Dust removal guide device and rolling mill

Abstract

The application discloses a dust removal guide device and a rolling mill, and belongs to the technical field of metal rolling equipment. In order to solve the problems of high energy consumption and poor dust removal effect of the dust removal smoke hood arranged outside the rolling mill rack in the prior art, the dust removal guide device comprises a smoke exhaust hood (1) and a guide plate (2) connected in sequence, a plurality of first dust suction through holes (21) are arranged in the guide plate (2), the smoke exhaust hood (1) comprises a smoke exhaust cavity (11), and the smoke exhaust cavity (11) is communicated with the first dust suction through holes (21). The dust removal guide device integrates the smoke exhaust hood and the guide plate, the dust suction through holes are arranged on the guide plate, the smoke exhaust hood is close to the smoke dust generation point by making the most of the characteristics that the guide plate is close to the smoke dust generation point, the smoke dust is eliminated before the smoke dust is diffused, the dust removal effect is good, and the smoke exhaust energy consumption can be reduced.

Description

Technical Field

[0001] This invention relates to the field of metal rolling equipment technology, specifically a dust removal and guiding device, or a rolling mill. Background Technology

[0002] During the rolling process of medium and heavy plates, impurities, fly ash, and recycled iron oxide scale inevitably exist on the surface of the steel billet. When the billet enters the rolling mill, it generates a large amount of iron oxide-containing dust, which diffuses outward from the mill frame. This dust not only pollutes the production environment and equipment, but long-term exposure to the dust can also seriously affect the health of operators. Therefore, it is necessary to treat the dust to reduce its harmful effects.

[0003] Currently, the dust removal methods used for the aforementioned rolling process include negative pressure suction dust collection, where the dust hood is installed on the outside of the rolling mill stand. For example, Chinese utility model patent CN201067757Y, published on June 4, 2008, discloses a "Dust Removal Equipment for Steel Plant Bar Rolling Line". Negative pressure suction dust collection plays a positive role in reducing slag buildup in the rolling mill and reducing the intrusion of foreign objects into the steel plate. However, current negative pressure suction methods suffer from large dust hood volume, large total air volume, high energy consumption, and less than ideal dust removal effect. Summary of the Invention

[0004] To address the problems of high energy consumption and unsatisfactory dust removal effect when placing dust extraction hoods outside the rolling mill stand in existing technologies, this invention provides a dust removal guide device and a rolling mill. The dust removal guide device integrates the exhaust hood and the guide plate into one unit. The guide plate is provided with dust extraction through holes. By taking advantage of the guide plate's proximity to the dust generation point, it can reach the dust generation point as close as possible and eliminate the dust before it spreads. This not only provides good dust removal effect but also reduces exhaust energy consumption.

[0005] The technical solution adopted by the embodiments of the present invention to solve its technical problem is as follows:

[0006] A dust removal and guide device includes an exhaust hood and a guide plate connected vertically. The guide plate is provided with a plurality of first dust suction holes. The exhaust hood contains an exhaust chamber, which is connected to the first dust suction holes.

[0007] A rolling mill includes rolls and the aforementioned dust removal guide device, the dust removal guide device being located on the inlet side and outlet side of the rolling mill.

[0008] The beneficial effects of the embodiments of the present invention are:

[0009] 1. The dust removal guide device integrates the smoke hood and the guide plate into one unit. The guide plate is provided with dust suction holes. Taking advantage of the fact that the guide plate is close to the point of smoke generation, it gets as close as possible to the point of smoke generation and eliminates the smoke before it spreads. This not only has a good dust removal effect, but also reduces the energy consumption of smoke exhaust.

[0010] 2. Compared to the negative pressure dust collection system with transmission, when the valves on the inlet and outlet sides are completely closed, the cost per ton of steel is reduced by approximately RMB 1.003 / ton, and when the valves on the inlet and outlet sides are completely open, the cost per ton of steel is reduced by approximately RMB 0.163 / ton. Attached Figure Description

[0011] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0012] Figure 1 This is a schematic diagram of the rolling mill described in this invention.

[0013] Figure 2 yes Figure 1 Schematic diagram of the dust removal and guide device, external water collection and dust suction hood, and smoke exhaust duct system on the central inlet side.

[0014] Figure 3 This is a three-dimensional view of the dust removal and guarding device on the entrance side.

