Pouring device for smelting die steel

Abstract

The invention relates to the technical field of smelting steel pouring equipment, in particular to a pouring device for die steel smelting, an exhaust ring is fixedly arranged on the outer ring of a liquid outlet of a steel ladle, an air outlet ring is arranged below the exhaust ring, a drainage piece is movably attached to the interior of the liquid outlet, and by unlocking a lock catch, the air outlet ring and the drainage piece freely fall down; molten steel column flow is protected by an argon gas wall on the outer side until the gas outlet ring is clamped in the funnel cavity, the drainage piece is attached to the inner wall of the central injection pipe and continues to slide off, the drainage piece prevents the atmosphere in the central injection pipe from making contact with the molten steel column flow and pushes the atmosphere in the central injection pipe to be exhausted from the exhaust port, and the drainage piece stops when falling to the inner bottom end of the central injection pipe; molten steel is injected into the through opening along the top end of the drainage piece, column flow can be stably and slowly released, through protection of the argon gas wall and the drainage piece, the molten steel column flow is prevented from being affected by atmospheric oxidation, the molten steel column flow does not make contact with the low-temperature gas environment in the middle injection pipe, and the problems of molten steel temperature drop nodulation or argon gas involving and the like are solved.

Description

Technical Field

[0001] The invention relates to the technical field of smelting steel pouring equipment, in particular to a pouring device for smelting mold steel. Background Art

[0002] Mold steel can be produced by die casting. The basic process includes smelting, pouring, mold cooling, demoulding, molding, etc. Among them, the control of pouring quality plays a particularly important role in the quality of the finished product. The actual pouring production mostly adopts the pouring method. The pouring device includes a center pouring pipe. The top of the center pouring pipe is provided with a funnel cavity for docking with the liquid outlet at the bottom of the ladle. The bottom end of the center pouring pipe is connected with a cross flow channel. The end of the cross flow channel away from the center pouring pipe is provided with a mold bottom port for docking with the ingot mold cavity. The center pouring pipe and the cross flow channel can be made of refractory bricks. First, align the ladle outlet with the center pouring pipe. After the position is adjusted, After the formation, the liquid outlet is opened, and the molten steel is poured into the center pouring pipe along the funnel cavity, and then injected into the steel ingot mold cavity along the cross flow channel and the bottom of the mold. Problems existing in the pouring process include that the molten steel has a large impact on the refractory brick wall along the flow direction, especially at the bottom of the center pouring pipe, the molten steel falls to the bottom of the center pouring pipe due to gravity, and turns to flow to the cross flow channel, which is easy to cause slag rolls and pollute the molten steel. The prior art, such as a mold casting pouring device disclosed in CN107876700A, reduces the jet speed and improves the quality of the steel ingot by optimizing the internal structure of the bottom brick of the mold at the tail of the cross flow channel, but the bottom of the center pouring pipe has not been improved; In addition, there is a space exposed to the air between the ladle outlet and the top gate of the middle pouring pipe. The contact between the molten steel and the atmosphere will inevitably cause secondary oxidation, affecting the purity of the molten steel. In this regard, the prior art practice is to set a ring pipe near the outlet and pass argon gas to form an air curtain around the molten steel. For example, CN103962517B discloses a casting device and a casting method for a die-cast electrode rod, thereby isolating the atmosphere. However, the problem is that the open gate design at the top of the middle pouring pipe causes air to remain in the flow channel, so that the air still affects the molten steel in the early stage of pouring. In this regard, the outlet and the gate of the middle pouring pipe can also be directly made into a fully sealed form to completely The atmosphere can be blocked, but since the ladle needs to be moved, a detachable fully sealed structure must be made between the ladle and the pouring pipe. The equipment is complex and a large area of ​​vacuum pumping is required, which is costly and time-consuming. The conventional practice is to flush argon into the fully sealed flow channel to replace the air therein, but the problem is that if argon is continuously filled in, excessive argon will easily be drawn into the molten steel flow, resulting in quality problems such as subcutaneous bubbles, pinholes or slag rolls during the solidification process of the ingot. In addition, due to the large temperature difference between the argon temperature and the molten steel flow, especially in the initial stage of pouring, the argon absorbs a large amount of heat from the exposed steel flow, which causes the molten steel temperature to drop too quickly, which is easy to form nodules and affects the quality of the ingot product. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a pouring device for smelting mold steel to solve part or all of the above-mentioned problems.

