CN209763755U - EAF big furnace lid - Google Patents
EAF big furnace lid Download PDFInfo
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- CN209763755U CN209763755U CN201920277412.8U CN201920277412U CN209763755U CN 209763755 U CN209763755 U CN 209763755U CN 201920277412 U CN201920277412 U CN 201920277412U CN 209763755 U CN209763755 U CN 209763755U
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- ring pipe
- ring
- pipe
- inner ring
- outer ring
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Abstract
The utility model discloses a big bell of EAF relates to the steelmaking equipment field. The electrode rod feeding device comprises an inner ring pipe and an outer ring pipe which are sequentially and outwards arranged by taking the same axis as an axis, wherein an electrode rod channel is arranged at the center of the inner ring pipe, a feeding hole is formed in the outer ring pipe, a first supporting plate is arranged at the top of the outer ring pipe, a second supporting plate is arranged at the top of the inner ring pipe, and the first supporting plate and the second supporting plate are detachably connected. The utility model has the advantages of saving cost, prolonging service life and high stability.
Description
Technical Field
The utility model relates to a steelmaking equipment field, more specifically say, it relates to a big bell of EAF.
Background
Electric furnace steelmaking mainly utilizes arc heat, and the temperature in an arc action area is as high as 4000 ℃. In the smelting process, because metal in a molten state in the furnace is easy to sputter, a furnace cover is required to be additionally arranged at the top end of the electric furnace.
The utility model discloses a furnace cover of a steel-making electric furnace in the Chinese utility model with the publication number of CN201809386U, which mainly comprises a cover body, wherein the cover body is provided with a hanging ring and three electrode holes, the three electrode holes are arranged in a regular triangle, and the cross section of the cover body is a triangle with a sharp corner connected by an arc; the number of the lifting rings is three, the lifting rings are also arranged in a regular triangle, and each lifting ring is positioned between two electrode holes.
The above prior art solutions have the following drawbacks: in actual production, as the electric furnace cover needs to be opened for charging materials frequently, the electric furnace cover is inevitably contacted with the electrode bar, and the contact part of the electric furnace cover and the electrode bar is easy to be punctured, so that the whole electric furnace cover is damaged, and the service life of the electric furnace cover is reduced; meanwhile, the electric furnace cover is generally a whole, so that the whole electric furnace cover can be replaced only by partially puncturing the electric furnace cover, and the cost is extremely high.
SUMMERY OF THE UTILITY MODEL
an object of the utility model is to provide an EAF big bell, it has the cost-effective, increase of service life, advantage that stability is high.
In order to achieve the above purpose, the utility model provides a following technical scheme:
The utility model provides an EAF big bell, includes inner ring pipe and outer ring pipe that uses same axis to outwards set up in proper order as the axle center, inner ring pipe center is provided with the electrode bar passageway, be provided with the charge door on the ring pipe, the top of ring pipe is provided with first backup pad, the top of inner ring pipe is provided with the second backup pad, first backup pad can be dismantled with the second backup pad and be connected.
By adopting the technical scheme, in the steelmaking process, the electrode rod is inserted into the steelmaking furnace from the electrode rod channel, and after the electrode rod breaks through the large furnace cover, only the first support plate of the large furnace cover and the inner ring pipe need to be detached for replacement, so that the whole large furnace cover does not need to be replaced, and a large amount of cost is saved; because the inner ring pipe and the first supporting plate can be detached and replaced, the original smelting furnace can be replaced by prolonging the service life of the furnace cover as long as the whole replaced furnace cover is needed.
furthermore, first backup pad and the second backup pad one side in opposite directions are protruding respectively and are had the solid fixed ring of first solid fixed ring and second, the solid fixed ring of first solid fixed ring and second passes through the bolt and the nut is fixed.
Through adopting above-mentioned technical scheme, first solid fixed ring can separate with the solid fixed ring of second, has saved a large amount of costs, has greatly prolonged the life of big bell.
Furthermore, between first solid fixed ring and the first backup pad, be provided with first strengthening rib between solid fixed ring of second and the second backup pad.
