Pre-through water cooling device of rolling mill

Abstract

The utility model relates to the technical field of rolling mills, and discloses a rolling mill pre-through water cooling device which comprises a device bottom frame, a water tank arranged in the device bottom frame and a rolling mill cooling device, the rolling mill cooling device comprises an inlet guide pipe, the inlet guide pipe is in flange connection with a pre-cooling seat, and the right end of the pre-cooling seat is in flange connection with a water cooling seat. A right end flange of the water cooling seat is connected with a liner tube seat, a right end flange of the liner tube seat is connected with a water return seat, the liner tube seat comprises a cooling tube and a plurality of liner tubes arranged in the cooling tube, an attached spiral plate is arranged between the inner tube and the liner tube, the spiral plate is provided with dimples, and one side outside the liner tube is provided with a liner tube nozzle connected with a water pipe. The spiral plate is arranged between the cooling pipe and the liner pipe, so that water flow moves forwards along the spiral plate, and the contact time of the water flow and the liner pipe is prolonged; and the dimples can enhance the disturbance of the fluid to the surface of an object, so that vortexes with different scales are generated when the fluid flows through the dimples, the loss rate of heat on the wall surface is increased due to the vortexes, and the heat dissipation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rolling mills, and specifically relates to a pre-water-piercing cooling device for a rolling mill. Background Technique

[0002] The pre-water-piercing cooling device of a rolling mill is an important device in the steel rolling process. It controls the temperature and shape of steel through water cooling to achieve the required processing effect. During use, the cooling water is atomized into fine water droplets by a nozzle and sprayed onto the surface of the high-temperature steel. The water droplets quickly evaporate, taking away a large amount of heat and rapidly cooling the surface of the steel. Therefore, the pre-water-piercing cooling device of a rolling mill is mainly applied to the bar and wire rod steel rolling production line and is an important means to control the temperature and shape of steel. Through precise cooling control, steel products that meet the requirements can be produced.

[0003] Currently, the patent with the publication number CN211707730U discloses a pre-water-piercing cooling device, which includes an inlet guiding pipe. The inlet guiding pipe is connected with a pre-cooling seat through a flange. The right end of the pre-cooling seat is connected with a water-cooling seat through a flange. A first water-cooling guide and a second water-cooling guide are horizontally arranged inside the water-cooling seat; the right end of the water-cooling seat is connected with an intermediate pipe through a second flange. A plurality of groups of lining pipes are arranged inside the intermediate pipe; the right end of the intermediate pipe is connected with a return water seat through a first flange. An outlet guide is arranged inside the return water seat and on the left side of the flange at the right end; the right end of the return water seat is connected with an anti-blowing seat through a flange. An anti-blowing guide is arranged inside the anti-blowing seat. The utility model plays a cooling role between two rolling mills, and both the front and back adopt a flange-mounted positioning method. Compared with a positioning pin, the flange-type guide has a long service life. The distance of this water-piercing cooling device is short, which is suitable for cooling between rolling mills and solves the problem of too high temperature before rolling.

[0004] Although the above device solves problems such as the short service life of the positioning pin, it still has the following deficiencies:

[0005] During use, the water is atomized into fine water droplets by a nozzle and sprayed onto the surface of the high-temperature steel. This cooling method has low efficiency, and it is difficult for the water mist to dissipate heat evenly. Undoubtedly, more water mist will fall on the steel at the nozzle. Therefore, the atomizing nozzle is not suitable for the treatment process of a longer lining pipe. Content of the Utility Model

[0006] Aiming at the deficiencies of the prior art, the utility model provides a pre-water-piercing cooling device for a rolling mill, which improves the heat dissipation efficiency at the lining pipe through the cooperation of a spiral plate and a honeycomb cell.

