CN201371225Y - Device for forming hollow profile of cast iron through continuous casting limited by composite physical field - Google Patents
Device for forming hollow profile of cast iron through continuous casting limited by composite physical field Download PDFInfo
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- CN201371225Y CN201371225Y CN200920032006U CN200920032006U CN201371225Y CN 201371225 Y CN201371225 Y CN 201371225Y CN 200920032006 U CN200920032006 U CN 200920032006U CN 200920032006 U CN200920032006 U CN 200920032006U CN 201371225 Y CN201371225 Y CN 201371225Y
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- crystallizer
- hollow profile
- magnetic field
- cast iron
- continuous casting
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The utility model discloses a device for forming hollow profile of cast iron through continuous casting limited by composite physical field. The device comprises an inductive holding furnace, a seal furnace cover, a crucible arranged in the inductive holding furnace, an air inlet/outlet pipe inserted into the crucible by passing through the seal furnace cover, a thermocouple, a liquid lift tube and a pouring tube, wherein, the upper end surface of the liquid lift tube is in vertical butt joint with a crystallizer; the upper end surface of the pouring tube is in vertical butt joint with a pouring cup; and magnetic field generators are arranged around the outer periphery of the crystallizer which is made of austenite stainless steel and is processed through annealing after being welded. The device enables the molten iron in the crystallizer to crust under condensation under the composite action of temperature field, spiral magnetic field and gravity field, ensures the liquid column in the core of the cast tube not to be pulled out of solid profile due to the radiation crusting on the surface, enables the inside of the pouring cup to keep at a high temperature to prevent the molten iron from freezing, and ensures the smoothness of pulling continuous casing.
Description
Technical field
The utility model belongs to the metallurgical casting technical field, relates to a kind of device of casting the cast iron hollow profile, is specifically related to the device of a kind of compound physical field constraint shaping continuous casting cast iron hollow profile.
Background technology
Horizontal continuous-casting is produced the cast iron solid profile, because of its characteristics with energy-saving material-saving and clean environment firendly production have obtained significant progress in recent years.And for the cast iron hollow profile, adopt traditional " glass tube down-drawing ", produce, the crystallizer of equipment therefor is by inside and outside two-layer the composition in this method, and forms circumferential weld between two-layer, and molten iron injects this circumferential weld condensation and goes out pipe, mechanism pulls out from the below by drawing, obtains cast tube.But there are a lot of casting flaws in this cast tube, can not use as " section bar ", can only be used for the upper and lower conduit road.Mainly utilize centrifugal device to produce the cast iron hollow profile at present, but there is the limitation of size and homogeneity of ingredients in the cast iron hollow profile of this device casting, section bar tube wall heart portion is loose simultaneously.
Patent " the continuous casting building mortion of inductile metal hollow section bar " (application number 2007100118928.2, publication number CN101134231A, open day 2008.03.05) disclosed a kind of continuous casting building mortion, solve traditional centrifugal device well and produced the existing problem of hollow profile, but this device is in the continuous casting process, the fluid column surface of cast tube heart portion is because of the heat radiation crust, cause pulling out sometimes solid profile, molten iron in the pouring cup solidifies because of heat scatters and disappears simultaneously, and what influence cast continuously carries out smoothly.
Summary of the invention
The purpose of this utility model provides the device of a kind of compound physical field constraint shaping continuous casting cast iron hollow profile, in continuous drawing casting cast iron hollow profile process, cast tube heart portion fluid column surface can not cause pulling out solid profile because of the heat radiation crust, simultaneously, the high temperature that keeps molten iron in the pouring cup, it is not solidified, guarantee carrying out smoothly of continuous casting.
The technical scheme that the utility model adopted is, the constraint of a kind of compound physical field is shaped and casts the device of cast iron hollow profile continuously, comprise the crucible of placing in induction holding furnace, sealing bell, the induction holding furnace, comprise that also passing the sealing bell inserts crucible interior import/exhaust pipe, thermocouple, stalk and gate spool, the upper surface of stalk is vertically to being connected to crystallizer, vertically to being connected to pouring cup, the excircle of crystallizer is surrounded with magnetic field generator in the upper surface of gate spool.
Feature of the present utility model also is,
The axiality of magnetic field generator and crystallizer is less than 0.5mm.
Crystallizer adopts austenitic stainless steel to make, and carries out annealing in process after welding processing.
Distance between magnetic field generator lower surface and the crystallizer lower flange is 1/4～1/3 of a magnetic field generator total height.
Be surrounded with groove in the sidewall of pouring cup, the globar heater is installed in this groove.
