A device and process for controlled rolling and controlled cooling of threaded steel

Abstract

The application relates to the rolling technology field of threaded steel, and discloses a rolling and controlled cooling device and process for threaded steel, which solves the problem of poor cooling effect of steel at present, and comprises a closed water cooling box, a water cooling mechanism and a circulating mechanism are arranged on the closed water cooling box, support plates are fixedly connected to the bottom of the closed water cooling box, a base is fixedly connected between the bottoms of the two support plates, a rolling mechanism is arranged on the top of the base, through holes are arranged on the two sides of the closed water cooling box, the water cooling mechanism comprises a horizontal cylinder fixed in the closed water cooling box, an outer ring is fixedly sleeved on the outer side of the horizontal cylinder, a movable ring is movably arranged on the outer side of the horizontal cylinder, and a hollow ring and a ring-shaped pipe are arranged in the closed water cooling box; the position of each nozzle can be changed, when the high-pressure pump is started, the cooling water can enter the ring-shaped pipe and be sprayed from the ring-shaped groove, the cooling water can be sprayed again, and therefore the cooling effect on the steel can be improved.

Description

Technical Field

[0001] This invention belongs to the field of rebar rolling technology, specifically a controlled rolling and cooling device and process for rebar rolling. Background Technology

[0002] Rebar is an indispensable reinforcement material for reinforced concrete in civil engineering and construction. It has excellent tensile strength and bonding anchoring performance. It is mainly formed by hot rolling. In the production process of rebar, the steel billet is heated in a heating furnace and then continuously pressed and formed by multiple sets of roughing, intermediate rolling and finishing rolling mills. After the rebar is formed at high temperature, the grain structure is coarse and the internal stress is uneven, which makes it difficult to meet the strength and toughness standards of the finished product. Therefore, the industry generally adopts a controlled rolling and controlled cooling process. After the finishing rolling process, a closed water-cooling box is set up. The high-temperature rebar passes straight through the center of the water-cooling box. High-pressure cooling water is sprayed through the spray nozzles arranged inside the box to quickly and uniformly cool the high-speed moving rebar, refine the metallographic grains of the steel, optimize the internal structure, and thus improve the overall mechanical properties of the rebar.

[0003] In existing technologies, the controlled cooling water-cooled box for rebar uses a fixed-installation structure for its internal cooling nozzles. Due to slight deviations and vibrations in the rebar during rolling, the fixed nozzles cannot adapt to the steel's positional shifts in real time. This easily leads to uneven cooling in certain areas and blind spots in the spray coverage, resulting in large temperature differences in the circumferential direction of the rebar and uneven differentiation of the surface and core metallographic structures. This not only easily causes bending deformation and excessive residual stress in the rebar, but also results in substandard strength and large performance fluctuations in the finished product. This seriously affects the finished product quality and production qualification rate of the rebar, and cannot meet the requirements of high-precision, high-quality rebar rolling production. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a controlled rolling and cooling device and process for rebar rolling, which effectively solves the problem of poor cooling effect on steel.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a controlled rolling and cooling device for rebar rolling, comprising a sealed water-cooled box, wherein the sealed water-cooled box is provided with a water-cooling mechanism and a circulation mechanism, and support plates are fixedly connected to both sides of the bottom of the sealed water-cooled box, and a base is fixedly connected between the bottoms of the two support plates, and a rolling mechanism is provided on the top of the base, and through holes are provided on both sides of the sealed water-cooled box.

[0006] The water-cooling mechanism includes a horizontal cylinder fixed inside a sealed water-cooling box. An outer ring is fixedly sleeved on the outside of the horizontal cylinder, and a movable ring is movably provided on the outside of the horizontal cylinder. The sealed water-cooling box contains a hollow ring and an annular tube. Multiple nozzles are provided at equal angles on the inner side of the hollow ring. Multiple connecting posts are fixedly connected at equal angles between the hollow ring and the movable ring. An annular groove is provided on the inner side of the annular tube. Multiple connecting posts are fixedly connected at equal angles between the annular tube and the outer ring.

