Rotary positioning device for furnace end of self-consuming vacuum furnace

Abstract

The invention relates to a rotary positioning device for a furnace end of a vacuum consumable electrode furnace. A plurality of buffer devices are fixed on a station box body of the consumable electrode furnace through bolts; an inner ring of the slewing bearing is fixed on the upper end surface of the connecting flange of the consumable furnace station box body; a consumable furnace rotating stand column support is fixed to the upper end face of the outer ring of the slewing bearing through bolts; a driving slewing device is arranged on one side of the slewing bearing on the self-consuming furnace station box body; the driving slewing device drives the slewing bearing to drive the consumable electrode furnace rotating stand column support to rotate, and when the consumable electrode furnace rotating stand column support makes contact with one buffer device, the consumable electrode furnace rotating stand column support stops rotating. The buffer devices are arranged at the limiting positions of the two sides of the furnace end rotary positioning device, impact kinetic energy generated when the furnace end rotates to the limiting positions is absorbed through the buffer devices, impact force between the furnace end and the rotary positioning device is eliminated, stable operation is ensured, and the working reliability of equipment is improved.

Description

Technical Field

[0001] An embodiment of the present invention relates to a rotary positioning device in the technical field of vacuum consumable furnaces, and particularly to a rotary positioning device for the furnace head of a vacuum consumable furnace. Background Art

[0002] During the operation of the existing vacuum consumable furnace, the furnace head needs to be periodically rotated and switched between two work positions. That is: after remelting is completed, first rotate and switch the furnace head from one side work position to the other side work position; then after remelting is completed at the original work position, the ingot is taken out of the furnace, a new ingot mold is installed, and a new base material is hoisted in; then rotate and switch the furnace head from the other side work position to the original work position; finally, clamp the new base material electrode and start the next round of consumable remelting cycle. In this way, the vacuum consumable furnace performs the above various operations cyclically to meet the smelting production requirements on site.

[0003] The traditional furnace head rotary positioning device adopts a combination of proximity sensor signal sensing and bolt hard limit. When the furnace head rotates into the sensing range of the proximity sensor, the control system issues an instruction to stop the rotation of the furnace head. Due to the moving inertia of the furnace head, it will continue to rotate a certain angle and hit the bolt hard limit, generating a certain impact force, which affects the working stability of the furnace head and even affects the smooth operation of the entire vacuum consumable furnace. At the same time, during the design of the furnace head positioning device, in order to match vacuum consumable furnaces of different tonnages, different types of positioning devices need to be selected, making the design and selection work very complicated. Summary of the Invention

[0004] The purpose of the embodiment of the present invention is to provide a rotary positioning device for the furnace head of a vacuum consumable furnace, which is provided with buffer devices at both limit positions of the furnace head rotary positioning device, uses the buffer devices to absorb the impact kinetic energy when the furnace head rotates to the limit position, eliminates the impact force between the furnace head and the rotary positioning device, and can match the application conditions of self-consumable furnaces of different tonnages.

[0005] In order to achieve the above purpose, the embodiment of the present invention designs a rotary positioning device for the furnace head of a vacuum consumable furnace, including:

[0006] A consumable furnace work position box body;

[0007] Buffer devices, and a plurality of the buffer devices are fixed on the consumable furnace work position box body by bolts;

[0008] A slewing bearing, and the inner ring of the slewing bearing is fixed on the upper end surface of the connecting flange of the consumable furnace work position box body;

[0009] A consumable furnace rotary column support, and the consumable furnace rotary column support is fixed on the upper end surface of the outer ring of the slewing bearing by bolts;

[0010] The driving and rotating device is arranged on one side of the slewing bearing on the self-consumable furnace station box body; the driving and rotating device drives the slewing bearing to drive the rotating column bracket of the self-consumable furnace to rotate. When the rotating column bracket of the self-consumable furnace touches one of the buffer devices, the rotating column bracket of the self-consumable furnace stops rotating.

[0011] Furthermore, in the vacuum consumable furnace hearth rotation and positioning device of the present invention, two buffer devices are fixed above the self-consumable furnace station box body on both sides of the rotating column bracket of the self-consumable furnace.

