CN111690817B - Novel airtight protective cover device of electroslag furnace - Google Patents
Novel airtight protective cover device of electroslag furnace Download PDFInfo
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- CN111690817B CN111690817B CN202010664432.8A CN202010664432A CN111690817B CN 111690817 B CN111690817 B CN 111690817B CN 202010664432 A CN202010664432 A CN 202010664432A CN 111690817 B CN111690817 B CN 111690817B
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- smoke hood
- sealing ring
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Furnace Details (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a novel airtight protection cover device for an electroslag furnace, which comprises an upper smoke hood, wherein a middle smoke hood and a lower smoke hood are sequentially arranged at the lower end of the upper smoke hood, a clamping jaw is arranged on the outer side of the middle smoke hood, a lifting arm is arranged on one side of the clamping jaw, an inflatable sealing ring is arranged between the middle smoke hood and the upper smoke hood, the inflatable sealing ring is a hollow silicon rubber sealing ring, an inflatable cavity is arranged inside the inflatable sealing ring, and an air inlet nozzle is arranged on one side of the surface of the inflatable sealing ring. The invention has the advantages that a three-section smoke hood combination mode is adopted, and the sealing element structure is arranged among the three sections of smoke hoods to ensure the air tightness of the whole device, and the oxygen content in the smelting space can be well controlled to be reduced to the minimum through the device, so that the quality and the yield of the smelted steel ingot are improved, the usage amount of required protective gas is greatly reduced in the smelting process, and the production cost and the safety risk are effectively reduced.
Description
Technical Field
The invention relates to the technical field of metallurgical equipment, in particular to a novel airtight protection cover device of an electroslag furnace.
Background
The electroslag furnace is a special smelting device which utilizes remelting current to generate heat energy to melt a consumable electrode inserted into a slag bath, and metal molten drops are crystallized into electroslag ingots in a water-cooled crystallizer after being cleaned by slag liquid. Electroslag furnace is essential production equipment for special steel mills. Most electroslag furnaces are open, air humidity is high, the steel ingot can generate air hole defects, hydrogen content is increased, white spots can be generated if hydrogen content in steel is high, and accordingly scrapping and loss are caused. Therefore, gas protection measures should be taken during electroslag remelting.
In the traditional single-upright-post supporting-arm type and double-upright-post rotary supporting-arm type double-station electroslag furnace in China, a supporting arm holder clamps a dummy electrode and a metal electrode, and a transmission device is controlled to rotate a T-shaped lead screw to drive a roller cantilever to move up and down to finish smelting.
At present, in the coaxial electroslag furnace which is designed by domestic research or imported abroad, some equipment is not provided with a protective cover device, the protective cover device of some equipment is in a two-door or four-door mode and a protective cover mode with other structures, and the integral air tightness effect is poor. Resulting in the quality and yield reduction of the smelted steel ingot. At present, a plurality of steel enterprises adopt to increase the gas supply amount of protective gas (argon) to reduce the oxygen content in a smelting space, thereby improving the production cost and the safety risk.
Disclosure of Invention
The invention aims to solve the problems and designs a novel airtight protective cover device of an electroslag furnace.
The technical scheme of the invention is that the novel airtight protection cover device for the electroslag furnace comprises an upper smoke hood, wherein a middle smoke hood and a lower smoke hood are sequentially arranged at the lower end of the upper smoke hood, a clamping jaw is arranged on the outer side of the middle smoke hood, a lifting arm is arranged on one side of the clamping jaw, and an inflatable sealing ring is arranged between the middle smoke hood and the upper smoke hood.
As a further description of the novel airtight protection cover device, the inflatable sealing ring is a hollow silicon rubber inflatable sealing ring, an inflatable cavity is arranged inside the inflatable sealing ring, and an air inlet nozzle is arranged on one side of the surface of the inflatable sealing ring.
