Atmosphere electric slag furnace with furnace leg pneumatic clamping device

Abstract

The utility model relates to a kind of protective atmosphere electroslag furnace with furnace leg pneumatic clamping device, gas cylinder telescopic component is set in the lower of upper furnace leg;Lower furnace leg is set in the lower of upper furnace leg;Pneumatic clamping component is set in the upper of lower furnace leg;Gas cylinder telescopic component is through telescopic to pneumatic clamping component;Pneumatic clamping component clamps gas cylinder telescopic component, connects or disconnects the large current passage between upper furnace leg and lower furnace leg.Compared with the furnace leg clamping system of traditional single furnace head double-station rotary gas-protected electroslag furnace, the above problems are solved by adopting cylinder clamping mode and position encoder positioning mode, which has the advantages of low investment cost, high positioning accuracy, safe and reliable operation, convenient maintenance, good environmental compatibility and other advantages, solves the technical problems of traditional single furnace head double-station rotary electroslag furnace, such as complex sealing system, difficult leakage maintenance, large space occupation, high investment cost, poor environmental compatibility, large positioning error, low control accuracy and low production efficiency.

Description

Technical Field

[0001] The embodiments of this utility model relate to the technical field of gas-protected electroslag furnaces, and particularly to a protective atmosphere electroslag furnace with a pneumatic clamping device for furnace legs. Background Technology

[0002] Traditional single-head, dual-station rotary electroslag furnaces rely on a hydraulic system for the connection and separation of the upper and lower furnace legs. This requires a hydraulic station, resulting in a complex sealing system and difficult maintenance due to leaks. The hydraulic system also necessitates a hydraulic oil tank and cooling system, occupying significant space and incurring high costs. Furthermore, the risk of hydraulic oil leakage can easily contaminate the protective atmosphere of the electroslag furnace and potentially pollute the smelting environment, affecting the purity of the smelted alloy and exhibiting poor environmental compatibility.

[0003] In a single-head, dual-station rotary electroslag furnace, the upper furnace leg periodically switches between the two stations along with the furnace head. The vertical positioning between the upper and lower furnace legs relies solely on the signal sensing of limit switches, resulting in large positioning errors, low control precision, and the need for manual adjustments on-site, leading to low production efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a protective atmosphere electroslag furnace with a pneumatic clamping device for furnace legs, which has low investment cost, high positioning accuracy, safe and reliable operation, convenient system maintenance, and good environmental compatibility.

[0005] To achieve the above objectives, the first embodiment of this utility model designs a pneumatic clamping device for furnace legs, which further includes: Stove legs; A cylinder telescopic component is provided below the upper furnace leg; Lower furnace leg; the lower furnace leg is provided below the upper furnace leg; A pneumatic clamping component is provided above the lower furnace leg; a cylinder telescopic component extends and retracts to the pneumatic clamping component; the pneumatic clamping component clamps the cylinder telescopic component, connecting or disconnecting the high current channel between the upper and lower furnace legs.

[0006] Furthermore, in the aforementioned pneumatic clamping device for furnace legs, the cylinder extension component further includes: A furnace leg conductive connecting block is located below the upper furnace leg and is fastened to the bottom end of the upper furnace leg by bolts. An insulating sleeve is located below the conductive connecting block of the furnace leg, and the through hole on the insulating sleeve is coaxial with the through hole on the conductive connecting block of the furnace leg; the insulating sleeve is fastened to the conductive connecting block of the furnace leg by bolts. A cylinder mounting plate is located near the lower end of the upper furnace leg and is fastened to the upper furnace leg by the clamp. A clamping cylinder is mounted on a cylinder mounting plate and fastened to the cylinder mounting plate by bolts; A cylinder insulating pad, which is located and clamped between the cylinder mounting plate and the clamping cylinder; The clamping cylinder includes the cylinder body and the cylinder piston rod.

[0007] Furthermore, in the aforementioned pneumatic clamping device for furnace legs, the pneumatic clamping component further includes: A cylinder connecting shaft is located directly below the cylinder piston rod of the cylinder telescopic component and passes through the through hole on the furnace leg conductive connecting block and the through hole on the insulating sleeve; the upper end of the cylinder connecting shaft is fastened to the lower end of the cylinder piston rod by a threaded connection. A conductive connecting block is located below the cylinder connecting shaft and directly above the copper conductive head of the lower furnace leg. The upper end of the conductive connecting block is fastened to the bottom end of the cylinder connecting shaft by bolts. The lower end of the conductive connecting block has a concave spherical structure. A conductive insulating plate, which is located and clamped between the cylinder connecting shaft and the conductive connecting block; A copper braided flexible wire is located below and above the conductive connecting block of the furnace leg. One end of the copper braided flexible wire is fastened to the lower surface of the conductive connecting block of the furnace leg by bolts, and the other end of the copper braided flexible wire is fastened to the symmetrically distributed connecting surfaces on both sides of the upper end of the conductive connecting block by bolts.

[0008] Furthermore, in the aforementioned pneumatic clamping device for furnace legs, when the cylinder piston rod extends or retracts, it drives the cylinder connecting shaft and the conductive connecting block to move downward or upward. When the cylinder piston rod extends, it drives the conductive connecting block to descend together. At this time, the concave spherical surface at the lower end of the conductive connecting block comes into contact with and matches the convex spherical surface at the upper end of the copper conductive head of the lower furnace leg, and is firmly clamped under the force of the cylinder. When the cylinder piston rod retracts, it causes the conductive connecting block to rise together. At this time, the lower concave spherical surface of the conductive connecting block separates from the upper convex spherical surface of the copper conductive head of the lower furnace leg.

[0009] Furthermore, in the aforementioned pneumatic clamping device for the furnace legs, the clamping cylinder (the lower end opposite the mounting surface of which is fixed with a cylinder extension position switch; when the clamping cylinder extends to the position, the cylinder extension position switch senses the signal and feeds it back to the PLC for logic control).

[0010] The cylinder retraction switch is located at the upper end of the opposite side of the clamping cylinder mounting surface; when the clamping cylinder retracts to its position, the cylinder retraction switch senses the signal and feeds it back to the PLC for logic control.

[0011] Furthermore, in the aforementioned pneumatic clamping device for the furnace leg, a second cooling water interface is fixed on one side of the lower end of the upper furnace leg, and the second cooling water interface is the cooling water inlet of the upper furnace leg; The first cooling water interface is fixed on the other side of the lower end of the upper furnace leg. The first cooling water interface is the cooling water outlet of the upper furnace leg. The fourth cooling water interface is provided on one side of the upper end of the conductive connecting block of the pneumatic clamping component. The fourth cooling water interface is the cooling water inlet of the conductive connecting block. The third cooling water interface is located on the other side of the upper end of the conductive connecting block, and the third cooling water interface is the cooling water outlet of the conductive connecting block.

