Butterfly valve steel ladle bottom argon blowing refining device and using method thereof

Abstract

The invention relates to a butterfly valve steel ladle bottom argon blowing refining device and a using method thereof.The butterfly valve steel ladle bottom argon blowing refining device comprises a support and a molten steel containing component arranged on the support, and the molten steel containing component comprises a steel ladle barrel arranged on the support and a ladle wall brick arranged in the steel ladle barrel; a center air brick is embedded in the center of the ladle wall brick, a plurality of eccentric air bricks are arranged at the eccentric position of the ladle wall brick at equal intervals along the circumference, and air guide holes corresponding to the center air brick and the eccentric air bricks are formed in the bottom of the steel ladle cylinder. Finally, during working, the device integrates the eccentric argon blowing function and the central argon blowing function, the refining effect on molten steel can be effectively improved, and reliable guarantee is provided for the performance of a final butterfly valve finished product.

Description

Technical Field

[0001] The invention relates to a butterfly valve ladle bottom blowing argon refining device and a use method thereof. Background Art

[0002] The butterfly valve is a simple regulating valve with a wide range of materials to meet the use requirements under different working conditions. Since it needs to be suitable for higher pressures when working, the molten steel generally needs to be refined by argon blowing during production to improve the quality of the molten steel and thus ensure the reliability of the final butterfly valve product.

[0003] When blowing argon from the bottom of the ladle, different argon blowing positions can have different effects. Specifically, the blowing point is 1 / 2 to 2 / 3 of the radius of the ladle bottom (from the center of the ladle bottom). The rising bubble flow here will cause impact force in the horizontal direction, thereby promoting the circulation of molten steel, reducing the eddy current area, and shortening the mixing time. At the same time, this arrangement is conducive to the uniformity of molten steel composition and temperature and the removal of inclusions, so that the quality of molten steel is improved; secondly, blowing from the center of the ladle is conducive to the reaction between the ladle top slag and molten steel, and the desulfurization effect is good.

[0004] However, in the existing argon blowing refining equipment, the argon blowing position is usually fixed, that is, it is eccentric to the center of the bottom of the ladle, which makes the refining method single and the eccentric position is avoided, so that the circulation route of the molten steel is fixed, which is not conducive to the sufficient circulation of the molten steel. Therefore, the refining effect needs to be improved. Summary of the invention

[0005] The object of the present invention is to provide a butterfly valve ladle bottom blowing argon refining device and a use method thereof to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A butterfly valve ladle bottom blowing argon refining device comprises a support and a molten steel containing component arranged on the support, wherein the molten steel containing component comprises a ladle tube placed on the support and a wall brick arranged in the ladle tube;

[0008] A central air-permeable brick is embedded in the center of the wall brick, and a plurality of eccentric air-permeable bricks are arranged equidistantly along the circumference at the eccentric part, and air guide holes corresponding to the central air-permeable brick and the eccentric air-permeable brick are arranged at the bottom of the steel ladle tube;

[0009] The butterfly valve ladle bottom blowing argon refining device also includes:

[0010] A horizontal plate is arranged in the support, a mounting plate is rotatably mounted on the horizontal plate, a blowing head is movably arranged on the mounting plate through a shift mechanism, the mounting plate is connected to a rotating driving mechanism installed in the support, and the blowing head is also connected to an air inlet arranged on the outer wall of the support through a flow rate control mechanism and an air guide mechanism;

[0011] Among them, the rotary drive mechanism can drive the blowing head to rotate intermittently in the support, so that the blowing head blows argon into the molten steel through multiple eccentric air bricks in sequence. After the blowing head rotates one circle, the shifting mechanism prompts the blowing head to move along the length direction of the assembly plate so that the blowing head corresponds to the central air brick, and the flow rate control mechanism reduces the impact of argon on the molten steel.

