Baking device for tundish

Abstract

The invention provides a baking device for a tundish, and relates to the technical field of ferrous metallurgy continuous casting. The baking device for the tundish comprises a base, a first driving mechanism, a second driving mechanism, a connecting piece and a first pipe fitting, the first driving mechanism is arranged on the base, the connecting piece is connected between the first driving mechanism and the first pipe fitting, and the first driving mechanism is used for driving the first pipe fitting to move towards or away from an intrusive water gap of the tundish; the first pipe fitting is rotationally connected with the connecting piece, the second driving mechanism is arranged on the connecting piece, and the second driving mechanism is connected with the first pipe fitting so as to drive the first pipe fitting to rotate; the nozzles are arranged at the top end of the first pipe fitting, the multiple nozzles are evenly arranged on the first pipe fitting in the length direction of the first pipe fitting at intervals, the multiple nozzles are used for spraying flames, the baking time of the baking device for the tundish is short, and the whole water gap can be evenly heated.

Description

Technical Field

[0001] The present application relates to the technical field of continuous casting in iron and steel metallurgy, and in particular to a baking device for a tundish. Background Art

[0002] In the metallurgical continuous casting production process, molten steel needs to be passed from the continuous casting tundish into the crystallizer. In order to avoid the exposure of molten steel, an invasive nozzle (a casing made of refractory material) is set on the tundish to protect the casting and prevent the molten steel from being secondary oxidized. Among them, the invasive nozzle of the tundish needs to be fully preheated before use. If it is not preheated or preheated insufficiently, the invasive nozzle is prone to cracks or even fractures, which affects the quality of the ingot.

[0003] As the requirements for the quality of ingots become higher and higher, the integral nozzle is generally used for the invasive nozzle. Among them, the straight hole integral nozzle is mostly used in small-section crystallizers. For the baking of the straight hole integral nozzle, there are currently two methods: exhaust baking and gas baking. The exhaust baking is to use the induced draft device at the lower end of the integral nozzle to lead the flame in the tundish to the nozzle for heating and baking. However, the baking time of this baking method is long, and the baking effect of the lower part of the nozzle is poor, and the on-site exhaust noise is also large; while the gas baking is to bake directly at the nozzle by the gas device below the nozzle, but due to the small diameter of the nozzle, the gas flame cannot reach the depth of the nozzle, resulting in uneven heating of the nozzle as a whole. Summary of the invention

[0004] The purpose of the present application includes, for example, providing a baking device for a tundish, which has a short baking time and can make the entire nozzle heated evenly.

[0005] The embodiments of the present application can be implemented as follows:

[0006] An embodiment of the present application provides a baking device for a tundish, which includes a base, a first driving mechanism, a second driving mechanism, a connecting piece and a first pipe fitting, wherein the first driving mechanism is arranged on the base, the connecting piece is connected between the first driving mechanism and the first pipe fitting, the first driving mechanism is used to drive the first pipe fitting to move toward or away from the invasive water inlet of the tundish; the first pipe fitting is rotatably connected to the connecting piece, the second driving mechanism is arranged on the connecting piece, and the second driving mechanism is connected to the first pipe fitting to drive the first pipe fitting to rotate; a nozzle is arranged at the top end of the first pipe fitting, and a plurality of nozzles are evenly spaced along the length direction of the first pipe fitting, and the plurality of nozzles are all used to spray flames.

[0007] Optionally, the first driving mechanism includes a first driving motor, a first gear and a rack, the first driving motor is fixedly disposed on the base, the first driving motor is coaxially connected to the first gear, the rack is slidably connected to the base, and the rack is transmission-matched with the first gear, and the connecting member is connected between the rack and the first pipe.

[0008] Optionally, the rack extends vertically, and a first limiter and a second limiter are sequentially arranged on the base from low to high along the extending direction of the rack;

[0009] The tundish baking device further includes a controller, and the controller is electrically connected to the first drive motor, the second drive mechanism, the first limiter, and the second limiter at the same time.

[0010] Optionally, a third limiter is also provided on the base, and along the extension direction of the rack, the third limiter is located between the first limiter and the second limiter, the distance between the second limiter and the third limiter is greater than the length of the rack, and the controller is electrically connected to the third limiter.

[0011] Optionally, a thermometer is provided at the top end of the rack, and the thermometer can always measure the temperature toward the invasive water inlet.

[0012] Optionally, the second driving mechanism includes a second driving motor, a second gear and a rotating joint, the second driving motor is arranged on the connecting member, the second driving motor is coaxially connected to the second gear, the rotating joint is connected to the first pipe fitting, an outer gear ring is arranged on the rotating joint, and the second gear cooperates with the outer gear ring in transmission.

