Continuous casting machine

Abstract

The utility model relates to the technical field of continuous casting machines, in particular to a continuous casting machine which comprises a steel ladle, a tundish, a crystallizer, a supporting roller way, a secondary cooling section, a withdrawal and straightening machine, a flame cutting machine and a transmission roller set. Each section of spraying device comprises a spraying frame, an inner arc spraying pipe, an outer arc spraying pipe, a left side arc spraying pipe and a right side arc spraying pipe; the inner arc spraying pipe, the outer arc spraying pipe, the left side arc spraying pipe and the right side arc spraying pipe each comprise a water pipe, an air pipe, a plurality of spraying connecting pipes and a plurality of aerial fog nozzles, and a water collecting ring and a gas collecting ring are arranged at the tail end of each section of spraying device. The multi-section spraying device is adopted for full water cooling, cooling spraying pipes of all sections are vertically arranged to form independent faces, water collecting rings are arranged on all the sections respectively, automatic adjustment of independent loops of all the sections is achieved, it is guaranteed that water on all the faces of the square billet cross section is evenly distributed, cooling uniformity is guaranteed, and the casting blank quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to continuous casting machine technical field especially relates to a continuous casting machine. BACKGROUND

[0002] Continuous casting machine is used for casting high temperature molten steel continuously into billet with certain section shape and size specification, and the continuous casting machine comprises a ladle, a tundish, a crystallizer, a supporting roller, an integral spraying frame, a plurality of straightening machines arranged in a straightening section and a fire cutting machine, the molten steel flows from the ladle and the tundish to each flow respectively, and the molten steel forms an outer shell after being cooled and crystallized by the crystallizer of each flow once, and then is drawn out from the crystallizer, is secondarily cooled by the integral spraying frame, is straightened by the straightening machine after the secondary cooling section, and is cut by the fire cutting machine to form the billet.

[0003] However, the spraying device on the integral spraying frame is an integral structure, and a water collecting ring is used for water circulation, so that the uniformity of water distribution on each surface of the square billet section cannot be guaranteed, the liquid core cannot be completely solidified, the billet is bulged and the center is loose, and the quality of the billet is seriously affected. CONTENT OF THE UTILITY MODEL

[0004] The utility model solves the technical problem that the utility model provides a continuous casting machine to effectively solve the problem in the background art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme that a continuous casting machine comprises a ladle, a tundish, a crystallizer, a supporting roller, a secondary cooling section, a straightening machine, a fire cutting machine and a transmission roller set, and a plurality of spraying devices are arranged in the arc-shaped section of the secondary cooling section.

[0006] The spraying device of each section comprises a spraying frame, an inner arc spraying pipe, an outer arc spraying pipe, a left side arc spraying pipe and a right side arc spraying pipe arranged on the spraying frame in the circumferential direction, the inner arc spraying pipe and the outer arc spraying pipe are arranged oppositely, and the left side arc spraying pipe and the right side arc spraying pipe are arranged oppositely.

[0007] The inner arc spraying pipe, the outer arc spraying pipe, the left side arc spraying pipe and the right side arc spraying pipe each comprise a water pipe and a gas pipe arranged side by side, a plurality of spraying connecting pipes distributed along the tracks of the water pipe and the gas pipe, and a plurality of aerosol nozzles arranged correspondingly on the plurality of spraying connecting pipes.

[0008] A water collecting ring and a gas collecting ring are arranged at the end position of each spraying device.

[0009] Further, the two ends of the water pipe and the gas pipe are provided with sealing plates.

[0010] A square head pipe plug is arranged on the sealing plate below the water pipe and the gas pipe.

[0011] Further, the spray connecting pipe comprises a first connecting pipe connected to the water pipe, a second connecting pipe connected to the gas pipe, and a connecting plate arranged at the end of the first connecting pipe and the second connecting pipe;

[0012] The gas-atomizing nozzle is arranged on the connecting plate, the water pipe is communicated with the gas-atomizing nozzle through the first connecting pipe, and the gas pipe is communicated with the gas-atomizing nozzle through the second connecting pipe.

[0013] Further, the spray connecting pipe at the two ends of the inner-arc spray pipe, the outer-arc spray pipe, the left-arc spray pipe and the right-arc spray pipe is arranged obliquely towards the outside.

[0014] Further, the oblique angle of the spray connecting pipe is 10°.