[0012] Furthermore, in the vacuum consumable furnace hearth rotation and positioning device of the present invention, the buffer devices are symmetrically distributed along the central axis of the self-consumable furnace station box body.

[0013] Furthermore, in the vacuum consumable furnace hearth rotation and positioning device of the present invention, the buffer device further includes:

[0014] A buffer seat plate, which is fixed to the buffer bracket by bolts;

[0015] A buffer, which is fixedly connected to the buffer seat plate by thread fit;

[0016] During the rotation of the vacuum consumable furnace hearth, the buffer head on the buffer directly contacts the bottom plate of the rotating column bracket of the self-consumable furnace, absorbing the impact kinetic energy when the bottom plate of the rotating column bracket of the self-consumable furnace rotates to the limit position, so as to eliminate the impact force during the rotation of the rotating column bracket of the self-consumable furnace;

[0017] A proximity sensor bracket, which is fixed to the buffer bracket by bolts;

[0018] A proximity sensor, which is fixedly connected to the proximity sensor bracket by thread; by changing the extension length of the proximity sensor, the signal sensing position of the proximity sensor is adjusted;

[0019] A hard limit bolt, which is fixed to the buffer bracket by a lock nut; by changing the extension length of the hard limit bolt, the rotation limit position of the bottom plate of the rotating column bracket of the self-consumable furnace corresponding to the hard limit bolt is adjusted;

[0020] A buffer force adjustment knob, which is fixed to the buffer.

[0021] Furthermore, in the vacuum consumable furnace hearth rotation and positioning device of the present invention, the driving and rotating device further includes:

[0022] A rotary reducer mounting plate, which is fixed on the consumable furnace station box;

[0023] A slewing reducer, the slewing reducer is fixed on the slewing reducer mounting plate by bolts;

[0024] A pneumatic motor is fixedly connected to the input end of the rotary reducer;

[0025] Pagoda air connector, two of the pagoda air connectors are connected to the pneumatic motor;

[0026] An electromagnetic pneumatic valve, wherein the pagoda air connector is connected to the electromagnetic pneumatic valve via an air pipe;

[0027] The driving sprocket is fixedly connected to the output shaft of the rotary reducer by a locking screw to transmit the torque from the rotary reducer to the driving sprocket;

[0028] A driving chain is mounted on the teeth of the driving sprocket, and both ends of the driving chain are respectively passed around the outer cylindrical surface of the outer ring on the slewing bearing and connected to the two pull rod devices; through the connection of the driving chain, the torque is transmitted from the driving sprocket to the slewing bearing.

[0029] Furthermore, in the vacuum consumable furnace furnace head rotation positioning device described in the present invention, the output shaft of the pneumatic motor is coaxially connected to the input shaft of the rotary reducer, and the torque is transmitted from the pneumatic motor to the rotary reducer.

[0030] Furthermore, in the vacuum consumable furnace furnace head rotation positioning device of the present invention, the electromagnetic pneumatic valve is connected to the PLC controller through a control line; the PLC controller sends a forward, stop, or reverse signal to switch and control the electromagnetic pneumatic valve. The electromagnetic pneumatic valve controls the forward, stop, or reverse action switching of the pneumatic motor by changing the on / off and flow direction of the compressed air in the air circuit.

[0031] Furthermore, in the vacuum consumable furnace furnace head rotation positioning device described in the present invention, an adjustment scale is set on the buffer force adjustment knob, and the buffer force of the buffer is changed by changing the buffer force adjustment knob to a corresponding scale.

[0032] Furthermore, in the vacuum consumable furnace furnace head rotation positioning device described in the present invention, the vacuum consumable furnace furnace head is placed on the vacuum consumable furnace furnace head rotation positioning device.