[0013] Optionally, the tundish baking device further comprises a second pipe fitting for introducing coal gas, the second pipe fitting is rotatably connected to the rotary joint, and a solenoid valve is provided on the second pipe fitting.

[0014] Optionally, the first pipe fitting is a high alloy steel pipe, and the second pipe fitting is a metal hose.

[0015] Optionally, along the length direction of the first pipe, the distance between two adjacent nozzles is 8-12 cm.

[0016] Optionally, the base includes a bottom plate, a tripod and a mounting plate, the tripod is connected between the bottom plate and the mounting plate, and the first driving mechanism is arranged on the mounting plate.

[0017] The beneficial effects of the tundish baking device provided in the embodiments of the present application include, for example: the tundish baking device includes a base, a first driving mechanism, a second driving mechanism, a connecting piece and a first pipe fitting, the first driving mechanism is arranged on the base, the connecting piece is connected between the first driving mechanism and the first pipe fitting, the first driving mechanism is used to drive the first pipe fitting to move toward or away from the invasive water inlet of the tundish; the first pipe fitting is rotatably connected to the connecting piece, the second driving mechanism is arranged on the connecting piece, and the second driving mechanism is connected to the first pipe fitting to drive the first pipe fitting to rotate; a nozzle is arranged at the top end of the first pipe fitting, and the first pipe fitting is evenly spaced along its length direction. A plurality of nozzles are arranged, and the plurality of nozzles are all used to spray flames.

[0018] When the invasive nozzle of the tundish needs to be baked, the first driving mechanism is started, and the first driving mechanism drives the first pipe to move toward the invasive nozzle of the tundish through the connecting piece until the first pipe is inserted into the invasive nozzle. At this time, the first driving mechanism is used to drive the first pipe to reciprocate up and down in the invasive nozzle, and the second driving mechanism is started at the same time, and the second driving mechanism drives the first pipe to rotate. When multiple nozzles spray flames at the same time, the first pipe rotates in the invasive nozzle and reciprocates up and down, so that the invasive nozzle is evenly heated, and the baking time is shorter than that of the exhaust baking. After the baking is completed, the first driving mechanism is used to drive the first pipe to exit the invasive nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram for showing the positional relationship between the tundish baking device and the tundish in the embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of a baking device for a tundish according to an embodiment of the present application.

[0022] Icons: 1-base; 11-bottom plate; 12-tripod; 13-mounting plate; 131-first limiter; 132-second limiter; 133-third limiter; 2-first driving mechanism; 21-first driving motor; 22-first gear; 23-rack; 231-thermometer; 3-connecting part; 4-first pipe fitting; 41-nozzle; 5-swivel joint; 6-second pipe fitting; 61-solenoid valve; 7-middle bag; 71-intrusive water outlet. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0025] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0026] In the description of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0028] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.

[0029] As disclosed in the background technology section, there are currently two methods for baking the straight hole integral nozzle: exhaust baking and gas baking. Exhaust baking is to use an air induction device at the lower end of the integral nozzle to lead the flame in the tundish to the nozzle for heating and baking, but the baking time of this baking method is long, and the baking effect of the lower part of the nozzle is poor, and the on-site exhaust noise is also large; while gas baking is to bake by directly aiming the nozzle at the nozzle with a gas device below the nozzle, but due to the small aperture of the nozzle, the gas flame cannot reach the depth of the nozzle in the nozzle, resulting in uneven heating of the nozzle as a whole. The embodiment of the present application provides a baking device for a tundish, which is at least used to solve the above-mentioned technical problems.

[0030] Please refer to Figure 1 , Figure 2The baking device for the tundish provided in the embodiment of the present application includes a base 1, a first driving mechanism 2, a second driving mechanism, a connecting member 3 and a first pipe fitting 4, the first driving mechanism 2 is arranged on the base 1, the connecting member 3 is connected between the first driving mechanism 2 and the first pipe fitting 4, the first driving mechanism 2 is used to drive the first pipe fitting 4 to move toward or away from the intrusive water inlet 71 of the tundish 7; the first pipe fitting 4 is rotatably connected to the connecting member 3, the second driving mechanism is arranged on the connecting member 3, and the second driving mechanism is connected to the first pipe fitting 4 to drive the first pipe fitting 4 to rotate; a nozzle 41 is arranged at the top end of the first pipe fitting 4, and a plurality of nozzles 41 are evenly spaced along the length direction of the first pipe fitting 4, and the plurality of nozzles 41 are all used to spray flames.