[0015] Further, the spray frame is arranged at the upper part of the spray device and is fixed on the hanging beam;

[0016] The spray frame comprises a fixed frame and a connecting web plate arranged at the opposite edges of the fixed frame.

[0017] The fixed frame is hollow inside and is provided with a positioning groove for mounting the spray device on the inner side wall, and the fixed frame is provided with an adjusting hole at the connecting position of the fixed frame and the connecting web plate.

[0018] Further, the lower part of each section of the spray device is provided with a base.

[0019] The base is fixed on the support roller.

[0020] Further, the spray connecting pipe is made of stainless steel.

[0021] Further, the gas-atomizing nozzles arranged in the same section form a rectangular spray area.

[0022] Further, the support roller comprises a plurality of support roller groups arranged along the conveying track direction.

[0023] The support roller group is arranged at the end position of each section of the spray device, and the support roller group comprises a support seat, and a first support roller and a second support roller arranged on the support seat.

[0024] The first support roller is arranged at the outer-arc surface of the billet, and the second support roller is arranged at the inner-arc surface of the billet.

[0025] The utility model discloses a beneficial effect is: the utility model discloses a multistage spraying device full water cooling is adopted, and each section cooling sprinkling pipe is arranged vertically and forms each surface independent, and is separately arranged in each section water collecting ring, realizes each section independent loop automatic regulation, guarantees square billet section each surface water amount distribution is even, further guarantees the cooling uniformity, improves the casting blank quality. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, obviously, the drawing in the following description only is some embodiments in the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, can also obtain other drawings according to these drawings.

[0027] Figure 1 It is the structure schematic diagram of continuous casting machine in the embodiment of the utility model;

[0028] Figure 2 It is the structure schematic diagram of secondary cooling section in the embodiment of the utility model;

[0029] Figure 3 It is the structure schematic diagram of spraying device of first end position in the embodiment of the utility model;

[0030] Figure 4 It is Figure 3 A-A section view in the embodiment of the utility model;

[0031] Figure 5 It is the connection schematic diagram of water pipe and gas pipe and aerosol nozzle through spraying connector in the embodiment of the utility model;

[0032] Figure 6 It is the structure schematic diagram and local enlarged view of inner arc spraying pipe in the embodiment of the utility model;

[0033] Figure 7 It is the structure schematic diagram of spraying device of intermediate position in the embodiment of the utility model;

[0034] Figure 8 It is the structure schematic diagram of spraying device of terminal position in the embodiment of the utility model;

[0035] Figure 9 It is the structure schematic diagram of support roller group in the embodiment of the utility model.

[0036] Reference numerals: 1. Ladle; 2. Tundish; 3. Crystallizer; 4. Support roller conveyor; 41. Support roller assembly; 411. Support base; 412. First support roller; 413. Second support roller; 5. Secondary cooling section; 6. Straightening machine; 7. Flame cutter; 8. Drive roller assembly; 9. Suspension beam; 51. Spraying device; 511. Spraying frame; 512. Inner arc spray pipe; 513. Outer arc spray pipe; 514. Left arc spray pipe; 515. Right arc spray pipe; 516. Sealing plate; 517. Square-headed pipe plug; 518. Base; 51a. Water pipe; 51b. Air pipe; 51c. Spraying connection pipe; 51d. Aerosol nozzle; 52. Water collecting ring; 53. Air collecting ring. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0038] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0040] like Figures 1 to 9 The continuous casting machine shown includes: a ladle 1, a tundish 2, a crystallizer 3, a support roller conveyor 4, a secondary cooling section 5, a straightening machine 6, a flame cutter 7, and a drive roller group 8; characterized in that a multi-segment spraying device 51 is provided in the arc-shaped area of ​​the secondary cooling section 5; each segment of the spraying device 51 includes a spray frame 511, and an inner arc spray pipe 512, an outer arc spray pipe 513, a left arc spray pipe 514, and a right arc spray pipe 515 arranged along the circumferential direction on the spray frame 511, and the inner arc spray pipe 512 and the outer arc spray pipe 513 are arranged opposite each other, and the left arc spray pipe 514 and the right arc spray pipe 515 are arranged opposite each other;

[0041] The inner-arc spraying pipe 512, the outer-arc spraying pipe 513, the left-arc spraying pipe 514 and the right-arc spraying pipe 515 each comprise water pipes 51a and gas pipes 51b arranged side by side, a plurality of spraying connecting pipes 51c distributed along the tracks of the water pipes 51a and the gas pipes 51b, and a plurality of gas mist nozzles 51d correspondingly arranged on the plurality of spraying connecting pipes 51c.

