Self-adaptive regulation and control air suction cover

Abstract

The self-adaptive regulation and control air suction cover comprises an air suction cover body, a lifting mechanism driving the air suction cover body to ascend and descend and telescopic plates arranged on the four faces of the air suction cover body, and the adjacent telescopic plates are connected through flexible rubber leather. After the air suction cover descends and the telescopic plate extends, the vortex intensity of the dust collection area is obviously reduced along with the increase of the extension length, and the dust collection cover extending downwards hinders the formation of a central vortex to a certain extent, so that the dust collection effect of the dust collection cover is effectively improved, and the operation energy consumption is reduced.

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 iron-making yard is one of the main pollution sources of the iron-making plant. Slag iron will generate dust when it flows out of the iron-making hole and flows through the slag iron ditch. Each ton of iron produced can emit about 2.5kg of dust. In order to improve the working conditions of the iron-making yard and prevent the pollution of the surrounding environment by smoke and dust, a dust removal system is usually equipped. The smoke and dust generated when the blast furnace is tapped is collected by the top suction hood and the side suction port under the suction of the fan, and enters the dust collector through the pipeline for filtration. The purified air is discharged into the atmosphere through the fan and the exhaust pipe.

[0003] In order to prevent smoke and dust from escaping and improve the dust collection effect, a large sealing cover is usually built around the blast furnace tapping hole, and a suction hood is installed on the top of the sealing cover for smoke and dust collection. However, the generation of smoke and dust during the blast furnace tapping process is discontinuous and unstable, and the top fixed suction hood has poor adaptability to smoke and dust changes, resulting in insufficient suction when the smoke and dust volume is high and smoke and dust escape, and excessive suction and electricity consumption when the smoke and dust volume is low. Therefore, it is urgent to take measures to improve the suction hood's ability to adapt to smoke and dust changes. Summary of the invention

[0004] The object of the present invention is to solve the above-mentioned problem and to provide an adaptively controlled air suction hood which can adjust the up and down moving distance of the air suction hood and the telescopic length of the hood body, thereby effectively improving the dust collection effect of the dust collecting 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 lift and lower, and telescopic plates arranged on four surfaces 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 lifted and lowered in the first bracket, the air suction hood is installed 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 lifted and lowered;

[0008] The linkage mechanism includes a second bracket, a second lifting frame arranged in the second bracket and lifted in the second bracket, and a fixed plate arranged on the second lifting frame, wherein a slide groove is arranged at the lower end of the fixed plate, a support rod is arranged at the outer side of the telescopic plate, a driving wheel matched with the slide groove is arranged at the upper end of the support rod, and a connecting mechanism connecting the first lifting frame and the second lifting frame is arranged 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 rotating shaft of the synchronous pulley 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, long holes are arranged on four sides of the air suction hood, and guide wheels cooperating with the long holes are arranged 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 four surfaces 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, as the extension length increases, the eddy current intensity in the dust collecting area decreases significantly, 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 the 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

[0021] Figure 2 It is the front view of the present invention;

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

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

[0024] In the figure: air suction hood 1, telescopic plate 2, rubber leather 3, first bracket 4, first lifting frame 5, first guide sleeve 6, second bracket 7, second lifting frame 8, fixed plate 9, slide groove 10, support rod 11, driving wheel 12, synchronous pulley 13, synchronous belt 14, gear 15, rack 16, lifting hydraulic cylinder 17, cross beam 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 in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in 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 creative work 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 four surfaces of the air suction hood 1, and the adjacent telescopic plates 2 are connected by flexible rubber leathers 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 system operation resistance, and on the other hand, it will affect the dragging and suction effect of the main airflow on the 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, 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.

[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, and according to the control strategy, the automatic control system adjusts the retractable hood to a suitable height through the lifting mechanism, and adjusts the retractable hood to a suitable length; then the automatic control system adjusts 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 air 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 air suction hood 1 to descend, and at the same time, the telescopic plate 2 is extended under the action of the linkage mechanism, and as the extension length increases, the vortex intensity in the dust collecting area is significantly reduced, and the dust collecting hood extending downward hinders the formation of the central vortex to a certain extent, which effectively improves the dust collection effect of the dust collecting hood and reduces 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, a slide groove 10 is arranged at the lower end of the fixed plate 9, a support rod 11 is arranged on the outer side of the telescopic plate 2, and a driving wheel 12 matched with the slide groove 10 is arranged 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 is arranged 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 locking is prevented by setting the slide groove 10 and the driving wheel 12.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, the connection mechanism includes synchronous pulleys 13 arranged on the second bracket 7 in parallel from top to bottom 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 provided with a motor for driving the synchronous pulley to rotate, the rotating shaft of the synchronous pulley 13 at the lower end is provided with a gear 15, and the first lifting frame 5 is provided with a rack 16 meshing with the gear 15. When the first lifting frame 5 descends, under the action of the gear rack, the synchronous pulley 13 at the lower end rotates, driving the synchronous belt 14 to operate, thereby driving the second lifting frame 8 to descend, the diameter of the synchronous pulley 13 at the lower end is larger than the diameter of the synchronous pulley 13 at the upper end, ensuring that the descending distance of the first lifting frame 5 is larger than the descending distance of the second lifting frame 8, that is, as the suction hood 1 descends, the telescopic plate can be extended.

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

[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 cooperating with the columns of the second bracket 7 are provided on both sides of the second lifting frame 8 .

[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 elongated holes 22 , and the inner side of the telescopic plate 2 is provided with guide wheels 23 that cooperate with the elongated holes 22 .

[0039] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "left", "right", "up", "down", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection, it can be a direct connection, it can be an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. An adaptively controlled air suction 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 and lowered, the telescopic plate (2) is extended and retracted under the action of the 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 connection mechanism comprises synchronous pulleys (13) arranged on the second bracket (7) in parallel up and down, and a synchronous belt (14) connecting the two synchronous pulleys (13); the synchronous belt (14) is connected to a 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 suction hood according to claim 1, characterized in that: First guide sleeves (6) cooperating 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 suction 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 suction 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 suction 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 suction hood according to claim 1, characterized in that: Second guide sleeves (20) cooperating with the columns of the second bracket (7) are provided on both sides of the second lifting frame (8).

7. The self-adaptive controlled air suction 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).

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

Images