[0031] The base 1 includes a bottom plate 11 , a tripod 12 and a mounting plate 13 . The tripod 12 is connected between the bottom plate 11 and the mounting plate 13 , and the first driving mechanism 2 is disposed on the mounting plate 13 .

[0032] The bottom plate 11 and the mounting plate 13 are both steel plates. The length, width and thickness of the bottom plate 11 are 25 cm, 25 cm and 2 cm respectively, and the length, width and thickness of the mounting plate 13 are 60 cm, 15 cm and 1 cm respectively. The bottom plate 11 is arranged parallel to the horizontal ground, and the length direction of the mounting plate 13 is perpendicular to the horizontal ground. The three legs of the tripod 12 are welded to the bottom plate 11, and the top end of the tripod 12 is welded to the bottom end of the mounting plate 13.

[0033] The first driving mechanism 2 is arranged on the mounting plate 13, and the second driving mechanism is used to drive the first pipe 4 to rotate around its own axis. The length direction of the first pipe 4 is consistent with the length direction of the mounting plate 13. The first pipe 4 is used to pass gas to spray flames at the nozzle 41.

[0034] When it is necessary to bake the invasive nozzle 71 of the tundish 7, the first driving mechanism 2 is started, and the first driving mechanism 2 drives the first pipe 4 to move toward the invasive nozzle 71 of the tundish 7 through the connecting piece 3 until the first pipe 4 extends into the invasive nozzle 71. At this time, the first driving mechanism 2 is used to drive the first pipe 4 to reciprocate up and down in the invasive nozzle 71, and the second driving mechanism is started at the same time. The second driving mechanism drives the first pipe 4 to rotate around its own axis. When multiple nozzles 41 spray flames at the same time, the first pipe 4 rotates in the invasive nozzle 71 and reciprocates up and down, so that the invasive nozzle 71 is evenly heated, and the baking time is shorter than that of the exhaust baking. After the baking is completed, the first driving mechanism 2 is used to drive the first pipe 4 to withdraw from the invasive nozzle 71.

[0035] In this embodiment, along the length direction of the first pipe 4, the distance between two adjacent nozzles 41 is 8-12 cm.

[0036] It should be noted that, since a plurality of nozzles 41 are evenly spaced along the length direction of the first pipe 4, the distance between any two adjacent nozzles 41 is 8-12 cm, and optionally, the distance between any two adjacent nozzles 41 is 8 cm, 10 cm or 12 cm. It is understandable that the distance between any two adjacent nozzles 41 can be determined according to actual working conditions.

[0037] In this embodiment, the first driving mechanism 2 includes a first driving motor 21, a first gear 22 and a rack 23. The first driving motor 21 is fixedly arranged on the base 1. The first driving motor 21 is coaxially connected with the first gear 22. The rack 23 is slidably connected with the base 1, and the rack 23 is transmission-matched with the first gear 22. The connecting member 3 is connected between the rack 23 and the first pipe 4.

[0038] The first drive motor 21 is fixedly arranged on the mounting plate 13, and the rack 23 is slidably connected to the mounting plate 13, wherein the rack 23 and the mounting plate 13 can be slidably connected by the cooperation of the slider and the slide groove, and the extension direction of the slide groove and the extension direction of the rack 23 are consistent with the length direction of the mounting plate 13.

[0039] When the first drive motor 21 is started, the first drive motor 21 drives the first gear 22 to rotate, the first gear 22 drives the rack 23 to move, and the rack 23 drives the first pipe fitting 4 to move toward the invasive water inlet 71 of the tundish 7 through the connecting member 3 until the first pipe fitting 4 extends into the invasive water inlet 71. At this time, the first drive motor 21 is used to drive the first pipe fitting 4 to reciprocate up and down in the invasive water inlet 71.

[0040] In this embodiment, the rack 23 extends vertically, and the first limiter 131 and the second limiter 132 are sequentially arranged on the base 1 from low to high along the extension direction of the rack 23; the baking device for the intermediate bag also includes a controller, which is electrically connected to the first drive motor 21, the second drive mechanism, the first limiter 131 and the second limiter 132 at the same time.

[0041] The first stopper 131 and the second stopper 132 are respectively arranged at the bottom and the top of the mounting plate 13. The controller can control the operation of the first drive motor 21 and the second drive mechanism. When the controller controls the operation of the first drive motor 21, the rack 23 drives the first pipe 4 to extend into the inlet 71 through the connecting member 3, and the rack 23 touches the second stopper 132. At this time, the controller controls the first drive motor 21 to stop running, and the rack 23 does not continue to rise. After baking is completed, the controller controls the first drive motor 21 to run until the rack 23 touches the first stopper 131, and then the controller controls the first drive motor 21 to stop running.