[0012] As a further solution of the present invention: the rotary drive mechanism comprises a driven shaft rotatably mounted in the support and a transverse cylinder slidably sleeved on the driven shaft, the driven shaft is connected to the rotating shaft of the assembly plate through a bevel gear set and a transmission belt, and the transverse cylinder is connected to a threaded driving member arranged in the support;

[0013] Among them, a straight groove and multiple connected curved grooves connecting the straight groove are provided on the outer wall of the driven shaft, a ball is provided on the inner wall of the transverse cylinder, and the ball is located in the curved groove, and the curved groove includes a first groove section and a second groove section that are connected, the first groove section and the straight groove are both arranged along the axial direction of the driven shaft, and the second groove section is arranged along a spiral on the driven shaft.

[0014] As a further solution of the present invention: the flow rate control mechanism comprises a second pipe member movably arranged on the assembly plate and fixed to the air blowing head, and a first pipe member sealingly and slidingly sleeved with the second pipe member and connected to the air guide mechanism, wherein a tapered portion is formed on the first pipe member;

[0015] Among them, a driven plate is slidably provided in the first pipe fitting, and the driven plate is connected to a conical piece adapted to the conical portion. Two first inclined grooves are symmetrically provided on the driven plate, and the two first inclined grooves are respectively matched with two groups of elastic pieces provided on the first pipe fitting. The elastic pieces are triggered when the blowing head moves along the length direction of the assembly plate, and prompt the conical piece to move axially along the first pipe fitting.

[0016] As a further solution of the present invention: the elastic member comprises a telescopic column sealingly and slidably arranged on the first pipe member, the outer periphery of the telescopic column is sleeved with a first cylindrical spring, one end of the first cylindrical spring is connected to the outer wall of the first pipe member, and the other end is connected to a convex ring arranged on the telescopic column;

[0017] Among them, a triangular block is provided at one end of the telescopic column, and a driving column adapted to the first inclined groove is provided at the other end. The driving column passes through the first inclined groove and is slidably connected to the driven plate, and two protruding columns are provided on the second pipe through a connecting rod.

[0018] As a further solution of the present invention: the air guide mechanism includes an annular tube installed in the support and connected to the air inlet, and an annular member provided on the annular tube and capable of sealing and rotating relative to the annular tube, the annular member is fixed to the first pipe, and the annular tube is provided with an annular opening corresponding to the annular member.

[0019] As a further solution of the present invention: the shifting mechanism includes a sliding matching component installed on the assembly plate and connected to the second pipe, and an elastic trigger structure installed on the transverse plate, and the transverse cylinder is provided with two driving wheels that cooperate with the elastic trigger structure.

[0020] As a further solution of the present invention: the sliding fitting assembly includes a slider slidably engaged on the assembly plate, two side plates respectively arranged on both sides of the slider, a second inclined groove is provided on the side plate, a sleeve is also slidably sleeved on the rotating shaft of the assembly plate, a column adapted to the second inclined groove is fixed on the sleeve, the column passes through the second inclined groove and is slidably connected to the two side plates.

[0021] As a further solution of the present invention: the elastic trigger structure includes two upright posts arranged on the horizontal plate, a horizontal arm slidably arranged on the two upright posts and rotatably connected to the sleeve, and a trapezoidal plate cooperating with the driving wheel is respectively arranged on both sides of the horizontal arm;

[0022] Wherein, a second cylindrical spring is sleeved on the outer periphery of the column, one end of the second cylindrical spring is connected to the transverse plate, and the other end is connected to a boss arranged at one end of the column away from the transverse plate.

[0023] The method for using the butterfly valve ladle bottom blowing argon refining device comprises the following steps:

[0024] Step 1: The blowing head corresponds to the position of one of the eccentric air-permeable bricks, and argon is blown into the molten steel from the eccentric position of the ladle bottom;

[0025] Step 2: The rotary drive mechanism drives the blowing head to rotate in a circular direction, and the blowing head changes its position in the circumferential direction of the bottom of the ladle, corresponding to the multiple eccentric air-permeable bricks in sequence;

