A method for crushing graphite crucible lining for large medium frequency melting furnace

Abstract

The present invention discloses a method for crushing the lining of a graphite crucible used in a large medium-frequency smelting furnace. This method belongs to the field of graphite crucible recycling and includes a main support, a lift frame disposed below the main support, a horizontal rotating arm rotatably connected to the bottom of the lift frame, and a rotary drive device disposed on one side of the lift frame, which drives the horizontal rotating arm to rotate at the bottom of the lift frame. The middle of the horizontal rotating arm is rotatably connected to the bottom of the lift frame, and the horizontal rotating arm is provided with a support arm that can be adjusted at both ends. A rotatable vertical drill bit is disposed at the bottom of the support arm away from the horizontal rotating arm. The present invention can automatically and quickly crush the outer lining of a large graphite crucible, reducing labor intensity and allowing graphite rings to be replaced, thereby reducing usage costs.

Description

Technical Field

[0001] The invention relates to the field of graphite crucible recycling, and in particular to a method for crushing a graphite crucible lining for a large medium-frequency smelting furnace. Background Art

[0002] If a large medium frequency melting furnace uses a graphite crucible to melt non-ferrous metals, due to the large size of the crucible, the graphite crucible often needs to be assembled from multiple graphite rings.

[0003] When a large graphite crucible is melted, the molten metal will continuously flush the graphite crucible. Due to the different flushing conditions at different heights, the service life of components at different positions of the graphite crucible is different. Since the graphite crucible is expensive, the undamaged parts can be recycled, and only the damaged graphite rings need to be replaced.

[0004] However, the furnace lining between the graphite crucible and the coil will adhere to the outer wall of the graphite crucible. In order to remove the damaged graphite ring, the furnace lining must be removed first. The removal of the furnace lining around large graphite crucibles is currently a manual operation, which is very labor-intensive, and the space is small, and the operation process has high safety risks.

[0005] In view of the above problems, the present invention designs and manufactures a method for crushing the lining of a graphite crucible for a large medium frequency melting furnace to overcome the above defects. Summary of the Invention

[0006] In order to solve the problems existing in the prior art, the present invention provides a method for crushing the lining of a graphite crucible for a large medium-frequency melting furnace, which can realize the automatic and rapid crushing of the outer lining of a large graphite crucible, reduce labor intensity, and enable the replacement of graphite rings, thereby reducing the cost of use.

[0007] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is as follows: a method for crushing a graphite crucible lining for a large medium frequency melting furnace, which is implemented by a graphite crucible lining crushing mechanism for a large medium frequency melting furnace, wherein the graphite crucible lining crushing mechanism for a large medium frequency melting furnace comprises a main support, a lifting frame that can be raised and lowered is provided below the main support, a horizontal rotating arm is rotatably connected to the bottom of the lifting frame, and a rotary drive device is provided on one side of the lifting frame, and the rotary drive device can drive the horizontal rotating arm to rotate at the bottom of the lifting frame;

[0008] The middle position of the horizontal rotating arm is rotatably connected to the bottom of the lifting frame. The two ends of the horizontal rotating arm are provided with support arms that can be adjusted in position. The bottom of the support arm away from the horizontal rotating arm is provided with a rotatable vertical drill bit. The crushing process is to use the rotating vertical drill bit to feed along the circumferential direction of the furnace lining;

[0009] The specific steps are as follows:

[0010] S1. First adjust the distance between the two vertical drill bits so that the distance between the two vertical drill bits is equal to the diameter of the graphite crucible lining;

[0011] S2. Fix the position of the two arms on the horizontal rotating arm;

[0012] S3. The lifting frame drives the horizontal rotating arm downward until the two vertical drill bits contact the upper end surface of the furnace lining;

[0013] S4. The vertical drill bit begins to rotate, and the rotary drive device is activated to drive the horizontal rotating arm. The horizontal rotating arm drives the two rotating vertical drill bits to rotate above the furnace lining, breaking the lining;

[0014] S5. After the horizontal rotating arm completes one rotation, the lifting frame drives the horizontal rotating arm to continue to descend. At this time, the vertical drill bit will drill down to the furnace lining to a certain height.

