Hot rolling device for stainless steel coiled plate

Abstract

The utility model relates to the technical field of hot rolling, in particular to a stainless steel coiled plate hot rolling device. According to the technical scheme, the hot rolling device comprises a hot rolling box, a preheating pipe and a cooling pipe are fixedly installed on the two sides of the outer surface of the hot rolling box respectively, air outlet gaps are symmetrically formed in the upper surface and the lower surface of the preheating pipe, air inlet gaps are symmetrically formed in the upper surface and the lower surface of the cooling pipe, and an induced draft fan is fixedly connected to the upper surface of the hot rolling box; the tail end of an input pipe of the induced draft fan is fixedly connected with the front surface of a cooling pipe, and the tail end of an output pipe of the induced draft fan is fixedly connected with a connecting air pipe. The device can recycle residual heat on the hot-rolled stainless steel coil plate, so that the hot-rolled stainless steel coil plate is preheated while the hot-rolled stainless steel coil plate is rapidly cooled, energy consumption is reduced, chippings and impurities adhered to the surface of the hot-rolled stainless steel coil plate are removed, influence on subsequent hot rolling is avoided, and the service life of the hot-rolled stainless steel coil plate is prolonged. The hot-rolling precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of hot rolling technology, specifically to a hot rolling device for stainless steel coils. Background Technology

[0002] Hot-rolled stainless steel coils refer to stainless steel coils produced through a hot rolling process. The principle is to heat the slab to a high temperature and then roll it through roughing and finishing mills to finally roll it into a steel strip coil. Hot-rolled stainless steel plates are generally thin plates with a thickness of no more than 3mm, and thick plates with a thickness greater than 3mm.

[0003] Currently, stainless steel coils need to be cooled after hot rolling, and the heat released during the cooling process will cause a lot of heat energy waste. At the same time, the debris and impurities adhering to the surface of the stainless steel sheet before hot rolling will also have an adverse effect on hot rolling and reduce the accuracy of hot rolling. To address this, we propose a hot rolling device for stainless steel coils. Utility Model Content

[0004] The purpose of this invention is to provide a stainless steel coil hot rolling device that can recover and utilize the residual heat on the stainless steel coil after hot rolling, allowing the stainless steel coil to cool rapidly after hot rolling while preheating the stainless steel coil to be hot rolled, thereby reducing energy consumption. At the same time, it removes the debris and impurities adhering to the surface of the steel plate to be hot rolled, avoiding any impact on subsequent hot rolling and improving the hot rolling precision. This invention solves the current problems of stainless steel coils needing to be cooled after hot rolling, resulting in a large waste of heat energy during the cooling process, and the debris and impurities adhering to the surface of the stainless steel plate before hot rolling also adversely affecting the hot rolling and reducing the precision of hot rolling.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a stainless steel coil hot rolling device, comprising a hot rolling box, wherein a preheating pipe and a cooling pipe are fixedly installed on both sides of the outer surface of the hot rolling box, respectively; the upper and lower surfaces of the preheating pipe are symmetrically provided with air outlet gaps, and the upper and lower surfaces of the cooling pipe are symmetrically provided with air inlet gaps; an induced draft fan is fixedly connected to the upper surface of the hot rolling box, the end of the input pipe of the induced draft fan is fixedly connected to the front surface of the cooling pipe, and the end of the output pipe of the induced draft fan is fixedly connected to a connecting air duct, and both ends of the connecting air duct are fixedly connected with air hoods, and the two air hoods are respectively fixedly fixed on the upper and lower surfaces of the preheating pipe near the two air outlet gaps; electric cylinders are symmetrically fixedly installed on the upper and lower surfaces of the preheating pipe, and scrapers are fixedly connected to the output ends of the two electric cylinders.

[0006] Preferably, a plurality of upper and lower hot rolling rolls are equidistantly rotatably installed inside the hot rolling box, and the upper and lower hot rolling rolls correspond one-to-one.

[0007] Preferably, a heater is fixedly installed inside the hot rolling box on the side near the preheating pipe.

[0008] Preferably, a dust filter screen is fixedly installed inside both of the air inlet gaps.

[0009] Preferably, the outer surface of the hot rolling mill is provided with a heat-insulating coating.

[0010] Preferably, the two scrapers are symmetrically fixedly connected to slide rods on opposite sides near the front and rear surfaces, and the outer surfaces of the four slide rods are slidably fitted with sliding sleeves, which are fixedly installed on the outer surface of the preheating pipe.