Through adopting above-mentioned technical scheme, improve between first solid fixed ring and the first backup pad, the joint strength between solid fixed ring of second and the second backup pad avoids breaking.
Furthermore, the inner ring pipe is obliquely distributed in the direction away from the outer ring pipe, one end of the inner ring pipe away from the outer ring pipe is vertically distributed, and a reinforcing rod is arranged at one end of the inner ring pipe away from the outer ring pipe.
Through adopting above-mentioned technical scheme, the electrode bar can not directly take place the contact with the inner ring pipe, and the electrode bar can contact with the reinforcing rod, prolongs the life of inner ring pipe, and the inner ring pipe is difficult to be punctured and causes and leak, improves production stability.
Furthermore, a second reinforcing rib is arranged between the reinforcing rod and the inner ring pipe.
Through adopting above-mentioned technical scheme, the joint strength between second strengthening rib reinforcing rod and the inner ring pipe avoids taking place the brittle failure, improves connection stability.
Further, the inner ring pipe comprises a plurality of branch pipes which are not communicated.
By adopting the technical scheme, the temperature in the steelmaking furnace is extremely high during steelmaking, so that the temperature of the large furnace cover is also very high, the cooling water in the inner ring pipe is completely evaporated before surrounding for a circle, and the cooling steam after evaporation can not play a role in cooling. The cooling water flows back through the plurality of branch pipes which are not communicated with each other, the flowing distance of the cooling water in the branch pipes is shortened, the cooling water can effectively play a role in cooling, and the service life of the inner ring pipe is prolonged.
Furthermore, the end, far away from first solid fixed ring, of outer ring pipe and first backup pad is provided with the kink, the kink is to keeping away from a lateral buckling of first solid fixed ring, is located the one end that the inner ring pipe was kept away from to outer ring pipe in the kink is provided with the reinforcing ring.
By adopting the technical scheme, because the bottom end of the bent part of the large furnace cover is closed with the steel-making furnace cover during steel making, molten metal liquid is easy to sputter from the closed part, the outer ring pipe at the closed part is easy to damage after being contacted with the molten metal liquid for a long time, and cooling water is easy to leak to influence production. The reinforcing ring can separate the molten metal from the outer ring pipe, the outer ring pipe cannot be in direct contact with the metal, and the service life of the outer ring pipe is prolonged.
Furthermore, one side of the reinforcing ring, which is far away from the outer ring pipe, is provided with a padding ring.
By adopting the technical scheme, the heightening ring can heighten the whole height of the furnace cover, so that the outer ring pipe is not in direct contact with the steel-making furnace, the service life of the outer ring pipe is prolonged, and the stability of steel making is improved.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) By arranging the first supporting plate and the first fixing ring as well as the second supporting plate and the second fixing ring, the inner ring pipe and the outer ring pipe can be detached, the inner ring pipe can be detached for replacement when the electrode bar punctures the inner ring pipe, the whole furnace cover does not need to be replaced, the cost is saved, and the service life is prolonged; the first reinforcing ribs are arranged, so that the stability of the first fixing ring and the second fixing ring is improved;
(2) By arranging the reinforcing plate and the second reinforcing ribs, the reinforcing rod can play a role of protecting the inner ring pipe, the service life of the inner ring pipe is prolonged, and the second reinforcing ribs can improve the stability of the reinforcing rod; the reinforcing ring and the heightening ring are arranged, so that the outer ring pipe can be protected, the service life of the outer ring pipe is prolonged, and the stability of the outer ring pipe is improved;
(3) The inner ring pipe is divided into a plurality of branch pipes, so that the cooling efficiency of the furnace cover is ensured.
