Ladle refining furnace movable dust removal cover and method thereof

Abstract

The invention discloses a ladle refining furnace movable dust hood and a method thereof, and belongs to the technical field of dust hoods. The device comprises a supporting frame, a first guide rail and a second guide rail are installed on the front side and the rear side of the bottom of the supporting frame respectively, the height difference exists between the second guide rail and the first guide rail, the horizontal height of the second guide rail is lower than that of the first guide rail, and a supporting column is installed at the bottom of the first guide rail; a cover plate is welded and installed on the supporting frame, an air outlet is formed in the cover plate, and an exhaust pipe is arranged at an end opening of the air outlet. The motor is used for driving the supporting frame to slide along the first guide rail and the second guide rail, and the supporting frame moves along with the ladle refining furnace, so that the supporting frame is located above the furnace mouth all the time, the dust collection effect is ensured, and then stable dust removal is ensured; the second guide rail and the first guide rail have a height difference, through the arrangement of the high rail and the low rail, related equipment of the ladle refining furnace can be normally installed at the positions of the rails, and structural layout and use of existing equipment are not affected.

Description

Technical Field

[0001] The invention relates to the technical field of dust removal hoods, and more particularly to a mobile dust removal hood for a ladle refining furnace and a method thereof. Background Art

[0002] LF furnace, or ladle refining furnace, is an off-furnace refining technology that uses electric arc heating under vacuum conditions and is mainly used to smelt high-quality steel grades. During the molten steel refining process, a large amount of smoke and dust is generated due to the arc effect and the addition of materials and argon blowing during the smelting process. Therefore, the current ladle refining furnaces are equipped with a dust removal system, which uses a dust removal hood placed above the ladle refining furnace mouth to collect and capture dust, and then transport it out for purification before being discharged into the atmosphere.

[0003] The current ladle refining furnace dust hood is fixed, but when the ladle refining furnace is dumped, filled or transferred, the furnace is often partially or completely moved out of the existing dust hood, which results in the smoke and dust still generated cannot be stably collected and discharged, limiting the dust removal effect. Summary of the invention

[0004] 1. Technical problem to be solved by the invention

[0005] In view of the defects and shortcomings of the prior art, the present invention provides a mobile dust hood for a ladle refining furnace and a method thereof. The present invention utilizes a motor to drive a support frame to slide along guide rail one and guide rail two, and the support frame moves with the ladle refining furnace, so that it is always above the furnace mouth, thereby ensuring the dust collection effect and further ensuring the stability of dust removal; guide rail two and guide rail one have a height difference, and through the setting of the high and low rails, the relevant equipment of the ladle refining furnace can be normally installed at the track position without affecting the structural layout and use of the existing equipment.

[0006] 2. Technical solution

[0007] In order to achieve the above object, the technical solution provided by the present invention is:

[0008] A mobile dust removal cover for a ladle refining furnace of the present invention comprises a support frame, wherein a guide rail 1 and a guide rail 2 are respectively installed on the front and rear sides of the bottom of the support frame, and a bottom beam is welded and installed at the front and rear sides of the support frame, and a concave cavity is provided on the bottom surface of the bottom beam, and a guide wheel is installed in the concave cavity, and the guide wheel is respectively in contact with the top surface of the guide rail 1 and the top surface of the guide rail 2 at the corresponding position;

[0009] The bottom of the guide rail 2 is provided with a base, the side of the base is provided with uniform tooth grooves, the outer side of the tooth groove is meshed with a driving gear, and the side of the bottom beam is provided with a motor connected to the driving gear;

[0010] The guide rail 2 has a height difference with the guide rail 1, the level of the guide rail 2 is lower than that of the guide rail 1, and a support column is installed at the bottom of the guide rail 1;

[0011] A cover plate is welded and installed on the support frame, an air outlet is opened on the cover plate, and an exhaust pipe is arranged at the port of the air outlet.

[0012] Furthermore, the guide wheel is assembled with the concave cavity through a fixed shaft.

[0013] Furthermore, the guide rail 2 is fixed in the base by bolts.

[0014] Furthermore, the exhaust duct is connected to the air outlet duct through a connecting pipe, and an exhaust fan for negative pressure suction on the exhaust duct is installed in the air outlet duct.

[0015] Furthermore, the exhaust pipe and the air outlet pipe are hard pipes, and the connecting pipe is a corrugated hose.

