CN215466637U

CN215466637U - Dust removal device in rack for hot rolling temper mill

Info

Publication number: CN215466637U
Application number: CN202120858575.2U
Authority: CN
Inventors: 祝翠荣; 夏定玲; 安甲乙; 李张翼
Original assignee: Wisdri Engineering and Research Incorporation Ltd
Current assignee: Wisdri Engineering and Research Incorporation Ltd
Priority date: 2021-04-25
Filing date: 2021-04-25
Publication date: 2022-01-11
Anticipated expiration: 2031-04-25

Abstract

The utility model provides a dust removal device in a frame for a hot rolling temper mill, which comprises a first blowing mechanism and a first suction mechanism which are positioned on the inlet side of the temper mill, and a second blowing mechanism and a second suction mechanism which are positioned on the outlet side of the temper mill; the first blowing mechanism is positioned between the upper working roll and the lower working roll, and the blowing direction of the first blowing mechanism faces to the gap between the upper working roll and the lower working roll; the second purging mechanism is positioned between the upper working roll and the lower working roll and between the upper working roll and the upper supporting roll, and the purging direction of the second purging mechanism faces to the gap between the upper working roll and the lower working roll and the gap between the upper working roll and the upper supporting roll. The utility model discloses a position and mechanism according to rolling in-process production iron scale dust, arrange the mechanism that sweeps in the last working roll and last supporting roll, the lower working roll gap department of the upper and lower working roll gap and the outlet side of levelling machine entrance side to adopt the combination mode of blowing and sucking, clear up the iron scale dust, dust removal effect is good, has improved belted steel surface quality.

Description

Dust removal device in rack for hot rolling temper mill

Technical Field

The utility model belongs to the technical field of hot rolling leveling, and particularly relates to a dust removal device in a rack for a hot rolling leveling machine.

Background

The hot rolling leveling can improve the structure of a hot rolled product, effectively eliminate the yield platform of the strip steel, improve the plate shape and the surface quality and improve the competitiveness of a hot rolled plate strip product. In the process of planishing and rolling the surface of the strip steel, oxides on the surface of the strip steel can be separated from a strip steel matrix and fall off, which can be verified by observing black powder on equipment in a stand, so that a dust removal device is required to be arranged at the stand of a common hot rolling planishing unit.

The frame dust removing device of the existing hot rolling planishing mill is generally arranged at an inlet and an outlet of a frame, and part of machine sets are limited by investment, equipment arrangement conditions and the like. However, in terms of practical use effect, the dust collection port is difficult to be in close contact with the strip steel, and the practical dust removal effect is not ideal.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a dust removal device in a frame for a hot rolling temper mill, which adopts a blowing and sucking combined mode according to the position and mechanism of iron scale dust generated in the rolling process to improve the dust removal effect.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a dust removal device in a frame for a hot rolling planishing mill comprises a first blowing mechanism and a first suction mechanism which are positioned on the inlet side of the planishing mill, and a second blowing mechanism and a second suction mechanism which are positioned on the outlet side of the planishing mill; the first blowing mechanism is positioned between the upper working roll and the lower working roll on the inlet side of the temper mill, and the blowing direction of the first blowing mechanism faces to a gap between the upper working roll and the lower working roll; the second purging mechanism is located between the upper working roll and the lower working roll on the outlet side of the temper mill and between the upper working roll and the upper supporting roll, and the purging direction of the second purging mechanism faces to a gap between the upper working roll and the lower working roll and a gap between the upper working roll and the upper supporting roll.

Further, the first mechanism of sweeping includes that the twice sweeps the roof beam, sets up respectively in the upper and lower work roll gap department of levelling machine entrance side, sweep roof beam and work roll axis parallel arrangement, it is the tuyere that is in line and interval distribution to be equipped with a plurality of on the roof beam to sweep, the air current that sweeps each tuyere on the roof beam sweeps the direction and is followed the work roll gap direction by corresponding work roll middle part to both ends.

Further, the second sweeps the mechanism and includes that the three is swept the roof beam, sets up respectively in the upper and lower work roll gap and the last supporting roll gap department of levelling machine outlet side, sweep roof beam and work roll axis parallel arrangement, it is the tuyere that is in the row and interval distribution to be equipped with a plurality of on the roof beam to sweep, the air current that sweeps each tuyere on the roof beam sweeps the direction and is by corresponding roll gap middle part to both ends along the roll gap direction.

