet, a first air curtain machine, a pickling tank, and a second air curtain machine are sequentially arranged.

[0008] Furthermore, the airflow from both the first and second air curtain machines is directed towards the pickling tank.

[0009] Furthermore, a rinsing tank is provided on the side of the second air curtain machine near the outlet direction, and the airflow of both the first and second air curtain machines is directed towards the outlet direction.

[0010] Furthermore, frame-type sprayers are installed on both sides of the rinsing tank.

[0011] Furthermore, the frame-type sprayer includes a frame-type water pipe and water mist nozzles. The frame-type water pipe passes over the rinsing tank, and water mist nozzles are evenly arranged on the inner side of the frame-type water pipe, with all water mist nozzles facing the center of the rinsing tank.

[0012] Furthermore, a drying device is provided on the side of the rinsing tank near the outlet.

[0013] Furthermore, the air drying device includes multiple frame-type air ducts spaced apart along the track direction of the rail crane, and airflow nozzles are evenly arranged on the inner side of the frame-type air ducts, with all airflow nozzles facing the center of the rinsing tank.

[0014] Compared with the prior art, the present invention provides a pickling device for hot-dip zinc, which has the following advantages:

[0015] This utility model relates to a pickling equipment for hot-dip galvanizing. During operation, a rail-mounted crane lifts workpieces in batches, allowing them to enter the pickling channel through the inlet and be placed into the pickling tank for pickling. A first air curtain from the inlet side of the pickling tank prevents hydrogen sulfide gas from escaping, and a second air curtain from the outlet side of the pickling tank also prevents hydrogen sulfide gas from escaping. Compared to existing technologies, this equipment not only prevents hydrogen sulfide gas from harming workers' health and polluting the environment, but also allows for batch lifting of workpieces using a rail-mounted crane, improving pickling production efficiency.

[0016] Other advantages, objectives and features of this invention will be set forth in part in the description which follows; and in part will be apparent to those skilled in the art upon examination of the following description; or may be taught from practice of this invention. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the pickling channel of this utility model;

[0019] Figure 3 This is a schematic diagram of the frame-type sprayer structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the air-drying device of this utility model.

[0021] In the figure:

[0022] 1. Pickling channel; 2. Rail crane; 3. Observation window; 4. Next process position; 5. First air curtain machine; 6. Pickling tank; 7. Second air curtain machine; 8. Frame type sprayer; 801. Frame type water pipe; 802. Water mist nozzle; 9. Rinsing tank; 10. Air drying device; 101. Frame type air duct; 102. Air flow nozzle. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0024] Refer to Figure 1-2 , the pickling equipment of the present utility model for hot dip galvanizing includes a pickling channel 1. The pickling channel 1 is a square workshop channel with both ends open, and its cross-section is in a "冂" shape. The two ends of the pickling channel 1 are respectively an inlet and an outlet. Inside the pickling channel 1, there is a rail crane 2 from the inlet to the outlet, which is used for batch lifting of workpieces for pickling operations. One end of the rail crane 2 close to the inlet is located outside the inlet. Specifically, the track of the rail crane 2 is laid outside the pickling channel 1, facilitating the rail crane 2 to lift workpieces from outside the pickling channel 1, avoiding staff from entering the inside of the pickling channel, and thereby avoiding the harm of hydrogen chloride gas to the health of staff.

[0025] Below the rail crane 2, a first air curtain machine 5, a pickling tank 6, and a second air curtain machine 7 are sequentially arranged from the inlet to the outlet direction. After the rail crane 2 lifts the workpiece, it first passes through the air wall formed by the first air curtain machine 5. After reaching above the pickling tank 6, the workpiece is lowered into the pickling tank 6 for pickling. After pickling is completed, the rail crane 2 lifts the workpiece again and passes through the air wall formed by the second air curtain machine 7.

[0026] Both the first air curtain machine 5 and the second air curtain machine 7 are built by multiple air curtain machines. The multiple air curtain machines are arranged in a "口" - shaped structure and are built on the top wall, both side walls inside the pickling channel 1 and embedded in the ground. The air curtain blown by the multiple air curtain machines together forms an air wall to prevent hydrogen chloride gas from floating out of the pickling channel 1.

[0027] The airflow directions of the first air curtain machine 5 and the second air curtain machine 7 can be selected to both face the pickling tank 6 to prevent hydrogen chloride gas from floating outwards from the pickling channel 1.

[0028] Refer to Figure 1-4The present invention is used for pickling equipment for hot-dip zinc. The difference between this embodiment and embodiment 1 is that a rinsing tank 9 is built on the side of the second air curtain machine 7 near the outlet direction. The pickling liquid adhering to the surface of the workpiece after it comes out of the pickling tank 6 is rinsed off by the rinsing tank 9, which further reduces the dispersion of hydrogen chloride and reduces the time for the pickled workpiece to wait for drying.

[0029] In this situation, the airflow of the first air curtain machine 5 and the second air curtain machine 7 are both directed towards the outlet. The function of the first air curtain machine 5 is to prevent hydrogen chloride gas from drifting outward, while the function of the second air curtain machine 7 is mainly to prevent the water vapor evaporated in the rinsing tank 9 from entering the pickling tank 6 and affecting the pickling effect of the pickling tank 6.

