Sealing device for lifting pipe of movable smoke hood of converter

Abstract

The utility model discloses a sealing device for a lifting pipe of a movable smoke hood of a converter, which comprises a lifting pipe penetrating through the ground, a movable gap is arranged between the lifting pipe and the ground, a water seal mechanism is arranged above the ground, the water seal mechanism comprises an inner cylinder and an outer cylinder which are coaxially arranged, the movable gap is positioned on the inner side of the inner cylinder, and the movable gap is positioned on the outer side of the outer cylinder. A circle of annular water seal tank is arranged between the inner cylinder and the outer cylinder, the bottom of the inner cylinder and the bottom of the outer cylinder are connected with the ground in a sealed mode, the lifting pipe upwards penetrates through the inner cylinder and is sleeved with a sealing plate, the sealing plate is connected with the lifting pipe in a sealed mode, the sealing plate is provided with a circle of annular inserting plate along the circumference, and the annular inserting plate is inserted into the water seal tank. The water seal tank is filled with water with a certain height; according to the utility model, the smoke of the converter is prevented from leaking from a movable gap between the lifting pipe and the ground, and the production safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder metallurgy, in particular to a sealing device for a lifting pipe of a converter movable hood. Background Art

[0002] During the smelting process of a converter, a large amount of flue gas is generated. Therefore, a flue gas system is designed for the converter to extract the flue gas generated during the smelting process of the converter through the flue gas system. The flue gas system is mainly divided into two parts, as Figure 1 shown. The first part is a fixed hood 14, which is located above the mouth of the converter 12. The second part is a movable hood 13, which can move up and down. Its function is that during the smelting process of the converter 12, the movable hood 13 descends to minimize the gap between the movable hood 13 and the mouth of the converter 12 as much as possible to reduce the leakage of flue gas and improve the suction capacity of the flue gas. During the tapping or charging process of the converter 12, the movable hood 13 is lifted to prevent the converter 12 from rotating and scratching the movable hood 13. Since the flue gas generated during the smelting process of the converter 12 is as high as more than a thousand degrees, the entire hood system also needs to be cooled, generally by water cooling. Therefore, the movable hood 13 is provided with a water inlet pipe and a water outlet pipe (also called a lifting pipe 2). Since the movable hood 13 needs to move up and down, the water inlet pipe and the water outlet pipe also move up and down accordingly. Then, the connection between the lifting pipe 2 and the ground 1 cannot be completely sealed, and there must be a movable gap 3. The flue gas from the converter 12 may leak from the movable gap 3, causing great potential safety hazards. Summary of the Utility Model

[0003] The purpose of the utility model is to solve the problems put forward in the above background art, and provide a sealing device for a lifting pipe of a converter movable hood, which seals the movable gap between the lifting pipe and the ground, thereby eliminating the risk of leakage of converter flue gas from this place.

[0004] The specific technical solution of the utility model is as follows: A sealing device for a lifting pipe of a converter movable hood includes a lifting pipe passing through the ground. There is a movable gap between the lifting pipe and the ground. Above the ground, there is a water seal mechanism. The water seal mechanism includes an inner cylinder and an outer cylinder arranged coaxially. The movable gap is located inside the inner cylinder. There is a circular water seal groove between the inner cylinder and the outer cylinder. The bottoms of the inner cylinder and the outer cylinder are hermetically connected to the ground. The lifting pipe passes upward through the inner cylinder and is sleeved with a sealing plate. The sealing plate is hermetically connected to the lifting pipe. The sealing plate is provided with a circular insertion plate along the circumference. The circular insertion plate is inserted into the water seal groove. A certain height of water is contained in the water seal groove.

[0005] Preferably, a water inlet pipe is provided at the upper end of the water seal groove, and a sewage discharge pipe is provided at the lower end of the water seal groove.

[0006] Preferably, a liquid level gauge is installed in the water seal tank, and control valves are installed on both the water inlet pipe and the sewage discharge pipe. The control valves and the liquid level gauge are jointly connected to a control system, and the liquid level of the sealing water in the water seal tank is controlled through the control system.

[0007] Preferably, the sealing device further includes a circulating water system, which includes a reservoir and a sewage sedimentation tank. The reservoir is provided with a drain pipe, and the drain pipe is connected to the water inlet pipe of the water seal tank through a pipeline. The water inlet of the sewage sedimentation tank is connected to the sewage discharge pipe of the water seal tank through a pipeline.

[0008] Preferably, a return pipe is provided at the upper clear water part of the sewage sedimentation tank, the return pipe is connected to the reservoir, and a water pump is installed on the return pipe.

[0009] The beneficial effects of the present utility model are as follows: When the lifting pipe moves up and down with the movable hood, the annular insertion plate is always inserted into the water seal tank. Through the water seal, the converter flue gas leaking from the movable gap can only stay in the sealing device and cannot leak outwards. Description of the Drawings

[0010] Figure 1 is a schematic structural diagram of the present utility model;

[0011] Figure 2 is Figure 1 the enlarged view at position V of

[0012] Figure 3 is a schematic diagram of the circulating water system of the present utility model;

[0013] In the figure: 1, ground; 2, lifting pipe; 3, movable gap; 4, outer cylinder; 5, inner cylinder; 6, water seal tank; 7, water inlet pipe; 8, annular insertion plate; 9, sealing plate; 10, liquid level gauge; 11, sewage discharge pipe; 12, converter; 13, movable hood; 14, fixed hood; 15, sewage sedimentation tank; 16, return pipe; 17, reservoir. Detailed Embodiment

