Descaling system suitable for billets in two shapes

Abstract

The utility model discloses a descaling system suitable for billets in two shapes, which comprises a roller bed frame, a descaling box body, a descaling header and a cover plate, the top surface of the descaling box body is open and arranged on the roller bed frame, the cover body is arranged on the top surface of the descaling box body, and the descaling header is arranged in the descaling box body and is provided with a water inlet used for being connected with a water inlet pipe; the number of the descaling collecting pipes is two, one descaling collecting pipe is square, the other descaling collecting pipe is round, the two descaling collecting pipes are arranged side by side in a spaced mode and connected with the water inlet pipe through the water inlet branch pipes respectively, and pneumatic three-way reversing valves are arranged at the joints of the two water inlet branch pipes and the water inlet pipe. The pneumatic three-way reversing valve is provided with a water inlet and two water outlets, the water outlet end of the water inlet pipe is connected with the water inlet of the pneumatic three-way reversing valve, and the water inlet ends of the two water inlet branch pipes are connected with the two water outlets of the pneumatic three-way reversing valve respectively. According to the utility model, steel billets in two shapes can be descaled without replacing the descaling header, so that the production efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical engineering, relates to descaling of steel billets, and particularly relates to a descaling system applicable to two-shaped steel billets. Background Technique

[0002] In the hot rolling production lines of steel mills for hot rolling bars, wire rods, and profiles, in order to meet different market demands, the rolling mills need to roll out different current products, such as bars, wire rods, flat steel, sections, etc. For the hot rolling steel billets to meet the needs of the rolling mills, the steel billets have different shapes such as round and square.

[0003] In the hot rolling production line, the steel billets are heated, and after being discharged from the furnace, they are descaled by a descaling box behind the furnace to remove the scale on the surface of the steel billets, and then rolled. Different-shaped steel billets bring difficulties to descaling. Different-shaped steel billets need to use corresponding-shaped descaling headers for descaling. For example, round steel billets need to use round descaling headers, square steel billets need to use square descaling headers, and for other-shaped steel billets, corresponding-shaped descaling headers also need to be designed according to their shapes.

[0004] Currently, in general hot rolling production lines, the descaling headers are replaced according to different-shaped steel billets. When rolling square steel billets, the square descaling headers are replaced, and when rolling round steel billets, the round descaling headers are replaced. However, the replacement of the descaling headers is very troublesome, and frequent replacement of the descaling headers is likely to cause water leakage at the sealing places, with a large workload and time-consuming, seriously affecting production efficiency. Summary of the Invention

[0005] Aiming at the above deficiencies existing in the prior art, the purpose of the utility model is to provide a descaling system applicable to two-shaped steel billets. The utility model can descale two-shaped steel billets without replacing the descaling headers, effectively improving production efficiency.

[0006] The technical solution of the utility model is realized as follows:

[0007] A descaling system applicable to two-shaped steel billets includes a roller table frame, a descaling box body, a descaling header, and a cover plate. The top surface of the descaling box body is open and is arranged on the roller table frame. The cover plate is arranged on the top surface of the descaling box body to seal the top surface of the descaling box body. The descaling header is arranged in the descaling box body, and the descaling header has a water inlet for connecting with a water inlet pipe to introduce high-pressure water. A plurality of nozzles are arranged on the descaling header, and all the nozzles face the direction of the steel billets and are inclined towards the surface of the steel billets.

[0008] There are two descaling headers. The two descaling headers have different shapes and are arranged side by side at intervals. The two descaling headers are respectively connected to the water inlet pipe through the water inlet branch pipes. A pneumatic three-way reversing valve is provided at the connection of the two water inlet branch pipes and the water inlet pipe. The pneumatic three-way reversing valve has one water inlet and two water outlets. The water outlet end of the water inlet pipe is connected to the water inlet of the pneumatic three-way reversing valve, and the water inlet ends of the two water inlet branch pipes are respectively connected to the two water outlets of the pneumatic three-way reversing valve.

[0009] Furthermore, it further includes a control unit. The control unit is connected to the pneumatic three-way reversing valve, facilitating the control unit to control the switching of the pneumatic one-way reversing valve according to the shape of the steel billet, so that high-pressure water enters the descaling header corresponding to the shape of the steel billet.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. The utility model arranges two descaling headers with different shapes in the descaling box body, enabling descaling of two different-shaped steel billets without replacing the descaling header. Thus, the work of replacing the descaling header is saved, the working intensity of the staff is reduced, and the working efficiency can be effectively improved at the same time.

[0012] 2. The utility model uses a pneumatic three-way reversing valve to switch the water inlet of the two descaling headers. One of the two water outlets of the pneumatic three-way reversing valve is always open and the other is closed, which can effectively avoid damage to the pipeline system caused by control failure. Description of the Drawings

[0013] Figure 1 - Structural schematic diagram of the utility model.

[0014] Figure 2 - Schematic diagram of the connection between the pneumatic three-way reversing valve of the utility model and the two descaling headers.

[0015] Figures 3 - 1 Sectional view A - A.

[0016] Figures 4 - 1 Sectional view B - B.

[0017] Wherein: 1 - roller table frame; 2 - roller table; 3 - steel billet; 4 - descaling box body; 5 - circular descaling header; 6 - cover plate; 7 - square descaling header; 8 - water blocking iron chain; 9 - pneumatic three-way reversing valve; 10 - nozzle. Detailed Embodiment

[0018] The following further elaborates on the utility model in detail in conjunction with the drawings and the detailed embodiment.

