Strip steel edge blowing and air-drying device for coating production line

Abstract

A coating production line strip steel edge blowing and air drying device comprises a ventilation pipeline and an air blowing nozzle which are both installed on corresponding supporting frames, one end of the ventilation pipeline is communicated with the air blowing nozzle, the other end of the ventilation pipeline is externally connected to a corresponding air supply device, and the air supply device provides compressed air for the air blowing nozzle through the ventilation pipeline. The blowing nozzles are suspended on the sides of the strip steel through the corresponding supporting frames, and gas outlets of the blowing nozzles correspond to the surface of the strip steel. According to the utility model, the coating quality and passivation quality of the strip steel are improved, so that the edge quality of the strip steel is better, and the overall product quality is further improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot coating, and in particular relates to a device for blowing and drying the edge of a steel strip on a coating production line. Background Art

[0002] In the production process of steel coated products, the coated steel strips will come into contact with water in some processes. For example, the strip cleaning and degreasing section before coating needs to go through alkali washing, electrolysis, hot brushing, rinsing and other processes. After these processes, the steel strips enter the annealing furnace for annealing. Although the steel strips are dried by squeeze rollers and drying bellows before entering the annealing furnace, moisture is easily retained on the edges of both sides of the steel strips. After the steel strips with moisture enter the heating furnace, the high temperature environment will inhibit the reaction of hydrogen in the furnace to reduce iron oxide, resulting in incomplete reduction of the iron oxide on the steel strips, which in turn causes iron oxide to remain on the steel strips, and the water-stained areas of the steel strips are easily mixed with the iron powder on the furnace rollers. Together, the iron powder forms iron mud after drying and adheres to the strip. The above two situations will cause the coating to leak in the subsequent coating process, thus affecting the coating quality of the strip. In addition, the strip will undergo wet finishing after coating, and its surface will be sticky with water again. Even after subsequent straightening, squeezing with drying rollers and air drying with drying bellows, there will still be a certain amount of moisture left on the edges of both sides of the strip. In this way, when entering the subsequent passivation process, the wet parts will dilute the passivation liquid when reacting with the passivation liquid, affecting its passivation effect. At the same time, the passivation film will cover the water marks to form watermarks, resulting in poor edge passivation, seriously affecting the edge quality of the coated products, leading to product degradation, and thus affecting its overall production quality. Utility Model Content

[0003] The utility model aims to provide a device for blowing and drying the edges of steel strips on a coating production line, so as to solve the technical problem that moisture easily remains on the edges on both sides of the steel strips in the existing coating process, thereby affecting the product quality.

[0004] In order to achieve the above purpose, the specific technical solutions of the present utility model are as follows:

[0005] A device for blowing and drying the edges of steel strips in a coating production line comprises a ventilation pipe and a blowing nozzle, both of which are mounted on corresponding support frames, wherein one end of the ventilation pipe is connected to the blowing nozzle, and the other end of the ventilation pipe is externally connected to a corresponding air supply device, which provides compressed air to the blowing nozzle through the ventilation pipe, and the blowing nozzle is suspended on the side of the steel strip through the corresponding support frame, and its gas outlet corresponds to the surface of the steel strip.

[0006] Furthermore, the ventilation pipeline includes an air inlet pipeline and an air outlet pipeline, wherein the air inlet pipeline is made of a material that is not easy to deform, and its inlet end is externally connected to the air supply device, and the air outlet pipeline is arranged between the air inlet pipeline and the blowing nozzle, and its inlet end is connected to the outlet end of the air inlet pipeline, and its outlet end is connected to the blowing nozzle, and the air outlet pipeline is made of a high-pressure resistant flexible hose.

[0007] Furthermore, the support frame includes a support rod and a connecting rod, wherein one end of the support rod is connected to the outer wall of the middle part of the air intake pipe, and the other end is fixedly connected to the outside, and the connecting rod is arranged between the air intake pipe and the blowing nozzle, and its two ends are respectively connected to the air intake pipe and the blowing nozzle.

[0008] Furthermore, the connecting rod and the blowing nozzle are rotatably connected via a corresponding universal shaft.

[0009] Furthermore, a control valve for controlling the flow of gas is provided on the ventilation pipeline.

[0010] Furthermore, the blowing nozzle is in the shape of a strip with a wedge-shaped end face, and its gas outlet is in the shape of a single slit.

[0011] Furthermore, the blowing nozzle is arranged obliquely along the running direction of the strip steel, with its inner end close to the direction from which the strip steel comes and its outer end closer to the forward direction of the strip steel.

