A device capable of quickly and safely opening and blocking the blast furnace tuyere

Abstract

The utility model provides a device capable of quickly and safely opening and blocking blast furnace tuyere, belongs to blast furnace production equipment technical field, is used for quickly and safely opening and blocking blast furnace tuyere, its technical scheme is: tuyere blocking brick is by blocking brick body, wire netting, steel wire rope is formed, blocking brick body is cylinder, the diameter of cylinder is matched with blast furnace tuyere diameter, wire netting is cast in blocking brick body, one end of steel wire rope is embedded in blocking brick body and is connected with wire netting, the other end of steel wire rope is pulled out with the end face of blocking brick body and is connected with cylinder, support is fixed outside blast furnace blowpipe big lid, cylinder is installed on support, cylinder is connected with speed reducer, speed reducer is connected with motor. The utility model discloses simple structure, convenient to use can open the tuyere blocking brick of blocking blast furnace tuyere quickly, alleviates the labor intensity of worker, and can avoid the burn of high temperature gas of blast furnace tuyere to operating personnel, eliminates the hidden danger, guarantees the smooth progress of production.

Description

Technical Field

[0001] This utility model relates to a device that can quickly and safely open and close blast furnace tuyeres, belonging to the technical field of blast furnace production equipment. Background Technology

[0002] The tuyere is the device through which high-pressure air and oxygen enter the blast furnace. The number of tuyeres varies depending on the furnace volume. When starting up the blast furnace, after maintenance, or handling special furnace conditions, several tuyeres need to be blocked to increase the air velocity and blast energy for rapid furnace recovery. Once the furnace conditions stabilize, they are opened one by one. Traditional tuyere plugs are made of ground refractory bricks, which cannot seal tightly to the edges and front of the tuyere, resulting in high air leakage. Furthermore, due to the narrow air inlet channels of the blowpipe and tuyere, the plugging bricks often tip over during plugging, causing plugging failure. This makes the plugging operation extremely time-consuming and labor-intensive. Traditional tuyere opening is a very dangerous operation. During production, the blast furnace is under high pressure and high temperature. Opening the tuyere causes high-temperature gas and broken tuyere plugging bricks to spray out into the observation hole of the blowpipe cover, easily leading to burns and injuries. Traditional ventilation venting operations involve 6-8 workers carrying a special sliding hammer to insert into the air intake of the blowpipe and vent, manually striking the hammer to break the vent's sealing bricks. During this work, workers not only endure tremendous noise and face high-temperature gas and debris ejected from behind the high-speed cover, but also overcome the immense resistance from the high-pressure airflow. The labor intensity is extremely high, and the risk factor is very high. Therefore, the structure of the vent sealing bricks needs to be improved to enable quick and safe vent opening operations. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a device that can quickly and safely open and close blast furnace tuyeres. This device can quickly open the tuyeres blocking bricks, reduce the labor intensity of workers, avoid burns to operators caused by high-temperature gas from the blast furnace tuyeres, eliminate safety hazards, and ensure the smooth operation of production.

[0004] The technical solution to the above technical problem is:

[0005] A device for quickly and safely opening and closing blast furnace tuyeres includes a tuyere plugging brick, a support frame, a roller, a reducer, and a motor. The tuyere plugging brick consists of a plugging brick body, wire mesh, and steel wire rope. The plugging brick body is cylindrical, and the diameter of the cylinder matches the diameter of the blast furnace tuyere. The wire mesh is cast into the plugging brick body. One end of the steel wire rope is embedded in the plugging brick body and connected to the wire mesh. The other end of the steel wire rope is pulled vertically out from the end face of the plugging brick body and connected to the roller. The support frame is fixed to the outside of the blast furnace blowpipe cover. The roller is mounted on the support frame and connected to the reducer. The reducer is connected to the motor.

[0006] The aforementioned device for quickly and safely opening and blocking blast furnace tuyeres has a tapered cylindrical blocking brick body. The diameter of the front end of the cylindrical blocking brick body is smaller than the diameter of the rear end of the cylinder, and the tapered shape of the cylindrical blocking brick body matches the blast furnace tuyeres.

[0007] The aforementioned device for quickly and safely opening and blocking blast furnace tuyeres comprises a wire mesh consisting of a ring and wires. The ring is placed in the middle of the cylinder of the blocking brick, with the plane of the ring parallel to the end face of the cylinder of the blocking brick. Multiple wires are welded around the circumference of the ring, and these multiple wires are respectively along the diameter of the cross-section of the cylinder of the blocking brick. Multiple short wires are welded onto these multiple wires to form a wire mesh structure.

