JPH0654713B2 - Electrode furnace electrode connection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrode connecting device for an electric furnace.

[0002]

2. Description of the Related Art In an electric furnace such as an arc furnace, when an electrode inserted at the top of the furnace is worn out and cannot be used, a new electrode is added to the electrode. Various types of electrode connection devices have been proposed as an electrode connection device in which a new electrode is added to an old electrode. This conventional electrode connecting device is shown in FIGS.
It was as shown in 2.

That is, in FIG. 11 and FIG. 12, a conventional electrode connecting device is a suspension frame device suspended from a crane.
80, and a new electrode that is vertically movable and rotatable with respect to the suspension frame device 80 and has a connection screw at the lower end.
A new electrode holding device 82 for holding 81 in a vertical axis posture, a rotating device 83 for rotating the holding device 82 about its axis, and a holding device 82 for rotating by the rotating device 83, connecting screw lead of the new electrode 81. Lifting device 84 for raising and lowering with respect to the suspension frame device 80 with the same lead as above, reaction force absorbing bar 85 fixed to the suspension frame device 80 and extending downward, and fixed to the reaction force absorbing bar 85 And a guide plate 86 that has been formed.

In the conventional electrode connecting device described above, FIG.
As shown in, the electrode connecting device is mounted on the mounting table 87 so as not to tip over. Then, suspend the new electrode 81 with a crane,
The new electrode 81 is held by inserting it into the new electrode holding device. next,
As shown in FIG. 12, the hanging frame device 80 is hung by a crane, the electrode connecting device holding the new electrode 81 is moved onto the electric furnace, and the old electrode 89 is held above the electric electrode holder 88 of the electric furnace. Then, the electrode connecting device is lowered. At this time, the guide plate 86 is brought into contact with the side surface of the old electrode 89 to perform centering, the connection screw at the lower end of the new electrode 81 and the connected screw at the upper end of the old electrode 89 are brought into contact, and the reaction force is absorbed. The bar 85 is fitted to the electrode holder 88. Next, the rotating device 83 is activated and the new electrode holding device 82 is rotated to rotate the new electrode 81.
To rotate. By this rotation, the screw of the lifting device 84 rotates, the new electrode 81 descends with the same lead as the connection screw, the connection screw and the connected screw are screwed together, and the new electrode 81 and the old electrode 89 are connected. .

[0005]

In the above-mentioned conventional electrode connecting device, the new electrode 81 must be inserted toward the new electrode holding device from above the electrode connecting device placed on the stand 87 on the ground. Therefore, it is necessary to have a ground worker in addition to the crane operator who is in the driver's seat of the overhead traveling crane to help insert and hold the new electrode 81.

Further, in the connection work of the new electrode 81 and the old electrode 89 on the furnace of the electric furnace, the electrode connecting device is hung by a crane, the guide plate 86 is brought into contact with the old electrode 89, and the reverse electrode The force-absorbing bar 85 had to fit into the electrode holder 88 and the device had to be lowered so that the lower end of the new electrode 81 was in close contact with the upper end of the old electrode 89. Therefore, a connection worker on the furnace was required separately from the crane operator.

Therefore, it is an object of the present invention to provide an electrode connecting device for an electric furnace in which the electrode connecting work on the furnace can be performed only by a crane operator.

[0008]

