Anti-blocking structure of a ladle purging plug for thread steel smelting

Abstract

The present application relates to threaded steel smelting technical field, and disclose a kind of threaded steel smelting with steel ladle air brick anti-blocking structure, including conical shell, the inside of the conical shell is installed with air brick, conical shell is equipped with inlet gas chamber, inlet gas chamber is located below air brick, one side of conical shell is equipped with stable inlet pipe, the other side of conical shell is equipped with impact anti-blocking component, the inside of inlet gas chamber is provided with cyclone generating component, impact anti-blocking component includes the oscillation inlet pipe of being installed in one side of conical shell, first check valve is installed in the end of oscillation inlet pipe close to conical shell, the top end of oscillation inlet pipe is equipped with connecting pipe, the present application, by stable inlet pipe keeps argon into, maintains positive pressure, while piston block reciprocating moves in oscillation inlet pipe, intermittently from oscillation inlet pipe into argon towards air brick, play the role of supplementary inlet impact oscillation, improve impact anti-blocking effect.

Description

Technical Field

[0001] This invention belongs to the field of rebar smelting technology, specifically a structure for preventing blockage of a ladle permeable brick in rebar smelting. Background Technology

[0002] In the rebar smelting process, the ladle permeable brick is a core component of the bottom-blown argon refining system. It continuously introduces argon gas into the molten steel through micropores or narrow slits within the brick. The rising and agitating action of the argon bubbles stirs the molten steel, achieving uniformity in temperature and alloy composition. Simultaneously, it effectively removes gases and non-metallic inclusions from the molten steel, optimizing the purity of the rebar and ensuring the stability of the mechanical properties and production quality of the finished product. It is a crucial component for improving the quality of rebar smelting. The rebar smelting process is characterized by numerous alloy inclusions in the molten steel, high slag viscosity, and frequent start-ups and shutdowns of the refining process. The permeable brick needs to be intermittently started and stopped to coordinate with the smelting rhythm, but the following drawbacks still exist:

[0003] After the smelting operation is completed and the argon gas supply is stopped, the internal air pressure of the permeable brick gas channel dissipates rapidly, creating a pressure difference between the inside and outside of the gas channel. The high-temperature molten steel and highly viscous steel slag inside the ladle are easily invaded and filled into the micropores or narrow slits of the permeable brick gas channel under the static pressure of the molten steel. Then, they quickly solidify upon cooling and accumulate, directly causing blockage and stagnation of the permeable brick gas channel, resulting in a significant reduction in the effective ventilation area of ​​the permeable brick or even complete failure. Summary of the Invention

[0004] In view of the above situation and to overcome the defects of the prior art, the present invention provides a ventilated brick anti-clogging structure for rebar smelting, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a structure for preventing blockage of a ventilated brick in a steel ladle for rebar smelting, comprising a conical shell, a ventilated brick installed inside the conical shell, an air inlet chamber located below the ventilated brick inside the conical shell, a stable air inlet pipe installed on one side of the conical shell, an impact anti-blockage component installed on the other side of the conical shell, and a swirl generation component installed inside the air inlet chamber;

[0006] The impact anti-blocking assembly includes an oscillating intake pipe installed on one side of the conical housing. A first one-way valve is installed at the end of the oscillating intake pipe near the conical housing. A connecting pipe is installed at the top of the oscillating intake pipe. The connecting pipe is located on the side of the first one-way valve away from the conical housing. A second one-way valve is installed inside the connecting pipe. A piston block is movably installed inside the oscillating intake pipe. The piston block is located on the side of the connecting pipe away from the conical housing.

[0007] Preferably, both the stabilizing air inlet pipe and the oscillating air inlet pipe are connected to the air inlet chamber. The other end of the stabilizing air inlet pipe and the end of the connecting pipe are connected to an argon gas source via a flexible hose. An air inlet valve is provided on both the stabilizing air inlet pipe and the connecting pipe.

