CN201768908U - Submerged nozzle preheating device mounted inside tundish - Google Patents
Submerged nozzle preheating device mounted inside tundish Download PDFInfo
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- CN201768908U CN201768908U CN2010202876296U CN201020287629U CN201768908U CN 201768908 U CN201768908 U CN 201768908U CN 2010202876296 U CN2010202876296 U CN 2010202876296U CN 201020287629 U CN201020287629 U CN 201020287629U CN 201768908 U CN201768908 U CN 201768908U
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Abstract
The utility model relates to a submersed nozzle preheating device mounted inside a tundish. The submersed nozzle preheating device is characterized in that the submerged nozzle preheating device comprises a plurality of suck-back air ducts and a distributing gas bag provided with a plurality of air outlets and an air inlet; each suck-back air ducts adopt Laval nozzle type structure and comprises a contraction part and an expansion part; sleeves butted with water gaps are integrally arranged in radial direction at the junction parts of the contraction parts and the expansion parts; each suck-back air duct comprises an air inlet and an air outlet; the air inlets are connected to the air outlets of the distributing gas bag respectively through the second hoses; the air inlet of the distributing gas bag is connected with a compressed air gas source through a first hose; a main air flow control valve is arranged at the joint of the first hose and the gas source; and branch air flow control valves are arranged at all air outlets of the distributing gas bag. The submersed nozzle preheating device has the advantages of simple structure and small volume, can be removed after use, and is particularly suitable for a continuous casting platform without a preheating station; the distributing gas bag is connected with the gas source on the field, so that the operation cost is reduced; and the main air flow control valve and the branch air flow control valves are arranged in the system, so that the baking quality is improved, and production requirements are met.
Description
Technical field
The utility model relates to the middle water containing opening preheating device, relates in particular to dress submersed nozzle preheating device in the tundish.
Background technology
Tundish is a large-scale turnover part commonly used during steel-making continuous casting is produced, need before use its liner is toasted, with guarantee to water in the material feeding moisture fully, discharge completely, and guarantee that coating does not come off in the bake process, stopper does not ftracture.The normal at present compressed air exhausting suction type preheating device that adopts, this device is made of baking box, the air-introduced machine extract system that is connected with baking box, baking box is fixedlyed connected with the mouth of a river of tundish, pass through induced draft blower withdraws, the flame of baking tundish is introduced the mouth of a river, thereby reach the purpose of baking middle water containing opening.Though above-mentioned tundish preheating device is generally adopted, and has the shortcoming of several aspects:
1. complicated integral structure is bulky, and inconvenience is moved, and needs the independently pre-thermal potential of tundish on continuous casting platform, thereby the stroke of hired car increases in the middle of causing, and the continuous casting platform area increases.
2. adopt independently exhausting suction type blower fan system, need power supply separately, the job costs height.
3, air-introduced machine is introduced the mouth of a river with flame, and temperature is very high at place, the mouth of a river, and the baking box that links to each other with the mouth of a river needs to cause difficulty of construction big with the refractory material knotting, and cost of manufacture increases, and service life is lower.
4, air quantity control inconvenience, mouth of a river preheat temperature is difficult for regulating.
5, in a single day have an accident, will burn roasting plant behind the bleed-out of the mouth of a river.
Summary of the invention
The utility model provides dress submersed nozzle preheating device in a kind of simple in structure, tundish that cost is low, durable and easy to adjust for solving the technical problem that exists in the known technology.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is:
Dress submersed nozzle preheating device in a kind of tundish, it is characterized in that: comprise several suck-back air ducts and the distribution gas bag that has several gas outlets and an air inlet, described suck-back air duct adopts Laval nozzle formula structure, comprise constriction and expansion, radially be integrally formed with the sleeve that docks with the mouth of a river in described two parts junction, described suck-back air duct comprises an air inlet and a gas outlet, described air inlet is connected to each gas outlet of distributing gas bag by second flexible pipe, and described distribution gas bag air inlet is connected by first flexible pipe and compressed air gas source; Be provided with total tolerance control valve at first flexible pipe and source of the gas junction, be equipped with branch tolerance control valve in each gas outlet of distributing gas bag.
The utility model can also adopt following technical scheme:
Described suck-back air duct is welded by steel plate, and described distribution gas bag is by steel pipe manufacturing, closed at both ends, and described gas outlet is horizontally set on described distribution gas bag left side, and described air inlet is arranged on described distribution gas bag right side.
