A cooling control device for hot-rolled ribbed steel bars and a cooling control method thereof

Abstract

This invention belongs to the field of ribbed steel bar cooling technology, specifically relating to a controlled cooling device and method for hot-rolled ribbed steel bars. The controlled cooling device includes a base plate, a mounting seat fixed to the top of the base plate, a first water circulation tank slidably mounted on the top of the mounting seat, a mounting frame fixed to the top of the base plate and one side of the mounting seat, and a second water circulation tank fixed to one side of the mounting frame. A detachable water-cooling pipe is provided between the first and second water circulation tanks. The inner wall of the water-cooling pipe is provided with a spiral liner, and the outer wall of the spiral liner has multiple ball grooves. Ball blocks are rolled inside the ball grooves. This invention enables the cooling water to fully contact the surface of the ribbed steel bar, improving the uniformity and efficiency of cooling, thereby enhancing the cooling effect. The included collection box facilitates the collection and filtration of impacted oxide impurities, preventing blockage.

Description

Technical Field

[0001] This invention belongs to the field of hot-rolled ribbed steel bar cooling technology, specifically relating to a controlled cooling device and method for hot-rolled ribbed steel bars. Background Technology

[0002] Hot-rolled ribbed steel bars are one of the most widely used steel products in civil engineering. They have high strength, good plasticity and toughness, and are widely used for reinforcement in reinforced concrete and prestressed concrete structures. Controlled cooling process is an important part of the production of hot-rolled ribbed steel bars. By controlling the cooling process, the mechanical properties of the steel bars and production efficiency can be significantly improved.

[0003] Currently, in the controlled cooling process of hot-rolled ribbed steel bars, the hot-rolled ribbed steel bars need to pass through water cooling pipes and come into contact with cooling water. However, one side of the ribbed steel bar in the water cooling pipe is always in contact with the inner wall of the water cooling pipe, which prevents the cooling water from fully contacting the outer wall of the ribbed steel bar. This results in uneven cooling of the ribbed steel bar. In addition, when the ribbed steel bar comes into contact with the cooling water, a layer of vapor film will oxidize on the surface of the ribbed steel bar. Under the impact of the cooling water, this film will fall into the water cooling pipe. Over time, this accumulation will cause blockage of the water cooling pipe and affect the normal use of the equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a controlled cooling device and method for hot-rolled ribbed steel bars, which enables the cooling water to fully contact the surface of the ribbed steel bars, improves the uniformity and efficiency of cooling, and thus improves the cooling effect. The collection box is designed to collect and filter the oxide impurities that are knocked off, thus avoiding blockage.

[0005] The specific technical solution adopted by this invention is as follows:

[0006] A controlled cooling device for hot-rolled ribbed steel bars includes a base plate, a mounting base fixed to the top of the base plate, a first water circulation tank slidably mounted on the top of the mounting base, a mounting frame fixed to the top of the base plate and on one side of the mounting base, and a second water circulation tank fixed to one side of the mounting frame. A detachable water-cooling pipe is provided between the first and second water circulation tanks. The inner wall of the water-cooling pipe is provided with a spiral liner, and the outer wall of the spiral liner has multiple ball grooves. Ball blocks are rolled inside the ball grooves. A detachable collection pipe is provided at the bottom of the second water circulation tank, and the bottom of the collection pipe is connected to the collection tank. Connecting lugs are fixed to both sides of the collection tank and are bolted to the outer wall of the second water circulation tank. An inlet pipe is fixed to one side of the first water circulation tank, and a drain pipe is fixed to one side of the second water circulation tank.

[0007] Furthermore, a funnel-shaped cover is provided on the inner wall of the second water circulation tank and below the water cooling pipe. Multiple filter holes are provided through the outer wall of the funnel-shaped cover. A sealing groove is provided through the bottom of the second water circulation tank corresponding to the funnel-shaped cover, and a collection pipe is inserted into the inside of the sealing groove. A flow-blocking component is provided at the bottom of the collection pipe.

