Hot-rolled coiled plate production line

Abstract

The utility model relates to the technical field of hot-rolled coil production, in particular to a hot-rolled coil production line. According to the technical scheme, the device comprises a base and a hot-rolled coiled plate, a heating furnace, a hot rolling mill, a cooling tank and a rolling frame are fixedly installed on the upper surface of the base, a partition plate is fixedly installed in the cooling tank, and a cooling chamber and a drying chamber are arranged in the cooling tank and located on the two sides of the partition plate correspondingly; upper guide rollers are symmetrically and rotationally installed at the positions, close to the two sides of the upper surface, in the cooling chamber, lower guide rollers are symmetrically and rotationally installed at the positions, close to the two sides of the lower surface, in the cooling chamber, a drying cover is fixedly installed in the drying chamber, and an air cooler and a circulating water pump are fixedly installed on the rear surface of the cooling tank; and the tail end of the air cooler output pipe is fixedly connected with a heat exchange pipe. According to the utility model, the consumption of cooling water is reduced in the hot-rolled coil plate cooling process, water resources are saved, and meanwhile, the water-cooled hot-rolled coil plate is dried by using the cooling heat of the hot-rolled coil plate, so that the energy consumption is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot-rolled coil production, in particular to a hot-rolled coil production line. Background Art

[0002] Hot rolled coil refers to the plate that has not been flattened by the flattening machine after hot rolling. Hot rolled coil is made of slab (mainly continuous casting slab) as raw material, and is made into strip steel by rough rolling unit and finishing rolling unit after heating. The hot steel strip coming out of the last rolling mill of finishing rolling is cooled to the set temperature and rolled into steel strip by the coiler. The cooled steel strip is processed into steel plate, flat coil and longitudinally cut steel strip products through different finishing lines (flattening, straightening, cross cutting or longitudinal cutting, inspection, weighing, packaging and marking, etc.) according to the different needs of users.

[0003] At present, the hot rolled coil is cooled by cooling water in the cooling process before coiling. The required amount of cooling water is large, resulting in serious waste of water resources. At the same time, the surface of the hot rolled coil after water cooling also needs to be dried. For this reason, we propose a hot rolled coil production line. Utility Model Content

[0004] The utility model aims to provide a hot-rolled coil production line, which has the advantages of reducing the amount of cooling water in the cooling process of the hot-rolled coil, saving water resources, and utilizing the cooling heat of the hot-rolled coil to dry the water-cooled hot-rolled coil, thereby saving energy consumption. The utility model solves the problem that the hot-rolled coil is cooled by cooling water in the cooling process before coiling, and a large amount of cooling water is required, resulting in serious waste of water resources, and the surface of the water-cooled hot-rolled coil also needs to be dried.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hot-rolled coil production line, comprising a base and a hot-rolled coil, a heating furnace, a hot rolling mill, a cooling trough and a winding rack are fixedly installed on the upper surface of the base, a partition is fixedly installed inside the cooling trough, a cooling chamber and a drying chamber are respectively arranged at positions on both sides of the partition inside the cooling trough, upper guide rollers are symmetrically rotatably installed at positions near both sides of the upper surface inside the cooling chamber, lower guide rollers are symmetrically rotatably installed at positions near both sides of the lower surface inside the cooling chamber, a drying hood is fixedly installed inside the drying chamber, an air cooler and a circulating water pump are fixedly installed on the rear surface of the cooling trough, a heat exchange pipe is fixedly connected to the end of the air cooler output pipe, the heat exchange pipe is located inside the cooling chamber, and the end of the heat exchange pipe is connected to the drying hood.

[0006] Preferably, a rubber scraper is fixedly mounted on one side of the outer surface of the partition close to the cooling chamber, and a through hole is provided on the outer surface of the rubber scraper, and the hot-rolled coil passes through the through hole.

[0007] Preferably, the end of the heat exchange tube is fixedly connected to a three-way pipe, the outer surface of the three-way pipe is fixedly connected to a connecting valve on one side close to the drying hood, the end of the connecting valve is fixedly connected to a connecting pipe, and the end of the connecting pipe is fixedly connected to the outer surface of the drying hood, and the lower surface of the three-way pipe is fixedly connected to a discharge valve.

