A strip surface anti-pollution blowing device for a finishing zone of a hot strip rolling mill

Abstract

The utility model relates to hot-rolled plate strip rolling mill finishing area surface antifouling technical field, concretely refers to a kind of hot-rolled plate strip rolling mill finishing area strip steel upper surface antifouling blowing device, and the device contains surface blowing nozzle device, hard pipe, hose, pipe clamp and blowing water collecting device.Nozzle device is installed in the lap operation side swing arm, can be raised with lap.The hard pipe is fixed in swing arm through pipe clamp, is connected with working roll cooling water mother pipe tap through the hose with sufficient excess, and the water inlet pressure of nozzle is same with working roll cooling water, exceeds 1.0MPa, selects suitable sector angle nozzle strong blowing.The blowing water collecting device is arranged in the transmission side, collects the blowing water of nozzle side, prevents its influence transmission side.The utility model solves the problem that the existing finishing mill set entrance rusted iron sheet is easy to drop on the upper surface of steel plate, causing iron oxide sheet to be pressed in, and other equipment between rack is also easy to drop on the problem that dirt adhered on the surface of steel plate in rolling process.

Description

Technical Field

[0001] This utility model relates to the field of surface anti-fouling technology in the finishing zone of hot-rolled strip mills, specifically to an anti-fouling blowing device for the upper surface of strip steel in the finishing zone of hot-rolled strip mills. Background Technology

[0002] The working environment of the finishing mill in domestic hot strip rolling production lines is harsh. The inlet and outlet equipment includes inlet side guides, inlet guard plates, outlet guard plates, inlet side guides, elevation adjustment devices, strip cooling and dust removal water systems, protective covers and horizontal spray devices, and cooling water piping for loopers and work roll support rolls. This environment is characterized by high humidity and temperature, making it prone to rust and corrosion. After prolonged use, impurities and iron oxide scale inevitably adhere to the strip. These impurities and scale can fall onto the strip surface due to vibrations during rolling, causing indentations or roll marks. Modern production demands increasingly higher quality steel plate surfaces, requiring the absence of any indentations or roll marks. Therefore, ensuring the steel plate surface is free of these defects during rolling requires a method that can effectively remove impurities, dirt, and iron oxide scale, ensuring a clean surface before the steel plate enters the rear stand of the rolling mill. This is a key factor in guaranteeing the surface quality of the steel plate.

[0003] The finishing mills, especially the F5-F7 rolling process, have the following problems:

[0004] 1. The scraper frame at the inlet of the finishing mill is located in an environment with high humidity and high temperature, which makes it prone to rust and severe corrosion. Rusty iron scale falls onto the surface of the steel plate, causing iron oxide scale to be pressed in.

[0005] 2. During the rolling process, dirt attached to other equipment between the stands, such as cooling water pipes, protective covers, and horizontal spraying devices, may fall onto the surface of the steel plate due to mill vibration. Utility Model Content

[0006] The technical problem this utility model aims to solve is that the existing finishing mill inlet scraper frame is prone to rust and severe corrosion due to the high humidity and high temperature of the environment where the heat insulation plate is located. Rusted iron scale falls onto the surface of the steel plate, causing iron oxide scale to be pressed in. During the rolling process, dirt attached to other equipment between stands can also easily fall onto the surface of the steel plate due to mill vibration and other reasons.

[0007] To solve the above problems, the technical solution adopted by this utility model is a surface anti-fouling blowing device for the upper surface of strip steel in the finishing zone of a hot-rolled strip mill. The device includes a surface blowing nozzle assembly, a rigid pipe, a flexible hose, a pipe clamp, and a blowing water collection device. The surface blowing nozzle assembly is installed on the swing arm on the looper operating side, and the nozzle can move up and down with the looper. The rigid pipe connected to the nozzle is fixed to the swing arm on the looper operating side with a pipe clamp. The rigid pipe is connected to a tap at an appropriate position on the cooling water header of the work roll via a flexible hose. The flexible hose has sufficient slack to allow the nozzle to move up and down with the looper roll. The nozzle inlet water pressure is the same as the working roll cooling water pressure, which is above 1.0 MPa. Strong blowing capability is achieved by selecting a nozzle with a suitable fan angle. The blowing water collection device is arranged at a corresponding position on the drive side to collect the blowing water generated by the nozzle side-spraying method, preventing the blowing water from corroding the equipment on the drive side.

