A blast furnace charge car follower type flexible cover sealing device and sealing method thereof

Abstract

The present invention relates to a blast furnace charge car follower type flexible cover plate sealing device and a sealing method thereof, belonging to the field of environmental protection dust removal technology of blast furnace charging system in the metallurgical industry. The technical solution is as follows: the front of the blast furnace charge car compartment (1) is a loading and unloading end, the bottom surface of the blast furnace charge car compartment (1) is provided with a blast furnace charge car wheel pair (15), the front of the blast furnace charge car compartment (1) is composed of a plurality of flexible cover plates arranged side by side, each flexible cover plate is respectively fixed on a flap rotating shaft, the two ends of the flap rotating shaft are respectively rotatably connected to the side plate of the blast furnace charge car compartment (1), the two ends of the plurality of flap rotating shafts are respectively connected together by connecting arms (7), the connecting arms (7) are connected to the balance bar (6) through a pin shaft; the balance bar (6) is respectively provided with a small stiffness spring tensioning mechanism and a large stiffness spring tensioning mechanism. The beneficial effect of the present invention is that the moving charge car can be sealed to avoid dust pollution generated by raw materials during transportation.

Description

Technical Field

[0001] The invention relates to a blast furnace charging car follower type flexible cover plate sealing device and a sealing method thereof, belonging to the technical field of environmental protection dust removal of blast furnace charging systems in the metallurgical industry. Background Art

[0002] Currently, major steel and metallurgical companies across China use skips or belt feeders to transport raw materials such as coke, sinter, pellets, lump ore, limestone, and serpentine to blast furnaces. These skips and belt feeders generate varying degrees of dust during under-the-trough loading, over-the-bridge transport, and furnace-top unloading. Mature dust removal technologies exist for both under-the-trough and furnace-top loading and unloading of these systems.

[0003] Some domestic blast furnaces utilize two skips to transport various raw materials. The dust generated during this operation has become a difficult environmental issue for the blast furnace skip loading system. Although dust pollution from skip transport is far less than that from loading and unloading operations, it is still a problem that must be addressed.

[0004] In order to control the dust generated during the material transportation operation, some domestic steel companies use colored steel or other light materials to cover the inclined bridge where the material cars travel. This is costly, difficult to implement, and has a long construction period. It also adds a lot of additional load to the blast furnace material transportation inclined bridge. Summary of the Invention

[0005] The purpose of the present invention is to provide a blast furnace charge car follower type flexible cover sealing device and its sealing method, which can prevent the charge car from escaping dust when transporting raw materials, has low processing cost, is simple and easy, and solves the problems existing in the background technology.

[0006] The technical solution of the present invention is:

[0007] The blast furnace charge car follower type flexible cover sealing device comprises a blast furnace charge car compartment, a flexible cover, a flap rotating shaft, a balance bar, a connecting arm, a blast furnace charge wheel pair, a small stiffness spring tensioning mechanism and a large stiffness spring tensioning mechanism. The blast furnace charge car compartment is a closed structure. According to the running direction of the blast furnace charge car, the front of the blast furnace charge car compartment is the loading and unloading end. The bottom surface of the blast furnace charge car compartment is provided with a blast furnace charge wheel pair. The front of the blast furnace charge car compartment is composed of a plurality of flexible cover plates arranged side by side, and each flexible cover plate is respectively fixed on a flap rotating shaft, and the two ends of the flap rotating shaft are respectively rotatably connected to the side panels of the blast furnace charge car compartment, and the two ends of the plurality of flap rotating shafts are respectively connected together by connecting arms, and the connecting arms are connected to the balance bar through a pin shaft; a small stiffness spring tensioning mechanism and a large stiffness spring tensioning mechanism are respectively provided on the balance bar. The high stiffness spring tensioning mechanism includes a high stiffness spring tensioning rope, a high stiffness spring, a rope fixing column and a fixed pulley. One end of the high stiffness spring tensioning rope is fixed on the balance bar, and the other end of the high stiffness spring tensioning rope is connected to one end of the high stiffness spring through the fixed pulley. The other end of the high stiffness spring is fixed on the rope fixing column, and the rope fixing column is fixed on the side panel of the blast furnace charge car compartment; the low stiffness spring tensioning mechanism includes a low stiffness spring tensioning rope, a low stiffness spring, a connector, a connector tensioning steel cable, a fixed pulley two and a fixed pulley three. One end of the low stiffness spring tensioning rope is fixed on the balance bar, and the other end of the low stiffness spring tensioning rope is connected to one end of the low stiffness spring through the fixed pulley two, and the other end of the low stiffness spring is connected to one end of the connector tensioning steel cable through the fixed pulley three. The other end of the connector tensioning steel cable is provided with a connector.

