Multi-station LF (Ladle Furnace) movable dust removal device for limited space and system thereof

Abstract

The utility model provides a multi-station LF (Ladle Furnace) movable dust removal device for a limited space and a system thereof. The multi-station LF refining furnace movable dust removal device for the limited space comprises a movable dust removal cover, a high rail and a low rail, the high rail and the low rail are supported on the two sides of the lower portion of the movable dust removal cover, idler wheels of the movable dust removal cover are provided with a walking motor in a matched mode, and the lower portion of the high rail and the lower portion of the low rail are supported through a high rail beam and a low rail beam respectively. The low track beam is of an I-shaped structure, the left end and the right end of the high track beam are of an I-shaped structure, and the middle of the high track beam comprises an upper panel and a lower panel which are oppositely arranged, at least two web plates located between the upper panel and the lower panel, and reinforcing plates located on the two sides of the upper panel and the lower panel. According to the movable dust removal device, the space above the highest position of the electrode cross arm and below the cab of the crane is fully utilized, the situation that the upper space is insufficient during dust removal transformation of an old plant can be solved, the plant does not need to be heightened, and the transformation cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgy, in particular to a mobile dust removal device for a multi-station LF refining furnace in a confined space and a system thereof. Background Art

[0002] During the production process of LF refining furnace, a large amount of synthetic slag, submerged arc slag and alloy materials need to be added. During smelting, under the action of electric arc, bubbles such as CO and CO2 generated by carbon oxidation in the charge quickly float up in the molten steel, accompanied by a large acceleration, carrying metal and slag particles and sucking the surrounding air upward; at the same time, the added alloy material contains a large amount of dust, which rises rapidly under the action of high-temperature airflow, forming a large amount of smoke.

[0003] Most of the smoke in the furnace is collected by the fourth dust removal hole set on the furnace cover body and enters the dust removal pipeline to be sucked away by the dust removal fan. A small part of the smoke will overflow from the gap between the furnace cover refractory ring and the electrode or the feeding hole, especially in the initial stage of electrode heating and alloy feeding process. After adding the alloy, the amount of smoke in the furnace will surge and a large amount of smoke will overflow. The high-temperature dust smoke will rise and spread rapidly and be discharged in an unorganized manner, seriously polluting the workshop environment. The dust concentration at the operator's post in front of the furnace exceeds the standard and does not meet the requirements of occupational health. Dust escapes outside the factory, polluting the atmospheric environment, and cannot meet the increasingly stringent environmental protection requirements of steel enterprises.

[0004] At present, in response to the dust overflow of the LF refining furnace with double-treatment stations of electrode rotation mentioned above, most of them adopt the later installation of mobile closed hoods to collect smoke and dust, which has the following disadvantages: During the production process of switching stations of the multi-station LF refining furnace, the electrode cross arm needs to rise and be at the highest position (rising stroke ~4.9m) before rotating and switching stations. In order to avoid the collision of the electrode cross arm with the top suction hood track beam during the rising and rotating process, the top suction hood and the top suction hood track need to be set relatively high. The top suction hood also needs to avoid the crane (including the driver's cab) above the LF refining furnace for regular replacement of electrodes, that is, the top suction hood and the top suction hood track should be in the space above the highest position of the electrode cross arm and below the crane driver's cab. Therefore, there are strict requirements on the height of the crane and the height space in the factory building.

[0005] However, with the country's increasingly stringent environmental protection policies for the steel industry, many old factories need to undergo environmental protection renovations. However, due to the overall height of the factory buildings, the currently common top suction hoods of this type often cannot meet the adaptability requirements of the limited height space above the LF refining furnace in the old factory area, limiting the old factory buildings from meeting the country's ultra-low emission policy requirements. Utility Model Content

[0006] The main purpose of the utility model is to provide a mobile dust removal device and system for a multi-station LF refining furnace in a confined space, aiming to meet the needs of adaptively transforming and installing a dust cover in the limited height space above the LF refining furnace in an old plant area.