[0008] Furthermore, the flow-blocking assembly includes a first rotating shaft rotatably mounted on the inner wall of the collecting pipe near the sealing groove, a sealing disc fixed on the outer wall of the first rotating shaft, a rubber sealing ring provided on the top of the sealing disc, a worm gear provided at one end of the first rotating shaft extending to the outside of the collecting pipe, two fixing ears fixed on the top of the collecting box, a second rotating shaft rotatably mounted between the outer walls of the two fixing ears, and a worm gear meshing with the worm gear provided on the outer wall of the second rotating shaft.

[0009] Furthermore, the other end of the first rotating shaft passes through the outer wall of the collecting tube and is fixed with a limiting rod. The outer wall of the collecting tube is provided with two limiting blocks corresponding to the limiting rod, and the two limiting blocks are arranged at a 90-degree angle with the first rotating shaft as the center.

[0010] Furthermore, both ends of the water-cooled pipe are sealed and rotatably installed with connecting pipes. The outer walls of the first water circulation tank and the second water circulation tank are provided with connecting holes corresponding to the connecting pipes, and the connecting pipes are threadedly screwed into the connecting holes.

[0011] Furthermore, a connecting sleeve is provided on the other side of both the first water circulation tank and the second water circulation tank. The inner wall of the connecting sleeve is provided with a deformable sealing ring, and the outer wall of the connecting sleeve is provided with a clamp.

[0012] A method for controlled cooling of hot-rolled ribbed steel bars includes the following steps:

[0013] Step 1: The ribbed steel bars exported from the hot rolling mill are exported into the atomization channel, and the atomization extrusion equipment is started to perform atomization cooling and extrusion on the surface of the ribbed steel bars.

[0014] Step 2: A second water circulation box is set at the outlet of the atomization channel so that the atomized and cooled ribbed steel bars are introduced into the second water circulation box and enter the water cooling pipe along the second water circulation box. At the same time, the external cooling water inlet pipe enters and exits from the drain pipe. The flow direction of the cooling water moves in the opposite direction to the ribbed steel bars, washing away the oxide impurities on the surface of the ribbed steel bars. At the same time, a cooling water channel is formed in the water cooling pipe to cool the ribbed steel bars.

[0015] Step 3: In step 2, the oxide impurities washed away from the ribbed steel bars enter the bottom of the bucket-shaped cover. After the ribbed steel bars have cooled down, the collection pipe can be opened to allow the oxide impurities to enter the collection box, while the cooling water passes through the filter holes and is discharged from the drain pipe.

[0016] Step 4: Start the roller brush equipment at the discharge position of the first water circulation tank to further clean the oxide layer on the surface of the ribbed steel bars.

[0017] Furthermore, in step two, the relative moving speed between the cooling water and the ribbed steel bars is 25 m / s.

[0018] The technical effects achieved by this invention are as follows:

[0019] The water-cooled pipe of this invention features an internal spiral liner that supports the ribbed steel bars in the middle of the pipe, ensuring complete contact between the cooling water and the surface of the steel bars. This improves the uniformity and efficiency of cooling, thereby enhancing the overall cooling effect. The included collection box allows the cooling water to remove oxide impurities from the steel bars' surface during relative movement. The water then enters a funnel-shaped hood, where a filter is installed to allow the cooling water to pass through before draining out through the drain pipe. Oxidized impurities fall to the bottom of the funnel-shaped hood. After cooling the steel bars, the sealing disc can be opened to collect the oxide impurities in the collection box, effectively preventing blockages in the water-cooled pipe and ensuring normal equipment operation. Attached Figure Description

[0020] Figure 1 This is a frontal three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 This is a side-view three-dimensional structural schematic diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure cut from the main view in this invention;

[0023] Figure 4 In this invention Figure 1 Enlarged structural diagram of region A in the middle;

[0024] Figure 5 In this invention Figure 3 Enlarged structural diagram of region B in the middle;

[0025] Figure 6 In this invention Figure 3 A magnified structural diagram of region C in the middle.

