Secondary roasting device and roasting method for graphite electrode production

Abstract

The invention discloses a secondary roasting device and roasting method for graphite electrode production, and belongs to the technical field of graphite electrode roasting devices.The secondary roasting device for graphite electrode production comprises a furnace body and two sliding rails arranged on one side of the furnace body, and a bottom plate is assembled on the sliding rails in a sliding mode; the bearing plate can be pulled out of the furnace body through cooperation of the hook plate and the connecting groove, when a new bearing plate falls onto the inner barrier strip and the outer barrier strip, the reversing assembly can release the locking relation with the inner barrier strip, then the pulling force direction of the auxiliary steel cable on the guide block is changed, the auxiliary steel cable can pull the bottom plate to gradually get close to the furnace body, and therefore the furnace body is protected. And the bearing plate is pushed into the furnace body through the ejector rod, manual intervention is little in the whole process, so that the process of entering and exiting the furnace is safer, the whole operation is completed only through cooperation of the main steel cable and the auxiliary steel cable, and the device is simple in overall structure and convenient to maintain.

Description

Technical Field

[0001] The present invention relates to the technical field of graphite electrode baking devices, and particularly relates to a secondary baking device and a baking method for graphite electrode production. Background Art

[0002] The production of graphite electrodes includes steps such as raw material preparation (petroleum coke, pitch coke, etc.), crushing, batching, kneading, forming, primary baking, impregnation, secondary baking, graphitization, etc.

[0003] Chinese Patent CN218097234U discloses an out-of-furnace device for a graphite electrode baking furnace. By providing a supporting table and a toothed plate, when the transport vehicle moves to the end of the track, the toothed plate will engage and drive with the gear at the shaft end of the supporting table, thereby driving the supporting table to flip along the shaft end to make the workpiece slide onto the receiving device for automatic unloading operation.

[0004] The above device realizes the out-of-furnace operation of graphite electrodes through a transport vehicle. However, in actual application, the staff still needs to approach the furnace body for operation, which poses certain safety hazards. Moreover, it is difficult to load the loaded graphite electrodes into the furnace body through the above device. In summary, the above device still has room for improvement.

[0005] Therefore, it is necessary to provide a secondary baking device and a baking method for graphite electrode production to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a secondary baking device and a baking method for graphite electrode production to solve the problem that in the existing device, the out-of-furnace operation of graphite electrodes is realized through a transport vehicle, but in actual application, the staff still needs to approach the furnace body for operation, which poses certain safety hazards as mentioned in the above background art.

[0007] Based on the above idea, the present invention provides the following technical solution: A secondary baking device for graphite electrode production, including a furnace body and two slide rails arranged on one side of the furnace body. A bottom plate is slidably assembled on the slide rails. Outer retaining strips are fixedly connected to both sides of the top of the bottom plate, and inner retaining strips are arranged at the inner positions of the outer retaining strips. A bearing plate is arranged above the outer retaining strips and the inner retaining strips, and the bearing plate can be pushed to move by push rods at the tops of the outer retaining strips and the inner retaining strips. A guiding block is fixedly installed on the bottom surface of the push rod, and the guiding block slides between the two inner retaining strips; A secondary steel cable is arranged between the two slide rails, and a reversing component is arranged between the two inner retaining strips, and the reversing component can be clamped with the inner retaining strips. One end of the secondary steel cable is fixedly connected to the surface of the guide block close to the reversing component. The other end of the secondary steel cable bypasses the reversing component and then extends to the pulley at the end of the slide rail, and finally bypasses the pulley and extends in the direction away from the furnace body. When the connection between the reversing component and the inner retaining strip is disengaged, during the process of the secondary steel cable pulling the reversing component to move synchronously, the bearing plate can be pushed into the furnace body through the push rod.

