Cooling device after zinc-aluminum-magnesium plating

Abstract

The utility model relates to a cooling device after zinc-aluminum-magnesium plating, which comprises two air boxes which are oppositely arranged, and strip steel passes through the space between the two air boxes during cooling; each air box comprises two vertical box bodies and a plurality of horizontal air outlet tubular coolers, a communicating pipeline is arranged between the two vertical box bodies, and the communicating pipeline is connected with the air inlet pipeline; the two ends of each tubular cooler are respectively connected with a vertical box body, and the tubular coolers are parallel to each other and are arranged close to strip steel; the distance between every two adjacent tubular coolers is equal. According to the utility model, the air bellow is designed into the two vertical box bodies and the plurality of horizontal air outlet tubular coolers, so that the turbulence of air flow is avoided, the tubular coolers are parallel to each other and are arranged at fixed intervals, the problem of non-uniform cooling of products caused by the turbulence of the air flow is avoided, and the cooling controllability and uniformity of the products are improved; according to the device, the aerodynamic principle is considered, and after high-speed cooling air makes contact with strip steel and rebounds, sufficient diffusion space is provided for the strip steel.

Description

Technical Field

[0001] This utility model belongs to the field of cooling air box technology and is applied to the field of metal coating equipment, and specifically relates to a cooling device after zinc, aluminum and magnesium plating. Background Technology

[0002] In the production of zinc-aluminum-magnesium strip steel, after the strip exits the zinc bath, a cooling process is required to control the distribution of the zinc, aluminum, and magnesium phases in the strip layer. The requirements for cooling precision and uniformity are higher than those for hot-dip galvanized products. Currently, post-galvanizing cooling generally adopts a fan-box cooling method, which is semi-sealed and has been used for many years and remains quite common.

[0003] While the original design could cool the strip steel by blowing cooling media, its design flaws resulted in poor uniformity in the cooling process. For example, the previous method used a half-width bellows with nozzles or similar jetting devices directly mounted on it to cool the strip steel. However, because the cooling media used in these jetting devices operated at high speed, it would bounce back into the bellows area after contacting the strip steel. The original equipment, being a single-box design, couldn't diffuse the returning media, causing overall airflow turbulence and resulting in uneven cooling near the strip steel.

[0004] Patent No. CN201510115758.4, Publication No. CN104651599A, entitled "Invention Patent for Spray Box Device for Suppressing Vibration of Strip Steel During Gas Cooling Process," describes a spray box device comprising two opposing air boxes and a flow guide partition. Each air box includes an air box body and multiple protruding nozzles located on one side of the air box body. The recessed area between every two adjacent protruding nozzles on the air box is the air box overflow area. The flow guide partition is installed within the air box overflow area, dividing it into two isolated independent areas. The top and bottom ends of the flow guide partition are respectively sealed to the two protruding nozzles. This invention addresses the problem of uneven cooling medium by incorporating an air box overflow area to discharge excess cooling medium from both sides of the air box. While this device does significantly improve the balance of airflow pressure distribution and solves the problem of airflow turbulence, it cannot solve the problem of uneven cooling medium distribution. Therefore, the zinc-aluminum-magnesium strip steel products still fail to meet quality standards due to uneven cooling. Summary of the Invention

[0005] This utility model provides a cooling device for zinc-aluminum-magnesium plating to solve the technical problems existing in the prior art. By optimizing the design of the wind box structure, the cooling medium is evenly distributed in the working area, thereby ensuring uniform cooling of the strip steel.

[0006] This utility model includes the following technical solution:

[0007] A zinc-aluminum-magnesium plating post-coating cooling device includes two air boxes arranged opposite each other, through which the strip steel passes during cooling; each air box includes two vertical boxes and several horizontally outlet tubular coolers, with a connecting pipe between the two vertical boxes, the connecting pipe being connected to an air inlet pipe; each end of the tubular cooler is connected to a vertical box, the tubular coolers are parallel to each other and arranged close to the strip steel; the spacing between two adjacent tubular coolers is equal.

[0008] Furthermore, the tubular cooler is fixedly mounted perpendicularly to the inner sides of the two vertical housings.

[0009] Furthermore, the tubular cooler is made of a steel pipe with a circular cross-section, and a slit is provided in the middle of the steel pipe facing the strip as a horizontal air outlet to ensure uniform cooling.

[0010] Furthermore, the slit positions and dimensions on each of the tubular coolers are identical.

[0011] Furthermore, the opening length of the slit is less than the length of the steel pipe, and the opening width is 5mm.

[0012] Furthermore, the width of the strip is less than or equal to the length of the slit. For strips with low requirements for cooling precision control, the width can be greater than the length of the slit, but generally not greater than the length of the steel pipe.

[0013] Furthermore, the steel pipe is 5mm thick and 100mm in diameter.

[0014] Furthermore, the spacing between two adjacent tubular coolers is 20mm.

[0015] Furthermore, the air inlet duct is divided into two air outlets, each located in the middle of a connecting duct.

[0016] Furthermore, the connecting pipe is a horizontal pipe, with its two ends respectively located in the middle of the two vertical boxes.

[0017] The advantages and positive effects of this utility model are as follows:

[0018] 1. This utility model avoids airflow turbulence by designing the air box as two vertical chambers and several horizontally outlet tubular coolers. The tubular coolers are parallel to each other and have a fixed spacing to prevent uneven cooling of the product due to airflow disturbance, thus improving the controllability and uniformity of product cooling. The design of this device mainly considers aerodynamic principles. After the high-speed cooling air contacts the strip and rebounds, it has sufficient diffusion space to avoid the accumulation of rebounding air affecting the newly ejected cooling gas, thereby achieving uniform and controllable cooling process.