[0015] Figure 4 This is a top-down 3D schematic diagram of the dust removal and guarding device on the entrance side.

[0016] Figure 5 This is a top-down 3D schematic diagram of the dust removal and guard device on the entrance side after it has been cut open.

[0017] Figure 6 This is a cross-sectional schematic diagram of the dust removal and guard device on the inlet side.

[0018] Figure 7 This is a three-dimensional view taken from below after the dust removal and guarding device on the entrance side has been cut open.

[0019] Figure 8 yes Figure 6 Enlarged diagram of the lower middle section.

[0020] Figure 9 This is a right-side view of the smoke hood on the entrance side.

[0021] Figure 10 This is a cross-sectional schematic diagram of the external water collection and dust extraction hood on the outlet side.

[0022] Figure 11 This is a front view schematic diagram of the external water collection hood on the outlet side.

[0023] Figure 12 This is a right-side view of the external water collection hood on the outlet side.

[0024] Figure 13 This is a cross-sectional schematic diagram of the external water collection hood on the outlet side.

[0025] Figure 14 This is a top view of the external water collection hood on the outlet side.

[0026] Figure 15 This is a cross-sectional view of the outer dust hood on the outlet side.

[0027] The annotations in the attached figures are explained as follows:

[0028] 1. Smoke hood; 2. Guide plate; 3. External water collection and dust collection hood; 4. Smoke exhaust duct system; 5. Rolls; 6. Rolling point; 7. Conveyor rollers;

[0029] 11. Smoke exhaust chamber; 12. Front side panel; 13. Inner side panel; 14. Rear side panel; 15. Outer side panel; 16. Drain outlet; 17. Upper side panel; 18. Inner partition;

[0030] 21. First suction hole; 22. Water baffle plate; 23. Water collection trough; 24. Water level plate;

[0031] 31. External water collection hood; 32. External dust collection hood;

[0032] 41. Main exhaust pipe; 42. Inner exhaust riser; 43. Outer exhaust riser; 44. Valve;

[0033] 111. Water collection area; 112. Vacuuming area;

[0034] 131. Inner upper vertical slab section; 132. Inner inclined section; 133. Inner lower slab section;

[0035] 151. Upper outer slab section; 152. Outer inclined section; 153. Lower outer slab section;

[0036] 171. Upper vertical plate section; 172. Lower flat plate section;

[0037] 181. Ventilation opening;

[0038] 231. Upper catchment area; 232. Lower enclosed area;

[0039] 311. Water collection cavity; 312. Upper cover plate; 313. Lower cover plate; 314. Inner vertical plate; 315. Outer vertical plate; 316. Transition cavity;

[0040] 321. Dust suction chamber; 322. Conical hood; 323. Downward inclined plate;

[0041] 3131. Inclined section; 3132. Curved section; 3133. Upright section;

[0042] 3141. Second suction hole;

[0043] 3151, Third dust suction hole;

[0044] 3231. Fourth dust suction hole. Detailed Implementation

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] For ease of understanding and description, the following description of the present invention uses absolute positional relationships. Unless otherwise specified, the directional term "above" indicates... Figure 1 The direction above, the directional word "down" indicates Figure 1 The lower side of the middle, the directional word "left" indicates Figure 1 The left side of the direction, the directional word "right" indicates Figure 1 The right-hand direction in the text, the directional word "front" indicates perpendicular to. Figure 1 The direction of the paper and pointing inwards from the paper; the directional word "back" indicates perpendicular to the paper. Figure 1 The direction is towards the outside of the paper surface. Unless otherwise specified, the directional term "inner" indicates the direction facing the roll 5, and the directional term "outer" indicates the direction away from the roll 5. This invention is described from the perspective of the reader or user, but the above directional terms should not be understood or interpreted as limiting the scope of protection of this invention.

[0047] like Figures 1 to 4 As shown in the figure, a dust removal and guiding device according to an embodiment of the present invention includes a smoke exhaust hood 1 and a guide plate 2 connected vertically. The smoke exhaust hood 1 and the guide plate 2 are connected as a whole. A plurality of first dust suction holes 21 are provided in the guide plate 2. The smoke exhaust hood 1 contains a smoke exhaust chamber 11, and the smoke exhaust chamber 11 communicates with the first dust suction holes 21.