[0026] Step three, the blowing head completes one circle of rotation, the shift mechanism is triggered, driving the blowing head to move to the center of the bottom of the ladle, corresponding to the central air brick, and the flow rate control mechanism is triggered to reduce the impact of argon gas on the molten steel when the blowing head blows argon from the center of the bottom of the ladle.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is novel in design. When working, the rotary drive mechanism can drive the blowing head to rotate intermittently at the bottom of the ladle, so that the blowing head can correspond to multiple eccentric air bricks in turn, and blow argon into the molten steel at different eccentric positions of the bottom of the ladle, so that the molten steel can have multiple circulation routes, thereby improving the uniformity of the composition and temperature of the molten steel and the removal effect of inclusions. Subsequently, the shift mechanism is triggered to drive the blowing head to move to the center of the bottom of the ladle, so as to facilitate the reaction between the ladle top slag and the molten steel, and achieve a better desulfurization effect. Therefore, the device integrates the functions of eccentric argon blowing and central argon blowing, which can effectively improve the refining effect on the molten steel and provide reliability guarantee for the performance of the final butterfly valve product. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The present invention is a structural schematic diagram of an embodiment of a butterfly valve ladle bottom blowing argon refining device.

[0029] Figure 2 The present invention is a top view of an embodiment of a butterfly valve ladle bottom blowing argon refining device.

[0030] Figure 3 The present invention is a bottom view of an embodiment of a butterfly valve ladle bottom blowing argon refining device.

[0031] Figure 4 This is a schematic diagram of the internal structure of a support in an embodiment of a butterfly valve ladle bottom blowing argon refining device.

[0032] Figure 5 This is a schematic structural diagram from another angle inside the support of an embodiment of a butterfly valve ladle bottom blowing argon refining device.

[0033] Figure 6 for Figure 5 A magnified view of the structure at center.

[0034] Figure 7 This is a schematic structural diagram of a rotary drive mechanism in one embodiment of a butterfly valve ladle bottom blowing argon refining device.

[0035] Figure 8 for Figure 7 Schematic diagram of the structure from another angle.

[0036] Fig. 9 This is a schematic structural diagram of the gas guide mechanism in one embodiment of a butterfly valve ladle bottom blowing argon refining device.

[0037] Fig.10 for Fig. 9 Schematic diagram of the structure from another angle.

[0038] Fig.11 for Fig.10 A magnified view of the structure at point B.

[0039] In the figure: 1, ladle tube; 101, air guide hole; 2, wall brick; 3, support; 4, eccentric air brick; 5, central air brick; 6, blowing head; 7, air inlet; 8, annular tube; 801, annular port; 9, annular member; 10, horizontal plate; 11, first pipe member; 1101, conical part; 12, second pipe member; 13, conical member; 14, driven plate; 1401, first inclined groove; 15, telescopic column; 1501, convex ring; 16, triangular block; 17, first cylindrical spring; 18, connecting rod; 180 1. Boss; 19. Assembly plate; 20. Slider; 21. Side plate; 2101. Second inclined groove; 22. Sleeve; 2201. Column; 23. Cross arm; 24. Trapezoidal plate; 25. Column; 2501. Boss; 26. Second cylindrical spring; 27. Screw rod; 28. Drive motor; 29. ​​Threaded cylinder; 30. Transverse cylinder; 3001. Drive wheel; 31. Driven shaft; 3101. First groove section; 3102. Second groove section; 3103. Straight groove; 32. Bevel gear set; 33. Drive belt. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] In addition, when an element in the present invention is referred to as being "disposed on" or "disposed on" another element, it may be directly on the other element or there may be a centered element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a centered element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0042] See also Figure 1-Figure 11 In an embodiment of the present invention, a butterfly valve ladle bottom blowing argon refining device comprises a support 3 and a molten steel containing component arranged on the support 3, wherein the molten steel containing component comprises a ladle tube 1 placed on the support 3 and a wall brick 2 arranged in the ladle tube 1;

[0043] A central air-permeable brick 5 is embedded in the center of the wall brick 2, and a plurality of eccentric air-permeable bricks 4 are equidistantly arranged along the circumference of the eccentric part, and air guide holes 101 corresponding to the central air-permeable brick 5 and the eccentric air-permeable brick 4 are arranged at the bottom of the steel ladle tube 1;

[0044] The butterfly valve ladle bottom blowing argon refining device also includes:

[0045] A horizontal plate 10 is arranged in the support 3, and a mounting plate 19 is rotatably mounted on the horizontal plate 10. A blowing head 6 is movably arranged on the mounting plate 19 through a shift mechanism. The mounting plate 19 is connected to a rotating driving mechanism installed in the support 3. The blowing head 6 is also connected to an air inlet 7 arranged on the outer wall of the support 3 through a flow rate control mechanism and an air guide mechanism;

[0046] Among them, the rotary drive mechanism can drive the blowing head 6 to rotate intermittently in the support 3, so that the blowing head 6 blows argon into the molten steel through multiple eccentric air bricks 4 in turn. After the blowing head 6 rotates one circle, the shifting mechanism prompts the blowing head 6 to move along the length direction of the assembly plate 19, so that the blowing head 6 corresponds to the central air brick 5, and the flow rate control mechanism reduces the impact of argon on the molten steel.

[0047] It should be noted that the air inlet 7 is connected to an argon pumping device. Specifically, in actual operation, the ladle tube 1 containing molten steel is placed on the support 3. Initially, the blowing head 6 corresponds to one of the eccentric air-permeable bricks 4.

[0048] Then, argon gas is pumped and blown into the molten steel through the air guide hole 101 and the eccentric air brick 4. At this time, the rising bubble flow will cause impact force in the horizontal direction, thereby promoting the circulation of the molten steel, reducing the eddy current area, shortening the mixing time, and at the same time being conducive to the uniformity of the composition and temperature of the molten steel and the removal of inclusions, so that the quality of the molten steel is improved;

[0049] In the above process, the rotation drive mechanism works to drive the blowing head 6 to rotate intermittently in the support 3, so that the blowing head 6 can correspond to the multiple eccentric air bricks 4 in sequence. Since the position of each eccentric air brick 4 is different, the molten steel can have multiple circulation routes of different lines, thereby effectively improving the sufficiency of the circulation of the molten steel. Accordingly, the uniformity of the molten steel composition and temperature and the removal effect of inclusions can be improved;

[0050] After the blowing head 6 completes one rotation, the rotating drive mechanism will trigger the shifting mechanism, and the shifting mechanism drives the blowing head 6 to move along the length direction of the assembly plate 19, so that the blowing head 6 corresponds to the central air-permeable brick 5, and then argon gas will be blown into the molten steel from the bottom center of the ladle tube 1, so as to facilitate the reaction between the ladle top slag and the molten steel, and achieve a better desulfurization effect;

[0051] It should be noted that, compared with central argon blowing, during eccentric argon blowing, in order to ensure that the molten steel can circulate smoothly, the impact force of argon on the molten steel must be large enough. However, when performing central argon blowing, if the impact force remains unabated, it is easy to cause violent churning of the molten steel surface, severe secondary oxidation, large temperature drop and easy slag rolling. In this regard, when the blowing head 6 moves to the central air permeable brick 5, the flow rate control mechanism is triggered, which can reduce the flow rate of argon, thereby reducing the impact force of argon on the molten steel, avoiding a series of problems caused by excessive impact force on the molten steel.

[0052] Please refer again Figure 4 , Figure 7 as well as Figure 8 The rotary drive mechanism includes a driven shaft 31 rotatably mounted in the support 3 and a transverse cylinder 30 slidably sleeved on the driven shaft 31. The driven shaft 31 is connected to the rotating shaft of the assembly plate 19 through a bevel gear set 32 ​​and a transmission belt 33. The transverse cylinder 30 is connected to a threaded driving member provided in the support 3. A straight groove 3103 and a plurality of connected inflection grooves connecting the straight groove 3103 are provided on the outer wall of the driven shaft 31. A ball is provided on the inner wall of the transverse cylinder 30, and the ball is located in the inflection groove. The inflection groove includes a first groove section 3101 and a second groove section 3102 connected to each other. The first groove section 3101 and the straight groove 3103 are both arranged along the axial direction of the driven shaft 31. The second groove section 3102 is arranged along the spiral on the driven shaft 31.

