An adaptively controlled air suction hood

Abstract

The present invention discloses an adaptively controlled air suction hood, comprising an air suction hood, a lifting mechanism for driving the air suction hood to rise and fall, and telescopic plates arranged on four surfaces of the air suction hood, wherein adjacent telescopic plates are connected by flexible rubber skins; after the air suction hood descends and the telescopic plates are extended, the vortex intensity in the dust collecting area decreases significantly as the extension length increases, and the dust collecting hood extending downward hinders the formation of a central vortex to a certain extent, thereby effectively improving the dust collection effect of the dust collecting hood and reducing operating energy consumption.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace ironmaking, in particular to an adaptively controlled air suction hood. Background Art

[0002] The blast furnace tapping area is one of the main sources of pollution in an ironmaking plant. Slag and iron flow from the tapping hole and through the slag ditch, generating dust. Each ton of iron produced emits approximately 2.5 kg of dust. To improve working conditions in the tapping area and prevent dust pollution from the surrounding environment, a dust removal system is typically installed. Dust generated during blast furnace tapping is collected by the fan through the top suction hood and side suction ports. It then flows through ducts into a dust collector for filtration. The purified air is then discharged into the atmosphere through the fan and exhaust stack.

[0003] To prevent dust from escaping and improve dust collection, a large sealed enclosure is typically built around the blast furnace taphole, with a suction hood mounted on top to collect the dust. However, dust generation during the blast furnace tapping process is discontinuous and unstable, and top-mounted suction hoods have poor adaptability to fluctuating dust levels. This can lead to insufficient suction power and dust escape during high dust levels, and excessive suction and energy consumption during low dust levels. Therefore, measures are urgently needed to improve the suction hood's adaptability to fluctuating dust levels. Summary of the Invention

[0004] The purpose of the present invention is to solve the above problems and provide an adaptively controlled suction hood that can adjust the up and down moving distance of the suction hood and the telescopic length of the hood body, effectively improving the dust collection effect of the dust hood and reducing operating energy consumption.

[0005] The technical solution adopted by the present invention to solve the technical problem is:

[0006] An adaptively controlled air suction hood comprises an air suction hood, a lifting mechanism for driving the air suction hood to rise and fall, and telescopic plates arranged on four sides of the air suction hood, wherein adjacent telescopic plates are connected by flexible rubber skins;

[0007] The lifting mechanism includes a first bracket, a first lifting frame arranged in the first bracket and lifting and lowering in the first bracket, the suction hood is mounted on the first lifting frame, and the telescopic plate is extended and retracted under the action of the linkage mechanism when the first lifting frame is raised and lowered;

[0008] The linkage mechanism includes a second bracket, a second lifting frame arranged in the second bracket and lifting and lowering in the second bracket, a fixed plate arranged on the second lifting frame, a slide groove being provided at the lower end of the fixed plate, a support rod being provided on the outer side of the telescopic plate, a drive wheel being provided at the upper end of the support rod and cooperating with the slide groove, and a connecting mechanism connecting the first lifting frame and the second lifting frame being provided on the second bracket;

[0009] The connecting mechanism includes synchronous pulleys arranged in parallel on the second bracket and a synchronous belt connecting the two synchronous pulleys. The synchronous belt is connected to the guide sleeve of the second lifting frame. A gear is provided on the synchronous pulley shaft at the lower end, and a rack meshing with the gear is provided on the first lifting frame.

[0010] Furthermore, first guide sleeves cooperating with the first support columns are provided on both sides of the first lifting frame.

[0011] Furthermore, lifting hydraulic cylinders for driving the first lifting frame are provided on both sides of the first bracket.

[0012] Furthermore, cross beams are provided on both sides of the first bracket, the cylinder body end of the lifting hydraulic cylinder is connected to the cross beams, and the piston rod end of the lifting hydraulic cylinder is connected to the first lifting frame.

[0013] Furthermore, a through hole is provided in the middle of the fixing plate.

[0014] Furthermore, second guide sleeves cooperating with the second support columns are provided on both sides of the second lifting frame.

[0015] Furthermore, mounting plates are provided on both sides of the second bracket, and the synchronous pulley is mounted on the mounting plates.

[0016] Furthermore, elongated holes are provided on the four sides of the air suction hood, and guide wheels cooperating with the elongated holes are provided on the inner side of the telescopic plate.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention includes an air suction hood, a lifting mechanism for driving the air suction hood to rise and fall, and telescopic plates arranged on the four sides of the air suction hood, wherein adjacent telescopic plates are connected by flexible rubber skins; when the air suction hood descends and the telescopic plates are extended, the eddy current intensity in the dust collecting area decreases significantly as the extension length increases, and the dust collecting hood extending downward hinders the formation of a central vortex to a certain extent, thereby effectively improving the dust collection effect of the dust collecting hood and reducing operating energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is the main view of the present invention;

[0022] Figure 3 This is a schematic diagram of the lifting mechanism structure of the present invention;

[0023] Figure 4 It is a schematic structural diagram of the air suction hood of the present invention.