[0008] As a further solution of the present invention: The reversing component includes a reversing shaft arranged between the two inner retaining strips. Connecting blocks are rotatably installed at both ends of the reversing shaft. The secondary steel cable bypasses the outside of the reversing shaft. A clamping block is elastically connected to the side surface of the connecting block close to the inner retaining strip. A through groove is opened on the inner retaining strip. Bevels are arranged on both sides of the end of the clamping block close to the inner retaining strip. When the bevels are completely inserted into the through groove, the clamping block is locked with the inner retaining strip.

[0009] As a further solution of the present invention: A pressure rod is elastically connected in the through groove. An inclined extrusion surface is arranged at the end of the pressure rod located outside the through groove. A lifting plate is arranged between the inner retaining strip and the outer retaining strip. The lifting plate is elastically connected to the bottom plate. During the process of the lifting plate moving downward, it can contact the inclined extrusion surface on the pressure rod, thereby pushing the pressure rod. A pressure strip is hinged to the top surface of the lifting plate. In the initial state, the pressure strip is in a vertical state.

[0010] As a further solution of the present invention: A notch is opened on the inner side surface of the inner retaining strip. The notch is located at the end of the inner retaining strip close to the furnace body. A limiting block matched with the notch is elastically connected to the surface of the guide block close to the inner retaining strip. The end of the limiting block located inside the notch is an arc surface.

[0011] As a further solution of the present invention: A support rod is hinged to the push rod. A hook plate is rotatably connected to the bottom surface of the support rod. In the initial state, the hook plate is in a vertical state and can only deflect inward relative to the support rod. A connection groove matched with the hook plate is opened on the bearing plate.

[0012] As a further solution of the present invention: A top rod is threadedly connected to the push rod.

[0013] As a further solution of the present invention: A front stop block and a rear stop block are respectively fixed at both ends on the top of the slide rail.

[0014] As a further solution of the present invention: A convex part extends upward from one side of the top of the hook plate. When the hook plate is in a vertical state, the top surface of the convex part can contact the bottom surface of the support rod.

[0015] As a further solution of the present invention: a groove matching with the support rod is formed on the push rod, and one end of the support rod away from the hook plate is rotatably connected in the groove.

[0016] A method of roasting using the secondary roasting device for the production of the above-mentioned graphite electrodes includes the following steps: pulling the bottom plate to one side of the furnace body through the auxiliary steel cable. When the hook plate is matched with the connecting groove, the auxiliary steel cable can pull the push rod so that the bearing plate moves out of the furnace body; when the bearing plate is placed on the top of the inner retaining strip and the outer retaining strip from top to bottom, the clamping relationship between the reversing assembly and the inner retaining strip is released. When the auxiliary steel cable drives the bottom plate to move to one side of the furnace body, the auxiliary steel cable can drive the reversing assembly to move synchronously, so as to push the bearing plate into the furnace body.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: This device can pull the bearing plate out of the furnace body through the cooperation of the hook plate and the connecting groove. When the new bearing plate falls on the inner retaining strip and the outer retaining strip, the reversing assembly can release the locking relationship with the inner retaining strip, and then change the pulling force direction of the auxiliary steel cable on the guide block, so that the auxiliary steel cable can pull the bottom plate gradually close to the furnace body, and push the bearing plate into the furnace body through the ejector rod. There is less manual intervention in the whole process, so that the process of entering and leaving the furnace is safer, and the whole operation is completed only through the cooperation of the main steel cable and the auxiliary steel cable, making the overall structure of the device simple and easy to repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the drawings and embodiments: Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the distribution diagram of the inner retaining strip and the outer retaining strip of the present invention; Figure 3 is the structural schematic diagram of the bearing plate and the bottom plate of the present invention; Figure 4 is the present invention Figure 3 The enlarged structural schematic diagram at A of; Figure 5 is the cross-sectional view of the bottom plate and the bearing plate of the present invention; Figure 6 is the structural schematic diagram of the main steel cable and the auxiliary steel cable of the present invention; Figure 7 is the structural schematic diagram of the positioning strip and the limiting groove of the present invention; Figure 8 is the structural schematic diagram of the pressure rod and the clamping block of the present invention; Figure 9 is the structural schematic diagram of the torsion unit of the present invention; Figure 10 is the structural schematic diagram of the inclined plane and the extrusion surface of the present invention; Figure 11It is a schematic diagram of the lath of the present invention in a vertical state; Figure 12 It is a schematic diagram of the lath of the present invention in a horizontal state; Figure 13 It is a schematic diagram of the structure of the limit block of the present invention; Figure 14 It is a schematic diagram of the hook plate pulling the bearing plate of the present invention.