Further, the first and second purging mechanisms each cover the corresponding roll arrangement over the full width of their purging range.

Furthermore, the dust removal device in the frame for the hot rolling planisher further comprises an inlet dust collection cover and an outlet dust collection cover which are respectively arranged on the inlet side and the outlet side of the planisher, the inlet dust collection cover covers the roll gaps of the upper working roll and the lower working roll, the first blowing mechanism is installed inside the inlet dust collection cover, an inlet channel for strip steel to pass through is formed in the inlet dust collection cover, the outlet dust collection cover covers the roll gaps of the upper working roll and the lower working roll and the roll gaps of the upper working roll and the upper supporting roll, the second blowing mechanism is installed inside the outlet dust collection cover, and an outlet channel for strip steel to pass through is formed in the outlet dust collection cover.

Furthermore, one side of the inlet dust hood, which is close to the roll surface of the working roll, is provided with two sections of connected arc-shaped guide plates, the shapes of the two sections of arc-shaped guide plates are respectively matched with the roll surfaces of the upper working roll and the lower working roll, and the arc-shaped guide plates of each section are opposite to the corresponding roll surface and are arranged with a certain gap with the roll surface.

Furthermore, one side of the outlet dust collection hood, which is close to the roller surface, is provided with three sections of arc-shaped guide plates which are sequentially connected from top to bottom, the shapes of the three sections of arc-shaped guide plates are respectively matched with the roller surfaces of the upper supporting roller, the upper working roller and the lower working roller, and the arc-shaped guide plates of all the sections are just opposite to the corresponding roller surfaces and are arranged with a certain gap between the arc-shaped guide plates and the roller surfaces.

Furthermore, the inlet dust collecting cover and the outlet dust collecting cover are both connected with telescopic hydraulic cylinders which drive the dust collecting covers to be close to or far away from the roller surface.

Further, the first suction mechanism and the second suction mechanism are respectively connected to the inlet dust collection cover and the outlet dust collection cover.

Further, the first suction mechanism and the second suction mechanism comprise a negative pressure suction dust collection header and a negative pressure controller for adjusting the intensity of the negative pressure in the negative pressure suction dust collection header.

Compared with the prior art, the utility model has the beneficial effects that:

(1) according to the position and mechanism of iron scale dust generated in the rolling process, the dust removal device in the frame of the hot rolling temper mill provided by the utility model arranges the blowing mechanisms at the roll gaps of the upper and lower working rolls at the inlet side of the temper mill and the roll gaps of the upper working roll, the upper supporting roll and the lower working roll at the outlet side of the temper mill, and adopts a blowing and sucking combined mode to clean the iron scale dust, so that the dust removal effect is good, and the surface quality of strip steel is improved.

(2) According to the dust removal device in the rack for the hot rolling temper mill, the dust collection covers are arranged at the positions where iron oxide scale dust is easily generated at the inlet side and the outlet side of the temper mill, so that the swept dust falls into the dust collection covers, closed dust collection is realized, and the dust removal effect is further improved.

The present invention will be described in further detail below with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view showing the construction of a dust removing device in a frame for a hot rolling leveler according to the present invention;

FIG. 2 is a schematic view of the structure of a purge beam according to the present invention.

Description of reference numerals: 1. an upper supporting roller; 2. an upper work roll; 3. a first purge mechanism; 4. an inlet dust cage; 5. a telescopic hydraulic cylinder; 6. a first suction mechanism; 7. a lower working roll; 8. a lower support roll; 9. a second pumping mechanism; 10; strip steel; 11. an outlet dust cage; 12. a second purging mechanism; 13. an arc-shaped guide plate; 14. a scraper; 15. a purge beam; 16. and a blast nozzle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, the meaning of "plurality" or "a plurality" is two or more unless otherwise specified.