[0015] S6. The rotary drive device is restarted to rotate the horizontal rotating arm, which in turn drives the two rotating vertical drill bits to rotate again above the furnace lining to continue crushing the furnace lining;

[0016] S7. Continue until the height of the broken furnace lining is lower than the lower end surface of the top graphite ring. Then, the lifting frame drives the horizontal rotating arm and the two vertical drill bits to raise until the graphite ring can be easily removed.

[0017] S8. After the top graphite ring is removed, repeat S3-S8.

[0018] Preferably, the upper middle portion of the horizontal rotating arm is connected to the bottom of the lifting frame via a slewing bearing;

[0019] The inner ring of the slewing bearing is connected to the bottom of the lifting frame, and the upper middle position of the horizontal rotating arm is connected to the outer ring of the slewing bearing.

[0020] Preferably, the outer side wall of the outer ring of the slewing bearing is provided with external teeth;

[0021] The rotary drive device is provided with a rotary reduction motor, which is fixed to one side of the lifting frame. A driving gear is connected to the output shaft of the rotary reduction motor, and the driving gear is meshed with the outer teeth of the outer ring of the slewing support.

[0022] Preferably, the main support is provided with a lifting drive motor, and the output shaft of the lifting drive motor is connected to a ball screw;

[0023] The lifting frame is provided with a nut which is threadedly connected to the ball screw;

[0024] Two guide rods are provided on the main bracket at both sides of the lifting drive motor, and guide holes are provided on the lifting frame corresponding to the positions of the two guide rods. The guide rods and the guide holes are in guiding sliding cooperation.

[0025] Preferably, a sliding structure is provided between the two ends of the horizontal rotating arm and the support arm, and the support arm is adjusted in distance relative to the middle position of the horizontal rotating arm through the sliding structure.

[0026] Preferably, a screw rod is provided below the middle position of the horizontal rotating arm, and a connecting sleeve is sleeved on the screw rod, and the connecting sleeve can be raised and lowered on the screw rod;

[0027] Positioning nuts are screwed onto the screw rods above and below the connecting sleeve, and the position of the connecting sleeve on the screw rod can be positioned by the two positioning nuts;

[0028] The lower end surfaces of the two support arms are both located below the horizontal rotating arm. The lower end surfaces of the two support arms are respectively hinged with connecting rods, one end of the connecting rod is hinged to the lower end surface of the support arm, and the other end of the connecting rod is hinged to the connecting sleeve.

[0029] Preferably, a drill driving reduction motor is provided on the support arm, and the drill driving reduction motor can drive the vertical drill bit to rotate.

[0030] Preferably, the vertical drill bit is a diamond drill bit.

[0031] Preferably, the diameter of the vertical drill bit is smaller than the wall thickness of the outer lining of the graphite crucible.

[0032] The invention is beneficial in that:

[0033] 1. The automated mechanical equipment of the present invention realizes the rapid crushing of the furnace lining, reduces the labor intensity of workers, and avoids damage to other components on both sides during the manual crushing process. At the same time, it also reduces the crushing time of the furnace lining, indirectly increases the utilization rate of the smelting furnace, and improves production efficiency and profit margin.

[0034] 2. The present invention utilizes a horizontal rotating arm to drive two rotating vertical drill bits to crush the furnace lining step by step downward from the top. The crushing process utilizes the rotating vertical drill bits to feed along the circumferential direction of the furnace lining. Since the distance between the two vertical drill bits is equal to the diameter of the graphite crucible furnace lining, half a circle of the horizontal rotating arm can just achieve the crushing of one circle of the furnace lining.

[0035] 3. The present invention uses two symmetrically arranged vertical drill bits to work. During the crushing process, they are simultaneously subjected to the reaction force of the furnace lining, which can avoid the imbalance problem caused by a single drill bit.

[0036] 4. The present invention utilizes a connecting sleeve in conjunction with a screw rod, and is hinged to the support arms on both sides through two connecting rods, thereby ensuring the synchronization of the two support arms during movement and ensuring that the two support arms are adjusted to the same distance.

[0037] 5. In the present invention, the height of the furnace lining that is broken each time is lower than the lower end surface of the uppermost graphite ring, so the uppermost graphite ring can be taken out. In this way, when breaking, the vertical drill bit and the horizontal rotating arm will not interfere with the graphite crucible due to breaking the lower part of the furnace lining. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of a graphite crucible lining crushing mechanism for a large medium frequency melting furnace in use;

[0039] Figure 2 This is a cross-sectional view of a graphite crucible lining crushing mechanism for a large medium-frequency melting furnace in use.