[0007] Preferably, a high-pressure pump and a water storage tank are fixedly installed on the top of the sealed water-cooled box. A water supply pipe is fixedly connected between the high-pressure pump and the water storage tank. A main pipe is fixedly connected to the high-pressure pump. A flexible hose is fixedly connected to the outside of the hollow ring. A branch pipe is fixedly connected between the flexible hose and the main pipe. A branch pipe is fixedly connected between the ring pipe and the main pipe.

[0008] Preferably, the outer ring and the sealed water-cooled box are rotatably connected at equal angles by multiple limiting rollers, each limiting roller abutting against the inner wall of the movable ring. Multiple limiting rods are fixedly connected at equal angles on both sides of the movable ring, and each limiting rod is provided with a ball bearing at the end away from the movable ring. The left and right sets of ball bearings abut against the outer ring and the sealed water-cooled box, respectively.

[0009] Preferably, the sealed water-cooled box has two slide rods fixedly connected inside, a slide plate movably connected between the two slide rods, a toothed plate fixedly connected to the bottom of the slide plate, and a gear fixedly installed on the outer side of the movable ring, the gear meshing with the toothed plate.

[0010] Preferably, a base is fixedly installed on the top of the sealed water-cooled box, a drive motor is fixedly installed on the base, a drive shaft is fixedly connected to the drive motor, the bottom end of the drive shaft extends into the sealed water-cooled box and is fixedly connected to a turntable, a drive rod is rotatably connected to the bottom of the turntable, and the end of the drive rod away from the turntable is rotatably connected to the bottom of the slide plate.

[0011] Preferably, the circulation mechanism includes a water collection box fixed to the bottom of the sealed water-cooled box, the inside of the water collection box is provided with a drawer-type filter screen, a water pump and a plate heat exchanger are fixedly installed on the top of the sealed water-cooled box, a circulation pipe is fixedly connected between the plate heat exchanger and the water tank, a connecting pipe is fixedly connected between the plate heat exchanger and the water pump, and a pumping pipe is fixedly connected between the water pump and the water collection box.

[0012] Preferably, two guide plates are symmetrically fixedly connected to the inner bottom wall of the sealed water-cooled box, and two inclined plates are symmetrically fixedly connected between the two guide plates.

[0013] Preferably, the rolling mechanism includes two vertical plates symmetrically fixed to the top of the base, a lower roller rotatably connected between the two vertical plates, a column fixedly connected to the top of each of the two vertical plates, a lifting frame movably sleeved between the two columns, and an upper roller located directly above the lower roller rotatably connected to the inner side of the lifting frame.

[0014] Preferably, a top plate is fixedly connected between the top ends of the two columns, a hydraulic push rod is fixedly installed at the bottom of the top plate, and the top of the lifting frame is fixed to the output end of the hydraulic push rod.

[0015] A controlled rolling and controlled cooling process for rebar rolling includes the following steps:

[0016] Step 1: First, start the hydraulic push rod to drive the upper roll down, thus rolling the steel.

[0017] Step 2: Then start the high-pressure pump to spray cooling water from each nozzle, and at the same time start the drive motor to drive the hollow ring to rotate back and forth to change the position of each nozzle. The high-pressure pump also causes the cooling water to spray out from the annular groove to spray the steel again.

[0018] Step 3: Finally, start the water pump to filter and cool the sprayed water again before sending it back to the water tank for recycling, thus achieving sufficient cooling of the steel.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. The present invention enables cooling water in the water tank to be sprayed out from each nozzle by starting the high-pressure pump, which facilitates the cooling of steel. The drive motor can be started to drive the hollow ring to rotate back and forth, which facilitates the change of the position of each nozzle. At the same time, when the high-pressure pump is started, cooling water can enter the annular pipe and be sprayed out from the annular groove, which facilitates the spraying of cooling water again, thereby improving the cooling effect on the steel.