[0008] The aforementioned device for quickly and safely opening and blocking blast furnace tuyeres involves splitting one end of a steel wire rope into 6-8 strands after passing through a ring of wire mesh inside the blocking brick. Each of the 6-8 strands is then bent at a 90-degree angle and evenly distributed around the circumference of the blocking brick.

[0009] The aforementioned device for quickly and safely opening and blocking blast furnace tuyeres has a bracket made of welded channel steel. The front ends of the two arms of the rectangular frame are opposite to the two sides of the blast furnace blowpipe. The front ends of the two arms of the rectangular frame have vertical pin holes. The pin holes are opposite to the pin connection points of the blowpipe cover and the blowpipe. The bracket fixing pin is fixedly connected to the two sides of the blowpipe through the pin holes.

[0010] The aforementioned device for quickly and safely opening and blocking blast furnace tuyeres has opposing shaft holes on the rear end faces of the two arms of the rectangular frame of the support. The two ends of the drum shaft are respectively connected to the shaft holes of the two arms of the rectangular frame. One end of the drum shaft is connected to the reducer. A steel hook is welded to one end of the circumference of the drum. The rear end of the wire rope has a wire rope loop connected to the steel hook of the drum. There is a wire rope groove on the circumference of the drum, and the wire rope is embedded in the wire rope groove of the drum.

[0011] The beneficial effects of this utility model are:

[0012] The tuyere blocking brick of this invention is embedded with wire mesh and dispersing steel wire rope. When the steel wire rope pulls the blocking brick outward, the wire mesh and dispersing steel wire rope can tear the blocking brick into pieces. The bracket is fixed to the outer end of the blowpipe, and the roller is installed on the bracket. The outer end of the steel wire rope is connected to the roller and the reducer. The reducer and the roller can pull the steel wire rope to pull the tuyere blocking brick outward, thereby opening and closing the blast furnace tuyere.

[0013] This utility model has a simple structure and is easy to use. It can quickly open the tuyeres blocking the blast furnace tuyeres, reduce the labor intensity of workers, avoid burns to operators caused by the high-temperature gas in the blast furnace tuyeres, eliminate safety hazards, and ensure the smooth operation of production. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the air vent blocking brick;

[0016] Figure 3 yes Figure 2 Side view;

[0017] Figure 4 This is a schematic diagram of the usage state of this utility model.

[0018] The following are marked in the diagram: 1. Tunnel plug; 2. Wire mesh; 3. Ring; 4. Wire; 5. Wire rope; 6. Wire rope ring; 7. Support; 8. Roller; 9. Reducer; 10. Motor; 11. Support fixing pin; 12. Blast furnace tunnel; 13. Blowpipe; 14. Inspection hole insert plate; 15. Blowpipe cover; 16. Inspection hole insert plate windproof ball valve; 17. Sealing cap; 18. Inspection hole front end short pipe; 19. Detailed Implementation

[0019] This utility model consists of an air vent blocking brick 1, a steel wire rope 6, a bracket 8, a roller 9, a reducer 10, and a motor 11.

[0020] Figure 1 The diagram shows that the tuyere plug 1 matches the diameter of the blast furnace tuyere 13, and is embedded in the tuyere 13 to seal it. One end of the wire rope 6 is embedded in the tuyere plug 1, and the other end of the wire rope 6 is pulled vertically out from the end face of the tuyere plug 1 and connected to the roller 9. The bracket 8 is fixed to the outside of the blast furnace blowpipe cover 16, and the roller 9 is mounted on the bracket 8. The roller 9 is connected to the reducer 10, and the reducer 10 is connected to the motor 11. The motor 11, reducer 10, and roller 9 can pull the wire rope 6 to pull the tuyere plug 1 outward, thus opening the blast furnace tuyere 13.

[0021] Figure 2 , 3 The diagram shows that the tuyeres plugging brick 1 consists of a plugging brick body 2, wire mesh 3, and steel wire rope 6. The plugging brick body 2 is a cylinder with a taper; the diameter of the front end of the cylinder is smaller than the diameter of the rear end, and the taper of the cylinder matches the blast furnace tuyeres 13. The tuyeres plugging brick 1 is cast from high-temperature ceramic material according to the dimensions of the blast furnace tuyeres 13, effectively sealing the front end of the blast furnace tuyeres 13 without air leakage. Simultaneously, it expands when heated, tightly pressing itself inside the tuyeres sleeve.