[0012] A second embodiment of this utility model also provides a protective atmosphere electroslag furnace, characterized in that the protective atmosphere electroslag furnace further includes: The pneumatic clamping device for furnace legs described in the first embodiment; The furnace head, with the pneumatic clamping device for the furnace legs located below the furnace head and above the working platform; The upper end of the pneumatic clamping device for the furnace leg is connected and fixed to the upper furnace leg. When the furnace head rotates to the corresponding smelting position, the lower end of the pneumatic clamping device for the furnace leg docks with the upper end of the lower furnace leg. The upper furnace leg is fixed below the furnace head, the upper end of the upper furnace leg is connected and fixed to the furnace head, and the lower end of the upper furnace leg is connected to the furnace leg pneumatic clamping device. The lower furnace leg is provided below the upper furnace leg, and the bottom end of the lower furnace leg is fastened to the bottom of the smelting station of the protective atmosphere electroslag furnace by bolts; A copper conductive head for the lower furnace leg is located above the lower furnace leg and is fastened to the upper end face of the lower furnace leg by bolts. The upper end of the copper conductive head for the lower furnace leg has a convex spherical structure. The lower furnace leg auxiliary support is located on one side of the lower furnace leg and parallel to the lower furnace leg. The bottom end of the lower furnace leg auxiliary support is fastened to the bottom of the smelting station of the protective atmosphere electroslag furnace by bolts. The auxiliary support for the lower furnace leg is fastened to the side of the lower furnace leg by bolts; The burner head is located above the burner head rotary support; one end of the burner head is connected and supported by the burner head rotary support, and the other end of the burner head is connected and supported by the burner head rotary bracket; the burner head can move together with the burner head rotary bracket and drive the upper furnace leg to rotate back and forth around the rotating axis of the burner head rotary support. A furnace head rotation support is located above the working platform, and the base of the furnace head rotation support is fixed to the working platform by welding. A furnace head rotating support is located above the working platform. The upper end of the furnace head rotating support is connected and fixed to the other side of the furnace head, and the lower end of the furnace head rotating support is connected and fixed to the upper end of the active walking wheel assembly and the upper end of the driven walking wheel assembly, respectively.

[0013] Furthermore, the protective atmosphere electroslag furnace described in this embodiment includes four sets of pneumatic clamping devices for the furnace legs, which are evenly distributed around the central axis of the smelting station.

[0014] Furthermore, in this embodiment, the protective atmosphere electroslag furnace further includes: The working platform is welded and fixed to several platform support columns below, providing a workplace for the daily production operation of the protective atmosphere electroslag furnace; A rotary track is provided on the working platform in the area surrounding the first and second smelting stations.

[0015] An active traveling wheel assembly is located on the rotary track. The upper end of the active traveling wheel assembly is connected and fixed to the lower end of the furnace head rotary support. The active traveling wheel assembly can move back and forth along the rotary track.

[0016] The driven traveling wheel assembly is located on the rotary track. The upper end of the driven traveling wheel assembly is connected and fixed to the lower end of the furnace head rotary support. The driven traveling wheel assembly can move back and forth along the rotary track.

[0017] Furthermore, in this embodiment, the protective atmosphere electroslag furnace further includes: The first limit block is located near the outer side of the arc of the rotary track and corresponds to the projection position of the first limit switch on the working platform when the furnace head rotates to the left limit position of the first melting station. The second limit block is located near the outer side of the arc of the rotary track and corresponds to the projection position of the second limit switch on the working platform when the furnace head rotates to the right limit position of the second smelting station. A slewing limit mounting plate is located on the side of the driven travel wheel assembly; The first limit switch is located on the lower end of the rotary limit mounting plate, closer to the drive wheel assembly; the first limit switch is fixed to the rotary limit mounting plate by bolts; the first limit switch and the first limit stop block constitute the left limit hard limit of the furnace head rotation control; The second limit switch is located at the lower end of the rotary limit mounting plate on the side farther away from the drive wheel assembly. The second limit switch is fixed to the rotary limit mounting plate by bolts. The second limit switch and the second limit stop constitute the right limit hard limit of the furnace head rotation control; An encoder mounting plate is provided, which is positioned at the middle of the rotary limit mounting plate; the encoder mounting plate is fixed to the rotary limit mounting plate by bolts. An encoder is mounted on an encoder mounting plate. The encoder is fixed to the encoder mounting plate by bolts; the encoder shaft is coaxially connected to the shaft of the driven walking wheel assembly; when the furnace head rotates, the encoder feeds back rotation pulse signals to the PLC in real time, and the PLC accurately calculates and tracks the rotation position of the furnace head in real time. An encoder protective plate is provided, positioned slightly above the center of the rotary limit mounting plate. The encoder protective plate is fixed to the rotary limit mounting plate with bolts.

[0018] Compared with the prior art, the embodiment of this utility model features a cylinder telescopic component located below the upper furnace leg; a lower furnace leg located below the upper furnace leg; and a pneumatic clamping component located above the lower furnace leg. The cylinder telescopic component extends and retracts to the pneumatic clamping component, which then clamps the cylinder telescopic component, connecting or disconnecting the high-current channel between the upper and lower furnace legs. The aforementioned problems are solved by employing a cylinder clamping method and a position encoder positioning method. Compared with the traditional furnace leg clamping system of a single-head, dual-station rotary gas-insulated electroslag furnace, this invention offers several significant advantages: 1. Low investment cost: Driven by compressed air, it does not require a hydraulic station, resulting in low investment costs. In contrast, traditional protective atmosphere electroslag furnaces use hydraulic systems, which require a hydraulic station and cooling system, and the sealing system is complex, leading to high investment costs.

[0019] 2. High positioning accuracy: The control method combines position encoder positioning and soft limit setting of motion range, which ensures accurate positioning and convenient on-site debugging and adjustment.

[0020] 3. Safe and reliable operation: Limit switches are used as hard limits for movement range control. When the left and right limit soft limit settings fail due to various reasons, the furnace head rotation drive motor can be forced to stop moving, ensuring the safety of personnel operation and equipment operation.

[0021] 4. Convenient System Maintenance: Since no hydraulic pump station is required, only compressed air pipelines are needed. The system hardware is conveniently arranged in the surrounding three-dimensional space of the upper and lower furnace legs, resulting in a small footprint. The system composition is simple, and maintenance is easy and convenient.

[0022] 5. Good environmental compatibility: It is driven by compressed air, eliminating the risk of hydraulic oil leakage and avoiding contamination of the protective atmosphere of the electroslag furnace, which would affect the smelting environment and the purity of the smelted alloy.