[0033] Compared with the prior art, in the embodiment of the present invention, a plurality of buffer devices are fixed on the consumable furnace station box body by bolts; the inner ring of the slewing bearing is fixed on the upper end face of the connecting flange of the consumable furnace station box body; the outer ring upper end face of the slewing bearing is fixed with a consumable furnace rotating column bracket by bolts; on the consumable furnace station box body, a driving slewing device is arranged on one side of the slewing bearing; the driving slewing device drives the slewing bearing to drive the consumable furnace rotating column bracket to rotate. When the consumable furnace rotating column bracket touches one of the buffer devices, the consumable furnace rotating column bracket stops rotating. Buffer devices are provided at both limit positions on both sides of the furnace head rotation positioning device, realizing the use of the buffer device to absorb the impact kinetic energy when the furnace head rotates to the limit position, eliminating the impact force between the furnace head and the rotation positioning device, ensuring the stable operation of the furnace head and the entire vacuum consumable furnace, and improving the working reliability of the equipment. At the same time, for the convenience of design and selection, the vacuum consumable furnace furnace head rotation positioning device provided by the present invention can match the application conditions of consumable furnaces of different tonnages.

[0034] Compared with the prior art, the embodiment of the present invention solves the technical problems that the traditional furnace head rotation positioning device adopts a combination of proximity sensor signal sensing and bolt hard limit. When the furnace head rotates into the sensing range of the proximity sensor, the control system issues an instruction to stop the rotation of the furnace head. Due to the movement inertia of the furnace head, it will continue to rotate a certain angle and hit the bolt hard limit, generating a certain impact force, which affects the stability of the furnace head operation and even affects the smooth operation of the entire vacuum consumable furnace. At the same time, it solves the technical problem that in the design process of the furnace head positioning device, in order to match vacuum consumable furnaces of different tonnages, different types of positioning assemblies need to be selected, making the design and selection work very complicated. Brief Description of the Drawings

[0035] Figure 1 is the front view of the present invention;

[0036] Figure 2 is the top view of the present invention;

[0037] Figure 3 is the left view of the present invention;

[0038] Figure 4 is the front view of the buffer device in the present invention;

[0039] Figure 5 is the top view of the buffer device in the present invention.

[0040] In the figure: 1 - buffer device, 2 - consumable furnace rotating column support, 3 - drive chain, 4 - drive sprocket, 5 - pneumatic motor, 51 - pagoda air joint, 6 - slewing speed reducer, 7 - consumable furnace station box, 71 - slewing speed reducer mounting plate, 8 - tie rod device, 9 - slewing bearing, 10 - electromagnetic pneumatic valve, 11 - PLC controller, 100 - drive slewing device, 101 - buffer, 102 - proximity sensor bracket, 103 - proximity sensor, 104 - hard limit bolt, 105 - buffer force adjustment knob, 106 - buffer seat plate, 107 - buffer bracket. Specific embodiments

[0041] To make the objectives, technical solutions and advantages of the present invention clearer, the following will elaborate on each embodiment of the present invention in conjunction with the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the present invention, many technical details are provided to help readers better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in each claim of the present application can still be implemented.

[0042] The embodiments of the present invention relate to a rotary positioning device for the furnace head of a vacuum consumable furnace, as Figures 1-5 shown, including:

[0043] In this embodiment, the consumable furnace station box 7 serves as the base of the rotary positioning device for the furnace head of the vacuum consumable furnace in this embodiment;

[0044] A number of buffer devices 1 are fixed on the consumable furnace station box 7 by bolts; the buffer devices 1 are used for buffering;

[0045] The inner ring of the slewing bearing 9 is fixed on the upper end face of the connecting flange of the consumable furnace station box 7; the slewing bearing 9 is used for rotating the furnace head of the vacuum consumable furnace;

[0046] The consumable furnace rotating column support 2 is fixed on the upper end face of the outer ring of the slewing bearing 9 by bolts; the consumable furnace rotating column support 2 is used for placing the rotating furnace head of the vacuum consumable furnace;

[0047] The drive slewing device 100 is arranged on the consumable furnace station box 7 on one side of the slewing bearing 9; the drive slewing device 100 drives the slewing bearing 9 to drive the consumable furnace rotating column support 2 to rotate. When the consumable furnace rotating column support 2 touches one of the buffer devices 1, the consumable furnace rotating column support 2 stops rotating.

