CN211471520U

CN211471520U - Atmosphere protection device for electroslag remelting

Info

Publication number: CN211471520U
Application number: CN202020088490.6U
Authority: CN
Inventors: 吴轲源; 吴高路; 王亮; 江裕恒; 徐良清; 刘清华; 斯庭智; 徐良乐
Original assignee: Maanshan Xuyang Machinery Co ltd
Current assignee: Maanshan Xuyang Machinery Co ltd
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2020-09-11
Anticipated expiration: 2030-01-14

Abstract

The utility model discloses an atmosphere protection device for electroslag remelting, which belongs to the technical field of ferrous metallurgy. The crystallizer comprises a crystallizer, a protective cover plate and an opening and closing cover plate, wherein the shapes of the protective cover plate and the opening and closing cover plate are matched with the shape of a furnace mouth of the crystallizer; the protective cover plate is movably arranged above a furnace mouth of the crystallizer; the opening and closing cover plate is fixedly arranged on the protective cover plate and can be opened or closed. The utility model discloses can block the contact of air and steel ingot from the source, the contact of steel ingot and air that has significantly reduced improves the cleanliness factor of product, does not receive the influence of other factors in the external world moreover, and sealed effect is better relatively.

Description

Atmosphere protection device for electroslag remelting

Technical Field

The utility model belongs to the technical field of ferrous metallurgy, more specifically say, relate to an atmosphere protection device for electroslag is remelted.

Background

Electroslag remelting is a method of melting metal by joule heat generated by electric current, and then cooling and solidifying the metal into an ingot, and the principle is similar to resistance welding. The electroslag remelting technology has simple process and equipment, strong applicability, purer produced metal, less inclusions, fine inclusion particles and compact structure, and becomes an important means for producing high-quality steel ingots.

However, in the smelting process, because a sealing device is not protected, electroslag can be in large-area contact with air, so that the content of oxygen and nitrogen in steel can be increased, and a large number of air holes in a steel ingot can be finally scrapped if the electroslag is serious.

To the above-mentioned because do not have sealing device, in the smelting process, electroslag can lead to oxygen, nitrogen content in the steel to increase with the air large tracts of land contact, leads to the condemned problem of steel ingot when serious, and this problem has been considered in some prior art, for example, chinese patent application, the application number is: CN201520844557.3, published date: the utility model discloses a 2016 3 month 16 days's utility model patent, discloses an argon protection device for electroslag remelting furnace argon protection is sealed. The utility model discloses a ring pipe, the ring pipe sets up the one deck at least, and the equipartition has the venthole on the ring pipe inner wall horizontal direction, is equipped with an air inlet branch road on the ring pipe at least, and air inlet branch road is connected with the air inlet pipeline. The disadvantages of this solution are: according to the scheme, the furnace mouth is separated from the external air by adopting an argon blowing method for atmosphere protection, and because the contact between the steel ingot and the air is not isolated from the source, the argon is required to be blown all the time in the electroslag remelting process, and the sealing method is greatly influenced by external environmental factors and has relatively poor sealing effect.

Disclosure of Invention

1. Problems to be solved

The sealing method to current adoption argon gas blowing receives external environment factor to influence great, the relatively poor problem of sealed effect, the utility model provides an atmosphere protection device for electroslag is remelted. The utility model discloses an atmosphere protection device can block the contact of air and steel ingot from the source, and the contact of steel ingot with the air that has significantly reduced improves the cleanliness factor of product, and this device does not receive the influence of other factors in the external world moreover, and sealed effect is better relatively.

2. Technical scheme

In order to solve the above problems, the utility model adopts the following technical proposal.

An atmosphere protection device for electroslag remelting comprises a crystallizer, a protection cover plate and an opening and closing cover plate, wherein the shapes of the protection cover plate and the opening and closing cover plate are matched with the shape of a furnace mouth of the crystallizer; the protective cover plate is movably arranged above a furnace mouth of the crystallizer; the opening and closing cover plate is fixedly arranged on the protective cover plate and can be opened or closed.

The protection device is of a double-layer structure, the sealing performance is stronger, and the opening and closing cover plate can be opened or closed, so that the placement of the remelting electrode cannot be influenced.