[0008] Preferably, a dust filter is fixedly installed at the input end of the air cooler.

[0009] Preferably, a winding shaft is rotatably mounted on the front surface of the winding frame, a winding motor is fixedly mounted on the rear surface of the winding frame, and the end of the winding motor output shaft is fixedly connected to an end of the winding shaft close to the winding motor.

[0010] Preferably, brush rollers are symmetrically installed in the middle of the cooling chamber, located above and below the hot-rolled coil, and transmission gears are fixedly installed on one end of the two brush rollers close to the front surface of the cooling trough, and the two transmission gears are meshed with each other. A rotating motor is fixedly installed on the rear surface of the cooling trough, and the end of the rotating motor output shaft is fixedly connected to one end of the brush roller close to the rear surface of the cooling trough.

[0011] Preferably, a gear cover is fixedly mounted on the front surface of the cooling groove, and the two transmission gears are both located inside the gear cover.

[0012] Preferably, a filter valve is fixedly connected to the end of the circulating water pump input pipe, and the end of the filter valve and the end of the circulating water pump output pipe are respectively fixedly connected to the rear surface of the cooling tank near the two sides of the cooling chamber.

[0013] Preferably, a display screen is fixedly mounted on the rear surface of the cooling groove, a water supply valve is fixedly connected to the rear surface of the cooling groove, and a temperature sensor and a liquid level sensor are fixedly mounted on the bottom of the inner wall of the cooling chamber.

[0014] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0015] 1. The utility model achieves the effect of reducing the amount of cooling water in the cooling process of hot-rolled coils and saving water resources by arranging a base, a heating furnace, a hot rolling mill, a cooling trough, a winding rack, a partition, a cooling chamber, a drying chamber, an upper guide roller, a lower guide roller, a heat exchange tube, a cold air blower and a drying hood. At the same time, the cooling heat of the hot-rolled coils is used to dry the water-cooled hot-rolled coils, thereby saving energy consumption. The hot-rolled coil raw materials enter the heating furnace for heating and then enter the hot rolling mill for hot rolling. The rolled hot-rolled coils enter and pass through the cooling trough. Under the action of the upper guide roller and the lower guide roller, the hot-rolled coils located in the cooling chamber are formed into a U shape and are cooled by contact with the cooling water. The cold air blower works to allow cold air to enter the heat exchange tubes. The cold air in the heat exchange tubes exchanges heat with the cooling water, takes away heat and heats up. The hot air enters the drying hood to dry the water-cooled hot-rolled coils, and the dried hot-rolled coils are wound up by the winding rack.

[0016] 2. The utility model achieves the effect of improving the drying efficiency of the hot-rolled coil after water cooling through the rubber scraper and the through-hole. The hot-rolled coil after water cooling passes through the through-hole, and most of the cooling water on its surface is scraped off by the rubber scraper, which facilitates subsequent drying.

[0017] 3. The utility model achieves the effect of removing the debris remaining on the surface of the hot-rolled coil by arranging a brush roller, a transmission gear and a rotating motor. The rotating motor drives one of the brush rollers to rotate, and the two brush rollers are driven by meshing transmission gears. The two brush rollers rotate synchronously towards each other and remove the debris remaining on the surface of the hot-rolled coil.

[0018] 4. The utility model achieves the effect of uniform distribution of the water temperature of the cooling water in the cooling chamber, uniform cooling of the hot-rolled coil, and removal of debris in the cooling chamber by arranging a circulation motor and a filter valve. The circulation water pump sucks the cooling water on one side of the cooling chamber and discharges it from the other side of the cooling chamber, thereby causing the cooling water in the cooling chamber to flow, resulting in uneven temperature distribution of the cooling water in the cooling chamber. At the same time, the debris in the cooling water is filtered out through the filter valve during the circulation process.