[0019] In the figure: 1. Furnace body; 2. Furnace door; 3. Slide rail; 301. Rear stop block; 302. Front stop block; 4. Control cabinet; 5. Bottom plate; 501. Outer retaining strip; 5011. Limit groove; 502. Inner retaining strip; 5021. Stop portion; 5022. Notch; 5023. Through groove; 503. Slide block; 6. Push rod; 601. Guide block; 7. Bearing plate; 701. Positioning strip; 702. Connection groove; 8. Pulley; 9. Boss; 901. Positioning groove; 10. Thumb rod; 11. Main steel cable; 12. Auxiliary steel cable; 13. Support rod; 14. Reversing shaft; 15. Connecting block; 16. Hook plate; 1601. Protruding portion; 17. Block; 1701. Inclined surface; 18. Pressure rod; 1801. Convex block; 1802. Extrusion surface; 19. Lath; 1901. Rotating shaft; 1902. Torsion unit; 20. Connecting shaft; 21. Lifting plate; 22. Base; 23. Limit block; 2301. Arc surface. Detailed implementation manners

[0020] As Figures 1 - 10 shown, a secondary roasting device and roasting method for the production of graphite electrodes include a furnace body 1 and two slide rails 3 arranged on one side of the furnace body 1. One side of the furnace body 1 close to the slide rails 3 is sealed by a furnace door 2. The furnace door 2 can move up and down relative to the furnace body 1. The connection structure between the furnace door 2 and the furnace body 1 is a mature technical means and will not be elaborated here; A bottom plate 5 is slidably assembled on the slide rails 3. Referring to Figure 1 shown, outer retaining strips 501 are fixedly connected to both sides of the top of the bottom plate 5, and inner retaining strips 502 are arranged at the inner side positions of the outer retaining strips 501. The inner retaining strips 502 are fixedly connected to the bottom plate 5. In order to convey the graphite electrodes, a bearing plate 7 for placing the graphite electrodes is arranged above the outer retaining strips 501 and the inner retaining strips 502, and the push rod 6 above the outer retaining strips 501 and the inner retaining strips 502 can drive the bearing plate 7 to move on the horizontal plane. Specifically, a guide block 601 is fixedly installed at the bottom surface of the push rod 6, and the guide block 601 slides between the two inner retaining strips 502; Combined with Figures 1 - 5As shown in the figure, a main steel cable 11 and a secondary steel cable 12 are arranged between the two slide rails 3 for pulling the guide block 601 in two directions. Specifically, a reversing component is arranged between the two inner retaining strips 502, and the reversing component can be clamped with the inner retaining strip 502. One end of the secondary steel cable 12 is fixedly connected to the side of the guide block 601 close to the reversing component. The other end of the secondary steel cable 12 bypasses the reversing component and extends to the pulley 8 at the end of the slide rail 3, and finally bypasses the pulley 8 and extends in the direction away from the furnace body 1. The pulley 8 is arranged at one end of the slide rail 3 close to the furnace body 1, and the pulley 8 is fixed to the ground. With this structure, when the reversing component is clamped with the inner retaining strip 502, the push rod 6 can be pulled through the secondary steel cable 12. When the connection between the reversing component and the inner retaining strip 502 is disengaged, the secondary steel cable 12 can pull the reversing component and the push rod 6 to move synchronously, so as to realize the charging and discharging of the graphite electrode.