[0007] To achieve the above-mentioned purpose, the utility model provides a mobile dust removal device for a multi-station LF refining furnace in a confined space, comprising at least two mobile dust removal hoods and a high track and a low track supported on both sides below the mobile dust removal hood, the rollers of the mobile dust removal hood are equipped with a travel motor, the high track and the low track are supported below by a high track beam and a low track beam respectively, the low track beam is an I-shaped structure, the left and right ends of the high track beam are I-shaped structures, and the middle part of the high track beam comprises an upper panel and a lower panel that are relatively arranged, at least two webs located between the upper panel and the lower panel, and reinforcing plates located on both sides of the upper panel and the lower panel.

[0008] Preferably, the reinforcing plate includes an upper reinforcing plate and a lower reinforcing plate, and a connecting side plate connecting one side of the upper reinforcing plate and the lower reinforcing plate, and the connecting side plate connects one side of the upper panel and the lower panel.

[0009] Preferably, the bottom end surface of the connecting side plate is flush with the bottom end surface of the lower panel, and the top end surface of the connecting side plate protrudes above the upper panel.

[0010] Preferably, the thickness of the track body formed by the upper panel and the lower panel is 180 mm to 200 mm, and the thickness of the low track beam is 480 mm to 500 mm.

[0011] Preferably, an anti-falling mechanism is provided above the movable dust removal hood.

[0012] Preferably, the anti-falling mechanism includes a hoisting track located above and a moving trolley installed on the hoisting track, the moving trolley is connected to the mobile dust hood through a pull rod, and the moving trolley is equipped with moving wheels.

[0013] Preferably, the anti-fall mechanism further comprises a braking rack located on the side of the moving wheel and a braking claw fixed to one side of the moving wheel, a sliding groove is provided on the side of the braking rack, and a free end of the braking claw extends into the sliding groove.

[0014] Preferably, brake racks are provided on both sides of the moving trolley, and the moving trolley is provided with two moving wheels corresponding to the two brake racks.

[0015] Preferably, the mobile dust removal hood is equipped with a dust removal air duct; and vehicle stops are provided at the ends of the high track and the low track.

[0016] The utility model further proposes a mobile dust removal system for a multi-station LF refining furnace for a confined space, comprising the mobile dust removal device for a multi-station LF refining furnace for a confined space, and also comprising a control device connected thereto.

[0017] The utility model proposes a mobile dust removal device for a multi-station LF refining furnace for a confined space. By adopting ordinary track beam structures (i.e., I-beam structures) on both sides of the high track beam and adopting a new structural design for the middle section of the track beam, the lifting height of the motor cross arm under the track beam can be effectively reduced while ensuring that the upper elevation of the mobile top suction hood remains unchanged. The space above the highest position of the electrode cross arm and under the crane driver's cab can be fully utilized, thereby solving the problem of insufficient upper space during dust removal renovation of old factory buildings. There is no need to raise the height of the factory building, which saves money for the construction unit and reduces the renovation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the utility model of a mobile dust removal device for a multi-station LF refining furnace for a confined space;

[0019] Figure 2 It is a left-side structural schematic diagram of a mobile dust removal device for a multi-station LF refining furnace for a confined space of the utility model;

[0020] Figure 3 It is a top view structural schematic diagram of a mobile dust removal device for a multi-station LF refining furnace for a confined space of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the middle part of the high track in the mobile dust removal device for a multi-station LF refining furnace for a confined space of the utility model;

[0022] Figure 5 It is a structural schematic diagram of the high rail end and the low rail beam in the mobile dust removal device of the multi-station LF refining furnace for confined space of the utility model;

[0023] Figure 6 It is a structural schematic diagram of the anti-falling mechanism in the mobile dust removal device of the multi-station LF refining furnace for confined space of the utility model.

[0024] In the figure, 1-dust removal duct; 2-first movable dust removal hood; 3-second movable dust removal hood; 4-third movable dust removal hood; 5-high track; 6-low track; 7-high track beam; 71-middle part of high track beam; 72-end part of high track beam; 701-upper panel; 702-lower panel; 703-web 703; 704-upper reinforcement plate; 705-lower reinforcement plate; 706-connecting side plate; 8-low track beam; 9-crane driver's cab; 10-electrode cross arm; 11-travel motor; 12-brake rack; 13-moving trolley; 14-brake claw; 15-pull rod.

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] It should be noted that in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships 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, 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, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] The utility model provides a mobile dust removal device for a multi-station LF refining furnace used in a confined space.