[0048] The dust removal guide device (also known as a guide device with dust removal function) integrates the exhaust hood 1 and the guide plate 2 into one unit. This dust removal guide device not only has the guiding function of existing guide devices but also the function of removing rolling dust. The guide plate 2 is provided with a first dust suction hole 21. Taking advantage of the guide plate 2's proximity to the dust generation point (i.e., rolling point 6), it approaches the dust generation point to the maximum extent, eliminating the dust before it spreads. Compared with existing technologies, it achieves better dust removal effect at the same power; and lower exhaust energy consumption at the same dust removal effect.

[0049] like Figures 3 to 8As shown, the outlet of the fume hood 1 is located at the upper end of the fume hood 1, and the inlet of the fume hood 1 is located at the lower end of the fume hood 1. This can also be understood as the first dust suction hole 21 being the inlet of the fume hood 1. The fume hood 1 is generally an upright cylindrical structure, containing a front side plate 12, an inner side plate 13, a rear side plate 14, and an outer side plate 15 connected sequentially along the circumference. The inner side plate 13 faces the roll 5, and the outer side plate 15 faces away from the roll 5. Multiple first dust suction holes 21 are arranged at intervals along the axial direction of the roll 5.

[0050] The exhaust hood 1 has a roughly boot-shaped cross-section, with the toe of the boot pointing towards the roll 5. The inner plate 13 includes an inner upper vertical plate section 131, an inner inclined section 132, and an inner lower plate section 133 arranged sequentially from top to bottom. Along the rolling direction, the distance from the inner lower plate section 133 to the rolling point 6 is less than the distance from the inner upper vertical plate section 131 to the rolling point 6. The guide plate 2 is inclined, and the distance from the lower end of the guide plate 2 to the rolling point 6 is less than the distance from the lower end of the guide plate 2 to the rolling point 6.

[0051] A water-blocking vertical plate 22 is connected to the upper surface of the guide plate 2. The water-blocking vertical plate 22 is located inside the smoke exhaust chamber 11 and extends along the axial direction of the roll 5. The water-blocking vertical plate 22 divides the lower part of the smoke exhaust chamber 11 into a water collection area 111 and a dust collection area 112. Along the rolling direction A, the distance from the dust collection area 112 to the rolling point 6 is less than the distance from the water collection area 111 to the rolling point 6.

[0052] like Figure 8 As shown, along the rolling direction A, the inner side of the water-retaining vertical plate 22 and the inner side of the inner upper vertical plate section 131 both face away from the rolling point 6. The distance L1 from the inner side of the water-retaining vertical plate 22 to the rolling point 6 is less than or equal to the distance L2 from the inner side of the inner upper vertical plate section 131 to the rolling point 6. The outer plate 15, the guide plate 2, and the water-retaining vertical plate 22 are connected to form a water collection trough 23, which is located in the water collection area 111. Along the rolling direction A, the first dust suction hole 21 is located between the water-retaining vertical plate 22 and the inner lower plate section 133. The dust suction area 112 is located directly above the first dust suction hole 21.

[0053] like Figures 6 to 8 As shown, a water collection plate 24 is provided inside the water collection tank 23. The water collection plate 24 extends along the axis of the roller 5. The water collection tank 23 is divided by the water collection plate 24 into an upper water collection area 231 (also called a water collection plate) and a lower closed area 232. Drainage outlets 16 are provided at the lower ends of the front side plate 12 and the rear side plate 14. The upper water collection area 231 and the lower closed area 232 are both connected to the drainage outlets 16.

[0054] During the rolling process, the rolling mill generates a large amount of water vapor. The dust removal and guiding device inevitably draws in this water vapor. The lower end of the inner exhaust riser 42 is inserted into the outlet of the exhaust hood 1. Water vapor enters the inner exhaust riser 42 from the exhaust chamber 11 of the exhaust hood 1. As the water vapor rises along the inner exhaust riser 42, it condenses into liquid water (i.e., condensate). The condensate flows down the wall of the inner exhaust riser 42. The distance L1 from the inner side of the water baffle plate 22 to the rolling point 6 is less than or equal to the distance L2 from the inner side of the inner upper riser section 131 to the rolling point 6. Therefore, the condensate can only flow into or drip into the upper water collection area 231 and will not enter the dust collection area 112. After accumulating in the upper water collection area 231, the condensate is discharged from the drain outlet 16.