[0019] 5. The utility model achieves the effect of controlling the internal water temperature of the cooling water by arranging a temperature sensor, a three-way pipe, a discharge valve, and a connecting pipe. The water temperature of the cooling water inside the cooling chamber is monitored according to the temperature sensor. When the water temperature rises, the operating frequency of the air cooler is adjusted to control the flow of external cooling air entering the heat exchange pipe. At the same time, by controlling the opening of the connecting valve and the discharge valve, the flow of hot air entering the drying hood is controlled to avoid the hot-rolled coil being heated to a high temperature, which is not conducive to coiling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0021] Figure 2 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0022] Figure 3 This is a partial side sectional structural diagram of the gear cover of the utility model;

[0023] Figure 4 This is a rear view structural diagram of the utility model;

[0024] Figure 5 For this utility model Figure 4 Schematic diagram of the enlarged structure of A.

[0025] 1. Cooling trough; 2. Base; 3. Heating furnace; 4. Hot rolling mill; 5. Cooling chamber; 6. Rubber scraper; 7. Through-hole; 8. Partition; 9. Drying chamber; 10. Winding motor; 11. Winding rack; 12. Winding shaft; 13. Hot rolled coil; 14. Gear cover; 15. Upper guide roller; 16. Brush roller; 17. Drying cover; 18. Lower guide roller; 19. Temperature sensor; 20. Liquid level sensor; 21. Heat exchange tube; 22. Transmission gear; 23. Display screen; 24. Connecting pipe; 25. Water supply valve; 26. Filter valve; 27. Rotating motor; 28. Circulating water pump; 29. ​​Air cooler; 30. Dust filter; 31. Connecting valve; 32. Three-way pipe; 33. Discharge valve. DETAILED DESCRIPTION

[0026] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] Embodiment 1

[0028] like Figure 1-Figure 5As shown, a hot-rolled coil production line proposed by the utility model comprises a base 2 and a hot-rolled coil 13, a heating furnace 3, a hot rolling mill 4, a cooling tank 1 and a coiling frame 11 are fixedly installed on the upper surface of the base 2, the heating furnace 3, the hot rolling mill 4, the cooling tank 1 and the coiling frame 11 are sequentially distributed from left to right on the base 2, a partition 8 is fixedly installed inside the cooling tank 1, a cooling chamber 5 and a drying chamber 9 are respectively arranged at both sides of the partition 8 inside the cooling tank 1, the cooling chamber 5 is close to the hot rolling mill 4, a rubber scraper 6 is fixedly installed on the outer surface of the partition 8 close to the cooling chamber 5, and the outer surface of the rubber scraper 6 is provided with The hot rolled coil 13 passes through the through-hole 7, and the hot rolled coil 13 after water cooling in the cooling chamber 5 passes through the through-hole 7, and most of the cooling water on its surface is scraped off by the rubber scraper 6, which is convenient for subsequent drying. Upper guide rollers 15 are symmetrically installed at both sides of the upper surface of the cooling chamber 5, and lower guide rollers 18 are symmetrically installed at both sides of the lower surface of the cooling chamber 5. A drying hood 17 is fixedly installed in the drying chamber 9, and a cooling fan 29 and a circulating water pump 28 are fixedly installed on the rear surface of the cooling tank 1. The end of the output pipe of the cooling fan 29 is fixedly connected to a heat exchange pipe 21 The heat exchange tube 21 is located inside the cooling chamber 5, and the end of the heat exchange tube 21 is connected to the drying hood 17. A dust filter 30 is fixedly installed at the input end of the air cooler 29. The outside air passes through the dust filter 30 to filter out dust impurities in the air before entering the air cooler 29 to avoid clogging of the heat exchange tube 21. A three-way pipe 32 is fixedly connected to the end of the heat exchange tube 21. A connecting valve 31 is fixedly connected to the side of the outer surface of the three-way pipe 32 close to the drying hood 17. The end of the connecting valve 31 is fixedly connected to the connecting pipe 24, and the end of the connecting pipe 24 is fixedly connected to the outer surface of the drying hood 17. The lower surface of the three-way pipe 32 A discharge valve 33 is fixedly connected. When the temperature of cooling water in the cooling chamber 5 rises, the operating frequency of the air cooler 29 is adjusted to control the flow of external cooling air entering the heat exchange tube 21. At the same time, the flow of hot air entering the drying hood 17 is controlled by controlling the opening of the connecting valve 31 and the discharge valve 33 to avoid the hot-rolled coil 13 being heated to a high temperature, which is not conducive to winding. A winding shaft 12 is rotatably installed on the front surface of the winding frame 11, and a winding motor 10 is fixedly installed on the rear surface of the winding frame 11. The end of the output shaft of the winding motor 10 is fixedly connected to the end of the winding shaft 12 close to the winding motor 10.