[0026] The attached diagram lists the components represented by each number as follows:

[0027] 1. Base plate; 2. Mounting base; 3. First water circulation tank; 4. Water-cooled pipe; 5. Mounting bracket; 6. Second water circulation tank; 7. Connecting pipe; 8. Spiral liner; 9. Ball groove; 10. Ball block; 11. Connecting sleeve; 12. Bucket-shaped cover; 13. Filter hole; 14. Collection box; 15. Collection pipe; 16. Sealing groove; 17. Connecting ear plate; 18. First rotating shaft; 19. Sealing disc; 20. Worm gear; 21. Fixing ear; 22. Second rotating shaft; 23. Worm; 24. Water inlet pipe; 25. Drain pipe. Detailed Implementation

[0028] To make the objectives and advantages of this invention clearer, the invention will be specifically described below with reference to embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of the invention and does not strictly limit the scope of protection specifically claimed by the invention.

[0029] like Figure 1 , 2 As shown in Figures 3 and 6, a controlled cooling device for hot-rolled ribbed steel bars includes a base plate 1. A mounting base 2 is fixed to the top of the base plate 1. A first water circulation tank 3 is slidably mounted on the top of the mounting base 2. Moving the first water circulation tank 3 allows for easy disassembly of the water-cooling pipe 4 between the first water circulation tank 3 and the second water circulation tank 6. A mounting bracket 5 is fixed to the top of the base plate 1 and to one side of the mounting base 2. A second water circulation tank 6 is fixed to one side of the mounting bracket 5. A detachable water-cooling pipe 4 is provided between the first water circulation tank 3 and the second water circulation tank 6. The inner wall of the water-cooling pipe 4 is provided with a spiral liner 8, which allows the ribbed steel bars to suspend on the spiral liner 8 within the water-cooling pipe 4, effectively solving the cooling problem of hot-rolled ribbed steel bars. To address the uneven cooling temperature phenomenon in the controlled rolling and cooling process of ribbed steel bars, multiple ball grooves 9 are provided on the outer wall of the spiral liner 8. Ball blocks 10 are rolled inside the ball grooves 9 to facilitate the movement of the ribbed steel bars and effectively reduce the wear of the ribbed steel bars. A detachable collection pipe 15 is provided at the bottom of the second water circulation tank 6. A collection box 14 is connected through the bottom of the collection pipe 15 to facilitate the collection of oxide impurities on the surface of the ribbed steel bars. Connecting ear plates 17 are fixed on both sides of the collection box 14 and are fixed to the outer wall of the second water circulation tank 6 by bolts. A water inlet pipe 24 is fixed through one side of the first water circulation tank 3 and a drain pipe 25 is fixed through one side of the second water circulation tank 6.

[0030] like Figure 3 and 5As shown, a funnel-shaped cover 12 is installed on the inner wall of the second water circulation tank 6 and below the water cooling pipe 4. Multiple filter holes 13 are provided through the outer wall of the funnel-shaped cover 12 to facilitate the collection and filtration of oxidized impurities, which is quite effective. A sealing groove 16 is provided through the bottom of the second water circulation tank 6 corresponding to the funnel-shaped cover 12, and a collection pipe 15 is inserted into the inside of the sealing groove 16. A flow-blocking component is provided at the bottom of the collection pipe 15. The flow-blocking component includes a first rotating shaft 18 rotatably mounted on the inner wall of the collection pipe 15 near the sealing groove 16. A sealing disc 19 is fixed to the outer wall of the first rotating shaft 18, and a sealing disc 19 is provided at the top of the sealing disc 19. It has a rubber sealing ring. One end of the first rotating shaft 18 extends to the outside of the collection tube 15 and is equipped with a worm gear 20. The top of the collection box 14 is fixed with two fixing ears 21. A second rotating shaft 22 is rotatably installed between the outer walls of the two fixing ears 21. The outer wall of the second rotating shaft 22 is provided with a worm 23 that meshes with the worm gear 20. By rotating the second rotating shaft 22, the second rotating shaft 22 drives the worm 23 to rotate, the worm 23 drives the worm gear 20 to rotate, and the worm gear 20 drives the sealing disc 19 on the first rotating shaft 18 to rotate, which facilitates the opening and closing of the collection tube 15, thereby facilitating the treatment of oxidized impurities in the collection box 14.

