Gapless baking device for submersed nozzle of tundish

Abstract

A tundish submersed nozzle gapless baking device aims at achieving gapless baking of a submersed nozzle after fire of a baking device is turned off and before casting is started, the baking temperature is guaranteed, the casting success rate is increased, and the designed structure of the tundish submersed nozzle gapless baking device integrates the functions of free positioning, front-back movement, ignition, gas flow adjustment and the like. The device comprises a gas distributor, a connecting metal hose, a gas burner, a telescopic centering device, a lead screw, a supporting bearing and the like.

Description

Technical Field

[0001] The invention relates to the technical field of baking the tundish submerged nozzle, in particular to a gapless baking device for the tundish submerged nozzle. Background Art

[0002] In the production process of casting machine, the baking of the tundish immersion nozzle is a crucial link. It must reach a red state before pouring, and the temperature must reach above 800℃. Its baking effect directly affects the pouring operation and has a decisive influence on the success rate of pouring.

[0003] Generally, the baking of integral submerged nozzles is completed by a downward suction device, which draws down the heat in the middle package through compressed air in order to bake the submerged nozzle, or a fan is connected to the lower part of the package, and the suction force of the fan is used to draw down the heat in the middle package to bake the nozzle; the baking of split nozzles is generally completed by an offline baking oven, which bakes the split nozzle by burning gas to make it quickly reach a red state, meeting the needs of replacing the nozzle.

[0004] In the production process, after the tundish is baked, the baker will be closed to stop baking, and then the tundish will be quickly opened from the baking position to the casting position. After the nozzle is centered, the sliding nozzle of the large ladle will be opened to start casting. After the molten steel capacity in the tundish reaches the target capacity, the immersion nozzle will be opened for pouring. This process usually takes 5-8 minutes. During this process, the baked immersion nozzle is in a cooling process because of the movement of the tundish car, the closing of the baker, the nozzle centering operation, and the control of the molten steel capacity in the tundish. The temperature of the originally baked immersion nozzle will drop from 800℃ to below 500℃, or even lower. Summary of the invention

[0005] In view of the defects or shortcomings in the prior art, the present invention provides a gapless baking device for an immersion nozzle of a tundish, so as to achieve gapless baking of the immersion nozzle after the baking device is turned off and before pouring, thereby ensuring the baking temperature and improving the success rate of pouring.

[0006] The technical solution of the present invention is as follows:

[0007] A tundish submerged nozzle gapless baking device, characterized in that it comprises a first telescopic centering device and a second telescopic centering device arranged in parallel, the bottoms of the two telescopic centering devices are fixed to the tundish bottom beam through their respective lower square tubes, the top of the first telescopic centering device is respectively connected to the first gas burner, the second gas burner and the third gas burner through the upper square tube, the top of the second telescopic centering device is respectively connected to the fourth gas burner, the fifth gas burner and the sixth gas burner through the upper square tube, each gas burner is provided with an ignition device, the air inlet of the first gas burner is connected to the compressed air distributor through the first metal hose, the air inlet of the second gas burner is connected to the compressed air distributor through the second metal hose, and the air inlet of the third gas burner is connected to the compressed air distributor through the third metal hose. The pipe is connected to the compressed air distributor, the air inlet of the fourth gas burner is connected to the compressed air distributor through the fourth metal hose, the air inlet of the fifth gas burner is connected to the compressed air distributor through the fifth metal hose, the air inlet of the sixth gas burner is connected to the compressed air distributor through the sixth metal hose, the gas inlet of the first gas burner is connected to the gas distributor through the seventh metal hose, the gas inlet of the second gas burner is connected to the gas distributor through the eighth metal hose, the gas inlet of the third gas burner is connected to the gas distributor through the ninth metal hose, the gas inlet of the fourth gas burner is connected to the gas distributor through the tenth metal hose, the gas inlet of the fifth gas burner is connected to the gas distributor through the eleventh metal hose, and the gas inlet of the sixth gas burner is connected to the gas distributor through the twelfth metal hose.

[0008] The telescopic centering device is fixedly supported by a support bearing, and a lead screw is installed above the bearing. The lead screw has a manual adjustment wheel, and the lead screw can be extended and retracted forward and backward through the adjustment wheel, thereby realizing the centering of the burner.

[0009] The telescopic centering device surrounds the submerged water nozzle by adjusting the gas burner to the outer arc side of the submerged water nozzle.

[0010] The technical effects of the present invention are as follows: the present invention provides a gapless baking device for an immersion nozzle of a tundish, which realizes the full-process baking of the immersion nozzle from the time when the tundish baker bakes the tundish to the time when the tundish starts pouring, which can ensure that the temperature does not lose and improve the success rate of pouring.

[0011] The present invention has the following characteristics:

[0012] 1. The burner is centered and wrapped around the submerged nozzle through the telescopic centering device;

[0013] 2. The gas distribution and proportioning of gas to each flow burner are realized through the gas distributor;

[0014] 3. The compressed air distributor realizes the air delivery and proportioning of each flow burner;

[0015] 4. Automatic ignition of gas is achieved through electronic ignition, preventing gas from escaping without burning;

[0016] 5. This device realizes the whole process baking of the submerged nozzle from the time when the tundish baker bakes the tundish to the time when the tundish starts pouring, which can ensure that the temperature does not lose and improve the success rate of pouring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic structural diagram of a tundish submerged nozzle gapless baking device.