[0023] The advantages mentioned above solve the problems of traditional single-head, dual-station rotary electroslag furnaces, where the connection and separation between the upper and lower furnace legs rely on a hydraulic system, requiring a hydraulic station, a complex sealing system, and significant difficulty in repairing leaks. The hydraulic system also requires a hydraulic oil tank and cooling system, resulting in large space requirements and high investment costs. Furthermore, the risk of hydraulic oil leakage can easily contaminate the protective atmosphere of the electroslag furnace and the smelting environment, affecting the purity of the smelted alloy and exhibiting poor environmental compatibility. The upper furnace leg periodically switches between the two stations along with the furnace head, and the vertical positioning between the upper and lower furnace legs relies solely on limit switch signals, leading to large positioning errors, low control precision, the need for manual adjustments on-site, and low production efficiency. Attached Figure Description

[0024] Figure 1 A partial front view of a frame-type gas-insulated electroslag furnace; Figure 2 This is a partial left view of a frame-type gas-insulated electroslag furnace. Figure 3 This is a partial front view of the furnace leg clamping system of this utility model; Figure 4 This is a partial right view of the furnace leg clamping system of this utility model; Figure 5 This is a top view of the furnace leg clamping system of this utility model; Figure 6 This is a partial AA cross-sectional view of the furnace leg clamping system of this utility model; Figure 7 This is a top view of the protective atmosphere electroslag furnace of this utility model. Figure 8This is a partial enlarged view along direction B of the protective atmosphere electroslag furnace of this utility model. Figure 9 This is a partially enlarged CC cross-sectional view of the protective atmosphere electroslag furnace of this utility model.

[0025] The reference numerals in the diagram are as follows: 1-Furnace leg clamping system, 101-Cylinder insulating pad, 102-Clamping cylinder, 102-1-Cylinder body, 102-2-Cylinder piston rod, 103-Insulating sleeve, 104-Cylinder connecting shaft, 105-Conductive insulating plate, 106-Conductive connecting block, 107-Copper braided wire, 108-Furnace leg conductive connecting block, 109-Clamping clamp, 110-Cylinder mounting plate, 111-Cylinder extension switch, 112-Second cooling water interface, 113-Fourth cooling water interface, 114-Third cooling water interface, 115-First cooling water interface, 116 - Cylinder retraction switch, 2- Furnace head, 3- Furnace head rotary support, 4- Upper furnace leg, 5- Lower furnace leg, 501- Lower furnace leg copper conductive head, 6- Working platform, 7- Active walking wheel set, 8- Driven walking wheel set, 9- Furnace head rotary bracket, 10- Lower furnace leg auxiliary support, 11- Second limit stop, 12- Rotary track, 13- Second limit switch, 14- First limit switch, 15- First limit stop, 16- Rotary limit mounting plate, 17- Encoder protective plate, 18- Encoder mounting plate, 19- Encoder, 40- Cylinder telescopic component, 50- Pneumatic clamping component. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of this application. However, the technical solutions claimed in the claims of this application can be implemented even without these technical details and with various variations and modifications based on the following embodiments.

[0027] The first embodiment of this utility model relates to a pneumatic clamping device for furnace legs, such as... Figures 1-6 As shown, it includes: In this embodiment, the furnace leg pneumatic clamping device is equipped with an upper furnace leg 4; A cylinder telescopic component 40 is provided below the upper furnace leg 4; A lower furnace leg 5 is installed below the upper furnace leg 4; A pneumatic clamping component 50 is installed above the lower furnace leg 5; the cylinder telescopic component 40 extends and retracts to the pneumatic clamping component 50; the pneumatic clamping component 50 clamps the cylinder telescopic component 40, connecting or disconnecting the high-current channel between the upper furnace leg 4 and the lower furnace leg 5. Compared with the furnace leg clamping system of the traditional single-burner dual-station rotary gas-insulated electroslag furnace, it has the following advantages: low investment cost: driven by compressed air, no hydraulic station is required, resulting in low investment cost. In contrast, the traditional protective atmosphere electroslag furnace uses a hydraulic system, which requires a hydraulic station and a hydraulic station cooling system, and the sealing system is complex, resulting in high investment cost; high positioning accuracy: it adopts a control method that combines position encoder positioning and soft limit setting of the movement range, resulting in accurate positioning and convenient on-site debugging and adjustment; safe and reliable operation: it uses limit switches as hard limits for movement range control, and when the left and right limit soft limit settings fail for various reasons, it can force the furnace head rotation drive motor to stop, ensuring the safety of personnel operation and equipment operation; convenient system maintenance: since no hydraulic pump station is required, only compressed air pipelines are needed. The system hardware is arranged close together in the surrounding three-dimensional space of the upper and lower furnace legs, resulting in a small footprint. The system has a simple composition, making maintenance and repair easy and convenient. It also has good environmental compatibility: driven by compressed air, there is no risk of hydraulic oil leakage, avoiding contamination of the protective atmosphere of the electroslag furnace and affecting the smelting environment and the purity of the smelted alloy.

[0028] The advantages mentioned above solve the problems of traditional single-head, dual-station rotary electroslag furnaces, where the connection and separation between the upper and lower furnace legs rely on a hydraulic system, requiring a hydraulic station, a complex sealing system, and significant difficulty in repairing leaks. The hydraulic system also requires a hydraulic oil tank and cooling system, resulting in large space requirements and high investment costs. Furthermore, the risk of hydraulic oil leakage can easily contaminate the protective atmosphere of the electroslag furnace and the smelting environment, affecting the purity of the smelted alloy and exhibiting poor environmental compatibility. The upper furnace leg periodically switches between the two stations along with the furnace head, and the vertical positioning between the upper and lower furnace legs relies solely on limit switch signals, leading to large positioning errors, low control precision, the need for manual adjustments on-site, and low production efficiency.

[0029] To achieve the aforementioned technical effects, the pneumatic clamping device for the furnace legs in this example, such as... Figures 1-6 As shown, the cylinder telescopic component 40 also includes: The furnace leg conductive connecting block 108 is located below the upper furnace leg 4 and is fastened to the bottom end of the upper furnace leg 4 by bolts; The insulating sleeve 103 is located below the furnace leg conductive connecting block 108, and the through hole on the insulating sleeve 103 is coaxial with the through hole on the furnace leg conductive connecting block 108; the insulating sleeve 103 is fastened to the furnace leg conductive connecting block 108 by bolts; The cylinder mounting plate 110 is located near the lower end of the upper furnace leg 4 and is fastened to the upper furnace leg 4 by the clamp 109; Clamping cylinder 102 is mounted on cylinder mounting plate 110 and fastened to cylinder mounting plate 110 by bolts; The cylinder insulating pad 101 is located and clamped between the cylinder mounting plate 110 and the clamping cylinder 102; The cylinder body 102-1 and the cylinder piston rod 102-2 are included in the clamping cylinder 102.