[0007] To achieve the above object, the utility model provides the following technical solutions: A pre-piercing water cooling device for a rolling mill, which includes a device chassis, a water tank arranged inside the device chassis, and a rolling mill cooling device arranged on the device chassis. The rolling mill cooling device includes an inlet conduit, the inlet conduit is flange-connected to a pre-cooling seat, the right end of the pre-cooling seat is flange-connected to a water-cooling seat, the right end of the water-cooling seat is flange-connected to a liner seat, the right end of the liner seat is flange-connected to a backwater seat. The liner seat includes a cooling pipe and a number of liners arranged inside the cooling pipe. A fitting spiral plate is arranged between the cooling pipe and the liners inside the pipe, and a dimple is arranged on the spiral plate. On one side outside the liner, there is a liner nozzle connected to a water pipe.

[0008] Further, a bracket is arranged between the rolling mill cooling device and the device chassis. The pre-cooling seat, the water-cooling seat, the liner seat, and the backwater seat are connected to the water tank through water pipes. The water pipes are divided into an inlet pipe and an outlet pipe. A water pump is arranged at the connection of the water tank and the inlet pipe. The bracket is provided with a water pipe hole for passing the outlet pipe.

[0009] Further, the right end of the backwater seat is flange-connected to a back-blowing air seat. A back-blowing air guide is arranged inside the back-blowing air seat. A blower is arranged on the back-blowing air seat. An annular jet plate connected to the blower is arranged inside the back-blowing air seat.

[0010] Further, the water-cooling seat includes a first water-cooling guide and a second water-cooling guide. A spray plate connected to the inlet pipe is arranged above the first water-cooling guide and the second water-cooling guide.

[0011] Further, an annular groove is arranged at the joint where the first water-cooling guide fits with the second water-cooling guide, and the second water-cooling guide is provided with an annular convex block.

[0012] Further, both sides of the liner are set to a "V" shape structure. Annular blocks are arranged inside both ends of the liner. The liners are fixed by the fitting of the annular blocks.

[0013] Further, dimples are also arranged on the outer surface of the liner.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] By arranging a spiral plate that fits both the cooling pipe and the liner between the cooling pipe and the liner, when the cooling water enters between the cooling pipe and the liner through the liner nozzle, the water flow advances along the spiral plate, increasing the contact time between the water flow and the liner. The dimples on the spiral plate can enhance the disturbance of the fluid to the object surface and break the original boundary layer, causing the fluid to generate vortices of different scales when flowing through. The existence of the vortices speeds up the heat dissipation rate of the wall surface and improves the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the whole utility model;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model after removing the rolling mill cooling device;

[0018] Figure 3 It is a schematic diagram of the three-dimensional structure of the rolling mill cooling device of the utility model after being cut apart;

[0019] Figure 4 This is a schematic diagram of the three-dimensional structure of the water cooling seat of the utility model after being cut open;

[0020] Figure 5 It is a schematic diagram of the three-dimensional structure of the liner seat of the utility model after being cut open;

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the recoil air seat after being cut open.

[0022] In the figure: 1. device chassis; 2. water tank; 3. rolling mill cooling device; 4. inlet duct; 5. pre-cooling seat; 6. water cooling seat; 601. first water cooling guide; 602. second water cooling guide; 603. water spray plate; 604. annular groove; 605. annular protrusion; 7. liner seat; 701. cooling pipe; 702. liner; 703. spiral plate; 704. liner nozzle; 705. annular block; 8. recoil water seat; 9. Ding cell; 10. bracket; 11. water pump; 12. water pipe hole; 13. recoil air seat; 14. recoil air guide; 15. blower; 16. annular jet plate. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] like Figures 1 to 6 As shown, a rolling mill pre-penetration water cooling device includes a device base frame 1, a water tank 2 arranged in the device base frame 1 and a rolling mill cooling device 3 arranged on the device base frame 1, the rolling mill cooling device 3 includes an inlet duct 4, the inlet duct 4 is flange-connected with a pre-cooling seat 5, the right end of the pre-cooling seat 5 is flange-connected with a water cooling seat 6, the right end of the water cooling seat 6 is flange-connected with a liner seat 7, the right end of the liner seat 7 is flange-connected with a rebound water seat 8, the liner seat 7 includes a cooling pipe 701 and a plurality of liners 702 arranged in the cooling pipe 701, a fitting spiral plate 703 is arranged between the cooling pipe 701 and the liner 702, a Ding cell 9 is arranged on the spiral plate 703, and a liner nozzle 704 connected to the water pipe is arranged on the outer side of the liner 702.