[0021] Combined with Figures 5 - 10 As shown in the figure, the reversing component includes a reversing shaft 14 arranged between the two inner retaining strips 502. Connecting blocks 15 are rotatably installed at both ends of the reversing shaft 14 through bearings, and the connecting blocks 15 are arranged in contact with the inner walls of the inner retaining strips 502. Combined with Figure 5 As shown in the figure, one side of the top of the inner retaining strip 502 extends towards the connecting block 15 to form a stop portion 5021, and the connecting block 15 is arranged between the stop portion 5021 and the bottom plate 5. The secondary steel cable 12 bypasses the outside of the reversing shaft 14. Refer to Figures 7 - 8 As shown in the figure, a clamping block 17 is elastically connected to one side of the connecting block 15 close to the inner retaining strip 502, and a through slot 5023 is formed in the inner retaining strip 502; Further, combined with Figure 10 As shown in the figure, inclined surfaces 1701 are arranged on both sides of one end of the clamping block 17 close to the inner retaining strip 502. With this structure, when the inclined surfaces 1701 on the clamping block 17 are completely inserted into the through slot 5023, the clamping block 17 can be clamped and locked with the inner retaining strip 502. When only a part of the inclined surface 1701 is inside the through slot 5023, the clamping block 17 can move out of the through slot 5023 by overcoming the elastic force between it and the connecting block 15. Combined with Figure 8 、 Figure 10 As shown in the figure, a pressure rod 18 is elastically connected in the through slot 5023. One end of the pressure rod 18 located inside the through slot 5023 can contact the clamping block 17, and the other end of the pressure rod 18 close to the outer retaining strip 501 extends outside the through slot 5023. An inclined extrusion surface 1802 is arranged at the end of the pressure rod 18 located outside the through slot 5023; Furthermore, a lifting plate 21 is arranged between the inner retaining strip 502 and the outer retaining strip 501. Combined with Figures 8 - 12As shown, the lifting plate 21 is elastically connected to the bottom plate 5 and the lifting plate 21 can move relative to the bottom plate 5 in the vertical direction (a support spring is fixedly arranged between the lifting plate 21 and the bottom plate 5), and during the process of the lifting plate 21 moving downward, it can contact the inclined extrusion surface 1802 on the pressure bar 18, thereby pushing the pressure bar 18; Refer to Figures 11 - 12 As shown, a pressure bar 19 is hinged to the top surface of the lifting plate 21. The pressure bar 19 can rotate relative to the lifting plate 21, and in the initial state, the pressure bar 19 is in a vertical state.

[0022] Refer to Figures 1 - 2 、 Figures 7 - 8 As shown, a notch 5022 is further formed on the inner side surface of the inner retaining strip 502. The notch 5022 is located at one end of the inner retaining strip 502 close to the furnace body 1. Combining Figure 13 As shown, a limiting block 23 that cooperates with the notch 5022 is elastically connected to one side of the guiding block 601 close to the inner retaining strip 502 (a rectangular groove for the sliding fit with the limiting block 23 is formed on the guiding block 601, and a second spring is fixedly arranged between the inner end surface of the rectangular groove and the limiting block 23), and the end of the limiting block 23 that can be inserted into the notch 5022 is an arc surface 2301. Through this structure, when the pressure between the limiting block 23 and the side edge of the notch 5022 increases, the limiting block 23 can overcome the elastic force between it and the guiding block 601 and move out of the notch 5022.

[0023] During actual use, in order to pull the bearing plate 7 out of the furnace body 1, a support rod 13 is hinged to the push rod 6 in this solution. The support rod 13 can rotate relative to the push rod 6 along the up and down direction, and a hook plate 16 is hinged to the bottom surface of the support rod 13. Combining Figures 3 - 4 As shown, in the initial state, the hook plate 16 is in a vertical state and can only deflect inward relative to the support rod 13, and a connection groove 702 that cooperates with the hook plate 16 is formed on the bearing plate 7. When the auxiliary steel cable 12 drives the bottom plate 5 to move to one side of the furnace body 1, the hook plate 16 on the support rod 13 can be squeezed and deflected by the bearing plate 7 in the furnace body 1. When the hook plate 16 falls into the connection groove 702, through the cooperation between the hook plate 16 and the connection groove 702, the support rod 13 can pull the bearing plate 7 out of the furnace body 1.