[0014] Referring to Figures 1-3 , this embodiment is a sealing device for the lifting pipe of a converter movable hood, including a lifting pipe 2 passing through the ground 1. There is a movable gap 3 between the lifting pipe 2 and the ground 1. Above the ground 1, there is a water seal mechanism, and the water seal mechanism includes an inner cylinder 5 and an outer cylinder 4 arranged coaxially. The movable gap 3 is located inside the inner cylinder 5. There is a circular water seal tank 6 between the inner cylinder 5 and the outer cylinder 4. The bottoms of the inner cylinder 5 and the outer cylinder 4 are hermetically connected to the ground 1. The lifting pipe 2 passes upward through the inner cylinder 5 and is sleeved with a sealing plate 9. The sealing plate 9 is hermetically connected to the lifting pipe 2. The sealing plate 9 is provided with a circular annular insertion plate 8 along the circumference, and the annular insertion plate 8 is inserted into the water seal tank 6. A certain height of water is contained in the water seal tank 6.

[0015] Preferably, a water inlet pipe 7 is provided at the upper end of the water seal tank 6, and a sewage discharge pipe 11 is provided at the lower end of the water seal tank 6.

[0016] Preferably, a liquid level gauge 10 is installed in the water seal tank 6, and control valves are installed on both the water inlet pipe 7 and the sewage discharge pipe 11. The control valves and the liquid level gauge 10 are jointly connected to a control system, and the liquid level of the sealing water in the water seal tank 6 is controlled through the control system; when the water level in the water seal tank 6 is too high, the control valve of the sewage discharge pipe 11 is automatically opened to drain water, and when the water level in the water seal tank 6 is too low, the control valve of the water inlet pipe 7 is automatically opened to replenish water into the water seal tank 6.

[0017] Preferably, the sealing device further includes a circulating water system, which includes a reservoir 17 and a sewage sedimentation tank 15. The reservoir 17 is provided with a drain pipe, and the drain pipe is connected to the water inlet pipe 7 of the water seal tank 6 through a pipeline. The water inlet of the sewage sedimentation tank 15 is connected to the sewage discharge pipe 11 of the water seal tank 6 through a pipeline.

[0018] Preferably, a return pipe 16 is provided at the upper clear water part of the sewage sedimentation tank 15, the return pipe 16 is connected to the reservoir 17, and a water pump is installed on the return pipe 16.

[0019] The working principle of the present utility model is as follows: during the production process, when the movable hood 13 of the converter 12 rises, the lifting pipe 2 rises accordingly, and the sealing plate 9 and the annular insertion plate 8 also rise together with the lifting pipe 2. However, the bottom end of the annular insertion plate 8 still inserts into the water in the water seal tank 6 to form a relatively closed space. Conversely, when the movable hood 13 descends, the sealing plate 9 and the annular insertion plate 8 move downward accordingly, and the depth of the annular insertion plate 8 inserted into the water seal tank 6 becomes deeper. The heights of the water seal tank 6 and the annular insertion plate 8 match the rising or falling stroke of the movable hood 13, so as to ensure that when the movable hood 13 moves up and down, the annular insertion plate 8 always inserts into the water seal tank 6 to form a sealed space, thereby preventing the flue gas of the converter 12 from leaking outwards.

[0020] The water in the water seal tank 6 is discharged into the sewage sedimentation tank 15 through the sewage discharge pipe 11. The reservoir 17 replenishes water into the water seal tank 6 through the water inlet pipe 7. After the sewage sedimentation tank 15 settles for a certain period of time, the clear water at the upper end flows back into the reservoir 17 through the water pump and the return pipe 16.

Claims

1. A sealing device for a converter movable smoke hood lifting pipe, comprising a lifting pipe passing through the ground, with a movable gap provided between the lifting pipe and the ground, characterized in that: A water seal mechanism is provided above the ground, and the water seal mechanism includes an inner cylinder and an outer cylinder arranged coaxially, the movable gap is located on the inner side of the inner cylinder, a circle of annular water seal groove is provided between the inner cylinder and the outer cylinder, the bottom of the inner cylinder and the outer cylinder are sealed and connected to the ground, the lifting pipe passes upward from the inner cylinder and is covered with a sealing plate, the sealing plate and the lifting pipe are sealed, a circle of annular plug plates are provided along the circumference of the sealing plate, the annular plug plates are inserted in the water seal groove, and a certain height of water is filled in the water seal groove.

2. A sealing device for a converter movable smoke hood lifting pipe according to claim 1, characterized in that: A water inlet pipe is arranged at the upper end of the water seal groove, and a sewage discharge pipe is arranged at the lower end of the water seal groove.

3. A sealing device for a converter movable smoke hood lifting pipe according to claim 2, characterized in that: The water seal tank is equipped with a liquid level gauge, and the water inlet pipe and the sewage pipe are both equipped with control valves. The control valve and the liquid level gauge are connected to a control system, and the liquid level of the sealing water in the water seal tank is controlled by the control system.

4. A sealing device for a converter movable smoke hood lifting pipe according to claim 3, characterized in that: The sealing device also includes a circulating water system, which includes a water storage tank and a sewage sedimentation tank. The water storage tank is provided with a drain pipe, which is connected to the water inlet pipe of the water seal tank through a pipeline. The water outlet of the sewage sedimentation tank is connected to the sewage pipe of the water seal tank through a pipeline.

5. A sealing device for a converter movable smoke hood lifting pipe according to claim 4, characterized in that: A return pipe is provided at the clean water part at the upper end of the sewage sedimentation tank. The return pipe is connected to the water storage tank and a water pump is installed on the return pipe.

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