[0053] In detail, a connecting shaft is rotatably mounted on the transverse plate 10, the transmission belt 33 is used to connect the rotating shaft of the assembly plate 19 with the connecting shaft, the bevel gear set 32 ​​includes a first bevel gear arranged on one end of the driven shaft 31 facing the connecting shaft and a second bevel gear installed on the connecting shaft, the second bevel gear meshes with the first bevel gear;

[0054] Secondly, the threaded drive member can drive the transverse cylinder 30 to slide axially along the driven shaft 31. Specifically, the threaded drive member includes a screw rod 27 rotatably installed in the support 3, and a threaded cylinder 29 sleeved on the screw rod 27 and threadedly connected to the screw rod 27. The threaded cylinder 29 is fixed to the transverse cylinder 30, and a drive motor 28 is also installed on the side of the support 3. The output end of the drive motor 28 is connected to the screw rod 27 for driving the screw rod 27 to rotate forward or reverse.

[0055] Taking the state shown in the accompanying drawings as an example, when the driving motor 28 drives the screw rod 27 to rotate, the threaded cylinder 29 will be threadedly matched with the screw rod 27, so that the threaded cylinder 29 will drive the transverse cylinder 30 to slide on the driven shaft 31 along the axial direction of the driven shaft 31. When the ball rolls along the first groove section 3101, the driven shaft 31 does not rotate, and the blowing head 6 maintains a corresponding relationship with one of the eccentric air-permeable bricks 4. When the ball rolls along the second groove section 3102, it will cause the driven shaft 31 to rotate, thereby , the driven shaft 31 drives the assembly plate 19 to rotate through the bevel gear set 32 ​​and the transmission belt 33, so that the blowing head 6 deflects at a certain angle, and the blowing head 6 corresponds to the next eccentric air-permeable brick 4 to change the blowing position of the argon gas, so that the circulation route of the molten steel changes. In this way, the blowing head 6 will rotate intermittently and correspond to multiple eccentric air-permeable bricks 4 in turn, so that the molten steel can have multiple different circulation routes, so as to improve the adequacy of the molten steel treatment, and the uniformity of the molten steel composition and temperature and the removal effect of inclusions can be improved;

[0056] After the ball passes through multiple second groove sections 3102, the assembly plate 19 drives the blowing head 6 to complete a rotation. Then, the ball passes through the straight groove 3103 again. At this time, the shifting mechanism is triggered to prompt the blowing head 6 to move radially along the ladle tube 1, so that the blowing head 6 corresponds to the central air permeable brick 5, and then central argon blowing is performed to facilitate the reaction between the ladle top slag and molten steel, thereby achieving a better desulfurization effect.

[0057] Please refer again Fig. 9 , Fig.10 as well as Fig.11The flow rate regulating mechanism includes a second pipe 12 movably arranged on the assembly plate 19 and fixed to the air blowing head 6, and a first pipe 11 sealingly and slidingly sleeved with the second pipe 12 and connected to the air guide mechanism, and a conical portion 1101 is formed on the first pipe 11. A follower plate 14 is slidably arranged in the first pipe 11, and the follower plate 14 is connected to a conical member 13 adapted to the conical portion 1101. Two first inclined grooves 1401 are symmetrically arranged on the follower plate 14, and the two first inclined grooves 1401 are respectively matched with two groups of elastic members arranged on the first pipe 11. The elastic members are triggered when the air blowing head 6 moves along the length direction of the assembly plate 19, and promote the conical member 13 to move along the axial direction of the first pipe 11.

[0058] The elastic member includes a telescopic column 15 which is sealingly and slidably arranged on the first pipe 11, and a first cylindrical spring 17 is sleeved on the outer periphery of the telescopic column 15, one end of the first cylindrical spring 17 is connected to the outer wall of the first pipe 11, and the other end is connected to a convex ring 1501 arranged on the telescopic column 15. A triangular block 16 is arranged at one end of the telescopic column 15, and a driving column adapted to the first inclined groove 1401 is arranged at the other end, the driving column passes through the first inclined groove 1401 and is slidably connected to the driven plate 14, and two convex columns 1801 are arranged on the second pipe 12 through a connecting rod 18.