In order to achieve the above object, the present invention has taken the following means. That is, a feature of the present invention is that a suspension frame device that is suspended by a suspension device that is movable in the horizontal and vertical directions, and a rotation frame that is rotatably supported by the suspension frame device in a vertical axis posture. A cylinder and a new electrode clamp device for clamping a new electrode having a connecting screw at the lower end portion housed in the rotary inner cylinder so that the new electrode can be detachably attached to the rotary inner cylinder, and the rotary inner cylinder around its axis. A rotating device for rotating the rotating inner cylinder and a rotating device for moving the rotating inner cylinder up and down with respect to the suspension frame device by the same lead as the connection screw of the new electrode, and below the rotating inner cylinder. Further, it is provided in the lower portion of the suspension frame device and has a side opening through which the new electrode can pass, and when it comes into contact with the outer peripheral surface of the new electrode, the shaft center of the new electrode is the rotating inner cylinder New electrode guide device with a contact surface that matches the axis of the
A new electrode stopper device that is provided below the new electrode guide device, supports the lower end surface of the new electrode, and holds the new electrode with respect to the suspension frame device, and a retractable new electrode stopper device, and the suspension frame device. A side opening is provided at the lower end that can move up and down, and has a connected screw that is screwed into the connecting screw of the new electrode at the upper end to allow passage of the old electrode held in the electrode holder of the electric furnace. And an old electrode guide device having an abutting surface for aligning the axis of the old electrode with the axis of the new electrode when abutting on the outer peripheral surface of the old electrode. The present invention is provided with an old electrode clamp device that clamps the old electrode detachably and an old electrode stopper device that is provided in the old electrode guide device and that is movable back and forth to abut the upper end surface of the old electrode.

[0009]

According to the present invention, the new electrode is held so that the lower end surface thereof is lifted up from the floor surface and the axial center thereof is the vertical axis center. Then, the suspension frame device is suspended by a suspension device such as a crane, and the entire electrode connecting device of the present invention is suspended. Then, the device is brought close to the electrode connecting device from the side of the new electrode placed in the vertical posture, and the new electrode is received from the side openings of the new electrode guide device and the old electrode guide device. The side surface of the new electrode is brought into contact with the contact surface of. Next, the suspension frame device is lowered by the suspension device until the lower end surface of the new electrode passes through the new electrode stopper device, and the stopper device is projected inwardly of the contact surface. At this time, the upper part of the new electrode is housed in the rotating inner cylinder.

Next, when the suspension frame device is lifted by the suspension device, the new electrode stopper device supports the lower end surface of the new electrode, and the new electrode is held by the suspension frame device. Then, the entire electrode connecting device holding the new electrode is moved to the furnace top of the electric furnace by the suspending device. Then, while lowering the device, the old electrode held by the electrode holder of the electric furnace is approached from the side. Then, the side surface of the old electrode is brought into contact with the old electrode guide device which is opened laterally. By this contact, the cores of the old and new electrodes are positioned on the coaxial core.

Next, when the electrode connecting device is lowered by the suspending device, the protruding old electrode stopper device comes into contact with the top surface of the old electrode, and the descending of the old electrode guide device is prevented, so that the suspending frame device. Only descends. By further lowering the suspension frame device, the lower end of the new electrode and the upper end of the old electrode come into contact with each other. This contact stops the descent of the device.

Then, the new electrode is clamped by the new electrode clamp device, the old electrode is clamped by the old electrode clamp device, and the new electrode stopper device and the old electrode stopper device are retracted to release the contact of each end face. To do. Next, the rotating inner cylinder is rotated around the vertical axis by the rotating device. By this rotation, the rotating inner cylinder descends with the same lead as the electrode connecting screw by the elevating device, so that the connecting screw at the lower end of the new electrode and the connected screw at the upper end of the old electrode are screwed together.

When the connection of the old and new electrodes is completed, the clamp of the old and new electrode clamp device is released and the electrode connection device is raised. Then, the rising of the new electrode is stopped within a range where the new electrode does not completely pass through the old electrode guide device, and the connection electrode is re-clamped by the old electrode clamp device. Then, the holding of the electrode holder of the electric furnace is released, and the electrode connecting device is lowered to lower the connecting electrode and adjust the amount of protrusion in the furnace. afterwards,
The electrode is held by the electrode holder, the old electrode clamp device is unclamped, and the electrode connecting device is raised and returned to the initial position.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2, the electrode connecting device 1 of the present invention
Has a suspension frame device 3 suspended from a suspension device 2 such as a horizontally movable and vertically movable crane. The hanging frame device 3 is a gate-type hanging frame 5 that is movably hung on the hook 4 of the hanging device 1 and is rotatable on the lower end of the hanging frame 5 via a horizontal support shaft 6. The upper frame 7 is connected to the upper frame 7 and the lower frame 8 made of three pipes is provided at the lower end of the upper frame 7.