[0019] See Figure 1 、 Figure 2 、 Figure 3 and Figure 4, A descaling system applicable to billets of two shapes, including a roller table frame 1, a roller table 2, a descaling box body 4, a descaling header pipe, and a cover plate 6. The top surface of the descaling box body 4 is open and is arranged on the roller table frame 1. The roller table 2 is arranged on the roller table frame 1 for transporting the billet 3. Figure 1 In the direction of the arrow in Figure 1 is the running direction of the billet 3. The cover plate 6 is arranged on the top surface of the descaling box body 4 to seal the top surface of the descaling box body 4. The descaling header pipe is arranged inside the descaling box body 4, and the descaling header pipe 4 has a water inlet for connecting with a water inlet pipe to introduce high-pressure water. A number of nozzles 10 are arranged on the descaling header pipe. All the nozzles 10 face the direction of the billet 3 and are inclined towards the surface of the billet 3. The side towards which the nozzles face is the descaling inlet, and the side opposite is the descaling outlet. A water-blocking iron chain 8 is arranged on the corresponding sides of the descaling inlet and the descaling outlet.

[0020] There are two descaling header pipes. The shapes of the two descaling header pipes are different and they are arranged side by side at intervals. The two descaling header pipes are respectively connected to the water inlet pipe through water inlet branch pipes. A pneumatic three-way reversing valve 9 is arranged at the connection of the two water inlet branch pipes and the water inlet pipe. The pneumatic three-way reversing valve 9 has one water inlet and two water outlets. The water outlet end of the water inlet pipe is connected to the water inlet of the pneumatic three-way reversing valve 9, and the water inlet ends of the two water inlet branch pipes are respectively connected to the two water outlets of the pneumatic three-way reversing valve 9.

[0021] In this embodiment, one of the descaling header pipes is square, which is the square descaling header pipe 7, and the other descaling header pipe is circular, which is the circular descaling header pipe 5. In application, the square descaling header pipe, the circular descaling header pipe, and other shaped header pipes can be combined in pairs. In this way, during the operation process, the hot rolling production line does not need to replace the descaling header pipe to descale billets of two different shapes, thus saving the work of replacing the descaling header pipe, reducing the work intensity of the staff, and effectively improving the work efficiency at the same time.

[0022] In addition, because the entire pipeline system is in a high-pressure environment, if control valves are arranged on the two water inlet branch pipes to control whether high-pressure water enters the descaling header pipe, if the two control valves are closed due to misoperation during the automatic control process, this will cause the pressure of the entire pipeline system to be too high and damage the entire pipeline system. Here, a pneumatic three-way reversing valve is adopted. During the operation process, one water outlet of the pneumatic three-way reversing valve is always open and the other water outlet is closed, so as to effectively avoid damage to the pipeline system caused by control failure.

[0023] During specific implementation, a control unit is further included. The control unit is connected to the pneumatic three-way reversing valve 9, so that the control unit can control the pneumatic three-way reversing valve 9 to switch according to the shape of the billet 3, so that high-pressure water enters the descaling header pipe corresponding to the shape of the billet 3.

[0024] When the billet on the rolling line is square, the pneumatic three-way directional valve automatically switches, the water outlet corresponding to the square descaling header is opened, and the other water outlet is closed, so that high-pressure water enters the square descaling header to realize descaling of the square billet; when the billet on the rolling line is round, the pneumatic three-way directional valve automatically switches, the water outlet corresponding to the round descaling header is opened, and the other water outlet is closed, so that high-pressure water enters the round descaling header to realize descaling of the round billet.

[0025] Finally, it should be noted that the above embodiments of the present invention are only examples for explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes and modifications can be made based on the above description. It is impossible to list all the implementation manners here. Any obvious changes or modifications derived from the technical solutions of the present invention still fall within the protection scope of the present invention.

Claims

1. A descaling system suitable for two shapes of steel billets, comprising a roller stand, a descaling box, a descaling manifold and a cover plate, wherein the top surface of the descaling box is open and arranged on the roller stand, the cover plate is arranged on the top surface of the descaling box to close the top surface of the descaling box, the descaling manifold is arranged in the descaling box, and the descaling manifold has a water inlet for connecting with a water inlet pipe to introduce high-pressure water, and a plurality of nozzles are arranged on the descaling manifold, all of which are arranged toward the direction of the steel billet and inclined toward the surface of the steel billet; characterized in that: There are two descaling manifolds, which have different shapes and are arranged side by side. The two descaling manifolds are connected to the water inlet pipe through water inlet branches respectively. A pneumatic three-way reversing valve is provided at the connection between the two water inlet branches and the water inlet pipe. The pneumatic three-way reversing valve has a water inlet and two water outlets. The water outlet end of the water inlet pipe is connected to the water inlet of the pneumatic three-way reversing valve, and the water inlet ends of the two water inlet branches are respectively connected to the two water outlets of the pneumatic three-way reversing valve.

2. A descaling system suitable for two shapes of steel billets according to claim 1, characterized in that: It also includes a control unit, which is connected to the pneumatic three-way reversing valve, so that the control unit can control the switching of the pneumatic one-way reversing valve according to the shape of the steel billet to allow high-pressure water to enter the descaling manifold corresponding to the shape of the steel billet.

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