[0030] To achieve the aforementioned technical effects, the pneumatic clamping device for the furnace legs in this example, such as... Figures 1-6 As shown, the pneumatic clamping component 50 also includes: The cylinder connecting shaft 104 is located directly below the cylinder piston rod 102-2 of the cylinder telescopic component 40, and passes through the through hole on the furnace leg conductive connecting block 108 and the through hole on the insulating sleeve 103; the upper end of the cylinder connecting shaft 104 is fastened to the lower end of the cylinder piston rod 102-2 by a threaded connection. The conductive connecting block 106 is located below the cylinder connecting shaft 104 and directly above the copper conductive head 501 of the lower furnace leg; The upper end of the conductive connecting block 106 is fastened to the bottom end of the cylinder connecting shaft 104 by bolts. The lower end of the conductive connecting block 106 has a concave spherical surface structure. The conductive insulating plate 105 is located and clamped between the cylinder connecting shaft 104 and the conductive connecting block 106; The copper braided flexible wire 107 is located below the furnace leg conductive connecting block 108 and above the conductive connecting block 106. One end of the copper braided flexible wire 107 is fastened to the lower surface of the furnace leg conductive connecting block 108 by bolts, and the other end of the copper braided flexible wire 107 is fastened to the symmetrically distributed connecting surfaces on both sides of the upper end of the conductive connecting block 106 by bolts.

[0031] To achieve the aforementioned technical effects, the pneumatic clamping device for the furnace legs in this example, such as... Figures 1-6 As shown, when the cylinder piston rod 102-2 extends or retracts, it drives the cylinder connecting shaft 104 and the conductive connecting block 106 to move down or up. When the cylinder piston rod 102-2 extends, it drives the conductive connecting block 106 to descend together. At this time, the concave spherical surface at the lower end of the conductive connecting block 106 comes into contact with and matches the convex spherical surface at the upper end of the copper conductive head 501 of the lower furnace leg, and is firmly clamped under the force of the cylinder. When the cylinder piston rod 102-2 retracts, it drives the conductive connecting block 106 to rise together. At this time, the concave spherical surface at the lower end of the conductive connecting block 106 separates from the convex spherical surface at the upper end of the copper conductive head 501 of the lower furnace leg.

[0032] To achieve the aforementioned technical effects, the pneumatic clamping device for the furnace legs in this example, such as... Figures 1-6As shown, a cylinder extension position switch 111 is fixed at the lower end opposite to the mounting surface of the clamping cylinder 102; when the clamping cylinder 102 extends to the position, the cylinder extension position switch 111 senses the signal and feeds it back to the PLC for logic control.

[0033] The cylinder retraction switch 116 is located at the upper end of the opposite side of the mounting surface of the clamping cylinder 102. When the clamping cylinder 102 retracts into position, the cylinder retraction switch 116 senses the signal and feeds it back to the PLC for logic control.

[0034] To achieve the aforementioned technical effects, the pneumatic clamping device for the furnace legs in this example, such as... Figures 1-6 As shown, a second cooling water inlet 112 is fixed on one side of the lower end of the upper furnace leg 4. The second cooling water inlet 112 is the cooling water inlet of the upper furnace leg 4. A first cooling water inlet 115 is fixed on the other side of the lower end of the upper furnace leg 4. The first cooling water inlet 115 is the cooling water outlet of the upper furnace leg 4. A fourth cooling water interface 113 is provided on one side of the upper end of the conductive connecting block 106 of the pneumatic clamping component. The fourth cooling water interface 113 is the cooling water inlet of the conductive connecting block 106. The third cooling water interface 114 is located on the other side of the upper end of the conductive connecting block 106. The third cooling water interface 114 is the cooling water outlet of the conductive connecting block 106.

[0035] The second embodiment of this utility model also provides a protective atmosphere electroslag furnace, such as Figures 7-9 As shown, the protective atmosphere electroslag furnace in this example also includes: The pneumatic clamping device 1 for furnace legs in the first embodiment; The pneumatic clamping device 1 for the furnace legs is located below the furnace head 2 and above the working platform 6; The upper end of the pneumatic clamping device 1 for the furnace leg is connected and fixed to the upper furnace leg 4; When the furnace head 2 rotates to the corresponding smelting position, the lower end of the furnace leg pneumatic clamping device 1 docks with the upper end of the lower furnace leg 5. The upper furnace leg 4 is fixed below the furnace head 2. The upper end of the upper furnace leg 4 is connected and fixed to the furnace head 2, and the lower end of the upper furnace leg 4 is connected to the furnace leg pneumatic clamping device 1. A lower furnace leg 5 is installed below the upper furnace leg 4, and the bottom end of the lower furnace leg 5 is fastened to the bottom of the smelting station of the protective atmosphere electroslag furnace by bolts. The copper conductive head 501 of the lower furnace leg is located above the lower furnace leg 5 and is fastened to the upper end face of the lower furnace leg 5 by bolts. The upper end of the copper conductive head 501 of the lower furnace leg has a convex spherical structure; The lower furnace leg auxiliary support 10 is located on one side of the lower furnace leg 5 and parallel to the lower furnace leg 5. The bottom end of the lower furnace leg auxiliary support 10 is fastened to the bottom of the smelting station of the protective atmosphere electroslag furnace by bolts. The auxiliary support 10 for the lower furnace leg is fastened to the side of the lower furnace leg 5 by bolts; The burner head 2 is located above the burner head rotary support 3; one end of the burner head 2 is connected and supported by the burner head rotary support 3, and the other end of the burner head 2 is connected and supported by the burner head rotary bracket 9; the burner head 2 can move together with the burner head rotary bracket 9, and drive the upper burner leg 4 to rotate back and forth around the axis of the burner head rotary support 3. The furnace head rotation support 3 is located above the working platform 6, and the base of the furnace head rotation support 3 is fixed to the working platform 6 by welding. The furnace head rotating support 9 is located above the working platform 6. The upper end of the furnace head rotating support 9 is connected and fixed to the other side of the furnace head 2. The lower end of the furnace head rotating support 9 is connected and fixed to the upper end of the active walking wheel group 7 and the upper end of the driven walking wheel group 8, respectively.

[0036] In the protective atmosphere electroslag furnace of this embodiment, such as Figures 7-9 As shown, four sets of pneumatic clamping devices 1 for furnace legs are evenly distributed around the central axis of the smelting station.

[0037] In the protective atmosphere electroslag furnace of this embodiment, such as Figures 7-9 As shown, the protective atmosphere electroslag furnace in this embodiment: The working platform 6 is welded and fixed to several platform support columns below, providing a workspace for the daily production operation of the protective atmosphere electroslag furnace; The rotary track 12 is set on the working platform 6 in the area surrounding the first and second smelting stations.

