Furnace door closing structure

Abstract

The utility model discloses a furnace door closing structure which comprises a track bottom plate and a heavy furnace door body. Track pressing plates are arranged on the two sides of the upper portion of the track bottom plate, and gaps are formed between the track bottom plate and the track pressing plates to form sliding tracks. The two sides of the heavy furnace door body are connected with connecting plates, and the connecting plates penetrate through the sliding rails to be connected with oil cylinders. Fireproof check blocks are arranged on the two sides of the heavy furnace door body on the lower portion of the rail bottom plate, and cooling pipelines are formed in the fireproof check blocks. Through the arrangement of the heavy door plate, steel slag is thoroughly cut off, the furnace door is closed, the temperature in the furnace is ensured, the smelting cost is reduced, meanwhile, the bidirectional oil cylinder is arranged to lift the furnace door to carry out slag discharging and cleaning work, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of steelmaking, in particular to a closed furnace door structure. Background Art

[0002] During the steelmaking process, the furnace door needs to be raised and lowered. However, the existing furnace door is made of lightweight materials. After the furnace door is opened and closed, it cannot completely cut off the slag, resulting in the furnace door not being tightly closed, causing the temperature in the furnace to drop, affecting the subsequent steelmaking process, and also easily creating safety hazards. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a closed furnace door structure.

[0004] The utility model is realized by adopting the following technical solutions.

[0005] A closed furnace door structure comprises a track base plate and a heavy furnace door body; track pressure plates are provided on both sides of the upper portion of the track base plate, and a gap is provided between the track base plate and the track pressure plate to form a sliding track; connecting plates are connected to both sides of the heavy furnace door body, and the connecting plates pass through the sliding track and are connected to the oil cylinder; fireproof blocks are provided on both sides of the heavy furnace door body at the lower portion of the track base plate, and cooling pipelines are formed in the fireproof blocks.

[0006] Furthermore, an observation window is provided in the center of the heavy furnace door body.

[0007] Furthermore, a fixing pin is passed through the connecting plate; and a position-limiting fixing hole is provided on the upper portion of the track bottom plate, and the position of the position-limiting fixing hole corresponds to the fixing pin.

[0008] Furthermore, a cooling pipe is provided in the track bottom plate, and the cooling pipe is communicated with the cooling pipeline in the fireproof block.

[0009] Furthermore, the upper and lower ends of the track pressure plate are movably connected to the track base plate through pin plates.

[0010] This application has the following beneficial effects.

[0011] This utility model completely cuts off the slag by installing a heavy-duty door panel, sealing the furnace door and maintaining the internal temperature. A two-way oil cylinder is also provided to raise the furnace door for slag discharge and cleaning. Furthermore, a fire block is provided at the outlet, and a cooling pipe is installed within the fire block. This not only drains the slag, but also protects the oil cylinder, preventing prolonged high-temperature operation that shortens its service life. This utility model reduces smelting costs, accelerates the smelting process, and improves the safety of the steelmaking process, with strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 It is a schematic diagram of the structure of the cooling pipeline of the utility model.

[0014] Among them, 1. Heavy-duty furnace door body; 101. Observation window; 2. Oil cylinder; 201. Ear shaft; 3. Fixed base; 4. Connecting plate; 5. Fireproof block; 6. Track bottom plate; 7. Track pressure plate; 8. Pin plate; 9. Pressure plate reinforcement rib; 10. Cooling pipeline; 11. Fixing pin; 12. Limit fixing hole. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] like Figure 1 、 2 As shown, a closed furnace door structure includes a heavy furnace door body 1, an oil cylinder 2, a fireproof block 5 and a track bottom plate 6.

[0017] The heavy-duty furnace door body 1 of this application measures 1600mm × 1100mm × 180mm, is water-cooled, and weighs 2.5 tons. Its own weight can completely cut off the slag flowing out after the furnace door is opened, and its 180mm thickness can also resist high-temperature deformation. In addition, according to the manufacturer's smelting needs, an observation window 101 (350mm × 200mm in size) can be opened at an appropriate location, such as 600mm from the bottom of the furnace door body, to observe the slag condition in the furnace and know the thickness of the slag layer.

