Casting inoculant adding device

Abstract

The utility model provides a casting inoculant adding device, and belongs to the technical field of casting. The problem that an existing molten iron inoculation treatment effect is poor is solved. The adding device is arranged above the molten iron pouring ladle, the adding device is used for adding the inoculant at a constant speed and a constant quantity in a spiral feeding mode, the inoculant is added at a constant speed through the adding device when molten iron is poured into the pouring ladle, and the inoculant can be fully mixed and melted with the molten iron; by means of the design, the molten iron inoculation treatment effect can be greatly improved. The outer diameter of the blade of the adding device is gradually increased from one side of the inlet to one side of the outlet, and the whole blade is of a cone-like structure, so that when the nucleating agent is guided into the cavity, the feeding speed of the side close to the inlet is high, the extruding speed of the nucleating agent on the side of the outlet is low, and the discharging is uniform; by means of the design, material blocking can be effectively avoided, and meanwhile the inoculation effect of molten iron is improved.

Description

Technical Field

[0001] This utility model belongs to the field of casting technology and relates to an additive device, particularly a casting inoculant additive device. Background Technology

[0002] Inoculation treatment refers to the addition of small amounts of other substances to molten metal during solidification to promote nucleation, inhibit growth, and refine grain size. Inoculation treatment primarily affects nucleation and promotes grain freeing. Untreated gray cast iron has an unstable microstructure, poor mechanical properties, and is prone to white cast iron formation in thin-walled sections. Inoculation treatment is essential to ensure consistent casting quality.

[0003] The current method of adding inoculants mainly involves manual addition. The inoculant is prepared in advance and then added all at once manually when 1 / 4 to 1 / 3 of the molten iron is poured in, utilizing the churning of the molten iron to melt it. The timing of this addition is crucial. Because it's a one-time addition, if the inoculant is added too early, it won't fully dissolve and mix with the molten iron, and the undissolved sediment will easily adhere to the bottom of the ladle. If added too late, the inoculant won't melt easily and won't mix sufficiently with the molten iron, resulting in poor inoculation and affecting product performance. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a casting inoculant addition device. It solves the technical problem of poor inoculation effects in existing molten iron treatment methods.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A casting inoculant adding device includes a frame disposed above a casting ladle, the frame having a cylindrical chamber with an inlet and an outlet at opposite ends along its length, the inlet being located at the top of the chamber and the outlet at the bottom of the chamber, a hopper communicating with the inlet being located above the inlet on the frame, and a guide pipe fixed at the outlet on the frame. The device is characterized in that a circumferentially rotatable shaft is horizontally arranged between the inlet and outlet within the chamber, and blades spirally arranged along the length of the shaft are distributed circumferentially on the shaft. The outer diameter of the blades gradually increases from the side with the inlet to the side with the outlet, and a gap exists between the blades and the inner wall of the chamber, the gap gradually decreasing from the side closer to the inlet to the side with the outlet.

[0007] The application sets an adding device above the molten iron pouring ladle, the adding device adds inoculant at a constant speed through the screw feeding mode, and the inoculant can be fully mixed and melted with the molten iron when the molten iron is poured into the pouring ladle through the adding device, so that the design can greatly improve the inoculation effect of the molten iron.

[0008] The adding device comprises a rotating shaft arranged in the chamber and a blade on the rotating shaft, the outer diameter of the blade gradually increases from the inlet side to the outlet side, so that the distance between the blade and the inner wall of the chamber is large at the inlet side and small at the outlet side, and the blade as a whole has a conical structure, which can accommodate more material at a high feeding speed near the inlet side when the inoculant is introduced into the chamber, and the distance between the blade at the outlet side and the inner wall of the chamber is small, so that the inoculant is slowly extruded, the discharge is uniform and constant, and the design can effectively avoid material jamming and improve the inoculation effect of the molten iron.

[0009] In the above-mentioned casting inoculant adding device, the adding device comprises a servo motor, the servo motor is fixed on the rack, and the output shaft of the servo motor is fixed with the rotating shaft and drives the rotating shaft to rotate.

[0010] The rotating shaft is driven to rotate by the servo motor, the servo motor can drive the rotating shaft to rotate a certain number of times to realize the effect of quantitative feeding, so that the inoculant can be added quantitatively, and the inoculation effect is further improved.

[0011] Meanwhile, the servo motor can control forward rotation or reverse rotation, and if material jamming occurs, the material can be returned by reversing to solve the problem of material jamming, so as to ensure the stable addition of the inoculant and the inoculation effect.