In the inner space of the upper frame 7, a rotating inner cylinder 9 having a vertical axis posture is housed. This rotating inner cylinder 9
It is suspended by an elevating device 10 provided across the center of the upper end surface thereof and the lateral center of the upper end of the upper frame 7. The rotating inner cylinder 9 is rotatable about the vertical axis by a rotating device 11 provided between the rotating inner cylinder 9 and the upper frame 7.

At the lower end of the rotating inner cylinder 9 is formed a trumpet-shaped opening into which the new electrode 12 can be inserted. A pair of opening windows 13 located on the diameter line of the rotary inner cylinder 9 and facing each other are opened on the side surface of the lower part of the rotary inner cylinder 9, and project from the windows 13 so as to be able to retract into and out of the rotary inner cylinder 9. Thus, a new electrode clamp device 14 that holds the outer peripheral surface of the new electrode 12 is provided.

At the lower part of the lower frame 8, there is provided a new electrode guide device 15 which is opened to the side and receives the new electrode 12 from the side opening. On the lower surface side of the new electrode guide device 15, the new electrode is projected so as to be retractable into the inner space surrounded by the three pipe members of the lower frame 8.
A new electrode stopper device 16 supporting the lower end face of 12 is provided. A connection screw 17 protruding downward is provided at the center of the lower end surface of the new electrode 12.

Below the lower frame 8, an old electrode guide device 19 suspended from the lower frame 8 via a rope 18 is provided. The old electrode guide device 19,
The new electrode guide device 15 has a side opening in the same direction as the side opening, and the old electrode 20 can be received through the side opening. A connection screw 21 that is screwed into the connection screw 17 of the new electrode 12 is formed at the center of the upper end surface of the old electrode 20.

The old electrode guide device 19 is provided with an old electrode clamp device 22 for holding the outer peripheral surface of the old electrode 20. In addition, the old electrode guide device 19 has an old electrode
An old electrode stopper device 23 that contacts the upper end surface of 20 is provided. On the upper end surface of the old electrode guide device 19, and
A guide post 24 protruding upward is provided at a position corresponding to the three pipe members, and the guide post 24 is slidably fitted in the inner hole of the pipe member. Thus, the lower end portion of the pipe material that constitutes the lower frame 8 forms a vertical guide portion 25 that guides the old electrode guide device 19 in the vertical direction.

The hanging frame device 3 is provided with an air blow nozzle 26 for ejecting air toward the upper end surface of the old electrode 20. Based on FIGS. 3 and 4, the elevating device 10, the rotating device 11, and the new electrode clamping device 14
Etc. will be described in more detail. The elevating device 10 is screwed into a female screw cylinder 27 provided at a lateral center of the upper end of the upper frame 7 and a threaded portion on the inner surface of the female screw cylinder 27, so that the rotating inner cylinder 9 The screw 28 is provided at the center of the upper end surface so as to project upward. The screw leads of the female screw cylinder 27 and the screw 28 are the same as the screw leads of the connection screw 17 of the new electrode 12.

Therefore, when the rotating inner cylinder 9 rotates, the rotating inner cylinder 9 moves up and down with respect to the suspension frame device 3 with the same lead as the screw lead. The rotating device 11
Has a hydraulic motor 29 provided on the upper frame 7. The output shaft of this hydraulic motor 29 has a vertical pinion
30 are combined. On the other hand, a ring gear 31 is attached to the outer peripheral surface of the rotating inner cylinder 9, and the ring gear 31
31 and the pinion 30 mesh with each other. The pinion
Even if the rotating inner cylinder 9 moves up and down, the ring gear 31
It has such a length that it does not come out of mesh with.