[0059] When the shift mechanism is triggered, the second pipe 12 can be driven to slide toward the inside of the first pipe 11 until the air blowing head 6 is transferred from the eccentric air-permeable brick 4 to the central air-permeable brick 5. In the latter part of this process, the convex column 1801 will act on the inclined surface of the triangular block 16, thereby causing the triangular block 16 to give way, and the telescopic column 15 will slide toward the inside of the first pipe 11, the first cylindrical spring 17 will be compressed, and the driving column at the end of the telescopic column 15 will slide with the driven plate 14 through the first inclined groove 1401, so that the driven plate 14 can slide. The plate 14 drives the conical part 13 to move axially along the first pipe fitting 11 and close to the second pipe fitting 12. Furthermore, compared with when the blowing head 6 is located at the eccentric air brick 4, after the blowing head 6 is transferred to the central air brick 5, the gap between the conical part 13 and the inner wall of the conical part 1101 increases. Therefore, the conduction area of ​​argon gas increases. When the subsequent blowing head 6 performs central argon blowing, the impact force of argon gas on molten steel is reduced, thereby avoiding a series of problems caused by excessive impact force on the molten steel (violent churning of the steel liquid surface, severe secondary oxidation, large temperature drop and easy slag rolling).

[0060] Please refer again Fig. 9 and Fig.10The air guide mechanism includes an annular tube 8 installed in the support 3 and connected to the air inlet 7, and an annular member 9 provided on the annular tube 8 and capable of sealing and rotating relative to the annular tube 8. The annular member 9 is fixed to the first pipe member 11, and an annular opening 801 corresponding to the annular member 9 is provided on the annular tube 8.

[0061] When refining molten steel, the argon pumping device pumps argon into the annular tube 8 through the air inlet 7, and then the argon enters the annular member 9 through the annular opening 801, then enters the first pipe member 11, passes through the gap between the inner wall of the conical portion 1101 and the conical member 13, and finally is blown into the molten steel through the second pipe member 12 and the blowing head 6;

[0062] Furthermore, during the processing, the assembly plate 19 drives the blowing head 6 to rotate, and correspondingly, the first pipe member 11 drives the annular member 9 to rotate on the annular tube 8. The setting of the annular port 801 can ensure that the pumping route of the argon gas can be maintained.

[0063] Please refer again Figure 6 , Figure 7 , Figure 8 as well as Fig. 9 The shift mechanism includes a sliding matching assembly mounted on the assembly plate 19 and connected to the second pipe 12, and an elastic trigger structure mounted on the transverse plate 10. The transverse displacement cylinder 30 is provided with two driving wheels 3001 that match the elastic trigger structure. The sliding matching assembly includes a slider 20 that is slidably engaged on the assembly plate 19, and two side plates 21 that are respectively arranged on both sides of the slider 20. The side plates 21 are provided with a second inclined groove 2101. A sleeve 22 is also slidably sleeved on the rotating shaft of the assembly plate 19. A column 2201 that matches the second inclined groove 2101 is fixed on the sleeve 22. The column 2201 passes through the second inclined groove 2101 and is slidably connected to the two side plates 21. The elastic trigger structure includes two columns 25 arranged on the horizontal plate 10, a horizontal arm 23 slidably arranged on the two columns 25 and rotatably connected to the sleeve 22, and a trapezoidal plate 24 cooperating with the driving wheel 3001 is respectively arranged on both sides of the horizontal arm 23;

[0064] The outer periphery of the column 25 is sleeved with a second cylindrical spring 26 , one end of the second cylindrical spring 26 is connected to the transverse plate 10 , and the other end is connected to a boss 2501 arranged at one end of the column 25 away from the transverse plate 10 .

[0065] After the ball bearings on the inner wall of the transverse cylinder 30 pass through multiple second groove sections 3102, the assembly plate 19 drives the blowing head 6 to complete a rotation, and then the ball bearings pass through the straight groove 3103 again. At this time, the driving wheel 3001 acts on the inclined surface on the trapezoidal plate 24, causing the trapezoidal plate 24 to give way. Specifically, the trapezoidal plate 24 drives the cross arm 23 to lift up, the second columnar spring 26 is compressed, and the cross arm 23 drives the sleeve 22 to rise on the rotating axis of the assembly plate 19, and the column 2201 slides with the side plate 21 through the second inclined groove 2101, causing the side plate 21 to drive the second pipe fitting 12 to shrink toward the first pipe fitting 11 through the slider 20, and the blowing head 6 is transferred to the position corresponding to the central air permeable brick 5 to enter the subsequent central argon blowing.