The utility model device is provided with the magnetic field generator that can produce helical magnetic field in the periphery of water mold, the molten iron that enters crystallizer is rotated under the effect of helical magnetic field, guaranteed that cast tube heart portion fluid column surface is not because of the heat radiation crust, and pull out solid profile, simultaneously, the globar heater is set in the sidewall of pouring cup, can makes to keep high temperature in the pouring cup, prevent molten steel solidification, guaranteed carrying out smoothly of drawing continuous casting.
Description of drawings
Fig. 1 is the structural representation of existing drawing continuous casting cast iron hollow profile device;
Fig. 2 is the structural representation of the utility model device.
Among the figure, 1. induction holding furnace, 2. crucible, 3. gate spool, 4. sealing bell, 5. pouring cup, 6. globar heater, 7. import/exhaust pipe, 8. thermocouple, 9. carry-over pinch rolls, 10. hollow profile, 11. magnetic field generator, 12. housing screws, 13. crystallizers, 14. stalks, 15. molten iron.
The specific embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
The structure of existing drawing continuous casting cast iron hollow profile device, as shown in Figure 1.Comprise induction holding furnace 1, sealing bell 4, mechanical traction mechanism and pneumatic control system.Be placed with crucible 2 in the induction holding furnace 1, be processed with two thick two thin four holes on the sealing bell 4, insert import/exhaust pipe 7 and thermocouple 8 in this two pore respectively, elevated-temperature seal is done in the insert division; This two gross porosity has step, and vertical respectively stalk 14 and the gate spool made from metallurgical industry mouth of a river material 3 that insert, stalk 14 and gate spool 3 parallel, the ring flange on stalk 14 and gate spool 3 tops is sitting on the step of gross porosity, and with High temperature Refractory Mortar sealing, about the bottom surface 50mm of the following end distance crucible 2 of stalk 14 and gate spool 3.Vertically to being connected to crystallizer 13, and seal on the flange of stalk 14 with High temperature Refractory Mortar; Vertically to being connected to pouring cup 5, also seal on the flange face of gate spool 3 with High temperature Refractory Mortar.Crystallizer 13 and pouring cup 5 all are pressed on the sealing bell 4.Sealing bell 4 is sitting in crucible 2 upper edges, with the High temperature Refractory Mortar sealing, and is fixed on housing screw 12 on the table top of induction holding furnace 1.After molten iron 15 poured into crucible 2, confined chamber of the common formation of the liquid level of sealing bell 4, crucible 2 and molten iron 15 after compressed air enters this confined chamber, forced molten iron 15 liquid levels to descend like this, and molten iron 15 rises up into crystallizer 13 from stalk 14.
Existing apparatus is in the process of drawing continuous casting cast iron hollow profile, after molten iron 15 enters crystallizer 13, in crystallizer 13, solidify crust on the inwall of graphite cannula, form the outermost layer of cast tube, under the situation that molten iron 15 further solidifies, crusting because of heat radiation in the surface of molten iron 15 fluid columns that wrap up in the cast tube outermost layer, forms solidly, and what cause that drawing goes out is not hollow profile.Simultaneously, the high temperature liquid iron in the pouring cup 5 solidifies because of heat scatters and disappears, and influences carrying out smoothly of drawing casting.
The structure of the utility model device, as shown in Figure 2.On the architecture basics of existing drawing continuous casting cast iron hollow profile device, improve.In the sidewall of pouring cup 5, be surrounded with groove, globar heater 6 is installed in this groove.The outer periphery of crystallizer 13 is equipped with the magnetic field generator 11 of annular, and crystallizer 13 is arranged in the magnetic field generator 11, and the axiality of magnetic field generator 11 and crystallizer 13 is less than 0.5mm.Distance between magnetic field generator 11 lower surfaces and crystallizer 13 lower flanges is 1/4～1/3 of magnetic field generator 11 total heights.
Magnetic field generator 11 can produce helical magnetic field.Because crystallizer 13 is arranged in the magnetic field generator 11, in order to solve the magnetic screen problem, water collar in the crystallizer 11 and annex thereof all adopt austenitic stainless steel to make, and carry out annealing in process after welding processing, to guarantee austenitic paramagnetism feature.The shell of the temperature of condensation about 1000 ℃, its metallographic structure remains austenite structure, has paramagnetism, and water collar adopts the paramagnetism material, like this, helical magnetic field just can penetrate the water-cooled interplanting and be used for molten iron 15, makes its rotation.