[0004] Based on the above purpose, the present invention provides a pouring device for mold steel smelting, including a center pouring pipe, a funnel cavity is provided at the top of the center pouring pipe, which is used to dock with the liquid outlet at the bottom of the ladle, and a cross flow channel is connected to the bottom of the center pouring pipe. The end of the cross flow channel away from the center pouring pipe is provided with a mold bottom port, which is used to dock with the ingot mold cavity: A through hole communicating with the horizontal flow channel is provided at the bottom side end of the middle injection pipe, and a vertical slide plate is vertically slidably connected to the through hole to close the through hole, and an exhaust port is provided at the inner bottom end of the middle injection pipe; An exhaust ring is fixedly provided at the outer ring of the liquid outlet, an air outlet ring is provided below the exhaust ring, a plurality of exhaust holes are provided around the bottom end of the exhaust ring, a plurality of upper air outlet holes are provided around the top end of the air outlet ring, and air is discharged upward through the upper air outlet holes and discharged through the exhaust holes, so as to form an air wall between the exhaust ring and the air outlet ring; A drainage piece is movably attached to the liquid outlet, and a lock buckle is provided at the bottom end of the ladle, which is pressed against the bottom end of the gas outlet ring through the lock buckle, so that the gas outlet ring is tightly attached to the bottom end of the exhaust ring and fixed; By unlocking the lock, the air outlet ring and the guide piece fall downward, and the upper air outlet hole discharges air upward until the air outlet ring is clamped in the funnel cavity. The guide piece sticks to the inner wall of the middle injection tube and continues to slide down until it falls to the bottom end of the middle injection tube. The guide piece pushes the vertical slide plate downward to make the middle injection tube and the cross flow channel communicate with each other through the opening.

[0005] Preferably, a plurality of lower air outlet holes are provided at the bottom end of the air outlet ring.

[0006] Preferably, the inner ring of the air outlet ring is rotatably connected to multiple sealing plates. When the sealing plates rotate parallel to the air outlet ring, the inner ring of the air outlet ring is closed to support the drainage piece. When the air outlet ring falls until it is engaged in the funnel cavity, the drainage piece pushes the sealing plate downward to rotate the sealing plate downward.

[0007] Preferably, the horizontal end surface of the sealing plate is designed to be triangular in shape.

[0008] Preferably, a transverse slide plate is slidably connected to the bottom end of the air outlet ring, and when the sealing plate rotates downward, the transverse slide plate is pushed outward to close the lower air outlet hole.

[0009] Preferably, a groove is provided at one end of the sealing plate close to the cross slide plate, and the concave surface of the groove is designed as an arc-shaped end surface. When the sealing plate rotates downward, the arc-shaped concave surface of the groove pushes the inner end of the cross slide plate to push the cross slide plate outward.

[0010] Preferably, when the lock buckle is pressed against the bottom end of the air outlet ring, one end of the lock buckle abuts against the outer end of the horizontal sliding plate to prevent the sealing plate from rotating downward.

[0011] Preferably, the inner diameter of the liquid outlet is designed to gradually decrease from bottom to top, and a flexible sealing pad is provided at the bottom end of the exhaust ring away from the exhaust hole. The flexible sealing pad is pressed upward by the exhaust ring to make the guide piece press upward against the inner wall of the liquid outlet for sealing.

[0012] Preferably, the side end of the vertical slide is connected to a side platform, and when the drainage member falls to the bottom end of the center injection tube, it pushes the side platform downward, driving the vertical slide to move downward.