Furthermore, the protective cover plate is annular, the diameter of the outer circle of the protective cover plate is 3-5 cm smaller than that of the outer circle of the furnace opening of the crystallizer, and the diameter of the inner circle of the protective cover plate is the same as that of the inner circle of the furnace opening of the crystallizer.

When the leakproofness is guaranteed, the protection cover plate is smaller than the excircle of the mouth of the crystallizer, and the mouth of the crystallizer cannot be covered, so that the position where the protection cover plate is placed can be seen more visually, and the position of the protection cover plate can be adjusted more conveniently.

Furthermore, the opening and closing cover plate is generally in a ring shape, the diameter of the inner circle of the opening and closing cover plate is the same as that of the remelting electrode, and the diameter of the outer circle of the opening and closing cover plate is 3-5 cm larger than that of the inner circle of the protection cover plate.

Sealing performance is good, and the protection apron can play a fixed stay's effect to the apron that opens and shuts moreover, prevents to open and shut the apron and uses the deformation for a long time, leads to sealing performance variation.

Furthermore, an opening and closing handle is arranged at an opening and closing position of the opening and closing cover plate, so that the opening and closing cover plate can be opened or closed more conveniently.

Furthermore, a refractory cotton layer is arranged between the protective cover plate and the crystallizer, so that the protective cover plate and the opening and closing cover plate can be prevented from deforming due to high temperature.

Furthermore, the protection cover plate is also provided with a fine adjustment mechanism, so that the position of the protection cover plate can be adjusted.

Furthermore, the number of the fine adjustment mechanisms is two, extension lines of the two fine adjustment mechanisms intersect at the circle center of the inner circle of the protection cover plate, all positions of the protection cover plate can be adjusted, and the adjustable range is large.

Furthermore, the fine adjustment mechanism comprises a fine adjustment screw rod with a fine adjustment handle, a fine adjustment nut and a fixing piece, and the fine adjustment nut is fixedly arranged on the protective cover plate; one end of the fine adjustment screw rod, which is far away from the fine adjustment handle, is in threaded connection with the fine adjustment nut, and one end of the fine adjustment screw rod, which is close to the fine adjustment handle, is fixedly connected with the fixing piece; the fixing piece is fixedly connected with the crystallizer.

An operator can move the protective cover plate by rotating the fine adjustment screw rod through the fine adjustment handle, and the adjustment mode is simpler.

3. Advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

(1) the utility model discloses an atmosphere protection device is remelted to electroslag is provided with the apron above crystallizer fire door, blocks the contact of air and steel ingot, establishes protection device as the protection apron in addition and the apron that opens and shuts is two-layer, and sealing performance improves relatively, can not receive external environment factor's interference.

(2) The utility model discloses an electroslag atmosphere protection device, through the handle that opens and shuts that sets up on the apron that opens and shuts, can be very easy will open and shut the apron and open or close to the switch of the apron that opens and shuts also can reduce the hindrance of atmosphere protection device to crystallizer and remelting electrode centering process, can also improve the convenient degree that the deoxidier added in addition, improves work efficiency.

(3) The utility model discloses an atmosphere protection device is remelted to electroslag because the crystallizer is remelted to be higher at the temperature of during operation fire door, sets up protection device into bilayer structure to be provided with the refractory wool between crystallizer fire door and protection cover plate, the refractory wool can prevent with the protection cover plate that opens and shuts that the apron receives thermal deformation, increase of service life.

(4) The utility model discloses an electroslag atmosphere protection device is provided with a pair of fine-tuning, can pass through manual operation fine-tuning, because the extension line of two fine setting screw rods intersects in the interior circle centre of a circle of protective cover board, can adjust atmosphere protection device's position all around through manual operation, makes the interior circle of the apron of opening and shutting more laminating remelting electrode, reduces the entering of air.

Drawings

FIG. 1 is a top view of the atmosphere protecting device of the present invention;

FIG. 2 is a cross-sectional view of the atmosphere protecting device of the present invention;

in the figure:

1. a protective cover plate;

2. opening and closing the cover plate; 201. fixing the bolt; 202. the handle is opened and closed;

3. a fine adjustment mechanism; 301. fine adjustment of the screw rod; 302. fine adjustment of the nut; 303. a fixing member; 304. finely adjusting the handle;

4. a refractory cotton layer; 5. a crystallizer; 6. a pipeline.