[0022] Figure 2 , 3The diagram shows that the wire mesh 3 is cast inside the brick-blocking body 2. The wire mesh 3 consists of a ring 4 and wires 5. The ring 4 is placed in the middle of the cylinder of the brick-blocking body 2, and the plane of the ring is parallel to the end face of the cylinder of the brick-blocking body 2. Multiple wires 5 are welded around the circumference of the ring 4. The multiple wires 5 are respectively along the diameter of the cross-section of the cylinder of the brick-blocking body 2, and multiple short wires are welded to the multiple wires 5 to form the wire mesh 3 structure.

[0023] Figure 2 , 3 The diagram shows that one end of the steel wire rope 6 passes through the ring 4 of the wire mesh 3 inside the brick-blocking body 2 and is then split into 6-8 strands. These 6-8 strands are bent at 90 degrees and spread out around the circumference of the brick-blocking body 2. Six iron wires 5 are welded onto the ring 4 of the wire mesh 3, each wire 5 forming a 70-80° angle with the ring 4. Two short iron wires are then welded onto each wire 5, forming a serrated wire mesh 3. A conical mold is then made using an iron plate with an inner diameter of 13. The dispersed steel wire rope 6 and the serrated wire mesh 3 are placed into the mold, with the steel wire rope 6 evenly distributed inside. High-temperature ceramic material mixed with high-temperature resin is poured into the mold, dried, and then demolded to form a circular vent brick-blocking body 1 with the steel wire rope 6. The other end of the steel wire rope 6 is braided into a steel wire rope loop 7, which is used to connect to the roller 9 of the support 8. When the steel wire rope 6 pulls the brick block 2 outward, the wire mesh 3 and the dispersing steel wire rope 6 can tear the brick block 2 apart.

[0024] Figure 1 The bracket 8 is a rectangular frame welded from channel steel. The front ends of the two arms of the rectangular frame are opposite to the two sides of the blast furnace blowpipe 14. There are vertical pin holes on the front ends of the two arms of the rectangular frame. The pin holes are opposite to the pin connection points of the blowpipe cover 16 and the blowpipe 14. The bracket fixing pin 12 is fixedly connected to the two sides of the blowpipe 14 through the pin holes.

[0025] Figure 1 The display shows that the two arms of the rectangular frame of the bracket 8 have opposite shaft holes on their rear ends. The two ends of the roller shaft are connected to the shaft holes of the two arms of the rectangular frame respectively. One end of the roller shaft is connected to the reducer 10. A steel hook is welded to one end of the circumference of the roller 9. The wire rope loop 7 at the rear end of the wire rope 6 is connected to the steel hook of the roller 9. When the roller 9 rotates, the wire rope 6 is wound around the roller 9. The front end of the wire rope 6 is pulled outward to the air vent blockage brick 1. There is a wire rope groove on the circumference of the roller 9. The wire rope 6 is embedded in the wire rope groove of the roller 9.

[0026] Figure 4 The usage process of this utility model is shown as follows:

[0027] Blocking air vents

[0028] First, remove the inspection hole plate 15 of the tuyeres 13 that need to be blocked. Then, remove the fixing pin plate of the blowpipe cover 16 and remove the blowpipe cover 16 to expose the air inlet passage of the blowpipe 14. Thread the steel wire rope 6 of the tuyeres blocking brick 1 into a steel pipe, tighten the steel wire rope 6 to fix the tuyeres blocking brick 1 onto the steel pipe, and use the steel pipe to press the front end of the tuyeres blocking brick 1 of the blast furnace tuyeres 1 firmly by gently poking it with the steel pipe. Pull out the steel pipe and thread the steel wire rope loop 7 through the blowpipe cover. 16. Then install the blowpipe cap 16 onto the blowpipe 5, insert the fixing pin plate of the blowpipe cap 16 and tighten it; open the peephole insert plate windproof ball valve 17, pass the wire rope ring 7 through the observation hole of the peephole insert plate 15, and install the peephole insert plate 15 onto the blowpipe cap 16; stuff water-filled mud or sealant into the short tube 19 at the front end of the peephole, exposing the wire rope 7, and finally install the sealing cap 18 onto the short tube 19 at the front end of the peephole, and the air vent is blocked.