As the further description of novel airtight protection cover device, it fixes on electroslag furnace equipment main part to go up the installation of petticoat pipe upper end, it is provided with dust removal tobacco pipe to go up the petticoat pipe outside, lower petticoat pipe lower extreme is provided with the crystallizer, go up the petticoat pipe with be provided with the sealing member between the electroslag furnace equipment main part, it is petticoat pipe on the cylinder stainless steel to go up the petticoat pipe.
As a further description of the novel airtight protection cover device, a planar sealing ring is arranged between the lower smoke hood and the crystallizer, and a planar sealing ring is arranged between the middle smoke hood and the lower smoke hood.
As a further description of the novel airtight protection cover device, the middle smoke hood is a cylindrical stainless steel middle smoke hood, the outer side of the middle smoke hood is provided with a protection gas inlet, and the lower smoke hood is a cylindrical stainless steel lower smoke hood.
As a further description of the novel airtight protection cover device, one end of the lifting arm is connected with a lifting track, the lifting track is far away from the lifting arm and is provided with a supporting vertical beam at one side, the lifting track is fixedly connected with the supporting vertical beam, and the lifting arm is controlled by a PLC program.
The novel airtight protection cover device has the beneficial effects that 1, the novel airtight protection cover device adopts a combined mode structure of the upper smoke cover, the middle smoke cover and the lower smoke cover, each section of smoke cover is a circular integral stainless steel welding piece, the strength is high, the manufacturing is easy, the number of installed sealing pieces is small, and the novel airtight protection cover device has excellent sealing property.
2. The novel airtight protection cover device is arranged on the electroslag furnace, so that the external air can be effectively prevented from entering, and the oxygen content in the smelting space can be well controlled to be reduced to the minimum when the protection gas (argon) is filled, so that the quality and the yield of the smelting steel ingot are improved.
3. According to the novel airtight protection cover device, the inflatable sealing ring is arranged between the upper smoke hood and the middle smoke hood, the planar sealing ring is arranged between the lower smoke hood and the middle smoke hood, and the planar sealing ring is arranged between the lower smoke hood and the crystallizer, so that the device is ensured to have good air tightness, the usage amount of protection gas (argon) required to be filled in is greatly reduced in the smelting process, and the production cost and the safety risk are effectively reduced.
Drawings
FIG. 1 is a schematic side view of the present invention;
FIG. 2 is a schematic view of the overall structure of the present invention;
FIG. 3 is a cross-sectional view of the inflatable gasket of the present invention;
in the figure, 1, a smoke cover is arranged; 2. a middle smoke hood; 3. a lower smoke hood; 4. clamping jaws; 5. a lifting arm; 6. a planar seal ring; 7. a lifting rail; 8. supporting the vertical beam; 9. a shielding gas inlet; 10. a dust removal smoke tube; 11. an inflatable seal ring; 12. a crystallizer; 13. an inflatable cavity; 14. an air inlet nozzle.
Detailed Description
Firstly, the design initiatives of the invention are explained, the electroslag furnace is indispensable production equipment of special steel mills, at present, the coaxial electroslag furnace at home and abroad is not provided with a protective cover device, some equipment is provided with a protective cover device, most of the protective cover devices are two-door or four-door protective cover devices, the integral air tightness effect is not good, so that the quality of the smelted steel ingot is not good, and meanwhile, the yield is greatly reduced.
The invention is described in detail with reference to the accompanying drawings, as shown in fig. 1-3, a novel airtight protective cover device for an electroslag furnace comprises an upper smoke cover 1, a middle smoke cover 2 and a lower smoke cover 3, the protective cover device is used in cooperation with the electroslag furnace, wherein the upper end of the upper smoke cover 1 is fixedly arranged on an electroslag furnace equipment main body, and the lower end of the lower smoke cover 3 is provided with a crystallizer 12.
Economical and practical nature is considered in the preparation of airtight safety cover, consequently go up the petticoat pipe 1 well petticoat pipe 2 lower petticoat pipe 3 all adopts stainless steel material to make, and its material has intensity height, simple manufacture, advantage that the cost is lower, in addition, uses the airtight safety cover device of stainless steel material preparation, has prolonged the life of airtight safety cover device.