[0018] Figure 2 yes Figure 1 Schematic diagram of the telescopic centering device structure.

[0019] The reference numerals are as follows: 1-first gas burner; 2-second gas burner; 3-third gas burner; 4-fourth gas burner; 5-fifth gas burner; 6-sixth gas burner; 7-ignition device; 8-first metal hose; 9-second metal hose; 10-third metal hose; 11-fourth metal hose; 12-fifth metal hose; 13-sixth metal hose; 14-seventh metal hose; 15-eighth metal hose; 16-ninth metal hose; 17-tenth metal hose; 18-eleventh metal hose; 19-twelfth metal hose; 20-compressed air distributor; 21-gas distributor; 22-middle ladle bottom beam; 23-lower square tube; 24-second telescopic centering device; 25-upper square tube; 26-support bearing; 27-screw; 28-middle ladle; 29-crystallizer; 30-gas burner; 31-quick-cut mechanism; 32-first telescopic centering device. DETAILED DESCRIPTION

[0020] Below is the attached figure ( Figure 1-Figure 2 ) and Examples illustrate the present invention.

[0021] Figure 1 The present invention is a schematic structural diagram of a tundish submerged nozzle gapless baking device. Figure 2 yes Figure 1 Schematic diagram of the telescopic centering device structure. Figure 1 to Figure 2As shown, a tundish submerged nozzle gapless baking device comprises a first telescopic centering device 32 and a second telescopic centering device 24 arranged in parallel, the bottoms of the two telescopic centering devices are fixed on the tundish bottom beam 22 through their respective lower square tubes 23, the top of the first telescopic centering device 32 is respectively connected to the first gas burner 1, the second gas burner 2 and the third gas burner 3 through the upper square tube, the top of the second telescopic centering device 24 is respectively connected to the fourth gas burner 4, the fifth gas burner 5 and the sixth gas burner 6 through the upper square tube 25, each gas burner is provided with an ignition device 7, the air inlet of the first gas burner 1 is connected to the compressed air distributor 20 through the first metal hose 8, the air inlet of the second gas burner 2 is connected to the compressed air distributor 20 through the second metal hose 9, and the air inlet of the third gas burner 3 is connected to the compressed air distributor 20 through the third metal hose 10. The air inlet of the fourth gas burner 4 is connected to the compressed air distributor 20 through the fourth metal hose 11, the air inlet of the fifth gas burner 5 is connected to the compressed air distributor 20 through the fifth metal hose 12, the air inlet of the sixth gas burner 6 is connected to the compressed air distributor 20 through the sixth metal hose 13, the gas inlet of the first gas burner 1 is connected to the gas distributor 21 through the seventh metal hose 14, the gas inlet of the second gas burner 2 is connected to the gas distributor 21 through the eighth metal hose 15, the gas inlet of the third gas burner 3 is connected to the gas distributor 21 through the ninth metal hose 16, the gas inlet of the fourth gas burner 4 is connected to the gas distributor 21 through the tenth metal hose 17, the gas inlet of the fifth gas burner 5 is connected to the gas distributor 21 through the eleventh metal hose 18, and the gas inlet of the sixth gas burner 6 is connected to the gas distributor 21 through the twelfth metal hose 19.

[0022] The telescopic centering device (the first telescopic centering device 32 and the second telescopic centering device 24) is fixedly supported by the support bearing 26. A lead screw 27 is installed above the bearing. The lead screw 27 has a manual adjustment wheel. The lead screw 27 is extended and retracted forward and backward by the adjustment wheel, thereby realizing the centering of the burner. The telescopic centering device surrounds the submerged water nozzle by adjusting the gas burner 30 to the outer arc side of the submerged water nozzle. One side of the gas burner 30 is adjacent to the crystallizer 29, and the other side is adjacent to the tundish 28. A quick-cut mechanism is provided between the crystallizer 29 and the tundish 28.

[0023] The present invention adds a gapless baking device after the tundish leaves the baking position, so as to realize the gapless baking of the immersion nozzle of the tundish.

[0024] The present invention can ensure that the temperature of the baked immersion nozzle does not drop any more, thereby ensuring stability before pouring.

[0025] The present invention discloses a gapless baking device for an immersion nozzle of a tundish. The design structure of the device integrates functions such as free positioning, forward and backward movement, automatic ignition, and gas volume regulation to achieve gapless baking of the immersion nozzle after the baking device is turned off and before pouring, thereby ensuring the baking temperature and improving the success rate of pouring.

[0026] The device includes a gas distributor, a connecting metal hose, a gas burner, a telescopic centering device, a lead screw, a supporting bearing, a gas valve, etc.

[0027] 1. First, establish a telescopic centering device, which can adjust the gas burner to the outer arc side of the immersed water nozzle, and then the burner surrounds the immersed water nozzle.