[0029] Reference Figures 1 to 5 In the preferred embodiment, a mobile dust removal device for a multi-station LF refining furnace for a confined space includes at least two mobile dust hoods and a high track and a low track supported on both sides of the lower side of the mobile dust hood. The rollers of the mobile dust hood are equipped with a travel motor 11. The lower sides of the high track and the low track are supported by a high track beam 7 and a low track beam 8 respectively. The low track beam 8 is an I-shaped structure. The left and right ends of the high track beam 7 are I-shaped structures. The middle part of the high track beam 7 includes an upper panel 701 and a lower panel 702 that are relatively arranged, at least two webs 703 located between the upper panel 701 and the lower panel 702 (the web 703 can be fixedly connected to the upper panel 701 and the lower panel 702 by welding), and reinforcing plates located on both sides of the upper panel 701 and the lower panel 702.

[0030] Specifically, in this embodiment, three sets of mobile dust hoods are provided on the track as an example. Each mobile dust hood has four rollers, and each mobile dust hood is equipped with two travel motors 11 and a positioning device (one for each high and low track). In the daily production process, the three mobile top suction hoods are respectively located at the three stations B, C, and D (such as Figure 1As shown), if the electrode needs to be replaced at station B, the first movable dust hood 2 can be moved to station A; if the electrode needs to be replaced at station D, the three movable dust hoods need to be moved to stations A, B, and C respectively. If the actual production conditions permit, only the third movable dust hood 4 can be moved to the right to station E (not shown in the figure), while the first movable dust hood 2 and the second movable dust hood 3 remain stationary to replace the electrode at station D.

[0031] Specifically, refer to Figure 4 This embodiment proposes a specific structure of a reinforcing plate: the reinforcing plate includes an upper reinforcing plate 704 and a lower reinforcing plate 705, and a connecting side plate 706 (which can be welded) connecting one side of the upper reinforcing plate 704 and the lower reinforcing plate 705, and the connecting side plate 706 connects one side of the upper panel 701 and the lower panel 702.

[0032] Specifically, the bottom end surface of the connecting side plate 706 is flush with the bottom end surface of the lower panel 702 , and the top end surface of the connecting side plate 706 protrudes above the upper panel 701 .

[0033] In this embodiment, the thickness of the track body formed by the upper panel 701 and the lower panel 702 is 180mm-200mm, and the thickness of the low track beam 8 is 480mm-500mm. Therefore, the thickness of the high track beam 7 is greatly reduced compared with the low track beam 8, thus solving the problem of insufficient upper space during dust removal renovation of old factory buildings without the need to raise the height of the factory buildings.

[0034] Furthermore, an anti-falling mechanism is provided above the mobile dust hood.

[0035] Reference Figure 6 The present embodiment proposes a specific structure of an anti-falling mechanism: the anti-falling mechanism includes a hoisting track located above and a moving trolley 13 installed on the hoisting track. The moving trolley 13 is connected to the mobile dust hood through a pull rod 15, and the moving trolley 13 is equipped with moving wheels.

[0036] Furthermore, the anti-fall mechanism also includes a brake rack 12 located on the side of the moving wheel and a brake claw 14 fixed to one side of the moving wheel. A slide groove is opened on the side of the brake rack 12, and the free end of the brake claw 14 extends into the slide groove.

[0037] Specifically, brake racks 12 are provided on both sides of the moving trolley 13 , and the moving trolley 13 is provided with two moving wheels corresponding to the two brake racks 12 , thereby further improving the stability of the overall structure.

[0038] During normal operation, the brake claws 14 on both sides of the moving trolley 13 pass through the safety gap of the brake rack 12, which will not affect the operation of the moving trolley 13 and the mobile dust hood. When the mobile dust hood accidentally falls off, the brake claws 14 will be stuck on the brake rack 12, thereby preventing the mobile dust hood from falling and injuring people.

[0039] Further, the mobile dust hood is equipped with a dust removal air duct 1. The ends of the high track and the low track are provided with a car stopper to limit the maximum moving position of the mobile dust hood, thereby preventing the mobile dust hood from falling off at the end.