[0024] Working principle: In the initial state, the guiding block 601 is at the notch 5022, and one end of the limiting block 23 is inserted into the socket, so as to maintain a stable connection between the guiding block 601 and the inner retaining strip 502. And the connecting block 15 is at the position of the through groove 5023 in the initial state, so that the inclined surface 1701 on the clamping block 17 can be completely inserted into the through groove 5023, so as to lock between the connecting block 15 and the inner retaining strip 502. When it is necessary to take out the bearing plate 7 in the furnace body 1, the guiding block 601 can be pulled by winding the auxiliary steel cable 12. However, the limiting block 23 is in the notch 5022, and the frictional force between the bottom plate 5 and the sliding rail 3 is not sufficient to cause the limiting block 23 to overcome the elastic force between it and the guiding block 601 and move out of the notch 5022. Therefore, the pulling force of the auxiliary steel cable 12 can drive the push rod 6 and the bottom plate 5 to move to one side of the furnace body 1. During this process, the hook plate 16 on the support rod 13 will be deflected by the bearing plate 7 in the furnace body 1. When the hook plate 16 moves to the connecting groove 702 and deflects downward to the vertical state, the bearing plate 7 in the furnace body 1 can be pulled by the hook plate 16; When the auxiliary steel cable 12 is continuously wound, the pulling force of the auxiliary steel cable 12 on the guiding block 601 causes the pressure between the limiting block 23 and the side edge of the notch 5022 to gradually increase, so that the limiting block 23 can overcome the elastic force between it and the guiding block 601 and move out of the notch 5022, so that the hook plate 16 can pull the bearing plate 7 to move it out of the furnace body 1 and move to the inner retaining strip 502 and the outer retaining strip 501 on the top of the bottom plate 5. When the guiding block 601 is pulled by the auxiliary steel cable 12 to near the reversing shaft 14, it stops moving. At this time, the bearing plate 7 in the furnace body 1 has completely moved above the inner retaining strip 502 and the outer retaining strip 501; After that, the guiding block 601 connected by the main steel cable 11 can be pulled away from the furnace body 1. Of course, during the process of winding the main steel cable 11, the auxiliary steel cable 12 needs to be in the unwinding state. When the main steel cable 11 pulls the bottom plate 5 to the specified position on the sliding rail 3, start the overhead crane in the workshop, and the bearing plate 7 can be lifted by the overhead crane; During the process of the hook plate 16 pulling the bearing plate 7 out of the furnace body 1, the bearing plate 7 moves along with the inner retaining strip 502 and the outer retaining strip 501. Therefore, the bearing plate 7 only drives the pressing strip 19 to deflect relative to the lifting plate 21, but the lifting plate 21 is always in a stable state. And during the process of the overhead crane placing the bearing plate 7 carrying the graphite electrode from top to bottom on the top of the outer retaining strip 501 and the inner retaining strip 502, the bearing plate 7 will press down the pressing strip 19 and drive the lifting plate 21 to move downward. According to the above description, when the lifting plate 21 moves downward, it will squeeze the pressing rod 18, so as to push the clamping block 17 through the pressing rod 18, so that the clamping block 17 can move a certain distance away from the inner retaining strip 502, but the inclined surface 1701 on the clamping block 17 will not completely move out of the through groove 5023. Refer to Figure 14As shown, in the process of winding up the auxiliary steel cable 12, the friction force between the bottom plate 5 and the slide rail 3 is not enough to make the block 17 overcome the elastic force between it and the connecting block 15 and move out of the through groove 5023. Therefore, in the process of winding up the auxiliary steel cable 12, the bottom plate 5 can be pulled on the slide rail 3 to slide toward the furnace body 1 through the connecting block 15. When the bottom plate 5 moves to the limit position, the pulling force of the auxiliary steel cable 12 on the reversing shaft 14 can drive the connecting block 15 to move between the two inner stop bars 502 and approach the furnace body 1. Figures 1 - 4 As shown, a push rod 10 is threadedly connected to the push rod 6. In the process of transporting the supporting plate 7 into the furnace body 1, the staff needs to deflect the support rod 13 upward to separate the hook plate 16 from the connecting groove 702, and one end of the push rod 10 is against the side of the supporting plate 7. In this way, when the bottom plate 5 is pulled to the side of the furnace body 1 by the auxiliary steel cable 12 and the auxiliary steel cable 12 is continuously wound, the pressure between the clamping block 17 and the side edge of the through groove 5023 increases, so that the clamping block 17 can be moved out of the through groove 5023, so that the guide block 601 and the push rod 6 and other structures can be close to the furnace body 1. In this process, the supporting plate 7 can be pushed into the furnace body 1 by the push rod 10. At this point, the graphite is taken out of the furnace and put into the furnace.