[0013] The beneficial effects of the present invention are as follows: an exhaust ring is fixedly provided at the outer ring of the liquid outlet of the ladle, an outlet ring is provided below the exhaust ring, a guide piece is movably attached to the liquid outlet, and the bottom end of the outlet ring is pressed against by a lock buckle so that the outlet ring is fixed tightly against the bottom end of the exhaust ring, and the lock buckle is unlocked so that the outlet ring and the guide piece can fall freely downward, and the upper outlet hole discharges gas upward at the same time, and the steel liquid column flow is protected by the argon gas wall on the outside until the outlet ring is clamped in the funnel cavity, and the guide piece is attached to the inner wall of the middle injection tube and continues to slide down, and the guide piece blocks the atmosphere in the middle injection tube from contacting with the steel liquid column flow, and pushes the large gas in the middle injection tube to The gas is discharged from the exhaust port, and the guide piece stops when it falls to the bottom end of the center injection tube. The guide piece pushes the vertical slide downward to make the center injection tube and the cross flow channel communicate with each other through the through port. At this time, the guide piece is attached to the bottom end of the center injection tube, and the molten steel is injected into the through port along the top of the guide piece, which is conducive to stable slow-release column flow. The argon gas wall and the guide piece protect the molten steel column flow from being affected by atmospheric oxidation at the open gate and in the center injection tube. In the process of the molten steel column flow flowing down, it is always in direct contact with the guide piece instead of the low-temperature gas environment in the center injection tube, so as to avoid problems such as nodules due to temperature drop of the molten steel or the involvement of argon gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the structure when the lock buckle of the present invention is pressed against the bottom end of the air outlet ring; Figure 3 It is a schematic diagram of the structure when the air outlet ring of the present invention is clamped in the funnel cavity; Figure 4 It is a structural schematic diagram of the drainage piece of the present invention when it is attached to the inner wall of the injection tube and slides down; Figure 5 It is a bottom view structural schematic diagram of the exhaust ring of the present invention; Figure 6It is a schematic diagram of the top view of the structure of the air outlet ring of the present invention; Figure 7 It is a bottom view structural schematic diagram of the air outlet ring of the present invention; Figure 8 It is a front view structural schematic diagram of the air outlet ring of the present invention; Fig. 9 It is a structural schematic diagram of the sealing plate of the present invention when it rotates downward; Fig.10 It is a schematic diagram of the structure when the transverse sliding plate of the present invention moves outward and closes the lower air outlet hole; Fig.11 It is a schematic diagram of the structure when the drainage piece of the present invention falls to the bottom end of the middle injection tube; Fig.12 It is a structural schematic diagram of the present invention when the liquid outlet is designed with a variable diameter and the lock is tightly pressed against the air outlet ring; Fig.13 It is a schematic structural diagram of the present invention in which the liquid outlet is designed with a variable diameter and the air outlet ring falls.

[0016] The markings in the figure are: 100, center injection pipe; 101, through port; 200, funnel cavity; 201, slide bar; 300, ladle; 301, liquid outlet; 400, horizontal flow channel; 401, bottom opening of mold; 1, vertical slide plate; 2, exhaust port; 3, exhaust ring; 31, exhaust hole; 32, exhaust pipe; 4, exhaust ring; 41, upper exhaust hole; 42, exhaust pipe; 43, lower exhaust hole; 44, horizontal slide plate; 5, drainage piece; 6, lock buckle; 7, sealing plate; 71, groove; 8, flexible sealing pad; 9, side platform. DETAILED DESCRIPTION

[0017] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0018] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0019] like Figures 1 to 11 As shown, a pouring device for smelting mold steel includes a center pouring pipe 100, a funnel cavity 200 is provided at the top of the center pouring pipe 100, which is used to dock with the liquid outlet 301 at the bottom end of the ladle 300, and the bottom end of the center pouring pipe 100 is connected to a cross flow channel 400, and the end of the cross flow channel 400 away from the center pouring pipe 100 is provided with a mold bottom port 401, which is used to dock with the ingot mold cavity, and the bottom side end of the center pouring pipe 100 is provided with a through port 101 connected to the cross flow channel 400, and a vertical slide plate 1 is vertically slidably connected at the through port 101 to close the through port 101, and an exhaust port 2 is provided at the inner bottom end of the center pouring pipe 100, and an exhaust ring 3 is fixedly provided at the outer circle of the liquid outlet 301, and an air outlet ring 4 is provided below the exhaust ring 3, and a plurality of exhaust holes 31 are provided around the bottom end of the exhaust ring 3, and the air outlet ring 4 has a plurality of exhaust holes 31. A plurality of upper air outlet holes 41 are provided around the top, through which air is discharged upward and discharged through the exhaust holes 31, so as to form an air wall between the exhaust ring 3 and the air outlet ring 4. A guide piece 5 is movably attached to the liquid outlet 301, and a lock buckle 6 is provided at the bottom end of the ladle 300, which is pressed against the bottom end of the air outlet ring 4 by the lock buckle 6 to fix the air outlet ring 4 tightly to the bottom end of the exhaust ring 3. By unlocking the lock buckle 6, the air outlet ring 4 and the guide piece 5 fall downward, and at the same time, the upper air outlet holes 41 discharge air upward until the air outlet ring 4 is clamped in the funnel cavity 200. The guide piece 5 continues to slide along the middle injection pipe 100 until it falls to the bottom end of the middle injection pipe 100, and then pushes the vertical slide plate 1 downward through the guide piece 5, so that the middle injection pipe 100 and the cross flow channel 400 are connected through the through-port 101.