[0021] 2. This invention, by setting up a guide plate and an inclined plate, allows the spray water in the sealed water-cooled box to enter the water collection box, which facilitates the filtration of the spray water through a drawer-type filter screen. Through the cooperation between the water pump and the plate heat exchanger, the spray water can be cooled and transported back to the water storage tank, thereby facilitating the recycling of cooling water.

[0022] 3. This invention can drive the upper roll to descend by activating the hydraulic push rod, and the cooperation between the upper and lower rolls facilitates the rolling of steel. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0024] In the attached diagram:

[0025] Figure 1 This is a schematic diagram of the controlled rolling and cooling device for rebar rolling according to the present invention;

[0026] Figure 2This is a schematic cross-sectional view of the sealed water-cooled box of the present invention;

[0027] Figure 3 This is a schematic diagram of the water-cooling mechanism of the present invention;

[0028] Figure 4 This is a schematic diagram of the horizontal cylinder structure of the present invention;

[0029] Figure 5 This is a schematic diagram of the skateboard structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the circulation mechanism structure of the present invention;

[0031] Figure 7 This is a schematic diagram of the rolling mechanism of the present invention.

[0032] In the diagram: 1. Sealed water-cooled box; 2. Water-cooling mechanism; 201. Horizontal cylinder; 202. Movable ring; 203. Outer ring; 204. Connecting post one; 205. Annular pipe; 206. Annular groove; 207. Connecting post two; 208. Hollow ring; 209. Nozzle; 2010. Branch pipe one; 2011. High-pressure pump; 2012. Water storage tank; 2013. Water supply pipe; 2014. Main pipe; 2015. Flexible hose; 2016. Branch pipe two; 2017. Slide plate; 2018. Limiting roller; 2019. Gear; 2020. Ball bearing; 2021. Limiting rod; 2022. Slide bar; 2023. 3. Toothed plate; 2024. Drive rod; 2025. Turntable; 2026. Drive shaft; 2027. Drive motor; 2028. Base; 3. Circulation mechanism; 301. Water collection box; 302. Water pump; 303. Water pump; 304. Connecting pipe; 305. Plate heat exchanger; 306. Circulation pipe; 307. Drawer-type filter screen; 4. Rolling mechanism; 401. Vertical plate; 402. Lower roll; 403. Upper roll; 404. Column; 405. Top plate; 406. Hydraulic push rod; 407. Lifting frame; 5. Base; 6. Support plate; 7. Through hole; 8. Guide plate; 9. Inclined plate. Detailed Implementation

[0033] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0034] Example 1, by Figures 1-7The present invention relates to a controlled rolling and cooling device for rebar rolling, comprising a sealed water-cooled box 1, a water-cooling mechanism 2 and a circulation mechanism 3 on the sealed water-cooled box 1, support plates 6 fixedly connected to both sides of the bottom of the sealed water-cooled box 1, a base 5 fixedly connected between the bottoms of the two support plates 6, a rolling mechanism 4 on the top of the base 5, and through holes 7 on both sides of the sealed water-cooled box 1.