[0025] To sum up, this device can pull the carrying plate 7 out of the furnace body 1 through the cooperation of the hook plate 16 and the connecting groove 702. When the new carrying plate 7 falls on the inner baffle 502 and the outer baffle 501, the reversing assembly can release the locking relationship between the inner baffle 502, thereby changing the pulling direction of the auxiliary steel cable 12 on the guide block 601, so that the auxiliary steel cable 12 can pull the bottom plate 5 gradually close to the furnace body 1, and push the carrying plate 7 into the furnace body 1 through the top rod 10. There is little manual intervention in the whole process, which makes the process of entering and exiting the furnace safer, and the whole operation is completed only through the cooperation of the main steel cable 11 and the auxiliary steel cable 12, so that the overall structure of the device is simple and easy to maintain.

[0026] like Figure 1 As shown, a control cabinet 4 is provided at one end of the slide rail 3 away from the furnace body 1, and two groups of motors (not shown in the figure) are arranged in the control cabinet 4. The two groups of motors are used to reel in the main steel cable 11 and the auxiliary steel cable 12 respectively. Of course, a reel is connected to the output shaft of the motor, and the auxiliary steel cable 12 and the main steel cable 11 are respectively connected to the reels on the two groups of motors. This structure is conducive to driving the bottom plate 5 to move along the slide rail 3.

[0027] Refer again Figure 1 As shown, sliders 503 slidably matched with the slide rails 3 are fixedly installed on both sides of the bottom of the base plate 5. Specifically, rollers matched with the slide rails 3 are installed on the sliders 503 to reduce the friction between the sliders 503 and the slide rails 3.

[0028] At the top of the slide rail 3 and at both ends, a front stop block 302 and a rear stop block 301 are respectively fixed to limit the traveling position of the slider 503. Specifically, when the slider 503 moves to the rear stop block 301, it stops moving. At this time, the hook plate 16 on the support rod 13 can be inserted into the connection groove 702, thereby pulling the bearing plate 7 in the furnace body 1 to move. The slider 503 can be tightly abutted against the rear stop block 301 to keep the bottom plate 5 stable.

[0029] Combined with Figure 2 、 Figure 7 As shown in the figure, convex platforms 9 can be fixedly installed on both inner side walls of the furnace body 1. The top surfaces of the convex platforms 9, the inner stop strip 502, and the outer stop strip 501 are flush. A positioning groove 901 is provided on the top surface of the convex platform 9, and a limiting groove 5011 can be provided on the top surface of the outer stop strip 501 so that the limiting groove 5011 is aligned with the positioning groove 901. Positioning strips 701 are fixedly installed on both sides of the bottom of the bearing plate 7. When the bearing plate 7 is pulled out of the furnace body 1, the positioning strips 701 can slide from the positioning groove 901 into the limiting groove 5011, thereby improving the stability of the movement of the bearing plate 7.

