CN211564499U

CN211564499U - Online baking device for continuous casting tundish nozzle

Info

Publication number: CN211564499U
Application number: CN201922154712.XU
Authority: CN
Inventors: 徐华瀚; 孙银钱
Original assignee: Yunnan Qu Jing Cheng Gang Iron And Steel Group Co ltd
Current assignee: Yunnan Qu Jing Cheng Gang Iron And Steel Group Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-09-25
Anticipated expiration: 2029-12-05

Abstract

The utility model discloses an online baking equipment of continuous casting tundish mouth of a river, including tundish and the mouth of a river of setting in the tundish bottom, the peripheral concentric cover in mouth of a river is equipped with the ring, the lower terminal surface processing of ring has annular boss, the below in mouth of a river is provided with hollow stoving cover, the upper end opening of stoving cover, the up end processing of stoving cover has the recess with annular boss matched with, be provided with sealed the pad between annular boss and the recess, the inside of stoving cover is provided with upper end open-ended kuppe, leave the clearance between the lateral wall of kuppe and the outer wall at the mouth of a river, the bottom of kuppe is provided with the breather pipe of bending, the department of bending of breather pipe is provided with compressed air pipe, be provided with the horizontal pole on the outer wall of stoving cover, the middle part of horizontal pole articulates there is the vaulting pole, one side. The utility model discloses safe and reliable, the temperature promotes soon, toasts effectually, has apparent economic value and social value.

Description

Online baking device for continuous casting tundish nozzle

Technical Field

The utility model relates to a steel smelting technical field, concretely relates to online baking equipment at continuous casting tundish mouth of a river.

Background

In the continuous casting process of steel smelting, a tundish is positioned below a steel ladle and above a crystallizer, and the process flow is as follows: the method comprises the steps of receiving molten steel poured from a ladle, distributing the molten steel into each crystallizer through a tundish nozzle, storing the molten steel, stabilizing steel flow, separating nonmetallic inclusions, shunting the molten steel and the like, wherein in order to reduce the oxidation, splashing and heat loss of the molten steel caused by the contact of the molten steel with air in the process of entering the crystallizer from the tundish, the tundish usually adopts an immersion nozzle, namely the tundish nozzle is immersed in the high-temperature molten steel of the crystallizer for a long time, the working environment is very harsh, in order to ensure the normal outflow of the molten steel at the nozzle, the immersion nozzle is usually baked before pouring, on one hand, the mechanical property of the nozzle is improved, on the other hand, the nozzle is preheated, and the temperature difference between the nozzle and. The baking modes of the tundish nozzle comprise non-online baking and online baking, a traditional baking oven is the non-online baking, the nozzle is placed in the baking oven during baking, the baking oven is pushed away after baking is finished, the tundish is moved to a working position, and the tundish is kept static during baking; the on-line baking device has the advantage that the water gap can be baked in the moving process of the tundish, and the baking device is arranged on the tundish frame and moves along with the tundish in a mode widely used at present.

The existing on-line baking mode is mostly a gas combustion type, a baking device is used for baking a water gap before a tundish is put into use, and the existing on-line baking mode has the following defects: firstly, in the baking process, flame is easily blown out, or coal gas cannot be sufficiently combusted, so that serious waste is caused, and meanwhile, gas poisoning accidents are easily caused for operators; secondly, the distribution of the temperature field of the water gap is not uniform during baking, the baking effect is poor, the baking requirement is difficult to achieve, and the water gap is easy to crack when the baking machine is put into production; thirdly, the baking temperature of the water gap is slowly increased, and longer baking time is needed; fourthly, the installation and removal of the toasting device is troublesome. Therefore, the development of an online baking device for the continuous casting tundish nozzle, which is safe and reliable, has fast temperature rise and good baking effect, is objectively needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a safe and reliable, the temperature promotes soon, toasts the online baking equipment at effectual continuous casting tundish mouth of a river.