In order to ensure the leakproofness of novel airtight protection cover device junction, well petticoat pipe 2 with be provided with plane sealing washer 6 down between the petticoat pipe 3, down petticoat pipe 3 with be provided with plane sealing washer 6 between the crystallizer 12, through plane sealing washer 6 can ensure the sealed effect of junction.
Well petticoat pipe 2 with go up and be provided with inflatable seal 11 between the petticoat pipe 1, this inflatable seal 11 is cavity silicon rubber seal, inflatable seal 11's inside is provided with inflatable cavity 13, just inflatable seal 11 is provided with suction nozzle 14 on the surface, is convenient for carry out gaseous filling and discharge to inflatable cavity 13.
In order to ensure the automatic operation of the whole device, the whole device is controlled by a PLC program, a clamping jaw 4 is arranged on the outer side of the middle smoke hood 2, a lifting arm 5 is connected to one side of the clamping jaw 4, the lifting arm 5 is installed on a lifting track 7, the lifting track 7 is installed on an external supporting vertical beam 8, and the middle smoke hood 2 is clamped by the clamping jaw 4 on the lifting arm 5 and moves up and down along the lifting track 7 under the driving of an external power source.
In the smelting process, a large amount of smoke dust is generated, in order to discharge the generated smoke dust, a dust removal smoke pipe 10 is arranged on the outer side of an upper smoke hood 1, the smoke dust can be effectively discharged in the smelting process, protective gas needs to be filled in the process, and a protective gas inlet 9 is arranged on the outer side of a middle smoke hood 2.
When the middle smoke hood 2 rises to contact with the bottom of the upper smoke hood 1, at the moment, the inflation cavity 13 of the inflation sealing ring 11 is inflated with gas, so that the inflation sealing ring 11 seals the gap between the upper smoke hood 1 and the middle smoke hood 2 after expanding.
The above detailed description explains the specific structure of the present invention, and the following description explains the working principle: before smelting, a worker assembles the lower smoke hood 3 on a crystallizer 12 for smelting and placing steel ingots and then integrally places the lower smoke hood on a smelting station, and a fixed plane sealing ring 6 is arranged at the flange connection plane of the lower smoke hood 3 and the crystallizer 12; the main body of the rotating equipment drives the upper smoke hood 1, the inflatable seal ring 11, the middle smoke hood 2 and the lifting arm 5 to move together to the position above a smelting station, then the lifting arm 5 is operated, the middle smoke hood 2 and the inflatable seal ring 11 are driven to descend, the lower end flange face of the middle smoke hood 2 is descended to the position after contacting with the upper end flange face of the lower smoke hood 3 (the two flange contact planes are provided with the fixed plane seal ring 6), at the moment, the inflatable seal ring 11 on the upper part of the middle smoke hood 2 can be automatically filled with connected gas to expand the connected gas, the gas is tightly pressed on the outer ring of the upper smoke hood 1 in the radial direction to be sealed, at the moment, the airtightness of the three smoke hoods of the upper smoke hood 1, the middle smoke hood 2 and the lower smoke hood 3 is established, and a worker can operate the equipment to fill protective gas into the airtight space through the protective gas inlet 9.
When smelting is finished, when the airtight protection cover needs to be moved away, gas in the inflatable cavity of the inflatable sealing ring 11 is discharged, so that the inflatable sealing ring 11 is contracted into a natural state, namely the inflatable sealing ring 11 is not in a sealing and pressing state, at the moment, the lifting arm 5 drives the middle smoke hood 2 and the inflatable sealing ring 11 to vertically lift to a safe distance, the tightness of three smoke hoods of the upper smoke hood 1, the middle smoke hood 2 and the lower smoke hood 3 is relieved, and workers can perform other preparation work.
The technical solutions described above only represent the preferred technical solutions of the present invention, and some possible modifications to some parts of the technical solutions by those skilled in the art all represent the principles of the present invention, and fall within the protection scope of the present invention.