[0055] Along the axial direction of the roll 5, the width of the guide plate 2 is greater than the width of the rolled steel plate, so that the condensate discharged from the drain outlet 16 will not fall onto the steel plate. A movable sealing baffle can be provided outside the drain outlet 16. The movable sealing baffle can move along the rolling direction, thereby adjusting the opening size of the drain outlet 16. The drain outlet 16 can also draw in dust from the mill drive side and the mill operation side.

[0056] like Figures 3 to 8 As shown, the outer side plate 15 includes an outer upper vertical plate section 151, an outer inclined section 152, and an outer lower plate section 153 arranged sequentially from top to bottom. The outer upper vertical plate section 151 is parallel to the inner upper vertical plate section 131. Along the rolling direction A, the distance from the outer lower plate section 153 to the rolling point 6 is less than the distance from the outer upper vertical plate section 151 to the rolling point 6. Along the bottom-up direction, the connection between the inner upper vertical plate section 131 and the inner inclined section 132 is located between the upper and lower ends of the outer inclined section 152, and the flow area of ​​the exhaust chamber 11 first decreases and then increases. A necking section is formed between the connection between the inner upper vertical plate section 131 and the inner inclined section 132 and the outer inclined section 152.

[0057] When the distance from the outer lower plate section 153 to the rolling point 6 is less than the distance L2 from the inner side of the inner upper vertical plate section 131 to the rolling point 6, the condensate flowing out of the inner exhaust riser 42 will all fall onto the outer inclined section 152, and then flow into the upper water collection area 231 along the outer inclined section 152. This can prevent the condensate flowing out of the inner exhaust riser 42 from falling directly into the upper water collection area 231 and splashing into the dust collection area 112.

[0058] like Figure 9 As shown, the smoke hood 1 also includes two upper side plates 17 arranged at intervals. The two upper side plates 17 are mirror images of each other. The upper side plate 17 includes an upper vertical plate section 171 and a lower flat plate section 172 connected vertically. The inner side plate 13, the outer side plate 15 and the upper vertical plate section 171 of the two upper side plates 17 form the outlet section of the smoke exhaust chamber 11. The outlet of the smoke hood 1 is located at the upper end of the outlet of the smoke exhaust chamber 11.

[0059] To ensure that the airflow velocity in the lower part of the exhaust chamber 11 is as uniform as possible, multiple upright inner partitions 18 are provided inside the exhaust chamber 11. The multiple inner partitions 18 are arranged at intervals along the axial direction of the roll 5 and are perpendicular to the axial direction of the roll 5. There is a gap between the upper side of the inner partition 18 and the lower plate segment 172. The lower part of the exhaust chamber 11 is divided into multiple exhaust zones by the inner partitions 18. The inner side of the inner partition 18 is connected to the inner side plate 13, the lower side of the inner partition 18 is connected to the guide plate 2, and the outer side of the inner partition 18 is connected to the outer side plate 15. Multiple ventilation holes 181 are provided on the inner partition 18, and two adjacent exhaust zones are connected through the ventilation holes 181.

[0060] The dust removal guide device also includes a lifting mechanism, which allows the dust removal guide device to move up and down, thus adjusting it to the desired position as needed. The upper part of both the inner side plate 13 and the outer side plate 15 is provided with two mounting grooves, spaced apart and mirror images of each other. The lower flat plate section 172 of the upper side plate 17 is located below the mounting grooves. The two mounting grooves are used to install and connect the lifting mechanism. Along the front-to-back direction, the outlet of the fume hood 1 is located between the two mounting grooves.

[0061] The following describes a rolling mill, which includes a stand, rolls 5, and the aforementioned dust removal guide device. The dust removal guide device is located on the inlet side and outlet side of the rolling mill. The inlet side is the left side of the stand, and the outlet side is the right side of the stand. The two dust removal guide devices located on the inlet and outlet sides have identical structures and are mirror images of each other, as shown below. Figure 1 As shown.