[0042] In the utility model, the multi-section spraying device 51 is used for full water cooling, the cooling spraying pipes of each section are arranged vertically to form independent surfaces, and the water collecting rings 52 are separately arranged at each section to realize automatic adjustment of independent circuits of each section, ensure uniform distribution of water amount of each surface of the bloom section, further ensure cooling uniformity, improve the quality of the casting blank, and through the arrangement of the spraying connecting pipe 51c, the gas mist nozzle 51d can be quickly and accurately positioned and installed to ensure the centering of the gas mist nozzle 51d and realize quick connection of the gas mist nozzle 51d and the spraying pipes of each surface.

[0043] In the utility model, the both ends of the water pipes 51a and the gas pipes 51b are provided with the sealing plates 516 to form closed spaces, and the sealing plates 516 below the water pipes 51a and the gas pipes 51b are provided with square head pipe plugs 517 to facilitate cleaning of internal impurities.

[0044] In the preferred structure of the present application, the spraying connecting pipe 51c comprises a first connecting pipe connected to the water pipe 51a, a second connecting pipe connected to the gas pipe 51b and a connecting plate arranged at the end portions of the first connecting pipe and the second connecting pipe; the gas mist nozzle 51d is arranged on the connecting plate, the water pipe 51a is communicated with the gas mist nozzle 51d through the first connecting pipe, and the gas pipe 51b is communicated with the gas mist nozzle 51d through the second connecting pipe. Through the arrangement of the connecting plate, the installation efficiency of the gas mist nozzle 51d is improved.

[0045] In order to ensure uniform cooling between the adjacent two spraying devices 51, the spraying connecting pipes 51c at the two ends of the inner-arc spraying pipe 512, the outer-arc spraying pipe 513, the left-arc spraying pipe 514 and the right-arc spraying pipe 515 are inclinedly arranged towards the outside, preferably, the inclination angle of the spraying connecting pipe 51c is 10°. The uppermost and lowermost two nozzles are respectively curved upwards and downwards by 10°, the atomization cooling area is increased, the casting blank can be fully covered, and the forming quality of the casting blank is effectively ensured.

[0046] In the utility model, the spraying frame 511 is arranged at the upper portion of the spraying device 51 and is fixed on the hanging beam 9; the spraying frame 511 comprises a fixed frame and a connecting web arranged at the opposite edges of the fixed frame; the inside of the fixed frame is hollowly arranged and is provided with a positioning groove for installing the spraying device 51 on the inner side wall; the connecting position of the fixed frame and the connecting web is provided with an adjusting hole, the position of the web can be adjusted, thereby the arrangement angle of the curved section is changed, the side circumferential surface of the bloom can be uniformly cooled during bloom production, uneven cooling of the side circumferential surface is avoided, and the quality of the bloom is improved.

[0047] In the preferred scheme, in order to ensure the stability of the spraying device 51 during work, the lower portion of each spraying device 51 is provided with a base 518; the base 518 is fixed on the support roller way 4. The lower portion is fixed by using the independent base 518, the position of the single spraying device 51 is convenient to adjust, so as to avoid interference of the billets during the conveying process and effectively ensure that the overall cooling of the billets is realized by the gas mist nozzles 51d in the circumferential direction.

[0048] In the utility model, the spraying connecting pipe 51c is made of stainless steel. The stainless steel spraying pipe can withstand high temperature during continuous casting, is not easy to deform, and ensures the stability of the spraying pipe and the uniformity of the bloom cooling.

[0049] In the preferred scheme of the utility model, the gas mist nozzles 51d located in the same section form a rectangular spraying area. Compared with the traditional single water cooling nozzle, the gas mist nozzle 51d has a higher water quantity adjustment ratio, reduces the gas consumption by about 40%, thereby reducing the equipment investment and operation cost. The rectangular spraying area formed by the gas mist nozzle 51d can ensure that the surface of the bloom is uniformly cooled, reduces the temperature gradient of the surface and the inside of the bloom, thereby reducing the thermal stress caused by the temperature difference and reducing the generation of cracks.