Claims (1)
1. The novel airtight protection cover device for the electroslag furnace comprises an upper smoke cover (1) and is characterized in that the lower end of the upper smoke cover (1) is sequentially provided with a middle smoke cover (2) and a lower smoke cover (3), a clamping jaw (4) is arranged on the outer side of the middle smoke cover (2), a lifting arm (5) is arranged on one side of the clamping jaw (4), and an inflatable sealing ring (11) is arranged between the middle smoke cover (2) and the upper smoke cover (1);
the inflatable sealing ring (11) is a hollow silicon rubber inflatable sealing ring (11), an inflatable cavity (13) is arranged in the inflatable sealing ring (11), and an air inlet nozzle (14) is arranged on one side of the surface of the inflatable sealing ring (11);
the upper end of the upper smoke hood (1) is fixedly arranged on an electroslag furnace equipment main body, a dust removal smoke pipe (10) is arranged on the outer side of the upper smoke hood (1), a crystallizer (12) is arranged at the lower end of the lower smoke hood (3), a sealing element is arranged between the upper smoke hood (1) and the electroslag furnace equipment main body, and the upper smoke hood (1) is a cylindrical stainless steel upper smoke hood (1);
a plane sealing ring (6) is arranged between the lower smoke hood (3) and the crystallizer (12), and a plane sealing ring (6) is arranged between the middle smoke hood (2) and the lower smoke hood (3);
the middle smoke hood (2) is a cylindrical stainless steel middle smoke hood (2), a protective gas inlet (9) is arranged on the outer side of the middle smoke hood (2), and the lower smoke hood (3) is a cylindrical stainless steel lower smoke hood (3);
lifting arm (5) one end is connected with lift track (7), lift track (7) are kept away from lifting arm (5) one side and are provided with and support upright roof beam (8), lift track (7) with support upright roof beam (8) fixed connection, lifting arm (5) go up and down and adopt PLC program control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010664432.8A CN111690817B (en) | 2020-07-10 | 2020-07-10 | Novel airtight protective cover device of electroslag furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010664432.8A CN111690817B (en) | 2020-07-10 | 2020-07-10 | Novel airtight protective cover device of electroslag furnace |
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| Publication Number | Publication Date |
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| CN111690817A CN111690817A (en) | 2020-09-22 |
| CN111690817B true CN111690817B (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010664432.8A Active CN111690817B (en) | 2020-07-10 | 2020-07-10 | Novel airtight protective cover device of electroslag furnace |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112342401A (en) * | 2020-10-19 | 2021-02-09 | 东北大学 | Sealed petticoat pipe suitable for rotating electrode vacuum electroslag remelting technology |
| CN114410977B (en) * | 2021-12-27 | 2023-07-25 | 河钢股份有限公司 | Preparation method of large-size high-strength invar forging |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4132545A (en) * | 1975-12-08 | 1979-01-02 | Rabinovich Volf I | Method of electroslag remelting processes using a preheated electrode shield |
| CN110373553A (en) * | 2019-08-26 | 2019-10-25 | 东北大学 | A kind of electroslag furnace consutrode oxidation and method |
| CN213203157U (en) * | 2020-07-10 | 2021-05-14 | 苏州振湖电炉有限公司 | Novel airtight protective cover device of electroslag furnace |
-
2020
- 2020-07-10 CN CN202010664432.8A patent/CN111690817B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4132545A (en) * | 1975-12-08 | 1979-01-02 | Rabinovich Volf I | Method of electroslag remelting processes using a preheated electrode shield |
| CN110373553A (en) * | 2019-08-26 | 2019-10-25 | 东北大学 | A kind of electroslag furnace consutrode oxidation and method |
| CN213203157U (en) * | 2020-07-10 | 2021-05-14 | 苏州振湖电炉有限公司 | Novel airtight protective cover device of electroslag furnace |
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| CN111690817A (en) | 2020-09-22 |
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