[0062] The rolling mill also includes an external water collection and dust extraction hood 3, located on the inlet and outlet sides of the rolling mill. The two external water collection and dust extraction hoods 3 located on the inlet and outlet sides have identical structures and are mirror images of each other. Along the rolling direction A, two dust removal guide devices are located between the two external water collection and dust extraction hoods 3. The rolling mill can be a finishing mill or a roughing mill. When the rolling mill is a finishing mill, it includes both the dust removal guide devices and the external water collection and dust extraction hood 3; when the rolling mill is a roughing mill, it only includes the dust removal guide devices and does not include the external water collection and dust extraction hood 3. Both the dust removal guide devices and the external water collection and dust extraction hood 3 are located above the conveyor roll 7. To reduce flue gas escape, upright covers can be installed at the front and rear ends of the guide plate 2, with the distance between the two covers greater than or equal to the width of the conveyor roll 7.

[0063] like Figures 1 to 2As shown, the rolling mill also includes a flue gas duct system 4, which is located on both the inlet and outlet sides of the rolling mill. The two flue gas duct systems 4 on the inlet and outlet sides have identical structures and are mirror images of each other. The flue gas duct system 4 includes a main flue gas pipe 41, which is connected to a flue gas fan, an inner flue gas riser 42, and an outer flue gas riser 43. The inner flue gas riser 42 is vertically connected to the dust removal guide device, and the outer flue gas riser 43 is vertically connected to the outer water collection and dust extraction hood 3. The lower end of the inner flue gas riser 42 is inserted (or can be connected by a flexible or rigid connection) into the outlet of the flue gas hood 1, and the lower end of the outer flue gas riser 43 is inserted (or can be connected by a flexible or rigid connection) into the outlet of the outer water collection and dust extraction hood 3. A valve 44 is provided on the outer flue gas riser 43. The valve 44 can be an existing butterfly valve, which can be used to select whether the outer water collection and dust extraction hood 3 is in operation as needed. Valve 44 can also be used to adjust the air volume and speed distribution within the smoke exhaust hood 1 and the external water collection dust extraction hood 3.

[0064] like Figures 10 to 14 As shown, the external water collection and dust suction hood 3 includes an external water collection hood 31 and an external dust suction hood 32. The external water collection hood 31 contains a water collection chamber 311, and the external dust suction hood 32 contains a dust suction chamber 321. The water collection chamber 311 and the dust suction chamber 321 are arranged along the rolling direction, and the distance from the water collection chamber 311 to the rolling point 6 is less than the distance from the dust suction chamber 321 to the rolling point 6. For example, on the inlet side of the rolling mill, the dust suction chamber 321 and the water collection chamber 311 are arranged sequentially along the rolling direction, and on the outlet side of the rolling mill, the water collection chamber 311 and the dust suction chamber 321 are arranged sequentially along the rolling direction. The specific structure of the external water collection and dust suction hood 3 will be described in detail below, taking the outlet side external water collection and dust suction hood 3 as an example:

[0065] The outer water collection cover 31 includes an upper cover plate 312 and a lower cover plate 313 spaced apart vertically. The upper cover plate 312 is a flat plate and is horizontal. The lower cover plate 313 includes an inclined section 3131, a curved section 3132, and a vertical section 3133 connected sequentially along the rolling direction. The distance from the lower end of the inclined section 3131 to the rolling point 6 is less than the distance from the upper end of the inclined section 3131 to the rolling point 6. The curved section 3132 is curved upwards. The outer water collection cover 31 has an arc-shaped structure and includes an inner vertical plate 314 and an outer vertical plate 315 spaced apart along the rolling direction. Both the inner vertical plate 314 and the outer vertical plate 315 are located below the upper cover plate 312. Both the inner vertical plate 314 and the outer vertical plate 315 are elongated structures and extend along the axial direction of the roll 5. The upper end of the inner vertical plate 314 is connected to the upper cover plate 312, and the lower end of the inner vertical plate 314 is connected to the inclined section 31. The lower end of 31 is sealed. Multiple second dust collection holes 3141 are provided within the inner vertical plate 314. The water collection cavity 311 is located between the inclined section 3131 and the upper cover plate 312. The flow area of ​​the water collection cavity 311 gradually decreases along the rolling direction. There is a gap between the upright section 3133 and the outer vertical plate 315. Along the rolling direction, both the curved section 3132 and the upright section 3133 are located between the inner vertical plate 314 and the outer vertical plate 315. The upright section 313... A transition cavity 316 is formed between the outer vertical plate 315 and the outer vertical plate 316. The lower end of the transition cavity 316 is open. Multiple third dust suction holes 3151 are provided inside the outer vertical plate 315. The multiple third dust suction holes 3151 and multiple second dust suction holes 3141 are arranged at intervals along the axial direction of the roller 5. The exterior of the outer water collection cover 31, the second dust suction holes 3141, the water collection cavity 311, the transition cavity 316, and the third dust suction holes 3151 are connected in sequence. Upright cover plates are provided at the front and rear ends of the outer water collection cover 31. The distance between the two cover plates is greater than or equal to the width of the conveyor roller 7.