Limit switches 32 and 33 for detecting the upper and lower limits of the moving range of the rotating inner cylinder 9 are provided in the upper frame 7. A hydraulic pump 34 that supplies hydraulic oil to the hydraulic motor 29 is provided in an oil tank 35 attached to the upper frame 7. An electric motor 36 that drives the hydraulic pump 34 is provided on the upper surface of the hydraulic tank 35.

The outer peripheral surface of the rotating inner cylinder 9 is an upper frame.
It is rotatably supported by a bearing 37 provided on the shaft 7 to prevent rotation runout. The hydraulic motor
29 reverse rotation limit switches 38
(See FIGS. 2 and 5). The new electrode clamp device 14 has a hydraulic cylinder 39 provided on the outer peripheral portion of the lower portion of the rotating inner cylinder 9 with a lateral axis. The hydraulic cylinder 39 has cylinder rods protruding at both ends so that the cylinder rods can freely move back and forth, and each of the rods has a swing arm.
40 are combined. The middle part of the pair of left and right swing arms 40 is rotatably supported by a support shaft 41 which is attached to the outer circumference of the rotating inner cylinder 9 and has a vertical axis. And each swing arm
An arcuate vise 42 is pivotally supported at the tip of 40. The vise 42 faces the opening window 13 formed on the side surface of the rotating inner cylinder 9 and can freely move in and out of the rotating inner cylinder 9 through the window 13, and a new electrode housed in the rotating inner cylinder 9 is provided. Hold 12 outer peripheral surfaces.

In the hydraulic cylinder 39, the hydraulic pump
Hydraulic fluid is supplied from 34. In this case, the hydraulic cylinder 39
Is provided on the rotating inner cylinder 9 and the hydraulic pump 34 is provided on the upper frame 7 which does not rotate.Therefore, the hydraulic oil is supplied via the universal swivel elbow 43 provided on the screw 28 on the upper part of the rotating inner cylinder 9. Is configured to be supplied (see FIG. 3).

5 to 7 show the details of the new electrode guide device 15, the new electrode stopper device 16, the old electrode guide device 19, the old electrode clamp device 22, the old electrode stopper device 23 and the like. The new electrode guide device 15 has an upper horseshoe-shaped guide frame 44 fixed to the lower part of the three pipe members of the lower frame 8. The upper horseshoe-shaped guide frame 44 has a lateral opening 45 that receives the new electrode 12 in a vertical posture from the lateral direction. The three pipe members are fixed to the left and right ends and the center of the upper horseshoe-shaped guide frame 44. The inner peripheral surface of the upper horseshoe-shaped guide frame 44 is an arcuate contact surface that contacts the outer peripheral surface of the new electrode.
Is formed into 46. When the new electrode 12 contacts the contact surface 46, the axis of the new electrode 12 and the axis of the rotating inner cylinder 9 are aligned with each other.

The new electrode stopper device 16 includes a support shaft 47 having a vertical posture on the lower surface side of the upper horseshoe-shaped guide frame 44.
One upper stopper 48 pivotally supported via
Have. The upper stopper 48 is biased by a spring 49 so as to project inward of the arcuate contact surface 46 of the upper horseshoe-shaped guide frame 44. The upper stopper 48
A hydraulic cylinder 50 is provided on the lower surface side of the upper horseshoe-shaped guide frame 44 for rotating around the support shaft 47 and retracting it to the outside of the arcuate contact surface 46. Hydraulic oil is supplied to the hydraulic cylinder 50 from the hydraulic pump 34. The piston rod of the hydraulic cylinder 50 and the upper stop 48 are not joined, but are in contact with each other in a freely contactable and separable manner. Therefore, when the new electrode 12 enters the upper horseshoe-shaped guide frame 44, the upper stopper 48 is pushed by the outer peripheral surface of the new electrode 12 and retracts to the outside of the arcuate contact surface 46. Further, when the pushing of the outer peripheral surface of the new electrode 12 is released, the upper stopper 48 projects inward of the arcuate contact surface 46 by the spring 49.