[0029] When the utility model is in use, the raw material of the hot-rolled coil 13 enters the heating furnace 3 for heating and then enters the hot rolling mill 4 for hot rolling. The rolled hot-rolled coil 13 enters and passes through the cooling trough 1. Under the action of the upper guide roller 15 and the lower guide roller 18, the hot-rolled coil 13 located in the cooling chamber 5 is formed into a U shape and is cooled by contact with cooling water. The air cooler 29 works to allow cold air to enter the heat exchange tube 21. The cold air in the heat exchange tube 21 exchanges heat with the cooling water, takes away the heat and heats up. The hot air enters the drying hood 17 to dry the water-cooled hot-rolled coil 13. The dried hot-rolled coil 13 is rolled up by the winding rack 11.

[0030] Embodiment 2

[0031] like Figure 1 , Figure 2 , Figure 3 ,and Figure 4 As shown, a hot-rolled coil production line proposed by the utility model, compared with the first embodiment, this embodiment also includes brush rollers 16 symmetrically rotatably installed at the middle of the cooling chamber 5 above and below the hot-rolled coil 13, two brush rollers 16 are fixedly installed with transmission gears 22 at one end close to the front surface of the cooling tank 1, and the two transmission gears 22 are meshed with each other, a rotating motor 27 is fixedly installed on the rear surface of the cooling tank 1, the end of the output shaft of the rotating motor 27 is fixedly connected to one end of the brush roller 16 close to the rear surface of the cooling tank 1, a gear cover 14 is fixedly installed on the front surface of the cooling tank 1, and the two transmission gears 22 are both located inside the gear cover 14, the gear cover 14 is used to protect the transmission gears 22, and also to avoid mechanical damage caused by the rotating transmission gears 22.

[0032] In this embodiment, the rotating motor 27 drives one of the brush rollers 16 to rotate, and the two brush rollers 16 are driven by the meshing transmission gears 22, so that the two brush rollers 16 rotate synchronously towards each other and remove the debris remaining on the surface of the hot-rolled coil 13.

[0033] Embodiment 3

[0034] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, a hot-rolled coil production line proposed by the utility model, compared with the first embodiment, this embodiment also includes a filter valve 26 fixedly connected to the end of the input pipe of the circulating water pump 28, the end of the filter valve 26 and the end of the output pipe of the circulating water pump 28 are respectively fixedly connected to the rear surface of the cooling tank 1 near the two sides of the cooling chamber 5, a display screen 23 is fixedly installed on the rear surface of the cooling tank 1, a water replenishment valve 25 is fixedly connected to the rear surface of the cooling tank 1, and a temperature sensor 19 and a liquid level sensor 20 are fixedly installed on the bottom of the inner wall of the cooling chamber 5, and the water temperature and water level of the cooling water in the cooling chamber 5 are monitored by the liquid level sensor 20 and the temperature sensor 19, and displayed on the display screen 23.

[0035] In this embodiment, the circulating water pump 28 sucks the cooling water from one side of the cooling chamber 5 and discharges it from the other side of the cooling chamber 5, so that the cooling water inside the cooling chamber 5 flows, making the temperature of the cooling water inside the cooling chamber 5 uneven, which is beneficial to the uniform cooling of the hot-rolled coil 13. At the same time, the cooling water is filtered out of debris through the filter valve 26 during the circulation process.