[0040] In the figure: 1. Main support; 2. Lifting frame; 3. Horizontal rotating arm; 4. Support arm; 5. Vertical drill bit; 6. Lifting drive motor; 7. Ball screw; 8. Guide rod; 9. Rotary reduction motor; 10. Slewing bearing; 11. Driving gear; 12. Drill bit drive reduction motor; 13. Screw; 14. Connecting sleeve; 15. Positioning nut; 16. Connecting rod; 17. Graphite ring; 18. Furnace lining. DETAILED DESCRIPTION

[0041] To facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0042] like Figure 1 、 Figure 2 As shown, a graphite crucible lining crushing mechanism for a large medium frequency melting furnace includes a main support 1, which can be moved for position adjustment (only the upper local features of the main support 1 are shown in the figure), and a lift frame 2 is provided below the main support 1. The bottom of the lift frame 2 is rotatably connected to a horizontal rotating arm 3, and a rotary drive device is provided on one side of the lift frame 2, which can drive the horizontal rotating arm 3 to rotate at the bottom of the lift frame 2.

[0043] The middle position of the horizontal rotating arm 3 is rotatably connected to the bottom of the lifting frame 2. The two ends of the horizontal rotating arm 3 are provided with support arms 4 that can be adjusted in position. The bottom of the support arm 4 away from the horizontal rotating arm 3 is provided with a rotatable vertical drill bit 5.

[0044] The present invention utilizes a horizontal rotating arm 3 to drive two rotating vertical drill bits 5 to crush the furnace lining 18 step by step downward from the top. The crushing process utilizes the rotating vertical drill bits 5 to feed along the circumferential direction of the furnace lining 18. By adjusting the distance between the two vertical drill bits 5 to be equal to the diameter of the graphite crucible furnace lining 18, half a circle of rotation of the horizontal rotating arm 3 can just achieve one circle of crushing of the furnace lining 18.

[0045] The use of automated mechanical equipment enables rapid crushing of the furnace lining 18, reduces the labor intensity of workers, and avoids damage to other components on both sides of the furnace lining 18 during the manual crushing process. It also reduces the crushing time of the furnace lining 18, indirectly increases the utilization rate of the smelting furnace, and improves production efficiency and profit margins.

[0046] The upper middle portion of the horizontal rotating arm 3 of the present invention is connected to the bottom of the lifting frame 2 via a slewing bearing 10. Specifically, the inner ring of the slewing bearing 10 is connected to the bottom of the lifting frame 2, and the upper middle portion of the horizontal rotating arm 3 is connected to the outer ring of the slewing bearing 10. The outer side wall of the outer ring of the slewing bearing 10 is provided with external teeth. The rotary drive device is provided with a rotary reduction motor 9, which is fixed to one side of the lifting frame 2. A driving gear 11 is connected to the output shaft of the rotary reduction motor 9. The driving gear 11 meshes with the external teeth of the outer ring of the slewing bearing 10, thereby realizing the rotation of the horizontal rotating arm 3.

[0047] The main support 1 of the present invention is equipped with a lift drive motor 6. A ball screw 7 is connected to the output shaft of the lift drive motor 6. A nut is threadedly connected to the ball screw 7 on the lift frame 2. Two guide rods 8 are provided on either side of the main support 1, and guide holes are provided on the lift frame 2 corresponding to the two guide rods 8. The guide rods 8 and the guide holes are in a sliding, guiding fit. This structure enables stable lifting of the lift frame 2.

[0048] In the present invention, a sliding structure is provided between the two ends of the horizontal rotating arm 3 and the support arm 4. The support arm 4 is adjusted in distance relative to the middle position of the horizontal rotating arm 3 by the sliding structure. The sliding structure can select a slide groove or a slider structure. A screw rod 13 is provided below the middle position of the horizontal rotating arm 3. A connecting sleeve 14 is sleeved on the screw rod 13. The connecting sleeve 14 can be raised and lowered on the screw rod 13. Positioning nuts 15 are screwed on the screw rod 13 above and below the connecting sleeve 14. The position of the connecting sleeve 14 on the screw rod 13 can be positioned by the two positioning nuts 15. The lower end surfaces of the two support arms 4 are both located below the horizontal rotating arm 3. The lower end surfaces of the two support arms 4 are respectively hinged with a connecting rod 16. One end of the connecting rod 16 is hinged to the lower end surface of the support arm 4, and the other end of the connecting rod 16 is hinged to the connecting sleeve 14.