[0008] Preferably, a push rod is fixedly installed on the side of the piston block away from the conical housing, one end of the push rod extends through to the outside of the oscillating intake pipe, and a vertical rod is fixedly installed on one end of the push rod.

[0009] Preferably, a fixed shaft is fixedly installed at the bottom end of the vertical rod, and a connecting rod is rotatably installed on the outer side of the fixed shaft.

[0010] Preferably, the swirl generating component includes a rotating cylinder disposed inside the air intake chamber, with filter holes evenly distributed around the circumference of the rotating cylinder, and fan blades installed at equal angles on the inner sidewall of the rotating cylinder.

[0011] Preferably, a first connecting shaft is coaxially mounted at the bottom end of the rotating cylinder. The first connecting shaft is rotatably connected to the conical shell. Two circular plates are provided below the first connecting shaft. The upper circular plate is coaxially and fixedly connected to the first connecting shaft. An eccentric shaft is eccentrically mounted between the two circular plates. The other end of the connecting rod is rotatably connected to the eccentric shaft.

[0012] Preferably, a second connecting shaft is coaxially mounted on the bottom end of the lower circular plate, and one end of the second connecting shaft is fixedly connected to the output shaft of the drive motor.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) In this invention, argon gas is kept flowing in through the stable inlet pipe to maintain positive pressure, while the piston block in the oscillating inlet pipe moves back and forth, intermittently introducing argon gas from the oscillating inlet pipe into the permeable brick, which plays a role in supplementing the inlet gas impact oscillation and improving the impact anti-blocking effect.

[0015] (2) In this invention, the argon gas is filtered by the filter holes on the circumferential direction of the rotating cylinder. At the same time, the fan blades on its inner wall cause the incoming argon gas to swirl during the rotation of the rotating cylinder, which improves the impact on impurities and further achieves the effect of impact and anti-blocking. In addition, during the rotation, the piston block is driven by the eccentric shaft and connecting rod to achieve reciprocating movement. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0017] In the attached diagram:

[0018] Figure 1 This is a schematic diagram of the internal structure of the conical shell of the present invention;

[0019] Figure 2 This is a schematic diagram of the external structure of the conical shell of the present invention;

[0020] Figure 3 This is a schematic diagram of the impact anti-clogging component structure of the present invention;

[0021] Figure 4 This is a schematic diagram of the swirl generation component structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the bottom structure of the rotating cylinder of the present invention;

[0023] In the diagram: 1. Conical shell; 2. Breathable brick; 3. Inlet chamber; 4. Stabilizing inlet pipe; 5. Impact anti-clogging component; 51. Oscillating inlet pipe; 52. First one-way valve; 53. Connecting pipe; 54. Second one-way valve; 55. Piston block; 56. Push rod; 57. Vertical rod; 58. Fixed shaft; 59. Connecting rod; 6. Swirl generation component; 61. Rotating cylinder; 62. Filter hole; 63. Fan blade; 64. First connecting shaft; 65. Circular plate; 66. Second connecting shaft; 67. Drive motor; 68. Eccentric shaft. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] Example 1, by Figures 1-2 The present invention relates to an anti-clogging structure for a ventilated brick in a steel ladle for rebar smelting, comprising a conical shell 1, a ventilated brick 2 installed inside the conical shell 1, an air inlet chamber 3 located below the ventilated brick 2, a stable air inlet pipe 4 installed on one side of the conical shell 1, an impact anti-clogging component 5 installed on the other side of the conical shell 1, and a swirl generating component 6 disposed inside the air inlet chamber 3.