On the lower surface side of the upper horseshoe-shaped guide frame 44, there is provided a detection switch 51 which is pushed when the old electrode guide device 19 approaches a predetermined distance. The old electrode guide device 19 has a lower horseshoe-shaped guide frame 52 having substantially the same shape as the upper horseshoe-shaped guide frame 44 of the new electrode guide device 15. This lower horseshoe guide frame
52 also has a side opening 53 that opens in the same direction as the upper horseshoe-shaped guide frame 44, and from this side opening 53 the old electrode
It accepts 20 freely. Further, the inner peripheral surface of the lower horseshoe-shaped guide frame 52 is formed into an arcuate contact surface 54 that contacts the outer peripheral surface of the old electrode 20, and when the old electrode 20 contacts the contact surface 54, The axis of the new electrode 12 is configured to match.

The lower horseshoe-shaped guide frame 52 is suspended from the lower portions of the three pipe members by the three ropes 18. The guide posts 24 are erected on the upper surface of the lower horseshoe-shaped guide frame 52. The upper portion of the guide post 24 is formed in a conical shape, and is vertically slidably inserted into the vertical guide portion 25 at the lower end of the pipe material.

Further, the lower horseshoe-shaped guide frame 52 is urged upward by a spring 55 so as to project upward, and comes into contact with and separates from the detection switch 51 provided on the upper horseshoe-shaped guide frame 44 so as to be detachable. A moving pin 56 is provided. The old electrode clamp device 22 is provided on the lower surface side of the lower horseshoe-shaped guide frame 52.
The old electrode clamp device 22 has a hydraulic cylinder 57 provided on the lower surface side of the lower horseshoe-shaped guide frame 52 with a lateral axis. This hydraulic cylinder 57 has
It has cylinder rods that project freely at both ends,
A swing arm 58 is coupled to each of the rods. The middle part of the pair of left and right swing arms 58 is rotatably supported by a support shaft 59, which is attached to the lower horseshoe-shaped guide frame 52 and has a vertical axis. An arcuate vise 60 is pivotally supported at the tip of each swing arm 58. The vise 60 is capable of retracting inside the arcuate contact surface 54 of the lower horseshoe-shaped guide frame 52, and holds the outer peripheral surface of the old electrode 20. Hydraulic oil is supplied to the hydraulic cylinder 57 from the hydraulic pump 34.

The old electrode stopper device 23 includes a support shaft 61 in a vertical posture on the upper surface side of the lower horseshoe-shaped guide frame 52.
3 lower stoppers 62 pivotally supported via
Have. The lower stopper 62 is urged by a torsion spring 63 wound around the support shaft 61 so as to project inward of the arcuate contact surface 54 of the lower horseshoe-shaped guide frame 52.

The lower stopper 62 is constructed so as to be retracted by a hydraulic cylinder 50 which operates the upper stopper 48. That is, the pair of left and right hydraulic cylinders 50 provided on the lower surface side of the upper horseshoe-shaped guide frame 44 shown in FIG. 6, the rods 50a of the pair of left and right hydraulic cylinders 50, and the tips of the arms 50b provided on the rods 50a project downward, and the projecting ends But,
When the upper horseshoe-shaped guide frame 44 and the lower horseshoe-shaped guide frame 52 come close to a predetermined distance, the lower stopper
It is configured to abut the end of 62.

FIG. 8 shows a new electrode stand / tilt device.
64 is a mounting table 65 for mounting a plurality of new electrodes 12 on the upper surface in the horizontal axis posture, and is provided on the side of the mounting table 65 to change the posture of the new electrodes 12 in the horizontal axis posture to the vertical axis posture. And a tilting device 66. The tilting device 66 has a receiving portion 67 whose posture can be changed between a horizontal posture and a vertical posture, and the posture of the receiving portion 67 can be changed by a hydraulic cylinder 68.