[0038] The active travel wheel assembly 7 is located on the rotary track 12. The upper end of the active travel wheel assembly 7 is connected and fixed to the lower end of the furnace head rotary support 9. The active travel wheel assembly 7 can move back and forth along the rotary track 12.

[0039] The driven traveling wheel assembly 8 is located on the rotary track 12. The upper end of the driven traveling wheel assembly 8 is connected and fixed to the lower end of the furnace head rotary support 9. The driven traveling wheel assembly 8 can move back and forth along the rotary track 12.

[0040] In the protective atmosphere electroslag furnace of this embodiment, such as Figures 7-9 As shown, the protective atmosphere electroslag furnace in this embodiment further includes: The first limit stop 15 is located near the outer side of the arc of the rotary track 12, and corresponds to the projection position of the first limit switch 14 on the working platform 6 when the furnace head 2 rotates to the left limit position of the first smelting station. The second limit stop 11 is located near the outer side of the arc of the rotary track 12, and corresponds to the projection position of the second limit switch 13 on the working platform 6 when the furnace head 2 rotates to the right limit position of the second smelting station. The slewing limit mounting plate 16 is located on the side of the driven travel wheel set 8; The first limit switch 14 is located on the lower end of the rotary limit mounting plate 16, closer to the drive wheel assembly 7; the first limit switch 14 is fixed to the rotary limit mounting plate 16 by bolts; the first limit switch 14 and the first limit stop 15 form the left limit hard limit of the furnace head 2 rotation control. The second limit switch 13 is located on the lower end of the rotary limit mounting plate 16, on the side farther from the drive wheel assembly 7; The second limit switch 13 is fixed to the rotary limit mounting plate 16 by bolts. The second limit switch 13 and the second limit stop 11 together form the right limit hard limit for the rotation control of the furnace head 2; The encoder mounting plate 18 is positioned in the middle of the rotary limit mounting plate 16; the encoder mounting plate 18 is fixed to the rotary limit mounting plate 16 by bolts. The encoder 19 is mounted on the encoder mounting plate 18. The encoder 19 is fixed to the encoder mounting plate 18 by bolts; the rotating shaft of the encoder 19 is coaxially connected to the rotating shaft of the driven walking wheel group 8; when the furnace head 2 rotates, the encoder 19 feeds back the rotation pulse signal to the PLC in real time, and the PLC calculates and tracks the rotation position of the furnace head 2 in real time. The encoder protection plate 17 is positioned slightly above the center of the rotary limit mounting plate 16. The encoder protection plate 17 is fixed to the rotary limit mounting plate 16 with bolts.

[0041] The pneumatic clamping device 1 for the furnace legs is located below the furnace head 2 and above the working platform 6. The upper end of the pneumatic clamping device 1 is connected and fixed to the upper furnace leg 4. When the furnace head 2 rotates to the center of the corresponding smelting station, the lower end of the pneumatic clamping device 1 engages with the upper end of the lower furnace leg 5. In the protective atmosphere electroslag furnace, the pneumatic clamping device 1 for the furnace legs functions to close or disconnect the high-current channel between the upper furnace leg 4 and the lower furnace leg 5. The protective atmosphere electroslag furnace includes four sets of pneumatic clamping devices 1, evenly distributed circumferentially around the central axis of the smelting station.

[0042] In the protective atmosphere electroslag furnace of this embodiment, such as Figures 7-9 As shown, the upper furnace leg 4 is located below the furnace head 2. The upper end of the upper furnace leg 4 is connected and fixed to the furnace head 2, and the lower end of the upper furnace leg 4 is connected to the furnace leg pneumatic clamping device 1.

[0043] The lower furnace leg 5 is located below the upper furnace leg 4, and the bottom end of the lower furnace leg 5 is fastened to the bottom of the smelting station of the protective atmosphere electroslag furnace by bolts.

[0044] The copper conductive head 501 of the lower furnace leg is located above the lower furnace leg 5 and is fastened to the upper end face of the lower furnace leg 5 by bolts. The upper end of the copper conductive head 501 of the lower furnace leg has a convex spherical structure.

[0045] The lower furnace leg auxiliary support 10 is located on one side of the lower furnace leg 5 and parallel to the lower furnace leg 5. The bottom end of the lower furnace leg auxiliary support 10 is fastened to the bottom of the smelting station of the protective atmosphere electroslag furnace by bolts. The lower furnace leg auxiliary support 10 is fastened to the side of the lower furnace leg 5 by bolts, and provides auxiliary support for the lower furnace leg 5.

[0046] The furnace head 2 is located above the furnace head rotary support 3. One end of the furnace head 2 is connected and supported by the furnace head rotary support 3, and the other end of the furnace head 2 is connected and supported by the furnace head rotary bracket 9. The furnace head 2 can move together with the furnace head rotary bracket 9, and drive the upper furnace leg 4 to rotate back and forth around the rotation axis of the furnace head rotary support 3, realizing the switching between the first smelting station and the second smelting station.

[0047] The furnace head rotary support 3 is located above the working platform 6, and the base of the furnace head rotary support 3 is fixed to the working platform 6 by welding.

[0048] The furnace head rotating support 9 is located above the working platform 6. The upper end of the furnace head rotating support 9 is connected and fixed to the other side of the furnace head 2. The lower end of the furnace head rotating support 9 is connected and fixed to the upper end of the active walking wheel group 7 and the upper end of the driven walking wheel group 8, respectively.

[0049] The working platform 6 is welded and fixed to several platform support columns below, providing a workspace for the daily production operation of the protective atmosphere electroslag furnace.

[0050] The rotary track 12 is set on the working platform 6 in the area surrounding the first and second smelting stations.

[0051] The active travel wheel assembly 7 is located on the rotary track 12. The upper end of the active travel wheel assembly 7 is connected and fixed to the lower end of the furnace head rotary support 9. The active travel wheel assembly 7 can move back and forth along the rotary track 12.

[0052] The driven traveling wheel assembly 8 is located on the rotary track 12. The upper end of the driven traveling wheel assembly 8 is connected and fixed to the lower end of the furnace head rotary support 9. The driven traveling wheel assembly 8 can move back and forth along the rotary track 12.

[0053] In the protective atmosphere electroslag furnace of this embodiment, such as Figures 7-9 As shown, the pneumatic clamping device 1 for the furnace leg is a component of the protective atmosphere electroslag furnace. The conductive connecting block 108 for the furnace leg is located below the upper furnace leg 4 and is fastened to the bottom end of the upper furnace leg 4 by bolts.

