Graphite crucible furnace lining crushing mechanism and crushing method for large medium-frequency smelting furnace

Abstract

The invention discloses a graphite crucible furnace lining crushing mechanism and method for a large medium-frequency smelting furnace, and belongs to the field of graphite crucible reutilization. The graphite crucible furnace lining crushing mechanism comprises a main support, a lifting frame capable of ascending and descending is arranged below the main support, the bottom of the lifting frame is rotationally connected with a horizontal rotating arm, and a rotating driving device is arranged on one side of the lifting frame; the rotary driving device can drive the horizontal rotating arm to rotate at the bottom of the lifting frame; the middle position of the horizontal rotating arm is rotationally connected with the bottom of the lifting frame, supporting arms capable of conducting position adjustment are arranged at the two ends of the horizontal rotating arm, and a rotatable vertical drill bit is arranged at the bottom of the end, away from the horizontal rotating arm, of each supporting arm. According to the invention, the outer furnace lining of the large graphite crucible can be automatically and rapidly crushed, the labor intensity is reduced, the graphite ring can be replaced, and the use cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of reuse of graphite crucibles, and particularly to a graphite crucible lining crushing mechanism and a crushing method for a large intermediate frequency melting furnace. Background Art

[0002] When melting non-ferrous metals in a large intermediate frequency melting furnace using a graphite crucible, due to the large size of the crucible, the graphite crucible often needs to be assembled from multiple graphite rings.

[0003] When the large graphite crucible is melting, the molten metal will continuously scour the graphite crucible. Due to different scouring conditions at different height positions, the service lives of components at different positions of the graphite crucible are different. Since the graphite crucible is expensive, the undamaged components 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. To remove the damaged graphite ring, the furnace lining must be removed first. Currently, the removal of the furnace lining around the large graphite crucible is all manual operation, with a very high labor intensity, and the space is narrow, and the safety risk during the operation is high.

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

[0006] For the problems existing in the prior art, a graphite crucible lining crushing mechanism and a crushing method for a large intermediate frequency melting furnace provided by the present invention can realize the automatic and rapid crushing of the outer furnace lining of the large graphite crucible, reduce the labor intensity, and enable the replacement of the graphite ring, thereby reducing the use cost.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows: A graphite crucible lining crushing mechanism for a large intermediate frequency melting furnace includes a main support, a liftable lifting frame is provided below the main support, a horizontal rotating arm is rotatably connected to the bottom of the lifting frame, a rotation driving device is provided on one side of the lifting frame, and the rotation driving device can drive the horizontal rotating arm to rotate at the bottom of the lifting frame; The middle position of the horizontal rotating arm is rotatably connected to the bottom of the lifting frame, position-adjustable support arms are provided at both ends of the horizontal rotating arm, and vertically rotatable drill bits are provided at the bottom of the ends of the support arms away from the horizontal rotating arm.

[0008] Preferably, the upper part of the middle position of the horizontal rotating arm is connected to the bottom of the lifting frame through a slewing bearing; The inner ring of the slewing bearing is connected to the bottom of the lifting frame, and the upper part of the middle position of the horizontal rotating arm is connected to the outer ring of the slewing bearing.

[0009] Preferably, an external tooth is provided on the outer side wall of the outer ring of the slewing bearing; The rotary drive device is provided with a rotary reduction motor, the rotary reduction motor is fixed on one side of the lifting frame, a driving gear is connected to the output shaft of the rotary reduction motor, and the driving gear meshes with the external tooth on the outer ring of the slewing bearing.

[0010] Preferably, a lifting drive motor is provided on the main bracket, and a ball screw is connected to the output shaft of the lifting drive motor; A nut is provided on the lifting frame and is screwed with the ball screw; Two guide rods are provided on the main bracket on both sides of the lifting drive motor, guide holes are provided on the lifting frame corresponding to the positions of the two guide rods, and the guide rods and the guide holes are in guiding and sliding fit.

[0011] Preferably, a sliding structure is provided between the two ends of the horizontal rotating arm and the supporting arm, and the supporting arm is adjusted closer to or farther from the middle position of the horizontal rotating arm through the sliding structure.