[0066] like Figure 15 As shown, the outer dust collection hood 32 also includes a conical hood 322 and a lower inclined plate 323 connected vertically. One or more (e.g., two) conical hoods 322 are arranged along the axial direction of the roller 5. The dust collection chamber 321 is located inside the conical hood 322. The upper end of the conical hood 322 is the outlet of the outer water collection dust collection hood 3, and the lower end of the conical hood 322 is in an open state. The upper cover plate 312 is provided with multiple hood mounting through holes. The lower end of the conical hood 322 is welded to the corresponding hood mounting through holes of the upper cover plate 312. The outer vertical plate 315 is located between the upright section 3133 and the lower inclined plate 323. The inner wall of the conical cover 322 faces the roll 5. The lower inclined plate 323 is connected to the inner wall of the conical cover 322 as a whole. The lower end of the lower inclined plate 323 is connected to the outer upright plate 315. Multiple fourth dust suction holes 3231 are provided in the lower inclined plate 323. The multiple fourth dust suction holes 3231 are arranged at intervals along the axial direction of the roll 5. The third dust suction hole 3151, the fourth dust suction hole 3231 and the dust suction chamber 321 are connected in sequence.

[0067] The function of the outer water collection and dust suction hood 3 is to collect the descaling water generated during the rolling process, preventing it from splashing onto other areas. The outer water collection and dust suction hood 3 also absorbs the smoke and dust escaping from the dust removal guide device. Since the smoke and dust are mainly sucked away by the dust removal guide device, the volume of the outer water collection and dust suction hood 3 can be less than half the volume of the existing dust suction hood outside the rolling mill stand. The descaling water can enter the water collection chamber 311 through the second dust suction through hole 3141, and after encountering the inclined section 3131, it flows downwards to the lower part of the water collection chamber 311. The smoke and dust outside the second dust suction through hole 3141 sequentially passes through the second dust suction through hole 3141, the water collection chamber 311, the transition chamber 316, the third dust suction through hole 3151, the fourth dust suction through hole 3231, and the dust suction chamber 321 before entering the outer exhaust riser 43. The smoke and dust below the transition chamber 316 pass through the transition chamber 316, the third suction hole 3151, the fourth suction hole 3231, and the suction chamber 321 in sequence before entering the outer exhaust riser 43. The smoke and dust below the outer suction hood 32 pass through the suction chamber 321 before entering the outer exhaust riser 43.

[0068] The working process of the dust removal and guiding device and the rolling mill (finishing mill) is described below.

[0069] When the exhaust fan of the exhaust duct system 4 is started, the steel plate or strip is rolled by the rolls 5 at the rolling point 6. During the rolling process, a large amount of water vapor and dust are generated. Most of the water vapor and dust enter the exhaust chamber 11 through the first dust suction hole 21. As the water vapor rises along the inner exhaust riser 42, it condenses into liquid water (i.e., condensate). The condensate flows down the wall of the inner exhaust riser 42, flowing into or dripping into the upper water collection area 231. The water in the upper water collection area 231 is discharged from the drain outlet 16. The dust is discharged from the inner exhaust riser 42.

[0070] When the smoke and dust begin to spread outside the rolling mill stand, indicating that the dust removal guide device has failed to completely absorb the smoke and dust, valve 44 is opened, and the outer water collection dust hood 3 operates. The descaling water outside the second dust suction hole 3141 enters the outer water collection dust hood 3 through the second dust suction hole 3141 and collects at the lower part of the water collection chamber 311. The smoke and dust outside the second dust suction hole 3141 enters the outer water collection dust hood 3 through the second dust suction hole 3141 and then enters the outer exhaust riser 43 for discharge. The smoke and dust below the transition chamber 316 enters the outer water collection dust hood 3 from the lower end of the transition chamber 316 and then enters the outer exhaust riser 43 for discharge. The smoke and dust below the outer dust hood 32 enters the outer water collection dust hood 3 from the lower end of the dust suction chamber 321 and then enters the outer exhaust riser 43 for discharge. When the dust is removed from the mill stand by the dust removal guide devices on the inlet and outlet sides, valve 44 can be closed, which is beneficial to the energy saving of the entire dust removal system.

