Stopper rod opening and closing control device of bottom pouring type casting machine

Abstract

The invention discloses a stopper rod opening and closing control device of a bottom pouring type casting machine. The casting machine comprises a casting ladle, the casting ladle is used for containing molten metal, a stopper rod is slidably connected into the casting ladle, the lower end of the stopper rod can block a pouring gate at the bottom of the casting ladle, the upper end of the stopper rod is exposed out of the top face of the casting ladle, and the stopper rod comprises a stopper rod guide part and a driving mechanism; the stopper guide part comprises a guide shaft, a cantilever rod, a pressing rod, a U-shaped seat, a supporting bearing and a supporting rod; the guide shaft is vertically slidably connected to the outer wall of the casting ladle. One end of the cantilever rod is fixed with the upper end of the guide shaft, and the other end is fixed with the upper end of the stopper rod; the U-shaped seat is fixed at one end of the pressing rod; the end face of the supporting bearing abuts against the inner wall of the U-shaped base, the inner ring of the supporting bearing is fixed to the U-shaped base, and the outer ring of the supporting bearing is embedded in a limiting groove in the guide shaft. One end of the supporting rod is fixed with the outer wall of the casting ladle, and the other end is hinged with the middle of the pressing rod; the driving mechanism is in transmission connection with one end of the pressing rod away from the U-shaped seat. The control efficiency can be effectively improved, and the service life of a driving part can be guaranteed.

Description

Technical Field

[0001] This invention relates to the field of melting casting equipment technology, and more specifically to a stopper rod opening and closing control device for a bottom-pouring casting machine. Background Technology

[0002] A casting pouring machine is an automated device used to transfer molten metal from a smelting furnace or holding furnace and precisely inject it into a casting mold. Bottom-pouring pouring machines, in particular, have molten metal flowing from the bottom of the ladle through a gate. The gate's opening and closing is controlled by the raising and lowering of a stopper rod, thus regulating the flow rate of the molten metal. Traditional manual stopper rod opening and closing mechanisms are operated by levers, handwheels, or screw mechanisms. Workers manually adjust the stopper rod position, which relies heavily on worker experience, resulting in low precision and poor safety (requiring close-range operation).

[0003] By adding a drive motor, the stopper bar can be moved up and down via a motor, gear rack, or worm gear transmission, thus achieving automatic opening and closing control of the stopper bar and improving control efficiency. However, gear / worm gear transmissions have mechanical backlash, and lubrication failure at high temperatures can cause jamming, easily leading to opening and closing delays, resulting in significant casting weight errors or other casting risks. Furthermore, the ladle needs to be dried before filling with molten steel. Prolonged exposure to high temperatures can affect the performance, lifespan, and reliability of the motor and other drive components, easily causing equipment failure in the casting machine and the risk of steel leakage. Moreover, the casting machine needs to be moved to different workstations for casting, requiring the movement of the drive motor cables to avoid the risk of cable burn-out.

[0004] Therefore, how to provide a safer and more efficient automatic control device for stoppers is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a stopper rod opening and closing control device for a bottom-pouring casting machine, which can effectively improve control efficiency and ensure the life of the drive components.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A stopper rod opening and closing control device for a bottom-pouring casting machine. The casting machine includes a ladle 1 for holding molten metal. A stopper rod 13 is slidably connected inside the ladle 1. The lower end of the stopper rod 13 can block the gate at the bottom of the ladle 1, and the upper end is exposed above the top surface of the ladle 1. The device includes: A ladle is used to hold molten metal. A stopper rod is slidably connected inside the ladle. The lower end of the stopper rod can block the gate at the bottom of the ladle, and the upper end is exposed on the top surface of the ladle. A stopper rod guide includes a guide shaft, a cantilever rod, a pressure rod, a U-shaped seat, a support bearing, and a support rod. The guide shaft is slidably connected to the outer wall of the ladle. One end of the cantilever rod is fixed to the upper end of the guide shaft, and the other end is fixed to the upper end of the stopper rod. The U-shaped seat is fixed to one end of the pressure rod. The end face of the support bearing abuts against the inner wall of the U-shaped seat, and its inner ring is fixed to the U-shaped seat, while its outer ring is embedded in a limiting groove on the guide shaft. One end of the support rod is fixed to the outer wall of the ladle, and the other end is hinged to the middle of the pressure rod. A drive mechanism is provided, wherein the end of the pressure rod away from the U-shaped seat is connected to drive the pressure rod to swing up and down around the hinge point between the pressure rod and the support rod, thereby causing the guide shaft to drive the stopper rod to move up and down.