[0018] The track base plate 6 is in an "H" shape, and the back side is welded to the furnace door frame of the furnace shell. The heavy furnace door body 1 can slide on the track base plate 6. Specifically, track pressing plates 7 are provided on both sides of the upper part of the track base plate 6. The upper and lower ends of the track pressing plates 7 are movably connected to the track base plate 6 through pin plates 8. The pin plates 8 are used to connect the track pressing plates 7 to the track base plate 6, which facilitates the disassembly of the heavy furnace door body 1. A gap is formed between the middle part of the track pressing plate 7 and the track base plate 6. This gap is the sliding track of the heavy furnace door body 1, which provides a guide for the sliding of the heavy furnace door body 1. In order to strengthen the strength of the track pressing plate 7, the present application may also provide a pressure plate reinforcing rib 9 on the track pressing plate 7.

[0019] The two sides of the heavy furnace door body 1 are connected to the connecting plates 4, which are welded together with the heavy furnace door body 1 to ensure strength. The other end of the connecting plate 4 passes through the above-mentioned sliding track and is connected to the ear shaft 201 of the oil cylinder 2. The oil cylinder 2 is used to perform the lifting and lowering actions of the furnace door. The oil cylinder 2 itself has a cooling jacket and can provide 10 tons of thrust and 8 tons of pulling force. The oil cylinders 2 on both sides use synchronous motors to ensure synchronous operation. The lower end of the oil cylinder 2 of this application is fixed to the lower furnace shell through a fixed base 3 (the position can be adjusted according to actual conditions).

[0020] The track base plate 6 of the present application can be formed by laminating multiple slabs. Preferably, the cross-section of the track base plate 6 is a right triangle, one of which is welded to the furnace door frame. The hypotenuse of the triangle is the plane where the heavy furnace door body 1 is located. That is, the track base plate 6 is tilted at a certain angle toward the furnace while being connected to the furnace door frame. The heavy weight of the furnace door itself is used to better fit the furnace door plate and the slideway, thereby reducing temperature loss. In addition, a cooling pipe can also be provided in the track base plate 6 of the present application.

[0021] Fire blocks 5 are provided on both sides of the heavy-duty furnace door body 1 below the track base plate 6. When the furnace door is opened, these blocks 5 protect the oil cylinder 2 and piston rod, reducing damage from flames. A cooling line 10 is formed within the fire block 5. This cooling line 10 communicates with a cooling pipe within the track base plate 6. By introducing a cooling medium into the cooling pipe 10 and the cooling pipe of the track base plate 6, the purpose of further protecting components such as the oil cylinder 2 is achieved, thereby extending their service life.

[0022] The stroke of the furnace door of this application is 1000mm, and there is a mechanical limit pin at the high point to ensure safety. Specifically, a fixing pin 11 is passed through the connecting plate 4. At the same time, a limit fixing hole 12 is provided on the upper part of the track base plate 6. When the heavy furnace door body 1 is at the highest point, the fixing pin 11 can be inserted into the limit fixing hole 12 to achieve mechanical limitation.

[0023] The embodiments of this specific implementation method are all preferred embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the scope of protection of the present utility model.

Claims

1. A closed furnace door structure, characterized in that: The invention comprises a track base plate (6) and a heavy furnace door body (1); track pressing plates (7) are provided on both sides of the upper portion of the track base plate (6); a gap is provided between the track base plate (6) and the track pressing plates (7) to form a sliding track; connecting plates (4) are connected to both sides of the heavy furnace door body (1), and the connecting plates (4) pass through the sliding track and are connected to the oil cylinder (2); fireproof blocks (5) are provided on both sides of the heavy furnace door body (1) below the track base plate (6), and a cooling pipeline (10) is formed in the fireproof blocks (5).

2. A closed furnace door structure according to claim 1, characterized in that: An observation window (101) is provided in the center of the heavy-duty furnace door body (1).

3. The closed furnace door structure according to claim 1, characterized in that: A fixing pin (11) is provided on the connecting plate (4); a position-limiting fixing hole (12) is provided on the upper portion of the track bottom plate (6), and the position of the position-limiting fixing hole (12) corresponds to the fixing pin (11).

4. The closed furnace door structure according to claim 1, characterized in that: A cooling pipe is provided in the rail bottom plate (6), and the cooling pipe is communicated with a cooling pipeline (10) in the fireproof block (5).

5. The closed furnace door structure according to claim 1, characterized in that: The upper and lower ends of the track pressing plate (7) are movably connected to the track bottom plate (6) through pin plates (8).

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