[0071] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, any substitution of equivalent components or equivalent changes and modifications made within the scope of protection of this patent should still fall within the scope of this patent. Furthermore, the technical features, technical solutions, and embodiments of the present invention can be freely combined and used together.

Claims

1. A dust removal and guiding device, characterized in that, The dust removal guide device includes a smoke hood (1) and a guide plate (2) connected vertically. The guide plate (2) is provided with a plurality of first dust suction holes (21). The smoke hood (1) contains a smoke exhaust chamber (11) and the smoke exhaust chamber (11) is connected to the first dust suction holes (21). The outlet of the exhaust hood (1) is located at the upper end of the exhaust hood (1). The exhaust hood (1) contains a front side plate (12), an inner side plate (13), a rear side plate (14) and an outer side plate (15) connected in sequence along the circumference. The inner side plate (13) faces the roll (5). The inner side plate (13) contains an inner upper vertical plate section (131), an inner inclined section (132) and an inner lower plate section (133) arranged in sequence from top to bottom. Along the rolling direction, the distance from the inner lower plate section (133) to the rolling point (6) is less than the distance from the inner upper vertical plate section (131) to the rolling point (6). Multiple first dust suction holes (21) are arranged at intervals along the axial direction of the roll (5). A water-blocking plate (22) is connected to the upper surface of the guide plate (2). The water-blocking plate (22) is located in the smoke exhaust chamber (11). The water-blocking plate (22) extends along the axis of the roll (5). Along the rolling direction, the distance from the inner side of the water-blocking plate (22) to the rolling point (6) is less than or equal to the distance from the inner side of the inner upper plate section (131) to the rolling point (6). The outer plate (15), the guide plate (2), and the water-blocking plate (22) are connected to form a water collection trough (23). The first dust suction hole (21) is located between the water-blocking plate (22) and the inner lower plate section (133).

2. The dust removal and guiding device according to claim 1, characterized in that, A water collection trough (23) is provided with a water collection plate (24), which extends along the axis of the roller (5). The water collection trough (23) is divided into an upper water collection area (231) and a lower closed area (232) by the water collection plate (24). Drainage outlets (16) are provided at the lower ends of the front side plate (12) and the rear side plate (14). The upper water collection area (231) and the lower closed area (232) are connected to the drainage outlets (16).

3. The dust removal and guiding device according to claim 1, characterized in that, The outer plate (15) contains an outer upper vertical plate section (151), an outer inclined section (152) and an outer lower plate section (153) arranged sequentially from top to bottom. Along the rolling direction, the distance from the outer lower plate section (153) to the rolling point (6) is less than the distance from the outer upper vertical plate section (151) to the rolling point (6). Along the direction from bottom to top, the connection between the inner upper vertical plate section (131) and the inner inclined section (132) is located between the upper and lower ends of the outer inclined section (152). The flow area of ​​the exhaust chamber (11) first decreases and then increases.

4. The dust removal and guiding device according to claim 1, characterized in that, The exhaust hood (1) also includes two upper side plates (17) spaced apart front and back. The upper side plates (17) include an upper vertical plate section (171) and a lower flat plate section (172) connected vertically. The inner side plate (13), the outer side plate (15) and the upper vertical plate section (171) of the two upper side plates (17) form the outlet section of the exhaust chamber (11). The exhaust chamber (11) is provided with multiple inner partitions (18). The multiple inner partitions (18) are arranged at intervals along the axis of the roll (5). The inner partitions (18) and the axis of the roll (5) are... The direction is vertical, and there is a gap between the upper side of the inner partition (18) and the lower plate section (172). The lower part of the smoke exhaust chamber (11) is divided into multiple smoke exhaust zones by the inner partition (18). The inner side of the inner partition (18) is connected to the inner side plate (13), the lower side of the inner partition (18) is connected to the guide plate (2), and the outer side of the inner partition (18) is connected to the outer side plate (15). Multiple ventilation holes (181) are provided on the inner partition (18), and two adjacent smoke exhaust zones are connected through the ventilation holes (181).