[0007] The beneficial effects of this invention are as follows: A support rod supports the pressure rod, and a drive mechanism drives the pressure rod. The inner ring of the support bearing rotates relative to the outer ring. Under the force of the support bearing, the pressure rod can swing up and down around the hinge point with the support rod. During this swinging motion, it drives the guide shaft to move up and down. With the connection of the cantilever rod, the stopper rod and the guide shaft move up and down synchronously, thus opening the gate for pouring. By controlling the output force of the drive mechanism, the gap between the stopper rod and the gate can be adjusted, thereby controlling the flow rate of the molten metal. This invention uses a support bearing installed in a limiting groove. Utilizing the cooperation between the inner and outer rings of the support bearing, and based on the lever principle, the up-and-down swinging of the pressure rod enables the support bearing to drive the guide shaft to move up and down, providing a certain degree of flexibility and smoother guide shaft movement, avoiding errors in the lifting stroke caused by hard friction.

[0008] Preferably, an upper guide block and a lower guide block are fixedly spaced apart on the outer wall of the ladle. The upper guide block has an upper guide groove, and the lower guide block has a lower guide groove. The guide shaft passes through the upper guide groove and the lower guide groove. The upper and lower guide blocks are used to install the guide shaft on the outer wall of the ladle, ensuring the perpendicularity of the guide shaft.

[0009] Preferably, the support rod is an L-shaped rod, one end of which is hinged to the pressure rod via a pin, and the other end is fixed to a support block; the support block is embedded in the lower guide groove and has a through hole for the guide shaft to pass through. The L-shaped support rod ensures that the pressure rod can swing up and down around the hinge center with the support rod.

[0010] Preferably, the driving mechanism includes a body, a servo cylinder, a track plate, a docking cylinder, and a connecting seat. The fixed end of the servo cylinder is installed on the inner top wall of the body, and the telescopic end extends along the bottom wall of the body. The track plate is fixed to the inner side wall of the body, and a waist-shaped groove is formed on the surface of the track plate. The docking cylinder is located inside the body, and its lead screw can pass through the side wall of the body and sleeve the pressure rod. The connecting seat is slidably connected in the waist-shaped groove, and the side wall of the connecting seat is fixed to the cylinder body of the docking cylinder, while the top wall is fixed to the telescopic end rod of the servo cylinder. The telescopic end of the servo cylinder is connected to the cylinder body of the docking cylinder through the connecting seat, which can slide in the waist-shaped groove. The docking cylinder sleeves the pressure rod, and the docking cylinder is equivalent to the force-applying rod of the pressure rod. The telescopic movement of the servo cylinder drives the docking cylinder to move up and down along the waist-shaped groove, thereby realizing the up and down swing of the pressure rod around the hinge point with the support rod, thus realizing the up and down movement of the guide shaft to control the opening and closing of the gate. By controlling the docking between the servo electric cylinder and the docking electric cylinder, the high temperature effect caused by integrating the drive mechanism into the ladle is avoided, ensuring the operating accuracy and life of the drive mechanism. At the same time, the influence of the drive cable on the equipment operation is avoided, and there is no need to plan the cable avoidance trajectory separately.

[0011] Preferably, it further includes a cam bearing and a limiting ring; the cam bearing is fixed to the side wall of the connecting seat away from the docking electric cylinder and located within the waist-shaped groove; the end face of the limiting ring slides against the side surface of the track plate away from the connecting seat, and the limiting ring is securely connected to the cam bearing. The cam bearing is fixed to the connecting seat, and the limiting ring restricts the cam bearing within the waist-shaped groove, ensuring that the cam bearing runs along the trajectory of the waist-shaped groove.