Detailed Description

The invention will be further described with reference to specific embodiments and drawings.

Example 1

The embodiment provides an electroslag remelting atmosphere protection device, which is shown in fig. 1 and fig. 2 and comprises a crystallizer 5, a protective cover plate 1 and an opening and closing cover plate 2, wherein the shapes of the protective cover plate 1 and the opening and closing cover plate 2 are matched with the shape of a furnace mouth of the crystallizer 5; the protective cover plate 1 is movably arranged above a furnace mouth of the crystallizer 5; the opening and closing cover plate 2 is fixedly arranged on the protective cover plate 1, and the opening and closing cover plate 2 can be opened or closed.

The existing atmosphere protection device is generally characterized in that an annular argon blowing pipeline is arranged at a furnace mouth of a crystallizer 5, the furnace mouth is separated from the outside air by adopting an argon blowing method for atmosphere protection, and because the mode does not isolate the contact between a steel ingot and the air from the source, the argon is required to be blown all the time in the electroslag remelting process, and the sealing method is greatly influenced by the outside environment factors, so that the sealing effect is relatively poor.

To the above-mentioned defect, the applicant has improved the atmosphere protection device, cut off steel ingot and air from the source, and set up protection device as bilayer structure, including protection cover plate 1 and the apron 2 that opens and shuts, place protection cover plate 1 in the top of 5 furnace mouths of crystallizer, the apron 2 that will open and shut is fixed on protection cover plate 1 through two fixing bolt 201, the shape of the apron 2 that opens and shuts and protection cover plate 1 and the shape phase-match of 5 furnace mouths of crystallizer, the sealing performance of this design is better, and the apron 2 that opens and shuts can open or close, can not influence the placing of remelting electrode, and as long as open the apron 2 that opens and shuts, just can add the deoxidier, consequently, the convenient degree of interpolation has still been improved, and work efficiency is improved.

Meanwhile, a pipeline 6 is laid at the furnace mouth of the crystallizer 5, the pipe mouth extends downwards, inert gas such as argon is introduced into the pipeline, an inert gas protective layer can be formed near the furnace mouth, the air in the furnace is isolated from the outside air, and the outside air can be prevented from entering the crystallizer 5 through gaps.

Example 2

The embodiment provides an electroslag remelting atmosphere protection device which is further improved on the basis of embodiment 1, wherein the protection cover plate 1 is annular, the diameter of the outer circle of the protection cover plate is 3-5 cm smaller than that of the outer circle of a furnace opening of the crystallizer 5, and the diameter of the inner circle of the protection cover plate is the same as that of the inner circle of the furnace opening of the crystallizer 5.

The excircle diameter of the protective cover plate 1 is designed to be smaller than the excircle diameter of the furnace mouth of the crystallizer 5, and the protective cover plate 1 can be placed on the furnace mouth of the crystallizer 5. In this embodiment, the excircle diameter of the protection cover plate 1 is designed to be less than 5cm of the excircle diameter of the furnace mouth of the crystallizer 5, and the excircle diameter of the protection cover plate 1 is less than the excircle diameter of the furnace mouth of the crystallizer 5, so that the furnace mouth of the crystallizer 5 cannot be covered, therefore, an operator can clearly and visually see the position of the protection cover plate 1, and the position of the protection cover plate 1 can be conveniently adjusted. The diameter of the inner circle of the protective cover plate 1 is the same as that of the inner circle of the furnace mouth of the crystallizer 5, so that the protective cover plate 1 can separate air from steel ingots, and the air isolation effect is achieved.

Example 3

The embodiment provides an electroslag remelting atmosphere protection device, which is further improved on the basis of the embodiment 2, wherein the opening and closing cover plate 2 is generally in a circular ring shape, and a circular ring formed by the opening and closing cover plate 2 and the protection cover plate 1 are concentric circles. The diameter of the inner circle of the opening and closing cover plate 2 is the same as that of the remelting electrode, and the diameter of the outer circle of the opening and closing cover plate is 3-5 cm larger than that of the inner circle of the protection cover plate 1.