[0030] The rinsing tank 9 is equipped with frame-type sprayers 8 on both sides. The frame-type sprayers 8 spray high-speed water jets to rinse the pickling solution on the surface of the workpiece, thereby improving the rinsing efficiency.

[0031] The frame-type sprayer 8 includes a frame-type water pipe 801 and water mist nozzles 802. The frame-type water pipe 801 passes over the rinsing tank 9. Water mist nozzles 802 are evenly installed on the inner side wall of the frame-type water pipe 801. All water mist nozzles 802 face the center of the rinsing tank 9. The frame-type water pipe 801 is U-shaped and is connected to an external water source for water supply. When the water mist nozzles 802 spray towards the center of the rinsing tank 9, a water wall can be formed. The function of the water wall is to prevent the hydrogen chloride gas blown into the rinsing tank 9 by the second air curtain machine 7 from continuing to flow to the outlet. The hydrogen chloride gas is absorbed by utilizing the property that hydrogen chloride is highly soluble in water.

[0032] A drying device 10 is installed on the side of the rinsing tank 9 near the outlet to dry the rinsed workpieces, thereby increasing the drying speed of the workpieces and saving intermediate time for the next hot-dip galvanizing operation.

[0033] The air drying device 10 includes multiple frame-type air ducts 101 spaced apart along the track direction of the rail crane 2. Airflow nozzles 102 are evenly installed on the inner side wall of the frame-type air ducts 101. The airflow nozzles 102 are all facing the center of the rinsing tank 9. The frame-type air ducts 101 have a U-shaped structure and are connected to an external high-pressure air source. The airflow nozzles 102 on the multiple frame-type air ducts 101 spray high-speed airflow onto the passing workpieces to air dry the aqueous solution adhering to the surface of the workpieces.

[0034] A transparent observation window 3 can be installed on the side wall of pickling channel 1, allowing staff to observe the operation of the equipment inside pickling channel 1.

[0035] Next process station 4 is the next process area after the workpiece is pickled. It can be a zinc bath or other areas, depending on the actual situation.

[0036] Working principle: During use, on the outside of the pickling channel 1, the workpieces are lifted in batches by the rail crane 2. Then, the rail crane 2 is controlled to lift the workpieces from the inlet through the air wall formed by the first air curtain machine 5 and enter the pickling channel 1. When it reaches the top of the pickling tank 6, the rail crane 2 lowers the workpieces into the pickling tank 6 for pickling. After pickling is completed, the rail crane 2 lifts the workpieces again and continues to move towards the outlet, passing through the air wall formed by the second air curtain machine 7. After reaching the top of the rinsing tank 9, with the assistance of the water flow sprayed by the frame sprayer 8, the workpieces are lowered into the rinsing tank 9 for rinsing. After rinsing is completed, the rail crane 2 lifts the workpieces again and passes through the air drying device 10 to dry the workpieces. Finally, the workpieces enter the next process station 4 for the next process.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pickling apparatus for hot-dip zinc plating, comprising a pickling channel (1), characterized in that, The pickling channel (1) has an inlet and an outlet at both ends. The pickling channel (1) is equipped with a rail crane (2) from the inlet to the outlet. The end of the rail crane (2) near the inlet is located outside the inlet. The first air curtain machine (5), the pickling tank (6), and the second air curtain machine (7) are arranged sequentially from the inlet to the outlet below the rail crane (2).

2. The pickling equipment for hot-dip galvanizing according to claim 1, characterized in that, The airflow from the first air curtain machine (5) and the second air curtain machine (7) is directed toward the pickling tank (6).

3. The pickling equipment for hot-dip galvanizing according to claim 1, characterized in that, The second air curtain machine (7) is provided with a rinsing tank (9) on the side near the outlet direction, and the airflow of the first air curtain machine (5) and the second air curtain machine (7) are both directed towards the outlet direction.

4. The pickling equipment for hot-dip zinc plating according to claim 3, characterized in that, The rinsing tank (9) is equipped with frame-type sprayers (8) on both sides.

5. The pickling equipment for hot-dip zinc plating according to claim 4, characterized in that, The frame-type sprayer (8) includes a frame-type water pipe (801) and a water mist nozzle (802). The frame-type water pipe (801) passes over the top of the rinsing tank (9). Water mist nozzles (802) are evenly arranged on the inner side of the frame-type water pipe (801). All water mist nozzles (802) face the middle position of the rinsing tank (9).

6. The pickling equipment for hot-dip galvanizing according to claim 3, characterized in that, The rinsing tank (9) is equipped with a drying device (10) on the side near the outlet.

7. The pickling equipment for hot-dip galvanizing according to claim 6, characterized in that, The air drying device (10) includes multiple frame-type air ducts (101) spaced apart along the track direction of the rail crane (2). Airflow nozzles (102) are evenly arranged on the inner side of the frame-type air ducts (101), and the airflow nozzles (102) are all facing the middle position of the rinsing tank (9).

Images