[0012] Preferably, a mounting bracket is fixed to the inner top wall of the machine body, and the fixed end of the servo electric cylinder is fixed to the mounting bracket by a pin. The mounting bracket enables the servo electric cylinder to be installed in the machine body.

[0013] Preferably, a connecting rod is fixed to the end of the cantilever rod away from the guide shaft, and the axis of the connecting rod is arranged perpendicular to the bearing of the cantilever rod; the upper end of the stopper rod is fixed to the connecting rod. Installing the stopper rod via the connecting rod facilitates cleaning and replacement of the stopper rod.

[0014] Preferably, two flanges are fixed on the lower end of the guide shaft, and the limiting groove is formed between the two opposing surfaces of the flanges; the outer ring of the support bearing is fixed to the two opposing surfaces of the two flanges. The support bearing is confined between the two flanges, and the up-and-down swing of the pressure rod can cause the outer ring of the support bearing to drive the guide shaft to move up and down.

[0015] Preferably, a gate brick is fixed to the bottom surface of the ladle, and the gate brick is provided with the gate.

[0016] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a stopper rod opening and closing control device for a bottom-pouring casting machine. By installing a support bearing in a limiting groove, the up-and-down swing of the pressure rod causes the support bearing to drive the guide shaft to move up and down. The guide shaft is connected to the stopper rod through a cantilever rod. The up-and-down movement of the guide shaft can drive the stopper rod to move up and down, thereby controlling the opening and closing of the gate. It has a certain degree of flexibility, and the lifting and lowering of the guide shaft is smoother, avoiding the lifting stroke error caused by hard friction. The swing of the pressure rod adopts docking control, which does not require cable connection to the drive mechanism, avoiding the influence of cables on the operation of the equipment, and eliminating the need to plan the cable avoidance trajectory separately. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0018] Figure 1 A cross-sectional view of the control device provided by the present invention; Figure 2 This is a schematic diagram of the ladle structure provided by the present invention; Figure 3 for Figure 2 Enlarged diagram of part A in the diagram; Figure 4 This is a cross-sectional view of the ladle provided by the present invention; Figure 5 This is a front view of the pressure bar provided by the present invention; Figure 6 A cross-sectional view of the drive mechanism provided by the present invention; Figure 7 A front view of the drive electric cylinder provided by the present invention; Figure 8 for Figure 7 Enlarged schematic diagram of part B in the diagram.

[0019] Among them, 1-pouring ladle; 11-lower guide block; 12-pouring brick; 13-stopper rod; 14-connecting rod; 15-upper guide block; 2-stopper rod guide part; 21-guide shaft; 22-cantilever rod; 23-support rod; 24-pressure rod; 25-U-shaped seat; 26-support bearing; 27-flange; 28-limiting groove; 29-support block; 3-drive mechanism; 31-body; 32-mounting bracket; 33-servo electric cylinder; 34-connecting seat; 35-cam bearing; 36-docking electric cylinder; 37-track plate; 38-waist-shaped groove; 39-limiting ring. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figure 1 As shown in Figure 8, a stopper rod opening and closing control device for a bottom-pouring casting machine according to an embodiment of the present invention is provided. The casting machine includes a ladle 1 for holding molten metal. A gate brick 12 is fixed to the bottom surface of the ladle 1, and a gate is provided on the gate brick 12. A stopper rod 13 is slidably connected inside the ladle 1. The lower end of the stopper rod 13 can block the gate at the bottom of the ladle 1, and the upper end is exposed on the top surface of the ladle 1. The stopper rod includes a stopper rod guide 2 and a drive mechanism 3. The stopper rod 13 is perpendicular to the gate brick 12. Under normal circumstances, the stopper rod 13 blocks the gate brick 12. When a casting operation is required, the stopper rod 13 moves upward to open a gap between itself and the gate brick 12, and the molten metal flows out from the gap. In the pouring process, the opening and closing degree of the gating is controlled by adjusting the gap between the stopper rod 13 and the gating brick 12, thereby controlling the flow rate of the molten metal. The stopper rod guide 2 includes a guide shaft 21, a cantilever rod 22, a pressure rod 24, a U-shaped seat 25, a support bearing 26, and a support rod 23. The guide shaft 21 is slidably connected to the outer wall of the ladle 1. One end of the cantilever rod 22 is fixed to the upper end of the guide shaft 21, and the other end is fixed to the upper end of the stopper rod 13. The U-shaped seat 25 is fixed to one end of the pressure rod 24. The end face of the support bearing 26 abuts against the inner wall of the U-shaped seat 25, and its inner ring is fixed to the U-shaped seat 25, while its outer ring is embedded in the limiting groove 28 on the guide shaft 21. Figure 5 As shown, both sides of the U-shaped seat 25 are provided with support bearings 26. The pressure rod 24 and the guide shaft 21 are engaged by the cooperation of the T-shaped seat 25 and the limiting groove 28. The U-shaped seat 25 can swing up and down relative to the guide shaft 21 by the inner ring of the support bearing 26. One end of the support rod 23 is fixed to the outer wall of the ladle 1, and the other end is hinged to the middle of the pressure rod 24. Using the lever principle, the hinge center between the support rod 23 and the pressure rod 24 is the pivot. The up and down swing of the pressure rod 24 can pry the guide shaft 21 to move up and down, thereby realizing the opening and closing control of the gate by the stopper rod 13. The drive mechanism 3 is connected to the end of the pressure rod 24 away from the U-shaped seat 25 to drive the pressure rod 24 to swing up and down around the hinge point with the support rod 23, so that the guide shaft 21 drives the stopper rod 13 to move up and down.