[0048] The vacuum consumable furnace hearth rotation and positioning device in this embodiment realizes absorbing the impact kinetic energy when the hearth rotates to the limit position by means of a buffer device, eliminating the impact force between the hearth and the rotation and positioning device, ensuring the stable operation of the hearth and the entire vacuum consumable furnace, and improving the working reliability of the equipment. At the same time, for the convenience of design and selection, the vacuum consumable furnace hearth rotation and positioning device provided in this embodiment can match the application conditions of consumable furnaces with different tonnages. It solves the technical problem in the prior art that the traditional hearth rotation and positioning device adopts a combination of proximity sensor signal sensing and bolt hard limit. When the hearth rotates into the sensing range of the proximity sensor, the control system issues an instruction to stop the hearth rotation. Due to the movement inertia of the hearth, it will continue to rotate a certain angle and hit the bolt hard limit, generating a certain impact force, affecting the stability of the hearth operation and even the smooth operation of the entire vacuum consumable furnace. At the same time, it solves the technical problem that during the design process of the hearth positioning device, in order to match vacuum consumable furnaces with different tonnages, different types of positioning assemblies need to be selected, making the design and selection work very complicated.

[0049] To achieve the above technical effects, the vacuum consumable furnace hearth rotation and positioning device in this embodiment, as Figures 1-5 shown, on both sides of the consumable furnace rotating column support 2, two buffer devices 1 are fixed above the consumable furnace working station box 7. The two buffer devices 1 are symmetrically distributed along the central axis of the consumable furnace working station box 7, each corresponding to the limit position of the hearth rotation on each side of the working station. During the hearth rotation, the buffer device 1 can absorb the impact kinetic energy when the hearth rotates to the limit position, so as to eliminate the impact force between the hearth and the rotation positioning mechanism, ensure the stable operation of the hearth and the entire vacuum consumable furnace, and improve the reliability of the equipment.

[0050] To achieve the above technical effects, the vacuum consumable furnace hearth rotation and positioning device in this embodiment, as Figures 1-5 shown, the buffer device 1 further includes:

[0051] A buffer seat plate 106 is fixed on the buffer support 107 by bolts;

[0052] A buffer 101 is fixedly connected and fixed on the buffer seat plate 106 by thread fitting;

[0053] During the rotation of the vacuum consumable furnace hearth, the buffer head on the buffer 101 directly contacts the bottom plate of the consumable furnace rotating column support 2, absorbing the impact kinetic energy when the bottom plate of the consumable furnace rotating column support 2 rotates to the limit position, so as to eliminate the impact force during the rotation of the consumable furnace rotating column support 2;

[0054] A proximity sensor support 102 is fixed on the buffer support 107 by bolts;

[0055] The proximity sensor 103 is fixedly connected to the proximity sensor bracket 102 by threading; by changing the protruding length of the proximity sensor 103, the signal sensing position of the proximity sensor 103 is adjusted;

[0056] The hard limit bolt 104 is fixed to the buffer bracket 107 by a lock nut; by changing the protruding length of the hard limit bolt 104, the rotational limit position of the bottom plate of the consumable furnace rotating column bracket 2 corresponding to the hard limit bolt 104 is adjusted;

[0057] The buffer force adjustment knob 105 is fixed to the buffer 101. The buffer force adjustment knob 105 is used to adjust the buffer force of the buffer 101.

[0058] In this embodiment, the buffer 101 is fixedly connected to the buffer seat plate 106 by threading. The buffer seat plate 106 is fixed to the buffer bracket 107 by bolts. During the rotation of the furnace head, the buffer head of the buffer 101 directly contacts the bottom plate of the consumable furnace rotating column bracket 2, and absorbs the impact kinetic energy when the bottom plate of the consumable furnace rotating column bracket 2 rotates to the limit position, so as to eliminate the impact force between the consumable furnace rotating column bracket 2 and the rotation positioning mechanism.

[0059] The proximity sensor 103 is fixedly connected to the proximity sensor bracket 102 by threading. The proximity sensor bracket 102 is fixed to the buffer bracket 107 by bolts. By changing the protruding length of the proximity sensor 103, the signal sensing position of the proximity sensor 103 can be adjusted. During the rotation of the furnace head, when the bottom plate of the consumable furnace rotating column bracket 2 rotates into the signal sensing range of the proximity sensor 103, the proximity sensor 103 immediately sends a furnace head rotation in-place signal to the PLC controller 11, and the PLC controller 11 immediately sends a drive instruction to the electromagnetic pneumatic valve 10 to cut off the air flow in the air path, so that the pneumatic motor 5 stops rotating.