[0026] Depend on Figure 3The impact anti-blocking assembly 5 includes an oscillating air intake pipe 51 installed on one side of the conical housing 1. A first one-way valve 52 is installed at the end of the oscillating air intake pipe 51 near the conical housing 1. A connecting pipe 53 is installed at the top of the oscillating air intake pipe 51, located on the side of the first one-way valve 52 away from the conical housing 1. A second one-way valve 54 is installed inside the connecting pipe 53. A piston block 55 is movably installed inside the oscillating air intake pipe 51, located on the side of the connecting pipe 53 away from the conical housing 1. A push rod 56 is fixedly installed on one side of the housing 1. One end of the push rod 56 extends through the outside of the oscillating air intake pipe 51. A vertical rod 57 is fixedly installed on one end of the push rod 56. A fixed shaft 58 is fixedly installed at the bottom end of the vertical rod 57. A connecting rod 59 is installed on the outside of the fixed shaft 58 to limit rotation. The stabilizing air intake pipe 4 keeps argon gas flowing in and maintains positive pressure. Meanwhile, the piston block 55 inside the oscillating air intake pipe 51 moves back and forth, intermittently introducing argon gas from the oscillating air intake pipe 51 into the permeable brick 2, which supplements the air intake impact oscillation and improves the impact anti-blocking effect.

[0027] Both the stabilizing inlet pipe 4 and the oscillating inlet pipe 51 are connected to the inlet chamber 3. The other end of the stabilizing inlet pipe 4 and the end of the connecting pipe 53 are connected to an argon gas source via a flexible hose. Both the stabilizing inlet pipe 4 and the connecting pipe 53 are equipped with inlet valves.

[0028] Depend on Figures 4-5 The swirl generating assembly 6 includes a rotating cylinder 61 disposed inside the air intake chamber 3. Filter holes 62 are evenly distributed around the circumference of the rotating cylinder 61. Fan blades 63 are installed at equal angles on the inner wall of the rotating cylinder 61. A first connecting shaft 64 is coaxially mounted at the bottom end of the rotating cylinder 61. The first connecting shaft 64 is rotatably connected to the conical housing 1. Two circular plates 65 are disposed below the first connecting shaft 64, with the upper circular plate 65 coaxially and fixedly connected to the first connecting shaft 64. An eccentric shaft 68 is eccentrically mounted between the two circular plates 65. The connecting rod 59... One end is rotatably connected to the eccentric shaft 68. The bottom end of the lower circular plate 65 is coaxially mounted with a second connecting shaft 66. One end of the second connecting shaft 66 is fixedly connected to the output shaft of the drive motor 67. The filter holes 62 on the circumferential direction of the rotating cylinder 61 filter the argon gas. At the same time, the fan blades 63 on its inner sidewall cause the incoming argon gas to swirl during the rotation of the rotating cylinder 61, which improves the impact on impurities and further plays the role of impact anti-clogging. In addition, during the rotation, the piston block 55 is driven to reciprocate through the eccentric shaft 68 and the connecting rod 59.

[0029] Working principle: When in use, open the air inlet valve on the stable air inlet pipe 4. Argon gas from the argon gas source enters the air inlet chamber 3 through the stable air inlet pipe 4, and then enters the ladle through the pores of the permeable brick 2.

[0030] When the permeable brick 2 needs to be unblocked, keep the argon gas stable in the stable inlet pipe 4 to maintain positive pressure and prevent molten steel and steel slag from seeping into the gas passage inside the permeable brick 2. Then open the inlet valve on the connecting pipe 53. The second one-way valve 54 is used to allow argon gas from the argon gas source to enter the oscillating inlet pipe 51. When it cannot be discharged from the connecting pipe 53, the first one-way valve 52 is used to allow argon gas in the oscillating inlet pipe 51 to enter the inlet gas chamber 3.

[0031] Turn on the drive motor 67 to drive the rotating cylinder 61 to rotate continuously. The filter holes 62 on the circumferential direction of the rotating cylinder 61 are used to filter the argon gas to prevent impurities in the argon gas from causing blockage of the gas passage. At the same time, the fan blades 63 on the inner wall of the rotating cylinder 61 drive the argon gas spiral into the permeable brick 2, which increases the impact force on the molten steel and slag in the permeable brick 2 and improves the anti-blocking effect.