[0040] The mobile dust removal device for a multi-station LF refining furnace for a confined space proposed in this embodiment adopts a common rail beam structure (i.e., an I-beam structure) on both sides of the high rail beam 7, and adopts a new structural design for the middle section of the rail beam. While ensuring that the top elevation of the high rail of the mobile top suction hood remains unchanged, the bottom elevation of the high rail beam 7 directly above the electrode cross arm 10 is raised, which can effectively increase the land to reserve a rising space (~298mm) for the electrode cross arm 10, and while ensuring that the upper elevation of the mobile top suction hood remains unchanged, it can effectively reduce the lifting height of the motor cross arm below the rail beam, and can make full use of the space above the highest position of the electrode cross arm 10 and below the crane driver's cab, thereby solving the problem of insufficient upper space during the dust removal renovation of the old factory building, without the need to raise the factory building, saving funds for the construction unit and reducing the renovation cost. At the same time, the mobile dust removal device for a multi-station LF refining furnace for a confined space also has the advantages of simple structure and stable and reliable operation.

[0041] The utility model also provides a mobile dust removal system for a multi-station LF refining furnace in a confined space.

[0042] In this preferred embodiment, a mobile dust removal system for a multi-station LF refining furnace for a confined space includes a mobile dust removal device for a multi-station LF refining furnace for a confined space, and also includes a control device connected thereto. The control device is electrically connected to the travel motor 11 to control its start-up. The specific structure and beneficial effects of the mobile dust removal device for a multi-station LF refining furnace for a confined space refer to the above embodiment and will not be repeated here.

[0043] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A mobile dust removal device for a multi-station LF refining furnace for a confined space, characterized in that: It includes at least two mobile dust hoods and a high track and a low track supported on both sides of the bottom of the mobile dust hood. The roller of the mobile dust hood is equipped with a travel motor. The bottom of the high track and the low track are supported by a high track beam and a low track beam respectively. The low track beam is an I-shaped structure. The left and right ends of the high track beam are I-shaped structures. The middle part of the high track beam includes an upper panel and a lower panel that are relatively arranged, at least two webs located between the upper panel and the lower panel, and reinforcing plates located on both sides of the upper panel and the lower panel.

2. The mobile dust removal device for a multi-station LF refining furnace for a confined space as claimed in claim 1, characterized in that: The reinforcing plate includes an upper reinforcing plate, a lower reinforcing plate, and a connecting side plate connecting one side of the upper reinforcing plate and the lower reinforcing plate, and the connecting side plate connects one side of the upper panel and the lower panel.

3. The mobile dust removal device for a multi-station LF refining furnace for a confined space as claimed in claim 2, characterized in that: The bottom end surface of the connecting side plate is flush with the bottom end surface of the lower panel, and the top end surface of the connecting side plate protrudes above the upper panel.

4. The mobile dust removal device for a multi-station LF refining furnace for a confined space as claimed in claim 1, characterized in that: The thickness of the track body formed by the upper panel and the lower panel is 180mm~200mm, and the thickness of the low track beam is 480mm~500mm.

5. The mobile dust removal device for a multi-station LF refining furnace for a confined space as claimed in claim 1, characterized in that: An anti-falling mechanism is matchedly arranged above the movable dust removal hood.

6. The mobile dust removal device for a multi-station LF refining furnace for a confined space as claimed in claim 5, characterized in that: The anti-falling mechanism comprises a hoisting track located above and a moving trolley installed on the hoisting track. The moving trolley is connected to the mobile dust removal hood through a pull rod, and the moving trolley is equipped with moving wheels.

7. The mobile dust removal device for a multi-station LF refining furnace for a confined space as claimed in claim 6, characterized in that: The anti-falling mechanism also includes a braking rack located on the side of the moving wheel and a braking claw fixed to one side of the moving wheel. A sliding groove is opened on the side of the braking rack, and the free end of the braking claw extends into the sliding groove.

8. The mobile dust removal device for a multi-station LF refining furnace for a confined space as claimed in claim 7, characterized in that: Braking racks are arranged on both sides of the moving trolley, and the moving trolley is provided with two moving wheels corresponding to the two braking racks.

9. The mobile dust removal device for a multi-station LF refining furnace for a confined space according to any one of claims 1 to 8, characterized in that: The movable dust removal hood is equipped with a dust removal air duct; and vehicle stops are arranged at the ends of the high track and the low track.

10. A mobile dust removal system for a multi-station LF refining furnace for confined space, characterized in that: It comprises a mobile dust removal device for a multi-station LF refining furnace for a confined space as claimed in any one of claims 1 to 9, and also comprises a control device connected thereto.

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