[0054] The insulating sleeve 103 is located below the furnace leg conductive connecting block 108, and the through hole on the insulating sleeve 103 is coaxial with the through hole on the furnace leg conductive connecting block 108. The insulating sleeve 103 is fastened to the furnace leg conductive connecting block 108 by bolts.

[0055] The cylinder mounting plate 110 is located near the lower end of the upper furnace leg 4 and is fastened to the upper furnace leg 4 by a clamp 109.

[0056] The clamping cylinder 102 is mounted on the cylinder mounting plate 110 and is fastened to the cylinder mounting plate 110 by bolts.

[0057] The cylinder insulating pad 101 is located and clamped between the cylinder mounting plate 110 and the clamping cylinder 102, and serves as an electrical insulator between the cylinder mounting plate 110 and the clamping cylinder 102.

[0058] The clamping cylinder 102 includes a cylinder body 102-1 and a cylinder piston rod 102-2.

[0059] The cylinder connecting shaft 104 is located directly below the cylinder piston rod 102-2 and passes through the through hole on the furnace leg conductive connecting block 108 and the through hole on the insulating sleeve 103. The upper end of the cylinder connecting shaft 104 is fastened to the lower end of the cylinder piston rod 102-2 by a threaded connection. The insulating sleeve 103 serves to electrically insulate the cylinder connecting shaft 104 from the furnace leg conductive connecting block 108.

[0060] The conductive connecting block 106 is located below the cylinder connecting shaft 104 and directly above the copper conductive head 501 of the lower furnace leg.

[0061] The upper end of the conductive connecting block 106 is fastened to the bottom end of the cylinder connecting shaft 104 by bolts. The lower end of the conductive connecting block 106 has a concave spherical structure.

[0062] The conductive insulating plate 105 is located and clamped between the cylinder connecting shaft 104 and the conductive connecting block 106, and serves as an electrical insulator between the cylinder connecting shaft 104 and the conductive connecting block 106.

[0063] The copper braided flexible wire 107 is located below the furnace leg conductive connecting block 108 and above the conductive connecting block 106. One end of the copper braided flexible wire 107 is bolted to the lower surface of the furnace leg conductive connecting block 108, and the other end is bolted to the symmetrically distributed connecting surfaces on both sides of the upper end of the conductive connecting block 106. The function of the copper braided flexible wire 107 is to provide a current path between the furnace leg conductive connecting block 108 and the conductive connecting block 106.

[0064] When the cylinder piston rod 102-2 extends or retracts, it can drive the cylinder connecting shaft 104 and the conductive connecting block 106 to move down or up together.

[0065] When the piston rod 102-2 of the cylinder extends, it drives the conductive connecting block 106 to descend together. At this time, the concave spherical surface at the lower end of the conductive connecting block 106 comes into contact with and matches the convex spherical surface at the upper end of the copper conductive head 501 of the lower furnace leg, and is firmly clamped together under the force of the cylinder, providing a large current channel between the upper furnace leg 4 and the lower furnace leg 5.

[0066] When the cylinder piston rod 102-2 retracts, it drives the conductive connecting block 106 to rise together. At this time, the concave spherical surface at the lower end of the conductive connecting block 106 separates from the convex spherical surface at the upper end of the copper conductive head 501 of the lower furnace leg, cutting off the large current channel between the upper furnace leg 4 and the lower furnace leg 5.

[0067] The cylinder extension position switch 111 is located at the lower end opposite to the mounting surface of the clamping cylinder 102. When the clamping cylinder 102 extends to the position, the cylinder extension position switch 111 senses the signal and feeds it back to the PLC for logic control.

[0068] The cylinder retraction switch 116 is located at the upper end of the opposite side of the mounting surface of the clamping cylinder 102. When the clamping cylinder 102 retracts to its original position, the cylinder retraction switch 116 senses the signal and feeds it back to the PLC for logic control.

[0069] The second cooling water interface 112 is located on one side of the lower end of the upper furnace leg 4 and is the cooling water inlet of the upper furnace leg 4.

[0070] The first cooling water inlet 115 is located on the other side of the lower end of the upper furnace leg 4 and is the cooling water outlet of the upper furnace leg 4.

[0071] The fourth cooling water interface 113 is located on one side of the upper end of the conductive connecting block 106 and is the cooling water inlet of the conductive connecting block 106.

[0072] The third cooling water interface 114 is located on the other side of the upper end of the conductive connecting block 106 and is the cooling water outlet of the conductive connecting block 106.

[0073] The first limit stop 15 is located near the outer side of the arc of the rotary track 12, and corresponds to the projection position of the first limit switch 14 on the working platform 6 when the furnace head 2 rotates to the left limit position of the first smelting station.

[0074] The second limit stop 11 is located near the outer side of the arc of the rotary track 12, and corresponds to the projection position of the second limit switch 13 on the working platform 6 when the furnace head 2 rotates to the right limit position of the second smelting station.

[0075] The slewing limit mounting plate 16 is located on the side of the driven travel wheel set 8.

[0076] The first limit switch 14 is located on the lower end of the rotary limit mounting plate 16, closer to the drive wheel assembly 7. The first limit switch 14 is fixed to the rotary limit mounting plate 16 by bolts. The first limit switch 14 and the first limit stop 15 constitute the left limit hard limit for the rotation control of the furnace head 2.

[0077] The second limit switch 13 is located on the lower end of the rotary limit mounting plate 16, on the side farther from the drive wheel assembly 7. The second limit switch 13 is fixed to the rotary limit mounting plate 16 by bolts. The second limit switch 13 and the second limit stop 11 together form the right limit hard limit for the rotation control of the furnace head 2.

[0078] The encoder mounting plate 18 is positioned in the middle of the rotary limit mounting plate 16. The encoder mounting plate 18 is fixed to the rotary limit mounting plate 16 by bolts.

[0079] Encoder 19 is mounted on encoder mounting plate 18. Encoder 19 is fixed to encoder mounting plate 18 by bolts. The rotating shaft of encoder 19 is coaxially connected to the rotating shaft of driven walking wheel assembly 8. When the furnace head 2 rotates, encoder 19 feeds back the rotation pulse signal to PLC in real time, so that PLC can accurately calculate and track the rotation position of furnace head 2 in real time.

[0080] The encoder protective plate 17 is positioned slightly above the center of the rotary limit mounting plate 16. The encoder protective plate 17 is fixed to the rotary limit mounting plate 16 with bolts. The encoder protective plate 17 serves to provide a protective barrier for the encoder 19.