[0022] In this embodiment, the drive mechanism 3 includes a body 31, a servo cylinder 33, a track plate 37, a docking cylinder 36, and a connecting seat 34. The fixed end of the servo cylinder 33 is installed on the inner top wall of the body 31, and the telescopic end extends along the bottom wall of the body 31. The track plate 37 is fixed on the inner side wall of the body 31, and a waist-shaped groove 38 is provided on the surface of the track plate 37. The docking cylinder 36 is located inside the body 31, and its lead screw can pass through the side wall of the body 31 and is fitted with a pressure rod 24. The connecting seat 34 is slidably connected in the waist-shaped groove 38, and the side wall of the connecting seat 34 is fixed to the cylinder body of the docking cylinder 36, and the top wall is fixed to the telescopic end rod of the servo cylinder 33.

[0023] like Figure 6 , 7 As shown in Figure 8, the docking electric cylinder and the servo electric cylinder are connected by a connecting seat, which can slide along the waist-shaped groove on the track plate. When a pouring operation is required, the lead screw of the docking electric cylinder extends and sleeves the end of the pressure rod away from the U-shaped seat, and the axis of the docking electric cylinder coincides with the axis of the pressure rod. The docking electric cylinder acts as an extension rod of the pressure rod, and the connecting seat is the force application point. The docking electric cylinder is driven to swing up and down by the extension and retraction of the servo electric cylinder. According to the lever principle, it can drive the hinge point between the pressure rod and the support rod to swing up and down.

[0024] To further optimize the above technical solution, a cam bearing 35 and a limiting ring 39 are also included; the cam bearing 35 is fixed on the side wall of the connecting seat 34 away from the docking electric cylinder 36 and located in the waist-shaped groove 38; the end face of the limiting ring 39 slides against the side plate surface of the track plate 37 away from the connecting seat 34, and the limiting ring 39 is connected to the cam bearing 35 by screws.

[0025] The connecting seat and the limiting ring are located on both sides of the track plate. The cam bearing and the limiting ring are connected to the connecting seat by screws. At the same time, the limiting ring and the screws restrict the cam bearing in the waist-shaped groove, so that the cam bearing can move up and down in the waist-shaped groove.

[0026] To further optimize the above technical solution and facilitate the installation of the servo electric cylinder, a mounting bracket 32 ​​is fixed to the inner top wall of the body 31, and the fixed end of the servo electric cylinder 33 is fixed to the mounting bracket 32 ​​by a pin.