Distance between the lower flange of magnetic field generator 11 lower ends and crystallizer 13 makes the bottom that enters the molten iron fluid column in crystallizer 13 graphite cannulas (account for fluid column total length 1/4 to 1/3) not affected by magnetic fields, and then causes molten iron 15 can be quickly to go out one deck shell in the inwall crystallization condensation of graphite cannula.
Only need the endoporus of graphite cannula is processed into difformity, can draw the hollow profile of uiform sections such as rectangle, polygon or ellipse.
Globar heater 6 is imbedded in pouring cup 5 annular outer walls the inside, can compensate scattering and disappearing of molten iron 15 heats, guarantees the condition of high temperature of molten iron 15 in the pouring cup 5, in case it solidifies.
The utility model device is in the process of continuous casting hollow profile 10, molten iron 15 enters crystallizer 13 from stalk 14 bottoms under the compressed air effect, enter the molten iron 15 of crystallizer 13, under the effect of the helical magnetic field that magnetic field generator 11 produces, rotate on the one hand, on the other hand condensation crust and progressive additive on the inwall of crystallizer 13 graphite cannulas.15 rotations of molten iron that helical magnetic field causes have guaranteed the crust uniformity of thickness of molten iron 15 on the graphite cannula inwall, guaranteed also can not crust because of heat radiation in cast tube heart portion fluid column surface not cause pulling out solid profile.
The utility model device constitutes the compound physical field jointly by helical magnetic field, the cooling effect of crystallizer 13 and the gravity of molten iron 15 that magnetic field generator 11 produces, and pass through this compound physical field action in molten iron 15 preparation hollow profiles 10, it is advantageous that: at first, owing to feed cooling water in the crystallizer 13, make that the cooling velocity of molten iron 15 is very fast, the liquid of fluid column heart portion can carry out in time replenishing again to the volume contraction that the condensation crust causes, so the hollow profile 10 that is drawn is extremely fine and close; Secondly, enter the molten iron 15 of crystallizer 13 from stalk 14 bottoms, do not have the scum silica frost of gas and lightweight to sweep along into, so the inside of fluid origin hollow profile 10 does not have slag inclusion, pore and defective such as loosen; The 3rd, helical magnetic field has strong refining effect to solidified structure, has further strengthened the obdurability of hollow profile 10.
The utility model device adopts the atmospheric pressure compensating method to keep the constant of crystallizer 13 interior molten iron 15 liquid levels.By the atmospheric pressure compensating in the pneumatic control system implement device.In casting process along with the consumption of molten iron 15, the liquid level of molten iron 15 will reduce in the crystallizer 13, at this moment, pneumatic control system is carried out the air inlet instruction, compressed air is fed in the crucible 2 by import/exhaust pipe 7, the liquid level of molten iron 15 descends in the compressed air compressing crucible 2, and the liquid level of keeping the molten iron 15 in the crystallizer 13 is positioned at and the equal height of crystallizer 13 upper flange plates all the time.The height of molten iron 15 liquid levels in the crystallizer 13 also is the height of molten iron 15 liquid levels in the pouring cup 5, only needs range estimation to determine.
Utilization the utility model device draws hollow profile 10, is undertaken by following step:
1, in crucible induction furnace 2, places a little pig iron in advance;
2, the mouth of crucible 2 presses sealing bell 4 along smearing one deck refractory mortar, compresses with housing screw 12.
3, smear one deck refractory mortar on the step of two stepped holes on the sealing bell 4, insert stalk 14 and gate spool 3 respectively, and be seated on the step in hole, refractory mortar is smeared in the flange upper surface of stalk 14, to package crystallizer 13 in advance and dock on it, and be pressed abd fixed on the sealing bell 4.Refractory mortar is smeared in gate spool 3 flange upper surfaces, and pouring cup 5 is docked on it, also is fixed on sealing bell 4.
4, import/exhaust pipe 7 and thermocouple 8 are inserted two pores that seal bell 4 respectively,, and be connected with temperature controller with the air pressure switch board respectively with fire-resistant tampon tightening seal.
5, start induction holding furnace 1, heat the prepositioned pig iron burner hearth is toasted, when seeing that from pouring cup 53 times half temperature of gate spool reach more than 800 ℃, stop heating, once more that housing screw 12 is once fastening, guarantee to seal bell 4 sealings.
6, haulage gear clamping dummy bar descends, 1/3 depths that crystallizer 13 is inserted in the lower end that makes dummy bar have back taper seeding head.
7, according to pull-up material size calculate the weight that pours into molten iron 15, with temperature, composition is suitable and pour in the crucible 2 from pouring cup 5 through the molten iron 15 of inoculation.The pneumatic control system air inlet when liquid level in the cup 5 to be cast rises to the position suitable with crystallizer 13 upper edges, stops the air inlet of pressurizeing.