Drawings
FIG. 1 is an overall view of the present embodiment;
FIG. 2 is an enlarged view of portion A of FIG. 1;
3 FIG. 3 3 3 is 3 a 3 schematic 3 partial 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 plane 3 A 3- 3 A 3 of 3 FIG. 3 1 3 ( 3 with 3 the 3 branch 3 tubes 3 highlighted 3) 3; 3
3 FIG. 3 4 3 is 3 a 3 schematic 3 partial 3 cross 3- 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3 of 3 FIG. 3 1 3 ( 3 showing 3 the 3 reinforcement 3 ring 3 and 3 the 3 raised 3 rim 3) 3. 3
Reference numerals: 1. an inner ring pipe; 2. an outer ring pipe; 3. an electrode rod channel; 4. a feed inlet; 5. a first support plate; 6. a second support plate; 7. a first retaining ring; 8. a second retaining ring; 9. a first reinforcing rib; 10. a reinforcing rod; 11. a second reinforcing rib; 12. a branch pipe; 13. a bending section; 14. a reinforcing ring; 15. and a heightening ring.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1 and 2, an EAF furnace lid includes an inner annular tube 1 and an outer annular tube 2, which are sequentially disposed outward with the same axis as an axis. Referring to fig. 1 and 3, the inner loop 1 includes a plurality of branch pipes 12 which are not connected to each other, and cooling water is introduced into the branch pipes 12 to effectively reduce the temperature of the inner loop 1. All the branch pipes 12 are arranged in a snake shape, and all the branch pipes surround to form a circle and form an electrode rod channel 3 in the center of the circle. The welding of the top of inner ring pipe 1 has second backup pad 6, and second backup pad 6 is the slope setting with inner ring pipe 1 to keeping away from outer ring pipe 2 orientation, and second backup pad 6 upwards is vertical distribution with the one end that outer ring pipe 2 was kept away from to inner ring pipe 1.
Referring to fig. 2, one side of the inner ring pipe 1, which is located at the vertical end and is far away from the second supporting plate 6, is welded with a reinforcing rod 10, the reinforcing rod 10 is arranged in an annular shape, the main material of the reinforcing rod 10 in the embodiment is Q235 steel, the electrode rod can contact with the reinforcing rod 10, and the service life of the inner ring pipe 1 is prolonged. And a second reinforcing rib 11 is arranged between the reinforcing rod 10 and the inner ring pipe 1, and the second reinforcing rib 11 can enhance the connection strength between the reinforcing rod 10 and the inner ring pipe 1.
The one end welding that vertical end was kept away from to the tip of second backup pad 6 has the solid fixed ring 8 of second parallel with vertical end, and the solid fixed ring 8 of second is located the upper surface of second backup pad 6. The welding has first strengthening rib 9 between the solid fixed ring 8 of second and the second backup pad 6, and first strengthening rib 9 can improve the joint strength between the solid fixed ring 8 of second and the second backup pad 6, avoids taking place the brittle failure.
Referring to fig. 1 and 2, a feed opening 4 is provided on the outer ring pipe 2, and the outer ring pipe 2 is disposed on the periphery of the feed opening 4 in a serpentine shape, so that the cooling water in the outer ring pipe 2 cannot flow out from the feed opening 4. The welding of the top of outer ring pipe 2 has first backup pad 5, and the welding of the one end that first backup pad 5 is close to first solid fixed ring 7 has the solid fixed ring 8 of second parallel with first solid fixed ring 7, and the solid fixed ring 8 of second is located the upper surface of first backup pad 5, and first solid fixed ring 7 passes through bolt and nut fixed connection with the solid fixed ring 8 of second. Interior ring canal 1 and outer ring canal 2 can separate through first solid fixed ring 7 and the solid fixed ring 8 of second, puncture the back at the big bell at the electrode bar, only need with the first backup pad 5 of big bell with interior ring canal 1 dismantle get off change can, need not to change whole big bell, save the cost, prolong the life of big bell.
A first reinforcing rib 9 is welded between the first fixing ring 7 and the first supporting plate 5. First strengthening rib 9 can improve the joint strength between first solid fixed ring 7 and first backup pad 5, avoids taking place the brittle failure.
Referring to fig. 2 and 4, a bending portion 13 is disposed at an end of the outer ring 2 and an end of the first support plate 5 away from the first fixing ring 7, and the bending portion 13 is vertically bent toward a side away from the first fixing ring 7. And a reinforcing ring 14 is welded at one end, far away from the inner ring pipe 1, of the outer ring pipe 2 in the bent part 13, and the main material of the reinforcing ring 14 is Q235 steel. The reinforcing ring 14 is capable of blocking the molten metal liquid outside the outer collar 2, extending the service life of the outer collar 2. One side of the reinforcing ring 14, which is far away from the outer ring pipe 2, is welded with a padding ring 15, and the padding ring 15 enables the outer ring pipe 2 to be far away from the steel-making furnace, so that the leakage of cooling water in the outer ring pipe 2 is avoided, and the stability of the steel-making process is improved.