[0011] Preferably, a sealing baffle is fixedly installed on the inner wall of the preheating pipe near the inner side of the two scrapers.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model, by setting up a hot rolling box, preheating pipe, cooling pipe, induced draft fan, air inlet gap, air outlet gap, air hood, electric cylinder, and scraper, achieves the ability to recover and utilize the residual heat on the hot-rolled stainless steel coil. This allows the hot-rolled stainless steel coil to be cooled rapidly while preheating the stainless steel coil to be hot-rolled, thereby reducing energy consumption. At the same time, it removes the debris and impurities adhering to the surface of the steel plate to be hot-rolled, avoiding any impact on subsequent hot rolling and improving the hot rolling precision. The stainless steel coil passes through the preheating pipe, hot rolling box, and cooling pipe in sequence, and the debris and impurities adhering to the upper and lower surfaces of the stainless steel coil to be hot-rolled are scraped off by the scraper. After the induced draft fan is activated, cold air from the outside enters the interior of the cooling pipe through the two air inlet gaps and blows onto the upper and lower surfaces of the stainless steel coil, cooling the hot-rolled stainless steel coil. The heated air enters the interior of the two air hoods through the induced draft fan and blows onto the upper and lower surfaces of the stainless steel coil through the two air outlet gaps, blowing away the scraped debris and impurities while also preheating the stainless steel coil to be hot-rolled.

[0014] 2. This utility model improves the stability of the scraper by setting a sliding rod and a sliding sleeve. When the electric cylinder drives the scraper to rise and fall, the sliding rod rises and falls accordingly, and the sliding sleeve limits the rise and fall of the sliding rod, while acting on the scraper, thereby improving the stability of the scraper.

[0015] 3. By setting up a dust filter, this utility model can filter the air entering the cooling pipe, so as to prevent dust and impurities from entering the cooling pipe and adhering to the outer surface of the stainless steel coil. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2This is a partial three-dimensional structural diagram of the electric cylinder of this utility model;

[0018] Figure 3 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the main cross-section structure of this utility model.

[0020] Reference numerals: 1. Preheating pipe; 2. Connecting air duct; 3. Electric cylinder; 4. Hot rolling box; 5. Exhaust fan; 6. Cooling pipe; 7. Air inlet gap; 8. Scraper; 9. Sliding sleeve; 10. Sliding rod; 11. Air hood; 12. Dust filter screen; 13. Lower hot rolling roll; 14. Heater; 15. Sealing baffle; 16. Air outlet gap; 17. Upper hot rolling roll; 18. Thermal insulation coating. Detailed Implementation

[0021] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] like Figures 1-4 As shown, the present invention proposes a stainless steel coil hot rolling device, including a hot rolling box 4. A preheating pipe 1 and a cooling pipe 6 are fixedly installed on both sides of the outer surface of the hot rolling box 4, respectively. The preheating pipe 1 is open on both sides. The cooling pipe 6 and both sides of the hot rolling box 4 are provided with through inlets and outlets for the stainless steel coil to pass through. A heater 14 is fixedly installed inside the hot rolling box 4 near the side of the preheating pipe 1. The stainless steel coil is heated by the heater 14 before hot rolling. Several upper hot rolling rolls 17 and lower hot rolling rolls 13 are equidistantly rotatably installed inside the hot rolling box 4, and the upper hot rolling rolls 17 and lower hot rolling rolls 13 correspond one-to-one. The stainless steel coil is hot rolled by the upper hot rolling rolls 17 and lower hot rolling rolls 13, which are driven by an external motor. The outer surface of the hot rolling box 4 is provided with a heat insulation coating 18, which can reduce the heat loss inside the hot rolling box 4 and save energy.

[0024] The upper and lower surfaces of the preheating pipe 1 are symmetrically provided with air outlet gaps 16, and the upper and lower surfaces of the cooling pipe 6 are symmetrically provided with air inlet gaps 7. Dust filters 12 are fixedly installed inside both air inlet gaps 7. The dust filters 12 can filter the air entering the cooling pipe 6 to prevent dust and impurities from entering the cooling pipe 6 and adhering to the outer surface of the stainless steel coil. The upper surface of the hot rolling box 4 is fixedly connected to the induced draft fan 5. The end of the input pipe of the induced draft fan 5 is fixedly connected to the front surface of the cooling pipe 6. The end of the output pipe of the induced draft fan 5 is fixedly connected to the connecting air duct 2, and both ends of the connecting air duct 2 are fixedly connected to the air hoods 11. The two air hoods 11 are fixedly fixed on the upper and lower surfaces of the preheating pipe 1, respectively, near the two air outlet gaps 16. Electric cylinders 3 are symmetrically fixedly installed on the upper and lower surfaces of the preheating pipe 1, and scrapers 8 are fixedly connected to the output ends of the two electric cylinders 3. The output ends of the electric cylinders 3 drive the scrapers 8 to rise and fall so that the scrapers 8 contact the upper and lower surfaces of the stainless steel coil.