[0008] As a further embodiment of this utility model: the surface blowing nozzle device is installed on the swing arm on the operating side of the looper, and can move synchronously with the up and down movement of the looper roller, ensuring that the blowing water can always be accurately blown onto the surface of the strip steel, and the blowing position will not change due to the change of the position of the looper roller.

[0009] As a further embodiment of this invention: after the rigid tube is connected to the nozzle, it is firmly fixed to the swing arm on the operating side of the looper using a tube clamp to ensure the stability of the rigid tube during the lifting and lowering of the looper roller and to prevent the swaying of the rigid tube from affecting the purging effect of the nozzle.

[0010] As a further embodiment of this invention: one end of the hose is connected to the rigid pipe, and the other end is connected to a tap at an appropriate position on the cooling water header of the working roller. The hose is provided with sufficient slack to accommodate the purging requirements of the nozzles at different height positions of the looper roller, ensuring the continuity and stability of the purging water supply.

[0011] As a further embodiment of this utility model, the purge water collection device is set at the position corresponding to the nozzle on the swing arm on the transmission side and the operating side of the looper. Its structure can effectively collect the purge water generated by the side spray purging method, prevent the purge water from splashing onto the transmission side equipment, and avoid corrosion of the transmission side equipment due to the purge water.

[0012] The advantages of this utility model compared with the prior art are as follows:

[0013] This application allows for synchronous movement with the looper rollers, precisely cleaning the strip surface and preventing changes in the looper roller position from affecting the cleaning position. The rigid pipe is securely fixed to prevent shaking from affecting the cleaning effect, and the flexible hose has sufficient slack to ensure a continuous and stable supply of cleaning water. The cleaning water collection device effectively collects the cleaning water, preventing it from splashing onto the transmission side equipment and avoiding corrosion. This effectively solves the problem of rust and dirt falling onto the strip surface causing imprints or roller marks in existing equipment, ensuring the surface quality of the steel plate. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the structure of the anti-fouling blowing device for the upper surface of strip steel in the finishing zone of a hot-rolled strip mill according to this utility model.

[0016] Figure 2 This is a schematic diagram showing the installation position of an anti-fouling blowing device for the upper surface of strip steel in the finishing zone of a hot-rolled strip mill, according to this utility model.

[0017] Figure 3 This is a schematic diagram showing the installation position of an anti-fouling blowing device for the upper surface of strip steel in the finishing zone of a hot-rolled strip mill, according to this utility model.

[0018] In the attached image:

[0019] 1. Surface purging nozzle device; 2. Purging water collection device; 1.1. Rigid pipe; 1.2. Pipe clamp; 1.3. Nozzle. Detailed Implementation

[0020] 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 protection scope of the present utility model.

[0021] This utility model provides a technical solution to address the existing problems mentioned in the background art.

[0022] Combined with appendix Figure 1-3 First, install the surface purging nozzle device 1 on the swing arm of the looper operating side, ensuring that the nozzle 1.3 can move up and down with the looper. Securely fix the rigid pipe 1.1 connected to the nozzle 1.3 to the swing arm of the looper operating side using pipe clamps 1.2, ensuring the stability of the rigid pipe 1.1 during the looper roller's lifting and lowering process. Connect one end of the flexible hose to the rigid pipe 1.1 and the other end to a tap at an appropriate position on the working roller cooling water header, ensuring sufficient slack in the hose to accommodate the purging needs of the nozzle 1.3 at different heights of the looper roller. Set the purging water collection device 2 on the drive side, corresponding to the nozzle 1.3 on the swing arm of the looper operating side, and adjust the system to ensure that the inlet water pressure of the nozzle 1.3 is the same as the working roller cooling water pressure, and maintains the pressure above 1.0 MPa. Simultaneously, select a nozzle 1.3 with a suitable fan angle according to actual purging requirements to achieve strong purging capability.