[0027] In some other specific embodiments, to facilitate the installation of the guide shaft on the outer wall of the ladle, an upper guide block 15 and a lower guide block 11 are fixedly fixed at intervals on the outer wall of the ladle 1. An upper guide groove is provided on the upper guide block 15, and a lower guide groove is provided on the lower guide block 11. The guide shaft 21 passes through the upper guide groove and the lower guide groove, and the shaft of the guide shaft 21 slides against the groove walls of the upper guide groove and the lower guide groove.

[0028] To further optimize the above technical solution, the support rod 23 is an L-shaped rod, one end of which is hinged to the pressure rod 24 by a pin, and the other end is fixed with a support block 29; the support block 29 is embedded in the lower guide groove and a through hole is opened on the support block 29 for the guide shaft 21 to pass through.

[0029] like Figure 3 and 4 As shown, the L-shaped support rod ensures effective support for the pressure rod and allows it to swing up and down around the hinge point. The lower end of the guide shaft passes through a through hole in the support block, and a limit nut is provided at the lower end of the guide shaft. The upper end is fastened to the cantilever rod by the nut. The axis of the guide shaft is parallel to the axis of the stopper rod and perpendicular to the axis of the cantilever rod. The cantilever rod connects the guide shaft and the stopper rod, enabling synchronous movement of the guide shaft and the stopper rod.

[0030] In some other specific embodiments, to facilitate the cleaning of the cantilever 22, a connecting rod 14 is fixed to the end of the cantilever 22 away from the guide shaft 21, and the axis of the connecting rod 14 is arranged perpendicular to the bearing of the cantilever 22; the upper end of the stopper rod 13 is fixed to the connecting rod 14.

[0031] like Figure 4 As shown, the stopper rod has a hollow structure. The connecting rod is inserted into the inner cavity of the stopper rod, and the upper end of the connecting rod is fastened to one end of the cantilever rod by a nut. The upper end of the stopper rod is connected to the connecting rod by a nut. This connection method facilitates the disassembly of the stopper rod.

[0032] To further optimize the above technical solution, two flanges 27 are fixed on the lower end shaft of the guide shaft 21, and a limiting groove 28 is formed between the two opposing surfaces of the flanges 27; the outer ring of the support bearing 26 is fixed to the two opposing surfaces of the two flanges 27.

[0033] The control device provided in this embodiment operates as follows: After the ladle system is in place, the docking electric cylinder extends, and the piston rod of the docking electric cylinder is fitted with the pressure rod to complete the docking operation. When pouring is required, the telescopic end of the servo electric cylinder moves downward, pushing the connecting seat to slide along the waist-shaped groove, causing the docking electric cylinder to swing downward along the hinge center of the pressure rod and the support rod. The pressure rod swings downward synchronously with the docking electric cylinder, and the connecting seat and the support bearing drive the guide shaft to move upward. The guide shaft drives the stopper rod to move upward synchronously through the cantilever rod, thereby creating a gap between the stopper rod and the gate brick, from which the molten metal flows out for pouring. After pouring is completed, the telescopic end of the servo electric cylinder moves upward, simultaneously driving the docking electric cylinder to swing upward along the hinge center of the pressure rod and the support rod. The pressure rod swings upward synchronously with the docking electric cylinder, and the connecting seat and the support bearing drive the guide shaft to move downward. The guide shaft drives the stopper rod to move downward synchronously through the cantilever rod, thereby gradually reducing the gap between the stopper rod and the gate brick until it closes.