[0020] The present invention is based on the existing pouring device, including a center pouring pipe 100, a funnel cavity 200 is provided at the top of the center pouring pipe 100, which is used to dock with the liquid outlet 301 at the bottom of the ladle 300, and the bottom of the center pouring pipe 100 is connected with a cross flow channel 400, and the end of the cross flow channel 400 away from the center pouring pipe 100 is provided with a mold bottom opening 401, which is used to dock with the ingot mold cavity, wherein the center pouring pipe 100, the funnel cavity 200, and the cross flow channel 400 can all be made of refractory bricks, the funnel cavity 200 is made of refractory bricks with an open top, and the top of the funnel cavity 200 is open, that is, a pouring gate for pouring molten steel is formed, and the tail of the cross flow channel 400 is made of a tail brick that turns upward, and a through hole is opened at the top of the tail brick. The molten steel is poured into the ingot mold cavity through a pouring port 301, and is led into the ingot mold cavity through the funnel cavity 200, the center pouring pipe 100, the cross flow channel 400, and the bottom port 401 in sequence to form a pouring passage. A through port 101 communicating with the cross flow channel 400 is provided at the bottom side end of the center pouring pipe 100. The cross flow channel 400 may be provided with a plurality of channels, which are respectively connected with a plurality of ingot mold cavities for pouring. A plurality of corresponding through ports 101 are also provided. A vertical slide plate 1 is vertically slidably connected at the through port 101 to close the through port 101. An exhaust port 2 is provided at the inner bottom end of the center pouring pipe 100. An exhaust ring 3 is fixedly provided at the outer ring of the liquid outlet 301, and an exhaust ring 4 is provided below the exhaust ring 3. Figure 5 , Figure 6 As shown, a plurality of exhaust holes 31 are opened around the bottom end of the exhaust ring 3, and a plurality of upper exhaust holes 41 are opened around the top end of the outlet ring 4. The gas is discharged upward through the upper exhaust holes 41 and discharged through the exhaust holes 31 to form an air wall between the exhaust ring 3 and the outlet ring 4. Specifically, the exhaust ring 3 and the outlet ring 4 can be designed to be annular, and the outlet gas is argon, thereby forming a cylindrical argon gas wall. A guide member 5 is movably attached to the liquid outlet 301. The guide member 5 can be made of existing conventional high-temperature resistant solid materials, such as high-melting-point crystals or metal materials such as diamond. Preferably, the guide member 5 can be spherical in shape. A lock buckle 6 is provided at the bottom end of the ladle 300, as shown in FIG. Figure 1 , Figure 2 As shown, the lock buckle 6 is pressed against the bottom end of the gas outlet ring 4 so that the gas outlet ring 4 is fixed closely to the bottom end of the exhaust ring 3. At this time, although the molten steel in the ladle 300 is in contact with the top of the guide piece 5, it is difficult to flow down between the guide piece 5 and the liquid outlet 301, and a sliding switch plate can also be provided at the liquid outlet 301 to control the opening and closing of the liquid outlet 301. By unlocking the lock buckle 6, the gas outlet ring 4 and the guide piece 5 fall freely downward, and the upper gas outlet hole 41 discharges gas upward. During the falling process, the molten steel flows downward along the liquid outlet 301. At this time, the molten steel column is protected by the argon gas wall on the outside and the guide piece 5 at the bottom. Figure 3 As shown, until the outlet ring 4 is clamped in the funnel cavity 200, the guide member 5 is attached to the inner wall of the middle injection tube 100 and continues to slide down. Figure 4 As shown, the guide member 5 blocks the atmosphere in the middle injection pipe 100 from contacting the steel liquid column flow, and pushes the atmosphere in the middle injection pipe 100 to be discharged from the exhaust port 2. The guide member 5 stops when it falls to the bottom end of the middle injection pipe 100. Fig.11 As shown, the vertical slide plate 1 is pushed downward by the guide member 5 so that the middle injection pipe 100 and the cross flow channel 400 are connected through the through port 101. At this time, the guide member 5 is attached to the bottom end of the middle injection pipe 100, so that the molten steel will not flow to the exhaust port 2 in large quantities, but will be injected into the through port 101 along the top of the guide member 5. As a result, the molten steel column flow is no longer directly dropped to the bottom end of the middle injection pipe 100 by gravity to cause slag rolling, but is injected into the through port 101 along the arc-shaped top surface of the guide member 5, which is conducive to stable slow-release column flow, and the through port 101 is stable. Through the protection of the argon gas wall and the guide piece 5, the molten steel column is prevented from being affected by atmospheric oxidation at the open gate and in the center injection pipe 100, and in the process of the molten steel column flowing down, it is always in direct contact with the guide piece 5 instead of the low-temperature gas environment in the center injection pipe 100, so as to prevent the molten steel from forming nodules or being drawn into argon due to temperature drop. There is no need to make a detachable fully sealed structure between the liquid outlet 301 and the top gate of the center injection pipe 100, nor is there any need to evacuate the large space of the center injection pipe 100 or continuously inject argon.