The new electrode 12 on the mounting table 65 is rolled to move to the receiving portion 67, and the new electrode 12 is moved to the receiving portion 67 with a wire or the like.
Then, the new electrode 12 is changed from the horizontal axis posture to the vertical axis posture by tilting the receiving portion 67 with the hydraulic cylinder 68. Hereinafter, a method of using the electrode connecting device 1 having the above structure will be described. In FIG. 9, the new electrode 12 placed in the horizontal axis posture on the table 65 of the new electrode table / tilting device 64 is rolled and placed on the receiving portion 67 of the tilting device 66, and the wire is used. The new electrode 12 is fixed and rotated by the hydraulic cylinder 68 to change the attitude of the new electrode 12 to the vertical axis attitude. At this time, the connection screw 17 is located at the lower end of the new electrode 12 in the vertical posture, and a predetermined space is formed between the lower end surface and the floor surface.

The electrode connecting device 1 is attached to a hanging device 2 such as a crane.
It is hung from the tilting device 66 and positioned on the side of the new electrode 12 held in the tilting device 66 in the vertical posture. Next, the upper horseshoe-shaped guide frame 44 of the new electrode guide device 15 and the side openings 45, 53 of the lower horseshoe-shaped guide frame 52 of the old electrode guide device 19 are located on the new electrode 12 side, The electrode connecting device 1 is moved to the new electrode 12 side (moved in the direction of arrow a in FIG. 9). Then, the new electrode 12 is accommodated in the electrode connecting device 1 through the side openings of the upper and lower horseshoe-shaped guide frames 44, 52. At this time, the new electrode 12 respectively pushes the upper stopper 48 of the new electrode stopper device 16 and the lower stopper 62 of the old electrode stopper device 23 to move the respective stoppers 48, 62 to the upper and lower horseshoe-shaped guide frames 44, 52.
Of the contact surfaces 46, 54 of the. And the new electrode 12
The outer peripheral surfaces of the upper and lower horseshoe-shaped guide frames 44,52
Abutting against the contact surfaces 46, 54 of the new electrode 12 and the rotating inner cylinder 9
The axis centers of are the same. At this time, the reverse rotation detection limit switch 38 is also pushed by the side surface of the new electrode 12.

Next, the electrode connecting device 1 is lowered in the direction of arrow b in FIG. Due to this descent, the upper part of the new electrode 12 is housed in the rotating inner cylinder 9, and the lower end surface of the new electrode 12 passes through the old electrode guide device 19 and further through the upper stopper 48. Then, the upper stopper 48 is released from the pushing motion of the side surface of the new electrode 12 and is returned to the original protruding state by the spring 49. The lower stopper 62 is also returned to the original protruding state by the spring 63.

Then, the electrode connecting device 1 is raised by the suspending device 2 so that the lower end surface of the new electrode 12 is supported by the upper stopper 48 and is held in the electrode connecting device 1.
The new electrode 12 leaves the tilting device 66. Next, the electrode connecting device 1 holding the new electrode 12 is moved to near the furnace top of the electric furnace by the suspending device 2. Then, the power supply cable and the air blow hose provided near the electric furnace are connected to the electrode connecting device 1.

Next, as shown in (1) of FIG. 10, a side opening of the lower horseshoe-shaped guide frame 52 of the old electrode guide device 19.
The electrode connecting device 1 is moved so that 53 is located beside the old electrode 20 held by the electrode holder 69 of the electric furnace. At this time, the lower stopper 62 of the old electrode stopper device 23
However, the hanging height of the electrode connecting device 1 is adjusted so that it is located above the upper end surface of the old electrode 20. Then turn on the air blow switch, and connect the upper end surface of the old electrode 20 and the connected screw.
Air blow nozzle to blow dust adhering to 21
Eject air from 26. This air blow operation is performed remotely by the crane operator.

