Novel furnace cover structure for refining furnace

Abstract

The utility model provides a novel furnace cover structure for a refining furnace, which comprises a furnace cover body, the furnace cover body comprises an upper conical section and a lower cylindrical section, an annular connecting plate is arranged in the middle of the conical section, and a plurality of air blowpipes which are uniformly distributed around the center of the connecting plate are arranged on the connecting plate. The air blowing pipe penetrates through the connecting plate, the end of the air blowing pipe extends towards the interior of the conical section, a plurality of air blowing holes are formed in the circumferential direction of the air blowing pipe, and high-pressure air can be sprayed out towards the inner wall of the conical section through the air blowing holes of the air blowing pipe, so that the inner wall of the furnace cover is cleaned; the furnace cover is reasonable in design structure and convenient to use, the blowing pipe capable of introducing high-pressure air is designed on the furnace cover, after the furnace cover is used for a period of time, dust and other impurities attached to and deposited on the inner wall of the furnace cover can be cleaned through the high-pressure air, and the situation that the cooling efficiency is reduced due to the dust and other impurities is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel refining equipment, and in particular relates to a new furnace cover structure for a refining furnace. Background Art

[0002] A refining furnace is a device that uses three-phase alternating current to process molten steel. There are many designs of the furnace cover. One is made of all refractory bricks. This type of furnace cover has poor temperature control and cooling effects, and is also prone to collapse. In order to solve the problem of poor cooling effects, water cooling is also used in the prior art to cool the furnace cover. However, after long-term use, the existing refining furnace cover often accumulates dust and impurities on the pipes and structural surfaces, which not only affects the cooling efficiency of the furnace cover, but may also cause damage to the furnace cover structure. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a new furnace cover structure for a refining furnace, which has a reasonable design structure and is easy to use. A blowing pipe for letting in high-pressure air is designed on the furnace cover. After the furnace cover has been used for a period of time, the dust and other impurities attached to and deposited on the inner wall of the furnace cover can be cleaned by the high-pressure air, thereby preventing the cooling efficiency from being reduced due to the dust and other impurities.

[0004] The technical solution adopted by the utility model is: a new type of furnace cover structure for a refining furnace, including a furnace cover body, the furnace cover body including an upper conical section and a lower cylindrical section, an annular connecting plate is installed at the middle position of the conical section, a plurality of blowing pipes evenly distributed around the center of the connecting plate are installed on the connecting plate, the blowing pipes pass through the connecting plate and the ends extend toward the inner direction of the conical section, a plurality of blowing holes are opened in the circumferential direction of the blowing pipes, and high-pressure air can be sprayed toward the inner wall direction of the conical section through the blowing holes of the blowing pipes, thereby cleaning the inner wall of the furnace cover.

[0005] The center of the air blowing pipe has a non-through center hole, a plurality of air blowing holes are evenly distributed in the circumferential direction of the air blowing pipe and are connected to the center hole, and the center lines of the air blowing holes and the center line of the air blowing pipe are arranged at an angle to each other.

[0006] The outer wall of the air blowing pipe is provided with a limiting step protruding outwards, and the outside of the air blowing pipe is provided with an external thread, and the air blowing pipe is threadedly connected with the connecting plate.

[0007] The conical section and the cylindrical section of the furnace cover body both include a number of water-cooling coils welded in sequence, the two ports of the water-cooling coils are connected with baffles, and water inlets and water outlets are respectively provided at both ends of the water-cooling coils, the water inlet is connected to the water inlet pipe installed on the furnace cover body, and the water outlet is connected to the water outlet pipe installed on the furnace cover body.

[0008] A ventilation main pipe is fixed above the conical section, and the ventilation main pipe is connected with the air blowing pipe through a pipeline.

[0009] The furnace cover body also includes a small furnace cover installed above the conical section, and a plurality of electrode holes evenly distributed around the center of the small furnace cover are opened on the surface of the small furnace cover.

[0010] The beneficial effects of the utility model are:

[0011] The utility model has a reasonable design structure and is easy to use. A blowing pipe for letting in high-pressure air is designed on the furnace cover. After the furnace cover has been used for a period of time, the dust and other impurities attached to and deposited on the inner wall of the furnace cover can be cleaned by the high-pressure air to prevent the cooling efficiency from being reduced due to the dust and other impurities. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0013] Figure 2 It is a top view of the utility model;

[0014] Figure 3 This is a structural diagram of the connection between a single water cooling coil and a baffle of the utility model;

[0015] Figure 4 For this utility model Figure 1 A partial enlarged view of

[0016] Figure 5 It is a cross-sectional view of the air blowing pipe of the utility model.

[0017] Markings in the figure: 1. Cylindrical section; 2. Conical section; 3. Small furnace cover; 4. Electrode hole; 5. Water inlet pipe; 6. Water outlet pipe; 7. Water cooling coil; 8. Baffle; 9. Water inlet; 10. Water outlet; 11. Air blowing pipe; 1101. Limiting step; 1102. External thread; 1103. Center hole; 1104. Air blowing hole; 12. Connecting plate; 13. Ventilation main pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1-5As shown, a new type of furnace cover structure for a refining furnace includes a furnace cover body, the furnace cover body includes an upper conical section 2 and a lower cylindrical section 1, an annular connecting plate 12 is installed at the middle position of the conical section 2, and a plurality of blowing pipes 11 evenly distributed around the center of the connecting plate 12 are installed on the connecting plate 12, the blowing pipes 11 pass through the connecting plate 12 and the ends extend toward the inner direction of the conical section 2, and a plurality of blowing holes 1104 are opened in the circumferential direction of the blowing pipes 11, and high-pressure air can be sprayed toward the inner wall of the conical section 2 through the blowing holes 1104 of the blowing pipes 11, so as to clean the inner wall of the furnace cover, that is, the dust and other impurities accumulated on the inner wall of the furnace cover can be quickly cleaned by blowing.