[0023] The working principle of this utility model is as follows: During the steel rolling process, the surface cleaning nozzle device 1 moves synchronously with the up and down movement of the looper roll. Since the rigid pipe 1.1 is firmly fixed to the looper operating side swing arm by the pipe clamp 1.2, the stability of the rigid pipe 1.1 is ensured, preventing it from swaying due to the movement of the looper roll. Sufficient slack in the flexible hose ensures that the nozzle 1.3 can operate normally at different heights of the looper roll. At this time, water from the working roll cooling water header enters the nozzle 1.3 through the tap, flexible hose, and rigid pipe. Because the water inlet pressure of the nozzle 1.3 is above 1.0 MPa and a suitable fan angle is selected, the sprayed water forms a powerful water flow, precisely cleaning the surface of the strip steel, removing debris, dirt, or iron oxide scale, ensuring that the strip steel is free of dirt before entering the rear stand of the rolling mill. The nozzle 1.3 uses a side-spray cleaning method, and the cleaning water generated during the cleaning process will splash. The purge water collection device 2, arranged at the corresponding position on the transmission side, has a structure that can effectively collect the purge water and prevent it from splashing onto the transmission side equipment, thereby avoiding corrosion of the transmission side equipment due to the purge water.

[0024] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A device for preventing contamination and blowing away dirt on the upper surface of strip steel in the finishing zone of a hot-rolled strip mill, characterized in that, The device includes a surface purging nozzle device (1), a rigid pipe (1.1), a flexible hose, a pipe clamp (1.2), and a purging water collection device (2). The surface purging nozzle device (1) is installed on the swing arm of the looper operation side, and the nozzle (1.3) can move up and down with the looper. The rigid pipe (1.1) connected to the nozzle (1.3) is fixed on the swing arm of the looper operation side with a pipe clamp (1.2). The rigid pipe (1.1) is connected to the tap at an appropriate position of the cooling water header of the working roller through the flexible hose. The flexible hose has sufficient slack so that the nozzle (1.3) can move up and down with the looper roller. The water inlet pressure of the nozzle (1.3) is the same as the cooling water pressure of the working roller, and the pressure is above 1.0 MPa. Strong purging capability is achieved by selecting a nozzle (1.3) with a suitable fan angle. The purging water collection device (2) is arranged at the corresponding position on the transmission side and is used to collect the purging water generated by the side spray purging method of the nozzle (1.3).

2. The anti-fouling blowing device for the upper surface of strip steel in the finishing zone of a hot-rolled strip mill according to claim 1, characterized in that: The surface purging nozzle device (1) is mounted on the swing arm on the looper side.

3. The anti-fouling blowing device for the upper surface of strip steel in the finishing zone of a hot-rolled strip mill according to claim 1, characterized in that: After the rigid tube (1.1) is connected to the nozzle (1.3), it is firmly fixed to the swing arm on the operating side of the looper using the tube clamp (1.2) to ensure the stability of the rigid tube (1.1) during the lifting and lowering of the looper roller and prevent the swaying of the rigid tube (1.1) from affecting the sweeping effect of the nozzle (1.3).

4. The anti-fouling blowing device for the upper surface of strip steel in the finishing zone of a hot-rolled strip mill according to claim 1, characterized in that: One end of the flexible hose is connected to the rigid pipe (1.1), and the other end is connected to a tap at an appropriate position on the cooling water header of the working roller, so as to meet the purging requirements of the nozzle (1.3) when the looper roller is at different height positions.

5. The anti-fouling blowing device for the upper surface of strip steel in the finishing zone of a hot-rolled strip mill according to claim 1, characterized in that: The purge water collection device (2) is located on the transmission side and at the position corresponding to the nozzle (1.3) on the swing arm of the looper operation side.

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