[0030] Referring to Figure 4 As shown in the figure, a raised portion 1601 extends upward on one side of the top of the hook plate 16. When the hook plate 16 is in a vertical state, the top surface of the raised portion 1601 can contact the bottom surface of the support rod 13, so that the hook plate 16 can only deflect inward relative to the support rod 13. A connecting shaft 20 is provided between the hook plate 16 and the support rod 13. The connecting shaft 20 is located on one side of the raised portion 1601, and the connecting shaft 20 is fixedly connected to the hook plate 16 through a fixing block. A convex strip is fixedly provided at the bottom of the support rod 13, so that the connecting shaft 20 passes through the convex strip and is rotatably connected thereto, so that the hook plate 16 and the support rod 13 are rotationally matched. Of course, in actual use, the hook plate 16 and the support rod 13 can also be rotationally matched through a hinge or a hinge, which will not be elaborated here.

[0031] A groove matching with the support rod 13 is provided on the push rod 6. One end of the support rod 13 away from the hook plate 16 is rotatably connected in the groove. Through this structure, when the hook plate 16 pulls the bearing plate 7 out of the furnace body 1 and moves to a specified position, the staff can rotate the support rod 13 upward to separate the hook plate 16 from the connection groove 702, which is beneficial for the overhead crane in the workshop to lift the bearing plate 7 (a hook matching with the overhead crane can be fixedly installed on the bearing plate 7).

[0032] Referring to Figures 5 - 6 As shown in the figure, the end of the auxiliary steel cable 12 fixed to the guide block 601 is on the side of the guide block 601 away from the furnace body 1.

[0033] Referring to Figure 8As shown, an installation groove slidably engaged with the clamping block 17 is formed in the connection block 15, and a first spring is fixedly arranged between the inner end face of the installation groove and the clamping block 17. Bar-shaped grooves are formed in both the top wall and the bottom wall of the inner cavity of the through groove 5023. A convex block 1801 slidably engaged with the bar-shaped groove is fixedly arranged on the pressing rod 18. A limiting spring is fixed between the convex block 1801 and the end face of the bar-shaped groove, and the limiting spring is located on the side of the convex block 1801 close to the clamping block 17, so as to realize the elastic cooperation between the pressing rod 18 and the inner retaining strip 502.

[0034] Combined with Figure 9 、 Figures 11 - 12 As shown, bases 22 are arranged on both the front and the rear sides of the pressing strip 19. The bases 22 are fixed to the top surface of the lifting plate 21. A rotating shaft 1901 rotatably engaged with the bases 22 is fixedly arranged on the pressing strip 19. A through circular hole is formed in the base 22, so that the rotating shaft 1901 passes through the circular hole. An annular groove is formed in the outer peripheral wall of the rotating shaft 1901, and a torsion unit 1902 is sleeved on the annular groove. The torsion unit 1902 can be a torsion spring or a coil spring. The two ends of the torsion unit 1902 are respectively connected to the rotating shaft 1901 and the base 22. In the initial state, the pressing strip 19 can be in a vertical state, and the top end of the pressing strip 19 protrudes from the inner retaining strip 502 and the outer retaining strip 501, so that when the bearing plate 7 is placed from top to bottom, it can press down the pressing strip 19 and the lifting plate 21.