[0008] A flexible cover opening limiter and a flexible cover closing limiter that match the flexible cover are respectively provided on both sides of the connecting arm.

[0009] The flexible cover plate opening limit and the flexible cover plate closing limit are respectively fixed on the side panels of the blast furnace charge car compartment.

[0010] The flexible cover is fixed on the flap shaft via a clip.

[0011] The flexible cover is made of silicone material or flexible resin material.

[0012] The connector and the positioning hook on the side wall of the blast furnace inclined bridge are well-known devices in this technical field. The connector is used in conjunction with the positioning hook on the side wall of the blast furnace inclined bridge, and its specific position depends on key parameters such as the external dimensions of the material car, the loading and unloading position of the material car, and the layout of the inclined bridge.

[0013] A blast furnace charge car follow-up sealing method adopts a blast furnace charge car follow-up flexible cover sealing device defined above. When the blast furnace charge car compartment is loaded and unloaded, the connector is connected to the positioning hook on the side wall of the blast furnace inclined bridge. The connector begins to stretch the small stiffness spring through the connector tensioning steel cable. The tension of the small stiffness spring acts on the large stiffness spring through the small stiffness spring tensioning rope, the balance bar and the large stiffness spring tensioning rope. When the small stiffness spring and the large stiffness spring reach a force balance, the tension of the connector and the positioning hook on the side wall of the blast furnace inclined bridge simultaneously stretches the large stiffness spring and the small stiffness spring. As the position of the balance bar moves, the connecting arm drives the flap shaft to rotate, thereby opening the flexible cover. When the connecting arm and the flexible cover open and limit contact, the flexible cover reaches the maximum opening. At this time, the large stiffness spring is stretched to the limit length, and the small stiffness spring is stretched to the limit length. The small stiffness spring will continue to be stretched as the trolley moves until the trolley reaches the designated position for loading and unloading, and the small stiffness spring is stretched to its maximum length; when the blast furnace trolley compartment completes loading and unloading, the trolley begins to move up or down along the blast furnace inclined bridge, and the small stiffness spring begins to contract. When the tension of the small stiffness spring is equal to that of the large stiffness spring, the small stiffness spring and the large stiffness spring begin to contract at the same time, and the flap shaft and the flexible cover begin to close under the drive of the large stiffness spring. When the connecting arm rotates to the flexible cover closing limit, the large stiffness spring no longer contracts, and the remaining tension serves as the closing force of the flexible cover to ensure the closure of the flexible cover, thereby realizing the blast furnace trolley follow-up sealing; at this time, the small stiffness spring will continue to contract as the position of the blast furnace trolley compartment and the connector changes until the connector is completely disengaged from the positioning hook on the side wall of the blast furnace inclined bridge.

[0014] The beneficial effects of the present invention are: it can seal the moving material cart, avoid dust pollution generated during the transportation of raw materials, and has low processing cost and is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a top view of the skip loading under the chute;

[0016] Figure 2 This is the main view of the material car running on the inclined bridge;

[0017] Figure 3 This is the main view of the blast furnace top when the skip is unloading;

[0018] In the figure: 1. Blast furnace charge car compartment; 2. Flexible cover opening limit; 3. Flexible cover; 4. Flap shaft; 5. Flexible cover closing limit; 6. Balance bar; 7. Connecting arm; 8. High-rigidity spring for tensioning rope; 9. High-rigidity spring; 10. Rope fixing column; 11. Low-rigidity spring for tensioning rope; 12. Low-rigidity spring; 13. Connector; 14. Fixed pulley 1; 15. Blast furnace charge car wheel pair; 16. Connector for tensioning steel cable; 17. High-rigidity spring for fixing steel cable; 18. Fixed pulley 2; 19. Fixed pulley 3. DETAILED DESCRIPTION

[0019] The present invention will be further described below with reference to the accompanying drawings and through examples.