[0035] In Embodiment 2, based on Embodiment 1, the water-cooling mechanism 2 includes a horizontal cylinder 201 fixed inside the sealed water-cooling box 1. An outer ring 203 is fixedly sleeved on the outer side of the horizontal cylinder 201, and a movable ring 202 is movably provided on the outer side of the horizontal cylinder 201. The sealed water-cooling box 1 contains a hollow ring 208 and an annular tube 205. Multiple nozzles 209 are provided at equal angles on the inner side of the hollow ring 208. Multiple connecting posts 207 are fixedly connected at equal angles between the hollow ring 208 and the movable ring 202. An annular groove 206 is provided on the inner side of the annular tube 205. Multiple connecting posts 204 are fixedly connected at equal angles between the annular tube 205 and the outer ring 203. The sealed water-cooling box 1... A high-pressure pump 2011 and a water storage tank 2012 are fixedly installed on the top. A water supply pipe 2013 is fixedly connected between the high-pressure pump 2011 and the water storage tank 2012. A main pipe 2014 is fixedly connected to the high-pressure pump 2011. A flexible hose 2015 is fixedly connected to the outside of the hollow ring 208. A branch pipe 2010 is fixedly connected between the flexible hose 2015 and the main pipe 2014. A branch pipe 2016 is fixedly connected between the annular pipe 205 and the main pipe 2014. Multiple limiting rollers 2018 are rotatably connected at equal angles between the outer ring 203 and the sealed water-cooled box 1. Each limiting roller 2018 abuts against the inner wall of the movable ring 202. Multiple limiting rods 2021 are fixedly connected at equal angles on both sides. Each limiting rod 2021 has a ball bearing 2020 at the end away from the movable ring 202. The left and right sets of ball bearings 2020 respectively abut against the outer ring 203 and the sealed water-cooled box 1. The movable ring 202 is prevented from moving longitudinally by multiple limiting rollers 2018 and from moving laterally by multiple ball bearings 2020. Since both the limiting rollers 2018 and the ball bearings 2020 can roll, the movable ring 202 can rotate. Two sliding rods 2022 are fixedly connected inside the sealed water-cooled box 1. A sliding plate 201 is movably sleeved between the two sliding rods 2022. 7. A toothed plate 2023 is fixedly connected to the bottom of the slide plate 2017. A gear 2019 is fixedly installed on the outer side of the movable ring 202. The gear 2019 meshes with the toothed plate 2023. A base 2028 is fixedly installed on the top of the sealed water-cooled box 1. A drive motor 2027 is fixedly installed on the base 2028. A drive shaft 2026 is fixedly connected to the drive motor 2027. The bottom end of the drive shaft 2026 extends into the sealed water-cooled box 1 and is fixedly connected to a turntable 2025. A drive rod 2024 is rotatably connected to the bottom of the turntable 2025. The end of the drive rod 2024 away from the turntable 2025 is rotatably connected to the bottom of the slide plate 2017.

[0036] First, the high-pressure pump 2011 is started, drawing cooling water from the water storage tank 2012 through the water pipe 2013. The cooling water then enters the hollow ring 208 through the main pipe 2014, branch pipe 2010, and hose 2015, and is sprayed out from each nozzle 209 to achieve spray cooling of the steel. At the same time, the drive motor 2027 is started, driving the drive shaft 2026 to rotate, which in turn drives the turntable 2025 to rotate. Through the drive rod 2024, the slide plate 2017 slides back and forth along the two slide rods 2022. Since the toothed plate 2023 meshes with the gear 2019, the movable ring 202 rotates back and forth, and through each connecting column 207, it drives the hollow ring 208 to rotate back and forth, thereby adjusting the position of each nozzle 209.

[0037] When the high-pressure pump 2011 starts, cooling water enters the annular pipe 205 through the main pipe 2014 and the branch pipe 2016 and is sprayed out from the annular groove 206, thus spraying the steel again and finally completing the full cooling of the steel.

[0038] In Example 3, based on Example 1, the circulation mechanism 3 includes a water collection box 301 fixed to the bottom of the sealed water-cooled box 1. The inside of the water collection box 301 is provided with a drawer-type filter screen 307. A water pump 303 and a plate heat exchanger 305 are fixedly installed on the top of the sealed water-cooled box 1. A circulation pipe 306 is fixedly connected between the plate heat exchanger 305 and the water storage tank 2012. A connecting pipe 304 is fixedly connected between the plate heat exchanger 305 and the water pump 303. A water pumping pipe 302 is fixedly connected between the water pump 303 and the water collection box 301. Two guide plates 8 are symmetrically fixedly connected on the inner bottom wall of the sealed water-cooled box 1. Two inclined plates 9 are symmetrically fixedly connected between the two guide plates 8. A drain outlet is provided at the bottom of the sealed water-cooled box 1. The cavity formed between the two guide plates 8 and the two inclined plates 9 is connected to the drain outlet. The water collection box 301 is located at the drain outlet to facilitate the water used in the sealed water-cooled box 1 to enter the water collection box 301.