[0025] like Figure 1As shown in the figure, the pre-water-piercing cooling device in the present utility model is similar in structure to the existing pre-water-piercing cooling device. For example, a patent with the publication number CN211707730U discloses a pre-water-piercing cooling device. The main improvement of the present utility model lies in the cooperation of the spiral plate 703 and the dimpled cell 9, which improves the heat dissipation efficiency at the liner tube, as Figures 1 to 6 As shown in the figure, in the pre-water-piercing cooling device of the rolling mill in the present utility model, during use, the billet is placed into the inlet conduit 4 and passes through the pre-cooling seat 5, water-cooling seat 6, liner tube seat 7, counter-return water seat 8, and counter-return air seat 13 in sequence. During the cooling process, the pre-cooling seat 5 first cools the bar stock initially and cleans the bar stock to keep no attached debris on the bar stock. Then, through the water-cooling guide in the water-cooling seat 6, the guide can ensure that the rolled piece enters and exits the roll pass accurately and stably in the established direction and state. Then, through the liner tube 702 of the liner tube seat 7, the liner tube 702 can increase the hardness and wear resistance of the inner wall of the pipeline, reduce friction and wear, thereby extending the service life of the pipeline. By arranging the spiral plate 703 that fits both the cooling tube 701 and the liner tube 702, after the cooling water enters the space between the cooling tube 701 and the liner tube 702 through the nozzle of the liner tube 702, the water flow advances along the spiral plate 703, increasing the contact time between the water flow and the liner tube 702. The dimpled cell 9 on the spiral plate 703 can enhance the disturbance of the fluid to the object surface and destroy the original boundary layer, causing different-scale vortices to be generated when the fluid flows through. The existence of the vortices speeds up the heat dissipation rate of the wall surface and improves the heat dissipation efficiency. Subsequently, the bar stock passes through the counter-return water seat 8 and the counter-return air seat 13, and is respectively cleaned and dried to complete the cooling of the bar stock.

[0026] As Figure 1 and Figure 2 As shown in the figure, a bracket 10 is provided between the rolling mill cooling device 3 and the device chassis 1. The pre-cooling seat 5, water-cooling seat 6, liner tube seat 7, and counter-return water seat 8 are connected to the water tank 2 through water pipes. The water pipes are divided into inlet pipes and outlet pipes. A water pump 11 is provided at the connection of the water tank 2 and the inlet pipe. The bracket 10 is provided with a water pipe hole 12 for passing the outlet pipe.

[0027] Specifically, through the water pump 11, the water in the water tank 2 can be respectively sent into the pre-cooling seat 5, water-cooling seat 6, liner tube seat 7, and counter-return water seat 8 to cool the bar stock. Subsequently, the water in the device will flow through the outlet pipe from the outlet reserved at the lower end and return to the water tank 2, realizing the recycling of water.

[0028] As Figure 6 As shown in the figure, the right end flange of the counter-return water seat 8 is connected to the counter-return air seat 13. A counter-return air guide 14 is provided in the counter-return air seat 13. A blower 15 is provided on the counter-return air seat 13. An annular jet plate 16 connected to the blower 15 is provided in the counter-return air seat 13.

[0029] Specifically, the blower 15 is used to inflate the annular jet plate 16, so that the gas rushes out from the inner pores of the annular jet plate 16 and dries the bar.