[0028] 2. The telescopic centering device is fixedly supported by a support bearing; a lead screw is installed above the bearing, and the lead screw has a manual adjustment wheel. The lead screw can be extended and retracted forward and backward through the adjustment wheel, thereby realizing the centering of the burner.

[0029] 3. Except for the supporting bearings and screw rods at the telescopic centering device, the rest of the burner is fixed with square tubes to ensure strength without deformation and achieve stable operation during the centering process.

[0030] 4. Two sets of telescopic centering devices are installed on one ladle car, and one set can adjust the centering of the water inlet and burner of three streams at the same time.

[0031] 5. The gas used by the burner is transported from the gas main.

[0032] 6. The gas is transported from the main pipe to the gas distributor on the medium-duty truck through a regulating valve to control the flow and switch. The gas distributor connects the required gas to the gas inlet of the burner through a metal hose to achieve the final distribution of the gas.

[0033] 7. The air source used for gas combustion comes from compressed air. The compressed air main pipe controls the flow and switch through a regulating valve and transports it to the compressed air distributor on the medium-duty truck. The compressed air distributor connects the required gas to the air inlet of the burner through a metal hose to achieve distribution.

[0034] 8. The gas burner is divided into a gas inlet and an air inlet. The whole is round and can wrap the immersion water outlet.

[0035] 9. The interior of the gas burner is composed of neatly arranged small holes to achieve uniform distribution after ignition.

[0036] 10. A gas distributor is arranged on a medium-sized truck, connected to six metal hoses, each of which is connected to a burner, and a gas switch and flow rate that can adjust six flows at the same time.

[0037] 11. A compressed air distributor is arranged on a medium-sized truck, connected to six metal hoses, each metal hose is connected to a burner, and an air switch and flow rate that can adjust six flows at the same time.

[0038] How this device works:

[0039] After the baking of the middle ladle is completed, the baking device is closed and lifted to a high position, and the middle ladle car is lifted to a certain height to meet the walking conditions of the middle ladle car. At this time, the burner involved in the present invention is manually adjusted to the surroundings of the nozzle through the telescopic centering device, and then ignited, and the immersed nozzle is continued to be baked by the external flame of gas combustion. Then, according to the pouring process, the middle ladle car can be driven to the casting position to perform the nozzle centering operation. After the centering is completed, the large ladle is poured. After the capacity of the middle ladle reaches the target requirement, the immersion nozzle is organized for pouring.

[0040] The device realizes the whole process baking of the submerged nozzle from the time when the tundish baker bakes the tundish until the tundish starts pouring, which can ensure that the temperature does not lose and improve the success rate of pouring.

[0041] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in this field. It is pointed out here that the above description helps those skilled in the art to understand the invention, but does not limit the protection scope of the invention. Any equivalent replacement, modification and / or simplification of the above description without departing from the essence of the invention falls within the protection scope of the invention.

Claims

1. A tundish immersion nozzle gapless baking device, characterized in that: The invention comprises a first telescopic centering device and a second telescopic centering device which are arranged in parallel, the bottoms of the two telescopic centering devices are fixed on the bottom beam of the tundish through their respective lower square tubes, the top of the first telescopic centering device is respectively connected to the first gas burner, the second gas burner and the third gas burner through the upper square tube, the top of the second telescopic centering device is respectively connected to the fourth gas burner, the fifth gas burner and the sixth gas burner through the upper square tube, each gas burner is provided with an ignition device, the air inlet of the first gas burner is connected to the compressed air distributor through the first metal hose, the air inlet of the second gas burner is connected to the compressed air distributor through the second metal hose, the air inlet of the third gas burner is connected to the compressed air distributor through the third metal hose, and the air inlet of the first gas burner is connected to the compressed air distributor through the second metal hose. The air inlet of the fourth gas burner is connected to the compressed air distributor through the fourth metal hose, the air inlet of the fifth gas burner is connected to the compressed air distributor through the fifth metal hose, the air inlet of the sixth gas burner is connected to the compressed air distributor through the sixth metal hose, the gas inlet of the first gas burner is connected to the gas distributor through the seventh metal hose, the gas inlet of the second gas burner is connected to the gas distributor through the eighth metal hose, the gas inlet of the third gas burner is connected to the gas distributor through the ninth metal hose, the gas inlet of the fourth gas burner is connected to the gas distributor through the tenth metal hose, the gas inlet of the fifth gas burner is connected to the gas distributor through the eleventh metal hose, and the gas inlet of the sixth gas burner is connected to the gas distributor through the twelfth metal hose.

2. The tundish submerged nozzle gapless baking device according to claim 1 is characterized in that: The telescopic centering device is fixedly supported by a support bearing, and a lead screw is installed above the bearing. The lead screw has a manual adjustment wheel, and the lead screw can be extended and retracted forward and backward through the adjustment wheel, thereby realizing the centering of the burner.

3. The tundish submerged nozzle gapless baking device according to claim 1, characterized in that: The telescopic centering device surrounds the submerged water nozzle by adjusting the gas burner to the outer arc side of the submerged water nozzle.

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