[0060] The hard limit bolt 104 is fixed to the buffer bracket 107 by a lock nut. By changing the protruding length of the hard limit bolt 104, the rotational limit position of the bottom plate of the consumable furnace rotating column bracket 2 corresponding to the hard limit bolt 104 can be adjusted.

[0061] The buffer force adjustment knob 105 is located at the upper end of the large cylindrical surface of the buffer 101 and is provided with corresponding adjustment scales. According to the tonnage grade of the vacuum consumable furnace for actual application, it can meet the selection and use of vacuum consumable furnaces with a tonnage of 0.5 tons to 30 tons. By changing the buffer force adjustment knob 105 to the corresponding scale, the buffer force of the buffer 101 can be changed accordingly, so that the furnace head rotation positioning device of the vacuum consumable furnace works in the best state and meets the needs of various tonnage working conditions on site.

[0062] To achieve the above technical effects, the rotary positioning device for the consumable electrode vacuum arc furnace head in this embodiment, as shown in Figures 1-5 includes a driving slewing device 100, which further comprises:

[0063] A slewing reducer mounting plate 71 is fixed on the consumable electrode furnace station box body 7;

[0064] A slewing reducer 6 is fixed on the slewing reducer mounting plate 71 by bolts;

[0065] An air motor 5 is fixedly connected to the input end of the slewing reducer 6; the air motor 5 drives the slewing reducer 6 to rotate.

[0066] Two taper gas connectors 51 are connected to the air motor 5; the taper gas connectors 51 are used to connect to the gas source.

[0067] The taper gas connectors 51 are connected to an electromagnetic pneumatic valve 10 through air pipes; the electromagnetic pneumatic valve 10 controls the on-off and flow direction of compressed air in the gas circuit.

[0068] A driving sprocket 4 is fixedly connected to the output shaft of the slewing reducer 6 by a locking screw, transmitting the torque from the slewing reducer 6 to the driving sprocket 4;

[0069] A driving chain 3 is sleeved on the teeth of the driving sprocket 4, and both ends of the driving chain 3 respectively bypass the outer cylindrical surface of the outer ring of the slewing bearing 9 and are connected to two pull rod devices 8; through the connection of the driving chain 3, the torque is transmitted from the driving sprocket 4 to the slewing bearing 9.

[0070] The consumable electrode furnace rotary column support 2 is fixed on the upper end face of the outer ring of the slewing bearing 9 by bolts. During the working process, the consumable electrode furnace rotary column support 2 can rotate together with the outer ring of the slewing bearing 9 and drive the furnace head to rotate together, realizing the back-and-forth switching of the furnace head between two stations.

[0071] The inner ring of the slewing bearing 9 is fixed on the upper end face of the special connection flange of the consumable electrode furnace station box body 7 by bolts.

[0072] The air motor 5 is fixed on the input end of the slewing reducer 6 by bolts. The output shaft of the air motor 5 is coaxially connected to the input shaft of the slewing reducer 6, realizing the transmission of torque from the air motor 5 to the slewing reducer 6. The two taper gas connectors on the air motor 5 are connected to the electromagnetic pneumatic valve 10 through air pipes, and the electromagnetic pneumatic valve 10 is connected to a PLC controller 11 through a control line. The PLC controller 11 sends forward rotation, stop, and reverse switching signals to the electromagnetic pneumatic valve 10 for corresponding actions. The electromagnetic pneumatic valve 10 changes the on-off and flow direction of compressed air in the gas circuit, realizing the action switching of forward rotation, stop, and reverse of the air motor 5.

[0073] The slewing reducer 6 is fixed on the slewing reducer mounting plate 71 by bolts.

[0074] The driving sprocket 4 is fixed on the output shaft of the slewing speed reducer 6 by a locking screw, realizing the transmission of torque from the slewing speed reducer 6 to the driving sprocket 4.