[0031] like Figure 3 and 5 As shown, the other end of the first rotating shaft 18 passes through the outer wall of the collection tube 15 and is fixed with a limiting rod. The outer wall of the collection tube 15 is provided with two limiting blocks corresponding to the limiting rod, and the two limiting blocks are arranged at ninety degrees with the first rotating shaft 18 as the center, which facilitates limiting the rotation of the sealing disc 19 and makes it convenient for the staff to accurately open or close the collection tube 15.

[0032] like Figure 1-3 As shown, both ends of the water-cooled pipe 4 are sealed and rotatably installed with connecting pipes 7. The outer walls of the first water circulation tank 3 and the second water circulation tank 6 are provided with connecting holes corresponding to the connecting pipes 7, and the connecting pipes 7 are threadedly connected to the connecting holes, which facilitates the installation and disassembly of the water-cooled pipe 4 and is quite practical.

[0033] like Figure 1-3 As shown, a connecting sleeve 11 is provided on the other side of both the first water circulation tank 3 and the second water circulation tank 6. A deformation sealing ring is provided on the inner wall of the connecting sleeve 11, and a clamp is provided on the outer wall of the connecting sleeve 11. The clamp clamps clamp the channel, thereby clamping the deformation sealing ring, so that the deformation sealing ring reliably seals with the surface of the ribbed steel bar, thereby forming a closed pipeline with the first water circulation tank 3, the water cooling pipe 4, and the second water circulation tank 6.

[0034] A method for controlled cooling of hot-rolled ribbed steel bars includes the following steps:

[0035] Step 1: The ribbed steel bars exported from the hot rolling mill are exported into the atomization channel, and the atomization extrusion equipment is started to perform atomization cooling and extrusion on the surface of the ribbed steel bars.

[0036] Step two: A second water circulation box 6 is installed at the outlet of the atomization channel, so that the atomized and cooled ribbed steel bars are introduced into the second water circulation box 6 and then into the water cooling pipe 4. At the same time, the external cooling water inlet pipe 24 enters and exits from the drain pipe 25. The cooling water flows in the opposite direction to the ribbed steel bars, washing away the oxide impurities on the surface of the ribbed steel bars. At the same time, a cooling water channel is formed in the water cooling pipe 4 to cool the ribbed steel bars. The relative movement speed between the cooling water and the ribbed steel bars is 25m / s.

[0037] Step 3: In step 2, the oxide impurities washed away from the ribbed steel bars enter the bottom of the bucket-shaped cover 12. After the ribbed steel bars have cooled down, the collection pipe 15 can be opened to allow the oxide impurities to enter the collection box 14. At the same time, the cooling water passes through the filter hole 13 and is discharged from the drain pipe 25.

[0038] Step 4: Start the roller brush equipment at the discharge position of the first water circulation tank 3 to further clean the oxide layer on the surface of the ribbed steel bars.

[0039] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention are implemented according to conventional methods in the art unless otherwise specified or limited.

Claims

1. A controlled cooling device for hot-rolled ribbed steel bars, comprising a base plate (1), characterized in that: A mounting base (2) is fixed to the top of the base plate (1). A first water circulation tank (3) is slidably mounted on the top of the mounting base (2). A mounting bracket (5) is fixed to the top of the base plate (1) and to one side of the mounting base (2). A second water circulation tank (6) is fixed to one side of the mounting bracket (5). A detachable water-cooling pipe (4) is provided between the first water circulation tank (3) and the second water circulation tank (6). The inner wall of the water-cooling pipe (4) is provided with a spiral liner (8). The outer wall of the spiral liner (8) is provided with multiple ball grooves (9). The ball groove (9) is equipped with a ball block (10) that rolls inside. The bottom of the second water circulation tank (6) is provided with a detachable collection pipe (15). The bottom of the collection pipe (15) is connected to a collection box (14). Both sides of the collection box (14) are fixed with connecting ear plates (17), and the connecting ear plates (17) are fixed to the outer wall of the second water circulation tank (6) by bolts. The first water circulation tank (3) is fixed with an inlet pipe (24) on one side, and the second water circulation tank (6) is fixed with a drain pipe (25) on one side.