8, by the observation groove window on the dummy bar and in conjunction with knowhow, treat that molten iron 15 has solidified the above thickness of 10mm on the back taper of dummy bar seeding head, start haulage gear and carry out drawing.Recover intake process subsequently, adjust charge flow rate, allow molten iron 15 liquid levels keep constant altitude in the pouring cup 5.Just gone out temperature color behind the crystallizer 13 according to hollow profile 10, in time adjusted drawing speed, step-length and intermittent time, treated to switch to automatic control system after stable.
9, the temperature that detects according to thermocouple is adjusted induction heating power, makes in the induction holding furnace 1 temperature of molten iron 15 remain on eutectic freezing and puts above about 50 ℃.
10, according to pull-up material weight, size of burner hearth with pour into iron water amount measuring and calculating, when treating that molten iron 15 liquid levels are near stalk 14 lower ends in the burner hearth, in pouring cup 5, pour into the second iron clad water 15, stop air inlet simultaneously, start the electric Proportion valve venting, the venting flow is as the criterion to guarantee that liquid level is constant in the cup equally.
11, the power by voltage-regulation globar heater 6 makes it keep just in time that the molten iron of containing 15 is in initial temperature (testing with infrared radiation thermometer) in the pouring cup 5.
12, haulage gear is delivered to blocking/shedding mechanism of its top continuously with the hollow profile 10 that is drawn.
13, after drawing finishes, discharge crystallizer 13 and pouring cup 5, extract thermocouple 8 and import/exhaust pipe 7 tracheaes, unclamp housing pin 12, hang away sealing bell 4, topple over the residue molten iron 15 that in the crucible 2.
Claims (5)
1. a compound physical field constraint is shaped and casts the device of cast iron hollow profile continuously, comprise induction holding furnace (1), sealing bell (4), the crucible of placing in the induction holding furnace (1) (2), comprise that also passing sealing bell (4) inserts the interior import/exhaust pipe (7) of crucible (2), thermocouple (8), stalk (14) and gate spool (3), the upper surface of stalk (14) is vertically to being connected to crystallizer (13), the upper surface of gate spool (3) is vertically to being connected to pouring cup (5), it is characterized in that the excircle of described crystallizer (13) is surrounded with magnetic field generator (11).
2. the device of continuous casting cast iron hollow profile according to claim 1 is characterized in that, the axiality of described magnetic field generator (11) and crystallizer (13) is less than 0.5mm.
3. the device of continuous casting cast iron hollow profile according to claim 1 is characterized in that, described crystallizer (13) adopts austenitic stainless steel to make, and carries out annealing in process after welding processing.
4. the device of continuous casting cast iron hollow profile according to claim 1 is characterized in that, the distance between the lower surface of described magnetic field generator (11) and crystallizer (13) lower flange is 1/4～1/3 of magnetic field generator (a 11) total height.
5. according to the device of claim 1,2,3 or 4 described continuous casting cast iron hollow profiles, it is characterized in that, be surrounded with groove in the sidewall of described pouring cup (5), globar heater (6) is installed in this groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920032006U CN201371225Y (en) | 2009-02-25 | 2009-02-25 | Device for forming hollow profile of cast iron through continuous casting limited by composite physical field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920032006U CN201371225Y (en) | 2009-02-25 | 2009-02-25 | Device for forming hollow profile of cast iron through continuous casting limited by composite physical field |
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| CN201371225Y true CN201371225Y (en) | 2009-12-30 |
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| CN200920032006U Expired - Fee Related CN201371225Y (en) | 2009-02-25 | 2009-02-25 | Device for forming hollow profile of cast iron through continuous casting limited by composite physical field |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103706773A (en) * | 2013-12-18 | 2014-04-09 | 陕西同心连铸管业科技有限公司 | Hollow cast iron tubular product and vertical continuous casting method and special equipment thereof |
| CN111707387A (en) * | 2020-06-24 | 2020-09-25 | 广东韶钢松山股份有限公司 | Refining furnace temperature measuring gun lifting device and method |
-
2009
- 2009-02-25 CN CN200920032006U patent/CN201371225Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103706773A (en) * | 2013-12-18 | 2014-04-09 | 陕西同心连铸管业科技有限公司 | Hollow cast iron tubular product and vertical continuous casting method and special equipment thereof |
| CN111707387A (en) * | 2020-06-24 | 2020-09-25 | 广东韶钢松山股份有限公司 | Refining furnace temperature measuring gun lifting device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091230 Termination date: 20120225 |