[0019] 2. This utility model uses one air inlet pipe to cool two connected pipes simultaneously, so as to ensure the overall air volume balance of the two air boxes; it also uses one connected pipe to cool two vertical boxes simultaneously, so as to ensure the air pressure balance of the two vertical boxes. Attached Figure Description

[0020] Figure 1 This is a top view of the overall structure of this utility model;

[0021] Figure 2 yes Figure 1 A schematic diagram of the AA cross-section;

[0022] Figure 3 This is a partially enlarged schematic diagram of the inner side of the bellows;

[0023] In the diagram, 1-strip steel; 2-wind box; 201-vertical box body; 202-tubular cooler; 203-horizontal air outlet; 3-connecting pipe; 4-air inlet pipe. Detailed Implementation

[0024] To further disclose the invention content, features, and effects of this utility model, the following examples are provided in conjunction with the accompanying drawings for detailed description. In the following description of the embodiments, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this patent and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this patent.

[0025] In the following description of the embodiments, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0026] Example: See Appendix Figure 1-3A cooling device for zinc-aluminum-magnesium plating includes two opposing air boxes 2, through which the strip steel passes during cooling. Each air box 2 includes two vertical housings 201 and several horizontally outlet tubular coolers 202. A connecting pipe 3 is provided between the two vertical housings 201, and the connecting pipe 3 is connected to an air inlet pipe 4. The air inlet pipe 4 is divided into two air outlets, each located in the middle of one of the connecting pipes 3. The connecting pipe 3 is a horizontal pipe, with its two ends located in the middle of the two vertical housings 201. Each tubular cooler 202 is connected to a vertical housing 201 at both ends, and the tubular coolers 202 are parallel to each other and located near the strip steel 1. The spacing between two adjacent tubular coolers 202 is equal, with a spacing of 20 mm.

[0027] The tubular cooler 202 is fixedly mounted perpendicularly to the inner sides of the two vertical boxes 201. The tubular cooler 202 is made of steel pipe with a circular cross-section, and a slit is provided in the middle of the steel pipe facing the strip as a horizontal air outlet 203 to ensure uniform cooling. The position and size of the slit on each tubular cooler 202 are the same.

[0028] The opening length of the slit is less than the length of the steel pipe, and the opening width is 5mm. The width of the strip 1 is less than or equal to the length of the slit. For strips with low requirements for cooling precision control, the width can be greater than the length of the slit, but generally not greater than the length of the steel pipe. The steel pipe has a thickness of 5mm and a diameter of 100mm.

[0029] Working Principle: By designing the air box 2 as two vertical boxes 201 and several horizontally outlet tubular coolers 202, airflow turbulence is avoided. The tubular coolers 202 are parallel to each other and have a fixed spacing to prevent uneven cooling of the product due to airflow disturbance, thus improving the controllability and uniformity of product cooling. The design of this device mainly considers aerodynamic principles. After the high-speed cooling air contacts the strip steel 1 and rebounds, it has sufficient diffusion space to avoid the accumulation of rebounding air affecting the newly ejected cooling gas, thereby achieving uniform and controllable cooling process. One air inlet pipe 4 is used to simultaneously supply cooling to two connected pipes 3 to ensure the overall air volume balance of the two air boxes 2; one connected pipe 3 is used to simultaneously supply cooling to two vertical boxes 201 to ensure the air pressure balance of the two vertical boxes 201.

[0030] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other modifications under the guidance of the present invention without departing from the spirit and scope of the claims. These modifications all fall within the protection scope of the present invention.

Claims

1. A cooling device after zinc-aluminum-magnesium plating, characterized in that: The device includes two opposing air boxes, through which the strip steel passes during cooling. Each air box includes two vertical housings and several horizontally outlet tubular coolers. A connecting pipe is provided between the two vertical housings, and the connecting pipe is connected to the air inlet pipe. Each tubular cooler is connected to a vertical housing at both ends, and the tubular coolers are parallel to each other and located close to the strip steel. The spacing between two adjacent tubular coolers is equal.

2. The cooling device after zinc-aluminum-magnesium plating according to claim 1, characterized in that: The tubular cooler is fixedly mounted perpendicularly to the inner sides of the two vertical boxes.

3. The zinc-aluminum-magnesium plating post-cooling device according to claim 2, characterized in that: The tubular cooler is made of a steel pipe with a circular cross-section, and a slit is provided in the middle of the steel pipe facing the strip as a horizontal air outlet.

4. The cooling device after zinc-aluminum-magnesium plating according to claim 3, characterized in that: The slits on each of the tubular coolers are identical in position and size.

5. The cooling device after zinc-aluminum-magnesium plating according to claim 4, characterized in that: The opening length of the slit is less than the length of the steel pipe, and the opening width is 5mm.

6. The cooling device after zinc-aluminum-magnesium plating according to claim 5, characterized in that: The width of the strip is less than or equal to the length of the slit.

7. The cooling device after zinc-aluminum-magnesium plating according to claim 3, characterized in that: The steel pipe is 5mm thick and 100mm in diameter.

8. The cooling device after zinc-aluminum-magnesium plating according to claim 1, characterized in that: The spacing between two adjacent tubular coolers is 20mm.

9. A cooling device for zinc-aluminum-magnesium plating according to any one of claims 1-8, characterized in that: The air inlet duct is divided into two air outlets, each located in the middle of a connecting duct.

10. A cooling device for zinc-aluminum-magnesium plating according to claim 9, characterized in that: The connecting pipe is a horizontal pipe, with its two ends respectively located in the middle of two vertical boxes.

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