[0039] After use, the spray water in the sealed water-cooled box 1 flows downward and enters the water collection box 301 through the guiding action of the guide plate 8 and the inclined plate 9. The drawer-type filter 307 in the water collection box 301 filters the spray water. Then, the water pump 303 can be started to draw the purified spray water in the water collection box 301 through the water pumping pipe 302. The spray water enters the plate heat exchanger 305 through the connecting pipe 304 for secondary cooling. The cooled water is then transported back to the water storage tank 2012 through the circulation pipe 306, thus realizing the recycling of cooling water.

[0040] In Example 4, based on Example 1, the rolling mechanism 4 includes two vertical plates 401 symmetrically fixed to the top of the base 5. A lower roller 402 is rotatably connected between the two vertical plates 401. A column 404 is fixedly connected to the top of each of the two vertical plates 401. A lifting frame 407 is movably sleeved between the two columns 404. An upper roller 403 located directly above the lower roller 402 is rotatably connected to the inner side of the lifting frame 407. A top plate 405 is fixedly connected between the top ends of the two columns 404. A hydraulic push rod 406 is fixedly installed at the bottom of the top plate 405. The top of the lifting frame 407 is fixed to the output end of the hydraulic push rod 406.

[0041] First, the hydraulic push rod 406 is activated, which drives the lifting frame 407 to slide downward along the two columns 404, and drives the upper roll 403 to descend. The steel is rolled by the lower roll 402 and the upper roll 403. At the same time, the hydraulic push rod 406 can adjust the distance between the upper roll 403 and the lower roll 402 to determine the amount of rolling per pass, thus achieving controlled rolling operation.

Claims

1. A controlled rolling and cooling device for rebar rolling, comprising a sealed water-cooled box (1), characterized in that: The sealed water-cooled box (1) is provided with a water-cooling mechanism (2) and a circulation mechanism (3). Support plates (6) are fixedly connected to both sides of the bottom of the sealed water-cooled box (1). A base (5) is fixedly connected between the bottoms of the two support plates (6). A rolling mechanism (4) is provided on the top of the base (5). Through holes (7) are opened on both sides of the sealed water-cooled box (1). The water cooling mechanism (2) includes a horizontal cylinder (201) fixed inside the sealed water cooling box (1), an outer ring (203) fixedly sleeved on the outside of the horizontal cylinder (201), a movable ring (202) movably provided on the outside of the horizontal cylinder (201), a hollow ring (208) and an annular tube (205) are provided inside the sealed water cooling box (1), a plurality of nozzles (209) are provided at equal angles on the inner side of the hollow ring (208), a plurality of connecting posts (207) are fixedly connected at equal angles between the hollow ring (208) and the movable ring (202), an annular groove (206) is provided on the inner side of the annular tube (205), and a plurality of connecting posts (204) are fixedly connected at equal angles between the annular tube (205) and the outer ring (203).

2. The controlled rolling and cooling device for rebar rolling according to claim 1, characterized in that: A high-pressure pump (2011) and a water storage tank (2012) are fixedly installed on the top of the sealed water-cooled box (1). A water supply pipe (2013) is fixedly connected between the high-pressure pump (2011) and the water storage tank (2012). A main pipe (2014) is fixedly connected to the high-pressure pump (2011). A flexible hose (2015) is fixedly connected to the outside of the hollow ring (208). A branch pipe (2010) is fixedly connected between the flexible hose (2015) and the main pipe (2014). A branch pipe (2016) is fixedly connected between the ring pipe (205) and the main pipe (2014).