[0032] Since the eccentric shaft 68 is eccentrically positioned between the two circular plates 65, when the circular plates 65 rotate, one end of the connecting rod 59 moves with the eccentric shaft 68, while the other end of the connecting rod 59 is rotatably connected to the fixed shaft 58, thereby driving the piston block 55 to move back and forth continuously in the oscillating air intake pipe 51, thus intermittently introducing argon gas from the oscillating air intake pipe 51 into the permeable brick 2, which plays a role in supplementing the air intake impact oscillation and improving the anti-blocking effect.

Claims

1. A structure for preventing blockage of a ventilated brick in a steel ladle for rebar smelting, comprising a conical shell (1), characterized in that: The conical shell (1) is equipped with a breathable brick (2) inside. An air inlet chamber (3) is opened inside the conical shell (1). The air inlet chamber (3) is located below the breathable brick (2). A stable air inlet pipe (4) is installed on one side of the conical shell (1). An impact anti-blocking component (5) is installed on the other side of the conical shell (1). A vortex generating component (6) is installed inside the air inlet chamber (3). The impact anti-blocking assembly (5) includes an oscillating air intake pipe (51) installed on one side of the conical housing (1). A first one-way valve (52) is installed at one end of the oscillating air intake pipe (51) near the conical housing (1). A connecting pipe (53) is installed at the top of the oscillating air intake pipe (51). The connecting pipe (53) is located on the side of the first one-way valve (52) away from the conical housing (1). A second one-way valve (54) is installed inside the connecting pipe (53). A piston block (55) is movably installed inside the oscillating air intake pipe (51). The piston block (55) is located on the side of the connecting pipe (53) away from the conical housing (1).

2. The anti-clogging structure for a ventilated brick in a steel ladle for rebar smelting according to claim 1, characterized in that: Both the stable air inlet pipe (4) and the oscillating air inlet pipe (51) are connected to the air inlet chamber (3). The other end of the stable air inlet pipe (4) and the end of the connecting pipe (53) are connected to an argon gas source via a flexible hose. An air inlet valve is provided on both the stable air inlet pipe (4) and the connecting pipe (53).

3. The anti-clogging structure for a ventilated brick in a steel ladle for rebar smelting according to claim 1, characterized in that: A push rod (56) is fixedly installed on the side of the piston block (55) away from the conical shell (1). One end of the push rod (56) extends through to the outside of the oscillating intake pipe (51), and a vertical rod (57) is fixedly installed on one end of the push rod (56).

4. The anti-clogging structure for a permeable brick in a steel ladle for rebar smelting according to claim 3, characterized in that: A fixed shaft (58) is fixedly installed at the bottom end of the vertical rod (57), and a connecting rod (59) is installed on the outer side of the fixed shaft (58) for limiting rotation.

5. The anti-clogging structure for a ventilated brick in a steel ladle for rebar smelting according to claim 1, characterized in that: The swirling generation component (6) includes a rotating cylinder (61) disposed inside the air inlet chamber (3). The rotating cylinder (61) has filter holes (62) evenly distributed in the circumferential direction, and fan blades (63) are installed at equal angles on the inner side wall of the rotating cylinder (61).

6. The anti-clogging structure for a ventilated brick in a steel ladle for rebar smelting according to claim 5, characterized in that: The bottom end of the rotating cylinder (61) is coaxially mounted with a first connecting shaft (64), which is rotatably connected to the conical shell (1). Two circular plates (65) are provided below the first connecting shaft (64), with the upper circular plate (65) being coaxially fixedly connected to the first connecting shaft (64). An eccentric shaft (68) is eccentrically mounted between the two circular plates (65), and the other end of the connecting rod (59) is rotatably connected to the eccentric shaft (68).

7. The anti-clogging structure for a ventilated brick in a steel ladle for rebar smelting according to claim 6, characterized in that: A second connecting shaft (66) is coaxially mounted on the bottom end of the circular plate (65) below, and one end of the second connecting shaft (66) is fixedly connected to the output shaft of the drive motor (67).

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