[0024] In the figure: suction hood 1, telescopic plate 2, rubber skin 3, first bracket 4, first lifting frame 5, first guide sleeve 6, second bracket 7, second lifting frame 8, fixed plate 9, slide 10, support rod 11, drive wheel 12, synchronous pulley 13, synchronous belt 14, gear 15, rack 16, lifting hydraulic cylinder 17, crossbeam 18, through hole 19, second guide sleeve 20, mounting plate 21, long hole 22, guide wheel 23. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0026] like Figure 1 and Figure 4 As shown, an adaptively controlled air suction hood includes an air suction hood 1, a lifting mechanism for driving the air suction hood 1 to rise and fall, and telescopic plates 2 arranged on the four sides of the air suction hood 1, and adjacent telescopic plates 2 are connected by flexible rubber skins 3; in the initial state of the air suction hood, there is an obvious vortex under the air suction hood. On the one hand, the vortex will cause flow instability and increase the operating resistance of the system. On the other hand, it will affect the dragging and suction effect of the main airflow on dust. When the dust carried by the vortex moves to the air leakage point in the dust collection area, a "dust emission" phenomenon will occur, and a large amount of dust will escape into the production space. At this time, the air volume has to be increased to increase the dust collection effect of the main airflow, and the operating power consumption increases. After the air suction hood is extended, as the extension length increases, the vortex intensity in the dust collection area decreases significantly. The dust collecting hood extending downward hinders the formation of the central vortex to a certain extent, effectively improving the dust collection effect of the dust collecting hood and reducing operating energy consumption.

[0027] The smoke sensor installed at the air inlet of the suction hood monitors the changes in the smoke concentration at the air inlet in real time, and the monitoring data is synchronously transmitted to the predictive control model of the automatic control system; the predictive control model determines the control strategy according to the smoke concentration. According to the control strategy, the automatic control system adjusts the retractable hood to the appropriate height through the lifting mechanism, and controls the retractable hood to extend to the appropriate length; then the automatic control system controls the air volume of the variable frequency fan through the frequency converter.

[0028] When the telescopic plates 2 are extended, the gaps between adjacent telescopic plates 2 are sealed by the rubber skins 3 .

[0029] like Figure 1 and Figure 3 As shown, the lifting mechanism includes a first bracket 4, a first lifting frame 5 arranged in the first bracket 4 and lifted and lowered in the first bracket 4, the suction hood 1 is installed on the first lifting frame 5, and the telescopic plate 2 is extended and retracted under the action of the linkage mechanism when the first lifting frame 5 is lifted and lowered; when the smoke concentration is large, the first lifting frame 5 drives the suction hood 1 to descend, and at the same time, the telescopic plate 2 is extended under the action of the linkage mechanism, as the extension length increases, the vortex intensity in the dust collecting area decreases significantly, and the dust collecting hood extending downward hinders the formation of the central vortex to a certain extent, effectively improving the dust collection effect of the dust collecting hood and reducing the operating energy consumption.

[0030] like Figure 1 and Figure 3 As shown, the linkage mechanism includes a second bracket 7, a second lifting frame 8 arranged in the second bracket 7 and lifted and lowered in the second bracket 7, and a fixed plate 9 arranged on the second lifting frame 8. The lower end of the fixed plate 9 is provided with a slide groove 10, and the outer side of the telescopic plate 2 is provided with a support rod 11. The upper end of the support rod 11 is provided with a driving wheel 12 that cooperates with the slide groove 10. A connecting mechanism connecting the first lifting frame 5 and the second lifting frame 8 is provided on the second bracket 7; when the second lifting frame 8 descends, the telescopic plate 2 extends downward under the action of the slide groove 10 and the driving wheel 12, and the slide groove 10 and the driving wheel 12 are provided to prevent locking.

[0031] like Figure 1 、 Figure 2 and Figure 3 As shown, the connecting mechanism includes synchronous pulleys 13 arranged in parallel on the second bracket 7 and a synchronous belt 14 connecting the two synchronous pulleys 13. The synchronous belt 14 is connected to the guide sleeve of the second lifting frame 8. The second bracket 7 is equipped with a motor to drive the synchronous pulleys to rotate. The rotating shaft of the synchronous pulley 13 at the lower end is equipped with a gear 15. The first lifting frame 5 is equipped with a rack 16 that meshes with the gear 15. When the first lifting frame 5 descends, the lower synchronous pulley 13 rotates under the action of the gear rack, driving the synchronous belt 14 to operate, thereby driving the second lifting frame 8 to descend. The diameter of the lower synchronous pulley 13 is larger than that of the upper synchronous pulley 13, ensuring that the distance the first lifting frame 5 descends is less than the distance the second lifting frame 8 descends. That is, as the suction hood 1 descends, the telescopic plate can be extended.