[0075] The driving chain 3 is sleeved on the teeth of the driving sprocket 4, and both ends respectively bypass the outer cylindrical surface of the outer ring of the slewing bearing 9 and are connected to two pull rod devices 8. Through the connection of the driving chain 3, the transmission of torque from the driving sprocket 4 to the slewing bearing 9 is realized, and then the torque is transmitted to the consumable furnace rotating column bracket 2, driving the furnace head to realize the action switching of forward rotation, stop, and reverse rotation.

[0076] In order to achieve the above technical effects, the vacuum consumable furnace furnace head rotation positioning device in this embodiment, as Figures 1-5 shown, place the vacuum consumable furnace furnace head on the vacuum consumable furnace furnace head rotation positioning device, and the furnace head can rotate together with the consumable furnace rotating column bracket 2.

[0077] In this embodiment:

[0078] 1) When the vacuum consumable furnace completes a remelting cycle, first rotate and switch the vacuum consumable furnace furnace head from one side station to the other side station; then after remelting at the original station, the ingot is taken out of the furnace, a new ingot mold is installed, and a new base material is lifted in; then rotate and switch the furnace head from the other side station to the original station; finally, clamp the new base material electrode and start the next round of consumable remelting cycle. In this way, the vacuum consumable furnace performs the above various operations cyclically, meeting the on-site smelting production requirements and obtaining the required high-end steel grades.

[0079] 2) During the above production operation process, the vacuum consumable furnace furnace head needs to perform periodic rotation switching between two stations. When the bottom plate of the consumable furnace rotating column bracket 2 rotates to the signal sensing range of the proximity sensor 103 each time, the proximity sensor 103 immediately sends a furnace head rotation in-place signal to the PLC controller 11, and the PLC controller 11 immediately sends a driving instruction to the electromagnetic pneumatic valve 10 to cut off the air flow in the air circuit, stopping the pneumatic motor 5 from rotating.

[0080] 3) Due to the movement inertia of the vacuum consumable furnace furnace head, the bottom plate of the consumable furnace rotating column bracket 2 will continue to rotate a certain angle together with the vacuum consumable furnace furnace head and hit the buffer device 1. At this time, the buffer head of the buffer 101 of the buffer device 1 directly contacts the bottom plate of the consumable furnace rotating column bracket 2, absorbing the rotational kinetic energy of the consumable furnace rotating column bracket 2 (together with the vacuum consumable furnace furnace head), avoiding the direct impact of the bottom plate of the consumable furnace rotating column bracket 2 on the hard limit bolt 104, that is, eliminating the impact force between the consumable furnace rotating column bracket 2 (together with the vacuum consumable furnace furnace head) and the rotation positioning device, ensuring the stable operation of the furnace head and the entire vacuum consumable furnace, and improving the reliability of the equipment.

[0081] Those of ordinary skill in the art can understand that the above embodiments are specific examples for implementing the present invention, and in practical applications, various changes can be made to them in form and details without departing from the spirit and scope of the present invention.

Claims

1. A rotary positioning device for the hearth of a vacuum consumable furnace, characterized in that, Including: Consumable furnace station box body (7); Buffer device (1), several of the buffer devices (1) are fixed on the consumable furnace station box body (7) by bolts; Slewing bearing (9), the inner ring of the slewing bearing (9) is fixed on the upper end face of the connecting flange of the consumable furnace station box body (7); Consumable furnace rotating column bracket (2), the consumable furnace rotating column bracket (2) is fixed on the upper end face of the outer ring of the slewing bearing (9) by bolts; Driving slewing device (100), on the consumable furnace station box body (7), the driving slewing device (100) is arranged on one side of the slewing bearing (9); the driving slewing device (100) drives the slewing bearing (9) to drive the consumable furnace rotating column bracket (2) to rotate. When the consumable furnace rotating column bracket (2) touches one of the buffer devices (1), the consumable furnace rotating column bracket (2) stops rotating.

2. The vacuum consumable furnace hearth rotation and positioning device according to claim 1, wherein, On both sides of the consumable furnace rotating column bracket (2), 2 of the buffer devices (1) are fixed above the consumable furnace station box body (7).

3. The vacuum consumable furnace hearth rotation and positioning device according to claim 2, wherein The buffer devices (1) are symmetrically distributed along the central axis of the consumable furnace station box body (7).