[0021] Among them, since the opening 101 is closed in the initial stage, a small space in the cross-flow channel 400 can be vacuumed, or the air therein can be replaced by injecting argon. Since the cross-flow channel 400 has been preheated during the downstream process of the molten steel, even if the molten steel flows into the cross-flow channel 400 and contacts the argon, it will not cause problems such as temperature drop of the molten steel and nodules.

[0022] Among them, the side end of the exhaust ring 3 can be connected to an exhaust pipe 32, and an external vacuum pump can be connected through the exhaust pipe 32 to strengthen the exhaust. The side end of the outlet ring 4 can be connected to an outlet pipe 42, and an external argon source can be connected through the outlet pipe 42 to provide high-pressure argon gas outlet. The exhaust holes 31 and the upper outlet holes 41 are closely arranged in a ring to form an argon gas wall. Optionally, a slide groove for the outlet pipe 42 to slide down can be opened at the side end of the funnel cavity 200, and a slide bar 201 can be slidably connected to the outside of the funnel cavity 200. The slide bar 201 can be elastically connected to the outside of the funnel cavity 200 to bounce upward and seal the slide groove until the outlet ring 4 falls, and the outlet pipe 42 falls together and pushes the slide bar 201 downward. In addition, as Fig.13 As shown, the air outlet pipe 42 can also be rotatably connected to the side end of the air outlet ring 4 , so that when the air outlet ring 4 falls, the air outlet pipe 42 rotates and is attached to the inner wall of the funnel cavity 200 .

[0023] In an embodiment of the present invention, Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10As shown, a plurality of lower air outlet holes 43 are provided at the bottom end of the air outlet ring 4 for simultaneously discharging air downward; The inner ring of the air outlet ring 4 is rotatably connected to multiple sealing plates 7. When the sealing plates 7 rotate parallel to the air outlet ring 4, the inner ring of the air outlet ring 4 is closed to support the guide piece 5. When the air outlet ring 4 falls until it is clamped in the funnel cavity 200, considering the released gate design, air remains in the funnel cavity 200, and the guide piece 5 pushes the sealing plates 7 downward to rotate the sealing plates 7 downward. At this time, the guide piece 5 is separated from the air outlet ring 4 and has not yet fallen into the tube of the middle pouring tube 100. The exposed molten steel will still contact with the air retained in the funnel cavity 200. Therefore, the lower air outlet holes 43 are used to discharge air downward at the same time during the initial pouring stage, so that the air retained in the funnel cavity 200 can be blown into the middle pouring tube 100, thereby avoiding contact with the steel liquid column flow. There is no need to have a large number of lower air outlet holes 43, and the downward air outlet volume does not need to be large, just enough to blow out the air retained in the funnel cavity 200.