[0012] In the above-mentioned casting inoculant adding device, the servo motor has an output shaft, the axis of the output shaft is arranged in parallel with the axis of the rotating shaft, and the end of the output shaft is eccentrically fixed with the end of the rotating shaft.

[0013] The output shaft of the servo motor is eccentrically connected with the rotating shaft, and of course, in order to avoid interference, the eccentricity is small, and the eccentric design allows the servo motor to drive the rotating shaft to have a translation in the up-down position when rotating, so that the spiral rotation of the blade becomes a spiral motion plus up-down motion, which can make the inoculant feeding more stable and smooth, effectively avoid the phenomenon of material jamming and stacking, and further improve the inoculation effect.

[0014] In the above-mentioned casting inoculant adding device, the other end of the rotating shaft is a free end, and the blade at the end is gap-fitted with the inner wall of the chamber.

[0015] One end of the rotating shaft of the application is fixed with the output shaft of the servo motor, and the other end is in a free state, and the gap between the blade and the inner wall of the chamber is small, so that when the servo motor drives the rotating shaft to rotate, the far end of the rotating shaft can basically keep rotating, and the near end close to the servo motor is the eccentric motion of the rotating shaft, so that the rotation is designed to move in a stirring manner, which can better extrude the inoculant while ensuring that the material is not blocked, the stability of the overall feeding is improved, and the inoculation effect is ensured.

[0016] In the casting inoculant adding device, the blade is a single blade structure of continuous spiral, and the blade is spirally wound along the outer periphery of the rotating shaft.

[0017] The blade of the application is a single blade integrated structure, the inoculant can be guided forward along the spiral blade surface to enter the outlet for extrusion, the feeding is stable, the inoculation effect is good, and meanwhile, the blade moves eccentrically up and down, the strength of the integrated blade is high, the material is not easy to be blocked, and the stability is good.

[0018] In the casting inoculant adding device, the adding device comprises a hopper, the hopper is conical, and the bottom of the hopper has a straight section, the outer diameter of the straight section is close to the inner diameter of the feeding port, and the straight section can be plug-connected with the feeding port.

[0019] The inoculant feeding of the application adopts the hopper feeding mode, the hopper is directly connected with the chamber inlet at the bottom of the hopper, the feeding efficiency can be ensured, and since the outer diameter of the spiral blade of the application gradually increases, the inlet can adapt to rapid feeding without blocking the material.

[0020] In the casting inoculant adding device, the side wall of the hopper has a guide slope for guiding the overflowed inoculant into the feeding port.

[0021] In the casting inoculant adding device, the guide pipe is inclined from top to bottom towards the pouring ladle, and the outlet of the guide pipe is located at the 1 / 3 position of the pouring opening of the pouring ladle.

[0022] The outlet of the guide pipe of the application stays at the one-third position of the pouring opening of the pouring ladle, which can be close to the pouring molten iron flow, can be in contact with the molten iron during pouring, and the fusion is more sufficient, and the inoculation effect is further improved.

[0023] In the casting inoculant adding device, the adding device further comprises a weighing device.

[0024] In the casting inoculant adding device, the adding device further comprises a timer.

[0025] The application has the following beneficial effects:

[0026] 1. This application provides an inoculant device above the molten iron ladle. The inoculant is added at a constant speed and amount by means of a screw feeder. When the molten iron is poured into the ladle, the inoculant is added at a constant speed by this inoculant device, which allows the inoculant to be fully mixed and melted with the molten iron. This design can greatly improve the effect of molten iron inoculation treatment.

[0027] 2. The outer diameter of the blades of this additive device gradually increases from the inlet side to the outlet side, and the blades have a cone-shaped structure. This design allows for faster feeding speed near the inlet side and slower extrusion speed of the inoculant on the outlet side when the inoculant is introduced into the chamber, resulting in uniform discharge. This design can effectively avoid material jamming while improving the inoculation effect of molten iron. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is an enlarged view of the connection position between the servo motor and the rotating shaft of this utility model.

[0030] In the diagram: 1. Frame; 11. Chamber; 12. Feed inlet; 13. Discharge outlet; 14. Hopper; 141. Guide slope; 2. Casting bag; 3. Guide pipe; 4. Rotating shaft; 41. Blade; 42. Spacing; 5. Servo motor; 51. Output shaft; 6. Hopper; 61. Straight section. Detailed Implementation