[0042] In this embodiment, a third limiter 133 is also provided on the base 1. Along the extension direction of the rack 23, the third limiter 133 is located between the first limiter 131 and the second limiter 132. The distance between the second limiter 132 and the third limiter 133 is greater than the length of the rack 23, and the controller is electrically connected to the third limiter 133.

[0043] The third limiter 133 is arranged in the middle of the mounting plate 13, and the third limiter 133 can be optionally located at a distance from the first limiter 131. When the rack 23 touches the second limiter 132 and the first pipe fitting 4 extends into the intrusive water inlet 71, the controller controls the first drive motor 21 to operate, and the rack 23 moves downward until the rack 23 touches the third limiter 133. At this time, the controller controls the first drive motor 21 to reverse, and the rack 23 moves upward again. The first pipe fitting 4 is repeatedly moved up and down to heat the intrusive water inlet 71 evenly.

[0044] In this embodiment, a temperature measuring instrument 231 is disposed at the top end of the rack 23 , and the temperature measuring instrument 231 can always measure the temperature toward the invasive water inlet 71 .

[0045] When the thermometer 231 moves with the rack 23, the temperature measuring end of the thermometer 231 is always facing the outer wall of the invasive water nozzle 71, so that the thermometer 231 can measure the temperature more accurately during the entire baking process. The thermometer 231 is electrically connected to the controller to monitor the temperature of the invasive water nozzle 71 in real time to prevent the temperature of the invasive water nozzle 71 from being too high or too low, affecting the pouring and the quality of the casting, and reducing energy waste to a certain extent.

[0046] When the temperature of the intrusive water inlet 71 fails to reach the temperature matching the fire, the controller controls the solenoid valve 61 to adjust the gas flow rate by increasing the opening by 5% every 5 minutes to enhance the baking of the intrusive water inlet 71 until the intrusive water inlet 71 reaches the preset temperature.

[0047] In this embodiment, the second driving mechanism includes a second driving motor, a second gear and a rotating joint 5. The second driving motor is arranged on the connecting member 3, the second driving motor is coaxially connected to the second gear, the rotating joint 5 is connected to the first pipe 4, an outer gear ring is arranged on the rotating joint 5, and the second gear cooperates with the outer gear ring in transmission.

[0048] The connecting member 3 can be optionally a connecting plate or a connecting tube, the second drive motor is fixed on the connecting member 3, the rotating joint 5 is fixedly connected to the first pipe member 4, and the rotating joint 5 is communicated with the first pipe member 4; an outer gear ring is fixedly arranged on the rotating joint 5, the second gear is matched with the outer gear ring for transmission, and the controller is electrically connected to the second drive motor.

[0049] When the first pipe 4 extends into the intrusion water inlet 71 , the controller controls the second drive motor to operate, the second drive motor drives the second gear to rotate, and the second gear drives the rotary joint 5 to rotate synchronously with the first pipe 4 , so that the intrusion water inlet 71 is evenly heated.

[0050] In this embodiment, the tundish baking device further comprises a second pipe 6 for introducing coal gas. The second pipe 6 is rotatably connected to the rotary joint 5 , and a solenoid valve 61 is provided on the second pipe 6 .

[0051] The second pipe 6 is connected to the external gas pipeline, and the controller is electrically connected to the solenoid valve 61. The controller controls the opening of the solenoid valve 61 to adjust the gas flow rate and thus the size of the flame. For example, when the opening of the solenoid valve 61 gradually increases, the flame also gradually increases.

[0052] The controller can adjust the opening of the solenoid valve 61 every 10 minutes according to the set gas flow rate to keep the invasive water inlet 71 at an optimal baking temperature; the controller controls the rotation speed of the second drive motor, and then adjusts the rotation speed of the rotary joint 5 to match the rotation speed of the rotary joint 5 with the size of the flame. For example, the larger the flame, the faster the rotation speed of the rotary joint 5; or, the larger the flame, the slower the rotation speed of the rotary joint 5, depending on the actual working conditions.

[0053] In this embodiment, the first pipe 4 is a high alloy steel pipe, and the second pipe 6 is a metal hose. The outer diameter of the high alloy steel pipe can be selected to be 20 cm. It can be understood that in other embodiments, the first pipe 4 and the second pipe 6 can also be made of other materials as long as a gas passage can be formed between the first pipe 4 and the second pipe 6.