[0066] As another embodiment of the present invention, a method for using the butterfly valve ladle bottom blowing argon refining device is also proposed, comprising the following steps:

[0067] Step 1: The blowing head 6 corresponds to the position of one of the eccentric air-permeable bricks 4, and argon is blown into the molten steel from the eccentric position of the ladle bottom;

[0068] Step 2: The rotary drive mechanism drives the blowing head 6 to rotate in a circular direction, and the blowing head 6 changes its position in the circumferential direction of the ladle bottom, corresponding to the multiple eccentric air-permeable bricks 4 in sequence;

[0069] Step three, the blowing head 6 completes one circle of rotation, the shift mechanism is triggered, driving the blowing head 6 to move to the center of the bottom of the ladle, corresponding to the central air-permeable brick 5, and the flow rate control mechanism is triggered to reduce the impact of argon gas on the molten steel when the blowing head 6 blows argon from the center of the bottom of the ladle.

[0070] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0071] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A butterfly valve ladle bottom blowing argon refining device, comprising a support (3) and a molten steel containing component arranged on the support (3), wherein the molten steel containing component comprises a ladle tube (1) placed on the support (3) and a wall brick (2) arranged in the ladle tube (1); A central air-permeable brick (5) is embedded in the center of the wall brick (2), and a plurality of eccentric air-permeable bricks (4) are equidistantly arranged along the circumference of the eccentric part, and air guide holes (101) corresponding to the central air-permeable brick (5) and the eccentric air-permeable brick (4) are arranged at the bottom of the steel ladle tube (1); It is characterized in that Also includes: A transverse plate (10) is arranged in the support (3), a mounting plate (19) is rotatably mounted on the transverse plate (10), a blowing head (6) is movably arranged on the mounting plate (19) via a shifting mechanism, the mounting plate (19) is connected to a rotating driving mechanism installed in the support (3), and the blowing head (6) is also connected to an air inlet (7) arranged on the outer wall of the support (3) through a flow rate control mechanism and an air guide mechanism; The rotary drive mechanism is capable of driving the blowing head (6) to rotate intermittently in the support (3), so that the blowing head (6) blows argon into the molten steel through the plurality of eccentric air-permeable bricks (4) in sequence; when the blowing head (6) rotates one circle, the shifting mechanism causes the blowing head (6) to move along the length direction of the assembly plate (19), so that the blowing head (6) corresponds to the central air-permeable brick (5); and the flow rate control mechanism reduces the impact of argon on the molten steel.

2. The butterfly valve ladle bottom blowing argon refining device according to claim 1 is characterized in that: The rotary drive mechanism comprises a driven shaft (31) rotatably mounted in the support (3) and a transverse cylinder (30) slidably sleeved on the driven shaft (31), the driven shaft (31) being connected to the rotating shaft of the assembly plate (19) via a bevel gear set (32) and a transmission belt (33), and the transverse cylinder (30) being connected to a threaded driving member disposed in the support (3); In which, a straight groove (3103) and a plurality of connected curved grooves connecting the straight groove (3103) are provided on the outer wall of the driven shaft (31), a ball is provided on the inner wall of the transverse cylinder (30), and the ball is located in the curved groove, and the curved groove includes a first groove section (3101) and a second groove section (3102) connected to each other, the first groove section (3101) and the straight groove (3103) are both arranged along the axial direction of the driven shaft (31), and the second groove section (3102) is arranged along a spiral on the driven shaft (31).

3. The butterfly valve ladle bottom blowing argon refining device according to claim 2 is characterized in that: The flow rate regulating mechanism comprises a second pipe member (12) movably arranged on the assembly plate (19) and fixed to the air blowing head (6), and a first pipe member (11) sealingly and slidably fitted with the second pipe member (12) and connected to the air guide mechanism, wherein a tapered portion (1101) is formed on the first pipe member (11); A follower plate (14) is slidably provided inside the first pipe fitting (11), and the follower plate (14) is connected to a conical piece (13) adapted to the conical portion (1101). Two first inclined grooves (1401) are symmetrically provided on the follower plate (14), and the two first inclined grooves (1401) respectively cooperate with two groups of elastic pieces provided on the first pipe fitting (11). When the blowing head (6) moves along the length direction of the assembly plate (19), the elastic pieces are triggered and cause the conical piece (13) to move axially along the first pipe fitting (11).