The utility model aims at realizing like this, including middle package and the mouth of a river of setting in middle package bottom, the peripheral concentric cover in mouth of a river is equipped with the ring, the upper end of ring and the lower fixed surface of middle package, the lower terminal surface processing of ring has annular boss, the below in mouth of a river is provided with hollow stoving cover, the upper end opening of stoving cover, the up end processing of stoving cover has the recess with annular boss matched with, be provided with sealed the pad between annular boss and the recess, the inside of stoving cover is provided with upper end open-ended kuppe, the kuppe passes through the support bar to be fixed on the inner wall of kuppe, leave the clearance between the lateral wall of kuppe and the outer wall in mouth of a river, and the lateral wall of kuppe is identical with the outer wall profile in mouth of a river, the bottom of kuppe.

The outer wall of the baking cover is provided with a cross rod, the middle part of the cross rod is hinged with a support rod, the upper end of the support rod is rotatably connected with the lower surface of the tundish, a threaded hole is machined in one side of the cross rod opposite to the baking cover, a fastening bolt is screwed in the threaded hole, and the threaded end of the fastening bolt is screwed in the threaded hole and then abuts against the lower surface of the tundish.

Further, the section of the annular boss is in the shape of a semicircle with the middle protruding downwards.

Furthermore, the lower surface of the tundish is provided with a fixed blind plate, the lower part of the fixed blind plate is connected with a movable blind plate through a bolt, and the upper end of the stay bar is rotatably connected with the lower surface of the movable blind plate.

Further, the outer end of the cross rod is provided with a handle.

Further, the threaded end of the bolt is provided with a backing plate, and the upper surface of the backing plate is provided with a high-temperature-resistant flexible layer.

The utility model is used when the tundish is baked, the water gap is baked in the using process without adopting a gas burning mode, the condition that baking flame is extinguished does not exist, the gas resource is saved, the problem of gas poisoning is avoided, and the use is safe and reliable; secondly, in the use process, compressed air is sprayed into the vent pipe at a high speed through the compressed air pipe, the gas in the vent pipe is pushed to the front by the compressed air, then the gas on the upper part of the vent pipe and the gas in the baking cover become thin to reduce the pressure, negative pressure is generated in the baking cover, heat at the bottom of the tundish can continuously enter the baking cover from the water gap, the water gap can be preliminarily preheated in the process, then the heat is gathered in the baking cover after being guided by the guide cover to finish the all-dimensional baking of the water gap, the water gap temperature field is relatively uniformly distributed during the baking, the water gap temperature rise speed is high, the baking requirement can be quickly met, the performance of the water gap is effectively improved, the water gap is not easy to crack during the use, and the service life is prolonged; additionally, the utility model discloses the upper end that will toast the cover when using aligns with the ring, twists the bolt for the screw thread end of bolt supports the lower surface at the centre package, utilizes lever principle to make to toast cover and ring sealing connection, toasts the back that finishes, only needs to loosen the bolt, toasts the cover and moves down and break away from the mouth of a river after, rotate the horizontal pole put aside toast the cover can, easy and simple to handle. The utility model discloses safe and reliable, the temperature promotes soon, toasts effectually, has apparent economic value and social value.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural view of the stay bar 12 of the present invention;

in the figure: 1-tundish, 2-nozzle, 3-ring, 4-annular boss, 5-baking cover, 6-sealing gasket, 7-air guide sleeve, 8-supporting strip, 9-vent pipe, 10-compressed air pipe, 11-cross bar, 12-support bar, 13-fastening bolt, 14-fixed blind plate, 15-movable blind plate, 16-handle, 17-backing plate and 18-high temperature resistant flexible layer.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, but the present invention is not limited in any way, and any changes or improvements based on the present invention are all within the protection scope of the present invention.