[0024] Among them, in the initial stage of falling, since the air outlet ring 4 mainly discharges air upward, it is also conducive to falling slightly faster than the guide member 5, achieving a better protection effect.

[0025] In an embodiment of the present invention, Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown, the horizontal end face of the sealing plate 7 is designed in a triangular shape, and the triangular base of the sealing plate 7 can be rotatably connected to the inner circle of the air outlet ring 4 by existing conventional means such as hinges. When the sealing plate 7 rotates parallel to the air outlet ring 4, the inner circle of the air outlet ring 4 is closed.

[0026] In an embodiment of the present invention, Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown, the bottom end of the gas outlet ring 4 is slidably connected with a horizontal slide plate 44. When the sealing plate 7 rotates downward, the horizontal slide plate 44 is pushed outward to close the lower gas outlet hole 43 to avoid continuous downward gas outlet and waste of argon.

[0027] In an embodiment of the present invention, Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 As shown, a groove 71 is provided at one end of the sealing plate 7 close to the horizontal slide plate 44, and the concave surface of the groove 71 is designed as an arc-shaped end surface. When the sealing plate 7 rotates downward, the arc-shaped concave surface of the groove 71 pushes the inner end of the horizontal slide plate 44 to push the horizontal slide plate 44 outward.

[0028] In an embodiment of the present invention, Figures 1 to 11 As shown, when the lock buckle 6 is pressed against the bottom end of the outlet ring 4, one end of the lock buckle 6 abuts against the outer end of the horizontal slide plate 44 to prevent the sealing plate 7 from rotating downward. Specifically, the lock buckle 6 can be designed to be L-shaped, and the L-shaped vertical side of the lock buckle 6 is rotatably connected to the bottom end of the ladle 300. By rotating the L-shaped vertical side of the lock buckle 6, as shown in FIG. Figure 2 As shown, the L-shaped horizontal side of the lock buckle 6 is tightly against the bottom end of the air outlet ring 4, and one end of the L-shaped horizontal side of the lock buckle 6 is against the outer end of the horizontal slide plate 44. At this time, the sealing plate 7 cannot be rotated downward, and is used to support the drainage member 5 and maintain the seal. When pouring is required, Figure 3 As shown, the lock buckle 6 can be rotated by holding the long rod until the lock buckle 6 is separated from the air outlet ring 4.

[0029] In an embodiment of the present invention, Fig.12 , Fig.13 As shown, more preferably, the inner diameter of the liquid outlet 301 is designed to be gradually reduced from bottom to top, and a flexible sealing pad 8 is provided at the bottom end of the exhaust ring 3 away from the exhaust hole 31. Specifically, the flexible sealing pad 8 can be made of existing conventional flexible high-temperature resistant materials such as ceramic fiber, and the flexible sealing pad 8 is pressed upward by the outlet ring 4 to make the guide piece 5 press upward against the inner wall of the liquid outlet 301 to seal, thereby achieving a hard sealing effect.

[0030] In an embodiment of the present invention, Fig.10 As shown, the side end of the vertical slide plate 1 is connected to a side platform 9. When the guide member 5 falls to the bottom end of the middle injection tube 100, it pushes the side platform 9 downward, driving the vertical slide plate 1 to move downward.

[0031] Among them, the bottom end of the center injection tube 100 can be designed as a detachable module, which is used to disassemble and remove the drainage piece 5 for easy reuse and to push up the vertical slide plate 1 again. Optionally, the bottom end of the vertical slide plate 1 and the center injection tube 100 can also be designed to be elastically connected, which is used to automatically push up the vertical slide plate 1 to reset. The top of the sealing plate 7 can be designed with a recessed portion that matches the bottom of the drainage piece 5, so as to better support the drainage piece 5.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