Claims

1. A secondary roasting device for the production of graphite electrodes, comprising a furnace body and two slide rails arranged on one side of the furnace body. A bottom plate is slidably assembled on the slide rails. Outer retaining strips are fixedly connected to both sides of the top of the bottom plate, and inner retaining strips are arranged at the inner positions of the outer retaining strips. A bearing plate is arranged above the outer retaining strips and the inner retaining strips, and the bearing plate can be pushed to move by push rods at the tops of the outer retaining strips and the inner retaining strips. It is characterized in that: A guide block is fixedly installed on the bottom surface of the push rod, and the guide block slides between the two inner retaining strips; A secondary steel cable is arranged between the two slide rails, and a reversing assembly is arranged between the two inner retaining strips, and the reversing assembly can be clamped with the inner retaining strips. One end of the secondary steel cable is fixedly connected to the surface of the guide block close to the reversing assembly. The other end of the secondary steel cable extends to the pulley at the end of the slide rail after bypassing the reversing assembly, and finally bypasses the pulley and extends in the direction away from the furnace body. When the connection between the reversing assembly and the inner retaining strip is disengaged, the secondary steel cable can push the bearing plate into the furnace body through the push rod during the process of pulling the reversing assembly to move synchronously.

2. The secondary roasting device for producing graphite electrodes according to claim 1, wherein: The reversing assembly includes a reversing shaft arranged between the two inner retaining strips. Connecting blocks are rotatably installed at both ends of the reversing shaft. The secondary steel cable bypasses the outside of the reversing shaft. A clamping block is elastically connected to the side surface of the connecting block close to the inner retaining strip. Through slots are formed in the inner retaining strip. Bevels are arranged on both sides of the end of the clamping block close to the inner retaining strip. When the bevels are completely inserted into the through slots, the clamping block is locked with the inner retaining strip.

3. The secondary roasting device for the production of graphite electrodes according to claim 2, wherein: A pressure rod is elastically connected in the through slot. An inclined extrusion surface is arranged at the end of the pressure rod outside the through slot. A lifting plate is arranged between the inner retaining strip and the outer retaining strip. The lifting plate is elastically connected to the bottom plate. The lifting plate can contact the inclined extrusion surface on the pressure rod during the process of moving downward, so as to push the pressure rod. A pressure strip is hinged to the top surface of the lifting plate. In the initial state, the pressure strip is in a vertical state.

4. The secondary roasting device for producing graphite electrodes according to claim 3, characterized in that: A notch is formed on the inner side surface of the inner retaining strip. The notch is located at the end of the inner retaining strip close to the furnace body. A limiting block matched with the notch is elastically connected to the surface of the guide block close to the inner retaining strip. The end of the limiting block located inside the notch is an arc surface.

5. The secondary roasting device for the production of graphite electrodes according to claim 4, characterized in that: A support rod is hinged to the push rod. A hook plate is rotatably connected to the bottom surface of the support rod. In the initial state, the hook plate is in a vertical state and can only deflect inward relative to the support rod. A connection slot matched with the hook plate is formed on the bearing plate.

6. The secondary roasting device for the production of graphite electrodes according to claim 1, characterized in that: A top rod is threadedly connected to the push rod.

7. The secondary roasting device for producing graphite electrodes according to claim 1, characterized in that: Front stop blocks and rear stop blocks are respectively fixed at both ends on the top of the slide rail.

8. The secondary roasting device for the production of graphite electrodes according to claim 5, characterized in that: A convex part extends upward from one side of the top of the hook plate. When the hook plate is in a vertical state, the top surface of the convex part can contact the bottom surface of the support rod.

9. The secondary roasting device for the production of graphite electrodes according to claim 5, characterized in that: A groove matched with the support rod is formed on the push rod. The end of the support rod away from the hook plate is rotatably connected in the groove.

10. A method of roasting using a secondary roasting device for the production of graphite electrodes as described in claim 5, characterized in that, The following steps are included: pulling the bottom plate to one side of the furnace body through the secondary steel cable. When the hook plate is matched with the connection slot, the secondary steel cable can pull the push rod to move the bearing plate out of the furnace body; when the bearing plate is placed on the tops of the inner retaining strip and the outer retaining strip from top to bottom, the clamping connection relationship between the reversing assembly and the inner retaining strip is released. When the secondary steel cable drives the bottom plate to move to one side of the furnace body, the secondary steel cable can drive the reversing assembly to move synchronously, so as to push the bearing plate into the furnace body.

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