[0032] like Figure 3 As shown, first guide sleeves 6 are provided on both sides of the first lifting frame 5 to cooperate with the columns of the first bracket 4.

[0033] like Figure 3As shown, lifting hydraulic cylinders 17 for driving the first lifting frame 5 are provided on both sides of the first bracket 4 .

[0034] like Figure 3 As shown, cross beams 18 are provided on both sides of the first bracket 4 , the cylinder end of the lifting hydraulic cylinder 17 is connected to the cross beam 18 , and the piston rod end of the lifting hydraulic cylinder 17 is connected to the first lifting frame 5 .

[0035] like Figure 1 As shown, a through hole 19 is provided in the middle of the fixing plate 9 to facilitate the passage of the negative pressure pipe.

[0036] like Figure 1 As shown, second guide sleeves 20 are provided on both sides of the second lifting frame 8 to cooperate with the columns of the second bracket 7.

[0037] like Figure 1 As shown, mounting plates 21 are provided on both sides of the second bracket 7 , and the synchronous pulley 13 is mounted on the mounting plates 21 .

[0038] like Figure 4 As shown, the four sides of the air suction hood 1 are provided with long holes 22, and the inner side of the telescopic plate 2 is provided with guide wheels 23 that cooperate with the long holes 22.

[0039] In the description of the present invention, it should be noted that the terms "left", "right", "up", "down", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

Claims

1. An adaptively controlled air hood, characterized in that: It comprises an air suction hood (1), a lifting mechanism for driving the air suction hood (1) to rise and fall, and telescopic plates (2) arranged on four surfaces of the air suction hood (1), wherein adjacent telescopic plates (2) are connected via flexible rubber skins (3); The lifting mechanism comprises a first bracket (4), a first lifting frame (5) arranged in the first bracket (4) and lifting and lowering in the first bracket (4), the air suction hood (1) is mounted on the first lifting frame (5), and when the first lifting frame (5) is lifted or lowered, the telescopic plate (2) is extended or retracted under the action of a linkage mechanism; The linkage mechanism comprises a second bracket (7), a second lifting frame (8) arranged in the second bracket (7) and lifted and lowered in the second bracket (7), a fixed plate (9) arranged on the second lifting frame (8), a slide groove (10) being provided at the lower end of the fixed plate (9), a support rod (11) being provided on the outer side of the telescopic plate (2), a driving wheel (12) cooperating with the slide groove (10) being provided at the upper end of the support rod (11), and a connecting mechanism connecting the first lifting frame (5) and the second lifting frame (8) being provided on the second bracket (7); The connecting mechanism comprises a synchronous pulley (13) arranged on the second bracket (7) in parallel above and below and a synchronous belt (14) connecting the two synchronous pulleys (13); the synchronous belt (14) is connected to the guide sleeve of the second lifting frame (8); a gear (15) is provided on the rotating shaft of the synchronous pulley (13) at the lower end; and a rack (16) meshing with the gear (15) is provided on the first lifting frame (5).

2. The self-adaptive controlled air hood according to claim 1, characterized in that: First guide sleeves (6) that cooperate with the columns of the first bracket (4) are provided on both sides of the first lifting frame (5).

3. The self-adaptive controlled air hood according to claim 2, characterized in that: Lifting hydraulic cylinders (17) for driving the first lifting frame (5) are provided on both sides of the first bracket (4).

4. The self-adaptive controlled air hood according to claim 3, characterized in that: Crossbeams (18) are provided on both sides of the first bracket (4); the cylinder end of the lifting hydraulic cylinder (17) is connected to the crossbeam (18); and the piston rod end of the lifting hydraulic cylinder (17) is connected to the first lifting frame (5).

5. The self-adaptive controlled air hood according to claim 1, characterized in that: A through hole (19) is provided in the middle of the fixing plate (9).

6. The self-adaptive controlled air hood according to claim 1, characterized in that: Mounting plates (21) are provided on both sides of the second bracket (7), and the synchronous pulley (13) is mounted on the mounting plates (21).

7. The self-adaptive controlled air hood according to claim 1, characterized in that: The four surfaces of the air suction cover (1) are all provided with elongated holes (22), and the inner side of the telescopic plate (2) is provided with guide wheels (23) that match the elongated holes (22).

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