[0050] In the preferred embodiment of the utility model, the support roller way 4 comprises a plurality of support roller groups 41 arranged along the conveying track direction; the support roller way 4 can provide more uniform support force, reduces the situation that a single point is subjected to excessive force, thereby improving the overall support stability; the support roller group 41 is arranged at the terminal position of each spraying device 51, and the support roller group 41 comprises a support seat 411 and a first support roller 412 and a second support roller 413 arranged on the support seat 411; the first support roller 412 is located at the outer side arc surface of the billet, and the second support roller 413 is located at the inner side arc surface of the billet, thereby reducing the deformation of the bloom during the conveying process and improving the quality of the bloom.

[0051] The person skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description are only for explaining the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed for protection. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A continuous caster comprising: The steel ladle (1), the tundish (2), the crystallizer (3), the support roller (4), the secondary cooling section (5), the straightening and leveling machine (6), the flame cutting machine (7) and the transmission roller group (8); characterized in that a plurality of spraying devices (51) are arranged in the arc-shaped area of the secondary cooling section (5); Each spraying device (51) comprises a spraying frame (511), and an inner arc spraying pipe (512), an outer arc spraying pipe (513), a left side arc spraying pipe (514) and a right side arc spraying pipe (515) arranged on the spraying frame (511) in the circumferential direction, and the inner arc spraying pipe (512) and the outer arc spraying pipe (513) are oppositely arranged, and the left side arc spraying pipe (514) and the right side arc spraying pipe (515) are oppositely arranged; Wherein, the inner arc spraying pipe (512), the outer arc spraying pipe (513), the left side arc spraying pipe (514) and the right side arc spraying pipe (515) all comprise water pipes (51a) and gas pipes (51b) arranged side by side, a plurality of spraying connecting pipes (51c) distributed along the tracks of the water pipes (51a) and the gas pipes (51b), and a plurality of gas mist nozzles (51d) correspondingly arranged on the plurality of spraying connecting pipes (51c); And a water collecting ring (52) and a gas collecting ring (53) are arranged at the end position of each spraying device (51).

2. The continuous caster according to claim 1, characterized in that, Both ends of the water pipes (51a) and the gas pipes (51b) are provided with sealing plates (516); And the sealing plates (516) below the water pipes (51a) and the gas pipes (51b) are provided with square head pipe plugs (517).

3. The continuous caster according to claim 1, characterized in that, The spraying connecting pipe (51c) comprises a first connecting pipe connected to the water pipe (51a), a second connecting pipe connected to the gas pipe (51b), and a connecting plate arranged at the end of the first connecting pipe and the second connecting pipe; The gas mist nozzle (51d) is arranged on the connecting plate, the water pipe (51a) is communicated with the gas mist nozzle (51d) through the first connecting pipe, and the gas pipe (51b) is communicated with the gas mist nozzle (51d) through the second connecting pipe.

4. The continuous caster as claimed in claim 1, characterized in that, The spraying connecting pipes (51c) at both ends of the inner arc spraying pipe (512), the outer arc spraying pipe (513), the left side arc spraying pipe (514) and the right side arc spraying pipe (515) are inclinedly arranged towards the outside.

5. The continuous caster defined in claim 1 wherein, The inclination angle of the spraying connecting pipe (51c) is 10°.

6. The continuous caster of claim 1, wherein, The spraying frame (511) is arranged at the upper part of the spraying device (51) and is fixed on the hanging beam (9); The spraying frame (511) comprises a fixed frame and a connecting web plate arranged at the opposite edges of the fixed frame; The inside of the fixed frame is hollow, and a positioning groove for mounting the spraying device (51) is arranged on the inner side wall, and an adjusting hole is arranged at the connecting position of the fixed frame and the connecting web plate.

7. The continuous caster defined in claim 1 wherein, A base (518) is arranged at the lower part of each spraying device (51); The base (518) is fixed on the support roller (4).

8. The continuous caster defined in claim 1 wherein, The spraying connecting pipe (51c) is made of stainless steel.

9. The continuous caster defined in claim 1 wherein, The gas-atomizing nozzles (51d) located in the same section form a rectangular spraying area.

10. The continuous caster defined in claim 1 wherein, The support roller table (4) comprises a plurality of support roller groups (41) arranged along the conveying track direction; The support roller group (41) is arranged at the end position of each section of the spraying device (51), and comprises a support seat (411), and a first support roller (412) and a second support roller (413) arranged on the support seat (411); The first support roller (412) is located at the outer arc surface of the billet, and the second support roller (413) is located at the inner arc surface of the billet.

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