As shown in figures 1-2, the utility model comprises a tundish 1 and a nozzle 2 arranged at the bottom of the tundish 1, a ring 3 is concentrically sleeved at the periphery of the nozzle 2, the upper end of the ring 3 is fixed with the lower surface of the tundish 1, an annular boss 4 is processed at the lower end face of the ring 3, a hollow baking cover 5 is arranged below the nozzle 2, the upper end of the baking cover 5 is open, a groove matched with the annular boss 4 is processed at the upper end face of the baking cover 5, a sealing gasket 6 is arranged between the annular boss 4 and the groove, a guiding cover 7 with an upper end open is arranged inside the baking cover 5, the guiding cover 7 is fixed on the inner wall of the baking cover 5 through a supporting bar 8, a gap is left between the side wall of the guiding cover 7 and the outer wall of the nozzle 2, the side wall of the guiding cover 7 is matched with the profile of the outer wall of the nozzle 2, a bent vent pipe 9 is arranged at the bottom of the guiding, when hot air flow at the bottom of the tundish 1 enters the baking cover 5 from the water gap 2, the hot air flow meets the blocking and flow guiding of the flow guiding cover 7 firstly, so that the hot air flow flows along the gap between the water gap 2 and the flow guiding cover 7, the hot air flow heats the outside of the water gap 2 in the flowing process, the water gap 2 is surrounded by the hot air flow, no heating blind area exists, and the baking effect is better.

The outer wall of the baking cover 5 is provided with a cross bar 11, the middle part of the cross bar 11 is hinged with a support rod 12, the upper end of the support rod 12 is rotatably connected with the lower surface of the tundish 1, a threaded hole is processed on one side of the cross bar 11 opposite to the baking cover 5, a fastening bolt 13 is screwed into the threaded hole, and the threaded end of the fastening bolt 13 passes through the threaded hole and then abuts against the lower surface of the tundish 1.

The utility model discloses an operation process does: the device is arranged at the bottom of a tundish 1, before the tundish 1 is baked, a fastening bolt 13 is loosened, the outer end of a cross rod 11 is held, a baking cover 5 is aligned to a ring 3 by using a lever principle and taking a support rod 12 as a fulcrum, the annular boss 4 is ensured to be inserted into a groove, then the fastening bolt 13 is screwed down, the threaded end of the fastening bolt 13 is tightly abutted against the lower surface of the tundish 1, the baking cover 5 and the annular boss 4 are ensured to be sealed and firm, the tundish 1 is baked after connection is finished, heat at the bottom of the tundish 1 is sucked into the baking cover 5 through a water gap 2 by using a negative pressure principle, so that the inside and the outside of the water gap 2 are baked and rapidly heated, the temperature of the baking cover is consistent with the temperature of the inside of the tundish 1, after baking is finished, the fastening bolt 13 is loosened, the outer end of the cross rod 11 is lifted, the baking cover 5 moves downwards, when the baking, the outer end of the cross rod 11 is horizontally moved, so that the baking cover 5 is moved out of the position of the water gap 2, and the baking process of the water gap 2 is completed once.

The utility model is used when the tundish 1 is baked, the water gap 2 is not baked in a gas burning mode in the using process, the condition that baking flame is extinguished does not exist, the gas poisoning problem is avoided while the gas resource is saved, and the use is safe and reliable; secondly, in the use process, the operation principle of the device is as follows: compressed air is sprayed into the vent pipe 9 at a high speed through the compressed air pipe 10, gas in the vent pipe 9 is pushed to the front by the compressed air, then the gas on the upper part of the vent pipe 9 and the gas in the baking cover 5 become thin to reduce the pressure, negative pressure is generated in the baking cover 5, heat at the bottom of the tundish 1 continuously enters the baking cover 5 from the water gap 2, the water gap 2 is preheated preliminarily in the process, then the heat is gathered in the baking cover 5 after being guided by the guide cover 7 to finish the all-dimensional baking of the water gap 2, the temperature fields of the water gap 2 are relatively uniformly distributed during baking, the heating speed of the water gap 2 is high, the baking requirement can be quickly met, the performance of the water gap is effectively improved, the water gap is not easy to crack during use, and the service life is prolonged; secondly, the utility model discloses to toast the upper end of cover 5 and align with ring 3 when using, twist fastening bolt 13 for fastening bolt 13's screw thread end supports the lower surface at middle package 1, utilizes lever principle to make to toast cover 5 and ring 3 sealing connection, toasts the back that finishes, only needs to loosen fastening bolt 13, toasts cover 5 and moves down and break away from mouth of a river 2 after, rotate horizontal pole 11 put aside toast cover 5 can, easy and simple to handle.