[0020] The center of the air blowing tube 11 has a non-through center hole 1103, and a plurality of air blowing holes 1104 are evenly distributed in the circumferential direction of the air blowing tube 11 and are connected to the center hole 1103. The center line of the air blowing hole 1104 is set at an angle to the center line of the air blowing tube 11. Figure 5 As shown, after the air blowing pipe 11 is installed on the connecting plate 12, the blowing direction of the air hole 1104 is the inner wall direction of the furnace cover body, and the number of the air blowing holes 1104 is set to at least three. In addition, more air blowing holes 1104 can be set according to the diameter of the air blowing pipe 11. The more the number of air blowing holes 1104, the better the cleaning effect of the dust on the inner wall of the furnace cover.

[0021] The outer wall of the air blowing pipe 11 is provided with an outwardly protruding limiting step 1101, and the outside of the air blowing pipe 11 is provided with an external thread 1102. The air blowing pipe 11 is threadedly connected to the connecting plate 12 to achieve a detachable connection of the air blowing pipe 11, which can facilitate the replacement of the air blowing pipe 11.

[0022] The conical section 2 and the cylindrical section 1 of the furnace cover body both include a number of water-cooling coils 7 welded in sequence, the two ports of the water-cooling coils 7 are connected with baffles 8, and the two ends of the water-cooling coils 7 are respectively provided with a water inlet 9 and a water outlet 10, the water inlet 9 is connected to the water inlet pipe 5 installed on the furnace cover body, and the water outlet 10 is connected to the water outlet pipe 6 installed on the furnace cover body, wherein the baffle 8 is provided for two purposes: on the one hand, to connect and reinforce multiple water-cooling coils 7 so that the overall structure of the furnace cover body is strengthened, and on the other hand, to block the two end ports of a single water-cooling coil 7 to prevent the water-cooling coil 7 from forming a ring-shaped channel as a whole after the two ends are connected.

[0023] A ventilation pipe 13 is fixed above the conical section 2, and the ventilation pipe 13 is connected to the air blowing pipe 11 through a pipeline. The ventilation pipe 13 is also connected to an air pipe, and the air pipe can be connected to an external air source to realize the transmission of high-pressure air.

[0024] The furnace cover body also includes a small furnace cover 3 installed above the conical section 2. The surface of the small furnace cover 3 is provided with a plurality of electrode holes 4 evenly distributed around the center of the small furnace cover 3. In addition, a charging port and a smoke exhaust port structure can also be provided on the small furnace cover 3 to achieve normal use of the furnace cover. This part of the structure is the same as the structural principle of the small furnace cover 3 in the prior art and will not be elaborated on here.

[0025] When the new furnace cover structure of the refining furnace is in use, the water inlet pipe 5 is connected to an external water source, and the cooling water enters into each water-cooling coil 7 through the water inlet pipe 5, and is finally discharged from the water outlet pipe 6 to realize a water circulation cooling process. In this process, the furnace cover can be cooled to prevent the furnace cover from being overheated. After a period of use, the ventilation pipe 13 is connected to an external air source, and high-pressure air enters into each blowing pipe 11 through the ventilation pipe 13, and then is ejected outward from the blowing hole 1104 of the blowing pipe 11. The ejected high-pressure air can be blown toward the inner wall of the furnace cover, thereby cleaning up impurities such as dust accumulated on the inner wall of the furnace cover, and avoiding the problem of poor cooling effect of the furnace cover due to excessive dust in the future.

[0026] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of furnace cover structure for a refining furnace, characterized in that: The furnace cover body includes a conical section at the top and a cylindrical section at the bottom. An annular connecting plate is installed at the middle position of the conical section. A plurality of blowing pipes evenly distributed around the center of the connecting plate are installed on the connecting plate. The blowing pipes pass through the connecting plate and the ends extend toward the inside of the conical section. A plurality of blowing holes are opened in the circumferential direction of the blowing pipes. High-pressure air can be sprayed toward the inner wall of the conical section through the blowing holes of the blowing pipes, thereby cleaning the inner wall of the furnace cover.

2. The novel furnace cover structure for a refining furnace according to claim 1 is characterized in that: The center of the air blowing pipe is provided with a non-through center hole, a plurality of air blowing holes are evenly distributed in the circumferential direction of the air blowing pipe and are connected with the center hole, and the center lines of the air blowing holes and the center line of the air blowing pipe are arranged at an angle to each other.

3. The novel furnace cover structure for a refining furnace according to claim 1 is characterized in that: An outwardly protruding limiting step is arranged on the outer wall of the air blowing pipe, an external thread is arranged on the outside of the air blowing pipe, and the air blowing pipe is threadedly connected with the connecting plate.

4. The novel furnace cover structure for a refining furnace according to claim 1 is characterized in that: The conical section and the cylindrical section of the furnace cover body both include a number of water-cooling coils welded in sequence, the two ports of the water-cooling coils are connected with baffles, and water inlets and water outlets are respectively provided at both ends of the water-cooling coils, the water inlet is connected to the water inlet pipe installed on the furnace cover body, and the water outlet is connected to the water outlet pipe installed on the furnace cover body.

5. The novel furnace cover structure for a refining furnace according to claim 1 is characterized in that: A ventilation main pipe is fixed above the conical section, and the ventilation main pipe is connected with the air blowing pipe through a pipeline.

6. The novel furnace cover structure for a refining furnace according to claim 1 is characterized in that: The furnace cover body also comprises a small furnace cover installed above the conical section, and a plurality of electrode holes evenly distributed around the center of the small furnace cover are opened on the surface of the small furnace cover.

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