[0034] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stopper rod opening and closing control device for a bottom-pouring casting machine, the casting machine including a ladle (1), the ladle (1) being used to hold molten metal, a stopper rod (13) being slidably connected inside the ladle (1), the lower end of the stopper rod (13) being able to block the gate at the bottom of the ladle (1), and the upper end being exposed above the top surface of the ladle (1), characterized in that, include: The stopper rod guide (2) includes a guide shaft (21), a cantilever rod (22), a pressure rod (24), a U-shaped seat (25), a support bearing (26), and a support rod (23). The guide shaft (21) is slidably connected to the outer wall of the ladle (1). One end of the cantilever rod (22) is fixed to the upper end of the guide shaft (21), and the other end is fixed to the upper end of the stopper rod (13). The U-shaped seat (25) is fixed to one end of the pressure rod (24). The end face of the support bearing (26) abuts against the inner wall of the U-shaped seat (25), and its inner ring is fixed to the U-shaped seat (25), while its outer ring is embedded in the limiting groove (28) on the guide shaft (21). One end of the support rod (23) is fixed to the outer wall of the ladle (1), and the other end is hinged to the middle of the pressure rod (24). The drive mechanism (3) is connected to the end of the pressure rod (24) away from the U-shaped seat (25) to drive the pressure rod (24) to swing up and down around its hinge point with the support rod (23), so that the guide shaft (21) drives the stopper rod (13) to move up and down.

2. The stopper rod opening and closing control device for a bottom-pouring casting machine according to claim 1, characterized in that, The outer wall of the ladle (1) is fixed with an upper guide block (15) and a lower guide block (11) at intervals. The upper guide block (15) has an upper guide groove, and the lower guide block (11) has a lower guide groove. The guide shaft (21) passes through the upper guide groove and the lower guide groove.

3. The stopper rod opening and closing control device for a bottom-pouring casting machine according to claim 2, characterized in that, The support rod (23) is an L-shaped rod, one end of which is hinged to the pressure rod (24) by a pin, and the other end is fixed with a support block (29); the support block (29) is embedded in the lower guide groove and a through hole is provided on the support block (29) for the guide shaft (21) to pass through.

4. The stopper rod opening and closing control device for a bottom-pouring casting machine according to claim 1, characterized in that, The drive mechanism (3) includes a body (31), a servo cylinder (33), a track plate (37), a docking cylinder (36), and a connecting seat (34). The fixed end of the servo cylinder (33) is installed on the inner top wall of the body (31), and the telescopic end extends along the bottom wall of the body (31). The track plate (37) is fixed on the inner side wall of the body (31), and a waist-shaped groove (38) is provided on the plate surface of the track plate (37). The docking cylinder (36) is located inside the body (31), and its lead screw can pass through the side wall of the body (31) and be fitted with the pressure rod (24). The connecting seat (34) is slidably connected in the waist-shaped groove (38), and the side wall of the connecting seat (34) is fixed to the cylinder body of the docking cylinder (36), and the top wall is fixed to the telescopic end rod of the servo cylinder (33).

5. The stopper rod opening and closing control device for a bottom-pouring casting machine according to claim 4, characterized in that, It also includes a cam bearing (35) and a limiting ring (39); the cam bearing (35) is fixed to the side wall of the connecting seat (34) away from the docking electric cylinder (36) and located in the waist-shaped groove (38); the end face of the limiting ring (39) slides against the side plate of the track plate (37) away from the connecting seat (34), and the limiting ring (39) is fastened to the cam bearing (35).

6. The stopper rod opening and closing control device for a bottom-pouring casting machine according to claim 4, characterized in that, The inner top wall of the body (31) is fixed with a mounting bracket (32), and the fixed end of the servo electric cylinder (33) is fixed on the mounting bracket (32) by a pin.

7. The stopper rod opening and closing control device for a bottom-pouring casting machine according to claim 1, characterized in that, A connecting rod (14) is fixed to one end of the cantilever rod (22) away from the guide shaft (21), and the axis of the connecting rod (14) is arranged perpendicular to the bearing of the cantilever rod (22); the upper end of the stopper rod (13) is fixed to the connecting rod (14).

8. The stopper rod opening and closing control device for a bottom-pouring casting machine according to claim 1, characterized in that, Two flanges (27) are fixed on the lower end shaft of the guide shaft (21), and the limiting groove (28) is formed between the two opposite surfaces of the flanges (27); the outer ring of the support bearing (26) is fixed to the two opposite surfaces of the two flanges (27).

9. The stopper rod opening and closing control device for a bottom-pouring casting machine according to claim 1, characterized in that, The bottom surface of the ladle (1) is fixed with a gate brick (12), and the gate is provided on the gate brick (12).

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