[0016] Furthermore, the air outlet pipe is fixed by a pipe box, the connecting pipe is placed in a U-shape in the pipe box, a movable opening is reserved on the pipe box, the exhaust pipe extends into the pipe box through the movable opening and is connected to the connecting pipe.

[0017] Furthermore, the connecting pipe is provided with lifting rings at intervals, and a tension spring is welded and installed between the lifting rings and the top wall of the pipe box.

[0018] Furthermore, anti-roll plates are installed on the side surfaces of the guide wheels at both ends of the bottom beam, and the anti-roll plates abut against the side surfaces of the guide rail one or the guide rail two at the corresponding position.

[0019] Furthermore, the bottom beams are provided with two groups, and are respectively located at the front and rear sides of the support frame, and each group of bottom beams is provided with two groups of anti-roll plates, and the two groups of anti-roll plates are staggeredly arranged on both sides of the inner surface of the bottom beams.

[0020] A method for moving a dust removal hood of a ladle refining furnace. During installation, the ladle refining furnace passes under a support frame between a first guide rail and a second guide rail, and an exhaust pipe is externally connected to the top of the support frame. When the ladle refining furnace moves, a motor is controlled to work, and the meshing transmission relationship between a driving gear and a tooth groove is utilized. Relying on the support of a guide wheel on the first guide rail and the second guide rail, a bottom beam and the supporting frame are pushed to move horizontally, so as to move along with the ladle refining furnace. During the movement of the ladle refining furnace, dust collection and exhaust dust removal on the top surface can still be performed.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0023] The present invention utilizes a motor to drive the support frame to slide along the guide rail one and the guide rail two, and the support frame moves with the ladle refining furnace, so that it is always above the furnace mouth, thereby ensuring the dust collection effect and further ensuring the dust removal stability; the guide rail two and the guide rail one have a height difference, and through the setting of the high and low rails, the relevant equipment of the ladle refining furnace can be normally installed at the track position without affecting the structural layout and use of the existing equipment.

[0024] The present invention uses a connecting pipe to transfer the air outlet, and while the support frame can move along the ladle refining furnace, it can still meet the connection effect of the exhaust pipe and the outlet pipe. The connecting pipe is provided with flexible lifting support by using a lifting ring and a tension spring, which can reduce the occurrence of dislocation of the connecting pipe and ensure that the position of the exhaust pipe is limited when the connecting pipe is pulled back and forth to ensure mobility. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the overall structural diagram of the patent of this invention;

[0026] Figure 2 This is a schematic diagram of the installation of the connecting pipe in the patent of the present invention;

[0027] Figure 3 It is a bottom view of the support frame in the patent of the present invention;

[0028] Figure 4 This is a schematic diagram of the installation of the lifting ring in the patent of this invention;

[0029] Figure 5 This is a schematic diagram of the installation of the guide wheel in the patent of this invention;

[0030] Figure 6 This is a schematic diagram of the installation of the motor in the patent of this invention.

[0031] In the figure: 1. support frame; 2. cover plate; 3. air outlet; 4. exhaust duct; 5. guide rail 1; 6. guide rail 2; 7. support column; 8. bottom beam; 9. guide wheel; 10. fixed shaft; 11. anti-tilt plate; 12. concave cavity; 13. base; 14. driving gear; 15. tooth groove; 16. motor; 17. connecting pipe; 18. air outlet duct; 19. exhaust fan; 20. lifting ring; 21. tension spring; 22. pipe box; 23. movable port. DETAILED DESCRIPTION

[0032] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0033] Example 1

[0034] from Figure 1-6It can be seen that a mobile dust removal cover for a ladle refining furnace in this embodiment includes a support frame 1, and a guide rail 1 5 and a guide rail 2 6 are respectively installed on the front and rear sides of the bottom of the support frame 1, and a bottom beam 8 is welded and installed at the front and rear sides of the support frame 1. A concave cavity 12 is provided on the bottom surface of the bottom beam 8, and a guide wheel 9 is installed in the concave cavity 12. The guide wheel 9 is assembled with the concave cavity 12 through a fixed shaft 10, and the guide wheel 9 is in contact with the top surfaces of the guide rail 1 5 and the guide rail 2 6 at the corresponding positions respectively;

[0035] A base 13 is installed at the bottom of the guide rail 6, and a uniform tooth groove 15 is opened on the side of the base 13. A driving gear 14 is meshed on the outer side of the tooth groove 15, and a motor 16 connected to the driving gear 14 is installed on the side of the bottom beam 8;

[0036] There is a height difference between the guide rail 2 6 and the guide rail 1 5. The horizontal height of the guide rail 2 6 is lower than that of the guide rail 1 5. A support column 7 is installed at the bottom of the guide rail 1 5. The guide rail 2 6 is fixed to the base 13 by bolts.