Described suck-back air duct is 6, and the gas outlet of described distribution gas bag also is 6.
Described total tolerance control valve and branch tolerance control valve all adopt manual ball valve.
Advantage and the good effect that the utlity model has are: the utility model comprises several suck-back air ducts and has the distribution gas bag of several gas outlets and an air inlet, the suck-back air duct is connected with distributing gas bag by flexible pipe, distributes gas bag to connect by flexible pipe and on-the-spot compressed air gas source.This apparatus structure is simple, the volume small volume and less weight, can remove after the use, be convenient to on-the-spot cleaning, can not damage after having an accident, be particularly useful for the little production line of continuous casting platform area, pre-thermal potential on the continuous casting platform and accident position are united two into one, this device also is applicable to the continuous casting platform that comprises pre-thermal potential, accident position and casting position; This device does not need to use independently power and control system, directly connects with on-the-spot compressed air gas source, and job costs can be ignored; This device uses steel plate and steel pipe welding, and simple in structure, firm, cost is low, long service life; Total tolerance control valve and branch tolerance control valve are set in system, can arbitrarily control the air quantity and the pre-heat effect of each stream, the mouth of a river life-span also can be satisfied production requirement when toasting for a long time.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the shaft side figure that waits of the present utility model.
Among the figure: 1-suck-back air duct; The 2-air inlet; The 3-gas outlet; The 4-sleeve; 5-second flexible pipe; 6-distributes gas bag; The 7-air inlet; The 8-gas outlet; 9-divides the tolerance control valve; 10-first flexible pipe; The total tolerance control valve of 11-; The 12-mouth of a river; The 13-tundish.
The specific embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1 and Fig. 2, dress submersed nozzle preheating device in a kind of tundish 13, comprise several suck-back air ducts 1 and the distribution gas bag 6 that has several gas outlets 8 and an air inlet 7, present embodiment is designed and developed at a machine six stream square-round billet continuous casting machines, suck-back air duct 1 is 6, be welded by steel plate, distribute gas bag 6 usefulness ￠ 200mm steel pipe manufacturings, sealed at both ends, the bracing frame that the bottom is welded with ground connection, distribute gas bag 6 left sides to be horizontally disposed with 6 gas outlets 8, distribute gas bag 6 right sides that 1 air inlet 7 is set.Above-mentioned suck-back air duct 1 adopts Laval nozzle formula mechanism, this structure comprises constriction and expansion, radially be integrally formed with the sleeve 4 that docks with the mouth of a river 12 in above-mentioned two parts junction, suck-back air duct 1 one ends are air inlet 2, the other end is gas outlet 3, the air inlet 2 of 6 suck-back air ducts 1 links to each other with six gas outlets 8 in gas bag 6 left sides by second flexible pipe 5 respectively in the present embodiment, the air inlet 7 on gas bag 6 right sides is connected by first flexible pipe 10 and compressed air gas source, be provided with total tolerance control valve 11 at first flexible pipe 10 with the source of the gas junction, be equipped with branch tolerance control valve 9 in each gas outlet 8 of distributing gas bag 6 left sides, above-mentioned tolerance control valve is preferably simple in structure, easy to operate manual ball valve.
The operation principle of the present utility model and the course of work are:
The purpose of mouth of a river baking preheating will be incorporated into high-temperature gas in the tundish even flame in the mouth of a river exactly.This is lower than the air pressure on top, the mouth of a river with regard to the air pressure that needs bottom, the mouth of a river.The utility model adopts Laval nozzle formula suck-back air duct, and its operation principle is: compressed air at first passes through the constriction of suck-back air duct, progressively shrinks, air velocity is from the subsonic speed to the velocity of sound, enter into expansion then, progressively enlarge, air velocity is from the velocity of sound to the transonic speed.High speed airflow forms negative pressure in bottom, the mouth of a river like this, just the heat on top, the mouth of a river can be brought in the mouth of a river, discharges by the gas outlet of suck-back air duct then.