5. A rolling mill, characterized in that, The mill includes rolls (5) and a dust removal guide device as described in claim 1, the dust removal guide device being located on the inlet side and outlet side of the mill.

6. The rolling mill according to claim 5, characterized in that, The rolling mill also includes an external water collection dust hood (3) and a flue gas system (4). The external water collection dust hood (3) is also located on the inlet and outlet sides of the rolling mill. Along the rolling direction, the dust removal guide device is located between the rolling point (6) and the external water collection dust hood (3). The flue gas system (4) is also located on the inlet and outlet sides of the rolling mill. The flue gas system (4) includes a main flue gas pipe (41). The main flue gas pipe (41) is connected to an inner flue gas riser (42) and an outer flue gas riser (43). The lower end of the inner flue gas riser (42) is inserted into the outlet of the flue gas hood (1). The lower end of the outer flue gas riser (43) is inserted into the outlet of the external water collection dust hood (3). A valve (44) is provided on the outer flue gas riser (43).

7. The rolling mill according to claim 6, characterized in that, The external water collection and dust suction hood (3) includes an external water collection hood (31) and an external dust suction hood (32). The external water collection hood (31) contains a water collection chamber (311), and the external dust suction hood (32) contains a dust suction chamber (321). The water collection chamber (311) and the dust suction chamber (321) are arranged along the rolling direction. The distance from the water collection chamber (311) to the rolling point (6) is less than the distance from the dust suction chamber (321) to the rolling point (6). The external water collection hood (31) contains an upper cover plate (312) and a lower cover plate (313) arranged at intervals. The lower cover plate (313) contains a water collection chamber (312) and a dust suction chamber (321) arranged along the rolling direction. The inclined section (3131), the curved section (3132), and the upright section (3133) are connected in sequence. The distance from the lower end of the inclined section (3131) to the rolling point (6) is less than the distance from the upper end of the inclined section (3131) to the rolling point (6). The outer water collection cover (31) also includes an inner vertical plate (314) and an outer vertical plate (315) spaced apart along the rolling direction. The inner vertical plate (314) and the outer vertical plate (315) are both located below the upper cover plate (312). The inner vertical plate (314) and the outer vertical plate (315) both extend along the axial direction of the roll (5). The upper end of the inner vertical plate (314) is connected to the upper cover plate (312), and the lower end of the inner vertical plate (314) is sealed to the lower end of the inclined section (3131). Multiple second dust suction holes (3141) are provided inside the inner vertical plate (314). The water collection cavity (311) is located between the inclined section (3131) and the upper cover plate (312). The flow area of ​​the water collection cavity (311) gradually decreases along the rolling direction. There is a gap between the upright section (3133) and the outer vertical plate (315). Both the curved section (3132) and the upright section (3133) are located within the inner vertical plate (315). Between the vertical section (3133) and the outer vertical plate (315), a transition cavity (316) is formed between the vertical section (3133) and the outer vertical plate (315). The lower end of the transition cavity (316) is open. Multiple third dust suction holes (3151) are provided in the outer vertical plate (315). Multiple third dust suction holes (3151) and multiple second dust suction holes (3141) are arranged at intervals along the axial direction of the roll (5). The second dust suction holes (3141), the water collection cavity (311), the transition cavity (316) and the third dust suction holes (3151) are connected in sequence.

8. The rolling mill according to claim 7, characterized in that, The outer dust hood (32) also includes a conical hood (322) and a lower inclined plate (323) connected vertically. The dust suction chamber (321) is located inside the conical hood (322). The upper end of the conical hood (322) is the outlet of the outer water collection dust hood (3). The lower end of the conical hood (322) is in an open state. Multiple hood mounting through holes are provided on the upper cover plate (312). The lower end of the conical hood (322) is connected to the hood mounting through holes of the upper cover plate (312). The outer upright plate (315) is located in the upright section. Between (3133) and the lower inclined plate (323), the lower inclined plate (323) is connected to the inner wall of the conical cover (322) as a whole, the lower end of the lower inclined plate (323) is connected to the outer upright plate (315), and multiple fourth dust suction holes (3231) are provided in the lower inclined plate (323). The multiple fourth dust suction holes (3231) are arranged at intervals along the axial direction of the roller (5), and the third dust suction hole (3151), the fourth dust suction hole (3231) and the dust suction chamber (321) are connected in sequence.

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