4. The butterfly valve ladle bottom blowing argon refining device according to claim 3 is characterized in that: The elastic member comprises a telescopic column (15) sealingly and slidably arranged on the first pipe (11), a first cylindrical spring (17) is sleeved on the outer circumference of the telescopic column (15), one end of the first cylindrical spring (17) is connected to the outer wall of the first pipe (11), and the other end is connected to a convex ring (1501) arranged on the telescopic column (15); One end of the telescopic column (15) is provided with a triangular block (16), and the other end is provided with a driving column adapted to the first inclined groove (1401), the driving column passes through the first inclined groove (1401) and is slidably connected to the driven plate (14), and two protruding columns (1801) are provided on the second pipe (12) through a connecting rod (18).

5. The butterfly valve ladle bottom blowing argon refining device according to claim 3 is characterized in that: The air guide mechanism comprises an annular tube (8) installed in the support (3) and connected to the air inlet (7), and an annular member (9) provided on the annular tube (8) and capable of sealing and rotating relative to the annular tube (8), the annular member (9) being fixed to the first tube member (11), and the annular tube (8) being provided with an annular opening (801) corresponding to the annular member (9).

6. The butterfly valve ladle bottom blowing argon refining device according to claim 3, characterized in that: The displacement mechanism comprises a sliding fitting assembly mounted on the assembly plate (19) and connected to the second pipe (12), and an elastic trigger structure mounted on the transverse plate (10); and the transverse displacement cylinder (30) is provided with two driving wheels (3001) that cooperate with the elastic trigger structure.

7. The butterfly valve ladle bottom blowing argon refining device according to claim 6, characterized in that: The sliding fitting assembly comprises a slider (20) slidably engaged on the assembly plate (19), and two side plates (21) respectively arranged on both sides of the slider (20), wherein the side plate (21) is provided with a second inclined groove (2101), and a sleeve (22) is also slidably sleeved on the rotating shaft of the assembly plate (19), and a column (2201) adapted to the second inclined groove (2101) is fixedly provided on the sleeve (22), and the column (2201) passes through the second inclined groove (2101) and is slidably connected to the two side plates (21).

8. The butterfly valve ladle bottom blowing argon refining device according to claim 7, characterized in that: The elastic trigger structure comprises two upright posts (25) arranged on the horizontal plate (10), a horizontal arm (23) slidably arranged on the two upright posts (25) and rotatably connected to the sleeve (22), and a trapezoidal plate (24) cooperating with the driving wheel (3001) is respectively arranged on both sides of the horizontal arm (23); Wherein, a second cylindrical spring (26) is sleeved on the outer periphery of the column (25), one end of the second cylindrical spring (26) is connected to the transverse plate (10), and the other end is connected to a boss (2501) arranged at one end of the column (25) away from the transverse plate (10).

9. The method for using the butterfly valve ladle bottom blowing argon refining device according to claim 1, characterized in that: The following steps are involved: Step 1: The blowing head (6) corresponds to the position of one of the eccentric air-permeable bricks (4), and argon is blown into the molten steel from the eccentric position of the bottom of the ladle; Step 2: The rotary drive mechanism drives the blowing head (6) to rotate in a circular motion, and the blowing head (6) changes its position in the circumferential direction of the bottom of the ladle, corresponding to the plurality of eccentric air-permeable bricks (4) in sequence; Step 3: After the blowing head (6) completes one rotation, the shift mechanism is triggered to drive the blowing head (6) to move to the center of the bottom of the ladle to correspond to the central air-permeable brick (5), and the flow rate control mechanism is triggered to reduce the impact of argon gas on the molten steel when the blowing head (6) blows argon from the center of the bottom of the ladle.

Images