[0012] Preferably, a screw rod is provided below the middle position of the horizontal rotating arm, a connecting sleeve is sleeved on the screw rod, and the connecting sleeve can move up and down on the screw rod; Positioning nuts are screwed on the screw rod 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; The lower end surfaces of the two supporting arms are both located below the horizontal rotating arm, connecting rods are respectively hinged to the lower end surfaces of the two supporting arms, one end of the connecting rod is hinged to the lower end surface of the supporting arm, and the other end of the connecting rod is hinged to the connecting sleeve.

[0013] Preferably, a drill bit drive reduction motor is provided on the supporting arm, and the drill bit drive reduction motor can drive the vertical drill bit to rotate.

[0014] Preferably, the vertical drill bit is a diamond drill bit.

[0015] Preferably, the diameter of the vertical drill bit is smaller than the wall thickness of the outer furnace lining of the graphite crucible.

[0016] A method for breaking the furnace lining of a graphite crucible for a large medium-frequency melting furnace is realized by using a mechanism for breaking the furnace lining of a graphite crucible for a large medium-frequency melting furnace, and the specific steps are as follows: 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 furnace lining of the graphite crucible; S2. Fix the position of the connecting sleeve on the screw rod by using the two positioning nuts, and at this time, the positions of the two supporting arms on the horizontal rotating rod are fixed; S3. The lifting frame drives the horizontal rotating arm to descend until the two vertical drill bits contact the upper end surface of the furnace lining; S4. The vertical drill bit starts to rotate, and then the rotary drive device is started to drive the horizontal rotating rod to rotate. The horizontal rotating rod will drive the two rotating vertical drill bits to rotate above the furnace lining to break the furnace lining. S5. After the horizontal rotating rod rotates one full circle, the lifting frame drives the horizontal rotating arm to continue descending. At this time, the vertical drill bit will drill downward into the furnace lining for a certain height. S6. Then the rotary drive device is started again to drive the horizontal rotating rod to rotate. The horizontal rotating rod will drive the two rotating vertical drill bits to rotate above the furnace lining again to continue breaking the furnace lining. S7. Until the height of the broken furnace lining is lower than the lower end face of the uppermost graphite ring, and then the lifting frame drives the horizontal rotating rod and the two vertical drill bits to rise until it is convenient to take out the graphite ring. S8. After the uppermost graphite ring is taken out, repeat S3 - S8.

[0017] The advantages of this invention are as follows: 1. The automated mechanical equipment of this invention realizes the rapid crushing treatment of the furnace lining, reduces the labor intensity of workers, avoids damage to other components on both sides during manual crushing, reduces the furnace lining crushing time, indirectly increases the utilization rate of the melting furnace, and improves production efficiency and profit margin.

[0018] 2. This invention uses the horizontal rotating rod to drive the two rotating vertical drill bits to break downward step by step from above the furnace lining. During the breaking process, the rotating vertical drill bits 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, the horizontal rotating rod can exactly break one full circle of the furnace lining when it rotates half a circle.

[0019] 3. This invention uses two symmetrically arranged vertical drill bits to work. During the breaking process, it is simultaneously subjected to the reaction force of the furnace lining, which can avoid the imbalance problem caused by a single drill bit.

[0020] 4. This invention uses the connecting sleeve to cooperate with the screw rod, and is respectively hinged to the supporting arms on both sides through two connecting rods, which can ensure the synchronism of the two supporting arms during the movement and ensure the adjustment of the same distance of the two supporting arms.

[0021] 5. Each time the height of the broken furnace lining of this invention is lower than the lower end face of the uppermost graphite ring, the uppermost graphite ring can be taken out. In this way, during breaking, the vertical drill bit and the horizontal rotating rod will not interfere with the graphite crucible when breaking the bottom of the furnace lining. Description of the Drawings

[0022] Figure 1 It is a schematic diagram when a graphite crucible furnace lining breaking mechanism for a large - scale intermediate - frequency melting furnace is in use; Figure 2It is a cross-sectional view when a graphite crucible furnace lining crushing mechanism for a large medium-frequency melting furnace is in use.

[0023] 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. Locknut; 16. Connecting rod; 17. Graphite ring; 18. Furnace lining. Specific implementation mode

[0024] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0025] As Figure 1 、 Figure 2 shown, a graphite crucible furnace lining crushing mechanism for a large medium-frequency melting furnace includes a main support 1. The main support 1 can be moved for position adjustment (only the upper partial features of the main support 1 are shown in the figure). A liftable lifting frame 2 is provided below the main support 1. The bottom of the lifting frame 2 is rotatably connected to a horizontal rotating arm 3. A rotating drive device is provided on one side of the lifting frame 2, and the rotating drive device can drive the horizontal rotating arm 3 to rotate at the bottom of the lifting frame 2.