[0012] The utility model discloses a coating production line strip steel edge blowing and drying device which uses wind to blow away the residual moisture on both sides of the strip steel edge, so that the surface of the strip steel is dry. It blows the strip steel before coating and passivation respectively, which not only avoids the possibility of residual iron oxide and iron mud on the strip steel surface caused by residual moisture, thereby reducing the possibility of missing plating of the strip steel and improving the coating quality of the strip steel, but also avoids the influence of moisture on the passivation solution, reduces the generation of watermarks and adverse passivation effects, improves the passivation quality of the strip steel, and makes the overall quality of the product better. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 For this utility model Figure 1 A top view of

[0015] Figure 3 This is a schematic diagram of the structure of the blowing nozzle in the utility model;

[0016] Explanation of the markings in the figure: 1. Ventilation pipe; 11. Air inlet pipe; 12. Air outlet pipe; 13. Control valve; 2. Blowing nozzle; 21. Universal joint; 3. Support frame; 31. Support rod; 32. Connecting rod; 4. Strip steel. DETAILED DESCRIPTION

[0017] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of the device for blowing and drying the edge of steel strips in a coating production line of the present invention in conjunction with the accompanying drawings.

[0018] like Figure 1-3 As shown, the utility model relates to a strip edge blowing and drying device for a coating production line, comprising a ventilation pipe 1 and a blowing nozzle 2, wherein the blowing nozzle 2 is connected to one end of the ventilation pipe 1, and the other end of the ventilation pipe 1 is externally connected to a corresponding air supply device, and the air supply device provides compressed air to the blowing nozzle 2 through the ventilation pipe 1, and the ventilation pipe 1 and the blowing nozzle 2 are installed on a corresponding support frame 3, and the two are fixed to the outside through the corresponding support frame 3, wherein the blowing nozzle 2 is suspended on the edge of the surface of the strip 4 through the corresponding support frame 3, and the gas outlet of the blowing nozzle 2 corresponds to the surface of the strip 4, and the compressed air is blown toward the surface of the strip 4 through the blowing nozzle 2, and the residual moisture on the side surface of the strip 4 is blown away to make it dry, thereby reducing the possibility of the strip 4 causing leakage plating or poor passivation due to the residual moisture on the side, and further reducing the possibility of the strip 4 causing quality defects due to the residual moisture on the surface.

[0019] The ventilation pipeline 1 includes an air inlet pipeline 11 and an air outlet pipeline 12, wherein the air inlet pipeline 11 is made of a material that is not easily deformed. In this embodiment, the air inlet pipeline 11 is made of a metal material. When compressed air is introduced, it is not easily deformed due to excessive internal pressure. The inlet end of the air inlet pipeline 11 is externally connected to an air supply device. There are many forms of air supply devices, such as: an air compressor or a high-pressure gas tank, etc. In this embodiment, an air compressor is used as an air supply device to provide air for the ventilation pipeline 1. Compressed air, the inlet end of the air inlet pipe 11 is externally connected to the air compressor, and the air outlet pipe 12 is arranged between the air inlet pipe 11 and the blowing nozzle 2. Its inlet end is connected with the outlet end of the air inlet pipe 11, and its outlet end is connected with the blowing nozzle 2. The high-pressure air in the air inlet pipe 11 enters the blowing nozzle 2 through the air outlet pipe 12 and is then blown out. The air outlet pipe 12 is made of a high-pressure resistant flexible hose. This design makes it convenient for the air outlet pipe 12 to cooperate with the blowing nozzle 2 to adjust the blowing direction of the gas.

[0020] Furthermore, a corresponding control valve 13 is provided on the ventilation pipeline 1. In this embodiment, the control valve 13 is provided on the air inlet pipeline 11 of the ventilation pipeline 1. The control valve 13 controls the circulation of gas in the ventilation pipeline 1. It is in a closed state when not in operation. When in operation, the control valve 13 can control the size of the gas flow in the ventilation pipeline 1, thereby controlling the size of the air volume blown out by the blowing nozzle 2, so that it corresponds to the residual moisture on the edge of the batch of steel strip 4, so that the air volume of the blowing nozzle 2 can dry the moisture on the surface of the steel strip 4 without excessive waste. This design is more efficient and energy-saving.

[0021] The support frame 3 includes a support rod 31 and a connecting rod 32. The support frame 3 is connected to the outside through the support rod 31 to provide a fixed supporting force for the overall blowing and drying device, wherein one end of the support rod 31 is connected to the outer wall of the middle part of the air intake pipe 11, and the other end thereof is fixedly connected to the outside. In this embodiment, since the air intake pipe 11 is made of a metal material that is not easily deformed, it has a certain supporting force, so that it plays a certain supporting role in the overall blowing and drying device. The connecting rod 32 is arranged between the air intake pipe 11 and the blowing nozzle 2, and its two ends are respectively connected to the air intake pipe 11 and the blowing nozzle 2. The air intake pipe 11 provides supporting force for the blowing nozzle 2 through the connecting rod 32, so that it is suspended on the surface of the strip steel 4.

[0022] Furthermore, the connecting rod 32 and the blowing nozzle 2 are rotatably connected. In this embodiment, the two are rotatably connected using a corresponding universal joint 21, which facilitates adjusting the wind direction and angle of the blowing nozzle 2 blowing air to the strip steel 4 as needed, making it more suitable for the production needs of the current batch.

[0023] Furthermore, in this embodiment, a strip-shaped blowing nozzle 2 with a wedge-shaped end face is used, and its gas outlet is a single-slit shape. The wind blown out tends to be flat and broom-like, and can make the blown wind more concentrated and more conducive to blowing the four edges of the strip.