The oxide on the surface of the strip 10 has high hardness and low ductility relative to the matrix, and during the temper rolling, the strip 10 is deformed to a certain extent, and the surface oxide is separated from the matrix of the strip and falls off due to slight difference in the elongation at each position in the thickness direction of the strip 10. According to analysis, dust at the inlet of the temper mill is concentrated at the roll gaps of the upper working roll and the lower working roll, dust at the outlet of the temper mill is collected at the roll gaps of the upper working roll and the lower working roll, the four-roll temper mill can be brought into the roll gaps of the upper working roll and the upper supporting roll along the rotation direction of the roll system, and the six-roll temper mill is brought into the roll gaps of the upper working roll and the upper middle roll. Based on this, the present embodiment provides an in-frame dust removing device for a hot rolling temper mill, taking a four-roll temper mill as an example, as shown in fig. 1, comprising a first purging mechanism 3 and a first suction mechanism 6 located at the inlet side of the temper mill, and a second purging mechanism 12 and a second suction mechanism 9 located at the outlet side of the temper mill; the first blowing mechanism 3 is positioned between the upper working roll 2 and the lower working roll 7 on the inlet side of the temper mill, and the blowing direction of the first blowing mechanism 3 faces to the gap between the upper working roll 2 and the lower working roll 7; the second purging mechanism 12 is positioned between the upper working roll 2 and the lower working roll 7 on the outlet side of the temper mill and between the upper working roll 2 and the upper supporting roll 1, and the purging direction of the second purging mechanism 12 faces the gap between the upper working roll 2 and the lower working roll 7 and the gap between the upper working roll 2 and the upper supporting roll 1. In the embodiment, according to the position and mechanism of the iron scale dust generated in the rolling process, the purging mechanism and the sucking mechanism are arranged at the position close to the roll gap of the strip steel 10, and the iron scale dust generated near the strip steel 10 is cleaned in a blowing and sucking combined mode, so that the influence of the dust on the surface quality of the strip steel 10 is reduced.

The scraper 14 is arranged on the roll surface of the upper supporting roll 1 and the lower supporting roll 8, blades of the scraper 14 are arranged against the rotating direction of the roll system, the pneumatic system is adopted for driving, the scraper is opened periodically, and the scraper is used for cleaning and scraping off the dirt on the roll surface so as to reduce the risk that the dirt on the roll surface is copied to each roll surface and then is transferred to the surface of the strip steel 10 due to the roll changing period of the supporting rolls.

In a specific embodiment, the first blowing mechanism 3 comprises two blowing beams 15 which are respectively arranged at the roll gaps of the upper working roll 2 and the lower working roll 7 on the inlet side of the temper mill and are used for blowing the upper surface and the lower surface of the strip steel 10 on the inlet side of the temper mill so as to prevent dust from floating on the strip steel 10; the second purging mechanism 12 comprises three purging beams 15 which are respectively arranged at the roll gaps of the upper working roll 2 and the lower working roll 7 on the outlet side of the temper mill and the roll gaps of the upper working roll 2 and the upper supporting roll 1, the roll gaps of the upper working roll and the lower working roll on the outlet side are arranged on the same inlet side of the design principle of the purging beams 15, meanwhile, one purging beam 15 is arranged at the roll gaps of the upper supporting roll 1 and the upper working roll 2 for preventing dust from rising, and the purging beams 15 on the inlet side and the outlet side of the temper mill are arranged in parallel with the axis of the working rolls; specifically, as shown in fig. 2, a plurality of air nozzles 16 are arranged on the purging beam 15 in a straight row and are distributed at intervals, the overlapping amount of air curtains of the air nozzles on the purging beam 15 can be properly reduced, and the air flow purging direction of each air nozzle 16 on the purging beam 15 is along the roll gap direction from the middle part of the corresponding roll gap to the two ends, so that dust can be blown off from the middle part to the two sides along the roll gap direction, and the dust is sucked away by the corresponding suction mechanism on the inlet side and the outlet side of the leveling machine. Optimally, in order to further ensure that dust is swept away from the surface of the strip steel 10, the first sweeping mechanism 3 and the second sweeping mechanism 12 are arranged to cover the corresponding rollers with the full width of the sweeping range thereof so that the sweeping range thereof meets the maximum width of the strip steel; and according to the width of the strip steel, the purging beam 15 can be divided into a middle section and an edge section, the middle section and the two edge sections are respectively provided with an air inlet pipeline, the number of the air nozzles 16 of the purging beam 15 is optimally selected, and the air nozzles 16 are not required to be opened completely, so that the consumption of compressed air is reduced.