[0031] like Figure 1 and Figure 2The diagram illustrates a casting inoculant addition device. The casting process includes a ladle and a casting ladle 2. The ladle is used to transfer molten iron, and the casting ladle 2 is used to precipitate and spheroidize the molten iron. This inoculant addition device is fixed above the casting ladle 2 and located on the side opposite to the ladle's material inlet. The device includes a frame 1, a weighing device, and a timer. The weighing device is a precision electronic scale capable of accurately weighing the required amount of inoculant, and the timer is a precision electronic watch capable of accurately timing the material addition. The frame 1 has a material box, inside which is a cylindrical chamber 11. The centerline of the cylindrical chamber 11 is horizontally oriented. At opposite ends of the chamber 11 are an inlet 12 and an outlet 13, respectively. The inlet 12 is located at the top of the chamber 11, and the outlet 13 is located at the bottom. Above the inlet 12 on the frame 1 is a hopper 14 communicating with the inlet 12; the hopper 14 is part of the material box. A guide pipe 3 is fixed on the frame 1 at the discharge port 13. A rotating shaft 4, capable of circumferential rotation, is horizontally arranged between the inlet 12 and the discharge port 13 within the chamber 11. Blades 41, spirally arranged along the length of the shaft 4, are distributed around the circumference of the shaft 4. The outer diameter of the blades 41 gradually increases from the side near the inlet 12 to the side near the discharge port 13. A gap 42 exists between the blades 41 and the inner wall of the chamber 11, gradually decreasing from the side near the inlet 12 to the side near the discharge port 13. This application provides an adding device above the molten iron ladle 2. The adding device adds inoculant at a constant speed and amount via a screw feeder. When molten iron is poured into the ladle 2, the inoculant is added at a constant speed through this adding device, allowing the inoculant to fully mix and melt with the molten iron. This design significantly improves the effect of molten iron inoculation treatment. The addition device of this application includes a rotating shaft 4 and blades 41 disposed in the chamber 11. The outer diameter of the blades 41 gradually increases from the inlet side to the outlet side, resulting in a large distance 42 between the blades 41 and the inner wall of the chamber 11 on the inlet side and a small distance 42 between the blades 41 and the inner wall of the chamber 11 on the outlet side. The blades 41 have a cone-like structure. This design allows for a larger material intake and faster feeding speed on the inoculant side when it is introduced into the chamber 11, reducing the likelihood of material jamming. On the outlet side, the small distance 42 between the blades 41 and the inner wall of the chamber 11 results in a slower extrusion speed of the inoculant, leading to uniform and constant output. This design effectively avoids material jamming while improving the inoculation effect of molten iron.

[0032] Furthermore, this addition device includes a servo motor 5, which is fixed on the frame 1. The output shaft 51 of the servo motor 5 is fixed to the rotating shaft 4 and drives the rotating shaft 4 to rotate via the servo motor 5. The rotating shaft 4 in this application is driven to rotate by the servo motor 5, which can drive the rotating shaft 4 to rotate a fixed number of revolutions to achieve a quantitative addition effect. This allows for precise quantitative addition of the inoculant, further improving the inoculation effect. Simultaneously, the servo motor 5 can control forward or reverse rotation. If material jamming occurs, it can be reversed to unload the material, resolving the jamming problem and ensuring stable addition of the inoculant, thus guaranteeing the inoculation effect. The axis of the output shaft 51 of the servo motor 5 is parallel to the axis of the rotating shaft 4, and the end of the output shaft 51 is eccentrically fixed to the end of the rotating shaft 4. In this application, the output shaft 51 of the servo motor 5 is eccentrically connected to the rotating shaft 4. Of course, in order to avoid interference, the eccentricity is small. The eccentric design allows the servo motor 5 to drive the rotating shaft 4 to have a translational motion in the up and down position when rotating. This makes the spiral rotation of the blade 41 a spiral plus up and down motion, which makes the inoculant addition more stable and smooth, effectively avoids the phenomenon of material jamming and accumulation, and further improves the inoculant effect.

[0033] Furthermore, the other end of the rotating shaft 4 is a free end, and the blade 41 on this end is in clearance fit with the inner wall of the chamber 11. In this application, one end of the rotating shaft 4 is fixed to the output shaft 51 of the servo motor 5, while the other end is in a free state. The gap between the blade 41 and the inner wall of the chamber 11 is small. In this way, when the servo motor 5 drives the rotating shaft 4 to rotate, the far end of the rotating shaft 4 can basically maintain rotation, while the near end of the rotating shaft 4 near the servo motor 5 has eccentric motion. This design allows the rotation to move in a stirring-like manner, which can better squeeze out the inoculant while ensuring that the material does not jam. The overall stability of feeding is improved, ensuring the inoculation effect.