[0029] Opening air vents

[0030] First, remove the cap 18 to expose the wire rope ring 7. Place the bracket 8 at the pin connection between the blowpipe cover 16 and the blowpipe 14, and insert the bracket fixing pin 12 to tighten it. Fix the wire rope ring 7 to the fixing hook of the drum 9. Then start the motor 11 to drive the reducer 10 and the drum 9 to rotate, winding the wire rope 6. The wire rope 6 pulls the tuyeres block 1 outward. Because the tuyeres block 1 expands due to heat, it will get stuck inside the blast furnace tuyeres 13. When the wire rope 6 is pulled, it disperses the wire rope 6 and the wire mesh 3. Under the action of the air pressure, the tuyer block 1 will be torn apart, and the fragments will be blown into the furnace. If the tuyer block 1 is not broken, it will be blocked by the blowpipe cover 16 when it moves outward with the wire rope 6. After the wire rope 6 and the wire mesh 3 are pulled out, they will also tear apart the tuyer block 1. The wire mesh 3 and the wire rope 6 have good flexibility and can be easily deformed to pass through the inspection hole. After the wire rope 6 is completely out, the inspection hole insert plate stop valve 17 is immediately closed to block the high-pressure air and oxygen, and the tuyer opening operation is completed.

[0031] An embodiment of this utility model is as follows:

[0032] The length of the brick body 2 of the air vent blocking brick 1 is 60mm, the diameter of the upper end face is 130mm, and the diameter of the lower end face is 135mm.

[0033] The wire mesh 3 has a diameter of 3mm, the ring 4 has a diameter of 9mm, and the wire 5 has a length of 125mm;

[0034] The diameter of wire rope 6 is 8mm and its length is 4500mm;

[0035] The frame of bracket 8 is 600mm long, 400mm wide, and 300mm high;

[0036] The length of roller 9 is 350mm and the diameter is 200mm;

[0037] The model of reducer 10 is WPS-40;

[0038] Motor 11 is a YL80-2 / 1.1kw single-phase motor.

Claims

1. A device capable of quickly and safely opening and closing blast furnace tuyeres, characterized in that: It includes a tuyere plug (1), a support (8), a roller (9), a reducer (10), and a motor (11). The tuyere plug (1) consists of a plug body (2), a wire mesh (3), and a steel wire rope (6). The plug body (2) is a cylinder with a diameter that matches the diameter of the blast furnace tuyere (13). The wire mesh (3) is poured into the plug body (2). One end of the steel wire rope (6) is embedded in the plug body (2) and connected to the wire mesh (3). The other end of the steel wire rope (6) is pulled vertically from the end face of the plug body (2) and connected to the roller (9). The support (8) is fixed on the outside of the blowpipe cover (16). The roller (9) is installed on the support (8). The roller (9) is connected to the reducer (10), and the reducer (10) is connected to the motor (11).

2. The device for quickly and safely opening and closing blast furnace tuyeres according to claim 1, characterized in that: The cylinder of the blocking brick body (2) has a taper. The front diameter of the cylinder of the blocking brick body (2) is smaller than the rear diameter of the cylinder. The taper of the cylinder of the blocking brick body (2) matches the blast furnace tuyeres (13).

3. The device for quickly and safely opening and closing blast furnace tuyeres according to claim 2, characterized in that: The wire mesh (3) consists of a ring (4) and wires (5). The ring (4) is placed in the middle of the cylinder of the brick block (2). The plane of the ring (4) is parallel to the end face of the cylinder of the brick block (2). Multiple wires (5) are welded around the circumference of the ring (4). The multiple wires (5) are respectively along the diameter of the cross section of the cylinder of the brick block (2). Multiple short wires are welded on the multiple wires (5) to form the wire mesh (3) structure.

4. The device for quickly and safely opening and closing blast furnace tuyeres according to claim 3, characterized in that: One end of the steel wire rope (6) passes through the ring (4) of the wire mesh (3) inside the brick block (2) and is then split into 6-8 strands. The 6-8 strands are bent at ninety degrees and distributed evenly around the circumference of the brick block (2).

5. The device for quickly and safely opening and closing blast furnace tuyeres according to claim 4, characterized in that: The bracket (8) is a rectangular frame welded from channel steel. The front ends of the two arms of the rectangular frame are opposite to the two sides of the blowpipe (14). There are pin holes in the vertical direction on the front ends of the two arms of the rectangular frame. The pin holes are opposite to the pin connection points of the blowpipe cover (16) and the blowpipe (14). The bracket fixing pin (12) is fixedly connected to the two sides of the blowpipe (14) through the pin holes.

6. The device for quickly and safely opening and closing blast furnace tuyeres according to claim 5, characterized in that: The rectangular frame of the bracket (8) has opposing shaft holes on the rear end faces of the two arms. The two ends of the roller shaft are connected to the shaft holes of the two arms of the rectangular frame respectively. One end of the roller shaft is connected to the reducer (10). A steel hook is welded to one end of the circumference of the roller (9). The rear end of the wire rope (6) has a wire rope loop (7) connected to the steel hook of the roller (9). The circumference of the roller (9) has a wire rope groove. The wire rope (6) is embedded in the wire rope groove of the roller (9).

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