[0026] The middle position of the horizontal rotating arm 3 is rotatably connected to the bottom of the lifting frame 2. Position-adjustable support arms 4 are provided at both ends of the horizontal rotating arm 3. A rotatable vertical drill bit 5 is provided at the bottom of the end of the support arm 4 away from the horizontal rotating arm 3.

[0027] The present invention uses the horizontal rotating rod to drive the two rotating vertical drill bits 5 to gradually break downward from above the furnace lining 18. In the crushing process, the rotating vertical drill bits 5 feed along the circumferential direction of the furnace lining 18. By adjustment, the distance between the two vertical drill bits 5 is equal to the diameter of the graphite crucible furnace lining 18. Therefore, when the horizontal rotating rod rotates half a circle, it can just complete the crushing of one circle of the furnace lining 18.

[0028] The rapid crushing treatment of the furnace lining 18 is realized by using automated mechanical equipment, reducing the labor intensity of workers, avoiding damage to other components on both sides of the furnace lining 18 during the manual crushing process, reducing the crushing time of the furnace lining 18, indirectly increasing the utilization rate of the melting furnace, and improving the production efficiency and profit rate.

[0029] Above the middle position of the horizontal rotating arm 3 of the present invention, it is connected to the bottom of the lifting frame 2 through a slewing bearing 10. Specifically, the inner ring of the slewing bearing 10 is connected to the bottom of the lifting frame 2, and above the middle position 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. The rotary reduction motor 9 is fixed on 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.

[0030] On the main support 1 of the present invention, a lifting drive motor 6 is provided. A ball screw 7 is connected to the output shaft of the lifting drive motor 6. A nut is provided on the lifting frame 2 and is screwed with the ball screw 7. On the main support 1, two guide rods 8 are provided on both sides of the lifting drive motor 6. Guide holes are provided on the lifting frame 2 corresponding to the positions of the two guide rods 8. The guide rods 8 and the guide holes are in guiding sliding fit. Using the above structure, the stable lifting action of the lifting frame 2 can be realized.

[0031] A sliding structure is provided between both ends of the horizontal rotating arm 3 of the present invention and the supporting arm 4. The supporting arm 4 can be adjusted closer to or farther from the middle position of the horizontal rotating arm 3 through the sliding structure. The sliding structure can select a chute and slider structure. Below the middle position of the horizontal rotating arm 3, a screw rod 13 is provided. A connecting sleeve 14 is sleeved on the screw rod 13. The connecting sleeve 14 can move up and down 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 through the two positioning nuts 15. The lower end faces of both supporting arms 4 are located below the horizontal rotating arm 3. Connecting rods 16 are respectively hinged to the lower end faces of the two supporting arms 4. One end of the connecting rod 16 is hinged to the lower end face of the supporting arm 4, and the other end of the connecting rod 16 is hinged to the connecting sleeve 14.

[0032] The present invention utilizes the cooperation between the connecting sleeve 14 and the screw rod 13, and through the two connecting rods 16 being respectively hinged to the supporting arms 4 on both sides, the synchronism of the two supporting arms 4 during the movement can be ensured, and the adjustment of the same distance of the two supporting arms 4 is guaranteed.

[0033] A drill drive reduction motor 12 is provided on the supporting arm 4. The drill drive reduction motor 12 can drive the vertical drill 5 to rotate. The vertical drill 5 is preferably a diamond drill, which has the capabilities of high strength, high wear resistance and impact resistance. The diameter of the vertical drill 5 is smaller than the wall thickness of the outer furnace lining 18 of the graphite crucible, so as to avoid damage to the structures on both sides of the furnace lining 18.