[0020] Refer to the attached Figure 1 、 2 3. A blast furnace charge car follower type flexible cover sealing device, comprising a blast furnace charge car compartment 1, a flexible cover 3, a flap shaft 4, a balance bar 6, a connecting arm 7, a blast furnace charge wheel pair 15, a small stiffness spring tensioning mechanism and a large stiffness spring tensioning mechanism. The blast furnace charge car compartment 1 is a closed structure. According to the running direction of the blast furnace charge car, the front of the blast furnace charge car compartment 1 is the loading and unloading end. The bottom surface of the blast furnace charge car compartment 1 is provided with a blast furnace charge wheel pair 15. The front of the blast furnace charge car compartment 1 is composed of multiple flexible cover plates arranged side by side, each flexible cover plate is respectively fixed on a flap shaft, and the two ends of the flap shaft are respectively rotatably connected to the side panels of the blast furnace charge car compartment 1. The two ends of the multiple flap shafts are respectively connected together by connecting arms 7, and the connecting arms 7 are connected to the balance bar 6 through a pin shaft; a small stiffness spring tensioning mechanism and a large stiffness spring tensioning mechanism are respectively provided on the balance bar 6, and the large stiffness spring tensioning mechanism includes a large stiffness spring The tensioning rope 8, the large stiffness spring 9, the rope fixing column 10 and the fixed pulley 14, one end of the large stiffness spring tensioning rope 8 is fixed on the balance bar 6, the other end of the large stiffness spring tensioning rope 8 is connected to one end of the large stiffness spring 9 through the fixed pulley 14, the other end of the large stiffness spring 9 is fixed on the rope fixing column 10, and the rope fixing column 10 is fixed on the side panel of the blast furnace charge car compartment 1; the small stiffness spring tensioning mechanism includes a small stiffness spring tensioning rope 11, a small stiffness spring 12, a connector 13, a connector tensioning steel cable 16, a fixed pulley 2 18 and a fixed pulley 3 19, one end of the small stiffness spring tensioning rope 11 is fixed on the balance bar 6, the other end of the small stiffness spring tensioning rope 11 is connected to one end of the small stiffness spring 12 through the fixed pulley 2 8, the other end of the small stiffness spring 12 is connected to one end of the connector tensioning steel cable 16 through the fixed pulley 3 19, and the other end of the connector tensioning steel cable 16 is provided with a connector 13. Specific embodiment:

[0022] In this embodiment, refer to the attached Figure 1 、 23. The flap shaft 4 is positioned and installed through the positioning holes on the side panels of the blast furnace charge car 1. The two ends of the flap shaft 4 are fixed with cotter pins. The flexible cover 3 is made of belt, silicone material or flexible resin material. It is a flexible body with a certain strength and rigidity, similar to the width of the inner side of the charge car. Its width is determined according to the length and number of the inner side of the charge car. The flexible cover 3 is installed on the flap shaft 4 through a clip, so that the flap shaft 4 drives the flexible cover 3 to rotate; the connecting arm 7 is installed at both ends of the flap shaft 4 through the positioning pin, and finally the balance bar 6 is installed in the pin shaft on the connecting arm 7. The balance bar 6 can drive the flexible cover 3 to complete the unified opening and closing action by moving left and right. The flexible cover opening protection limit 2 and the flexible cover closing protection limit 5 are set on the left and right sides of the connecting arm 7 to ensure the opening and closing angles of the flexible cover 3.

[0023] Refer to the attached Figure 1 、 2 3. The high-rigidity spring tensioning mechanism includes a high-rigidity spring tensioning rope 8, a high-rigidity spring 9, a rope fixing column 10 and a fixed pulley 14. One end of the high-rigidity spring tensioning rope 8 is connected to the balance bar 6 to provide closing pressure for the closed flexible cover 3, and the other end is connected to the high-rigidity spring 9 through the fixed pulley 14. The other end of the high-rigidity spring 9 is connected and fixed to the rope fixing column 10 through the high-rigidity spring fixing steel cable 17.