2. The controlled cooling device for hot-rolled ribbed steel bars according to claim 1, characterized in that: A funnel-shaped cover (12) is provided on the inner wall of the second water circulation tank (6) and below the water cooling pipe (4). A plurality of filter holes (13) are provided through the outer wall of the funnel-shaped cover (12). A sealing groove (16) is provided through the bottom of the second water circulation tank (6) corresponding to the funnel-shaped cover (12). A collection pipe (15) is inserted into the inside of the sealing groove (16). A flow-blocking component is provided at the bottom of the collection pipe (15).

3. The controlled cooling device for hot-rolled ribbed steel bars according to claim 2, characterized in that: The flow-blocking assembly includes a first rotating shaft (18) rotatably mounted on the inner wall of the collecting pipe (15) near the sealing groove (16). A sealing disc (19) is fixed on the outer wall of the first rotating shaft (18). A rubber sealing ring is provided on the top of the sealing disc (19). One end of the first rotating shaft (18) extends to the outside of the collecting pipe (15) and is provided with a worm gear (20). Two fixing ears (21) are fixed on the top of the collecting box (14). A second rotating shaft (22) is rotatably mounted between the outer walls of the two fixing ears (21). A worm (23) that meshes with the worm gear (20) is provided on the outer wall of the second rotating shaft (22).

4. The controlled cooling device for hot-rolled ribbed steel bars according to claim 3, characterized in that: The other end of the first rotating shaft (18) passes through the outer wall of the collecting tube (15) and is fixed with a limiting rod. The outer wall of the collecting tube (15) is provided with two limiting blocks corresponding to the limiting rod, and the two limiting blocks are arranged at ninety degrees with the first rotating shaft (18) as the center.

5. The controlled cooling device for hot-rolled ribbed steel bars according to claim 1, characterized in that: Both ends of the water-cooled pipe (4) are sealed and rotatably installed with connecting pipes (7). The outer walls of the first water circulation tank (3) and the second water circulation tank (6) are provided with connecting holes corresponding to the connecting pipes (7), and the connecting pipes (7) are threadedly connected to the connecting holes.

6. The controlled cooling device for hot-rolled ribbed steel bars according to claim 1, characterized in that: A connecting sleeve (11) is provided on the other side of both the first water circulation tank (3) and the second water circulation tank (6). A deformable sealing ring is provided on the inner wall of the connecting sleeve (11), and a clamp is provided on the outer wall of the connecting sleeve (11).

7. A controlled cooling method for hot-rolled ribbed steel bars, comprising a controlled cooling device for hot-rolled ribbed steel bars according to any one of claims 1-6, characterized in that: Includes the following steps: Step 1: The ribbed steel bars exported from the hot rolling mill are exported into the atomization channel, and the atomization extrusion equipment is started to perform atomization cooling and extrusion on the surface of the ribbed steel bars. Step 2: A second water circulation box (6) is set at the outlet of the atomization channel so that the atomized and cooled ribbed steel bars are introduced into the second water circulation box (6) and enter the water cooling pipe (4) along the second water circulation box (6). At the same time, the external cooling water inlet pipe (24) enters and is discharged from the drain pipe (25). The flow direction of the cooling water moves in the opposite direction to the ribbed steel bars, washing away the oxide impurities on the surface of the ribbed steel bars. At the same time, a cooling water channel is formed in the water cooling pipe (4) to cool the ribbed steel bars. Step 3: In step 2, the oxide impurities washed away from the ribbed steel bars enter the bottom of the bucket-shaped cover (12). After the ribbed steel bars have cooled down, the collection pipe (15) can be opened to allow the oxide impurities to enter the collection box (14). At the same time, the cooling water passes through the filter hole (13) and is discharged from the drain pipe (25). Step 4: Start the roller brush equipment at the discharge position of the first water circulation tank (3) to further clean the oxide layer on the surface of the ribbed steel bars.

8. The controlled cooling method for hot-rolled ribbed steel bars according to claim 7, characterized in that: In step two, the relative moving speed between the cooling water and the ribbed steel bars is 25 m / s.

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