[0034] The present invention also provides a method for breaking the furnace lining of a graphite crucible for a large intermediate frequency melting furnace, which is realized by using a mechanism for breaking the furnace lining of a graphite crucible for a large intermediate frequency melting furnace. The specific steps are as follows: S1. First, adjust the distance between the two vertical drills 5 so that the distance between the two vertical drills 5 is equal to the diameter of the graphite crucible lining 18; S2. Use two positioning nuts 15 to fix the position of the connecting sleeve 14 on the screw rod 13. At this time, the positions of the two support arms 4 on the horizontal rotating rod are fixed; S3. The lifting frame 2 drives the horizontal rotating arm 3 to descend until the two vertical drills 5 contact the upper end surface of the lining 18; S4. The vertical drills 5 start to rotate, and then start the rotary drive device to drive the horizontal rotating rod to rotate. The horizontal rotating rod will drive the two rotating vertical drills 5 to rotate above the lining 18 to break the lining 18; S5. After the horizontal rotating rod rotates one full circle, the lifting frame 2 drives the horizontal rotating arm 3 to continue descending. At this time, the vertical drills 5 will drill down the lining 18 by a certain height; S6. Then start the rotary drive device to drive the horizontal rotating rod to rotate. The horizontal rotating rod will drive the two rotating vertical drills 5 to rotate above the lining 18 again to continue breaking the lining 18; S7. Until the height of the broken 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 rod and the two vertical drills 5 to rise until it is convenient to take out the graphite ring 17; S8. After the uppermost graphite ring 17 is taken out, repeat S3 - S8.

[0035] It should be understood that the use of these embodiments is only for illustrating the present invention and is not intended to limit the protection scope 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 can make various changes, modifications and / or variations to the present invention, and all these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. A graphite crucible furnace lining crushing mechanism for a large medium-frequency melting furnace, characterized in that It includes a main support (1), a liftable lifting frame (2) is provided below the main support (1), a horizontal rotating arm (3) is rotatably connected to the bottom of the lifting frame (2), a rotation driving device is provided on one side of the lifting frame (2), and the rotation driving 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), position-adjustable support arms (4) are provided at both ends of the horizontal rotating arm (3), and a rotatable vertical drill bit (5) is provided at the bottom of the end of the support arm (4) away from the horizontal rotating arm (3).

2. The graphite crucible furnace lining crushing mechanism for a large medium-frequency melting furnace according to claim 1, wherein, A slewing bearing (10) is connected between the upper part of the middle position of the horizontal rotating arm (3) and the bottom of the lifting frame (2); The inner ring of the slewing bearing (10) is connected to the bottom of the lifting frame (2), and the upper part of the middle position of the horizontal rotating arm (3) is connected to the outer ring of the slewing bearing (10).

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

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

5. The graphite crucible furnace lining crushing mechanism for a large medium-frequency melting furnace according to claim 1, characterized in that, A sliding structure is provided between both ends of the horizontal rotating arm (3) and the support arm (4), and the support arm (4) can be adjusted closer to or farther from the middle position of the horizontal rotating arm (3) through the sliding structure.

6. The graphite crucible furnace lining crushing mechanism 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 move up and down on the screw rod (13); Positioning nuts (15) are screwed on the screw rod (13) above and below the connecting sleeve (14), and the position of the connecting sleeve (14) on the screw rod (13) can be positioned through the two positioning nuts (15); The lower end faces of both support arms (4) are located below the horizontal rotating arm (3), connecting rods (16) are respectively hinged to the lower end faces of the two support arms (4), one end of the connecting rod (16) is hinged to the lower end face of the support arm (4), and the other end of the connecting rod (16) is hinged to the connecting sleeve (14).

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

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

9. A graphite crucible furnace lining crushing mechanism 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.

10. A method for breaking the lining of a graphite crucible for a large medium-frequency melting furnace, characterized in that, It is realized by using the graphite crucible furnace lining crushing mechanism for large medium-frequency melting furnaces described in any one of claims 1 to 9, and 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 furnace lining (18); S2. Use two positioning nuts (15) to fix the position of the connecting sleeve (14) on the screw rod (13). At this time, the positions of the two support arms (4) on the horizontal rotating rod are fixed; 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 bits (5) start to rotate, and then start the rotary drive device to drive the horizontal rotating rod to rotate. The horizontal rotating rod will drive 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 rod rotates one full circle, the lifting frame (2) drives the horizontal rotating arm (3) to continue descending. At this time, the vertical drill bits (5) will drill down the furnace lining (18) by a certain height; S6. Then start the rotary drive device to drive the horizontal rotating rod to rotate. The horizontal rotating rod will drive the two rotating vertical drill bits (5) to rotate above the furnace lining (18) again to continue crushing the furnace lining (18); S7. Until the height of the crushed 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 rod and the two vertical drill bits (5) to rise until it is convenient to take out the graphite ring (17); S8. After the uppermost graphite ring (17) is taken out, repeat S3 - S8.

Images