[0024] Furthermore, the blowing nozzle 2 is tilted along the running direction of the steel strip 4, with its inner end close to the direction from which the steel strip 4 comes, and its outer end closer to the forward direction of the steel strip 4. When there is too much moisture on the surface of the steel strip 4 and it is not easy to blow dry, the tilted setting of the blowing nozzle 2 makes it easier for it to blow part of the moisture out of the surface of the steel strip 4, thereby achieving the purpose of removing moisture from the surface of the steel strip 4.

[0025] The utility model discloses a coating production line strip edge blowing and drying device arranged in pairs on the upper and lower sides of the edge of the steel strip 4. The paired blowing and drying devices on both sides can share the same air supply device and the same set of support frames 3, which saves more energy and materials. The blowing nozzles 2 of the two paired blowing and drying devices correspond to the upper and lower surfaces of the steel strip 4, respectively, and blow compressed air to the corresponding surfaces of the steel strip 4. When in use, two corresponding pairs of blowing and drying devices are set on the left and right sides of the steel strip 4, and the steel strip 4 is blown respectively before coating and passivation. When blowing, first open the control valve 13 corresponding to each blowing and drying device, and adjust it to an appropriate air volume through the control valve 13. As the steel strip 4 moves forward, the two pairs of blowing and drying devices blow and dry the moisture remaining on the edges of the steel strip 4 on both sides, respectively, so that the surface of the steel strip 4 becomes dry. When the blowing work is completed, close the control valve 13 and wait for the next use.

[0026] The utility model discloses a coating production line strip edge blowing and drying device with simple structure, which uses wind force to blow and dry the residual moisture on both sides of the strip 4, so that the surface of the strip becomes dry. After the strip surface is free of moisture, no water molecules will affect the reduction of the iron oxide in the strip, thereby reducing the possibility of residual iron oxide on the strip surface, and no moisture will mix with the iron powder on the furnace roller, thereby reducing the possibility of iron mud sticking to the strip, thereby reducing the possibility of subsequent coating leakage caused by iron oxide or iron mud on the strip, thereby reducing the influence of residual surface moisture on the strip on its coating quality, thereby improving the surface quality of the strip coating, in addition, when the strip is passivated after wet finishing, after the strip surface moisture is blown dry by the blowing and drying device, there is no water to dilute the passivation solution, thereby reducing the influence of moisture on the passivation effect, avoiding the generation of watermarks, and reducing the possibility of poor passivation caused by moisture, thereby improving the edge quality of the strip and avoiding its degradation.

[0027] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A device for blowing and drying the edge of steel strips in a coating production line, characterized in that: It comprises a ventilation pipe (1) and a blowing nozzle (2), both of which are installed on a corresponding support frame (3), wherein one end of the ventilation pipe (1) is connected to the blowing nozzle (2), and the other end of the ventilation pipe (1) is externally connected to a corresponding air supply device, and the air supply device provides compressed air to the blowing nozzle (2) through the ventilation pipe (1), and the blowing nozzle (2) is suspended on the side of the strip steel (4) through the corresponding support frame (3), and its gas outlet corresponds to the surface of the strip steel (4).

2. The device for blowing and drying the edge of steel strips in a coating production line according to claim 1 is characterized in that: The ventilation pipeline (1) comprises an air inlet pipeline (11) and an air outlet pipeline (12), wherein the air inlet pipeline (11) is made of a material that is not easily deformed, and its inlet end is externally connected to the air supply device, and the air outlet pipeline (12) is arranged between the air inlet pipeline (11) and the blowing nozzle (2), and its inlet end is connected to the outlet end of the air inlet pipeline (11), and its outlet end is connected to the blowing nozzle (2), and the air outlet pipeline (12) is made of a high-pressure-resistant flexible hose.

3. The device for blowing and drying the edge of steel strips in a coating production line according to claim 2, characterized in that: The support frame (3) comprises a support rod (31) and a connecting rod (32), wherein one end of the support rod (31) is connected to the outer wall of the middle part of the air intake pipe (11), and the other end thereof is fixedly connected to the outside, and the connecting rod (32) is arranged between the air intake pipe (11) and the blowing nozzle (2), and its two ends are respectively connected to the air intake pipe (11) and the blowing nozzle (2).

4. The device for blowing and drying the edge of steel strips in a coating production line according to claim 3 is characterized in that: The connecting rod (32) and the blowing nozzle (2) are rotatably connected via a corresponding universal shaft (21).

5. The device for blowing and drying the edge of steel strips in a coating production line according to claim 1, characterized in that: The ventilation pipeline (1) is provided with a control valve (13) for controlling the flow of gas therethrough.

6. The device for blowing and drying the edge of steel strips in a coating production line according to claim 1, characterized in that: The blowing nozzle (2) is in the shape of a strip with a wedge-shaped end face, and its gas outlet is in the shape of a single slit.

7. The device for blowing and drying the edge of steel strips in a coating production line according to claim 1, characterized in that: The blowing nozzle (2) is arranged obliquely along the running direction of the steel strip (4), with its inner end close to the direction in which the steel strip (4) runs, and its outer end closer to the forward direction in which the steel strip (4) runs.

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