Next, as shown in FIG. 10 (2), the electrode connecting device 1 is moved laterally so that the outer peripheral surface of the old electrode 20 is brought into contact with the lower horseshoe-shaped guide frame 52 of the old electrode guide device 19. surface
Abut on 54. By this contact, the new electrode 12 and the old electrode 20
Centering is completed. At this time, detection means (not shown) for detecting the contact between the side surface of the old electrode 20 and the contact surface 54 of the guide frame 52 is provided, and the red lamp is lit when both contact. There is. Therefore, the crane operator can stop the lateral movement of the electrode connecting device 1 by seeing the lighting of the red lamp.

Next, as shown in (3) of FIG.
2 Lower the electrode connecting device 1. This lowering causes the lower stopper 62 of the old electrode stopper device 23 to move to the old electrode.
Abut the upper end surface of 20. When the electrode connecting device 1 is further lowered, the lower stopper 62 is in contact with the upper end surface of the old electrode 20, so that the lowering of the old electrode guide device 19 is prevented, the hanging frame device 3 is lowered, and the old electrode guide device is lowered. The rope 18 that was hanging 19 loosens.

At this time, the hanging frame device 3 and the old electrode guide device 19 are moved relative to each other by the vertical guide portion 25 without misalignment. Since the rope 18 starts to loosen when the lower stopper 62 comes into contact with the upper end surface of the old electrode 20, the hanging frame device 3 is gradually lowered thereafter, and the connection screw 17 of the new electrode 12 is started. When it contacts the connected screw 21 of the old electrode 20, the descent is stopped.

At this time, the pin 56 provided on the lower horseshoe-shaped guide frame 52 is replaced by the upper horseshoe-shaped guide frame 44.
It comes into contact with and pushes the detection switch 51 provided on the.
By pushing this switch 51, the descent of the hanging frame device 3 is stopped, the motor 36 of the hydraulic pump 34 is turned on, the pump 34 is activated, and the lock switch is turned on. The hydraulic oil is supplied to the hydraulic cylinder 39 of No. 2 and the hydraulic cylinder 57 of the old electrode clamp device 22, and the new electrode 12 is supplied to the upper vise 42 and the lower vise 60.
And the old electrode 20 is clamped. Further, by the operation of the detection switch 51, the hydraulic cylinder 50 for operating the new electrode stopper device 16 and the old electrode stopper device 23 is automatically operated to retract the upper stopper 48 and the lower stopper 62, and the new electrode 12 and The contact with the old electrode 20 is released.

Next, the motor 29 of the rotating device 11 is activated to rotate the rotating inner cylinder 9, and the rotating inner cylinder 9 is lowered by the elevating device 10 with the same lead as the connecting screw 17. New electrode clamp device 14
The new electrode 12 held by the rotating inner cylinder 9 also rotates and descends in accordance with the rotation and lowering of the rotating inner cylinder 9.
Connection screw 17 and connected screw 21 are screwed together, and new electrode 12 and old electrode
20 are connected. This connection is completed when the motor of the rotating device 11 is
By detecting the torque of 29, the motor 29 is stopped.

When the connection of both electrodes 12, 20 is completed, the clamp of the new electrode clamp device 14 is released, and the air blow is also stopped. Then, the suspension frame device 3 is lifted up by the suspension device 2 until the rope 18 connecting the lower frame 8 and the old electrode guide device 19 is stretched. Next, the clamp of the electrode holder 69 is loosened, the electrode holder 69 is raised, and the electrode length is adjusted. Then the electrode holder
The connection electrode is held at 69, and the old electrode clamp 22 is released.