Before the baking tundish, be connected dress submersed nozzle preheating device in the above-mentioned tundish 13 logical with compressed air gas source, place then under the mouth of a river 12 of tundish, slow decline tundish 13, each mouth of a river 12 that makes tundish respectively with radially vertically upward sleeve 4 centerings of each suck-back air duct 1, wrap the mouth of a river with asbestic blanket then, guarantee the sealing of the mouth of a river 12 and suck-back air duct 1.After finishing above-mentioned work, baking tundish 13.Tundish 13 when baking according to the requirement of baking curve, by regulating the cured effect that the tolerance control valve guarantees the mouth of a river, by regulating the total tolerance control valve 11 of gas, control enters total tolerance of distributing gas bag 6, divide tolerance control valve 9 by regulating, the air demand of each shunting of control.The tolerance control valve open degree at general distribution 8 two ends, gas bag 6 gas outlets is larger than the open degree of intervening vaive, and specifically the gas output with place, suck-back air duct gas outlet is as the criterion.
The tundish baking will be through too small fire, moderate heat to the big fire three phases.When little fire toasted, the air quantity that enters in the suck-back air duct was less, the open degree about 20% of this time-division tolerance control valve 9, feel that with feel having hot gas to discharge from suck-back air duct gas outlet end is advisable, continue for an hour, can see in suck-back air duct gas outlet there are flowing out, have moisture in the spout air-flow.Suitably increase air quantity then, carry out the moderate heat baking, feel that with feel place, suck-back air duct gas outlet has bigger hot gas to discharge, and increases air quantity after about 5-10 minute, the mouth of a river asbestic blanket that submersed nozzle exposes bag end root can extremely turn to be yellow in variable color, has slight " cigarette vapour " to discharge simultaneously.After about 30 minutes, mouth of a river asbestic blanket heats up gradually, and the suck-back air duct port of export is discharged tolerance and also strengthened gradually, and has water droplet to condense in steel plate place, tundish bottom.As not observing this phenomenon, must in time increase air quantity.The suck-back air duct port of export should have been observed ruddiness, but notes flare to be drawn this moment.Carry out the big fire baking, increase air quantity, make suck-back air duct exit have flare to occur, redden gradually, reach the temperature of baking curve requirement until the mouth of a river.
Claims (4)
1. adorn the submersed nozzle preheating device in a tundish, it is characterized in that: comprise several suck-back air ducts (1) and have several gas outlets (8) and the distribution gas bag (6) of an air inlet (7), described suck-back air duct (1) adopts Laval nozzle formula structure, comprise constriction and expansion, radially be integrally formed with the sleeve (4) that docks with the mouth of a river (12) in described two parts junction, described suck-back air duct (1) comprises an air inlet (2) and a gas outlet (3), described air inlet (2) is connected to each gas outlet (8) of distributing gas bag (6) by second flexible pipe (5), and described distribution gas bag air inlet (7) is connected by first flexible pipe (10) and compressed air gas source; Be provided with total tolerance control valve (11) in first flexible pipe (10) and source of the gas junction, be equipped with branch tolerance control valve (9) in each gas outlet (8) of distributing gas bag (6).
2. according to dress submersed nozzle preheating device in the described tundish of claim 1, it is characterized in that: described suck-back air duct (1) is welded by steel plate, described distribution gas bag (6) is by steel pipe manufacturing, closed at both ends, described gas outlet (8) is horizontally set on described distribution gas bag (6) left side, and described air inlet (7) is arranged on described distribution gas bag (6) right side.
3. according to dress submersed nozzle preheating device in claim 1 or the 2 described tundish, it is characterized in that: described suck-back air duct (1) is 6, and the gas outlet (8) of described distribution gas bag (6) also is 6.
4. according to dress submersed nozzle preheating device in claim 1 or the 2 described tundish, it is characterized in that: described total tolerance control valve (11) and branch tolerance control valve (9) all adopt manual ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202876296U CN201768908U (en) | 2010-08-11 | 2010-08-11 | Submerged nozzle preheating device mounted inside tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202876296U CN201768908U (en) | 2010-08-11 | 2010-08-11 | Submerged nozzle preheating device mounted inside tundish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201768908U true CN201768908U (en) | 2011-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202876296U Expired - Fee Related CN201768908U (en) | 2010-08-11 | 2010-08-11 | Submerged nozzle preheating device mounted inside tundish |
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| CN (1) | CN201768908U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106392024A (en) * | 2016-09-30 | 2017-02-15 | 马鞍山钢铁股份有限公司 | Die casting mold baking device and using method thereof |
-
2010
- 2010-08-11 CN CN2010202876296U patent/CN201768908U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106392024A (en) * | 2016-09-30 | 2017-02-15 | 马鞍山钢铁股份有限公司 | Die casting mold baking device and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20160811 |