In this embodiment, the outer circle diameter that will open and shut apron 2 designs for being greater than the inner circle diameter 3cm of protection apron 1, and this design can fix the apron 2 that opens and shuts on protection apron 1, consequently, protection apron 1 can play the effect of a support to the apron 2 that opens and shuts, prevents that the apron 2 that opens and shuts from taking place to warp in long-time use, leads to the leakproofness variation. Meanwhile, the diameter of the inner circle of the opening and closing cover plate 2 is the same as that of the remelting electrode, so that air can be prevented from entering the crystallizer 5 along a gap between the protection cover plate 1 and the remelting electrode, and the sealing performance can be further enhanced.

In addition, the switch of the cover plate 2 can be opened and closed to reduce the obstruction of the protective device to the crystallizer 5 and the remelting electrode in the centering process, and the convenience degree of adding the deoxidizer can be improved, so that the working efficiency is improved.

Example 4

The embodiment provides an electroslag remelting atmosphere protection device, which is further improved on the basis of the embodiment 3, and an opening and closing handle 202 is installed at an opening and closing position of the opening and closing cover plate 2.

Meanwhile, because the electroslag remelting is carried out at a high temperature, a heat insulation layer is arranged on the outer layer of the opening and closing handle 202, so that an operator can hold the opening and closing handle 202 conveniently to control the opening or closing of the opening and closing cover plate 2, the hand of the operator can be prevented from being scalded, and potential safety hazards are prevented.

Example 5

The embodiment provides an electroslag remelting atmosphere protection device, which is further improved on the basis of embodiment 4, and a refractory cotton layer 4 is arranged between the protective cover plate 1 and the crystallizer 5.

Because electroslag remelting crystallizer 5 is at the during operation, the temperature of fire door is higher, and protection apron 1 is directly placed on crystallizer 5's fire door with the apron 2 that opens and shuts, and protection apron 1 is for no magnetism stainless steel with the material of the apron 2 that opens and shuts, in order to improve protection apron 1 and the life who opens and shuts apron 2, prevent that it from producing deformation because of high temperature, lead to the sealing performance variation, be provided with the annular fire-resistant cotton layer 4 of one deck between protection apron 1 and crystallizer 5's fire door, can prevent protection apron 1 and the apron 2 that opens and shuts because of the thermal deformation.

Simultaneously, the thickness of the cover plate 1 and the protective cover plate 2 that open and shut all sets up to 10mm, and the design of this thickness also can prevent to open and shut cover plate 1 and protective cover plate 2 because of being heated the deformation, and the cover plate 1 and the protective cover plate 2 that open and shut of this thickness are also not so heavy moreover, influence operating personnel and remove the protective cover plate.

Example 6

The embodiment provides an electroslag remelting atmosphere protection device, which is further improved on the basis of the embodiment 5, and as described in conjunction with fig. 2, the protective cover plate 1 is further provided with a fine adjustment mechanism 3, which can manually adjust the position of the protective cover plate 1, so that the relative position between the inner circle of the protective cover plate 1 and the remelting electrode can be adjusted.

Because the protection apron is annular shape during 1, in order to more conveniently adjust the position of protection apron 1, be provided with two with fine tuning 3 in this embodiment to two fine tuning 3's extension lines intersect in the interior circle centre of a circle of protection apron 1, both can adjust the left and right sides position of protection apron 1, can adjust the front and back position of protection apron 1 again, and is more simple and convenient.

The fine adjustment mechanism 3 comprises a fine adjustment screw 301 with a fine adjustment handle 303, a fine adjustment nut 302 and a fixing piece 303, the opening and closing cover plate 2 is fixed on the protective cover plate 1 and is not movable, the protective cover plate 1 is placed on a furnace mouth of the crystallizer 5 and can move, so that the fine adjustment nut 302 is fixedly arranged on the protective cover plate 1, and the fine adjustment nut 302 is arranged on the protective cover plate 1 at a position which is 5cm larger than the excircle of the opening and closing cover plate 2; one end of the fine adjustment screw 301, which is far away from the fine adjustment handle 303, is in threaded connection with the fine adjustment nut 302, and one end of the fine adjustment screw, which is close to the fine adjustment handle 303, is fixedly connected with the fixing piece 303; the fixing member 303 is fixedly connected to the mold 5.