[0034] Furthermore, the blade 41 is a continuous spiral single-blade structure, with the blade 41 spirally coiled around the outer circumference of the rotating shaft 4. The blade 41 of this application is an integral structure of a single blade 41, allowing the inoculant to be guided along the surface of the spiral blade 41 and extruded through the outlet, resulting in stable dispensing and good inoculum effect. Simultaneously, the blade 41 undergoes eccentric up-and-down movement; the integral blade 41 has high strength, is less prone to jamming, and exhibits good stability.

[0035] Furthermore, this addition device includes a hopper 6, which is conical and has a straight section 61 at its bottom. The outer diameter of the straight section 61 is similar to the inner diameter of the inlet 12, and the straight section 61 can be inserted and removed from the inlet 12. The inoculant is fed using the hopper 6, which is directly connected to the inlet of the chamber 11 at the bottom of the silo 14, ensuring feeding efficiency. Simultaneously, because the outer diameter of the spiral blades 41 gradually increases, the inlet can accommodate rapid feeding without jamming. A guide ramp 141 is provided on the side wall of the silo 14 to guide overflowing inoculant into the inlet 12. Inoculant overflowing from the straight section 61 of the hopper 6 can be guided back into the inlet.

[0036] Furthermore, the guide pipe 3 is inclined from top to bottom towards the casting ladle 2, and the outlet of the guide pipe 3 is located at 1 / 3 of the pouring opening of the molten iron on the casting ladle 2. In this application, the outlet of the guide pipe 3 stops at one-third of the pouring opening of the casting ladle 2, which allows it to be close to the pouring molten iron flow and to come into contact with the molten iron during the pouring process, resulting in more thorough fusion and further improving the inoculation effect.

[0037] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. At the same time, the basic principles, main features, and advantages of this utility model have been shown and described above, which should be understood by those skilled in the art.

Claims

1. A foundry inoculant adding device, comprising a frame (1) arranged above a pouring ladle (2), the frame (1) having a cylindrical-shaped cavity (11) on it, opposite ends of the cavity (11) in its length direction having a feeding port (12) and a discharging port (13) respectively, the feeding port (12) being located at the top of the cavity (11), the discharging port (13) being located at the bottom of the cavity (11), the frame (1) having a hopper (14) communicating with the feeding port (12) above the feeding port (12), a flow guide pipe (3) being fixed to the frame (1) at the discharging port (13), characterized in that, The rotating shaft (4) is horizontally arranged in the chamber (11) between the feeding port (12) and the discharging port (13), and the rotating shaft (4) is circumferentially provided with blades (41) spirally arranged along the length direction of the rotating shaft (4), the outer diameter of the blade (41) gradually increases from the side where the feeding port (12) is located to the side where the discharging port (13) is located, and the blade (41) has a gap (42) with the inner wall of the chamber (11), and the gap (42) gradually decreases from the side close to the feeding port (12) to the side close to the discharging port (13).

2. A foundry inoculant adding device according to claim 1, wherein The adding device comprises a servo motor (5) fixed on the rack (1), and the output shaft (51) of the servo motor (5) is fixed with the rotating shaft (4) and drives the rotating shaft (4) to rotate through the servo motor (5).

3. A foundry inoculant adding device according to claim 2, wherein The servo motor (5) has an output shaft (51), and the axis of the output shaft (51) is parallel to the axis of the rotating shaft (4), and the end of the output shaft (51) is eccentrically fixed with the end of the rotating shaft (4).

4. A foundry inoculant adding device according to claim 3, wherein The other end of the rotating shaft (4) is a free end, and the blade (41) on the end is gap-fitted with the inner wall of the chamber (11).

5. A foundry inoculant adding device according to claim 4, wherein The blade (41) is a continuous spiral single blade (41) structure, and the blade (41) is spirally wound along the outer periphery of the rotating shaft (4).

6. A foundry inoculant adding device according to any one of claims 1 to 5, characterized in that The adding device comprises a hopper (6), the hopper (6) is conical, and the bottom of the hopper (6) has a straight section (61), the outer diameter of the straight section (61) is close to the inner diameter of the feeding port (12), and the straight section (61) is plug-fitted with the feeding port (12).

7. A foundry inoculant adding device according to claim 6, wherein The sidewall of the hopper (14) has a guide slope (141) for guiding the overflowed inoculant into the feeding port (12).

8. A foundry inoculant applicator according to any one of claims 1 to 5, wherein, The guide pipe (3) is inclined from top to bottom towards the pouring bag (2), and the outlet of the guide pipe (3) is located at the 1 / 3 position of the molten iron pouring port on the pouring bag (2).

9. A foundry inoculant applicator according to any one of claims 1 to 5, wherein, The adding device further comprises a weighing device.

10. A foundry inoculant adding device according to any one of claims 1 to 5, characterized in that The adding device further comprises a timer.

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