In an optimized implementation mode, the dust removing device in the frame for the hot rolling planisher further comprises an inlet dust hood 4 and an outlet dust hood 11 which are respectively arranged at the inlet side and the outlet side of the planisher, the inlet dust hood 4 is close to the roll surface and covers the roll gaps of the upper working roll 2 and the lower working roll 7, the first blowing mechanism 3 is arranged in the inlet dust hood 4, and an inlet channel for strip steel 10 to pass through is formed in the inlet dust hood 4; the outlet dust hood 11 is also close to the roller surface and covers the roller gaps of the upper and lower working rollers and the roller gaps of the upper working roller 2 and the upper supporting roller 1, the second purging mechanism 12 is installed inside the outlet dust hood 11, and an outlet passage for the strip steel 10 to pass through is formed in the outlet dust hood 11. When the device works normally, the planisher starts five purging beams 15 on the inlet side and the outlet side of the planisher in a planishing and rolling mode, dust generated in the planishing process is blown up through purging, the dust is prevented from falling to the surface of the strip steel 10, meanwhile, the inlet dust hood 4 and the outlet dust hood 11 are closed due to the upper portion and the lower portion of the inlet dust hood and the lower portion of the outlet dust hood, and the blown-up dust is sucked away by a suction mechanism in the corresponding dust hoods, so that closed dust collection is realized, and the dust collection effect on the inlet side and the outlet side of the planisher is further improved. And because the inlet dust-collecting hood 4 and the outlet dust-collecting hood 11 are both provided with passages for the strip steel 10 to pass through, the arrangement of the dust-collecting hoods does not influence the normal production of the strip steel.

Specifically, the first suction mechanism 6 and the second suction mechanism 9 are connected to the inlet dust cage 4 and the outlet dust cage 11, respectively. The first suction mechanism 6 and the second suction mechanism 9 both comprise a negative pressure suction dust collection header and a negative pressure controller for adjusting the intensity of the negative pressure in the negative pressure suction dust collection header.

Furthermore, one side of the inlet dust hood 4 close to the roller surface of the working roller is provided with two sections of connected arc-shaped guide plates 13, the shapes of the two sections of arc-shaped guide plates 13 are respectively matched with the roller surfaces of the upper working roller and the lower working roller, and each section of arc-shaped guide plate 13 is over against the corresponding roller surface and is arranged with a certain gap with the roller surface; the outlet dust collection hood 11 is provided with three sections of arc guide plates 13 which are sequentially connected from top to bottom on one side close to the roller surface, the shapes of the three sections of arc guide plates 13 are respectively matched with the roller surfaces of the upper supporting roller 1, the upper working roller 2 and the lower working roller 7, and the arc guide plates 13 of each section are over against the corresponding roller surface and are arranged with a certain gap between the arc guide plates and the roller surface. Through design arc guide plate 13 on entry dust cage 4 and export dust cage 11 for the dust cage can be closer to the roller face and arrange, thereby can suck away the dust on the roller face, and the compressed air who thoughtlessly has the dust that sweeps the production simultaneously also can be leading-in to the dust cage through this arc guide plate 13, draws away the dust through suction mechanism, has effectively avoided sweeping the air current field and has formed the turbulent flow under the influence of reflecting air current, has further improved dust removal effect.

Preferably, the inlet dust hood 4 and the outlet dust hood 11 are both connected with a telescopic hydraulic cylinder 5 for driving the dust hood to be close to or far away from the roller surface, the telescopic hydraulic cylinder 5 is used for driving the dust hood to retreat to a safe position during roller change or maintenance, and the dust hood is pushed to a position close to the roller surface during normal work, so that a closed dust collection effect is realized.

In conclusion, according to the position and mechanism of iron scale dust generated in the rolling process, the dust removal device in the frame for the hot rolling temper mill is characterized in that the blowing mechanisms are arranged at the roll gaps of the upper working roll and the lower working roll on the inlet side of the temper mill and the roll gaps of the upper working roll, the upper supporting roll and the lower working roll on the outlet side of the temper mill, the iron scale dust is cleaned in a blowing and sucking combined mode, closed dust removal is achieved through the arrangement of the dust collection cover, the dust removal effect is improved, and the influence of dust on the surface quality of strip steel is reduced.