Wherein, mounting 303 among fine adjustment mechanism 3 includes horizontal plate and vertical board, the one end of vertical board with be close to fine setting screw 301 fixed connection of fine setting handle 303 department, the other end and horizontal plate fixed connection, and the horizontal plate is fixed on crystallizer 5, consequently can fix fine setting screw 301 through mounting 303, prevents that it from rocking, or goes out from fine setting nut 302 and drops.

An operator can rotate the fine adjustment screw 301 by operating the fine adjustment handle 303, so that the protective cover plate 1 moves along with the movement direction of the fine adjustment screw 301, the protective cover plate 1 can be operated to move left and right, the relative position of the protective device and the remelting electrode is adjusted, the inner circle of the opening and closing cover plate 2 is ensured to be attached to the remelting electrode as much as possible, gaps are reduced, the sealing performance is enhanced, and the contact between air and steel ingots is reduced.

The examples of the utility model are only right the utility model discloses a preferred embodiment describes, and not right the utility model discloses design and scope are injectd, do not deviate from the utility model discloses under the prerequisite of design idea, the field engineering technical personnel are right the utility model discloses a various deformation and improvement that technical scheme made all should fall into the protection scope of the utility model.

Claims

1. An atmosphere protection device for electroslag remelting, comprising a crystallizer (5), characterized in that: the crystallizer is characterized by further comprising a protective cover plate (1) and an opening and closing cover plate (2), wherein the shapes of the protective cover plate (1) and the opening and closing cover plate (2) are matched with the shape of a furnace mouth of the crystallizer (5); the protective cover plate (1) is movably arranged above a furnace mouth of the crystallizer (5); the opening and closing cover plate (2) is fixedly arranged on the protective cover plate (1), and the opening and closing cover plate (2) can be opened or closed.

2. An atmosphere protecting device for electroslag remelting according to claim 1, wherein: the protective cover plate (1) is annular, the diameter of the outer circle of the protective cover plate is smaller than the diameter of the outer circle of the furnace mouth of the crystallizer (5) by 3-5 cm, and the diameter of the inner circle of the protective cover plate is the same as the diameter of the inner circle of the furnace mouth of the crystallizer (5).

3. An atmosphere protecting device for electroslag remelting according to claim 2, wherein: the opening and closing cover plate (2) is generally in a ring shape, the diameter of the inner circle of the opening and closing cover plate is the same as that of the remelting electrode, and the diameter of the outer circle of the opening and closing cover plate is 3-5 cm larger than that of the inner circle of the protection cover plate (1).

4. An atmosphere protecting device for electroslag remelting according to claim 3, wherein: an opening and closing handle (202) is arranged at the opening and closing position of the opening and closing cover plate (2).

5. An atmosphere protecting device for electroslag remelting according to any one of claims 1-4, wherein: a refractory cotton layer (4) is arranged between the protective cover plate (1) and the crystallizer (5).

6. An atmosphere protecting device for electroslag remelting according to any one of claims 1-4, wherein: the protection cover plate (1) is also provided with a fine adjustment mechanism (3).

7. An atmosphere protecting device for electroslag remelting according to claim 6, wherein: the number of the fine adjustment mechanisms (3) is two, and extension lines of the two fine adjustment mechanisms (3) are intersected at the circle center of the inner circle of the protection cover plate (1).

8. An atmosphere protecting device for electroslag remelting according to claim 7, wherein: the fine adjustment mechanism (3) comprises a fine adjustment screw (301) with a fine adjustment handle (304), a fine adjustment nut (302) and a fixing piece (303), and the fine adjustment nut (302) is fixedly arranged on the protective cover plate (1); one end of the fine adjustment screw rod (301) far away from the fine adjustment handle (304) is in threaded connection with the fine adjustment nut (302), and one end of the fine adjustment screw rod close to the fine adjustment handle (304) is fixedly connected with the fixing piece (303); the fixing piece (303) is fixedly connected with the crystallizer (5).