[0037] A cover plate 2 is welded and installed on the support frame 1 , an air outlet 3 is opened on the cover plate 2 , and an exhaust pipe 4 is arranged at the port of the air outlet 3 .

[0038] A method for moving a dust removal hood of a ladle refining furnace. During installation, the ladle refining furnace passes under a support frame 1 between a guide rail 1 5 and a guide rail 2 6. An exhaust pipe 4 is externally connected to the top of the support frame 1. When the ladle refining furnace moves, a motor 16 is controlled to work. By utilizing the meshing transmission relationship between a driving gear 14 and a tooth groove 15 and relying on the support of a guide wheel 9 on the guide rail 1 5 and the guide rail 2 6, a bottom beam 8 and the support frame 1 supported by the ladle refining furnace are pushed to move horizontally, so as to move along with the ladle refining furnace. During the movement of the ladle refining furnace, dust collection and exhaust dust removal on the top surface can still be performed.

[0039] Example 2

[0040] from Figure 1-6 It can be seen that in the mobile dust hood of a ladle refining furnace of this embodiment, the exhaust duct 4 is connected to the air outlet duct 18 through a connecting pipe 17, and an exhaust fan 19 for negative pressure suction on the exhaust duct 4 is installed in the air outlet duct 18. The exhaust duct 4 and the air outlet duct 18 are hard pipes, and the connecting pipe 17 is a corrugated hose.

[0041] The connecting pipe 17 is a corrugated hose, so when the support frame 1 moves, the exhaust pipe 4 will pull the connecting pipe 17 to move, so as to achieve the effect of sucking air at the exhaust pipe 4 and then discharging it through the connecting pipe 17 and the air outlet pipe 18.

[0042] The air outlet pipe 18 is fixed by the pipe box 22 , and the connecting pipe 17 is placed in the pipe box 22 in a U shape. A movable opening 23 is reserved on the pipe box 22 , and the exhaust pipe 4 extends into the pipe box 22 through the movable opening 23 and is connected to the connecting pipe 17 .

[0043] The connecting pipe 17 is provided with lifting rings 20 at intervals, and a tension spring 21 is welded and installed between the lifting rings 20 and the top wall of the pipe box 22 .

[0044] The tension spring 21 and the lifting ring 20 are used to fix the position of the connecting pipe 17. The tension spring 21 has a telescopic characteristic. When the exhaust pipe 4 pulls the connecting pipe 17, the tension spring 21 can provide a continuous lifting and fixing effect for the connecting pipe 17 to avoid dislocation.

[0045] Example 3

[0046] from Figure 6 It can be seen that in the mobile dust removal hood of a ladle refining furnace of this embodiment, anti-tilt plates 11 are installed on the sides of the guide wheels 9 at both ends of the bottom beam 8, and the anti-tilt plates 11 abut against the sides of the guide rails 1 5 or 2 6 at the corresponding positions.

[0047] There are two groups of bottom beams 8, which are respectively located at the front and rear sides of the support frame 1. Two groups of anti-roll plates 11 are arranged in each group of bottom beams 8. The two groups of anti-roll plates 11 are staggered on both sides of the inner surface of the bottom beam 8.

[0048] The anti-tilt plate 11 is used to increase the supporting stability of the guide wheel 9 and the guide rail, and reduce the occurrence of the guide wheel 9 deviating and falling out of the guide rail. The two sides are staggered and just abut against the two sides of the guide rail, further improving the anti-tilt stability.

[0049] The present invention utilizes the motor 16 to drive the support frame 1 to slide along the guide rail 1 5 and the guide rail 2 6. The support frame 1 moves with the ladle refining furnace so that it is always above the furnace mouth, thereby ensuring the dust collection effect and further ensuring the dust removal stability; the guide rail 2 6 and the guide rail 1 5 have a height difference. Through the setting of the high and low rails, the relevant equipment of the ladle refining furnace can be normally installed at the track position without affecting the structural layout and use of the existing equipment.