[0081] The PLC program for the protective atmosphere electroslag furnace sets left and right soft limits for the rotation of the furnace head 2. The control angle between the two soft limits is smaller than the control angle between the two hard limits and falls within the control angle range between the two hard limits. During the back-and-forth movement of the furnace head 2 between the first and second smelting stations driven by the active travel wheel set 7, the encoder 19 on the driven travel wheel set 8 feeds back rotational pulse signals to the PLC in real time. The PLC accurately calculates and tracks the rotational position of the furnace head 2 in real time. When the PLC detects that the furnace head 2 has rotated to the left soft limit of the first smelting station or the right soft limit of the second smelting station, the PLC issues a command to stop the drive motor of the active travel wheel set 7. Because the rotational pulse signals from the encoder 19 are fed back to the PLC in real time for accurate calculation and tracking of the furnace head 2's rotational position, the position control of the furnace head 2 is more precise. This invention solves the problems of traditional single-head dual-station rotary electroslag furnaces, where the vertical positioning between the upper and lower furnace legs relies solely on limit switch signals when the furnace head switches back and forth between the two stations. This results in large positioning errors, low control precision, the need for manual adjustments on-site, and low production efficiency.

[0082] Since the left and right soft limits of the furnace head 2 rotation are set in the PLC program, the left and right soft limits can be set and adjusted with only slight modifications to the relevant program. Therefore, it is very convenient to set, debug and adjust the left and right limit positions of the furnace head 2 rotation on site.

[0083] Meanwhile, in order to ensure the safety of personnel operation and equipment operation, the protective atmosphere electroslag furnace is equipped with a left limit hard limit controlled by the rotation of the furnace head 2, which consists of a first limit switch 14 and a first limit block 15, and a right limit hard limit controlled by the rotation of the furnace head 2, which consists of a second limit switch 13 and a second limit block 11.

[0084] When the left soft limit set by the PLC program fails due to various reasons, the furnace head 2 will continue to rotate beyond the left limit hard limit of the first smelting station. The first limit switch 14 will touch the first limit block 15. The first limit switch 14 will sense the signal that the furnace head has reached the left limit hard limit and feed it back to the PLC. The PLC will issue a command to force the drive motor of the active walking wheel group 7 to stop moving, so as to ensure the safety of personnel and equipment.

[0085] When the right soft limit set by the PLC program fails due to various reasons, the furnace head 2 will continue to rotate beyond the right limit of the second smelting station. The second limit switch 13 will touch the second limit block 11. The second limit switch 13 will sense the signal that the furnace head has reached the right limit and feed it back to the PLC. The PLC will issue a command to force the drive motor of the active walking wheel group 7 to stop moving, so as to ensure the safety of personnel and equipment.

[0086] Those skilled in the art will understand that the above embodiments are specific examples of implementing the present invention, and in practical applications, various changes can be made to them in form and detail without departing from the spirit and scope of the present invention.

Claims

1. A protective atmosphere electroslag furnace with a pneumatic clamping device for furnace legs, characterized in that, Also includes: Pneumatic clamping device for furnace legs (1); The pneumatic clamping device (1) for the furnace legs also includes:

4. Add the ham to the oven. A cylinder telescopic component (40) is provided below the upper furnace leg (4). Lower furnace leg (5); The lower furnace leg (5) is provided below the upper furnace leg (4); A pneumatic clamping component (50) is provided above the lower furnace leg (5); the cylinder telescopic component (40) extends and retracts to the pneumatic clamping component (50); the pneumatic clamping component (50) clamps the cylinder telescopic component (40) and connects or disconnects the high current channel between the upper furnace leg (4) and the lower furnace leg (5).

2. The protective atmosphere electroslag furnace with pneumatic clamping device for furnace legs according to claim 1, characterized in that, The cylinder telescopic component (40) further includes: A furnace leg conductive connecting block (108) is located below the upper furnace leg (4) and is fastened to the bottom end of the upper furnace leg (4) by bolts. An insulating sleeve (103) is located below the furnace leg conductive connecting block (108), and the through hole on the insulating sleeve (103) is coaxial with the through hole on the furnace leg conductive connecting block (108); the insulating sleeve (103) is fastened to the furnace leg conductive connecting block (108) by bolts; Cylinder mounting plate (110), the cylinder mounting plate (110) is located near the lower end of the upper furnace leg (4), and is fastened to the upper furnace leg (4) by clamp (109); A clamping cylinder (102) is mounted on the cylinder mounting plate (110) and fastened to the cylinder mounting plate (110) by bolts; A cylinder insulating pad (101) is located and clamped between the cylinder mounting plate (110) and the clamping cylinder (102); The cylinder body (102-1) and the cylinder piston rod (102-2) are included in the clamping cylinder (102).

3. The protective atmosphere electroslag furnace with pneumatic clamping device for furnace legs according to claim 1, characterized in that, The pneumatic clamping component (50) further includes: The cylinder connecting shaft (104) is located directly below the cylinder piston rod (102-2) of the cylinder telescopic component (40) and passes through the through hole on the furnace leg conductive connecting block (108) and the through hole on the insulating sleeve (103); the upper end of the cylinder connecting shaft (104) is fastened to the lower end of the cylinder piston rod (102-2) by a threaded connection. A conductive connecting block (106) is located below the cylinder connecting shaft (104) and directly above the lower furnace leg copper conductive head (501). The upper end of the conductive connecting block (106) is fastened to the bottom end of the cylinder connecting shaft (104) by bolts; the lower end of the conductive connecting block (106) has a concave spherical structure. A conductive insulating plate (105) is located and clamped between the cylinder connecting shaft (104) and the conductive connecting block (106); A copper braided flexible wire (107) is located below the furnace leg conductive connecting block (108) and above the conductive connecting block (106). One end of the copper braided flexible wire (107) is fastened to the lower surface of the furnace leg conductive connecting block (108) by bolts, and the other end of the copper braided flexible wire (107) is fastened to the symmetrically distributed connecting surfaces on both sides of the upper end of the conductive connecting block (106) by bolts.

4. The protective atmosphere electroslag furnace with pneumatic clamping device for furnace legs according to claim 3, characterized in that, When the cylinder piston rod (102-2) extends or retracts, it drives the cylinder connecting shaft (104) and the conductive connecting block (106) to move down or up. When the cylinder piston rod (102-2) extends, it drives the conductive connecting block (106) to descend together; at this time, the concave spherical surface at the lower end of the conductive connecting block (106) and the convex spherical surface at the upper end of the copper conductive head (501) of the lower furnace leg come into contact and match each other, and are firmly clamped under the action of the cylinder. When the cylinder piston rod (102-2) retracts, it drives the conductive connecting block (106) to rise together; at this time, the lower concave spherical surface of the conductive connecting block (106) separates from the upper convex spherical surface of the lower furnace leg copper conductive head (501).