[0025] In use, the stainless steel coil passes sequentially through the preheating pipe 1, the hot rolling box 4, and the cooling pipe 6. The scraper 8 removes the debris and impurities adhering to the upper and lower surfaces of the stainless steel coil to be hot rolled. After the blower 5 starts working, cold air from the outside enters the cooling pipe 6 through the two air inlet gaps 7 and blows it onto the upper and lower surfaces of the stainless steel coil, thus cooling the hot-rolled stainless steel coil. The heated air enters the two air hoods 11 through the blower 5 and blows it onto the upper and lower surfaces of the stainless steel coil through the two air outlet gaps 16, removing the scraped debris and impurities while also preheating the stainless steel coil to be hot rolled, thereby reducing the energy consumption required for subsequent heating of the stainless steel coil.

[0026] Example 2

[0027] like Figure 1 , Figure 2 and Figure 4 As shown, the stainless steel coil hot rolling device proposed in this utility model, compared with the first embodiment, further includes two scrapers 8 with opposite sides symmetrically fixedly connected to slide rods 10 near the front and rear surfaces. Slide sleeves 9 are slidably sleeved on the outer surfaces of the four slide rods 10, and the slide sleeves 9 are fixedly installed on the outer surface of the preheating tube 1. A sealing baffle 15 is fixedly installed on the inner wall of the preheating tube 1 near the inner side of the two scrapers 8. A gap is provided between the two sealing baffles 15 for the stainless steel coil to pass through. The sealing baffle 15 can play a sealing role to prevent preheating air and blown debris from passing through the preheating tube 1 and entering the hot rolling box 4.

[0028] In this embodiment, when the output end of the electric cylinder 3 drives the scraper 8 to rise and fall, the slide rod 10 rises and falls accordingly, and the sliding sleeve 9 limits the rise and fall of the slide rod 10, while acting on the scraper 8, thereby improving the stability of the scraper 8.

[0029] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A hot rolling device for stainless steel coil sheets, comprising a hot rolling box (4), characterized in that: The hot rolling box (4) is provided with a preheating pipe (1) and a cooling pipe (6) fixedly installed on both sides of the outer surface of the hot rolling box (4), the upper surface and the lower surface of the preheating pipe (1) are symmetrically provided with air outlet gaps (16), the upper surface and the lower surface of the cooling pipe (6) are symmetrically provided with air inlet gaps (7), the upper surface of the hot rolling box (4) is fixedly connected with an air guide fan (5), the front surface of the cooling pipe (6) is fixedly connected with the output pipe end of the air guide fan (5), the output pipe end of the air guide fan (5) is fixedly connected with a connecting air pipe (2), both ends of the connecting air pipe (2) are fixedly connected with air hoods (11), the air hoods (11) are fixedly arranged on the upper surface and the lower surface of the preheating pipe (1) near the two air outlet gaps (16), respectively, electric cylinders (3) are symmetrically fixedly installed on the upper surface and the lower surface of the preheating pipe (1), and the output ends of the electric cylinders (3) are fixedly connected with scrapers (8).

2. The hot rolling device for stainless steel coil sheet according to claim 1, characterized in that: A plurality of upper hot rolling rollers (17) and lower hot rolling rollers (13) are equidistantly rotatably installed in the hot rolling box (4), and the upper hot rolling rollers (17) and the lower hot rolling rollers (13) are in one-to-one correspondence in the up-down direction.

3. The hot rolling device for stainless steel coil sheet according to claim 1, characterized in that: A heater (14) is fixedly installed on one side of the hot rolling box (4) close to the preheating pipe (1).

4. The hot rolling device for stainless steel coil sheet according to claim 1, characterized in that: Dust filter nets (12) are fixedly installed in the two air inlet gaps (7).

5. The hot rolling device for stainless steel coil sheet according to claim 1, characterized in that: The hot rolling box (4) is provided with a heat preservation coating (18) on the outer surface.

6. The hot rolling device for stainless steel coil sheet according to claim 1, characterized in that: The surfaces of the two scrapers (8) away from each other are symmetrically fixedly connected with slide rods (10) near the front surface and the rear surface, respectively, the outer surfaces of the four slide rods (10) are slidably sleeved with slide sleeves (9), and the slide sleeves (9) are fixedly installed on the outer surface of the preheating pipe (1).

7. The hot rolling apparatus for stainless steel coils according to claim 6, wherein: Sealing baffles (15) are fixedly installed on the inner walls of the preheating pipe (1) near the inner sides of the two scrapers (8).

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