Next, as shown in FIG. 10 (5), the electrode connecting device 1 is raised. At this time, the connected old and new electrodes 12,
Since 20 is held by the electrode holder 69 of the electric furnace, only the electrode connecting device 1 rises, the upper end surface of the new electrode 12 passes through the reverse rotation detection limit switch 38, and the limit switch 38 is opened by the spring. To the position where the limit switch 38 is actuated, and the motor 29 of the rotating device 11 is rotated in the reverse direction. By this reverse rotation, the rotating inner cylinder 9 rises with respect to the hanging frame device 3. When the reverse rotation of the motor 29 of the rotating device 11 is started, the rise of the electrode connecting device 1 is stopped. After that, the suspension device 2
1 is moved laterally to be positioned outside the electrode, the power supply cable and the air blow hose are disconnected, and the electrode connecting device 1 is moved to the original standby position.

The electrode connection work is completed as described above. Each of the above operations is automatically performed by the sequencer. The present invention is not limited to the above embodiment.

[0046]

According to the present invention, the electrode can be connected by the remote operation of the crane man without the operator going up on the furnace or the deck around the furnace of the electric furnace, and the connection work can be improved. .

[Brief description of drawings]

FIG. 1 is a drawing showing an overall configuration of an electrode connecting device according to an embodiment of the present invention.

2 (1) is a front view of the electrode connecting device, and FIG. 2 (2) is a side view thereof.

FIG. 3 is a partial cross-sectional front view showing the upper structure of the electrode connecting device.

FIG. 4 is a partial cross-sectional side view showing the upper structure of the electrode connecting device.

FIG. 5 is a partially cutaway front view showing a lower structure of the electrode connecting device.

FIG. 6 is a plan view showing a new electrode guide device.

FIG. 7 is a plan view showing an old electrode guide device.

FIG. 8 is a plan view showing a table and tilting device.

FIG. 9 is a process drawing showing a first process of connection work by the electrode connecting device.

FIG. 10 is a process diagram showing a connecting work on the furnace.

FIG. 11 is a perspective view showing a ground operation by a conventional electrode connecting device.

FIG. 12 is a perspective view showing a furnace operation by a conventional electrode connecting device.

[Explanation of symbols]

 1 New electrode connection device 2 Suspension device 3 Suspension frame device 9 Rotating inner cylinder 10 Lifting device 11 Rotating device 12 New electrode 14 New electrode clamp device 15 New electrode guide device 16 New electrode stopper device 17 Connection screw 19 Old electrode guide device 20 Old electrode 21 Connected screw 22 Old electrode clamp device 23 Old electrode stopper device

Claims (1)

[Claims] 1. A suspension frame device that is suspended by a suspension device that is movable in the horizontal and vertical directions, a rotating inner cylinder that is rotatably supported by the suspension frame device in a vertical posture, and a rotating inner cylinder. A new electrode clamp device that clamps a new electrode having a connection screw at the lower end portion housed in a cylinder so as to be engageable with and disengageable from the rotating inner cylinder, and a rotating device that rotates the rotating inner cylinder around its axis. An elevating device for moving the rotating inner cylinder up and down with respect to the hanging frame device by the same lead as the connection screw of the new electrode by the rotation of the rotating inner cylinder, and the hanging frame device below the rotating inner cylinder. Has a side opening through which the new electrode can pass, and when it contacts the outer peripheral surface of the new electrode, the axis of the new electrode is aligned with the axis of the rotating inner cylinder. A new electrode guide device having a contact surface,
A new electrode stopper device that is provided below the new electrode guide device, supports the lower end surface of the new electrode, and holds the new electrode with respect to the suspension frame device, and a retractable new electrode stopper device, and the suspension frame device. A side opening is provided at the lower end that can move up and down, and has a connected screw that is screwed into the connecting screw of the new electrode at the upper end to allow passage of the old electrode held in the electrode holder of the electric furnace. And an old electrode guide device having an abutting surface for aligning the axis of the old electrode with the axis of the new electrode when abutting on the outer peripheral surface of the old electrode. The present invention is characterized by comprising: an old electrode clamp device for detachably clamping the old electrode, and an old electrode stopper device provided on the old electrode guide device and capable of advancing and retracting abutting against an upper end surface of the old electrode. Electrode furnace electrode connection device.