4. The vacuum consumable furnace hearth rotation and positioning device according to claim 1, characterized in that, The buffer device (1) further includes: Buffer seat plate (106), the buffer seat plate (106) is fixed on the buffer bracket (107) by bolts; Buffer (101), the buffer (101) is fixed on the buffer seat plate (106) by threaded fit connection; During the rotation of the consumable furnace head of the vacuum consumable furnace, the buffer head on the buffer (101) directly contacts the bottom plate of the consumable furnace rotating column bracket (2) to absorb the impact kinetic energy when the bottom plate of the consumable furnace rotating column bracket (2) rotates to the limit position, so as to eliminate the impact force during the rotation of the consumable furnace rotating column bracket (2); Proximity sensor bracket (102), the proximity sensor bracket (102) is fixed on the buffer bracket (107) by bolts; Proximity sensor (103), the proximity sensor (103) is fixedly connected to the proximity sensor bracket 102 by threads; by changing the extension length of the proximity sensor (103), the signal sensing position of the proximity sensor (103) is adjusted; Hard limit bolt (104), the hard limit bolt (104) is fixed on the buffer bracket (107) by a locking nut; by changing the extension length of the hard limit bolt (104), the rotation limit position of the bottom plate of the consumable furnace rotating column bracket (2) corresponding to the hard limit bolt (104) is adjusted; Buffer force adjustment knob (105), the buffer force adjustment knob (105) is fixed on the buffer (101).

5. The vacuum consumable furnace hearth rotation and positioning device according to claim 1, characterized in that, The driving slewing device (100) further includes: Slewing reducer mounting plate (71), the slewing reducer mounting plate (71) is fixed on the consumable furnace station box body 7; Slewing reducer (6), the slewing reducer (6) is fixed on the slewing reducer mounting plate (71) by bolts; A pneumatic motor (5) is fixedly connected to the input end of the rotary speed reducer (6). Two taper gas connectors (51) are connected to the pneumatic motor (5). A solenoid pneumatic valve (10), and the taper gas connector (51) is connected to the solenoid pneumatic valve (10) through an air pipe. The drive sprocket (4) is fixedly connected to the output shaft of the rotary speed reducer (6) by a locking screw, and the torque is transmitted from the rotary speed reducer (6) to the drive sprocket (4). A drive chain (3) is sleeved on the teeth of the drive sprocket (4). The two ends of the drive chain (3) respectively bypass the outer cylindrical surface of the outer ring on the slewing bearing (9) and are connected to the two pull rod devices (8). Through the connection of the drive chain (3), the torque is transmitted from the drive sprocket (4) to the slewing bearing (9).

6. The vacuum consumable furnace hearth rotation and positioning device according to claim 5, characterized in that, The output shaft of the pneumatic motor (5) is coaxially connected to the input shaft of the rotary speed reducer (6), and the torque is transmitted from the pneumatic motor 5 to the rotary speed reducer 6.

7. The vacuum consumable furnace hearth rotation and positioning device according to claim 5, characterized in that, The solenoid pneumatic valve (10) is connected to the PLC controller (11) through a control line; the PLC controller (11) issues signals of forward rotation, stop, and reverse rotation to switch and control the solenoid pneumatic valve (10).

8. The vacuum consumable furnace hearth rotation and positioning device according to claim 4, characterized in that, Adjustment scales are set on the buffer force adjustment knob (105). By changing the buffer force adjustment knob (105) to the corresponding scale, the buffer force of the buffer (101) is changed.

9. The vacuum consumable furnace hearth rotation and positioning device according to claim 5, characterized in that, The PLC controller (11) issues switching signals of forward rotation, stop, and reverse rotation to the solenoid pneumatic valve 10; the solenoid pneumatic valve (10) controls the action switching of forward rotation, stop, and reverse rotation of the pneumatic motor (5) by changing the on-off and flow direction of the compressed air in the air circuit.

10. The vacuum consumable furnace hearth rotation and positioning device according to any one of claims 1-9, characterized in that, Place the vacuum consumable furnace head on the rotary positioning device of the vacuum consumable furnace head.

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