5. The protective atmosphere electroslag furnace with pneumatic clamping device for furnace legs according to claim 2, characterized in that, A cylinder extension position switch (111) is fixed at the lower end opposite to the mounting surface of the clamping cylinder (102); when the clamping cylinder (102) extends to the position, the cylinder extension position switch (111) senses the signal and feeds it back to the PLC for logic control. The cylinder retraction switch (116) is located at the upper end of the opposite side of the mounting surface of the clamping cylinder (102). When the clamping cylinder (102) retracts into position, the cylinder retraction switch (116) senses the signal and feeds it back to the PLC for logic control.

6. The protective atmosphere electroslag furnace with pneumatic clamping device for furnace legs according to claim 1, characterized in that, A second cooling water inlet (112) is fixed on one side of the lower end of the upper furnace leg (4). The second cooling water inlet (112) is the cooling water inlet of the upper furnace leg (4). A first cooling water inlet (115) is fixed on the other side of the lower end of the upper furnace leg (4). The first cooling water inlet (115) is the cooling water outlet of the upper furnace leg (4). A fourth cooling water interface (113) is provided on one side of the upper end of the conductive connecting block (106) of the pneumatic clamping component. The fourth cooling water interface (113) is the cooling water inlet of the conductive connecting block (106). The third cooling water interface (114) is located on the other side of the upper end of the conductive connecting block (106), and the third cooling water interface (114) is the cooling water outlet of the conductive connecting block (106).

7. The protective atmosphere electroslag furnace with pneumatic clamping device for furnace legs according to claim 1, characterized in that, The protective atmosphere electroslag furnace also includes: The furnace head (2) and the pneumatic clamping device (1) for the furnace legs are located below the furnace head (2) and above the working platform (6); The upper end of the pneumatic clamping device (1) for the furnace leg is connected and fixed to the upper furnace leg (4); When the furnace head (2) rotates to the corresponding smelting position, the lower end of the furnace leg pneumatic clamping device (1) docks with the upper end of the lower furnace leg (5); The upper furnace leg (4) is fixed below the furnace head (2), the upper end of the upper furnace leg (4) is connected and fixed to the furnace head (2), and the lower end of the upper furnace leg (4) is connected to the furnace leg pneumatic clamping device (1). The lower furnace leg (5) is provided below the upper furnace leg (4), and the bottom end of the lower furnace leg (5) is fastened to the bottom of the smelting station of the protective atmosphere electroslag furnace by bolts; The lower furnace leg copper conductive head (501) is located above the lower furnace leg (5) and is fastened to the upper end face of the lower furnace leg (5) by bolts; the upper end of the lower furnace leg copper conductive head (501) has a convex spherical structure. The lower furnace leg auxiliary support (10) is located on one side of the lower furnace leg (5) and parallel to the lower furnace leg (5). The bottom end of the lower furnace leg auxiliary support (10) is fastened to the bottom of the smelting station of the protective atmosphere electroslag furnace by bolts. The auxiliary support (10) for the lower furnace leg is fastened to the side of the lower furnace leg (5) by bolts; The burner head (2) is located above the burner head rotating support base (3); one end of the burner head (2) is connected and supported by the burner head rotating support base (3), and the other end of the burner head (2) is connected and supported by the burner head rotating bracket (9); the burner head (2) can move together with the burner head rotating bracket (9) and drive the upper furnace leg (4) to rotate back and forth around the rotating axis of the burner head rotating support base (3); A furnace head rotation support (3) is located above the working platform (6). The base of the furnace head rotation support (3) is fixed to the working platform (6) by welding. The furnace head rotating bracket (9) is located above the working platform (6). The upper end of the furnace head rotating bracket (9) is connected and fixed to the other side of the furnace head (2). The lower end of the furnace head rotating bracket (9) is connected and fixed to the upper end of the active walking wheel group (7) and the upper end of the driven walking wheel group (8).

8. The protective atmosphere electroslag furnace with pneumatic clamping device for furnace legs according to claim 7, characterized in that, The protective atmosphere electroslag furnace includes four sets of pneumatic clamping devices (1) for the furnace legs, which are evenly distributed around the central axis of the smelting station.

9. The protective atmosphere electroslag furnace with pneumatic clamping device for furnace legs according to claim 7, characterized in that, The working platform (6) is welded and fixed to several platform support columns below, providing a workplace for the daily production operation of the protective atmosphere electroslag furnace; A rotary track (12) is provided on the working platform (6) in the area surrounding the first smelting station and the second smelting station; Active walking wheel assembly (7) is located on the rotary track (12); the upper end of the active walking wheel assembly (7) is connected and fixed to the lower end of the furnace head rotary support (9); the active walking wheel assembly (7) can move back and forth along the rotary track (12); The driven walking wheel assembly (8) is located on the rotary track (12); the upper end of the driven walking wheel assembly (8) is connected and fixed to the lower end of the furnace head rotary support (9); the driven walking wheel assembly (8) can move back and forth along the rotary track (12).

10. The protective atmosphere electroslag furnace with pneumatic clamping device for furnace legs according to claim 9, characterized in that, The first limit block (15) is located near the outer side of the arc of the rotary track (12) and corresponds to the projection position of the first limit switch (14) on the working platform (6) when the furnace head (2) rotates to the left limit position of the first smelting station. The second limit block (11) is located near the outer side of the arc of the rotary track (12) and corresponds to the projection position of the second limit switch (13) on the working platform (6) when the furnace head (2) rotates to the right limit position of the second smelting station; A slewing limit mounting plate (16) is located on the side of the driven walking wheel assembly (8); The first limit switch (14) is located on the side of the lower end of the rotary limit mounting plate (16) that is closer to the active walking wheel assembly (7); the first limit switch (14) is fixed on the rotary limit mounting plate (16) by bolts; the first limit switch (14) and the first limit stop (15) constitute the left limit hard limit of the furnace head (2) rotation control; The second limit switch (13) is located on the side of the lower end of the rotary limit mounting plate (16) that is farther away from the active walking wheel assembly (7); The second limit switch (13) is fixed to the rotary limit mounting plate (16) by bolts; the second limit switch (13) and the second limit stop (11) constitute the right limit hard limit of the furnace head (2) rotation control; An encoder mounting plate (18) is disposed at the middle position of the rotary limiting mounting plate (16); the encoder mounting plate (18) is fixed to the rotary limiting mounting plate (16) by bolts. An encoder (19) is mounted on an encoder mounting plate (18). The encoder (19) is fixed to the encoder mounting plate (18) by bolts. The shaft of the encoder (19) is coaxially connected to the shaft of the driven walking wheel assembly (8). When the furnace head (2) rotates, the encoder (19) feeds back the rotation pulse signal to the PLC in real time. The PLC calculates and tracks the rotation position of the furnace head (2) in real time. The encoder protection plate (17) is located at the upper middle position of the rotary limit mounting plate (16); the encoder protection plate (17) is fixed to the rotary limit mounting plate (16) by bolts.

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