[0050] The present invention uses the connecting pipe 17 to transfer the air outlet, while satisfying the movement of the support frame 1 along the ladle refining furnace, it can still meet the connection effect of the exhaust pipe 4 and the outlet pipe 18. The connecting pipe 17 is provided with flexible lifting support by the lifting ring 20 and the tension spring 21, which can reduce the dislocation of the connecting pipe 17 and ensure that when the exhaust pipe 4 pulls the connecting pipe 17 back and forth, its position is limited to ensure mobility.

[0051] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A mobile dust removal hood for a ladle refining furnace, comprising a support frame (1), characterized in that: The front and rear sides of the bottom of the support frame (1) are respectively installed with a guide rail 1 (5) and a guide rail 2 (6); the front and rear sides of the support frame (1) are both welded with a bottom beam (8); the bottom surface of the bottom beam (8) is provided with a concave cavity (12); a guide wheel (9) is installed in the concave cavity (12); the guide wheel (9) is respectively in contact with the top surface of the guide rail 1 (5) and the top surface of the guide rail 2 (6) at the corresponding position; A base (13) is installed at the bottom of the guide rail 2 (6), and a uniform tooth groove (15) is opened on the side of the base (13), and a driving gear (14) is meshed on the outer side of the tooth groove (15), and a motor (16) connected to the driving gear (14) is installed on the side of the bottom beam (8); The guide rail 2 (6) and the guide rail 1 (5) have a height difference, the horizontal height of the guide rail 2 (6) is lower than that of the guide rail 1 (5), and a support column (7) is installed at the bottom of the guide rail 1 (5); A cover plate (2) is welded and mounted on the support frame (1), an air outlet (3) is provided on the cover plate (2), and an exhaust pipe (4) is arranged at the end of the air outlet (3).

2. The movable dust removal hood of a ladle refining furnace according to claim 1, characterized in that: The guide wheel (9) is assembled with the concave cavity (12) via a fixed shaft (10).

3. The movable dust removal hood of a ladle refining furnace according to claim 1, characterized in that: The guide rail 2 (6) is fixed in the base (13) by bolts.

4. The movable dust removal hood of a ladle refining furnace according to claim 1, characterized in that: The exhaust pipe (4) is connected to the air outlet pipe (18) via a connecting pipe (17), and an exhaust fan (19) for negative pressure suction of the exhaust pipe (4) is installed in the air outlet pipe (18).

5. The movable dust removal hood of a ladle refining furnace according to claim 4, characterized in that: The exhaust pipe (4) and the air outlet pipe (18) are hard pipes, and the connecting pipe (17) is a corrugated hose.

6. The movable dust removal hood of a ladle refining furnace according to claim 5, characterized in that: The air outlet pipe (18) is fixed by a pipe box (22), the connecting pipe (17) is placed in a U-shape in the pipe box (22), a movable opening (23) is reserved on the pipe box (22), the exhaust pipe (4) extends into the pipe box (22) through the movable opening (23) and is connected to the connecting pipe (17).

7. The movable dust removal hood of a ladle refining furnace according to claim 6, characterized in that: The connecting pipe (17) is provided with a lifting ring (20) at intervals on its body, and a tension spring (21) is welded and installed between the lifting ring (20) and the top wall of the pipe box (22).

8. The movable dust removal hood of a ladle refining furnace according to claim 7, characterized in that: The guide wheels (9) at both ends of the bottom beam (8) are both provided with anti-tilt plates (11), and the anti-tilt plates (11) are pressed against the side of the guide rail 1 (5) or the guide rail 2 (6) at the corresponding position.

9. The movable dust removal hood of a ladle refining furnace according to claim 8, characterized in that: The bottom beams (8) are provided with two groups, and are respectively located at the front and rear sides of the support frame (1). Two groups of anti-tilt plates (11) are arranged in each group of bottom beams (8), and the two groups of anti-tilt plates (11) are staggeredly arranged on both sides of the inner surface of the bottom beam (8).

10. The method for moving the dust hood of a ladle refining furnace according to claim 9, characterized in that: During installation, the ladle refining furnace passes under the support frame (1) between the first guide rail (5) and the second guide rail (6), and the top of the support frame (1) is externally connected to an exhaust pipe (4). When the ladle refining furnace moves, the motor (16) is controlled to work, and the meshing transmission relationship between the driving gear (14) and the tooth groove (15) is utilized. Relying on the support of the guide wheel (9) on the first guide rail (5) and the second guide rail (6), the bottom beam (8) and the supporting frame (1) are pushed to move horizontally, so as to move along with the ladle refining furnace. During the movement of the ladle refining furnace, dust collection and exhaust dust removal on the top surface can still be performed.

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