[0024] Refer to the attached Figure 1 、 2 3. The low-rigidity spring tensioning mechanism includes a low-rigidity spring tensioning rope 11, a low-rigidity spring 12, a connector 13, a connector tensioning cable 16, a second fixed pulley 18, and a third fixed pulley 19. One end of the low-rigidity spring tensioning rope 11 is fixed to the balance pole 6. The other end of the low-rigidity spring tensioning rope 11 is connected to one end of the low-rigidity spring 12 via the second fixed pulley 8. The other end of the low-rigidity spring 12 is connected to one end of the connector tensioning cable 16 via the third fixed pulley 19. The other end of the connector tensioning cable 16 is provided with a connector 13. Connector 13 is a circular ring made of 18 mm diameter spring steel or wear-resistant steel, with an inner diameter of 160 mm.

[0025] The connector 13 cooperates with the positioning hook on the side wall of the blast furnace skew bridge, and its specific position depends on key parameters such as the overall size of the skip, the loading and unloading position of the skip and the layout of the skew bridge.

[0026] After the connector 13 is connected to the positioning hook, the connector 13 begins to stretch the small stiffness spring 12 through the connector tensioning cable 16. The spring tension acts on the large stiffness spring 9 through the small stiffness spring tensioning rope 11, the balance bar 6 and the large stiffness spring tensioning rope 8. When the small stiffness spring 12 and the large stiffness spring 9 reach force balance, the tension of the connector 13 and the positioning hook simultaneously stretches the small stiffness spring 12 and the large stiffness spring 9. As the position of the balance bar 6 moves, the connecting arm 7 drives the flap shaft 4 to rotate, thereby opening the flexible cover 3. When the connecting arm 7 contacts the flexible cover opening limit 2, the flexible cover 3 reaches the maximum opening. At this time, the large stiffness spring 9 is stretched to the limit length, and the small stiffness spring 12 will continue to be stretched as the material cart moves until the material cart reaches the designated position for loading and unloading, and the small stiffness spring 12 is stretched to the limit length.

[0027] When the skip is finished loading and unloading, the skip moves up or down the blast furnace inclined bridge, and the small stiffness spring 12 begins to contract. When the tension of the small stiffness spring 12 is equal to that of the large stiffness spring 9, the two springs begin to contract simultaneously, and the flap shaft 4 and the flexible cover 3 begin to close under the drive of the large stiffness spring 9. When the connecting arm 7 rotates to the flexible cover closing limit 5, the large stiffness spring 9 no longer contracts, and the remaining tension serves as the closing force of the flexible cover 3. At this time, the small stiffness spring 12 will continue to contract as the position of the skip and the connector 13 changes, until the connector 13 and the positioning hook are completely separated.