[0054] The working principle of the baking device for the tundish provided in the embodiment of the present application is as follows: before baking, the tundish 7 vehicle carries the tundish 7 to the baking position for baking, and the tundish 7 is baked first. After the baking effect of the tundish 7 reaches the target temperature for pouring, the gas ignition nozzle 41 is turned on half an hour before pouring, and the controller controls the first drive motor 21 to operate, the first drive motor 21 drives the first gear 22 to rotate, the first gear 22 drives the rack 23 to move, and the rack 23 drives the first pipe fitting 4 to move toward the invasive water inlet 71 of the tundish 7 through the connecting member 3 until the first pipe fitting 4 extends into the invasive water inlet 71, at this time, the first drive motor 21 is used to drive the first pipe fitting 4 to reciprocate up and down in the invasive water inlet 71; at the same time, the controller controls the second drive motor to operate, the second drive motor drives the second gear to rotate, and the second gear drives the rotary joint 5 to rotate synchronously with the first pipe fitting 4, so that the invasive water inlet 71 is evenly heated. After baking, the controller controls the first drive motor 21 to drive the rack 23 and the first pipe 4 to move downward until the rack 23 touches the first limiter 131. The controller controls the first drive motor 21 and the second drive motor to turn off, and at the same time controls the solenoid valve 61 to turn off, disconnecting the gas passage.

[0055] In summary, an embodiment of the present application provides a baking device for a tundish. When multiple nozzles 41 on the first pipe 4 spray flames simultaneously, the first pipe 4 can rotate in the invasive water inlet 71 and reciprocate up and down, so that the invasive water inlet 71 is evenly heated.

[0056] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A baking device for a tundish, characterized in that: The invention comprises a base, a first driving mechanism, a second driving mechanism, a connecting piece and a first pipe fitting, wherein the first driving mechanism is arranged on the base, the connecting piece is connected between the first driving mechanism and the first pipe fitting, and the first driving mechanism is used to drive the first pipe fitting to move toward or away from the intrusive water inlet of the tundish; the first pipe fitting is rotatably connected to the connecting piece, the second driving mechanism is arranged on the connecting piece, and the second driving mechanism is connected to the first pipe fitting to drive the first pipe fitting to rotate; a nozzle is arranged at the top end of the first pipe fitting, and a plurality of nozzles are evenly spaced along the length direction of the first pipe fitting, and the plurality of nozzles are all used to spray flames.

2. The tundish baking device according to claim 1, characterized in that: The first driving mechanism includes a first driving motor, a first gear and a rack. The first driving motor is fixedly arranged on the base. The first driving motor is coaxially connected to the first gear. The rack is slidably connected to the base, and the rack is in transmission cooperation with the first gear. The connecting member is connected between the rack and the first pipe.

3. The tundish baking device according to claim 2, characterized in that: The rack extends vertically, and a first limiter and a second limiter are sequentially arranged on the base from low to high along the extending direction of the rack; The tundish baking device further includes a controller, and the controller is electrically connected to the first drive motor, the second drive mechanism, the first limiter, and the second limiter at the same time.

4. The tundish baking device according to claim 3, characterized in that: A third limiter is also provided on the base. Along the extension direction of the rack, the third limiter is located between the first limiter and the second limiter. The distance between the second limiter and the third limiter is greater than the length of the rack. The controller is electrically connected to the third limiter.

5. The tundish baking device according to claim 2, characterized in that: A temperature measuring instrument is arranged at the top end of the rack, and the temperature measuring instrument can always measure the temperature toward the invasive water inlet.

6. The tundish baking device according to claim 1, characterized in that: The second driving mechanism includes a second driving motor, a second gear and a rotating joint. The second driving motor is arranged on the connecting member. The second driving motor is coaxially connected to the second gear. The rotating joint is connected to the first pipe. An outer gear ring is arranged on the rotating joint. The second gear cooperates with the outer gear ring in transmission.

7. The tundish baking device according to claim 6, characterized in that: The tundish baking device further comprises a second pipe for introducing coal gas, the second pipe is rotatably connected to the rotary joint, and a solenoid valve is arranged on the second pipe.

8. The tundish baking device according to claim 7, characterized in that: The first pipe fitting is a high alloy steel pipe, and the second pipe fitting is a metal hose.

9. The tundish baking device according to claim 1, characterized in that: Along the length direction of the first pipe, the distance between two adjacent nozzles is 8-12 cm.

10. The tundish baking device according to claim 1, characterized in that: The base comprises a bottom plate, a tripod and a mounting plate, the tripod is connected between the bottom plate and the mounting plate, and the first driving mechanism is arranged on the mounting plate.

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