[0030] As Figure 3 and Figure 4 shown, the water-cooled seat 6 includes a first water-cooled guide 601 and a second water-cooled guide 602. Above the first water-cooled guide 601 and the second water-cooled guide 602, there is a water spray plate 603 connected to the water inlet pipe. The first water-cooled guide 601 is provided with an annular groove 604 at the joint with the second water-cooled guide 602, and the second water-cooled guide 602 is provided with an annular protrusion 605 corresponding to the annular groove 604.

[0031] Specifically, in order to fix the first water-cooled guide 601 and the second water-cooled guide 602, they are fitted through the annular groove 604 and the annular protrusion 605, so that the two water-cooled guides in the water-cooled seat 6 can be fixed. The water spray plate 603 can atomize the water flow to cool the water-cooled guides, and can prevent the bar from continuously transferring heat to the water-cooled guides when passing through the guides.

[0032] As Figure 3 and Figure 5 shown, both sides of the liner 702 are set as "V" - shaped structures, and annular blocks 705 are arranged on the inner sides of both ends of the liner 702. The liners 702 are fixed by the fitting of the annular blocks 705.

[0033] Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pre-water-piercing cooling device for a rolling mill, comprising a device chassis (1), a water tank (2) arranged within the device chassis (1), and a rolling mill cooling device (3) arranged on the upper surface of the device chassis (1), characterized in that, The rolling mill cooling device (3) includes an inlet conduit (4), which is flange-connected to a pre-cooling seat (5). The right end of the pre-cooling seat (5) is flange-connected to a water-cooling seat (6). The right end of the water-cooling seat (6) is flange-connected to a liner seat (7). The right end of the liner seat (7) is flange-connected to a counter-return water seat (8). The liner seat (7) includes a cooling pipe (701) and a number of liners (702) arranged inside the cooling pipe (701). A fitting spiral plate (703) is arranged between the cooling pipe (701) and the liner (702) inside the pipe. A stud cell (9) is arranged on the spiral plate (703). A liner nozzle (704) connected to a water pipe is arranged on one side outside the liner (702).

2. The pre-piercing water cooling device for a rolling mill according to claim 1, characterized in that, A bracket (10) is arranged between the rolling mill cooling device (3) and the device chassis (1). The pre-cooling seat (5), the water-cooling seat (6), the liner seat (7) and the counter-return water seat (8) are connected to a water tank (2) through water pipes. The water pipes are divided into an inlet pipe and an outlet pipe. A water pump (11) is arranged at the connection of the water tank (2) and the inlet pipe. The bracket (10) is provided with a water pipe hole (12) for passing the outlet pipe.

3. A pre-water-piercing cooling device for a rolling mill according to claim 1, characterized in that, The right end of the counter-return water seat (8) is flange-connected to a counter-return air seat (13). A counter-return air guide (14) is arranged inside the counter-return air seat (13). A blower (15) is arranged on the counter-return air seat (13). An annular jet plate (16) connected to the blower (15) is arranged inside the counter-return air seat (13).

4. A pre-piercing water cooling device for a rolling mill according to claim 1, characterized in that, The water-cooling seat (6) includes a first water-cooling guide (601) and a second water-cooling guide (602). A water spraying plate (603) connected to the inlet pipe is arranged above the first water-cooling guide (601) and the second water-cooling guide (602).

5. The pre-piercing water cooling device for a rolling mill according to claim 4, characterized in that, An annular groove (604) is arranged at the joint where the first water-cooling guide (601) is in contact with the second water-cooling guide (602). The second water-cooling guide (602) is provided with an annular projection (605) corresponding to the annular groove (604).

6. The pre-water-piercing cooling device for a rolling mill according to claim 1, characterized in that Both sides of the liner (702) are arranged in a "V" shape. Annular blocks (705) are arranged inside both ends of the liner (702). The liners (702) are fixed by the fitting of the annular blocks (705).

7. A pre-water-piercing cooling device for a rolling mill according to claim 1, characterized in that, Stud cells (9) are also arranged on the outer surface of the liner (702).

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