Claims

1. A blast furnace charge car follower type flexible cover sealing device, characterized by: The present invention comprises a blast furnace charge car compartment (1), a flexible cover plate (3), a flap rotating shaft (4), a balancing rod (6), a connecting arm (7), a blast furnace charge wheel pair (15), a small stiffness spring tensioning mechanism and a large stiffness spring tensioning mechanism. The blast furnace charge car compartment (1) is a closed structure. According to the running direction of the blast furnace charge car, the front of the blast furnace charge car compartment (1) is a loading and unloading end. The bottom surface of the blast furnace charge car compartment (1) is provided with a blast furnace charge wheel pair (15). The front of the blast furnace charge car compartment (1) is composed of a plurality of flexible cover plates arranged side by side. A flexible cover plate is fixed on a flap rotating shaft, and the two ends of the flap rotating shaft are respectively connected to the side plates of the blast furnace charge car compartment (1). The two ends of the plurality of flap rotating shafts are connected together by connecting arms (7), and the connecting arms (7) are connected to the balance bar (6) through a pin shaft; the balance bar (6) is respectively provided with a small stiffness spring tensioning mechanism and a large stiffness spring tensioning mechanism, and the large stiffness spring tensioning mechanism includes a large stiffness spring tensioning rope (8), a large stiffness spring (9), a rope fixing column (1 0) and a fixed pulley (14), one end of a large-rigidity spring tensioning rope (8) is fixed on a balance bar (6), the other end of the large-rigidity spring tensioning rope (8) is connected to one end of a large-rigidity spring (9) through a fixed pulley (14), the other end of the large-rigidity spring (9) is fixed on a rope fixing column (10), and the rope fixing column (10) is fixed on a side plate of a blast furnace charge car (1); the small-rigidity spring tensioning mechanism comprises a small-rigidity spring tensioning rope (11), a small-rigidity spring (12), a connector (13), a connector tensioning steel cable (16), a fixed pulley 2 (18) and a fixed pulley 3 (19), one end of a small stiffness spring tensioning rope (11) is fixed to the balance bar (6), the other end of the small stiffness spring tensioning rope (11) is connected to one end of a small stiffness spring (12) through the fixed pulley 2 (18), the other end of the small stiffness spring (12) is connected to one end of the connector tensioning steel cable (16) through the fixed pulley 3 (19), and the other end of the connector tensioning steel cable (16) is provided with a connector (13); A flexible cover opening limiter (2) and a flexible cover closing limiter (5) that match the flexible cover (3) are respectively provided on both sides of the connecting arm (7); the flexible cover opening limiter (2) and the flexible cover closing limiter (5) are respectively fixed on the side panels of the blast furnace charge car compartment (1).

2. The blast furnace skip follower type flexible cover sealing device according to claim 1, characterized in that: The flexible cover plate (3) is fixed on the flap rotating shaft (4) via a clip.

3. A blast furnace skip follower type flexible cover sealing device according to claim 1 or 2, characterized in that: The flexible cover plate (3) is made of silicone material or flexible resin material.

4. A blast furnace skip follower sealing method, characterized in that: A blast furnace charge car follower type flexible cover sealing device as defined in claim 1, 2 or 3 is used. When the blast furnace charge car compartment (1) is loaded and unloaded, the connector (13) is connected to the positioning hook on the side wall of the blast furnace inclined bridge. The connector (13) begins to stretch the small stiffness spring (12) through the connector tensioning steel cable (16). The tension of the small stiffness spring (12) acts on the large stiffness spring (9) through the small stiffness spring tensioning rope (11), the balance bar (6) and the large stiffness spring tensioning rope (8). When the small stiffness spring (12) is tightened, the tension of the small stiffness spring (12) is tightened. When the spring (12) and the high-rigidity spring (9) reach a force balance, the tension of the connector (13) and the positioning hook on the side wall of the blast furnace inclined bridge simultaneously stretches the high-rigidity spring (9) and the low-rigidity spring (12). As the position of the balance bar (6) moves, the connecting arm (7) drives the flap shaft (4) to rotate, thereby opening the flexible cover (3). When the connecting arm (7) contacts the flexible cover opening limit (2), the flexible cover (3) reaches the maximum opening. At this time, the high-rigidity spring (9) is stretched to the limit length, and the low-rigidity spring (12) is stretched to the limit length. The stiffness spring (12) will continue to be stretched as the trolley moves until the trolley reaches the designated position for loading and unloading, at which point the small stiffness spring (12) is stretched to its limit length. When the blast furnace trolley carriage (1) completes loading and unloading, the trolley begins to move up or down along the blast furnace inclined bridge. At this time, the small stiffness spring (12) begins to contract. When the tension of the small stiffness spring (12) is equal to that of the large stiffness spring (9), the small stiffness spring (12) and the large stiffness spring (9) begin to contract simultaneously, and the flap shaft (4) and the flexible cover plate ( 3) It starts to close under the drive of the large stiffness spring (9). When the connecting arm (7) rotates to the flexible cover closing limit (5), the large stiffness spring (9) no longer contracts, and the remaining tension serves as the closing force of the flexible cover (3), ensuring the closure of the flexible cover (3), thereby realizing the blast furnace charge car follow-up type sealing. At this time, the small stiffness spring (12) will continue to contract as the position of the blast furnace charge car carriage (1) and the connector (13) changes until the connector (13) is completely separated from the positioning hook on the side wall of the blast furnace inclined bridge.

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