[0036] The above-mentioned specific embodiments are only several preferred embodiments of the present invention. Based on the technical solution of the present invention and the relevant inspiration of the above-mentioned embodiments, those skilled in the art can make various alternative improvements and combinations to the above-mentioned specific embodiments.

Claims

1. A hot rolled coil production line, comprising a base (2) and a hot rolled coil (13), characterized in that: A heating furnace (3), a hot rolling mill (4), a cooling trough (1) and a winding frame (11) are fixedly mounted on the upper surface of the base (2); a partition (8) is fixedly mounted inside the cooling trough (1); a cooling chamber (5) and a drying chamber (9) are respectively arranged at positions on both sides of the partition (8) inside the cooling trough (1); upper guide rollers (15) are symmetrically mounted on positions near both sides of the upper surface inside the cooling chamber (5); lower guide rollers (18) are symmetrically mounted on positions near both sides of the lower surface inside the cooling chamber (5); a drying hood (17) is fixedly mounted inside the drying chamber (9); a cooling fan (29) and a circulating water pump (28) are fixedly mounted on the rear surface of the cooling trough (1); a heat exchange pipe (21) is fixedly connected to the end of the output pipe of the cooling fan (29); the heat exchange pipe (21) is located inside the cooling chamber (5), and the end of the heat exchange pipe (21) is connected to the drying hood (17).

2. A hot rolled coil production line according to claim 1, characterized in that: A rubber scraper (6) is fixedly mounted on one side of the outer surface of the partition (8) close to the cooling chamber (5), and a through-hole (7) is provided on the outer surface of the rubber scraper (6), and the hot-rolled coil (13) passes through the through-hole (7).

3. The hot rolled coil production line according to claim 1, characterized in that: The end of the heat exchange tube (21) is fixedly connected to a three-way pipe (32); a side of the outer surface of the three-way pipe (32) close to the drying hood (17) is fixedly connected to a connecting valve (31); the end of the connecting valve (31) is fixedly connected to a connecting pipe (24); and the end of the connecting pipe (24) is fixedly connected to the outer surface of the drying hood (17); and a discharge valve (33) is fixedly connected to the lower surface of the three-way pipe (32).

4. The hot rolled coil production line according to claim 1, characterized in that: A dust filter (30) is fixedly mounted on the input end of the cooling fan (29).

5. The hot rolled coil production line according to claim 1, characterized in that: A winding shaft (12) is rotatably mounted on the front surface of the winding frame (11), a winding motor (10) is fixedly mounted on the rear surface of the winding frame (11), and the end of the output shaft of the winding motor (10) and an end of the winding shaft (12) close to the winding motor (10) are fixedly connected.

6. The hot rolled coil production line according to claim 1, characterized in that: Brush rollers (16) are symmetrically mounted in the middle of the cooling chamber (5) at positions above and below the hot-rolled coil (13), and transmission gears (22) are fixedly mounted on one end of the two brush rollers (16) close to the front surface of the cooling trough (1), and the two transmission gears (22) are meshed with each other. A rotating motor (27) is fixedly mounted on the rear surface of the cooling trough (1), and the end of the output shaft of the rotating motor (27) is fixedly connected to one end of the brush roller (16) close to the rear surface of the cooling trough (1).

7. The hot rolled coil production line according to claim 6, characterized in that: A gear cover (14) is fixedly mounted on the front surface of the cooling tank (1), and the two transmission gears (22) are both located inside the gear cover (14).

8. The hot rolled coil production line according to claim 1, characterized in that: The end of the input pipe of the circulating water pump (28) is fixedly connected to a filter valve (26), and the end of the filter valve (26) and the end of the output pipe of the circulating water pump (28) are respectively fixedly connected to the rear surface of the cooling tank (1) near the two sides of the cooling chamber (5).

9. The hot rolled coil production line according to claim 1, characterized in that: A display screen (23) is fixedly mounted on the rear surface of the cooling trough (1), a water supply valve (25) is fixedly connected to the rear surface of the cooling trough (1), and a temperature sensor (19) and a liquid level sensor (20) are fixedly mounted on the bottom of the inner wall of the cooling chamber (5).

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