[0049] The present invention utilizes the connection sleeve 14 to cooperate with the screw rod 13, and is respectively hinged to the support arms 4 on both sides through two connection rods 16, which can ensure the synchronization of the two support arms 4 during movement and ensure the adjustment of the two support arms 4 to the same distance.

[0050] A drill drive reduction motor 12 is mounted on the support arm 4. This motor drives the vertical drill bit 5, which is preferably a diamond drill bit, which is highly strong, wear-resistant, and impact-resistant. The diameter of the drill bit 5 is smaller than the thickness of the outer lining 18 of the graphite crucible to prevent damage to the structures on both sides of the lining 18.

[0051] The present invention also provides a method for crushing a graphite crucible lining for a large medium frequency melting furnace, which is implemented by a graphite crucible lining crushing mechanism for a large medium frequency melting furnace. The specific steps are as follows:

[0052] S1 first adjust the distance between the two vertical drill bits 5 so that the distance between the two vertical drill bits 5 is equal to the diameter of the graphite crucible lining 18;

[0053] S2. Use two positioning nuts 15 to fix the connection sleeve 14 in position on the screw 13. At this time, the two arms 4 are fixed in position on the horizontal rotating arm 3;

[0054] S3. The lifting frame 2 drives the horizontal rotating arm 3 downward until the two vertical drill bits 5 contact the upper end surface of the lining 18;

[0055] S4. The vertical drill bit 5 starts to rotate, and then the rotary drive device is started to drive the horizontal rotating arm 3 to rotate. The horizontal rotating arm 3 will drive the two rotating vertical drill bits 5 to rotate above the lining 18 to crush the lining 18;

[0056] S5. After the horizontal rotating arm 3 rotates one circle, the lifting frame 2 drives the horizontal rotating arm 3 to continue to drop. At this time, the vertical drill bit 5 will drill downward to a height of the furnace lining 18;

[0057] S6. Restart the rotary drive device to drive the horizontal rotating arm 3 to rotate. The horizontal rotating arm 3 will drive the two rotating vertical drill bits 5 to rotate again above the lining 18 to continue to crush the lining 18;

[0058] S7 until the height of the broken lining 18 is lower than the lower end surface of the top graphite ring 17, and then the lifting frame 2 drives the horizontal rotating arm 3 and the two vertical drill bits 5 to lift until the graphite ring 17 can be removed;

[0059] S8. After the top graphite ring 17 is removed, repeat S3-S8.

[0060] It should be understood that the purpose of these embodiments is only to illustrate the present invention and is not intended to limit the scope of protection of the present invention. In addition, it should also be understood that after reading the technical content of the present invention, those skilled in the art may make various changes, modifications and / or variations to the present invention, and all of these equivalent forms also fall within the scope of protection defined by the claims appended hereto.

Claims

1. A method for crushing the lining of a graphite crucible for a large medium frequency melting furnace, characterized in that: The invention adopts a graphite crucible lining crushing mechanism for a large medium frequency melting furnace, wherein the graphite crucible lining crushing mechanism for a large medium frequency melting furnace comprises a main support (1), a lifting frame (2) that can be lifted and lowered is provided below the main support (1), a horizontal rotating arm (3) is rotatably connected to the bottom of the lifting frame (2), a rotary drive device is provided on one side of the lifting frame (2), and the rotary drive device can drive the horizontal rotating arm (3) to rotate at the bottom of the lifting frame (2); The middle position of the horizontal rotating arm (3) is rotatably connected to the bottom of the lifting frame (2), and support arms (4) capable of position adjustment are provided at both ends of the horizontal rotating arm (3), and a rotatable vertical drill head (5) is provided at the bottom of one end of the support arm (4) away from the horizontal rotating arm (3); The specific steps are as follows: S1. First adjust the distance between the two vertical drill bits (5) so that the distance between the two vertical drill bits (5) is equal to the diameter of the graphite crucible lining (18); S2. The positions of the two arms (4) are fixed on the horizontal rotating arm (3); S3. The lifting frame (2) drives the horizontal rotating arm (3) to descend until the two vertical drill bits (5) contact the upper end surface of the furnace lining (18); S4. The vertical drill bit (5) starts to rotate, and then the rotary drive device is started to drive the horizontal rotating arm (3) to rotate. The horizontal rotating arm (3) drives the two rotating vertical drill bits (5) to rotate above the furnace lining (18) to crush the furnace lining (18); S5. After the horizontal rotating arm (3) rotates one circle, the lifting frame (2) drives the horizontal rotating arm (3) to continue to descend. At this time, the vertical drill bit (5) will drill downward to a certain height of the furnace lining (18); S6. Restart the rotary drive device to drive the horizontal rotating arm (3) to rotate, and the horizontal rotating arm (3) will drive the two rotating vertical drill bits (5) to rotate again above the furnace lining (18), and continue to crush the furnace lining (18); S7. until the height of the broken furnace lining (18) is lower than the lower end surface of the uppermost graphite ring (17), and then the lifting frame (2) drives the horizontal rotating arm (3) and the two vertical drill bits (5) to lift until the graphite ring (17) can be removed; S8. After the top graphite ring (17) is removed, repeat S3-S8.