Claims

1. A pouring device for smelting mold steel, comprising a center pouring pipe (100), the top of the center pouring pipe (100) is provided with a funnel cavity (200) for docking with a liquid outlet (301) at the bottom of a ladle (300), the bottom of the center pouring pipe (100) is connected with a cross flow channel (400), and the end of the cross flow channel (400) away from the center pouring pipe (100) is provided with a mold bottom port (401) for docking with a steel ingot mold cavity, characterized in that: A through opening (101) communicating with the horizontal flow channel (400) is provided at the bottom side end of the middle injection pipe (100), a vertical slide plate (1) is vertically slidably connected to the through opening (101) for closing the through opening (101), and an exhaust port (2) is provided at the inner bottom end of the middle injection pipe (100); An exhaust ring (3) is fixedly provided at the outer circle of the liquid outlet (301), an air outlet ring (4) is provided below the exhaust ring (3), a plurality of exhaust holes (31) are provided around the bottom end of the exhaust ring (3), and a plurality of upper air outlet holes (41) are provided around the top end of the air outlet ring (4), air is discharged upward through the upper air outlet holes (41) and discharged through the exhaust holes (31), so as to form an air wall between the exhaust ring (3) and the air outlet ring (4); A drainage piece (5) is movably attached to the liquid outlet (301), and a lock buckle (6) is provided at the bottom end of the ladle (300), and the lock buckle (6) is pressed against the bottom end of the gas outlet ring (4) so ​​that the gas outlet ring (4) is tightly attached to the bottom end of the gas exhaust ring (3) and fixed; By unlocking the lock buckle (6), the air outlet ring (4) and the guide piece (5) fall downwards, and at the same time, the upper air outlet hole (41) discharges air upwards until the air outlet ring (4) is snapped into the funnel cavity (200), and the guide piece (5) continues to slide against the inner wall of the middle injection tube (100) until it falls to the bottom end of the middle injection tube (100), and the guide piece (5) pushes the vertical slide plate (1) downwards, so that the middle injection tube (100) and the cross flow channel (400) are connected through the opening (101).

2. A pouring device for mold steel smelting according to claim 1, characterized in that: A plurality of lower air outlet holes (43) are provided at the bottom end of the air outlet ring (4).

3. A pouring device for smelting mold steel according to claim 2, characterized in that: The inner ring of the air outlet ring (4) is rotatably connected to a plurality of sealing plates (7). When the sealing plates (7) rotate parallel to the air outlet ring (4), the inner ring of the air outlet ring (4) is closed to support the flow guide member (5). When the air outlet ring (4) falls until it is engaged in the funnel cavity (200), the flow guide member (5) pushes the sealing plates (7) downward to cause the sealing plates (7) to rotate downward.

4. A pouring device for smelting mold steel according to claim 3, characterized in that: The horizontal end surface of the sealing plate (7) is designed to be triangular in shape.

5. A pouring device for smelting mold steel according to claim 3, characterized in that: The bottom end of the air outlet ring (4) is slidably connected to a transverse slide plate (44). When the sealing plate (7) rotates downward, the transverse slide plate (44) is pushed outward to allow the transverse slide plate (44) to close the lower air outlet hole (43).

6. A pouring device for smelting mold steel according to claim 5, characterized in that: A groove (71) is provided at one end of the sealing plate (7) close to the transverse sliding plate (44), and the concave surface of the groove (71) is designed as an arc-shaped end surface. When the sealing plate (7) rotates downward, the arc-shaped concave surface of the groove (71) pushes the inner end of the transverse sliding plate (44) to push the transverse sliding plate (44) outward.

7. A pouring device for smelting mold steel according to claim 6, characterized in that: When the lock buckle (6) is pressed against the bottom end of the air outlet ring (4), one end of the lock buckle (6) abuts against the outer end of the horizontal sliding plate (44), thereby preventing the sealing plate (7) from rotating downward.

8. A pouring device for smelting mold steel according to claim 1, characterized in that: The inner diameter of the liquid outlet (301) is designed to gradually decrease from bottom to top, and a flexible sealing pad (8) is provided at the bottom end of the exhaust ring (3) away from the exhaust hole (31). The flexible sealing pad (8) is pressed upward by the exhaust ring (4) to enable the guide member (5) to press upward against the inner wall of the liquid outlet (301) to seal.

9. A pouring device for smelting mold steel according to claim 1, characterized in that: The side end of the vertical slide plate (1) is connected to a side platform (9). When the flow guide member (5) falls to the bottom end of the center injection tube (100), it pushes the side platform (9) downward, driving the vertical slide plate (1) to move downward.

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