The section shape of the annular boss 4 is a semicircle with a downward convex middle part, and the semicircular structure with the downward convex middle part ensures that the ring 3 and the baking cover 5 have certain centering effect when being attached together, and is also beneficial to improving the sealing performance.

The lower surface of the tundish 1 is provided with a fixed blind plate 14, a movable blind plate 15 is connected below the fixed blind plate 14 through a bolt, and the upper end of the stay bar 12 is rotatably connected with the lower surface of the movable blind plate 15. The fixed blind plate 14 is fixed on the lower surface of the tundish 1, the movable blind plate 15 is connected with the fixed blind plate 14 through bolts, and when the baking device needs to be maintained or replaced, the bolts are only required to be loosened.

In order to facilitate the installation and movement of the whole baking device, the outer end of the cross bar 11 is provided with a handle 16, and when in use, a worker holds the handle 16 by hand to operate.

In order to prevent the end portions of the bolts 13 from damaging the lower surface of the tundish 1, the threaded ends of the bolts 13 are provided with backing plates 17, and the upper surfaces of the backing plates 17 are provided with high temperature resistant flexible layers 18.

Claims

1. The utility model provides an online baking equipment of continuous casting pouring basket mouth of a river, includes pouring basket (1) and sets up mouth of a river (2) in pouring basket (1) bottom, its characterized in that: the periphery of mouth of a river (2) is concentric to be equipped with ring (3), the upper end of ring (3) and the lower fixed surface of middle package (1), and the lower terminal surface processing of ring (3) has annular boss (4), the below of mouth of a river (2) is provided with hollow baking cover (5), and the upper end opening of baking cover (5), the up end processing of baking cover (5) have with annular boss (4) matched with recess, be provided with sealed pad (6) between annular boss (4) and the recess, the inside of baking cover (5) is provided with upper end open-ended kuppe (7), and kuppe (7) are fixed on the inner wall of baking cover (5) through support bar (8), leave the clearance between the lateral wall of kuppe (7) and the outer wall of mouth of a river (2), and the lateral wall of kuppe (7) and the outer wall profile of mouth of a river (2), the bottom of kuppe (7) is provided with the breather pipe (9) of bending, a compressed air pipe (10) is arranged at the bent part of the vent pipe (9);

the baking cover is characterized in that a cross rod (11) is arranged on the outer wall of the baking cover (5), a support rod (12) is hinged to the middle of the cross rod (11), the upper end of the support rod (12) is rotatably connected with the lower surface of the tundish (1), a threaded hole is machined in one side, opposite to the baking cover (5), of the cross rod (11), a fastening bolt (13) is screwed into the threaded hole, and the threaded end of the fastening bolt (13) penetrates through the threaded hole and then abuts against the lower surface of the tundish (1).

2. The on-line baking device for the continuous casting tundish nozzle according to claim 1, wherein the cross-sectional shape of the annular boss (4) is a semicircle with a downward convex middle.

3. The on-line baking device for the continuous casting tundish nozzle according to claim 1, characterized in that a fixed blind plate (14) is arranged on the lower surface of the tundish (1), a movable blind plate (15) is connected below the fixed blind plate (14) through a bolt, and the upper end of the stay bar (12) is rotatably connected with the lower surface of the movable blind plate (15).

4. The on-line baking device for the continuous casting tundish nozzle of claim 1, wherein the outer end of the cross rod (11) is provided with a handle (16).

5. The on-line baking device for the continuous casting tundish nozzle according to claim 1, characterized in that a backing plate (17) is arranged at the threaded end of the bolt (13), and a high-temperature-resistant flexible layer (18) is arranged on the upper surface of the backing plate (17).