2. The method for crushing a graphite crucible lining for a large medium frequency melting furnace according to claim 1, characterized in that: The upper middle portion of the horizontal rotating arm (3) is connected to the bottom of the lifting frame (2) via a slewing bearing (10); The inner ring of the slewing bearing (10) is connected to the bottom of the lifting frame (2), and the upper middle position of the horizontal rotating arm (3) is connected to the outer ring of the slewing bearing (10).

3. The method for crushing a graphite crucible lining for a large medium frequency melting furnace according to claim 2, characterized in that: The outer side wall of the outer ring of the slewing bearing (10) is provided with external teeth; The rotary drive device is provided with a rotary reduction motor (9), the rotary reduction motor (9) is fixed to one side of the lifting frame (2), the output shaft of the rotary reduction motor (9) is connected to a driving gear (11), and the driving gear (11) is meshed with the outer teeth of the outer ring of the slewing bearing (10).

4. The method for crushing a graphite crucible lining for a large medium frequency melting furnace according to claim 1, characterized in that: The main support (1) is provided with a lifting drive motor (6), and the output shaft of the lifting drive motor (6) is connected to a ball screw (7); The lifting frame (2) is provided with a nut screwed to the ball screw (7); Two guide rods (8) are provided on the main bracket (1) at both sides of the lifting drive motor (6), and guide holes are provided on the lifting frame (2) at positions corresponding to the two guide rods (8), and the guide rods (8) and the guide holes are in sliding cooperation.

5. The method for crushing a graphite crucible lining for a large medium frequency melting furnace according to claim 1, characterized in that: Sliding structures are provided between the two ends of the horizontal rotating arm (3) and the support arm (4), and the support arm (4) is adjusted in distance relative to the middle position of the horizontal rotating arm (3) through the sliding structure.

6. The method for crushing the graphite crucible lining for a large medium frequency melting furnace according to claim 5, characterized in that: A screw rod (13) is provided below the middle position of the horizontal rotating arm (3), a connecting sleeve (14) is sleeved on the screw rod (13), and the connecting sleeve (14) can be raised and lowered on the screw rod (13); Positioning nuts (15) are screwed onto the screw rods (13) above and below the connecting sleeve (14), and the position of the connecting sleeve (14) on the screw rod (13) can be positioned by the two positioning nuts (15); The lower end surfaces of the two support arms (4) are both located below the horizontal rotating arm (3), and the lower end surfaces of the two support arms (4) are respectively hinged with a connecting rod (16), one end of the connecting rod (16) is hinged to the lower end surface of the support arm (4), and the other end of the connecting rod (16) is hinged to the connecting sleeve (14).

7. The method for crushing a graphite crucible lining for a large medium frequency melting furnace according to claim 1, characterized in that: The support arm (4) is provided with a drill driving reduction motor (12), and the drill driving reduction motor (12) can drive the vertical drill bit (5) to rotate.

8. The method for crushing a graphite crucible lining for a large medium frequency melting furnace according to claim 1, characterized in that: The vertical drill bit (5) is configured as a diamond drill bit.

9. The method for crushing a graphite crucible lining for a large medium frequency melting furnace according to claim 1, characterized in that: The diameter of the vertical drill bit (5) is smaller than the wall thickness of the outer furnace lining (18) of the graphite crucible.

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