The utility model discloses a working process and beneficial effect as follows: in the steel making process, the big furnace cover is covered on the steel making furnace, so that the bottommost end of the heightening ring 15 is covered with the steel making furnace cover. The electrode rod is inserted into the steel-making furnace from the electrode rod channel 3, and then cooling water is introduced into the inner ring pipe 1 and the outer ring pipe 2, so that the temperature of the furnace cover can be reduced in the steel-making process. When feeding is required, feeding is performed through the feeding port 4. When the big furnace cover is contacted with the electrode bar, the electrode bar can be contacted with the reinforcing bar 10 on the big furnace cover, and the inner ring pipe 1 can not be directly punctured. After the inner ring pipe 1 is punctured by the electrode rod, only need with first backup pad 5 with inner ring pipe 1 dismantle get off change can, need not to change whole big bell, saved a large amount of costs, originally refine 500 stoves and just need whole big bell of changing can prolong to 2800 stoves more than the change again, greatly prolonged the life of big bell.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The EAF furnace cover comprises an inner ring pipe (1) and an outer ring pipe (2) which are sequentially and outwards arranged by taking the same axis as an axis, wherein an electrode rod channel (3) is arranged at the center of the inner ring pipe (1), and the EAF furnace cover is characterized in that a feeding hole (4) is formed in the outer ring pipe (2), a first supporting plate (5) is arranged at the top of the outer ring pipe (2), a second supporting plate (6) is arranged at the top of the inner ring pipe (1), and the first supporting plate (5) is detachably connected with the second supporting plate (6).
2. The EAF furnace cover according to claim 1, wherein a first fixing ring (7) and a second fixing ring (8) are respectively protruded from one side of the first support plate (5) opposite to one side of the second support plate (6), and the first fixing ring (7) and the second fixing ring (8) are fixed with nuts through bolts.
3. An EAF furnace lid according to claim 2, wherein a first reinforcement rib (9) is provided between the first fixing ring (7) and the first support plate (5) and between the second fixing ring (8) and the second support plate (6).
4. The EAF furnace cover according to claim 1, wherein the inner ring pipe (1) is distributed in an inclined way in the direction far away from the outer ring pipe (2), one end of the inner ring pipe (1) far away from the outer ring pipe (2) is distributed in a vertical way, and one end of the inner ring pipe (1) far away from the outer ring pipe (2) is provided with a reinforcing rod (10).
5. An EAF furnace lid according to claim 4 characterized in that a second reinforcement rib (11) is provided between the reinforcement bar (10) and the inner ring tube (1).
6. an EAF furnace lid according to claim 1, wherein the inner pipe (1) comprises a plurality of branch pipes (12) which are not connected to each other.
7. An EAF furnace lid according to claim 2, characterized in that the outer ring (2) and the end of the first support plate (5) away from the first fixing ring (7) are provided with a bending part (13), the bending part (13) is bent to the side away from the first fixing ring (7), and the end of the outer ring (2) away from the inner ring (1) within the bending part (13) is provided with a reinforcing ring (14).
8. an EAF furnace lid according to claim 7, wherein the side of the reinforcement ring (14) facing away from the outer collar is provided with an elevated ring (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920277412.8U CN209763755U (en) | 2019-03-05 | 2019-03-05 | EAF big furnace lid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920277412.8U CN209763755U (en) | 2019-03-05 | 2019-03-05 | EAF big furnace lid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209763755U true CN209763755U (en) | 2019-12-10 |
Family
ID=68753843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920277412.8U Active CN209763755U (en) | 2019-03-05 | 2019-03-05 | EAF big furnace lid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209763755U (en) |
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2019
- 2019-03-05 CN CN201920277412.8U patent/CN209763755U/en active Active
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