The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the utility model, which is intended to be covered by the claims and any design similar or equivalent to the scope of the utility model.

Claims

1. A dust removal device in a frame for a hot rolling planishing mill is characterized by comprising a first blowing mechanism and a first suction mechanism which are positioned on the inlet side of the planishing mill, and a second blowing mechanism and a second suction mechanism which are positioned on the outlet side of the planishing mill; the first blowing mechanism is positioned between the upper working roll and the lower working roll on the inlet side of the temper mill, and the blowing direction of the first blowing mechanism faces to a gap between the upper working roll and the lower working roll; the second purging mechanism is located between the upper working roll and the lower working roll on the outlet side of the temper mill and between the upper working roll and the upper supporting roll, and the purging direction of the second purging mechanism faces to a gap between the upper working roll and the lower working roll and a gap between the upper working roll and the upper supporting roll.

2. The dust removing device in a frame of a hot rolling leveler as claimed in claim 1, wherein the first blowing mechanism includes two blowing beams respectively disposed at the roll gaps of the upper and lower work rolls on the inlet side of the leveler, the blowing beams being disposed in parallel with the axes of the work rolls, the blowing beams being provided with a plurality of air nozzles arranged in a row and spaced apart from each other, the blowing direction of the air flow of each air nozzle on the blowing beams being along the roll gap direction of the work rolls from the middle portion to both ends of the corresponding work roll.

3. The dust removing device in a frame of a hot rolling temper mill as claimed in claim 1, wherein said second purging mechanism comprises three purging beams respectively disposed at the roll gaps of the upper and lower work rolls and the upper support roll on the outlet side of the temper mill, said purging beams being disposed in parallel with the axes of the work rolls, said purging beams being provided with a plurality of air nozzles arranged in a straight line and spaced apart from each other, the air flow purging direction of each air nozzle on the purging beam being from the middle of the corresponding roll gap to both ends along the roll gap direction.

4. The in-frame dust collector for a hot rolling leveler of claim 1, wherein the first purge mechanism and the second purge mechanism each cover the corresponding roll arrangement over the full width of their purge zones.

5. The in-frame dust removing device for the hot rolling temper mill according to claim 1, further comprising an inlet dust hood and an outlet dust hood respectively disposed at an inlet side and an outlet side of the temper mill, wherein the inlet dust hood covers the roll gap arrangement of the upper working roll and the lower working roll, the first purging mechanism is installed inside the inlet dust hood, an inlet passage for the strip steel to pass through is formed in the inlet dust hood, the outlet dust hood covers the roll gap arrangement of the upper working roll and the upper supporting roll, the second purging mechanism is installed inside the outlet dust hood, and an outlet passage for the strip steel to pass through is formed in the outlet dust hood.

6. The dust collector in a frame of a hot rolling temper mill as claimed in claim 5, wherein said inlet dust cage is provided with two connected arc deflectors on a side close to the roll surface of the working roll, the two arc deflectors are respectively matched with the roll surfaces of the upper and lower working rolls in shape, and each arc deflector is opposite to the corresponding roll surface and is arranged with a certain gap with the roll surface.

7. The dust collector in a frame of a hot rolling temper mill as claimed in claim 5, wherein said outlet dust cage is provided with three consecutive arc deflectors from top to bottom on the side close to the roll surface, the shape of said three arc deflectors is matched with the roll surfaces of the upper supporting roll, the upper working roll and the lower working roll, and each arc deflector faces the corresponding roll surface with a certain gap therebetween.

8. The in-frame dust removing apparatus for a hot rolling leveler of claim 5, wherein a telescopic hydraulic cylinder for driving the dust cage toward or away from the roll surface is connected to each of the inlet dust cage and the outlet dust cage.

9. The in-frame dust removing apparatus for a hot rolling leveler of claim 5, wherein the first suction means and the second suction means are connected to the inlet dust cage and the outlet dust cage, respectively.

10. The in-frame dust removing apparatus for a hot rolling leveler as set forth in claim 1 or 9, wherein the first suction means and the second suction means each comprise a suction manifold, and a suction controller for adjusting the intensity of the suction in the suction manifold.