3. The controlled rolling and cooling device for rebar rolling according to claim 1, characterized in that: The outer ring (203) and the sealed water-cooled box (1) are rotatably connected at equal angles by multiple limiting rollers (2018). Each limiting roller (2018) abuts against the inner wall of the movable ring (202). Multiple limiting rods (2021) are fixedly connected at equal angles on both sides of the movable ring (202). Each limiting rod (2021) is provided with a ball (2020) at the end away from the movable ring (202). The left and right sets of ball (2020) abut against the outer ring (203) and the sealed water-cooled box (1) respectively.

4. The controlled rolling and cooling device for rebar rolling according to claim 1, characterized in that: The sealed water-cooled box (1) has two slide rods (2022) fixedly connected inside. A slide plate (2017) is movably sleeved between the two slide rods (2022). A toothed plate (2023) is fixedly connected to the bottom of the slide plate (2017). A gear (2019) is fixedly installed on the outside of the movable ring (202). The gear (2019) meshes with the toothed plate (2023).

5. The controlled rolling and cooling device for rebar rolling according to claim 1, characterized in that: A base (2028) is fixedly installed on the top of the sealed water-cooled box (1). A drive motor (2027) is fixedly installed on the base (2028). A drive shaft (2026) is fixedly connected to the drive motor (2027). The bottom end of the drive shaft (2026) extends into the sealed water-cooled box (1) and is fixedly connected to a turntable (2025). A drive rod (2024) is rotatably connected to the bottom of the turntable (2025). The end of the drive rod (2024) away from the turntable (2025) is rotatably connected to the bottom of the slide plate (2017).

6. The controlled rolling and cooling device for rebar rolling according to claim 1, characterized in that: The circulation mechanism (3) includes a water collection box (301) fixed to the bottom of the sealed water-cooled box (1). The inside of the water collection box (301) is provided with a drawer-type filter screen (307). A water pump (303) and a plate heat exchanger (305) are fixedly installed on the top of the sealed water-cooled box (1). A circulation pipe (306) is fixedly connected between the plate heat exchanger (305) and the water storage tank (2012). A connecting pipe (304) is fixedly connected between the plate heat exchanger (305) and the water pump (303). A water pumping pipe (302) is fixedly connected between the water pump (303) and the water collection box (301).

7. The controlled rolling and cooling device for rebar rolling according to claim 1, characterized in that: Two guide plates (8) are symmetrically fixedly connected to the inner bottom wall of the sealed water-cooled box (1), and two inclined plates (9) are symmetrically fixedly connected between the two guide plates (8).

8. The controlled rolling and cooling device for rebar rolling according to claim 1, characterized in that: The rolling mechanism (4) includes two vertical plates (401) symmetrically fixed to the top of the base (5). A lower roller (402) is rotatably connected between the two vertical plates (401). A column (404) is fixedly connected to the top of each of the two vertical plates (401). A lifting frame (407) is movably sleeved between the two columns (404). An upper roller (403) located directly above the lower roller (402) is rotatably connected to the inner side of the lifting frame (407).

9. A controlled rolling and cooling device for rebar rolling according to claim 8, characterized in that: A top plate (405) is fixedly connected between the top ends of the two columns (404), and a hydraulic push rod (406) is fixedly installed at the bottom of the top plate (405). The top of the lifting frame (407) is fixed to the output end of the hydraulic push rod (406).

10. A controlled rolling and controlled cooling process for rebar rolling as described in any one of claims 1-9, characterized in that, Includes the following steps: Step 1: First, start the hydraulic push rod (406) to drive the upper roll (403) down to achieve rolling of the steel; Step 2: Then start the high-pressure pump (2011) to spray cooling water from each nozzle (209), and at the same time start the drive motor (2027) to drive the hollow ring (208) to rotate back and forth to change the position of each nozzle (209), and the high-pressure pump (2011) to spray cooling water from the annular groove (206) to spray the steel again; Step 3: Finally, start the water pump (303) to filter and cool the sprayed water again before sending it back to the water storage tank (2012) for recycling, so as to achieve full cooling of the steel.

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